Diaphragm pump pressure relief end cover and pressure relief pump thereof

Abstract

The utility model relates to the field of diaphragm pumps, in particular to a diaphragm pump pressure relief end cover and a pressure relief pump thereof, which comprise a cover body and a pressure relief module, the cover body is provided with a water inlet pipe and a water outlet pipe, a pressure relief channel is arranged in the pressure relief module, and the pressure relief channel is provided with a pressure relief water inlet communicated with the water outlet pipe. Meanwhile, a pressure relief water outlet communicated with the water inlet pipe is also formed; when the water pressure of the pressure relief water inlet is larger than a preset value, the pressure relief valve is opened, so that liquid in the water outlet pipe flows into the pressure relief channel and flows back to the water inlet pipe through the pressure relief water outlet. According to the scheme, the pressure in the pump cavity is monitored in real time through the internal pressure relief valve body, and once the pressure exceeds a preset threshold value, the pressure relief valve body can be quickly responded and opened for pressure relief, so that damage to a pipeline caused by overlarge pressure is effectively avoided, and meanwhile, a transmission system and a motor in the pump cavity can be effectively protected.

Description

Technical Field

[0001] The utility model relates to the field of diaphragm pumps, in particular to a diaphragm pump pressure relief end cover and a pressure relief pump thereof. Background Art

[0002] The diaphragm pump is a type of pump widely used in the chemical, pharmaceutical, food and other industries. Its working principle mainly relies on the back and forth movement of the diaphragm (i.e., piston), thereby changing the volume of the pump chamber to achieve the purpose of pumping liquid.

[0003] After investigating and studying diaphragm pumps on the market, we found that their water pressure is generally maintained at around 300Kpa. However, this water pressure value lacks sufficient pressure relief mechanism. When the pipeline system encounters pressure overload or abnormal conditions (such as blockage of the terminal product), the sudden increase in pressure will pose a threat to the pump cavity and its pipeline. In extreme cases, it may even cause damage to the pipeline system, posing a serious threat to the stable operation of the entire equipment. In addition, the increase in pressure in the pump cavity will also react on the transmission system and motor, resulting in an increase in motor load, thereby shortening the service life of the motor.

[0004] Therefore, the research and improvement of the water pressure management and pressure relief mechanism of the diaphragm pump are particularly important. Therefore, the utility model author is committed to designing a diaphragm pump pressure relief end cover and a pressure relief pump thereof to solve the above problems. Utility Model Content

[0005] In order to solve the above problems, the utility model provides a diaphragm pump pressure relief end cover and a pressure relief pump thereof, wherein an internal flow channel circulation is formed inside the pump. When the pressure in the pump chamber is too high, the pressure relief valve at the outlet is opened, and the leaked medium flows back to the inlet.

[0006] To achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a diaphragm pump pressure relief end cover, including a cover body and a pressure relief module, the cover body is provided with a water inlet pipe and a water outlet pipe, the pressure relief module is provided with a pressure relief channel, wherein the pressure relief channel is provided with a pressure relief water inlet connected to the water outlet pipe, and is also provided with a pressure relief water outlet connected to the water inlet pipe; a pressure relief valve body is provided in the pressure relief channel, when the water pressure at the pressure relief water inlet is greater than a preset value, the pressure relief valve body opens to allow the liquid in the outlet pipe to flow into the pressure relief channel, and flow back to the water inlet pipe through the pressure relief water outlet.

[0007] Furthermore, it includes a first pressure relief cover and a first pressure relief part integrally formed with the cover body, the pressure relief valve body includes a valve membrane and a spring, the valve membrane is provided with a control valve body, wherein the pressure relief water inlet and the pressure relief water outlet are both opened on the first pressure relief part, the valve membrane covers the surface of the first pressure relief part, the first pressure relief cover covers the surface of the first pressure relief part, and the valve membrane is arranged between the first pressure relief cover and the first pressure relief part; and the control valve body is pressed at the pressure relief water inlet by the spring.

