阅读说明：本技术 一种隔膜泵的柔性气动驱动方法 (Flexible pneumatic driving method of diaphragm pumps ) 是由 张勤 于 2019-07-22 设计创作，主要内容包括：本发明提供了一种隔膜泵的柔性气动驱动方法,其步骤在于：首先,配气阀与第一单向阀相配合交替对主动气缸中的左气室与右气室进行配气,主动活塞将带动往复杆往复运动,从动气缸与泵本体连接接通并且对泵本体进行柔性驱动；而后,排气阀与交替配气机构将受压缩的左气室/右气室内的气体排出并且推动配气阀芯滑动至配气阀腔的左端/右端,使配气阀交替对左气室/右气室进行配气；在上述步骤中,当密闭气室体积增大并且转变为负压状态,吸入阀自动切换至打开状态并且输送液体流入至工作室内；当密闭气室体积逐渐减小并且转变为正压状态,排出阀自动切换至打开状态并且使工作室内的液压经过排液管排出至指定点。(The invention provides a flexible pneumatic driving method of diaphragm pumps, which comprises the steps that firstly, a gas distribution valve is matched with a one-way valve to alternately distribute gas to a left gas chamber and a right gas chamber in a driving cylinder, a driving piston drives a reciprocating rod to reciprocate, a driven cylinder is communicated with a pump body and flexibly drives the pump body, then, a gas exhaust valve and an alternate gas distribution mechanism exhaust gas in the compressed left gas chamber/right gas chamber and push a gas distribution valve core to slide to the left end/right end of a gas distribution valve cavity, so that the gas distribution valve alternately distributes gas to the left gas chamber/right gas chamber, in the step, when the volume of a closed gas chamber is increased and is converted into a negative pressure state, a suction valve automatically switches to an open state and conveys liquid to a working chamber, and when the volume of the closed gas chamber is gradually reduced and is converted into a positive pressure state, an exhaust valve automatically switches to the open state and liquid pressure in the working chamber is exhausted to a designated point through a liquid.)

The flexible pneumatic driving method of kinds of diaphragm pumps includes the following steps:

() a reciprocating drive phase;

s1, the air distribution valve and the one-way valve are matched to alternately distribute air to the left air chamber and the right air chamber in the driving cylinder, the driving piston reciprocates left and right in the cylinder , and the driving piston drives the reciprocating rod to move synchronously;

the driving cylinder comprises a cylinder body which is fixedly installed on the mounting frame and is provided with openings at two ends, a left end cover which is in sealing connection and matching with the left opening of the cylinder body is arranged at the left opening of the cylinder body, a right end cover which is in sealing connection and matching with the right opening of the cylinder body is arranged at the right opening of the cylinder body, a driving piston which is in sealing sliding guide and matching with the cylinder body is arranged in the cylinder body, a reciprocating rod is coaxially and fixedly arranged on the driving piston, the middle position of the reciprocating rod along the axial direction of the reciprocating rod is fixedly connected with the driving piston, the end part of the reciprocating rod extends to the outside from the left end cover and the right end cover respectively, a left;

in the process of distributing gas to the left gas chamber by matching the gas distribution valve with the -th one-way valve, when the gas distribution valve core slides to the left end of the gas distribution valve chamber, the right core blocks the right outlet, at the moment, the main inlet is communicated with the left outlet, high-pressure gas enters the input end of the one-way valve body through the input guide pipe, the high-pressure gas pushes the sealing cylinder to slide towards the annular step by overcoming the elastic action of the sealing spring until the sealing cylinder is attached to the annular step, at the moment, the butt joint hole is aligned and communicated with the butt joint groove, the high-pressure gas sequentially passes through the butt joint hole and the butt joint groove to enter the output guide pipe, the output guide pipe outputs the high-pressure gas into the left gas chamber, and the gas distribution valve is during the process of distributing gas to the right;

s2: the reciprocating rod drives the driven pistons in the two driven cylinders to synchronously move, and the driven cylinders are connected and communicated with the pump body and flexibly drive the pump body;

the driven cylinder is provided with two cylinders which are respectively connected with the end parts of the reciprocating rods, the driven cylinder comprises a second cylinder body which is fixedly connected with the mounting frame and is provided with openings at two ends, the second cylinder body is coaxially arranged with the cylinder body, a driven piston which forms a sealed sliding guide fit with the second cylinder body is arranged in the second cylinder body, a sealing cover which forms a sealed connection fit with the second cylinder body is arranged at the opening of the second cylinder body, which is far away from the end of the cylinder body, a gas leakage cover which is matched with the second cylinder body is arranged at the opening of the second cylinder body, which is close to the end of the cylinder body, a sealed gas chamber is formed between the driven piston and the sealing cover, a connecting rod which is used for connecting the;

the two pump bodies correspond to the driven pistons and are used for receiving pneumatic power transmitted by the driven cylinders and sucking and discharging conveying liquid at high pressure in a negative pressure mode, the input end of each pump body is connected with a conveying liquid source, and the output end of each pump body points to a discharge point of the conveying liquid;

s3: the exhaust valve and the alternative air distribution mechanism exhaust the compressed air in the left air chamber/the right air chamber and push the air distribution valve core to slide to the left end/the right end of the air distribution valve cavity, so that the air distribution valve alternately distributes air to the left air chamber/the right air chamber;

(II) liquid suction stage;

s4, when the driven piston slides close to the driving cylinder, the volume of the sealed air chamber increases and changes into a negative pressure state, the diaphragm will bulge towards the pump shell and make the working chamber change into a negative pressure state, at the moment, the suction valve automatically switches to an open state, the conveying liquid flows into the working chamber through the liquid inlet pipe under the action of the external atmospheric pressure, and the suction valve automatically switches to a closed state;

the pump body comprises a round drum-shaped pump case coaxially and fixedly connected with a sealing cover, a round drum-shaped pump case II buckled with the sealing cover is coaxially and fixedly arranged at an opening of the pump case deviating from the sealing cover, a round diaphragm is fixedly arranged between the pump case and the pump case II, a cavity is formed between the diaphragm and the pump case , a cavity is communicated with a closed air chamber, a cavity II is formed between the diaphragm and the pump case II, the cavity II is communicated with a liquid storage pipe, the communication position is positioned between the input end and the output end of the liquid storage pipe, the cavity II and the liquid storage pipe jointly form a working chamber with variable volume, a three-way liquid inlet pipe is arranged between the input ends of the two liquid storage pipes, the input end of the inlet pipe is communicated with a liquid conveying source, the output end of the inlet pipe is connected with the input end of the liquid storage pipe, a suction valve used for enabling conveying liquid to flow from the liquid inlet pipe to the liquid storage pipe in a one-way direction is arranged at the input end of the liquid storage pipe, a three-way liquid discharge pipe is arranged at the connection position, the output end of the liquid storage pipe is connected with the positive pressure discharge point of the liquid storage pipe, the input pipe is arranged at the connection position, the position of the liquid storage pipe, the discharge valve used for;

(III) liquid discharging stage;

s5: when the driven piston slides away from the driving cylinder, the volume of the closed air chamber is gradually reduced and is converted into a positive pressure state, the diaphragm is blown towards the second pump shell and pressurizes liquid sucked in the working chamber, and at the moment, the discharge valve is automatically switched to an open state and the hydraulic pressure in the working chamber is discharged to a designated point through the discharge pipe.

