A self-priming pump test bench

Abstract

The present application relates to a kind of self-priming pump test test bench, including adjustable liquid level self-priming pool, self-priming pump to be measured, first steady flow tank, second steady flow tank, liquid level adjusting device, adjustable liquid level self-priming pool is connected with the import of self-priming pump to be measured, and second branch circuit pipeline and third branch circuit pipeline are connected in parallel on the first output pipeline of self-priming pump to be measured, and second branch circuit pipeline and third branch circuit pipeline are connected with first steady flow tank;First steady flow tank and second steady flow tank are connected by several different pipe diameters fourth branch circuit pipeline, and second steady flow tank is connected with liquid level adjusting device by several different flow regulating pipeline, and the two-way import branch circuit pipeline and two-way export branch circuit pipeline of liquid level adjusting device are connected with self-priming pool respectively.The present application can realize the self-priming performance test of different specifications and models of self-priming pump under different self-priming height, and simultaneously using hydraulic performance testing device can complete the hydraulic performance test of self-priming pump.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of water pump testing, and particularly relates to a self-priming pump test bench. BACKGROUND

[0002] As a special centrifugal pump, the self-priming pump has the characteristics of strong adaptability and convenient use, and is widely used in fields such as farmland irrigation and mine drainage. Before the self-priming pump is started for the first time, a certain amount of liquid needs to be added to the pump, and after the pump is started, the air in the inlet pipeline is sucked into the pump body by the rotating action of the impeller, mixed with water, and discharged to the steam-water separation chamber. The gas in the upper part of the steam-water separator is discharged, and the water in the lower part returns to the impeller and is mixed with the remaining air in the inlet pipeline again until all the gas in the pump and the inlet pipeline is discharged, the self-priming process is completed, and the pump starts to work normally. The self-priming time of the self-priming pump at different self-priming heights is an important parameter for evaluating the performance of the self-priming pump, which needs to be obtained through actual test, and the traditional self-priming pump test bench has problems such as that the liquid level of the self-priming pool cannot be automatically adjusted, the number of pump types that can be tested is small, and the test precision is low. SUMMARY

[0003] In view of the deficiencies in the prior art, the purpose of the present application is to provide a self-priming pump test bench to meet the self-priming performance and hydraulic performance test of self-priming pumps of different specifications and models at different self-priming heights.

[0004] The self-priming pump test test bench comprises a self-priming pump to be tested and a self-priming pool, the self-priming pump to be tested is provided with a self-priming pump to be tested output pipeline and a self-priming pump to be tested import pipeline, a second pressure transmitter is installed on the self-priming pump to be tested output pipeline, a first pressure transmitter is installed on the self-priming pump to be tested import pipeline, the self-priming pump to be tested output pipeline is connected with a first steady flow tank, the first steady flow tank is connected with a second steady flow tank through a plurality of parallel fourth branch pipelines, the second steady flow tank is connected with an eighth output pipeline through a plurality of parallel branch pipelines, a sixth pneumatic ball valve is installed on the eighth output pipeline, the eighth output pipeline is parallel with a ninth branch pipeline, a tenth branch pipeline and an auxiliary pump output pipeline, the ninth branch pipeline is installed with a seventh pneumatic ball valve, the tenth branch pipeline is installed with an eighth pneumatic ball valve, a third electric regulating valve is installed on the auxiliary pump output pipeline, the self-priming pool comprises a water storage chamber and an adjusting chamber, a first input liquid level meter is arranged in the water storage chamber, a second input liquid level meter is arranged in the adjusting chamber, the self-priming pump to be tested import pipeline is communicated with the adjusting chamber, the tenth branch pipeline is communicated with the adjusting chamber, the ninth branch pipeline is communicated with the water storage chamber, the auxiliary pump output pipeline is connected with a second auxiliary pump, the second auxiliary pump is connected with an auxiliary pump import pipeline, the auxiliary pump import pipeline is parallel with an eleventh branch pipeline and a twelfth branch pipeline, the eleventh branch pipeline is installed with a ninth pneumatic ball valve, the twelfth branch pipeline is installed with a tenth pneumatic ball valve, the eleventh branch pipeline is communicated with the water storage chamber, and the twelfth branch pipeline is communicated with the adjusting chamber.

