Self-priming pump test device

Abstract

The present invention provides a self-priming pump testing device, which relates to the technical field of testing machinery, and aims to solve the technical problems that the construction process of the current self-priming test bench is time-consuming and laborious, the installation of the self-priming pump on the self-priming test bench is inconvenient, and the testing efficiency of the self-priming pump is relatively low. The self-priming pump testing device includes a self-priming test tank, a self-priming pump to be tested, and a vacuum degree detection device; the self-priming test tank is communicated with the self-priming pump to be tested, and the gas in the self-priming test tank is sucked into the self-priming pump to be tested when the self-priming pump to be tested works; a vacuum degree detection device is arranged between the self-priming test tank and the self-priming pump to be tested. The self-priming pump testing device provided by the present invention reflects the self-priming height of the self-priming pump through the vacuum degree in the self-priming test tank, and does not need to build a relatively high vertical distance. Therefore, the construction process of the self-priming pump testing device is time-saving and labor-saving, the installation of the self-priming pump during testing is relatively convenient, and the testing efficiency of the self-priming pump is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of mechanical testing, and particularly to a self-priming pump testing device. Background Art

[0002] A self-priming pump belongs to a self-priming centrifugal pump, can transport various liquids, and has the advantages of being structurally compact, energy-efficient, and having good self-priming performance. It has wide applications in industries such as chemical engineering, petroleum, pharmaceuticals, mining, papermaking, and fibers.

[0003] The testing technology of self-priming pumps is very important in the quality control of self-priming pumps. When testing self-priming pumps currently, a performance test bench and a self-priming test bench are used to test the self-priming pump separately. Usually, the performance test is first completed on the performance test bench, and then the self-priming pump is disassembled from the performance test bench and installed on the self-priming test bench. The self-priming test bench has a relatively high vertical distance. The self-priming pump is installed at a high place and sucks water upward from a low place, and then the self-priming height and self-priming time are measured.

[0004] However, the construction process of the current self-priming test bench is time-consuming and laborious, and the installation of the self-priming pump on the self-priming test bench is extremely inconvenient, reducing the testing efficiency of the self-priming pump. Summary of the Invention

[0005] In order to solve at least one problem mentioned in the background art, the present invention provides a self-priming pump testing device, which is time-saving and labor-saving in construction, convenient for the installation of the self-priming pump, and improves the testing efficiency of the self-priming pump.

[0006] To achieve the above object, the present invention provides a self-priming pump testing device, which includes a self-priming test tank, a self-priming pump to be tested, and a vacuum degree detection device.

[0007] The self-priming test tank is communicated with the self-priming pump to be tested, and the gas in the self-priming test tank is sucked into the self-priming pump to be tested when the self-priming pump to be tested works.

[0008] A vacuum degree detection device is arranged between the self-priming test tank and the self-priming pump to be tested.

[0009] Further, a liquid level detection device for detecting the liquid level in the self-priming test tank is arranged on the self-priming test tank.

[0010] Further, the self-priming test tank includes a tank body, an air inlet and outlet arranged at the top of the tank body, and a liquid discharge port arranged at the bottom of the tank body.

[0011] The gas in the tank body is discharged to the outside through the air inlet and outlet, or the gas outside enters the tank body through the air inlet and outlet. The liquid in the tank body is discharged to the outside through the liquid discharge port to regulate the gas volume in the self-priming test tank.

[0012] A gas valve is provided at the air inlet and outlet, and a liquid valve is provided at the liquid discharge port.

[0013] Further, the self-priming test tank and the self-priming pump to be tested are connected through a first pipeline, and the vacuum degree detection device is arranged on the first pipeline, on either the outlet of the self-priming test tank or the inlet of the self-priming pump to be tested.

[0014] A first valve is arranged on the first pipeline.

[0015] When the vacuum degree detection device is arranged on the first pipeline, the vacuum degree detection device is located between the first valve and the outlet of the self-priming test tank.

[0016] Further, a liquid storage tank is also included, and the self-priming pump to be tested is communicated with the liquid storage tank.

[0017] A first pressure gauge is arranged between the liquid outlet of the liquid storage tank and the inlet of the self-priming pump to be tested, and a second pressure gauge is arranged between the liquid inlet of the liquid storage tank and the outlet of the self-priming pump to be tested.

