CN113847233A - Water pump displacement testing system and method - Google Patents

Abstract

The invention belongs to the technical field of water pump detection, and discloses a water pump displacement testing system and a method. And a third pipeline and a fourth pipeline which are communicated with the second pipeline and the second mixing barrel are respectively provided with a fourth switch valve and a fifth switch valve, and the connection points of the third pipeline and the fifth pipeline are respectively positioned at two sides of the third switch valve. And the gas collecting barrel is communicated with a second exhaust valve of the tested water pump, and the volume of the gas collecting barrel is smaller than that of the second mixing barrel. And a water injection pipe communicated with the gas collecting barrel, wherein a sixth switch valve is arranged on the water injection pipe. And the fifth pipeline is provided with a seventh switch valve and is communicated with the water injection pipe and the first pipeline. Not only can detect whether the water pump to be detected can exhaust, but also can quantify the exhaust capacity of the water pump to be detected.

Description

Water pump displacement testing system and method

Technical Field

The invention belongs to the technical field of water pump detection, and particularly relates to a water pump displacement testing system and method.

Background

The water pump is a machine for conveying liquid or pressurizing liquid, and is also applied to fuel gas, and the water pump is used as important fuel gas special equipment in the fuel gas, and the superiority and accuracy of product performance are determined by the waterway circulation of the whole machine operation.

At present, the exhaust performance test of a water pump is to install the water pump in a system, restart the system, and then observe whether an exhaust valve of the water pump exhausts, so as to verify whether the water pump can exhaust normally, but this is only to test whether the water pump can exhaust normally, and it is difficult to quantify the gas exhausted by the water pump, that is, when a certain amount of gas is filled in the system, how much gas the water pump exhausts is unknown.

Therefore, a system and a method for testing the displacement of a water pump are needed to solve the above-mentioned problems.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide a water pump air displacement testing system and a water pump air displacement testing method, so as to solve the problem that the air discharged by a water pump is difficult to quantify in the prior art.

In order to achieve the above object, the present application provides a water pump displacement test system, including:

the first mixing barrel is communicated with a first pipeline and a second pipeline, a first switch valve is arranged on the first pipeline, a second switch valve and a third switch valve are sequentially arranged on the second pipeline along the direction far away from the first mixing barrel, and the first pipeline and the second pipeline can be connected with a water pump to be tested;

the top of the second mixing barrel is provided with a first exhaust valve;

the third pipeline and the fourth pipeline are communicated with the second pipeline and the second mixing barrel, a fourth switch valve and a fifth switch valve are respectively arranged on the third pipeline and the fourth pipeline, and connection points of the third pipeline and the second pipeline and connection points of the fourth pipeline and the second pipeline are respectively positioned on two sides of the third switch valve;

the gas collecting barrel can be communicated with a second exhaust valve of the water pump to be detected, the gas collecting barrel is communicated with a vertically arranged communicating pipe, the communicating pipe is higher than the gas collecting barrel, and the volume of the gas collecting barrel is smaller than that of the second mixing barrel;

a water injection pipe; the water injection pipe is communicated with the gas collecting barrel, and a sixth switch valve is arranged on the water injection pipe;

a fifth pipeline, on which a seventh switch valve is arranged, the fifth pipeline is communicated with the water injection pipe and the first pipeline, and the sixth switch valve is positioned between the fifth pipeline and the gas collecting barrel;

and the gas injection pipe is provided with an eighth switch valve and is connected to a second pipeline between the second switch valve and the first mixing barrel.

As a preferred technical scheme of a water pump displacement test system, the first mixing barrel is a transparent barrel, and scale marks are arranged on the first mixing barrel; the second pipeline is connected to the bottom of the first mixing barrel.

As a preferred technical scheme of a water pump displacement test system, the second mixing barrel is a transparent barrel.

As an optimal technical scheme of the water pump displacement testing system, the gas collecting barrel is a transparent barrel, and scale marks are arranged on the gas collecting barrel.

As a preferable technical solution of a water pump air displacement test system, the water pump air displacement test system further includes three pressure detectors, one of the three pressure detectors is disposed in the second pipeline and is located between the second switch valve and the first mixing barrel; one pressure detector is arranged on the second pipeline and is positioned between the third switch valve and a connection point of the second pipeline and the measured water pump, and the other pressure detector is arranged on the fifth pipeline.

