A windbag pump

Abstract

The application belongs to the technical field of liquid delivery pumps, and discloses a wind bag pump which comprises a pump shell, a wind bag assembly arranged in the pump shell, and a reversing valve arranged in the pump shell, the wind bag assembly comprises a first wind bag and a second wind bag, the interior of the pump shell is provided with a first air inlet channel, a second air inlet channel, a first air outlet channel, a second air outlet channel and a communication channel, the first air inlet channel is used for connecting the first wind bag and one air outlet of the reversing valve, the second air inlet channel is used for connecting the second wind bag and the other air outlet of the reversing valve, the first air outlet channel is used for connecting the first wind bag and one air inlet of the reversing valve, the second air outlet channel is used for connecting the second wind bag and the other air inlet of the reversing valve, and the communication channel is used for connecting the air inlets of the reversing valve and a pipeline for delivering compressed air, so as to ensure the working efficiency of the wind bag pump and improve the production efficiency of the wind bag pump.

Description

Technical Field

[0001] This application belongs to the technical field of liquid transfer pumps, and specifically relates to a wind bag pump. Background Technology

[0002] A wind-bag pump is a device that uses compressed air as power to transport liquids through the reciprocating motion of an elastic windbag. It is widely used in semiconductor manufacturing, photolithography, thin film deposition and other fields. When the wind-bag pump is working, compressed air enters the gas phase working chamber on one side of the pump body, which pushes the windbag to deform and move. The airflow is controlled by a reversing valve so that the liquid phase working chamber alternately draws in and discharges liquid. For example, when the windbag expands, the volume of the pump chamber decreases and the liquid is discharged from the outlet. When the windbag contracts, the pressure in the pump chamber decreases and the liquid is drawn in from the inlet.

[0003] Currently, a typical airbag pump includes a pump housing, an airbag assembly, a one-way valve assembly, and a reversing valve located outside the pump housing. The airbag assembly includes a first airbag and a second airbag arranged opposite each other. The pump housing has an inlet channel and an outlet channel. The one-way valve assembly is connected to the inlet and outlet channels. Two sets of one-way valve assemblies are provided, corresponding to the first and second airbags respectively. The reversing valve is used to switch the flow path of compressed air to achieve alternating expansion and contraction of the first and second airbags. However, since the reversing valve is located outside the pump housing, additional pipelines are required to connect the reversing valve to the first and second airbags. These pipelines are generally installed using threaded joints, resulting in a large number of components required for the production of the airbag pump, thus affecting the production efficiency. At the same time, the need for additional pipelines to connect the reversing valve to the first and second airbags also increases the risk of air leakage, further affecting the working efficiency of the airbag pump. Utility Model Content

[0004] This application provides an airbag pump that reduces the number of components required for assembly during the production of the airbag pump and lowers the risk of air leakage, thereby improving the production efficiency of the airbag pump and ensuring its working efficiency.

[0005] The technical solution adopted in this application is as follows: A windbag pump includes a pump housing, a windbag assembly disposed inside the pump housing, and a reversing valve disposed inside the pump housing. The windbag assembly includes a first windbag and a second windbag. The pump housing is provided with a first air intake channel, a second air intake channel, a first exhaust channel, a second exhaust channel, and a connecting channel. The first air intake channel is used to connect the first windbag and one of the air outlets of the reversing valve. The second air intake channel is used to connect the second windbag and the other air outlet of the reversing valve. The first exhaust channel is used to connect the first windbag and one of the exhaust inlets of the reversing valve. The second exhaust channel is used to connect the second windbag and the other exhaust inlet of the reversing valve. The connecting channel is used to connect the air intake of the reversing valve and a pipeline for delivering compressed air.

[0006] By adopting the above technical solution, since the first air intake channel is used to connect the first airbag and one of the air outlets of the reversing valve, the second air intake channel is used to connect the second airbag and the other air outlet of the reversing valve, the first exhaust channel is used to connect the first airbag and one of the exhaust inlets of the reversing valve, and the second exhaust channel is used to connect the second airbag and the other exhaust inlet of the reversing valve, and the first air intake channel, the second air intake channel, the first exhaust channel and the second exhaust channel are all located inside the pump casing, thereby avoiding the need to assemble pipelines during the production of the airbag pump, reducing the number of components that need to be assembled during the production of the airbag pump, thus improving the assembly efficiency of the airbag pump, thereby improving the production efficiency of the airbag pump and reducing the assembly cost of the airbag pump. On the other hand, compared with the existing technology that requires the use of pipelines to connect the reversing valve and the airbag assembly, the risk of air leakage of the airbag pump is greatly reduced, thus ensuring the working efficiency of the airbag pump.

[0007] Optionally, the pump housing includes a housing, a first end cap disposed at one end of the housing, and a second end cap disposed at the other end of the housing. The housing has a first accommodating space and a second accommodating space inside. The first airbag is located in the first accommodating space, and the second airbag is located in the second accommodating space. The first end cap is used to seal the first accommodating space, and the second end cap is used to seal the second accommodating space.

[0008] By adopting the above technical solution, since the pump casing includes a housing, a first end cover and a second end cover, and the first air bag is located in the first accommodating space and the second air bag is located in the second accommodating space, the first end cover is used to seal the first accommodating space and the second end cover is used to seal the second accommodating space, thereby reducing the assembly difficulty of the first air bag and the second air bag, so as to facilitate the assembly of the first air bag and the second air bag, thereby further improving the production efficiency of the air bag pump and further reducing the assembly cost of the air bag pump.

[0009] Optionally, the housing has a first mounting cavity inside, and the reversing valve is located in the first mounting cavity; the first air intake channel includes a first air intake section disposed on the housing and a second air intake section disposed on the first end cover; the second air intake channel includes a first input section disposed on the housing and a second input section disposed on the second end cover; the first exhaust channel includes a first exhaust section disposed on the housing and a second exhaust section disposed on the first end cover; the second exhaust channel includes a first output section disposed on the housing and a second output section disposed on the second end cover.

[0010] By adopting the above technical solution, the molding difficulty of the first air intake channel is reduced because the first air intake channel includes a first air intake section located in the housing and a second air intake section located in the first end cover; the molding difficulty of the second air intake channel is reduced because the second air intake channel includes a first input section located in the housing and a second input section located in the second end cover; the molding difficulty of the first exhaust channel is reduced because the first exhaust channel includes a first exhaust section located in the housing and a second exhaust section located in the first end cover; and the molding difficulty of the second exhaust channel is reduced because the second exhaust channel includes a first output section located in the housing and a second output section located in the second end cover. This reduces the production difficulty of the pump housing and, consequently, the production cost of the airbag pump.

