Test board for testing self-priming of self-priming pump

Abstract

The invention discloses a test board for testing self-priming of a self-priming pump, and relates to the technical field of test boards. The water storage tank is further included, the upper end of the water storage tank is communicated with an upper pipe, the lower end of the water storage tank is communicated with a lower pipe, the upper pipe is provided with a first water storage level water drainage hole, and the lower pipe comprises a first vertical pipe, a first transverse pipe communicated with the first vertical pipe, a second vertical pipe communicated with the first transverse pipe and a second transverse pipe communicated with the second vertical pipe; the first horizontal pipe is provided with a drain hole, the second vertical pipe is provided with a second water storage level drain hole, and the second horizontal pipe is provided with a vacuum pressure gauge and a self-priming pump test interface. The device is simple in structure and low in manufacturing cost, and can complete the test task of the self-priming pump with high quality.

Description

Technical Field

[0001] The present invention relates to the technical field of test benches, and more particularly to a test bench for testing the self-priming of a self-priming pump. Background Art

[0002] The working principle of a self-priming pump is that the pump casing is filled with water before the pump starts (or there is water in the pump casing itself). After starting, the impeller rotates at a high speed, causing the water flow in the impeller channels to flow towards the volute. At this time, a vacuum is formed at the inlet, which opens the inlet check valve, allowing the air in the suction pipe to enter the pump and reach the outer edge through the impeller channels. Currently, self-priming pumps have been widely used in various industries.

[0003] Therefore, the quality of the self-priming pump is very crucial, and one of the keys to ensuring quality is the performance test of the self-priming pump. However, the existing devices for testing the self-priming of self-priming pumps are not only complex in structure but also high in cost, and thus need to be improved urgently. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a test bench for testing the self-priming of a self-priming pump, so as to overcome the defects of complex structure and high cost in the existing test benches for testing the self-priming of self-priming pumps.

[0005] To solve the above technical problem, the test bench for testing the self-priming of a self-priming pump according to the present invention includes a self-priming pump for testing; it further includes a water storage tank, the upper end of the water storage tank is connected to an upper pipe, the lower end of the water storage tank is connected to a lower pipe, the upper pipe is provided with a first water storage level water discharge hole, the lower pipe includes a first vertical pipe, a first horizontal pipe connected to the first vertical pipe, a second vertical pipe connected to the first horizontal pipe, and a second horizontal pipe connected to the second vertical pipe; the first horizontal pipe is provided with a drainage hole, the second vertical pipe is provided with a second water storage level water discharge hole, and the second horizontal pipe is provided with a vacuum pressure gauge and a self-priming pump test interface.

[0006] Wherein, the test bench for testing the self-priming of a self-priming pump further includes a connecting rod, and the connecting rod connects the upper pipe and the second vertical pipe.

[0007] Wherein, the first water storage level water discharge hole and the second water storage level water discharge hole are on the same horizontal line.

[0008] Wherein, a gas storage chamber is formed between the top end of the upper pipe and the first water storage level water discharge hole.

[0009] Wherein, the distance between the top end of the upper pipe and the first water storage level water discharge hole is 100 mm.

[0010] Wherein, an air suction chamber is formed between one end of the lower pipe and the second water storage level water discharge hole.

[0011] Wherein, the length of the air suction chamber is 1000 mm.

[0012] Wherein, the test bench for testing the self-priming of the self-priming pump further comprises a test bench support frame, and the test bench support frame is supported on the second transverse pipe.

[0013] Compared with the prior art, the beneficial effects of the present invention are that it not only has a simple structure and low manufacturing cost, but also can complete the test task of the self-priming pump with high quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the main structure of the test bench of the present invention;

[0015] Figure 2 is a first three-dimensional structural schematic diagram of the test bench of the present invention;

[0016] Figure 3 It is a second three-dimensional structural schematic diagram of the test bench of the present invention. DETAILED DESCRIPTION

[0017] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0018] The test bench for testing the self-priming of the self-priming pump of this embodiment is as follows Figures 1 to 3 As shown, it includes a self-priming pump for testing (not shown in the figure). During the test, the self-priming pump is connected to the self-priming pump test interface 1. It also includes a water tank 2, the upper end of the water tank is connected to the upper tube 3, the lower end of the water tank is connected to the lower tube 4, the upper tube is provided with a first water storage level drain hole 5, an air storage chamber 6 is formed between the top of the upper tube and the first water storage level drain hole, and the spacing between the top of the upper tube 7 and the first water storage level drain hole is 100mm, that is, forming a water vapor boundary 8 of the air storage chamber. The lower tube includes a first vertical tube 9, a first horizontal tube 10 connected to the first vertical tube, a second vertical tube 11 connected to the first horizontal tube, and a second horizontal tube 12 connected to the second vertical tube; the first horizontal tube is provided with a drainage hole 13, the second vertical tube is provided with a second water storage level drain hole 14, and an air suction chamber is formed between one end 15 of the lower tube and the second water storage level drain hole, and the length of the air suction chamber is 1000mm, that is, forming a water vapor boundary 16 of the air suction chamber. The first water storage level drain hole and the second water storage level drain hole are on the same horizontal line. The second horizontal pipe is provided with a vacuum pressure gauge 17 and a self-priming pump test interface. The test bench for testing the self-priming of the self-priming pump also includes a connecting rod 18 for strengthening the connection effect, and the connecting rod connects the upper pipe and the second vertical pipe. The test bench for testing the self-priming of the self-priming pump also includes a test bench support frame 19, and the test bench support frame is supported on the second horizontal pipe.

