A centrifugal pump seal testing device

Abstract

This invention provides a centrifugal pump seal testing device, including a base and a bracket. An air extraction assembly, comprising an air pump and a filter cartridge, is mounted on the bracket. An air storage assembly, including an air tank and a connecting pipe, is also mounted on the bracket. An air delivery assembly, comprising an outlet pipe and a bellows, is mounted on the air tank. A self-testing assembly, including a conduit and a valve, is mounted on the conduit. A centrifugal pump connection assembly is mounted on the conduit. This centrifugal pump seal testing device avoids inaccurate seal testing due to air leakage at the connection point, ensuring the reliability of the seal testing results. It also prevents temperature rise caused by the centrifugal pump running dry, ensuring the safety of the centrifugal pump. Furthermore, it enables seal testing of the centrifugal pump under operating conditions, ensuring the accuracy of the seal testing results and ensuring effective heat dissipation of the airflow. This device is suitable for seal testing of centrifugal pumps.

Description

Technical Field

[0001] This invention relates to the field of sealing testing equipment technology, specifically a centrifugal pump sealing testing device. Background Technology

[0002] To ensure the safe operation of centrifugal pumps, sealing tests are necessary, requiring sealing testing equipment. Patent application CN202010127696.X discloses a device for testing the sealing performance of a refining pump. This device applies vibration to the pump using a vibrating seat and controls the vibration through a control system. This effectively simulates the vibration experienced by the pump in its actual working environment, thus improving the accuracy of sealing performance testing. However, existing centrifugal pump sealing testing devices have several drawbacks. First, leaks at connections can interfere with the test results, compromising accuracy. Second, they often only perform static sealing tests, which are particularly problematic when liquid centrifugal pumps are running dry, hindering testing under operating conditions. Third, ensuring sealing under operating conditions requires cooling, but existing cooling fans cannot adjust the outlet size according to the pump's size, resulting in significant airflow that fails to provide adequate cooling, thus reducing cooling efficiency. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a centrifugal pump seal testing device to solve the problems mentioned in the background art. This invention has a novel structure, multiple functions, and is suitable for the seal testing of centrifugal pumps.

[0004] To achieve the above objectives, the present invention provides the following technical solution: a centrifugal pump sealing detection device, comprising a base and a support, wherein an air extraction assembly is mounted on the support, the air extraction assembly comprising an air pump and a filter cartridge, an air storage assembly is mounted on the support, the air storage assembly comprising an air tank and a connecting pipe, an air delivery assembly is mounted on the air tank, the air delivery assembly comprising an outlet pipe and a corrugated pipe, a self-testing assembly is mounted on the corrugated pipe, the self-testing assembly comprising a conduit and a valve, a centrifugal pump connection assembly is mounted on the conduit, the centrifugal pump connection assembly comprising a clamping plate and a sealing gasket, and a heat dissipation assembly is mounted on the base, the heat dissipation assembly comprising a fan duct and a fan.

[0005] Furthermore, the bracket is welded to the top of the base, the air pump is bolted to the top of the bracket, the filter cartridge is bolted to the bottom of the air pump, the inner side of the filter cartridge is connected to the air pump, the air tank is bolted to the top of the bracket, and the air pump is connected to the air tank via a connecting pipe.

[0006] Furthermore, the outlet pipe is welded to one side of the gas tank, one end of the bellows is welded to the outlet pipe, the other end of the bellows is welded to one end of the conduit, the valve is installed inside the conduit, the top of the clamping plate is welded to the other end of the conduit, the sealing gasket is adhered to the bottom of the clamping plate, and an opening is provided on the inner side of the clamping plate, with the conduit connected to the opening.

[0007] Furthermore, a screw is installed on the card plate, the top end of the screw is clamped on the top of the card plate, the bottom end of the screw passes through the card plate and extends to the bottom of the card plate, a clamping plate is installed at the bottom of the card plate, the clamping plate is installed at the bottom end of the screw through a bearing, an external thread is provided on the outer side of the screw, and an internal thread is provided on the inner side of the card plate, the external thread and the internal thread are engaged.

