Testing device for constant flow valve

Abstract

The utility model discloses a testing device for a constant flow valve, which comprises a water pump, a check valve, a hose, a first manual regulating valve, a second manual regulating valve, a third manual regulating valve, an electromagnetic flowmeter, a pressure difference transmitter, the constant flow valve and a water tank, the other end of the hose is connected with the water inlet end of a check valve, the water outlet end of the check valve is provided with a third water pipe connected with one end of a first manual adjusting valve, and the third water pipe is provided with a first pipe connector connected with one end of a second manual adjusting valve. A fifth water pipe connected with one end of an electromagnetic flowmeter is arranged at the other end of the first manual regulating valve, and a sixth water pipe connected with one end of a constant flow valve is arranged at the other end of the electromagnetic flowmeter. By means of the mode, the testing device of the constant flow valve achieves testing of performance of the constant flow valve under different pressure difference conditions, and ensures accuracy of testing results.

Description

Technical Field

[0001] The utility model relates to the testing field of constant flow valves, in particular to a testing device for constant flow valves. Background Art

[0002] In an air conditioning system, a constant flow valve is required to maintain a constant flow rate and ensure a constant flow rate of the system under changing environmental conditions. Therefore, a reliable constant flow valve is crucial for maintaining the efficiency and comfort of the air conditioning system.

[0003] To ensure that the performance indicators and quality of the constant flow valve meet the requirements of design and manufacturing, testing of the constant flow valve is necessary. In the prior art, usually only a flow meter can be used for simple testing of the constant flow valve, but the change of differential pressure cannot be carried out, and the performance test of the constant flow valve cannot be realized under changing pressure conditions. In addition, the vibration of the water pump will also interfere with the test, resulting in inaccurate data, which needs to be improved. Summary of the Utility Model

[0004] The main technical problem to be solved by the utility model is to provide a testing device for a constant flow valve, which can carry out the change of differential pressure and the performance test of the constant flow valve, reduce the vibration interference problem of the water pump, and improve the accuracy of the test.

[0005] To solve the above technical problem, a technical solution adopted by the utility model is: to provide a testing device for a constant flow valve, including: a water pump, a check valve, a hose, a first manual regulating valve, a second manual regulating valve, a third manual regulating valve, an electromagnetic flow meter, a differential pressure transmitter, a constant flow valve and a water tank. A first water pipe connected to the water tank is arranged at the water inlet end of the water pump, a second water pipe connected to one end of the hose is arranged at the water outlet end of the water pump, the other end of the hose is connected to the water inlet end of the check valve, a third water pipe connected to one end of the first manual regulating valve is arranged at the water outlet end of the check valve, a first pipe joint connected to one end of the second manual regulating valve is arranged on the third water pipe, a fourth water pipe extending into the water tank is arranged at the other end of the second manual regulating valve, a fifth water pipe connected to one end of the electromagnetic flow meter is arranged at the other end of the first manual regulating valve, a sixth water pipe connected to one end of the constant flow valve is arranged at the other end of the electromagnetic flow meter, a seventh water pipe connected to one end of the third manual regulating valve is arranged at the other end of the constant flow valve, an eighth water pipe extending into the water tank is arranged at the other end of the third manual regulating valve, a ninth water pipe connected to the sixth water pipe is arranged at the positive pressure end of the differential pressure transmitter, and a tenth water pipe connected to the seventh water pipe is arranged at the negative pressure end of the differential pressure transmitter.

[0006] In a preferred embodiment of the utility model, the hose is an explosion-proof hose.

[0007] In a preferred embodiment of the present utility model, the first water pipe, the second water pipe, the third water pipe, the fourth water pipe, the fifth water pipe, the sixth water pipe, the seventh water pipe, the eighth water pipe, the ninth water pipe and the tenth water pipe are respectively made of rigid water pipes.

[0008] In a preferred embodiment of the present utility model, it further includes a water discharge valve, and a second pipe joint connected to one end of the water discharge valve is provided on the seventh water pipe.

[0009] In a preferred embodiment of the present utility model, the first pipe joint and the second pipe joint are respectively made of three-way pipe joints.

[0010] In a preferred embodiment of the present utility model, the water pump is a horizontal centrifugal pump.

[0011] In a preferred embodiment of the present utility model, a first pressure gauge is provided on the second water pipe, and a second pressure gauge is provided on the fifth water pipe.

