CN118757375A - A pneumatic bellows pump - Google Patents

Abstract

The invention relates to the technical field of pump body equipment, in particular to a pneumatic air bag pump, which comprises an air bag pump and a pump head fixedly arranged in the air bag pump, wherein one side of the pump head is fixedly connected with a liquid outlet pipe, one side of the pump head perpendicular to the liquid outlet pipe is fixedly connected with a liquid inlet pipe, two ends of the pump head are fixedly connected with a first valve body, the inside of the first valve body is fixedly connected with a first valve body spring, the lower part of the first valve body is fixedly connected with a second valve body, the inside of the second valve body is fixedly connected with a second valve body spring, two sides of the pump head are fixedly connected with corrugated pipes, one end of each corrugated pipe, far away from the pump head, is fixedly connected with a pump body inserting shaft through a corrugated pipe fixing disc.

Description

A pneumatic bellows pump

Technical Field

The invention relates to a wind bag pump device, in particular to a pneumatic wind bag pump, belonging to the technical field of pump equipment.

Background Art

The bellows pump is a pump that uses compressed air to drive the bellows to expand and contract to achieve liquid delivery. It is mainly composed of bellows, cavity, inlet and outlet check valves, and components connected to the compressed air source. When working, compressed air enters the cavity to expand it. At this time, the pressure in the pump cavity decreases, and the liquid is sucked in through the inlet check valve; when the compressed air is discharged, the bellows shrinks, the pressure in the pump cavity increases, and the liquid is discharged through the outlet check valve under pressure. It is widely used in chemical, pharmaceutical, food processing and other industries.

The existing bellows pump has large pulsation, and the output flow and pressure have obvious fluctuations, which may affect the stability and accuracy of the system, and easily cause great impact and wear on the pipeline and related equipment. The telescopic action will cause the output flow and pressure to be obviously intermittent, and not continuous and stable enough.

Therefore, it is urgent to improve the wind bag pump device to solve the above-mentioned problems.

Summary of the invention

The object of the present invention is to provide a pneumatic bellows pump, which can control the flow direction of liquid through the internal first valve body spring and the second valve body spring, and the bellows on the left side of the pump head contracts when pushed by the gas, driving the right side outer connecting plate of the pump head and the right side bellows to stretch. Because it is a sealed structure, the liquid enters from the liquid outlet pipe and is sucked into the right side bellows, and the right side first valve body is pushed open by the liquid, and the right side second valve body is closed. The left side bellows contracts and drives the left side outer connecting plate at the same time. After contracting a certain distance, the left side bellows outer connecting plate approaches the sensor to sense the signal gas reversing signal, pushes the right side bellows to stretch it, and drives the left side bellows to stretch. At this time, the second valve body will be closed immediately due to the liquid pressure, and the first valve body will be pushed open and circulate continuously. The liquid passes through the first valve body to reach the liquid inlet pipe and flows out, thereby realizing the liquid transportation. At the same time, a pulsating waveform is generated through the interaction of the left and right first valve body springs and the second valve body springs on both sides of the pump head, and the mutual superposition suppresses the generation of pulsation, thereby realizing pulsation-free and smooth liquid transportation.

In order to achieve the above object, the main technical solutions adopted by the present invention include:

A pneumatic bellows pump comprises a bellows pump and a pump head fixedly installed inside the bellows pump, wherein a liquid outlet pipe is fixedly connected to one side of the pump head, and a liquid inlet pipe is fixedly connected to a side of the pump head perpendicular to the liquid outlet pipe, a first valve body is fixedly connected to both ends of the pump head, a first valve body spring is fixedly connected inside the first valve body, a second valve body is fixedly connected below the first valve body, a second valve body spring is fixedly connected inside the second valve body, bellows are fixedly connected to the outside of the first valve body and the second valve body on both sides of the pump head, and an end of the bellows away from the pump head is fixedly connected to a pump body plug shaft through a bellows fixing plate.

Preferably, both ends of the pump head are located outside the bellows and fixedly connected to a pump casing, one end of the pump casing away from the pump head is fixedly connected to a fixed seat, a quick exhaust valve is fixedly connected to the outside of the fixed seat, and the pump body plug shaft is slidably connected inside the fixed seat.

Preferably, the fixing seat is fixedly connected to one end of the fixing seat away from the bellows with an insert shaft fixing piece, and the insert shaft fixing piece is sleeved on the pump body insert shaft.

