Pneumatic air bag pump

Abstract

The utility model discloses a pneumatic air bag pump which comprises a pump body and a separating type reversing valve, the pump body comprises a center pump body, a first air bag assembly, a second air bag assembly and a center rod, the first air bag assembly and the second air bag assembly are oppositely arranged at the two ends of the center pump body, and the center rod is arranged between the first air bag assembly and the second air bag assembly; a sealing piece is arranged at the joint of the piston rod and the central pump body; the separated reversing valve is arranged on one side of the pump body and connected with the two ends of the pump body through the air supply pipeline assembly. According to the pneumatic air bag pump, the structure of the air bag pump is improved, compressed air enters the first air bag assembly or the second air bag assembly through the separation type reversing valve to push the air bag assemblies to do left-right telescopic motion, and therefore the volume of the left cavity and the volume of the right cavity of the center pump body are changed, and alternate liquid suction and drainage of the left cavity and the right cavity are achieved; and the use requirements can be better met.

Description

Technical Field

[0001] This utility model belongs to the field of pump technology, and specifically relates to a pneumatic airbag pump. Background Technology

[0002] Pneumatic airbag pumps are used in many industries. They typically include two fluid chambers within the pump body. Existing pneumatic airbag pumps have a relatively complex structure, leading to difficulties in maintenance and short service life. Some existing pneumatic airbag pumps are made of metal, which can cause metal contamination of the medium during use, affecting its purity. Therefore, the current technology needs improvement. Utility Model Content

[0003] Purpose of the utility model: In order to overcome the above shortcomings, the purpose of this utility model is to provide a pneumatic airbag pump with a simple structure, reasonable design and easy production. By improving the structure of the airbag pump, compressed air enters the first airbag assembly or the second airbag assembly through a separate reversing valve, which drives the airbag assembly to move left and right, thereby changing the volume of the left and right cavities of the central pump body, realizing the alternating suction and discharge of liquid in the left and right cavities, so as to better meet the needs of use.

[0004] Technical solution: To achieve the above objectives, this utility model provides a pneumatic airbag pump, comprising:

[0005] The pump body includes a central pump body, a first airbag assembly, a second airbag assembly, and a central rod. The first airbag assembly and the second airbag assembly are disposed opposite each other at both ends of the central pump body, and the central rod is disposed between the first airbag assembly and the second airbag assembly. A sealing element is provided at the connection between the central rod and the central pump body.

[0006] A separate reversing valve is located on one side of the pump body and connected to both ends of the pump body via an air supply pipeline assembly. This utility model discloses a pneumatic airbag pump. By improving the structure of the airbag pump, compressed air enters the first or second airbag assembly through the separate reversing valve, driving the airbag assembly to extend and retract left and right, thereby changing the volume of the left and right chambers of the central pump body. This allows for alternating suction and discharge of liquid between the left and right chambers, better meeting the needs of use.

[0007] The separate reversing valve includes a reversing valve body and a reversing assembly. The reversing valve body has a cavity, and a first air supply channel, a second air supply channel, a third air supply channel, and a fourth air supply channel are respectively provided on both sides of the cavity. The reversing valve body also has a first exhaust port and a second exhaust port on both sides. The reversing assembly is located inside the cavity.

[0008] Furthermore, the reversing assembly includes a reversing valve stem and an exhaust pipe, the exhaust pipe having a first cavity, the reversing valve stem being disposed within the first cavity of the exhaust pipe, and the length of the reversing valve stem being less than the height of the first cavity;

[0009] The exhaust pipe is equipped with a first seal and a second seal at both ends. Compressed air enters the first or second airbag assembly through a split reversing valve, pushing the first or second airbag assembly to extend and retract left and right. When the first or second airbag assembly reaches the correct position, the compressed air enters the reversing valve stem, pushing the reversing valve stem to change position, thereby switching the compressed air inlet and outlet pipelines and changing the movement direction of the first and second airbag assemblies. This changes the original liquid-absorbing chamber to a liquid-draining chamber and vice versa. After the compressed air is cut off, the compressed air in the supply pipeline is automatically discharged, preventing pressure on the airbag.

