Exhaust and pressure relief diaphragm pump

Abstract

The utility model discloses an exhaust pressure relief diaphragm pump which comprises a pump head body, a water inlet and a water outlet are arranged on the pump head body, a water outlet cavity and a booster cavity are arranged in the pump head body, the water outlet cavity is communicated with the water outlet, the booster cavity is respectively communicated with the water inlet and the water outlet cavity through a one-way water flow control structure, and an exhaust pressure relief opening is further arranged on the pump head body. A pressure relief assembly used for exhausting and relieving pressure is arranged on a water path, communicated with the water outlet cavity, of the exhaust pressure relief opening, and when the diaphragm pump is started, the pressure relief assembly transversely moves to exhaust air in the water inlet pipeline and air entering the diaphragm pump; after the diaphragm pump stops, the pressure relief assembly transversely moves to reduce the water pressure of the water outlet cavity. An electromagnetic valve is not needed for exhausting, the structure is optimized, the cost is reduced, and the occupied volume is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid conveying equipment, in particular to an exhaust pressure relief diaphragm pump. Background Art

[0002] In the water supply system, the diaphragm pump is a commonly used water pumping component. The water inlet of the diaphragm pump is connected to the water tank, and the water outlet is connected to the pressurized tap water pipe. When the diaphragm pump starts working, it will inhale and pump out air, and the air can be compressed. The water outlet of the diaphragm pump is connected to a pressurized pipeline. There is a certain back pressure that will affect the pumping of air in the boosting chamber, which results in the diaphragm pump's air pumping ability being weak, resulting in the presence of air in the boosting chamber, causing the diaphragm pump's water pumping efficiency to be low.

[0003] In the prior art, an outlet is opened on the diaphragm pump and connected to a solenoid valve. When the diaphragm pumps water, the solenoid valve is first started to discharge the air inside the pipe at the outlet to reduce the impact of back pressure. However, the cost of using a solenoid valve is high, the volume it occupies is large, and its applicability is poor. Utility Model Content

[0004] The utility model aims to provide an exhaust and pressure relief diaphragm pump, which does not need to use a solenoid valve for exhaust, optimizes the structure, reduces the original cost, and reduces the volume occupied.

[0005] In order to solve the above technical problems, the utility model adopts the following solutions:

[0006] An exhaust and pressure relief diaphragm pump comprises a pump head body, a water inlet and a water outlet are provided on the pump head body, a water outlet chamber and a pressure boosting chamber are provided in the pump head body, the water outlet chamber is connected to the water outlet, the pressure boosting chamber is respectively connected to the water inlet and the water outlet chamber through a one-way water flow control structure, the pump head body is also provided with an exhaust and pressure relief port, a water path connected to the exhaust and pressure relief port and the water outlet chamber (13) is provided with a pressure relief component for exhaust and pressure relief, when the diaphragm pump is started, the pressure relief component moves horizontally to discharge the air in the water inlet pipeline and the air entering the diaphragm pump; after the diaphragm pump stops, the pressure relief component moves horizontally to reduce the water pressure in the water outlet chamber

[0007] Due to the adoption of the above technical solution, the pump head body is the main structure of the entire pump, carrying the main working parts of the pump. A water inlet and a water outlet are provided on the pump head body, which are used for water inlet and water outlet of the pump respectively. The water outlet chamber is the part directly connected to the water outlet, which is used to store and transfer the water outlet. The boosting chamber is connected to the water inlet and the water outlet chamber through a one-way water flow control structure, which is used to increase the pressure during the operation of the pump. This structure ensures that the water flow can only flow in a predetermined direction, that is, from the water inlet to the boosting chamber, and then from the boosting chamber to the water outlet chamber, and cannot flow in the opposite direction. The exhaust pressure relief port is a newly added opening on the basis of the existing diaphragm pump, which is used to discharge the air in the water inlet pipeline and the inside of the diaphragm pump or to reduce the pressure in the water outlet chamber when necessary. The water pressure is determined by the pressure relief component, which is a key component installed in the water channel where the exhaust and pressure relief port is connected to the water outlet chamber. It can perform the function of exhaust and pressure relief by moving horizontally. When the pump is started, the air in the water inlet pipe and the inside of the diaphragm pump needs to be discharged, and the water outlet is connected to a pressurized tap water pipe with water pressure inside. The air is not easy to discharge, which affects the water pumping performance of the diaphragm pump. At this time, the pressure relief component will move to a suitable position to allow the air to be discharged from the exhaust and pressure relief port. Similarly, when the diaphragm pump stops and the water pressure in the water outlet chamber is too high, the pressure relief component can also move to release part of the water pressure to ensure the safe operation of the pump. In this way, there is no need to use a solenoid valve to exhaust, the structure is optimized, the original cost is reduced, and the volume occupancy is reduced.

