Nuclear power station pipeline pressure testing device

Abstract

The utility model relates to the nuclear power field, and provides a nuclear power station pipeline pressure test device comprising a plugging plate and a detection assembly, the plugging plate is used for sealing connection with a pipeline, and the detection assembly is connected with the plugging plate; the detection assembly comprises a connector and a plurality of pressure gauges with different pressure detection ranges, the connector is provided with at least four connecting ports which are communicated with one another, one of the connecting ports is communicated with the pipeline, the other connecting port is connected with the pressure release valve, and the rest connecting ports are connected with the pressure gauges; and a valve is arranged between each pressure gauge and the connecting port. According to the utility model, through the arrangement of the plurality of connecting ports, the multi-path pressure gauge can be connected, and each pressure gauge has different pressure detection ranges, so that different pressure gauges can be selected for detection as required, the detection efficiency is improved, and the safety risk caused by frequent pressure relief and pressure increase is avoided.

Description

Technical Field

[0001] This utility model relates to the field of nuclear power technology, and in particular to a pressure testing device for nuclear power plant pipelines. Background Technology

[0002] Nuclear power plants, or nuclear energy power generation, are actually energy conversion processes that transform nuclear energy into thermal energy, mechanical energy, and electrical energy. They are clean energy sources. The latter two energy conversion processes are basically the same as those in conventional thermal power plants, with only slight differences in the technical parameters of the equipment.

[0003] In terms of function, a nuclear reactor is equivalent to the boiler system of a thermal power plant. However, because it is a strong radioactive source, the coolant flowing through the reactor is radioactive and generally should not be directly fed into the steam turbine. Otherwise, it would cause difficulties in the operation and maintenance of the steam turbine generator set. Therefore, a pressurized water reactor nuclear power plant has an additional power loop compared to a conventional power plant. However, the reform process system consists of a loop composed of several pipes, valves, equipment, etc.

[0004] The construction process of a nuclear power plant is quite complex, including several process systems such as safety systems, fire protection systems, and cooling systems. Each system consists of several loops, and each loop consists of several piping units and valves. However, according to specifications and standards, a pressure test must be conducted after installation.

[0005] When conducting pressure tests on pipeline loops with different pressure values, the relevant technologies typically employ a single test path in the pressure testing equipment. This approach is limited by the applicable range of the pressure gauges, leading to repeated depressurization and repressurization, and gauge replacement, when multiple pressure values ​​exist in the same pipeline, in order to complete the pressure test for that loop. This process consumes significant manpower and is time-consuming, potentially wasting the test medium. Furthermore, repeated pressure increases and decreases pose a high safety risk; even slight errors could result in personal injury or property damage, as has been observed in nuclear power plants. Therefore, traditional pressure testing equipment suffers from numerous drawbacks due to its long operating time, significant resource waste, low efficiency, and high safety risks; even slight errors could cause varying degrees of property damage and personal injury. Utility Model Content

[0006] This invention provides a nuclear power plant pipeline pressure testing device to address the shortcomings of existing pipeline pressure testing devices that cannot simultaneously test loops with multiple pressure ranges.

[0007] This utility model provides a pressure testing device for a nuclear power plant pipeline, comprising: a sealing plate and a detection component. The sealing plate is used for a sealed connection with the pipeline, and the detection component is connected to the sealing plate. The detection component includes a connector and multiple pressure gauges with different pressure detection ranges. The connector has at least four interconnected connection ports. One of the connection ports is connected to the pipeline, another of the connection ports is connected to a pressure relief valve, and the remaining connection ports are all connected to the pressure gauges. A valve is provided between each pressure gauge and each connection port.

[0008] The nuclear power plant pipeline pressure testing device provided by this utility model also includes a connector, and each of the ports is provided with a connector.

[0009] According to the nuclear power plant pipeline pressure testing device provided by this utility model, a connecting branch pipe is connected to the sealing plate, one end of the connecting branch pipe is connected to the pipeline, and the other end of the connecting branch pipe is connected to the connector.

