Protective ring for overhauling GIL (Gas Insulated Line) device
By designing a protective ring for maintenance of GIL devices, including a tight ring, an elastic ring and a closure cover, the problems of foreign objects entering and equipment damage during maintenance are solved, and a safe and efficient maintenance effect is achieved.
Patent Information
- Application Number
- CN202420523456.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-18
- Publication Date
- 2025-03-14
- Estimated Expiration
- 2034-03-18
AI Technical Summary
During the maintenance of GIL devices, it is difficult to effectively prevent metal powder and other foreign objects from entering the GIL shell, and to prevent objects from falling and damaging internal insulators and casings and other equipment and devices.
A protective ring including a tightening ring, an elastic ring and a closure cover is designed, which is tightly embraces the GIL conductor. The elastic ring is elastically supported on the inner wall of the GIL shell, and the closure cover forms an annular groove to seal and facilitate collection of foreign matters, while buffering the falling debris through the sponge layer.
Effectively enclose the area between the GIL conductor and the shell to prevent foreign objects from entering, and prevent objects from damaging the equipment through buffer pads, achieving a safe and efficient maintenance process.
Smart Images
Figure CN222620508U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of auxiliary tools for maintenance work in hydropower stations, in particular to a protective ring used for maintenance of GIL devices. Background Art
[0002] The operating voltage of the GIL enclosed electrical equipment in the power station is as high as 550kV. Once the internal pollution, especially metal pollution, is found, it may cause discharge failure. Figure 7 , which is a commonly used GIL structure at present, the GIL conductor 20 is located inside the GIL housing 10. During maintenance, especially the maintenance of the vertical section gas chamber of the GIL, corresponding shielding and protection measures need to be taken to prevent metal powder and other foreign matter from entering the GIL housing 10. In addition, it is also necessary to prevent objects from falling and damaging internal insulators, bushings and other equipment components. Utility Model Content
[0003] The technical problem to be solved by the utility model is: to solve the problems existing in the above-mentioned background technology, and to provide a protective ring for GIL device maintenance, wherein the protective ring is clamped on the GIL conductor by a clamping ring, and is elastically supported on the inner wall of the GIL shell by an elastic ring, and the closing cover between the clamping ring and the elastic ring forms an annular groove, which closes the area between the GIL conductor and the GIL shell and can facilitate the collection of metal powder and other foreign matter.
[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a protective ring for GIL device maintenance, comprising a clamping ring, an elastic ring and a closing cover, the closing cover is made of flexible material, the outer ring of the closing cover is installed with an elastic ring, the inner ring of the closing cover is installed with a clamping ring, the elastic ring can be elastically opened outward, the closing cover has a notch in the radial direction, an extension section is provided at one end of the closing cover located at the notch, the clamping ring and the elastic ring are both disconnected rings, and the disconnection point between the clamping ring and the elastic ring is located at the notch; in the use state, the clamping ring is clamped on the GIL conductor, the elastic ring is elastically supported on the inner wall of the GIL shell, the extension section is placed on the other end of the closing cover located at the notch, the extension section closes the notch between the clamping ring and the elastic ring, and the closing cover between the clamping ring and the elastic ring forms an annular groove.
[0005] The holding ring is an elastic ring that contracts inwards.
[0006] The clamping ring is a plastic sheet or steel sheet with a certain flexibility. Both ends of the plastic sheet or steel sheet are respectively provided with connecting sections. Screws are inserted into the connecting sections and nuts are screwed onto the screws. When the nuts are tightened, the clamping ring is tightly clamped onto the GIL conductor.
[0007] A limiting seat is arranged inside one end of the elastic ring, and the other end of the elastic ring can movably pass through the limiting seat.
[0008] The closing cover is made of cloth or leather, and the inner ring and outer ring of the closing cover are respectively sewn with an inner mounting ring cavity and an outer mounting ring cavity, the clamping ring is inserted and installed in the inner mounting ring cavity, and the elastic ring is inserted and installed in the outer mounting ring cavity.
[0009] The closure cover is also provided with a buffer pad between the clamping ring and the elastic ring. The buffer pad comprises a sponge layer, which is composed of a plurality of arc-shaped sponges.
[0010] The buffer pad is provided with a rubber magnetic ring on the upper side of the sponge layer.
[0011] The utility model has the following beneficial effects:
[0012] 1. The utility model is clamped on the GIL conductor by a clamping ring, and elastically supported on the inner wall of the GIL shell by an elastic ring. The closing cover between the clamping ring and the elastic ring forms an annular groove to close the area between the GIL conductor and the GIL shell, and the groove is convenient for collecting metal powder and other foreign matter.
