阅读说明：本技术 自吸泵测试装置 (Self-priming pump testing device ) 是由 李晓军 张万云 顾锐 于 2020-07-07 设计创作，主要内容包括：本发明提供了一种自吸泵测试装置,涉及测试机械技术领域,以解决目前的自吸测试台的建造过程费时费力,自吸泵在自吸测试台上的安装不便以及自吸泵的测试效率较低的技术问题。该自吸泵测试装置包括自吸测试罐、待测自吸泵以及真空度检测装置；自吸测试罐与待测自吸泵连通,自吸测试罐中的气体在待测自吸泵工作时被吸入待测自吸泵中；自吸测试罐和待测自吸泵之间设置有真空度检测装置。本发明提供的自吸泵测试装置通过自吸测试罐内的真空度来反映自吸泵的自吸高度,不需要建造较高的垂直距离,进而该自吸泵测试装置建造过程省时省力,自吸泵在测试时安装比较方便,提高了自吸泵的测试效率。(The invention provides a self-priming pump testing device, relates to the technical field of testing machinery, and aims to solve the technical problems that the construction process of the conventional self-priming test bench is time-consuming and labor-consuming, the self-priming pump is inconvenient to install on the self-priming test bench, and the testing efficiency of the self-priming pump is low. The self-priming pump testing device comprises a self-priming testing tank, a self-priming pump to be tested and a vacuum degree detection device; the self-priming test tank is communicated with a self-priming pump to be tested, and 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; and 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 invention reflects the self-priming height of the self-priming pump through the vacuum degree in the self-priming testing tank, and does not need to build a higher vertical distance, so that the self-priming pump testing device is time-saving and labor-saving in the building process, the self-priming pump is convenient to install during testing, and the testing efficiency of the self-priming pump is improved.)

1. A self-priming pump testing device is characterized by comprising a self-priming testing tank, a self-priming pump to be tested and a vacuum degree detection device;

the self-priming test tank is communicated with a self-priming pump to be tested, and 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;

and a vacuum degree detection device is arranged between the self-priming test tank and the self-priming pump to be tested.

2. The self-priming pump testing device of claim 1, wherein a liquid level detection device is provided on said self-priming test canister for detecting the level of liquid in said self-priming test canister.

3. The self-priming pump testing device of claim 2, wherein said self-priming test canister comprises a canister body, and an air inlet and outlet port disposed at a top of said canister body and a liquid outlet port disposed at a bottom of said canister body;

the gas in the tank body is discharged to the outside through the gas inlet and outlet, or the external gas enters the tank body through the gas inlet and outlet, and the liquid in the tank body is discharged to the outside through the liquid outlet so as to regulate and control the volume of the gas in the self-priming test tank;

and the air inlet and the air outlet are provided with air valves, and the liquid outlet is provided with a liquid valve.

4. The self-priming pump testing device of any one of claims 1 to 3, wherein the self-priming test tank and the self-priming pump to be tested are communicated through a first pipeline, and the vacuum detection device is disposed on any one of the first pipeline, an outlet of the self-priming test tank and an 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 positioned between the first valve and the outlet of the self-priming test tank.

5. The self-primer pump testing device of claim 4 further comprising a reservoir, said self-primer pump to be tested being in communication with said reservoir;

the liquid storage tank is characterized in that 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 of claim 5, wherein a flow detection device is disposed between the outlet of the self-priming pump to be tested and the inlet of the liquid storage tank.

7. The self-primer pump testing device of claim 5, wherein the inlet of the self-primer pump to be tested is in communication with the liquid outlet of the reservoir via a second conduit, the first pressure gauge is disposed on the second conduit, and a liquid outlet valve is disposed at the liquid outlet of the reservoir.

8. The self-primer pump testing device of claim 7, wherein said first tubing is connected to said second tubing by a tee fitting, said first valve is positioned between said tee fitting and said self-primer test canister, said outlet valve is positioned between said tee fitting and an outlet of said reservoir, and said first pressure gauge is positioned between said tee fitting and an inlet of said self-primer pump to be tested;

and/or a check valve is arranged between the inlet of the self-sucking pump to be detected and the first pressure gauge, and the flow direction of the internal liquid is towards the self-sucking pump to be detected when the check valve is opened.

