Large-flow air bag pump

Abstract

The invention discloses a high-flow air bag pump, which belongs to the technical field of fluid pumps, and comprises a pneumatic mechanism and a fluid mechanism, the pneumatic mechanism comprises the following structures: a pneumatic shell, the interior of the pneumatic shell is hollow and is divided into two pneumatic cavities by the fluid mechanism, and pneumatic air bags are arranged in the pneumatic cavities; one side of the pneumatic cavity is provided with an air source interface and a liquid leakage alarm sensor which extend out of the pneumatic shell; a suction channel and a discharge channel which extend into the pneumatic air bags are arranged in the fluid mechanism, a suction connector is arranged on one side of the suction channel, suction inlets communicated with the interiors of the two pneumatic air bags are formed in the two ends of the suction channel respectively, and suction valves are arranged in the suction inlets. One side of the discharging channel is provided with a discharging connector, the two ends of the discharging channel are provided with discharging ports communicated with the interiors of the two pneumatic air bags respectively, and discharging valves are arranged in the discharging ports; according to the invention, fluid can be stably conveyed in a high-flow manner.

Description

Technical Field

[0001] The invention relates to the technical field of fluid pumps, and in particular to a large-flow bellows pump. Background Art

[0002] A bellows pump is a type of pump used to transport special corrosive fluids such as strong acids and strong alkalis. It is particularly widely used in the semiconductor industry and the electronics industry. In the field of industrial fluid transportation, a bellows pump is usually required to transport the fluid in a large flow rate, continuously and stably. The bellows pump is required to have a higher delivery flow rate per unit time. In the process of large-flow fluid transportation, the flow rate of the fluid inside the bellows pump is faster and will generate greater impact force, which can easily accelerate the wear of the internal structure of the bellows pump. Therefore, a buffer or flow stabilization structure is usually set inside a large-flow bellows pump to avoid excessive fluid impact force that accelerates the wear of the internal structure of the bellows pump.

[0003] Based on the above situation, a Chinese patent with announcement number CN118757375A discloses a pneumatic bellows pump, including a bellows pump and a pump head fixedly installed inside the bellows pump, a liquid outlet pipe fixedly connected to one side of the pump head, a liquid inlet pipe fixedly connected to a side of the pump head perpendicular to the liquid outlet pipe, a first valve body fixedly connected to both ends of the pump head, a first valve body spring fixedly connected to the inside of the first valve body, a second valve body fixedly connected below the first valve body, a second valve body spring fixedly connected to the inside of the second valve body, bellows fixedly connected to the outside of the first valve body and the second valve body on both sides of the pump head, and a pump body plug shaft fixedly connected to the end of the bellows away from the pump head through a bellows fixing plate.

[0004] The bellows pump in the above patent generates a pulsating waveform through the interaction between the first valve body spring and the second valve body spring on both sides of the pump head, and cooperates with the buffer baffle to suppress the generation of pulsation during the flow of fluid and reduce the impact of the fluid on the internal structure of the bellows pump. However, the buffer baffle is arranged between the water inlet and the water outlet. After the fluid enters the bellows pump, it will directly hit the buffer baffle, which may easily cause the fluid to lose too much kinetic energy. The bellows needs to generate a greater pressure to enable the fluid to carry more kinetic energy out of the bellows pump to achieve fluid pumping, which may easily increase the energy consumption of the bellows pump and affect the flow rate of fluid delivery. Therefore, the above bellows pump still has room for improvement. Summary of the invention