[0005] In the scheme, the second branch pipeline and the third branch pipeline are parallel between the self-priming pump to be tested output pipeline and the first steady flow tank, the first pneumatic ball valve is installed on the second branch pipeline, and the second pneumatic ball valve, the first auxiliary pump and the third pneumatic ball valve are sequentially installed on the third branch pipeline.

[0006] In the scheme, the pipe diameters of each fourth branch pipeline are different, and sequentially increase from top to bottom, and the fourth pneumatic ball valve, the electromagnetic flow meter and the fifth pneumatic ball valve are sequentially installed on each fourth branch pipeline.

[0007] In the scheme, the branch pipeline parallel between the second steady flow tank and the eighth output pipeline comprises a fifth branch pipeline, a sixth branch pipeline and a seventh branch pipeline, the first electric regulating valve is installed on the fifth branch pipeline, the electric gate valve is installed on the sixth branch pipeline, and the second electric regulating valve is installed on the seventh branch pipeline.

[0008] In the scheme, the self-priming pump to be tested is located on a hydraulic lifting platform.

[0009] In the scheme, the first auxiliary pump adopts a horizontal centrifugal pump, and the second auxiliary pump adopts a pipeline centrifugal pump.

[0010] In the scheme, the overall height H of the self-suction tank is 11 m, and the sum of the liquid level height H1 of the adjusting chamber and the liquid level height H2 of the storage chamber is less than or equal to 11 m.

[0011] The present application has the following advantages: 1) the self-suction tank is designed as a water storage chamber and an adjusting chamber, and the liquid level can be automatically adjusted on both sides of the self-suction tank by combining with a liquid level adjusting pipeline, so that the self-suction performance test of self-suction pumps of different specifications and models at different self-suction heights can be completed; 2) the high-precision hydraulic performance test of self-suction pumps of different specifications and models can be completed by setting flow collecting pipelines with different pipe diameters and flow adjusting pipelines with different pipe diameters; and 3) compared with the conventional self-suction pump test bench, the test bench can realize the self-suction performance test of self-suction pumps at different self-suction heights without changing the pump installation height. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is a schematic diagram of the test bench of the present application;

[0013] Figure 2 is a schematic diagram of the liquid level adjusting device of the present application;

[0014] Figure 3 is a schematic diagram of the flow adjusting pipeline of the present application;

[0015] Figure 4 is a schematic diagram of the self-suction tank of the present application;

[0016] Figure 5 is a self-suction curve diagram of the pump of the embodiment.

[0017] 1. Suction tank, 1-1. Water storage chamber, 1-2. Adjustment chamber, 2. First immersion liquid level meter, 2-1. Inlet pipeline of self-suction pump to be tested, 3. Second immersion liquid level meter, 3-1. Outlet pipeline of self-suction pump to be tested, 4. Hydraulic lifting platform, 4-1. Second branch pipeline, 4-2. Third branch pipeline, 5. First pressure transmitter, 5-1. Fourth branch pipeline, 6. Self-suction pump to be tested, 6-1. Fifth branch pipeline, 6-2. Sixth branch pipeline, 6-3. Seventh branch pipeline, 7. Second pressure transmitter, 7-1. Eighth output pipeline, 8. First pneumatic ball valve, 8-1. Ninth branch pipeline, 8-2. Tenth branch pipeline, 8-3. Auxiliary pump output pipeline, 8-4. Auxiliary pump inlet pipeline, 8-5. Eleventh branch pipeline, 8-6. Twelfth branch pipeline, 9. Second pneumatic ball valve, 10. First auxiliary pump, 11. Third pneumatic ball valve, 12. First steady flow tank, 13. Fourth pneumatic ball valve, 14. Electromagnetic flowmeter, 15. Fifth pneumatic ball valve, 16. Second steady flow tank, 17. First electric regulating valve, 18. First electric gate valve, 19. Second electric regulating valve, 20. Sixth pneumatic ball valve, 21. Seventh pneumatic ball valve, 22. Eighth pneumatic ball valve, 23. Third electric regulating valve, 24. Second auxiliary pump, 25. Ninth pneumatic ball valve, 26. Tenth pneumatic ball valve. DETAILED DESCRIPTION

[0018] The technical solutions of the present application will be described in more detail below with reference to the drawings.