[0018] Further, a flow rate detection device is arranged between the outlet of the self-priming pump to be tested and the liquid inlet of the liquid storage tank.

[0019] Further, the inlet of the self-priming pump to be tested and the liquid outlet of the liquid storage tank are connected through a second pipeline, the first pressure gauge is arranged on the second pipeline, and a liquid outlet valve is arranged at the liquid outlet of the liquid storage tank.

[0020] Further, the first pipeline is connected to the second pipeline through a three-way interface, the first valve is located between the three-way interface and the self-priming test tank, the liquid outlet valve is located between the three-way interface and the liquid outlet of the liquid storage tank, and the first pressure gauge is located between the three-way interface and the inlet of the self-priming pump to be tested.

[0021] And / or, a check valve is arranged between the inlet of the self-priming pump to be tested and the first pressure gauge, and when the check valve is opened, the flow direction of the internal liquid is towards the self-priming pump to be tested.

[0022] Further, the outlet of the self-priming pump to be tested and the liquid inlet of the liquid storage tank are connected through a third pipeline, and the second pressure gauge is arranged on the third pipeline.

[0023] Further, a second valve is arranged on the third pipeline, and both the second pressure gauge and the flow rate detection device are located between the second valve and the outlet of the self-priming pump to be tested.

[0024] The present invention provides a self-priming pump testing device. By connecting the self-priming pump to be tested with a self-priming test tank, injecting liquid into the self-priming test tank to make the gas volume in the self-priming test tank equal to the volume in the water pipe of the existing self-priming test bench, the self-priming pump to be tested extracts the gas in the self-priming test tank during operation. A vacuum degree detection device arranged between the self-priming test tank and the self-priming pump to be tested can detect the vacuum degree in the self-priming test tank. When the vacuum degree in the self-priming test tank no longer changes, the negative pressure borne by the self-priming test tank can be known according to the vacuum degree at this time, and thus the self-priming height of the self-priming pump to be tested can be obtained. A timing device is used to measure the time from when the self-priming pump to be tested starts working until the vacuum degree in the self-priming test tank no longer changes, and thus the self-priming time of the self-priming pump to be tested can be obtained. This self-priming pump testing device reflects the self-priming height of the self-priming pump through the vacuum degree in the self-priming test tank, without the need to build a relatively high vertical distance. Therefore, the construction process of this self-priming pump testing device saves time and effort, and the self-priming pump is relatively convenient to install during testing, improving the testing efficiency of the self-priming pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 It is a schematic structural diagram of the connection between the self-priming test tank and the self-priming pump to be tested provided by the embodiment of the present invention;

[0027] Figure 2 It is a schematic structural diagram of the self-priming test tank provided by the embodiment of the present invention;

[0028] Figure 3 It is a schematic overall structural diagram of the self-priming pump testing device provided by the embodiment of the present invention.

[0029] Description of the reference numerals:

[0030] 10 - Self-priming test tank; 11 - Self-priming pump to be tested; 12 - Vacuum degree detection device; 13 - Liquid level detection device; 14 - Gas valve; 15 - Liquid valve; 16 - First pipeline; 17 - First valve; 18 - Liquid storage tank; 19 - First pressure gauge; 20 - Second pressure gauge; 21 - Flow rate detection device; 22 - Second pipeline; 23 - Liquid outlet valve; 24 - Three-way interface; 25 - Check valve; 26 - Third pipeline; 27 - Second valve. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0031] The self-priming pump belongs to self-priming centrifugal pumps, which can transport various liquids and has the advantages of compact structure, high efficiency and energy saving, and good self-priming performance. It has a wide range of applications in industries such as chemical engineering, petroleum, pharmaceuticals, mining, papermaking, and fiber. The testing technology of self-priming pumps is very important for the quality control of self-priming pumps. When testing the existing self-priming pumps, a performance test bench and a self-priming test bench are used to test the self-priming pump separately. Usually, the performance test is first completed on the performance test bench, and then the self-priming pump is removed from the performance test bench and installed on the self-priming test bench. The self-priming test bench has a relatively high vertical distance. The self-priming pump is installed at a high place and sucks water upward from a low place, and then the self-priming height and self-priming time are measured. However, the current self-priming test bench has a relatively high vertical distance, which is time-consuming and laborious in the construction process, and makes the installation of the self-priming pump on the self-priming test bench extremely inconvenient, reducing the testing efficiency of the self-priming pump.

