阅读说明：本技术 一种基于排气回收的气动集成系统及其控制方法 (Pneumatic integrated system based on exhaust recovery and control method thereof ) 是由 虞启辉 翟建伟 谭心 蒙建国 于 2019-12-02 设计创作，主要内容包括：本发明涉及一种基于排气回收的气动集成系统及其控制方法,基于排气回收的气动集成系统包括气缸,在该气缸上设置有与无杆腔连通的第一气孔,和与有杆腔连通的第二气孔；气罐,与气缸可拆卸固定连接,在气罐的外侧安装有气动模块和回收模块,气动模块的一端与气源连接,另一端与第一气孔和第二气孔连接,用于驱动气缸的活塞杆做伸缩运动,回收模块的一端与气罐的内部连通,另一端与所述气缸的内部连通,用于回收所述气缸内排出的气体；在所述气罐的罐壁内部设置有气路连接结构,该气路连接结构在所述气罐的外侧形成有若干接口,所述气缸、气动模块、回收模块和气源分别与相应的接口连接。本发明可以减小气动系统的空间占比同时便于移动。(The invention relates to a pneumatic integrated system based on exhaust recovery and a control method thereof, wherein the pneumatic integrated system based on exhaust recovery comprises a cylinder, wherein a first air hole communicated with a rodless cavity and a second air hole communicated with a rod cavity are formed in the cylinder; the gas tank is detachably and fixedly connected with the cylinder, a pneumatic module and a recovery module are installed on the outer side of the gas tank, one end of the pneumatic module is connected with a gas source, the other end of the pneumatic module is connected with the first gas hole and the second gas hole and used for driving a piston rod of the cylinder to do telescopic motion, one end of the recovery module is communicated with the inside of the gas tank, and the other end of the recovery module is communicated with the inside of the cylinder and used for recovering gas exhausted from the cylinder; the gas tank is characterized in that a gas path connecting structure is arranged in the tank wall of the gas tank, a plurality of interfaces are formed on the outer side of the gas tank through the gas path connecting structure, and the cylinder, the pneumatic module, the recovery module and the gas source are respectively connected with the corresponding interfaces. The invention can reduce the space ratio of the pneumatic system and is convenient to move.)

1. A pneumatically integrated system based on exhaust gas recovery, comprising:

the cylinder is provided with a first air hole communicated with the rodless cavity of the cylinder and a second air hole communicated with the rod cavity of the cylinder;

the air tank is detachably and fixedly connected with the air cylinder, a pneumatic module and a recovery module are installed on the outer side of the air tank, one end of the pneumatic module is connected with an air source, the other end of the pneumatic module is connected with the first air hole and the second air hole and used for driving a piston rod of the air cylinder to do telescopic motion, one end of the recovery module is communicated with the inside of the air tank, and the other end of the recovery module is communicated with the inside of the air cylinder and used for recovering air exhausted from the air cylinder;

the gas tank is characterized in that a gas path connecting structure is arranged in the tank wall of the gas tank, a plurality of interfaces are formed on the outer side of the gas tank through the gas path connecting structure, and the cylinder, the pneumatic module, the recovery module and the gas source are respectively connected with the corresponding interfaces.

2. The exhaust gas recovery-based pneumatic integrated system according to claim 1, wherein:

the gas tank comprises a tank body with two open ends, and the two open ends of the tank body are respectively provided with a first end cover and a second end cover;

the gas circuit connecting structure comprises a first flow channel, a second flow channel and a third flow channel, wherein the first flow channel and the second flow channel are arranged in the first end cover, the third flow channel is arranged on the second end cover, the first flow channel is communicated with the second air hole, the second flow channel is communicated with the inside of the tank body, and the third flow channel is communicated with the first air hole.

3. The exhaust gas recovery-based pneumatic integrated system according to claim 2, wherein:

and a fourth flow passage communicated with the air source is also arranged on the second end cover.