As a preferred technical solution of the water pump displacement test system, the water pump displacement test system further includes a flow meter, and the flow meter is disposed on the second pipeline.

As a preferred technical scheme of a water pump displacement test system, the water pump displacement test system further comprises a pressure relief valve, and the pressure relief valve is arranged on the second pipeline.

As a preferred technical scheme of a water pump displacement test system, the water pump displacement test system further comprises a pressure reducing valve, and the pressure reducing valve is arranged on the water injection pipe.

As an optimal technical scheme of the water pump air displacement testing system, the water pump air displacement testing system further comprises an air pipe, one end of the air pipe is connected to the second exhaust valve, and the other end of the air pipe is connected to the gas collecting barrel.

In order to achieve the above object, the present invention further provides a water pump displacement test method, which adopts the water pump displacement test system in any of the above schemes, and the water pump displacement test method includes:

s1, opening a first switch valve, a second switch valve, a third switch valve, a fourth switch valve, a fifth switch valve, a sixth switch valve and a seventh switch valve, closing an eighth switch valve, and injecting water into a water injection pipe until the gas collecting barrel is filled with water and the water is continuously injected;

s2, closing the third switch valve and the sixth switch valve, starting the water pump to be detected, and exhausting by the first exhaust valve until the second mixing barrel is filled with water;

s3, closing the tested water pump, closing the first switch valve, the second switch valve, the fourth switch valve, the fifth switch valve and the seventh switch valve, and opening the eighth switch valve to inject gas with preset volume and preset pressure into the second pipeline;

s4, closing the eighth switch valve, opening the first switch valve, the second switch valve, the third switch valve and the seventh switch valve, opening the water pump to be detected, and exhausting by the second exhaust valve until the liquid level of the gas collecting barrel keeps unchanged;

and S5, acquiring the volume of the gas in the gas collecting barrel, and calculating the ratio of the volume of the gas in the gas collecting barrel to the preset volume.

Compared with the prior art, the invention has the following beneficial effects:

the water pump air displacement test system is filled with water into the whole system through the water injection pipe. And then closing the third switch valve and the sixth switch valve, starting the water pump to be tested until the first mixing barrel is filled with water, in the process, always filling water into the water filling pipe, driving the water to flow in the first pipeline, the second pipeline, the first mixing barrel and the second mixing barrel along with the water pump, and discharging air in the system through the first exhaust valve when the air passes through the second mixing barrel. When the first mixing barrel is full of water, the whole system is full of water, and the air is basically completely discharged. And then the tested water pump is closed, the first switch valve, the second switch valve, the fourth switch valve, the fifth switch valve and the seventh switch valve are closed, water injection is stopped, and the eighth switch valve is opened to inject gas with preset pressure and preset volume into the second pipeline. And then closing the eighth switch valve, opening the first switch valve, the second switch valve, the third switch valve and the seventh switch valve, and starting the water pump to be detected until the liquid level of the gas collecting barrel is kept unchanged. In the process, water in the pipeline enters the gas collecting barrel through a second exhaust valve of the tested water pump. And finally, acquiring the volume of the gas in the gas collecting barrel, and calculating the ratio of the volume of the gas in the gas collecting barrel to the preset volume. Compared with the prior art, the device not only can detect whether the tested water pump can exhaust, but also can quantify the exhaust capacity of the tested water pump.

Drawings

Fig. 1 is a schematic structural diagram of a water pump displacement test system provided in this embodiment.