[0005] In view of the technical defects existing in the background technology, the present invention proposes a large flow air bag pump, which solves the above technical problems and meets the actual needs. The specific technical solution is as follows: A large-flow air bag pump, comprising a pneumatic mechanism and a fluid mechanism, wherein the pneumatic mechanism comprises the following structures: a pneumatic shell, wherein the interior of the pneumatic shell is hollow and is divided into two pneumatic chambers by the fluid mechanism, wherein each of the pneumatic chambers is provided with a pneumatic air bag, wherein a fluid chamber is formed between the interior of the pneumatic air bag and the fluid mechanism, and an air source interface and a liquid leakage alarm sensor extending outside the pneumatic shell are provided on one side of the pneumatic chamber; The fluid mechanism is provided with an intake channel and an exhaust channel both extending to the inside of the pneumatic air bag, one side of the intake channel is provided with an intake interface extending to the outside of the fluid mechanism, two opposite ends of the intake channel are provided with intake ports respectively connected to the inside of two pneumatic air bags, and an intake valve is provided in the intake port; one side of the exhaust channel is provided with an exhaust interface extending to the outside of the fluid mechanism, two opposite ends of the exhaust channel are provided with exhaust ports respectively connected to the inside of two pneumatic air bags, and an exhaust valve is provided in the exhaust port.

[0006] As a further technical solution of the present invention, the inner diameter of the suction channel gradually increases near the suction port and is fixedly connected to one end of the suction valve, and the other end of the suction valve extends to the interior of the pneumatic air bag; the inner diameter of the discharge channel gradually increases near the discharge port and is fixedly connected to one end of the discharge valve, and the other end of the discharge valve extends to the interior of the pneumatic air bag.

[0007] As a further technical solution of the present invention, a buffer layer is provided on the side of the pneumatic air bag away from the fluid mechanism. The buffer layer is hollow inside and an elastic buffer plate is provided on the side close to the pneumatic air bag. One side of the elastic buffer plate is located inside the fluid cavity.

[0008] As a further technical solution of the present invention, a telescopic support plate is provided on the side of the buffer layer away from the pneumatic air bag, and a telescopic shaft extending to the outside of the pneumatic shell is provided on the side of the telescopic support plate away from the pneumatic air bag, and a sealing sleeve is provided on the surface of the telescopic shaft.

[0009] As a further technical solution of the present invention, the suction valve includes a first valve body and a first shell with a hollow interior. The first valve body is arranged inside the first shell. The first shell is provided with a first through hole running through both ends along the axis. The first valve body is provided with a first elastic member at one end away from the suction port, and the other end is provided with a first sealing end head with a tapered end that matches one end of the first through hole.

[0010] As a further technical solution of the present invention, the discharge valve includes a second valve body and a second outer shell with a hollow interior. The second valve body is arranged inside the second outer shell. The second outer shell is provided with second through holes extending through both ends along the axis. The second valve body is provided with a second elastic member whose end abuts against the inner wall of the second outer shell at one end close to the discharge port, and a second sealing end head with a tapered end matching one end of the second through hole.

[0011] As a further technical solution of the present invention, a fixed frame is sleeved on the outside of the pneumatic mechanism, and the fixed frame includes a fixed plate and a fixed rod. There are two fixed plates and they are respectively fixedly connected to the two ends of the pneumatic shell. There are several fixed rods and they are arranged between the two fixed plates.

[0012] As a further technical solution of the present invention, a circle of fluid sealing grooves are provided on both sides of the fluid mechanism, and a circle of fluid sealing rings are provided on the edge of one end of the pneumatic air bag close to the fluid mechanism, and the fluid sealing rings are embedded in the fluid sealing grooves.

[0013] As a further technical solution of the present invention, a circle of gas sealing ring is provided on the inner wall of one end of the pneumatic housing close to the fluid mechanism, and the surface of the gas sealing ring abuts against the surface of the fluid mechanism.

[0014] The beneficial effects of the present invention are: The present invention enables compressed air to alternately enter two pneumatic chambers to alternately expand and contract the two pneumatic air bags. During the expansion and contraction process of the pneumatic air bags, negative pressure and positive pressure are alternately formed inside, thereby sucking the fluid from the suction channel and then discharging it from the discharge channel. At the same time, the pneumatic air bags are stably expanded and contracted through the telescopic shaft, so that a large flow rate and stable fluid transportation can be performed. The fluid is buffered by the buffer layer when entering and leaving the fluid cavity, which buffers the impact force on the inner wall of the pneumatic air bag when the amount of fluid inside the fluid cavity changes, and the kinetic energy loss of the fluid is small, thereby ensuring a large flow rate of fluid transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of a large-flow air bag pump.

