Pneumatic valve flow testing system

Abstract

The utility model relates to the technical field of valve performance test, and discloses a pneumatic valve flow test system, which comprises a multi-path gas source supply unit comprising a gas source supply assembly, a main pipeline and a shunting assembly which are sequentially connected in series, and the shunting assembly distributes gas of the main pipeline to at least two parallel test branches, each test branch is provided with an independent branch pressure reducing valve; the multi-range flow testing unit comprises gas mass flow meters which are respectively arranged on the testing branches, and the measuring ranges of the gas mass flow meters are different; the multi-size interface pipeline unit comprises quick connectors which are respectively arranged at the tail ends of the test branches and are used for being connected with a valve to be tested, and the sizes of the quick connectors are different; the actuator is connected with the to-be-tested valve and used for receiving the control signal and adjusting the opening degree of the valve; and the data acquisition and processing unit is electrically connected with the gas mass flow meter and the actuator. The pneumatic valve flow test system meets the rapid detection requirements of valves of different specifications.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of valve performance test especially relates to a pneumatic valve flow test system. BACKGROUND

[0002] In the design and manufacturing process of pneumatic valve, flow characteristic is one of the core indexes to measure its performance. Traditional design stage usually relies on simulation software such as computational fluid dynamics (CFD) to simulate flow, but there is a certain deviation between software simulation result and real flow, therefore for the valve (such as regulating valve, safety valve etc.) with flow and performance requirements, design parameters must be verified through experimental test and product performance must be ensured to meet the requirements.

[0003] At present, valve flow test mainly adopts single gas source single branch test method, that is, through single gas source gas supply, single flow meter measurement, however single flow meter is difficult to cover valve test requirements of different flow ranges, and the connection interface size of different specifications of valve is quite different, when facing valves of different sizes or flow ranges, traditional test system needs to frequently change flow meter and adapter, re-adjust pipeline and test equipment, which affects batch detection efficiency.

[0004] Therefore, traditional test system has the limitations of poor range adaptability and low test efficiency. UTILITY MODEL CONTENT

[0005] The main purpose of the utility model is to provide a pneumatic valve flow test system, which aims to solve the technical problems of poor range adaptability and low test efficiency of traditional test system.

[0006] To achieve the above purpose, the utility model provides a pneumatic valve flow test system, which comprises:

[0007] Multi-path gas source supply unit, comprising gas source supply assembly, main pipeline and shunt assembly connected in turn, the shunt assembly distributes the gas of main pipeline to at least two parallel test branches, each test branch is provided with independent branch pressure reducing valve;

[0008] Multi-range flow test unit, comprising gas mass flow meters respectively installed in each test branch, the range of each gas mass flow meter is different;

[0009] Multi-size interface pipeline unit, comprising quick couplings respectively installed at the ends of each test branch, used for connecting the valve to be tested, the sizes of each quick couplings are different;

[0010] Actuator, connected with the valve to be tested, used for receiving control signal and adjusting the opening of valve;

[0011] Data acquisition and processing unit, electrically connected with the gas mass flow meter and actuator.

[0012] Optionally, in an embodiment, the gas supply assembly comprises an air compressor and / or an air tank.

[0013] Optionally, in an embodiment, the air compressor is connected to the main pipeline through a filter pressure reducing valve.

[0014] Optionally, in an embodiment, the gas distribution assembly divides the gas in the main pipeline into four parallel test branches, and 1 / 4 inch, 3 / 8 inch, 1 / 2 inch and 3 / 4 inch quick connectors are respectively installed downstream of the four test branches.

[0015] The multi-range flow test unit comprises two thermal mass flow meters with different range ranges, one test branch is connected to one thermal mass flow meter, and the remaining three test branches are connected in parallel to the other thermal mass flow meter.

[0016] Optionally, in an embodiment, a check valve is arranged upstream of the gas mass flow meter.

[0017] Optionally, in an embodiment, a pulsation damper is arranged between the check valve and the gas mass flow meter, and the pulsation damper is a buffer cavity filled with porous material inside.