Wherein:

1. a first mixing tub; 2. a second mixing tub; 21. a first exhaust valve; 3. a gas collection barrel; 4. a communicating pipe; 5. a water injection pipe; 6. a gas injection pipe;

71. a first on-off valve; 72. a second on-off valve; 73. a third on-off valve; 74. a fourth switching valve; 75. a fifth on-off valve; 76. a sixth switching valve; 77. a seventh on-off valve; 78. an eighth on-off valve;

8. a pressure detector;

9. a flow meter;

10. an air tube;

11. a pressure reducing valve;

12. a pressure relief valve;

13. a water pump to be tested;

101. a first pipeline; 102. a second pipeline; 103. a third pipeline; 104. a fourth pipeline; 105. and a fifth pipeline.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of 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.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships that are conventionally placed when the products of the present invention are used, and are used only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the devices or elements to be referred to must have specific orientations, be constructed in specific orientations, and operate, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

The embodiment provides a water pump displacement test system for test the exhaust capacity of hanging stove water pump. Specifically, as shown in fig. 1, the water pump air displacement test system includes a first mixing barrel 1, a second mixing barrel 2, a gas collecting barrel 3, a water injection pipe 5, a gas injection pipe 6, a first pipeline 101, a second pipeline 102, a third pipeline 103, a fourth pipeline 104, and a fifth pipeline 105.

The first mixing barrel 1 is communicated with a first pipeline 101 and a second pipeline 102, the first pipeline 101 is provided with a first switch valve 71, the second pipeline 102 is sequentially provided with a second switch valve 72 and a third switch valve 73 along the direction far away from the first mixing barrel 1, and the first pipeline 101 and the second pipeline 102 can be connected with the water pump 13 to be measured. The top of the second mixing barrel 2 is provided with a first exhaust valve 21, the third pipeline 103 and the fourth pipeline 104 are both communicated with the second pipeline 102 and the second mixing barrel 2, the third pipeline 103 and the fourth pipeline 104 are respectively provided with a fourth switch valve 74 and a fifth switch valve 75, and the connection points of the third pipeline 103 and the fourth pipeline 104 with the second pipeline 102 are respectively positioned at two sides of the third switch valve 73. Gaseous collecting vessel 3 intercommunication is surveyed the second discharge valve of water pump 13, and gaseous collecting vessel 3 intercommunication has the communicating pipe 4 of vertical setting, and communicating pipe 4 is higher than gaseous collecting vessel 3, and the volume of gaseous collecting vessel 3 is less than the volume of second mixing vessel 2. The water injection pipe 5 is communicated with the gas collecting barrel 3, and a sixth switch valve 76 is arranged on the water injection pipe 5. The fifth pipeline 105 is provided with a seventh switch valve 77, the fifth pipeline 105 is communicated with the water injection pipe 5 and the first pipeline 101, and the sixth switch valve 76 is positioned between the connection point of the fifth pipeline 105 and the water injection pipe 5 and the gas collecting barrel 3. The eighth switching valve 78 is provided on the gas injection pipe 6, and the gas injection pipe 6 is connected to the second pipe 102 between the second switching valve 72 and the first mixing tub 1.

Note that, in the present embodiment, the connection point of the third line 103 and the second line 102 is located between the second on-off valve 72 and the third on-off valve 73. The connection point of the fifth pipe 105 to the first pipe 101 is located between the first mixing tub 1 and the first switching valve 71. In addition, in the present embodiment, the second pipeline 102 is located at the bottom of the first mixing tub 1, and the first pipeline 101 is located at the top of the first mixing tub 1. In addition, in the present embodiment, the third pipeline 103 and the fourth pipeline 104 are both located at the bottom of the first mixing tub 1.

Further, this water pump displacement test system still includes trachea 10, and trachea 10 one end is connected in second discharge valve, and the other end is connected in gas collecting vessel 3. Preferably, in this embodiment, the gas pipe 10 is connected to the top of the gas collecting tub 3.

It can be understood that the water pump air displacement test system is filled with water through the water injection pipe 5. And then the third switch valve 73 and the sixth switch valve 76 are closed, the tested water pump 13 is started until the first mixing barrel 1 is filled with water, water is always filled into the water filling pipe 5 in the process, the water is driven by the water pump to flow in the first pipeline 101, the second pipeline 102, the first mixing barrel 1 and the second mixing barrel 2, and air in the system is discharged through the first exhaust valve 21 when passing through the second mixing barrel 2. When the first mixing tub 1 is filled with water, it means that the entire system is filled with water and the air is substantially completely discharged. Then, the measured water pump 13 is turned off, the first, second, fourth, fifth and seventh switching valves 71, 72, 74, 75 and 77 are closed, the water injection is stopped, and the eighth switching valve 78 is opened to inject the gas of the preset pressure and the preset volume into the second pipe 102. And then closing the eighth switch valve 78, opening the first switch valve 71, the second switch valve 72, the third switch valve 73 and the seventh switch valve 77, and starting the tested water pump 13 until the liquid level of the gas collecting barrel 3 is kept unchanged. In the process, the water in the pipeline enters the gas collecting barrel 3 through a second exhaust valve of the tested water pump 13. And finally, acquiring the volume of the gas in the gas collecting barrel, and calculating the ratio of the volume of the gas in the gas collecting barrel 3 to the preset volume.

