Air tightness detection equipment
By designing the airtightness detection equipment for the GIS terminal tail pipe, the sealing design of the sealing assembly and base structure is used to solve the problem of airtightness detection at the welding, ensuring the sealing of SF6 gas, and avoiding circuit breaker failures and environments threaten.
Patent Information
- Application Number
- CN202323660612.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-29
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2033-12-29
AI Technical Summary
In the manufacturing process of GIS terminal tail pipes, the welding site needs to withstand the airtightness detection problem of no leakage for more than 0.2Mpa air pressure for more than half an hour, which failed to effectively solve the problems that lead to SF6 circuit breaker switch failure and environmental safety threats.
An airtightness detection device is designed, including a sealing assembly and a base structure. The two ends of the components to be tested are sealed by the sealing cover and the base structure, and the sealing cover is abutted by the pressing part to retain the freedom of operation. The base structure is opened. Stomata for airtight detection.
It realizes effective detection of the airtightness of the GIS terminal tail pipe, ensures the sealing at the welding point, avoids SF6 gas leakage, and improves the safety and reliability of the equipment.
Smart Images
Figure CN222166433U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of cable accessory testing, in particular to an air tightness detection device. Background Art
[0002] With the expansion of large-scale urban electricity demand, GIS systems have been widely used at home and abroad. SF6 fully sealed gas-insulated switchgear (GIS) has the advantages of safety, reliability, small footprint, and easy installation and maintenance. The GIS terminal tail pipe is an indispensable accessory, which undertakes the functions of grounding wire lead-out and sealing waterproof and dustproof. During processing, the tail pipe flange and the connection between the aluminum pipe and the grounding bar need to be welded continuously for one week by argon arc welding, and the welding point needs to be polished to remove sharp corners and burrs. Due to the problem of the manufacturing process of the GIS terminal tail pipe, it is necessary to conduct airtightness testing before leaving the factory.
[0003] The current GIS terminal tail pipe manufacturing process requires that the welding point needs to withstand 0.2Mpa air pressure for more than half an hour without leakage. If the air tightness of the GIS terminal tail pipe is not guaranteed, it will cause SF6 circuit breaker switch failure and cause large-scale power outages. The leaked gas will also pose a threat to the environment and personnel safety, causing serious economic losses. Utility Model Content
[0004] The main purpose of the utility model is to provide an air tightness detection device, which is intended to detect the air tightness of the GIS terminal tail pipe.
[0005] To achieve the above-mentioned purpose, the utility model proposes an airtightness detection device, which is used in the technical field of cable accessories. The airtightness detection device includes: a sealing component and a base structure, the base structure is used to place the component to be tested, and both ends of the component to be tested have openings, and it is characterized in that: the base structure seals one end of the component to be tested, and the base structure is provided with an air hole for inflating air into the interior of the component to be tested; the sealing component includes a clamping part and a sealing cover, the sealing cover is arranged at the other end of the component to be tested, and the clamping part abuts against the sealing cover.
[0006] In one embodiment, the clamping part includes a screw, a rocker, a crossbeam thread and a crossbeam, the crossbeam is horizontally arranged above the base structure, the screw sleeve is passed through the crossbeam and fixedly connected to the crossbeam, the screw sleeve is provided with a crossbeam thread, the screw is passed through the screw sleeve and cooperates with the crossbeam thread, the screw is abutted against the sealing cover, and the rocker is connected to one end of the screw away from the sealing cover.
[0007] In one embodiment, the sealing cover includes a tail tube cover and a screw base, the tail tube cover is sleeved on the end of the component to be tested and abuts against the component to be tested, the screw base is arranged on the side of the tail tube cover close to the screw, the screw base abuts against the screw, and an inflation sealing ring groove is provided on the inner side of the tail tube cover abutting against the component to be tested.
[0008] In one embodiment, the base structure includes a bottom plate, columns and a beam groove. The bottom plate is provided with a column hole for the column to pass through. The column is passed through the bottom plate through the column hole and is fixedly connected to the bottom plate. The beam groove is fixedly connected to the upper end of the column. The beam groove is used to fix the end of the beam. The side of the beam groove is provided with an opening for the beam to pass through.