[0019] As Figure 1As shown, this embodiment of a self-priming pump test bench includes a self-priming pump 6 to be tested, a hydraulic lifting platform 4, an adjustable level self-priming tank 1, a first auxiliary pump 10, a first flow stabilizer 12, a second flow stabilizer 16, and a second auxiliary pump 24. The self-priming pump 6 to be tested is placed on the hydraulic lifting platform 4, and its installation position can be vertically adjusted. The inlet flange of the self-priming pump 6 to be tested is connected to an L-shaped inlet pipe 2-1, which is connected to a top flange of the self-priming tank 1. Flanges of different diameters are installed on the top cover plate of the self-priming tank 1, and a pipe extending into the bottom of the self-priming tank 1 is installed at one end of each flange. The first pressure transmitter 5 is installed on the horizontal section of the inlet pipe 2-1 of the L-shaped self-priming pump under test, at a distance of twice the pipe diameter from the inlet of the self-priming pump under test; the second pressure transmitter 7 is installed on the vertical section of the outlet pipe 3-1 of the self-priming pump under test, at a distance of twice the pipe diameter from the outlet of the self-priming pump under test; a second branch pipe 4-1 and a third branch pipe 4-2 are connected in parallel to the outlet pipe 3-1 of the self-priming pump under test, a first pneumatic ball valve 8 is installed on the second branch pipe 4-1, and a second pneumatic ball valve 8 is installed sequentially on the third branch pipe 4-2. The system includes a pneumatic ball valve 9, a first auxiliary pump 10, and a third pneumatic ball valve 11; the second branch pipeline 4-1 and the third branch pipeline 4-2 are both connected to the first flow stabilizing tank 12; the first flow stabilizing tank 12 and the second flow stabilizing tank 16 are connected by five fourth branch pipelines 5-1 of different diameters. Each fourth branch pipeline 5-1 is sequentially equipped with a fourth pneumatic ball valve 131, an electromagnetic flowmeter 141, and a fifth pneumatic ball valve 151, with the diameter of the fourth branch pipelines 5-1 increasing from top to bottom. The five fourth branch pipelines 5-1 constitute the flow acquisition pipeline for the self-priming pump under test. The first auxiliary pump 10 is a horizontal centrifugal pump, which can be turned on when the head of the self-priming pump 6 under test is less than 5m; the second auxiliary pump 24 is a pipeline centrifugal pump.

[0020] like Figure 2 As shown, a fifth branch pipe 6-1, a sixth branch pipe 6-2, and a seventh branch pipe 6-3 are connected in parallel between the outlet pipe of the second flow stabilizer 16 and the eighth output pipe 7-1. A first electric regulating valve 17 is installed on the fifth branch pipe 6-1, an electric gate valve 18 is installed on the sixth branch pipe 6-2, and a second electric regulating valve 19 is installed on the seventh branch pipe 6-3. The diameter of the fifth branch pipe 6-1 is DN65, the diameter of the sixth branch pipe 6-2 is DN125, and the diameter of the seventh branch pipe 6-3 is DN15. The fifth branch pipe 6-1, the sixth branch pipe 6-2, and the seventh branch pipe 6-3 constitute the flow regulating pipeline of the self-priming pump under test.

[0021] like Figure 3The second steady flow tank 16 is connected with the eighth output pipeline 7-1 through a flow regulating pipeline, the sixth pneumatic ball valve 20 is installed on the eighth output pipeline 7-1, the ninth branch pipeline 8-1, the tenth branch pipeline 8-2 and the auxiliary pump output pipeline 8-3 are connected with the eighth output pipeline 7-1 in parallel, the seventh pneumatic ball valve 21 is installed on the ninth branch pipeline 8-1, the eighth pneumatic ball valve 22 is installed on the tenth branch pipeline 8-2, and the third electric regulating valve 23 is installed on the auxiliary pump output pipeline 8-3; the self-suction tank 1 is divided into left and right parts, and the middle part is separated by a special steel plate, one side is called the water storage chamber 1-1, and the other side is called the adjusting chamber 1-2, (the adjusting chamber and the water storage chamber are not specified on one side of the water tank, and the installation position of the self-suction pump to be tested is determined, when the self-suction pump to be tested is installed on the left side, the left side is the adjusting chamber, and the right side is the water storage chamber, when the self-suction pump to be tested is installed on the right side, the right side is the adjusting chamber, and the left side is the water storage chamber). The self-suction tank 1 only needs to be filled with water on one side when used for the first time; the first drop-in liquid level meter 2 is arranged in the water storage chamber 1-1, and the second drop-in liquid level meter 3 is arranged in the adjusting chamber 1-2, for monitoring the liquid levels of the two sides of the water tank in real time. The tenth branch pipeline 8-2 is connected with the adjusting chamber 1-2, the ninth branch pipeline 8-1 is connected with the water storage chamber 1-1, the auxiliary pump output pipeline 8-3 is connected with the second auxiliary pump 24, the second auxiliary pump 24 is connected with the auxiliary pump inlet pipeline 8-4, the eleventh branch pipeline 8-5 and the twelfth branch pipeline 8-6 are connected with the auxiliary pump inlet pipeline 8-4 in parallel, the ninth pneumatic ball valve 25 is installed on the eleventh branch pipeline 8-5, the tenth pneumatic ball valve 26 is installed on the twelfth branch pipeline 8-6, the eleventh branch pipeline 8-5 is connected with the water storage chamber 1-1, and the twelfth branch pipeline 8-6 is connected with the adjusting chamber 1-2.

