Self-circulating submersible pump test device

Abstract

A self-circulating submersible pump test device comprises: a water tank with a closed inner cavity; a plurality of submersible pump components, each submersible pump component comprises a submersible pump, a pump outlet pipe and an outlet pipe valve; the submersible pump is arranged in the inner cavity, the outlet of the submersible pump is connected with the inlet end of the pump outlet pipe, the pipe body of the pump outlet pipe is located outside the water tank, the outlet end of the pump outlet pipe extends into the inner cavity of the water tank, and the outlet pipe valve is arranged on the pipe body of the pump outlet pipe; a heat exchanger component comprises a heat exchanger, a water pump, a heat exchanger inlet pipe and a heat exchanger outlet pipe; the heat exchanger is arranged outside the water tank, the inlet ends of the water pump and the heat exchanger inlet pipe are respectively located in the inner cavity, the outlet of the water pump is connected with the inlet of the heat exchanger inlet pipe, the outlet of the heat exchanger inlet pipe is connected with the hot side inlet of the heat exchanger, the hot side outlet of the heat exchanger is connected with the inlet of the heat exchanger outlet pipe, and the outlet end of the heat exchanger outlet pipe extends into the inner cavity. The present invention occupies a small space, has a low temperature during testing, and does not leak water or water vapor.

Description

Technical Field

[0001] The invention relates to pump technology, in particular to a heat dissipation testing device for a submersible pump. Background Art

[0002] Submersible pumps are important equipment for deep well water extraction. When in use, the entire submersible pump unit dives into the water to extract groundwater to the surface. It can be used in many fields such as domestic water use, mine rescue, industrial cooling, farmland irrigation, seawater lifting, ship loading and fountain landscaping.

[0003] At present, there are many inconveniences in the testing of submersible pumps. The main problems exist in the following aspects: first, the test conditions require that the pump body be placed on the bottom of the water, which requires that the test site must have a deep water pool for a long time, which takes up a lot of factory space; second, the submersible pump will heat up seriously during the test, which will generate a lot of heat and water vapor, polluting the factory environment and increasing production safety hazards; third, in the maintenance and replacement of test tools, the water in the deep water pool will deteriorate and stink after long-term use, and it is extremely inconvenient to drain and replace several tons of water. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a self-circulating submersible pump testing device which occupies a small space, has a low temperature during testing, does not leak water or water vapor, has good safety in use, and is easy to maintain.

[0005] A self-circulating submersible pump testing device according to an embodiment of the present invention comprises: a water tank having a closed inner cavity; a plurality of submersible pump assemblies, each of which comprises a submersible pump, a pump outlet pipe and an outlet pipe valve; the submersible pump is arranged in the inner cavity of the water tank, the outlet of the submersible pump is connected with the inlet end of the pump outlet pipe, the pipe body of the pump outlet pipe is located outside the inner cavity of the water tank, the outlet end of the pump outlet pipe extends into the upper part of the inner cavity of the water tank, and the outlet pipe valve is arranged on the pipe body of the pump outlet pipe; a heat exchanger assembly, the heat exchanger assembly comprises a heat exchanger, a water pump, a heat exchanger The heat exchanger is arranged outside the inner cavity of the water tank, the inlet ends of the water pump and the heat exchanger water inlet pipe are respectively located in the inner cavity of the water tank, the outlet of the water pump is communicated with the inlet end of the heat exchanger water inlet pipe, the outlet end of the heat exchanger water inlet pipe is communicated with the hot side inlet of the heat exchanger, the hot side outlet of the heat exchanger is communicated with the inlet end of the heat exchanger water outlet pipe, and the outlet end of the heat exchanger water outlet pipe extends into the inner cavity of the water tank; a control junction box is installed on the outer surface of the water tank, and is respectively connected with the electrical interfaces of several groups of submersible pumps through electrical wiring harnesses.

[0006] The embodiments of the present invention have at least the following advantages:

[0007] 1. Each submersible pump assembly of the embodiment of the present invention includes a submersible pump and a pump outlet pipe. During the test, the frequency converter input controls the submersible pump to pump water in the water tank to the pump outlet pipe and discharge it back into the water tank, forming a water self-circulation, so there is no need to set up a water pool in the factory, which solves the problem of the existing submersible pump testing method occupying factory space due to the long-term setting of the water pool;

[0008] 2. Each submersible pump assembly of the embodiment of the present invention is provided with a water outlet valve for controlling the water outlet resistance. By adjusting the opening of the water outlet valve, various loads of the test device can be formed with submersible pumps of different powers. When multiple groups of submersible pumps of different powers are arranged in the water tank, the test requirements of submersible pumps of various power ranges can be met;

[0009] 3. The inner cavity of the water tank is set to be closed, which can prevent the water and water vapor in the water tank from leaking and polluting the factory environment, and also improve the safety of use;

[0010] 4. The water tank and heat exchanger assembly of the embodiment of the present invention form a self-circulating heat dissipation, which solves the problem of excessive temperature during testing and water vapor generation after excessive temperature rise. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A schematic diagram of the internal structure of a self-circulating submersible pump testing device according to an embodiment of the present invention is shown.

