GIS high-voltage switch shell structure with monitoring function

Abstract

The invention relates to a GIS high-voltage switch shell structure with a monitoring function in the field of high-voltage switches, and the structure comprises an upper insulating shell and a lower insulating shell, the upper insulating shell and the lower insulating shell are fixed and hermetically communicated through an additional cylinder, the peripheral side of the additional cylinder is provided with a through hole, the through hole is provided with a prompt member, and the prompt member is connected with the upper insulating shell and the lower insulating shell. The prompt piece reflects the air pressure change in the added cylinder body through deformation or stretching; a sealing structure used for sealing the prompting part is further installed on the additionally-installed cylinder body and used for enabling the prompting part to be kept sealed after deformation or stretching out and drawing back, and by means of the structure, when air pressure in the additionally-installed cylinder body changes, the air pressure change result can be directly obtained by observing the size of the prompting air bag or the position of the prompting rod; according to the SF6 gas leakage detection device, SF6 gas leakage can be visually observed by a worker, timely maintenance can be carried out, and in addition, the shell structure is more stable and reliable through the arrangement of the flexible sealing body, the inner pressing ring bag or the sealing ring.

Description

Technical Field

[0001] The present invention relates to a GIS high-voltage switch housing structure with a monitoring function, in particular to a GIS high-voltage switch housing structure with a monitoring function applied in the field of high-voltage switches. Background Art

[0002] GIS high-voltage switches are high-voltage disconnectors filled with SF6 gas (sulfur hexafluoride) as an insulating and arc-extinguishing medium. Their primary function is to isolate the high-voltage GIS primary circuit. They feature a cast aluminum housing and shielding covers for both the moving and static contacts. Furthermore, because the induced magnetic field on the GIS housing is very small, eddy current losses are minimal, reducing power loss and leading to widespread use of GIS high-voltage switches.

[0003] The GIS high-voltage switch housing needs to have good sealing properties to prevent internal SF6 gas leakage. During long-term use, with the aging of the sealing structure and other problems, the sealing of each connection will inevitably have problems, leading to SF6 gas leakage.

[0004] However, the GIS high-voltage switch housing in the existing technology cannot reflect the leakage problem. When a leak occurs, the staff needs to check it themselves to find it, which makes it difficult for the staff to detect the leakage of SF6 gas in time and unable to carry out corresponding maintenance in time. Therefore, a GIS high-voltage switch housing structure with a monitoring function is proposed to improve the above problem. Summary of the Invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is how to provide a GIS high-voltage switch housing structure with a leakage monitoring function so that workers can detect gas leakage in a timely manner.

[0006] To solve the above problems, the present invention provides a GIS high-voltage switch housing structure with a monitoring function, comprising an upper insulating housing and a lower insulating housing. The upper and lower insulating housings are fixed and sealed together by an additional cylinder. A through hole is formed on the circumference of the additional cylinder, and a prompt member is installed in the through hole. The prompt member reflects the air pressure change in the additional cylinder by deformation or expansion.

[0007] A sealing structure for sealing the prompting piece is also installed on the additional cylinder, and the sealing structure is used to keep the prompting piece sealed after deformation or expansion and contraction.

[0008] In the above-mentioned GIS high-voltage switch housing structure with a monitoring function, the setting of the prompt member allows the prompt member to directly reflect the pressure change when the gas pressure in the installed cylinder changes, so that the staff can visually observe the SF6 gas leakage and carry out timely maintenance;

[0009] In addition, through the setting of the sealing structure, the connection between the prompt member and the installation cylinder always maintains a good sealing effect, thereby ensuring that the prompt given by the prompt member is more accurate, reducing the risk of leakage at the installation point of the prompt member, and making the shell structure more stable and reliable.

[0010] As a further improvement of the present application, the prompt member includes a prompt airbag, the prompt airbag fixing cover is arranged on the outside of the through hole, the prompt airbag is fixed to the outer side wall of the additional cylinder, and the prompt airbag is connected to the through hole.