[0008] Furthermore, an outer plate is welded to the outer side of the top end of the conduit, and a rubber sleeve is bonded to the bottom of the outer plate. The rubber sleeve is fitted onto the outside of the conduit, and a rubber ring is integrally formed at the bottom of the rubber sleeve. A pressure gauge is bolted to the top of the outer plate, and the pressure gauge is connected to the bottom of the outer plate.

[0009] Furthermore, a second pressure gauge is bolted to the outside of the gas tank, and the second pressure gauge is connected to the inside of the gas tank. A pipe is welded to the bottom of the gas tank, and a drain valve is installed on the pipe.

[0010] Furthermore, the air duct is bolted to the top of the base, the fan is bolted to the inside of the air duct, and a mesh is bolted to the inner wall of one end of the air duct.

[0011] Furthermore, a conical sleeve is adhered to the inner wall of the other end of the air duct. The diameter of the other end of the conical sleeve is smaller than the diameter of the first end of the conical sleeve. The conical sleeve is a rubber conical sleeve.

[0012] Furthermore, a support rod is bonded to the outer side of the conical sleeve. The support rod is installed on the outer side of the other end of the air duct via a rotating shaft. A collar is fitted on the outer side of the support rod. An internal thread is formed on the inner side of the collar. An external thread is formed on the outer side of the support rod. The internal thread and the external thread cooperate with each other. The support rod is evenly distributed on the outer side of the conical sleeve.

[0013] Furthermore, a frequency converter is bolted to the top of the base, and a switch assembly is bolted to the frequency converter. The switch assembly is connected to the air pump, the fan, and the frequency converter via wires.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. When using this centrifugal pump sealing test device, the air pump is turned on via the switch group. The air pump draws in air through the filter cartridge and pumps it to the inside of the air tank, forming high-pressure air. The valve on the conduit is then closed. After turning off the air pump, the sealing performance of the test device is checked by observing whether the pressure gauge 2 drops. When the sealing box of the test device is in good condition, the clamps on the two clamping plates are respectively clamped onto the flanges on the inlet and outlet of the centrifugal pump. The screw is turned so that the clamping plates seal with the flanges on the inlet and outlet of the centrifugal pump through the sealing gasket. The valve is then opened, and the high-pressure air in the air tank enters the inside of the centrifugal pump. The rubber ring is then pulled open and placed on the outside of the flanges on the inlet and outlet of the centrifugal pump. If necessary, the rubber sleeve is tightened with a rope. The pressure gauge 1 can detect whether there is a leak at the connection between the clamping plate and the centrifugal pump, and the pressure gauge 2 on the air tank can be used to test the sealing performance of the centrifugal pump. This effectively avoids inaccurate sealing test results due to air leakage at the connection point, ensuring the reliability of the centrifugal pump sealing test results.

[0016] 2. After completing the static test of the centrifugal pump, the centrifugal pump seal testing device connects the frequency converter to the centrifugal pump via wires and adjusts the frequency converter to a lower level. This effectively reduces the current generated by the centrifugal pump during idling, thereby reducing the heat generated. Simultaneously, the centrifugal pump motor is placed inside the conical sleeve on the air duct, and air is drawn in by a fan to ventilate and cool the centrifugal pump, ensuring its safe operation and preventing temperature rise due to idling. This effectively performs seal testing on the centrifugal pump during operation, ensuring the accuracy of the seal test results.