9. The self-priming pump testing device of claim 6, wherein the outlet of the self-priming pump to be tested is communicated with the liquid inlet of the liquid storage tank through a third pipeline, and the second pressure gauge is arranged on the third pipeline.

10. The self-primer pump testing device of claim 9 wherein said third conduit is provided with a second valve, and said second pressure gauge and said flow sensing device are both located between said second valve and an outlet of said self-primer pump under test.

Technical Field

The invention relates to the technical field of mechanical testing, in particular to a self-sucking pump testing device.

Background

The self-priming pump belongs to a self-priming centrifugal pump, can convey various liquids, has the advantages of compact structure, high efficiency, energy conservation, good self-priming performance and the like, and has wide application in the industries of chemical industry, petroleum, pharmacy, mining, papermaking, fiber and the like.

The testing technology of the self-priming pump is very important in the quality control of the self-priming pump. When the self-priming pump is tested, the self-priming pump is tested by adopting a test performance test board and a self-priming test board. Generally, a performance test is completed on a performance test bench, then a self-priming pump is detached from the performance test bench and mounted on the self-priming test bench, the self-priming test bench has a high vertical distance, the self-priming pump is mounted at a high position and sucks water upwards from a low position, and then the self-priming height and the self-priming time are measured.

However, the construction process of the current self-priming test bench is time-consuming and labor-consuming, the self-priming pump is extremely inconvenient to install on the self-priming test bench, and the test efficiency of the self-priming pump is reduced.

Disclosure of Invention

In order to solve at least one problem mentioned in the background art, the invention provides a self-sucking pump testing device which is time-saving and labor-saving in construction, convenient for installation of a self-sucking pump and capable of improving testing efficiency of the self-sucking pump.

In order to achieve the purpose, the invention provides a self-priming pump testing device which comprises a self-priming testing tank, a self-priming pump to be tested and a vacuum degree detection device.

The self-priming test tank is communicated with a self-priming pump to be tested, and 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.

And a vacuum degree detection device is arranged between the self-priming test tank and the self-priming pump to be tested.

Furthermore, a liquid level detection device for detecting the liquid level in the self-priming test tank is arranged on the self-priming test tank.

Further, the self-absorption test tank comprises a tank body, an air inlet and outlet arranged at the top of the tank body and a liquid outlet arranged at the bottom of the tank body.

And the gas in the tank body is discharged to the outside through the gas inlet and outlet, or the external gas enters the tank body through the gas inlet and outlet, and the liquid in the tank body is discharged to the outside through the liquid outlet so as to regulate and control the volume of the gas in the self-priming test tank.

And the air inlet and the air outlet are provided with air valves, and the liquid outlet is provided with a liquid valve.

Further, from inhaling the test tank with the self priming pump that awaits measuring communicates through first pipeline, vacuum detection device sets up first pipeline, from inhaling the export of test tank and wait to await measuring on the arbitrary one in the entry of self priming pump.

The first pipeline is provided with a first valve.

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

Further, still include the liquid reserve tank, the self priming pump that awaits measuring with the liquid reserve tank intercommunication.

The liquid storage tank is characterized in that 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.

Furthermore, a flow detection device is arranged between the outlet of the self-priming pump to be detected and the liquid inlet of the liquid storage tank.

Further, the inlet of the self-priming pump to be tested is communicated with the liquid outlet of the liquid storage tank 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.

Furthermore, the first pipeline passes through the tee bend interface and inserts in the second pipeline, first valve is located the tee bend interface with from inhaling between the test tank, go out the liquid valve and be located the tee bend interface with between the liquid outlet of liquid reserve tank, first manometer is located the tee bend interface with await measuring between the entry of self priming pump.

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

Furthermore, the outlet of the self-priming pump to be tested is communicated with the liquid inlet of the liquid storage tank through a third pipeline, and the second pressure gauge is arranged on the third pipeline.

Furthermore, a second valve is arranged on the third pipeline, and the second pressure gauge and the flow detection device are both positioned between the second valve and the outlet of the self-priming pump to be detected.