[0011] As a further improvement of the present application, a receiving groove is provided on the side wall of the additional cylinder body that is in contact with the prompt airbag, and the sealing structure includes a flexible sealing body that is movably embedded in the receiving groove;

[0012] A driving mechanism is also installed in the installation cylinder, and the driving mechanism drives the flexible sealing body to move as the air pressure in the installation cylinder changes.

[0013] As a further improvement of the present application, an embedding groove is provided on the inner side of the mounting cylinder, and an active cavity with a sealing inner flange formed at the lower end is also provided in the mounting cylinder, and a connecting hole is provided between the active cavity and the embedding groove;

[0014] The driving mechanism includes a flexible pressure-bearing body, a movable column, and a compression spring. The flexible pressure-bearing body is fixedly embedded in the opening of the embedding groove and closes the embedding groove. The flexible pressure-bearing body deforms as the air pressure in the installation cylinder changes. The deformation of the flexible pressure-bearing body includes concave deformation into the embedding groove or convex deformation into the installation cylinder.

[0015] The movable column is slidably installed in the movable cavity. One end of the movable column passes through the movable cavity and is fixed with a bottom plate fixed to the flexible sealing body. The end of the movable column away from the flexible sealing body is fixed with a top plate. The top plate is located above the connection between the connecting hole and the movable cavity. The upper and lower ends of the compression spring are respectively fixed to the top of the movable cavity and the top plate.

[0016] As a further improvement of the present application, the sealing structure also includes an inner pressure ring bag, which is a closed bag body. The inner pressure ring bag is fixed to the outer wall of the mounting cylinder, and the inner pressure ring bag presses the connection between the air bag and the mounting cylinder.

[0017] As another improvement of the present application, the prompt member includes a prompt rod, which slides through the through hole. An inner plate is fixed to one end of the prompt rod located inside the mounting cylinder, and an outer plate is fixed to the other end of the prompt rod located outside the mounting cylinder. Both the outer plate and the inner plate are attached to and adapted to the side wall of the mounting cylinder.

[0018] As a further improvement of the present application, the sealing structure includes a flexible sealing body and a sealing ring, and a receiving groove is provided on the side wall of the additional cylinder that is in contact with the upper and lower ends of the outer plate, and the flexible sealing body is movably embedded in the receiving groove;

[0019] The inner side of the mounting cylinder is provided with an embedding groove and a movable cavity, a connecting hole is provided between the movable cavity and the embedding groove, and a sealing inner flange is integrally formed at the lower end of the movable cavity to separate the movable cavity from the accommodating groove;

[0020] A flexible pressure-bearing body with a closed embedding groove is fixedly embedded at the opening of the embedding groove. The flexible pressure-bearing body deforms as the air pressure in the installation cylinder changes. The deformation of the flexible pressure-bearing body includes concave deformation into the embedding groove and convex deformation into the installation cylinder.

[0021] A movable column is slidably installed in the movable cavity, one end of the movable column passes through the movable cavity and is fixed with a bottom plate fixed to the flexible sealing body, and an end of the movable column away from the flexible sealing body is fixed with a top plate, the top plate is located above the connection between the connecting hole and the movable cavity, a compression spring is fixed between the inner wall of the movable cavity and the top plate, and the inner wall of the movable cavity and the top plate are elastically connected by the compression spring;

[0022] The sealing ring is fixedly embedded in the inner side of the installation cylinder. When the inner plate is in contact with the inner wall of the installation cylinder, the sealing ring and the inner plate have an interference fit.

