Device for recycling tail gas and increasing water outlet pressure of pneumatic diaphragm pump

Abstract

The invention provides a device for recycling tail gas and increasing water outlet pressure of a pneumatic diaphragm pump, and belongs to the technical field of pneumatic diaphragm pumps. The technical problem that tail gas energy of an existing pneumatic diaphragm pump is lost is solved. The device comprises a left diaphragm chamber and a right diaphragm chamber which are oppositely arranged, the left diaphragm chamber and the right diaphragm chamber are connected with a water outlet pipeline, a water inlet pipeline and a pump body, a gas inlet and a gas outlet are formed in the pump body, a water outlet is formed in the middle of the water outlet pipeline, and a recycling pressurizing device is connected between the water outlet pipeline and the gas outlet. The recycling supercharging device comprises an air inlet pipeline, an air storage pipeline, a one-way pipeline and an air outlet pipeline which are sequentially communicated, the axis of the one-way pipeline is higher than that of the air outlet pipeline, the air outlet pipeline is fixedly connected with the water outlet pipeline and is opposite to the water outlet, the air inlet pipeline is fixedly connected with the air outlet, and a one-way valve is arranged on the one-way pipeline. The water outlet pressure of the water outlet is increased by recycling tail gas, and the tail gas recycling efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of pumps, in particular to a device for recovering tail gas from a pneumatic diaphragm pump and increasing outlet water pressure. Background Art

[0002] The pneumatic diaphragm pump includes two symmetrical working chambers, each of which is equipped with an elastic diaphragm. The two diaphragms of the connecting rod shaft are connected as a whole. After the compressed air enters the gas distribution valve from the air inlet joint of the pump, the high-pressure gas in the valve chamber drives the connecting rod shaft to reciprocate left and right through the air flow guidance system. At the same time, the relatively low-pressure gas after consumption is quickly discharged through the exhaust port. Under the alternating action of high and low-pressure gases on both sides, the connecting rod shaft drives the diaphragms on both sides to move left and right, so that the air pressure in the volume chambers on both sides changes alternately, thereby realizing continuous suction and discharge of liquid. The existing technology generally adopts the installation of multi-layer noise reduction devices at the exhaust port, and reduces the exhaust pressure and noise through a maze-like channel and air flow deceleration design, so as to comprehensively solve the problem of high pressure of exhaust gas. In this way, the huge energy contained in the release of high-pressure exhaust gas is also lost, resulting in low efficiency of compressed air utilization.

[0003] In order to better solve the above problems, the existing technology, such as a diaphragm pump exhaust energy recovery and utilization device with patent number 202022050116X, although the device realizes the recovery of exhaust energy through a boosting mechanism and a multi-way pipeline design, the device involves multiple components such as left and right recovery pipelines, stroke valves, distribution valves, and boosting mechanisms. The piping system is complex (such as integrated pipelines, branch pipes, high-pressure pipes, etc.). The complex structure not only increases the difficulty of installation, but may also lead to an increase in failure points, and the exhaust gas is discharged from the R outlet of the distribution valve into three routes. The first route of exhaust gas is released to the atmosphere by the exhaust valve and has a high back pressure. The second route is through the one-way valve and enters the right power chamber through the integrated pipeline. The third route is boosted by the boosting mechanism and then enters the right power chamber through the boosting one-way valve. The exhaust gas discharged in three routes is not better utilized because of the energy lost in the complex piping system. Summary of the invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a device for recovering tail gas from a pneumatic diaphragm pump and increasing the outlet water pressure. The technical problem to be solved by the present invention is how to better recover the tail gas of the pneumatic diaphragm pump and use it to increase the outlet water pressure of the diaphragm pump to achieve a higher head.

