阅读说明：本技术 一种气压打桩机 (Pneumatic pile driver ) 是由 刘继峰 于 2021-08-05 设计创作，主要内容包括：本发明提出了一种气压打桩机,涉及打桩机制造技术领域。一种气压打桩机,包括底座、气缸、第一筒体、第二筒体、第三筒体和打桩棒。气缸设置底座上,第一筒体罩设在气缸上,气缸的活塞杆能伸出第一筒体。第二筒体罩设在第一筒体上,第一筒体与第二筒体之间限定形成回气腔室。第三筒体罩设在第二筒体上,第二筒体与第三筒体之间限定形成供气腔室。回气腔室和供气腔室分别与气缸连通,底座下方设置有控制开关。控制开关用于控制回气腔室和供气腔室的启闭,打桩棒与活塞杆连接。供气腔室与回气腔室之间设置有多个自动供气泵,自动供气泵用于将回气腔室内的气体压入供气腔室。本发明具有利用气体打桩作业,耗能较小,占用空间小,工作效率高等优点。(The invention provides an air pressure pile driver, and relates to the technical field of pile driver manufacturing. The utility model provides a pneumatic pile driver, includes base, cylinder, first barrel, second barrel, third barrel and pile stick. The cylinder sets up on the base, and first barrel cover is established on the cylinder, and the piston rod of cylinder can stretch out first barrel. The second cylinder covers the first cylinder, and an air return chamber is defined between the first cylinder and the second cylinder. The third cylinder body covers the second cylinder body, and an air supply chamber is limited between the second cylinder body and the third cylinder body. The air return chamber and the air supply chamber are respectively communicated with the air cylinder, and a control switch is arranged below the base. The control switch is used for controlling the opening and closing of the air return chamber and the air supply chamber, and the piling rod is connected with the piston rod. And a plurality of automatic gas supply pumps are arranged between the gas supply chamber and the gas return chamber and are used for pressing gas in the gas return chamber into the gas supply chamber. The invention has the advantages of utilizing gas to pile, having smaller energy consumption, small occupied space, high working efficiency and the like.)

1. An air pressure pile driver is characterized by comprising a base, a bracket arranged on the base, an air cylinder, a first cylinder, a second cylinder, a third cylinder and a pile driving rod, the cylinder is arranged on the base, the first cylinder body is covered on the cylinder, a piston rod of the cylinder can extend out of the first cylinder body, the second cylinder body is covered on the first cylinder body, an air return chamber is limited between the first cylinder body and the second cylinder body, the third cylinder body is covered on the second cylinder body, an air supply chamber is limited between the second cylinder body and the third cylinder body, the air return chamber and the air supply chamber are respectively communicated with the air cylinder, a control switch is arranged below the base, the control switch is used for controlling the opening and closing of the air return chamber and the air supply chamber, and the piling rod is connected with the piston rod;

the air feed cavity with be provided with a plurality of automatic air feed pumps between the return air cavity, the import of automatic air feed pump with return air cavity intercommunication, the export of automatic air feed pump with air feed cavity intercommunication.

2. Pneumatic pile driver according to claim 1, characterised in that the control switch comprises an operation control comprising an outer tube and an inner tube, the inner tube being arranged within the outer tube, and can freely slide along the inner tube, the outer tube is provided with an air supply inlet hole, an air supply outlet hole and an air discharge outlet hole, the air supply inlet hole is communicated with the air supply chamber, the air supply outlet hole is communicated with the air cylinder, the exhaust hole is communicated with the air return chamber, the inner pipe is provided with a first hole, a second hole, a third hole and a fourth hole at intervals in sequence, a sealing plate is arranged in the inner tube and is positioned between the second hole and the third hole, after the inner pipe slides, the first hole can be coincided and communicated with the air supply inlet hole, and the second hole is coincided and communicated with the air supply outlet hole; the third hole can with air feed venthole coincidence intercommunication, the fourth hole can with discharge venthole coincidence intercommunication.

3. A pneumatic pile driver as claimed in claim 2, characterised in that one end of the inner tube extends beyond the outer tube, and that the end of the inner tube extending beyond the outer tube is connected to a connecting rod, the free end of which is connected to the pile driving rod.

4. The pneumatic pile driver of claim 1, wherein the automatic air feed pump includes a pump body having a cavity formed therein, a piston disposed in the cavity, and a drive rod connected to the piston for driving the piston along the cavity, the inlet and the outlet opening in the pump body, respectively, the inlet and the outlet opening in communication with the cavity, respectively.

