Pump performance test system

Abstract

The invention relates to the technical field of pumps, in particular to a pump performance testing system which comprises a liquid storage device, a solid phase supply assembly, a liquid inlet pipe, a pump to be tested and a liquid outlet pipe. The solid phase supply assembly comprises a solid phase conveying device, and a uniform solid phase flow can be formed at the discharging end of the solid phase conveying device; the liquid inlet pipe comprises a vertical pipe section arranged in the vertical direction, the vertical pipe section is communicated with the liquid storage device, and the discharging end of the solid phase conveying device is communicated with the vertical pipe section through the side wall of the vertical pipe section; the inlet end of the to-be-tested pump is communicated with the outlet end of the vertical pipe section, and the to-be-tested pump is used for driving fluid to circularly flow; the inlet end of the liquid outlet pipe is communicated with the outlet end of the pump to be tested, and the outlet end of the liquid outlet pipe is communicated with the liquid storage device. The device and the method solve the problems that in an existing pump test, a solid-liquid two-phase medium which is stable in mass fraction proportion and evenly mixed cannot be constructed, the transportation characteristic of the pump under the action of the solid-liquid two-phase medium with the preset mass fraction cannot be accurately tested, and the test requirement cannot be met.

Description

Technical Field

[0001] The present invention relates to the technical field of pumps, and in particular to a pump performance test system. Background Art

[0002] Pumps are common devices in piping systems, used to drive the flow of fluids within them. In certain situations, pumps need to transport liquids containing a certain amount of solid particles (i.e., solid-liquid two-phase fluids). In these situations, it's important to test parameters such as pump head, power consumption, and motor current at a set solids mass fraction, two-phase flow rate, and speed.

[0003] In existing pump tests, taking the transport of liquid water as an example, a water tank is usually placed at the inlet of the pump, and water is taken from the water tank for testing. However, when faced with a solid-liquid two-phase medium, the problem arises of how to accurately form the inlet conditions of the solid-liquid two-phase medium with a specified solid particle mass fraction (that is, it is difficult to accurately control the solid mass fraction of the two-phase medium during the experiment). Especially when the density of the solid particles is smaller than that of the liquid, the solid particles usually float above the liquid. At this time, if solid particles are added to the water tank, the solid particles will float on the upper part of the water tank and have difficulty entering the pump inlet. More importantly, even if the solid particles and water in the water tank are mixed to a certain extent through methods such as water tank stirring, some solid particles enter the pump inlet along with the transport water. It is difficult to accurately know the mass fraction of the solid particles at the pump inlet at this time. Therefore, it is impossible to accurately test the transport characteristics of the pump under the action of a solid-liquid two-phase medium with a predetermined mass fraction, and it is impossible to meet the test requirements. Summary of the Invention

[0004] The present invention provides a pump performance test system to solve the defects in existing pump tests, such as the inability to construct a solid-liquid two-phase medium with a stable mass fraction ratio and uniform mixing, the inability to accurately test the pump's transport characteristics under the action of a solid-liquid two-phase medium with a predetermined mass fraction, and the inability to meet test requirements.

[0005] The invention provides a pump performance test system, comprising a liquid storage device, a solid phase supply component, a liquid inlet pipe, a pump to be tested and a liquid outlet pipe.

[0006] A liquid storage cavity for storing liquid medium is formed in the liquid storage device; the solid-phase supply assembly includes a solid-phase conveying device, and the discharge end of the solid-phase conveying device can form a uniform solid-phase flow; the liquid inlet pipe includes a vertical pipe section arranged vertically, and the vertical pipe section is connected to the liquid storage device, and the discharge end of the solid-phase conveying device is connected to the vertical pipe section through the side wall of the vertical pipe section; the inlet end of the pump to be tested is connected to the outlet end of the vertical pipe section, and the pump to be tested is used to drive the fluid to circulate; the inlet end of the liquid outlet pipe is connected to the outlet end of the pump to be tested, and the outlet end of the liquid outlet pipe is connected to the liquid storage device.

[0007] According to the pump performance test system provided by the present invention, a material delivery cavity is formed in the solid-phase delivery device, and the material delivery cavity is lower than the highest point of the liquid storage cavity.