[0023] In summary, by setting up the prompt airbag or prompt rod, when the air pressure in the installed cylinder changes, the pressure change result can be directly known by observing the size of the prompt airbag or the position of the prompt rod, so that the staff can intuitively observe the SF6 gas leakage and carry out timely maintenance;

[0024] In addition, through the provision of a flexible sealing body, an internal pressure ring bag or a sealing ring, the connection between the prompt member and the installed cylinder always maintains a good sealing effect, thereby ensuring that the prompt given by the prompt member is more accurate, reducing the risk of leakage at the installation point of the prompt member, and making the shell structure more stable and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall structure of the first embodiment of this application;

[0026] Figure 2 This is a schematic diagram of the structure of the additional cylinder according to the first embodiment of the present application;

[0027] Figure 3 This is a cross-sectional view of the additional cylinder according to the first embodiment of the present application;

[0028] Figure 4 for Figure 3 A magnified view of the structure at center A;

[0029] Figure 5 This is a partial enlarged cross-sectional view of the first embodiment of the present application showing deformation of the airbag;

[0030] Figure 6 This is a cross-sectional view of the additional cylinder according to the second embodiment of the present application;

[0031] Figure 7 This is a cross-sectional view of the prompt rod when it is retracted according to the second embodiment of the present application.

[0032] Description of the numbers in the figure:

[0033] 1. Upper insulating shell; 2. Lower insulating shell; 3. Additional cylinder; 31. Through hole; 32. Embedded groove; 33. Connecting hole; 34. Movable cavity; 341. Sealing inner flange; 35. Accommodating groove; 4. Prompt airbag; 5. Flexible pressure-bearing body; 6. Movable column; 61. Top plate; 62. Bottom plate; 7. Compression spring; 8. Flexible sealing body; 9. Inner pressure ring bag; 10. Prompt rod; 101. Outer plate; 102. Inner plate; 11. Sealing ring. DETAILED DESCRIPTION

[0034] The following describes two implementation methods of the present application in detail with reference to the accompanying drawings.

[0035] The first implementation method:

[0036] Figure 1-5 The figure shows a GIS high-voltage switch housing structure with a monitoring function, comprising an upper insulating housing 1 and a lower insulating housing 2. The upper and lower insulating housings 1 and 2 are fixed and sealed together by an additional cylinder 3. A through hole 31 is formed on the periphery of the additional cylinder 3, and a prompt member is installed at the through hole 31. The prompt member reflects the pressure change in the additional cylinder 3 by deformation or expansion.

[0037] A sealing structure for sealing the prompting member is also installed on the mounting cylinder 3, and the sealing structure is used to keep the prompting member sealed after deformation or expansion.

[0038] In the above-mentioned GIS high-voltage switch housing structure with a monitoring function, the provision of a prompt member allows the prompt member to directly reflect the pressure change when the air pressure in the additional cylinder 3 (i.e., the air pressure in the upper insulating housing 1 and the lower insulating housing 2) changes, thereby enabling staff to intuitively observe SF6 gas leakage and perform timely maintenance.

[0039] In addition, through the setting of the sealing structure, the connection between the prompt member and the installation cylinder 3 always maintains a good sealing effect, thereby ensuring that the prompt given by the prompt member is more accurate, reducing the risk of leakage at the installation point of the prompt member, and making the shell structure more stable and reliable.

[0040] Furthermore, the prompting member includes a prompting airbag 4 , which is an annular airbag. A fixed cover of the prompting airbag 4 is arranged outside the through hole 31 , the prompting airbag 4 is fixed to the outer wall of the mounting cylinder 3 , and the prompting airbag 4 is communicated with the through hole 31 .

[0041] When there is no leakage of SF6 gas in the additional cylinder 3, the air pressure in the additional cylinder 3 is greater than the external air pressure, thereby inflating the warning airbag 4. When there is leakage of SF6 gas in the additional cylinder 3 (i.e., in the upper insulating shell 1 and the lower insulating shell 2), the air pressure in the additional cylinder 3 decreases, thereby shrinking the warning airbag 4. The staff can directly know whether the SF6 gas in the additional cylinder 3 is leaking by observing the size of the warning airbag 4, so as to perform maintenance according to the actual situation, and the judgment is more convenient and quick.

