Test system and test method for valve flow amplifier for nuclear power station

Abstract

The invention relates to a test system and test method for a valve flow amplifier for a nuclear power plant, 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 testing system provided by the invention can be used for detecting the sealing performance of a single flow amplifier, so that the equipment maintenance efficiency and the system operation stability are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of nuclear power plant testing, in particular to a testing system and testing method for a valve flow amplifier for a nuclear power plant. BACKGROUND

[0002] Valves are indispensable equipment in process systems, and in nuclear power plants, the response time of valves that bear safety functions is strictly required for nuclear safety, and in order to ensure the response speed of the valves in the system, flow amplifiers are mostly equipped, so it is very important to ensure that the valve flow amplifier functions properly.

[0003] At present, most of the important valve positioners in the nuclear island of the nuclear power plant are equipped with flow amplifiers, and the current flow amplifiers are installed in a place with high temperature, and the valve core material of the flow amplifier is rubber, so the failure rate of the flow amplifier due to high temperature is relatively high. In the prior art, the flow amplifier has no corresponding equipment for function test in the maintenance workshop, and needs to be connected to the field system and put into operation to complete the single function test. The manufacturer does not have a matching flow amplifier offline debugging device, and if it is necessary to test whether the flow amplifier has a fault, the device needs to be installed and then disassembled for processing. The above operation not only affects the efficiency of equipment maintenance, but also needs to be tested in the unit, which also brings adverse effects on the stable operation of the system.

[0004] Therefore, in view of the above problems, it is urgent to develop a testing device for a valve flow amplifier for a nuclear power plant. SUMMARY

[0005] The purpose of the present application is to provide a testing system and testing method for a valve flow amplifier for a nuclear power plant, so as to detect the performance of the valve flow amplifier before assembly.

[0006] The purpose of the present application can be achieved by the following technical solutions:

[0007] The present application provides a testing system for a valve flow amplifier for a nuclear power plant, comprising:

[0008] A gas supply assembly for supplying gas to the flow amplifier to be tested;

[0009] A pressure regulating assembly connected with the gas supply assembly, for converting the gas pressure into the actual gas pressure in use; the gas outlet of the pressure regulating assembly is in communication with the inlet of the flow amplifier;

[0010] A pressure testing assembly connected with the outlet of the flow amplifier, for measuring the gas pressure flowing out of the flow amplifier.

[0011] Further, the gas supply assembly is connected with a power supply.

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

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

[0014] Further, the air outlet of the pressure regulating assembly is communicated with the inlet of the flow amplifier through a connecting pipe.

[0015] Further, the connecting pipe can be selected as a 1 / 4 inch instrument pipe or a 1 / 16 inch plastic hose according to the test requirement.

[0016] Further, the pressure regulating assembly is a pressure reducing valve, which can convert the pressure of compressed air into a pressure consistent with the pressure used in the field, so as to ensure the stability and reliability of the test effect.

[0017] Further, a control valve is arranged 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 the gas to flow into the flow amplifier.

[0018] Further, the pressure test assembly is a digital pressure gauge.

[0019] Further, the test system further comprises an integrated box, and the air supply assembly, the pressure regulating assembly, the pressure test assembly and the flow amplifier to be tested are all installed in the integrated box.

[0020] The application provides a test method for a valve flow amplifier for a nuclear power plant, which adopts the above test system, and the test method specifically comprises the following steps:

[0021] S1: sequentially connecting the air supply assembly, the pressure regulating assembly, the flow amplifier and the pressure test assembly;

[0022] S2: opening the air supply assembly, and inputting the gas into the pressure regulating assembly and then into the flow amplifier;

[0023] S3: inputting the gas through the flow amplifier into the pressure test assembly, and judging the sealing performance of the flow amplifier by the pressure test assembly.

[0024] Further, in step S1, a control valve is arranged between the pressure regulating assembly and the flow amplifier; and when the pressure value on the control valve matches the set pressure value of the pressure regulating assembly, the control valve is opened.

[0025] Further, in step S3, when the pressure test assembly displays that the pressure value does not increase, it is determined that the sealing performance of the flow amplifier is good; and when the pressure test assembly displays that the pressure value increases, it is determined that the sealing performance of the flow amplifier is poor.

[0026] Compared with the prior art, the present application has the following beneficial effects:

[0027] (1) The test system of the present application does not need to perform function test after the flow amplifier is connected to the field, but performs sealing detection on the single flow amplifier through the connection and cooperation of the air supply assembly, the pressure regulating assembly and the pressure test assembly.

[0028] (2) The present application can convert the pressure of compressed air into the pressure consistent with the pressure used in the field through the pressure regulating assembly, so as to ensure the stability and reliability of the test effect.