[0009] In one embodiment, there are at least two upright posts, at least two crossbeam grooves, and the distance between the two crossbeam grooves is equal to the length of the crossbeam.
[0010] In one embodiment, the screw base is provided with a limiting groove, and the end of the screw abuts against the limiting groove.
[0011] In one embodiment, the air tightness testing equipment also includes a quick clamp, which includes a plurality of quick clamps, which are fixedly connected to the base structure, and the plurality of quick clamps are arranged at intervals along the circumferential direction of the outer wall of the component to be tested and press one end of the component to be tested close to the base structure above the bottom plate of the base structure.
[0012] The technical solution of the utility model seals the two ends of the component to be tested respectively through a sealing cover and a base structure, and then seals by abutting the sealing cover with a clamping part. The clamping part and the sealing cover are not fixedly connected, and their circumferential freedom is retained, thereby ensuring the safety when operating the clamping part. The base structure is provided with an air hole, which can be connected to an air pipe to inflate the component to be tested, thereby realizing the air tightness detection function. The structure is simple, practical, and easy to disassemble. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0014] Figure 1 This is a schematic diagram of the structure of an airtightness detection device in one embodiment of the utility model;
[0015] Figure 2This is a front structural diagram of an airtightness detection device in one embodiment of the utility model;
[0016] Figure 3 This is a schematic diagram of the overall cross-sectional structure of an airtightness detection device in one embodiment of the utility model;
[0017] Figure 4 for Figure 3 A partial enlarged view of point B in the middle;
[0018] Figure 5 It is a structural schematic diagram of a base structure in one embodiment of the utility model.
[0019] Description of Figure Numbers:
[0020] Label name Label name 1 Joystick 71 Beam slot 2 Screw 72 Column 21 Screw sleeve 73 Base Plate 22 Beam thread 74 Pillar hole 3 Screw base 75 Pores 4 Tail pipe cover 8 Manual clamps 5 beam 9 Base feet 6 Components to be tested 10 Inflatable seal groove 7 Base structure
[0021] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0023] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.
[0024] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0025] Please refer to Figures 1 to 5As shown, the utility model proposes an airtightness detection device, which is used in the technical field of cable accessories. The airtightness detection device includes a sealing component and a base structure 7. The base structure 7 is used to place a component to be tested 6. Both ends of the component to be tested 6 have openings. The characteristics are as follows: the base structure 7 seals one end of the component to be tested 6, and the base structure 7 is provided with an air hole 75 for inflating air into the component to be tested 6; the sealing component includes a clamping part and a sealing cover, the sealing cover is arranged at the other end of the component to be tested 6, and the clamping part abuts the sealing cover.
[0026] In this embodiment, if Figure 1 and Figure 5 As shown, in order to ensure the air tightness of the component to be tested 6, the two ends of the component to be tested 6 are sealed respectively by the sealing cover and the base structure 7, and then the pressing part abuts against the sealing cover for sealing. The pressing part and the sealing cover are not fixedly connected, and the circumferential freedom is retained, thereby ensuring the safety when operating the pressing part; the base structure 7 is provided with an air hole 75, which can be connected to the air pipe to inflate the component to be tested to realize the air tightness detection function. The structure is simple and practical, and it is easy to disassemble and replace the component to be tested 6; the overall structure is simple and practical, and it is convenient for personnel to operate.
[0027] In actual implementation, the specific form of the component to be tested 6 is not specifically limited here, and it is preferably a GIS terminal tail pipe. The fixed connection method of the screw sleeve 21 and the crossbeam 5 is not specifically limited, and it is preferably a welding connection.
[0028] In one embodiment, the clamping part includes a screw 2, a rocker 1, a screw sleeve 21, a crossbeam thread 22 and a crossbeam 5. The crossbeam 5 is horizontally arranged above the base structure 7. The screw sleeve 21 is passed through the crossbeam 5 and fixedly connected to the crossbeam 5. The screw sleeve 21 is provided with a crossbeam thread 22. The screw 2 is passed through the screw sleeve 21 and cooperates with the crossbeam thread 21. The screw 2 is in contact with the sealing cover, and the rocker 1 is connected to the end of the screw 2 away from the sealing cover.