Note that since the outside of communication pipe 4 is at atmospheric pressure, the gas of the injected preset pressure needs to be calculated by converting the gas to a volume corresponding to the atmospheric pressure.

In addition, it is preferable that both of the first exhaust valve and the second exhaust valve be automatic exhaust valves. The first, second, fourth, fifth, seventh and eighth switching valves 71, 72, 74, 75, 77 and 78 are preferably ball valves. This water pump displacement test system compares prior art, not only can detect and be surveyed water pump 13 and can not exhaust, can also quantify the exhaust ability of being surveyed water pump 13.

Further, in the present embodiment, the first mixing barrel 1 is preferably a transparent barrel, and the first mixing barrel 1 is provided with scale marks. With first blending bucket 1 set up to transparent bucket to set up the scale mark, after injecting gas into second pipeline 102 through gas injection pipe 6, gas density is little to in the rebound gets into first blending bucket 1, be convenient for at this moment observe the volume that enters into the gas in first blending bucket 1 and calculate the gaseous volume of injecting. Of course, in other embodiments, the volume and pressure of the injected gas can be determined when the gas is injected through the gas injection pipe 6, the pressure can be detected through a pressure gauge, and the volume can be calculated by setting the flow meter 9 to detect the flow rate and the time for injecting the air.

Further, in the present embodiment, the second mixing tub 2 is preferably a transparent tub. So set up, can be convenient for observe whether fill with water in the second blending barrel 2, and then be convenient for judge whether the air in the system is completely discharged. Of course, in other embodiments, a liquid level sensor may be disposed at the top of the second mixing barrel 2, and the liquid level in the second mixing barrel 2 may be detected by the liquid level sensor.

In addition, in this embodiment, the volume in the second mixing barrel 2 is greater than the volume of the first mixing barrel 1, so when the first mixing barrel 1 is filled with water, the second mixing barrel 2 is not filled with water, and in the working process of the measured water pump 13, along with the continuous injection of water, the air in the pipeline is gathered above the second mixing barrel 2 and is discharged through the first exhaust valve 21.

Further, in the present embodiment, the gas collecting barrel 3 is preferably a transparent barrel, and the gas collecting barrel 3 is provided with scale marks. So set up, be convenient for calculate get gaseous volume in getting into gas collecting vessel 3. In other embodiments, however, the measurement can also be carried out by means of other measuring tubes which are provided with a scale and are filled with water, in which case the gas collecting vessel 3 is connected to the measuring tube after the end of the test.

Referring to fig. 1 again, the water pump displacement test system further includes three pressure detectors 8, wherein one of the pressure detectors 8 is disposed on the second pipeline 102 and located between the second switch valve 72 and the first mixing tub 1, one of the pressure detectors 8 is disposed on the second pipeline 102 and located between the third switch valve 73 and a connection point of the second pipeline 102 and the water pump 13 to be tested, and the other pressure detector 8 is disposed on the fifth pipeline 105.

By arranging the pressure detector 8, the pressure in the second pipeline 102 and the pressure in the fifth pipeline 105 can be detected in real time, and the normal work of the water pump air displacement testing system is ensured. In addition, the pressure change can be observed by the pressure detector 8 located between the second switching valve 72 and the first mixing tub 1 after the gas is injected into the second pipe 102 through the gas injection pipe 6.

Further, the water pump air displacement test system further comprises a flow meter 9, and the flow meter 9 is arranged on the second pipeline 102. Specifically, the flow meter 9 is located between the second on-off valve 72 and the third on-off valve 73. The flow rate in the whole system is detected in real time by setting the flow meter 9.

