CN221803372U - A valve flow resistance test device - Google Patents

Abstract

The valve flow resistance test device comprises a water tank, a water outlet pipeline, an electric control valve, a variable frequency pump set, a temperature sensor, a pressure stabilizing container, a valve front control valve, an electromagnetic flowmeter, a valve front pressure gauge, a valve quick-opening clamping device and a valve rear pressure gauge, wherein the water outlet pipeline is provided with the electric control valve; a pressure stabilizing container is additionally arranged between the variable frequency pump set and the pipeline of the test valve, a temperature sensor and a pressure sensor are arranged in the pressure stabilizing container, and the temperature and the pressure of a test medium are monitored in real time; the pressure stabilizing device has the advantages of stable pressure of the test pipeline and small fluctuation of data of instruments and meters.

Description

A valve flow resistance test device

Technical Field

The utility model relates to the technical field of quality detection, in particular to a valve flow rate and flow resistance test device.

Background Art

The flow resistance coefficient and flow coefficient of a valve are important indicators for measuring the flow capacity of the valve. The flow resistance coefficient of a valve is a dimensionless coefficient of the valve pressure loss, which reflects the flow resistance or energy loss of the medium through the valve. The larger the flow coefficient, the stronger the flow capacity of the valve and the smaller the pressure loss of the medium through the valve.

When conducting valve flow resistance tests, the following problems exist:

In the traditional valve flow and resistance test, the water pump directly pressurizes the water supply, the test pipeline pressure is stable, and the instrument data fluctuates greatly;

Traditional valve flow and resistance tests mostly use a spread-out multi-pipeline test system, which occupies a large area;

The measurement of traditional valve flow and flow resistance tests generally adopts the following method: manually adjusting the opening of the pipeline valve while observing and recording the pressure and flow data, and then analyzing and calculating to finally obtain the net differential pressure, flow coefficient, and flow resistance coefficient of the sample valve at different flow rates. The test data has large errors.

Summary of the invention

The utility model aims to provide a valve flow rate and flow resistance test device.

In order to achieve the above purpose, the technical solution of the utility model is:

A valve flow resistance test device, characterized in that it comprises a water tank and a control box, the outlet of the water tank is connected to the inlet of a water outlet pipeline, the water outlet pipeline is provided with an electric control valve, the outlet of the water outlet pipeline is connected to the inlet of a variable frequency pump group, the outlet of the variable frequency pump group is connected to the inlet of a pressure-stabilizing container through a first water supply pipeline, the pressure-stabilizing container is provided with a temperature sensor and a pressure sensor, the outlet of the pressure-stabilizing container is connected to the inlet of a second water supply pipeline through a first reducing flange, the second water supply pipeline is provided with a pre-valve control valve, an electromagnetic flow control valve, a pressure sensor ... The control box is respectively electrically connected to the electric control valve, the variable frequency pump group, the temperature sensor, the pressure sensor, the control valve before the valve, the electromagnetic flowmeter, the pressure gauge before the valve, the pressure gauge after the valve and the electric control valve.

Furthermore, the valve quick-opening clamping device is located on a lifting bracket.

Furthermore, a differential pressure transmitter is provided between the pre-valve pressure gauge and the post-valve pressure gauge, and the differential pressure transmitter is electrically connected to the control box.

Furthermore, a pipeline expansion joint is provided on the outlet side of the second water supply pipeline.

Furthermore, the outlet of the variable frequency pump group is connected to the second reflux port of the water tank through a second reflux pipeline.

Furthermore, the second reflux pipeline is provided with a reflux control valve.

This device adds a pressure-stabilizing container between the pipeline from the variable frequency pump group to the test valve. The temperature and pressure sensors are installed in the pressure-stabilizing container to monitor the temperature and pressure of the test medium in real time. Compared with the direct pressurization water supply method of the water pump in the traditional valve flow and resistance test bench, this device has the advantages of stable test pipeline pressure and small fluctuation of instrument data.

Reducer flanges are set in the pipelines before and after the sample valve. Compared with the traditional spread-out multi-pipeline test system, this device occupies a small area. For the test of valves with different calibers, the flange reducer module is used to quickly replace the corresponding caliber pipeline, which has strong applicability;

The electric control regulating valve is used to remotely adjust the pipeline valve opening, realize the measurement of the differential pressure of the sample valve under different flow rates, and cooperate with the real-time collection of flow, pressure and pressure difference data, and then upload them for analysis and processing, so as to realize the online rapid and accurate calculation of the net differential pressure, flow coefficient and flow resistance coefficient of the sample valve.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the system structure of the utility model.