[0017] 3. When the centrifugal pump sealing detection device is used for heat dissipation of the centrifugal pump, the collar is adjusted according to the size of the centrifugal pump motor. The collar moves to the left on the outer side of the support rod through the thread, and the collar squeezes the support rod, causing the left end of the support rod to move closer to the outer side of the air duct. The right end of the support rod opens the right end of the cone sleeve outward, so that the inner side of the right end of the cone sleeve can accommodate the centrifugal pump motor. During heat dissipation, the fan blows airflow through the air duct onto the cone sleeve. The airflow flows along the outer side of the centrifugal pump motor under the limit of the cone sleeve, which greatly increases the airflow velocity of the centrifugal pump motor, ensuring that the airflow generated by the fan is effectively cooled, improving heat dissipation efficiency, and further ensuring the safety of the centrifugal pump. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of a centrifugal pump seal detection device according to the present invention;

[0019] Figure 2 This is a cross-sectional view of a centrifugal pump seal detection device according to the present invention;

[0020] Figure 3 This is a cross-sectional view of the card plate of a centrifugal pump seal detection device according to the present invention;

[0021] Figure 4 This is a cross-sectional view of the air duct of a centrifugal pump seal detection device according to the present invention;

[0022] In the diagram: 1. Base; 2. Bracket; 3. Air pump; 4. Filter cartridge; 5. Air tank; 6. Connecting pipe; 7. Outlet pipe; 8. Corrugated pipe; 9. Conduit; 10. Clamping plate; 11. Sealing gasket; 12. Valve; 13. Clamping plate; 14. Screw; 15. Outer plate; 16. Rubber sleeve; 17. Rubber ring; 18. Pressure gauge one; 19. Pressure gauge two; 20. Air duct; 21. Fan; 22. Conical sleeve; 23. Support rod; 24. Collar; 25. Frequency converter; 26. Switch assembly. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0024] Please see Figures 1 to 4 This invention provides a technical solution: a centrifugal pump sealing detection device, including a base 1 and a bracket 2. An air extraction assembly is mounted on the bracket 2, comprising an air pump 3 and a filter cartridge 4. An air storage assembly is mounted on the bracket 2, comprising an air tank 5 and a connecting pipe 6. An air delivery assembly is mounted on the air tank 5, comprising an outlet pipe 7 and a corrugated pipe 8. A self-testing assembly is mounted on the corrugated pipe 8, comprising a conduit 9 and a valve 12. A centrifugal pump connection assembly is mounted on the conduit 9, comprising a clamping plate 10 and a sealing gasket 11. A heat dissipation assembly is mounted on the base 1, comprising a duct 20 and a fan 21. The duct 20 is bolted to the top of the base 1, and the fan 21 is bolted to the inside of the duct 20. A sealing gasket is installed on the inner wall of one end of the duct 20. A mesh is bolted on, and a frequency converter 25 is bolted to the top of the base 1. A switch assembly 26 is bolted to the frequency converter 25. The switch assembly 26 is connected to the air pump 3, the fan 21, and the frequency converter 25 via wires. After completing the static test of the centrifugal pump, the frequency converter 25 is connected to the centrifugal pump via wires, and the frequency of the frequency converter 25 is adjusted to a lower state, thereby effectively reducing the current generated by the centrifugal pump when it is idling, and thus reducing the heat generated. At the same time, the motor of the centrifugal pump is placed inside the cone sleeve 22 on the air duct 20, and the fan 21 is used to draw in air and ventilate and cool the centrifugal pump, ensuring the safe operation of the centrifugal pump and avoiding the temperature rise caused by the centrifugal pump idling. This ensures the safety of the centrifugal pump and enables effective sealing test of the centrifugal pump under working conditions, ensuring the accuracy of the sealing test results.