[0008] According to the pump performance test system provided by the present invention, the feed cavity is arranged to be inclined downward along the direction from the feed end to the discharge end; the solid phase supply assembly also includes a first discharge pipe and a second discharge pipe, the inlet end of the first discharge pipe is connected to the discharge end of the feed cavity, the inlet end of the second discharge pipe is connected to the outlet end of the first discharge pipe, and the outlet end of the second discharge pipe is connected to the vertical pipe section; the first discharge pipe is arranged to be inclined downward along the direction from the feed end to the discharge end, and the second discharge pipe is arranged to be inclined upward along the direction from the feed end to the discharge end.

[0009] The pump performance test system provided according to the present invention further includes a first control valve, which is arranged on the first discharge pipe or the second discharge pipe.

[0010] According to the pump performance test system provided by the present invention, the solid phase conveying device is a screw feeding device, and the screw feeding device includes a screw feeding mechanism and a material trough, the material trough forms the feeding cavity, and the screw feeding mechanism is located in the feeding cavity.

[0011] According to the pump performance test system provided by the present invention, the spiral feeding device further includes a hopper, and the outlet end of the hopper is connected to the inlet end of the hopper.

[0012] The pump performance test system provided according to the present invention further includes a vertical mixing tube arranged vertically, the inlet end of the vertical mixing tube is connected to the outlet end of the vertical pipe section, and the outlet end of the vertical mixing tube is connected to the pump to be tested.

[0013] The pump performance test system provided by the present invention further includes a second control valve and a third control valve. The second control valve is provided on the liquid inlet pipe, and the third control valve is provided on the liquid outlet pipe.

[0014] The pump performance test system provided by the present invention further includes a first flow detection device and a second flow detection device. The first flow detection device is arranged on the liquid inlet pipe, and the second flow detection device is arranged on the discharge pipe.

[0015] According to the pump performance test system provided by the present invention, the liquid storage device is provided with an overflow structure, and the overflow structure is communicated with the solid-phase conveying device.

[0016] The pump performance test system provided by the present invention can continuously supply a solid-liquid two-phase medium with a stable mass fraction ratio and a uniform mixture at the inlet end of the pump to be tested when testing a pump to be tested that contains a solid-liquid two-phase mixed fluid in which the density of the solid phase medium is less than that of the liquid phase medium, so that the fluid properties are more consistent with the conditions in the actual pipeline system, thereby improving the system's test accuracy for the pump to be tested.

[0017] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction is given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 Schematic diagram of a pump performance test system provided in one embodiment of the present invention.

[0020] Figure 2 This is a schematic diagram of a pump performance test system provided in the second embodiment of the present invention.

[0021] Reference numerals: 100. Liquid storage device; 110. Overflow structure; 200. Solid-phase supply assembly; 210. Solid-phase conveying device; 220. First discharge pipe; 230. Second discharge pipe; 240. First control valve; 250. Feeding hopper; 300. Liquid inlet pipe; 310. Vertical pipe section; 320. Vertical mixing pipe; 330. Second control valve; 340. First flow detection device; 400. Pump to be tested; 500. Liquid outlet pipe; 510. Third control valve; 520. Second flow detection device; 600. Overflow pipeline. DETAILED DESCRIPTION

[0022] To make the objectives, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0023] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as limiting the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance.

[0024] In the description of the embodiments of the present invention, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; and direct connections or indirect connections through an intermediary. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0025] In the embodiments of the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," or "above" a second feature may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. A first feature being "below," "below," or "below" a second feature may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0026] In the description of this specification, the reference terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and features of different embodiments or examples without contradiction.

[0027] The following combination Figure 1 and Figure 2 The pump performance test system provided by the present invention is described.

[0028] See also Figure 1 As shown, the pump performance test system provided by the embodiment of the present invention includes: a liquid storage device 100, a solid phase supply assembly 200, a liquid inlet pipe 300, a pump to be tested 400 and a liquid outlet pipe 500.

[0029] A liquid storage cavity for storing liquid medium is formed in the liquid storage device 100; the solid phase supply assembly 200 includes a solid phase conveying device 210, and the discharge end of the solid phase conveying device 210 can form a uniform solid phase flow; the liquid inlet pipe 300 includes a vertical pipe section 310 arranged vertically, and the vertical pipe section 310 is connected to the liquid storage device 100, and the discharge end of the solid phase conveying device 210 is connected to the vertical pipe section 310 through the side wall of the vertical pipe section 310; the inlet end of the pump to be tested 400 is connected to the outlet end of the vertical pipe section 310, and the pump to be tested 400 is used to drive the fluid to circulate; the inlet end of the liquid outlet pipe 500 is connected to the outlet end of the pump to be tested 400, and the outlet end of the liquid outlet pipe 500 is connected to the liquid storage device 100.

