Slurry testing device of submersible slurry pump

Abstract

The utility model discloses a submersible slurry pump slurry test device, comprising a main body structure comprising a base plate, a support cylinder arranged on the base plate, a support frame arranged on the support cylinder and a mounting frame arranged on the support frame, the base plate and the support cylinder forming a slurry pool for accommodating slurry with a preset depth, the mounting frame is connected with a water supplementing pipe and a grouting pipe so as to prepare slurry with preset density and is used for mounting a target submersible slurry pump; the test circulation loop is used for being connected with the target submersible slurry pump and the slurry pool, simulating a preset load and testing the pumping performance of the target submersible slurry pump under the preset load and comprises an inner circulation pipeline, a first adjusting unit, a first flow metering unit and a pressure detection unit, and the first adjusting unit, the first flow metering unit and the pressure detection unit are arranged on the inner circulation pipeline; and the two ends of the auxiliary circulation loop are connected to the mud pool correspondingly, and the auxiliary circulation loop is used for mixing muck and water in the mud pool into mud and conducting circulating heat dissipation on the mud in the mud pool.

Description

Technical Field

[0001] The utility model relates to the technical field of submersible slurry pump tests, and in particular to a submersible slurry pump mud test device. Background Technique

[0002] With the development of projects such as urban intelligent garages, the conventional excavation method has low efficiency and high costs. The open caisson tunneling machine is favored in the construction field for its high efficiency and high cost performance. The submersible slurry pump is a core device on the open caisson tunneling machine, and its function is to absorb and discharge the mud generated by the tunneling machine excavation. Its performance and reliability directly determine the construction efficiency.

[0003] The conventional slurry pump includes two separate parts, namely a motor and a pump, which are connected and driven by a shaft, and the motor has no contact with the muddy water. The working environment of the submersible slurry pump is relatively special. It is completely submerged in the mud for slag discharge. Its structure is different from that of the conventional slurry pump. The motor and the pump are integrated, and a mechanical seal is used to prevent the muddy water from entering the motor cavity. Due to the special structure and working environment of the submersible slurry pump, it has relatively high requirements for pumping, sealing and heat dissipation performance. The submersible slurry pump generally adopts the clean water design theory. The existing test environment for the submersible slurry pump is mostly a clean water environment. Due to the large difference in physical properties between the clean water and the solid-liquid two-phase liquid transported by the slurry pump, which is different from the actual mud environment, there are deviations in the test results.

[0004] To solve the above problems, in the prior art, the performance of the submersible slurry pump is tested by simulating the mud working environment. However, it is difficult to adjust the density of the mud environment and the efficiency is low. It is difficult to simulate the slag discharge performance of different strata in the test, and the pump adopts a suspension fixing method, with low fixing stability and potential safety hazards. On the other hand, the mud in the mud simulation test environment is easy to deposit, resulting in slurry stratification and uneven density. Content of the Utility Model

[0005] The utility model provides a submersible slurry pump mud test device to solve the technical problems of large deviation in the test results of the existing submersible slurry pump and low reliability in performance verification.

[0006] According to one aspect of the utility model, a submersible slurry pump mud test device is provided, including:

[0007] A main body structure, including a bottom plate, a support cylinder arranged on the bottom plate, a support frame arranged on the support cylinder, and an installation frame arranged on the support frame. The bottom plate and the support cylinder form a mud pool for accommodating mud with a preset depth. The support cylinder is respectively connected with a water supply pipe and a grouting pipe for injecting water and muck with a preset ratio to prepare mud with a preset density. The installation frame is used to install the target submersible slurry pump so that the target submersible slurry pump is located at a preset height in the mud pool;

[0008] A test loop circuit is used to connect a target submersible slurry pump and a slurry pit respectively, for simulating a preset load and testing the pumping performance of the target submersible slurry pump under the preset load. It includes an internal circulation pipeline and a first adjustment unit arranged on the internal circulation pipeline for adjusting pipeline resistance, a first flow measurement unit for collecting the pipeline slurry flow rate, and a pressure detection unit for collecting the slurry pressure at the pump outlet.

[0009] An auxiliary circulation circuit has both ends connected to the slurry pit respectively, for mixing the muck and water in the slurry pit into slurry and for circulating and dissipating heat of the slurry in the slurry pit.