[0013] 2. The utility model provides a sponge layer to cushion the heavy debris that falls, preventing the falling objects from damaging the internal insulators, bushings and other equipment components. A rubber magnetic ring is provided on the upper side of the sponge layer of the buffer pad. When iron filings fall into the GIL housing, they are adsorbed by the rubber magnetic ring, making it easy to collect the iron filings. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The utility model is further described below in conjunction with the accompanying drawings and embodiments.
[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.
[0016] Figure 2 It is a schematic diagram of the cross-sectional structure of the utility model.
[0017] Figure 3 It is a schematic diagram of the three-dimensional structure of the sealing cover of the utility model.
[0018] Figure 4 It is a schematic diagram of the three-dimensional structure of the clamping ring of the utility model.
[0019] Figure 5 It is a schematic diagram of the three-dimensional structure of the elastic ring of the utility model.
[0020] Figure 6 It is a schematic diagram of the three-dimensional structure of the buffer pad of the utility model.
[0021] Figure 7 This is a schematic diagram of the utility model in use.
[0022] Figure 8It is a cross-sectional schematic diagram of the utility model in use state.
[0023] In the figure: a clamping ring 1, a connecting section 11, a screw 12, a nut 13, an elastic ring 2, a limit seat 21, a closing cover 3, an outer mounting ring cavity 31, an inner mounting ring cavity 32, a notch 33, an extension section 34, a buffer pad 4, a sponge layer 41, and a rubber magnetic ring 42;
[0024] GIL housing 10 , GIL conductor 20 . DETAILED DESCRIPTION
[0025] like Figure 1-8 As shown, a protective ring for GIL device maintenance includes a clamping ring 1, an elastic ring 2 and a closing cover 3. The closing cover 3 is made of flexible material, the outer ring of the closing cover 3 is installed with the elastic ring 2, the inner ring of the closing cover 3 is installed with the clamping ring 1, the elastic ring 2 can be elastically opened outward, the closing cover 3 has a notch 33 in the radial direction, and an extension section 34 is provided at one end of the closing cover 3 located at the notch 33. The clamping ring 1 and the elastic ring 2 are both disconnected rings, and the disconnection point between the clamping ring 1 and the elastic ring 2 is located at the notch 33.
[0026] In the use state, the clamping ring 1 is clamped on the GIL conductor 20, the elastic ring 2 is elastically supported on the inner wall of the GIL shell 10, the extension section 34 is placed on the other end of the closing cover 3 located at the gap 33, and the extension section 34 closes the gap 33 between the clamping ring 1 and the elastic ring 2, and the closing cover 3 between the clamping ring 1 and the elastic ring 2 forms an annular groove. The protective ring is clamped on the GIL conductor 20 through the clamping ring 1, and is elastically supported on the inner wall of the GIL shell 10 through the elastic ring 2. The closing cover 3 between the clamping ring 1 and the elastic ring 2 forms an annular groove, which closes the area between the GIL conductor 20 and the GIL shell 10, and the groove is convenient for collecting metal powder and other foreign matter.
[0027] It should be noted that the extension section 34 is also made of flexible material, and its function is to close the gap 33 by being placed on the gap 33. Of course, in order to ensure the stability of the connection between the extension section 34 and the closed cover 3, Velcro can also be installed on the extension section 34 and the closed cover 3.
[0028] In a preferred embodiment, the clamping ring 1 is an elastic ring that contracts inwardly.
[0029] In another preferred embodiment, see Figure 4The clamping ring 1 is a plastic sheet or steel sheet with a certain flexibility. The two ends of the plastic sheet or steel sheet are respectively provided with connecting sections 11. The connecting sections 11 are penetrated with screws 12, and nuts 13 are screwed on the screws 12. When in use, first remove the screws 12 and nuts 13, install the closing cover 3 and the clamping ring 1 on the GIL conductor 20 through the notch 33, penetrate the screws 12, tighten the nuts 13, and clamp the clamping ring 1 on the GIL conductor 20.
[0030] See also Figure 5 A limit seat 21 is arranged inside one end of the elastic ring 2, and the other end of the elastic ring 2 can movably pass through the limit seat 21, so that the upper and lower ends of the elastic ring 2 will not be misaligned.
[0031] See also Figure 3 The closure cover 3 is made of cloth or leather, and the inner ring and outer ring of the closure cover 3 are sewn with an inner mounting ring cavity 32 and an outer mounting ring cavity 31 respectively. Figure 2 The holding ring 1 is inserted into the inner mounting ring cavity 32, and the elastic ring 2 is inserted into the outer mounting ring cavity 31. At the same time, the above structure realizes the installation of the holding ring 1 and the elastic ring 2. Specifically, the inner ring and the outer ring of the closing cover 3 are folded and then sewn to form the inner mounting ring cavity 32 and the outer mounting ring cavity 31.