5. Pneumatic pile driver according to claim 4, characterised in that a first one-way valve is arranged between the inlet and the gas supply chamber.

6. Pneumatic pile driver according to claim 4, characterised in that a second one-way valve is arranged between the outlet and the return air chamber.

7. Pneumatic pile driver according to claim 4, characterised in that the support is provided with a pulley, which is arranged on the support by means of a seat, which is slidably connected to the support, which is connected to the pile driving rod, and which is provided with a slide, which is slidably connected on one side to the pulley and on the other side to the driving rod.

8. The pneumatic pile driver of claim 7, wherein the support is symmetrically provided with two slideways, the two slideways are positioned on two sides of the third cylinder, and the plurality of automatic air supply pumps are symmetrically arranged along the two slideways.

9. The pneumatic pile driver as claimed in claim 7 or 8, wherein the slideway is of a folded structure, the driving rod is connected to an inflection point of the folded structure, a return spring is sleeved on the driving rod, one end of the return spring is connected with the pump body, and the other end of the return spring is connected with the folded structure.

10. The pneumatic pile driver of claim 1, wherein an external air feed pump is connected to the air feed chamber.

Technical Field

The invention relates to the technical field of pile driver manufacturing, in particular to an air pressure pile driver.

Background

The pile driver consists of a pile hammer, a pile frame, accessory equipment and the like. The pile hammer is attached between two parallel vertical guide rods (commonly called gantry) at the front part of the pile frame and is hoisted by a hoisting hook. The pile frame is a steel structure tower frame, and a winch is arranged at the rear part of the pile frame and used for hoisting the pile and the pile hammer. The front of the pile frame is provided with a guide frame consisting of two guide rods for controlling the piling direction so that the pile can accurately penetrate into the stratum according to the designed direction. The basic technical parameters of the pile driver are the impact section weight, the impact kinetic energy and the impact frequency. The existing pile driver is generally hydraulic equipment or other vibrating equipment to drive a pile hammer on a pile driving rod to act, and the existing pile driver is expensive in manufacturing cost, large in energy consumption, large in occupied space and low in working efficiency.

Disclosure of Invention

The invention aims to provide an air pressure pile driver, which has the advantages of small energy consumption, small occupied space, high working efficiency and the like by utilizing air pressure to carry out pile driving operation.

The embodiment of the invention is realized by the following steps:

the embodiment of the application provides an air pressure pile driver, which comprises a base, a support arranged on the base, an air cylinder, a first cylinder, a second cylinder, a third cylinder and a pile driving rod, wherein the air cylinder is arranged on the base, the first cylinder is covered on the air cylinder, a piston rod of the air cylinder can extend out of the first cylinder, the second cylinder is covered on the first cylinder, a return air chamber is limited between the first cylinder and the second cylinder, the third cylinder is covered on the second cylinder, an air supply chamber is limited between the second cylinder and the third cylinder, the return air chamber and the air supply chamber are respectively communicated with the air cylinder, a control switch is arranged below the base and used for controlling the opening and closing of the return air chamber and the air supply chamber, and the pile driving rod is connected with the piston rod;

a plurality of automatic air supply pumps are arranged between the air supply chamber and the air return chamber, the inlet of each automatic air supply pump is communicated with the air return chamber, and the outlet of each automatic air supply pump is communicated with the air supply chamber.

In some embodiments of the present invention, the control switch includes an operation controller, the operation controller includes an outer tube and an inner tube, the inner tube is disposed in the outer tube and can freely slide along the inner tube, the outer tube is provided with an air supply inlet hole, an air supply outlet hole and an air discharge hole, the air supply inlet hole is communicated with the air supply chamber, the air supply outlet hole is communicated with the air cylinder, the air discharge hole is communicated with the air return chamber, the inner tube is sequentially provided with a first hole, a second hole, a third hole and a fourth hole at intervals, a sealing plate is disposed in the inner tube, the sealing plate is disposed between the second hole and the third hole, after the inner tube slides, the first hole can be coincided and communicated with the air supply inlet hole, and the second hole is coincided and communicated with the air supply outlet hole; the third hole can be communicated with the air supply air outlet in a superposition mode, and the fourth hole can be communicated with the exhaust air outlet in a superposition mode.

In some embodiments of the invention, one end of the inner pipe extends out of the outer pipe, one end of the inner pipe extending out of the outer pipe is connected with a connecting rod, and the free end of the connecting rod is connected with the piling bar.