[0018] Optionally, in an embodiment, the actuator is an electric actuator or a pneumatic actuator.

[0019] Optionally, in an embodiment, a safety relief valve and a pressure sensor are arranged on the top of the air tank, and the pressure sensor is electrically connected to the data acquisition and processing unit.

[0020] Optionally, in an embodiment, the filter pressure reducing valve is provided with a manual adjusting handle, and the outlet pressure is displayed in real time by a digital pressure gauge.

[0021] Optionally, in an embodiment, straight pipe sections with a length not less than times of pipe diameter are arranged upstream and downstream of the gas mass flow meter.

[0022] The technical scheme provided by the utility model discloses, multiway gas supply unit passes through the test branch and independent branch pressure reducing valve in parallel, allows different test branch to adapt different pressure demand, does not need to adjust gas source parameter frequently, shortens test preparation time, multi -size interface pipeline unit adopts the quick -coupling of different sizes, directly matches a plurality of specifications valve interface, spares the step of changing adapter, improves efficiency significantly, multi -range flow test unit covers wider flow range through the configuration different range gas mass flowmeter, realizes dynamic test process automation through the real -time monitoring of data acquisition and processing unit, such as continuous test under different opening degrees, reduces artificial operation error and time cost, the pneumatic valve flow test system solves the problem that the range adaptability is poor and the test efficiency is low in the traditional test system, satisfies the quick detection demand of different specifications valve. BRIEF DESCRIPTION OF DRAWINGS

[0023] One or more embodiments are illustrated by way of example with reference to the accompanying drawings, which are schematic and not intended to be limiting of the embodiments, and in which like numerals designate similar items in the figures, the figures do not limit the embodiments to the scale of the drawings, and the figures are not intended to refer to a particular view of a particular embodiment, but are intended to refer to several illustrations of a generic embodiment.

[0024] Figure 1 It is a structure schematic view of one embodiment of the pneumatic valve flow test system of the utility model. DETAILED DESCRIPTION

[0025] In order to facilitate understanding of the utility model, the utility model is explained in more detail below in combination with the drawings and specific embodiments. It should be noted that when an element is described as "fixed to" another element, it can be directly on another element or one or more intervening elements can be present therebetween. When an element is described as "connected to" another element, it can be directly connected to another element or one or more intervening elements can be present therebetween. The terms "vertical", "horizontal", "left", "right", "inner", "outer" and similar expressions used in the specification are for illustrative purposes only. In the description of the utility model, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating relative importance, or implying the number of the indicated technical features. Therefore, unless otherwise specified, the features limited by "first", "second" can explicitly or implicitly include one or more of the features; the meaning of "multiple" is two or more. The term "include" and any variation thereof means non-exclusive inclusion, and one or more other features, integers, steps, operations, units, components and / or combinations thereof can be present or added.

[0026] Furthermore, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, can be fixedly connected, can be detachably connected, or integrally connected; can be mechanically connected, can be electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or internal communication of two elements. All technical and scientific terms used in the specification are the same as the meanings commonly understood by the skilled in the art of the utility model. The terms used in the specification of the utility model are only for the purpose of describing specific embodiments, not for limiting the utility model. The term "and / or" used in the specification includes any and all combinations of one or more related listed items.

[0027] In addition, the technical features involved in the different embodiments of the utility model described below can be combined with each other as long as there is no conflict between them.

[0028] As Figure 1 shown, the utility model embodiment provides a kind of multi-path parallel, multi-range adaptation, multi-interface compatible automated pneumatic valve flow test system, to improve test efficiency, expand flow test range, meet the rapid detection needs of different specifications valves.The pneumatic valve flow test system includes:

[0029] Multi-path gas supply unit, including gas supply assembly 11, main pipeline 12 and shunt component 13 connected in turn, shunt component 13 distributes the gas of main pipeline 12 to at least two parallel test branches, and each test branch is provided with independent branch pressure reducing valve 21;

[0030] Multi-range flow test unit, including gas mass flow meter 22 respectively installed in each test branch, and the range of each gas mass flow meter 22 is different;

[0031] Multi-size interface pipeline unit, including quick connector 31 respectively installed at the end of each test branch, for connecting valve to be measured, and the size of each quick connector 31 is different;

[0032] Actuator, connected with valve to be measured, for receiving control signal and adjusting the opening of valve;

[0033] Data acquisition and processing unit, electrically connected with gas mass flow meter 22 and actuator.