[0022] As shown in the accompanying drawings, Figure 4 As shown in the accompanying drawings, The total height H of the self-suction tank 1 is 11 m, the sum of the liquid level height H1 of the left adjusting chamber and the liquid level height H2 of the right liquid storage chamber is less than or equal to 11 m, H3 is the vertical distance from the center of the self-suction pump 6 to the top of the self-suction tank, and the calculation formula of the self-suction height Hz of the self-suction pump 6 in the actual test process is H z =H-H1+H3.

[0023] The embodiment provides a test method of the adjustable liquid level self-suction test bench, mainly including a liquid level adjusting method and a self-suction pump hydraulic performance test method, and the test method mainly includes the following steps:

[0024] S1: Preparation before the test: First check the sealing of the inlet and outlet pipeline connection of the self-priming pump to be tested, check the liquid level of the storage chamber and the adjusting chamber, then open the air pump, open the test power supply, and open the frequency conversion cabinet.

[0025] S2: Adjust the liquid level of the self-priming tank: Before each test, the liquid level of the adjusting chamber and the storage chamber should be adjusted according to the self-priming height Hz required by the self-priming pump test. In this example, the inlet pipeline 2-1 of the self-priming pump to be tested is installed on the top left side of the self-priming tank 1 (i.e. the left side adjusting chamber 1-2 of the self-priming tank needs to be adjusted), to illustrate the operation method of liquid level adjustment. When the liquid level H1 of the adjusting chamber 1-2 is less than the target liquid level H m , open the ninth pneumatic ball valve 25 of the eleventh branch pipeline 8-5, open the eighth pneumatic ball valve 22 on the tenth branch pipeline 8-2; in addition, close the seventh pneumatic ball valve 21 on the ninth branch pipeline 8-1, close the tenth pneumatic ball valve 26 on the twelfth branch pipeline 8-6, close the sixth pneumatic ball valve 20 on the eighth output pipeline 7-1, and set the valve opening of the third electric regulating valve 23 on the auxiliary pump 24 output pipeline 8-3, then start the second auxiliary pump 24 until the liquid level height H1 of the left side adjusting chamber 1-2 reaches the target liquid level H m , close the second auxiliary pump 24, and close the pneumatic ball valves and the third electric regulating valve 23 in each liquid level adjusting pipeline; when the liquid level height H1 of the left side adjusting chamber 1-2 is greater than the target liquid level H m , open the tenth pneumatic ball valve 26 on the twelfth branch pipeline 8-6, open the seventh pneumatic ball valve 21 on the ninth branch pipeline 8-1, close the ninth pneumatic ball valve 25 on the eleventh branch pipeline 8-5, close the eighth pneumatic ball valve 22 on the tenth branch pipeline 8-2, close the sixth pneumatic ball valve 20 on the eighth output pipeline 7-1, set the valve opening of the third electric regulating valve 23 on the auxiliary pump 24 output pipeline 8-3, start the second auxiliary pump 24 until the liquid level of the adjusting chamber 1-2 meets the test requirements, close the valves on each pipeline, and complete the liquid level adjustment of the self-priming tank 1.