[0016] Figure 2 A schematic diagram of the internal structure of a large flow air bag pump Figure 1 .

[0017] Figure 3 A schematic diagram of the internal structure of a large flow air bag pump Figure 2 .

[0018] Figure 4 A schematic diagram of the internal structure of a large flow air bag pump Figure 3 .

[0019] Figure 5 yes Figure 4 Partial schematic diagram at point A in the middle.

[0020] Figure 6 The present invention is a schematic diagram of the structure of the fluid mechanism of a large-flow bellows pump.

[0021] Figure 7 The present invention is a cross-sectional view of the fluid mechanism of a large-flow bellows pump.

[0022] Figure 8 The present invention is a cross-sectional view of a pneumatic bellows of a large-flow bellows pump.

[0023] Wherein: 1-pneumatic mechanism, 11-pneumatic shell, 12-pneumatic air bag, 13-air source interface, 14-leakage alarm sensor, 15-buffer layer, 151-elastic buffer plate, 16-telescopic support plate, 161-telescopic shaft, 17-sealing sleeve, 18-fluid sealing ring, 19-gas sealing ring, 2-fluid mechanism, 21-intake channel, 22-discharge channel, 23-intake valve, 231-first shell, 232-first through hole, 233-first elastic member, 234-first sealing end, 24-discharge valve, 241-second shell, 242-second through hole, 243-second elastic member, 244-second sealing end, 25-fluid sealing groove, 3-intake interface, 4-discharge interface, 5-fixed frame, 51-fixed plate, 52-fixed rod. DETAILED DESCRIPTION

[0024] The implementation modes of the present invention are described below in conjunction with relevant drawings and embodiments. The implementation modes of the present invention are not limited to the following embodiments, and the present invention relates to relevant necessary components in the technical field, which should be regarded as the known technology in the technical field and can be known and mastered by the technical personnel in the technical field.

[0025] like Figure 1 , Figure 2 , Figure 3 As shown, a large flow air bag pump includes a pneumatic mechanism 1 and a fluid mechanism 2. The pneumatic mechanism 1 includes the following structures: a pneumatic housing 11. The interior of the pneumatic housing 11 is hollow and is divided into two pneumatic cavities by the fluid mechanism 2. A pneumatic air bag 12 is provided in each pneumatic cavity. A fluid cavity is formed between the interior of the pneumatic air bag 12 and the fluid mechanism 2. An air source interface 13 extending to the outside of the pneumatic housing 11 and a liquid leakage alarm sensor 14 are provided on one side of the pneumatic cavity. The fluid mechanism 2 is provided with an intake channel 21 and an exhaust channel 22 both extending to the inside of the pneumatic air bag 12; one side of the intake channel 21 is provided with an intake interface 3 extending to the outside of the fluid mechanism 2; opposite ends of the intake channel 21 are provided with intake ports respectively connected to the inside of the two pneumatic air bags 12; an intake valve 23 is provided in the intake port; one side of the exhaust channel 22 is provided with an exhaust interface 4 extending to the outside of the fluid mechanism 2; opposite ends of the exhaust channel 22 are provided with exhaust ports respectively connected to the inside of the two pneumatic air bags 12; an exhaust valve 24 is provided in the exhaust port.