[0032] In view of the above problems, the present invention provides a self-priming pump testing device. By connecting the self-priming pump to be tested with a self-priming test tank and injecting liquid into the self-priming test tank, the volume of gas in the self-priming test tank is made equal to the volume in the water pipe of the existing self-priming test bench. When the self-priming pump to be tested works, it extracts the gas in the self-priming test tank. A vacuum degree detection device arranged between the self-priming test tank and the self-priming pump to be tested can detect the vacuum degree in the self-priming test tank. When the vacuum degree in the self-priming test tank no longer changes, the negative pressure borne by the self-priming test tank can be known according to the current vacuum degree, and then the self-priming height of the self-priming pump to be tested can be obtained. A timing device such as a stopwatch is used to measure the time from when the self-priming pump to be tested starts working until the vacuum degree in the self-priming test tank no longer changes, and then the self-priming time of the self-priming pump to be tested can be obtained. This self-priming pump testing device reflects the self-priming height of the self-priming pump through the vacuum degree in the self-priming test tank, and there is no need to build a relatively high vertical distance. Therefore, the construction process of this self-priming pump testing device is time-saving and laborious, the installation of the self-priming pump during testing is relatively convenient, and the testing efficiency of the self-priming pump is improved.

[0033] To make the objectives, technical solutions, and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be described in more detail below with reference to the accompanying drawings in the preferred embodiments of the present invention. In the drawings, the same or similar reference numerals represent the same or similar components or components with the same or similar functions from beginning to end. The described embodiments are some, but not all, of the embodiments of the present invention. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention. The embodiments of the present invention will be described in detail below with reference to the drawings.

[0034] An embodiment of the present invention provides a self-priming pump testing device. Figure 1The figure is a schematic structural diagram of the self-priming test tank provided by the embodiment of the present invention connected to the self-priming pump to be tested. Refer to Figure 1 As shown, the self-priming pump test device includes a self-priming test tank 10, a self-priming pump 11 to be tested, and a vacuum degree detection device 12. The self-priming test tank 10 is communicated with the self-priming pump 11 to be tested, that is, the self-priming test tank 10 is communicated with the inlet of the self-priming pump 11 to be tested, and the gas in the self-priming test tank 10 is sucked into the self-priming pump 11 to be tested when the self-priming pump 11 to be tested works. A vacuum degree detection device 12 is arranged between the self-priming test tank 10 and the self-priming pump 11 to be tested, and the vacuum degree detection device 12 can detect the vacuum degree in the self-priming test tank 10.

[0035] When using this self-priming pump test device to test the self-priming pump 11 to be tested, liquids such as water, lubricating oil, and alcohol are injected into the self-priming test tank 10 to make the gas volume in the self-priming test tank 10 equal to the volume in the water pipe of the existing self-priming test bench, and the inlet of the self-priming pump 11 to be tested is communicated with the self-priming test tank 10. When the self-priming pump 11 to be tested works, it pumps out the gas in the self-priming test tank 10. The vacuum degree detection device 12 arranged between the self-priming test tank 10 and the self-priming pump 11 to be tested can detect the vacuum degree in the self-priming test tank 10. When the vacuum degree in the self-priming test tank 10 no longer changes, the negative pressure borne by the self-priming test tank 10 can be known according to the vacuum degree at this time, and then the self-priming height of the self-priming pump 11 to be tested can be obtained. Use a timing device such as a stopwatch to measure the time from when the self-priming pump 11 to be tested starts working to when the vacuum degree in the self-priming test tank 10 no longer changes, and then the self-priming time of the self-priming pump 11 to be tested can be obtained.

[0036] This self-priming pump test device reflects the self-priming height of the self-priming pump through the vacuum degree in the self-priming test tank 10, and there is no need to build a relatively high vertical distance. Therefore, the construction process of this self-priming pump test device saves time and effort, and the self-priming pump is relatively convenient to install during the test, improving the test efficiency of the self-priming pump.