[0025] In this embodiment, the bracket 2 is welded to the top of the base 1, the air pump 3 is bolted to the top of the bracket 2, the filter cartridge 4 is bolted to the bottom of the air pump 3, and the inner side of the filter cartridge 4 is connected to the air pump 3. The air tank 5 is bolted to the top of the bracket 2, and the air pump 3 is connected to the air tank 5 via a connecting pipe 6. The outlet pipe 7 is welded to one side of the air tank 5, one end of the corrugated pipe 8 is welded to the outlet pipe 7, and the other end of the corrugated pipe 8 is welded to one end of the conduit 9. The valve 12 is installed inside the conduit 9, the top of the clamping plate 10 is welded to the other end of the conduit 9, the sealing gasket 11 is adhered to the bottom of the clamping plate 10, and the inner side of the clamping plate 10 has an opening. 9 is connected to the through port. A screw 14 is installed on the clamping plate 10. The top end of the screw 14 is clamped to the top of the clamping plate 10, and the bottom end of the screw 14 passes through the clamping plate 10 and extends to the bottom of the clamping plate 10. A clamping plate 13 is installed at the bottom of the clamping plate 10. The clamping plate 13 is installed at the bottom end of the screw 14 by a bearing. An external thread is formed on the outer side of the screw 14, and an internal thread is formed on the inner side of the clamping plate 10. The external thread and the internal thread cooperate with each other. An outer plate 15 is welded to the outer side of the top end of the guide tube 9. A rubber sleeve 16 is glued to the bottom of the outer plate 15. The rubber sleeve 16 is fitted on the outside of the guide tube 9. A rubber ring 17 is integrally formed at the bottom of the rubber sleeve 16. A pressure gauge 18 is bolted to the top of the outer plate 15 and is connected to the bottom of the outer plate 15. A pressure gauge 19 is bolted to the outside of the gas tank 5 and is connected to the inside of the gas tank 5. A pipe is welded to the bottom of the gas tank 5, and a drain valve is installed on the pipe. In use, the air pump 3 is turned on by the switch assembly 26. The air pump 3 draws in air through the filter cartridge 4 and pumps it to the inside of the gas tank 5 to form high-pressure air. The valve 12 on the conduit 9 is then closed. After turning off the air pump 3, the sealing of the testing equipment is checked by checking whether the pressure gauge 19 drops. When the sealing of the testing equipment is good, the clamps 13 on the two clamping plates 10 are respectively clamped. Turn the screw 14 on the flanges at the inlet and outlet of the centrifugal pump so that the clamping plate 10 seals with the flanges at the inlet and outlet of the centrifugal pump through the sealing gasket 11. Open the valve 12 so that the high-pressure air in the air tank 5 enters the inside of the centrifugal pump. Then pull open the rubber ring 17 and put it on the outside of the flanges at the inlet and outlet of the centrifugal pump. If necessary, use a rope to tighten the rubber sleeve 16. The pressure gauge 18 can be used to detect whether there is a poor seal at the connection between the clamping plate 10 and the centrifugal pump. The pressure gauge 2 18 on the air tank 5 can be used to test the sealing performance of the centrifugal pump. This effectively avoids the inaccuracy of the sealing test mechanism due to air leakage at the connection position and ensures the reliability of the sealing test results of the centrifugal pump.

[0026] In this embodiment, a conical sleeve 22 is adhered to the inner wall of the other end of the air duct 20. The diameter of the other end of the conical sleeve 22 is smaller than the diameter of the first end. The conical sleeve 22 is a rubber conical sleeve. A support rod 23 is adhered to the outer side of the conical sleeve 22. The support rod 23 is mounted on the outer side of the other end of the air duct 20 via a rotating shaft. A collar 24 is fitted on the outer side of the support rod 23. The inner side of the collar 24 has an internal thread, and the outer side of the support rod 23 has an external thread. The internal thread and the external thread cooperate with each other. The support rods 23 are evenly distributed on the outer side of the conical sleeve 22. When the centrifugal pump is cooling, the size of the collar 24 is adjusted according to the size of the centrifugal pump motor. Ring 24, the collar 24 moves to the left on the outer side of the support rod 23 via a thread, thereby squeezing the support rod 23 with the collar 24, causing the left end of the support rod 23 to move closer to the outer side of the air duct 20, and the right end of the support rod 23 to open the right end of the cone sleeve 22 outward, so that the inner side of the right end of the cone sleeve 22 can accommodate the motor of the centrifugal pump. During heat dissipation, the fan 21 blows airflow onto the cone sleeve 22 through the air duct 20. The airflow flows along the outer side of the motor of the centrifugal pump under the limitation of the cone sleeve 22, thereby greatly increasing the airflow speed of the centrifugal pump motor, ensuring that the airflow generated by the fan 21 is effectively cooled, improving the heat dissipation efficiency, and further ensuring the safety of the centrifugal pump.