[0026] The present invention is mainly used for conveying fluid, wherein the suction interface 3 is used to connect with the pipeline for fluid inflow, and the pipeline extends to the container for storing the fluid to be conveyed, and the discharge interface 4 is used to connect with the pipeline for fluid discharge, and the pipeline extends to other containers or equipment. When the air bag pump is working, the fluid conveying, subpackaging and other operations are realized by conveying the fluid; the air source interface 13 can be installed with a three-way valve, which is connected to the equipment that generates compressed air through the three-way valve and guides the compressed air to the inside of the pneumatic cavity, and the other interface of the three-way valve is used to discharge the compressed air inside the pneumatic cavity, and the compressed air enters the inside of the pneumatic cavity through the three-way valve, and a positive pressure is formed inside the pneumatic cavity and causes the pneumatic air bag 12 to face the fluid mechanism 2 compression, when the pneumatic bellows 12 is restored by its own elasticity, the compressed air in the pneumatic cavity is discharged through the three-way valve, and such a cycle enables the pneumatic bellows 12 to achieve reciprocating telescopic motion. During the reciprocating telescopic motion of the pneumatic bellows 12, positive pressure and negative pressure will be formed in the fluid cavity, and the fluid will be drawn into the fluid cavity by the negative pressure, and then the fluid will be discharged by the positive pressure, so that the bellows pump can transport the fluid; in addition, the leakage alarm sensor 14 detects whether there is liquid in the pneumatic cavity through the change of capacitance or resistance, and triggers an alarm when liquid is detected, so as to judge whether the liquid in the fluid cavity has leaked into the pneumatic cavity, so as to ensure the normal operation of the pneumatic mechanism 1.

[0027] The working principle of the air bag pump of the present invention is as follows: when the pneumatic air bag 12 is reset and stretched, a negative pressure is formed inside, and the suction valve 23 at the suction port is opened so that the fluid is sucked into the pneumatic air bag 12 along the suction channel 21. When the pneumatic air bag 12 completes the reset and stretching stroke, compressed air enters the pneumatic cavity to push the pneumatic air bag 12 to compress so that a positive pressure is formed inside the fluid cavity. At the same time, the suction valve 23 is closed and the discharge valve 24 at the discharge port is opened. The fluid inside the pneumatic air bag 12 is discharged out of the air bag pump through the discharge channel 22, and the fluid is transported to other containers or equipment through a pipeline connected to the discharge interface 4. The pneumatic air bag 12 cyclically expands and contracts in this way to extract and discharge the fluid, thereby realizing uninterrupted transportation of the fluid; the pneumatic housing 11 is divided into two pneumatic cavities, and the air compressor can alternately form positive pressure inside the two pneumatic cavities through the reversing valve. The two pneumatic air bags 12 in the two pneumatic cavities alternately extract and discharge the fluid, thereby realizing uninterrupted transportation of the fluid, which is beneficial to improving the transportation efficiency and transportation flow rate of the fluid.

[0028] Furthermore, the corrugated structure on the surface of the air bag of the currently common air bag pumps usually has only six layers, while the corrugated structure on the surface of the pneumatic air bag 12 of the present invention has eight layers. The pneumatic air bag 12 has a larger stroke for each telescopic movement, which makes the volume change of the fluid cavity larger. Since the pneumatic air bag 12 forms negative pressure and positive pressure through telescopic movement to realize the extraction and discharge of the fluid, the pneumatic air bag 12 can transport more fluid each time it telescopic movement, so that the air bag pump of the present invention can achieve large flow delivery.

[0029] After adopting the above structure, it needs to be further explained that, if Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, the inner diameter of the suction channel 21 at one end near the suction port gradually increases and is fixedly connected to one end of the suction valve 23, and the other end of the suction valve 23 extends to the inside of the pneumatic air bag 12; the inner diameter of the suction channel 21 near the suction port is larger, which makes the suction valve 23 easier to install, and the inner diameter of the channel in the suction valve 23 that allows the fluid to pass can match the inner diameter of the suction channel 21, which is conducive to the fluid entering the suction valve 23 more smoothly, and the suction valve 23 extends the length of the internal valve core by extending to the inside of the pneumatic air bag 12, so that the valve core can move a larger stroke to increase the opening inside the suction valve 23, which is conducive to increasing the flow rate of the fluid.

