CN205748898U - A kind of flow characteristics of regulating valve closed loop test system - Google Patents

Abstract

This utility model relates to a kind of flow characteristics of regulating valve closed loop test system, is sequentially connected is formed by water tank, multistage pump unit, vacuum tank, multistage test cell and backwater back pressure pipeline, and backwater back pressure back of pipeline connects water tank and forms closed loop；Multistage pump unit is composed in parallel by a plurality of water supply line, and every water supply line sets pipeline pump respectively；Multistage test cell is composed in parallel by a plurality of test line, and every test line is respectively used to install the tested regulation valve of corresponding bore, the test line of tested regulation valve both sides sets pressure point respectively and connects 2 pressure interfaces of corresponding differential pressure transmitter；Converter, differential pressure transmitter connect computer data processing system respectively.This utility model is reasonable in design, simple for structure, multiple test polytype and the test of bore regulation valve can be completed in same test system, and can automatic data collection, carry out data process by computer data processing system, substantially increase precision and the efficiency of test.

Description

A closed-loop test system for flow characteristics of regulating valves

technical field

The utility model relates to the technical field of valve flow testing, in particular to a closed-loop testing system for regulating valve flow characteristics.

Background technique

At present, many domestic valve manufacturers are still in the stage of producing existing stereotyped products, and the research and development of valves only stays in the stage of imitating advanced products at home and abroad, and have not conducted in-depth research on the technical performance and structural rationality of valve products. , one of the main reasons is that the research and development strength of valve manufacturers is weak, and there is no good testing equipment to provide product-related technical parameters. Its test means and methods are relatively backward. The flow and pressure of the valve are recorded manually according to the instructions of the flow meter and pressure gauge. Large, low detection accuracy, long cycle, and the reliability of test results cannot be guaranteed. Therefore, the backwardness of valve characteristic testing methods has directly affected the core competitiveness of domestic valve products and the development of enterprises.

Contents of the invention

The utility model provides a closed-loop test system for regulating valve flow characteristics, which has a reasonable structure design and a simple structure, and can complete various tests of various types and caliber regulating valves in the same test system, and can automatically collect data. The computer data processing system performs data processing, which greatly improves the accuracy and efficiency of the test.

In order to achieve the above object, the utility model adopts the following technical solutions to realize:

A closed-loop test system for the flow characteristics of a regulating valve, which is composed of a water storage tank, a multi-stage pump unit, a pressure-stabilizing tank, a multi-stage test unit, and a backwater backpressure pipeline connected in sequence, and the backwater backpressure pipeline is connected back to the water storage tank to form Closed-loop circuit; the multistage pump unit is composed of multiple water supply pipelines connected in parallel, each water supply pipeline is provided with pipeline pumps with different power, head and flow rate, and the pipeline pumps are all controlled by frequency converters; the multistage test unit is composed of A plurality of test pipelines are connected in parallel, and each test pipeline is used to install the tested regulating valve of the corresponding caliber, and the test pipelines on both sides of the tested regulating valve are respectively provided with pressure points connected to the two pressure ports of the corresponding differential pressure transmitter ; The frequency converter and the differential pressure transmitter are respectively connected to the computer data processing system.

The water storage tank is a vertical water storage tank with a water inlet, connected to the water inlet pipeline through the water replenishment pump, a manual ball valve 1 is set on the water inlet pipe before the water replenishment pump, and an electric ball valve is arranged on the water inlet pipe behind the water replenishment pump 1. A drain valve 1 is installed at the bottom of the water storage tank, a pressure relief valve 1 is installed at the top, and a liquid level transmitter is installed in the tank, which is connected to a computer data processing system.

The water supply pipeline before the pipeline pump is provided with a manual stop valve, and the water supply pipeline behind the pipeline pump is provided with a rubber expansion joint and a check valve in sequence.

The surge tank is a horizontal surge tank, and the surge tank is provided with a plurality of water diversion ports respectively connected to each test pipeline; the top of the surge tank is provided with a pressure relief valve 2, and the bottom is provided with a drain valve 2, and the side of the tank body is horizontally A pressure transmitter is provided, and the pressure transmitter is connected with a computer data processing system.