[0010] As a further improvement of the above technical solution, the support frame includes vertical beams erected on the bottom plate and support beams arranged on the vertical beams. The support beams include multiple transverse beams and longitudinal beams.

[0011] As a further improvement of the above technical solution, a plurality of grooves for embedding the support beams are opened at the top of the support cylinder, and the distribution positions of the grooves match the layout positions of the transverse beams and the support beams.

[0012] As a further improvement of the above technical solution, the installation frame is of a T-shaped structure to be erected on the support beam, and fixing structures are respectively and correspondingly arranged on the installation frame and the support beam.

[0013] As a further improvement of the above technical solution, the fixing structure includes a channel-shaped support member arranged on the support beam and an installation gasket arranged on the installation frame for cooperating with the channel-shaped support member.

[0014] As a further improvement of the above technical solution, a steel mesh is laid on the support frame, a fence is arranged at the top of the support cylinder, a first ladder is arranged on the outer wall of the support cylinder, and a second ladder is arranged on the support frame corresponding to the installation position of the installation frame.

[0015] As a further improvement of the above technical solution, the auxiliary circulation circuit includes an external circulation pipeline, an auxiliary slurry pump arranged on the external circulation pipeline, and a heat exchange mechanism. The auxiliary slurry pump is used for pumping the slurry in the slurry pit to flow through the external circulation pipeline and then flow back to the slurry pit, and the heat exchange mechanism is used for exchanging heat between the slurry flowing through the external circulation pipeline and the air for cooling.

[0016] As a further improvement of the above technical solution, a plurality of shock-absorbing throats are respectively arranged on the internal circulation pipeline and the external circulation pipeline.

[0017] As a further improvement of the above technical solution, the auxiliary road outlet end of the outer circulation pipeline is located at the bottom of the mud pit. The auxiliary road outlet end of the outer circulation pipeline is provided with a first outlet, a second outlet and an angle adjusting device. The first outlet and the second outlet form a preset angle, and the angle adjusting device is used to adjust the jet angles of the first outlet and / or the second outlet.

[0018] As a further improvement of the above technical solution, drainage mechanisms are arranged on the support cylinder at intervals in the height direction.

[0019] The utility model has the following beneficial effects:

[0020] This test device forms a mud pit by building a main structure with a support cylinder and a bottom plate to simulate the working environment of a submersible slurry pump submerged in mud. By respectively adjusting and controlling the injection ratios of the water supply pipe and the grouting pipe, the mud density in the mud pit is adjusted to simulate different formation mud environments. After installing and fixing the target submersible slurry pump on the installation frame, it is hoisted into the support frame for fixation, which not only ensures firm fixation but also makes the submersible slurry pump located at a preset height in the mud pit. Furthermore, the height difference between the inlet of the target submersible slurry pump and the mud level in the mud pit and the height difference between the outlet of the target submersible slurry pump and the mud level in the mud pit are obtained. By setting up a test circulation loop, the mud in the mud pit is pumped by the submersible slurry pump into the inner circulation pipeline and then flows back into the mud pit. The first adjustment unit can adjust the resistance of the circulation pipeline to simulate different loads of the submersible pump. The flow measurement unit and the pressure detection unit respectively collect the flow rate and head under the current load. There is a certain height difference between the position of the pressure sensor and the pump outlet. Based on the existing calculation method of the relationship between pressure and lift according to the preset height of the pump layout, the pumping performance is finally obtained through tests and calculations; during the test process, the auxiliary circulation loop circulates and pumps the mud in the mud pit to make it fully mixed and dissipate heat, ensuring the reliability of the test results. This test device can adjust the density of the mud pit, simulate different two-phase environments, effectively test the pumping performance of the submersible slurry pump, and make the mud stirred evenly through the auxiliary circulation loop to prevent mud deposition and make the mud density uniform, while maintaining its temperature stability through circulating heat dissipation; the overall structure of this test device is compact, the operation is convenient, and the safety is high.