2. The flexible pneumatic driving method of kinds of diaphragm pumps of claim 1, wherein the air distribution valve comprises an air distribution valve body fixedly mounted on the mounting frame and located at the side of the cylinder , an air distribution valve cavity is disposed in the air distribution valve body, the air distribution valve cavity is cylindrical and hollow, and axially parallel to the axial direction of the reciprocating rod, the air distribution valve cavity is provided with a main inlet connected with the high pressure air source, a left outlet connected with the left air chamber, and a right outlet connected with the right air chamber, the main inlet is located at the middle position of the air distribution valve cavity along the axial direction thereof, the left outlet and the right outlet are located at the same side and are arranged opposite to the main inlet, and the left outlet and the right outlet are symmetrically.

3. A flexible pneumatic driving method for kinds of diaphragm pumps in accordance with claim 2, wherein the air distribution valve cavity is provided therein with an air distribution valve core forming a sealed sliding guide fit therewith, the air distribution valve core comprises a left core body, a right core body and a mandrel coaxially and fixedly connected therewith, the mandrel has a diameter smaller than that of the left core body, the left core body is used for plugging the left outlet, the right core body is used for plugging the right outlet, the maximum distance between the left core body and the left end of the air distribution valve cavity is equal to the distance between the left outlet and the left end of the air distribution valve cavity, and the maximum distance between the right core body and the right end of the air distribution valve cavity is equal to the distance between the right outlet and the right end of the air distribution.

4. A flexible pneumatic driving method of kinds of diaphragm pumps according to claim 3, wherein a th check valve is disposed between the left outlet and the left air chamber, and a th check valve is disposed between the right outlet and the right air chamber.

5. The flexible pneumatic driving method of kinds of diaphragm pumps according to claim 4, wherein the th check valve includes a check valve body and a cylindrical hollow inner cavity is provided in the check valve body, an input conduit for connecting and connecting the input end of the check valve body and the left/right outlet is provided between the input end of the check valve body and the left/right outlet, an output conduit for connecting and connecting the output end of the check valve body and the left/right end cap is provided between the output end of the check valve body and the output end , the inner cavity of the check valve body is coaxially and fixedly provided with an annular step, a sealing cylinder forming a sealed sliding guide fit with the inner cavity of the check valve body is further coaxially provided within the inner cavity of the check valve body, the sealing cylinder is arranged close to the output end of the check valve body and is arranged close to the input end of the check valve body, a sealing spring is provided within the sealing cylinder, the sealing spring end abuts against the closed end of the sealing cylinder, the other end abuts against the annular step, the elastic force of the sealing spring always points from the annular step to the closed end of the sealing cylinder, the annular step is arranged between the inner cavity of the check valve body and the sealing cylinder is arranged coaxially provided with a plurality of abutting holes, and the abutting holes are arranged along the.

6. A flexible pneumatic driving method of kinds of diaphragm pumps, according to claim 1, wherein the exhaust valve comprises two exhaust valve bodies and common exhaust valve spools, the two exhaust valve bodies are arranged symmetrically left and right and are arranged corresponding to the left and right end caps , the exhaust valve body on the left side is used for exhausting the compressed gas in the left air chamber, the exhaust valve body on the right side is used for exhausting the compressed gas in the right air chamber, and the exhaust valve spools are used for controlling the on-off of the inside of the exhaust valve spools.

7. The flexible pneumatic driving method of kinds of diaphragm pumps of claim 6, wherein the exhaust valve further comprises a fixed plate fixedly mounted on the mounting bracket and located on the other side of the cylinder , and an exhaust valve body fixedly mounted on the fixed plate, the exhaust valve body is provided with a cylindrical inner cavity with left and right openings arranged, the axial direction of the inner cavity is parallel to the axial direction of the reciprocating rod, the end of the exhaust valve body away from the fixed plate is provided with an exhaust inlet communicated with the inner cavity thereof, the end close to the fixed plate is provided with an exhaust outlet communicated with the inner cavity thereof, and the exhaust outlet is communicated with the outside, the exhaust inlet and the exhaust outlet are arranged opposite, a docking conduit is provided between the exhaust inlet and the th one-way valve on the same side, the input end of the docking conduit is communicated with the inner cavity of the th one-way valve, the communication position is located between the annular step and the sealing cylinder in the initial state, the output end of the docking conduit is communicated with the exhaust inlet, the exhaust valve core is provided with a rod-like structure with the exhaust valve core, the exhaust valve core is movably inserted in the inner cavity of the exhaust valve body along the axial direction, and the axial end of the exhaust valve core.

8. The flexible pneumatic driving method of kinds of diaphragm pumps of claim 7, wherein the exhaust valve core is coaxially and fixedly sleeved with an external boss along the middle position of the exhaust valve core, the outer portion of the exhaust valve core is movably sleeved with two return springs, the two return springs are respectively located at the sides of the external boss, the end of the return spring abuts against the external boss, the other end of the return spring abuts against the exhaust valve body, the elastic force of the return spring is always directed to the external boss by the exhaust valve body, the elastic force of the two return springs is balanced in the initial state, and the external boss is located between the two exhaust valve bodies.

9. A flexible pneumatic driving method of kinds of diaphragm pumps, according to claim 8, wherein the external boss is fixed with a rectangular connecting plate whose length direction is parallel to the axial direction of the reciprocating rod near the side of the cylinder , the middle of the connecting plate along the length direction is fixed with the external boss, the end of the connecting plate along the length direction is provided with a trigger plate extending towards the cylinder , the distance between the two trigger plates is less than the distance of the left and right movement of the active piston, the end of the reciprocating rod is fixed with a linking frame, the linking frame is fixed with a trigger bump, and the trigger bump is located at the middle position of the two trigger plates in the initial state.

10. The flexible pneumatic driving method of kinds of diaphragm pumps of claim 1, wherein the alternative air distribution mechanism has two, alternative air distribution mechanism is installed between the left docking conduit and the right end of the air distribution valve chamber, another alternative matching mechanism is installed between the right docking conduit and the left end of the air distribution valve chamber, the alternative air distribution mechanism includes a second one-way valve, a second docking conduit and an exhaust pipe with several exhaust holes, the output end of the second one-way valve is connected to the left/right end of the exhaust valve chamber, the input end of the second docking conduit is connected to the docking conduit , the output end of the second docking conduit is connected to the input end of the second one-way valve, the structure, size and shape of the second one-way valve are completely equal to one-way valve , the input end of the outer conduit is connected to the inner chamber of the second one-way valve, and the connection position is between the annular step in the second one-way valve and the sealing cylinder in the.

Technical Field

The invention relates to diaphragm pumps, in particular to a flexible pneumatic driving method of diaphragm pumps.

