Modularized gas-driven booster pump

Abstract

The utility model discloses a modularized gas-driven booster pump which comprises a gas motor module and a high-pressure module, and the high-pressure module is detachably arranged on the gas motor module. The air motor module comprises a low-pressure cylinder and end covers, the end covers are detachably arranged at the two ends of the low-pressure cylinder and used for sealing the low-pressure cylinder, and a driving piston is arranged in the low-pressure cylinder in a sliding mode; the high-pressure module comprises a high-pressure piston, a high-pressure cylinder and a high-pressure head, and the high-pressure head is arranged at one end of the high-pressure cylinder and used for sealing one side of the high-pressure cylinder; the high-pressure piston is slidably arranged in the high-pressure cylinder; the end, away from the high-pressure head, of the high-pressure cylinder is detachably connected to the end cover, the high-pressure head is detachably connected to the end cover, the high-pressure piston is slidably connected to the end cover, and the end, away from the high-pressure head, of the high-pressure piston extends into the low-pressure cylinder and is detachably connected to the driving piston. The device has the advantages that installation is simple and efficient, and the maintenance and upgrading difficulty of the gas-driven booster pump is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of booster pumps, in particular to a modular air-driven booster pump. Background Art

[0002] Air-driven booster pumps have many advantages such as a wide pressure range, easy automation control, and suitability for explosion-proof occasions, and are widely used in many industries such as aviation, nuclear power, coal, oil and gas, and food. Air-driven booster pumps can boost various fluids such as liquids and gases. However, different industries have different requirements for media, pressure, and flow rate, which has led to a large number of models of air-driven booster pumps, long installation time of products, and difficulties in maintenance and upgrading.

[0003] In view of this, the purpose of the present utility model is to provide a new technical solution to solve the existing technical problems. Content of the Utility Model

[0004] In order to overcome the deficiencies of the prior art, the present utility model provides a modular air-driven booster pump, which solves the problems of long installation time, difficult maintenance and upgrading of existing air-driven booster pumps.

[0005] The technical solution adopted by the present utility model to solve its technical problems is:

[0006] A modular air-driven booster pump includes an air motor module and a high-pressure module. The high-pressure module is detachably arranged on the air motor module.

[0007] The air motor module includes a low-pressure cylinder and end caps. The end caps are detachably arranged at both ends of the low-pressure cylinder to close the low-pressure cylinder. A driving piston is slidably arranged in the low-pressure cylinder.

[0008] The high-pressure module includes a high-pressure piston, a high-pressure cylinder, and a high-pressure head. The high-pressure head is arranged at one end of the high-pressure cylinder to close one side of the high-pressure cylinder. The high-pressure piston is slidably arranged in the high-pressure cylinder.

[0009] One end of the high-pressure cylinder away from the high-pressure head is detachably connected to the end cap. The high-pressure head is detachably connected to the end cap. The high-pressure piston is slidably connected to the end cap, and one end of the high-pressure piston away from the high-pressure head extends into the low-pressure cylinder and is detachably connected to the driving piston.

[0010] In the above structure, a connecting boss is arranged on the end cap. The periphery of the connecting boss is closely fitted with the inner wall of the low-pressure cylinder. The air motor module further includes first double-headed studs and first nuts. First through holes are respectively arrayed around the two end caps on both sides. The first double-headed studs pass through the first through holes on both sides, and the two first nuts are threadedly connected to both ends of the first double-headed studs.

[0011] In the above structure, a first annular groove is formed in the connecting boss, and a first sealing ring is arranged in the first annular groove. The first sealing ring is in interference fit with the inner wall of the low-pressure cylinder barrel.

[0012] In the above structure, the high-pressure head is fixedly connected with a second boss. The inner wall of the low-pressure cylinder barrel is in close fit with the second boss. The high-pressure module further includes a second double-headed stud and a second nut. A second through hole is arrayed around the high-pressure head. One end of the second double-headed stud is threadedly connected to the side of the end cover facing away from the low-pressure cylinder barrel, and the other end passes through the second through hole. The second nut is threadedly connected to the end of the second double-headed stud away from the end cover.

[0013] In the above structure, the high-pressure piston includes a piston head slidably connected to the high-pressure cylinder and a plunger connected to the piston head. A threaded hole is formed in the middle of the driving piston, and a central through hole is formed in the middle of the end cover. The plunger is slidably connected to the central through hole. One end of the plunger away from the piston head is threadedly connected to the threaded hole. A piston sealing groove communicating with the central through hole is formed in the end cover, and a piston sealing ring is arranged in the piston sealing groove. The piston sealing ring is in interference fit with the periphery of the plunger.