[0030] It needs to be further explained that the inner diameter of the discharge channel 22 gradually increases near the discharge port and is fixedly connected to one end of the discharge valve 24, and the other end of the discharge valve 24 extends to the inside of the pneumatic air bag 12; the discharge channel 22 has a larger inner diameter near the discharge port, which makes the discharge valve 24 easier to install, and the inner diameter of the channel in the discharge valve 24 that allows fluid to pass can match the inner diameter of the discharge channel 22, which is conducive to the fluid entering the discharge valve 24 more smoothly, and the discharge valve 24 extends the length of the internal valve core by extending to the inside of the pneumatic air bag 12, so that the valve core can move a larger stroke to increase the opening inside the discharge valve 24, which is conducive to increasing the flow rate of the fluid.

[0031] As one of the preferred embodiments of the present invention, Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, the suction valve 23 includes a first valve body and a first shell 231 with a hollow interior. The first valve body is arranged inside the first shell 231. The first shell 231 is provided with a first through hole 232 that runs through both ends along the axis. The first valve body is provided with a first elastic member 233 whose end abuts against the inner wall of the first shell 231 at one end away from the suction port, and a first sealing end head 234 with a tapered end that matches one end of the first through hole 232.

[0032] In the suction valve 23 of the present invention, the first shell 231 is used to fix the suction valve 23 at a position of the suction channel 21 close to the suction port, the first through hole 232 serves as a channel for the fluid in the suction channel 21 to enter the fluid cavity, the first elastic member 233 is preferably a compression spring, and the first sealing end 234 is preferably made of sealing rubber. In the reset state, the first sealing end 234 blocks the first through hole 232 close to the suction channel 21 under the elastic force of the first elastic member 233, and the fluid in the suction channel 21 cannot enter the first through hole 232. When the pneumatic air bag 12 stretches to form a negative pressure in the fluid cavity The pressure difference at both ends of the first sealing end head 234 causes the fluid to push the first sealing end head 234 and compress the first elastic member 233, so that the fluid can enter the first through hole 232 and enter the fluid cavity from the other end of the first through hole 232, thereby suctioning the fluid into the fluid cavity, and the first sealing end head 234 with a tapered end can reduce the resistance to the fluid, making it easier for the fluid to pass through. When the pneumatic air bag 12 is compressed to form a positive pressure in the fluid cavity, the first sealing end head 234 is reset under the elastic force of the first elastic member 233 and blocks one end of the first through hole 232, thereby preventing the fluid from flowing back into the suction channel 21.

[0033] As one of the preferred embodiments of the present invention, Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, the discharge valve 24 includes a second valve body and a second shell 241 with a hollow interior. The second valve body is arranged inside the second shell 241. The second shell 241 is provided with a second through hole 242 that runs through both ends along the axis. The second valve body is provided with a second elastic member 243 whose end abuts against the inner wall of the second shell 241 at one end near the discharge port, and a second sealing end head 244 with a tapered end that matches one end of the second through hole 242 at the other end.

[0034] In the discharge valve 24 of the present invention, the second housing 241 is used to fix the discharge valve 24 at a position close to the discharge port of the discharge channel 22, the second through hole 242 serves as a channel for the fluid in the fluid cavity to enter the discharge channel 22, the second elastic member 243 is preferably a compression spring, and the second sealing end 244 is preferably made of sealing rubber. In the reset state, the second sealing end 244 blocks the second through hole 242 close to one end of the fluid cavity under the elastic force of the second elastic member 243, and the fluid in the fluid cavity cannot enter the second through hole 242. When the pneumatic air bag 12 is compressed to form a positive pressure in the fluid cavity, the second The pressure difference at both ends of the sealing end head 244 causes the fluid to push the second sealing end head 244 and compress the second elastic member 243, so that the fluid can enter the second through hole 242 and enter the discharge channel 22 from the other end of the second through hole 242. The second sealing end head 244 with a tapered end can reduce the resistance to the fluid, making it easier for the fluid to pass through and discharge the fluid from the fluid cavity. When the pneumatic air bag 12 is stretched to form a negative pressure in the fluid cavity, the second sealing end head 244 is reset under the elastic force of the second elastic member 243 and blocks one end of the second through hole 242 to prevent the fluid from flowing back from the discharge channel 22.