[0037] Among them, the vacuum degree refers to the degree of rarefaction of the gas in a vacuum state. The vacuum degree of the self-priming test tank 10 of this self-priming pump test device can be read from the measured value of the vacuum degree detection device 12, and the vacuum degree value represents the value of the pressure in the self-priming test tank 10 lower than the atmospheric pressure value. The vacuum degree detection device 12 can specifically be a vacuum degree test meter, a barometer, or other devices that can detect the pressure in the self-priming test tank 10.

[0038] When calculating the self-priming height based on the vacuum degree in the self-priming test tank 10, first calculate the negative pressure borne by the self-priming test tank 10 according to the vacuum degree in the self-priming test tank 10 and the surface area of the self-priming test tank 10. The negative pressure borne by the self-priming test tank 10 is equal to the gravity of the liquid column in the water pipe of the existing self-priming test bench when it reaches the self-priming height. Furthermore, the self-priming height can be obtained based on the negative pressure borne by the self-priming test tank 10, the inner diameter calculation of the water pipe of the existing self-priming test bench, and the liquid density.

[0039] Figure 2 FIG. is a schematic structural diagram of the self-priming test tank provided by an embodiment of the present invention. As Figure 1 and 2 shown, a liquid level detection device 13 for detecting the liquid level in the self-priming test tank 10 is provided on the self-priming test tank 10.

[0040] Among them, the liquid level detection device 13 can be a volume display tube communicated with the self-priming test tank 10, a liquid level gauge provided on the self-priming test tank 10, or other devices capable of indicating the liquid level.

[0041] It is known that the total volume of the self-priming test tank 10 is a fixed value, and the liquid level height in the self-priming test tank 10 can be read through the liquid level detection device 13. The liquid volume in the self-priming test tank 10 can be calculated based on the liquid level height and the bottom area of the self-priming test tank 10. Furthermore, the gas volume can be calculated based on the total volume of the self-priming test tank 10 and the liquid volume in the self-priming test tank 10.

[0042] The gas volume in the self-priming test tank 10 can be calculated through the liquid level detection device 13, which facilitates adjusting the gas volume in the self-priming test tank 10, so that the gas volume in the self-priming test tank 10 is equal to the volume in the water pipe of the existing self-priming test bench before the test starts.

[0043] Continue to refer to Figure 1 and Figure 2 , the self-priming test tank 10 includes a tank body, an air inlet / outlet provided at the top of the tank body, and a liquid discharge port provided at the bottom of the tank body. Among them, the tank body can store liquid and gas and can withstand negative pressure without obvious deformation when the self-priming pump 11 to be tested is working. The air inlet / outlet on the tank body is used for gas to enter or exit the tank body, and the liquid discharge port on the tank body is used for the liquid in the tank body to flow out.

[0044] When injecting liquid into the tank body, the gas in the tank body is discharged to the outside of the tank body through the air inlet / outlet. When the liquid in the tank body is discharged to the outside of the tank body through the liquid discharge port, the gas outside the tank body enters the tank body through the air inlet / outlet. The user can adjust the gas volume in the self-priming test tank 10 through the air inlet / outlet and the liquid discharge port on the tank body.

[0045] The air inlet and outlet are provided with a gas valve 14. When the intake valve is opened, the gas outside the tank can enter the tank, and the gas inside the tank can also be discharged to the outside of the tank. The liquid discharge port is provided with a liquid valve 15. When the liquid valve 15 is opened, the liquid inside the tank can flow out from the liquid discharge port. When the self-priming pump testing device tests the self-priming ability of the self-priming pump 11 to be tested, both the gas valve 14 and the liquid valve 15 are closed. When the self-priming pump 11 to be tested works, it can suck out the gas inside the tank, creating a negative pressure inside the tank.

[0046] Refer to Figure 1 As shown, the self-priming test tank 10 and the self-priming pump 11 to be tested are connected through a first pipeline 16, that is, one end of the first pipeline 16 is connected to the self-priming test tank 10, and the other end of the first pipeline 16 is connected to the inlet of the self-priming pump 11 to be tested. Figure 1 It is shown that the vacuum degree detection device 12 is arranged on the first pipeline 16. Of course, the vacuum degree detection device 12 can also be arranged at the outlet of the self-priming test tank 10 or the inlet of the self-priming pump 11 to be tested.