[0034] The multi-channel gas supply unit, through parallel test branches and independent branch pressure reducing valves 21, allows different test branches to adapt to different pressure requirements without frequent adjustments to gas source parameters, thus shortening test preparation time. The multi-size interface pipeline unit uses quick-connect fittings of different sizes to directly match various valve interfaces, eliminating the need to replace adapters and significantly improving efficiency. The multi-range flow test unit, by configuring gas mass flow meters 22 with different ranges, covers a wider flow range. By adjusting the valve opening through actuators and combining real-time monitoring by the data acquisition and processing unit, the dynamic test process is automated, such as continuous testing at different openings, reducing human error and time costs. This pneumatic valve flow test system solves the problems of poor range adaptability and low testing efficiency in traditional test systems, meeting the rapid testing needs of valves of different specifications.

[0035] The testing process is as follows: Select the corresponding test branch according to the flow range of the valve under test, and connect the valve under test to the corresponding quick connector 31; adjust the branch pressure reducing valve 21 to the target test pressure; control the valve to adjust the opening degree in a step manner through the actuator, and obtain the steady-state flow rate at each opening degree through the gas mass flow meter 22, including the leakage flow rate in the valve closed state, the maximum flow rate in the valve fully open state, and the transient flow rate change during the rapid opening and closing of the valve; the data acquisition and processing unit automatically generates the valve flow characteristic curve, outputs the opening degree-flow rate correspondence and the deviation analysis results from the design value.

[0036] Optionally, the gas supply assembly 11 includes an air compressor 111 and / or an air tank 112, which can be connected individually or together to the main pipeline 12 to provide a stable gas supply pressure.

[0037] The air compressor 111 is connected to the main pipeline 12 through the filter pressure reducing valve 113. The filter pressure reducing valve 113 can prevent contaminants from entering the test branch and causing damage to the flow meter, thereby improving the reliability of the test. At the same time, it can accurately control the input pressure of the main pipeline 12 to ensure that the test pressure meets the requirements. The filter pressure reducing valve 113 is equipped with a manual adjustment handle, and its outlet pressure is displayed in real time through a digital pressure gauge.

[0038] The air tank 112 pre-stores compressed air. When the air tank 112 is connected to the main pipeline 12 alone, the volume of the air tank 112 needs to be large enough to provide stable air source pressure during the test. When the air tank 112 and the air compressor 111 are connected to the main pipeline 12 in parallel, the air tank 112 can buffer the pressure fluctuation of the air compressor 111 output, ensure the stability of the air source pressure during the test, and reduce the interference on the test results. The top of the air tank 112 is provided with a safety relief valve and a pressure sensor. The safety relief valve automatically releases pressure when the air tank is over-pressurized. The pressure sensor is electrically connected to the data acquisition and processing unit and provides real-time feedback on the pressure state of the air tank.

[0039] In an embodiment, the shunt assembly 13 distributes the gas in the main pipeline 12 to four parallel test branches. The downstream of the four test branches are respectively provided with 1 / 4 inch, 3 / 8 inch, 1 / 2 inch, and 3 / 4 inch quick connectors 31. The multi-range flow test unit 20 includes two thermal mass flow meters with different ranges. One of the test branches is connected to one of the thermal mass flow meters, and the remaining three test branches are connected in parallel to the other thermal mass flow meter. This reduces the number of flow meters and lowers the cost while ensuring range coverage.

[0040] In another embodiment, the shunt assembly 13 distributes the gas in the main pipeline 12 to three parallel test branches. The three test branches are respectively provided with different types of gas mass flow meters 22, covering a flow range of 50-5000 SLPM, such as a thermal mass flow meter with a range of 0-50 SLPM, a Coriolis force flow meter with a range of 50-500 SLPM, and a turbine flow meter with a range of 500-5000 SLPM.