[0008] Optionally, a pump cover is provided at one end of the pump head body, and an air hole connected to the atmosphere is provided on the pump cover. The pressure relief assembly includes a control rod and an elastomer. The control rod and the inner wall of the pump head body can slide relative to each other. One end of the elastomer acts on the pump cover, and the other end acts on the control rod. A positioning sleeve is provided in the pump head body, and one end of the control rod is slidably arranged in the positioning sleeve. The inner wall of the positioning sleeve is provided with a flow limiting groove connected to the exhaust pressure relief port.

[0009] Optionally, a first sealing ring located in a positioning sleeve is embedded on the control rod.

[0010] Optionally, the elastic body is a return spring, one end of the return spring acts on the inner wall of the pump cover, and the other end acts on the left end of the control rod.

[0011] Optionally, a second sealing ring located outside the positioning sleeve is embedded in the control rod, and the second sealing ring is pressed tightly between the control rod and the inner wall of the pump head body.

[0012] Optionally, a water hole connected to the water outlet chamber is provided in the pump head body.

[0013] Optionally, it also includes a driving motor, a middle plate is provided between the outer shell of the driving motor and the pump head body, a third sealing ring is provided between one side of the middle plate and the pump head body, a boosting diaphragm is pressed between the other side of the middle plate and the outer shell, a boosting chamber is formed between the boosting diaphragm and the middle plate, a water inlet hole and a water outlet hole connected to the boosting chamber are provided on the middle plate, and a unidirectional water flow control structure is arranged on the middle plate.

[0014] Optionally, the one-way water flow control structure includes an inlet one-way valve flap and an outlet one-way valve flap, wherein the inlet one-way valve flap is fixed on the middle plate and covers the water inlet hole, and the outlet one-way valve flap is fixed on the middle plate and covers the water outlet hole.

[0015] Optionally, the output shaft of the driving motor is arranged upward, and an eccentric seat is eccentrically connected to the output shaft. A first bearing is sleeved on the outer side of the eccentric seat, a connecting rod is sleeved on the outer side of the first bearing, and a fixing sleeve is provided on the side of the connecting rod adjacent to the boost diaphragm, and the fixing sleeve is connected to the middle part of the boost diaphragm by a fixing screw.

[0016] Optionally, a top cover is provided on the top of the housing, a second bearing is embedded in the bottom surface of the top cover, and the upper end of the output shaft is connected to the inner ring of the second bearing.

[0017] The utility model has the beneficial effects:

[0018] 1. In the utility model, on the basis of the existing diaphragm pump, an exhaust pressure relief port is arranged on the pump head body, which is used to discharge the air in the water inlet pipeline and the inside of the diaphragm pump or to reduce the water pressure in the water outlet chamber when needed. The pressure relief assembly is a key component arranged on the waterway where the exhaust pressure relief port and the water outlet chamber are connected. It can perform the function of exhaust pressure relief by moving laterally. When the pump is started, the air in the water inlet pipeline and the inside of the diaphragm pump needs to be discharged, and the water outlet is connected to a pressurized tap water pipe with water pressure inside. The air is not easy to be discharged, which affects the water pumping performance of the diaphragm pump. At this time, the pressure relief assembly will move to a suitable position to allow the air to be discharged from the exhaust pressure relief port. Similarly, when the diaphragm pump stops and the water pressure in the water outlet chamber is too high, the pressure relief assembly can also move to release part of the water pressure to ensure the safe operation of the pump. In this way, there is no need to use an electromagnetic valve for exhaust, the structure is optimized, the original cost is reduced, and the volume occupancy is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the utility model.