Reference numerals:

1 Electric control valve, 2 Reflux control valve, 3 Frequency conversion pump group, 4 Pressure stabilizing container, 5 Temperature sensor,

6 pressure sensor, 7 first reducing flange, 8 pre-valve control valve, 9 electromagnetic flowmeter, 10 lifting bracket,

11 differential pressure transmitter, 12 pressure gauge before valve, 13 pressure gauge after valve, 14 valve quick opening clamping device,

15 valve sample, 16 pipe expansion joint, 17 electric regulating valve, 18 water supply pipe loop, 19 second reducing flange,

20 water tank, 21 control box, 22 water outlet pipeline, 23 second water supply pipeline, 24 first return pipeline,

25 Second return line.

DETAILED DESCRIPTION

The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of them. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

The utility model discloses a valve flow and flow resistance test device, as shown in FIG1, comprising a water tank 20 and a control box 21, the outlet of the water tank 20 is communicated with the inlet of a water outlet pipeline 22, the water outlet pipeline 22 is provided with an electric control valve 1, the outlet of the water outlet pipeline 22 is connected to the inlet of a variable frequency pump group 3, and a plurality of variable frequency pumps can automatically switch pumps of different powers according to the different calibers of the sample valves to quickly reach the flow required by the test.

The outlet of the variable frequency pump group 3 is connected to the inlet of the pressure stabilizing container 4 through the first water supply pipeline 18. The pressure stabilizing container 4 is provided with a temperature sensor 5 and a pressure sensor 6. The outlet of the variable frequency pump group 3 is also connected to the second reflux port of the water tank 20 through the second reflux pipeline 25. The second reflux pipeline 25 is provided with a reflux control valve 2.

The outlet of the pressure-stabilizing container 4 is connected to the inlet of the second water supply pipeline 23 through the first reducing flange 7. In one embodiment, the first reducing flange 7 has a large diameter on the side of the pressure-stabilizing container 4 and a small diameter on the side of the second water supply pipeline 23. The second water supply pipeline 23 is provided with a pre-valve control valve 8, an electromagnetic flowmeter 9, a pre-valve pressure gauge 12, a valve quick-opening clamping device 14 and a valve post-valve pressure gauge 13 in sequence. The valve quick-opening clamping device 14 clamps the valve sample 15, and the valve quick-opening clamping device 14 is installed on the lifting bracket 10.

As shown in Figure 1, the outlet of the second water supply pipeline 23 is connected to the inlet of the first return pipeline 24 through the second reducing flange 19. In one embodiment, the second reducing flange 19 is small-diameter on the second water supply pipeline 23 side and large-diameter on the first return pipeline 24 side. An electric regulating valve 17 is provided at the inlet of the first return pipeline 24. The outlet of the first return pipeline 24 is connected to the first return port of the water tank 20. A pipe expansion joint 16 is provided on the outlet side of the second water supply pipeline 23, and the length of the second water supply pipeline 23 can be adjusted by the pipe expansion joint 16.

The control box 21 is electrically connected to the electric control valve 1, the variable frequency pump group 3, the temperature sensor 5, the pressure sensor 6, the pre-valve control valve 8, the electromagnetic flowmeter 9, the pre-valve pressure gauge 12, the post-valve pressure gauge 13 and the electric regulating valve 17 respectively.

As shown in FIG1 , a differential pressure transmitter 11 is provided between the pre-valve pressure gauge 12 and the post-valve pressure gauge 13. The differential pressure transmitter 11 is electrically connected to the control box 21. The device of the utility model adjusts various components through the control box 21, can remotely control the pipeline valve opening, realize the measurement of the differential pressure of the valve sample 15 under different flow rates, and can realize the online rapid and accurate calculation of the net differential pressure, flow coefficient and flow resistance coefficient of the valve sample 15 by coordinating the real-time collection of flow, pressure and differential pressure data and uploading them to the built-in program on the PC for analysis and processing.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims (6)

1. The utility model provides a valve flow resistance test device, its characterized in that includes water tank and control box, the export of water tank and outlet pipe way's entry intercommunication, outlet pipe way is equipped with electric control valve, outlet pipe way's export and the entry linkage of variable frequency pump package, the export of variable frequency pump package is through the entry intercommunication of first supply pipe and steady voltage container, steady voltage container is equipped with temperature sensor and pressure sensor, steady voltage container's export is through the entry switching of first reducing flange and second supply pipe, be equipped with valve front control valve, electromagnetic flowmeter, valve front pressure table, valve fast-opening clamping device and valve back pressure table on the second supply pipe way in proper order, valve fast-opening clamping device centre gripping valve sample, the export of second supply pipe way is through the entry switching of second reducing flange and first return line, the entrance of first return line is equipped with electric control valve, the export and the first return line intercommunication of water tank, the control box is connected with electric control valve, variable frequency pump package, temperature sensor, pressure sensor, valve front control valve, electromagnetic flowmeter, electric pressure table front pressure table and electric control valve back pressure table respectively.

2. The valve flow resistance test device of claim 1, wherein the valve quick-opening clamp device is located on a lifting bracket.

3. The valve flow resistance test device according to claim 1, wherein a differential pressure transmitter is arranged between the pre-valve pressure gauge and the post-valve pressure gauge, and the differential pressure transmitter is electrically connected with the control box.

4. The valve flow resistance test device according to claim 1, wherein the outlet side of the second water supply line is provided with a pipe retractor.

5. The valve flow resistance test device of claim 1, wherein the outlet of the variable frequency pump set is in communication with a second return port of the water tank via a second return line.

6. The valve flow resistance test device of claim 5, wherein the second return line is provided with a return control valve.