Background

The diaphragm pump has application scenes of , has broad development prospect, changes the volume of a working chamber by back-and-forth fluctuation of diaphragm sheets so as to suck and discharge liquid, the cylinder head part of the pneumatic diaphragm pump mainly separates the conveyed liquid from the working liquid by diaphragm sheets, when the diaphragm sheets move to a transmission mechanism , the working chamber in a pump cylinder sucks liquid for negative pressure, when the diaphragm sheets move to another side, the sucked liquid is pressurized and discharged, the back-and-forth fluctuation of the existing diaphragm sheets is usually directly driven by a mechanical driving mechanism, the driving end of the mechanical driving mechanism is connected with a motor, and the output end of the mechanical driving mechanism is connected with the diaphragm sheets.

Disclosure of Invention

In order to solve the defects of the prior art, the invention aims to provide flexible pneumatic driving methods of the diaphragm pump, which have skillful structure, simple principle and high transmission efficiency and can flexibly drive the diaphragm through compressed air.

In order to achieve the technical purpose, the technical scheme adopted by the invention is as follows.

A method for flexible pneumatic driving of a diaphragm pump, comprising the steps of:

() a reciprocating drive phase;

s1, the air distribution valve and the one-way valve are matched to alternately distribute air to the left air chamber and the right air chamber in the driving cylinder, the driving piston reciprocates left and right in the cylinder , and the driving piston drives the reciprocating rod to move synchronously;

the driving cylinder comprises a cylinder body which is fixedly installed on the mounting frame and is provided with openings at two ends, a left end cover which is in sealing connection and matching with the left opening of the cylinder body is arranged at the left opening of the cylinder body, a right end cover which is in sealing connection and matching with the right opening of the cylinder body is arranged at the right opening of the cylinder body, a driving piston which is in sealing sliding guide and matching with the cylinder body is arranged in the cylinder body, a reciprocating rod is coaxially and fixedly arranged on the driving piston, the middle position of the reciprocating rod along the axial direction of the reciprocating rod is fixedly connected with the driving piston, the end part of the reciprocating rod extends to the outside from the left end cover and the right end cover respectively, a left;

the gas distribution valve comprises a gas distribution valve body which is fixedly arranged on the mounting frame and positioned on the side of the cylinder body, a gas distribution valve cavity which is cylindrical and hollow and is axially parallel to the axial direction of the reciprocating rod is arranged in the gas distribution valve body, a main inlet which is connected and communicated with a high-pressure gas source, a left outlet which is connected with the left gas chamber and a right outlet which is connected with the right gas chamber are arranged on the gas distribution valve cavity, the main inlet is positioned in the middle position of the gas distribution valve cavity along the axial direction, the left outlet and the right outlet are positioned on the same side and are arranged opposite to the main inlet, the left outlet and the right outlet are symmetrically arranged along the axial direction of the main inlet, in order to enable the main inlet to be connected and communicated with the left outlet or the main inlet to be connected and communicated with the right outlet, a gas distribution valve core which forms a sealed sliding guide fit with the gas distribution valve cavity is arranged in the gas distribution valve cavity, the gas distribution valve core comprises a left core body, a right core body and a mandrel which are coaxially and fixedly connected with the left core body, the diameter of the same size as that the left core body is smaller than the diameter of the left core body;

an th one-way valve is arranged between the left outlet and the left air chamber, and a th one-way valve is arranged between the right outlet and the right air chamber;

in the process of distributing gas to the left gas chamber by matching the gas distribution valve with the -th one-way valve, when the gas distribution valve core slides to the left end of the gas distribution valve chamber, the right core blocks the right outlet, at the moment, the main inlet is communicated with the left outlet, high-pressure gas enters the input end of the one-way valve body through the input guide pipe, the high-pressure gas pushes the sealing cylinder to slide towards the annular step by overcoming the elastic action of the sealing spring until the sealing cylinder is attached to the annular step, at the moment, the butt joint hole is aligned and communicated with the butt joint groove, the high-pressure gas sequentially passes through the butt joint hole and the butt joint groove to enter the output guide pipe, the output guide pipe outputs the high-pressure gas into the left gas chamber, and the gas distribution valve is during the process of distributing gas to the right;

s2: the reciprocating rod drives the driven pistons in the two driven cylinders to synchronously move, and the driven cylinders are connected and communicated with the pump body and flexibly drive the pump body;

the driven cylinder is provided with two cylinders which are respectively connected with the end parts of the reciprocating rods, the driven cylinder comprises a second cylinder body which is fixedly connected with the mounting frame and is provided with openings at two ends, the second cylinder body is coaxially arranged with the cylinder body, a driven piston which forms a sealed sliding guide fit with the second cylinder body is arranged in the second cylinder body, a sealing cover which forms a sealed connection fit with the second cylinder body is arranged at the opening of the second cylinder body, which is far away from the end of the cylinder body, a gas leakage cover which is matched with the second cylinder body is arranged at the opening of the second cylinder body, which is close to the end of the cylinder body, a sealed gas chamber is formed between the driven piston and the sealing cover, a connecting rod which is used for connecting the;

the two pump bodies correspond to the driven pistons and are used for receiving pneumatic power transmitted by the driven cylinders and sucking and discharging conveying liquid at high pressure in a negative pressure mode, the input end of each pump body is connected with a conveying liquid source, and the output end of each pump body points to a discharge point of the conveying liquid;

s3: the exhaust valve and the alternative air distribution mechanism exhaust the compressed air in the left air chamber/the right air chamber and push the air distribution valve core to slide to the left end/the right end of the air distribution valve cavity, so that the air distribution valve alternately distributes air to the left air chamber/the right air chamber;

(II) liquid suction stage;

s4, when the driven piston slides close to the driving cylinder, the volume of the sealed air chamber increases and changes into a negative pressure state, the diaphragm will bulge towards the pump shell and make the working chamber change into a negative pressure state, at the moment, the suction valve automatically switches to an open state, the conveying liquid flows into the working chamber through the liquid inlet pipe under the action of the external atmospheric pressure, and the suction valve automatically switches to a closed state;

the pump body comprises a round drum-shaped pump case coaxially and fixedly connected with a sealing cover, a round drum-shaped pump case II buckled with the sealing cover is coaxially and fixedly arranged at an opening of the pump case deviating from the sealing cover, a round diaphragm is fixedly arranged between the pump case and the pump case II, a cavity is formed between the diaphragm and the pump case , a cavity is communicated with a closed air chamber, a cavity II is formed between the diaphragm and the pump case II, the cavity II is communicated with a liquid storage pipe, the communication position is positioned between the input end and the output end of the liquid storage pipe, the cavity II and the liquid storage pipe jointly form a working chamber with variable volume, a three-way liquid inlet pipe is arranged between the input ends of the two liquid storage pipes, the input end of the inlet pipe is communicated with a liquid conveying source, the output end of the inlet pipe is connected with the input end of the liquid storage pipe, a suction valve used for enabling conveying liquid to flow from the liquid inlet pipe to the liquid storage pipe in a one-way direction is arranged at the input end of the liquid storage pipe, a three-way liquid discharge pipe is arranged at the connection position, the output end of the liquid storage pipe is connected with the positive pressure discharge point of the liquid storage pipe, the input pipe is arranged at the connection position, the position of the liquid storage pipe, the discharge valve used for;

(III) liquid discharging stage;

s5: when the driven piston slides away from the driving cylinder, the volume of the closed air chamber is gradually reduced and is converted into a positive pressure state, the diaphragm is blown towards the second pump shell and pressurizes liquid sucked in the working chamber, and at the moment, the discharge valve is automatically switched to an open state and the hydraulic pressure in the working chamber is discharged to a designated point through the discharge pipe.

