Testing system for valve flow amplifier for nuclear power station

Abstract

The utility model relates to a test system for a valve flow amplifier for a nuclear power station, and the system comprises a gas supply assembly (1) which is used for supplying gas to a to-be-tested flow amplifier (2); the pressure adjusting assembly (3) is connected with the gas supply assembly (1) and used for converting gas pressure into gas pressure in actual use; an air outlet of the pressure adjusting assembly (3) is communicated with an inlet of the flow amplifier (2); and the pressure testing assembly (4) is connected with the outlet of the flow amplifier (2) and is used for measuring the pressure of the gas flowing out of the flow amplifier (2). Compared with the prior art, the test system provided by the utility model can detect the sealing performance of a single flow amplifier, and improves the equipment maintenance efficiency and the system operation stability.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power plant testing, in particular to a testing system for a valve flow amplifier used in a nuclear power plant. Background Art

[0002] Valves are indispensable equipment in process systems. In nuclear power plants, strict requirements are placed on the response time of valves that perform safety functions in order to ensure nuclear safety. In order to ensure the response speed of valves in the system, most valves are equipped with flow amplifiers. Therefore, it is very important to ensure that the valve flow amplifier functions properly.

[0003] Currently, most of the important valve positioners in the nuclear island of nuclear power plants are equipped with flow amplifiers. These flow amplifiers are currently installed in high-temperature locations, and their valve cores are made of rubber. Consequently, the flow amplifiers have a high failure rate due to aging caused by high temperatures. Prior art flow amplifiers lack the necessary equipment for functional testing within maintenance workshops. They must be connected to an on-site system and operated with compressed air to complete individual functional testing. Manufacturers do not have equipment for offline debugging of flow amplifiers. To test a flow amplifier for a fault, the amplifier must be installed and then removed for repair. This not only impacts equipment maintenance efficiency but also requires testing within the unit, adversely affecting the system's stable operation.

[0004] Therefore, in order to solve the above problems, it is urgent to develop a testing device for valve flow amplifiers used in nuclear power plants. Utility Model Content

[0005] The purpose of the utility model is to provide a test system for a valve flow amplifier used in a nuclear power plant, so as to perform performance testing on the valve flow amplifier before assembly.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] The utility model provides a test system for a valve flow amplifier used in a nuclear power plant, comprising:

[0008] An air supply assembly, used for supplying air to the flow amplifier to be tested;

[0009] A pressure regulating assembly connected to the gas supply assembly for converting the gas pressure into the gas pressure during actual use; the gas outlet of the pressure regulating assembly is connected to the inlet of the flow amplifier;

[0010] The pressure test assembly is connected to the outlet of the flow amplifier and is used to measure the pressure of the gas flowing out of the flow amplifier.

[0011] Furthermore, the air supply assembly is connected to a power source.

[0012] Furthermore, the power supply is a 24V DC power supply.

[0013] Furthermore, the air inlet of the pressure regulating assembly is connected to the air outlet of the air supply assembly through a connecting pipe.

[0014] Furthermore, the air outlet of the pressure regulating assembly is connected to the inlet of the flow amplifier through a connecting pipe.

[0015] Furthermore, the connecting pipe can be selected from 1 / 4 inch instrument pipeline or 1 / 16 inch plastic hose according to test requirements.

[0016] Furthermore, the pressure regulating assembly is a pressure reducing valve, which can convert the pressure of the compressed air into the same pressure as that used on site to ensure the stability and reliability of the test results.

[0017] Furthermore, a control valve is provided between the pressure regulating assembly and the flow amplifier. When the pressure value on the control valve matches the set pressure value of the pressure regulating assembly, the control valve is opened to allow gas to flow into the flow amplifier.

[0018] Furthermore, the pressure testing component is a digital pressure gauge.

[0019] Furthermore, the test system also includes an integrated box.

[0020] Furthermore, the air supply assembly, the pressure regulating assembly, the pressure testing assembly and the flow amplifier to be tested are all installed in an integrated box.