[0010] According to the nuclear power plant pipeline pressure testing device provided by this utility model, the connecting branch pipe is threadedly connected to the connector through the connector.

[0011] The nuclear power plant pipeline pressure testing device provided by this utility model also includes a connecting pipeline, which is located between the pressure gauge and the connector.

[0012] According to the nuclear power plant pipeline pressure testing device provided by this utility model, the connecting pipeline is equipped with a valve.

[0013] According to the nuclear power plant pipeline pressure testing device provided by this utility model, the connecting pipeline includes a right-angle connecting pipe, one end of which is connected to the connector through the connector, and the other end of which is connected to the pressure gauge through the connector.

[0014] According to the nuclear power plant pipeline pressure testing device provided by this utility model, the connector includes a four-way connector, the four-way connector includes a first pressure detection passage and a second pressure detection passage, the first pressure detection passage is provided with a first pressure gauge, and the second pressure detection passage is provided with a second pressure gauge.

[0015] According to the nuclear power plant pipeline pressure testing device provided by this utility model, the pressure detection range of the first pressure gauge is smaller than that of the second pressure gauge.

[0016] According to the nuclear power plant pipeline pressure testing device provided by this utility model, the sealing plate is welded or threaded to the pipeline.

[0017] The nuclear power plant pipeline pressure testing device provided by this utility model has multiple connection ports, which can connect to multiple pressure gauges. Each pressure gauge has a different pressure detection range, so different pressure gauges can be selected for testing as needed, which improves testing efficiency and avoids the safety risks caused by frequent depressurization and pressurization. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the nuclear power plant pipeline pressure testing device provided by this utility model.

[0020] Figure label:

[0021] 1. Sealing plate; 11. Connecting branch pipe; 2. Connector; 3. Pressure gauge; 31. First pressure detection passage; 32. Second pressure detection passage; 4. Connecting pipeline; 5. Connecting parts; 6. Pressure relief valve; 7. Valve; 8. Pipeline. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0023] In the description of the embodiments of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the purpose of clarifying the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this utility model according to the specific circumstances.

[0025] In this embodiment of the utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0026] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0027] In the piping systems of nuclear power plants, the same pipeline may contain multiple pressure loops with varying pressure ranges. Related technologies require frequent depressurization and repressurization to switch pressure gauges during testing of such pipelines, which obviously reduces testing efficiency. Furthermore, frequent switching increases the risk of safety accidents and raises overall safety risks.

[0028] To address the issues in the relevant technologies, the following will be discussed in conjunction with... Figure 1This invention describes a pressure testing device for a nuclear power plant pipeline, comprising a sealing plate 1 and a testing component. The sealing plate 1 is used for a sealed connection with a pipeline 8, and the testing component is connected to the sealing plate 1. The testing component includes a connector 2 and multiple pressure gauges 3 with different pressure testing ranges. The connector 2 has at least four interconnected connection ports. One of the connection ports is connected to the pipeline 8, another connection port is connected to a pressure relief valve 6, and the remaining connection ports are all connected to the pressure gauges 3. A valve 7 is provided between each pressure gauge 3 and a connection port. When testing the pressure of the pipeline 8 in the complex piping of a nuclear power plant, it is necessary to frequently change the pressure gauges 3 with different pressure testing ranges. In this embodiment, the connector 2 enables the connection of multiple pressure gauges 3, thereby allowing for rapid switching of pressure gauges 3 in different circuits, improving testing efficiency and safety.

[0029] Specifically, the sealing plate 1 is used to connect with the pipe 8 to be tested and to seal the pressure test location of the pipe 8. The detection component is located on the sealing plate 1 and is connected to the pipe 8, thereby enabling the detection of the pressure inside the pipe 8.