[0010] Preferably, the directional valve stem is provided with a first groove and a second groove.

[0011] Furthermore, the exhaust pipe has multiple sets of exhaust holes circumferentially from bottom to top, and the reversing valve body has a set of air guides located outside the exhaust holes.

[0012] The first and second seals are provided with air supply channels.

[0013] The central pump body includes a central pump casing, with an inlet and an outlet on one side of the central pump casing, and an inlet channel and an outlet channel inside, which are respectively connected to the inlet and the outlet.

[0014] It also includes a first channel and a second channel, which are arranged vertically and communicate with the inlet channel and the outlet channel; there are cavities on both sides of the first channel and the second channel, and the first airbag assembly and the second airbag assembly are located in the corresponding cavities. The two ends are threadedly connected to the central pump housing through end caps, and there is a cavity between the first airbag assembly, the second airbag assembly and the corresponding cavities.

[0015] Furthermore, both the first and second channels are equipped with liquid suction adjustment mechanisms. During operation, compressed gas enters the first or second airbag assembly through a separate reversing valve, pushing the first or second airbag assembly to extend and retract left and right. When the first or second airbag assembly reaches the correct position, compressed gas enters the reversing valve stem, pushing the reversing valve stem to change position, thereby switching the compressed gas inlet and outlet pipelines and changing the movement direction of the first and second airbag assemblies. When the movement direction of the first and second airbag assemblies changes, the change in their cavities will adjust the position of the liquid suction adjustment mechanisms in the first and second channels, thereby changing the original liquid suction cavity to liquid discharge cavity and the liquid discharge cavity to liquid suction cavity.

[0016] Preferably, the liquid suction regulating mechanism includes a support tube, a valve body is provided above the support tube, and regulating valves are provided in both the support tube and the valve body;

[0017] The lower inner wall of the support tube is tapered, and its opening diameter is smaller than that of the regulating valve.

[0018] The valve body includes an upper valve body and a lower valve body, which are threadedly connected to the central pump body. The lower valve body has a set of perforations circumferentially located at its lower part, and is connected to the corresponding chamber via a liquid guiding assembly on the outer side of these perforations. The upper valve body has an adjustment chamber, and an adjustment valve is located within this chamber. The diameter of the lower valve body is smaller than the diameter of the adjustment valve. During operation, changes in the movement direction of the first and second airbag assemblies adjust the positions of the adjustment valves in the first and second channels, thereby controlling the liquid flow path of the pump body.

[0019] Both the first airbag assembly and the second airbag assembly include an airbag and an airbag driving assembly. The airbag is disposed inside the airbag cavity, and the airbag driving assembly is disposed inside the airbag. The airbag driving assembly is provided with a first piston rod, one end of which passes through the airbag body and extends into the plunger of the airbag.

[0020] The air supply pipeline assembly includes a first air supply pipeline, a second air supply pipeline, a third air supply pipeline and a fourth air supply pipeline. One end of the first air supply pipeline is connected to the air supply channel of the first seal, and the other end is connected to the airbag drive assembly inside the first airbag assembly.

[0021] One end of the second air supply pipe is connected to the air guide corresponding to the outside of the second groove, and the other end is connected to the first airbag assembly;

[0022] One end of the third air supply pipe is connected to the air guide corresponding to the outside of the first groove, and the other end is connected to the second airbag assembly;

[0023] One end of the fourth air supply pipe is connected to the air supply channel of the second seal, and the other end is connected to the airbag drive assembly inside the second airbag assembly.

[0024] The airbag has a groove at one end near the piston rod, and the groove opening is inclined to the end face of the airbag column. The piston rod has a circumferentially inclined surface at its end, which mates with the groove. The fit between the groove and the inclined surface improves the sealing between the piston rod and the airbag.