As a further optimization or improvement of the present solution .

The th check valve comprises a check valve body, a cylindrical hollow inner cavity is arranged in the check valve body, an input conduit for connecting and connecting the input end of the check valve body and the left outlet/right outlet is arranged between the input end of the check valve body and the left end cover/right end cover, an output conduit for connecting and connecting the output end of the check valve body and the left outlet/right outlet is arranged between the output end of the check valve body and the left end cover/right end cover, an annular step is coaxially and fixedly arranged in the inner cavity of the check valve body close to the output end of the inner cavity of the check valve body, a sealing cylinder body which forms a sealed sliding guide fit with the inner cavity of the check valve body is coaxially arranged in the inner cavity of the check valve body, a sealing spring is arranged in the sealing cylinder body, the end abuts against the closed end of the sealing cylinder body, the end abuts against the annular step, the elastic force of the sealing spring always points to the closed end of the sealing cylinder body from the annular step, an annular butt groove is coaxially arranged in the inner cavity of the check valve body, an annular butt joint groove is arranged between the annular step and the input end of the check valve body, a plurality of butt joint holes which are arranged in.

As a further optimization or improvement of the present solution .

The exhaust valve comprises two exhaust valve bodies and shared exhaust valve cores, the two exhaust valve bodies are arranged in bilateral symmetry and are arranged corresponding to the left end cover and the right end cover , the exhaust valve body positioned on the left side is used for exhausting the compressed gas in the left air chamber, the exhaust valve body positioned on the right side is used for exhausting the compressed gas in the right air chamber, and the exhaust valve cores are used for controlling the on-off of the inside of the exhaust valve cores;

the exhaust valve further comprises a fixed plate which is fixedly installed on the installation frame and located on the other side of the cylinder , an exhaust valve body is fixedly installed on the fixed plate, a columnar inner cavity with openings at the left end and the right end is formed in the exhaust valve body, the axial direction of the inner cavity is parallel to the axial direction of the reciprocating rod, an exhaust inlet communicated with the inner cavity is formed in the end, away from the fixed plate , of the exhaust valve body, an exhaust outlet communicated with the inner cavity is formed in the end, close to the fixed plate , of the exhaust valve body, the exhaust outlet is communicated with the outside, the exhaust inlet and the exhaust outlet are arranged in an opposite mode, a butt-joint guide pipe is arranged between the exhaust inlet and the -th one-way valve on the same side, the input end of the butt-joint guide pipe is communicated with the inner cavity of the -way valve, the communication position is located between the annular step and the sealing cylinder in the initial state, the output end of the butt-joint guide pipe is communicated with the exhaust inlet, the exhaust valve core is arranged in a rod-shaped structure parallel to the axial direction, the exhaust valve core is movably inserted into;

the exhaust valve core is coaxially and fixedly sleeved with an external boss along the axial middle position of the exhaust valve core, the outer part of the exhaust valve core is movably sleeved with two reset springs, the two reset springs are respectively positioned at the sides of the external boss, the end of each reset spring is abutted against the external boss, the end of each reset spring is abutted against the exhaust valve body, the elastic force of each reset spring is always directed to the external boss by the exhaust valve body, and the elastic forces of the two reset springs are balanced with each other and the external boss is positioned in the middle of the two exhaust valve bodies in the initial state.

As a further optimization or improvement of the present solution .

External boss be close to the fixed length direction that is provided with in cylinder body side and be on a parallel with the axial rectangle connecting plate of reciprocating lever, connecting plate middle part position and external boss fixed connection along length direction, the end of connecting plate along its length direction is provided with the trigger plate that extends to towards cylinder body , distance between two trigger plates is less than the distance of initiative piston side-to-side movement, the fixed link that is provided with on the tip position of reciprocating lever, the fixed intermediate position that is located two trigger plates that is provided with under trigger lug and the initial condition that is provided with on the link.

As a further optimization or improvement of the present solution .

The alternative air distribution mechanism is provided with two air distribution mechanisms, wherein the alternative air distribution mechanism is arranged between the left butt joint guide pipe and the right end of the air distribution valve cavity, the alternative matching mechanism is arranged between the right butt joint guide pipe and the left end of the air distribution valve cavity, the alternative air distribution mechanism comprises a second one-way valve, a butt joint guide pipe II and an exhaust pipe provided with a plurality of exhaust holes, the output end of the second one-way valve is communicated with the left end/right end of the exhaust valve cavity, the input end of the butt joint guide pipe II is communicated with the butt joint guide pipe , the output end of the butt joint guide pipe II is communicated with the input end of the second one-way valve, the structure, size and shape of the second one-way valve are completely -like those of the one-way valve, the input end of the outer exhaust pipe is communicated with the inner cavity of the second one.

Compared with the prior art, the pneumatic piston cylinder has the advantages that the structure is ingenious, the principle is simple, the transmission efficiency is high, the pneumatic piston cylinder is directly driven to do reciprocating motion through high-pressure gas, the diaphragm sheets are indirectly driven to be blown through reciprocating motion compressed air, the impact on the diaphragm sheets is reduced, the service life of the diaphragm sheets is prolonged, meanwhile, the two diaphragm sheets are driven to alternately blow through reciprocating motion, and the pneumatic transmission efficiency is improved.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of the overall structure of the present invention.

Fig. 3 is a schematic structural diagram of the working state of the present invention.

Fig. 4 is a schematic structural diagram of the working state of the present invention.

Fig. 5 is a schematic structural view of the pneumatic reciprocation device.

Fig. 6 is a schematic structural view of the cylinder.

Fig. 7 is a connection diagram of the master cylinder and the slave cylinder.

FIG. 8 is a cross-sectional view of the master cylinder and slave cylinder.

FIG. 9 is a connection diagram of the master cylinder with the distributing valve, th check valve.

Fig. 10 is a connection diagram of the distributing valve and the th check valve.

Fig. 11 is a schematic structural diagram of the gas distribution valve.

Fig. 12 is a cross-sectional view of a gas distribution valve.

Fig. 13 is a cross-sectional view of a gas distribution valve.

Fig. 14 is a structural schematic diagram of the check valve.

Fig. 15 is a cross-sectional view of the check valve.

Fig. 16 is a cross-sectional view of the check valve.

Fig. 17 is a partial structure diagram of the check valve.

Fig. 18 is a view showing the pump body and the slave cylinder in cooperation.

Fig. 19 is a partial structural view of the pump body.

Fig. 20 is a partial cross-sectional view of the pump body.

Fig. 21 is a schematic structural view of a diaphragm of the pump body.

