A full-stroke pneumatic-hydraulic pump

Abstract

The present invention discloses a full-stroke pneumatic hydraulic pump, which comprises a cylinder barrel. A water inlet pipe is connected to the lower end of the bottom end cover, and a check valve for the water inlet is arranged on the water inlet pipe. Above the bottom end cover in the cylinder barrel, there is a vertical positioning block. The vertical positioning block is provided with a central positioning hole for the drain pipe in the cylinder, a positioning hole for the limit reversing rod, and a water passing hole. The drain pipe in the cylinder is inserted into the central positioning hole for the drain pipe in the cylinder, and the other end is connected to the drain pipe. A check valve for the drain port is arranged at the pipe orifice of the drain pipe. On the upper end cover, there are a two-position three-way push-pull pneumatic valve and a two-position three-way pneumatic reversing valve. The free end of the two-position three-way push-pull pneumatic valve is connected to the limit reversing rod through a limit nut, and the other end of the limit reversing rod is inserted into the positioning hole for the limit reversing rod. A piston is arranged on the limit reversing rod, a reset water absorption spring is arranged between the piston and the vertical positioning block, and a limit block is arranged on the limit reversing rod. The pneumatic hydraulic pump of the present invention is small in size and adopts a connecting rod design, which can realize non-stop commutation of the air pump and improve the water pumping efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydraulic pumps, and particularly relates to a full-stroke pneumatic hydraulic pump, which is suitable for working in places where electricity cannot be used, such as biogas wells in landfills. Background Art

[0002] A large amount of landfill gas (biogas) is generated in municipal solid waste landfills. This gas is a combustible gas with a foul smell and is continuously generated as the garbage increases. To ensure the safety of landfills and protect the environment, it is necessary to build vertical gas drainage wells on the landfill heap to continuously discharge the landfill gas generated in the garbage heap. However, since the landfill heap contains a large amount of water, the gas drainage wells are often soaked in water, affecting the effective drainage of gas. Therefore, it is necessary to drain the water in the wells in a timely manner. Currently, the general drainage method is for workers to monitor the water level in the monitoring sump manually. When the water level reaches a predetermined height, the workers start the water pump to drain the water. The water pumps used are generally electric pumps or traditional pneumatic hydraulic pumps. However, electric pumps have safety hazards, and the pumping frequency of traditional pneumatic hydraulic pumps is difficult to control, resulting in the phenomenon of stroke interruption, thus causing failures and affecting work efficiency. Summary of the Invention

[0003] To overcome the deficiencies of the above prior art, the present invention provides a full-stroke pneumatic hydraulic pump, which can achieve non-stop commutation of the air pump and improve the pumping efficiency.

[0004] To achieve the above object, the present invention adopts the following technical solutions:

[0005] A full-stroke pneumatic hydraulic pump includes a cylinder barrel. An upper end cover is provided at the top of the cylinder barrel, and a bottom end cover is provided at the bottom. The lower end of the bottom end cover is connected to a water inlet pipe, and a check valve for the water inlet is provided on the water inlet pipe.

[0006] Above the bottom end cover inside the cylinder barrel, a vertical positioning block is provided. A central positioning hole for the inner drainage pipe of the cylinder is provided at the center of the vertical positioning block. A positioning hole for the limit commutation rod and a water passing hole are also provided on the vertical positioning block. The water passing hole allows the liquid entering from the check valve for the water inlet to enter the lower part inside the cylinder barrel through the water passing hole. The inner drainage pipe of the cylinder penetrates through the upper end cover and extends into the cylinder barrel and is inserted into the central positioning hole for the inner drainage pipe of the cylinder. The other end of the inner drainage pipe of the cylinder is connected to a drainage pipe and extends outside the cylinder barrel. A check valve for the drainage port is provided at the pipe orifice of the drainage pipe.

[0007] A two-position three-way push-pull pneumatic valve and a two-position three-way pneumatic commutation valve are provided on the upper end cover. The air pump is communicated with the two-position three-way push-pull pneumatic valve and the two-position three-way pneumatic commutation valve. The two-position three-way push-pull pneumatic valve and the two-position three-way pneumatic commutation valve are provided with exhaust ports communicated with an exhaust pipe.

[0008] The free end of the two-position three-way push-pull pneumatic valve is connected to the limit reversing rod through a limit nut. The other end of the limit reversing rod is inserted into the limit reversing rod positioning hole. A piston is provided on the limit reversing rod. The outer edge of the piston extends to the inner wall of the cylinder barrel. The limit reversing rod and the inner cylinder drainage pipe penetrate through the piston. A return water absorption spring is provided between the piston and the vertical positioning block. A limit block is provided on the limit reversing rod at a position below the piston.

[0009] In the above technical solution, the other end of the water inlet pipe is connected to a filter.

