A water pump durability test system and method

Abstract

The application relates to the technical field of shielding pumps, and discloses a water pump endurance test system and method, in order to solve the problem of whether various additives can damage the water pump, a real underfloor heating pipe is added in the test system, the test space is greatly concentrated, the length of the underfloor heating pipe is consistent with the length of a pipeline in an actual system used by the corresponding water pump, the reliability of the test is greatly improved, two sets of pressurizing systems are added to the system, the system pressure during the test is well ensured, the whole system is controlled by a system control module, the system is relatively high in intelligence, and the test process is convenient and fast. Moreover, the working conditions during actual use of the water pump are more truly simulated, and the reliability of a new product is greatly improved.

Description

Technical Field

[0001] This invention relates to the technical field of canned motor pumps, and in particular to a pump durability testing system and method. Background Technology

[0002] In the development process of new products (specifically water pumps), a crucial step is rigorous reliability verification. To accurately assess the performance and durability of a water pump, its operating conditions in real-world application scenarios must be simulated. Given that water pumps are often deployed in heating systems, and these systems frequently incorporate various chemicals to maintain system performance, including but not limited to pipe rust removers, pipe cleaners, corrosion and scale inhibitors, antifreeze, and sludge removers, the introduction of these additives may have unknown or potentially damaging effects on the pump's materials, seals, and even its overall performance.

[0003] However, there is currently a lack of clear understanding and data support regarding how these additives specifically affect the performance of water pumps and their long-term operational reliability. Therefore, designing and implementing a testing system that can highly replicate actual operating conditions is particularly important. Summary of the Invention

[0004] This invention proposes a water pump durability testing system and method, which has the advantage of simulating real-world operating conditions, and is used to solve the problem raised in the background art regarding whether various additives cause damage to water pumps.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a water pump durability testing system, comprising: a water tank for storing water medium; an electromagnetic flow meter connected to the water tank via a pipeline for real-time monitoring of pipeline flow; a temperature sensor fixed on the outside of the water tank for monitoring the real-time temperature inside the water tank; a pressure sensor fixed on the side of the water tank for real-time monitoring of the internal pressure of the water tank; a heating pipe extending into the water tank for heating the medium inside the water tank; a safety pressure relief valve fixed on the top of the water tank for automatic pressure relief; a control module for data analysis and autonomous adjustment of subsequent modules; and a solenoid valve group consisting of solenoid valve one, solenoid valve two, solenoid valve three, solenoid valve four, solenoid valve five, solenoid valve six, and solenoid valve six. The system consists of valve seven and solenoid valve eight. Solenoid valve one is located between the pipeline of the electromagnetic flowmeter and the water tank. Solenoid valve two is located between the pipeline of the test pump and the water tank. Solenoid valves three and four are connected to the inside of the water tank via pipelines. The input pipe of solenoid valve four is connected to the water compressor. Solenoid valve five is connected to the top of the water tank, and solenoid valve six and the air compressor are connected to solenoid valve five. A ball valve is fixed to the top of the water tank, and a funnel is connected above the ball valve. A level gauge is fixed to the side of the water tank to indicate the water volume in the system. A power supply is used to supply power to the test pump and feed the monitoring data back to the control module. The output pipe of the test pump is connected to solenoid valve eight, which is connected to the test fitting. The output end of the test fitting is connected to solenoid valve seven and then connected to the electromagnetic flowmeter.

[0006] Furthermore, the first type of test fitting includes: an inlet pipe fixedly installed on the solenoid valve eight, an installation groove opened on the side of the inlet pipe, an inlet baffle strip movably installed in the installation groove, a drain pipe fixedly installed on the solenoid valve seven, and a drain baffle strip provided on the outside of the drain pipe, and a connecting pipe fixedly connected between the inlet baffle strip and the drain baffle strip.

[0007] Furthermore, a motor is fixedly installed inside the inlet pipe, and a drive rod is fixedly installed on the motor output shaft. The drive rod is used to drive the outer pitch-extending screw to rotate synchronously. A locking rod is installed on the inlet baffle bar, and the locking rod abuts against the threaded groove on the outer side of the pitch-extending screw.

[0008] Furthermore, a pressure gauge is fixedly installed at the top of the drain pipe.

[0009] Furthermore, the pitch-extending screw is inserted into the drive rod via a cylindrical rod, and a shifting spring is connected between the cylindrical rod and the drive rod. A seal is fixedly installed on the inside of the inlet pipe.

[0010] Furthermore, a threaded cylinder is fixedly installed at the end of the pitch-extending screw, an unlocking stop is movably installed at the end of the inlet pipe, an adjusting screw is fixedly installed at the end of the unlocking stop and threadedly connected to the threaded cylinder, an adjusting rod is movably installed at the end of the drain pipe, and a tension spring is provided between the adjusting rod and the inlet pipe. A guide rail is fixedly installed on the outer side of the adjusting rod, an unlocking arm is movably installed on the inlet baffle, the other end of the unlocking arm is movably installed on the guide rail, an unlocking groove is opened on the side of the unlocking arm, and a protrusion is provided at the end of the locking rod and placed in the unlocking groove.