FIG. 22 is a connection diagram of an exhaust valve and alternate valve train.

Fig. 23 is a connection diagram of the discharge valve and the th check valve.

Fig. 24 is a partial structural view of the exhaust valve.

Fig. 25 is a partial structural view of the exhaust valve.

Fig. 26 is a partial structure view of the exhaust valve.

FIG. 27 is a diagram of the exhaust valve in conjunction with the master cylinder.

Fig. 28 is a schematic structural view showing a closed state of the exhaust valve.

Fig. 29 is a schematic structural view of a valve train.

FIG. 30 is a connection diagram of an alternate valve train and valve.

FIG. 31 is a connection diagram of an alternate valve train and valve.

Detailed Description

A method for flexible pneumatic driving of a diaphragm pump, comprising the steps of:

() a reciprocating drive phase;

s1, the air distribution valve 130 and the one-way valve 140 are matched to alternately distribute air to the left air chamber 124 and the right air chamber 125 in the driving cylinder 120a, the driving piston 122 reciprocates left and right in the cylinder 121, and the driving piston 122 drives the reciprocating rod 123 to move synchronously;

the driving cylinder 120a comprises a cylinder 121 fixedly mounted on the mounting frame 110 and having two end openings arranged, a left end cover 121a forming a sealing connection fit with the cylinder 121 is arranged at the left opening of the cylinder , a right end cover 121b forming a sealing connection fit with the cylinder is arranged at the right opening of the cylinder, a driving piston 122 forming a sealing sliding guide fit with the cylinder 121 is arranged in the cylinder , a reciprocating rod 123 is coaxially and fixedly arranged on the driving piston 122, the middle position of the reciprocating rod 123 along the axial direction thereof is fixedly connected with the driving piston 122, the end of the reciprocating rod 123 extends to the outside from the left end cover 121a and the right end cover 121b, a left air chamber 124 is formed between the driving piston 122 and the left end cover 121a, and a right air chamber 125 is formed between the driving piston 122 and the right end;

the air distribution valve 130 comprises an air distribution valve body 131 which is fixedly installed on the mounting frame 110 and is positioned on the cylinder 121 side, an air distribution valve cavity 132 which is cylindrical and hollow and is axially parallel to the axial direction of the reciprocating rod 123 is arranged in the air distribution valve body 131, a main inlet 133 which is connected and communicated with a high-pressure air source, a left outlet 134 which is connected with the left air chamber 124 and a right outlet 135 which is connected with the right air chamber 124 are arranged on the air distribution valve cavity 132, the main inlet 133 is positioned in the middle position of the air distribution valve cavity 132 along the axial direction, the left outlet 134 and the right outlet 135 are positioned on the same side and are oppositely arranged with the main inlet 133, the left outlet 134 and the right outlet 135 are axially and bilaterally symmetrically arranged along the main inlet 133, in order to enable the main inlet 133 to be connected and communicated with the left outlet 134 or the main inlet 133 to be connected and communicated with the right outlet 135, an air distribution valve core 136 which forms a sealed sliding guide fit with the air distribution valve cavity 132 is arranged in the air distribution valve cavity 132, the air distribution valve core 136 comprises a left air distribution core body, the right core body and a mandrel which is coaxially and fixedly connected with the left air distribution valve cavity 132, the left end and the right end, the right end of the left end of the;

an th check valve 140 is arranged between the left outlet 134 and the left air chamber 124, and a th check valve 140 is arranged between the right outlet 135 and the right air chamber 125;

in the process of distributing gas to the left gas chamber 124 by the mutual matching of the gas distribution valve 130 and the one-way valve 140, when the gas distribution valve core 136 slides to the left end of the gas distribution valve cavity 132, the right core blocks the right outlet 135, at this time, the main inlet 133 is communicated with the left outlet 134, high-pressure gas enters the input end of the one-way valve body 141 through the input conduit 142, the high-pressure gas pushes the sealing cylinder 145 to slide towards the annular step 144 against the elastic force of the sealing spring 146 until the sealing cylinder 145 is attached to the annular step 144, at this time, the docking hole 147 is communicated with the docking slot 148 in an aligned manner, the high-pressure gas sequentially passes through the docking hole 147 and the docking slot 148 to enter the output conduit 143, the output conduit 143 outputs the high-pressure gas to the left gas chamber 124, and is caused in the process of distributing gas to the left gas chamber 124 by the gas distribution valve 130 in the;

s2: the reciprocating rod 123 drives the driven pistons 127 in the two driven cylinders 120b to move synchronously, and the driven cylinders 120b are connected with the pump body 200 and flexibly drive the pump body 200;

the driven cylinder 120b is provided with two cylinders and respectively connected with the end positions of the reciprocating rod 123, the driven cylinder 120b comprises a second cylinder 126 fixedly connected with the mounting frame 110 and provided with openings at two ends, the second cylinder 126 and the cylinder 121 are coaxially arranged, a driven piston 127 forming sealed sliding guide fit with the second cylinder 126 is arranged in the second cylinder 126, a sealing cover 126a forming sealed connection fit with the second cylinder 126 is arranged at an opening of the second cylinder 126, which is far away from the end of the cylinder 121 , a gas leakage cover 126b matched with the second cylinder 126 and is arranged at an opening of the second cylinder 126, which is close to the end of the cylinder 121 , a sealed air chamber 128 is formed between the driven piston 127 and the sealing cover 126b, a connecting rod for connecting the driven piston 127 and the reciprocating rod 123 is coaxially and fixedly arranged between the driven piston 127 and the reciprocating rod 123, the connecting rod movably penetrates through;

the pump body 200 is provided with two and corresponds to the driven piston 127 , the pump body 200 is used for receiving the pneumatic power transmitted by the driven cylinder 120b and performing negative pressure suction and high pressure discharge on the conveying liquid, the input end of the pump body 200 is connected with the conveying liquid source, and the output end points to the discharge point of the conveying liquid;

s3: the exhaust valve 300 and the alternative air distribution mechanism 400 exhaust the compressed air in the left air chamber 124/the right air chamber 125 and push the air distribution valve core 136 to slide to the left end/the right end of the air distribution valve cavity 132, so that the air distribution valve 130 distributes air to the left air chamber 124/the right air chamber 125 alternatively;