[0010] In the above technical solution, multiple groups of water passing holes are provided. Each group of water passing holes consists of a radial water passing hole and a longitudinal water passing hole. The radial water passing hole is arranged radially along the vertical positioning block, and its height is below the lower end face of the inner cylinder drainage pipe. One end of the radial water passing hole is located on the side wall of the central positioning hole of the inner cylinder drainage pipe, and the other end communicates with the side wall of the longitudinal water passing hole. The upper end of the longitudinal water passing hole communicates with the inner cavity of the cylinder barrel. The liquid entering from the inlet check valve enters the cylinder barrel from the lower part after passing through the radial water passing hole and then through the longitudinal water passing hole.

[0011] In the above technical solution, a piston outer sealing ring is provided at the connection between the piston and the inner wall of the cylinder barrel, a limit reversing rod sealing ring is provided at the connection between the piston and the limit reversing rod, and an inner cylinder drainage pipe sealing ring is provided at the connection between the piston and the inner cylinder drainage pipe.

[0012] The beneficial effects of the present invention are as follows:

[0013] 1. The pneumatic hydraulic pump of the present invention is small and compact, suitable for working in places where electricity cannot be used, such as biogas wells in landfills, etc., and can be easily put in and taken out.

[0014] 2. The pneumatic hydraulic pump of the present invention adopts a connecting rod design, which can realize non-stop commutation of the air pump and improve the water pumping efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the pneumatic hydraulic pump of the present invention;

[0016] Figure 2 is Figure 1 an enlarged view of part A in, and the arrow direction in the figure is the water flow direction;

[0017] Figure 3 is Figure 1 an enlarged view of part B in;

[0018] Figure 4 is Figure 1 an enlarged view of part C in;

[0019] Figure 5 It is a perspective view of one of the embodiments of the vertical positioning block in the pneumatic hydraulic pump of the present invention;

[0020] Figure 6 It is a perspective view of the second embodiment of the vertical positioning block in the pneumatic hydraulic pump of the present invention;

[0021] Figure 7 It is a top view of the vertical positioning block in the pneumatic hydraulic pump of the present invention;

[0022] Wherein: 1. air pump; 2. drain check valve; 3. drain pipe; 4. two-position three-way push-pull pneumatic valve; 5. upper end cover; 6. limit nut; 7. cylinder barrel; 8. limit reversing rod; 9. drain pipe inside the cylinder; 10. piston; 11. outer piston seal ring; 12. limit reversing rod seal ring; 13. drain pipe seal ring inside the cylinder; 14. reset water absorption spring; 15. limit block; 16. vertical positioning block; 1601. water through hole; 16011. radial water through hole; 16012. longitudinal water through hole; 1602. center positioning hole of the drain pipe inside the cylinder; 1603. limit reversing rod positioning hole; 17. bottom end cover; 18. inlet check valve; 19. filter; 20. exhaust port; 21. two-position three-way pneumatic reversing valve; 22. inlet pipe. Detailed implementation manners

[0023] In order to better illustrate the purpose, technical solution and advantages of the present invention, the present invention will be further described below in conjunction with specific embodiments. The present invention can be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the present invention to those skilled in the art. The present invention will only be defined by the claims.

[0024] As Figure 1-7 shown, the present invention provides a full-stroke pneumatic hydraulic pump, including a cylinder barrel 7, with an upper end cover 5 provided at the top of the cylinder barrel 7 and a bottom end cover 17 provided at the bottom. The upper end cover 5 and the bottom end cover 17 are hermetically connected to the cylinder barrel 7. The bottom end cover 17 is connected to an inlet pipe 22 at the lower end. The inlet pipe 22 passes through the bottom end cover 17 and communicates with the inner cavity of the cylinder barrel 7. An inlet check valve 18 is provided on the inlet pipe 22, and the inlet check valve 18 only allows liquid to flow from outside the pump through the inlet check valve 18 into the pump.

[0025] Above the inner bottom end cover 17 of the cylinder barrel 7, there is a vertical positioning block 16. The diameter of the vertical positioning block 16 is equal to the inner diameter of the cylinder barrel 7, and the vertical positioning block 16 is hermetically connected to the inner wall of the cylinder barrel 7. In the center of the vertical positioning block 16, there is a central positioning hole 1602 for the in-cylinder drainage pipeline. The vertical positioning block 16 is also provided with a positioning hole 1603 for the limit reversing rod and a water passing hole 1601. The water passing hole 1601 allows the liquid entering from the inlet check valve 18 to enter the lower part of the cylinder barrel 7 through the water passing hole 1601. The in-cylinder drainage pipeline 9 passes through the upper end cover 5 and extends into the cylinder barrel 7 and is inserted into the central positioning hole 1602 of the in-cylinder drainage pipeline. The other end of the in-cylinder drainage pipeline 9 is connected to the drainage pipeline 3 and extends outside the cylinder barrel 7. The pipe orifice of the drainage pipeline 3 is provided with a drainage check valve 2, and the drainage check valve 2 only allows the liquid to flow from the drainage pipeline 3 to the outside of the pump.