Further, the water pump displacement test system further comprises a pressure relief valve 12, and the pressure relief valve 12 is arranged on the second pipeline 102. Specifically, the pressure relief valve 12 is located between the second switching valve 72 and the first mixing tub 1. The pressure in the entire system is stabilized by providing a pressure relief valve 12.

Further, this water pump displacement test system still includes relief pressure valve 11, and relief pressure valve 11 sets up on water injection pipe 5. The pressure of water in the entire system is stabilized by providing a pressure reducing valve 11 on the water feed pipe 5.

The embodiment further provides a water pump displacement test method, and the water pump displacement test system is adopted, and specifically, the water pump displacement test method includes:

s1, the first, second, third, fourth, fifth, sixth, and seventh switching valves 71, 72, 73, 74, 75, 76, and 77 are opened, the eighth switching valve 78 is closed, and water is injected into the water injection pipe 5 until the gas collection tub 3 is filled with water and the water injection is continued.

And S2, closing the third switch valve 73 and the sixth switch valve 76, starting the tested water pump 13, and exhausting the first exhaust valve until the second mixing barrel 2 is filled with water.

After water is injected into the whole system through the water injection pipe 5, the gas collection barrel 3 is filled with water, at the moment, the third switch valve 73 and the sixth switch valve 76 are closed, the detected water pump 13 is started, the detected water pump 13 drives water to circularly flow in the first pipeline 101, the first mixing barrel 1, the second pipeline 102, the third pipeline 103, the fourth pipeline 104 and the second mixing barrel 2, and because the first exhaust valve 21 is arranged at the top of the second mixing barrel 2, air in the system can be gathered at the top of the second mixing barrel 2 and exhausted through the first exhaust valve 21 when passing through the second mixing barrel 2, and when the second mixing barrel 2 is filled with water, the air in the whole system can be exhausted.

S3, the tested water pump 13 is turned off, the first, second, fourth, fifth and seventh on-off valves 71, 72, 74, 75 and 77 are turned off, and the eighth on-off valve 78 is turned on to inject the gas with the preset volume and the preset pressure into the second pipe 102.

After the air in the whole system is exhausted, the gas with the preset volume and the pre-pressure is injected into the system through the gas injection pipe 6, namely, the air is artificially injected into the system.

S4, closing the eighth switch valve 78, opening the first switch valve 71, the second switch valve 72, the third switch valve 73 and the seventh switch valve 77, opening the tested water pump 13, and exhausting gas by the second exhaust valve until the liquid level of the gas collecting barrel 3 is kept unchanged.

After injecting air into the system, the first switch valve 71, the second switch valve 72, the third switch valve 73 and the seventh switch valve 77 are opened, and the water pump 13 to be measured is turned on, and since the second mixing barrel 2 is filled with water, the air in the system is discharged into the gas collecting barrel 3 through the second exhaust valve and occupies a part of the space of the gas collecting barrel 3.

And S5, acquiring the volume of the gas in the gas collecting barrel 3, and calculating the ratio of the volume of the gas in the gas collecting barrel 3 to the preset volume.

Note that, in step S3, the air is injected at a preset pressure, and the gas in the gas collecting barrel 3 is at a volume under atmospheric pressure, so that the volume of the injected gas and the volume of the gas in the gas collecting barrel 3 need to be converted to the same pressure and then be subjected to a ratio, thereby obtaining the exhaust capacity of the water pump 13 to be measured.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims (10)

