Auxiliary positioning device for SF6 gas leakage detection

Abstract

The auxiliary positioning device comprises a multi-site detection chamber, a gas gathering device and a pipeline, the multi-site detection chamber comprises a plurality of independent detection chambers, the bottoms of the independent detection chambers are provided with openings, the tops of the independent detection chambers are provided with gas collecting hoods, the tops of the gas collecting hoods are connected to the gas gathering device through the pipeline, and the gas gathering device is connected to the gas gathering device through the pipeline. A valve is arranged on the pipeline at the top of the gas collecting hood, and the gas collector is connected with a detection instrument through an instrument connector. The device is simple in structure and convenient to use, can be repeatedly used, and can detect a plurality of point positions at a time and quickly determine the position of a leakage point in a partitioned detection manner in a closed space; a quantitative leak detection interface is provided, and the detection precision is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of gas leak detection auxiliary devices, in particular to an SF6 gas leak detection auxiliary positioning device. Background Art

[0002] SF6 gas, or sulfur hexafluoride, is a colorless, odorless, non-toxic, and non-flammable inert gas. SF6 is a strongly electronegative gas, and its molecules easily adsorb free electrons to form massive negative ions, weakening the collision ionization process in the gas. Therefore, its electrical insulation strength is very high. In the power industry, it is widely used as an insulating and arc-extinguishing medium in electrical equipment such as high-voltage circuit breakers, GIS combination electrical appliances, mutual inductors, high-voltage cables, and transformers. SF6 gas-insulated fully enclosed switchgear occupies much smaller space than conventional open high-voltage distribution equipment, and its operation is not affected by external meteorological and environmental conditions. It can also be used in ultra-high voltage and ultra-high voltage power systems and distribution networks, and is therefore widely used in the power industry.

[0003] SF6 gas filling equipment needs to be tested for sealing after it is newly built or overhauled. Currently, the local bandaging method is used for quantitative leak detection. This method requires covering the installation connection surface of each gas chamber with plastic cloth and sealing it with tape, and then performing leak detection after 24 hours. Although the existing method is accurate in testing one by one, it is a large project and can only detect one detection point at a time. The regulations require that the sealing test only requires qualitative leak detection, and quantitative leak detection using the local bandaging method is performed in case of abnormalities. However, after an abnormality occurs, the network often cannot determine the location of the leak point, and it is necessary to test it one by one or re-position the test through other detection methods, resulting in low detection efficiency. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose an SF6 gas leak detection auxiliary positioning device.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] An auxiliary positioning device for SF6 gas leak detection includes a multi-point detection chamber, a gas collector and a pipeline. The multi-point detection chamber includes multiple independent detection chambers, the bottoms of the independent detection chambers are open, and a gas collection hood is provided on the top of the independent detection chamber. The top of the gas collection hood is connected to the gas collector through a pipeline. A valve is provided on the pipeline on the top of the gas collection hood, and the gas collector is connected to a detection instrument through an instrument connector.

[0007] There are more than two independent testing rooms;

[0008] The independent detection chambers are arranged in a rectangular shape, and are fitted together and arranged in a rectangular array.

[0009] The multi-site detection room is provided with a soft enclosure outside, which is used to fit the detected position as closely as possible to achieve a sealing effect during detection.

[0010] A partition is provided on the top of the multi-site detection chamber, and the gas collecting hood is provided through the partition.