4. A pneumatic integrated system based on exhaust gas recovery according to claim 3, wherein:

the pneumatic module comprises a pressure reducing valve, a first electromagnetic valve and a second electromagnetic valve which are arranged on the outer side of the tank body, the first electromagnetic valve and the second electromagnetic valve are two-position three-way valves, and valve ports of the pressure reducing valve, the first electromagnetic valve and the second electromagnetic valve are respectively connected with corresponding interfaces on the gas tank;

the gas circuit connecting structure further comprises a plurality of pneumatic flow channels arranged inside the side wall of the tank body, so that the inlet end of the pressure reducing valve is communicated with the fourth flow channel, the outlet end of the pressure reducing valve is communicated with the P ports of the first electromagnetic valve and the second electromagnetic valve, and the A ports of the first electromagnetic valve and the second electromagnetic valve are respectively communicated with the first flow channel and the third flow channel.

5. The pneumatic integrated system based on exhaust gas recovery as set forth in claim 4, wherein:

the recovery module comprises a third electromagnetic valve and a one-way valve which are arranged on the outer side of the tank body, the third electromagnetic valve is a two-position three-way valve, and valve ports of the third electromagnetic valve and the one-way valve are respectively connected with corresponding interfaces on the gas tank;

the gas circuit connecting structure further comprises a plurality of recovery flow channels arranged inside the side wall of the tank body, so that a port P of the third electromagnetic valve is communicated with a port R of the second electromagnetic valve, a port A of the third electromagnetic valve is communicated with an inlet end of the one-way valve, and an outlet end of the one-way valve is communicated with the second flow channel.

6. The pneumatic integrated system based on exhaust gas recovery as set forth in claim 5, wherein:

the recycling module further comprises a first pressure sensor and a second pressure sensor, the first pressure sensor and the second pressure sensor are respectively installed on the outer sides of the first end cover and the second end cover, the first pressure sensor is communicated with the second flow channel, and the second pressure sensor is communicated with the third flow channel.

7. The exhaust gas recovery-based pneumatic integrated system according to claim 6, wherein:

the pneumatic module further comprises a first silencer, the recovery module further comprises a second silencer, and the first silencer and the second silencer are both mounted on the outer side of the tank body;

the gas circuit connecting structure further comprises a plurality of exhaust flow channels arranged inside the side wall of the tank body, so that the first silencer is communicated with the R port of the first electromagnetic valve, and the second silencer is communicated with the R port of the third electromagnetic valve.

8. The exhaust gas recovery-based pneumatic integrated system according to claim 7, wherein:

the one-way valve, the third electromagnetic valve, the first electromagnetic valve, the second electromagnetic valve and the pressure reducing valve are sequentially arranged on the outer side of the tank body along the length direction of the tank body;

and be provided with between third solenoid valve and first solenoid valve first muffler and second muffler, first muffler and second muffler follow the width direction setting of jar body.

9. The exhaust gas recovery-based pneumatic integrated system according to claim 1, wherein:

the first end cover and the second end cover are respectively in bolted connection with corresponding end covers of the air cylinder, connecting lugs for bolted connection are arranged on the first end cover, the second end cover and the end covers of the air cylinder, an L-shaped connecting plate is arranged on the end covers of the air cylinder, and the connecting plate is far away from the air tank.

10. The control method of the exhaust gas recovery-based pneumatic integrated system according to claim 7, wherein:

the displacement sensor is arranged on a piston rod of the air cylinder, and the controller is arranged on the outer side of the air tank;

when the displacement sensor detects that the piston rod is located at the retraction position, the first electromagnetic valve is powered on, the second electromagnetic valve and the third electromagnetic valve are powered off, at the moment, a port P of the first electromagnetic valve is communicated with a port A, a port A of the second electromagnetic valve is communicated with a port R, and the piston rod extends outwards;

when the displacement sensor detects that the piston rod is located at the maximum extending position, the second electromagnetic valve is electrified, the first electromagnetic valve is powered off, at the moment, a port P of the second electromagnetic valve is communicated with a port A, a port A of the first electromagnetic valve is communicated with a port R, and the piston rod retracts inwards;

in the process that the piston rod retracts inwards, if the pressure detected by the first pressure sensor is greater than the pressure detected by the second pressure sensor, the third electromagnetic valve is powered off, and the port P and the port R of the third electromagnetic valve are communicated, so that the gas in the rodless cavity is exhausted to the outside through the second silencer; if the pressure detected by the first pressure sensor is smaller than the pressure value detected by the second pressure sensor, the third electromagnetic valve is electrified, and a port P of the third electromagnetic valve is communicated with a port A, so that the gas in the rodless cavity enters the gas tank.