[0021] In addition to the purposes, features and advantages described above, the utility model has other purposes, features and advantages. The following will refer to the drawings to make a further detailed description of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of this application are used to provide a further understanding of the utility model. The schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an improper limitation of the utility model. In the drawings:

[0023] Figure 1 It is a schematic structural diagram of a preferred embodiment of the present utility model;

[0024] Figure 2 It is a schematic structural diagram of the support frame of a preferred embodiment of the present utility model;

[0025] Figure 3 It is a schematic structural diagram of the connection structure between the support cylinder and the support frame of a preferred embodiment of the present utility model;

[0026] Figure 4 It is a schematic structural diagram of the ear plate of a preferred embodiment of the present utility model;

[0027] Figure 5 It is a schematic structural diagram of the installation frame of a preferred embodiment of the present utility model;

[0028] Figure 6 It is a schematic structural diagram of the connection structure of the installation frame of a preferred embodiment of the present utility model;

[0029] Figure 7 It is a schematic structural diagram of the test circuit and auxiliary circuit of a preferred embodiment of the present utility model.

[0030] Legend Explanation:

[0031] 1. Installation frame; 101. Submersible slurry pump; 102. Side bolts; 103. Bottom bolts; 104. Installation gaskets; 105. Reinforcing ribs; 106. Lifting lugs; 2. Steel wire mesh; 3. Support frame; 31. Cross beams; 32. Longitudinal beams; 33. Vertical beams; 34. Channel-shaped support members; 4. Guardrail; 5. First ladder; 6. Support cylinder; 7. Second ladder; 8. Bottom plate; 9. Test circulation circuit; 91. Outer circulation pipeline; 92. Gate valve; 93. First shock absorber throat; 94. Elbow; 95. First flow measurement unit; 96. Resistance regulating valve; 97. Test circuit outlet end; 98. Pipe clamp; 10. Auxiliary slurry pump; 11. Auxiliary circulation circuit; 111. Inner circulation pipeline; 112. Second gate valve; 113. Third gate valve; 114. Second shock absorber throat; 115. Second flow measurement unit; 116. Auxiliary circuit outlet end; 12. Drainage pipeline; 121. First drainage ball valve; 122. Second drainage ball valve; 123. Third drainage ball valve; 13. Make-up water pipe; 14. Ear plate. Detailed Implementation Modes

[0032] The following will describe the embodiments of the present utility model in detail with reference to the accompanying drawings. However, the present utility model can be implemented in many different ways defined and covered by the following.

[0033] Figure 1 It is a schematic structural diagram of a preferred embodiment of the present utility model; Figure 2 It is a schematic structural diagram of the support frame of a preferred embodiment of the present utility model;Figure 3 It is a schematic diagram of the connection structure between the support cylinder and the support frame of the preferred embodiment of the present utility model; Figure 4 It is a schematic diagram of the ear plate structure of the preferred embodiment of the present utility model; Figure 5 It is a schematic diagram of the installation frame structure of the preferred embodiment of the present utility model; Figure 6 It is a schematic diagram of the connection structure of the installation frame of the preferred embodiment of the present utility model; Figure 7 It is a schematic diagram of the test circuit and auxiliary circuit structures of the preferred embodiment of the present utility model.

[0034] As Figures 1 to 7 shown, the slurry test device for a submersible slurry pump in this embodiment includes:

[0035] The main structure includes a bottom plate 8, a support cylinder 6 arranged on the bottom plate 8, a support frame 3 arranged on the support cylinder 6, and an installation frame 1 arranged on the support frame 3. The bottom plate 8 and the support cylinder 6 form a slurry pool for accommodating slurry with a preset depth. The support cylinder 6 is respectively connected with a water supply pipe 13 and a grouting pipe for injecting water and muck in a preset ratio to prepare slurry with a preset density. The installation frame 1 is used to install the target submersible slurry pump 101 so that the target submersible slurry pump is located at a preset height in the slurry pool;

[0036] The test circulation loop 9 is used to connect the target submersible slurry pump 101 and the slurry pool respectively, and is used to simulate a preset load and test the pumping performance of the target submersible slurry pump 101 under the preset load. It includes an internal circulation pipeline 111, a first adjustment unit for adjusting the pipeline resistance arranged on the internal circulation pipeline 111, a first flow measurement unit 95 for collecting the slurry flow in the pipeline, and a pressure detection unit for collecting the slurry pressure at the pump outlet;

[0037] The auxiliary circulation loop 11 is connected to the slurry pool at both ends, and is used to mix the muck and water in the slurry pool into slurry and to circulate and dissipate the heat of the slurry in the slurry pool.

