Plunger pump diaphragm leak detection device

Abstract

The utility model provides a plunger pump diaphragm leak detection device, which comprises an inlet plugging device, an outlet plugging device and a gas suction device, and is characterized in that the inlet plugging device is provided with an inflation interface; the gas suction device comprises a gas suction pump, a first pipeline, a buffer bottle, a second pipeline and a gas suction connector, a first insertion pipe and a second insertion pipe are arranged at the top of the buffer bottle, the bottom end of the first insertion pipe just extends into the buffer bottle, the bottom end of the second insertion pipe is arranged close to the bottle bottom of the buffer bottle, and the gas suction connector is connected with the gas suction pump. The two ends of the first pipeline are communicated with an air extraction opening of the air extraction pump and the top end of the first insertion pipe respectively, the two ends of the second pipeline are communicated with the top end of the second insertion pipe and the air extraction connector respectively, and the air extraction connector is used for being communicated with an air extraction connector in a plunger pump. The plunger pump diaphragm leak detection device has the advantages of being scientific in design, convenient to maintain and high in practicability, and lubricating oil in a plunger pump is not prone to entering a gas suction device.

Description

Technical Field

[0001] The utility model relates to the field of plunger pumps, in particular to a plunger pump diaphragm leak detection device. Background Art

[0002] A reciprocating high-pressure plunger pump consists of a power end and a hydraulic end. The power end mainly converts the rotational motion of the drive shaft into the reciprocating motion of the plunger, while the hydraulic end connected to the plunger mainly realizes medium transportation through the reciprocating motion of the plunger and the opening and closing of the valve. The plunger motion of traditional plunger pumps mostly uses packing or oil seals. After long-term use, the packing is prone to wear, resulting in leakage.

[0003] The patent with application number 202022716241.X discloses a plunger pump diaphragm leak detection device and a plunger pump equipped with the device. The device sets a sealing plate at the inlet and outlet of the plunger pump, fills the pump with nitrogen, and then quickly evacuates the gas through a gas suction device. After the diaphragm reaches the set pressure, the sealing of the diaphragm is evaluated by the pressure holding condition. In this patent, a filter device is provided to filter the lubricating oil sucked from the plunger pump to prevent the lubricating oil from damaging the gas suction device. However, the filter device is easily clogged during use. Once clogged, the filter device needs to be disassembled for cleaning and maintenance, which is very troublesome and affects use.

[0004] In order to solve the above problems, people have been seeking an ideal technical solution. Summary of the invention

[0005] The utility model aims to solve the deficiencies of the prior art and thus provide a plunger pump diaphragm leak detection device which has scientific design, is easy to maintain and has strong practicability and prevents lubricating oil in the plunger pump from entering the gas suction device.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a plunger pump diaphragm leak detection device, including an inlet blocking device, an outlet blocking device and a gas suction device, the inlet blocking device is used to block the inlet of the plunger pump, the inlet blocking device is provided with an inflation interface, and the outlet blocking device is used to block the outlet of the plunger pump; the gas suction device includes an air pump, a first pipeline, a buffer bottle, a second pipeline and an air suction joint, the top of the buffer bottle is provided with a first cannula and a second cannula, the bottom end of the first cannula just extends into the buffer bottle, the bottom end of the second cannula is arranged close to the bottom of the buffer bottle, the two ends of the first pipeline are respectively connected to the air suction port of the air pump and the top end of the first cannula, the two ends of the second pipeline are respectively connected to the top end of the second cannula and the air suction joint, and the air suction joint is used to connect the air suction interface on the plunger pump.

[0007] Based on the above, the buffer bottle includes a bottle body and a bottle cap, the top of the bottle body is provided with a bottle mouth, the bottle cap is connected to the bottle mouth by threads, a sealing gasket is provided on the inner side of the bottle cap corresponding to the end face of the bottle mouth, and the first insert tube and the second insert tube are both provided on the bottle cap.

[0008] Based on the above, a strip-shaped window extending in the axial direction is arranged on the bottle body.

[0009] Based on the above, a one-way valve is provided on the first pipeline.

[0010] Based on the above, a pressure sensor is provided on the second pipeline.

[0011] The utility model has substantial characteristics and progress compared with the prior art. Specifically, the utility model can fill the buffer bottle with a solution that can dissolve lubricating oil, such as ethanol or an aqueous solution with detergent added, etc. The solution should cover the bottom end of the second cannula and remain a distance from the bottom end of the first cannula. When the vacuum pump is pumping air, the lubricating oil sucked out of the plunger pump will dissolve in the solution as it passes through, thereby avoiding entering the vacuum pump and causing damage; the bottle cap is threadedly connected to the bottle mouth, which is convenient for disassembly and replacement of the solution; the strip window is convenient for observing the liquid level of the solution in the bottle; the one-way valve is arranged on the first pipeline to avoid gas being sucked back into the buffer bottle; the pressure sensor is used to monitor the changes in air pressure in the plunger pump, and then evaluate the sealing condition of the diaphragm; it has the advantages of scientific design, the lubricating oil in the plunger pump is not easy to enter the gas suction device, convenient maintenance, and strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 The utility model is a structural schematic diagram of a diaphragm leak detection device for a plunger pump.

[0013] Figure 2 It is a structural schematic diagram of the buffer bottle in the utility model.

