Checking air supply tool for electrical penetration assembly

Abstract

The utility model relates to the technical field of electrical penetration assembly maintenance, aims to solve the problem that an electrical penetration assembly cannot be verified online, and discloses a verification air supply tool for an electrical penetration assembly, which comprises an integrated three-way valve, a pressure gauge is mounted at a first port of the integrated three-way valve, and a three-way valve is connected to a second port of the integrated three-way valve. A third port of the three-way valve is connected with a first tool guide pipe, the first tool guide pipe is connected with a pressure monitoring assembly, a first port of the three-way valve is provided with a proportional unloading valve, a second port of the three-way valve is connected with a second tool guide pipe, and the second tool guide pipe is connected with a gas cylinder. According to the utility model, verification of left and right reading of the penetration piece pressure gauge and nitrogen supplementation of the electrical penetration piece can be realized.

Description

Technical Field

[0001] This utility model relates to the field of electrical penetration component repair technology, and in particular to a calibration and air replenishment tool for electrical penetration components. Background Technology

[0002] Electrical penetrations are specialized electrical devices installed on the nuclear reactor containment building, reactor shielding room, and reactor compartment. They are used for various cables to pass through the containment. Under normal and various accident conditions, they maintain the integrity and electrical continuity of the pressure boundaries such as the reactor containment building, prevent the leakage of radioactive materials, and are crucial for the safe operation of the reactor.

[0003] The penetration is a pressure-bearing, sealed structure, internally purged with nitrogen. A pointer-type pressure gauge is installed in the penetration to monitor the internal pressure. PM requires regular calibration of the pressure gauge. Because the pressure gauge is directly connected to the inside of the penetration via a gas pipeline without a valve, offline calibration would require partially venting the gas inside the penetration. However, due to limitations in unit maintenance time and reactor operating conditions, offline calibration is difficult to implement. Simultaneously, maintenance personnel regularly inspect the pressure gauge readings on-site. For medium- and low-pressure electrical penetrations at room temperature (20°C), if the pressure gauge reading is below 0.23 MPa and 0.20 MPa respectively, gas replenishment is required. According to materials provided by the penetration manufacturer, the maximum internal gas pressure during operation should be less than 0.44 MPa. However, because the electrical penetration itself lacks a safety valve, the traditional gas replenishment method is highly susceptible to overpressure if a malfunction occurs during replenishment.

[0004] Currently, the calibration of pressure gauges for electrical penetration components generally adopts an offline verification method, which involves disassembling each pressure gauge individually from the pressure monitoring assembly and sending it to a professional calibration institution for verification. This method has three disadvantages: first, it has strict requirements on the delivery time, and the unit shutdown time and the validity period of the verification must be considered on site; second, it requires repeated disassembly and assembly of pressure gauges, resulting in a large workload on site; and third, due to the large number of batches of deliveries, the verification time is relatively long. Utility Model Content

[0005] The purpose of this invention is to provide a calibration and air replenishment fixture for electrical penetrations, which solves the problem of electrical penetrations being unable to be calibrated online and ensures that electrical penetrations can be replenished online safely.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A calibration and gas replenishment fixture for electrical penetrations includes an integrated three-way valve. A pressure gauge is installed on the first port of the integrated three-way valve, a three-way valve is connected to the second port, and a first fixture guide tube is connected to the third port. The first fixture guide tube is connected to a pressure monitoring component. A proportional unloading valve is installed on the first port of the three-way valve, and a second fixture guide tube is connected to the second port. The second fixture guide tube is connected to a gas cylinder.

[0008] In some embodiments, the first tooling guide tube is connected to the component valve of the pressure monitoring component.

[0009] In some embodiments, one end of the component valve is equipped with a component guide pipe, which is connected to the first tooling guide pipe.

[0010] In some embodiments, the component guide tube has a pagoda connector.

[0011] In some embodiments, the third port of the integrated three-way valve has a pagoda connector that connects to the first tooling guide tube.

[0012] In some embodiments, the integrated three-way valve and the pressure gauge are connected by threads.

[0013] In some embodiments, the pressure monitoring assembly includes a through-hole pressure gauge mounted on a three-way valve within the pressure monitoring assembly.

[0014] In some embodiments, the first tooling guide tube and the integrated three-way valve are welded together.

[0015] In some embodiments, the three-way valve and the second tooling guide tube are welded together.