[0011] The gas collector is divided into a sub-gas collector and a main gas collector, and there are more than two sub-gas collectors. The independent detection chamber is connected to the sub-gas collector through a pipeline, and the sub-gas collector is connected to the main gas collector through a pipeline;

[0012] The gas distributor and collector are provided with a plurality of branch pipe joints and a gas collecting pipe joint, and a pipe joint is provided on the top of the gas collecting hood. The pipe joint and the branch pipe joints are connected through a gas distribution pipe, and a valve is provided at the position of the branch pipe joint;

[0013] The main gas concentrator is provided with a plurality of aggregation joints and an instrument joint, and the gas concentrator pipe joints on the sub-gas concentrators are connected to the aggregation joints through the aggregation gas pipes;

[0014] A shell is provided above the multi-site detection chamber, the gas collector and the pipeline are provided in the shell, the side wall of the shell is provided with through holes and open slots, the gas collectors are fixed on the inner wall of the shell respectively, the instrument connector on the gas collector corresponds to the position of the through hole and extends out of the shell; the position of the valve corresponds to the position of the open slot, and the valve extends out of the shell, which is convenient for connecting the detection instrument and controlling the switch of the valve.

[0015] A top plate is provided on the top of the shell, and a handle is provided on the top plate for easy movement during use.

[0016] The shell and top plate are hard transparent acrylic plates, which can easily correspond to the valve positions corresponding to the independent detection chambers.

[0017] The beneficial effects of the utility model are: simple structure, easy to use, reusable, partition detection in a confined space, multiple points can be detected at one time, and the leak point location can be quickly determined; a quantitative leak detection interface is provided to improve detection accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is the internal structure diagram of the utility model;

[0019] Figure 2 This is the overall structural diagram of the utility model;

[0020] Figure 3 This is an exploded structural diagram of the utility model;

[0021] In the figure: 1. Independent detection room; 2. Gas collecting hood; 21. Pipe joint; 22. Gas distribution pipe; 3. Gas distribution and collection device; 31. Branch pipe joint; 32. Valve; 33. Gas collection pipe joint; 34. Gas collection pipe; 4. Total gas collection device; 41. Collection joint; 42. Instrument joint; 5. Partition; 6. Soft enclosure; 7. Shell; 71. Through hole; 72. Opening slot; 8. Top plate; 81. Handle. DETAILED DESCRIPTION

[0022] The following is a clear and complete description of the technical solution of the present invention in conjunction with the embodiments. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] Example 1

[0024] The utility model provides an auxiliary positioning device for SF6 gas leak detection, which has the following structure: it includes a multi-point detection chamber, a gas collector and a pipeline. The multi-point detection chamber includes two independent detection chambers 1, and the two independent detection chambers 1 are arranged in parallel and close together. The bottom of the independent detection chamber 1 is open, and a gas collection cover 2 is provided on the top of the independent detection chamber 1. The top of the gas collection cover 2 is connected to the gas collector through a pipeline. A valve 32 is provided on the pipeline between the gas collection cover 2 and the gas collector, and the gas collector is connected to the detection instrument through an instrument connector 42.

[0025] A soft enclosure 6 is provided outside the multi-site detection room.

[0026] Example 2

[0027] Combined with the drawings and descriptions of the drawings, the utility model provides an SF6 gas leak detection auxiliary positioning device, which comprises a multi-point detection chamber, a gas collector and a pipeline. The multi-point detection chamber comprises 9 independent detection chambers 1,

[0028] The independent detection chambers 1 are rectangular in configuration, and are fitted together and arranged in a 3×3 rectangular array. The bottom of the independent detection chamber 1 is open, and a gas collection hood 2 is provided on the top of the independent detection chamber 1. A partition 5 is provided on the top of the multi-site detection chamber, and the gas collection hood 2 is provided through the partition 5.

[0029] The gas collector is divided into a sub-gas collector 3 and a main gas collector 4. There are three sub-gas collectors 3. The independent detection chamber 1 is connected to the sub-gas collector 3 through a pipeline. The sub-gas collector 3 is connected to the main gas collector 4 through a pipeline.

[0030] The gas collector 3 is provided with a plurality of branch pipe joints 31 and a gas collecting pipe joint 33. The top of the gas collecting hood 2 is provided with a pipe joint 21. The pipe joint 21 and the branch pipe joint 31 are connected by a gas distribution pipe 22. A valve 32 is provided at the position of the branch pipe joint 31.

