A sleeve helium leak detection tool

Abstract

The utility model discloses a kind of sleeve helium leak detection tool, including several sleeves, connecting pipeline, several gas on-off control devices, barometer;Sleeve is arranged two rows in parallel;Connecting pipeline is located sleeve side, and connects all sleeve;Gas on-off control device is located at the connecting pipeline of sleeve connection;Gas on-off control device includes a group of vacuum clamp and vacuum ball valve being arranged between vacuum clamp on connecting pipeline in parallel;Connecting pipeline one end is equipped with vacuum extraction port and helium inlet, and the other end is equipped with gas outlet;Barometer is located at the vacuum extraction port one end of connecting pipeline, and barometer is located at the side of connecting pipeline away from its side sleeve.The sleeve helium leak detection tool of the application, when preliminary overall detection is unqualified, can control vacuum ball valve on each branch, quickly, independently isolate and screen out specific leakage sleeve, without disassembling other qualified components, greatly improve the investigation efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of helium leak detection, and specifically relates to a helium leak detection tool for a sleeve. Background Technology

[0002] In the power, chemical, and energy sectors, bushings serve as crucial insulation and support components, and their sealing performance is paramount. Currently, the mainstream technology for helium leak detection of batch bushings is the single-bucket series detection method. This method typically connects multiple bushings in series through complex piping and valves to form a complete circuit, which is then connected to a helium mass spectrometer leak detector. During detection, the entire series system needs to be simultaneously evacuated and filled with helium, and then the leak detector is used to determine if a leak exists.

[0003] However, this existing technology has significant shortcomings. First, its detection efficiency is low. When the leak detector alarms and indicates a leak, because all bushings are in the same connected system, it is impossible to quickly pinpoint which bushing is leaking. Operators must isolate each bushing from the system and repeat the vacuuming, inflation, and testing process, which is cumbersome and time-consuming. Second, its reliability is questionable. The series system involves numerous pipe connections and valves, and even a minor leak at any interface can lead to a misjudgment of the entire system, interfering with the accurate assessment of the bushing's sealing performance. Furthermore, this method is complex to operate, requires a high level of experience from on-site operators, and is prone to introducing new sealing problems during repeated disassembly and reassembly.

[0004] Therefore, the above problems urgently need to be solved. Utility Model Content

[0005] Purpose of the utility model: In order to overcome the above shortcomings, the purpose of this utility model is to provide a casing helium leak detection tool, which effectively overcomes the defects of the prior art by adopting a parallel pipeline design and integrating a vacuum ball valve and a pressure gauge.

[0006] Technical Solution: To achieve the above objectives, this utility model provides a helium leak detection fixture for casings, comprising several casings, connecting pipes, several gas on / off control devices, and a pressure gauge; the casings are arranged in two rows side by side; the connecting pipes are located beside the casings and connect all the casings; the gas on / off control devices are located at the connecting pipes connected to the casings; the gas on / off control devices include a set of vacuum clamps arranged side by side on the connecting pipes and a vacuum ball valve located between the vacuum clamps; one end of the connecting pipes is provided with a vacuum port and a helium inlet, and the other end is provided with a gas outlet; the pressure gauge is located at the vacuum port end of the connecting pipes, and the pressure gauge is located on the side of the connecting pipes away from the casings beside it. By connecting two rows of sleeves in parallel through a connecting pipe, simultaneous vacuuming and gas filling of multiple sleeves is achieved, which greatly improves the initial detection efficiency compared to individual detection. The placement of the vacuum port, helium inlet, and outlet facilitates connection with external vacuum pumps, helium sources, and other equipment. Placing the barometer at the end of the connecting pipe away from the sleeve group allows for more accurate measurement of the overall pressure of the main pipeline, avoiding interference from local airflow near the sleeves and ensuring the reliability of the initial state judgment.

[0007] Furthermore, the gas on / off control device is also installed on the connecting pipe next to the barometer. When it is necessary to calibrate, replace, or repair the barometer, this gas on / off control device can isolate the barometer independently without disrupting the entire vacuum environment, which facilitates maintenance and protects the precision instrument.

[0008] Furthermore, a set of gas on / off control devices is installed on the connecting pipe where the helium inlet is located, and the gas on / off control devices are located on the connecting pipes on both sides of the vacuum port. This achieves physical isolation between the vacuuming process and the helium filling process, prevents helium from flowing back into the vacuum pump, protects the vacuum pump oil from contamination, extends equipment life, ensures the purity of the helium concentration, and improves leak detection sensitivity.