The regulating valves to be tested are detachably installed in the middle of each test pipeline. Manual ball valve 2, flow meter and electric regulating valve 1 are arranged in sequence on the test pipelines before the regulating valves to be tested. Set manual ball valve three and electric regulating valve two.

The caliber range of the tested regulating valve is DN15～DN450, and three kinds of measured regulating valves with adjacent calibers are divided into one group, that is, DN15～DN25, DN32～DN50, DN65～DN100, DN125～DN200, DN250～ DN350, DN400～DN450 have 6 sets of tested regulating valves; each set of tested regulating valves 11 is installed corresponding to the same test pipeline and tested separately, and connected to the test pipeline through reducing pipes and flanges.

The tail pipe of the return water back pressure pipe is connected to the upper water return port of the water storage tank through a vertical standpipe.

The computer data processing system includes a data acquisition module, a signal processing module, a logic circuit module, a central processing unit, a power supply module and a display screen, and the data acquisition module, a signal processing module, a logic circuit module, a power supply module and a display screen are respectively connected to the central processing unit.

Compared with the prior art, the beneficial effects of the utility model are:

1) The data acquisition accuracy is high, and the structural layout is reasonable, which ensures the accuracy of the flow characteristic during the test of the control valve and provides an accurate and reliable basis for the design of the control valve;

2) The closed-loop test system is adopted, and the water used as the test medium can be recycled repeatedly, which is clean, energy-saving and environmentally friendly;

3) It is convenient and easy to collect data such as pressure and flow of the regulating valve, which reduces the labor intensity of the test and improves the working efficiency of the valve test.

Description of drawings

Fig. 1 is a structural schematic diagram of a closed-loop test system for flow characteristics of a regulating valve described in the present invention.

In the figure: 1. Water storage tank 2. Manual stop valve 3. Pipeline pump 4. Rubber expansion joint 5. Check valve 6. Regulator tank 7. Pressure transmitter 8. Manual ball valve 9. Flowmeter 10. Electric Control valve 11. Measured control valve 12. Pressure point 13. Manual ball valve 3 14. Electric control valve 2 15. Pressure relief valve 16. Liquid level transmitter 17. Electric ball valve 18. Supplement pump 19. Manual Ball valve one 20. Backwater back pressure pipe 21. Differential pressure transmitter 22. Frequency converter

detailed description

The specific embodiment of the utility model will be further described below in conjunction with accompanying drawing:

As shown in Figure 1, it is a structural schematic diagram of the utility model. A closed-loop test system for the flow characteristics of a regulating valve described in the utility model consists of a water storage tank 1, a multi-stage pump unit, a surge tank 6, a multi-stage test unit and The backwater backpressure pipelines 20 are connected in sequence, and the backwater backpressure pipelines 20 are connected back to the water storage tank 1 to form a closed-loop circuit; the multi-stage pump unit is composed of multiple water supply pipelines connected in parallel, and each water supply pipeline is respectively equipped with different The pipeline pump 3 of power, head and flow rate is controlled by the frequency converter 22; the multi-stage test unit is composed of a plurality of test pipelines connected in parallel, and each test pipeline is used to install the measured regulating valve 11 of the corresponding caliber respectively. The test pipelines on both sides of the controlled valve 11 to be tested are respectively provided with pressure points 12 connected to two pressure ports corresponding to the differential pressure transmitter 21; the frequency converter 22 and the differential pressure transmitter 21 are respectively connected to the computer data processing system.

Described water storage tank 1 is a vertical water storage tank, is provided with water inlet on it, connects water inlet pipeline by replenishing water pump 18, establishes manual ball valve-19 on the water inlet pipeline before replenishing water pump 18, the water inlet behind replenishing water pump 18 An electric ball valve 17 is provided on the pipeline; a drain valve 1 is provided at the bottom of the water storage tank 1, a pressure relief valve 15 is provided at the top, a liquid level transmitter 16 is provided in the tank, and the liquid level transmitter 16 is connected to a computer data processing system.