[0027] This centrifugal pump sealing test device provides power to all electrical equipment via an external power supply. During operation, the air pump 3 is turned on via switch group 26. Air pump 3 draws in air through filter cartridge 4 and pumps it to the inside of air tank 5, creating high-pressure air. Valve 12 on conduit 9 is then closed. After turning off air pump 3, the sealing performance of the test device is checked by observing whether the pressure gauge 19 drops. When the sealing box of the test device is in good condition, the clamps 13 on the two clamping plates 10 are respectively clamped onto the flanges at the inlet and outlet of the centrifugal pump. The screw 14 is rotated, causing the clamping plates 10 to seal against the flanges at the inlet and outlet of the centrifugal pump through the sealing gasket 11. The device is then opened. Valve 12 allows high-pressure air from tank 5 to enter the centrifugal pump. Rubber ring 17 is then pulled open and fitted onto the outside of the flanges at the pump's inlet and outlet. If necessary, the rubber sleeve 16 is tightened with a rope. Pressure gauge 18 is used to check for leaks at the connection between the clamping plate 10 and the centrifugal pump. Pressure gauge 2 18 on tank 5 is used to check the pump's seal, effectively preventing inaccuracies in the seal test due to leaks at the connection point and ensuring reliable seal test results. After completing the static test of the centrifugal pump, the frequency converter 25 is connected to the pump via electrical wires. The frequency of the inverter 25 is adjusted to a lower level, thereby effectively reducing the current generated by the centrifugal pump during idling and thus reducing the heat generated. Simultaneously, the centrifugal pump motor is placed inside the conical sleeve 22 on the air duct 20, and air is drawn in by the fan 21 to ventilate and cool the centrifugal pump, ensuring its safe operation and preventing temperature rise due to idling. This also allows for effective sealing testing of the centrifugal pump during operation, ensuring the accuracy of the sealing test results. When cooling the centrifugal pump, the collar 24 is adjusted according to the size of the centrifugal pump motor. The collar 24 is connected via a thread... The support rod 23 moves to the left on the outer side, and the collar 24 squeezes the support rod 23, causing the left end of the support rod 23 to move closer to the outer side of the air duct 20. The right end of the support rod 23 opens the right end of the cone sleeve 22 outward, so that the inner side of the right end of the cone sleeve 22 can accommodate the motor of the centrifugal pump. When the cooling is working, the fan 21 blows airflow through the air duct 20 to the cone sleeve 22. The airflow flows along the outer side of the motor of the centrifugal pump under the limit of the cone sleeve 22, which can greatly increase the airflow speed of the motor of the centrifugal pump, ensure that the airflow generated by the fan 21 is effectively cooled, improve the cooling efficiency, and further ensure the safety of the centrifugal pump.