In some embodiments of the present invention, the automatic air supply pump includes a pump body, a piston, and a driving rod, wherein a cavity is formed in the pump body, the piston is disposed in the cavity, the driving rod is connected to the piston and is used for driving the piston to move along the cavity, an inlet and an outlet are respectively formed in the pump body, and the inlet and the outlet are respectively communicated with the cavity.

In some embodiments of the invention, a first one-way valve is disposed between the inlet and the gas supply chamber.

In some embodiments of the invention, a second one-way valve is disposed between the outlet and the air return chamber.

In some embodiments of the present invention, the support is provided with a pulley, the pulley is disposed on the support through a seat body, the seat body is slidably connected with the support, the seat body is connected with the piling rod, the support is provided with a slide way, one side of the slide way is slidably connected with the pulley, and the other side of the slide way is connected with the driving rod.

In some embodiments of the present invention, the support is symmetrically provided with two sliding ways, the two sliding ways are located on two sides of the third cylinder, and the plurality of automatic air supply pumps are symmetrically arranged along the two sliding ways.

In some embodiments of the present invention, the slide way is a folded structure, the driving rod is connected to an inflection point of the folded structure, a return spring is sleeved on the driving rod, one end of the return spring is connected to the pump body, and the other end of the return spring is connected to the folded structure.

In some embodiments of the invention, an external air supply pump is connected to the air supply chamber.

Compared with the prior art, the embodiment of the invention has at least the following advantages or beneficial effects:

the invention provides an air pressure pile driver which comprises a base, a support arranged on the base, an air cylinder, a first cylinder, a second cylinder, a third cylinder and a pile driving rod. The cylinder sets up on the base, and first barrel cover is established on the cylinder, and the piston rod of cylinder can stretch out first barrel. The second cylinder covers the first cylinder, and an air return chamber is defined between the first cylinder and the second cylinder. The third cylinder body covers the second cylinder body, and an air supply chamber is limited between the second cylinder body and the third cylinder body. The air return chamber and the air supply chamber are respectively communicated with the air cylinder, a control switch is arranged below the base and used for controlling the opening and closing of the air return chamber and the air supply chamber, and the piling rod is connected with the piston rod. The base is used for bearing the other components, the air cylinder is a main component for driving the piling rod, and the air cylinder can realize the reciprocating motion of the piling rod so as to realize piling. Above-mentioned first barrel is used for placeing the cylinder, can practice thrift the space. Meanwhile, an air supply chamber formed between the first cylinder and the second cylinder can supply air for the air cylinder to drive the air cylinder. Similarly, the air return chamber formed between the second cylinder and the third cylinder is used for returning air, so that the air in the cylinder is discharged into the air return chamber. The first cylinder, the second cylinder and the third cylinder are arranged, so that the volume of the air return chamber and the volume of the air supply chamber can be ensured, and the occupied area can be reduced. The control switch controls the air supply and air return of the air supply chamber and the air return chamber to the air cylinder. For example, when the piston rod of the cylinder needs to move in the direction of extending out of the cylinder to drive the pile hammer on the pile driving rod to lift, the control switch controls the air supply chamber to be communicated with the cylinder and controls the air return chamber to be closed with the cylinder, and at the moment, air in the air supply chamber enters the cylinder under certain pressure, so that the piston rod of the cylinder is driven to move. Similarly, when the pile hammer needs to move in the opposite direction, the control switch controls the air return chamber to be communicated with the air cylinder and controls the air supply chamber and the air cylinder to be closed, at the moment, the pile hammer moves in the opposite direction under the action of gravity, and air in the air cylinder enters the air return chamber in the movement process, so that the pile driving action can be realized in a reciprocating mode. A plurality of automatic air supply pumps are arranged between the air supply chamber and the air return chamber, the inlet of each automatic air supply pump is communicated with the air return chamber, and the outlet of each automatic air supply pump is communicated with the air supply chamber. The automatic gas supply pump is used for continuously pressing gas in the gas return cavity into the gas supply cavity, so that the gas can be recycled, and the piling efficiency is increased while the energy consumption is reduced.

Therefore, the air pressure pile driver has the advantages of utilizing air pressure to carry out pile driving operation, being small in energy consumption, small in occupied space, high in working efficiency and the like.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is an enlarged view taken at A in FIG. 1;

FIG. 3 is a schematic diagram of the operation controller in a gas supply state according to the embodiment of the present invention;

fig. 4 is a schematic structural diagram of the operation controller in the air return state according to the embodiment of the present invention.