[0032] Of course, in addition to the above-mentioned installation structure, the holding ring 1 and the elastic ring 2 can also be fixed on the closing cover 3 by bonding.
[0033] See also Figure 1 , 2 6. The sealing cover 3 is also provided with a buffer pad 4 between the clamping ring 1 and the elastic ring 2. The buffer pad 4 includes a sponge layer 41. The sponge layer 41 is composed of multiple arc-shaped sponges. The sponge layer 41 is provided to buffer the heavy debris that falls, so as to prevent the falling object from damaging the internal insulators, bushings and other equipment components.
[0034] Furthermore, in order to collect iron filings, a rubber magnetic ring 42 is provided on the upper side of the sponge layer 41 on the buffer pad 4. When iron filings fall into the GIL housing 10, they are absorbed by the rubber magnetic ring 42. For easy installation, the rubber magnetic ring 42 also has a fracture.
[0035] The action process or principle of the utility model is as follows:
[0036] See also Figure 7 , 8During maintenance, if the GIL conductor 20 is not disconnected, first pull one end of the elastic ring 2 out of the limit seat 21, remove the screw 12 and nut 13 on the clamping ring 1, install the elastic ring 2, the closing cover 3 and the clamping ring 1 on the GIL conductor 20 through the notch 33, insert one end of the elastic ring 2 into the limit seat 21, tighten the elastic ring 2 inward, place the elastic ring 2 in the GIL housing 10, the elastic ring 2 opens the closing cover 3 under its own elastic force, and the outer ring of the closing cover 3 is fixed to the GIL housing 10. Then insert the screw 12 into the clamping ring 1, tighten the nut 13, and clamp the clamping ring 1 on the GIL conductor 20. Then put the extension section 34 on the notch 33 of the closing cover 3, and then place the buffer pad 4.
[0037] When the GIL conductor 20 is in a disconnected state, the protective ring of the present application can be directly put on the GIL conductor 20. After being put on the GIL conductor 20, the specific installation method is roughly the same as the above installation method, which will not be repeated.
Claims
1. A protective ring for GIL device maintenance, characterized in that: The device comprises a clamping ring (1), an elastic ring (2) and a closed cover (3), wherein the closed cover (3) is made of a flexible material, the outer ring of the closed cover (3) is mounted with the elastic ring (2), the inner ring of the closed cover (3) is mounted with the clamping ring (1), the elastic ring (2) can be elastically opened outward, the closed cover (3) has a notch (33) in the radial direction, an extension section (34) is arranged at one end of the notch (33) in the closed cover (3), the clamping ring (1) and the elastic ring (2) are both disconnected rings, and the disconnection point between the clamping ring (1) and the elastic ring (2) is located at the notch (33); in the use state, The clamping ring (1) is clamped on the GIL conductor (20), the elastic ring (2) is elastically supported on the inner wall of the GIL housing (10), the extension section (34) is placed on the other end of the closing cover (3) located at the gap (33), the extension section (34) closes the gap (33) between the clamping ring (1) and the elastic ring (2), and the closing cover (3) between the clamping ring (1) and the elastic ring (2) forms an annular groove.
2. The protective ring for GIL device maintenance according to claim 1, characterized in that: The clamping ring (1) is an elastic ring that contracts inwards.
3. The protective ring for GIL device maintenance according to claim 1, characterized in that: The clamping ring (1) is a plastic sheet or a steel sheet with a certain degree of flexibility. The two ends of the plastic sheet or the steel sheet are respectively provided with connecting sections (11). Screws (12) are inserted into the connecting sections (11) and installed. Nuts (13) are screwed onto the screws (12). When the nuts (13) are tightened, the clamping ring (1) is clamped onto the GIL conductor (20).
4. The protective ring for GIL device maintenance according to claim 1, characterized in that: A limiting seat (21) is provided on the inner side of one end of the elastic ring (2), and the other end of the elastic ring (2) can movably pass through the limiting seat (21).
5. The protective ring for GIL device maintenance according to claim 1, characterized in that: The closure cover (3) is made of cloth or leather, and the inner ring and outer ring of the closure cover (3) are respectively sewn with an inner mounting ring cavity (32) and an outer mounting ring cavity (31), the clamping ring (1) is inserted into and mounted in the inner mounting ring cavity (32), and the elastic ring (2) is inserted into and mounted in the outer mounting ring cavity (31).
6. The protective ring for GIL device maintenance according to claim 1, characterized in that: The sealing cover (3) is also provided with a buffer pad (4) between the clamping ring (1) and the elastic ring (2); the buffer pad (4) comprises a sponge layer (41); the sponge layer (41) is composed of a plurality of arc-shaped sponges.
7. The protective ring for GIL device maintenance according to claim 6, characterized in that: The buffer pad (4) is provided with a rubber magnetic ring (42) on the upper side of the sponge layer (41).