[0020] Figure markings: 01-drive motor, 02-exhaust pressure relief port, 03-water outlet, 04-first sealing ring, 05-flow limiting groove, 06-positioning sleeve, 07-control rod, 08-housing, 09-air hole, 10-elastomer, 11-pump cover, 12-second sealing ring, 13-water outlet chamber, 14-water through hole, 15-pump head body, 16-water inlet, 17-third sealing ring, 18-middle plate, 19-water flow channel, 20-water inlet one-way valve disc, 21-water inlet hole, 22-boosting chamber, 23-water outlet one-way valve disc, 24-water outlet hole, 25-second bearing, 26-fixing sleeve, 27-top cover, 28-boosting diaphragm, 29-fixing screw, 30-connecting rod, 31-first bearing, 32-eccentric seat, 33-output shaft. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below in conjunction with the embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0022] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inside", "outside", "front", "back", "top", "bottom", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0023] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "open", "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. Example

[0024] An exhaust and pressure relief diaphragm pump comprises a pump head body 15, on which a water inlet 16 and a water outlet 03 are provided, and inside the pump head body 15 there are a water outlet chamber 13 and a pressure boosting chamber 22, the water outlet chamber 13 is connected to the water outlet 03, and the pressure boosting chamber 22 is respectively connected to the water inlet 16 and the water outlet chamber 13 through a one-way water flow control structure, and the pump head body 15 is also provided with an exhaust and pressure relief port 02, and a pressure relief component for exhausting and relieving pressure is provided on the water path connecting the exhaust and pressure relief port 02 and the water outlet chamber 13, when the diaphragm pump is started, the pressure relief component moves laterally to discharge the air in the water inlet pipe and the air entering the diaphragm pump; when the diaphragm pump stops, the pressure relief component moves laterally to reduce the water pressure in the water outlet chamber 13.

[0025] Due to the adoption of the above technical solution, Figure 1As shown, the pump head body 15 is the main structure of the entire pump, carrying the main working parts of the pump. A water inlet 16 and a water outlet 03 are provided on the pump head body 15, which are used for water inlet and water outlet of the pump respectively. The water outlet chamber 13 is the part directly connected to the water outlet 03, which is used to store and transfer the water outlet. The boosting chamber 22 is connected to the water inlet 16 and the water outlet chamber 13 through a one-way water flow control structure, which is used to increase the pressure during the operation of the pump. This structure ensures that the water flow can only flow in a predetermined direction, that is, from the water inlet 16 to the boosting chamber 22, and then from the boosting chamber 22 to the water outlet chamber 13, and cannot flow in the opposite direction. The exhaust pressure relief port 02 is a newly added opening on the basis of the existing diaphragm pump, which is used to discharge the air or pressure that enters the water inlet pipeline and the inside of the diaphragm pump when needed. The water pressure in the low water outlet chamber 13, the pressure relief assembly is a key component arranged on the water path connecting the exhaust and pressure relief port 02 and the water outlet chamber 13, it can perform the function of exhaust and pressure relief by moving horizontally, when the diaphragm pump is started, it is necessary to discharge the air in the water inlet pipe and the air entering the inside of the diaphragm pump, and the water outlet 03 is connected to a pressurized tap water pipe, which has water pressure inside, and the air is not easy to be discharged, affecting the water pumping performance of the diaphragm pump. At this time, the pressure relief assembly will move to a suitable position to allow the air to be discharged from the exhaust and pressure relief port 02. Similarly, when the diaphragm pump stops pumping water, the water pressure in the water outlet chamber 13 is too high, and the pressure relief assembly can also move to release part of the water pressure to ensure the safe operation of the pump. In this way, there is no need to use an electromagnetic valve to exhaust, the structure is optimized, the original cost is reduced, and the volume occupancy is reduced.

[0026] Furthermore, a pump cover 11 is provided at one end of the pump head body 15, and an air hole 09 connected to the atmosphere is provided on the pump cover 11. The pressure relief assembly includes a control rod 07 and an elastomer 10. The control rod 07 and the inner wall of the pump head body 15 can slide relative to each other. One end of the elastomer 10 acts on the pump cover 11, and the other end acts on the control rod 07. A positioning sleeve 06 is provided in the pump head body 15, and one end of the control rod 07 is slidably arranged in the positioning sleeve 06. The inner wall of the positioning sleeve 06 is provided with a flow limiting groove 05 connected to the exhaust pressure relief port 02.