Icon: 1-external air supply pump, 2-bracket, 3-seat, 4-pulley, 5-connecting block, 6-pile driving rod, 7-third cylinder, 8-second cylinder, 9-first cylinder, 10-cylinder, 11-piston rod, 12-air return chamber, 13-air supply chamber, 14-connecting rod, 15-automatic air supply pump, 151-pump body, 152-piston, 153-driving rod, 16-slideway, 17-operation controller, 171-outer tube, 1711-air supply inlet hole, 1712-air discharge hole, 1713-air supply outlet hole, 172-inner tube, 1721-first hole, 1722-second hole, 1723-third hole, 1724-fourth hole, 18-base, 19-second one-way valve, 20-first one-way valve, 21-return spring.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the embodiments of the present invention, it should be noted that, if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or the orientations or positional relationships that the products of the present invention are usually placed in when used, the orientations or positional relationships are only used for convenience of describing the present invention and simplifying the description, but the terms do not indicate or imply that the devices or elements indicated must have specific orientations, be constructed in specific orientations, and operate, and therefore, should not be construed as limiting the present invention. Furthermore, the appearances of the terms "first," "second," "third," and the like, if any, are only used to distinguish one description from another, and are not to be construed as indicating or implying relative importance.

Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not require that the components be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.

In the description of the embodiments of the present invention, "plurality" if any, means at least 2.

In the description of the embodiments of the present invention, it should be further noted that unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Examples

Referring to fig. 1, fig. 1 is a schematic structural diagram of an embodiment of the present invention, and this embodiment provides a pneumatic pile driver, which includes a base 18, a bracket 2 disposed on the base 18, a cylinder 10, a first cylinder 9, a second cylinder 8, a third cylinder 7, and a pile driving rod 6. The cylinder 10 is arranged on the base 18, the first cylinder 9 is covered on the cylinder 10, and the piston rod 11 of the cylinder 10 can extend out of the first cylinder 9. The second cylinder 8 is covered on the first cylinder 9, and an air return chamber 12 is defined between the first cylinder 9 and the second cylinder 8. The third cylinder 7 is covered on the second cylinder 8, and a gas supply chamber 13 is defined between the second cylinder 8 and the third cylinder 7. The base 18 is used for carrying the other components, the air cylinder 10 is the main component for driving the piling bar 6, and the air cylinder 10 can realize the reciprocating motion of the piling bar 6 so as to realize piling. The first cylinder 9 is used for placing the cylinder 10, so that the space can be saved.

Meanwhile, the air supply chamber 13 formed between the first cylinder 9 and the second cylinder 8 supplies air to the air cylinder 10 to drive the air cylinder 10. Similarly, the return air chamber 12 formed between the second cylinder 8 and the third cylinder 7 is used for return air, so that the air in the cylinder 10 is discharged into the return air chamber 12. The arrangement of the first cylinder 9, the second cylinder 8 and the third cylinder 7 can reduce the occupied area while ensuring the volumes of the air return chamber 12 and the air supply chamber 13.

In this embodiment, the air return chamber 12 and the air supply chamber 13 are respectively communicated with the cylinder 10, a control switch is arranged below the base 18 and used for controlling the opening and closing of the air return chamber 12 and the air supply chamber 13, and the piling bar 6 is connected with the piston rod 11. The control switches control the supply and return of air to the cylinder 10 from the air supply chamber 13 and the air return chamber 12.

For example, when the piston rod 11 of the cylinder 10 needs to move in a direction extending out of the cylinder 10 to drive the pile hammer on the pile driving rod 6 to lift, the control switch controls the air supply chamber 13 to communicate with the cylinder 10 and controls the air return chamber 12 to close the cylinder 10, and at this time, the air in the air supply chamber 13 enters the cylinder 10 under a certain pressure, thereby driving the piston rod 11 of the cylinder 10 to move. Similarly, when the pile hammer needs to move in the opposite direction, the control switch controls the air return chamber 12 to be communicated with the cylinder 10 and controls the air supply chamber 13 to be closed with the cylinder 10, at the moment, the pile hammer moves in the opposite direction under the action of gravity, and air in the cylinder 10 enters the air return chamber 12 during the movement process, so that the pile driving action can be realized in a reciprocating mode.