Preferably, a number of evenly distributed double-headed threaded connecting rods are connected between the fixing seats on both sides of the pump head, and round-headed hexagonal nuts are threadedly connected at both ends of the double-headed threaded connecting rods for fixing between the fixing seats.

Preferably, a fixing piece is sleeved on one end of the pump body plug shaft away from the double-headed threaded connecting rod, and a fixing nut is arranged on the outer side of the fixing piece and is threadedly connected to the pump body plug shaft.

Preferably, fixed seat connecting rods are provided on both sides of the pump body shaft and pass through the fixed seat. The fixed seat connecting rods are fixedly connected to the fixing member through connecting rod fixing bolts. The fixed seat is fixedly connected to the outer side of the fixing nut at one end away from the bellows with a protective cover.

Preferably, one end of the liquid outlet pipe away from the bellows pump is fixedly connected with a damper.

Preferably, the damper includes a damper lower cover and a bellows fixing seat fixedly mounted on the upper end of the damper lower cover, a water outlet hole connected to the liquid outlet pipe is opened on one side of the bellows fixing seat, and a water inlet hole is opened on the other side of the bellows fixing seat.

Preferably, the bellows fixing seat is located between the water outlet and the water inlet and is fixedly installed with a buffer baffle, the bellows fixing seat is fixedly connected with a damping bellows at one end away from the damper lower cover, the damping bellows is fixedly connected to the damper plug shaft through a connecting fixing plate, the damper plug shaft is slidably connected to the shaft sleeve base, and the shaft sleeve base is fixedly installed on the damper upper cover.

Preferably, the damper upper cover is fixedly connected to a damper housing located outside the sleeve base, the damper housing is fixedly connected to the bellows fixing seat at one end away from the damper upper cover, and a plurality of evenly distributed damper connecting rods are arranged outside the damper housing, and the damper connecting rods are fixedly connected to the damper upper cover and the damper lower cover.

The present invention has at least the following beneficial effects:

1. The liquid flow direction is controlled by the internal first valve body spring and the second valve body spring. The bellows on the left side of the pump head contracts when pushed by the gas, driving the outer connecting plate on the right side of the pump head and the right bellows to stretch. Because it is a sealed structure, the liquid enters from the liquid outlet pipe and is sucked into the right bellows. The first valve body on the right side is pushed open by the liquid, and the second valve body on the right side is closed. The left bellows contracts and drives the left outer connecting plate at the same time. After contracting a certain distance, the outer connecting plate of the left bellows approaches the sensor and senses the signal gas reversing signal, pushing the right bellows to stretch it, driving the left bellows to stretch. At this time, the second valve body will be immediately closed by the liquid pressure, and the first valve body will be pushed open and circulate continuously. The liquid flows out of the liquid inlet pipe through the first valve body to realize the liquid transportation. At the same time, the interaction of the first valve body springs and the second valve body springs on both sides of the pump head generates a pulsating waveform, which is superimposed on each other to suppress the generation of pulsation, thereby realizing pulsation-free and smooth liquid transportation.

2. The pump body plug shaft is slidably connected to the fixed seat, which can effectively prevent the bellows from shaking or displacement during operation, improve the stability and reliability of the system, help reduce the transmission of vibration generated by the bellows to the base and surrounding structures, and reduce the vibration impact on the entire system. The pump body plug shaft is fixedly installed on the fixing part through the fixed seat connecting rod. This connection method makes the installation of the bellows more convenient and accurate, and can quickly locate and deal with problems in subsequent maintenance and overhaul.

3. The through-type integral fixation of the double-threaded connecting rod and the fixed seat connecting rod provides all-round fastening force, so that the bellows pump is firmly fixed in all directions, greatly enhancing the overall stability. The through-type design makes it relatively easy to disassemble and install when the bellows pump needs to be maintained, repaired or replaced, saving time and labor costs.