[0026] S3: The test flow of self-priming pump hydraulic performance: When the self-priming pump 6 is tested for the first time, a sufficient amount of clean water is added to the pump cavity through the self-priming pump water injection plug, the self-priming pump exhaust valve is opened, the self-priming pump is started, and the time t1 when the self-priming pump starts continuous operation is recorded (the time can be recorded by a stopwatch). When the self-priming pump continuously discharges water, the self-priming pump starts normal work, and the time t2 is recorded. The pump exhaust valve is closed, and the self-priming pump under test is closed. The self-priming time of the pump under test is t = t2-t1. After 1-2 minutes of shutdown, the hydraulic performance test of the self-priming pump under test can be started. Before testing, the valves on each pipeline need to be opened. In this test, the second branch pipeline 4-1 is selected, the first pneumatic ball valve 8 is opened, one of the flow collection pipelines is selected according to the specifications and models of the pump under test, the pneumatic ball valves before and after the electromagnetic flowmeter are opened, the valve opening of the first electric regulating valve 17 on the fifth branch pipeline 6-1 is set to 50%, the sixth pneumatic ball valve 20 on the eighth output pipeline 7-1 is opened, the eighth pneumatic ball valve 22 on the tenth branch pipeline 8-2 is opened, and the other valves are closed. The self-priming pump 6 is started again, and the hydraulic performance test of the self-priming pump 6 under test can be started. By adjusting the valve openings of the fifth branch pipeline 6-1, the sixth branch pipeline 6-2, and the seventh branch pipeline 6-3 in the flow regulating pipeline, the performance parameters of the pump under test under different flow conditions can be collected, including inlet and outlet pressure, flow, speed, voltage, current, input power, power factor, and other test data, to complete the hydraulic performance test of the self-priming pump.

[0027] S4: By adjusting the liquid level of the adjusting chamber 1-2 in the self-priming tank 1 in steps S3 and S4, the self-priming performance and hydraulic performance test of the self-priming pump under test at different self-priming heights can be completed (note: after adjusting the liquid level of the self-priming tank each time, the exhaust valve of the inlet pipeline is opened to communicate the inlet pipeline with the atmosphere), and the self-priming performance curve of the self-priming pump under test is drawn.

[0028] A self-priming sewage pump is taken as an example to further illustrate the test method. The self-priming pump model is 65ZW10-16, and the rated flow is 40m 3The rated head is 16 m, the designed self-suction height is 6 m, the rated rotating speed is 3000 r / min, and the inlet and outlet pipe diameters are 50 mm. In the actual test, the self-suction pump inlet pipeline 2-1 is installed in the left adjusting chamber 1-2, the auxiliary pipeline selects the second branch pipeline 4-1, the electromagnetic flowmeter pipeline selects the DN50 pipeline on the fourth branch pipeline 5-1 for flow measurement, the inlet pressure gauge 5 selects the range of ±0.1 MPa, and the outlet pressure gauge 7 selects the range of 0.4 MPa; the self-suction time of the self-suction pump under the self-suction heights of 1 m, 2 m, 3 m, 4 m, 5 m, 6 m, 7 m and 8 m is tested, and the corresponding self-suction performance curve is drawn. The specific steps are as follows:

[0029] S1: First, test the self-suction time of the self-suction pump when the self-suction height is 1 m, adjust the liquid level height of the left adjusting chamber 1-2 in the self-suction tank 1, wherein the designed depth H of the self-suction tank 1 is 11 m, the vertical distance H3 between the top of the self-suction tank 1 and the inlet flange of the measured self-suction pump 6 is 0.92 m, and the target liquid level H m of the left adjusting chamber 1-2 of the self-suction tank 1 is calculated as 10.92 m according to H z =H-H 3， . m

[0030] S2: First, adjust the liquid level of the adjusting chamber 1-2 to 10.92 m. The method is as follows: read the values of the first input liquid level meter 2 as 5.2 m and the second input liquid level meter 3 as 5.8 m, then the liquid level of the left adjusting chamber 1-2 of the self-suction tank 1 is 5.8 m, the liquid level of the right storage chamber 1-1 of the self-suction tank 1 is 5 m, and the liquid level of the left adjusting chamber 1-2 is less than the target liquid level H m , so the water in the right storage chamber 1-1 needs to be introduced into the left adjusting chamber 1-2 through the second auxiliary pump 24. The specific operation method is as follows: close the sixth pneumatic ball valve on the eighth output pipeline 7-1, close the seventh pneumatic ball valve 21 on the ninth branch pipeline 8-1 and the tenth pneumatic ball valve 26 on the twelfth branch pipeline 8-6; at the same time, open the eighth pneumatic ball valve 22 on the tenth branch pipeline 8-2, open the ninth pneumatic ball valve 25 on the eleventh branch pipeline 8-5, set the valve opening degree of the third electric regulating valve 23 of the output pipeline 8-3 of the second auxiliary pump 24, start the second auxiliary pump 24, and close the second auxiliary pump 24 and the eighth pneumatic ball valve 22, the third electric regulating valve 23 and the ninth pneumatic ball valve 25 until the liquid level of the left adjusting chamber 1-2 reaches 10.92 m.