In this embodiment, a plurality of automatic air feed pumps 15 are provided between the air feed chamber 13 and the air return chamber 12, an inlet of the automatic air feed pump 15 communicates with the air return chamber 12, and an outlet of the automatic air feed pump 15 communicates with the air feed chamber 13. The automatic air supply pump 15 is used to continuously press the air in the air return chamber 12 into the air supply chamber 13, thereby realizing the recycling of the air, reducing the energy consumption and increasing the piling efficiency. The arrangement of the automatic gas supply pumps 15 can enable gas in the gas return chamber 12 to be uniformly pressed into the gas supply chamber 13, so that the problems that the automatic gas supply pumps 15 are overloaded, the energy consumption of the automatic gas supply pumps 15 is increased, the working efficiency of the pressed gas is low and the like due to the fact that the pressure of the pressed gas is too high at the automatic gas supply pumps 15 are avoided.

Therefore, the air pressure pile driver has the advantages of utilizing air pressure to carry out pile driving operation, being small in energy consumption, small in occupied space, high in working efficiency and the like.

Referring to fig. 3 and 4, in some embodiments of the present embodiment, the control switch includes an operation controller 17, the operation controller 17 includes an outer tube 171 and an inner tube 172, the inner tube 172 is disposed in the outer tube 171 and can slide freely along the inner tube 172, the outer tube 171 is formed with an air supply inlet hole 1711, an air supply outlet hole 1713, and an air discharge hole 1712, the air supply inlet hole 1711 is communicated with the air supply chamber 13, the air supply outlet hole 1713 is communicated with the cylinder 10, the air discharge outlet hole 1712 is communicated with the air return chamber 12, the inner tube 172 is sequentially formed with a first hole 1721, a second hole 1722, a third hole 1723, and a fourth hole 1724 at intervals, a sealing plate is disposed in the inner tube 172 and located between the second hole 1722 and the third hole 1723, after the inner tube 172 slides, the first hole 1721 can be overlapped with the air supply inlet hole 1711, the second hole 1722 is overlapped and communicated with the air supply and outlet hole 1713; the third hole 1723 may be overlapped and communicated with the air supply/discharge hole 1713, and the fourth hole 1724 may be overlapped and communicated with the discharge hole 1712.

Referring to fig. 3, in the present embodiment, the inner tube 172 slides freely on the outer tube 171, and during the sliding process of the inner tube 172, the first hole 1721 is overlapped and communicated with the air inlet hole 1711, and the air outlet hole 1713 is overlapped and communicated with the second hole 1722. At this time, the cylinder 10 is in a gas supply state, the gas in the gas supply chamber 13 enters the inner tube 172 along the first hole 1721, and at this time, the third hole 1723 is not communicated with the discharge hole 1712, and the fourth hole 1724 is not communicated with the return chamber 12. Since the sealing plate separates the inner tube 172 corresponding to the first hole 1721 and the second hole 1722 from the inner tube 172 corresponding to the third hole 1723 and the fourth hole 1724, the gas introduced into the inner tube 172 enters the second hole 1722 along the inner tube 172 and enters the cylinder 10 along the gas supply/discharge hole 1713, thereby driving the cylinder 10 to operate.

Referring to fig. 4, similarly, when the inner tube 172 is slid, the third hole 1723 can be communicated with the exhaust hole 1712, the fourth hole 1724 can be communicated with the air return chamber 12, the first hole 1721 is not overlapped and communicated with the air supply inlet hole 1711, and the air supply outlet hole 1713 is not overlapped and communicated with the second hole 1722. At this time, the cylinder 10 is in a gas return state, and gas in the cylinder 10 can enter the section of the inner tube 172 located at the third hole 1723 and the fourth hole 1724 in the inner tube 172 along the exhaust hole 1712, and then enter the section along the fourth hole 1724 to enter the gas return chamber 12 for recycling. The inner tube 172 repeats the above state during the reciprocating motion, so that the cylinder 10 drives the piston rod 11 of the cylinder 10 to drive the pile driving rod 6 to reciprocate, thereby driving the pile hammer to reciprocate for pile driving.

Referring to fig. 1, in some embodiments of the present invention, one end of the inner tube 172 extends out of the outer tube 171, one end of the inner tube 172 extending out of the outer tube 171 is connected to a connecting rod 14, and a free end of the connecting rod 14 is connected to the pile driving rod 6.