[0009] Furthermore, the gas on / off control device is also installed on the connecting pipe next to the gas outlet. During the vacuuming and pressure holding leak detection stages, the gas on / off control device at the gas outlet can completely seal the entire fixture into a sealed container, achieving accurate leak detection.

[0010] Furthermore, the connecting pipes between the sleeves are also equipped with several vacuum clamps, and the vacuum port is also equipped with a vacuum clamp. This reduces the possibility of leakage due to connection problems of the tooling itself, thereby reducing the risk of misjudgment and ensuring that the leak detection result accurately reflects the sealing condition of the sleeve itself rather than the tooling. Furthermore, a sealing ring is provided on the contact surface between the vacuum clamp and the connecting pipe. The sealing ring deforms when the clamp is tightened, filling the tiny gaps between the metal pipes, thereby forming a reliable elastic sealing barrier that can effectively prevent gas leakage.

[0011] As can be seen from the above technical solution, this utility model has the following beneficial effects: 1. This utility model provides a helium leak detection tool for sleeves, which enables efficient batch detection and rapid leak location. When the initial overall inspection fails, the specific leaking sleeve can be quickly and independently isolated and screened by controlling the vacuum ball valves on each branch, without disassembling other qualified parts, which greatly improves the inspection efficiency. 2. This utility model provides a helium leak detection tool for casing, which improves the reliability and accuracy of the detection. The optimized pipeline layout and the vacuum clamps and sealing rings set in key parts minimize potential leakage points, ensuring that the detection results truly reflect the sealing status of the casing. The operation process is also simpler and more standardized. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of a sleeve helium leak detection tool according to the present invention; Figure 2 for Figure 1 A magnified view of a portion of region A in the middle; Figure 3 for Figure 1 A magnified view of a portion of region B in the middle; Figure 4 for Figure 1 A magnified view of a portion of region C in the middle; Figure 5 This is a schematic diagram of the structure of the inner sealing ring of the vacuum clamp in a helium leak detection tool for a sleeve according to the present invention; In the picture: 1-Casing; 2-Connecting pipe; 21-Vacuum port; 22-Helium gas inlet; 23-Gas outlet; 3-Gas on / off control device; 31-Vacuum clamp; 32-Vacuum ball valve; 311-Sealing ring; 4-Barometer. Detailed Implementation

[0013] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model. Example

[0014] In this embodiment, as Figures 1 to 4 This utility model discloses a helium leak detection fixture for sleeves, including several sleeves 1, connecting pipes 2, several gas on / off control devices 3, and a barometer 4; the sleeves 1 are arranged in two rows side by side; the connecting pipes 2 are located beside the sleeves 1 and connect all the sleeves 1; the gas on / off control devices 3 are located at the connecting pipes 2 connected to the sleeves 1; the gas on / off control devices 3 include a set of vacuum clamps 31 arranged side by side on the connecting pipes 2 and a vacuum ball valve 32 located between the vacuum clamps 31; one end of the connecting pipes 2 is provided with a vacuum port 21 and a helium inlet 22, and the other end is provided with an outlet 23; the barometer 4 is located at one end of the vacuum port 21 of the connecting pipes 2, and the barometer 4 is located on the side of the connecting pipes 2 away from the sleeves 1 beside it.

[0015] Specifically, it is preferable to set the sleeve 1 in two rows, with four in one row.

[0016] In particular, the two rows of sleeves 1 can be arranged in an alternating manner as an option, rather than being completely aligned. This can make more efficient use of space, shorten the length of the connecting pipe 2, and reduce the internal volume of the entire tooling, thereby speeding up the vacuuming process and improving leak detection sensitivity.

[0017] Specifically, quick-connect vacuum clamps are optional for the vacuum clamp 31 at the interface between the sleeve 1 and the connecting pipe 2, which facilitates the installation and disassembly of the sleeve 1 and improves the testing efficiency.

[0018] In this embodiment, as Figure 1 and Figure 2 The gas on / off control device 3 is also provided on the connecting pipe 2 next to the barometer 4.

[0019] Specifically, the gas on / off control device 3 on the connecting pipe 2 next to the barometer 4 can be replaced with a vacuum angle valve or a diaphragm valve as an option.