The invention provides a self-priming pump testing device, which is characterized in that a self-priming pump to be tested is communicated with a self-priming testing tank, liquid is injected into the self-priming testing tank, so that the volume of gas in the self-priming testing tank is equal to the volume in a water pipe of an existing self-priming testing table, the self-priming pump to be tested pumps out the gas in the self-priming testing tank during working, a vacuum degree detection device arranged between the self-priming testing tank and the self-priming pump to be tested can detect the vacuum degree in the self-priming testing tank, and when the vacuum degree in the self-priming testing tank is not changed any more, the negative pressure borne by the self-priming testing tank is known according to the vacuum degree at the moment, so that the self-priming height of the self-priming pump to be tested can be obtained. And measuring the time from the beginning of the self-priming pump to be tested to the time when the vacuum degree in the self-priming test tank is not changed by using the timing device, and further obtaining the self-priming time of the self-priming pump to be tested. This self priming pump testing arrangement reflects self priming height of self priming pump through the vacuum in the self priming test jar, need not build higher vertical distance, and then this self priming pump testing arrangement building process labour saving and time saving, and the self priming pump installation is more convenient when the test, has improved the efficiency of software testing of self priming pump.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a connection between a self-priming test tank and a self-priming pump to be tested according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a self-priming test canister according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of the overall structure of a self-priming pump testing device according to an embodiment of the present invention.

Description of reference numerals:

10-a self-priming test tank; 11-a self-sucking pump to be detected; 12-vacuum degree detection device; 13-liquid level detection means; 14-a gas valve; 15-a liquid valve; 16-a first conduit; 17-a first valve; 18-a liquid storage tank; 19-a first pressure gauge; 20-a second pressure gauge; 21-flow detection means; 22-a second conduit; 23-a liquid outlet valve; 24-a three-way interface; 25-a check valve; 26-a third conduit; 27-second valve.

Detailed Description

The self-priming pump belongs to a self-priming centrifugal pump, can convey various liquids, has the advantages of compact structure, high efficiency, energy conservation, good self-priming performance and the like, and has wide application in the industries of chemical industry, petroleum, pharmacy, mining, papermaking, fiber and the like. The testing technology of the self-priming pump is very important in the quality control of the self-priming pump. When the self-priming pump is tested, the self-priming pump is tested by adopting a test performance test board and a self-priming test board. Generally, a performance test is completed on a performance test bench, then a self-priming pump is detached from the performance test bench and mounted on the self-priming test bench, the self-priming test bench has a high vertical distance, the self-priming pump is mounted at a high position and sucks water upwards from a low position, and then the self-priming height and the self-priming time are measured. However, the current self-priming test bench has a higher vertical distance, the construction process is time-consuming and labor-consuming, the self-priming pump is extremely inconvenient to install on the self-priming test bench, and the test efficiency of the self-priming pump is reduced.

In order to solve the problems, the invention provides a self-priming pump testing device, a self-priming pump to be tested is communicated with a self-priming testing tank, liquid is injected into the self-priming testing tank, the volume of gas in the self-priming testing tank is equal to the volume in a water pipe of an existing self-priming testing platform, the self-priming pump to be tested pumps out the gas in the self-priming testing tank during working, a vacuum degree detection device arranged between the self-priming testing tank and the self-priming pump to be tested can detect the vacuum degree in the self-priming testing tank, when the vacuum degree in the self-priming testing tank is not changed any more, the negative pressure borne by the self-priming testing tank is known according to the vacuum degree at the moment, and further the self-priming height of the self-priming pump to be tested can be obtained. And measuring the time from the start of the self-priming pump to be tested to the time when the vacuum degree in the self-priming test tank is not changed by using timing devices such as a stopwatch and the like, and further obtaining the self-priming time of the self-priming pump to be tested. This self priming pump testing arrangement reflects self priming height of self priming pump through the vacuum in the self priming test jar, need not build higher vertical distance, and then this self priming pump testing arrangement building process labour saving and time saving, and the self priming pump installation is more convenient when the test, has improved the efficiency of software testing of self priming pump.

In order to make the objects, 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 denote the same or similar components or components having the same or similar functions throughout. The described embodiments are only some, but not all embodiments of the invention. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention. Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

The embodiment of the invention provides a self-priming pump testing device, and fig. 1 is a schematic structural diagram of a connection between a self-priming testing tank and a self-priming pump to be tested, which is provided by the embodiment of the invention, and is shown in fig. 1, the self-priming pump testing device comprises a self-priming testing tank 10, a self-priming pump to be tested 11 and a vacuum degree detection device 12. From inhaling test tank 10 and the self priming pump 11 intercommunication that awaits measuring, from inhaling test tank 10 and the entry intercommunication of the self priming pump 11 that awaits measuring promptly, the gas in the self priming test tank 10 is inhaled in the self priming pump 11 that awaits measuring 11 during the during operation of the self priming pump that awaits measuring. 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.