1. A water pump displacement test system, characterized by, includes:

the water pump device comprises a first mixing barrel (1), a first pipeline (101) and a second pipeline (102) are communicated with each other, a first switch valve (71) is arranged on the first pipeline (101), a second switch valve (72) and a third switch valve (73) are sequentially arranged on the second pipeline (102) along the direction far away from the first mixing barrel (1), and the first pipeline (101) and the second pipeline (102) can be connected with a water pump (13) to be measured;

a first exhaust valve (21) is arranged at the top of the second mixing barrel (2);

a third pipeline (103) and a fourth pipeline (104), wherein the third pipeline (103) and the fourth pipeline (104) are both communicated with the second pipeline (102) and the second mixing barrel (2), a fourth switch valve (74) and a fifth switch valve (75) are respectively arranged on the third pipeline (103) and the fourth pipeline (104), and connection points of the third pipeline (103) and the fourth pipeline (104) and the second pipeline (102) are respectively positioned at two sides of the third switch valve (73);

the gas collecting barrel (3) can be communicated with a second exhaust valve of the water pump (13) to be detected, the gas collecting barrel (3) is communicated with a vertically arranged communicating pipe (4), the communicating pipe (4) is higher than the gas collecting barrel (3), and the volume of the gas collecting barrel (3) is smaller than that of the second mixing barrel (2);

a water injection pipe (5); the gas collecting barrel (3) is communicated with the water injection pipe (5), and a sixth switch valve (76) is arranged on the water injection pipe;

a fifth pipeline (105) provided with a seventh switch valve (77), wherein the fifth pipeline (105) is communicated with the water injection pipe (5) and the first pipeline (101), and the sixth switch valve (76) is positioned between the fifth pipeline (105) and the gas collecting barrel (3);

and the gas injection pipe (6) is provided with an eighth switch valve (78), and the gas injection pipe (6) is connected to a second pipeline (102) between the second switch valve (72) and the first mixing barrel (1).

2. The water pump displacement test system of claim 1, wherein the first mixing barrel (1) is a transparent barrel, and scale marks are arranged on the first mixing barrel (1); the second pipeline (102) is connected to the bottom of the first mixing barrel (1).

3. The water pump displacement test system of claim 1, wherein the second mixing barrel (2) is a transparent barrel.

4. The water pump air displacement test system according to claim 1, wherein the gas collecting barrel (3) is a transparent barrel, and scale marks are arranged on the gas collecting barrel (3).

5. The water pump displacement test system of claim 1, further comprising three pressure detectors (8), wherein one of the pressure detectors (8) is disposed in the second pipeline (102) and between the second on-off valve (72) and the first mixing tub (1); one pressure detector (8) is arranged on the second pipeline (102) and is positioned between the third on-off valve (73) and a connection point of the second pipeline (102) and the measured water pump (13), and the other pressure detector (8) is arranged on the fifth pipeline (105).

6. The water pump displacement test system of claim 1, further comprising a flow meter (9), the flow meter (9) being disposed on the second conduit (102).

7. The water pump displacement test system of claim 1, further comprising a pressure relief valve (12), the pressure relief valve (12) being disposed on the second conduit (102).

8. The water pump air displacement test system of claim 1, further comprising a pressure reducing valve (11), wherein the pressure reducing valve (11) is disposed on the water injection pipe (5).

9. The water pump air displacement test system of claim 1, further comprising an air pipe (10), wherein one end of the air pipe (10) is connected to the second air outlet valve, and the other end of the air pipe (10) is connected to the air collection barrel (3).

10. A water pump displacement test method, characterized in that the water pump displacement test system according to any one of claims 1 to 9 is used, and the water pump displacement test method comprises:

s1, opening a first switch valve, a second switch valve, a third switch valve, a fourth switch valve, a fifth switch valve, a sixth switch valve and a seventh switch valve, closing an eighth switch valve, and injecting water into a water injection pipe until the gas collecting barrel is filled with water and the water is continuously injected;

s2, closing the third switch valve and the sixth switch valve, starting the water pump to be detected, and exhausting by the first exhaust valve until the second mixing barrel is filled with water;

s3, closing the tested water pump, closing the first switch valve, the second switch valve, the fourth switch valve, the fifth switch valve and the seventh switch valve, and opening the eighth switch valve to inject gas with preset volume and preset pressure into the second pipeline;

s4, closing the eighth switch valve, opening the first switch valve, the second switch valve, the third switch valve and the seventh switch valve, opening the water pump to be detected, and exhausting by the second exhaust valve until the liquid level of the gas collecting barrel keeps unchanged;

and S5, acquiring the volume of the gas in the gas collecting barrel, and calculating the ratio of the volume of the gas in the gas collecting barrel to the preset volume.

Images