[0035] Furthermore, the first through hole 232 of the present invention matches the size of the suction channel 21 and has a larger aperture. At the same time, the second through hole 242 matches the size of the discharge channel 22 and has a larger aperture, so that a large flow rate is guaranteed during the flow of the fluid between the valve and the channel, and the resistance encountered by the fluid during the flow between the valve and the channel is low, which can ensure the stability of the fluid flow process.

[0036] As one of the preferred embodiments of the present invention, Figure 3 , Figure 8As shown, a buffer layer 15 is provided on the side of the pneumatic air bag 12 away from the fluid mechanism 2. The buffer layer 15 is hollow inside and an elastic buffer plate 151 is provided on the side close to the pneumatic air bag 12. One side of the elastic buffer plate 151 is located inside the fluid cavity; the elastic buffer plate 151 serves as the inner wall of the fluid cavity away from the fluid mechanism 2 and can be in direct contact with the fluid. The elastic buffer plate 151 is made of a material with good elasticity and corrosion resistance. When negative pressure is generated inside the pneumatic air bag 12 during the resetting and stretching process, the elastic buffer plate 151 can protrude into the fluid cavity to buffer the change in its internal pressure, so that the fluid The change of pressure inside the body cavity is softer, and the raised elastic buffer plate 151 can better disperse the impact force generated by the fluid flow, thereby improving the impact resistance of the pneumatic air bag 12; in addition, the pneumatic air bag 12 generates positive pressure inside during the compression process. Since the buffer layer 15 is hollow inside, the elastic buffer plate 151 can be recessed into the buffer layer 15 and buffer the pressure change in the fluid cavity, making the change of pressure inside the fluid cavity softer, and can avoid the pressure generated during the fluid flow from being concentrated on the inner wall of the pneumatic air bag 12, which is beneficial to improving the durability of the pneumatic air bag 12.

[0037] As one of the preferred embodiments of the present invention, Figure 4 , Figure 8 As shown, a telescopic support plate 16 is provided on the side of the buffer layer 15 away from the pneumatic air bag 12, and a telescopic shaft rod 161 extending to the outside of the pneumatic shell 11 is provided on the side of the telescopic support plate 16 away from the pneumatic air bag 12, and a sealing shaft sleeve 17 is sleeved on the surface of the telescopic shaft rod 161; the telescopic support plate 16 is used to withstand the positive pressure of the pneumatic cavity and push the pneumatic air bag 12 to compress, and the telescopic support plate 16 is also used to withstand the reaction force generated when the air inside the pneumatic cavity is discharged during the resetting and stretching process of the pneumatic air bag 12. Since the pneumatic air bag 12 has a large stroke for each telescopic movement, it is easy to tilt, and the telescopic support plate 16 reciprocates with the pneumatic air bag 12. During the movement, the telescopic shaft 161 moves along the sealing sleeve 17 to achieve limiting, so that the pneumatic bellows 12 can always telescope along a straight line, ensuring that the bellows pump can normally transport the fluid at a large flow rate; in addition, the outer side of the sealing sleeve 17 is fixedly connected to the fixed plate 51, and the interior of the sealing sleeve 17 is provided with sealing rubber and other structures to prevent the compressed air inside the pneumatic cavity from leaking along the surface of the telescopic shaft 161, thereby ensuring the airtightness inside the pneumatic cavity. At the same time, the sealing sleeve 17 will not affect the normal movement of the telescopic shaft 161, and can also suppress the swing to enable the telescopic shaft 161 to maintain a higher stability during the movement.