[0025] As can be seen from the above technical solution, this utility model has the following beneficial effects:

[0026] 1. The pneumatic airbag pump described in this utility model improves the structure of the airbag pump. Compressed air enters the first airbag assembly or the second airbag assembly through a separate reversing valve, which drives the airbag assembly to extend and retract left and right, thereby changing the volume of the left and right cavities of the central pump body and realizing the alternating suction and discharge of liquid in the left and right cavities, so as to better meet the needs of use.

[0027] 2. The split-type reversing valve described in this utility model adopts a unique structural design. Compressed air enters the first or second airbag assembly through the split-type reversing valve, pushing the first or second airbag assembly to extend and retract left and right. When the first or second airbag assembly moves to the correct position, the compressed air enters the reversing valve stem, pushing the reversing valve stem to change position, thereby switching the compressed air inlet and outlet pipelines, pushing the first and second airbag assemblies to change their movement direction, thus changing the original liquid-absorbing chamber to liquid-draining chamber and the liquid-draining chamber to liquid-absorbing chamber. After the compressed air is cut off, the compressed air in the air supply pipeline is automatically discharged, which will not cause the airbag to be pressurized.

[0028] 3. The airbag has a groove at one end near the piston rod, and the groove opening is inclined to the end face of the airbag column. The piston rod has a circumferentially inclined surface at its end, which mates with the groove. The fit between the groove and the inclined surface improves the sealing between the piston rod and the airbag. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the pneumatic airbag pump described in this utility model;

[0030] Figure 2 This is a schematic diagram of the internal structure of the split-type directional valve described in this utility model;

[0031] Figure 3 This is a cross-sectional view of the split-type directional valve in this utility model;

[0032] Figure 4 This is a schematic diagram of the cross-sectional structure of the pump body in this utility model;

[0033] Figure 5 This is a schematic diagram of the longitudinal section of the pump body in this utility model;

[0034] Figure 6 This is a schematic diagram showing the pneumatic airbag pump of this utility model in operation with left suction and right discharge states;

[0035] Figure 7 This is a schematic diagram showing the pneumatic airbag pump of this utility model in a right-intake, left-exhaust state during operation. Detailed Implementation

[0036] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. Example

[0037] like Figures 1 to 7 The pneumatic airbag pump shown includes: a pump body 1 and a separate reversing valve 2. The pump body 1 includes a central pump body 11, a first airbag assembly 12, a second airbag assembly 13, and a central rod 14. The first airbag assembly 12 and the second airbag assembly 13 are disposed opposite to each other at both ends of the central pump body 11. The central rod 14 is disposed between the first airbag assembly 12 and the second airbag assembly 13. A sealing element 15 is provided at the connection between the central rod 14 and the central pump body 11.

[0038] The separate reversing valve 2 is located on one side of the pump body 1 and is connected to both ends of the pump body 1 through the air supply pipeline assembly 3. It should be noted that all liquid-contacting parts of the pneumatic airbag pump are made of high-purity PTFE / PFA material, with no ion release. The special overall metal-free design ensures that even if the airbag is damaged, there will be no metal ion contamination of chemicals. The precision-machined airbag has a cycle life of up to 100 million cycles and can operate continuously for 24 hours without maintenance.

[0039] like Figure 2 , Figure 3 The shown split-type reversing valve 2 includes a reversing valve body 21 and a reversing assembly 22. One side is provided with an inlet and an outlet. The reversing valve body 21 has a cavity. On both sides of the cavity, there are a first air supply channel 211, a second air supply channel 212, a third air supply channel 213, and a fourth air supply channel 214, respectively. On both sides of the reversing valve body 21, there are a first vent 215 and a second vent 216, respectively. The reversing assembly 22 is located in the cavity.

[0040] like Figure 3 The reversing assembly 22 shown includes a reversing valve stem 221 and an exhaust pipe 222. The exhaust pipe 222 has a first cavity. The reversing valve stem 221 is located in the first cavity of the exhaust pipe 222, and the length of the reversing valve stem 221 is less than the height of the first cavity.

