Tool for vacuum helium leak detection of pressure pipeline

Abstract

The utility model relates to the technical field of pressure pipeline leak detection, in particular to a tool for vacuum helium leak detection of a pressure pipeline, which comprises a helium cover, a rubber plug, a connecting pipe, a vacuumizing tool and a helium leak detector. A pressure pipeline to be detected is placed in the helium cover, and the helium cover is filled with helium; the rubber plugs are used for plugging two ends of the pressure pipeline; the connecting pipe is used for connecting or disconnecting the vacuumizing tool and the interior of each pressure pipeline; the vacuumizing tool is used for vacuumizing the pressure pipelines through the connecting pipes; the helium leak detector is used for detecting whether the gas pumped out by the vacuumizing tool contains helium or not. When the tool for vacuum helium leak detection of the pressure pipelines is used, the airtightness of a plurality of pressure pipelines can be detected at one time, and the efficiency is high.

Description

Technical Field

[0001] This utility model relates to the field of pressure pipeline leak detection technology, and in particular to a tooling for vacuum helium leak detection of pressure pipelines. Background Technology

[0002] Pressure pipelines used in cryogenic media systems rely on their stable performance to ensure the safety and stability of the system's operation. During the acceptance process upon delivery of pressure pipelines, vacuum helium leak testing is required to verify their airtightness.

[0003] However, existing pressure pipeline leak detection devices can only detect the airtightness of one pressure pipeline at a time, resulting in low leak detection efficiency. Utility Model Content

[0004] This invention provides a tooling for vacuum helium leak detection in pressure pipelines, in order to solve the technical problem of low leak detection efficiency in existing pressure pipelines.

[0005] To solve the above problems, the present invention provides a tooling solution for vacuum helium leak detection of pressure pipelines, which adopts the following technical solution:

[0006] A fixture for vacuum helium leak detection of pressure pipelines includes a helium hood, rubber plugs, connecting pipes, a vacuuming fixture, and a helium leak detector. The helium hood is used to place the pressure pipeline to be leaked and is filled with helium. The rubber plugs are used to seal both ends of the pressure pipeline. The connecting pipes are used to connect or disconnect the vacuuming fixture from the interior of each pressure pipeline. The vacuuming fixture is used to evacuate each pressure pipeline to a vacuum state through the connecting pipes. The helium leak detector is used to detect whether the gas extracted by the vacuuming fixture contains helium.

[0007] The beneficial effects are as follows: When using the tooling for vacuum helium leak detection of pressure pipelines according to this utility model, firstly, both ends of each pressure pipeline are sealed with rubber plugs, and the pressure pipeline is evacuated to a vacuum state using the vacuum tooling. Then, a helium hood is used to enclose the pressure pipeline, helium gas is introduced into the hood, and the helium leak detector is activated to detect the helium leakage rate of the pressure pipeline, ensuring that the helium leakage rate of the pressure pipeline reaches a certain level. For pressure pipelines below the specified level, if the overall vacuum helium leak test reveals a substandard helium leak rate, disconnect one of the connecting pipes and repeat the above steps to test the helium leak rate of the remaining pressure pipelines. This utility model provides a tooling for vacuum helium leak testing of pressure pipelines. In use, it can test the airtightness of multiple pressure pipelines simultaneously, resulting in high efficiency.

[0008] Furthermore, a connector is provided at one end of the pressure pipeline that connects to the connecting pipe. The connector includes a mounting plate and a mounting pipe. The mounting plate is fixedly connected to the rubber plug at the corresponding end of the pressure pipeline. The mounting pipe passes through the mounting plate and the corresponding rubber plug and connects the inside and outside of the pressure pipeline. The end of the mounting pipe outside the pressure pipeline is used to connect to the connecting pipe.

[0009] Beneficial effects: Simple structure, easy to install and connect.

[0010] Furthermore, an installation joint is provided between the installation pipe and the connecting pipe.

[0011] Furthermore, the mounting connector is a KF25 connector.

[0012] Furthermore, each connecting pipe is also equipped with a shut-off valve.

[0013] Beneficial effects: The structure is simple and easy to control the opening and closing of each connecting pipe, which makes it easier to detect leaking pressure pipes.

[0014] Furthermore, the connecting pipe is a corrugated pipe.

[0015] Beneficial effects: The material is soft and easy to connect. At the same time, the corrugated pipe takes up little space during transportation, reducing costs.

[0016] Furthermore, the vacuuming fixture is equipped with multiple connection ports, each corresponding to and connected to a bellows.

[0017] Furthermore, the vacuuming fixture is also equipped with a vacuum breaking port.