[0041] Further, a check valve 23 is provided upstream of the gas mass flow meter 22 to prevent reverse flow of gas during the test, such as backflow that may occur when the valve is suddenly closed.

[0042] Further, a pulsation damper is provided between the check valve 23 and the gas mass flow meter 22. The pulsation damper is a buffer cavity filled with porous material. The pulsation damper can absorb pressure fluctuations in the gas flow, such as pulsations caused by the start-stop of the compressor or the action of the valve, smooth the gas flow, and improve the measurement stability.

[0043] Optionally, the actuator is an electric actuator or a pneumatic actuator. The electric actuator is suitable for high-precision and programmable control tests, such as linear characteristic tests of control valves. The pneumatic actuator is suitable for fast response and large torque tests, such as instantaneous opening and closing tests of safety valves.

[0044] In the embodiment, the gas mass flow meter 22 is provided with a straight pipe section with a length of not less than 5 times of the pipe diameter upstream and downstream of the gas mass flow meter 22, so as to avoid pressure drop fluctuation caused by components upstream and downstream of the gas mass flow meter 22, and avoid reading drift of the gas mass flow meter 22 caused by pressure fluctuation.

[0045] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit the present application; the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of the present application as described above, which are not provided in details for simplicity; although the present application is described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and the 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 present application.

Claims

1. A pneumatic valve flow testing system, characterized in that, include: The multi-source gas supply unit includes a gas supply component (11), a main pipeline (12) and a diversion component (13) connected in series. The diversion component (13) distributes the gas from the main pipeline (12) to at least two parallel test branches. Each test branch is equipped with an independent branch pressure reducing valve (21). The multi-range flow test unit includes gas mass flow meters (22) installed in each test branch, and each gas mass flow meter (22) has a different range. The multi-size interface piping unit includes quick connectors (31) installed at the end of each test branch for connecting the valve to be tested, and each quick connector (31) has a different size; The actuator, connected to the valve under test, is used to receive control signals and adjust the valve opening. The data acquisition and processing unit is electrically connected to the gas mass flow meter (22) and the actuator.

2. The pneumatic valve flow testing system according to claim 1, characterized in that, The gas supply assembly (11) includes an air compressor (111) and / or an air storage tank (112).

3. The pneumatic valve flow testing system according to claim 2, characterized in that, The air compressor (111) is connected to the main pipeline (12) via a filter pressure reducing valve (113).

4. The pneumatic valve flow testing system according to claim 1, characterized in that, The shunt assembly (13) distributes the gas from the main pipeline (12) to four parallel test branches, with 1 / 4-inch, 3 / 8-inch, 1 / 2-inch, and 3 / 4-inch quick connectors (31) installed downstream of the four test branches respectively. The multi-range flow test unit (20) includes two thermal mass flow meters with different ranges. One test branch is connected to one of the thermal mass flow meters, and the other three test branches are connected in parallel to the other thermal mass flow meter.

5. The pneumatic valve flow testing system according to claim 1, characterized in that, A check valve (23) is provided upstream of the gas mass flow meter (22).

6. The pneumatic valve flow testing system according to claim 5, characterized in that, A pulsation damper is provided between the one-way valve (23) and the gas mass flow meter (22), and the pulsation damper is a buffer cavity filled with porous material.

7. The pneumatic valve flow testing system according to claim 1, characterized in that, The actuator is an electric actuator or a pneumatic actuator.

8. The pneumatic valve flow testing system according to claim 2, characterized in that, The gas storage tank (112) is equipped with a safety pressure relief valve and a pressure sensor on its top, and the pressure sensor is electrically connected to the data acquisition and processing unit.

9. The pneumatic valve flow testing system according to claim 3, characterized in that, The filter pressure reducing valve (113) is equipped with a manual adjustment handle, and its outlet pressure is displayed in real time via a digital pressure gauge.

10. The pneumatic valve flow testing system according to claim 1, characterized in that, The gas mass flow meter (22) has straight pipe sections with a length of not less than 5 times the pipe diameter at both its upstream and downstream sides.

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