In this embodiment, the connecting rod 14 connected to one end of the inner tube 172 extending out of the outer appearance is used to drive the inner tube 172 to reciprocate, one end of the connecting rod 14 is connected to the extending end of the inner tube 172, and the other end is connected to the pile driving rod 6, and the pile driving rod 6 drives the connecting rod 14 to reciprocate during reciprocating motion, so that the connecting rod 14 can drive the inner tube 172 to automatically reciprocate. Specifically, the free end of the connecting rod 14 is disposed below the pulley 4, and the pulley 4 drives the free end of the connecting rod 14 to move.

Referring to fig. 2, in some embodiments of the present invention, the automatic feed air pump 15 includes a pump body 151, a piston 152, and a driving rod 153. The pump body 151 has a cavity therein, the piston 152 is disposed in the cavity, and the driving rod 153 is connected to the piston 152 for driving the piston 152 to move along the cavity. The inlet and the outlet are respectively formed in the pump body 151, and the inlet and the outlet are respectively communicated with the cavity.

In the present embodiment, the automatic air feed pump 15 is mainly used to press the air recovered in the return air chamber 12 into the air feed chamber 13. The drive rod 153 moves the piston 152, and the piston 152 moves in the cavity of the pump body 151, thereby opening the outlet, closing the inlet, and compressing the gas to allow the gas to enter the gas supply chamber along the outlet. Similarly, the driving rod 153 drives the piston rod 11 to move in the opposite direction, and after the piston 152 moves in the cavity of the pump body 151 in the opposite direction, the air in the air expands to form an internal and external pressure difference with the air supply chamber 13, at this time, the outlet is closed, and when the inlet is opened, the air in the air return chamber 12 automatically enters the cavity under the action of the pressure difference. By repeating the above operation, the gas in the gas return chamber 12 can be continuously pressed into the gas supply chamber 13.

Referring to fig. 2, in some embodiments of the present invention, a first check valve 20 is disposed between the inlet and the air supply chamber 13.

In this embodiment, the first check valve 20 can only allow gas to enter the gas supply chamber 13 from the cavity, and prevent the gas in the gas supply chamber 13 from entering the cavity under a certain pressure. Specifically, the first check valve 20 is a gas path check valve, and when the gas pressure in the cavity is greater than the pressure in the gas supply chamber 13, the gas path check valve is opened; when the pressure of the gas in the cavity is lower than the pressure in the gas supply chamber 13, the gas path check valve is closed.

Referring to fig. 2, in some embodiments of the present invention, a second one-way valve 19 is disposed between the outlet and the air return chamber.

In the present embodiment, the second check valve 19 functions in the same manner as the first check valve 20, and is a gas passage check valve. The second one-way valve 19 only allows gas to be filled back into the gas return chamber 12 into the cavity, preventing gas from flowing back along the cavity into the gas return chamber 12. When the pressure of the gas in the cavity is higher than the pressure in the air return chamber 12, the second check valve 19 is closed; when the gas pressure in the cavity is smaller than the pressure in the air return chamber 12, the gas path check valve is opened.

Referring to fig. 1, in some embodiments of the present invention, the bracket 2 is provided with a pulley 4, and the pulley 4 is disposed on the bracket 2 through a seat 3. The seat body 3 is slidably coupled to the stand 2, the seat body 3 is coupled to the pile driving rod 6, the stand 2 is provided with a slide rail 16, one side of the slide rail 16 is slidably coupled to the pulley 4, and the other side is coupled to the driving rod 153. The pile driving rod 6 is sleeved with a connecting block 5, the connecting block 5 can freely slide on the support 2 along the moving direction of the pile driving rod 6, and the pile driving rod 6 can drive the connecting block 5 to do reciprocating motion in the reciprocating motion process. The connecting block 5 is connected with the base body 3 on the bracket 2 and can drive the pulley 4 on the base body 3 to reciprocate.

In this embodiment, the pulley 4 is movable on the slide rail 16, and when the pulley 4 moves on the slide rail 16, the slide rail 16 moves closer to the driving rod 153. When the joint of the driving rod 153 is moved, the slide 16 abuts against the driving rod 153, and a force is applied to the driving rod 153, so that the driving rod 153 drives the piston 152 to compress the gas in the cavity. Because the pulley 4 is arranged on the support 2 through the seat body 3, the seat body 3 can drive the pulley 4 to slide, and the piling bar 6 is connected with the seat body 3, when the piling bar 6 reciprocates to pile, the piling bar 6 can drive the pulley 4 to slide up and down, and the pulley 4 continuously reciprocates on the slideway 16 in the up-and-down sliding process, so that the slideway 16 drives the driving rod 153 which is continuously pushed and connected with the pulley.