[0030] The pump performance testing system provided by the present invention, when testing a pump 400 containing a solid-liquid two-phase mixed fluid in which the solid phase medium has a lower density than the liquid phase medium, can continuously supply a uniformly mixed solid-liquid two-phase medium at a stable mass fraction ratio to the inlet of the pump 400. This ensures that the fluid properties more closely match those in an actual piping system, thereby improving the system's testing accuracy for the pump 400. For example, the solid phase medium can be ice, and the liquid phase medium can be water.

[0031] During the test, liquid is first supplied through the liquid storage device 100, and the liquid medium is returned to the liquid storage device 100 through the liquid inlet pipe 300, the pump 400 to be tested and the liquid outlet pipe 500 under the driving action of the test pump 400 to achieve circulation. Since the discharge end of the solid-phase conveying device 210 can form a uniform solid-phase flow, the mixing ratio of the solid-liquid two-phase medium in the fluid can be accurately controlled by controlling the flow rate of the liquid medium in the liquid inlet pipe 300. In addition, the discharge end of the solid-phase conveying device 210 is connected to the vertical pipe section 310 through the side wall of the vertical pipe section 310. The liquid medium in the vertical pipe section 310 flows from bottom to top. When the solid-phase medium enters the vertical pipe section 310, it can be evenly dispersed, reducing the aggregation of particles, and enhancing the interaction between the solid-phase medium and the liquid-phase medium, further improving the uniformity of the solid-liquid two-phase mixed fluid.

[0032] In the test system, pressure measuring points are arranged in the upstream and downstream pipe sections of the pump 400 to be tested. The pressure measuring points are close to the inlet and outlet flanges of the pump 400 to be tested, so as to measure the inlet and outlet pressure difference of the pump 400 to be tested, and thus obtain the head of the test pump under given working conditions.

[0033] By precisely controlling the mixing ratio of the solid-liquid two-phase medium in the fluid and controlling the uniformity of the solid-liquid two-phase mixed fluid, the test accuracy of the system for the pump 400 to be tested can be significantly improved.

[0034] It should be noted that the pump test system provided by the present invention can accurately adjust the mixing ratio of the solid-liquid two-phase medium in the fluid by controlling the addition amount of the solid-phase medium and / or adjusting the flow rate of the liquid-phase medium in the liquid inlet pipe 300. It can also adjust the flow rate of the solid-liquid two-phase fluid to achieve the test of the parameters such as the head, power and motor current of the pump 400 to be tested at a certain speed, and has strong flexibility.

[0035] Specifically, the pump performance testing system includes: a liquid storage device 100 , a solid phase supply assembly 200 , a liquid inlet pipe 300 , a pump to be tested 400 and a liquid outlet pipe 500 .

[0036] Among them, the liquid storage device 100 is used to store liquid-phase medium to ensure the supply of liquid-phase medium required in the system. The liquid storage device 100 has a set capacity, which can maintain the circulation flow of the fluid in the system and maintain a stable supply of liquid-phase medium. The solid-phase supply component 200 is used to continuously and evenly supply the solid-phase medium. The solid-phase supply component 200 includes a solid-phase conveying device 210. Since the discharge end of the solid-phase conveying device 210 can form a uniform solid-phase flow, a spiral feeding device or the like can be used. The liquid inlet pipe 300 is responsible for conveying the liquid-phase medium from the liquid storage device 100 to the pump 400 to be tested. The vertical pipe section 310 of the liquid inlet pipe 300 can optimize the uniform mixing degree of the solid-liquid two-phase medium. Pump 400 under test is the component under test and the driving component in the system. During testing, the rotational speed of pump 400 can be maintained constant, and the mixing ratio and / or flow rate of the solid-liquid two-phase medium in the fluid can be adjusted to test parameters such as the lift, power, and motor current of pump 400 under test at the current rotational speed. Alternatively, the mixing ratio and / or flow rate of the solid-liquid two-phase medium in the fluid can be maintained constant to test parameters such as the lift, power, and motor current of pump 400 under test at different rotational speeds. Liquid outlet pipe 500 is used to return the solid-liquid two-phase medium flowing through pump 400 to the liquid storage device 100 for circulation.