[0008] Furthermore, a plurality of pressure relief grooves are provided on the surface of the first pressure relief portion.

[0009] Furthermore, a plurality of positioning protrusions are provided on the surface of the first pressure relief portion, and a plurality of positioning holes aligned with the positioning protrusions are opened on the surface of the valve membrane.

[0010] Furthermore, the first pressure relief cover is provided with a spring placement groove for placing a spring, wherein the spring in a compressed state is placed in the spring placement groove and presses the control valve body against the pressure relief water inlet.

[0011] Furthermore, a plurality of mounting posts are protruding from the surface of the first pressure relief cover close to the first pressure relief portion, and a plurality of mounting grooves are opened on the surface of the first pressure relief portion, and the mounting posts are mounted with the corresponding mounting grooves to realize the connection between the two.

[0012] Furthermore, screw holes are provided on the surfaces of the first pressure relief cover and the first pressure relief portion, and the connection between the two is achieved by screws passing through corresponding screw holes.

[0013] Furthermore, a first pressure relief channel is formed between the valve membrane and the first pressure relief portion, a second pressure relief channel is formed between the valve membrane and the first pressure relief cover, and the first pressure relief channel and the second pressure relief channel form a pressure relief channel.

[0014] The present application also provides a pressure relief pump, comprising a pump body and the diaphragm pump pressure relief end cover, the pump body comprising a negative pressure generating mechanism, a valve sheet and a valve plate, the valve sheet is installed in the valve plate to form a valve, the negative pressure generating mechanism is assembled with the bottom of the diaphragm pump pressure relief end cover through the valve, the bottom of the diaphragm pump pressure relief end cover is provided with a water inlet cavity connected to the water inlet side of the valve, and a water outlet cavity connected to the water outlet side of the valve, and the water inlet cavity is connected to the water inlet pipe, and the water outlet cavity is connected to the water outlet pipe.

[0015] Furthermore, the negative pressure generating mechanism includes a driving mechanism, a leather cup, and an umbrella tack. The driving mechanism is connected to the leather cup and is used to drive the leather cup to move. The stretching of the leather cup drives the umbrella tack to open, and the compression of the leather cup drives the umbrella tack to close, so that negative pressure is generated by the movement of the leather cup; the stretching of the leather cup drives the umbrella tack to open and close the valve plate; the compression of the leather cup drives the umbrella tack to close and open the valve plate; the driving mechanism includes a motor, an eccentric wheel, and a swing frame. The leather cup is installed on the swing frame, the motor is connected to the eccentric wheel, the motor is used to drive the eccentric wheel to rotate, the eccentric wheel is connected to the swing frame, and the eccentric wheel is used to drive the swing frame and the leather cup to reciprocate up and down.

[0016] The beneficial effect of the utility model is that the scheme monitors the pressure in the pump chamber in real time through the internal pressure relief valve body. Once it exceeds the preset threshold, it can respond quickly and open the pressure relief valve body to release the pressure, thereby effectively avoiding damage to the pipeline and the pump chamber due to excessive pressure, and can also effectively protect the transmission system and motor inside the pump chamber. At the same time, the outflowing medium directly flows back to the inlet, reducing the waste of the medium and meeting the requirements of energy conservation and environmental protection. In addition, in the present application, the pressure relief valve body and the reflux channel are integrated in the cover body, so that the entire system structure is compact and occupies a small space, which is suitable for various occasions with limited space. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the pressure relief pump.

[0018] Figure 2 It is a structural diagram of the pressure relief end cover of the diaphragm pump.

[0019] Figure 3 It is a schematic diagram of the structure of the diaphragm pump pressure relief end cover after omitting the first pressure relief cover.

[0020] Figure 4 It is a schematic diagram of the structure of the diaphragm pump pressure relief end cover omitting the first pressure relief cover and the valve diaphragm.

[0021] Figure 5 It is a structural schematic diagram of the valve diaphragm.