[0005] The purpose of the present invention can be achieved through the following technical solutions: a pneumatic diaphragm pump tail gas recovery and water outlet pressure increasing device, comprising a left diaphragm chamber and a right diaphragm chamber that are arranged relatively to each other, the upper ends of the left diaphragm chamber and the right diaphragm chamber are connected to a water outlet pipe, the lower ends of the left diaphragm chamber and the right diaphragm chamber are connected to a water inlet pipe, the middle of the left diaphragm chamber and the right diaphragm chamber is connected to a pump body, an air inlet and an air outlet are arranged on the pump body, a water outlet is arranged in the middle of the water outlet pipe, the axis of the water outlet is arranged horizontally, the inner diameter of the water outlet pipe gradually decreases from the left diaphragm chamber and the right diaphragm chamber to the water outlet, a recovery and pressurizing device is connected between the water outlet pipe and the air outlet, the recovery and pressurizing device comprises an air inlet pipe, an air storage pipe, a one-way pipe and an air outlet pipe that are connected in sequence, the axis of the one-way pipe is higher than the axis of the air outlet pipe, the air outlet pipe is fixedly connected to the water outlet pipe and arranged relatively to the water outlet, the air inlet pipe and the air outlet are fixedly connected, and a one-way valve is arranged on the one-way pipe.

[0006] This solution recovers the exhaust gas from the air outlet, and stores and buffers the exhaust gas through the air storage pipe to reach a stable pressure, which is then sprayed out from the air outlet pipe to increase the water outlet pressure of the water outlet. The inner diameter of the water outlet pipe is set to gradually decrease from the left diaphragm chamber and the right diaphragm chamber to the water outlet, so that the airflow in the air outlet pipe can better assist the water outlet to carry away the water flow, form a larger negative pressure near the water outlet, and improve the head of the diaphragm pump.

[0007] Furthermore, the one-way valve includes a valve core, a valve seat and a valve shell, the valve core includes a blocking portion, an air inlet portion, a guide portion and an air guide portion, the valve seat includes a fixed portion and a first annular portion and a second annular portion protruding in the same direction along one end of the fixed portion, the length of the first annular portion is greater than the length of the second annular portion, a U-shaped groove is formed between the first annular portion and the second annular portion, a reset spring is arranged in the U-shaped groove, one end of the reset spring abuts against the U-shaped groove and the other end abuts against the guide portion, the outer circumference of the guide portion axially slides against the inner circumference of the first annular portion, and the outer circumference of the air guide portion axially slides against the inner circumference of the second annular portion. This solution can stably install the reset spring and make the valve core and the valve seat cooperate better so that the airflow can pass through the one-way valve better by setting a U-shaped groove.

[0008] Furthermore, one end of the valve housing is fixedly connected to the valve seat and the other end is fixedly connected to the gas storage pipeline, one end of the gas storage pipeline is fixedly connected to the plugging hole piece, and the plugging part cooperates with the plugging hole piece. When the plugging part abuts against the plugging hole piece, the one-way valve is closed, and when the plugging part is away from the plugging hole piece, the one-way valve is opened.

[0009] Furthermore, a barrier ring 1 and a barrier ring 2 are fixedly arranged in the air intake duct, the barrier ring 2 is located above the barrier ring 1, a barrier rod is movably connected in the barrier ring 2, and the lower end of the barrier rod abuts against the end face of the barrier ring 1.

[0010] The partition ring 1 and the partition ring 2 of the present scheme can be formed as an insert and integrated with the air intake pipe, or can be fixedly connected to the air intake pipe by welding. The upper end of the partition rod is inserted into the partition ring 2, and the lower end of the partition rod is an expansion ring. The lower end of the partition rod is abutted against the upper end surface of the partition ring 1 by utilizing the gravity of the partition rod itself or by arranging a spring between the partition rod and the partition ring 2, so that the airflow can be better stored in the air storage pipe, forming a stable air pressure, so that the air outlet pipe has a more stable outlet pressure.