[0047] Moreover, a first valve 17 is arranged on the first pipeline 16. When the first valve 17 is opened, the first pipeline 16 connects the self-priming test tank 10 and the self-priming pump 11 to be tested. When the first valve 17 is closed, the self-priming test tank 10 and the self-priming pump 11 to be tested are disconnected.

[0048] When the vacuum degree detection device 12 is Figure 1 arranged as shown on the first pipeline 16, the vacuum degree detection device 12 is located between the first valve 17 and the outlet of the self-priming test tank 10. After the first valve 17 is closed, the operation of the self-priming pump to be tested will not affect the vacuum degree detection device 12, which can effectively protect the vacuum degree detection device 12 and extend the service life of the vacuum degree detection device 12.

[0049] Figure 3 This is the overall structural schematic diagram of the water pump testing device provided by the embodiment of the present invention. As Figure 3 shown, the self-priming pump detection device further includes a liquid storage tank 18, and the liquid storage tank 18 stores liquids such as water, lubricating oil or alcohol. The self-priming pump 11 to be tested is connected to the liquid storage tank 18, that is, both the inlet and the outlet of the self-priming pump 11 to be tested are connected to the liquid storage tank 18. When the self-priming pump 11 to be tested works, the liquid in the liquid storage tank 18 flows out and then enters the self-priming pump 11 to be tested, and the liquid flows back to the liquid storage tank 18 after flowing out of the self-priming pump 11 to be tested.

[0050] A first pressure gauge 19 is arranged between the liquid outlet of the liquid storage tank 18 and the inlet of the self-priming pump 11 to be tested, and a second pressure gauge 20 is arranged between the liquid inlet of the liquid storage tank 18 and the outlet of the self-priming pump 11 to be tested.

[0051] The first pressure gauge 19 can measure the liquid pressure at the inlet of the self-priming pump 11 to be tested, and the second pressure gauge 20 can measure the liquid pressure at the outlet of the self-priming pump. Based on the liquid pressure at the inlet of the self-priming pump 11 to be tested, the liquid pressure at the outlet of the self-priming pump 11 to be tested, and the vertical distance between the first pressure gauge 19 and the second pressure gauge 20, the lift of the self-priming pump 11 to be tested can be calculated. Specifically, the formula for calculating the lift of the self-priming pump 11 to be tested is as follows:

[0052] H = h + (P2 - P1) / ρg

[0053] Wherein, H is the lift of the self-priming pump 11 to be tested, h is the vertical distance between the first pressure gauge 19 and the second pressure gauge 20, P1 is the liquid pressure at the inlet of the self-priming pump 11 to be tested, P2 is the liquid pressure at the outlet of the self-priming pump 11 to be tested, ρ is the density of the liquid, and g is the acceleration due to gravity.

[0054] Continue to refer to Figure 3 As shown, a flow detection device 21 is provided between the outlet of the self-priming pump 11 to be tested and the liquid inlet of the liquid storage tank 18.

[0055] Among them, the flow detection device 21 is specifically a device such as a liquid vortex flowmeter, an orifice flowmeter, an insertion flowmeter, etc. that can detect the flow rate at the outlet of the self-priming pump 11 to be tested. The flow detection device 21 can detect the flow rate at the outlet of the self-priming pump.

[0056] The performance parameters of the self-priming pump 11 to be tested include lift, flow rate, and power. Based on the liquid pressure at the inlet of the self-priming pump 11 to be tested, the liquid pressure at the outlet of the self-priming pump 11 to be tested, and the vertical distance between the first pressure gauge 19 and the second pressure gauge 20, the lift of the self-priming pump 11 to be tested can be calculated. Based on the flow detection device 21, the flow rate of the self-priming pump 11 to be tested can be obtained. Based on the current and voltage when the self-priming pump 11 is working, the power of the self-priming pump 11 to be tested can be calculated. Therefore, this self-priming pump testing device can not only test the self-priming ability of the self-priming pump 11 to be tested, that is, the self-priming height and self-priming time of the self-priming pump 11 to be tested, but also test the performance parameters of the self-priming pump 11 to be tested, that is, the lift, flow rate, and power of the self-priming pump 11 to be tested. Using this self-priming pump testing device can replace the existing self-priming pump performance testing bench and self-priming pump self-priming testing bench, and the testing is more convenient and efficient.