[0022] Figure 6 It is a structural schematic diagram of the first pressure relief cover.

[0023] Figure 7 It is a structural schematic diagram of the first pressure relief cover.

[0024] Figure 8 It is a structural schematic diagram of the pressure relief pump cross section.

[0025] Explanation of the accompanying drawings: 1. Cover body; 2. Pressure relief module; 100. Pump body; 11. Water inlet pipe; 12. Water outlet pipe; 13. First pressure relief part; 131. Mounting groove; 132. Pressure relief groove position; 133. Positioning protrusion; 134. Pressure relief water outlet; 135. Pressure relief water inlet; 14. First pressure relief cover; 141. Screw hole; 142. Spring placement groove; 143. Mounting column; 15. Screw; 16. Valve membrane; 161. Control valve body; 163. Positioning hole; 17. Spring; 101. Motor; 102. Eccentric wheel; 103. Swing frame; 104. Leather cup; 105. Valve plate; 106. Valve plate; 107. Check spring; 108. Leak-proof diaphragm. DETAILED DESCRIPTION

[0026] See also Figure 1-8As shown, the present invention specifically explains the implementation mode of the present invention in combination with the accompanying drawings below. The accompanying drawings are for reference and illustration only and do not constitute a limitation on the scope of patent protection of the present invention.

[0027] A diaphragm pump pressure relief end cover comprises a cover body 1 and a pressure relief module 2, wherein the cover body 1 is provided with an inlet pipe 11 and an outlet pipe 12, and a pressure relief channel is provided in the pressure relief module 2, wherein the pressure relief channel is provided with a pressure relief water inlet 135 connected to the outlet pipe 12, and is also provided with a pressure relief water outlet 134 connected to the inlet pipe 11; a pressure relief valve body is provided in the pressure relief channel, and when the water pressure at the pressure relief water inlet 135 is greater than a preset value, the pressure relief valve body opens to allow the liquid in the outlet pipe 12 to flow into the pressure relief channel and flow back to the inlet pipe 11 through the pressure relief water outlet 134.

[0028] This solution monitors the pressure in the pump chamber in real time through the internal pressure relief valve body. Once it exceeds the preset threshold, it can respond quickly and open the pressure relief valve body to release the pressure, thereby effectively avoiding damage to the pipeline caused by excessive pressure. At the same time, the outflowing medium directly flows back to the inlet, reducing the waste of the medium and meeting the requirements of energy conservation and environmental protection. In addition, in this application, the pressure relief valve body and the reflux channel are integrated in the cover body 1, making the entire system compact and occupying a small space, suitable for various occasions with limited space.

[0029] Furthermore, it includes a first pressure relief cover 14 and a first pressure relief part 13 integrally formed with the cover body 1, the pressure relief valve body includes a valve membrane 16 and a spring 17, the valve membrane 16 is provided with a control valve body 161, wherein the pressure relief water inlet 135 and the pressure relief water outlet 134 are both opened on the first pressure relief part 13, the valve membrane 16 covers the surface of the first pressure relief part 13, the first pressure relief cover 14 covers the surface of the first pressure relief part 13, and the valve membrane 16 is arranged between the first pressure relief cover 14 and the first pressure relief part 13; and the control valve body 161 is pressed at the pressure relief water inlet 135 by the spring 17.

[0030] The first pressure relief cover 14 and the first pressure relief part 13 integrally formed with the cover body 1 together constitute a compact and stable pressure relief module 2. This design not only enhances the overall structural strength of the end cover, but also makes the entire module easier to install and maintain. The valve membrane 16 covers the surface of the first pressure relief part 13, and the first pressure relief cover 14 covers the surface of the first pressure relief part 13 to form a closed space. This design ensures that the valve membrane 16 can work stably and effectively prevents medium leakage. The control valve body 161 is pressed at the pressure relief water inlet 135 by the spring 17. This design enables the valve membrane 16 to fit tightly at the pressure relief water inlet 135 under normal working conditions to prevent medium leakage. When the pressure in the pump chamber exceeds the preset value, the liquid pressure will overcome the elastic force of the spring 17, push the control valve body 161 to move, and then open the control valve body 161 to achieve rapid pressure relief. This design ensures the rapidity and stability of the pressure relief process and effectively protects the pump body 100 and the transmission structure.