[0020] In this embodiment, as Figure 1 and Figure 2 A set of gas on / off control devices 3 are provided on the connecting pipe 2 where the helium inlet 22 is located, and the gas on / off control devices 3 are located on the connecting pipe 2 on both sides of the vacuum port 21.

[0021] Specifically, the set of gas on / off control devices 3 on the connecting pipe 2 where the helium inlet 22 is located can be replaced by a pneumatic or electric vacuum ball valve as an option, and linked with an external central controller; the switching sequence is controlled by a program to achieve one-button process switching, avoid human error, and ensure process consistency.

[0022] In this embodiment, as Figure 1 and Figure 3 The gas on / off control device 3 is also provided on the connecting pipe 2 next to the gas outlet 23.

[0023] In particular, in addition to the vacuum ball valve 32, a vacuum safety rupture diaphragm can be connected in series on the connecting pipe 2 next to the air outlet 23 as an option; when the pressure rises abnormally, the diaphragm ruptures to release pressure, providing a final safety guarantee for the tooling and operators.

[0024] In this embodiment, as Figures 1 to 4 The connecting pipe 2 between the sleeves 1 is also provided with a plurality of vacuum clamps 31; the vacuum port 21 is also provided with a vacuum clamp 31.

[0025] Specifically, the vacuum clamp 31 mentioned above can be selected as a single bolt or lever-type quick-release clamp as an option. When it is necessary to replace a section of pipeline or to clean it, the disassembly and assembly can be completed in the shortest time, minimizing downtime.

[0026] In this embodiment, as Figures 1 to 5 A sealing ring 311 is also provided on the contact surface between the vacuum clamp 31 and the connecting pipe 2.

[0027] Specifically, the sealing ring 311 can be made of fluororubber.

[0028] The working principle of the above embodiments is as follows: This utility model discloses a helium leak detection fixture for bushings. When the fixture is in operation, first close the vacuum ball valve 32 next to the helium inlet 22, and open all other vacuum ball valves 32. Vacuum is drawn through the vacuum port 21, and the vacuum level is monitored by the barometer 4. Once the vacuum level is reached, the vacuum port 21 is closed, and the vacuum ball valve 32 next to the helium inlet 22 is opened to fill all bushings 1 with a preset value of helium for leak detection. If the pressure is abnormal, the bushings 1 are isolated one by one by operating the vacuum ball valves 32 of each branch to quickly locate the leak point. The vacuum clamp 31 and its sealing ring 311 ensure a sealed connection throughout the entire process.

[0029] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. A sleeve helium leak detection tool, characterized in that: include: Several sleeves (1) are arranged in two rows side by side; Connecting pipe (2), the connecting pipe (2) is located on the side of sleeve (1) and connects all sleeves (1); Several gas on / off control devices (3) are provided at the connecting pipe (2) connected to the sleeve (1); The gas on / off control device (3) includes a set of vacuum clamps (31) arranged in parallel on the connecting pipe (2) and a vacuum ball valve (32) located between the vacuum clamps (31). The connecting pipe (2) is provided with a vacuum port (21) and a helium inlet (22) at one end, and an outlet (23) at the other end. A barometer (4) is located at one end of the vacuum port (21) of the connecting pipe (2), and the barometer (4) is located on the side of the connecting pipe (2) away from its side sleeve (1).

2. The sleeve helium leak detection tool of claim 1, wherein: The gas on / off control device (3) is also provided on the connecting pipe (2) next to the barometer (4).

3. The sleeve helium leak testing tool of claim 1, wherein: A set of gas on / off control devices (3) is provided on the connecting pipe (2) where the helium inlet (22) is located, and the gas on / off control devices (3) are located on the connecting pipe (2) on both sides of the vacuum port (21).

4. The sleeve helium leak testing tool of claim 1, wherein: The gas on / off control device (3) is also provided on the connecting pipe (2) next to the gas outlet (23).

5. The sleeve helium leak testing tool of claim 1, wherein: The connecting pipe (2) between the sleeves (1) is also provided with several vacuum clamps (31).

6. The sleeve helium leak testing tool of claim 1, wherein: The vacuum port (21) is also provided with the vacuum clamp (31).

7. The casing helium leak detection fixture according to claim 1, characterized in that: A sealing ring (311) is also provided on the contact surface between the vacuum clamp (31) and the connecting pipe (2).

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