[0041] The exhaust pipe 222 is provided with a first sealing element 223 and a second sealing element 224 at both ends. It should be noted that both the reversing valve stem 221 and the exhaust pipe 222 are made of ceramic material, which can achieve good wear resistance and corrosion resistance. It can be imagined that the materials of the reversing valve stem 221 and the exhaust pipe 222 can be selected according to actual needs.

[0042] The reversing valve stem 221 is provided with a first groove 2211 and a second groove 2212.

[0043] The exhaust pipe 222 has multiple sets of exhaust holes circumferentially from bottom to top, and the reversing valve body 21 has a set of air guides 217 located outside the exhaust holes.

[0044] The first seal 223 and the second seal 224 are provided with air supply channels.

[0045] The central pump body 11 includes a central pump housing 111. The central pump housing 111 has an inlet and an outlet on one side and an inlet channel and an outlet channel inside. The inlet channel and the outlet channel are respectively connected to the inlet and the outlet.

[0046] like Figure 5 The diagram also includes a first channel and a second channel, which are arranged vertically and communicate with the inlet channel and the outlet channel; bladder cavities 112 are provided on both sides of the first channel and the second channel, and the first airbag assembly 12 and the second airbag assembly 13 are located in the corresponding bladder cavities 112, with both ends threadedly connected to the central pump housing 111 through end caps 113; a cavity is provided between the first airbag assembly 12, the second airbag assembly 13 and the corresponding bladder cavities 112.

[0047] Furthermore, both the first and second channels are equipped with a liquid suction adjustment mechanism 114. It should be noted that the liquid suction adjustment mechanism 114 can be selected with a suitable structure according to actual needs.

[0048] The liquid suction regulating mechanism 114 includes a support tube 1141, a valve body 1142 is provided above the support tube 1141, and regulating valves 1143 are provided in both the support tube 1141 and the valve body 1142.

[0049] The lower inner wall of the support pipe 1141 is tapered, and its opening diameter is smaller than that of the regulating valve 1143. It should be noted that the regulating valve 1143 is preferably a ball valve in this case. The regulating valve 1143 cooperates with the tapered inclined surface of the lower inner wall of the support pipe 1141 to play a good sealing role and effectively improve the pump's self-priming ability.

[0050] The valve body 1142 includes an upper valve body 11421 and a lower valve body 11422. The 11421 is threadedly connected to the central pump body 11. The lower valve body 11422 has a set of perforations circumferentially arranged at its lower part, and the outer side of these perforations is connected to the corresponding bladder cavity 112 via a liquid guiding assembly 1144. The upper valve body 11421 has an adjustment chamber, and the adjustment valve 1143 is located within this chamber. The diameter of the lower valve body 11422 is smaller than the diameter of the adjustment valve 1143. The conical surface of the adjustment valve 1143 fits more closely to the lower valve body 1142, effectively improving sealing and increasing the pump's self-priming capability.

[0051] Both the first airbag assembly 12 and the second airbag assembly 13 include an airbag 121 and an airbag driving assembly 122. The airbag 121 is disposed in the airbag cavity 113, and the airbag driving assembly 122 is disposed in the airbag 121. The airbag driving assembly 122 is provided with a first piston rod 1221, one end of which passes through the airbag body of the airbag 121 and extends into the plunger of the airbag 121.

[0052] The air supply pipeline assembly 3 includes a first air supply pipeline 31, a second air supply pipeline 32, a third air supply pipeline 33 and a fourth air supply pipeline 34. One end of the first air supply pipeline 31 is connected to the air supply channel of the first sealing member 223 through the first air supply channel 211, and the other end is connected to the airbag drive assembly 122 in the first airbag assembly 12.

[0053] One end of the second air supply pipe 32 is connected to the air guide 217 corresponding to the outside of the second groove 2212 through the second air supply channel 212, and the other end is connected to the first airbag assembly 12;

[0054] One end of the third air supply pipe 33 is connected to the air guide 217 corresponding to the outside of the first groove 2211 via the third air supply channel 213, and the other end is connected to the second airbag assembly 13.