[0018] Beneficial effects: It breaks the vacuum effect inside the vacuuming fixture, protects the equipment from dents, cracks, and other damage caused by negative pressure or vacuum. Attached Figure Description

[0019] The above and other objects, features, and advantages of the present invention will become readily understood by reading the following detailed description of exemplary embodiments with reference to the accompanying drawings. In the drawings, several embodiments of the present invention are shown by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0020] Figure 1 This is a schematic diagram of the structure of a tooling for vacuum helium leak detection in pressure pipelines according to the present invention.

[0021] Figure 2 for Figure 1 Enlarged diagram of point A in the middle.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Helium hood; 2. Rubber stopper; 3. Connecting pipe; 4. Vacuuming fixture; 5. Helium leak detector; 6. Mounting plate; 7. Mounting pipe; 8. Mounting connector; 9. Shut-off valve; 10. Connection port; 11. Vacuum breaking port; 12. Vacuum pump; 13. Pressure pipeline. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Those skilled in the art should understand that the embodiments described below are only some, not all, of the embodiments disclosed. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0025] The number of any elements in the accompanying drawings is for illustrative purposes only and not as a limitation, and any naming is for distinction only and has no limiting meaning.

[0026] The principles and spirit of this utility model will be explained in detail below with reference to several representative embodiments.

[0027] Embodiment 1 of a tooling for vacuum helium leak detection in pressure pipelines provided by this utility model:

[0028] like Figure 1 and Figure 2 As shown, the tooling for vacuum helium leak detection of pressure pipelines according to this utility model includes a helium hood 1, a rubber stopper 2, a connecting pipe 3, a vacuuming tooling 4, a connector and a helium leak detector 5.

[0029] The helium hood 1 is used to house multiple pressure pipes 13 to be leak-tested, and the helium hood 1 is connected to a helium source so that the helium hood 1 can be filled with helium.

[0030] The rubber plugs 2 are provided in multiple pairs, and each pair of rubber plugs 2 is set in a one-to-one correspondence with the pressure pipe 13. The two rubber plugs 2 in a pair are respectively sealed at both ends of the corresponding pressure pipe 13.

[0031] like Figure 1 and Figure 2 As shown, multiple connectors are provided, and each connector corresponds to one of the pressure pipes 13. Each connector includes a mounting plate 6, a mounting pipe 7, and a mounting joint 8. The mounting plate 6 is fixed to one of the rubber plugs 2 on the corresponding pressure pipe 13. The mounting pipe 7 passes through the corresponding mounting plate 6 and the rubber plug 2, connecting the inside and outside of the pressure pipe 13. The mounting joint 8 is a KF25 joint, and each mounting joint 8 is connected to the end of the corresponding mounting pipe 7 located outside the pressure pipe 13.

[0032] The connecting pipe 3 is a corrugated pipe and there are multiple of them. Each corrugated pipe is installed in a one-to-one correspondence with each pressure pipe 13, and the corrugated pipe is fixedly connected to the mounting joint 8 on the corresponding pressure pipe 13. Each connecting pipe 3 is also equipped with a shut-off valve 9 so that the operator can control the opening and closing of the connecting pipe 3.

[0033] The vacuuming fixture 4 is equipped with multiple connection ports 10 that communicate with the interior of the vacuuming fixture 4 and a vacuum breaking port 11. Each connection port 10 corresponds to and is connected to each bellows. The vacuuming fixture 4 is also connected to a vacuum pump 12, which is used to extract the gas inside the vacuuming fixture and can also evacuate the pressure pipes 13 to a vacuum state.

[0034] The helium leak detector 5 is connected to the end of the vacuum pump 12 away from the vacuuming fixture 4 to detect whether the gas extracted by the vacuuming fixture 4 contains helium. If the helium leak detector 5 detects that the helium content exceeds the standard, it means that the pressure pipeline 13 is leaking; if the helium leak detector 5 detects that the helium content does not exceed the standard, it means that the pressure pipeline 13 is not leaking [1].

[0035] In use, the tooling for vacuum helium leak detection of pressure pipelines of this utility model first seals both ends of each pressure pipeline 13 with rubber plugs 2 and evacuates each pressure pipeline 13 to a vacuum state using a vacuuming tool 4. Then, a helium hood 1 is used to wrap the pressure pipeline 13, helium is introduced into the helium hood 1, and the helium leak detector 5 is started to detect the helium leakage rate of the pressure pipeline 13, ensuring that the helium leakage rate of the pressure pipeline 13 is below the required leakage rate level. If the helium leakage rate is found to be below the standard during the overall vacuum helium leak detection, the shut-off valve 9 on one of the connecting pipes 3 is disconnected, and the above steps are repeated to detect the helium leakage rate of the remaining pressure pipeline 13.

[0036] The tooling of this utility model for vacuum helium leak detection of pressure pipelines can detect the airtightness of multiple pressure pipelines 13 at one time, with high efficiency.