[0031] The manufacturer can easily adjust the preset pressure value of the pressure relief by adjusting the elastic force of the spring 17. This adjustment mechanism enables the end cover to adapt to the needs of different working scenarios, improving the adaptability and flexibility of the pump. Since key components such as the valve diaphragm 16, the control valve body 161 and the spring 17 are all located in the closed space between the first pressure relief cover 14 and the first pressure relief part 13, this design makes these components easy to inspect and replace, reducing maintenance costs.

[0032] Furthermore, the surface of the first pressure relief portion 13 is also provided with a plurality of pressure relief grooves 132. One of the main functions of the pressure relief groove is to improve the pressure relief efficiency. When the liquid enters the pressure relief channel, it passes through a plurality of pressure relief grooves, which can effectively reduce the water pressure, thereby achieving a faster and more uniform pressure relief process. Specifically, when the pressure in the pump chamber exceeds the preset value, the valve membrane 16 opens, and the high-pressure liquid first enters the pressure relief channel. Subsequently, the liquid passes through a plurality of carefully designed pressure relief grooves, and each groove can reduce the pressure of the liquid to a certain extent. In this way, the pressure of the liquid is gradually dispersed and reduced in the process of passing through a plurality of grooves, thereby achieving a more efficient pressure relief. This design not only improves the pressure relief efficiency, but also ensures the stability of the liquid during the pressure relief process. Since the pressure is evenly dispersed, potential risks caused by local high pressure, such as component damage or leakage, are avoided. At the same time, the design of multiple pressure relief grooves also enhances the structural stability of the end cover, making it more durable under high pressure environments.

[0033] Furthermore, a plurality of positioning protrusions 133 are provided on the surface of the first pressure relief portion 13 , and a plurality of positioning holes 163 aligned with the positioning protrusions 133 are opened on the surface of the valve membrane 16 .

[0034] The design of the positioning protrusion 133 and the positioning hole 163 ensures that the valve diaphragm 16 can be accurately and quickly positioned to the correct position of the first pressure relief portion 13 during the installation process. This not only simplifies the installation process and improves the installation efficiency, but also ensures the precise fit between the valve diaphragm 16 and the first pressure relief portion 13, avoiding leakage or performance degradation caused by improper installation. At the same time, through the close fit between the positioning protrusion 133 and the positioning hole 163, the valve diaphragm 16 can maintain a stable position during operation and is not prone to displacement or shaking. This ensures that the valve diaphragm 16 can work reliably in a high-pressure environment and effectively prevents pressure leakage or control failure caused by the movement of the valve diaphragm 16.

[0035] Furthermore, the first pressure relief cover 14 is provided with a spring placement groove 142 for placing the spring 17 , wherein the spring 17 in a compressed state is placed in the spring placement groove 142 and presses the control valve body 161 against the pressure relief water inlet 135 .

[0036] By providing a special spring placement groove 142 on the first pressure relief cover 14, it can be ensured that the spring 17 is in the correct position during the installation process to prevent the spring 17 from shifting or falling off. This stable positioning mechanism ensures that the spring 17 can continuously and stably provide elastic force, ensuring that the control valve body 161 fits tightly against the pressure relief water inlet 135 to prevent medium leakage. The design of the spring placement groove 142 makes the entire end cover structure more compact and effectively utilizes limited space. This optimization not only reduces the volume and weight of the end cover, but also improves its structural strength and stability.

[0037] The spring placement groove 142 makes the installation and replacement of the spring 17 easier and more convenient. When the spring 17 needs to be maintained or replaced, it is only necessary to open the first pressure relief cover 14, take out the old spring 17, and then put the new compression spring 17 into the spring placement groove 142. This design reduces the difficulty and cost of maintenance and improves work efficiency.