[0038] Among them, the first adjustment unit can be a resistance regulating valve 96, a gate valve or a globe valve. In this embodiment, the first gate valve 92 is combined with the resistance regulating valve 96 as an example. The first gate valve 92 controls the on / off of the test loop, and the resistance regulating valve 96 adjusts the resistance to simulate the actual pipeline resistance; the pressure detection unit takes a pressure sensor as an example, and can also be a pressure gauge; the first flow measurement unit 95 is a flowmeter; the test outlet end 97 of the test loop 9 faces the slurry pool, and the outlet end of the submersible slurry pump 101 is connected through multiple sections of rigid pipes and / or hoses, and the loop direction is changed through an elbow 94 and a shock absorber throat, and multiple pipe clamps 98 are arranged for pipeline fixation;

[0039] It can be understood that the test device forms a mud pool through the construction of the main structure, with the support cylinder 6 and the bottom plate 8 to simulate the working environment of the submerged mud of the submersible slurry pump 101. By adjusting the injection ratios of the water supply pipe 13 and the grouting pipe respectively, the mud density in the mud pool is adjusted to simulate different formation mud environments. After installing and fixing the target submersible slurry pump 101 on the installation frame 1, it is hoisted into the support frame 3 for fixation, which not only ensures firm fixation but also makes the submersible slurry pump 101 at a preset height in the mud pool. Then, the height difference between the inlet of the target submersible slurry pump 101 and the mud level in the mud pool and the height difference between the outlet of the target submersible slurry pump 101 and the mud level in the mud pool are obtained. By setting up the test circulation loop 9, the mud in the mud pool is pumped to the internal circulation pipeline 111 by the operation of the submersible slurry pump 101 and then flows back into the mud pool. The first adjustment unit can adjust the resistance of the circulation pipeline to simulate different loads of the submersible pump. The first flow measurement unit 95 and the pressure detection unit respectively collect the flow rate and head under the current load. There is a certain height difference between the position of the pressure sensor and the pump outlet. Based on the existing calculation method of the relationship between pressure and lift according to the preset height of the pump layout, the pumping performance is finally obtained through experiments and calculations; during the test, the auxiliary circulation loop 11 circulates and pumps the mud in the mud pool to make it fully mixed and dissipate heat, ensuring the reliability of the test results. This test device can adjust the density of the mud pool, simulate different two-phase environments, effectively test the pumping performance of the submersible slurry pump 101, and make the mud evenly stirred through the auxiliary circulation loop 11 to prevent mud deposition and make the mud density uniform, and maintain its temperature stability through circulating heat dissipation; the overall structure of this test device is compact, the operation is convenient, and the safety is high.

[0040] In this embodiment, a steel mesh 2 is laid on the support frame 3 as a working platform. The outer diameter of the steel mesh 2 is slightly smaller than the inner diameter of the support cylinder 6. A fence is provided at the top of the support cylinder 6 to prevent personnel from falling and for safety protection; a first ladder 5 is provided on the outer wall of the support cylinder 6. In this embodiment, it is a straight ladder; the support frame 3 is provided with a second ladder 7 corresponding to the installation position of the installation frame 1. In this embodiment, it is an inclined ladder for operators to work on the top and inside of the mud pool;

[0041] The support frame 3 includes vertical beams 33 erected on the bottom plate 8 and support beams provided on the vertical beams 33. The support beams include multiple transverse beams 31 and longitudinal beams 32. The longitudinal beams 32 and the transverse beams 31 can be H-shaped steels, and the vertical beams 33 can be square steels; specifically, a plurality of grooves for embedding the support beams are opened at the top of the support cylinder 6, and the distribution positions of the grooves match the layout positions of the transverse beams 31 and the support beams to position and fix the support beams, and the steel mesh 2 is then laid on the support beams;

[0042] To strengthen the strength of the guardrail 4 and the expanded metal mesh 2, lugs 14 are arranged circumferentially at the top of the support cylinder 6. The lugs 14 are welded in sequence. The lugs 14 are provided with a stepped structure to fit the outer wall of the support cylinder 6. The lugs 14 are welded to the expanded metal mesh 2, and the guardrail 4 is arranged on the lugs 14.