[0037] Embodiment 2 of the tooling for vacuum helium leak detection in pressure pipelines provided by this utility model:

[0038] Its main difference from Example 1 is:

[0039] In Example 1, a connector is provided at one end of the pressure pipeline connected to the connecting pipe. The connector includes a mounting plate and a mounting pipe. The mounting plate is fixedly connected to the rubber plug at the corresponding end of the pressure pipeline. The mounting pipe passes through the mounting plate and the corresponding rubber plug and connects the inside and outside of the pressure pipeline. The end of the mounting pipe outside the pressure pipeline is used to connect to the connecting pipe.

[0040] In this embodiment, no connector is provided; the connecting tube passes through the rubber plug and extends into the pressure pipeline.

[0041] Embodiment 3 of the tooling for vacuum helium leak detection in pressure pipelines provided by this utility model:

[0042] Its main difference from Example 1 is:

[0043] In Example 1, each connecting pipe is also equipped with a shut-off valve.

[0044] In this embodiment, shut-off valves may not be installed on the connecting pipes. In this case, when it is necessary to disconnect the connection between the connecting pipe and the vacuuming fixture, it is only necessary to disconnect the connecting pipe from the connection port and seal the connection port.

[0045] Embodiment 4 of the tooling for vacuum helium leak detection in pressure pipelines provided by this utility model:

[0046] Its main difference from Example 1 is:

[0047] In Example 1, the vacuuming fixture is provided with multiple connection ports, each of which corresponds to and is connected to a bellows.

[0048] In this embodiment, no connection port is provided, and the connecting tube extends into the vacuuming fixture.

[0049] Embodiment 5 of the tooling for vacuum helium leak detection in pressure pipelines provided by this utility model:

[0050] Its main difference from Example 1 is:

[0051] In Example 1, the vacuuming fixture is also equipped with a vacuum breaking port.

[0052] In this embodiment, no vacuum breaking port is provided.

[0053] Based on the above description in this specification, those skilled in the art will also understand that the following terms used, such as "upper," "lower," "front," "rear," "left," "right," "width," "horizontal," "top," "bottom," "inner," and "outer," are terms indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings of this specification. They are only for the purpose of facilitating the explanation of the present invention and simplifying the description, and do not explicitly or implicitly suggest that the device or element involved must have the specific orientation, or be constructed and operated in a specific orientation. Therefore, the above-mentioned orientation or positional relationship terms should not be understood or interpreted as limitations on the present invention.

[0054] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the methods and techniques disclosed above without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

[0055] In addition, in the description of this specification, "multiple" means at least two, such as two, three or more, etc., unless otherwise expressly and specifically defined.

Claims

1. A tooling for vacuum helium leak detection in pressure pipelines, characterized in that, Includes a helium hood, rubber stopper, connecting pipe, vacuuming fixture, and helium leak detector; The helium hood is used to house the pressure pipes to be leaked and is filled with helium. Rubber stoppers are used to seal both ends of pressure pipes; Connecting pipes are used to connect or disconnect the internal parts of vacuuming fixtures and various pressure pipelines; Vacuuming fixtures are used to evacuate pressure pipelines to a vacuum state through connecting pipes. A helium leak detector is used to detect whether the gas extracted by a vacuuming fixture contains helium.

2. The tooling for vacuum helium leak detection in pressure pipelines according to claim 1, characterized in that, The pressure pipeline is connected to the connecting pipe at one end, and a connector is provided. The connector includes a mounting plate and a mounting pipe. The mounting plate is fixedly connected to the rubber plug at the corresponding end of the pressure pipeline. The mounting pipe passes through the mounting plate and the corresponding rubber plug and connects the inside and outside of the pressure pipeline. The end of the mounting pipe outside the pressure pipeline is used to connect to the connecting pipe.

3. The tooling for vacuum helium leak detection in pressure pipelines according to claim 2, characterized in that, An installation joint is also provided between the installation pipe and the connecting pipe.

4. The tooling for vacuum helium leak detection in pressure pipelines according to claim 3, characterized in that, The mounting connector is a KF25 connector.

5. A tooling for vacuum helium leak detection in pressure pipelines according to any one of claims 1-4, characterized in that, Each connecting pipe is also equipped with a shut-off valve.

6. The tooling for vacuum helium leak detection in pressure pipelines according to claim 5, characterized in that, The connecting pipe is a corrugated pipe.

7. The tooling for vacuum helium leak detection in pressure pipelines according to claim 6, characterized in that, The vacuuming fixture has multiple connection ports, each corresponding to and connected to a bellows.

8. As described in claim 7, characterized in that, The vacuuming fixture is also equipped with a vacuum breaking port.

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