[0011] Optionally, the second air intake section has a first process orifice located on the outer peripheral surface of the first end cover, and the first end cover is provided with a first sealing plug extending into the second air intake section and used to seal the first process orifice. And / or, the second input segment has a second process opening located on the outer peripheral surface of the second end cap, and the second end cap is provided with a second sealing plug extending into the second input segment for sealing the second process opening; And / or, the second exhaust section has a third process orifice located on the outer peripheral surface of the first end cap, and the first end cap is provided with a third sealing plug extending into the second exhaust section and used to seal the third process orifice; And / or, the second output section has a fourth process orifice located on the outer peripheral surface of the second end cap, and the second end cap is provided with a fourth sealing plug extending into the second output section for sealing the fourth process orifice.

[0012] By adopting the above technical solution, since the second air intake section has a first process orifice located on the outer circumferential surface of the first end cover, the second air intake section can be formed inside the first end cover by drilling or pre-drilling, thereby reducing the molding difficulty of the second air intake section and reducing the production cost of the first end cover, thereby further reducing the production cost of the airbag pump; and since the first end cover is provided with a first sealing plug that extends into the second air intake section and is used to seal the first process orifice, the sealing performance of the second air intake section can be guaranteed, thereby guaranteeing the sealing performance of the first air intake channel, and thus ensuring the working efficiency of the airbag pump.

[0013] Because the second input section has a second process opening located on the outer circumference of the second end cap, the second input section can be formed inside the second end cap by drilling or pre-drilling, thereby reducing the molding difficulty of the second input section and reducing the production cost of the second end cap, which in turn reduces the production cost of the airbag pump. Furthermore, because the second end cap is provided with a second sealing plug that extends into the second input section and is used to seal the second process opening, the sealing performance of the second input section can be guaranteed, thereby ensuring the sealing performance of the second air intake channel and thus ensuring the working efficiency of the airbag pump.

[0014] Because the second exhaust section has a third process orifice located on the outer circumference of the first end cap, the second exhaust section can be formed inside the first end cap by drilling or pre-drilling, thereby reducing the molding difficulty of the second exhaust section and reducing the production cost of the first end cap, which in turn reduces the production cost of the airbag pump. Furthermore, because the first end cap is provided with a third sealing plug that extends into the second exhaust section and is used to seal the third process orifice, the sealing performance of the second exhaust section can be guaranteed, thereby ensuring the sealing performance of the first exhaust channel and thus ensuring the working efficiency of the airbag pump.

[0015] Because the second output section has a fourth process orifice located on the outer circumference of the second end cap, the second output section can be formed inside the second end cap by drilling or pre-drilling, thereby reducing the molding difficulty of the second output section and thus reducing the production cost of the second end cap, which in turn reduces the production cost of the airbag pump. Furthermore, because the second end cap is provided with a fourth sealing plug that extends into the second output section and is used to seal the fourth process orifice, the sealing performance of the second output section can be guaranteed, thereby ensuring the sealing performance of the second exhaust channel and thus ensuring the working efficiency of the airbag pump.

[0016] Optionally, the pump housing further includes a fixing bolt assembly, the bolt of which passes through the first end cover, the housing, and the second end cover, and the bolt head and nut of which abut against the first end cover and the second end cover, respectively.

[0017] By adopting the above technical solution, since the screw of the fixing bolt pair passes through the first end cover, the housing, and the second end cover, and the bolt head and nut of the fixing bolt pair are respectively pressed against the first end cover and the second end cover, the first end cover and the second end cover can be fixedly connected to the housing by the mutual compression of the bolt head and nut of the fixing bolt pair, thereby increasing the connection stability between the first end cover and the second end cover and the housing, and also increasing the sealing between the first end cover and the second end cover and the housing, so as to ensure the working efficiency of the airbag pump.

[0018] Optionally, the first end cap is provided with a first protrusion, which extends into the interior of the first airbag; And / or, the second end cap is provided with a second protrusion that extends into the interior of the second airbag.

[0019] By adopting the above technical solution, since the first end cover is provided with a first protrusion that extends into the interior of the first airbag, the first protrusion can limit the compression stroke of the first airbag on the one hand, and guide the first airbag on the other hand, thereby increasing the stability of the first airbag during expansion and contraction.

[0020] Because the second end cap is provided with a second protrusion that extends into the interior of the second airbag, the second protrusion can limit the compression stroke of the second airbag on the one hand, and guide the second airbag on the other hand, thereby increasing the stability of the second airbag during expansion and contraction.

[0021] Optionally, the pump housing includes a housing, a first end cap disposed at one end of the housing, and a second end cap disposed at the other end of the housing. One of the first end cap and the housing is provided with a first positioning groove, and the other of the two is provided with a first positioning rib extending into the first positioning groove. One of the second end cap and the housing is provided with a second positioning groove, and the other of the two is provided with a second positioning rib extending into the second positioning groove.

[0022] By adopting the above technical solution, since one of the first end cover and the housing is provided with a first positioning groove, and the other is provided with a first positioning rib extending into the first positioning groove, the positioning and limiting of the first end cover and the housing can be achieved by the cooperation of the first positioning rib and the first positioning groove, thereby increasing the connection stability between the first end cover and the housing. At the same time, it can also facilitate the installation of the fixing bolt pair, thereby reducing the assembly difficulty of the fixing bolt pair and further reducing the assembly cost of the airbag pump.

[0023] Since one of the second end cap and the housing is provided with a second positioning groove, and the other is provided with a second positioning rib extending into the second positioning groove, the second positioning rib and the second positioning groove can be used to position and limit the second end cap and the housing, thereby increasing the connection stability between the second end cap and the housing. At the same time, it can also facilitate the installation of the fixing bolt pair, thereby reducing the assembly difficulty of the fixing bolt pair and further reducing the assembly cost of the airbag pump.

[0024] Optionally, the first positioning groove extends circumferentially along the housing, and the first positioning rib is adapted to the first positioning groove. And / or, the second positioning groove extends circumferentially along the housing, and the second positioning rib is adapted to the second positioning groove.