[0019] Working principle of this embodiment: According to the Clapeyron equation, the volume of air will increase as the pressure decreases, and the relationship is: pressure x volume = constant; the initial pressure of the air storage chamber of the test bench is atmosphere, and when the pressure in the system changes to 0.1 atmosphere, the volume of the air storage chamber becomes 10 times the original volume.

[0020] Equal volume replacement: The volume of the original suction chamber is 9 times the volume of the air storage chamber; when the volume of the air storage chamber becomes 10 times the original volume, the water in the water storage tank will be replaced by gas, and the water in the water storage tank will fill the space in the suction chamber until the self-priming pump takes in water.

[0021] The original state of the test bench is guaranteed: when water is poured into the test bench, the drain holes are closed, and the drain holes at the water-gas boundary of the suction chamber and the water-gas boundary of the gas storage chamber (the first water storage level drain hole and the second water storage level drain hole) are opened until water flows out of the drain holes to ensure that the part below the drain holes is filled with water and the part above is gas, and then the drain holes are closed.

[0022] The relationship between the working conditions of the test and the working conditions on site: the working condition record of the test, the vacuum value and the time corresponding to the vacuum value. The relationship with the site: the vacuum value can be used directly on site, and the time corresponding to the vacuum value should know the volume of the suction chamber on site. The volume of the site is divided by the volume of the suction chamber tested and then multiplied by the time to get the self-priming time on site.

[0023] When this embodiment is used: the test bench support frame is used for placement and fixing; before the test, it is necessary to ensure that the test bench is in the original state (the original state is that the water in the test bench begins to flow out of the drain hole, at this time the air in the suction chamber and the air storage chamber are standard atmospheric pressure gas, and the water storage tank is quasi-atmospheric pressure liquid); when working, the self-priming pump is installed at the self-priming pump test interface, the drain hole and the drainage hole are closed, and at the beginning the self-priming pump absorbs the gas in the suction chamber, the gas pressure in the suction chamber drops, and the gas pressure in the air storage chamber is greater than the pressure in the suction chamber, forcing the liquid in the water storage tank to flow into the suction chamber until the pressure is balanced, and the pressure of the gas in the air storage chamber drops due to the increase in volume. Due to the principle of force, the pressure in the suction chamber drops, and the value of the vacuum pressure gauge and the self-priming time of the self-priming pump are recorded to complete the test.

[0024] This embodiment not only has a simple structure and low manufacturing cost, but also can complete the test task of the self-priming pump with high quality.

[0025] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A test bench for testing the self-priming of a self-priming pump, comprising a self-priming pump for testing; characterized in that: It also includes a water storage tank, the upper end of the water storage tank is connected to the upper pipe, the lower end of the water storage tank is connected to the lower pipe, the upper pipe is provided with a first water storage level drain hole, the lower pipe includes a first vertical pipe, a first horizontal pipe connected to the first vertical pipe, a second vertical pipe connected to the first horizontal pipe, and a second horizontal pipe connected to the second vertical pipe; the first horizontal pipe is provided with a drainage hole, the second vertical pipe is provided with a second water storage level drain hole, and the second horizontal pipe is provided with a vacuum pressure gauge and a self-priming pump test interface.

2. The test bench for testing the self-priming of a self-priming pump according to claim 1, characterized in that: The test bench for testing the self-priming of the self-priming pump also includes a connecting rod, which connects the upper pipe and the second vertical pipe.

3. The test bench for testing the self-priming of a self-priming pump according to claim 1 or 2, characterized in that: The first water storage level drain hole and the second water storage level drain hole are on the same horizontal line.

4. The test bench for testing the self-priming of a self-priming pump according to claim 1, characterized in that: An air storage chamber is formed between the top end of the upper tube and the first water storage level drain hole.

5. The test bench for testing the self-priming of a self-priming pump according to claim 4, characterized in that: The distance between the top end of the upper tube and the first water storage level drain hole is 100 mm.

6. The test bench for testing the self-priming of a self-priming pump according to claim 1, characterized in that: An air suction chamber is formed between one end of the lower pipe and the second water storage level drain hole.

7. The test bench for testing the self-priming of a self-priming pump according to claim 6, characterized in that: The length of the suction chamber is 1000 mm.

8. The test bench for testing the self-priming of a self-priming pump according to claim 1, characterized in that: The test bench for testing the self-priming of the self-priming pump also includes a test bench support frame, and the test bench support frame is supported on the second transverse pipe.

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