(II) liquid suction stage;

s4, when the driven piston 127 slides close to the driving cylinder 120a, the volume of the sealed air chamber 128 increases and changes to a negative pressure state, the diaphragm 203 will be blown towards the pump shell 201 and make the working chamber change to a negative pressure state, at this time, the suction valve 208 automatically switches to an open state and the conveying liquid will flow into the working chamber through the liquid inlet pipe 207a under the action of the external atmospheric pressure, and the suction valve 208 automatically switches to a closed state;

the pump body 200 comprises a circular drum-shaped pump case 201 coaxially and fixedly connected with a sealing cover 126a, a circular drum-shaped pump case two 202 buckled with the sealing cover 126a is coaxially and fixedly arranged at an opening of the pump case 201 deviating from the sealing cover 126a, a circular diaphragm 203 is fixedly arranged between the pump case 201 and the pump case two 202, a cavity 204 is formed between the diaphragm 203 and the pump case 201, the cavity 204 is communicated with a closed air chamber 128, a cavity two 205 is formed between the diaphragm 203 and the pump case two 202, the cavity two 205 is communicated with a liquid storage pipe 206, the communication position is positioned between an input end and an output end of the liquid storage pipe 206, the cavity two 205 and the liquid storage pipe 206 jointly form a working chamber with variable volume, a three-way liquid inlet pipe 207a is arranged between input ends of the two liquid storage pipes 206, an input end of the liquid inlet pipe 207a is communicated with a conveying pipe, an output end of the liquid storage pipe 206 is connected with the input end of the liquid storage pipe 206, the connection position is provided with a suction valve 207a suction valve used for enabling conveying liquid to flow to the liquid from the liquid inlet pipe 207a one-way liquid storage pipe 206, an output end of the liquid storage pipe 207a liquid storage pipe 207b is arranged in an open state, the automatic discharge valve 207b is arranged at the state, the discharge state, the automatic discharge state of the automatic discharge valve 207b is arranged at the discharge state, and the automatic discharge state, the automatic;

(III) liquid discharging stage;

s5: when the slave piston 127 slides away from the master cylinder 120a, the volume of the closed air chamber 128 gradually decreases and changes to a positive pressure state, the diaphragm 203 will be blown toward the second pump housing 202 and pressurize the liquid sucked into the working chamber, and at this time, the discharge valve 209 automatically switches to an open state and discharges the liquid pressure in the working chamber to a specified point through the discharge pipe 207 b.

A diaphragm pump driven by pneumatic reciprocating, which comprises a pneumatic reciprocating device 100, a pump body 200, an exhaust valve 300 and an alternate air distribution mechanism 400, wherein the pneumatic reciprocating device 100 comprises a mounting frame 110, an air cylinder 120 and an air distribution valve 130 fixedly mounted on the mounting frame 110, the air cylinder 120 comprises a driving air cylinder 120a and a driven air cylinder 120b, the driving air cylinder 120a comprises a cylinder body 121 fixedly mounted on the mounting frame 110 and having two end openings arranged, a left end cover 121a matched with the cylinder body 121 in a sealing connection manner is arranged at the left opening of the cylinder body 39121, a right end cover 121b matched with the cylinder body is arranged at the right opening of the cylinder body, a driving piston 122 matched with the cylinder body 121 in a sealing sliding guide manner is arranged in the cylinder body , a reciprocating rod 123 is coaxially and fixedly connected with the driving piston 122 along the axial middle position of the reciprocating rod 123, the end of the reciprocating rod 123 extends to the outside from the left end cover 121a and the right end cover 121b, a left air chamber 124 is formed between the driving piston 122 and the right air chamber 125 is formed between.

Specifically, the driven cylinder 120b is provided with two cylinders 120b which are respectively connected with the end positions of the reciprocating rod 123, the driven cylinder 120b comprises a second cylinder 126 which is fixedly connected with the mounting frame 110 and is provided with openings at two ends, the second cylinder 126 and the cylinder 121 are coaxially arranged, a driven piston 127 which forms a sealed sliding guide fit with the second cylinder 126 is arranged in the second cylinder 126, a sealing cover 126a which forms a sealed connection fit with the second cylinder 126 is arranged at an opening at the end of the second cylinder 126, which is far away from the cylinder 121 , a gas leakage cover 126b which is matched with the second cylinder 126 and is arranged at an opening at the end, which is close to the cylinder 121 , of the second cylinder 126, a sealed gas chamber 128 is formed between the driven piston 127 and the sealing cover 126b, a connecting rod which is used for connecting the driven piston 127 and the reciprocating rod 123 is coaxially and fixedly arranged between the.

More specifically, two pump bodies 200 are provided and correspond to the slave piston 127 , the pump bodies 200 are used for receiving pneumatic power transmitted by the slave cylinder 120b and performing negative pressure suction and high pressure discharge on the delivery liquid, the input end of the pump bodies 200 is connected with the delivery liquid source, the output end points to the discharge point of the delivery liquid, the exhaust valve 300 is used for discharging the gas inside the compressed left air chamber 124/right air chamber outwards, and the alternating distribution mechanism 400 is used for receiving part of the gas discharged by the exhaust valve 30 and automatically triggering the distribution valve 130 to alternately distribute the gas to the left air chamber 124 and the right air chamber 125.

During the process of pumping liquid, when the gas distribution valve 130 distributes gas to the left gas chamber 124, the driving piston 122 moves to the right and drives the reciprocating rod 123 to move synchronously, the compressed gas in the right gas chamber 125 is discharged out part through the gas discharge valve 300, then the gas discharge valve 300 discharges the compressed gas to the alternative gas distribution mechanism 400, the alternative gas distribution mechanism 400 switches the gas distribution valve 130 to distribute gas to the right gas chamber 125 when the driving piston 122 moves to the right end, at this time, the driving piston 122 moves to the left and drives the reciprocating rod 123 to move synchronously, the compressed gas in the left gas chamber 124 is discharged out part through the gas discharge valve 300, then the gas discharge valve 300 discharges the compressed gas to the alternative gas distribution mechanism 400, the alternative gas distribution mechanism 400 switches the gas distribution valve 130 to the left gas chamber 124 when the driving piston 122 moves to the left end, the gas distribution is performed in a reciprocating manner, so that the reciprocating rod 123 drives the driven piston 127 to reciprocate along the two cylinders 126 and drive the pump body 200, and when the airtight gas chamber 128 increases, the pump body sucks and discharges the liquid into the airtight chamber 200, and pumps the liquid.

The pump body 200 comprises a circular drum-shaped pump case 201 coaxially and fixedly connected with a sealing cover 126a, a circular drum-shaped pump case two 202 fastened with the sealing cover 126a is coaxially and fixedly arranged at an opening of the pump case 201 deviating from the sealing cover 126a, a circular diaphragm 203 is fixedly arranged between the pump case 201 and the pump case two 202, a cavity 204 is formed between the diaphragm 203 and the pump case 201, the cavity 204 is communicated with a closed air chamber 128, a cavity two 205 is formed between the diaphragm 203 and the pump case two 202, the cavity two 205 is communicated with a liquid storage pipe 206, the communication position is positioned between an input end and an output end of the liquid storage pipe 206, the cavity two 205 and the liquid storage pipe 206 jointly form a working chamber with variable volume, in order to facilitate the suction of the left liquid storage pipe 206 and the right liquid storage pipe 206, a three-way liquid storage pipe 207a is arranged between the input ends of the two liquid storage pipes 206, the input end of the liquid storage pipe 207a is communicated with a conveying liquid source, the output end of the conveying liquid storage pipe 206 is connected with the input end of the conveying liquid storage pipe 207a positive pressure, the connection position is arranged at the connection position, the connection position is arranged at which the input end of the conveying liquid storage pipe 207a one-way liquid storage pipe 207a suction valve 208 b, the liquid storage pipe is positioned at an opening state, the inlet pipe 207a discharge valve 207b is positioned at the state, the inlet end of the automatic discharge valve 207b is positioned at the automatic discharge state, the automatic discharge.