[0011] Furthermore, a switching seat is movably installed inside the drain pipe, and an annular groove is provided on the outside of the switching seat. A return spring is provided between the switching seat and the drain pipe. A detection rod is movably installed on the drain baffle. The top of the detection rod is movably installed to the outside of the connecting pipe. A spring is connected between the connecting pipe and the detection rod. An unlocking stop arm is fastened to the guide rail.

[0012] Furthermore, an inclined surface is provided in the middle of the test rod.

[0013] Furthermore, the second type of pipe used in the test is the underfloor heating pipe.

[0014] A method for testing the durability of a water pump includes the following steps:

[0015] S1. Based on the application of the test pump in the actual underfloor heating system, determine the length of the test pipe fitting, which matches the total length of the pipeline in the actual system; according to the preset ratio of additive to water, operate solenoid valve four to open, and use the water press to add water to the water tank in the system until the required water volume is reached, then close solenoid valve four.

[0016] S2. Manually open the ball valve and add the specified amount of additive into the system through the funnel. Then close the ball valve to ensure that the additive is evenly distributed in the water tank.

[0017] S3. The pressure sensor monitors the pressure inside the water tank in real time and transmits the data to the control module. If the system water volume reaches 300L, the water tank is pressurized by a hydraulic press until the specified test pressure is reached. If the water volume does not reach 300L, the control module instructs the air compressor to pressurize the water until the specified test pressure is reached.

[0018] S4. The temperature inside the water tank is monitored by a temperature sensor, and the data is fed back to the control module. The control module controls the heating tube to heat the medium according to the test requirements until the specified test water temperature is reached.

[0019] S5. Open solenoid valves 1, 2, 7 and 8 to power on the test pump and start it running; conduct the durability and start-stop tests of the additives according to the required test time to evaluate the impact of the additives on the performance of the test pump.

[0020] S6. After the test, turn off the power and close solenoid valves 7, 8, 1, and 2 through the control module, and simultaneously close the heating tube. If an air compressor is used for pressurization, open solenoid valve 6 through the control module to release pressure, and then open solenoid valve 3 to drain the medium in the system, in preparation for the next additive test.

[0021] S7. Export the real-time monitoring time flow rate, time power, and time current curves from the control module to analyze and evaluate the pump's operational stability throughout the entire test.

[0022] The present invention has the following beneficial effects:

[0023] This invention provides a water pump durability testing system and method. The system cleverly incorporates a real underfloor heating pipe. This design not only significantly reduces the test space, but also accurately simulates the pipe length of the water pump in a real-world application system, thus significantly improving the reliability and realism of the test. Furthermore, the system is equipped with a dual pressurization system to ensure stable and accurate system pressure during the test, further enhancing the accuracy of the test. The entire testing system is intelligently managed by an advanced system control module, making operation simple and quick, greatly improving the convenience of the test. Most importantly, this system can highly replicate the operating conditions of a water pump in actual use, providing more rigorous durability verification for new products, thereby significantly improving the reliability of new products. Attached Figure Description

[0024] The accompanying drawings, which form part of this specification, illustrate embodiments of the invention and, together with the specification, serve to explain the principles of the invention.

[0025] The invention will be more clearly understood with reference to the accompanying drawings and the following detailed description, wherein:

[0026] Figure 1 This is a schematic diagram of the test system structure;

[0027] Figure 2 A schematic diagram showing the location and three-dimensional structure of the inlet and outlet pipes;

[0028] Figure 3 A schematic diagram of the inlet and outlet pipes in frontal view.

[0029] Figure 4 This is a schematic diagram of the internal three-dimensional structure of the drain pipe;

[0030] Figure 5 A schematic diagram of the three-dimensional structure of the test rod;

[0031] Figure 6 This is a schematic diagram of the internal three-dimensional structure of the inlet pipe;

[0032] Figure 7 A schematic diagram showing the position and three-dimensional structure between the drive rod and the pitch-extending screw;

[0033] Figure 8 This is a schematic diagram of the three-dimensional structure of the guide rail.