[0038] By providing the spring placement groove 142 of a specific shape, the compression amount of the spring 17 can be precisely controlled. This ensures that the spring 17 can provide a constant elastic force during operation and maintain a stable position of the control valve body 161. This precise compression amount control helps to improve the accuracy and reliability of pressure relief.

[0039] Furthermore, a plurality of mounting posts 143 are protruding from the surface of the first pressure relief cover 14 close to the first pressure relief portion 13 , and a plurality of mounting grooves 131 are opened on the surface of the first pressure relief portion 13 , and the mounting posts 143 are mounted with the corresponding mounting grooves 131 to achieve connection between the two.

[0040] In the design of the diaphragm pump pressure relief end cover, a number of protruding fitting columns 143 are further provided on the first pressure relief cover 14, and fitting grooves 131 corresponding to these fitting columns 143 are provided on the surface of the first pressure relief part 13. This design realizes the connection between the first pressure relief cover 14 and the first pressure relief part 13 by fitting the fitting columns 143 and the fitting grooves 131, which brings the following significant advantages: the design of the fitting columns 143 and the fitting grooves 131 ensures the precise positioning of the first pressure relief cover 14 and the first pressure relief part 13 during the assembly process. Each fitting column 143 can be accurately inserted into the corresponding fitting groove 131, thereby realizing a stable connection between the two. This precise positioning mechanism avoids deviation or leakage problems caused by improper assembly. Through the fitting of the fitting columns 143 and the fitting grooves 131, the assembly process of the first pressure relief cover 14 and the first pressure relief part 13 becomes simple and quick. The operator only needs to align the fitting column 143 with the fitting groove 131 and then press lightly to realize the connection between the two. This design reduces assembly difficulty and time cost and improves production efficiency.

[0041] Furthermore, screw holes 141 are provided on the surfaces of the first pressure relief cover 14 and the first pressure relief portion 13 , and the connection between the two is achieved by passing the screws 15 through the corresponding screw holes 141 .

[0042] In the design of the diaphragm pump pressure relief cover, screw holes 141 are further provided on the surfaces of the first pressure relief cover 14 and the first pressure relief portion 13, and the two are connected by passing the screws 15 through the corresponding screw holes 141. This design brings the following significant advantages:

[0043] Using screws 15 to connect the first pressure relief cover 14 and the first pressure relief part 13 can ensure that the connection between the two is very stable. Screws 15 can provide a strong fastening force, effectively preventing loosening or falling off in a high-pressure working environment. This stable connection ensures the sealing of the end cover and the pressure relief part and prevents leakage of the medium. The design of the screw 15 connection makes the installation and disassembly of the first pressure relief cover 14 and the first pressure relief part 13 relatively simple. By tightening or loosening the screws 15, the connection or separation of the two can be easily achieved. This design reduces the difficulty of installation and maintenance and improves work efficiency.

[0044] Furthermore, a first pressure relief channel is formed between the valve film 16 and the first pressure relief portion 13 , a second pressure relief channel is formed between the valve film 16 and the first pressure relief cover 14 , and the first pressure relief channel and the second pressure relief channel form a pressure relief channel.

[0045] In the design of the diaphragm pump, by designing the first pressure relief channel between the valve membrane 16 and the first pressure relief part 13, and designing the second pressure relief channel between the valve membrane 16 and the first pressure relief cover 14, and making the first pressure relief channel and the second pressure relief channel together constitute the main pressure relief channel, this structural design brings many significant advantages.