[0025] By adopting the above technical solution, since the first positioning groove extends along the circumference of the shell and the first positioning rib is adapted to the first positioning groove, on the one hand, the mating area between the first positioning rib and the first positioning groove can be increased, thereby increasing the positioning and limiting effect of the first positioning rib and the first positioning groove on the first end cover and the shell. On the other hand, the contact area between the first end cover and the shell can be increased, thereby increasing the sealing between the first end cover and the shell, and further ensuring the working efficiency of the airbag pump.

[0026] Since the second positioning groove extends circumferentially along the housing, and the second positioning rib is adapted to the second positioning groove, it can increase the mating area between the second positioning rib and the second positioning groove, thereby increasing the positioning and limiting effect of the second positioning rib and the second positioning groove on the second end cover and the housing. On the other hand, it can also increase the contact area between the second end cover and the housing, thereby increasing the sealing between the second end cover and the housing, and further ensuring the working efficiency of the airbag pump.

[0027] Optionally, a first sealing ring is provided in the first positioning groove, and the first positioning rib can apply a compressive force to the first sealing ring; And / or, a second sealing ring is provided in the second positioning groove, and the second positioning rib can apply a compressive force to the second sealing ring.

[0028] By adopting the above technical solution, since a first sealing ring is provided in the first positioning groove, the first positioning rib can apply a compressive force to the first sealing ring, and then the first sealing ring can be used to seal the gap between the first positioning rib and the first positioning groove, so as to further increase the sealing performance between the first end cover and the housing, thereby further ensuring the sealing performance of the airbag pump, and further ensuring the working efficiency of the airbag pump.

[0029] Because a second sealing ring is provided in the second positioning groove, the second positioning rib can apply a compressive force to the second sealing ring, thereby sealing the gap between the second positioning rib and the second positioning groove using the second sealing ring, further increasing the sealing performance between the second end cover and the housing, thus further ensuring the sealing performance of the airbag pump, and further ensuring the working efficiency of the airbag pump.

[0030] Optionally, the pump housing further includes a first sealing gasket, which is located between the first end cap and the housing; And / or, the pump housing further includes a second sealing gasket located between the second end cap and the housing.

[0031] By adopting the above technical solution, since the pump casing also includes a first sealing gasket, which is located between the first end cover and the housing, the first sealing gasket can be deformed by the mutual compression of the first end cover and the housing, thereby further increasing the sealing performance between the first end cover and the housing, so as to further ensure the sealing performance of the airbag pump, and further ensure the working efficiency of the airbag pump.

[0032] Since the pump casing also includes a second sealing gasket, which is located between the second end cover and the housing, the second sealing gasket can be deformed by the mutual compression of the second end cover and the housing, thereby further increasing the sealing between the second end cover and the housing, so as to further ensure the sealing performance of the airbag pump, and thus further ensure the working efficiency of the airbag pump.

[0033] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows: 1. The airbag pump of this application includes a pump housing, an airbag assembly disposed inside the pump housing, and a reversing valve disposed inside the pump housing. The airbag assembly includes a first airbag and a second airbag. The pump housing is provided with a first air intake channel, a second air intake channel, a first exhaust channel, a second exhaust channel, and a connecting channel. The first air intake channel is used to connect the first airbag and one of the air outlets of the reversing valve. The second air intake channel is used to connect the second airbag and the other air outlet of the reversing valve. The first exhaust channel is used to connect the first airbag and one of the exhaust inlets of the reversing valve. The second exhaust channel is used to connect the second airbag and the other exhaust inlet of the reversing valve. The exhaust inlet and connecting channel connect the intake inlet of the reversing valve and the pipeline for delivering compressed air. This avoids the need to assemble the pipeline during the production of the airbag pump, reducing the number of components required for assembly and thus improving the assembly efficiency of the airbag pump. Consequently, it increases the production efficiency of the airbag pump and reduces its assembly cost. Furthermore, compared to the existing technology that requires pipelines to connect the reversing valve and the airbag assembly, this significantly reduces the risk of air leakage in the airbag pump, thereby ensuring its working efficiency.

[0034] 2. The pump casing in this application includes a housing, a first end cap at one end of the housing, and a second end cap at the other end of the housing. The housing has a first accommodating space and a second accommodating space inside. The first airbag is located in the first accommodating space, and the second airbag is located in the second accommodating space. The first end cap is used to seal the first accommodating space, and the second end cap is used to seal the second accommodating space, thereby reducing the assembly difficulty of the first airbag and the second airbag, so as to facilitate the assembly of the first airbag and the second airbag, thereby further improving the production efficiency of the airbag pump and further reducing the assembly cost of the airbag pump.

[0035] 3. In this application, one of the first end cap and the housing is provided with a first positioning groove, and the other is provided with a first positioning rib extending into the first positioning groove; one of the second end cap and the housing is provided with a second positioning groove, and the other is provided with a second positioning rib extending into the second positioning groove. Thus, the first positioning rib and the first positioning groove can be used to position and limit the first end cap and the housing, thereby increasing the connection stability between the first end cap and the housing. At the same time, it can also facilitate the installation of the fixing bolt pair, thereby reducing the assembly difficulty of the fixing bolt pair and further reducing the assembly cost of the airbag pump. Attached Figure Description

[0036] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings: Figure 1This is a schematic diagram of the structure of the airbag pump described in one embodiment of this application; Figure 2 This is a schematic diagram of the airbag pump described in one embodiment of this application from another perspective; Figure 3 This is an exploded schematic diagram of a portion of the structure of the airbag pump described in one embodiment of this application; Figure 4 This is a first-view cross-sectional view of the airbag pump described in one embodiment of this application; Figure 5 This is a second-view cross-sectional view of the airbag pump described in one embodiment of this application; Figure 6 This is a third-view cross-sectional view of the airbag pump described in one embodiment of this application; Figure 7 This is a fourth-angle cross-sectional view of the airbag pump described in one embodiment of this application; Figure 8 for Figure 7 Enlarged view of part A in the middle; Figure 9 for Figure 7 Enlarged view of part B in the middle.