[0055] One end of the fourth air supply pipe 34 is connected to the air supply channel of the second seal 224 through the fourth air supply channel 214, and the other end is connected to the airbag drive assembly 122 in the second airbag assembly 13.

[0056] The wind bag 121 has a groove 1211 at one end near the central rod 14. The port of the groove 1211 is inclined to the end face of the wind bag column. The end of the central rod 14 has a circumferential inclined surface, which cooperates with the groove 1211.

[0057] The working principle of the pneumatic airbag pump described in this embodiment is as follows:

[0058] When first used, since the ceramic rod 221 is installed vertically, it will always be at the bottom of the exhaust pipe 222 due to gravity. When the gas enters from the center of the split reversing valve 2, the gas is connected to the third gas supply pipe 33. The gas enters the second airbag assembly 13, and the second airbag assembly 13 moves to the right. At the same time, it drives the first piston rod 1221 inside the second airbag assembly 13 to move. During this process, the left bladder is stretched and the right bladder 112 is compressed, allowing liquid to enter from the liquid inlet channel, opening the regulating valve 1143 in the first channel, and entering the right bladder 112. The right bladder 112 absorbs the liquid.

[0059] When the first piston rod 1221 inside the second airbag assembly 13 moves to a certain position, compressed gas is released from the middle hole of the second airbag assembly 13 and supplied to the fourth air supply pipe 34. The gas will push the reversing valve rod 221 upward. When it is pushed to the top, the middle air inlet of the split reversing valve 2 supplies air to the second air supply pipe 32 through the second air supply channel 212, pushing the first airbag assembly 12 to the left. The left side of the first airbag assembly 12 compresses the right chamber, pushing the liquid in the right chamber to the outlet of the central pump body 11. The gas in the left chamber enters the split reversing valve 2 from the third air supply pipe 33 and is discharged from the outlet of the second exhaust hole 216. At the same time, after the first piston rod 1221 inside the first airbag assembly 12 moves to the left to a certain position, compressed gas is released from the middle hole of the first airbag assembly 12 and supplied to the first air supply pipe 31. The gas pushes the reversing valve rod 221 downward, thus completing a complete cycle.

[0060] During this process, the changes in the cyst cavity will adjust the position of the first and second channel liquid aspiration adjustment mechanisms, thereby turning the original liquid aspiration cavity into a liquid drainage cavity and the liquid drainage cavity into a liquid aspiration cavity.

[0061] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. A pneumatic airbag pump, characterized in that: include: The pump body (1) includes a central pump body (11), a first airbag assembly (12), a second airbag assembly (13), and a central rod (14). The first airbag assembly (12) and the second airbag assembly (13) are disposed opposite to each other at both ends of the central pump body (11), and the central rod (14) is disposed between the first airbag assembly (12) and the second airbag assembly (13). A sealing element (15) is provided at the connection between the central rod (14) and the central pump body (11). A separate reversing valve (2) is located on one side of the pump body (1) and is connected to both ends of the pump body (1) through an air supply pipeline assembly (3).

2. The pneumatic airbag pump according to claim 1, characterized in that: The split reversing valve (2) includes a reversing valve body (21) and a reversing assembly (22). The reversing valve body (21) has a cavity, and a first air supply channel (211), a second air supply channel (212), a third air supply channel (213), and a fourth air supply channel (214) are provided on both sides of the cavity. The reversing valve body (21) also has a first exhaust port (215) and a second exhaust port (216) on both sides. The reversing assembly (22) is located in the cavity.

3. The pneumatic airbag pump according to claim 2, characterized in that: The reversing assembly (22) includes a reversing valve stem (221) and an exhaust pipe (222). The exhaust pipe (222) has a first cavity. The reversing valve stem (221) is located in the first cavity of the exhaust pipe (222), and the length of the reversing valve stem (221) is less than the height of the first cavity. The exhaust pipe (222) is provided with a first seal (223) and a second seal (224) at both ends; the reversing valve stem (221) is provided with a first groove (2211) and a second groove (2212).