[0037] See also Figure 1 As shown, according to some embodiments of the present invention, a material delivery cavity is formed in the solid phase delivery device 210, and the material delivery cavity is lower than the highest point of the liquid storage cavity.

[0038] By setting a feeding cavity in the solid-phase conveying device 210 and making the feeding cavity lower than the highest point of the liquid storage cavity, the liquid phase medium in the liquid storage device 100 can be introduced into the feeding cavity at the beginning of the test, so that the solid phase medium and the liquid phase medium are mixed in advance, and then can be better mixed with the liquid phase medium when entering the vertical pipe section 310 to form a uniform solid-liquid two-phase mixed fluid of the liquid phase medium, thereby further improving the test accuracy of the pump performance test system.

[0039] Specifically, since the material delivery cavity is lower than the highest point of the liquid storage cavity, the liquid medium in the liquid storage cavity can flow into the material delivery cavity under the action of its own gravity.

[0040] See also Figure 1 As shown, according to some embodiments of the present invention, the feed cavity is arranged to be inclined downward along the direction from the feed end to the discharge end; the solid phase supply assembly 200 also includes a first discharge pipe 220 and a second discharge pipe 230, the inlet end of the first discharge pipe 220 is connected to the discharge end of the feed cavity, the inlet end of the second discharge pipe 230 is connected to the outlet end of the first discharge pipe 220, and the outlet end of the second discharge pipe 230 is connected to the vertical pipe section 310; the first discharge pipe 220 is arranged to be inclined downward along the direction from the feed end to the discharge end, and the second discharge pipe 230 is arranged to be inclined upward along the direction from the feed end to the discharge end.

[0041] By setting the discharge chamber tilted downward in the direction from the feed end to the discharge end, the liquid medium in the system can enter the discharge chamber and be pre-mixed with the solid medium. At the same time, by setting a first discharge pipe 220 tilted downward in the direction from the feed end to the discharge end and a second discharge pipe 230 tilted upward in the direction from the feed end to the discharge end, the first discharge pipe 220 and the second discharge pipe 230 can be used to connect the discharge chamber with the side wall of the vertical pipe section 310, and can effectively prevent the solid medium from accumulating and clogging in the discharge pipe.

[0042] Specifically, since the density of the solid-phase medium is less than that of the liquid-phase medium, the solid-phase medium will float above the liquid-phase medium in the discharge chamber. When the discharge chamber is tilted downward in the direction from the feed end to the discharge end, the liquid-phase medium can first flow in smoothly and mix with the solid-phase medium, ensuring that the two media can fully contact and initially mix. As the solid-liquid two-phase fluid flows out of the discharge chamber, the downward tilt of the first discharge pipe 220 can enable the solid-liquid two-phase fluid to flow smoothly downward under the action of gravity, preventing accumulation or blockage, while the upward tilt of the second discharge pipe 230 can guide the solid-liquid two-phase fluid in advance, providing a vertical upward flow velocity component, which is convenient for introducing it into the vertical pipe section 310.

[0043] Preferably, the first discharge pipe 220 in this embodiment is shorter, which can prevent the solid-liquid two-phase fluid from accumulating or clogging at the bent connection between the first discharge pipe 220 and the second discharge pipe 230 .

[0044] See also Figure 1 As shown, according to some embodiments of the present invention, the pump performance test system further includes a first control valve 240 , which is disposed on the first discharge pipe 220 or the second discharge pipe 230 .

[0045] By providing the first control valve 240 on the first discharge pipe 220 or the second discharge pipe 230 , the solid phase medium and the liquid phase medium can be isolated when the system is shut down to prevent the two from mixing or unnecessary cross-influence.

[0046] As an example, the first control valve 240 in this embodiment is disposed on the second discharge pipe 230. Of course, in some embodiments, the first control valve 240 may also be disposed on the first discharge pipe 220, which is not particularly limited.

[0047] See also Figure 1 As shown, according to some embodiments of the present invention, the solid phase conveying device 210 is a screw feeding device, which includes a screw feeding mechanism and a material trough. The material trough is formed with a feeding cavity, and the screw feeding mechanism is located in the feeding cavity.