[0034] In the diagram: 1. Electromagnetic flowmeter; 2. Temperature sensor; 3. Pressure sensor; 4. Heating element; 5. Safety relief valve; 6. Solenoid valve assembly; 601. Solenoid valve one; 602. Solenoid valve two; 603. Solenoid valve three; 604. Solenoid valve four; 605. Solenoid valve five; 606. Solenoid valve six; 607. Solenoid valve seven; 608. Solenoid valve eight; 7. Ball valve; 8. Underfloor heating pipe; 9. Test pump; 10. Funnel; 11. Level gauge; 12. Power supply; 13. Hydraulic press; 14. Control module; 15. Air compressor; 16. Inlet pipe; 161. Inlet baffle; 17. Drain pipe; 171. Drain baffle; 18. Connecting pipe; 19. Detection rod; 20. Pressure gauge; 21. Adjusting rod; 22. Guide rail; 23. Unlocking arm; 230. Unlocking channel; 24. Unlocking stop arm; 25. Locking rod; 26. Switching seat; 260. Return spring; 27. Motor; 28. Drive rod; 29. ​​Pitching screw; 30. Shifting spring; 31. Threaded cylinder; 32. Adjusting screw; 33. Unlocking stop; 34. Seal. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1: The purpose of this invention is to provide a water pump durability testing system and method to verify the reliability of the product under actual operating conditions. For more details, please refer to... Figure 1 As shown, the electromagnetic flowmeter 1 can monitor the pipeline flow rate in real time, the temperature sensor 2 can monitor the real-time temperature inside the water tank, the pressure sensor 3 can monitor the real-time pressure inside the water tank, and the heating element 4 can heat the medium inside the water tank, which is generally water. When the pressure in the water tank is too high, the safety pressure relief valve 5 fixed on the water tank will automatically release the pressure. It should be noted that the electromagnetic flowmeter 1, temperature sensor 2, pressure sensor 3, and heating element 4 can all transmit data to the system control module 14 for later data analysis and autonomous adjustment of subsequent modules.

[0037] The solenoid valve assembly 6, as an electrically controlled component, mainly consists of solenoid valve 601, solenoid valve 602, solenoid valve 603, solenoid valve 604, solenoid valve 605, solenoid valve 606, solenoid valve 607, and solenoid valve 608. The control module 14 can accurately control their opening and closing, taking into account the installation positions of each component. Figure 1 As can be seen, solenoid valve 601 is installed between the electromagnetic flowmeter 1 and the water tank, solenoid valve 602 is located between the test pump 9 and the water tank, and solenoid valve 603 is connected to the inside of the water tank via a pipeline. When solenoid valve 603 is opened, it can discharge the medium in the water tank. Correspondingly, solenoid valve 604 is also installed on this pipeline. Solenoid valve 604 can be used to replenish water medium into the water tank. The input pipe of solenoid valve 604 is also connected to the water press 13, which can be used to replenish external tap water into the water tank and pressurize the water tank. Solenoid valve 605 is connected to the top of the water tank. Solenoid valve 606 and air compressor 15 are connected to solenoid valve 605. Air compressor 15 can be used to pressurize the inside of the water tank to reach the pressure value required for the test. A ball valve 7 is fixedly installed on one side of the top of the water tank, and a funnel 10 is connected above the ball valve 7 to allow various test additives to be injected into the water tank. A level gauge 11 is installed on the side of the water tank to accurately reflect the water volume in the system.

[0038] The test pump 9 is equipped with a stable and independent power supply 12, which monitors the current and power of the test pump 9 in real time and feeds back to the control module 14. The output pipe of the test pump 9 is connected to solenoid valve 608, which is generally connected to the underfloor heating pipe 8. The underfloor heating pipe 8 is coiled up, and its length can be adjusted according to the actual application scenario of the test pump 9. The output end of the underfloor heating pipe 8 is connected to solenoid valve 607 and then connected to electromagnetic flowmeter 1.

[0039] The actual testing method is as follows: Based on the total length of the pipeline in the actual system using the test pump 9, the length of the underfloor heating pipe 8 is selected. Then, according to the ratio of additive to water, solenoid valve 4604 is opened, and water is added to the water tank in the system through water pressure pump 13. After the water volume reaches the required level, solenoid valve 4604 is closed. Next, ball valve 7 is manually opened to add the additive from funnel 10, and finally ball valve 7 is closed.

[0040] The pressure sensor 3 feeds back the pressure to the control module 14, allowing it to know the pressure value of the water tank in the system. If the system water reaches 300L, the water tank is pressurized by the water press 13 to reach the specified test pressure. If the system water does not reach 300L, the control module 14 controls the air compressor 15 to pressurize the system water tank to the specified test pressure. The pressurization method depends on the different ratios of the additives to the water.

[0041] Temperature sensor 2 feeds back the temperature to control module 14, allowing it to know the temperature of the water tank in the system and control heating element 4 to heat the medium to the specified test temperature. Then, solenoid valves 601, 602, 607, and 608 are opened, and test pump 9 is connected to power supply 12 to start running. During this period, durability and start-stop tests of the additives can be conducted according to the required test time, thereby verifying the impact of the additives on test pump 9 during actual operation at the client end.

[0042] After the test is completed, turn off the power supply 12, and use the control module 14 to close solenoid valves 607, 608, 601, and 602, and at the same time turn off the heating tube 4. If the air compressor 15 is pressurizing, open solenoid valve 606 through the control module 14 to depressurize the water tank in the system, and then open solenoid valve 603 to drain the medium in the system before proceeding to the next additive test.

[0043] Finally, the real-time monitoring time flow rate, time power, and time current curves are exported from the control module 14 to determine the operational stability of the water pump throughout the entire test.