Technical Field

The invention relates to the technical field of pneumatic integrated systems of cylinders, in particular to a pneumatic integrated system based on exhaust recovery and a control method thereof.

Background

The pneumatic technology takes compressed air as a working medium and an air compressor as a power source, and is one of important means for realizing production and automatic control. The pneumatic system has a series of advantages of simple structure, convenient operation, high efficiency, low cost, long service life and the like, and is widely applied to the fields of chemical industry, metallurgy, automobile manufacturing and the like.

Because the efficiency of the pneumatic system is low and is only 20%, people pay more and more attention to the energy-saving problem of the pneumatic system, and research a plurality of energy-saving methods, such as methods of recycling compressed air, converting the compressed air into energy of other forms for use, utilizing the expansion energy of air to do work to push a piston to move, and the like, although the utilization rate of the compressed air is improved to a certain extent, compared with the traditional loop, the utilization amount of components is increased, the space occupation of the system is increased, the replacement of the components is troublesome, the position of a pipeline can be changed every time of replacement, the condition of compressed gas leakage occurs, and the service life and the working efficiency of the pneumatic system are seriously influenced.

Disclosure of Invention

Aiming at the defects in the prior art, one of the technical problems to be solved by the invention is to provide a pneumatic integrated system based on exhaust recovery, so that the space occupation ratio of the pneumatic system is reduced and the pneumatic system is convenient to move; the second technical problem to be solved by the present invention is to provide a control method of a pneumatic integrated system based on exhaust gas recovery, so as to recover and store compressed air.

In order to solve one of the technical problems, the invention provides a pneumatic integrated system based on exhaust recovery, which comprises a cylinder, wherein a first air hole communicated with a rodless cavity of the cylinder and a second air hole communicated with a rod cavity of the cylinder are formed in the cylinder; the air tank is detachably and fixedly connected with the air cylinder, a pneumatic module and a recovery module are installed on the outer side of the air tank, one end of the pneumatic module is connected with an air source, the other end of the pneumatic module is connected with the first air hole and the second air hole and used for driving a piston rod of the air cylinder to do telescopic motion, one end of the recovery module is communicated with the inside of the air tank, and the other end of the recovery module is communicated with the inside of the air cylinder and used for recovering air exhausted from the air cylinder; the gas tank is characterized in that a gas path connecting structure is arranged in the tank wall of the gas tank, a plurality of interfaces are formed on the outer side of the gas tank through the gas path connecting structure, and the cylinder, the pneumatic module, the recovery module and the gas source are respectively connected with the corresponding interfaces.

In the invention, the flow channels of the compressed air are all hidden in the tank wall of the air tank, a connecting hose is not needed for conveying the air, and the pneumatic module and the recovery module are integrally arranged on the outer side of the air tank, so that the whole pneumatic system occupies a small space and is convenient to move; further, the gas path connection structure formed inside the tank wall is less likely to cause gas leakage than the connection hose.

Preferably, the gas tank comprises a tank body with two open ends, and the two open ends of the tank body are respectively provided with a first end cover and a second end cover; the gas circuit connecting structure comprises a first flow channel, a second flow channel and a third flow channel, wherein the first flow channel and the second flow channel are arranged in the first end cover, the third flow channel is arranged on the second end cover, the first flow channel is communicated with the second air hole, the second flow channel is communicated with the inside of the tank body, and the third flow channel is communicated with the first air hole.

Preferably, a fourth flow passage communicated with the air source is further arranged on the second end cover.

Preferably, the pneumatic module comprises a pressure reducing valve, a first electromagnetic valve and a second electromagnetic valve which are arranged on the outer side of the tank body, the first electromagnetic valve and the second electromagnetic valve are both two-position three-way valves, and valve ports of the pressure reducing valve, the first electromagnetic valve and the second electromagnetic valve are respectively connected with corresponding interfaces on the gas tank; the gas circuit connecting structure further comprises a plurality of pneumatic flow channels arranged inside the side wall of the tank body, so that the inlet end of the pressure reducing valve is communicated with the fourth flow channel, the outlet end of the pressure reducing valve is communicated with the P ports of the first electromagnetic valve and the second electromagnetic valve, and the A ports of the first electromagnetic valve and the second electromagnetic valve are respectively communicated with the first flow channel and the third flow channel.