[0042] Furthermore, a receiving groove 35 (annular groove) is provided on the side wall of the mounting cylinder 3 that is in contact with the prompt airbag 4. The sealing structure includes a flexible sealing body 8 (annular body) that is movably embedded in the receiving groove 35.

[0043] A driving mechanism is also installed in the installation cylinder 3, and the driving mechanism drives the flexible sealing body 8 to move as the air pressure in the installation cylinder 3 changes;

[0044] The sealing structure also includes an inner pressure ring capsule 9, which is a closed capsule. The inner pressure ring capsule 9 is fixed to the outer wall of the mounting cylinder 3, and the inner pressure ring capsule 9 presses the connection between the prompt airbag 4 and the mounting cylinder 3.

[0045] By setting the flexible sealing body 8 and the internal pressure ring bag 9, the connection between the prompt airbag 4 and the additional cylinder 3 can be sealed before and after the prompt airbag 4 is deformed, thereby ensuring good sealing of the connection between the prompt airbag 4 and the additional cylinder 3, reducing the possibility of leakage at this point, and thus ensuring the accuracy of the prompt of the prompt airbag 4.

[0046] Furthermore, an embedding groove 32 (an annular groove) is formed on the inner side of the mounting cylinder 3. An active cavity 34 with a sealing inner flange 341 formed at the lower end is also formed in the mounting cylinder 3. A connecting hole 33 is formed between the active cavity 34 and the embedding groove 32.

[0047] The driving mechanism includes a flexible pressure-bearing body 5 (herein a ring body), a movable column 6, and a compression spring 7. The flexible pressure-bearing body 5 is fixedly embedded in the opening of the embedding groove 32 and closes the embedding groove 32. The flexible pressure-bearing body 5 deforms as the air pressure in the mounting cylinder 3 changes. The deformation of the flexible pressure-bearing body 5 includes concaving into the embedding groove 32 or convexing into the mounting cylinder 3.

[0048] The movable column 6 is slidably installed in the movable cavity 34. One end of the movable column 6 passes through the movable cavity 34 and is fixed with a bottom plate 62 fixed to the flexible sealing body 8. The end of the movable column 6 away from the flexible sealing body 8 is fixed with a top plate 61. The top plate 61 is located above the connection between the connecting hole 33 and the movable cavity 34. The upper and lower ends of the compression spring 7 are respectively fixed to the top of the movable cavity 34 and the top plate 61.

[0049] When the air pressure in the mounting cylinder 3 is normal, the SF6 gas compresses the flexible pressure-bearing body 5, causing it to deform concavely into the embedded groove 32. As a result, the gas in the embedded groove 32 is forced to move into the movable chamber 34 and lift the top plate 61 located in the movable chamber 34. As a result, the movable column 6 overcomes the pressure of the compression spring 7 and separates the flexible sealing body 8 from the warning airbag 4 (at this time, the internal pressure ring bag 9 is compressed and presses the connection between the inner side of the warning airbag 4 and the mounting cylinder 3, achieving the effect of strengthening the sealing).

[0050] When the air pressure in the mounting cylinder 3 decreases, the pressure borne by the flexible pressure-bearing body 5 decreases, causing the flexible pressure-bearing body 5 to reset and produce a convex deformation toward the mounting cylinder 3, thereby pressurizing the gas in the embedding groove 32. The top plate 61 descends under the elastic force of the compression spring 7, so that the movable column 6 drives the flexible sealing body 8 to press against the outside of the connection between the prompt airbag 4 and the mounting cylinder 3, thereby achieving the effect of enhancing the sealing.