[0037] Figure label: 1. Pump casing; 11. Housing; 111. Inlet channel; 112. Outlet channel; 113. First positioning groove; 114. Second positioning groove; 115. First sealing ring; 116. Second sealing ring; 12. First end cap; 121. First boss; 122. First positioning rib; 13. Second end cap; 131. Second boss; 132. Second positioning rib; 14. Fixing bolt pair; 2. Airbag assembly; 21. First airbag; 22. Second airbag; 3. Reversing valve; 4. 41. First intake channel; 42. Second intake section; 421. First process orifice; 5. Second intake channel; 51. First input section; 52. Second input section; 521. Second process orifice; 6. First exhaust channel; 61. First exhaust section; 62. Second exhaust section; 621. Third process orifice; 7. Second exhaust channel; 71. First output section; 72. Second output section; 721. Fourth process orifice; 8. Connecting channel; 9. One-way valve assembly. Detailed Implementation

[0038] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0039] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0040] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0041] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0042] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "a particular embodiment," "example," or "specific example," etc., indicate that the specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0043] Reference Figures 1 to 9 A wind bag pump is disclosed, comprising a pump housing 1, a wind bag assembly 2 disposed inside the pump housing 1, and a reversing valve 3 disposed inside the pump housing 1. The wind bag assembly 2 includes a first wind bag 21 and a second wind bag 22. The pump housing 1 is provided with a first air intake channel 4, a second air intake channel 5, a first exhaust channel 6, a second exhaust channel 7, and a connecting channel 8. The first air intake channel 4 is used to connect the first wind bag 21 and one of the air outlets of the reversing valve 3. The second air intake channel 5 is used to connect the second wind bag 22 and the other air outlet of the reversing valve 3. The first exhaust channel 6 is used to connect the first wind bag 21 and one of the exhaust inlets of the reversing valve 3. The second exhaust channel 7 is used to connect the second wind bag 22 and the other exhaust inlet of the reversing valve 3. The connecting channel 8 is used to connect the air intake of the reversing valve 3 and a pipeline for conveying compressed air.

[0044] It is understood that one of the passage openings of the connecting channel 8 is located on the outer peripheral surface of the pump housing 1 for connection to a pipeline for conveying compressed air, so that the compressed air can alternately enter the first air bag 21 and the second air bag 22 under the switching action of the reversing valve 3. The pump housing 1 is provided with a perforated structure for the two exhaust outlets corresponding to the reversing valve 3, so that the gas discharged through the exhaust outlet of the reversing valve 3 can be discharged to the outside of the pump housing 1.

[0045] Since the first air intake channel 4 is used to connect the first air bag 21 and one of the air outlets of the reversing valve 3, the second air intake channel 5 is used to connect the second air bag 22 and the other air outlet of the reversing valve 3, the first exhaust channel 6 is used to connect the first air bag 21 and one of the exhaust inlets of the reversing valve 3, and the second exhaust channel 7 is used to connect the second air bag 22 and the other exhaust inlet of the reversing valve 3, and the first air intake channel 4, the second air intake channel 5, the first exhaust channel 6 and the second exhaust channel 7 are all located inside the pump housing 1, this avoids the need to assemble pipelines during the production of the air bag pump, thereby reducing the number of components required for assembly and improving the assembly efficiency of the air bag pump. This, in turn, increases the production efficiency of the air bag pump and reduces its assembly cost. Furthermore, compared to the existing technology that requires pipelines to connect the reversing valve 3 and the air bag assembly 2, this significantly reduces the risk of air leakage in the air bag pump, thus ensuring its working efficiency.

[0046] This application does not specifically limit the structure of the pump casing 1; preferably, refer to... Figures 1 to 7 The pump housing 1 includes a housing 11, a first end cap 12 located at one end of the housing 11, and a second end cap 13 located at the other end of the housing 11. The housing 11 has a first accommodating space and a second accommodating space inside. A first air bag 21 is located in the first accommodating space, and a second air bag 22 is located in the second accommodating space. The first end cap 12 is used to seal the first accommodating space, and the second end cap 13 is used to seal the second accommodating space.

[0047] It is understood that the first accommodating space and the second accommodating space are arranged opposite to each other so that the first airbag 21 and the second airbag 22 are arranged opposite to each other, the first end cap 12 is fixedly connected to one end of the housing 11, and the second end cap 13 is fixedly connected to the other end of the housing 11.

[0048] Since the pump casing 1 includes a housing 11, a first end cap 12 and a second end cap 13, and the first air bag 21 is located in the first accommodating space and the second air bag 22 is located in the second accommodating space, the first end cap 12 is used to seal the first accommodating space and the second end cap 13 is used to seal the second accommodating space, thereby reducing the assembly difficulty of the first air bag 21 and the second air bag 22, so as to facilitate the assembly of the first air bag 21 and the second air bag 22, thereby further improving the production efficiency of the air bag pump and further reducing the assembly cost of the air bag pump.

[0049] Furthermore, the airbag pump also includes a central shaft located inside the pump housing 1. The central shaft is located between the first airbag 21 and the second airbag 22, with one end of the central shaft located in the first accommodating space and the other end located in the second accommodating space. The central shaft can move within the pump housing 1 under the squeezing action of the first airbag 21 or the second airbag 22.

[0050] Specifically, when the first airbag 21 needs to inflate, compressed air enters the reversing valve 3 through the pipeline, connecting channel 8, and the air inlet of the reversing valve 3. This causes the compressed air to exit through the outlet corresponding to the first airbag 21 and enter the first airbag 21 through the first air inlet channel 4, thereby causing the first airbag 21 to inflate. During the inflation of the first airbag 21, the first airbag 21 drives the central shaft, causing the central shaft to compress the second airbag 22. The gas in the second airbag 22 enters the reversing valve 3 through the second exhaust channel 7 and is then discharged through the reversing valve 3. When the second airbag 22 needs to expand, compressed air enters the interior of the reversing valve 3 through the pipeline, the connecting channel 8 and the air inlet of the reversing valve 3, so that the compressed air is discharged through the air outlet corresponding to the second airbag 22 and enters the interior of the second airbag 22 through the second air inlet channel 5, thereby causing the second airbag 22 to expand. During the expansion of the second airbag 22, the second airbag 22 drives the central shaft, so that the central shaft compresses the first airbag 21. The gas in the first airbag 21 enters the reversing valve 3 through the first exhaust channel 6 and is discharged through the reversing valve 3.