4. When the bellows pump is in operation, the pressure in the liquid inlet pipe increases during the liquid discharge stroke. The liquid enters the damper and first passes through the water inlet hole through the inside of the bellows fixing seat. The liquid hits the buffer baffle and slows down its flow rate. Then the liquid reaches the inside of the inverted buffer baffle and also plays a buffering role. Finally, it is discharged through the water outlet hole. During operation, the bellows pump expands and contracts. The water pumping in gives this force. The damping bellows inside the damper will expand rapidly to buffer this force. At the same time, the air compression rebound damping bellows makes the internal liquid flow out at a uniform speed, making the flow output of the bellows pump more stable and predictable, thereby improving the precision and accuracy of flow control, while reducing the impact and wear on the internal components of the bellows pump, extending the service life of the bellows pump, and reducing the cost of maintenance and replacement.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

FIG1 is a connection diagram of the overall structure of the air bag pump provided by the present invention;

FIG2 is a schematic diagram of the structure of the air bag pump provided by the present invention;

FIG3 is a cross-sectional view of the overall structure of the bellows pump provided by the present invention;

FIG4 is a partial enlarged cross-sectional view of the structure of the air bag pump provided by the present invention;

FIG5 is a schematic diagram of the overall structure of the damping valve provided by the present invention;

FIG6 is a cross-sectional view of the overall structure of the damping valve provided by the present invention;

FIG7 is a cross-sectional view of the air bag pump and the damping valve provided by the present invention;

FIG. 8 is a partial parts diagram of the damping valve provided by the present invention.

In the figure, 1, bellows pump; 2, quick exhaust valve; 3, damper; 100, round head hexagonal nut; 101, pump head; 102, liquid inlet pipe; 103, protective cover; 104, fixed seat; 105, pump housing; 106, double-headed threaded connecting rod; 107, liquid outlet pipe; 108, fixed seat connecting rod; 109, fixing piece; 110, fixing nut; 111, pump body plug shaft; 112, plug shaft fixing piece; 113, connecting rod fixing bolt; 114, first valve body spring; 115 , second valve body spring; 116, bellows; 117, bellows fixing plate; 118, first valve body; 119, second valve body; 301, damper upper cover; 302, damper connecting rod; 303, damper housing; 304, bellows fixing seat; 305, damper lower cover; 306, damper plug shaft; 307, connecting fixing plate; 308, water outlet; 309, sleeve base; 310, water inlet; 311, damping bellows; 312, buffer baffle.

DETAILED DESCRIPTION

The following will describe the implementation methods of the present application in detail with the help of accompanying drawings and examples, so that the implementation process of how the present application uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

As shown in FIGS. 1 to 8 , a pneumatic bellows pump provided in this embodiment includes a bellows pump 1 and a pump head 101 fixedly installed inside the bellows pump 1, a liquid outlet pipe 107 is fixedly connected to one side of the pump head 101, a liquid inlet pipe 102 is fixedly connected to one side of the pump head 101 perpendicular to the liquid outlet pipe 107, a first valve body 118 is fixedly connected to both ends of the pump head 101, a first valve body spring 114 is fixedly connected inside the first valve body 118, and a second valve body 119 is fixedly connected below the first valve body 118. The second valve body 119 is fixedly connected with a second valve body spring 115 inside, and bellows 116 are fixedly connected to the outside of the first valve body 118 and the second valve body 119 on both sides of the pump head 101. The end of the bellows 116 away from the pump head 101 is fixedly connected to the pump body plug shaft 111 through a bellows fixing plate 117. The first valve body 118 and the second valve body 119 on one side of the pump head 101 control the flow direction of the liquid through the first valve body spring 114 and the second valve body spring 115 inside the pump head 101. When the left bellows 116 is pushed by the gas, it contracts, driving the right outer connecting plate of the pump head 101 and the right bellows 116 to stretch. Because it is a sealed structure, the liquid enters from the liquid outlet pipe 107 and is sucked into the right bellows 116, and the right first valve body 118 is pushed open by the liquid, and the right second valve body 119 is closed. The left bellows 116 contracts and drives the left outer connecting plate at the same time. After contracting a certain distance, the outer connecting plate of the left bellows 116 approaches the sensor and senses the signal gas reversing signal, pushing the right bellows 116 to stretch it, driving the left bellows 116 to stretch. At this time, the second valve body 119 will be immediately closed by the liquid pressure, and the first valve body 118 will be pushed open and circulate continuously. The liquid passes through the first valve body 118 to reach the liquid inlet pipe 102 and flow out, realizing the liquid transportation. At the same time, the interaction between the left and right first valve body springs 114 and the second valve body springs 115 on both sides of the pump head 101 generates a pulsating waveform, which is superimposed on each other to suppress the generation of pulsation, thereby realizing pulsation-free and smooth liquid transportation.