[0012] In a preferred embodiment of the present utility model, a third pressure gauge is provided on the sixth water pipe, and a fourth pressure gauge is provided on the seventh water pipe.

[0013] The beneficial effects of the present utility model are as follows: A test device for a constant flow valve pointed out by the present utility model can change the pressure difference at both ends of the constant flow valve by adjusting the opening degrees of the first manual regulating valve, the second manual regulating valve and the third manual regulating valve, and uses a differential pressure transmitter to monitor the pressure difference in real time. The flow rate passing through the constant flow valve under different pressure difference conditions is counted by an electromagnetic flowmeter, so as to realize the test of the performance of the constant flow valve, ensuring the comprehensiveness and accuracy of the test results. Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings, where:

[0015] Figure 1 is a schematic structural diagram of a preferred embodiment of a test device for a constant flow valve of the present utility model;

[0016] Figure 2 is Figure 1 a top view of Detailed Embodiments

[0017] The technical solutions in the embodiments of the present utility model will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0018] Please refer to Figures 1 - 2 , the embodiments of the present utility model include:

[0019] As Figure 1 shown, a test device for a constant flow valve, including: a water pump 1, a check valve 3, a hose 27, a first manual regulating valve 4, a second manual regulating valve 26, a third manual regulating valve 8, an electromagnetic flowmeter 5, a differential pressure transmitter 6, a constant flow valve 7, and a water tank 2. A first water pipe 11 connected to the water tank 2 is provided at the water inlet end of the water pump 1. In this embodiment, the water pump 1 is a horizontal centrifugal pump, and the water pump 1 is horizontally fixed on the platform at the bottom of the water tank 2 and fixed by bolts, with stable structure.

[0020] A second water pipe 12 connected to one end of the hose 27 is provided at the water outlet end of the water pump 1, and the other end of the hose 27 is connected to the water inlet end of the check valve 3. In this embodiment, the hose 27 is an explosion-proof hose, reducing the transmission of the vibration of the water pump 1 to the check valve 3, thereby ensuring the stable operation of the electromagnetic flowmeter 5 and the differential pressure transmitter 6 and the output of data.

[0021] A third water pipe 13 connected to one end of the first manual regulating valve 4 is provided at the water outlet end of the check valve 3. A first pipe joint 25 connected to one end of the second manual regulating valve 26 is provided on the third water pipe 13. The other end of the second manual regulating valve 26 is provided with a fourth water pipe 14 extending into the water tank 2, facilitating the adjustment of pressure reduction and water return.

[0022] A fifth water pipe 15 connected to one end of the electromagnetic flowmeter 5 is provided at the other end of the first manual regulating valve 4. A sixth water pipe 16 connected to one end of the constant flow valve 7 is provided at the other end of the electromagnetic flowmeter 5. The electromagnetic flowmeter 5 is used to count the flow rate output through the constant flow valve 7.

[0023] A seventh water pipe 17 connected to one end of the third manual regulating valve 8 is provided at the other end of the constant flow valve 7. The other end of the third manual regulating valve 8 is provided with an eighth water pipe 18 extending into the water tank 2, guiding the water flow passing through the constant flow valve 7 into the water tank 2 for recycling. In order to change the water or perform maintenance, it is necessary to empty the water tank 2, and a drain valve 10 also needs to be installed. A second pipe joint 9 connected to one end of the drain valve 10 is provided on the seventh water pipe 17. Open the water pump 1 and the drain valve 10 to empty the water flow in the water tank 2. In this embodiment, the first pipe joint 25 and the second pipe joint 9 are respectively three-way pipe joints, facilitating assembly.

[0024] A ninth water pipe 19 connected to the sixth water pipe 16 is provided at the positive pressure end of the differential pressure transmitter 6, and a tenth water pipe 20 connected to the seventh water pipe 17 is provided at the negative pressure end of the differential pressure transmitter 6 to detect the pressure difference across the constant flow valve 7.

[0025] The first water pipe 11, the second water pipe 12, the third water pipe 13, the fourth water pipe 14, the fifth water pipe 15, the sixth water pipe 16, the seventh water pipe 17, the eighth water pipe 18, the ninth water pipe 19 and the tenth water pipe 20 are respectively made of rigid water pipes, which have good pressure-bearing effect and high structural stability, avoiding adverse effects on water pressure changes.