4. The pneumatic airbag pump according to claim 3, characterized in that: The exhaust pipe (222) has multiple sets of exhaust holes from bottom to top in the circumferential direction, and the reversing valve body (21) has a set of air guides (217) located outside the exhaust holes.

5. The pneumatic airbag pump according to claim 3, characterized in that: The first seal (223) and the second seal (224) are provided with air supply channels.

6. The pneumatic airbag pump according to claim 1, characterized in that: The central pump body (11) includes a central pump housing (111), with an inlet and an outlet on one side of the central pump housing (111), and an inlet channel (1101) and an outlet channel (1102) inside, which are respectively connected to the inlet and the outlet. It also includes a first channel and a second channel, which are arranged vertically and communicate with the inlet channel and the outlet channel; a bladder (112) is provided on both sides of the first channel and the second channel, and the first windbag assembly (12) and the second windbag assembly (13) are located in the corresponding bladder (112), and both ends are threadedly connected to the central pump housing (111) through end caps (113); a cavity is provided between the first windbag assembly (12), the second windbag assembly (13) and the corresponding bladder (112); Furthermore, both the first and second channels are equipped with a liquid suction adjustment mechanism (114).

7. The pneumatic airbag pump according to claim 6, characterized in that: The liquid suction regulating mechanism (114) includes a support tube (1141), a valve body (1142) is provided above the support tube (1141), and a regulating valve (1143) is provided in both the support tube (1141) and the valve body (1142). The lower inner wall of the support tube (1141) is tapered, and its opening diameter is smaller than that of the regulating valve (1143). The valve body (1142) includes an upper valve body (11421) and a lower valve body (11422). The (11421) is threadedly connected to the central pump body (11), and the lower valve body (11422) has a set of perforations in the lower circumferential direction. The lower valve body (11422) is connected to the corresponding bladder cavity (112) through a liquid guiding assembly (1144) on the outside of the perforations. The upper valve body (11421) has an adjustment cavity, and the adjustment valve (1143) is located in the adjustment cavity of the upper valve body (11421). The diameter of the lower valve body (11422) is smaller than the diameter of the adjustment valve (1143).

8. The pneumatic airbag pump according to claim 7, characterized in that: The first airbag assembly (12) and the second airbag assembly (13) both include an airbag (121) and an airbag drive assembly (122). The airbag (121) is located inside the airbag cavity (113), and the airbag drive assembly (122) is located inside the airbag (121). The airbag drive assembly (122) is provided with a first piston rod (1221). One end of the first piston rod (1221) passes through the airbag body of the airbag (121) and extends into the plunger of the airbag (121).

9. The pneumatic airbag pump according to claim 3, characterized in that: The air supply pipeline assembly (3) includes a first air supply pipeline (31), a second air supply pipeline (32), a third air supply pipeline (33) and a fourth air supply pipeline (34). One end of the first air supply pipeline (31) is connected to the air supply channel of the first sealing element (223) through a first air supply channel (211), and the other end is connected to the airbag drive assembly (122) inside the first airbag assembly (12). One end of the second air supply pipe (32) is connected to the air guide (217) corresponding to the outside of the second groove (2212) through the second air supply channel (212), and the other end is connected to the first air bag assembly (12); One end of the third air supply pipe (33) is connected to the air guide (217) corresponding to the outside of the first groove (2211) through the third air supply channel (213), and the other end is connected to the second airbag assembly (13); One end of the fourth air supply pipe (34) is connected to the air supply channel of the second seal (224) through the fourth air supply channel (214), and the other end is connected to the airbag drive assembly (122) in the second airbag assembly (13).

10. The pneumatic airbag pump according to claim 8, characterized in that: The wind bag (121) has a groove (1211) at one end near the central rod (14). The port of the groove (1211) is inclined to the end face of the wind bag column. The end of the central rod (14) has a circumferential inclined surface, which cooperates with the groove (1211).

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