Referring to fig. 1, in some embodiments of the present invention, the bracket 2 is symmetrically provided with two slide ways 16, the two slide ways 16 are located at two sides of the third cylinder 7, and the plurality of automatic air-supply pumps 15 are symmetrically arranged along the two slide ways 16.

In this embodiment, two slide ways 16 are provided on the support 2, and the plurality of automatic air feed pumps 15 are symmetrically arranged along the two slide ways 16, so that the air in the return chamber 12 can be uniformly forced into the supply chamber 13. It should be noted that, the two slide ways 16 are provided with corresponding pulleys 4 and seat bodies 3.

Referring to fig. 1 and 2, in some embodiments of the present invention, the slide way 16 is a folded structure, the driving rod 153 is connected to an inflection point of the folded structure, a return spring 21 is sleeved on the driving rod 153, one end of the return spring 21 is connected to the pump body 151, and the other end of the return spring is connected to the folded structure.

In this embodiment, the slide way 16 is of a folded structure, and the driving rod 153 is pressed by the pulley 4 at an inflection point of the folded structure, so that the driving rod 153 drives the piston 152 to compress the gas in the cavity more easily. Meanwhile, the reset spring 21 is arranged, so that the driving rod 153 pushed against by the pulley 4 can be automatically reset to the initial position after the pulley 4 leaves, and the pulley 4 is convenient to push next time. Meanwhile, in the resetting process, the return spring 21 drives the piston 152 to move to expand the gas in the cavity, so that a pressure difference is formed between the cavity and the air return chamber 12, the second one-way valve 19 is conveniently opened, and the gas in the air return chamber 12 enters the cavity under the action of the pressure difference.

Referring to fig. 1, in some embodiments of the present invention, the air supply chamber 13 is connected to an external air supply pump 1. The external air supply pump 1 includes an electric air supply pump or a manual air supply pump, and when the external air supply pump is initially operated, it is necessary to press air into the air supply chamber 13 so that the air is compressed in the air supply chamber 13, and after the air in the air supply chamber 13 enters the cylinder 10, the cylinder 10 is driven to operate under a certain pressure.

When the air supply device is used, the external air supply pump 1 is started to press air into the air supply chamber 13, and the air in the air supply chamber 13 enters the cylinder 10 under a certain pressure, so that the piston rod 11 of the cylinder 10 is driven to move. Similarly, when the pile hammer needs to move in the opposite direction, the control switch controls the air return chamber 12 to be communicated with the cylinder 10 and controls the air supply chamber 13 to be closed with the cylinder 10, at the moment, the pile hammer moves in the opposite direction under the action of gravity, and air in the cylinder 10 enters the air return chamber 12 during the movement process, so that the pile driving action can be realized in a reciprocating mode. In the above process, the pile driving rod 6 drives the connecting rod 14 to reciprocate during the reciprocating motion, so that the connecting rod 14 drives the inner tube 172 to automatically reciprocate, the inner tube 172 enables the first hole 1721 to be overlapped and communicated with the air supply inlet hole 1711 during the reciprocating motion, and the air supply outlet hole 1713 is overlapped and communicated with the second hole 1722. At this time, the gas in the gas supply chamber 13 enters the inner tube 172 through the first hole 1721, the third hole 1723 is not communicated with the discharge hole 1712, and the fourth hole 1724 is not communicated with the gas return chamber 12. Since the sealing plate separates the inner tube 172 corresponding to the first hole 1721 and the second hole 1722 from the inner tube 172 corresponding to the third hole 1723 and the fourth hole 1724, the gas introduced into the inner tube 172 enters the second hole 1722 along the inner tube 172 and enters the cylinder 10 along the gas supply/discharge hole 1713, thereby driving the cylinder 10 to operate. Similarly, during the reciprocating movement of the inner tube 172, the third hole 1723 can be connected to the exhaust hole 1712, the fourth hole 1724 can be connected to the air return chamber 12, the first hole 1721 is not overlapped with the air inlet hole 1711, and the air outlet hole 1713 is not overlapped with the second hole 1722. Thus, gas within the cylinder 10 may pass along the exhaust port 1712 into the section of the inner tube 172 at the third and fourth ports 1723, 1724 of the inner tube 172 where it passes along the fourth port 1724 and is recovered in the return chamber 12. The inner tube 172 repeats the above state during the reciprocating motion, so that the cylinder 10 drives the piston rod 11 of the cylinder 10 to drive the pile driving rod 6 to reciprocate, thereby driving the pile hammer to reciprocate for pile driving. At the same time, the pulley 4 is driven by the piling bar 6 to reciprocate, and when the pulley 4 moves on the slideway 16, the slideway 16 moves in the direction approaching the driving rod 153. When the joint of the driving rod 153 is moved, the slide 16 abuts against the driving rod 153, and a force is applied to the driving rod 153, so that the driving rod 153 drives the piston 152 to compress the gas in the cavity. Because above-mentioned pulley 4 passes through the pedestal 3 and sets up on support 2, the pedestal 3 can drive pulley 4 and slide, and pile stick 6 is connected with pedestal 3, consequently, when pile stick 6 reciprocating motion pile, pile stick 6 can drive pulley 4 and slide from top to bottom, pulley 4 is at last gliding in-process, constantly reciprocating motion on slide 16 to make slide 16 drive constantly push up and move the actuating lever 153 of being connected with it, make actuating lever 153 drive the action of automatic gas supply pump 15, the gas in the continuous return air chamber 12 is impressed air supply chamber 13.