[0043] In this embodiment, the installation frame 1 is of a T-shaped structure to be erected on the support beam. Fixed structures are respectively and correspondingly arranged on the installation frame 1 and the support beam. The installation frame 1 has a support plate at the bottom and a side plate on one side. The bottom of the submersible slurry pump 101 is fixedly connected to the support plate through the bottom bolts 103, and the side part is fixedly connected to the side plate through the side bolts 102. After installation, the installation frame 1 is hoisted so that the submersible slurry pump 101 is placed into the slurry pit from the middle of the support frame 3 until the installation frame 1 is erected on the support frame 3. The installation frame 1 is fixed to the support frame 3 through the fixed structure, which is convenient for disassembly and installation, firmly fixed, and reduces the influence of the working vibration of the submersible slurry pump 101.

[0044] Among them, the fixed structure includes a channel-shaped support member 34 arranged on the support beam and an installation gasket 104 arranged on the installation frame 1 for cooperating with the channel-shaped support member 34. The installation gaskets 104 are respectively arranged at the four corners of the installation frame 1. When the installation frame 1 is erected on the support frame 3, the installation gaskets 104 are lapped on the channel-shaped support member 34, and the two are connected and fixed through bolts. The installation frame 1 is also provided with lifting lugs 106 for hoisting, and reinforcing ribs 105 are arranged at the four corners of the installation frame 1 to increase the structural strength.

[0045] In this embodiment, the auxiliary circulation loop 11 includes an outer circulation pipeline 91, an auxiliary slurry pump 10 arranged on the outer circulation pipeline 91, and a heat exchange mechanism. The auxiliary slurry pump 10 is an ordinary slurry pump, which is used to pump the slurry in the slurry pit to flow through the outer circulation pipeline 91 and then flow back to the slurry pit. The heat exchange mechanism is used to exchange heat and cool the slurry flowing through the outer circulation pipeline 91 with air. The heat exchange mechanism includes a cold shower or a water-cooled heat exchanger or an air-cooled heat exchanger. In this embodiment, a cooling tower is taken as an example. The slurry is sucked from the slurry pit into the outer circulation pipeline 91, is sprayed into a water mist shape by the cooling tower to exchange heat and cool with air, and then flows back into the slurry pit, so that the slurry in the slurry pit is mixed and dissipated.

[0046] It can be understood that the outer circulation pipeline 91 is provided with a second adjustment unit and a second flow measurement unit 115 to accurately adjust the flow of the outer circulation pipeline 91 according to the second flow measurement unit 115. The second adjustment unit includes a second gate valve 112 and a third gate valve 113 respectively arranged at the inlet end and the outlet end of the auxiliary slurry pump 10.

[0047] In this embodiment, a first shock absorber throat 93 and a second shock absorber throat 114 are respectively arranged on the inner circulation pipeline 111 and the outer circulation pipeline 91 to reduce the influence of the system working vibration and improve the test effect.

[0048] In this embodiment, a moisture sensor is arranged inside the target submersible slurry pump 101 to detect the sealing performance of the target submersible slurry pump 101, and its sealing performance is fed back according to the moisture sensor before hoisting the submersible slurry pump 101 into the slurry pit; this test device also includes a megohmmeter for detecting the insulation withstand voltage between the motor winding and the ground wire of the target submersible slurry pump 101. The voltage value of the megohmmeter is greater than the motor voltage value of the target submersible slurry pump 101, and it is judged whether it is normal according to the resistance value indication (the resistance value is greater than the insulation value under normal conditions); hoist the submersible slurry pump 101 into the slurry pit, simulate the actual use working condition for testing, and test the insulation withstand voltage resistance between the motor winding and the ground wire after each pump stop, and monitor whether the moisture sensor alarms throughout the process.

[0049] In this embodiment, the auxiliary path outlet end 116 of the outer circulation pipeline 91 is located at the bottom of the slurry pit. The auxiliary path outlet end 116 of the outer circulation pipeline 91 is provided with a first outlet, a second outlet and an angle adjustment device. The first outlet and the second outlet are at a preset angle. The angle adjustment device is used to adjust the jet angles of the first outlet and / or the second outlet to scour the bottom of the slurry pit, assist in stirring the slurry and prevent the slurry from depositing; among them, the first outlet and the second outlet of this embodiment are arranged oppositely.

[0050] In this embodiment, drainage mechanisms are arranged at intervals along the height direction on the support cylinder 6. For example, a first drainage ball valve 121, a second drainage ball valve 122 and a third drainage ball valve 123 are respectively arranged at different height positions and connected to a drainage pipeline 12 to drain the slurry in the slurry pit according to test requirements.