[0011] Furthermore, the air intake pipe is fixedly provided with a baffle ring 1 and a baffle ring 2, the baffle ring 2 is located above the baffle ring 1, the baffle ring 2 is fixedly connected to a fixing rod, the lower end of the fixing rod is fixedly connected to a one-way diaphragm, and the one-way diaphragm abuts against the baffle ring 1. The fixing rod is fixed to the baffle ring 2 by a fixing nut, and the one-way diaphragm abuts against the baffle ring 1 so that the airflow is better stored in the air storage pipe, forming a stable air pressure, so that the air outlet pipe has a more stable outlet pressure.

[0012] Furthermore, a spiral wheel 1 is rotatably arranged in the air inlet pipe, and the spiral wheel 1 is located between the baffle ring 1 and the air outlet. In this solution, the spiral wheel 1 axially and orderly absorbs the exhaust gas from the air outlet, and axially sucks it into the air storage pipe for storage, forming a stable air pressure, so that the air outlet pipe has a more stable air outlet pressure.

[0013] Furthermore, the recovery and pressurizing device also includes a volute, the volute has an air inlet channel and an air outlet channel, the air inlet channel and the air outlet channel are perpendicular, one end of the air outlet channel is fixedly connected to the air inlet pipe, one end of the air inlet channel is fixedly connected to the air inlet seat, the air inlet seat is fixed on the air outlet, the air inlet seat has at least two through holes, the volute and the air inlet seat form a mounting cavity, and an impeller assembly is rotatably arranged in the mounting cavity. This solution absorbs the exhaust gas axially through the impeller assembly and the volute, pressurizes it in the volute, and then radially transports it to the air storage pipeline, so that the air outlet pipeline has a more stable air outlet pressure, so that the airflow of the air outlet pipeline can better assist the water outlet to carry away the water flow, form a larger negative pressure near the water outlet, and improve the head of the diaphragm pump.

[0014] Furthermore, the impeller assembly includes a rotating shaft and a first impeller and a second spiral wheel fixedly mounted on the rotating shaft. Both ends of the rotating shaft are rotatably fixed to the volute and the air inlet seat through bearings. The first impeller is arranged opposite to the air outlet channel, and the second spiral wheel is arranged opposite to the air inlet channel.

[0015] Furthermore, a second impeller and a guide vane are arranged between the first impeller and the second spiral wheel, a drainage seat is fixedly arranged in the installation cavity, the guide vane is fixed in the drainage seat, a drainage channel is formed between the air inlet seat, the drainage seat and the guide vane, and the drainage channel connects the air inlet channel and the air outlet channel. This solution uses double-layer pressurization to better absorb the exhaust gas at the outlet.

[0016] Furthermore, the air inlet seat has an inclined arc surface relative to the second impeller, and at least two arc protrusions protrude from the inclined arc surface toward the guide vane. The guide vane includes a circular plate and a spiral block protruding along the outer circumference of the circular plate and equal to the number of arc protrusions. The lower end of the spiral block abuts against the upper end of the arc protrusion. The circular plate has a wind shield ring protruding toward the impeller, and the lower end face of the wind shield ring is infinitely close to the air outlet of the second impeller. A drainage channel is formed between the inclined arc surface, the arc protrusion and the spiral block. The drainage channel of this scheme forms a separate spiral flow channel between the arc protrusion and the spiral block, and then is guided to the back of the circular plate by the inclined arc surface. There is also a spiral flow channel formed by the spiral block on the back of the circular plate. The airflow can be guided to the first impeller in an orderly and stable manner. The airflow is again pressurized by the first impeller and transported to the air storage pipe to form a stable air pressure so that the airflow in the air outlet pipe can better assist the water outlet to carry away the water flow, forming a larger negative pressure near the water outlet, thereby increasing the head of the diaphragm pump.