[0030] Understandably, in the complex piping system of a nuclear power plant, the pressure of the same pipe 8 needs to be measured at multiple pressure ranges. In this embodiment, by connecting pressure gauges 3 with different pressure ranges to multiple ports, it is possible to quickly switch between different pressure ranges during testing, thereby improving testing efficiency. This meets the testing needs for different pressure values ​​and reduces the safety risks caused by repeated pressure increases and decreases and gauge replacements, ensuring personnel safety.

[0031] It should be understood that the number of connection ports is not specifically limited in this embodiment, as long as there are more than four connection ports. For example, there can be six connection ports. When there are six connection ports, two of them are connected to the sealing plate 1 and the pressure relief valve 6, and the remaining four connection ports are connected to the pressure gauge 3, thereby increasing its applicability.

[0032] In specific settings, such as Figure 1 As shown, connector 2 includes a four-way connector 2, which includes a first pressure detection passage 31 and a second pressure detection passage 32. A first pressure gauge is installed on the first pressure detection passage 31, and a second pressure gauge is installed on the second pressure detection passage 32. The two pressure detection passages allow for free switching when different pressure ranges are required, thus enabling rapid detection of different pressure ranges.

[0033] Specifically, one connector 2 of the four-way connector 2 is connected to the sealing plate 1, and the remaining connector 2 is connected to the pressure relief valve 6 to form a pressure relief passage. The pressure relief passage allows for pressure relief operations to be performed at any time during switching, improving detection efficiency.

[0034] Furthermore, during switching, the opening and closing of valve 7 can control the on / off state of each pressure detection passage, thereby preventing the medium in pipeline 8 from entering an incompatible passage during detection.

[0035] In specific settings, the pressure detection range of the first pressure gauge is smaller than that of the second pressure gauge. The different detection ranges of pressure gauge 3 allow for broader coverage, enabling selection based on actual conditions and increasing its applicability.

[0036] In a specific implementation, the sealing plate 1 is welded or threaded to the pipe 8. A seal is required between the sealing plate 1 and the pipe 8 to prevent leakage of the medium inside the pipe 8. Welding or threading ensures a stable connection and prevents leakage.

[0037] Working principle: Before manufacturing the pressure testing device, first determine the number of pressure values ​​included in the system loop according to the design drawings or process system flow diagram. Select two appropriate pressure gauges 3 with high and low pressure detection ranges according to the pressure values ​​to ensure that the range of pressure gauges 3 covers all pressures in the system loop, including the pressures required for strength tests and sealing tests.

[0038] When using this pressure testing device, first determine the testing sequence for each pressure in the system loop. Use a pressure boosting device at the lowest point and freely switch between the appropriate pressure gauge 3 via valve 7 in the device. To switch pressure gauge 3, simply close valve 7 before pressure gauge 3 and open valve 7 in the loop under test. Then, sequentially complete all pressure tests in the process system. After each test, open pressure relief valve 6 to release pressure, thus completing all pressure tests.

[0039] According to some embodiments provided by this utility model, a connector 5 is also included, with each port provided with a connector 5. The connector 5 can improve the stability and speed of connection.

[0040] Specifically, the connector 5 can be a threaded connector 5. When it is a threaded connector 5, it is connected to its respective components at both ends by threads, thereby improving connection efficiency. Of course, the threaded connector 5 can also be welded to various components. For example, on the first pressure detection passage 31, one end of the connector 5 is connected to the valve 7 and the other end is connected to one port of the connector 2. In this case, a quick connection between the two is achieved through a threaded connection, or it can be connected by welding.

[0041] In some embodiments, a connecting branch pipe 11 is connected to the sealing plate 1. One end of the connecting branch pipe 11 is connected to the pipe 8, and the other end of the connecting branch pipe 11 is connected to the connector 2. The connecting branch pipe 11 facilitates connection with the connector 2 and improves the connection speed.

[0042] Specifically, the connecting branch pipe 11 is fixedly connected to the sealing plate 1. One end of the connecting branch pipe 11 is located inside the pipe 8, and the other end of the connecting branch pipe 11 protrudes from the upper surface of the sealing plate 1, thereby enabling a quick connection with the connector 2.