[0014] In the above structure, a second annular groove is formed in the second boss, and a second sealing ring is arranged in the second annular groove. The second sealing ring is in interference fit with the inner wall of the high-pressure cylinder.

[0015] In the above structure, a third annular groove is formed on the periphery of the driving piston, and a third sealing ring is arranged in the third annular groove. The third sealing ring is in interference fit with the inner wall of the low-pressure cylinder barrel. A fourth annular groove is formed in the piston head, and a fourth sealing ring is arranged in the fourth annular groove. The fourth sealing ring is in interference fit with the inner wall of the high-pressure cylinder.

[0016] In the above structure, a rear cover is further included. One of the end covers is detachably connected with the high-pressure module. The rear cover is fixedly connected with a plug. The diameter of the plug is the same as the diameter of the central through hole. The rear cover is detachably fixed to the end cover on the side away from the high-pressure module, and the plug seals the central through hole.

[0017] In the above structure, high-pressure modules are detachably connected to both end covers.

[0018] The beneficial effects of the present utility model are as follows: By setting the air-driven booster pump into an air-driven motor module and a high-pressure module in a modular manner, the types of parts are minimized to the greatest extent, effectively reducing the production cost; and the independent modules are divided and the modules are detachably connected, so that specific modules can be maintained or upgraded. The structure is simple, and the maintenance and upgrade are efficient. Description of the Drawings

[0019] The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0020] Figure 1 It is a schematic structural diagram of the air motor module of the present utility model;

[0021] Figure 2 It is a schematic structural diagram of the high-pressure module of the present utility model;

[0022] Figure 3 It is a schematic structural diagram of an embodiment of the present utility model;

[0023] Figure 4 It is a schematic structural diagram of another embodiment of the present utility model;

[0024] Figure 5 It is a schematic diagram of the boosting principle of the air-driven booster pump.

[0025] Reference numerals:

[0026] 1. Air motor module; 11. Low-pressure cylinder; 12. End cover; 121. Connecting boss; 122. First sealing ring; 123. First through hole; 124. Central through hole; 125. Piston sealing ring; 13. Driving piston; 131. Third sealing ring; 132. Threaded hole; 14. First double-headed stud; 15. First nut;

[0027] 2. High-pressure module; 21. High-pressure piston; 211. Piston head; 212. Plunger; 213. Fourth sealing ring; 22. High-pressure cylinder; 23. High-pressure head; 231. Second boss; 232. Second sealing ring; 24. Second double-headed stud; 25. Second nut;

[0028] 3. Rear cover; 31. Plug. Specific embodiments

[0029] The following will further describe the present utility model in conjunction with the attached Figures 1-5 drawings.

[0030] The concept, specific structure and technical effects of the present utility model will be clearly and completely described below in conjunction with the embodiments and drawings, so as to fully understand the purpose, features and effects of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, other embodiments obtained by those skilled in the art without creative efforts shall fall within the scope of protection of the present utility model. In addition, all the connection / connection relationships involved in the patent do not simply refer to the direct connection of components, but refer to the more optimal connection structure that can be formed by adding or reducing connection accessories according to the specific implementation situation. The various technical features in the present utility model can be combined with each other without conflicting with each other.

[0031] Referring to Figures 1 to 4 , the present utility model provides a modular gas-driven booster pump, which can be applied to a gas-driven gas booster pump or a gas-driven liquid booster pump. Through modular design, maintenance and upgrade can be carried out for specific modules, which is beneficial to saving production costs and maintenance costs. The modular gas-driven booster pump includes a gas motor module 1 and a high-pressure module 2. The high-pressure module 2 is detachably connected to the gas motor module 1. When the gas motor module 1 acts on a driving air pressure Pa, it is boosted through the high-pressure module 2 to output a relatively large air pressure Pb. Among them, the motor module includes a low-pressure cylinder 11 and end caps 12. The end caps 12 are arranged at both ends of the low-pressure cylinder 11 to seal the low-pressure cylinder 11. A driving piston 13 is slidably arranged in the low-pressure cylinder 11; the high-pressure module 2 includes a high-pressure piston 21, a high-pressure cylinder 22 and a high-pressure head 23. The high-pressure head 23 is arranged on one side of the high-pressure cylinder 22 to seal one side of the high-pressure cylinder 22. The high-pressure piston 21 is slidably arranged in the high-pressure cylinder 22. One end of the high-pressure cylinder 22 away from the high-pressure head 23 is connected to the end cap 12. The high-pressure head 23 is detachably connected to the end cap 12, and one end of the high-pressure piston 21 away from the high-pressure head 23 extends into the low-pressure cylinder and is detachably connected to the driving piston 13. The modular gas-driven booster pump also includes conventional structures of a booster pump such as an inlet check valve, an outlet check valve and a gas source component, etc., which can be referred to the prior art, and the connection structure and working principle of these components will not be elaborated here.