[0044] In summary, this testing system is simple in structure, ingenious in design, and practical. It solves the problem of not being able to simulate the actual use of water pumps during the development of new products, greatly improving the reliability of new product water pumps, greatly assisting reliability testing, and ensuring the quality of new products.

[0045] Example 2 is a further improvement on Example 1. Due to differences in the application scenarios of the test pump 9, the length of the underfloor heating pipe 8 needs to be adjusted accordingly. It is worth noting that since the current underfloor heating pipe 8 uses a DN20 round pipe, it is necessary to cut the pipe to the corresponding length when adjusting its length. Due to the diverse usage requirements, a fixed length of underfloor heating pipe 8 obviously cannot meet the needs of actual testing applications. To solve this problem, such as... Figure 2 and Figure 6 As shown, an inlet pipe 16 is fixedly installed on the solenoid valve 8608. It should be noted that the inlet pipe 16 generally needs to be arranged vertically. An installation groove is provided on the side of the inlet pipe 16, parallel to the central axis of the inlet pipe 16. Due to the installation groove, the cross-sectional shape of the inlet pipe 16 is C-shaped. An inlet baffle strip 161 is movably installed in this installation groove, combined with… Figure 6It can be seen that the length of the inlet baffle 161 is greater than that of the inlet pipe 16. Furthermore, both ends of the inlet baffle 161 have anti-detachment protrusions. This ensures that when the inlet baffle 161 moves axially back and forth along the side of the inlet pipe 16, the inner cavity of the inlet pipe 16 remains relatively sealed. After reaching the end of the inlet pipe 16, the anti-detachment protrusions at both ends of the inlet baffle 161 are blocked by the end of the inlet pipe 16, thus limiting the axial movement of the inlet baffle 161. Similarly, combined with the above... Figure 2 and Figure 4 It can be seen that a drain pipe 17 is fixedly installed on the solenoid valve 7607, and a drain baffle 171 is provided on the outside of the drain pipe 17. When the drain baffle 171 moves axially along the side of the drain pipe 17, the inside of the drain pipe 17 can also be in a relatively sealed state. Moreover, as Figures 2-4 It can be seen that a connecting pipe 18 is fixedly connected between the inlet baffle 161 and the outlet baffle 171. The connecting pipe 18 connects the inner cavities of the inlet pipe 16 and the outlet pipe 17. Therefore, when the test pump 9 inputs the medium from the solenoid valve 608 into the inlet pipe 16, the medium entering the inlet pipe 16 flows into the outlet pipe 17 through the connecting pipe 18 and is finally discharged from the solenoid valve 607. As mentioned above, since both the inlet baffle 161 and the outlet baffle 171 can reciprocate axially along the outer side of the inlet pipe 16 and the outlet pipe 17, when the operator pushes the connecting pipe 18 axially along the inlet pipe 16 and the outlet pipe 17, the connecting pipe 18 will move relatively away from / closer to the solenoid valve 608. Figure 3 For example, when the connecting pipe 18 moves upward, the medium flowing in from solenoid valve 8 608 enters the inlet pipe 16, connecting pipe 18, detection rod 19, and solenoid valve 7 607, thus increasing the length of medium flow. Similarly, when the connecting pipe 18 moves downward, the length between the connecting pipe 18 and solenoid valve 8 608 / soleoid valve 7 607 is shortened, thereby shortening the length of medium flow. By moving the connecting pipe 18 up and down, the actual flow length of the medium can be adjusted, ensuring that operators can adjust the length as needed during actual testing, allowing the test pump 9 to operate under the required conditions.

[0046] Based on this, refer to Figure 6It is evident that a motor 27 is fixedly installed inside the inlet pipe 16, and the motor 27 is controlled by the control module 14. Since the motor 27 is located inside the inlet pipe 16, when the medium flows through the inlet pipe 16, it can also carry away the heat generated by the motor 27, achieving water cooling of the motor 27. A drive rod 28 is fixedly installed on the output shaft of the motor 27, and the drive rod 28 can drive the outer pitch-extending screw 29 to rotate synchronously. Correspondingly, a locking rod 25 is installed on the inlet baffle 161, which abuts against the threaded groove on the outer side of the pitch-extending screw 29. When the pitch-extending screw 29 rotates, it can drive the inlet baffle 161 to move axially / at a fixed distance along the inlet pipe 16, allowing the actual medium flow length of the inlet pipe 16 to be precisely controlled according to the control module 14. Figure 3 As can be seen, since the inlet baffle 161 and the outlet baffle 171 move synchronously through the connecting pipe 18, when the inlet baffle 161 moves, the outlet baffle 171 can move synchronously, so that under the influence of the motor 27, the flow length of the medium inside the outlet pipe 17 is also controllable.