When the self-priming pump testing device is used for testing the self-priming pump 11 to be tested, liquid such as water, lubricating oil and alcohol is injected into the self-priming test tank 10, so that the volume of gas in the self-priming test tank 10 is equal to the volume in a water pipe of the conventional self-priming test bench, and an inlet of the self-priming pump 11 to be tested is communicated with the self-priming test tank 10. The self-priming pump 11 that awaits measuring will inhale the gas in the test tank 10 certainly at the during operation, and the vacuum detection device 12 that sets up between self-priming test tank 10 and the self-priming pump 11 that awaits measuring can detect the vacuum in the test tank 10 certainly, and when the vacuum in the test tank 10 no longer changes certainly, learns the negative pressure that self-priming test tank 10 bore according to vacuum this moment, and then can obtain the height of awaiting measuring from inhaling of self-priming pump 11. And measuring the time from the beginning of the self-priming pump 11 to be tested to the moment when the vacuum degree in the self-priming test tank 10 is not changed by using a timing device such as a stopwatch, and the like, so as to obtain the self-priming time of the self-priming pump 11 to be tested.

This self priming pump testing arrangement reflects self priming height of self priming pump through the vacuum in the test tank 10 that self priming, need not build higher vertical distance, and then this self priming pump testing arrangement building process labour saving and time saving, and the self priming pump installation is more convenient when the test, has improved the efficiency of software testing of self priming pump.

The vacuum degree is a degree of rareness of the gas in a vacuum state. The vacuum degree of the self-priming test tank 10 of the self-priming pump test device can be read from the numerical value measured by the vacuum degree detection device 12, and the vacuum degree numerical value represents the numerical value that the pressure in the self-priming test tank 10 is lower than the atmospheric pressure. The vacuum degree detection device 12 may be a vacuum degree test meter, a barometer, or other devices capable of detecting the pressure inside the self-priming test tank 10.

When the self-priming height is calculated according to the vacuum degree in the self-priming test tank 10, firstly, the negative pressure borne by the self-priming test tank 10 is calculated according to the vacuum degree in the self-priming test tank 10 and the surface area of the self-priming test tank 10, the gravity borne by the negative pressure borne by the self-priming test tank 10 and the liquid column in the water pipe of the conventional self-priming test bench when reaching the self-priming height, and then the self-priming height can be calculated according to the negative pressure borne by the self-priming test tank 10, the inner diameter of the water pipe of the conventional self-priming test bench and the liquid density.

Fig. 2 is a schematic structural diagram of a self-priming test tank according to an embodiment of the present invention, and as shown in fig. 1 and 2, a liquid level detection device 13 for detecting a liquid level in the self-priming test tank 10 is disposed on the self-priming test tank 10.

The liquid level detecting device 13 may be a volume display tube communicating with the self-priming test tank 10, a liquid level meter provided in the self-priming test tank 10, or other devices capable of indicating a liquid level.

The total volume of the self-priming test tank 10 is known to be a fixed value, and the liquid level height in the self-priming test tank 10 can be read by the liquid level detection device 13, the liquid volume in the self-priming test tank 10 can be calculated by the liquid level height and the bottom area of the self-priming test tank 10, and then the gas volume can be calculated according to the total volume of the self-priming test tank 10 and the liquid volume in the self-priming test tank 10.

The gas volume in the self-priming test tank 10 can be calculated by the liquid level detection device 13, so that the gas volume in the self-priming test tank 10 can be conveniently adjusted, and the gas volume in the self-priming test tank 10 is equal to the volume in the water pipe of the conventional self-priming test table before the test is started.

With continued reference to fig. 1 and 2, the self-priming test canister 10 includes a canister body, an inlet air outlet disposed at the top of the canister body, and a drain disposed at the bottom of the canister body. The tank body can store liquid and gas and can bear negative pressure when the self-priming pump 11 to be tested works without obvious deformation. The air inlet and outlet on the tank body is used for allowing air to enter or be discharged out of the tank body, and the liquid outlet on the tank body is used for allowing liquid in the tank body to flow out.