[0048] By using a screw feeder as the solid-phase conveying device 210, the screw feeder can propel the solid-phase medium through rotating spiral blades, providing a stable and uniform solid-phase flow, thereby maintaining a stable supply of the solid-phase medium and ensuring a stable mass fraction ratio of the solid-liquid two-phase fluid. Furthermore, the feed trough facilitates the layout of the screw feeder mechanism and forms a feed cavity for accommodating the initially mixed solid-liquid two-phase fluid.

[0049] See also Figure 1 As shown, according to some embodiments of the present invention, the screw feeding device further includes a hopper 250, and the outlet end of the hopper 250 is connected to the inlet end of the hopper.

[0050] By providing the feeding hopper 250 , the solid phase medium can be continuously added to the screw feeding device using the feeding hopper 250 to ensure a stable supply of the solid phase medium and at the same time obtain the added amount of the solid phase medium.

[0051] Preferably, in this embodiment, the feeding hopper 250 and the material trough are integrated, which can eliminate the connection gap between the feeding hopper 250 and the material trough and improve the sealing performance of the solid-phase conveying device 210.

[0052] See also Figure 1 As shown, according to some embodiments of the present invention, the pump performance test system further includes a vertical mixing tube 320 arranged vertically, the inlet end of the vertical mixing tube is connected to the outlet end of the vertical pipe section 310, and the outlet end of the vertical mixing tube is connected to the pump 400 to be tested.

[0053] By providing a vertical mixing tube 320 between the vertical pipe section 310 and the pump 400 to be tested, the mixing effect of the solid medium and the liquid medium can be further optimized, the uniformity of the mixing of the two can be improved, and the test accuracy of the system for the pump 400 to be tested can be further improved.

[0054] Specifically, the vertical mixing tube can provide additional mixing space. When the fluid passes through the vertical mixing tube, it can effectively eliminate the flow instability caused by flow velocity differences and vortexes in the pipeline, thereby reducing the impact on the test accuracy of the pump 400 to be tested.

[0055] See also Figure 1 As shown, according to some embodiments of the present invention, the pump performance test system further includes a second control valve 330 and a third control valve 510 . The second control valve 330 is provided at the liquid inlet pipe 300 , and the third control valve 510 is provided at the liquid outlet pipe 500 .

[0056] By setting a second control valve 330 on the liquid inlet pipe 300, the flow rate of the liquid medium can be adjusted, thereby adjusting the mixing ratio of the liquid medium and the solid medium, so as to realize the test of the working parameters of the test pump 400 with different mixing ratios of solid-liquid two-phase fluids. When it is necessary to adjust the mixing ratio of the solid-liquid two-phase fluid, the second control valve 330 can achieve different ratios of liquid phase to solid phase by adjusting the flow rate of the liquid medium. For example, if it is necessary to increase the proportion of the liquid medium, it is only necessary to increase the flow rate of the liquid through the second control valve 330, thereby increasing the proportion of the liquid phase in the solid-liquid two-phase fluid; conversely, if it is necessary to increase the proportion of the solid medium, the flow rate of the liquid medium can be reduced through the second control valve 330. It is also possible to adjust the mixing ratio of the solid-liquid two-phase fluid by controlling the rotational speed of the solid-phase conveying device 210 to adjust the flow rate of the solid medium. For example, if the proportion of the liquid phase medium needs to be increased, the rotation speed of the solid-phase conveying device 210 can be reduced to reduce the flow rate of the solid-phase medium, thereby increasing the proportion of the liquid phase in the solid-liquid two-phase fluid; conversely, if the proportion of the solid phase medium needs to be increased, the rotation speed of the solid-phase conveying device 210 can be increased to increase the flow rate of the solid-phase medium, thereby increasing the proportion of the solid phase in the solid-liquid two-phase fluid. By providing the third control valve 510 on the liquid outlet pipe 500, the flow rate of the solid-liquid two-phase medium in the liquid outlet pipe 500 can be adjusted by controlling the opening of the third control valve 510. For example, when the flow rate of the solid-liquid two-phase medium in the liquid outlet pipe 500 needs to be increased, the opening of the third control valve 510 can be increased; correspondingly, when the flow rate of the solid-liquid two-phase medium in the liquid outlet pipe 500 needs to be reduced, the opening of the third control valve 510 can be reduced.