Preferably, the recovery module comprises a third electromagnetic valve and a one-way valve which are installed outside the tank body, the third electromagnetic valve is a two-position three-way valve, and valve ports of the third electromagnetic valve and the one-way valve are respectively connected with corresponding interfaces on the gas tank; the gas circuit connecting structure further comprises a plurality of recovery flow channels arranged inside the side wall of the tank body, so that a port P of the third electromagnetic valve is communicated with a port R of the second electromagnetic valve, a port A of the third electromagnetic valve is communicated with an inlet end of the one-way valve, and an outlet end of the one-way valve is communicated with the second flow channel.

Preferably, the recovery module further comprises a first pressure sensor and a second pressure sensor, the first pressure sensor and the second pressure sensor are respectively installed at the outer sides of the first end cover and the second end cover, the first pressure sensor is communicated with the second flow passage, and the second pressure sensor is communicated with the third flow passage.

Preferably, the pneumatic module further comprises a first silencer, the recovery module further comprises a second silencer, and the first silencer and the second silencer are both mounted on the outer side of the tank body; the gas circuit connecting structure further comprises a plurality of exhaust flow channels arranged inside the side wall of the tank body, so that the first silencer is communicated with the R port of the first electromagnetic valve, and the second silencer is communicated with the R port of the third electromagnetic valve.

Preferably, the one-way valve, the third electromagnetic valve, the first electromagnetic valve, the second electromagnetic valve and the pressure reducing valve are sequentially arranged on the outer side of the tank body along the length direction of the tank body; and be provided with between third solenoid valve and first solenoid valve first muffler and second muffler, first muffler and second muffler follow the width direction setting of jar body. By adopting the design structure, the arrangement of each component on the gas tank can be more reasonable and more tidy and beautiful.

Preferably, the first end cover and the second end cover are respectively in bolted connection with corresponding end covers of the cylinder, connecting lugs for bolted connection are arranged on the first end cover, the second end cover and the end covers of the cylinder, an L-shaped connecting plate is arranged on the end cover of the cylinder, and the connecting plate is far away from the gas tank. After the cylinder and the gas tank are integrated, a connecting plate is additionally arranged to facilitate the installation of the cylinder.

In order to solve the second technical problem, the invention provides a control method of a pneumatic integrated system based on exhaust gas recovery, which comprises a displacement sensor arranged on a piston rod of a cylinder and a controller arranged outside a gas tank; when the displacement sensor detects that the piston rod is located at the retraction position, the first electromagnetic valve is powered on, the second electromagnetic valve and the third electromagnetic valve are powered off, at the moment, a port P of the first electromagnetic valve is communicated with a port A, a port A of the second electromagnetic valve is communicated with a port R, and the piston rod extends outwards; when the displacement sensor detects that the piston rod is located at the maximum extending position, the second electromagnetic valve is electrified, the first electromagnetic valve is powered off, at the moment, a port P of the second electromagnetic valve is communicated with a port A, a port A of the first electromagnetic valve is communicated with a port R, and the piston rod retracts inwards; in the process that the piston rod retracts inwards, if the pressure detected by the first pressure sensor is greater than the pressure detected by the second pressure sensor, the third electromagnetic valve is powered off, and the port P and the port R of the third electromagnetic valve are communicated, so that the gas in the rodless cavity is exhausted to the outside through the second silencer; if the pressure detected by the first pressure sensor is smaller than the pressure value detected by the second pressure sensor, the third electromagnetic valve is electrified, and a port P of the third electromagnetic valve is communicated with a port A, so that the gas in the rodless cavity enters the gas tank.

By adopting the control method, when the piston rod retracts, if the pressure in the rodless cavity is greater than the pressure in the gas tank, the gas in the rodless cavity can be recycled by the gas tank, so that the gas tank is full of gas, if the pressure in the rodless cavity is less than the pressure in the gas tank, the gas tank is full of gas, and at the moment, the gas in the rodless cavity is discharged to the outside.