[0026] As Figure 2 shown, a first pressure gauge 21 is provided on the second water pipe 12, and a second pressure gauge 22 is provided on the fifth water pipe 15 to monitor the pressure at both ends of the first manual regulating valve 4. A third pressure gauge 23 is provided on the sixth water pipe 16, and a fourth pressure gauge 24 is provided on the seventh water pipe 17 to monitor the pressure at both ends of the constant flow valve 7.

[0027] For convenient testing, the differential pressure transmitter 6 and the electromagnetic flowmeter 5 can be respectively connected to a controller with a built-in touch screen to display the differential pressure and flow rate.

[0028] Testing process;

[0029] Turn on the water pump 1 to deliver the water in the water tank 2 to the constant flow valve 7 of the air conditioning system to be tested. By adjusting the opening degrees of the first manual regulating valve 4, the second manual regulating valve 26 and the third manual regulating valve 8, and cooperating with the data of the differential pressure transmitter 6, change the pressure difference across the constant flow valve 7, and use the electromagnetic flowmeter 5 to monitor the flow rate. If the flow rate through the constant flow valve 7 does not change or the change is less than the allowable flow difference under different differential pressure regulations, it is determined that the performance of the constant flow valve is qualified; if the flow rate change through the constant flow valve 7 is greater than the allowable flow difference under different differential pressure regulations, it is determined that the performance of the constant flow valve is unqualified.

[0030] In summary, a testing device for a constant flow valve pointed out by the present utility model is convenient to assemble and adjust, can obtain the flow rate change of the constant flow valve in the differential pressure environment under different working conditions of the air conditioning system, and realizes the comprehensive performance test of the constant flow valve.

[0031] The above are only the embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification of the present utility model, or directly or indirectly applied to other related technical fields, shall be similarly included in the patent protection scope of the present utility model.

Claims

1. A test device for a constant flow valve, characterized in that: include: A water pump, a check valve, a hose, a first manual regulating valve, a second manual regulating valve, a third manual regulating valve, an electromagnetic flowmeter, a differential pressure transmitter, a constant flow valve and a water tank, wherein the water inlet end of the water pump is provided with a first water pipe connected to the water tank, the water outlet end of the water pump is provided with a second water pipe connected to one end of the hose, the other end of the hose is connected to the water inlet end of the check valve, the water outlet end of the check valve is provided with a third water pipe connected to one end of the first manual regulating valve, the third water pipe is provided with a first pipe joint connected to one end of the second manual regulating valve, the second manual regulating valve is provided with a second pipe joint connected to one end of the second manual regulating valve, and the second manual regulating valve is provided with a third water pipe connected to one end of the first manual regulating valve. A fourth water pipe extending into the water tank is provided at one end, a fifth water pipe connected to one end of the electromagnetic flowmeter is provided at the other end of the first manual regulating valve, a sixth water pipe connected to one end of the constant flow valve is provided at the other end of the electromagnetic flowmeter, a seventh water pipe connected to one end of the third manual regulating valve is provided at the other end of the constant flow valve, an eighth water pipe extending into the water tank is provided at the other end of the third manual regulating valve, a ninth water pipe connected to the sixth water pipe is provided at the positive pressure end of the differential pressure transmitter, and a tenth water pipe connected to the seventh water pipe is provided at the negative pressure end of the differential pressure transmitter.

2. The constant flow valve testing device according to claim 1, characterized in that: The hose is an explosion-proof hose.

3. The testing device for a constant flow valve according to claim 1, characterized in that: The first water pipe, the second water pipe, the third water pipe, the fourth water pipe, the fifth water pipe, the sixth water pipe, the seventh water pipe, the eighth water pipe, the ninth water pipe and the tenth water pipe are respectively made of hard water pipes.

4. The testing device for a constant flow valve according to claim 1, characterized in that: It also includes a drain valve, and the seventh water pipe is provided with a second pipe joint connected to one end of the drain valve.

5. The constant flow valve testing device according to claim 1, characterized in that: The first pipe joint and the second pipe joint are respectively three-way pipe joints.

6. The testing device for a constant flow valve according to claim 1, characterized in that: The water pump is a horizontal centrifugal pump.

7. The testing device for a constant flow valve according to claim 1, characterized in that: The second water pipe is provided with a first pressure gauge, and the fifth water pipe is provided with a second pressure gauge.

8. The testing device for a constant flow valve according to claim 1, characterized in that: The sixth water pipe is provided with a third pressure gauge, and the seventh water pipe is provided with a fourth pressure gauge.

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