[0057] Continue to refer to Figure 3As shown, the inlet of the self-priming pump 11 to be tested is connected to the liquid outlet of the liquid storage tank 18 through the second pipeline 22, that is, one end of the second pipeline 22 is connected to the liquid outlet of the liquid storage tank 18, and the other end of the second pipeline 22 is connected to the inlet of the self-priming pump 11 to be tested. The first pressure gauge 19 is arranged on the second pipeline 22, and a liquid outlet valve 23 is arranged at the liquid outlet of the liquid storage tank 18. When the self-priming pump testing device tests the lift and flow rate of the self-priming pump 11 to be tested, the liquid outlet valve 23 is opened to connect the liquid outlet of the liquid storage tank 18 with the inlet of the self-priming pump 11 to be tested through the second pipeline 22. The self-priming pump 11 to be tested can suck out the liquid in the liquid storage tank 18, so that the first pressure gauge 19, the second pressure gauge 20 and the flow rate detection device 21 can test the corresponding parameters.

[0058] Continue to refer to Figure 3 As shown, the first pipeline 16 is connected to the second pipeline 22 through a tee joint 24. The first valve 17 is located between the tee joint 24 and the self-priming test tank 10, and the liquid outlet valve 23 is located between the tee joint 24 and the liquid outlet of the liquid storage tank 18. When testing the performance parameters of the self-priming pump 11 to be tested, the first valve 17 is closed and the liquid outlet valve 23 is opened. When testing the self-priming ability of the self-priming pump 11 to be tested, the first valve 17 is opened and the liquid outlet valve 23 is closed.

[0059] Moreover, the first pressure gauge 19 is located between the tee joint 24 and the inlet of the self-priming pump 11 to be tested. The first pressure gauge 19 is closer to the inlet of the self-priming pump 11 to be tested, and the liquid pressure at the inlet of the self-priming pump 11 to be tested measured by the first pressure gauge 19 is more accurate.

[0060] A check valve 25 is arranged between the inlet of the self-priming pump 11 to be tested and the first pressure gauge 19. When the check valve 25 is opened, the flow direction of the internal liquid is towards the self-priming pump 11 to be tested. When the self-priming pump 11 to be tested starts or stops, the liquid in the second pipeline 22 may flow back. The check valve 25 can prevent the liquid in the second pipeline 22 from flowing back and prevent the backflowing liquid from damaging the first pressure gauge 19.

[0061] Continue to refer to Figure 3 As shown, the outlet of the self-priming pump 11 to be tested is connected to the liquid inlet of the liquid storage tank 18 through the third pipeline 26, that is, one end of the third pipeline 26 is connected to the outlet of the self-priming pump 11 to be tested, and the other end of the third pipeline 26 is connected to the liquid inlet of the liquid storage tank 18. Moreover, the second pressure gauge 20 is arranged on the third pipeline 26, so that the second pressure gauge 20 can measure the liquid pressure at the outlet of the self-priming pump 11 to be tested.

[0062] Continue to refer to Figure 3 As shown, a second valve 27 is arranged on the third pipeline 26. The second pressure gauge 20 and the flow rate detection device 21 are both located between the second valve 27 and the outlet of the self-priming pump 11 to be tested.

[0063] When the self-priming pump testing device tests the performance of the self-priming pump 11 to be tested, first close the second valve 27. After the self-priming pump 11 to be tested starts, open and adjust the second valve 27 to keep the liquid flow between the liquid storage tank 18 and the self-priming pump 11 to be tested stable, and then read the values of the first pressure gauge 19, the second pressure gauge 20 and the flow detection device 21.

[0064] In the description of the embodiments of the present invention, it should be understood that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, or an indirect connection through an intermediate medium, and can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations. The orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention. In the description of the present invention, the meaning of "a plurality" is two or more, unless otherwise specifically and precisely defined.