The water supply pipeline before the pipeline pump 3 is provided with a manual stop valve 2, and the water supply pipeline behind the pipeline pump 3 is provided with a rubber expansion joint 4 and a check valve 5 in sequence.

Described surge tank is 6 horizontal surge tanks, and surge tank 6 is provided with a plurality of diversion ports and is connected with each test pipeline respectively; A pressure transmitter 7 is arranged horizontally on the side, and the pressure transmitter 7 is connected with a computer data processing system.

The measured regulating valve 11 is detachably installed in the middle of each test pipeline. On the test pipeline before the tested regulating valve 11, a manual ball valve 2 8, a flow meter 9 and an electric regulating valve 1 10 are sequentially arranged. The measured regulating valve 11 The last test pipeline is provided with manual ball valve three 13 and electric control valve two 14 in sequence.

The caliber range of the tested regulating valve 11 is DN15-DN450, and three kinds of tested regulating valves 11 with adjacent calibers are divided into one group, namely DN15-DN25, DN32-DN50, DN65-DN100, DN125-DN200, DN250～DN350, DN400～DN450, a total of 6 groups of tested regulating valves 11; each group of tested regulating valves 11 is installed corresponding to the same test pipeline and tested separately, and connected to the test pipeline through reducing pipes and flanges.

The tail pipe of the return water back pressure pipe 20 is connected to the upper water return port of the water storage tank 1 through a vertical standpipe.

The computer data processing system includes a data acquisition module, a signal processing module, a logic circuit module, a central processing unit, a power supply module and a display screen, and the data acquisition module, a signal processing module, a logic circuit module, a power supply module and a display screen are respectively connected to the central processing unit.

The purpose of this utility model is to provide a closed-loop test system for flow characteristics of regulating valves, which solves the problem of low detection accuracy, long cycle and reliable test results due to large flow and pressure fluctuations in the existing valve test, and the data is greatly affected by human factors. problem of poor sex.

In the utility model, the water storage tank 1 is connected with the surge tank 6 through a multi-stage pump unit, and the multiple test pipelines separated from the surge tank 6 are collected into the backwater back pressure pipeline 20, and finally the backwater back pressure The pressure pipe 20 returns and is connected to the water storage tank 1 to form a closed loop system. The concept of "front" and "rear" related to the installation of instrument equipment in the utility model is determined according to the direction of water flow.

The volume of the water storage tank 1 is determined according to the flow rate of the largest-diameter regulating valve 11 in the test pipeline.

The multi-stage pump unit includes a plurality of pipeline pumps 3 with different powers, lifts and flow rates. The control end of the pipeline pumps 3 is connected to a computer control system through a frequency converter 22 to control the speed and flow rate of the pumps.

The multi-stage test unit divides the tested regulating valves 11 of three adjacent calibers into one group, and each group is tested through the same test pipeline. It meets the pressure requirements of the pipe diameter and realizes quick connection through the flange.

After the tail pipe of the return water back pressure pipeline 20 is connected to a section of vertical standpipe, it is connected to the upper water return port of the water storage tank 1 to ensure the back pressure of the regulating valve 11 under test.

The working principle of a closed-loop test system for the flow characteristic of the regulating valve of the utility model is:

Take the test of the flow characteristics of a regulating valve of a certain caliber as an example. If the caliber of the regulating valve 11 under test is 300mm, first install the regulating valve 11 with a caliber of 300mm on the corresponding test pipeline of DN250～DN350.

Turn on the computer data processing system, and the system detects the water level in the tank through the liquid level transmitter 16 of the water storage tank 1. If the water level is low, the system will alarm and turn on the electric ball valve 17 and the replenishment pump 18 in turn to replenish water in the water storage tank until it reaches the standard Water level, the above process completes the water level inspection of the water storage tank 1.

Calculate the maximum flow rate of the 300mm caliber measured regulating valve 11, and determine to open the three pipeline pumps 3 in the multi-stage pump unit according to the calculation results. The computer data processing system controls the flow rate and frequency of each pipeline pump 3 through the frequency converter 22 .