Further, as shown in Figures 2 and 3; both ends of the pump head 101 are located outside the bellows 116 and are fixedly connected to a pump casing 105, one end of the pump casing 105 away from the pump head 101 is fixedly connected to a fixing seat 104, the outside of the fixing seat 104 is fixedly connected to a quick exhaust valve 2, and the inside of the fixing seat 104 is slidably connected to a pump body plug shaft 111; the fixed seat 104 is fixedly connected to an plug shaft fixing piece 112 at one end away from the bellows 116, and the plug shaft fixing piece 112 is sleeved on the pump body plug shaft 111; a number of evenly distributed double-headed threaded connecting rods 106 are connected between the fixing seats 104 on both sides of the pump head 101, and the double-headed threaded connecting rods 106 are threadedly connected at both ends A round-head hexagonal nut 100 is connected to the fixing seat 104; the pump body plug shaft 111 is slidably connected to the fixing seat 104, which can effectively prevent the bellows 116 from shaking or displacing during operation, improve the stability and reliability of the system, and help reduce the transmission of vibrations generated by the bellows 116 to the base and surrounding structures, reducing the vibration impact on the entire system. The pump body plug shaft 111 is fixedly installed on the fixing piece 109 through the fixing seat connecting rod 108. This connection method makes the installation of the bellows 116 more convenient and accurate, and at the same time, in subsequent maintenance and inspection, problems can be quickly located and handled.

Furthermore, as shown in Figures 2 and 4, a fixing piece 109 is sleeved on the end of the pump body shaft 111 away from the double-headed threaded connecting rod 106, and a fixing nut 110 is arranged on the outside of the fixing piece 109 and is threadedly connected to the pump body shaft 111; a fixing seat connecting rod 108 is arranged on both sides of the pump body shaft 111 through the fixing seat 104, and the fixing seat connecting rod 108 is fixedly connected to the fixing piece 109 through a connecting rod fixing bolt 113, and the fixing seat 104 is away from the bellows 116. One end is fixedly connected to the outside of the fixing nut 110 with a protective cover 103; the double-headed threaded connecting rod 106 and the fixing seat connecting rod 108 are fixedly fixed in an integral manner, providing all-round tightening force, so that the air bag pump 1 is firmly fixed in all directions, greatly enhancing the overall stability, and the through-design makes it relatively simple to disassemble and install when the air bag pump 1 needs to be maintained, repaired or replaced, saving time and labor costs.

Furthermore, as shown in FIGS. 5 to 8, the end of the liquid outlet pipe 107 away from the air bag pump 1 is fixedly connected to the damper 3; the damper 3 includes a damper lower cover 305 and a bellows fixing seat 304 fixedly installed on the upper end of the damper lower cover 305, a water outlet hole 308 connected to the liquid outlet pipe 107 is opened on one side of the bellows fixing seat 304, and a water inlet hole 310 is opened on the other side of the bellows fixing seat 304; the bellows fixing seat 304 is fixedly installed with a buffer baffle 312 between the water outlet hole 308 and the water inlet hole 310, The bellows fixing seat 304 is fixedly connected with a damping bellows 311 at one end away from the damper lower cover 305, and the damping bellows 311 is fixedly connected with the damper plug shaft 306 through the connecting fixing plate 307. The damper plug shaft 306 is slidably connected to the sleeve base 309, and the sleeve base 309 is fixedly installed on the damper upper cover 301; the damper upper cover 301 is fixedly connected with a damper housing 303 on the outer side of the sleeve base 309, and the damper housing 303 is fixedly connected to the bellows fixing seat at one end away from the damper upper cover 301 304, a plurality of evenly distributed damper connecting rods 302 are arranged on the outside of the damper housing 303, and the damper connecting rods 302 are fixedly connected to the damper upper cover 301 and the damper lower cover 305; when the bellows pump 1 is in operation, during the liquid discharge stroke, the pressure in the liquid inlet pipe 102 increases, and the liquid enters the damper 3 first through the water inlet hole 310 and passes through the inside of the bellows fixing seat 304, and the liquid enters and hits the buffer baffle 312 to slow down its flow rate, and then the liquid reaches the inside of the inverted buffer baffle 312 and also acts as a buffer The water is finally discharged through the water outlet 308. During operation, the bellows pump 1 expands and contracts, and the water pumped in gives this force. The damping bellows 311 inside the damper 3 will expand rapidly to buffer this force. At the same time, the damping bellows 311 relies on the compression and rebound of the air to make the internal liquid flow out at a uniform speed, making the flow output of the bellows pump 1 more stable and predictable, thereby improving the precision and accuracy of flow control, while reducing the impact and wear on the internal components of the bellows pump 1, extending the service life of the bellows pump 1, and reducing the cost of maintenance and replacement.