[0047] Furthermore, in order to better reflect the medium pressure inside the inlet pipe 16 and the outlet pipe 17, from Figure 3 and Figure 4 As can be seen, a pressure gauge 20 is fixedly installed on the top of the drain pipe 17 and communicates with its inner cavity. The pressure gauge 20 can accurately reflect the pressure changes in the inner cavity of the drain pipe 17 and transmit the detected data to the control module 14, so that the system can accurately know the pressure inside the drain pipe 17 and make it easy to make precise adjustments to the detection environment.

[0048] Example 3 is a further improvement on Example 2. To further extend the flow length of the medium inside the inlet pipe 16, please refer to [link / reference needed]. Figure 6 and Figure 7 It can be clearly seen that the drive rod 28 and the detection push rod 19 are fitted together, and the pitch-extending screw 29 is inserted into the drive rod 28 through a radially arranged cylindrical rod. A displacement spring 30 is connected between the cylindrical rod and the drive rod 28. Under normal conditions, the displacement spring 30 pushes the pitch-extending screw 29 away from the motor 27. Furthermore, combined with... Figure 6 It can be seen that a sealing element 34 is fixedly installed inside the inlet pipe 16. The sealing element 34 is mainly made of rubber and its length is approximately half the length of the inlet pipe 16. Under normal conditions, when the pitch-extending screw 29 is relatively away from the motor 27 under the elastic force of the shifting spring 30, the pitch-extending screw 29 is also relatively away from the sealing element 34. Therefore, when the motor 27 drives the pitch-extending screw 29 to rotate through the drive rod 28, the locking push rod 25 moves along the outer threaded groove of the pitch-extending screw 29 and adjusts the medium flow length. Figure 6As shown, when the inlet baffle 161 moves to the right, the medium flow length increases. When the anti-detachment protrusion at the left end of the inlet baffle 161 abuts against the end of the inlet pipe 16, it indicates that the inlet baffle 161 has reached its right limit, thus restricting the movement of the inlet pipe 16 and simultaneously restricting the movement of the locking rod 25. As the pitch-extending screw 29 rotates continuously, when the outer threaded groove of the pitch-extending screw 29 passes the locking rod 25, it will cause the pitch-extending screw 29 to tend to move towards the motor 27, compressing the shifting spring 30. When the pitch-extending screw 29 is in contact with the seal 34, the medium can only flow through the threaded groove on the outer side of the pitch-extending screw 29, thereby extending the flow length of the medium inside the inlet pipe 16. As the pitch-extending screw 29 is continuously screwed into the seal 34, the length of the medium flow further increases.

[0049] Therefore, it can be seen that this embodiment three can further increase the flow length of the medium with the cooperation of the pitch-extending screw 29 and the seal 34. Furthermore, since the pitch-extending screw 29 is normally relatively far from the seal 34, when the pitch-extending screw 29 moves the inlet baffle 161 via the locking rod 25, the inlet baffle 161 can move axially along the inlet pipe 16, thereby achieving short-distance adjustment of the medium flow length. In this adjusted state, the pitch-extending screw 29 and the seal 34 are relatively far apart, avoiding continuous contact and friction between the seal 34 and the pitch-extending screw 29, which would otherwise cause accelerated wear of the seal 34.

[0050] Example 4 is a further adjustment based on Example 3. To achieve the sealing test of the inside of the inlet pipe 16 and the outlet pipe 17, please refer to... Figures 6-8 It can be seen that a threaded cylinder 31 is fixedly installed at the end of the pitch-extending screw 29. Correspondingly, an unlocking stop 33 is movably installed at the end of the liquid inlet pipe 16. An adjusting screw 32, which is threadedly connected to the threaded cylinder 31, is fixedly installed at the end of the unlocking stop 33. Figure 8 As shown, the unlocking stop 33 can be formed by combining a frustum and a cylinder. The cylinder has an elliptical cross-section, thus restricting the unlocking stop 33 and the adjusting screw 32 to move only along the axial direction of the inlet pipe 16, preventing them from rotating inside the inlet pipe 16. Furthermore, refer to... Figure 3 , Figure 6 and Figure 8 It can be seen that an adjusting rod 21 is movably installed at the end of the drain pipe 17, and a tension spring is provided between the adjusting rod 21 and the inlet pipe 16. Under the action of the tension spring, the end of the adjusting rod 21 is always pressed against the trapezoidal inclined surface of the unlocking stop 33. A guide rail 22 is fixedly installed on the outer side of the adjusting rod 21, combined with... Figure 2 , Figure 6 and Figure 8As can be seen, an unlocking arm 23 is movably mounted on the inlet baffle 161, and the unlocking arm 23 can reciprocate along the radial direction of the inlet pipe 16 via the inlet baffle 161. More specifically, the other end of the unlocking arm 23 is movably mounted on the guide rail 22, allowing the unlocking arm 23 to reciprocate along the guide rail 22. An unlocking groove 230 is provided on the side of the unlocking arm 23. The unlocking groove 230 is an inclined groove. Correspondingly, the end of the locking rod 25 is provided with a protrusion and placed in the unlocking groove 230. Figure 8 As shown, when the unlocking arm 23 moves to the right, the unlocking channel 230 moves to the right in sync, causing the protrusion on the locking rod 25 to move along the unlocking channel 230, forcing the locking rod 25 to tend to move upward until the locking rod 25 disengages from the threaded channel outside the pitch screw 29.