[0051] The above are only the preferred embodiments of the present invention and are not used to limit the present invention. For those skilled in the art, various changes and modifications can be made to the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A slurry test device for a submersible slurry pump, characterized in that, Comprising: A main body structure, including a bottom plate (8), a support cylinder (6) arranged on the bottom plate (8), a support frame (3) arranged on the support cylinder (6), and an installation frame (1) arranged on the support frame (3). The bottom plate (8) and the support cylinder (6) form a mud pool for accommodating mud with a preset depth. The support cylinder (6) is respectively connected with a water supply pipe (13) and a grouting pipe for injecting water and muck with a preset ratio to prepare mud with a preset density. The installation frame (1) is used for installing a target submersible slurry pump (101) so that the target submersible slurry pump is located at a preset height in the mud pool; A test circulation loop (9), which is used to be respectively connected with the target submersible slurry pump (101) and the mud pool, and is used to simulate a preset load and test the pumping performance of the target submersible slurry pump (101) under the preset load. It includes an internal circulation pipeline (111), a first adjustment unit arranged on the internal circulation pipeline (111) for adjusting the pipeline resistance, a first flow measurement unit (95) for collecting the mud flow rate in the pipeline, and a pressure detection unit for collecting the mud pressure at the pump outlet; An auxiliary circulation loop (11), with both ends respectively connected to the mud pool, which is used to mix the muck and water in the mud pool into mud and is used to circulate and dissipate the heat of the mud in the mud pool.

2. The slurry test device for a submersible slurry pump according to claim 1, wherein The support frame (3) includes vertical beams (33) erected on the bottom plate (8) and support beams arranged on the vertical beams (33). The support beams include multiple transverse beams (31) and longitudinal beams (32).

3. The slurry test device for a submersible slurry pump according to claim 2, characterized in that, The top of the support cylinder (6) is provided with a plurality of grooves for embedding the support beams, and the distribution positions of the grooves match the layout positions of the transverse beams (31) and the support beams.

4. The slurry test device for a submersible slurry pump according to claim 2, characterized in that, The installation frame (1) is of a T-shaped structure and is arranged on the support beam, and fixing structures are respectively and correspondingly arranged on the installation frame (1) and the support beam.

5. The diving slurry pump mud test device according to claim 4, characterized in that, The fixing structure includes a channel-shaped support member (34) arranged on the support beam and an installation gasket (104) arranged on the installation frame (1) for cooperating with the channel-shaped support member (34).

6. The slurry test device for a submersible slurry pump according to claim 2, wherein, A steel mesh (2) is laid on the support frame (3), a fence is arranged on the top of the support cylinder (6), a first ladder (5) is arranged on the outer wall of the support cylinder (6), and a second ladder (7) is arranged on the support frame (3) corresponding to the installation position of the installation frame (1).

7. The slurry test device for a submersible slurry pump according to claim 1, wherein, The auxiliary circulation loop (11) includes an outer circulation pipeline (91), an auxiliary slurry pump (10) arranged on the outer circulation pipeline (91), and a heat exchange mechanism. The auxiliary slurry pump (10) is used to pump the mud in the mud pool to flow back to the mud pool after flowing through the outer circulation pipeline (91), and the heat exchange mechanism is used to exchange heat between the mud flowing through the outer circulation pipeline (91) and the air for cooling.

8. The slurry test device for a submersible slurry pump according to claim 7, characterized in that, A plurality of shock-absorbing throats are respectively arranged on the internal circulation pipeline (111) and the outer circulation pipeline (91).

9. The slurry test device for a submersible slurry pump according to claim 7, characterized in that, The auxiliary path outlet end (116) of the outer circulation pipeline (91) is located at the bottom of the mud pit. The auxiliary path outlet end (116) of the outer circulation pipeline (91) is provided with a first outlet, a second outlet and an angle adjusting device. The first outlet and the second outlet form a preset angle, and the angle adjusting device is used to adjust the spraying angles of the first outlet and / or the second outlet.

10. The slurry test device of the submersible slurry pump according to claim 1, characterized in that, Drainage mechanisms are arranged on the support cylinder (6) at intervals in the height direction.

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