[0051] This application does not specify the arrangement of the first intake channel 4, the second intake channel 5, the first exhaust channel 6, and the second exhaust channel 7. Preferably, refer to Figure 6The housing 11 has a first mounting cavity inside, and the reversing valve 3 is located in the first mounting cavity; the first air intake channel 4 includes a first air intake section 41 provided in the housing 11 and a second air intake section 42 provided in the first end cover 12; the second air intake channel 5 includes a first input section 51 provided in the housing 11 and a second input section 52 provided in the second end cover 13; the first exhaust channel 6 includes a first exhaust section 61 provided in the housing 11 and a second exhaust section 62 provided in the first end cover 12; the second exhaust channel 7 includes a first output section 71 provided in the housing 11 and a second output section 72 provided in the second end cover 13.

[0052] Understandably, the first intake section 41 and the second intake section 42 are connected to enable the first airbag 21 to connect with one of the air outlets of the reversing valve 3; the first input section 51 and the second input section 52 are connected to enable the second airbag 22 to connect with the other air outlet of the reversing valve 3; the first exhaust section 61 and the second exhaust section 62 are connected to enable the reversing valve 3 to connect with one of the exhaust inlets of the first airbag 21; and the first output section 71 and the second output section 72 are connected to enable the reversing valve 3 to connect with the other exhaust inlet of the second airbag 22.

[0053] Since the first air intake channel 4 includes a first air intake section 41 located on the housing 11 and a second air intake section 42 located on the first end cover 12, the molding difficulty of the first air intake channel 4 is reduced; the second air intake channel 5 includes a first input section 51 located on the housing 11 and a second input section 52 located on the second end cover 13, the molding difficulty of the second air intake channel 5 is reduced; the first exhaust channel 6 includes a first exhaust section 61 located on the housing 11 and a second exhaust section 62 located on the first end cover 12, the molding difficulty of the first exhaust channel 6 is reduced; the second exhaust channel 7 includes a first output section 71 located on the housing 11 and a second output section 72 located on the second end cover 13, the molding difficulty of the second exhaust channel 7 is reduced, thereby reducing the production difficulty of the pump housing 1 and thus reducing the production cost of the airbag pump.

[0054] Furthermore, refer to Figure 1 The second air intake section 42 has a first process opening 421 located on the outer peripheral surface of the first end cover 12, and the first end cover 12 is provided with a first sealing plug that extends into the second air intake section 42 and is used to seal the first process opening 421.

[0055] It is understood that the second air intake section 42 includes two branch channels that are respectively connected to the first air bag 21 and the first air intake section 41, and a convergence channel located between the two branch channels. The convergence channel extends toward the outer peripheral surface of the first end cover 12 and forms a first process orifice 421 on the outer peripheral surface of the first end cover 12. The first sealing plug is fixedly connected to the first end cover 12 and extends into the second air intake section 42 through the first process orifice 421 to achieve sealing of the first process orifice 421 by the first sealing plug.

[0056] Since the second air intake section 42 has a first process opening 421 located on the outer peripheral surface of the first end cover 12, the second air intake section 42 can be formed inside the first end cover 12 by drilling or pre-drilling, thereby reducing the molding difficulty of the second air intake section 42 and reducing the production cost of the first end cover 12, so as to further reduce the production cost of the airbag pump.

[0057] Furthermore, since the first end cap 12 is provided with a first sealing plug that extends into the second air intake section 42 and is used to seal the first process orifice 421, the sealing performance of the second air intake section 42 can be guaranteed, thereby ensuring the sealing performance of the first air intake channel 4 and thus ensuring the working efficiency of the airbag pump.

[0058] Furthermore, refer to Figure 1 The second input section 52 has a second process opening 521 located on the outer peripheral surface of the second end cover 13, and the second end cover 13 is provided with a second sealing plug that extends into the second input section 52 and is used to seal the second process opening 521.

[0059] It is understood that the second input section 52 includes two branch channels that are respectively connected to the second air bag 22 and the first input section 51, and a convergence channel located between the two branch channels. The convergence channel extends toward the outer peripheral surface of the second end cover 13 and forms a second process orifice 521 on the outer peripheral surface of the second end cover 13. The second sealing plug is fixedly connected to the second end cover 13 and extends into the second input section 52 through the second process orifice 521 to achieve sealing of the second process orifice 521 by means of the second sealing plug.

[0060] Since the second input section 52 has a second process opening 521 located on the outer peripheral surface of the second end cover 13, the second input section 52 can be formed inside the second end cover 13 by drilling or pre-drilling, thereby reducing the molding difficulty of the second input section 52 and reducing the production cost of the second end cover 13, so as to further reduce the production cost of the airbag pump.

[0061] Furthermore, since the second end cap 13 is provided with a second sealing plug that extends into the second input section 52 and is used to seal the second process orifice 521, the sealing performance of the second input section 52 can be guaranteed, thereby ensuring the sealing performance of the second air intake channel 5 and thus ensuring the working efficiency of the airbag pump.

[0062] Furthermore, refer to Figure 1 The second exhaust section 62 has a third process opening 621 located on the outer peripheral surface of the first end cover 12, and the first end cover 12 is provided with a third sealing plug that extends into the second exhaust section 62 and is used to seal the third process opening 621.

[0063] It is understood that the second exhaust section 62 includes two branch channels that are respectively connected to the first air bag 21 and the first exhaust section 61, and a converging channel located between the two branch channels. The converging channel extends toward the outer peripheral surface of the first end cover 12 and forms a third process orifice 621 on the outer peripheral surface of the first end cover 12. The third sealing plug is fixedly connected to the first end cover 12 and extends into the second exhaust section 62 through the third process orifice 621 to achieve sealing of the third process orifice using the third sealing plug.

[0064] Since the second exhaust section 62 has a third process opening 621 located on the outer peripheral surface of the first end cover 12, the second exhaust section 62 can be formed inside the first end cover 12 by drilling or pre-drilling, thereby reducing the molding difficulty of the second exhaust section 62 and reducing the production cost of the first end cover 12, so as to further reduce the production cost of the airbag pump.

[0065] Furthermore, since the first end cap 12 is provided with a third sealing plug that extends into the second exhaust section 62 and is used to seal the third process orifice 621, the sealing performance of the second exhaust section 62 can be guaranteed, thereby ensuring the sealing performance of the first exhaust channel 6 and thus ensuring the working efficiency of the airbag pump.

[0066] Furthermore, refer to Figure 1 The second output section 72 has a fourth process port 721 located on the outer peripheral surface of the second end cover 13, and the second end cover 13 is provided with a fourth sealing plug that extends into the second output section 72 and is used to seal the fourth process port 721.