[0027] Specifically, Figure 1As shown, a pump cover 11 is provided at the left end of the pump head body 15, and the pump cover 11 is fixedly connected to the pump head body 15. An air hole 09 connected to the atmosphere is provided on the pump cover 11. The air hole 09 allows the inside of the pump to be connected to the external atmosphere, which is very important for exhaust and pressure relief operations. The pressure relief assembly is mainly composed of a control rod 07 and an elastic body 10. The control rod 07 and the inner wall of the pump head body 15 can slide relative to each other, specifically, the control rod 07 can move in the pump head body 15 to perform exhaust and pressure relief operations. One end of the elastic body 10 acts on the pump cover 11, and the other end acts on the pump cover 11. One end acts on the control rod 07, and the elastic body 10 provides a restoring force to ensure that the control rod 07 can quickly return to the initial position when needed. Specifically, the elastic body 10 is a return spring, one end of the return spring acts on the inner wall of the pump cover 11, and the other end acts on the left end of the control rod 07. A positioning sleeve 06 is integrally formed in the pump head body 15, and the left end of the positioning sleeve 06 is open. The right end of the control rod 07 is slidably arranged in the positioning sleeve 06. The diameter of the right end of the control rod 07 is adapted to the inner diameter of the positioning sleeve 06. The positioning sleeve 06 can ensure that the control rod 07 is in In order to ensure the stability and accuracy during the movement, the inner wall of the positioning sleeve 06 is provided with a flow limiting groove 05 connected to the exhaust pressure relief port 02. The flow limiting groove 05 is a relatively narrow flow channel. Since the water outlet 03 is connected to a pressurized water pipe, the water inlet pipeline and the air pump entering the boost chamber 22 are pumped to the water outlet chamber 13, the air pressure in the water outlet chamber 13 overcomes the elastic force of the return spring and the atmospheric pressure, so that the control rod 07 moves to the left, and the air is transported from the water outlet chamber 13 through the flow limiting groove 05 to the exhaust pressure relief port 02 and discharged. After the air is discharged, the machine can proceed normally. During the water pumping operation, when the water pumping stops, the water in the water outlet chamber 13 accumulates, generating a pressure buildup, which increases the water pressure in the water outlet chamber 13 and pushes the control rod 07 to move to the left. Since the flow limiting groove 05 is relatively narrow, the water in the water outlet chamber 13 will flow from a small amount of the flow limiting groove 05 to the exhaust pressure relief port 02, thereby reducing the water pressure in the water outlet chamber 13 and achieving the purpose of pressure relief. At the same time, the flow limiting groove 05 is relatively narrow, and the water flow rate is relatively small, which will not affect the water pressure at the water outlet 03. In this way, the water pressure in the water outlet chamber 13 can be maintained within a relatively stable range.

[0028] When the pump starts and needs to be exhausted, due to the interaction between the control rod 07 and the elastomer 10, the control rod 07 will move into the pump head body 15, so that the flow limiting groove 05 is connected with the exhaust pressure relief port 02, and the air inside the pump is quickly discharged through the connection with the atmosphere through the air hole 09; when the exhaust and pressure relief is completed, the restoring force of the elastomer 10 pushes the control rod 07 back to the initial position, closing the connection between the flow limiting groove 05 and the exhaust pressure relief port 02, ensuring the normal operation of the pump system.

[0029] Furthermore, a first sealing ring 04 located in the positioning sleeve 06 is embedded on the control rod 07 .

[0030] Specifically, Figure 1As shown, the first sealing ring 04 can ensure that water or gas can only flow from the flow limiting groove 05 to the exhaust pressure relief port 02, ensuring normal exhaust pressure relief.

[0031] Furthermore, a second sealing ring 12 located outside the positioning sleeve 06 is embedded in the control rod 07 , and the second sealing ring 12 is pressed tightly between the control rod 07 and the inner wall of the pump head body 15 .

[0032] Specifically, the second sealing ring 12 can seal the gap between the control rod 07 and the inner wall of the pump head body 15 to prevent water in the water outlet cavity 13 from entering the left side of the control rod 07 and flowing out through the air hole 09, thereby reducing the risk of leakage of the diaphragm pump.

[0033] Furthermore, the pump head body 15 is provided with a water hole 14 connected to the water outlet chamber 13. Specifically, the water hole 14 is used to introduce water or air in the boost chamber 22 into the water outlet chamber 13.

[0034] Furthermore, it also includes a driving motor 01, a middle plate 18 is provided between the outer shell 08 of the driving motor 01 and the pump head body 15, a third sealing ring 17 is provided between one side of the middle plate 18 and the pump head body 15, a boosting diaphragm 28 is pressed between the other side of the middle plate 18 and the outer shell 08, a boosting chamber 22 is formed between the boosting diaphragm 28 and the middle plate 18, a water inlet hole 21 and a water outlet hole 24 connected to the boosting chamber 22 are provided on the middle plate 18, and a unidirectional water flow control structure is arranged on the middle plate 18.