[0021] The method for testing the sealing performance of a flow amplifier using the above-mentioned testing system in the utility model specifically comprises the following steps:

[0022] S1: Connect the air supply assembly, pressure regulating assembly, flow amplifier and pressure testing assembly in sequence; install a control valve between the pressure regulating assembly and the flow amplifier; when the pressure value on the control valve matches the set pressure value of the pressure regulating assembly, open the control valve;

[0023] S2: Open the gas supply assembly, and the gas enters the pressure regulating assembly and then further enters the flow amplifier;

[0024] S3: The gas passing through the flow amplifier is input into the pressure test assembly, and the sealing performance of the flow amplifier is judged by the pressure test assembly; when the pressure test assembly shows that the pressure value does not increase, it is judged that the sealing performance of the flow amplifier is good; when the pressure test assembly shows that the pressure value increases, it is judged that the sealing performance of the flow amplifier is poor.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] (1) The test system of the present invention does not need to perform functional testing after the flow amplifier is connected to the site. Instead, the sealing of the single flow amplifier is tested by connecting and cooperating the air supply component, the pressure regulating component and the pressure testing component.

[0027] (2) The utility model can convert the pressure of compressed air into the same pressure as that used on site through the pressure regulating component to ensure the stability and reliability of the test results.

[0028] (3) The test system of the present invention is easy to install and operate. Through simple on-site installation, the performance of the valve flow amplifiers in the warehouse can be tested, thereby improving the equipment maintenance efficiency and the stability of the system operation.

[0029] (4) The test system of the present invention can be integrated into an integrated box. The test system has a compact structure, a reliable connection, and can be easily carried, assembled, and disassembled. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic structural diagram of the test system of the present utility model.

[0031] Figure 2 This is a schematic structural diagram of the integrated box of Example 3 of the present utility model.

[0032] Description of the marks in the figure:

[0033] 1- Air supply assembly;

[0034] 2-Flow amplifier;

[0035] 3-pressure regulating assembly;

[0036] 4-Pressure test assembly;

[0037] 5- Power supply;

[0038] 6-connecting pipe;

[0039] 7-Control valve;

[0040] 8-Integrated box. DETAILED DESCRIPTION

[0041] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments. This embodiment is implemented based on the technical solution of the present invention, and provides a detailed implementation method and specific operation process, but the protection scope of the present invention is not limited to the following embodiments.

[0042] In the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or components referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes and should not be understood as indicating or implying relative importance; in addition, unless otherwise expressly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediate medium, or it can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not require further definition or explanation in subsequent drawings.

[0044] Example 1:

[0045] A test system for valve flow amplifiers used in nuclear power plants, such as Figure 1 As shown, the device comprises a gas supply assembly 1, a pressure regulating assembly 3, and a pressure testing assembly 4. The gas supply assembly 1 is used to supply gas to the flow amplifier 2 under test. The pressure regulating assembly 3 is connected to the gas supply assembly 1 and is used to convert the gas pressure into the actual gas pressure during use. The gas outlet of the pressure regulating assembly 3 is connected to the inlet of the flow amplifier 2. The pressure testing assembly 4 is connected to the outlet of the flow amplifier 2 and is used to measure the pressure of the gas flowing out of the flow amplifier 2.

[0046] The sealing performance testing method of this embodiment using the above-mentioned testing system includes the following steps:

[0047] S1: Connect the air supply component 1, pressure regulating component 3, flow amplifier 2 and pressure testing component 4 in sequence;

[0048] S2: Open the gas supply component 1, and the gas is input into the pressure regulating component 3 and further into the flow amplifier 2;

[0049] S3: The gas passing through the flow amplifier 2 is input into the pressure testing assembly 4, and the sealing performance of the flow amplifier 2 is judged by the pressure testing assembly 4.

[0050] Example 2:

[0051] A test system for a valve flow amplifier used in a nuclear power plant comprises a gas supply component 1, a pressure regulating component 3 and a pressure testing component 4.

[0052] The air supply assembly 1 of this embodiment is connected to a power supply 5 for providing power to the air supply assembly 1. The power supply 5 adopts a 24VDC power supply. The air supply assembly 1 of this embodiment is a common air pump that can provide compressed air for testing the flow amplifier 2.

[0053] The pressure regulating assembly 3 of this embodiment is connected to the gas supply assembly 1 and is used to convert the gas pressure into the gas pressure in actual use to ensure stable and reliable test results. The pressure regulating assembly 3 of this embodiment is a pressure reducing valve.

[0054] In this embodiment, the air inlet of the pressure regulating assembly 3 is connected to the air outlet of the air supply assembly 1 via a connecting pipe 6, and the air outlet of the pressure regulating assembly 3 is also connected to the inlet of the flow amplifier 2 via a connecting pipe 6. A control valve 7 is provided between the pressure regulating assembly 3 and the flow amplifier 2. When the pressure value on the control valve 8 matches the set pressure value of the pressure regulating assembly 3, the control valve 7 opens, allowing the decompressed gas to flow steadily into the flow amplifier 2.