As shown in Figures 1 to 8, the principle of a pneumatic bellows pump provided in this embodiment is as follows: the exhaust speed in the bellows pump 1 is increased by the quick exhaust valve 2, thereby increasing the running speed of the bellows pump 1; the first valve body 118 and the second valve body 119 on one side of the pump head 101 control the flow direction of the liquid through the first valve body spring 114 and the second valve body spring 115 inside thereof; the bellows 116 on the left side of the pump head 101 contracts when pushed by the gas, driving the right side outer connecting plate of the pump head 101 and the right side bellows 116 to stretch; because it is a sealing structure, the liquid enters from the liquid outlet pipe 107 and is sucked into the right side bellows 116; the first valve body 118 on the right side is pushed open by the liquid, the second valve body 119 on the right side is closed, and the left side The bellows 116 contracts and drives the left outer connecting plate at the same time. After contracting a certain distance, the outer connecting plate of the left bellows 116 approaches the sensor and senses the signal gas reversing signal, pushing the right bellows 116 to stretch, driving the left bellows 116 to stretch. At this time, the second valve body 119 will be immediately closed by the liquid pressure, and the first valve body 118 will be pushed open and circulate continuously. The liquid flows out of the liquid inlet pipe 102 through the first valve body 118 to realize the liquid transportation. At the same time, the interaction between the first valve body spring 114 and the second valve body spring 115 on both sides of the pump head 101 generates a pulsating waveform, which is superimposed on each other to suppress the generation of pulsation, thereby realizing pulsation-free and stable liquid transportation. 11 is slidably connected to the fixing seat 104, which can effectively prevent the bellows 116 from shaking or displacing during operation, improve the stability and reliability of the system, and help reduce the transmission of the vibration generated by the bellows 116 to the base and surrounding structures, reducing the vibration impact on the entire system. The pump body plug shaft 111 is fixedly installed on the fixing member 109 through the fixing seat connecting rod 108. This connection method makes the installation of the bellows 116 more convenient and accurate. At the same time, in subsequent maintenance and overhaul, problems can be quickly located and handled. When the bellows pump 1 is in operation, when the liquid is discharged, the pressure in the liquid inlet pipe 102 increases, and the liquid enters the damper 3 first through the water inlet hole 310 through the bellows fixing Inside the fixed seat 304, the liquid goes in and hits the buffer baffle 312, slowing down its flow rate. Then the liquid reaches the inside of the inverted buffer baffle 312 and also plays a buffering role. Finally, it is discharged through the water outlet 308. During operation, the bellows 311 of the damper 3 will expand and contract, and the water entering will give this force. The damping bellows 311 inside the damper 3 will expand rapidly to buffer this force. At the same time, the damping bellows 311 relies on the compression and rebound of the air to make the internal liquid flow out at a uniform speed, making the flow output of the bellows 1 more stable and predictable, thereby improving the precision and accuracy of flow control, while reducing the impact and wear on the internal components of the bellows 311, extending the service life of the bellows 311, and reducing the cost of maintenance and replacement.

For example, certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that hardware manufacturers may use different terms to refer to the same component. This specification and claims do not use differences in names as a way to distinguish components, but use differences in the functions of components as the criteria for distinction. For example, "including" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". "Approximately" means that within an acceptable error range, those skilled in the art can solve technical problems within a certain error range and basically achieve technical effects.

It should be noted that the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a product or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such product or system. In the absence of more restrictions, the elements defined by the sentence "comprises a ..." do not exclude the existence of other identical elements in the product or system including the elements.

The above description shows and describes several preferred embodiments of the present invention, but as mentioned above, it should be understood that the present invention is not limited to the form disclosed herein, and should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be modified within the scope of the invention concept described herein through the above teachings or the technology or knowledge of the relevant field. And the changes and modifications made by those skilled in the art do not depart from the spirit and scope of the present invention, and should be within the scope of protection of the claims attached to the present invention.