[0017] Compared with the prior art, the technical effect of the present invention is as follows: by recovering the exhaust gas from the air outlet, and storing and buffering the exhaust gas through the air storage pipe to reach a stable pressure, and then spraying it out from the air outlet pipe to increase the water outlet pressure of the water outlet, and by setting the inner diameter of the water outlet pipe to gradually decrease from the left diaphragm chamber and the right diaphragm chamber to the water outlet, the airflow in the air outlet pipe can better assist the water outlet to carry away the water flow, forming a larger negative pressure near the water outlet, and improving the head of the diaphragm pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a stereogram of embodiment 1 of the present invention.

[0019] Figure 2 It is a cross-sectional view of an embodiment of the present invention.

[0020] Figure 3 It is a cross-sectional view of a recovery and pressurizing device according to Embodiment 1 of the present invention.

[0021] Figure 4 It is an enlarged view of point A of Example 1 of the present invention.

[0022] Figure 5 It is an enlarged view of point B of Example 1 of the present invention.

[0023] Figure 6 It is an exploded view of a recovery and pressurizing device according to a first embodiment of the present invention.

[0024] Figure 7 It is an exploded view of the guide vanes and the air inlet seat in the recovery supercharging device according to the first embodiment of the present invention.

[0025] Figure 8 It is a cross-sectional view of the recovery and pressurization device of embodiment 2 of the present invention.

[0026] Figure number marking: 1, left diaphragm chamber; 2, right diaphragm chamber; 3, water outlet pipe; 301, water outlet; 4, water inlet pipe; 401, water inlet; 5, pump body; 501, air inlet; 502, air outlet; 6, air inlet pipe; 7, air storage pipe; 8, one-way pipe; 9, air outlet pipe; 10, one-way valve; 101, valve core; 1011, blocking part; 1012, air inlet; 1013, guide part; 1014, air guide part; 102, valve seat; 1021, fixing part; 1022, first annular part; 1023, second annular part; 1024, U-shaped groove; 103, valve housing; 104, Return spring; 11. Blocking hole piece; 12. Spacer ring one; 13. Spacer ring two; 14. Spacer rod; 15. Fixed rod; 16. One-way diaphragm; 17. Spiral wheel one; 18. Volute; 1801. Air inlet channel; 1802. Air outlet channel; 19. Air inlet seat; 1901. Through hole; 1902. Inclined arc surface; 1903. Arc convex block; 20. Mounting cavity; 21. Rotating shaft; 22. First impeller; 23. Spiral wheel two; 24. Second impeller; 25. Guide vane; 2501. Round plate; 2502. Spiral block; 2503. Wind shield ring; 26. Drainage seat; 27. Drainage channel. DETAILED DESCRIPTION

[0027] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0028] It should be noted that the descriptions of the present invention regarding directions such as “up”, “down”, “left”, “right”, “top” and “bottom” are all defined based on the relationships between the orientations or positions shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device must be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0029] Embodiment 1: Figure 1 , Figure 2As shown, a device for recovering tail gas from a pneumatic diaphragm pump and increasing outlet water pressure comprises a left diaphragm chamber 1 and a right diaphragm chamber 2 which are arranged relatively to each other, the upper ends of the left diaphragm chamber 1 and the right diaphragm chamber 2 are connected to an outlet pipe 3, a water outlet 301 is provided in the middle of the outlet pipe 3, the inner diameter of the outlet pipe 3 gradually decreases from the left diaphragm chamber 1 and the right diaphragm chamber 2 to the water outlet 301, the lower ends of the left diaphragm chamber 1 and the right diaphragm chamber 2 are connected to an inlet pipe 4, a water inlet 401 is provided in the middle of the inlet pipe 4, the inner diameter of the inlet pipe 4 gradually decreases from the left diaphragm chamber 1 and the right diaphragm chamber 2 to the water inlet 401, the middle of the left diaphragm chamber 1 and the right diaphragm chamber 2 is connected to a pump body 5, an air inlet 501 and an air outlet 502 are provided on the pump body 5, the axis of the water outlet 301 is arranged horizontally, and a recovery and pressurizing device is connected between the outlet pipe 3 and the air outlet 502.