[0031] ​S3: self-suction performance test, when the self-suction pump 6 is tested for the first time, sufficient clean water needs to be added to the self-suction pump, and then the test is started. First, open the first pneumatic ball valve 8 in the second branch pipeline 4-1, select the DN50 flow test pipeline in the fourth branch pipeline 5-1 for flow measurement, open the fourth pneumatic ball valve 131 and the fifth pneumatic ball valve 141 in the DN50 pipeline, set the valve opening degree of the second electric regulating valve 19 on the seventh branch pipeline 6-3 to 50%, open the sixth pneumatic ball valve 20 on the eighth output pipeline 7-1, open the eighth pneumatic ball valve 22 on the tenth branch pipeline 8-2, close the remaining valves, start the self-suction pump 6, and use a stopwatch to record the start time t1, then record the time t2 when the self-suction pump pumps out water, then the self-suction time of the self-suction pump at a self-suction height of 3m is t=t2-t1, after 1-2min of shutdown, start the self-suction pump again for hydraulic performance test.

[0032] S4: when the hydraulic performance test is performed, only the valve opening degrees of the fifth branch pipeline 6-1, the sixth branch pipeline 6-2, and the seventh branch pipeline 6-3 in the flow regulating pipeline need to be adjusted on the basis of S3, so that the hydraulic performance test of the self-suction pump under full flow can be performed, and usually 10-13 test points are taken, and each flow point needs to include the collected flow, inlet pressure, outlet pressure, rotating speed, voltage, current, frequency, power, power factor, and other parameters, wherein the head, unit efficiency, and shaft power are calculated according to the collected data, after the hydraulic performance test is completed, the valves on each pipeline are closed, the self-suction pump under test is closed, and the power supply is disconnected.

[0033] S5: refer to methods S2-S4, and the self-suction time and hydraulic performance test of the self-suction pump at a self-suction height of 2m, 3m, 4m, 5m, 6m, 7m, and 8m are sequentially performed, and the self-suction pump 6 at a self-suction height of 2m is taken as an example for further illustration. When the required self-suction height H z of the self-suction pump 6 is equal to 2m, according to H m =H-H z +H3, the target liquid level H m is calculated to be 9.92m, the left adjusting chamber 1-2 liquid level H1 is equal to 10.92m, and H1>H m, the water in the left adjusting chamber 1-2 needs to be introduced into the right water storage chamber 1-1. The specific operation method is as follows: open the seventh pneumatic ball valve 21 on the ninth branch pipeline 8-1, open the tenth pneumatic ball valve 26 on the twelfth branch pipeline 8-6, set the valve opening degree of the third electric regulating valve 23 on the output pipeline 8-3 of the second auxiliary pump 24, at the same time, close the sixth pneumatic ball valve 20 on the eighth output pipeline 7-1, close the eighth pneumatic ball valve 22 on the tenth branch pipeline 8-2 and the ninth pneumatic ball valve 25 on the eleventh branch pipeline 8-5, start the second auxiliary pump 24, adjust the liquid level of the left adjusting chamber 1-2 to 9.92m, close the second auxiliary pump, the seventh pneumatic ball valve 21, the third electric regulating valve 23 and the tenth pneumatic ball valve 26. After the liquid level adjustment is completed, open the inlet pipeline exhaust valve, so that the inlet pipeline recovers from the vacuum state to the atmospheric pressure state, the self-suction time test and the hydraulic performance test parameters are carried out according to methods S3 and S4, and the liquid level adjustment method at the self-suction height is referred to the adjustment at the self-suction height of 2m. The self-suction performance curve of 65ZW10-16 is shown in Figure 5

[0034] The above-described embodiments are only preferred examples of the present application and do not limit the whole content of the present application. Although the present application is limited to detailed description with reference to the foregoing embodiments, a person skilled in the art can modify and replace the form according to the technical solutions described in the foregoing embodiments. Any form modification, equivalent replacement and the like within the scope of the present application should be included in the protection of the present application.​