[0055] The pressure test assembly 4 of this embodiment is connected to the outlet of the flow amplifier 2 and is used to measure the pressure of the gas flowing out of the flow amplifier 2. The pressure test assembly 4 of this embodiment is a digital pressure gauge that can quickly feedback the pressure value to help the operator judge the sealing performance of the flow amplifier 2.

[0056] The test method for the valve flow amplifier used in a nuclear power plant in this embodiment is as follows:

[0057] S1: Connect the air supply assembly 1, pressure regulator assembly 3, flow amplifier 2, and pressure test assembly 4 in sequence, ensuring a secure connection. Connect the air inlet of the pressure regulator assembly 3 to the air outlet of the air supply assembly 1 via connecting pipe 6. Connect the air outlet of the pressure regulator assembly 3 to the inlet of the flow amplifier 2 via connecting pipe 6. Connecting pipe 6 can be made of either 1 / 4-inch instrument line or 1 / 16-inch plastic hose, depending on test requirements. Install a control valve 7 between the pressure regulator assembly 3 and the flow amplifier 2.

[0058] S2: Open the gas supply component 1, input the gas into the pressure regulating component 3 (pressure reducing valve) and adjust it to the pressure consistent with that used on site (generally 0.5-0.7MPa) to ensure the stability and reliability of the test results. When the pressure value on the control valve 7 matches the set pressure value of the pressure regulating component 3, open the control valve 7 to allow the gas to flow into the flow amplifier 2.

[0059] S3: The decompressed gas is further fed into flow amplifier 2. The gas passing through flow amplifier 2 is then fed into pressure test assembly 4 (digital pressure gauge). Pressure test assembly 4 assesses the sealing performance of flow amplifier 2. If the pressure displayed by pressure test assembly 4 does not increase, the sealing performance of flow amplifier 2 is considered good. If the pressure displayed by pressure test assembly 4 increases, the sealing performance of flow amplifier 2 is considered poor.

[0060] Example 3:

[0061] A test system for a valve flow amplifier for a nuclear power plant includes a gas supply component 1, a pressure regulating component 3, a pressure testing component 4, and an integrated box 8. Figure 2 As shown, the air supply assembly 1, the pressure regulating assembly 3, the pressure testing assembly 4 and the flow amplifier 2 to be tested are all installed in the integrated box 8, which is used to integrate the test system of this embodiment into a frame structure, which can effectively improve the efficiency and quality of the test, simplify the test process, reduce costs, and provide support for continuous improvement of the system.

[0062] The above description of the embodiments is intended to facilitate understanding and use of the utility model by those skilled in the art. Those skilled in the art will readily be able to make various modifications to these embodiments and apply the general principles described herein to other embodiments without requiring inventive effort. Therefore, the utility model is not limited to the above-described embodiments. Improvements and modifications made by those skilled in the art based on the disclosure of this utility model without departing from the scope of this utility model should be within the scope of protection of this utility model.

Claims

1. A test system for a valve flow amplifier for a nuclear power plant, characterized in that: include: An air supply assembly (1) for supplying air to a flow amplifier (2) to be tested; A pressure regulating assembly (3) is connected to the gas supply assembly (1) and is used to convert the gas pressure into the gas pressure during actual use; the gas inlet of the pressure regulating assembly (3) is connected to the gas outlet of the gas supply assembly (1) through a connecting pipe (6), and the gas outlet of the pressure regulating assembly (3) is connected to the inlet of the flow amplifier (2) through the connecting pipe (6); A pressure test assembly (4) is connected to the outlet of the flow amplifier (2) and is used to measure the pressure of the gas flowing out of the flow amplifier (2); the pressure test assembly (4) is a digital pressure gauge; An integrated box (8), wherein the air supply assembly (1), the pressure regulating assembly (3), the pressure testing assembly (4) and the flow amplifier (2) to be tested are all installed in the integrated box (8).

2. A test system for a valve flow amplifier for a nuclear power plant according to claim 1, characterized in that: The air supply assembly (1) is connected to a power source (5).

3. A test system for a valve flow amplifier for a nuclear power plant according to claim 2, characterized in that: The power supply (5) is a 24V DC power supply.

4. A test system for a valve flow amplifier for a nuclear power plant according to claim 1, characterized in that: A control valve (7) is provided between the pressure regulating assembly (3) and the flow amplifier (2).

5. A test system for a valve flow amplifier for a nuclear power plant according to claim 1, characterized in that: The pressure regulating component (3) is a pressure reducing valve.

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