[0026] On the upper end cover 5, there is a two-position three-way push-pull pneumatic valve 4 and a two-position three-way pneumatic reversing valve 21. The air pump 1 is connected to the two-position three-way push-pull pneumatic valve 4 and the two-position three-way pneumatic reversing valve 21, and the two-position three-way push-pull pneumatic valve 4 and the two-position three-way pneumatic reversing valve 21 are provided with exhaust ports connected to the exhaust pipe 20.

[0027] The free end of the two-position three-way push-pull pneumatic valve 4 is connected to the limit reversing rod 8 through a limit nut 6, and the other end of the limit reversing rod 8 is inserted into the positioning hole 1603 for the limit reversing rod. On the limit reversing rod 8, there is a piston 10. The outer edge of the piston 10 extends to the inner wall of the cylinder barrel 7. The limit reversing rod 8 and the in-cylinder drainage pipeline 9 pass through the piston 10. Between the piston 10 and the vertical positioning block 16, there is a reset water absorption spring 14. When the reset water absorption spring 14 extends to a certain extent, it drives the piston 10 to push the limit nut 6, causing the two-position three-way push-pull pneumatic valve 4 to retract.

[0028] On the limit reversing rod 8, a limit block 15 is provided at a position below the piston 10. When the piston 10 moves to the position of the limit block 15, it pushes the limit block 15 and drives the limit reversing rod 8 to move downward, causing the two-position three-way push-pull pneumatic valve 4 to be in an extended state and controlling the reversal of the two-position three-way pneumatic reversing valve 21.

[0029] In the above technical solution, the other end of the water inlet pipeline 22 is connected to the filter 19. The liquid outside the pump passes through the filter 19 and then enters the water inlet pipeline 22. The filter 19 filters the liquid outside the pump, filters out the garbage in the liquid, and the filtered clear liquid enters the water inlet pipeline 22 and is then pumped outside by the pump body. The setting of the filter 19 reduces the risk of blockage of the water inlet pipeline 22.

[0030] In the above technical solution, there are multiple groups of water through holes 1601. Each group of water through holes 1601 consists of a radial water through hole 16011 and a longitudinal water through hole 16012. The radial water through hole 16011 is arranged radially perpendicular to the positioning block 16, and its height is below the lower end face of the drain pipe 9 in the cylinder. One end of the radial water through hole 16011 is located on the side wall of the central positioning hole 1602 of the drain pipe in the cylinder, and the other end communicates with the side wall of the longitudinal water through hole 16012. The upper end of the longitudinal water through hole 16012 communicates with the inner cavity of the cylinder barrel 7. The liquid entering from the inlet check valve 18 enters the cylinder barrel 7 through the longitudinal water through hole 16012 after entering through the radial water through hole 16011. As Figure 5 And Figure 6 Shown in Figure 6 are two embodiments of the vertical positioning block 16. There are 6 longitudinal water through holes 16012, which are evenly distributed outside the central positioning hole 1602 of the drain pipe in the cylinder. There are 6 radial water through holes 16011, which are radially evenly distributed at the positions corresponding to the longitudinal water through holes 16012 on the vertical positioning block 16.

[0031] In the above technical solution, a piston outer seal ring 11 is provided at the connection between the piston 10 and the inner wall of the cylinder barrel 7, a limit reversing rod seal ring 12 is provided at the connection between the piston 10 and the limit reversing rod 8, and a drain pipe seal ring 13 in the cylinder is provided at the connection between the piston 10 and the drain pipe 9 in the cylinder. The settings of the piston outer seal ring 11, the limit reversing rod seal ring 12, and the drain pipe seal ring 13 in the cylinder can increase the airtightness of the upper and lower spaces of the piston 10 in the pump, making the pump body work more smoothly.

[0032] Working process: The air pump 1 pumps air into the two-position three-way push-pull pneumatic valve 4 and the two-position three-way pneumatic reversing valve 21 respectively. When the two-position three-way push-pull pneumatic valve 4 is in the retracted state, the gas flows upward to the upper part of the pump body through the two-position three-way pneumatic reversing valve 21. Due to the air pressure, the upper part of the pump body pushes the piston 10 downward, compressing the return water absorption spring 14. At this time, the inlet check valve 18 closes due to the pressure, and the liquid in the lower part of the pump body enters the drain pipe 3 through the water through hole 1601 on the vertical positioning block 16, pushing open the drain port check valve 2 to pump water outwards.