[0046] First, when the water pressure of the water outlet pipe 12 is too high, the valve body will be pushed to move away from the pressure relief water inlet 135, and the spring 17 will be compressed at the same time. In this process, the liquid in the water outlet pipe 12 can smoothly enter the pressure relief channel for pressure relief. Such a design ensures that the liquid can be quickly and effectively depressurized under high pressure, and prevents equipment damage or performance degradation caused by excessive pressure. Secondly, by setting the first pressure relief channel and the second pressure relief channel, multiple pressure relief effects on the liquid are achieved. Generally, the liquid mainly enters the second pressure relief channel for preliminary pressure relief. As the pressure continues to increase, the water flow will push the valve membrane 16 outward, increase the area of ​​the first pressure relief channel, and allow more liquid to enter for further pressure relief. This graded pressure relief design can more effectively reduce the pressure of the liquid and improve the pressure relief efficiency. In addition, a plurality of pressure relief slots 132 are provided in the first pressure relief channel, which can further enhance the pressure relief effect. These pressure relief slots 132 can increase the flow area of ​​the liquid, reduce the flow rate of the liquid in the channel, and thus reduce the pressure. After multiple pressure reliefs, the liquid can return to the water inlet pipe 11 through the pressure relief outlet 134 to achieve pressure balance and regulation.

[0047] The present application also provides a pressure relief pump, including a pump body 100 and the above-mentioned diaphragm pump pressure relief end cover, the pump body 100 includes a negative pressure generating mechanism, a valve sheet 105 and a valve plate 106, the valve sheet 105 is installed in the valve plate 106 to form a valve, the negative pressure generating mechanism is assembled with the bottom of the diaphragm pump pressure relief end cover through the valve, and the bottom of the diaphragm pump pressure relief end cover is provided with a water inlet cavity connected to the water inlet side of the valve and a water outlet cavity connected to the water outlet side of the valve, and the water inlet cavity is connected to the water inlet pipe 11, and the water outlet cavity is connected to the water outlet pipe 12.

[0048] Furthermore, a check spring 107 and a leak-proof diaphragm 108 are provided at the water outlet cavity. Generally, the water outlet cavity overcomes the check spring 107 and the leak-proof diaphragm 108 through the normal water outlet pressure, and then the internal liquid can enter the water outlet pipe 12 through the water outlet cavity. First, the existence of the check spring 107 provides a reverse resistance for the water outlet cavity. Under normal working conditions, the water outlet cavity can overcome the resistance of the check spring 107 through the normal water outlet pressure, so that the internal liquid can smoothly enter the water outlet pipe 12. However, when the water outlet pressure decreases or disappears, the check spring 107 will play a role, closing the channel of the water outlet cavity to prevent the liquid from flowing back into the water outlet cavity. This design ensures the unidirectional flow of liquid and avoids equipment damage or performance degradation that may be caused by backflow.

[0049] Further, the negative pressure generating mechanism includes a driving mechanism, a leather cup 104, and an umbrella tack. The driving mechanism is connected to the leather cup 104, and the driving mechanism is used to drive the leather cup 104 to move. The stretching of the leather cup 104 drives the umbrella tack to open, and the compression of the leather cup 104 drives the umbrella tack to close, and negative pressure is generated by the movement of the leather cup 104; the stretching of the leather cup 104 drives the umbrella tack to open and close the valve plate 105; the compression of the leather cup 104 drives the umbrella tack to close and open the valve plate 105; the driving mechanism includes a motor 101, an eccentric wheel 102, and a swing frame 103. The leather cup 104 is installed on the swing frame 103, the motor 101 is connected to the eccentric wheel 102, the motor 101 is used to drive the eccentric wheel 102 to rotate, the eccentric wheel 102 is connected to the swing frame 103, and the eccentric wheel 102 is used to drive the swing frame 103 and the leather cup 104 to reciprocate up and down.

[0050] The above implementation modes are merely descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary engineering and technical personnel in the field shall fall within the protection scope determined by the claims of the present invention.