[0035] Furthermore, the one-way water flow control structure includes an inlet one-way valve flap 20 and an outlet one-way valve flap 23 . The inlet one-way valve flap 20 is fixed on the middle plate 18 and covers the inlet hole 21 . The outlet one-way valve flap 23 is fixed on the middle plate 18 and covers the outlet hole 24 .

[0036] Furthermore, the output shaft 33 of the driving motor 01 is arranged upward, and an eccentric seat 32 is eccentrically connected to the output shaft 33. A first bearing 31 is sleeved on the outer side of the eccentric seat 32, and a connecting rod 30 is sleeved on the outer side of the first bearing 31. A fixing sleeve 26 is provided on the side of the connecting rod adjacent to the boost diaphragm 28, and the fixing sleeve 26 is connected to the middle part of the boost diaphragm 28 by a fixing screw 29.

[0037] Specifically, Figure 1As shown, the driving motor 01 provides power for the pump so that the pump can work normally. The output shaft 33 of the motor is set upward. The middle plate 18 is located between the driving motor 01 housing 08 and the pump head body 15, and plays a role of connection and support. A third sealing ring 17 is provided between one side of the middle plate 18 and the pump head body 15 to ensure the sealing between the pump head body 15 and the middle plate 18. A boosting diaphragm 28 is pressed between the other side of the middle plate 18 and the motor housing 08 to form a boosting chamber 22. The boosting diaphragm 28 is one of the core components of the pump. The liquid is sucked in and discharged through its reciprocating motion. A boosting chamber 22 is formed between the boosting diaphragm 28 and the middle plate 18 for storing and pressurizing the liquid. It includes an inlet check valve flap 20 and an outlet check valve flap 23 to ensure the unidirectional flow of water in the pump. The inlet check valve flap 20 is fixed to the middle plate 1 8 and covers the water inlet hole 21, only allowing liquid to enter the boosting chamber 22 from the water inlet 16. A water inlet channel is also provided in the pump head body 15, which is used to guide the source water of the water inlet 16 into the water inlet hole 21 after passing through the water inlet one-way valve flap 20. The water outlet one-way valve flap 23 is fixed on the middle plate 18 and covers the water outlet hole 24, only allowing liquid to flow from the boosting chamber 22 to the water outlet 03. An eccentric seat 32 is eccentrically connected to the output shaft 33 of the driving motor 01, and the movement of the connecting rod 30 and the boosting diaphragm 28 is driven by eccentric movement. The first bearing 31 is used to reduce the friction between the eccentric seat 32 and the connecting rod 30, thereby improving the efficiency and service life of the pump. A fixing sleeve 26 is provided on the side of the connecting rod 30 adjacent to the boosting diaphragm 28, which is connected to the middle part of the boosting diaphragm 28 by a fixing screw 29 to ensure the stability and reliability of the transmission. When the driving motor 01 is started, the output shaft 33 drives the eccentric seat 32 to rotate, and drives the boosting diaphragm 28 to reciprocate through the connecting rod 30 and the fixed sleeve 26. When the boosting diaphragm 28 moves toward the boosting chamber 22, the volume of the boosting chamber 22 decreases, the pressure increases, the water inlet one-way valve flap 20 opens, and the liquid is sucked into the boosting chamber 22 from the water inlet 16; the water outlet one-way valve flap 23 is closed to prevent the liquid from flowing back; when the boosting diaphragm 28 moves toward the water outlet chamber 13, the volume of the boosting chamber 22 increases, the pressure decreases, the water inlet one-way valve flap 20 is closed, and the liquid continues to enter; the water outlet one-way valve flap 23 opens, and the liquid is pushed from the boosting chamber 22 into the water outlet chamber 13 and discharged through the water outlet 03. Through the design of the exhaust pressure relief port 02 and the pressure relief component, the pump can effectively discharge the air in the system or reduce the excessive water pressure, thereby ensuring the stability and safety of the pump.

[0038] Furthermore, a top cover 27 is provided on the top of the housing 08 , a second bearing 25 is embedded in the bottom surface of the top cover 27 , and the upper end of the output shaft 33 is connected to the inner ring of the second bearing 25 .

[0039] Specifically, Figure 1 As shown, a second bearing 25 is fixed to the middle of the bottom surface of the top cover 27, and the upper end of the output shaft 33 is fixedly connected to the inner ring of the second bearing 25. The output shaft 33 has better stability during rotation and is less likely to shake.

[0040] The above is only a preferred embodiment of the utility model and does not limit the utility model in any form. According to the technical essence of the utility model, within the spirit and principles of the utility model, any simple modification, equivalent replacement and improvement made to the above embodiment still falls within the protection scope of the technical solution of the utility model.