When liquid is injected into the tank body, gas in the tank body is discharged to the outside of the tank body through the gas inlet and outlet. When the liquid in the tank body is discharged to the outside of the tank body through the liquid outlet, the gas outside the tank body enters the tank body through the gas inlet and outlet. The user can regulate the volume of gas in the self-priming test canister 10 through the gas inlet and outlet ports on the canister body.

And the air inlet and outlet are provided with air valves 14, when the air inlet valves are opened, air outside the tank body can enter the tank body, and air inside the tank body can be discharged to the outside of the tank body. The liquid outlet is provided with a liquid valve 15, and when the liquid valve 15 is opened, the liquid in the tank body can flow out from the liquid outlet. When this self priming pump testing arrangement is tested the self priming ability of the self priming pump 11 that awaits measuring, gas valve 14 and liquid valve 15 are all closed, and the self priming pump 11 during operation that awaits measuring can make jar internal negative pressure that forms with the internal gas suction of jar.

Referring to fig. 1, the self-priming test tank 10 and the self-priming pump 11 to be tested are communicated through a first pipeline 16, that is, one end of the first pipeline 16 is communicated with the self-priming test tank 10, and the other end of the first pipeline 16 is communicated with an inlet of the self-priming pump 11 to be tested. Fig. 1 shows the vacuum detection device 12 disposed on the first pipe 16, although the vacuum detection device 12 may also be disposed at the outlet of the self-priming test tank 10 or the inlet of the self-priming pump 11 to be tested.

The first pipe 16 is provided with a first valve 17. When first valve 17 is opened, first pipeline 16 will inhale test tank 10 and the self priming pump 11 intercommunication that awaits measuring, inhale test tank 10 and the self priming pump 11 disconnection that awaits measuring when first valve 17 is closed.

When the vacuum degree detection device 12 is arranged on the first pipeline 16 as shown in fig. 1, the vacuum degree detection device 12 is located between the first valve 17 and the outlet of the self-priming test tank 10, and after the first valve 17 is closed, the vacuum degree detection device 12 is not affected when the self-priming pump to be tested works, so that the vacuum degree detection device 12 can be effectively protected, and the service life of the vacuum degree detection device 12 is prolonged.

Fig. 3 is a schematic view of the overall structure of a water pump testing device according to an embodiment of the present invention, and as shown in fig. 3, the self-priming pump testing device further includes a liquid storage tank 18, and liquid such as water, lubricating oil or alcohol is stored in the liquid storage tank 18. The self priming pump 11 that awaits measuring communicates with liquid reserve tank 18, and the entry and the export of the self priming pump 11 that awaits measuring promptly all communicate with liquid reserve tank 18. When the self-priming pump 11 to be tested works, 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 from the self-priming pump 11 to be tested.

Be provided with first manometer 19 between the liquid outlet of liquid reserve tank 18 and the entry of the self priming pump 11 that awaits measuring, be provided with second manometer 20 between the inlet of liquid reserve tank 18 and the export of the self priming pump 11 that awaits measuring.

The first pressure gauge 19 can measure the liquid pressure at the inlet of the self-priming pump 11 to be measured, and the second pressure gauge 20 can measure the liquid pressure at the outlet of the self-priming pump. The lift of the self-priming pump 11 to be tested can be calculated according to 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. Specifically, the head calculation formula of the self-priming pump 11 to be measured is as follows:

H＝h+(P2-P1)/ρg

wherein, H is the lift of the self priming pump 11 that awaits measuring, and H is the vertical distance between first manometer 19 and the second manometer 20, and P1 is the liquid pressure of the self priming pump 11 entrance that awaits measuring, and P2 is the liquid pressure of the self priming pump 11 exit that awaits measuring, and ρ is the density of liquid, and g is acceleration of gravity.

With continued reference to fig. 3, a flow rate detection device 21 is disposed between the outlet of the self-priming pump 11 to be tested and the inlet of the liquid storage tank 18.

Wherein, flow detection device 21 is specifically a device that can detect the flow at the outlet of self priming pump 11 that awaits measuring such as liquid vortex flowmeter, orifice plate flowmeter, bayonet flowmeter. The flow rate detection device 21 can detect the flow rate of the outlet of the self-priming pump.