[0029] (3) The test system of the present application is simple to install and operate, and can perform performance test on the valve flow amplifier of the warehouse spare parts through simple installation in the field, thereby improving the equipment maintenance efficiency and the stability of system operation.

[0030] (4) The test system of the present application can be integrated in an integrated box, and the test system has compact structure and reliable connection, and can be conveniently carried and assembled and disassembled. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is a structural schematic view of the test system of the present application.

[0032] Figure 2 is a structural schematic view of the integrated box of embodiment 3 of the present application.

[0033] MARK DESCRIPTION IN THE DRAWINGS:

[0034] 1 - air supply assembly;

[0035] 2 - flow amplifier;

[0036] 3 - pressure regulating assembly;

[0037] 4 - pressure test assembly;

[0038] 5 - power supply;

[0039] 6 - connecting pipe;

[0040] 7 - control valve;

[0041] 8 - integrated box. DETAILED DESCRIPTION

[0042] The present application will be described in detail below in combination with the drawings and specific embodiments. The present embodiment is implemented on the premise of the technical scheme of the present application, and gives detailed implementation mode and specific operation process, but the protection scope of the present application is not limited to the following embodiments.

[0043] In the present application, it should be noted that similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0044] It should be noted that similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0045] Embodiment 1

[0046] A test system for a valve flow amplifier for nuclear power plants, as shown in Figure 1 The test system includes a gas supply assembly 1, a pressure regulating assembly 3 and a pressure test assembly 4. The gas supply assembly 1 is used to supply gas to the flow amplifier 2 to be tested. 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 in use. The outlet of the pressure regulating assembly 3 is in communication with the inlet of the flow amplifier 2. The pressure test assembly 4 is connected to the outlet of the flow amplifier 2, and is used to measure the gas pressure flowing out of the flow amplifier 2.

[0047] The present embodiment also provides a test method for a valve flow amplifier for nuclear power plants, which uses the test system described above, and specifically includes the following steps:

[0048] S1: sequentially connecting the gas supply assembly 1, the pressure regulating assembly 3, the flow amplifier 2 and the pressure test assembly 4;

[0049] S2: opening the gas supply assembly 1, and inputting the gas into the pressure regulating assembly 3 and then into the flow amplifier 2;

[0050] S3: inputting the gas through the flow amplifier 2 into the pressure test assembly 4, and judging the sealing performance of the flow amplifier 2 through the pressure test assembly 4.

[0051] Embodiment 2

[0052] A test system for valve flow amplifier for nuclear power station, comprising a gas supply assembly 1, a pressure regulating assembly 3 and a pressure test assembly 4.

[0053] The gas supply assembly 1 of the embodiment is connected with a power supply 5 for providing power for the gas supply assembly 1, and the power supply 5 adopts a 24VDC power supply. The gas supply assembly 1 of the embodiment is a common air pump, which can provide compressed air for the test of the flow amplifier 2.

[0054] The pressure regulating assembly 3 of the embodiment is connected with the gas supply assembly 1, for converting the gas pressure into the actual gas pressure in use, so as to ensure the stable and reliable test effect. The pressure regulating assembly 3 of the embodiment is a pressure reducing valve.

[0055] The gas inlet of the pressure regulating assembly 3 of the embodiment is connected with 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 communicated with the inlet of the flow amplifier 2 through the connecting pipe 6. The control valve 7 is arranged between the pressure regulating assembly 3 and the flow amplifier 2, and when the pressure value on the valve 8 matches the set pressure value of the pressure regulating assembly 3, the control valve 7 is opened, so that the reduced gas is stably introduced into the flow amplifier 2.

[0056] The pressure test assembly 4 of the embodiment is connected with the outlet of the flow amplifier 2, for measuring the pressure of the gas flowing out of the flow amplifier 2. The pressure test assembly 4 of the embodiment is a digital pressure gauge, which can quickly feedback the pressure value, so as to help the operator to judge the sealing performance of the flow amplifier 2.

[0057] Embodiment 3:

[0058] A test system for valve flow amplifier for nuclear power station, comprising a gas supply assembly 1, a pressure regulating assembly 3, a pressure test assembly 4, and further comprising an integrated box 8. As shown in the figure, the gas supply assembly 1, the pressure regulating assembly 3, the pressure test assembly 4 and the flow amplifier 2 to be tested are all installed in the integrated box 8, so as to integrate the test system of the embodiment in a frame structure, which can effectively improve the efficiency and quality of the test, and can also simplify the test process, reduce the cost, and provide support for the continuous improvement of the system. Figure 2

[0059] Embodiment 4:

[0060] A test method for valve flow amplifier for nuclear power station, and the specific method is as follows:

[0061] ​S1: sequentially connect the gas supply assembly 1, the pressure regulating assembly 3, the flow amplifier 2 and the pressure testing assembly 4, and make sure that the connection between the devices is firm. The gas inlet of the pressure regulating assembly 3 is connected with the gas outlet of the gas supply assembly 1 through the connecting pipe 6, and the gas outlet of the pressure regulating assembly 3 is communicated with the inlet of the flow amplifier 2 through the connecting pipe 6. The connecting pipe 6 can be 1 / 4in instrument pipeline or 1 / 16in plastic hose according to the testing requirement. The control valve 7 is installed between the pressure regulating assembly 3 and the flow amplifier 2.