[0012] Figure 2 A schematic diagram of the appearance of a self-circulating submersible pump testing device according to an embodiment of the present invention is shown.

[0013] Figure 3 A wiring diagram of an electrical wiring harness connecting a control junction box and a submersible pump according to an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0014] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0015] Please refer to Figure 1 and Figure 2 The self-circulating submersible pump testing device according to the embodiment of the present invention comprises a water tank 1 , a plurality of submersible pump components, a heat exchanger component, a control junction box 4 and a drain pipe 5 .

[0016] The water tank 1 has a closed inner cavity 10. In this embodiment, the water tank 1 includes an upper cover 11 and a box body 12. The upper cover 11 covers the mouth of the box body 12 and is connected to the box body 12 by sponge adhesive, so that the upper cover 11 and the box body 12 are sealed and jointly define the closed inner cavity 10 to prevent water and water vapor in the inner cavity 10 from leaking out.

[0017] Furthermore, a universal wheel 13 is provided at the bottom of the water tank 1, and a handle 14 is provided on the outer side of the water tank 1. The universal wheel 13 has a brake pad, which facilitates the transportation of the test device and allows for flexible layout of the plant.

[0018] Each submersible pump assembly includes a submersible pump 21, a pump outlet pipe 22 and an outlet pipe valve 23. The submersible pump 21 is arranged in the inner cavity 10 of the water tank 1, the outlet of the submersible pump 21 is connected with the inlet end 22a of the pump outlet pipe 22 extending into the inner cavity 10, the pipe body 22b of the pump outlet pipe 22 is located outside the inner cavity 10 of the water tank 1, the outlet end 22c of the pump outlet pipe 22 extends into the upper part of the inner cavity 10 of the water tank, and the outlet pipe valve 23 is arranged on the pipe body 22b of the pump outlet pipe. The submersible pump 21 and the outlet pipe valve 23 work together to form a test load. The outlet pipe valve 23 can adjust the water pressure in the pump outlet pipe 22, that is, adjust the load. When the submersible pump is tested, water is pumped from the inner cavity 10 of the water tank 1 and then discharged into the inner cavity 10 of the water tank 1 through the pump outlet pipe 22, forming a self-circulation.

[0019] The aforementioned "several groups" means one or more groups. In this embodiment, 6 groups of submersible pumps of different powers are installed in the inner cavity of the water tank 1, which is compatible with the test of submersible pumps of all power ranges.

[0020] The heat exchanger assembly includes a heat exchanger 31, a water pump 32, a heat exchanger water inlet pipe 33 and a heat exchanger water outlet pipe 34. The heat exchanger 31 is arranged outside the inner cavity 10 of the water tank 1, and the inlet ends of the water pump 32 and the heat exchanger water inlet pipe 33 are respectively located in the inner cavity 10 of the water tank 1, the outlet of the water pump 32 is connected to the inlet end of the heat exchanger water inlet pipe 33, the outlet end of the heat exchanger water inlet pipe 33 is connected to the hot side inlet of the heat exchanger 31, the hot side outlet of the heat exchanger 31 is connected to the inlet end of the heat exchanger water outlet pipe 34, and the outlet end of the heat exchanger water outlet pipe 34 extends into the inner cavity 10 of the water tank 1.

[0021] During the submersible pump test, the submersible pump load will generate heat and cause adverse phenomena such as high temperature and water vapor. The water pump 32 draws the hot water in the inner cavity of the water tank into the heat exchanger 31 for cooling, and the heat exchanger outlet pipe 34 discharges the water cooled by the heat exchanger back into the inner cavity 10 of the water tank 1.

[0022] In this embodiment, the heat exchanger 31 is installed on the outer surface of the water tank 1. The heat exchanger 31 is a wind-water heat exchanger.

[0023] The control junction box 4 is installed on the outer surface of the water tank 1 and is connected to the electrical interfaces (not shown in the figure) of several groups of submersible pumps 21 through electrical harnesses. The control junction box 4 is equipped with an air switch, a relay and an indicator light. The input end of the control junction box 4 is connected to the frequency converter (not shown in the figure) as the test object, and the output of the control junction box 4 is connected to the 6 groups of submersible pumps in the water tank 1 to control the start and stop of each submersible pump during the test.

[0024] The drain pipe 5 is arranged at the bottom of the box body 12, the inlet of the drain pipe 5 is connected with the inner cavity 10 of the water tank 1, and a drain valve 51 is arranged on the drain pipe 5. The drain pipe 5 is used to drain water when the test device is in use or stagnant use, thereby facilitating the replacement of water in the water tank and making maintenance more convenient.