[0033] When the piston 10 moves to the position of the limit block 15, it pushes the limit block 15 and drives the limit reversing rod 8 to move downward, making the two-way three-way push-pull pneumatic valve 4 in an extended state and controlling the reversal of the two-way three-way pneumatic reversing valve 21. At this time, the upper part inside the pump body is connected to the atmosphere. Due to the air pressure, the gas inside the upper part of the pump body flows outwards. At this time, since the reset water absorption spring 14 no longer receives the downward pressure of the gas inside the pump body, the reset water absorption spring 14 resets and extends, pushing the piston 10 to move upward. Due to the pressure difference inside and outside the pump, the check valve 18 at the water inlet opens, and the check valve 2 at the water outlet closes. The liquid outside the pump enters the lower part of the pump body through the filter 19, the check valve 18 at the water inlet, and the water passing hole 1601 on the vertical positioning block 16. When the reset water absorption spring 14 extends to a certain extent, it drives the piston 10 to push the limit nut 6, making the two-way three-way push-pull pneumatic valve 4 retract, and repeating this cycle can achieve the water pumping action.

[0034] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to enumerate all implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. A full-stroke pneumatic hydraulic pump, characterized in that: it includes a cylinder barrel (7), the top of the cylinder barrel (7) is provided with an upper end cover (5), the bottom is provided with a bottom end cover (17), the lower end of the bottom end cover (17) is connected to a water inlet pipe (22), and a check valve (18) for the water inlet is provided on the water inlet pipe (22); above the bottom end cover (17) inside the cylinder barrel (7), there is a vertical positioning block (16), a central positioning hole (1602) for the drainage pipe inside the cylinder is provided in the center of the vertical positioning block (16), and a positioning hole (1603) for the limit reversing rod and a water passing hole (1601) are also provided on the vertical positioning block (16). The water passing hole (1601) can enable the liquid entering from the check valve (18) for the water inlet to enter the lower part inside the cylinder barrel (7) through the water passing hole (1601). The drainage pipe (9) inside the cylinder penetrates the upper end cover (5) and extends into the cylinder barrel (7) and is inserted into the central positioning hole (1602) for the drainage pipe inside the cylinder. The other end of the drainage pipe (9) inside the cylinder is connected to a drainage pipe (3) and extends outside the cylinder barrel (7), and a check valve (2) for the drainage port is provided at the pipe orifice of the drainage pipe (3); on the upper end cover (5), there are a two-position three-way push-pull pneumatic valve (4) and a two-position three-way pneumatic reversing valve (21). The air pump (1) is communicated with the two-position three-way push-pull pneumatic valve (4) and the two-position three-way pneumatic reversing valve (21). The two-position three-way push-pull pneumatic valve (4) and the two-position three-way pneumatic reversing valve (21) are provided with exhaust ports communicated with an exhaust pipe (20); the free end of the two-position three-way push-pull pneumatic valve (4) is connected to a limit reversing rod (8) through a limit nut (6). The other end of the limit reversing rod (8) is inserted into the positioning hole (1603) for the limit reversing rod. A piston (10) is provided on the limit reversing rod (8). The outer edge of the piston (10) extends to the inner wall of the cylinder barrel (7). The limit reversing rod (8) and the drainage pipe (9) inside the cylinder penetrate the piston (10). A return water absorption spring (14) is provided between the piston (10) and the vertical positioning block (16). A limit block (15) is provided on the limit reversing rod (8) at a position below the piston (10).

2. The full-stroke pneumatic hydraulic pump according to claim 1, characterized in that: the other end of the water inlet pipe (22) is connected to a filter (19).

3. The full-stroke pneumatic hydraulic pump according to claim 1, characterized in that: The water through holes (1601) are provided in multiple groups. Each group of the water through holes (1601) includes a radial water through hole (16011) and a longitudinal water through hole (16012). The radial water through hole (16011) is arranged radially along the vertical positioning block (16), and its height is below the lower end surface of the inner cylinder drainage pipe (9). One end of the radial water through hole (16011) is located on the side wall of the central positioning hole (1602) of the inner cylinder drainage pipe, and the other end communicates with the side wall of the longitudinal water through hole (16012). The upper end of the longitudinal water through hole (16012) communicates with the inner cavity of the cylinder barrel (7). The liquid entering from the inlet check valve (18) enters the cylinder barrel (7) through the longitudinal water through hole (16012) after entering through the radial water through hole (16011).

4. The full-stroke pneumatic hydraulic pump according to claim 1, characterized in that: A piston outer sealing ring (11) is provided at the connection between the piston (10) and the inner wall of the cylinder barrel (7), a limit reversing rod sealing ring (12) is provided at the connection between the piston (10) and the limit reversing rod (8), and a cylinder inner drainage pipe sealing ring (13) is provided at the connection between the piston (10) and the inner cylinder drainage pipe (9).

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