Claims

1. An exhaust pressure relief diaphragm pump, comprising a pump head body (15), the pump head body (15) being provided with a water inlet (16) and a water outlet (03), the pump head body (15) being provided with a water outlet chamber (13) and a boost chamber (22), the water outlet chamber (13) being connected to the water outlet (03), the boost chamber (22) being connected to the water inlet (16) and the water outlet chamber (13) respectively through a one-way water flow control structure, characterized in that: The pump head body (15) is also provided with an exhaust and pressure relief port (02), and a pressure relief component for exhausting air and relieving pressure is provided on the water path connected to the exhaust and pressure relief port (02) and the water outlet chamber (13). When the diaphragm pump is started, the pressure relief component moves laterally to discharge the air in the water inlet pipe and the air that has entered the diaphragm pump; when the diaphragm pump is stopped, the pressure relief component moves laterally to reduce the water pressure in the water outlet chamber (13).

2. An exhaust pressure relief diaphragm pump according to claim 1, characterized in that: A pump cover (11) is provided at one end of the pump head body (15), and an air hole (09) connected to the atmosphere is provided on the pump cover (11). The pressure relief assembly comprises a control rod (07) and an elastic body (10). The control rod (07) and the inner wall of the pump head body (15) can slide relative to each other. One end of the elastic body (10) acts on the pump cover (11), and the other end acts on the control rod (07). A positioning sleeve (06) is provided in the pump head body (15), and one end of the control rod (07) is slidably arranged in the positioning sleeve (06). The inner wall of the positioning sleeve (06) is provided with a flow limiting groove (05) connected to the exhaust pressure relief port (02).

3. An exhaust pressure relief diaphragm pump according to claim 2, characterized in that: The control rod (07) is embedded with a first sealing ring (04) located in the positioning sleeve (06).

4. The exhaust pressure relief diaphragm pump according to claim 2, characterized in that: The elastic body (10) is a return spring, one end of which acts on the inner wall of the pump cover (11), and the other end of which acts on the left end of the control rod (07).

5. The exhaust pressure relief diaphragm pump according to claim 2, characterized in that: A second sealing ring (12) located outside the positioning sleeve (06) is embedded in the control rod (07), and the second sealing ring (12) is pressed tightly between the control rod (07) and the inner wall of the pump head body (15).

6. The exhaust pressure relief diaphragm pump according to claim 1, characterized in that: The pump head body (15) is provided with a water hole (14) connected to the water outlet cavity (13).

7. The exhaust pressure relief diaphragm pump according to claim 1, characterized in that: The invention also comprises a driving motor (01), wherein a middle plate (18) is provided between the outer shell (08) of the driving motor (01) and the pump head body (15), a third sealing ring (17) is provided between one side of the middle plate (18) and the pump head body (15), a boosting diaphragm (28) is pressed between the other side of the middle plate (18) and the outer shell (08), a boosting chamber (22) is formed between the boosting diaphragm (28) and the middle plate (18), a water inlet hole (21) and a water outlet hole (24) connected to the boosting chamber (22) are provided on the middle plate (18), and a one-way water flow control structure is provided on the middle plate (18).

8. The exhaust pressure relief diaphragm pump according to claim 7, characterized in that: The one-way water flow control structure comprises a water inlet one-way valve flap (20) and a water outlet one-way valve flap (23); the water inlet one-way valve flap (20) is fixed on the middle plate (18) and covers the water inlet hole (21); and the water outlet one-way valve flap (23) is fixed on the middle plate (18) and covers the water outlet hole (24).

9. The exhaust pressure relief diaphragm pump according to claim 7, characterized in that: The output shaft (33) of the driving motor (01) is arranged upward, and an eccentric seat (32) is eccentrically connected to the output shaft (33). A first bearing (31) is sleeved on the outer side of the eccentric seat (32), and a connecting rod (30) is sleeved on the outer side of the first bearing (31). A fixing sleeve (26) is provided on the side of the connecting rod adjacent to the boost diaphragm (28), and the fixing sleeve (26) is connected to the middle part of the boost diaphragm (28) via a fixing screw (29).

10. The exhaust pressure relief diaphragm pump according to claim 7, characterized in that: A top cover (27) is provided on the top of the housing (08), a second bearing (25) is embedded in the bottom surface of the top cover (27), and the upper end of the output shaft (33) is connected to the inner ring of the second bearing (25).

Images