In summary, the embodiment of the present invention provides a pneumatic pile driver, which includes a base 18, a bracket 2 disposed on the base 18, a cylinder 10, a first cylinder 9, a second cylinder 8, a third cylinder 7, and a pile driving rod 6. The cylinder 10 is arranged on the base 18, the first cylinder 9 is covered on the cylinder 10, and the piston rod 11 of the cylinder 10 can extend out of the first cylinder 9. The second cylinder 8 is covered on the first cylinder 9, and an air return chamber 12 is defined between the first cylinder 9 and the second cylinder 8. The third cylinder 7 is covered on the second cylinder 8, and a gas supply chamber 13 is defined between the second cylinder 8 and the third cylinder 7. The air return chamber 12 and the air supply chamber 13 are respectively communicated with the air cylinder 10, a control switch is arranged below the base 18 and used for controlling the opening and closing of the air return chamber 12 and the air supply chamber 13, and the piling rod 6 is connected with the piston rod 11. The base 18 is used for carrying the other components, the air cylinder 10 is the main component for driving the piling bar 6, and the air cylinder 10 can realize the reciprocating motion of the piling bar 6 so as to realize piling. The first cylinder 9 is used for placing the cylinder 10, so that the space can be saved. Meanwhile, the air supply chamber 13 formed between the first cylinder 9 and the second cylinder 8 supplies air to the air cylinder 10 to drive the air cylinder 10. Similarly, the return air chamber 12 formed between the second cylinder 8 and the third cylinder 7 is used for return air, so that the air in the cylinder 10 is discharged into the return air chamber 12. The arrangement of the first cylinder 9, the second cylinder 8 and the third cylinder 7 can reduce the occupied area while ensuring the volumes of the air return chamber 12 and the air supply chamber 13. The control switches control the supply and return of air to the cylinder 10 from the air supply chamber 13 and the air return chamber 12. For example, when the piston rod 11 of the cylinder 10 needs to move in a direction extending out of the cylinder 10 to drive the pile hammer on the pile driving rod 6 to lift, the control switch controls the air supply chamber 13 to communicate with the cylinder 10 and controls the air return chamber 12 to close the cylinder 10, and at this time, the air in the air supply chamber 13 enters the cylinder 10 under a certain pressure, thereby driving the piston rod 11 of the cylinder 10 to move. Similarly, when the pile hammer needs to move in the opposite direction, the control switch controls the air return chamber 12 to be communicated with the cylinder 10 and controls the air supply chamber 13 to be closed with the cylinder 10, at the moment, the pile hammer moves in the opposite direction under the action of gravity, and air in the cylinder 10 enters the air return chamber 12 during the movement process, so that the pile driving action can be realized in a reciprocating mode. A plurality of automatic air supply pumps 15 are provided between the air supply chamber 13 and the air return chamber 12, an inlet of the automatic air supply pump 15 is communicated with the air return chamber 12, and an outlet of the automatic air supply pump 15 is communicated with the air supply chamber 13. The automatic air supply pump 15 is used to continuously press the air in the air return chamber 12 into the air supply chamber 13, thereby realizing the recycling of the air, reducing the energy consumption and increasing the piling efficiency. Therefore, the air pressure pile driver has the advantages of utilizing air pressure to carry out pile driving operation, being small in energy consumption, small in occupied space, high in working efficiency and the like.

The above is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes will occur to those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.