[0029] In this embodiment, if Figure 1 , Figure 2 and Figure 5 As shown, the screw rod 2 is passed through the cross beam 5 and cooperates with the cross beam thread 22 so that the screw rod 2 can be stably pressed down under the support of the cross beam 5, thereby ensuring the safety of the equipment during air tightness testing.
[0030] In actual implementation, the shape of the cross beam 5 is not specifically limited, and is preferably a solid cuboid with a square cross section to improve the reliability of the connection between the cross beam 5 and the screw rod.
[0031] In one embodiment, the sealing cover includes a tail tube cover 4 and a screw base 3. The tail tube cover 4 is sleeved on the end of the component to be tested 6 and abuts against the component to be tested 6. The screw base 3 is arranged on the side of the tail tube cover 4 close to the screw 2. The screw base 3 abuts against the screw 2. An inflation sealing ring groove 10 is provided on the inner side of the tail tube cover 4 abutting against the component to be tested 6.
[0032] In this embodiment, if Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the tail pipe cover 4 is sleeved above the top notch of the component to be tested 6 and abuts against the component to be tested 6, the screw base 3 abuts against the tail pipe cover 4, and the inner side of the tail pipe cover 4 abutting against the component to be tested 6 is provided with an inflation seal ring groove 10. When the screw 2 applies pressure, the tail pipe cover 4 presses the component to be tested 6, and at the same time, cooperates with the sealing ring in the inflation seal ring groove 10 to seal, and the three work together to ensure the air tightness of the component to be tested 6.
[0033] In actual implementation, the material of the tail pipe cover 4 is not specifically limited, and is preferably made of stainless steel.
[0034] In one embodiment, the base structure 7 includes a bottom plate 73, a column 72 and a crossbeam groove 71. The bottom plate 73 is provided with a column hole 74 for the column 72 to pass through. The column 72 is passed through the bottom plate 73 through the column hole 74 and is fixedly connected to the bottom plate 73. The crossbeam groove 71 is fixedly connected to the upper end of the column 72. The crossbeam groove 71 is used to fix the end of the crossbeam 5. The side of the crossbeam groove 71 is provided with an opening for the crossbeam 5 to pass through.
[0035] In this embodiment, if Figure 1 and Figure 5 As shown, an air hole 75 is provided in the center of the bottom plate 73, which can be connected to the air pipe for inflation, reducing the possibility of gas leakage. The upper end of the column 72 is fixedly connected to the beam groove 71, ensuring the safety and reliability of the equipment during air tightness testing. An opening is provided on the side of the beam groove 71 for the beam 5 to pass through, which is convenient for disassembly.
[0036] In actual implementation, the shape of the column 72 is not specifically limited, and is preferably a solid rectangular parallelepiped with a square cross-section. The upper end of the column 72 is fixedly connected to the beam groove 71 by welding, and the shape of the opening set on the side of the beam groove 71 matches the shape of the end of the beam 5, and the opening is slightly larger than the end of the beam 5 to facilitate the installation and disassembly of the beam 5.
[0037] In one embodiment, there are at least two upright posts 72 , at least two crossbeam slots 71 , and the distance between the two crossbeam slots 71 is equal to the length of the crossbeam 5 .
[0038] In this embodiment, if Figure 1 , Figure 2 and Figure 5 As shown, the distance between the crossbeam grooves 71 is equal to the length of the crossbeam 5, thereby ensuring the stability of the crossbeam 5 during installation.
[0039] In actual implementation, there are preferably two upright posts 72 and two crossbeam slots 71 .
[0040] In one embodiment, the screw base 3 is provided with a limiting groove, and the end of the screw 2 abuts against the limiting groove.