[0062] S2: open the gas supply assembly 1, input the gas into the pressure regulating assembly 3 (pressure reducing valve), and adjust the pressure to be consistent with the pressure used in the field (generally 0.5-0.7MPa) to ensure the stability and reliability of the testing effect, and when the pressure value on the control valve 7 matches the set pressure value of the pressure regulating assembly 3, open the control valve 7 to let the gas flow into the flow amplifier 2.

[0063] S3: the gas after pressure reduction is further input into the flow amplifier 2, and the gas input into the pressure testing assembly 4 (digital pressure gauge) through the flow amplifier 2. The sealing performance of the flow amplifier 2 is judged through the pressure testing assembly 4. When the pressure value displayed by the pressure testing assembly 4 does not increase, it is determined that the sealing performance of the flow amplifier 2 is good. When the pressure value displayed by the pressure testing assembly 4 increases, it is determined that the sealing performance of the flow amplifier 2 is poor.

[0064] The above description of the embodiments is for the purpose of enabling and using the invention for those of ordinary skill in the art. Those skilled in the art can easily make various modifications to the embodiments, and apply the general principles described herein to other embodiments without creative labor. Therefore, the present application is not limited to the above embodiments, and the improvements and modifications made by those skilled in the art without departing from the scope of the present application should be within the protection scope of the present application.

Claims

1. A test system for valve flow amplifiers used in nuclear power plants, characterized in that, include: An air supply assembly (1) is used to supply air to the flow amplifier (2) to be tested; A pressure regulating component (3) is connected to the gas supply component (1) and is used to convert the gas pressure into the gas pressure used in actual operation; the outlet of the pressure regulating component (3) is connected to the inlet of the flow amplifier (2); The pressure testing assembly (4), which is connected to the outlet of the flow amplifier (2), is used to measure the pressure of the gas flowing out through the flow amplifier (2).

2. The test system for valve flow amplifiers used in nuclear power plants according to claim 1, characterized in that, The gas supply assembly (1) is connected to a power source (5).

3. The test system for valve flow amplifiers used in nuclear power plants according to claim 2, characterized in that, The power supply (5) is a 24V DC power supply.

4. The test system for valve flow amplifiers used in nuclear power plants according to claim 1, characterized in that, The air inlet of the pressure regulating component (3) is connected to the air outlet of the air supply component (1) through a connecting pipe (6); the air outlet of the pressure regulating component (3) is connected to the inlet of the flow amplifier (2) through a connecting pipe (6).

5. A test system for valve flow amplifiers used in nuclear power plants according to claim 4, characterized in that, A control valve (7) is provided between the pressure regulating component (3) and the flow amplifier (2).

6. A test system for valve flow amplifiers used in nuclear power plants according to claim 1, characterized in that, The pressure regulating component (3) is a pressure reducing valve; The pressure testing component (4) is a digital pressure gauge.

7. A test system for valve flow amplifiers used in nuclear power plants according to claim 1, characterized in that, The test system also includes an integrated box (8), in which the gas supply component (1), pressure regulating component (3), pressure testing component (4) and the flow amplifier (2) to be tested are all installed.

8. A test method for valve flow amplifiers used in nuclear power plants, characterized in that, The testing method using the testing system according to any one of claims 1-7 specifically includes the following steps: S1: Connect the gas supply assembly (1), pressure regulating assembly (3), flow amplifier (2) and pressure testing assembly (4) in sequence; S2: Open the gas supply component (1), and after the gas input pressure regulating component (3) is connected, it is further input into the flow amplifier (2); S3: The sealing performance of the flow amplifier (2) is judged by the pressure test component (4) through the gas input pressure test component (4) after passing through the flow amplifier (2).

9. A test method for a valve flow amplifier for a nuclear power plant according to claim 8, characterized in that, In step S1, a control valve (7) is installed between the pressure regulating component (3) and the flow amplifier (2); when the pressure value on the control valve (7) matches the set pressure value of the pressure regulating component (3), the control valve (7) is opened.

10. A test method for a valve flow amplifier for a nuclear power plant according to claim 8, characterized in that, In step S3, when the pressure test component (4) shows that the pressure value does not increase, it is determined that the flow amplifier (2) has good sealing performance; When the pressure test component (4) shows an increase in pressure value, it is determined that the flow amplifier (2) has poor sealing performance.

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