[0043] In a specific configuration, the connecting branch pipe 11 is threadedly connected to the connector 2 via connector 5. The threaded connection via connector 5 improves connection efficiency and enables rapid connection.

[0044] In a specific embodiment, the pressure testing device also includes a connecting pipe 4, which is located between the pressure gauge 3 and the connector 2. The connection pipe 4 facilitates the installation and observation of the pressure gauge 3.

[0045] It is understandable that the connector 2 is smaller in size, while a larger connector 2 would not be suitable for installation on the sealing plate 1. In this embodiment, by setting up the connecting pipe 4, the communication space can be extended outward, thereby allowing multiple pressure gauges 3 to be arranged in the space around the connector 2, which is conducive to the installation of the pressure gauges 3.

[0046] In the specific connection path, a valve 7 is installed on the connecting pipe 4. The valve 7 can control the opening and closing of the connecting pipe 4, thereby realizing the switching of different pressure gauges 3.

[0047] In the specific setup, the connecting pipe 4 includes a right-angle connecting pipe. One end of the right-angle connecting pipe is connected to the connector 2 via a connector 5, and the other end of the right-angle connecting pipe is connected to the pressure gauge 3 via a connector 5. The right-angle connecting pipe ensures that the pressure gauge 3 is positioned at the top after connection, facilitating observation of the pressure gauge 3.

[0048] Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment, through the setting of multiple pressure gauges 3, allows for free switching of operation, making it more controllable and practical. It can meet the pressure testing requirements of different test media and different pressure values, saving time and accelerating construction progress, saving manpower and resources, reducing costs, improving labor efficiency, and eliminating personnel safety risks.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A pressure testing device for nuclear power plant pipelines, characterized in that, include: A sealing plate and a detection assembly, wherein the sealing plate is used for a sealing connection with a pipeline, and the detection assembly is connected to the sealing plate; The detection assembly includes a connector and multiple pressure gauges with different pressure detection ranges. The connector has at least four interconnected connection ports. One of the connection ports is connected to the pipeline, another of the connection ports is connected to a pressure relief valve, and the remaining connection ports are all connected to the pressure gauges. A valve is provided between each pressure gauge and each connection port.

2. The nuclear power plant pipeline pressure testing device according to claim 1, characterized in that, It also includes connectors, and each of the ports is provided with a connector.

3. The nuclear power plant pipeline pressure testing device according to claim 2, characterized in that, The sealing plate is connected to a connecting branch pipe, one end of which is connected to the pipeline, and the other end of which is connected to the connector.

4. The nuclear power plant pipeline pressure testing apparatus according to claim 3, characterized in that, The connecting branch pipe is threadedly connected to the connector head via the connector.

5. The nuclear power plant pipeline pressure testing device according to claim 2, characterized in that, It also includes a connecting pipe, which is located between the pressure gauge and the connector.

6. The nuclear power plant pipeline pressure testing apparatus according to claim 5, characterized in that, A valve is installed on the connecting pipeline.

7. The nuclear power plant pipeline pressure testing apparatus according to claim 5, characterized in that, The connecting pipeline includes a right-angle connecting pipe, one end of which is connected to the connector via the connector, and the other end of which is connected to the pressure gauge via the connector.

8. The nuclear power plant pipeline pressure testing apparatus according to claim 1, characterized in that, The connector includes a four-way connector, which includes a first pressure detection channel and a second pressure detection channel. A first pressure gauge is provided on the first pressure detection channel, and a second pressure gauge is provided on the second pressure detection channel.

9. The nuclear power plant pipeline pressure testing apparatus according to claim 8, characterized in that, The pressure detection range of the first pressure gauge is smaller than that of the second pressure gauge.

10. The nuclear power plant pipeline pressure testing apparatus according to claim 1, characterized in that, The sealing plate is welded or threaded to the pipeline.

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