[0067] It is understood that the second output section 72 includes two branch channels that are respectively connected to the second air bag 22 and the first output section 71, and a convergence channel located between the two branch channels. The convergence channel extends toward the outer peripheral surface of the second end cover 13 and forms a fourth process orifice 721 on the outer peripheral surface of the second end cover 13. The fourth sealing plug is fixedly connected to the second end cover 13 and extends into the second output section 72 through the fourth process orifice 721, so as to seal the fourth process orifice 721 by means of the fourth sealing plug.

[0068] Since the second output section 72 has a fourth process opening 721 located on the outer peripheral surface of the second end cover 13, the second output section 72 can be formed inside the second end cover 13 by drilling or pre-drilling, thereby reducing the molding difficulty of the second output section 72 and reducing the production cost of the second end cover 13, so as to further reduce the production cost of the airbag pump.

[0069] Furthermore, since the second end cap 13 is provided with a fourth sealing plug that extends into the second output section 72 and is used to seal the fourth process orifice 721, the sealing performance of the second output section 72 can be guaranteed, thereby ensuring the sealing performance of the second exhaust channel 7 and thus ensuring the working efficiency of the airbag pump.

[0070] Furthermore, refer to Figure 2 and Figure 5 The pump housing 1 is provided with an inlet channel 111 and an outlet channel 112. The pump housing 1 is provided with two second mounting cavities located between the first accommodating space and the second accommodating space. The airbag pump also includes two sets of one-way valve assemblies 9. The two sets of one-way valve assemblies 9 are respectively provided for the first airbag 21 and the second airbag 22, and the two sets of one-way valve assemblies 9 are respectively located in the two second mounting cavities. The inlet and outlet of each set of one-way valve assemblies 9 are connected to the inlet channel 111 and the outlet channel 112, respectively. The air inlets of the two sets of one-way valve assemblies 9 are connected to the first accommodating space and the second accommodating space, respectively, so that the valve balls inside the two sets of one-way valve assemblies 9 can be driven by the gas in the first accommodating space and the second accommodating space.

[0071] This application does not specify the method of fixing the first end cap 12 and the second end cap 13 to the housing 11. Preferably, refer to Figures 1 to 4 The pump housing 1 also includes a fixing bolt pair 14. The bolt of the fixing bolt pair 14 passes through the first end cover 12, the housing 11 and the second end cover 13. The bolt head and nut of the fixing bolt pair 14 are respectively tightened against the first end cover 12 and the second end cover 13.

[0072] Understandably, the fixing bolt assembly 14 includes a bolt and a nut threaded onto the bolt, the bolt having a thread and a bolt head located at one end of the thread.

[0073] Since the screw of the fixing bolt pair 14 passes through the first end cover 12, the housing 11 and the second end cover 13, the bolt head and nut of the fixing bolt pair 14 are respectively pressed against the first end cover 12 and the second end cover 13. Then, the first end cover 12 and the second end cover 13 can be fixedly connected to the housing 11 by the mutual compression of the bolt head and nut of the fixing bolt pair 14 against the first end cover 12, the housing 11 and the second end cover 13, so as to increase the connection stability of the first end cover 12 and the second end cover 13 with the housing 11, and at the same time, it can also increase the sealing between the first end cover 12 and the second end cover 13 and the housing 11 to ensure the working efficiency of the airbag pump.

[0074] Preferably, multiple fixing bolt pairs 14 are provided at circumferential intervals along the first end cover 12 and the second end cover 13 to increase the number of connection points between the first end cover 12 and the second end cover 13 and the housing 11, thereby increasing the connection stability between the first end cover 12 and the second end cover 13 and the housing 11.

[0075] In other embodiments, the first end cap 12 and the second end cap 13 may also be connected to the housing 11 by means of screws or by means of adhesive.

[0076] Furthermore, refer to Figure 4 The first end cap 12 is provided with a first protrusion 121, which extends into the interior of the first air bag 21.

[0077] Since the first end cap 12 is provided with a first protrusion 121, which extends into the interior of the first air bag 21, the first protrusion 121 can limit the compression stroke of the first air bag 21 on the one hand, and guide the first air bag 21 on the other hand, thereby increasing the stability of the first air bag 21 during expansion and contraction.

[0078] Preferably, the first boss 121 is integrally formed on the first end cap 12 to increase the connection stability between the first boss 121 and the first end cap 12 and reduce the number of parts required to be assembled when producing the airbag pump, thereby reducing the assembly cost of the airbag pump and improving the production efficiency of the airbag pump.

[0079] Furthermore, refer to Figure 4 The second end cap 13 is provided with a second protrusion 131, which extends into the interior of the second air bag 22.

[0080] Since the second end cap 13 is provided with a second protrusion 131, which extends into the interior of the second air bag 22, the second protrusion 131 can limit the compression stroke of the second air bag 22 on the one hand, and guide the second air bag 22 on the other hand, thereby increasing the stability of the second air bag 22 during expansion and contraction.

[0081] Preferably, the second boss 131 is integrally formed on the second end cap 13 to increase the connection stability between the second boss 131 and the second end cap 13 and reduce the number of parts required for assembly during the production of the airbag pump, thereby reducing the assembly cost of the airbag pump and improving the production efficiency of the airbag pump.

[0082] This application does not specify the fixing method of the first airbag 21 and the second airbag 22. Preferably, refer to Figure 4 The first airbag 21 is provided with a first edge located between the first end cap 12 and the housing 11, so as to fix the first airbag 21 by the mutual compression of the first end cap 12 and the housing 11 against the first edge; the second airbag 22 is provided with a second edge located between the second end cap 13 and the housing 11, so as to fix the second airbag 22 by the mutual compression of the second end cap 13 and the housing 11 against the second edge. In other embodiments, the first airbag 21 and the second airbag 22 can also be fixed by adhesive or flange fixing.

[0083] In other embodiments, the pump housing 1 may also include a box body with an open top and a cover on the top of the box body. The cover is used to seal the open top of the box body, and the first air intake channel 4, the second air intake channel 5, the first exhaust channel 6 and the second exhaust channel 7 are all located only inside the box body.

[0084] In a preferred embodiment, refer to Figure 7 and Figure 8 The pump housing 1 includes a housing 11, a first end cover 12 located at one end of the housing 11, and a second end cover 13 located at the other end of the housing 11. One of the first end cover 12 and the housing 11 is provided with a first positioning groove 113, and the other is provided with a first positioning rib 122 extending into the first positioning groove 113.