[0030] like Figure 2 , Figure 3 As shown, the recovery and boosting device includes an air intake pipe 6, an air storage pipe 7, a one-way pipe 8 and an air outlet pipe 9 which are connected in sequence. A one-way valve 10 is arranged on the one-way pipe 8. The axis of the one-way pipe 8 is higher than the axis of the air outlet pipe 9. The air outlet pipe 9 is fixedly connected to the water outlet pipe 3 and arranged opposite to the water outlet 301, that is, the axis of the air outlet pipe 9 and the water outlet 301 are consistent, and the air intake pipe 6 is fixedly connected to the air outlet 502. The recovery and boosting device recovers the tail gas from the air outlet 502, and the tail gas is stored and buffered by the air storage pipe 7 to reach a stable pressure, and then ejected from the air outlet pipe 9 to increase the outlet pressure of the water outlet 301, and the inner diameter of the water outlet pipe 3 is set to gradually decrease from the left diaphragm chamber 1 and the right diaphragm chamber 2 to the water outlet 301, so that the airflow of the air outlet pipe 9 can better assist the water outlet 301 to take away the water flow, and a greater negative pressure is formed near the water outlet 301, thereby improving the head of the diaphragm pump.

[0031] like Figure 3 , Figure 4As shown, the one-way valve 10 includes a valve core 101, a valve seat 102 and a valve housing 103. The valve core 101 includes a blocking portion 1011, an air inlet portion 1012, a guide portion 1013 and an air guide portion 1014. The valve seat 102 includes a fixing portion 1021 and a first annular portion 1022 and a second annular portion 1023 protruding in the same direction along one end of the fixing portion 1021. The length of the first annular portion 1022 is greater than the length of the second annular portion 1023. A U-shaped groove 1024 is formed between the annular portion 1022 and the second annular portion 1023. A reset spring 104 is arranged in the U-shaped groove 1024. One end of the reset spring 104 abuts against the U-shaped groove 1024 and the other end abuts against the guide portion 1013. The outer circumference of the guide portion 1013 and the inner circumference of the first annular portion 1022 slide axially against each other, and the outer circumference of the air guide portion 1014 and the inner circumference of the second annular portion 1023 slide axially against each other. The U-shaped groove 1024 can not only stably install the reset spring 104, but also make the valve core 101 and the valve seat 102 better match so that the air flow can pass through the one-way valve 10 better. One end of the valve housing 103 is fixedly connected to the valve seat 102 and the other end is fixedly connected to the gas storage pipeline 7. One end of the gas storage pipeline 7 is fixedly connected to the blocking hole member 11, and the blocking portion 1011 matches the blocking hole member 11. When the blocking portion 1011 abuts against the blocking hole member 11 , the one-way valve 10 is closed, and when the blocking portion 1011 abuts against the blocking hole member 11 , the one-way valve 10 is opened.