[0016] Compared with the prior art, the calibration and air replenishment fixture for electrical penetrations provided by this utility model has the following advantages:

[0017] This invention enables the verification of the left and right readings of a pressure gauge.

[0018] This utility model is equipped with a proportional unloading valve, which can protect electrical penetrations and reduce operational risks. This calibration and replenishment fixture uses the principle of communicating vessels to calibrate the left and right readings of the pressure gauge on the penetration and to replenish nitrogen to the electrical penetration.

[0019] Furthermore, the pressure gauge and proportional unloading valve of this utility model are connected by a threaded connection, which facilitates inspection.

[0020] Furthermore, this utility model adopts an efficient online pressure gauge calibration method to replace the traditional offline pressure gauge calibration method, realizing the inspection of through-body pressure gauges without disassembly and assembly, and improving the calibration efficiency of through-body pressure gauges. Attached Figure Description

[0021] To more clearly illustrate the technical solution of this utility model, the accompanying drawings used in the technical description will be briefly introduced below.

[0022] Figure 1 A schematic diagram of the structure of the calibration and air replenishment fixture for electrical penetration parts provided by this utility model;

[0023] Figure 2 This is a schematic diagram showing the connection between the calibration and air replenishment fixture for electrical penetration parts and the pressure detection component provided by this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1-High-pressure flexible air hose; 2-First tooling guide pipe; 3-Integrated three-way valve; 4-Three-way valve; 5-Second tooling guide pipe; 6-Proportional unloading valve; 7-Pressure gauge; 8-Component guide pipe; 9-Component valve; 10-Through-part pressure gauge. Detailed Implementation

[0026] The following detailed description provides further details on specific implementation methods.

[0027] like Figure 1 As shown, this utility model provides a calibration and air replenishment fixture for electrical penetration components, which combines air replenishment and calibration functions into one fixture. The fixture includes an integrated three-way valve 3, a three-way valve 4, a proportional unloading valve 6, a pressure gauge 7, and a fixture lead pipe. The fixture lead pipe includes a first fixture guide pipe 2 and a second fixture guide pipe 5.

[0028] A pressure gauge 7 is installed above the integrated three-way valve 3. One end (right end) of the integrated three-way valve 3 is connected to the three-way valve 4, and the other end (left end) is connected to the first tooling guide pipe 2. The first tooling guide pipe 2 is connected to the high-pressure flexible gas pipe 1, and the high-pressure flexible gas pipe 1 is connected to the pressure monitoring component. A proportional unloading valve 6 is connected above the three-way valve 4. One end (right end) of the three-way valve 4 is connected to the second tooling guide pipe 5, and the second tooling guide pipe 5 is connected to the gas cylinder.

[0029] like Figure 2 As shown, the calibration and gas replenishment fixture is connected to the component valve of the pressure gauge 7 through the first fixture guide pipe 2, and to the gas cylinder through the second fixture guide pipe 5.

[0030] The left end of the integrated three-way valve 3 is a pagoda connector, and the right end of the component valve 9 is equipped with the component guide pipe 8. The right end of the component guide pipe 8 is a pagoda connector. The two pagoda connectors are connected by a high-pressure soft air pipe 1 to achieve a quick connection of the air circuit, so that the calibration and air replenishment tool can be connected to the air circuit of the through-part pressure gauge 10.

[0031] The component guide tube 8 is connected to the three-way valve of the pressure detection component via a pipeline (e.g., a high-pressure flexible air tube), and a through-hole pressure gauge 10 is installed on the three-way valve of the pressure detection component.

[0032] In one embodiment, the pressure gauge 7 and the integrated three-way valve 3 are connected by a detachable threaded connection, facilitating the disassembly and installation of the pressure gauge 7 for inspection. The remaining structure of this calibration and replenishment fixture is connected, for example, using a high-pressure flexible air hose combined with a compression fitting, facilitating rapid assembly of the online calibration and replenishment fixture. When replenishment is required, the high-pressure flexible air hose on the high-pressure gas cylinder is quickly connected to the pagoda connector at the end of the second fixture guide tube 5 on the calibration and replenishment fixture for replenishment.

[0033] In one embodiment, the proportional unloading valve 6 is installed at one of the ports of the three-way valve 4, the second tooling guide pipe 5 is installed at one of the ports of the three-way valve 4, and the third port of the three-way valve 4 is connected to the integrated three-way valve 3 via a pipeline (e.g., a high-pressure flexible air pipe).