[0051] Second implementation method:

[0052] Figure 6-7 Shown, another prompt piece and sealing structure:

[0053] The prompt member includes a prompt rod 10, which slides through the through hole 31. An inner plate 102 is fixed to one end of the prompt rod 10 located inside the mounting cylinder 3, and an outer plate 101 is fixed to one end of the prompt rod 10 located outside the mounting cylinder 3. Both the outer plate 101 and the inner plate 102 are attached to and adapted to the side wall of the mounting cylinder 3.

[0054] By setting the prompt rod 10, the staff can know whether the gas inside the additional cylinder 3 is leaking by observing whether there is a gap or the size of the gap between the outer plate 101 and the outer wall of the additional cylinder 3. That is, the lower the air pressure inside the additional cylinder 3 (SF6 gas leakage), the smaller the distance between the outer plate 101 and the additional cylinder 3 (or the distance is close to each other without any distance). Specifically, when the air pressure inside the additional cylinder 3 is normal, the distance between the outer plate 101 and the additional cylinder 3 is the largest. In this way, it can also be judged whether the SF6 gas in the additional cylinder 3 is leaking. The size of the distance is more obvious than the size of the airbag (the prompt airbag 4 in the first embodiment), and can also show the degree of leakage to a certain extent, which is more conducive to the staff to make accurate judgments.

[0055] The sealing structure includes a flexible sealing body 8 and a sealing ring 11. The side walls of the mounting cylinder 3 that are in contact with the upper and lower ends of the outer plate 101 are provided with a receiving groove 35 (this is an arc-shaped groove). The flexible sealing body 8 (this is an arc-shaped strip) is movably embedded in the receiving groove 35.

[0056] The inner side of the mounting cylinder 3 is provided with an embedding groove 32 (this is a circular groove) and a movable cavity 34. A connecting hole 33 is provided between the movable cavity 34 and the embedding groove 32. The lower end of the movable cavity 34 is integrally formed with a sealing inner flange 341 that separates the movable cavity 34 from the receiving groove 35.

[0057] A flexible pressure-bearing body 5 (a disc) is fixedly embedded in the opening of the embedding groove 32 to close the embedding groove 32. The flexible pressure-bearing body 5 deforms as the air pressure in the mounting cylinder 3 changes. The deformation of the flexible pressure-bearing body 5 includes concave deformation into the embedding groove 32 and convex deformation into the mounting cylinder 3.

[0058] A movable column 6 is slidably installed in the movable cavity 34. One end of the movable column 6 passes through the movable cavity 34 and is fixed with a bottom plate 62 fixed to the flexible sealing body 8. The end of the movable column 6 away from the flexible sealing body 8 is fixed with a top plate 61. The top plate 61 is located above the connection between the connecting hole 33 and the movable cavity 34. A compression spring 7 is fixed between the inner wall of the movable cavity 34 and the top plate 61. The inner wall of the movable cavity 34 and the top plate 61 are elastically connected by the compression spring 7.

[0059] The sealing ring 11 is fixedly embedded in the inner side of the mounting cylinder 3. When the inner plate 102 is in contact with the inner wall of the mounting cylinder 3, the sealing ring 11 and the inner plate 102 have an interference fit.

[0060] By setting the flexible sealing body 8 and the sealing ring 11, the outer plate 101 and the inner plate 102 can be sealed at the joints with the installation cylinder 3 before and after the prompt rod 10 moves, thereby reducing the probability of SF6 gas leakage from this place and ensuring the reliability of the structure.

[0061] It should be further explained that the prompt airbag 4, flexible sealing body 8, flexible pressure-bearing body 5, internal pressure ring bag 9 and sealing ring 11 involved in this application are all made of insulating (elastically deformable) flexible materials, such as rubber, silicone or polyolefin elastic insulating materials, etc., and the materials used are preferably those that do not react with SF6 gas.

[0062] In view of current actual needs, the protection scope of the above-mentioned implementation mode adopted in this application is not limited to this. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the protection scope of the present invention.