[0032] like Figure 3 , Figure 5 , Figure 6 , Figure 7As shown, the recovery and boosting device also includes a volute 18, which has an air inlet channel 1801 and an air outlet channel 1802, the air inlet channel 1801 and the air outlet channel 1802 are perpendicular, one end of the air outlet channel 1802 is fixedly connected to the air inlet pipe 6, one end of the air inlet channel 1801 is fixedly connected to the air inlet seat 19, the air inlet seat 19 is fixed on the air outlet 502, and the air inlet seat 19 has a plurality of through holes 1901, the volute 18 and the air inlet seat 19 form a mounting chamber 20, and an impeller assembly is rotatably arranged in the mounting chamber 20. The exhaust gas is axially absorbed by the impeller assembly and the volute 18, and then pressurized in the volute 18 and radially transported to the air storage pipe 7, so that the air outlet pipe 9 has a more stable air outlet pressure, so that the airflow of the air outlet pipe 9 can better assist the water outlet 301 to take away the water flow, and a greater negative pressure is formed near the water outlet 301, thereby improving the head of the diaphragm pump. The impeller assembly includes a rotating shaft 21 and a first impeller 22 and a second spiral wheel 23 fixedly disposed on the rotating shaft 21. The two ends of the rotating shaft 21 are rotatably fixed on the volute 18 and the air inlet seat 19 through bearings. The first impeller 22 is disposed opposite to the air outlet passage 1802, and the second spiral wheel 23 is disposed opposite to the air inlet passage 1801. A second impeller 24 and a guide vane 25 are disposed between the first impeller 22 and the second spiral wheel 23. A drainage seat 26 is fixedly disposed in the installation cavity 20, and the guide vane 25 is fixed in the drainage seat 26. A drainage channel 27 is formed between the air inlet seat 19, the drainage seat 26 and the guide vane 25, and the drainage channel 27 connects the air inlet passage 1801 and the air outlet passage 1802. Through double-layer supercharging, the exhaust gas at the air outlet 502 is better absorbed. The air inlet seat 19 has an inclined arc surface 1902 relative to the second impeller 24, and at least two arc protrusions 1903 protrude from the inclined arc surface 1902 toward the guide vane 25. The guide vane 25 includes a circular plate 2501 and spiral blocks 2502 protruding along the outer circumference of the circular plate 2501 and equal in number to the arc protrusions 1903. The lower end of the spiral block 2502 abuts against the upper end of the arc protrusion 1903. The circular plate 2501 protrudes toward the impeller with a wind shield ring 2503, and the lower end surface of the wind shield ring 2503 is infinitely close to the air outlet of the second impeller 24. A drainage channel 27 is formed between the inclined arc surface 1902, the arc protrusions 1903 and the spiral blocks 2502. The drainage channel 27 forms a separate spiral flow channel between the arc protrusion 1903 and the spiral block 2502, and then is guided to the back of the circular plate 2501 by the inclined arc surface 1902. There is also a spiral flow channel formed by the spiral block 2502 on the back of the circular plate 2501. The airflow can be guided to the first impeller 22 in an orderly and stable manner. The airflow is again pressurized by the first impeller 22 and transported to the air storage pipe 7 to form a stable air pressure, so that the airflow in the air outlet pipe 9 can better assist the water outlet 301 to carry away the water flow, and a larger negative pressure is formed near the water outlet 301, thereby increasing the head of the diaphragm pump.

[0033] The air intake pipe 6 is fixedly provided with a baffle ring 12 and a baffle ring 2 13. The baffle ring 2 13 is located above the baffle ring 12. A baffle rod 14 is movably connected to the baffle ring 2 13. The lower end of the baffle rod 14 abuts against the end face of the baffle ring 12. The baffle ring 12 and the baffle ring 2 13 can be integrally formed with the air intake pipe 6 as inserts or fixedly connected with the air intake pipe 6 by welding. The upper end of the baffle rod 14 is inserted into the baffle ring 2 13. The lower end of the baffle rod 14 is an expansion ring. The lower end of the baffle rod 14 abuts against the upper end face of the baffle ring 1 12 by using the gravity of the baffle rod 14 itself or by setting a spring between the baffle rod 14 and the baffle ring 2 13, so that the airflow is better stored in the air storage pipe 7, forming a stable air pressure, so that the air outlet pipe 9 has a more stable outlet pressure.