Claims (10)

1. A pneumatic bellows pump, comprising a bellows pump (1) and a pump head (101) fixedly mounted inside the bellows pump (1), characterized in that: a liquid outlet pipe (107) is fixedly connected to one side of the pump head (101), a liquid inlet pipe (102) is fixedly connected to one side of the pump head (101) perpendicular to the liquid outlet pipe (107), a first valve body (118) is fixedly connected to both ends of the pump head (101), a first valve body spring (118) is fixedly connected inside the first valve body (118), and a first valve body spring (112) is fixedly connected to the first valve body (118). 14), a second valve body (119) is fixedly connected below the first valve body (118), a second valve body spring (115) is fixedly connected inside the second valve body (119), and bellows (116) are fixedly connected on both sides of the pump head (101) on the outside of the first valve body (118) and the second valve body (119), and one end of the bellows (116) away from the pump head (101) is fixedly connected to a pump body plug shaft (111) via a bellows fixing plate (117). 2. A pneumatic bellows pump according to claim 1, characterized in that: both ends of the pump head (101) are located outside the bellows (116) and are fixedly connected to a pump casing (105), one end of the pump casing (105) away from the pump head (101) is fixedly connected to a fixed seat (104), a quick exhaust valve (2) is fixedly connected to the outside of the fixed seat (104), and the pump body plug shaft (111) is slidably connected inside the fixed seat (104). 3. A pneumatic bellows pump according to claim 2, characterized in that: the end of the fixing seat (104) away from the bellows (116) is fixedly connected with a shaft fixing piece (112), and the shaft fixing piece (112) is sleeved on the pump body shaft (111). 4. A pneumatic bellows pump according to claim 2, characterized in that: a number of evenly distributed double-headed threaded connecting rods (106) are connected between the fixed seats (104) on both sides of the pump head (101), and round-headed hexagonal nuts (100) are threadedly connected at both ends of the double-headed threaded connecting rods (106) for fixing between the fixed seats (104). 5. A pneumatic bellows pump according to claim 4, characterized in that: a fixing piece (109) is sleeved on one end of the pump body shaft (111) away from the double-headed threaded connecting rod (106), and a fixing nut (110) is arranged on the outside of the fixing piece (109) and is threadedly connected to the pump body shaft (111). 6. A pneumatic bellows pump according to claim 5, characterized in that: fixed seat connecting rods (108) are provided on both sides of the pump body shaft (111) passing through the fixed seat (104), and the fixed seat connecting rods (108) are fixedly connected to the fixing piece (109) through connecting rod fixing bolts (113); and the fixed seat (104) is fixedly connected to the outer side of the fixing nut (110) at one end away from the bellows (116). A protective cover (103) is provided. 7. A pneumatic bellows pump according to claim 1, characterized in that a damper (3) is fixedly connected to one end of the liquid outlet pipe (107) away from the bellows pump (1). 8. A pneumatic bellows pump according to claim 7, characterized in that: the damper (3) includes a damper lower cover (305) and a bellows fixing seat (304) fixedly mounted on the upper end of the damper lower cover (305), one side of the bellows fixing seat (304) is provided with a water outlet hole (308) connected to the liquid outlet pipe (107), and the other side of the bellows fixing seat (304) is provided with a water inlet hole (310). 9. A pneumatic bellows pump according to claim 8, characterized in that: the bellows fixing seat (304) is fixedly installed with a buffer baffle (312) between the water outlet (308) and the water inlet (310), and the bellows fixing seat (304) is fixedly connected with a damping bellows (311) at one end away from the damper lower cover (305), and the damping bellows (311) is fixedly connected with the damper plug shaft (306) through a connecting fixing plate (307), and the damper plug shaft (306) is slidably connected to the shaft sleeve base (309), and the shaft sleeve base (309) is fixedly installed on the damper upper cover (301). 10. A pneumatic bellows pump according to claim 9, characterized in that: a damper shell (303) is fixedly connected to the damper upper cover (301) on the outside of the sleeve base (309), and one end of the damper shell (303) away from the damper upper cover (301) is fixedly connected to the bellows fixing seat (304), and a plurality of evenly distributed damper connecting rods (302) are arranged on the outside of the damper shell (303), and the damper connecting rods (302) are fixedly connected to the damper upper cover (301) and the damper lower cover (305).