[0028] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0029] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A centrifugal pump seal testing device, comprising a base (1) and a bracket (2), wherein an air extraction assembly is mounted on the bracket (2), the air extraction assembly comprising an air pump (3) and a filter cartridge (4), an air storage assembly is mounted on the bracket (2), the air storage assembly comprising an air tank (5) and a connecting pipe (6), an air delivery assembly is mounted on the air tank (5), the air delivery assembly comprising an outlet pipe (7) and a corrugated pipe (8), characterized in that: A self-testing assembly is installed on the corrugated pipe (8), the self-testing assembly including a conduit (9) and a valve (12). A centrifugal pump connection assembly is installed on the conduit (9), the centrifugal pump connection assembly including a clamping plate (10) and a sealing gasket (11). A heat dissipation assembly is installed on the base (1), the heat dissipation assembly including a duct (20) and a fan (21). The outlet pipe (7) is welded to one side of the gas tank (5). One end of the corrugated pipe (8) is welded to the outlet pipe (7), and the other end of the corrugated pipe (8) is welded to one end of the conduit (9). The valve (12) is installed on... The top of the clamping plate (10) is welded to the other end of the conduit (9) on the inner side of the conduit (9). The sealing gasket (11) is bonded to the bottom of the clamping plate (10). An opening is provided on the inner side of the clamping plate (10). The conduit (9) is connected to the opening. A screw (14) is installed on the clamping plate (10). The top end of the screw (14) is clamped to the top of the clamping plate (10). The bottom end of the screw (14) passes through the clamping plate (10) and extends to the bottom of the clamping plate (10). A clamping plate (13) is installed at the bottom of the clamping plate (10). The clamping plate (13) is mounted on the bottom of the clamping plate (10) by bearings. At the bottom end of the screw (14), an external thread is provided on the outer side of the screw (14), and an internal thread is provided on the inner side of the clamping plate (10). The external thread and the internal thread are matched. An outer plate (15) is welded to the outer side of the top end of the conduit (9). A rubber sleeve (16) is bonded to the bottom of the outer plate (15). The rubber sleeve (16) is fitted on the outside of the conduit (9). A rubber ring (17) is integrally formed at the bottom of the rubber sleeve (16). A pressure gauge (18) is installed on the top of the outer plate (15) by bolts. The pressure gauge (18) is connected to the outer plate. (15) The bottom is connected. When in use, the clamps (13) on the two clamps (10) are respectively clamped on the flanges on the inlet and outlet of the centrifugal pump. The screw (14) is turned so that the clamps (10) are sealed with the flanges on the inlet and outlet of the centrifugal pump through the sealing gasket (11). The valve (12) is opened and the high-pressure air in the air tank (5) enters the inside of the centrifugal pump. Then the rubber ring (17) is pulled open and put on the outside of the flanges on the inlet and outlet of the centrifugal pump. The pressure gauge (18) can detect whether there is a problem with the connection between the clamps (10) and the centrifugal pump.

2. The centrifugal pump seal testing device according to claim 1, characterized in that: The bracket (2) is welded to the top of the base (1). The air pump (3) is installed on the top of the bracket (2) by bolts. The filter cartridge (4) is installed on the bottom of the air pump (3) by bolts. The inner side of the filter cartridge (4) is connected to the air pump (3). The air tank (5) is installed on the top of the bracket (2) by bolts. The air pump (3) is connected to the air tank (5) by connecting pipe (6).

3. The centrifugal pump seal testing device according to claim 1, characterized in that: A second pressure gauge (19) is bolted to the outside of the gas tank (5). The second pressure gauge (19) is connected to the inside of the gas tank (5). A drain pipe is welded to the bottom of the gas tank (5), and a drain valve is installed on the drain pipe.

4. The centrifugal pump seal testing device according to claim 1, characterized in that: The air duct (20) is bolted to the top of the base (1), the fan (21) is bolted to the inside of the air duct (20), and a mesh is bolted to the inner wall of one end of the air duct (20).

5. A centrifugal pump seal testing device according to claim 4, characterized in that: A conical sleeve (22) is adhered to the inner wall of the other end of the air duct (20). The diameter of the other end of the conical sleeve (22) is smaller than the diameter of one end of the conical sleeve (22). The conical sleeve (22) is a rubber conical sleeve.

6. A centrifugal pump seal testing device according to claim 5, characterized in that: A support rod (23) is bonded to the outer side of the conical sleeve (22). The support rod (23) is installed on the outer side of the other end of the air duct (20) via a rotating shaft. A collar (24) is fitted on the outer side of the support rod (23). An internal thread is provided on the inner side of the collar (24). An external thread is provided on the outer side of the support rod (23). The internal thread and the external thread cooperate with each other. The support rod (23) is evenly distributed on the outer side of the conical sleeve (22).

7. A centrifugal pump seal testing device according to claim 6, characterized in that: A frequency converter (25) is bolted to the top of the base (1), and a switch assembly (26) is bolted to the frequency converter (25). The switch assembly (26) is connected to the air pump (3), the fan (21) and the frequency converter (25) by wires.

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