[0032] Referring to Figure 1 and Figure 3 , specifically, the low-pressure cylinder 11 has a hollow cylindrical structure, and the end cap 12 has a rectangular structure. A connecting boss 121 is fixedly connected to one side of the end cap 12. The diameter of the connecting boss 121 is consistent with the inner diameter of the low-pressure cylinder 11. When the end cap 12 is installed on the low-pressure cylinder 11, the circumferential side wall of the connecting boss 121 is in close fit with the inner wall of the low-pressure cylinder 11. The driving piston 13 is arranged in the internal cavity of the low-pressure cylinder 11, and the circumferential side of the driving piston 13 is in sliding contact with the inner wall of the low-pressure cylinder 11.

[0033] Furthermore, a third annular groove is formed on the circumferential side of the driving piston 13, and a third sealing ring 131 is arranged in the third annular groove. The third sealing ring 131 is in interference fit with the inner wall of the low-pressure cylinder 11 to ensure the airtightness of the connection between the driving piston 13 and the low-pressure cylinder 11.

[0034] The air motor module 1 is also provided with a first double-headed stud 14 and a first nut 15. First through holes 123 are respectively and arrayedly opened around the end cover 12. The two ends of the first double-headed stud 14 respectively pass through the corresponding first through holes 123 on both sides of the end cover 12, and the two ends of the first double-headed stud 14 are respectively threadedly connected and fixed with the first nut 15, pressing the end covers 12 on both sides against the low-pressure cylinder 11. Through the connection and cooperation of the double-headed stud and the first nut 15, the connection and fixation between the end cover 12 and the low-pressure cylinder 11 are realized. The structure is simple, the installation and disassembly are convenient, and the maintenance difficulty of the air motor module 1 is effectively reduced.

[0035] In this embodiment, the first through holes 123 are opened at the four corners of the end cover 12. There are four first double-headed studs 14, and the four first double-headed studs 14 respectively correspond to the first through holes 123 at the corners one by one. Each first double-headed stud 14 is correspondingly connected with two first nuts 15. A first spring washer and a first flat washer are also connected between the first double-headed stud 14 and the first nuts 15 at both ends to ensure the reliability and tightness of the connection between the first nut 15 and the first double-headed stud 14.

[0036] Furthermore, a first annular groove is opened on the circumferential side of the connecting boss 121, and a first sealing ring 122 is arranged in the first annular groove. When the end cover 12 is installed and connected to both ends of the low-pressure cylinder 11, the first sealing ring 122 is in interference fit with the inner wall of the low-pressure cylinder 11. The setting of the first sealing ring 122 reduces the possibility of air leakage at the connection between the end cover 12 and the low-pressure cylinder 11, so as to ensure the airtightness at the connection between the low-pressure cylinder 11 and the end cover 12.

[0037] Refer to Figure 2 and Figure 3 , the high-pressure head 23 is arranged on one side of the high-pressure cylinder 22 to close one side of the high-pressure cylinder 22. Specifically, the high-pressure cylinder 22 has a hollow cylindrical structure, the end cover 12 has a rectangular structure, and a second boss 231 is fixedly connected to one side of the high-pressure head 23. The diameter of the second boss 231 is consistent with the inner diameter of the high-pressure cylinder 22. When the high-pressure head 23 is installed on the high-pressure cylinder 22, the circumferential side wall of the second boss 231 is in close fit with the inner wall of the high-pressure cylinder 22.

[0038] Furthermore, a second annular groove is opened on the second boss 231, and a second sealing ring 232 is arranged in the second annular groove. The second sealing ring 232 is in interference fit with the inner wall of the high-pressure cylinder. The setting of the second sealing ring 232 reduces the possibility of air leakage at the connection between the high-pressure head 23 and the high-pressure cylinder 22, so as to ensure the airtightness at the connection between the high-pressure cylinder 22 and the high-pressure head 23.

[0039] The high-pressure piston 21 is slidably disposed within the high-pressure cylinder 22, and one end of the high-pressure piston 21 away from the high-pressure head 23 extends into the low-pressure cylinder and is detachably connected to the driving piston 13. Specifically, the high-pressure piston 21 includes a piston head 211 and a plunger 212. The plunger 212 is fixedly connected to the piston head 211. The piston head 211 is slidably disposed within the high-pressure cylinder 22. A central through-hole 124 is formed in the middle of the end cap 12. The plunger 212 is slidably connected to the central through-hole 124 and extends into the low-pressure cylinder 11 through the central through-hole 124. A threaded hole 132 is formed in the middle of the driving piston 13. One end of the plunger 212 away from the piston head 211 is threadedly connected to the threaded hole 132.