Claims

1. A diaphragm pump pressure relief end cover, characterized in that: The invention comprises a cover body and a pressure relief module, wherein the cover body is provided with an inlet pipe and an outlet pipe, and a pressure relief channel is provided in the pressure relief module, wherein the pressure relief channel is provided with a pressure relief inlet connected with the outlet pipe, and a pressure relief outlet connected with the inlet pipe is also provided; a pressure relief valve body is provided in the pressure relief channel, and when the water pressure at the pressure relief inlet is greater than a preset value, the pressure relief valve body opens to allow the liquid in the outlet pipe to flow into the pressure relief channel and flow back to the inlet pipe through the pressure relief outlet; the pressure relief module comprises a first pressure relief cover and a first pressure relief part integrally formed with the cover body, the pressure relief valve body comprises a valve membrane and a spring, the valve membrane is provided with a control valve body, wherein the pressure relief inlet and the pressure relief outlet are both opened on the first pressure relief part, the valve membrane covers the surface of the first pressure relief part, the first pressure relief cover covers the surface of the first pressure relief part, and the valve membrane is provided between the first pressure relief cover and the first pressure relief part; and the control valve body is pressed at the pressure relief inlet by a spring.

2. A diaphragm pump pressure relief end cover according to claim 1, characterized in that: A plurality of pressure relief grooves are also arranged on the surface of the first pressure relief portion.

3. The diaphragm pump pressure relief end cover according to claim 1, characterized in that: The surface of the first pressure relief portion is also provided with a plurality of positioning protrusions, and the surface of the valve membrane is provided with a plurality of positioning holes aligned with the positioning protrusions.

4. A diaphragm pump pressure relief end cover according to claim 3, characterized in that: The first pressure relief cover is provided with a spring placement groove for placing a spring, wherein the spring in a compressed state is placed in the spring placement groove and presses the control valve body tightly against the pressure relief water inlet.

5. The diaphragm pump pressure relief end cover according to claim 1, characterized in that: A plurality of mounting posts are protruding from the surface of the first pressure relief cover close to the first pressure relief portion, and a plurality of mounting grooves are opened on the surface of the first pressure relief portion, and the mounting posts are mounted with the corresponding mounting grooves to realize the connection between the two.

6. The diaphragm pump pressure relief end cover according to claim 1, characterized in that: The surfaces of the first pressure relief cover and the first pressure relief portion are both provided with screw holes, and the connection between the two is achieved by screws passing through corresponding screw holes.

7. The diaphragm pump pressure relief end cover according to claim 1, characterized in that: A first pressure relief channel is formed between the valve film and the first pressure relief portion, a second pressure relief channel is formed between the valve film and the first pressure relief cover, and the first pressure relief channel and the second pressure relief channel form a pressure relief channel.

8. A pressure relief pump, characterized in that: It comprises a pump body and a diaphragm pump pressure relief end cover as described in any one of claims 1 to 7, the pump body is provided with a negative pressure generating mechanism, a valve sheet and a valve plate, the valve sheet is installed in the valve plate to form a valve, the negative pressure generating mechanism is assembled with the bottom of the diaphragm pump pressure relief end cover through the valve, the bottom of the diaphragm pump pressure relief end cover is provided with a water inlet cavity connected to the water inlet side of the valve, a water outlet cavity connected to the water outlet side of the valve, and the water inlet cavity is connected to the water inlet pipe, and the water outlet cavity is connected to the water outlet pipe.

9. A pressure relief pump according to claim 8, characterized in that: The negative pressure generating mechanism includes a driving mechanism, a leather cup, and an umbrella tack. The driving mechanism is connected to the leather cup and is used to drive the leather cup to move. The stretching of the leather cup drives the umbrella tack to open, and the compression of the leather cup drives the umbrella tack to close, and negative pressure is generated by the movement of the leather cup. The stretching of the leather cup drives the umbrella tack to open and close the valve plate; the compression of the leather cup drives the umbrella tack to close and open the valve plate. The driving mechanism includes a motor, an eccentric wheel, and a swing frame. The leather cup is installed on the swing frame. The motor is connected to the eccentric wheel. The motor is used to drive the eccentric wheel to rotate. The eccentric wheel is connected to the swing frame, and the eccentric wheel is used to drive the swing frame and the leather cup to reciprocate up and down.

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