[0038] As one of the preferred embodiments of the present invention, Figure 1As shown, a fixed frame 5 is sleeved on the outside of the pneumatic mechanism 1, and the fixed frame 5 includes a fixed plate 51 and a fixed rod 52. The fixed plate 51 is provided with two pieces and is fixedly connected to the two ends of the pneumatic housing 11 respectively. The fixed rod 52 is provided with a plurality of pieces and is arranged between the two fixed plates 51; the fixed frame 5 serves as a fixing structure of the pneumatic mechanism 1 and other components, which can improve the structural stability of the air bag pump. The two fixed plates 51 are fixed by a plurality of fixed rods 52, and the fluid mechanism 2 and the two pneumatic housings 11 are firmly clamped by the two fixed plates 51 to avoid a large gap between the fixed plate 51 and the pneumatic housing 11 and between the pneumatic housing 11 and the fluid mechanism 2, thereby ensuring the sealing inside the air bag pump; in addition, a carrying port is provided on the top of the fixed plate 51 to facilitate the operator to carry the air bag pump, and a supporting foot and a fixing hole allowing the fixing bolt to be inserted are provided at the bottom of the fixed plate 51, so that the air bag pump can be stably placed and further fixed by the fixing hole and the fixing bolt, thereby avoiding the air bag pump from leaving the original position due to vibration during movement, thereby reducing safety hazards.

[0039] As one of the preferred embodiments of the present invention, Figure 3 , Figure 6 , Figure 8 As shown, a circle of fluid sealing grooves 25 are provided on both sides of the fluid mechanism 2, and a circle of fluid sealing rings 18 are provided on the edge of one end of the pneumatic air bag 12 near the fluid mechanism 2, and the fluid sealing ring 18 is embedded in the fluid sealing groove 25; the fluid sealing groove 25 and the fluid sealing ring 18 match each other, and the fluid sealing ring 18 is preferably made of sealing rubber. Embedding the fluid sealing ring 18 in the fluid sealing groove 25 can improve the sealing performance between the pneumatic air bag 12 and the fluid mechanism 2, and prevent the fluid from leaking out of the fluid cavity along the gap between the pneumatic air bag 12 and the fluid mechanism 2, thereby preventing some corrosive or dangerous fluids from corroding other equipment or causing safety accidents, thereby improving the safety of the air bag pump.

[0040] As one of the preferred embodiments of the present invention, Figure 4 As shown, a circle of gas sealing ring 19 is provided on the inner wall of one end of the pneumatic housing 11 close to the fluid mechanism 2, and the surface of the gas sealing ring 19 is in contact with the surface of the fluid mechanism 2; the gas sealing ring 19 is preferably made of sealing rubber, and the gas sealing ring 19 is arranged at the intersection of the pneumatic housing 11 and the fluid mechanism 2 to improve the airtightness of the cooperation between the two, avoid the leakage of high-pressure air when the compressed air enters the pneumatic cavity to form a positive pressure, ensure that the positive pressure inside the pneumatic cavity is sufficient to drive the pneumatic bellows 12 to compress, and ensure the normal operation of the bellows pump.

[0041] In summary, the present invention allows compressed air to alternately enter the two pneumatic chambers to alternately expand and contract the two pneumatic air bags 12. During the expansion and contraction process of the pneumatic air bags 12, negative pressure and positive pressure are alternately formed inside, thereby sucking the fluid from the suction channel 21 and then discharging it from the discharge channel 22. At the same time, the pneumatic air bags 12 are allowed to smoothly expand and contract through the telescopic shaft 161, so that a large flow rate and stable fluid transportation can be performed. When the fluid enters and leaves the fluid cavity, it is buffered by the buffer layer 15, which buffers the impact force on the inner wall of the pneumatic air bag 12 when the amount of fluid inside the fluid cavity changes, and the kinetic energy loss of the fluid is small, thereby ensuring a large flow rate of fluid transportation.