[0034] Embodiment 2: Figure 8 As shown, different from the first embodiment, this embodiment adopts axial supercharging to absorb tail gas, and a baffle ring 12 and a baffle ring 2 13 are fixedly arranged in the air intake pipe 6, and the baffle ring 2 13 is located above the baffle ring 12, and the baffle ring 2 13 is fixedly connected to the fixing rod 15, and the lower end of the fixing rod 15 is fixedly connected to the one-way diaphragm 16, and the one-way diaphragm 16 abuts against the baffle ring 12. The fixing rod 15 is fixed to the baffle ring 2 13 by a fixing nut, and the one-way diaphragm 16 abuts against the baffle ring 12 so that the airflow is better stored in the air storage pipe 7, forming a stable air pressure. A spiral wheel 17 is rotatably arranged in the air intake pipe 6, and the spiral wheel 17 is located between the baffle ring 12 and the air outlet 502. The exhaust gas of the air outlet 502 is axially and orderly absorbed by the spiral wheel 17, and axially sucked into the air storage pipe 7 for storage, forming a stable air pressure, so that the outlet pipe 9 has a more stable outlet pressure.

[0035] The above embodiments are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Therefore, any equivalent changes made based on the structure, shape, and principle of the present invention should be included in the protection scope defined by the claims of the present invention.

Claims

1. A device for increasing the outlet water pressure of an exhaust gas recovery of a pneumatic diaphragm pump, comprising a left diaphragm chamber (1) and a right diaphragm chamber (2) arranged opposite to each other, the upper ends of the left diaphragm chamber (1) and the right diaphragm chamber (2) being connected to an outlet water pipe (3), the lower ends of the left diaphragm chamber (1) and the right diaphragm chamber (2) being connected to an inlet water pipe (4), the middle of the left diaphragm chamber (1) and the right diaphragm chamber (2) being connected to a pump body (5), the pump body (5) being provided with an air inlet (501) and an air outlet (502), characterized in that: The water outlet pipe (3) has a water outlet (301) in the middle, the axis of the water outlet (301) is arranged horizontally, the inner diameter of the water outlet pipe (3) gradually decreases from the left diaphragm chamber (1) and the right diaphragm chamber (2) to the water outlet (301), a recovery and pressurizing device is connected between the water outlet pipe (3) and the air outlet (502), the recovery and pressurizing device comprises an air intake pipe (6), an air storage pipe (7), a one-way pipe (8) and an air outlet pipe (9) which are connected in sequence, the axis of the one-way pipe (8) is higher than the axis of the air outlet pipe (9), the air outlet pipe (9) is fixedly connected to the water outlet pipe (3) and arranged opposite to the water outlet (301), the air intake pipe (6) and the air outlet (502) are fixedly connected, and a one-way valve (10) is arranged on the one-way pipe (8).

2. The device for recovering tail gas from a pneumatic diaphragm pump and increasing outlet water pressure according to claim 1, characterized in that: The one-way valve (10) comprises a valve core (101), a valve seat (102) and a valve housing (103); the valve core (101) comprises a blocking portion (1011), an air inlet portion (1012), a guide portion (1013) and an air guide portion (1014); the valve seat (102) comprises a fixing portion (1021) and a first annular portion (1022) and a second annular portion (1023) protruding in the same direction along one end of the fixing portion (1021); the length of the first annular portion (1022) is greater than the length of the second annular portion (1023). A U-shaped groove (1024) is formed between the first annular portion (1022) and the second annular portion (1023), a return spring (104) is arranged in the U-shaped groove (1024), one end of the return spring (104) abuts against the U-shaped groove (1024) and the other end abuts against the guide portion (1013), the outer circumferential surface of the guide portion (1013) and the inner circumferential surface of the first annular portion (1022) axially slide against each other, and the outer circumferential surface of the air guide portion (1014) and the inner circumferential surface of the second annular portion (1023) axially slide against each other.

3. The device for recovering tail gas from a pneumatic diaphragm pump and increasing outlet water pressure according to claim 2, characterized in that: One end of the valve housing (103) is fixedly connected to the valve seat (102) and the other end is fixedly connected to the gas storage pipeline (7). One end of the gas storage pipeline (7) is fixedly connected to the plugging hole component (11). The plugging portion (1011) cooperates with the plugging hole component (11).