Claims

1. A self-priming pump test test bench, comprising a self-priming pump (6) to be tested and a self-priming pool (1), wherein the self-priming pump (6) to be tested is provided with a self-priming pump output pipeline (3-1) and a self-priming pump inlet pipeline (2-1), a second pressure transmitter (7) is installed on the self-priming pump output pipeline (3-1), and a first pressure transmitter (5) is installed on the self-priming pump inlet pipeline (2-1), characterized in that, The output pipeline (3-1) of the self-priming pump to be tested is connected with the first steady flow tank (12), the first steady flow tank (12) is connected with the second steady flow tank (16) through a plurality of parallel fourth branch pipelines (5-1), the second steady flow tank (16) is connected with the eighth output pipeline (7-1) through a plurality of parallel branch pipelines, the sixth pneumatic ball valve (20) is installed on the eighth output pipeline (7-1), the ninth branch pipeline (8-1), the tenth branch pipeline (8-2) and the auxiliary pump output pipeline (8-3) are connected in parallel on the eighth output pipeline (7-1), the seventh pneumatic ball valve (21) is installed on the ninth branch pipeline (8-1), the eighth pneumatic ball valve (22) is installed on the tenth branch pipeline (8-2), the third electric regulating valve (23) is installed on the auxiliary pump output pipeline (8-3), the self-priming tank (1) comprises a water storage chamber (1-1) and an adjusting chamber (1-2), the first drop-in liquid level meter (2) is arranged in the water storage chamber (1-1), the second drop-in liquid level meter (3) is arranged in the adjusting chamber (1-2), the inlet pipeline (2-1) of the self-priming pump to be tested is communicated with the adjusting chamber (1-2), the tenth branch pipeline (8-2) is communicated with the adjusting chamber (1-2), the ninth branch pipeline (8-1) is communicated with the water storage chamber (1-1), the auxiliary pump output pipeline (8-3) is connected with the second auxiliary pump (24), the second auxiliary pump (24) is connected with the auxiliary pump inlet pipeline (8-4), the eleventh branch pipeline (8-5) and the twelfth branch pipeline (8-6) are connected in parallel on the auxiliary pump inlet pipeline (8-4), the ninth pneumatic ball valve (25) is installed on the eleventh branch pipeline (8-5), the tenth pneumatic ball valve (26) is installed on the twelfth branch pipeline (8-6), the eleventh branch pipeline (8-5) is communicated with the water storage chamber (1-1), and the twelfth branch pipeline (8-6) is communicated with the adjusting chamber (1-2).

2. A self-priming pump test bench according to claim 1, characterized in that, The second branch pipeline (4-1) and the third branch pipeline (4-2) are connected in parallel between the output pipeline (3-1) of the self-priming pump to be tested and the first steady flow tank (12), the first pneumatic ball valve (8) is installed on the second branch pipeline (4-1), and the second pneumatic ball valve (9), the first auxiliary pump (10) and the third pneumatic ball valve (11) are sequentially installed on the third branch pipeline (4-2).

3. A self-priming pump test bench according to claim 1, characterized in that, The pipe diameters of each fourth branch pipeline (5-1) are different, and increase from top to bottom, and the fourth pneumatic ball valve (131), the electromagnetic flowmeter (141) and the fifth pneumatic ball valve (151) are sequentially installed on each fourth branch pipeline (5-1).

4. A self-priming pump test bench according to claim 1, characterized in that, The branch pipeline connected in parallel between the second steady flow tank (16) and the eighth output pipeline (7-1) comprises a fifth branch pipeline (6-1), a sixth branch pipeline (6-2) and a seventh branch pipeline (6-3), the first electric regulating valve (17) is installed on the fifth branch pipeline (6-1), the electric gate valve (18) is installed on the sixth branch pipeline (6-2), and the second electric regulating valve (19) is installed on the seventh branch pipeline (6-3).

5. A self-priming pump test bench according to claim 1, characterized in that, The self-priming pump (6) to be tested is located on the hydraulic lifting platform (4).

6. A self-priming pump test bench according to claim 2, characterized in that, The first auxiliary pump (10) is a horizontal centrifugal pump, and the second auxiliary pump (24) is a pipeline centrifugal pump.

7. A self-priming pump test bench according to claim 1, characterized in that, The overall height of the self-priming pool (1) is 10 m, and the sum of the liquid level height H1 of the adjusting chamber (1-2) and the liquid level height H2 of the water storage chamber (1-1) is less than or equal to 10 m.

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