[0042] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A large-flow bellows pump, comprising a pneumatic mechanism (1) and a fluid mechanism (2), characterized in that: The pneumatic mechanism (1) comprises the following structure: a pneumatic housing (11); the interior of the pneumatic housing (11) is hollow and is divided into two pneumatic chambers by a fluid mechanism (2); a pneumatic air bag (12) is provided in each of the pneumatic chambers; a fluid chamber is formed between the interior of the pneumatic air bag (12) and the fluid mechanism (2); and a gas source interface (13) and a liquid leakage alarm sensor (14) extending to the outside of the pneumatic housing (11) are provided on one side of the pneumatic chamber; The fluid mechanism (2) is provided with an inlet passage (21) and an outlet passage (22) both extending to the inside of the pneumatic air bag (12); one side of the inlet passage (21) is provided with an inlet interface (3) extending to the outside of the fluid mechanism (2); opposite ends of the inlet passage (21) are provided with inlet ports respectively connected to the inside of the two pneumatic air bags (12); an inlet valve (23) is provided in the inlet ports; one side of the outlet passage (22) is provided with an outlet interface (4) extending to the outside of the fluid mechanism (2); opposite ends of the outlet passage (22) are provided with outlet ports respectively connected to the inside of the two pneumatic air bags (12); an outlet valve (24) is provided in the outlet ports.

2. The large flow bellows pump according to claim 1, characterized in that: The inner diameter of the suction channel (21) at one end close to the suction port gradually increases and is fixedly connected to one end of the suction valve (23), and the other end of the suction valve (23) extends to the interior of the pneumatic air bag (12); the inner diameter of the discharge channel (22) at one end close to the discharge port gradually increases and is fixedly connected to one end of the discharge valve (24), and the other end of the discharge valve (24) extends to the interior of the pneumatic air bag (12).

3. The large flow bellows pump according to claim 1, characterized in that: A buffer layer (15) is provided on the side of the pneumatic air bag (12) away from the fluid mechanism (2); the buffer layer (15) is hollow inside and an elastic buffer plate (151) is provided on the side close to the pneumatic air bag (12); one side of the elastic buffer plate (151) is located inside the fluid cavity.

4. The large flow bellows pump according to claim 3, characterized in that: A telescopic support plate (16) is provided on the side of the buffer layer (15) away from the pneumatic air bag (12); a telescopic shaft rod (161) extending to the outside of the pneumatic housing (11) is provided on the side of the telescopic support plate (16) away from the pneumatic air bag (12); a sealing shaft sleeve (17) is provided on the surface of the telescopic shaft rod (161).

5. The large flow bellows pump according to claim 1, characterized in that: The suction valve (23) comprises a first valve body and a first shell (231) with a hollow interior. The first valve body is arranged inside the first shell (231). The first shell (231) is provided with a first through hole (232) extending through both ends along the axis. The first valve body is provided with a first elastic member (233) at one end away from the suction port, the end of which abuts against the inner wall of the first shell (231), and a first sealing end head (234) having a conical end and matching with one end of the first through hole (232).

6. The large flow bellows pump according to claim 1, characterized in that: The discharge valve (24) comprises a second valve body and a second hollow shell (241), wherein the second valve body is arranged inside the second shell (241), and the second shell (241) is provided with a second through hole (242) extending through both ends along the axis, and the second valve body is provided with a second elastic member (243) whose end abuts against the inner wall of the second shell (241) at one end close to the discharge port, and a second sealing end head (244) having a conical end and matching with one end of the second through hole (242) at the other end.

7. The large flow bellows pump according to claim 1, characterized in that: A fixed frame (5) is sleeved on the outside of the pneumatic mechanism (1), the fixed frame (5) comprising a fixed plate (51) and a fixed rod (52), the fixed plates (51) being provided in two pieces and being respectively fixedly connected to two ends of the pneumatic housing (11), and the fixed rods (52) being provided in a plurality and being arranged between the two fixed plates (51).

8. The large flow bellows pump according to claim 1, characterized in that: A circle of fluid sealing grooves (25) are provided on both sides of the fluid mechanism (2), and a circle of fluid sealing rings (18) are provided on the edge of one end of the pneumatic air bag (12) close to the fluid mechanism (2), and the fluid sealing ring (18) is embedded in the fluid sealing grooves (25).

9. The large flow bellows pump according to claim 1, characterized in that: A circle of gas sealing ring (19) is provided on the inner wall of one end of the pneumatic housing (11) close to the fluid mechanism (2), and the surface of the gas sealing ring (19) abuts against the surface of the fluid mechanism (2).

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