In the pump body 200, when the driven piston 127 slides close to the driving cylinder 120a during operation, the volume of the sealed air chamber 128 increases and changes to a negative pressure state, the diaphragm 203 will be blown towards the pump housing 201 and change the working chamber to the negative pressure state, at this time, the suction valve 208 automatically switches to an open state and the conveying liquid will flow into the working chamber through the liquid inlet pipe 207a under the action of the external atmospheric pressure, when the difference between the external air pressure and the working chamber gradually decreases, the suction valve 208 automatically switches to a closed state, when the driven piston 127 slides away from the driving cylinder 120a, the volume of the sealed air chamber 128 gradually decreases and changes to the positive pressure state, the diaphragm 203 will be blown towards the pump housing two 202 and pressurize the liquid sucked into the working chamber, at this time, the discharge valve 209 automatically switches to the open state and discharges the hydraulic pressure in the working chamber to a designated point through the liquid discharge pipe 207 b.

In order to distribute air to the left air chamber 124/the right air chamber 125, the air distribution valve 130 includes an air distribution valve body 131 fixedly mounted on the mounting frame 110 and located on the cylinder 121 side, an air distribution valve cavity 132 which is cylindrical hollow and axially parallel to the axial direction of the reciprocating rod 123 is disposed in the air distribution valve body 131, a main inlet 133 connected and communicated with the high-pressure air source, a left outlet 134 connected with the left air chamber 124, and a right outlet 135 connected with the right air chamber 124 are disposed on the air distribution valve cavity 131, the main inlet 133 is located at the middle position of the air distribution valve cavity 132 along the axial direction, the left outlet 134 and the right outlet 135 are located on the same side and are arranged opposite to the main inlet 133, the left outlet 134 and the right outlet 135 are symmetrically arranged along the axial direction of the main inlet 133, in order to enable the main inlet 133 to be connected and communicated with the left outlet 134 or the main inlet 133 to be connected and communicated with the right outlet 135, the air distribution valve cavity 132 is provided with the air distribution valve core 136 which forms a sliding guide fit with the air distribution valve cavity, the air distribution valve core 136 includes a left core body, a central axis fixedly connected with the left core body, a diameter of the central axis is smaller than a diameter of the left core body, the central axis is used for conducting a distance between the left end of the left end and the right end of the left end 132, the left end of.

Specifically, in order to enable the high-pressure gas discharged from the left outlet 134 to be discharged into the left air chamber 124 or the high-pressure gas discharged from the right outlet 135 to be discharged into the right air chamber 125, a -th check valve 140 is disposed between the left outlet 134 and the left air chamber 124, a -th check valve 140 is disposed between the right outlet 135 and the right air chamber 125, the -th check valve 140 includes a check valve body 141 and a cylindrical hollow inner cavity is disposed in the check valve body 141, an input conduit 142 for connecting and communicating the input end of the check valve body 141 and the left outlet 134/right outlet 135 is disposed between the input end of the check valve body 141 and the left end cover 121 a/right end cover 121b, an output conduit 143 for connecting and communicating the input end of the check valve body 141 is disposed between the output end of the check valve body 141 and the output end 134/right outlet 135, an annular step 144 is coaxially and fixedly disposed between the output end of the check valve body 141 and the right end cover 121b, in order to enable the interior of the check valve body 141 to be unidirectionally communicated from the input end thereof to the output end, an annular step 141, an annular step 144 is coaxially disposed near the output end 141, an annular butt-against an annular sealing groove 145 of the annular butt-sealing cylinder 145, a sealing cylinder 145 is disposed between the cylinder 145 and a sealing cylinder 145, a sealing groove 146 disposed between the cylinder 145 and a sealing cylinder 145, a sealing groove 146, and a sealing groove 146, and a sealing groove 148, which are disposed between the cylinder 145 which are disposed on which are disposed, and a sealing groove 148, which are disposed, and a sealing groove 145 which are disposed, and a sealing groove 148, the sealing groove.

In the process of distributing gas to the left gas chamber 124 by the mutual matching of the gas distribution valve 130 and the one-way valve 140, when the gas distribution valve core 136 slides to the left end of the gas distribution valve cavity 132, the right core blocks the right outlet 135, at this time, the main inlet 133 is communicated with the left outlet 134, high-pressure gas enters the input end of the one-way valve body 141 through the input conduit 142, the high-pressure gas pushes the sealing cylinder 145 to slide toward the annular step 144 against the elastic force of the sealing spring 146 until the sealing cylinder 145 is attached to the annular step 144, at this time, the docking hole 147 is communicated with the docking slot 148 in an aligned manner, the high-pressure gas sequentially passes through the docking hole 147 and the docking slot 148 to enter the output conduit 143, the output conduit 143 outputs the high-pressure gas to the left gas chamber 124, and the gas distribution process of the gas distribution valve 130 to the left gas chamber 124 in the process of distributing gas.

If the compressed air in the left/ right air chambers 124, 125 is not discharged in time, how the high-pressure air will push the driving piston 122 to slide along the cylinder 121, for this reason, the exhaust valve 300 includes two exhaust valve bodies 302 and shared exhaust valve spools 304, the two exhaust valve bodies 302 are arranged in bilateral symmetry and are arranged corresponding to the left end cap 121a and the right end cap 121b , the exhaust valve body 302 on the left side is used for discharging the compressed air in the left air chamber 124, the exhaust valve body 302 on the right side is used for discharging the compressed air in the right air chamber 125, and the exhaust valve spool 304 is used for controlling the on-off of the inside of the exhaust valve spool 302.

Specifically, the exhaust valve 300 further includes a fixed plate 301 fixedly mounted on the mounting bracket 110 and located on the other side of the cylinder 121, and the exhaust valve body 302 is fixedly mounted on the fixed plate 301, the exhaust valve body 302 is provided with a cylindrical inner cavity with left and right ends open and arranged, the axial direction of the inner cavity is parallel to the axial direction of the reciprocating rod 123, the end of the exhaust valve body 302 away from the fixed plate 301 is provided with an exhaust inlet 303a communicated with the inner cavity thereof, the end close to the fixed plate is provided with an exhaust outlet 303b communicated with the inner cavity thereof, the exhaust inlet 303a and the exhaust outlet 303b are arranged opposite to each other, compressed gas in the left air chamber 124/right air chamber 125 is discharged into the exhaust valve body 302, a butt-joint conduit 309 is provided between the exhaust inlet 303a and the same-side of the -th one-way valve 140, the input end of the butt-joint conduit 309 is communicated with the inner cavity of the -way check valve 140, the end of the butt-joint conduit 309 is communicated with the inner cavity of the check valve 140, the axial-joint conduit is provided between the annular step 144 and the sealing cylinder 145 in the initial state, the output end of the butt-joint conduit is communicated with the exhaust inlet 303a connecting groove 304a of the exhaust valve body 304, the axial sliding guide groove is provided in the axial direction of the exhaust valve body 304, and the exhaust valve body 304a, the axial direction of the exhaust valve core 304 is parallel to form an exhaust groove, and the exhaust.