The performance parameters of the self-priming pump 11 to be measured include lift, flow and power. The lift of the self-priming pump 11 to be tested can be calculated according to 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 flow rate of the self-priming pump 11 to be measured can be obtained according to the flow rate detection device 21. The power of the self-priming pump 11 to be tested can be calculated according to the current and the voltage of the self-priming pump 11 to be tested during working. So, this self priming pump testing arrangement can enough test the self priming ability of the self priming pump 11 that awaits measuring, the self priming pump 11 that awaits measuring promptly highly with from inhaling the time, can test the performance parameter of the self priming pump 11 that awaits measuring again, the self priming pump 11's that awaits measuring promptly lift, flow and power use this self priming pump testing arrangement can replace current self priming pump performance testboard and self priming pump from inhaling the testboard, and the test is more convenient and high-efficient.

Continuing to refer to fig. 3, the inlet of the self-priming pump 11 to be tested and the liquid outlet of the liquid storage tank 18 are communicated with each other through a second pipeline 22, that is, one end of the second pipeline 22 is communicated with the liquid outlet of the liquid storage tank 18, and the other end of the second pipeline 22 is communicated with 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 this self priming pump testing arrangement test awaits measuring self priming pump 11's lift and flow, open out liquid valve 23, make second pipeline 22 with the liquid outlet of liquid reserve tank 18 and the entry intercommunication of the self priming pump 11 that awaits measuring, the self priming pump 11 that awaits measuring can be with the liquid suction in the liquid reserve tank 18, and then makes first manometer 19, second manometer 20 and flow detection device 21 can test corresponding parameter.

With continued reference to fig. 3, the first pipe 16 is connected to the second pipe 22 through a three-way connection 24, the first valve 17 is located between the three-way connection 24 and the self-priming test canister 10, and the outlet valve 23 is located between the three-way connection 24 and the 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 the self-priming capability of the self-priming pump 11 to be tested is tested, the first valve 17 is opened, and the liquid outlet valve 23 is closed.

And, first manometer 19 is located between tee bend interface 24 and the entry of the self priming pump 11 that awaits measuring, and first manometer 19 is more close to the entry of the self priming pump 11 that awaits measuring, and the liquid pressure of the self priming pump 11 entry that awaits measuring that first manometer 19 measures is more accurate.

Be provided with check valve 25 between the entry of the self priming pump 11 that awaits measuring and the first manometer 19, the flow direction of inside liquid is the self priming pump 11 that awaits measuring towards when check valve 25 opens. When the self-priming pump 11 to be tested is started or stopped, the liquid in the second pipeline 22 may flow backwards, and the check valve 25 can prevent the liquid in the second pipeline 22 from flowing backwards, so that the backflow liquid is prevented from damaging the first pressure gauge 19.

Continuing to refer to fig. 3, the outlet of the self-priming pump 11 to be tested is communicated with the liquid inlet of the liquid storage tank 18 through a third pipeline 26, that is, one end of the third pipeline 26 is communicated with the outlet of the self-priming pump 11 to be tested, and the other end of the third pipeline 26 is communicated with the liquid inlet of the liquid storage tank 18. And, the second pressure gauge 20 is disposed on the third pipeline 26, and then the second pressure gauge 20 can measure the liquid pressure at the outlet of the self-priming pump 11 to be measured.

With continued reference to FIG. 3, a second valve 27 is disposed in the third pipe 26, and the second pressure gauge 20 and the flow rate detecting device 21 are both located between the second valve 27 and the outlet of the self-primer pump 11 to be tested.

When this self priming pump testing arrangement tests the performance of the self priming pump 11 that awaits measuring, closes second valve 27 earlier, and the self priming pump 11 that awaits measuring starts the back, opens and adjusts second valve 27, makes the liquid reserve tank 18 and the liquid flow between the self priming pump 11 that awaits measuring remain stable, then reads first manometer 19, second manometer 20 and flow detection device 21's numerical value.

In the description of the embodiments of the present invention, it should be understood that the terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, an indirect connection through intervening media, a connection between two elements, or an interaction between two elements, unless expressly stated or limited otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. The terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing and simplifying the description, but do not indicate or imply that the referred devices or elements must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. In the description of the present invention, "a plurality" means two or more unless specifically stated otherwise.

The terms "first," "second," "third," "fourth," and the like in the description and in the claims of the present application and in the drawings described above, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.