[0014] In the figure: 1. inlet plugging device; 2. outlet plugging device; 3. plunger pump; 4. charging interface; 5. vacuum pump; 6. first pipeline; 7. buffer bottle; 8. second pipeline; 9. vacuum joint; 10. one-way valve; 11. pressure sensor; 31. vacuum interface; 71. bottle body; 72. bottle cap; 73. bottle mouth; 74. sealing gasket; 75. first cannula; 76. second cannula; 77. strip window. DETAILED DESCRIPTION

[0015] The technical solution of the utility model is further described in detail below through specific implementation methods.

[0016] like Figure 1and Figure 2 As shown, a plunger pump diaphragm leak detection device includes an inlet blocking device 1, an outlet blocking device 2 and a gas suction device, wherein the inlet blocking device 1 is used to block the inlet of the plunger pump 3, and the outlet blocking device 2 is used to block the outlet of the plunger pump 3. The inlet blocking device 1 is provided with an inflation interface 4, which is used to fill nitrogen into the plunger pump 3 so that the two diaphragms in the plunger pump 3 fit together. The inlet blocking device 1 and the outlet blocking device 2 can specifically adopt a sealing plate, which can be manually operated or electrically controlled.

[0017] The gas suction device specifically includes an air pump 5, a first pipeline 6, a buffer bottle 7, a second pipeline 8, an air suction joint 9, a one-way valve 10 and a pressure sensor 11. The buffer bottle 7 includes a bottle body 71 and a bottle cap 72. The top of the bottle body 71 is provided with a bottle mouth 73. The bottle cap 72 is connected to the bottle mouth 73 by threads for easy opening. The inner side of the bottle cap 72 is provided with a sealing gasket 74 corresponding to the end face of the bottle mouth 73 to ensure sealing. The bottle cap 72 is provided with a first cannula 75 and a second cannula 76. The bottom end of the first cannula 75 is rigid. The second pipe 8 is inserted into the buffer bottle 7, the bottom end of the second cannula 76 is arranged close to the bottom of the buffer bottle 7, the two ends of the first pipe 6 are respectively connected to the suction port of the vacuum pump 5 and the top of the first cannula 75, the two ends of the second pipe 8 are respectively connected to the top of the second cannula 76 and the suction joint 9, the suction joint 9 is used to connect the suction interface 31 on the plunger pump 3; the one-way valve 10 is arranged on the first pipe 6 to prevent gas backflow; the pressure sensor 11 is arranged on the second pipe 8, for monitoring the air pressure changes in the plunger pump.

[0018] During specific use, a solution that can absorb lubricating oil, such as ethanol or an aqueous solution with detergent added, is poured into the buffer bottle 7. The solution should cover the bottom end of the second cannula 76 and remain a distance from the bottom end of the first cannula 75. The inlet blocking device 1 is used to block the inlet of the plunger pump 3, and the outlet blocking device 2 is used to block the outlet of the plunger pump 3. The air suction joint 9 is connected to the air suction interface 31 on the plunger pump 3; the inflation interface 4 is externally connected to an inflation device to inflate the plunger pump 3. After the high-pressure gas makes the two diaphragm sheets in the plunger pump 3 fit together, the air suction pump 5 is started, and the one-way valve 10 is opened to achieve Rapidly evacuate the air, and when the set pressure is reached, the vacuum pump 5 is turned off and the pressure is maintained within the set time period. If the pressure loss exceeds the set range, it is a leakage. If there is no pressure loss or does not exceed the set range, it is no leakage. During the evacuation process, the gas will first pass through the solution in the buffer bottle 7, and the lubricating oil drawn out from the plunger pump 3 will dissolve in the solution to avoid entering the vacuum pump 5. In order to facilitate the observation of the liquid level in the bottle, a strip window 77 extending axially is provided on the bottle body 71. When more lubricating oil is dissolved in the solution, the bottle cap 72 can be opened to replace the solution, which is convenient for maintenance.

[0019] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for protection of the utility model.

Claims

1. A plunger pump diaphragm leak detection device, Features: It includes an inlet blocking device, an outlet blocking device and a gas suction device, the inlet blocking device is used to block the inlet of the plunger pump, the inlet blocking device is provided with an inflation interface, and the outlet blocking device is used to block the outlet of the plunger pump; the gas suction device includes an air pump, a first pipeline, a buffer bottle, a second pipeline and an air suction joint, the top of the buffer bottle is provided with a first cannula and a second cannula, the bottom end of the first cannula just extends into the buffer bottle, the bottom end of the second cannula is arranged close to the bottom of the buffer bottle, the two ends of the first pipeline are respectively connected to the air suction port of the air pump and the top end of the first cannula, the two ends of the second pipeline are respectively connected to the top end of the second cannula and the air suction joint, and the air suction joint is used to connect to the air suction interface on the plunger pump.

2. The plunger pump diaphragm leak detection device according to claim 1, Features: The buffer bottle includes a bottle body and a bottle cap, the top of the bottle body is provided with a bottle mouth, the bottle cap is connected to the bottle mouth by threads, a sealing gasket is provided on the inner side of the bottle cap corresponding to the end face of the bottle mouth, and the first insert tube and the second insert tube are both provided on the bottle cap.

3. The plunger pump diaphragm leak detection device according to claim 2, Features: The bottle body is provided with a strip-shaped viewing window extending in the axial direction.

4. The plunger pump diaphragm leak detection device according to any one of claims 1 to 3, Features: A one-way valve is arranged on the first pipeline.

5. The plunger pump diaphragm leak detection device according to claim 4, Features: The second pipeline is provided with a pressure sensor.

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