More specifically, the exhaust valve core 304 is coaxially and fixedly sleeved with an external boss 304b along the axial middle position thereof, a return spring 304c is movably sleeved outside the exhaust valve core 304, the two return springs 304c are respectively positioned on the sides of the external boss 304b, the end of the return spring 304c abuts against the external boss 304b, the end of the return spring abuts against the exhaust valve body 302, the elastic force of the return spring 304c always points to the external boss 304b from the exhaust valve body 302, the elastic forces of the two return springs 304c are balanced in the initial state, the external boss 304b is positioned in the middle of the exhaust valve body 302, the abutting flat groove 304a is kept to connect the exhaust inlet 303a with the exhaust outlet 303b, the exhaust valve body 302 is connected, the exhaust valve core 304 slides leftwards/rightwards by overcoming the elastic force of the return spring 304c, the abutting flat groove 304a is staggered with the exhaust inlet 303a and the exhaust outlet 303b, and the exhaust valve body 302 is.

The exhaust valve 300 firstly discharges part of the compressed gas inside the left air chamber 124/the right air chamber 125, then switches to the closed state and discharges the rest part of the gas into the alternative valve actuating mechanism 400 for automatic triggering of the alternative valve actuating mechanism 400, therefore, the exhaust valve 300 needs to be switched to the closed state before the active piston 122 slides to the left end point/the right end point of the cylinder 121, for this reason, a rectangular connecting plate 305a with the length direction parallel to the axial direction of the reciprocating rod 123 is fixedly arranged on the side surface of the cylinder 121 close to the external boss 304b, the middle position of the connecting plate 305a along the length direction is fixedly connected with the external boss 304b, a triggering plate 305b extending towards the cylinder 121 is fixedly arranged on the end of the connecting plate 305b along the length direction, the distance between the two triggering plates 305b is smaller than the distance of the left-right movement of the active piston 122, a linkage frame 307 is fixedly arranged on the end position of the reciprocating rod 123, a triggering lug 308 is fixedly arranged on the linkage frame 307, and the triggering lug 308 is positioned on the middle position of the two triggering plates 305b in the initial state, the left-right sliding of the triggering plate 305b, thereby driving the exhaust valve core 300 to move to the left, and drive the exhaust valve 300.

As a more optimized scheme of the present invention, in order to avoid the trigger bump 308 from causing collision damage to the trigger plate 305b, a buffer assembly is disposed on the trigger plate 305b, the buffer assembly includes a buffer guide rod 306 penetrating through the trigger plate 305b and parallel to the axial direction of the reciprocating rod 123, the buffer guide rod 306 and the trigger plate 305b form a sliding guide fit along the axial direction parallel to the reciprocating rod 123, in order to avoid the buffer guide rod 306 and the trigger plate 305b from falling off, the ends of the buffer guide rods 306, which are far away from each other, are coaxially disposed with a bolt 306a forming a threaded connection fit therewith, the diameter of the bolt 306a is greater than that of the buffer guide rod 306, the ends of the buffer guide rods 306, which are close to each other, are coaxially disposed with a circular table 306b, the diameter of the circular table 306b is greater than that of the buffer guide rod 306b, a buffer spring 306c is movably sleeved outside the buffer guide rod 306c end and the circular table 306b, the other end and the trigger plate 305b, and the spring force of the buffer spring 306c always collides with the trigger plate 305b, so that the trigger bump 305b and the trigger plate 305b are directly damaged by the trigger bump, the trigger.

During operation, the exhaust valve 300 exhausts the left air chamber 124, the driving piston 122 slides to the left and drives the reciprocating rod 123 to move synchronously, air inside the left air chamber 124 is compressed and enters the docking guide tube 309 connected with the left one-way valve , then, the compressed air is exhausted to the air through the exhaust inlet 303a, the communication flat groove 304a and the exhaust outlet 303b in sequence, before the driving piston 122 moves to the left end point, the trigger lug 308 collides with the circular table 306b by overcoming the elastic force of the buffer spring 306c and drives the trigger plate 305b to move to the left, the trigger plate 305b drives the exhaust valve core 304 to move to the left synchronously and stagger the communication flat groove 304a with the exhaust inlet 303a and the exhaust outlet 303b, the exhaust valve 300 is automatically switched to the closed state, and then, the compressed air of the left air chamber 124 enters the alternative air distribution mechanism 400 during the process that the driving piston 122 moves to the left end point, and the alternative air distribution mechanism 400 automatically triggers the air distribution valve 130 to switch to the left air chamber 124, and the exhaust process of the right air chamber 125 is no longer performed to the exhaust air chamber .

In order to control the air distribution valve core 136 to slide to the end position of the air distribution valve cavity 132 leftwards/rightwards, the alternating air distribution mechanism 400 is provided with two parts, wherein the alternating air distribution mechanism 400 is arranged between the docking guide tube positioned on the left side and the right end of the air distribution valve cavity 132, another the alternating matching mechanism 400 is arranged between the docking guide tube positioned on the right side and the left end of the air distribution valve cavity 132, the alternating air distribution mechanism 400 comprises a second one-way valve 401, a docking guide tube II 402 and an exhaust pipe 403 provided with a plurality of exhaust holes 404, the output end of the second one-way valve 401 is communicated with the left end/right end of the exhaust valve cavity 132, the input end of the docking guide tube II 402 is communicated with the docking guide tube , the output end of the docking guide tube II 402 is communicated with the input end of the second one-way valve 401, the structure, size and shape of the second one-way valve 401 are completely identical to those of the one-way valve 140, the input end of the outer exhaust pipe 403 is communicated with the inner cavity of.

During operation of the alternative valve mechanism 400, when the gas distribution valve core 136 is located at the left end of the gas distribution valve cavity 132, the gas distribution valve 130 distributes gas to the left gas chamber inlet 124, the right gas chamber 125 is compressed and the compressed gas is firstly discharged outwards by the gas discharge valve 300, when the gas discharge valve 300 is switched to the closed state, the compressed gas is discharged to the docking guide 402, the second one-way valve 401 located at the left side is automatically conducted by gas pressure and enables the compressed gas to enter the left end of the gas distribution valve cavity 132, the gas distribution valve core 136 is pushed to slide rightwards along the gas distribution valve cavity 132, when the gas distribution valve core 136 slides to the right end of the gas distribution valve cavity 132, the gas distribution valve 130 conducts gas to the right gas chamber 125, the left gas chamber 124 is compressed and enables the compressed gas to be firstly discharged outwards by the gas discharge valve 300, when the gas discharge valve 300 is switched to the closed state, the compressed gas is discharged to the docking guide 402, the second one-way valve 401 located at the right side is automatically conducted by gas pressure and enables the compressed gas distribution valve core 136 to enter the right end of the gas distribution valve cavity 132, and enables the gas distribution valve core 136 to slide leftwards along the gas distribution valve cavity 132, and the gas distribution valve core 130 and the gas distribution valve core 132, so that the gas distribution valve core 124 performs gas distribution.