[0057] See also Figure 1As shown, according to some embodiments of the present invention, the pump performance test system further includes a first flow detection device 340 and a second flow detection device 520. The first flow detection device 340 is provided on the liquid inlet pipe 300, and the second flow detection device 520 is provided on the discharge pipe.

[0058] By providing a first flow detection device 340 on the liquid inlet pipe 300, the flow rate of the liquid phase medium can be accurately detected, ensuring that the control and setting of the liquid phase medium flow rate meet the test requirements when the pump 400 to be tested is tested. The first flow detection device 340 preferably adopts a conventional electromagnetic flowmeter, which can accurately test the flow rate of the liquid phase medium. Of course, in some embodiments, other flow detection devices capable of detecting the flow rate of the liquid phase medium can also be used, and this is not particularly limited. By providing a second flow detection device 520 on the liquid outlet pipe 500, the fluid flow rate after passing through the pump 400 to be tested can be detected in real time, providing the system with data feedback on the flow rate of the liquid outlet pipe 500. The flow rate of the solid phase medium can also be inferred by the test results of the first flow detection device 340 and the second flow detection device 520, without having to record the addition flow rate of the solid phase medium, thereby simplifying the test operation. For example, when the addition flow rate of the solid phase medium is difficult to determine, the solid phase medium flow rate can be inferred by the test results of the first flow detection device 340 and the second flow detection device 520.

[0059] See also Figure 2 As shown, according to some embodiments of the present invention, the liquid storage device 100 is provided with an overflow structure 110 , and the overflow structure 110 is connected to the solid phase transport device 210 .

[0060] By setting up an overflow structure 110 and connecting the overflow structure 110 with the solid-phase conveying device 210, the solid-phase medium in the solid-liquid two-phase material returned to the liquid storage device 100 can re-enter the solid-phase conveying device 210 to achieve circulation, thereby eliminating the workload of removing the solid-phase medium from the liquid storage device 100 and the manual labor of adding the solid-phase medium during long-term testing.

[0061] Specifically, the inlet of the overflow structure 110 is slightly lower than the liquid level in the liquid storage device 100. Since the density of the solid phase medium is lower than that of the liquid phase medium, after the solid-liquid two-phase material returns to the liquid storage device 100, the solid phase medium can float on the liquid surface and reach the solid-phase conveying device 210 through the overflow structure 110. The overflow structure 110 can be an overflow port, etc., which is connected to the solid-phase conveying device 210 through the overflow pipe 600.

[0062] The test process of the pump performance test system provided by the present invention is described below. Figure 1 and Figure 2 shown.

[0063] During the test, liquid is first supplied through liquid storage device 100. Driven by the pump to be tested 400, the liquid medium circulates through the horizontal section of the liquid inlet pipe 300, the second control valve 330, the first flow detection device 340, the vertical section 310 of the liquid inlet pipe 300, the pump to be tested 400, the liquid outlet pipe 500, the third control valve 510, and the second flow detection device 520, returning to the liquid storage device 100. Second control valve 330 is a regulating valve that can adjust the flow rate of the liquid medium, and first flow detection device 340 can accurately measure the flow rate of the liquid medium.

[0064] The solid-phase medium is added through the feeding hopper 250 and transported to the first feeding pipe by the screw feeding device. It then passes through the second feeding pipe and the first control valve 240 in sequence and enters the vertical pipe section 310 of the liquid inlet pipe 300 to mix with the liquid-phase medium. The mixed solid-liquid two-phase medium enters the vertical mixing pipe for further uniform mixing before entering the valve to be tested. During the test, the solid-phase medium can be continuously added to the screw feeding device through the feeding hopper 250 (the amount of solid-phase medium added can be obtained at the same time) and the amount of solid-phase medium added can be ensured to be in a stable state. Combined with the speed control of the screw feeding device, a stable solid-phase flow can be formed at the discharge end of the screw feeding device, ensuring that the flow rates of the solid-phase medium and the liquid-phase medium are both in a fixed state during mixing, that is, forming a two-phase medium with a set solid-phase mass dispersion, which meets the test requirements of the hydraulic characteristics of the pump 400 to be tested.