[0051] like Figure 4 As shown, a switching seat 26 is movably installed inside the drain pipe 17. The switching seat 26 is frustoconical in shape, and an annular groove is provided on the outer side of the switching seat 26. A return spring 260 is provided between the switching seat 26 and the drain pipe 17. When the return spring 260 is in its normal state, the switching seat 26 is located at the middle of the drain pipe 17. A detection rod 19 located on one side of the connecting pipe 18 is movably installed on the drain baffle 171. The top of the detection rod 19 is movably installed to the outer side of the connecting pipe 18, and a spring connects the connecting pipe 18 and the detection rod 19, so that the detection rod 19 always has a tendency to push into the drain pipe 17. Based on this, refer to Figures 3-5 and Figure 8 As can be seen, the detection rod 19 has an inclined surface in the middle, and the guide rail 22 has an unlocking stop arm 24 fastened by bolts. When the detection rod 19 moves towards the pressure gauge 20 along with the drain baffle 171, the detection rod 19 will abut against the annular groove on the outside of the switching seat 26. If the unlocking stop arm 24 moves to the side of the drain baffle 171, it will be blocked by the unlocking stop arm 24 on the inclined surface on the outside of the detection rod 19, forcing the detection rod 19 to tend to move upward.

[0052] More specifically, in practical applications, both the inlet pipe 16 and the outlet pipe 17 are installed vertically. When it is necessary to test the sealing performance of the inlet pipe 16 and the outlet pipe 17, the motor 27 drives the pitch-extending screw 29 to rotate forward, causing the locking rod 25 to move the inlet baffle 161 away from the solenoid valve 608. At this time, the flow length of the medium is relatively increased. At the same time, when the connecting pipe 18 moves the outlet baffle 171 synchronously, the detection rod 19 will move closer to the switching seat 26 until the detection rod 19 reaches the annular groove on the outside of the switching seat 26.

[0053] Subsequently, control module 14 operates solenoid valves 607 and 608 to disconnect, thereby sealing the openings of inlet pipe 16 / outlet pipe 17. Then, control module 14 controls motor 27 to rotate in reverse. The rotation of the pitch-extending screw 29 causes the locking rod 25 to push the inlet baffle 161 towards the motor 27. (Refer to...) Figure 6 It can be seen that the leftward movement of the inlet baffle 161 will cause the anti-detachment protrusion at its right end to abut against the right end of the inlet pipe 16, thereby restricting the inlet baffle 161 from continuing to move to the left. Meanwhile, refer to... Figure 4 It can be seen that when the drain baffle 171 moves to the left, the detection push rod 19 abuts against the annular groove on the outside of the switching seat 26, causing the switching seat 26 to move synchronously to the left and stretching the return spring 260. At this time, combined with Figure 3 As shown, the connecting pipe 18 is located at the bottom outside of the inlet pipe 16 / outlet pipe 17.

[0054] refer to Figure 6 As shown, when the liquid inlet baffle 161 moves to its left limit, the locking rod 25 is restricted from moving. Then, the pitch-extending screw 29 continues to reverse. When the outer channel of the pitch-extending screw 29 passes the locking rod 25, the pitch-extending screw 29 tends to move to the right, and the shifting spring 30 is stretched. Moreover, as the pitch-extending screw 29 pushes the threaded cylinder 31 to rotate to the right, the threaded cylinder 31 and the adjusting screw 32 will be connected by threads. It should be noted that the pitch of the adjusting screw 32 is greater than the pitch of the outer threaded channel of the pitch-extending screw 29. Therefore, when the threaded cylinder 31 rotates with the pitch-extending screw 29, the threaded cylinder 31 tends to pull the adjusting screw 32 to the left, and the outer inclined surface of the unlocking bracket 33 pushes the adjusting rod 21 to move outward.

[0055] When the adjusting rod 21 moves away from the inlet pipe 16, it will drive the guide rail 22 to move synchronously. On the one hand, it will make the unlocking arm 23 move away from the inlet baffle 161. Under the guidance of the unlocking channel 230, the locking rod 25 will move upward until the locking rod 25 and the pitch screw 29 are disengaged. After the locking rod 25 and the pitch screw 29 are disengaged, the pitch screw 29 will be forced to move further to the left by the elastic force of the shifting spring 30. The unlocking baffle 33 moving to the left will squeeze the inner cavity of the inlet pipe 16, causing the pressure in the inner cavity of the inlet pipe 16 to increase. Since the inner cavity of the inlet pipe 16 and the inner cavity of the drain pipe 17 are connected, when the pressure in the inner cavity of the inlet pipe 16 increases, the pressure gauge 20 can measure the pressure increase in the inner cavity of the drain pipe 17 and transmit the data to the control module 14.