[0031] The main gas concentrator 4 is provided with a plurality of collecting joints 41 and an instrument joint 42. The gas collecting pipe joint 33 on the sub-gas concentrator 3 is connected to the collecting joint 41 through the collecting gas pipe 34. The main gas concentrator 4 is connected to the detection instrument through the instrument joint 42.

[0032] A soft enclosure 6 is provided around the multi-site detection chamber; a shell 7 is provided above the multi-site detection chamber, and a through hole 71 and an opening slot 72 are provided on the side wall of the shell 7. Three gas collectors 3 are provided on three side walls of the shell 7, and the main gas collector 4 is provided on the other side wall of the shell 7. The instrument connector 42 corresponds to the position of the through hole 71 and extends outside the shell 7; the valve 32 corresponds to the position of the opening slot 72 and extends outside the shell 7;

[0033] A top plate 8 is provided on the top of the housing 7, and a handle 81 is provided on the top plate 8;

[0034] The shell 7 and the top plate 8 are hard transparent acrylic plates;

[0035] When in use, align the bottom of the multi-site detection chamber with the position to be detected, connect the detection instrument at the instrument connector 42, first open all valves 32 to detect the entire position; if there is no leak, continue to detect other positions; if a leak is found, close all valves 32, and open the valves 32 in turn to detect and check the areas of the independent detection chamber 1 in turn.

Claims

1. An auxiliary positioning device for SF6 gas leak detection, characterized in that: It includes a multi-site detection chamber, a gas collector and a pipeline. The multi-site detection chamber includes multiple independent detection chambers. The bottom of the independent detection chamber is open. A gas collecting hood is set on the top of the independent detection chamber. The top of the gas collecting hood is connected to the gas collector through a pipeline. A valve is set on the pipeline on the top of the gas collecting hood. The gas collector is connected to the detection instrument through an instrument connector.

2. The SF6 gas leak detection auxiliary positioning device according to claim 1, characterized in that: There are more than two independent detection chambers; the independent detection chambers are arranged in a rectangular shape, and the independent detection chambers are fitted together and arranged in a rectangular array.

3. The SF6 gas leak detection auxiliary positioning device according to claim 2, characterized in that: A soft enclosure is provided outside the multi-site detection room.

4. The SF6 gas leak detection auxiliary positioning device according to claim 3, characterized in that: A partition is provided on the top of the multi-site detection chamber, and the gas collecting hood is provided through the partition.

5. The SF6 gas leak detection auxiliary positioning device according to claim 4, characterized in that: The gas collector is divided into a sub-gas collector and a main gas collector, and there are more than two sub-gas collectors. The independent detection chamber is connected to the sub-gas collector through a pipeline, and the sub-gas collector is connected to the main gas collector through a pipeline; The gas distributor and collector are provided with a plurality of branch pipe joints and a gas collecting pipe joint, and a pipe joint is provided on the top of the gas collecting hood. The pipe joint and the branch pipe joints are connected through a gas distribution pipe, and a valve is provided at the position of the branch pipe joint; The main gas concentrator is provided with a plurality of aggregation joints and an instrument joint, and the gas concentrator pipe joints on the sub-gas concentrators are connected to the aggregation joints via aggregation gas pipes.

6. The SF6 gas leak detection auxiliary positioning device according to claim 5, characterized in that: A shell is arranged above the multi-site detection chamber, the gas collector and the pipeline are arranged in the shell, the side wall of the shell is provided with a through hole and an open groove, the gas collector is fixed on the inner wall of the shell respectively, the instrument connector on the gas collector corresponds to the position of the through hole and extends out of the shell; the valve corresponds to the position of the open groove, and the valve extends out of the shell.

7. The SF6 gas leak detection auxiliary positioning device according to claim 6, characterized in that: A top plate is provided on the top of the shell, and a handle is provided on the top plate.

8. The SF6 gas leak detection auxiliary positioning device according to claim 7, characterized in that: The shell and the top plate are hard transparent acrylic plates.

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