[0065] The terms "first", "second", "third", "fourth", etc. (if any) in the specification, claims and above-mentioned drawings of this application are used to distinguish similar objects, and do not have to be used to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances, so that the embodiments of this application described here can be implemented in an order different from those illustrated or described here. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product or device comprising a series of steps or units does not have to be limited to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0066] 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 them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A self-priming pump testing device, characterized in that, It includes a self-priming test tank, a self-priming pump to be tested, and a vacuum degree detection device; The self-priming test tank is connected to the self-priming pump to be tested, and the gas in the self-priming test tank is sucked into the self-priming pump to be tested when the self-priming pump to be tested works; A vacuum degree detection device is arranged between the self-priming test tank and the self-priming pump to be tested; Liquid is injected into the self-priming test tank to make the gas volume in the self-priming test tank equal to the volume in the water pipe of the existing self-priming test bench. When the self-priming pump to be tested works, it extracts the gas in the self-priming test tank. The vacuum degree detection device is used to detect the vacuum degree in the self-priming test tank. When the vacuum degree no longer changes, the negative pressure borne by the self-priming test tank is obtained according to the vacuum degree, so as to obtain the self-priming height of the self-priming pump to be tested; A timing device is used to measure the time from when the self-priming pump to be tested starts working until the vacuum degree in the self-priming test tank no longer changes, so as to obtain the self-priming time of the self-priming pump to be tested.

2. The self-priming pump testing device according to claim 1, characterized in that, A liquid level detection device for detecting the liquid level in the self-priming test tank is arranged on the self-priming test tank.

3. The self-priming pump testing device according to claim 2, characterized in that, The self-priming test tank includes a tank body, an air inlet / outlet arranged at the top of the tank body, and a liquid discharge port arranged at the bottom of the tank body; The gas in the tank body is discharged to the outside through the air inlet / outlet, or the gas outside enters the tank body through the air inlet / outlet. The liquid in the tank body is discharged to the outside through the liquid discharge port to regulate the gas volume in the self-priming test tank; A gas valve is arranged at the air inlet / outlet, and a liquid valve is arranged at the liquid discharge port.

4. The self-priming pump testing device according to any one of claims 1-3, characterized in that, The self-priming test tank and the self-priming pump to be tested are connected through a first pipeline, and the vacuum degree detection device is arranged on any one of the first pipeline, the outlet of the self-priming test tank, and the inlet of the self-priming pump to be tested; A first valve is arranged on the first pipeline; When the vacuum degree detection device is arranged on the first pipeline, the vacuum degree detection device is located between the first valve and the outlet of the self-priming test tank.

5. The self-priming pump testing device according to claim 4, characterized in that, It further includes a liquid storage tank, and the self-priming pump to be tested is connected to the liquid storage tank; A first pressure gauge is arranged between the liquid outlet of the liquid storage tank and the inlet of the self-priming pump to be tested, and a second pressure gauge is arranged between the liquid inlet of the liquid storage tank and the outlet of the self-priming pump to be tested.

6. The self-priming pump testing device according to claim 5, characterized in that, A flow detection device is arranged between the outlet of the self-priming pump to be tested and the liquid inlet of the liquid storage tank.

7. The self-priming pump testing device according to claim 5, characterized in that The inlet of the self-priming pump to be tested and the liquid outlet of the liquid storage tank are connected through a second pipeline. The first pressure gauge is arranged on the second pipeline, and a liquid outlet valve is arranged at the liquid outlet of the liquid storage tank.

8. The self-priming pump testing device according to claim 7, wherein, The first pipeline is connected to the second pipeline through a three-way interface. The first valve is located between the three-way interface and the self-priming test tank. The liquid outlet valve is located between the three-way interface and the liquid outlet of the liquid storage tank. The first pressure gauge is located between the three-way interface and the inlet of the self-priming pump to be tested; And / or, a check valve is arranged between the inlet of the self-priming pump to be tested and the first pressure gauge. When the check valve is opened, the flow direction of the internal liquid is towards the self-priming pump to be tested.

9. The self-priming pump testing device according to claim 6, characterized in that, The outlet of the self-priming pump to be measured and the liquid inlet of the liquid storage tank are connected through a third pipeline, and the second pressure gauge is arranged on the third pipeline.

10. The self-priming pump testing device according to claim 9, wherein A second valve is arranged on the third pipeline, and both the second pressure gauge and the flow detection device are located between the second valve and the outlet of the self-priming pump to be measured.

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