[0041] In this embodiment, if Figure 1 and Figure 2 As shown, the limiting groove formed on the screw base 3 abuts against the end of the screw 2, thereby ensuring the stability of the screw 2 and the screw base 3 during the operation of the airtightness detection equipment.
[0042] In actual implementation, the depth of the limiting groove is not limited here.
[0043] In one embodiment, the air tightness testing equipment also includes a quick clamp 8, which includes a plurality of quick clamps 8, which are fixedly connected to the base structure 7, and the plurality of quick clamps 8 are arranged at intervals along the circumferential direction of the outer wall of the component to be tested 6 and press one end of the component to be tested 6 close to the base structure 7 onto the bottom plate 73 of the base structure 7.
[0044] In this embodiment, if Figure 1 , Figure 2 and Figure 3 As shown, the rocker 1 is passed through the screw rod 2, and the screw rod 2 can be rotated conveniently and quickly. A plurality of quick clamps 8 are arranged at intervals along the circumferential direction of the outer wall of the component to be tested 6, ensuring that the component to be tested 6 and the bottom plate 73 are evenly fixed to prevent air leakage. The base foot 9 is fixedly connected to the bottom of the bottom plate 73 to increase the height of the equipment and facilitate the connection of the external ventilation pipe.
[0045] In actual implementation, the material of the rocker 1 is not specifically limited, and is preferably made of stainless steel. The number of the quick clamps 8 is not specifically limited, and is preferably 4.
[0046] The above description is only a preferred embodiment of the utility model, and does not limit the patent scope of the utility model. All equivalent structural changes made by using the contents of the utility model specification and drawings under the concept of the utility model, or directly / indirectly used in other related technical fields are included in the patent protection scope of the utility model.
Claims
1. An airtightness testing device, comprising a sealing assembly and a base structure, wherein the base structure is used to place a component to be tested, and both ends of the component to be tested have openings, characterized in that: The base structure seals one end of the component to be tested, and is provided with an air hole for inflating air into the component to be tested; the sealing assembly includes a pressing portion and a sealing cover, the sealing cover is arranged at the other end of the component to be tested, and the pressing portion abuts against the sealing cover.
2. The airtightness detection device according to claim 1, characterized in that: The clamping part includes a screw, a rocker, a screw sleeve, a crossbeam thread and a crossbeam. The crossbeam is horizontally arranged above the base structure. The screw sleeve is passed through the crossbeam and fixedly connected to the crossbeam. The screw sleeve is provided with a crossbeam thread. The screw is passed through the screw sleeve and cooperates with the crossbeam thread. The screw is in contact with the sealing cover, and the rocker is connected to one end of the screw away from the sealing cover.
3. The airtightness detection device according to claim 2, characterized in that: The sealing cover includes a tail tube cover and a screw base. The tail tube cover is sleeved on the end of the component to be tested and abuts against the component to be tested. The screw base is arranged on a side of the tail tube cover close to the screw. The screw base abuts against the screw. An inflation sealing ring groove is provided on the inner side of the tail tube cover abutting against the component to be tested.
4. The airtightness detection device according to claim 2, characterized in that: The base structure includes a bottom plate, a column and a beam groove. The bottom plate is provided with a column hole for the column to pass through. The column is passed through the bottom plate through the column hole and is fixedly connected to the bottom plate. The beam groove is fixedly connected to the upper end of the column. The beam groove is used to fix the end of the beam. The side of the beam groove is provided with an opening for the beam to pass through.
5. The airtightness detection device according to claim 4, characterized in that: There are at least two upright posts and at least two crossbeam grooves, and the distance between the two crossbeam grooves is equal to the length of the crossbeam.
6. The airtightness detection device according to claim 5, characterized in that: The screw base is provided with a limiting groove, and the end of the screw abuts against the limiting groove.
7. The airtightness detection device according to claim 4, characterized in that: The air tightness testing equipment also includes a quick clamp, which includes a plurality of quick clamps. The quick clamps are fixedly connected to the base structure, and the plurality of quick clamps are arranged at intervals along the circumferential direction of the outer wall of the component to be tested and press one end of the component to be tested close to the base structure above the bottom plate of the base structure.