[0085] Since one of the first end cap 12 and the housing 11 is provided with a first positioning groove 113, and the other is provided with a first positioning rib 122 extending into the first positioning groove 113, the first positioning rib 122 and the first positioning groove 113 can be used to position and limit the first end cap 12 and the housing 11, thereby increasing the connection stability between the first end cap 12 and the housing 11. At the same time, it can also facilitate the installation of the fixing bolt pair 14, thereby reducing the assembly difficulty of the fixing bolt pair 14 and further reducing the assembly cost of the airbag pump.

[0086] This application does not specifically limit the location of the first positioning groove 113 and the first positioning rib 122. Preferably, the first positioning groove 113 is located at the end of the housing 11, and the first positioning rib 122 is located at the end of the first end cover 12, so that the first positioning rib 122 can be used to increase the structural strength of the first end cover 12. Of course, in other embodiments, the first positioning groove 113 can also be located at the end of the first end cover 12, and the first positioning rib 122 can be located at the end of the housing 11.

[0087] Preferably, the first positioning groove 113 extends circumferentially along the housing 11, and the first positioning rib 122 is adapted to the first positioning groove 113.

[0088] Understandably, the first positioning rib 122 is also provided to extend circumferentially along the shell 11.

[0089] Since the first positioning groove 113 extends circumferentially along the housing 11, and the first positioning rib 122 is adapted to the first positioning groove 113, it can increase the mating area of ​​the first positioning rib 122 and the first positioning groove 113, thereby increasing the positioning and limiting effect of the first positioning rib 122 and the first positioning groove 113 on the first end cover 12 and the housing 11. On the other hand, it can also increase the contact area between the first end cover 12 and the housing 11, thereby increasing the sealing between the first end cover 12 and the housing 11, and further ensuring the working efficiency of the airbag pump.

[0090] Furthermore, a first sealing ring 115 is provided in the first positioning groove 113, and the first positioning rib 122 can apply a compressive force to the first sealing ring 115.

[0091] Understandably, after the first end cap 12 and the second end cap 13 are fixedly connected to the housing 11 using the fixing bolt pair 14, the first positioning rib 122 can apply a compressive force to the first sealing ring 115 under the action of the fixing bolt pair 14 and the first end cap 12, so as to deform the first sealing ring 115.

[0092] Since the first sealing ring 115 is provided in the first positioning groove 113, the first positioning rib 122 can apply a compressive force to the first sealing ring 115, and then the first sealing ring 115 can be used to seal the gap between the first positioning rib 122 and the first positioning groove 113, so as to further increase the sealing performance between the first end cover 12 and the housing 11, thereby further ensuring the sealing performance of the airbag pump, and further ensuring the working efficiency of the airbag pump.

[0093] Furthermore, the pump housing 1 also includes a first sealing gasket, which is located between the first end cap 12 and the housing 11.

[0094] It is understandable that the first sealing gasket is provided with a perforated structure corresponding to the first air intake channel 4 and the first exhaust channel 6, so as to ensure that the first air intake channel 4 and the first exhaust channel 6 can be connected to the first air bag 21.

[0095] Since the pump casing 1 also includes a first sealing gasket, which is located between the first end cover 12 and the housing 11, the first sealing gasket can be deformed by the mutual compression of the first end cover 12 and the housing 11, thereby further increasing the sealing between the first end cover 12 and the housing 11, so as to further ensure the sealing of the airbag pump, and further ensure the working efficiency of the airbag pump.

[0096] This application does not specifically limit the materials used to manufacture the first sealing ring 115 and the first sealing gasket. Preferably, both the first sealing ring 115 and the first sealing gasket are made of fluororubber to improve their acid and alkali resistance. In other embodiments, the first sealing ring 115 and the first sealing gasket may also be made of other materials with sealing properties.

[0097] Reference Figure 7 and Figure 9 In a preferred embodiment, one of the second end cap 13 and the housing 11 is provided with a second positioning groove 114, and the other is provided with a second positioning rib 132 extending into the second positioning groove 114.

[0098] Since one of the second end cap 13 and the housing 11 is provided with a second positioning groove 114, and the other is provided with a second positioning rib 132 extending into the second positioning groove 114, the second positioning rib 132 and the second positioning groove 114 can be used to position and limit the second end cap 13 and the housing 11, thereby increasing the connection stability between the second end cap 13 and the housing 11. At the same time, it can also facilitate the installation of the fixing bolt pair 14, thereby reducing the assembly difficulty of the fixing bolt pair 14 and further reducing the assembly cost of the airbag pump.

[0099] This application does not specifically limit the location of the second positioning groove 114 and the second positioning rib 132. Preferably, the second positioning groove 114 is located at the end of the housing 11, and the second positioning rib 132 is located at the end of the second end cover 13, so that the structural strength of the second end cover 13 can be increased by utilizing the second positioning rib 132. Of course, in other embodiments, the second positioning groove 114 may also be located at the end of the second end cover 13, and the second positioning rib 132 may be located at the end of the second housing 11.

[0100] Preferably, the second positioning groove 114 extends circumferentially along the housing 11, and the second positioning rib 132 is adapted to the second positioning groove 114.

[0101] Understandably, the second positioning groove 114 is also provided to extend circumferentially along the housing 11.

[0102] Since the second positioning groove 114 extends circumferentially along the housing 11, and the second positioning rib 132 is adapted to the second positioning groove 114, it can increase the mating area between the second positioning rib 132 and the second positioning groove 114, thereby increasing the positioning and limiting effect of the second positioning rib 132 and the second positioning groove 114 on the second end cover 13 and the housing 11. On the other hand, it can also increase the contact area between the second end cover 13 and the housing 11, thereby increasing the sealing between the second end cover 13 and the housing 11, and further ensuring the working efficiency of the airbag pump.

[0103] Furthermore, a second sealing ring 116 is provided in the second positioning groove 114, and the second positioning rib 132 can apply a compressive force to the second sealing ring 116.

[0104] It is understandable that after the first end cap 12 and the second end cap 13 are installed on the housing 11 by the fixing bolt pair 14, the second positioning rib 132 can apply a compressive force to the second sealing ring 116 under the action of the fixing bolt pair 14 and the second end cap 13, so as to deform the second sealing ring 116.