[0056] On the other hand, the unlocking arm 24 moves with the guide rail 22 and moves to the vicinity of the side of the drain baffle 171. As the locking rod 25 and the pitch screw 29 disengage, the return spring 260 forces the switching seat 26 to move the detection rod 19 to the right. During this process, both the inlet baffle 161 and the drain baffle 17 move axially along the side of their respective inlet pipe 16 / drain pipe 17. If the sealing performance is good during the movement, it indicates that there is no leakage problem, and the value measured by the pressure gauge 20 will not change. Similarly, if the value measured by the pressure gauge 20 decreases during the movement, it indicates that there is a leakage and maintenance is required. When the detection rod 19 approaches the unlocking arm 24, the unlocking arm 24 blocks the outer inclined surface of the detection rod 19, forcing the detection rod 19 to tend to disengage from the annular groove of the switching seat 26. When the detection push rod 19 is completely disengaged from the outer annular groove of the switching seat 26, the locking push rod 25 is not in contact with the pitch-extending screw 29. The connecting pipe 18 moves to the vicinity of the middle of the inlet pipe 16 / outlet pipe 17. Since the movement between the inlet baffle bar 161 and the outlet baffle bar 171 is not restricted, it will move downward under its own weight until the connecting pipe 18 moves to the outer bottom of the inlet pipe 16 / outlet pipe 17 again. At this time, the locking push rod 25 also moves to the initial disengagement position with the outer threaded groove of the pitch-extending screw 29.

[0057] At this point, the sealing test of the inlet pipe 16 and the outlet pipe 17 is completed. The threaded cylinder 31 and the adjusting screw 32 can be disengaged simply by rotating the motor 27 in the forward direction. After the threaded cylinder 31 and the adjusting screw 32 are completely disengaged, the adjusting rod 21 is pushed against the unlocking stop 33 by the tension spring, and the adjusting rod 21 is moved closer to the outside of the inlet pipe 16. The guide rail 22 pushes the unlocking arm 23 to move and uses the unlocking groove 230 to force the locking rod 25 to abut against the outer threaded groove of the pitching screw 29 again. The unlocking stop arm 24 is also relatively away from the outlet baffle 171.

Claims

1. A water pump endurance test system, characterized by, The utility model relates to a kind of water medium test system, including: Water tank, for storing water medium; Electromagnetic flowmeter (1), it is connected between water tank by pipeline, for real-time monitoring pipeline flow; Temperature sensor (2), fixed on the outside of water tank, for monitoring the real-time temperature in water tank; Pressure sensor (3), fixed in the side of water tank, for real-time monitoring the internal pressure of water tank; Heating pipe (4), extend into to the inside of water tank, for heating the medium in water tank; Safety pressure relief valve (5), fixed on the top of water tank, for automatic pressure relief; Control module (14), for data analysis and subsequent module is autonomously adjusted; Solenoid valve group (6), by solenoid valve one (601), solenoid valve two (602), solenoid valve three (603), solenoid valve four (604), solenoid valve five (605), solenoid valve six (606), solenoid valve seven (607) and solenoid valve eight (608); Solenoid valve one (601) is arranged between electromagnetic flowmeter (1) and the pipeline of water tank, solenoid valve two (602) is located between test pump (9) and the pipeline of water tank, solenoid valve three (603) and solenoid valve four (604) are communicated with the inside of water tank by pipeline, solenoid valve four (604) input pipe is connected with hydraulic press (13), and the top of water tank is connected with solenoid valve five (605), and solenoid valve five (605) is connected with solenoid valve six (606) and air compressor (15); Ball valve (7), fixed on the top of water tank, and funnel (10) is connected above ball valve (7); Liquid level gauge (11), fixed in the side of water tank, for the water amount in reaction system; Power supply (12), for supplying power to test pump (9) and feeding monitoring data to control module (14); The output pipe of test pump (9) is connected with solenoid valve eight (608), solenoid valve eight (608) is connected with test pipe, and the output end of test pipe is connected with solenoid valve seven (607) and is communicated with electromagnetic flowmeter (1); Solenoid valve eight (608) is fixedly installed with inlet pipe (16), and installation groove is formed in the side of inlet pipe (16), inlet liquid baffle strip (161) is movably installed in installation groove, and solenoid valve seven (607) is fixedly installed with outlet pipe (17), and outlet liquid baffle strip (171) is arranged on the outside of outlet pipe (17), and the communication pipe (18) is fixedly connected between inlet liquid baffle strip (161) and outlet liquid baffle strip (171); When operator pushes communication pipe (18) and moves along inlet pipe (16) / outlet pipe (17) axially, communication pipe (18) will relatively move away / close to solenoid valve eight (608);When communication pipe (18) moves upward, the medium flowing from solenoid valve eight (608) enters inlet pipe (16), communication pipe (18), detection top rod (19) and solenoid valve seven (607), and the length of medium flow will relatively increase;Similarly, when communication pipe (18) moves downward, the length between communication pipe (18) and solenoid valve eight (608) / solenoid valve seven (607) will be shortened, so the length of medium flow is shortened.