After the pipeline pump 3 is turned on for a certain period of time, the computer data processing system extracts the value of the pressure transmitter 7 of the surge tank 6, and after the pressure in the surge tank 6 stabilizes to a certain pressure value for a certain period of time, the flow rate of the measured regulating valve 11 is started. Feature testing. Adjust the flow rate and pressure before and after the measured regulating valve 11 through the electric regulating valve 1 10 and electric regulating valve 2 14 on the test pipeline, and record the different openings of the measured regulating valve 11 in real time through the flow meter 9 and the differential pressure transmitter 21 Flow rate and differential pressure data. The computer data processing system performs background data processing, and finally presents the flow characteristic results on the display screen in the form of graphs.

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto. Any equivalent replacement or change of the new technical solution and its concept should be covered within the protection scope of the present utility model.

Claims (8)

1. a flow characteristics of regulating valve closed loop test system, it is characterised in that by water tank, multistage pump unit, vacuum tank, many Level test cell and backwater back pressure pipeline are sequentially connected composition, and backwater back pressure back of pipeline connects water tank and forms closed loop；Institute State multistage pump unit to be composed in parallel by a plurality of water supply line, every water supply line is respectively equipped with different capacity, lift, flow Pipeline pump, pipeline pump is by Frequency Converter Control；Described multistage test cell is composed in parallel by a plurality of test line, every testing tube Line is respectively used to install the tested regulation valve of corresponding bore, the test line of tested regulation valve both sides sets pressure point respectively and connects 2 pressure interfaces of corresponding differential pressure transmitter；Converter, differential pressure transmitter connect computer data processing system respectively.

A kind of flow characteristics of regulating valve closed loop test system the most according to claim 1, it is characterised in that described water tank For vertical water tank, it sets water inlet, connect inlet channel by small pump, the inlet channel before small pump sets manual ball Valve one, the inlet channel after small pump sets electrical ball valve one；Setting blowoff valve one bottom water tank, top sets relief valve one, tank The internal fluid level transmitter that sets, fluid level transmitter is connected with computer data processing system.

A kind of flow characteristics of regulating valve closed loop test system the most according to claim 1, it is characterised in that described pipeline pump It is equipped with hand stop valve on front water supply line, the water supply line after pipeline pump is sequentially provided with rubber expansion joint and non-return Valve.

A kind of flow characteristics of regulating valve closed loop test system the most according to claim 1, it is characterised in that described vacuum tank For horizontal vacuum tank, vacuum tank is provided with multiple bleeder and is connected with each bar test line respectively；Vacuum tank top sets relief valve two, Bottom sets blowoff valve two, is provided with pressure transmitter tank body side horizontal, and pressure transmitter is with computer data processing system even Connect.

A kind of flow characteristics of regulating valve closed loop test system the most according to claim 1, it is characterised in that described tested tune Joint valve be removably mounted in the middle part of each bar test line, the test line before tested regulation valve sets successively manual ball valve two, Effusion meter and electric control valve one, the test line after tested regulation valve sets manual ball valve three and electric control valve two successively.

A kind of flow characteristics of regulating valve closed loop test system the most according to claim 1, it is characterised in that described tested tune Joint valve bore scope be DN15～DN450,3 kinds of adjacent bore tested regulation valves are divided into one group, i.e. have DN15～DN25, DN32～DN50, DN65～DN100, DN125～DN200, DN250～DN350, DN400～DN450 totally 6 groups of tested regulation valves； Often organize the corresponding same test line of tested regulation valve (11) install and test respectively, by reducer pipe and flange and test Pipeline connects.

A kind of flow characteristics of regulating valve closed loop test system the most according to claim 1, it is characterised in that described backwater is carried on the back The rear pipeline of pressure pipeline connects the top water return outlet of water tank by a vertical standpipe.

A kind of flow characteristics of regulating valve closed loop test system the most according to claim 1, it is characterised in that computer data Processing system includes data acquisition module, signal processing module, application of logic circuit module, central processing unit, power module and display Screen, data acquisition module, signal processing module, application of logic circuit module, power module and display screen connect central processing unit respectively.