[0105] Since the second positioning groove 114 is provided with a second sealing ring 116, the second positioning rib 132 can apply a compressive force to the second sealing ring 116, thereby sealing the gap between the second positioning rib 132 and the second positioning groove 114 by the second sealing ring 116, so as to further increase the sealing performance between the second end cover 13 and the housing 11, thereby further ensuring the sealing performance of the airbag pump, and further ensuring the working efficiency of the airbag pump.

[0106] Furthermore, the pump housing 1 also includes a second sealing gasket, which is located between the second end cap 13 and the housing 11.

[0107] It is understandable that the second sealing gasket is provided with a perforated structure corresponding to the second air intake channel 5 and the second exhaust channel 7, so as to enable the second airbag 22 to connect with the second air intake channel 5 and the second exhaust channel 7.

[0108] Since the pump casing 1 also includes a second sealing gasket, which is located between the second end cover 13 and the housing 11, the second sealing gasket can be deformed by the mutual compression of the second end cover 13 and the housing 11, thereby further increasing the sealing between the second end cover 13 and the housing 11, so as to further ensure the sealing of the airbag pump, and thus further ensure the working efficiency of the airbag pump.

[0109] This application does not specifically limit the materials used to manufacture the second sealing ring 116 and the second sealing gasket. Preferably, both the second sealing ring 116 and the second sealing gasket are made of fluororubber to improve their acid and alkali resistance. In other embodiments, the second sealing ring 116 and the second sealing gasket can also be made of other materials with sealing properties.

[0110] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0111] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0112] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. A wind-bag pump, characterized in that, The system includes a pump housing (1), an air bag assembly (2) disposed inside the pump housing (1), and a reversing valve (3) disposed inside the pump housing (1). The air bag assembly (2) includes a first air bag (21) and a second air bag (22). The pump housing (1) is provided with a first air intake channel (4), a second air intake channel (5), a first exhaust channel (6), a second exhaust channel (7), and a connecting channel (8). The first air intake channel (4) is used to connect the first air bag (21) and one of the air outlets of the reversing valve (3). The second air intake channel (5) is used to connect the second air bag (22) and the other air outlet of the reversing valve (3). The first exhaust channel (6) is used to connect the first air bag (21) and one of the exhaust inlets of the reversing valve (3). The second exhaust channel (7) is used to connect the second air bag (22) and the other exhaust inlet of the reversing valve (3). The connecting channel (8) is used to connect the air intake of the reversing valve (3) and a pipeline for delivering compressed air.

2. The airbag pump according to claim 1, characterized in that, The pump housing (1) includes a housing (11), a first end cap (12) disposed at one end of the housing (11), and a second end cap (13) disposed at the other end of the housing (11). The housing (11) has a first accommodating space and a second accommodating space inside. The first air bag (21) is located in the first accommodating space, and the second air bag (22) is located in the second accommodating space. The first end cap (12) is used to seal the first accommodating space, and the second end cap (13) is used to seal the second accommodating space.

3. The airbag pump according to claim 2, characterized in that, The housing (11) has a first mounting cavity inside, and the reversing valve (3) is located in the first mounting cavity; the first air intake channel (4) includes a first air intake section (41) provided on the housing (11) and a second air intake section (42) provided on the first end cover (12); the second air intake channel (5) includes a first input section (51) provided on the housing (11) and a second input section (52) provided on the second end cover (13); the first exhaust channel (6) includes a first exhaust section (61) provided on the housing (11) and a second exhaust section (62) provided on the first end cover (12); the second exhaust channel (7) includes a first output section (71) provided on the housing (11) and a second output section (72) provided on the second end cover (13).

4. The airbag pump according to claim 3, characterized in that, The second air intake section (42) has a first process opening (421) located on the outer peripheral surface of the first end cap (12), and the first end cap (12) is provided with a first sealing plug extending into the second air intake section (42) and used to seal the first process opening (421); And / or, the second input segment (52) has a second process opening (521) located on the outer peripheral surface of the second end cap (13), and the second end cap (13) is provided with a second sealing plug extending into the second input segment (52) for sealing the second process opening (521); And / or, the second exhaust section (62) has a third process opening (621) located on the outer peripheral surface of the first end cap (12), and the first end cap (12) is provided with a third sealing plug extending into the second exhaust section (62) for sealing the third process opening (621); And / or, the second output section (72) has a fourth process opening (721) located on the outer peripheral surface of the second end cap (13), and the second end cap (13) is provided with a fourth sealing plug extending into the second output section (72) for sealing the fourth process opening (721).

5. A wind bag pump according to claim 2, characterized in that, The pump housing (1) also includes a fixing bolt pair (14), the bolt of the fixing bolt pair (14) passes through the first end cover (12), the housing (11) and the second end cover (13), and the bolt head and nut of the fixing bolt pair (14) are respectively pressed against the first end cover (12) and the second end cover (13).

6. A wind-bag pump according to claim 2, characterized in that, The first end cap (12) is provided with a first protrusion (121), which extends into the interior of the first air bag (21); And / or, the second end cap (13) is provided with a second boss (131) that extends into the interior of the second air bag (22).

7. A wind bag pump according to any one of claims 1-6, characterized in that, The pump casing (1) includes a housing (11), a first end cap (12) located at one end of the housing (11), and a second end cap (13) located at the other end of the housing (11). One of the first end cap (12) and the housing (11) is provided with a first positioning groove (113), and the other is provided with a first positioning rib (122) extending into the first positioning groove (113). One of the second end cap (13) and the housing (11) is provided with a second positioning groove (114), and the other is provided with a second positioning rib (132) extending into the second positioning groove (114).

8. A wind-bag pump according to claim 7, characterized in that, The first positioning groove (113) extends circumferentially along the housing (11), and the first positioning rib (122) is adapted to the first positioning groove (113); And / or, the second positioning groove (114) extends circumferentially along the housing (11), and the second positioning rib (132) is adapted to the second positioning groove (114).

9. A wind-bag pump according to claim 7, characterized in that, A first sealing ring (115) is provided in the first positioning groove (113), and the first positioning rib (122) can apply a compressive force to the first sealing ring (115); And / or, a second sealing ring (116) is provided in the second positioning groove (114), and the second positioning rib (132) can apply a compressive force to the second sealing ring (116).

10. A wind-bag pump according to claim 7, characterized in that, The pump housing (1) further includes a first sealing gasket, which is located between the first end cap (12) and the housing (11); And / or, the pump housing (1) further includes a second sealing gasket located between the second end cap (13) and the housing (11).

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