Drawings

In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a schematic structural diagram of a pneumatic integrated system based on exhaust gas recovery according to an embodiment of the present invention;

FIG. 2 is an exploded view of a pneumatically integrated system based on exhaust recovery in accordance with an embodiment of the present invention;

FIG. 3 is a schematic three-dimensional structure of a first end cap according to an embodiment of the invention;

FIG. 4 is a schematic two-dimensional structure of a first end cap according to an embodiment of the invention;

FIG. 5 is a schematic three-dimensional structure of a second end cap according to an embodiment of the invention;

FIG. 6 is a schematic two-dimensional structure of a second end cap according to an embodiment of the invention;

FIG. 7 is a schematic view of a tank connection structure with a pneumatic module and a recovery module according to an embodiment of the present invention;

FIG. 8 is a schematic structural diagram of a pressure reducing valve, a first solenoid valve, a second solenoid valve, a third solenoid valve and a check valve according to an embodiment of the present invention;

fig. 9 is a gas path diagram of a pneumatic integrated system based on exhaust gas recovery according to an embodiment of the present invention.

Reference numerals:

1-a cylinder; 2-a gas tank; 3-a pneumatic module; 4-a recovery module; 5-gas source; 6-gas path connecting structure; 7-a controller;

11-a first air hole; 12-a second air vent; 13-a connecting plate; 21-tank body; 22-a first end cap; 23-a second end cap; 31-a pressure reducing valve; 32-a first solenoid valve; 33-a second solenoid valve; 34-a first muffler; 41-a third solenoid valve; 42-a one-way valve; 43-a first pressure sensor; 44-a second pressure sensor; 45-a second muffler; 51-gas supply connection; 61-a first flow channel; 62-a second flow channel; 63-a third flow channel; 64-a fourth flow channel; 65-pneumatic flow channel; 66-a recovery flow channel; 67-exhaust flow path.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

As shown in fig. 1, 2, 3, 4, 5, 6, 7, 8 and 9, the present embodiment discloses a pneumatic integrated system based on exhaust gas recovery, which includes a cylinder 1 and a gas tank 2 for recovering compressed air, a first gas hole 11 communicated with a rodless cavity of the cylinder 1 and a second gas hole 12 communicated with a rod cavity of the cylinder are provided on the cylinder 1, the gas tank 2 is detachably and fixedly connected with the cylinder 1 through a bolt, a pneumatic module 3 and a recovery module 4 are installed on the outer side of the gas tank 2, one end of the pneumatic module 3 is connected with a gas source 5, the other end is connected with the first gas hole 11 and the second gas hole 12 for driving a piston rod of the cylinder to make telescopic motion, one end of the recovery module 4 is communicated with the inside of the gas tank 2, and the other end is communicated with the inside of the cylinder 1 for recovering gas exhausted from the cylinder 1; the gas circuit connecting structure 6 is arranged in the tank wall of the gas tank 2, a plurality of interfaces are formed on the outer side of the gas tank 2 by the gas circuit connecting structure 6, and the cylinder 4, the pneumatic module 6, the recovery module 4 and the gas source 5 are respectively connected with the corresponding interfaces.

Specifically, the gas tank 2 comprises a tank body 21 with two open ends, the two open ends of the tank body 21 are respectively provided with a first end cover 22 and a second end cover 23, the first end cover 22 and the second end cover 23 are both connected with the tank body 21 through bolts, and the joints are sealed through flat gaskets; the air path connecting structure 6 comprises a first flow passage 61 and a second flow passage 62 which are arranged inside the first end cover 22, and a third flow passage 63 and a fourth flow passage 64 which are arranged on the second end cover 23, wherein the first flow passage 61 is communicated with the second air hole 12, the second flow passage 62 is communicated with the inside of the tank body 21, the third flow passage 63 is communicated with the first air hole 11, and the fourth flow passage 64 is communicated with the air source 5.

The pneumatic module 3 is arranged on a pressure reducing valve 31, a first electromagnetic valve 32 and a second electromagnetic valve 33 on the outer side of the tank 21, the first electromagnetic valve 32 and the second electromagnetic valve 33 are both two-position three-way valves, and the valve ports of the pressure reducing valve 31, the first electromagnetic valve 32 and the second electromagnetic valve 33 are respectively connected with corresponding interfaces on the gas tank 2; the air path connecting structure 6 further includes a plurality of pneumatic flow channels 65 disposed inside the sidewall of the tank 21, such that an inlet end of the pressure reducing valve 31 is communicated with the fourth flow channel 64, an outlet end of the pressure reducing valve 31 is communicated with P ports of the first solenoid valve 32 and the second solenoid valve 33, and a port a of the first solenoid valve 32 and the second solenoid valve 33 is communicated with the first flow channel 61 and the third flow channel 63, respectively.