[0025] Please refer to Figure 3 In this embodiment, a hollow interlayer 16 is provided on one of the side walls 1b of the water tank 1. A first opening 161 is provided above the inner surface (the side close to the inner cavity 10) of the hollow interlayer 16. A second opening 162 is provided on the outer surface of the hollow interlayer 16. The first opening 161 is higher than the highest liquid level of the water tank 1. The water in the water tank 1 will not overflow from the first opening 161. The second opening 162 is located below the first opening 161.

[0026] The control junction box 4 is installed on the outer surface of one of the side walls 1b, one end of the electrical harness 6 is connected to the electrical interface of the junction box arranged on the bottom surface of the control junction box 4, the electrical harness 6 passes through the second opening 162 and the first opening 161 in turn and extends into the inner cavity 10 of the water tank 1, and the other end of the electrical harness 6 is respectively connected to the electrical interfaces of several groups of submersible pumps 21. With the above structure, even if the water tank 1 shakes, the water in the water tank 1 will not directly enter the control junction box 4, thereby avoiding the need to add a waterproof connector at the wiring hole. In addition, hiding the electrical harness 6 in the hollow interlayer can also make the wiring beautiful.

[0027] In this embodiment, the cables of the six groups of submersible pumps are bundled by welding wire ties inside the water tank.

[0028] Furthermore, the water tank 1 is entirely made of sheet metal, which is easy to maintain.

[0029] The submersible pump assembly of the embodiment of the present invention forms a self-circulation of load water, and the heat exchanger assembly forms a self-circulation of heat dissipation water, which solves the problem of large space occupation and high temperature during testing in the existing submersible pump testing method. By integrating the water tank, submersible pump assembly, heat exchanger assembly, control junction box, etc., it is convenient to transport and maintain the entire test device in the factory. In addition, the test device of the embodiment of the present invention is compatible with loads of different power sizes, which improves the test efficiency.

[0030] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A self-circulating submersible pump testing device, characterized in that: include: a water tank having a closed inner cavity; Several groups of submersible pump assemblies, each of which includes a submersible pump, a pump outlet pipe, and a water outlet pipe valve; the submersible pump is disposed in the inner cavity of the water tank, the outlet of the submersible pump is communicated with the inlet end of the pump outlet pipe, the body of the pump outlet pipe is located outside the inner cavity of the water tank, the outlet end of the pump outlet pipe extends into the upper part of the inner cavity of the water tank, and the water outlet pipe valve is disposed on the body of the pump outlet pipe for adjusting the water pressure in the pump outlet pipe; A heat exchanger assembly, the heat exchanger assembly comprising a heat exchanger, a water pump, a heat exchanger water inlet pipe, and a heat exchanger water outlet pipe; the heat exchanger is disposed outside the inner cavity of the water tank, the water pump and the inlet ends of the heat exchanger water inlet pipe are respectively located in the inner cavity of the water tank, the outlet of the water pump is communicated with the inlet end of the heat exchanger water inlet pipe, the outlet end of the heat exchanger water inlet pipe is communicated with the hot side inlet of the heat exchanger, the hot side outlet of the heat exchanger is communicated with the inlet end of the heat exchanger water outlet pipe, and the outlet end of the heat exchanger water outlet pipe extends into the inner cavity of the water tank; A control junction box is mounted on the outer surface of the water tank and is connected to the electrical interfaces of the plurality of submersible pumps through electrical wiring harnesses; One of the side walls of the water tank is provided with a hollow interlayer, a first opening is provided above the inner surface of the hollow interlayer, and a second opening is provided on the outer surface of the hollow interlayer, the first opening is higher than the highest liquid level of the water tank, and the second opening is located below the first opening; The control junction box is installed on the outer surface of one of the side walls, one end of the electrical wiring harness is connected to the junction box electrical interface set on the bottom surface of the control junction box, the electrical wiring harness passes through the second opening and the first opening in sequence and extends into the inner cavity of the water tank, and the other end of the electrical wiring harness is respectively connected to the electrical interfaces of several groups of submersible pumps.

2. The self-circulating submersible pump testing device according to claim 1, characterized in that: The heat exchanger is a wind-water heat exchanger.

3. The self-circulating submersible pump testing device according to claim 1 or 2, characterized in that: The heat exchanger is installed on the outer side of the water tank.

4. The self-circulating submersible pump testing device according to claim 1, characterized in that: The self-circulating submersible pump testing device comprises a drain pipe, the inlet of the drain pipe is communicated with the inner cavity of the water tank, and a drain valve is provided on the drain pipe.

5. The self-circulating submersible pump testing device according to claim 1, characterized in that: The water tank comprises an upper cover and a tank body, wherein the upper cover covers the opening of the tank body and is sealed with the tank body, and the upper cover and the tank body jointly define the inner cavity.

6. The self-circulating submersible pump testing device according to claim 1, characterized in that: Universal wheels are provided at the bottom of the water tank.

7. The self-circulating submersible pump testing device according to claim 1, characterized in that: A handle is provided on the outer side of the water tank.

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