[0040] Furthermore, a piston seal groove is formed in the end cap 12. The piston seal groove communicates with the central through-hole 124. A piston seal ring 125 is disposed within the piston seal groove. The piston seal ring 125 is in interference fit with the circumferential side of the plunger 212. The piston seal ring 125 is provided to ensure the sealing performance of the connection between the plunger 212 and the low-pressure cylinder 11. A fourth annular groove is formed in the piston head 211. A fourth seal ring 213 is disposed within the fourth annular groove. The fourth seal ring 213 is in interference fit with the inner wall of the high-pressure cylinder 22 to ensure the airtightness of the connection between the piston head 211 and the high-pressure cylinder 22.

[0041] The high-pressure module 2 further includes a second stud 24 and a second nut 25. Second through-holes are respectively arrayed around the high-pressure head 23. One end of the second stud 24 is threadedly connected to the side of the end cap 12 facing away from the low-pressure cylinder 11, and the other end passes through the second through-hole. The second nut 25 is threadedly connected to the end of the second stud 24 away from the end cap 12, connecting and fixing the high-pressure head 23 and the end cap 12, and further pressing the high-pressure cylinder 22 against one side of the end cap 12 to achieve the connection and fixation of the high-pressure module 2 and the air motor module 1. A second spring washer and a second flat washer are also connected between the second stud 24 and the second nut 25 to ensure the reliability and tightness of the connection between the second nut 25 and the second stud 24.

[0042] In this embodiment, there are four second studs 24 and four second nuts 25. The four second studs 24 and the four second nuts 25 correspond one by one. Four second through-holes are correspondingly formed in the high-pressure head 23. The connection and fixation of the high-pressure module 2 and the air motor module 1 are achieved through the cooperation of the stud and the nut, with a simple structure and convenient installation and disassembly.

[0043] Refer to Figure 3 and Figure 5, it should be noted that the area (Sb) of the force-receiving surface of the plunger 212 is smaller than the area (Sa) of the force-receiving surface of the driving piston 13, that is, there is an area difference between the driving piston 13 and the plunger 212. When a driving air pressure Pa acts on the force-receiving surface Sa of the driving piston 13, an output pressure Pb will be generated on one side of the plunger 212. According to the force balance, Pa·Sa = Pb·Sb, so Pb = Pa·(Sa / Sb). Sa / Sb is called the pressure boost ratio. When designing air-driven boost pumps with different pressure boost ratios, only the sizes of Sa or Sb need to be changed. Usually, the pressure boost ratio is changed by changing the area Sb of the plunger 212. In the same air-driven boost pump, Sa / Sb is a fixed value, so at this time, the output pressure Pb of the air-driven boost pump is only related to the driving air pressure Pa.

[0044] Referring to Figure 3 , in one embodiment, the air motor module 1 is connected to the high-pressure module 2 only on one side thereof, that is, a single-head air-driven boost pump is assembled by connecting one air motor module 1 and one high-pressure module 2. At this time, the modular air-driven boost pump further includes a rear cover 3. A plug 31 is fixedly connected to the rear cover 3. The diameter of the plug 31 is consistent with the aperture of the central through hole 124. The rear cover 3 is detachably fixed to the end cover 12 on the side away from the high-pressure module 2. And at this time, the plug 31 plugs the central through hole 124, and the piston seal ring 125 in the central through hole 124 is in interference fit with the circumferential side of the plug 31. The detachable fixation of the rear cover 3 and the end cover 12 can be achieved by fasteners such as screws, and this is not uniquely limited here.

[0045] Referring to Figure 4 , in another embodiment, the air motor module 1 is connected to the high-pressure module 2 on both sides, that is, a double-head air-driven boost pump is assembled by connecting one air motor module 1 and one high-pressure module 2. At this time, the sides of the plungers 212 of the high-pressure modules 2 away from the piston heads 211 are respectively threadedly connected to the driving piston 13, that is, the two plungers 212 are located on both sides of the driving piston 13, and the second double-headed studs 24 on the two high-pressure modules 2 are respectively threadedly connected to the corresponding end cover 12.