[0065] At the initial stage of the test, the liquid medium needs to be introduced into the feeding chamber of the solid-phase conveying device 210 to initially mix with the solid-phase medium and the liquid-phase medium. This ensures that the solid-phase medium mixes more evenly with the liquid-phase medium upon entering the liquid inlet pipe 300, thereby improving test accuracy. Once the solid-phase medium addition process stabilizes, the flow rate of the solid-phase medium in the solid-liquid two-phase medium is consistent with the addition flow rate of the solid-phase medium. This means that the solid-phase medium flow rate can be directly obtained. Combined with the liquid-phase medium flow rate measured by the first flow detection device 340, the mass fraction of the solid-phase medium in the solid-liquid two-phase medium can be calculated.

[0066] After flowing through the pump to be tested 400, the solid-liquid two-phase medium returns to the liquid storage device 100 through the liquid outlet pipe 500, the second flow detection device 520, and the third control valve 510. The third control valve 510 is a regulating valve that can overall adjust the flow rate of the solid-liquid two-phase medium in the liquid outlet pipe 500. The second flow detection device 520 can be used to detect the flow rate of the solid-liquid two-phase medium in the liquid outlet pipe 500. When the amount of solid-phase medium to be added is difficult to determine, the detection results of the first flow detection device 340 and the second flow detection device 520 can be used to calculate the mass fraction of the solid-phase medium in the solid-liquid two-phase medium.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A pump performance test system, characterized in that: include: A liquid storage device, wherein a liquid storage cavity for storing a liquid medium is formed in the liquid storage device; A solid phase supply assembly, the solid phase supply assembly comprising a solid phase conveying device, the discharge end of the solid phase conveying device being capable of forming a uniform solid phase flow; A liquid inlet pipe, the liquid inlet pipe comprising a vertical pipe section arranged vertically, the vertical pipe section being connected to the liquid storage device, and the discharge end of the solid-phase conveying device being connected to the vertical pipe section through a side wall of the vertical pipe section; a pump to be tested, wherein the inlet end of the pump to be tested is connected to the outlet end of the vertical pipe section, and the pump to be tested is used to drive the fluid to circulate; A liquid outlet pipe, wherein the inlet end of the liquid outlet pipe is connected to the outlet end of the pump to be tested, and the outlet end of the liquid outlet pipe is connected to the liquid storage device.

2. The pump performance test system according to claim 1, characterized in that: A material delivery cavity is formed in the solid phase delivery device, and the material delivery cavity is lower than the highest point of the liquid storage cavity.

3. The pump performance test system according to claim 2, characterized in that: The feeding cavity is arranged to be inclined downward from the feeding end to the discharging end; The solid phase supply assembly further includes a first discharge pipe and a second discharge pipe, wherein the inlet end of the first discharge pipe is connected to the discharge end of the feed cavity, the inlet end of the second discharge pipe is connected to the outlet end of the first discharge pipe, and the outlet end of the second discharge pipe is connected to the vertical pipe section; The first discharge pipe is arranged to be tilted downward along the direction from the feed end to the discharge end, and the second discharge pipe is arranged to be tilted upward along the direction from the feed end to the discharge end.

4. The pump performance test system according to claim 3, characterized in that: It also includes a first control valve, which is arranged on the first discharge pipe or the second discharge pipe.

5. The pump performance test system according to claim 2, characterized in that: The solid-phase conveying device is a screw feeding device, which includes a screw feeding mechanism and a material trough. The material trough forms the material feeding cavity, and the screw feeding mechanism is located in the material feeding cavity.

6. The pump performance test system according to claim 5, characterized in that: The spiral feeding device further comprises a hopper, wherein the outlet end of the hopper is communicated with the inlet end of the hopper.

7. The pump performance test system according to any one of claims 1 to 6, characterized in that: It also includes a vertical mixing tube arranged vertically, the inlet end of the vertical mixing tube is connected to the outlet end of the vertical pipe section, and the outlet end of the vertical mixing tube is connected to the pump to be tested.

8. The pump performance test system according to any one of claims 1 to 6, characterized in that: It also includes a second control valve and a third control valve, wherein the second control valve is arranged on the liquid inlet pipe, and the third control valve is arranged on the liquid outlet pipe.

9. The pump performance test system according to any one of claims 1 to 6, characterized in that: It also includes a first flow detection device and a second flow detection device, wherein the first flow detection device is arranged on the liquid inlet pipe, and the second flow detection device is arranged on the discharge pipe.

10. The pump performance test system according to any one of claims 1 to 6, characterized in that: The liquid storage device is provided with an overflow structure, and the overflow structure is communicated with the solid phase transporting device.

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