The recovery module 4 comprises a third electromagnetic valve 41 and a one-way valve 42 which are installed outside the tank 21, and further comprises a first pressure sensor 43 and a second pressure sensor 44 which are installed on the first end cover 22 and the second end cover 23 respectively, wherein the third electromagnetic valve 41 is a two-position three-way valve, the valve ports of the third electromagnetic valve 41 and the one-way valve 42 are connected with corresponding interfaces on the gas tank 2 respectively, the first pressure sensor 43 is communicated with the second flow channel 23 and is used for monitoring the pressure inside the gas tank 2, and the second pressure sensor 44 is communicated with the third flow channel 63 and is used for monitoring the pressure in the rodless cavity of the cylinder 1; the air path connecting structure 6 further includes a plurality of recovery flow channels 66 disposed inside the side wall of the tank 21, so that the port P of the third electromagnetic valve 41 is communicated with the port R of the second electromagnetic valve 33, the port a of the third electromagnetic valve 41 is communicated with the inlet end of the check valve 42, and the outlet end of the check valve 42 is communicated with the second flow channel 62.

The pneumatic module 3 further comprises a first silencer 34, the recovery module 4 further comprises a second silencer 45, the first silencer 34 and the second silencer 45 are both mounted on the outer side of the tank body 21, and the air path connecting structure 6 further comprises a plurality of exhaust flow passages 67 arranged inside the side wall of the tank body, so that the first silencer 34 is communicated with the R port of the first electromagnetic valve 32, and the second silencer 45 is communicated with the R port of the third electromagnetic valve 41.

In this embodiment, during retraction of the piston rod of the cylinder 1, the first solenoid valve 32 is energized, the port P thereof communicates with the port a, the second solenoid valve 33 is de-energized, the port A is communicated with the port R, compressed air of the air source 5 enters a rod cavity of the air cylinder 1 from the first flow passage 61 through the pressure reducing valve 31 and the first electromagnetic valve 32 to drive a piston rod of the air cylinder 1 to retract, at the same time, the first pressure sensor 43 and the second pressure sensor 44 monitor the pressure in the gas tank 2 and the rodless chamber in real time, if the pressure in the gas tank 2 is greater than the pressure in the rodless chamber, the third solenoid valve 41 is de-energized, the port P is communicated with the port R, the compressed air in the rodless chamber enters the port A of the second electromagnetic valve 33 from the third flow channel 63, and enters the port P of the third solenoid valve 41 from the port R of the second solenoid valve 33 through the recovery flow passage 66, and is discharged from the port R of the third solenoid valve 41 to the outside from the second muffler 45 through the exhaust flow passage 67; if the pressure in the gas tank 2 is lower than the pressure in the rodless chamber, the third solenoid valve 41 is energized, the port P communicates with the port a, and the compressed air in the rodless chamber enters the port P of the third solenoid valve 41 through the third flow channel 63 and the second solenoid valve 33, and enters the gas tank 2 from the port a of the third solenoid valve 41 through the check valve 42, thereby completing the recovery of the compressed air in the rodless chamber. In the process of extending the piston rod of the cylinder 1, the second electromagnetic valve 33 is powered on, the port P is communicated with the port a, the first electromagnetic valve 32 is powered off, the port a is communicated with the port R, the compressed air of the air source 5 enters the rodless cavity of the cylinder 1 from the third flow passage 63 through the pressure reducing valve 31 and the second electromagnetic valve 33, the piston rod of the cylinder 1 is driven to extend, and the compressed air in the rod cavity is exhausted from the first flow passage 61 to the outside from the first silencer 34 through the first electromagnetic valve 32.

Specifically, the first end cap 22 and the second end cap 23 are respectively bolted to corresponding end caps of the cylinder 1, and the first end cap 22, the second end cap 23 and the end caps of the cylinder 1 are respectively provided with a connecting lug for bolting, so that the cylinder 1 and the gas tank 2 are integrated into a whole, and in order to facilitate installation of the cylinder 1, the end cap of the cylinder 1 is provided with an L-shaped connecting plate 13, and the connecting plate 13 is arranged away from the gas tank 2.