2. The water pump durability test system of claim 1, wherein, The motor (27) is fixedly installed in the inner side of the liquid inlet pipe (16), a driving rod (28) is fixedly installed on the output shaft of the motor, the driving rod (28) is used for driving the outer side of the pitch increasing screw rod (29) to rotate synchronously, a locking top rod (25) is installed on the liquid inlet baffle (161), and the locking top rod (25) is arranged in the threaded groove on the outer side of the pitch increasing screw rod (29).

3. The water pump durability test system of claim 2, wherein, A pressure gauge (20) is fixedly installed at the top of the liquid outlet pipe (17).

4. The water pump durability test system of claim 2, wherein, The pitch increasing screw rod (29) is inserted into the inside of the driving rod (28) through a cylindrical rod, a transposition spring (30) is connected between the cylindrical rod and the inside of the driving rod (28), and a sealing element (34) is fixedly installed in the inner side of the liquid inlet pipe (16).

5. The water pump durability test system of claim 4, wherein, The end of the pitch increasing screw rod (29) is fixedly installed with a threaded cylinder (31), the end of the liquid inlet pipe (16) is movably installed with an unlocking baffle (33), the end of the unlocking baffle (33) is fixedly installed with an adjusting screw rod (32) which is in threaded connection with the threaded cylinder (31), the end of the liquid outlet pipe (17) is movably installed with an adjusting top rod (21), a tension spring is arranged between the adjusting top rod (21) and the liquid inlet pipe (16), the outer side of the adjusting top rod (21) is fixedly installed with a guide rail (22), the liquid inlet baffle (161) is movably installed with an unlocking pull arm (23), the other end of the unlocking pull arm (23) is movably installed on the guide rail (22), an unlocking groove (230) is formed in the side of the unlocking pull arm (23), and the end of the locking top rod (25) is provided with a protruding column and arranged in the unlocking groove (230).

6. The water pump durability test system of claim 5, wherein, The inside of the liquid outlet pipe (17) is movably installed with a switching seat (26), an annular groove is arranged on the outer side of the switching seat (26), a return spring (260) is arranged between the switching seat (26) and the liquid outlet pipe (17), the liquid outlet baffle (171) is movably installed with a detection top rod (19), the top of the detection top rod (19) is movably installed on the outer side of the communication pipe (18), a spring is connected between the communication pipe (18) and the detection top rod (19), and the guide rail (22) is fixedly connected with an unlocking baffle arm (24).

7. The water pump durability test system of claim 6, wherein, An inclined surface is arranged in the middle of the detection top rod (19).

8. The water pump durability test system of claim 1, wherein, The second test pipe is a floor heating pipe (8).

9. A method of testing the durability of a water pump according to any one of claims 1 to 8, characterized in that, The method comprises the following steps: S1, according to the application of the test pump (9) in the actual floor heating system, the length of the test pipe is determined, which is matched with the total length of the pipe in the actual system; according to the preset ratio of the additive and water, the electromagnetic valve four (604) is opened by operation, the water tank in the system is supplemented with water by the hydraulic press (13), and the electromagnetic valve four (604) is closed after the required water amount is reached; S2, the ball valve (7) is manually opened, a specified amount of additive is added into the system through the hopper (10), and then the ball valve (7) is closed to ensure that the additive is uniformly distributed in the water tank; S3, the pressure in the water tank is monitored in real time by the pressure sensor (3), and the data is transmitted to the control module (14); if the water amount of the system reaches 300L, the water tank is pressurized by the hydraulic press (13) until a specified test pressure is reached; if the water amount does not reach 300L, the air compressor (15) is pressurized by the control module (14) instruction, and the same specified test pressure is reached. S4, monitor the temperature in the water tank by the temperature sensor (2), and feed back the data to the control module (14); the control module (14) controls the heating pipe (4) to heat the medium according to the test requirements, until the specified test water temperature is reached; S5, open electromagnetic valve one (601), electromagnetic valve two (602), electromagnetic valve seven (607) and electromagnetic valve eight (608), connect the power supply (12) for the test pump (9), so that it starts to run; according to the test time, the durability and start-stop test of the additive is carried out to evaluate the influence of the additive on the performance of the test pump (9); S6, after the test is completed, the power supply (12) is turned off, and the electromagnetic valve seven (607), electromagnetic valve eight (608), electromagnetic valve one (601) and electromagnetic valve two (602) are closed through the control module (14), and the heating pipe (4) is also closed; if the air compressor (15) is used for pressurization, the electromagnetic valve six (606) is opened for pressure relief through the control module (14), and then the electromagnetic valve three (603) is opened to empty the medium in the system, preparing for the test of the next additive; S7, the time flow, time power and time current curves monitored in real time are derived from the control module (14), which are used for analyzing and evaluating the running stability of the water pump during the whole test.

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