[0034] The specifications for electrical penetrations require that the pressure not exceed 0.44 MPa. If the pressure unexpectedly rises above 0.44 MPa during air replenishment, the proportional unloading valve 6 on the tooling will open to release the pressure and protect the electrical penetrations.

[0035] Preferably, pressure gauge 7 is a high-precision standard pressure gauge. This invention uses an efficient online pressure gauge calibration method to replace the traditional offline pressure gauge calibration method, realizing the inspection of pressure gauges with through-hole components without disassembly and improving the calibration efficiency of pressure gauges with through-hole components.

[0036] In one embodiment, the main body of the calibration and gas replenishment fixture is made of stainless steel and includes the left end connection of the first fixture guide pipe 2 and the integrated three-way valve 3, the integrated three-way valve 3 and the three-way valve 4 excluding the middle pipe section, and the connection of the three-way valve 4 and the second fixture guide pipe 5.

[0037] The method of using this utility model is as follows:

[0038] When calibrating and replenishing the pressure gauge for the electrical penetration component, the proportional unloading valve 6 must first be adjusted to 0.44 MPa.

[0039] Use a high-pressure flexible hose 1 to connect the second tooling guide tube 5 to the component guide tube 8, and use a high-pressure flexible hose to connect the second tooling guide tube 5 to the gas cylinder pressure reducing valve.

[0040] Open component valve 9 of the pressure monitoring component to allow nitrogen gas inside the electrical penetration component to enter the calibration and replenishment fixture through high-pressure flexible gas tube 1. At this time, the reading of pressure gauge 10 in the penetration component will drop slightly. Check the reading of high-precision standard pressure gauge 7 to verify whether the pressure gauge is accurate.

[0041] Slowly open the cylinder pressure reducing valve to allow nitrogen gas from the cylinder to enter the tooling and electrical penetrations through the high-pressure flexible hose. Check the reading of pressure gauge 10 in the penetrations. When the pressure rises to the required value, close the cylinder pressure reducing valve and compare the readings of the high-precision standard pressure gauge 7 and pressure gauge 10 in the penetrations to verify the accuracy of the pressure gauges.

[0042] Close component valve 9 of the pressure monitoring component. The calibration and air replenishment work of the pressure gauge of the electrical penetration component is now complete.

[0043] The above description is only a specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A calibration and air supply fixture for electrical penetration components, characterized in that, The device includes an integrated three-way valve (3), the first port of which is equipped with a pressure gauge (7), the second port of which is connected to a three-way valve (4), and the third port of which is connected to a first tooling guide pipe (2), which is connected to a pressure monitoring component; the first port of the three-way valve (4) is equipped with a proportional unloading valve (6), the second port of which is connected to a second tooling guide pipe (5), which is connected to a gas cylinder.

2. The calibration and air replenishment fixture for electrical penetration components according to claim 1, characterized in that, The first tooling guide pipe (2) is connected to the component valve (9) of the pressure monitoring component.

3. The calibration and air replenishment fixture for electrical penetration components according to claim 2, characterized in that, One end of the component valve (9) is equipped with a component guide pipe (8), which is connected to the first tooling guide pipe (2).

4. The calibration and air replenishment fixture for electrical penetrations according to claim 3, characterized in that, The component guide tube (8) has a pagoda connector.

5. The calibration and air replenishment fixture for electrical penetration components according to claim 1, characterized in that, The third port of the integrated three-way valve (3) has a pagoda connector, which is connected to the first tooling guide tube (2).

6. The calibration and air replenishment fixture for electrical penetrations according to claim 1, characterized in that, The integrated three-way valve (3) and the pressure gauge (7) are connected by threads.

7. The calibration and air replenishment fixture for electrical penetrations according to claim 1, characterized in that, The pressure monitoring assembly includes a through-hole pressure gauge (10), which is mounted on a three-way valve within the pressure monitoring assembly.

8. The calibration and air replenishment fixture for electrical penetrations according to claim 1, characterized in that, The first tooling guide pipe (2) and the integrated three-way valve (3) are welded together.

9. The calibration and air replenishment fixture for electrical penetrations according to claim 1, characterized in that, The three-way valve (4) and the second tooling guide pipe (5) are welded together.

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