[0046] For a modular air-driven boost pump provided by the present utility model, when assembling a single-head air-driven boost pump, only the threaded hole 132 of the driving piston 13 in the air motor module 1 and the plunger 212 of the high-pressure piston 21 in the high-pressure module 2 need to be threadedly connected, and then the four second double-headed studs 24 of the high-pressure module 2 are threadedly connected to one side end cover 12, and the rear cover 3 is fixedly connected to the other side end cover 12; when assembling a double-head air-driven boost pump, only the rear end cover 12 on the air motor module 1 needs to be removed, and then the high-pressure module 2 is connected to both side end covers 12 respectively.

[0047] The above is a specific description of the preferred embodiment of the present utility model. However, the present utility model is not limited to the described embodiment. Those skilled in the art can make various equivalent deformations or substitutions without departing from the spirit of the present utility model, and these equivalent deformations or substitutions are all included within the scope defined by the claims of this application.

Claims

1. A modular gas-driven booster pump, characterized in that: It includes an air motor module and a high-pressure module, wherein the high-pressure module is detachably arranged on the air motor module; The air motor module comprises a low-pressure cylinder and an end cover, wherein the end cover is detachably arranged at both ends of the low-pressure cylinder to close the low-pressure cylinder, and a driving piston is slidably arranged in the low-pressure cylinder; The high-pressure module includes a high-pressure piston, a high-pressure cylinder and a high-pressure head. The high-pressure head is arranged at one end of the high-pressure cylinder to close one side of the high-pressure cylinder. The high-pressure piston is slidably arranged in the high-pressure cylinder. The end of the high-pressure cylinder away from the high-pressure head is detachably connected to the end cover, the high-pressure head is detachably connected to the end cover, the high-pressure piston is slidably connected to the end cover, and the end of the high-pressure piston away from the high-pressure head extends into the low-pressure cylinder and is detachably connected to the driving piston.

2. A modular air-driven booster pump according to claim 1, characterized in that: A connecting boss is provided on the end cover, and the surrounding side of the connecting boss is tightly matched with the inner wall of the low-pressure cylinder. The air motor module also includes a first stud and a first nut. First through holes are arranged in an array around the end covers on both sides. The first stud passes through the first through holes on both sides, and the two first nuts are threadedly connected to the two ends of the first stud.

3. A modular air-driven booster pump according to claim 2, characterized in that: The connecting boss is provided with a first annular groove, a first sealing ring is arranged in the first annular groove, and the first sealing ring is interference-fitted with the inner wall of the low-pressure cylinder.

4. A modular air-driven booster pump according to claim 1, characterized in that: The high-pressure head is fixedly connected to a second boss, and the inner wall of the low-pressure cylinder is tightly matched with the second boss. The high-pressure module also includes a second stud and a second nut. A second through hole is arranged in an array around the high-pressure head. One end of the second stud is threadedly connected to the side of the end cover facing away from the low-pressure cylinder, and the other end passes through the second through hole. The second nut is threadedly connected to the end of the second stud away from the end cover.

5. A modular air-driven booster pump according to claim 4, characterized in that: The high-pressure piston includes a piston head slidably connected to the high-pressure cylinder and a plunger connected to the piston head. A threaded hole is provided in the middle of the driving piston, and a center through hole is provided in the middle of the end cover. The plunger is slidably connected to the center through hole. One end of the plunger away from the piston head is threadedly connected to the threaded hole. The end cover is provided with a piston sealing groove connected to the center through hole. A piston sealing ring is arranged in the piston sealing groove, and the piston sealing ring is interference fit with the circumference of the plunger.

6. A modular air-driven booster pump according to claim 5, characterized in that: A second annular groove is formed on the second boss, a second sealing ring is arranged in the second annular groove, and the second sealing ring is interference-fitted with the inner wall of the high-pressure cylinder.

7. A modular air-driven booster pump according to claim 5, characterized in that: A third annular groove is provided on the circumferential side of the driving piston, a third sealing ring is arranged in the third annular groove, the third sealing ring is interference fit with the inner wall of the low-pressure cylinder, a fourth annular groove is provided on the piston head, a fourth sealing ring is arranged in the fourth annular groove, the fourth sealing ring is interference fit with the inner wall of the high-pressure cylinder.

8. A modular air-driven booster pump according to any one of claims 5 to 7, characterized in that: It also includes a back cover, one side of which is detachably connected to a high-voltage module, and the back cover is fixedly connected to a plug, the diameter of the plug is consistent with the aperture of the central through hole, the back cover is detachably fixed to the end cover on the side away from the high-voltage module, and the plug seals the central through hole.

9. A modular air-driven booster pump according to any one of claims 5 to 7, characterized in that: The end covers on both sides are detachably connected with high-voltage modules.

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