4. The device for recovering tail gas from a pneumatic diaphragm pump and increasing outlet water pressure according to claim 1, characterized in that: A barrier ring 1 (12) and a barrier ring 2 (13) are fixedly arranged in the air intake duct (6); the barrier ring 2 (13) is located above the barrier ring 1 (12); a barrier rod (14) is movably connected in the barrier ring 2 (13); the lower end of the barrier rod (14) abuts against the end surface of the barrier ring 1 (12).

5. The device for recovering tail gas from a pneumatic diaphragm pump and increasing outlet water pressure according to claim 1, characterized in that: A baffle ring 1 (12) and a baffle ring 2 (13) are fixedly arranged in the air intake duct (6); the baffle ring 2 (13) is located above the baffle ring 1 (12); the baffle ring 2 (13) is fixedly connected to a fixing rod (15); the lower end of the fixing rod (15) is fixedly connected to a one-way diaphragm (16); and the one-way diaphragm (16) abuts against the baffle ring 1 (12).

6. A device for recovering tail gas from a pneumatic diaphragm pump and increasing outlet water pressure according to any one of claims 4 or 5, characterized in that: A spiral wheel (17) is rotatably arranged in the air intake duct (6), and the spiral wheel (17) is located between the baffle ring (12) and the air outlet (502).

7. A device for recovering tail gas from a pneumatic diaphragm pump and increasing outlet water pressure according to any one of claims 1 to 5, characterized in that: The recovery and boosting device also includes a volute (18), the volute (18) having an air inlet channel (1801) and an air outlet channel (1802), the air inlet channel (1801) and the air outlet channel (1802) being perpendicular to each other, one end of the air outlet channel (1802) being fixedly connected to an air inlet pipe (6), one end of the air inlet channel (1801) being fixedly connected to an air inlet seat (19), the air inlet seat (19) being fixed on an air outlet (502), the air inlet seat (19) having at least two through holes (1901), the volute (18) and the air inlet seat (19) forming an installation cavity (20), an impeller assembly being rotatably arranged in the installation cavity (20).

8. The device for recovering tail gas from a pneumatic diaphragm pump and increasing outlet water pressure according to claim 7, characterized in that: The impeller assembly comprises a rotating shaft (21), a first impeller (22) and a second spiral wheel (23) fixedly arranged on the rotating shaft (21); both ends of the rotating shaft (21) are rotatably fixed on the volute (18) and the air inlet seat (19) through bearings; the first impeller (22) is arranged opposite to the air outlet channel (1802), and the second spiral wheel (23) is arranged opposite to the air inlet channel (1801).

9. The device for recovering tail gas from a pneumatic diaphragm pump and increasing outlet water pressure according to claim 8, characterized in that: A second impeller (24) and a guide vane (25) are arranged between the first impeller (22) and the second spiral wheel (23); a drainage seat (26) is fixedly arranged in the installation cavity (20); the guide vane (25) is fixed in the drainage seat (26); a drainage channel (27) is formed between the air inlet seat (19), the drainage seat (26) and the guide vane (25); and the drainage channel (27) connects the air inlet channel (1801) and the air outlet channel (1802).

10. The device for recovering tail gas from a pneumatic diaphragm pump and increasing outlet water pressure according to claim 9, characterized in that: The air inlet seat (19) has an inclined arc surface (1902) relative to the second impeller (24), and at least two arc protrusions (1903) protrude from the inclined arc surface (1902) toward the guide vane (25). The guide vane (25) includes a circular plate (2501) and spiral blocks (2502) protruding along the outer circumference of the circular plate (2501) and having the same number as the arc protrusions (1903). The lower end of the spiral block (2502) abuts against the upper end of the arc protrusion (1903). The circular plate (2501) has a wind shield ring (2503) protruding toward the impeller, and the lower end surface of the wind shield ring (2503) is infinitely close to the air outlet of the second impeller (24). A drainage channel (27) is formed between the inclined arc surface (1902), the arc protrusions (1903) and the spiral blocks (2502).

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