Specifically, the check valve 42, the third electromagnetic valve 41, the first electromagnetic valve 32, the second electromagnetic valve 33, and the pressure reducing valve 31 are sequentially provided on the outer side of the tank 21 along the longitudinal direction thereof; the first muffler 34 and the second muffler 45 are provided between the third solenoid valve 41 and the first solenoid valve 32, and the first muffler 34 and the second muffler 45 are provided along the width direction of the tank 21. In this embodiment, in order to facilitate installation of each valve body, the bottom plates of the purchased check valve 42, third electromagnetic valve 41, first electromagnetic valve 32, second electromagnetic valve 33, and pressure reducing valve 31 are removed, the valve ports of each valve body are aligned with the corresponding ports on the gas tank 2, sealing rings are provided at the ports to prevent gas leakage, and then each valve body is installed on the gas tank 2 by using bolts (see fig. 8).

Referring to fig. 7, the tank 21 is provided with a plurality of ports corresponding to the respective valve bodies, wherein two ports corresponding to the check valve 42 are arranged up and down along the width direction of the tank 21, the upper port is communicated with the outlet end of the check valve 42, and the lower port is connected with the inlet end of the check valve 42; three interfaces corresponding to the third solenoid valve 41, the first solenoid valve 32 and the second solenoid valve 33 are all arranged up and down along the width direction of the tank body 21, wherein the three interfaces corresponding to the third solenoid valve 41 are respectively communicated with the port P, the port A and the port R of the third solenoid valve 41 from top to bottom, the three interfaces corresponding to the first solenoid valve 32 are respectively communicated with the port A, the port R and the port P of the first solenoid valve 32 from top to bottom, and the three interfaces corresponding to the second solenoid valve 33 are respectively communicated with the port P, the port A and the port R of the second solenoid valve 32 from top to bottom; two ports corresponding to the pressure reducing valve 31 are arranged up and down along the width direction of the tank 21, the upper port is communicated with the outlet end of the pressure reducing valve 31, and the lower port pressure reducing valve 31 is connected with the inlet end.

Further, in order to facilitate control of the pneumatic module 3 and the recovery module 4 of the cylinder 1, the present embodiment mounts a displacement sensor (not shown in the drawings) on a piston rod of the cylinder 1 for detecting an extended or retracted position of the piston rod, and mounts a controller 7 on the outside of the tank 21. The control method of the pneumatic integrated system based on exhaust gas recovery comprises the following steps: when the displacement sensor detects that the piston rod is located at the retraction position, the first electromagnetic valve 32 is powered on, the second electromagnetic valve 33 and the third electromagnetic valve 41 are powered off, at the moment, the port P of the first electromagnetic valve 32 is communicated with the port A, the port A of the second electromagnetic valve 33 is communicated with the port R, and the piston rod extends outwards; when the displacement sensor detects that the piston rod is located at the maximum extending position, the second electromagnetic valve 33 is powered on, the first electromagnetic valve 32 is powered off, at the moment, the port P of the second electromagnetic valve 33 is communicated with the port A, the port A of the first electromagnetic valve 32 is communicated with the port R, and the piston rod retracts inwards; in the process that the piston rod retracts inwards, if the pressure detected by the first pressure sensor 43 is greater than the pressure detected by the second pressure sensor 44, the third electromagnetic valve 41 is powered off, and the port P and the port R of the third electromagnetic valve 41 are communicated, so that the gas in the rodless cavity is discharged to the outside through the second silencer 45; if the pressure detected by the first pressure sensor 43 is lower than the pressure detected by the second pressure sensor 44, the third solenoid valve 41 is energized, and the port P of the third solenoid valve 41 communicates with the port a, so that the gas in the rodless chamber enters the gas tank 2.

In the invention, the flow channels of the compressed air are all hidden in the tank wall of the air tank 2, a connecting hose is not needed for conveying the air, and the pneumatic module 3 and the recovery module 4 are integrally arranged on the outer side of the air tank, so that the whole pneumatic system occupies a smaller space and is convenient to move; in addition, the gas path connecting structure 6 formed inside the wall of the gas tank 2 is less prone to gas leakage than a connecting hose, and in use, the gas source connector 51 is connected to the fourth flow path 64 so as to be connected to the gas source 5.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; these modifications and substitutions do not cause the essence of the corresponding technical solution to depart from the scope of the technical solution of the embodiments of the present invention, and are intended to be covered by the claims and the specification of the present invention.