Claims

1. A GIS high-voltage switch housing structure with a monitoring function, comprising an upper insulating housing (1) and a lower insulating housing (2), characterized in that: The upper insulating shell (1) and the lower insulating shell (2) are fixed and sealed in communication via an additional cylinder (3); a through hole (31) is provided on the circumference of the additional cylinder (3); a prompting member is installed at the through hole (31); the prompting member reflects the change in air pressure in the additional cylinder (3) by deformation or expansion; The mounting cylinder (3) is also provided with a sealing structure for sealing the prompting member, and the sealing structure is used to keep the prompting member sealed after deformation or expansion; A driving mechanism is also installed in the installation cylinder (3), and the driving mechanism drives the sealing structure to move as the air pressure in the installation cylinder (3) changes; An embedding groove (32) is provided on the inner side of the mounting cylinder (3), and an active cavity (34) with a sealing inner flange (341) formed at the lower end is also provided in the mounting cylinder (3), and a connecting hole (33) is provided between the active cavity (34) and the embedding groove (32). The driving mechanism includes a flexible pressure-bearing body (5), a movable column (6) and a compression spring (7); the flexible pressure-bearing body (5) is fixedly embedded in the opening of the embedding groove (32) and closes the embedding groove (32); the flexible pressure-bearing body (5) deforms as the air pressure in the mounting cylinder (3) changes; the deformation of the flexible pressure-bearing body (5) includes a concave deformation into the embedding groove (32) or a convex deformation into the mounting cylinder (3); The movable column (6) is slidably installed in the movable cavity (34), one end of the movable column (6) passes through the movable cavity (34) and is fixed with a bottom plate (62) fixed to the sealing structure, and the end of the movable column (6) away from the bottom plate (62) is fixed with a top plate (61), and the top plate (61) is located above the connection point between the connecting hole (33) and the movable cavity (34), and the upper and lower ends of the compression spring (7) are respectively fixed to the top of the movable cavity (34) and the top plate (61).

2. The GIS high-voltage switch housing structure with a monitoring function according to claim 1, characterized in that: The prompting member comprises a prompting airbag (4), a fixed cover of the prompting airbag (4) is arranged outside the through hole (31), the prompting airbag (4) is fixed to the outer side wall of the mounting cylinder (3), and the prompting airbag (4) is communicated with the through hole (31).

3. The GIS high-voltage switch housing structure with a monitoring function according to claim 2, characterized in that: A receiving groove (35) is provided on the side wall of the mounting cylinder (3) that is in contact with the prompt airbag (4). The sealing structure includes a flexible sealing body (8) that is movably embedded in the receiving groove (35).

4. The GIS high-voltage switch housing structure with a monitoring function according to claim 3 is characterized in that: The top of the flexible sealing body (8) is fixed to the bottom of the base plate (62).

5. The GIS high-voltage switch housing structure with a monitoring function according to claim 1 is characterized in that: The sealing structure further comprises an inner pressure ring sac (9), which is a closed sac. The inner pressure ring sac (9) is fixed to the outer wall of the mounting cylinder (3), and the inner pressure ring sac (9) presses the connection between the prompt airbag (4) and the mounting cylinder (3).

6. The GIS high-voltage switch housing structure with a monitoring function according to claim 1, characterized in that: The prompt member comprises a prompt rod (10), the prompt rod (10) slides through the through hole (31), an inner plate (102) is fixed to one end of the prompt rod (10) located inside the mounting cylinder (3), and an outer plate (101) is fixed to one end of the prompt rod (10) located outside the mounting cylinder (3), and both the outer plate (101) and the inner plate (102) are attached to and adapted to the side wall of the mounting cylinder (3).

7. The GIS high-voltage switch housing structure with monitoring function according to claim 6, characterized in that: The sealing structure comprises a flexible sealing body (8) and a sealing ring (11); a side wall of the mounting cylinder (3) that is in contact with the upper and lower ends of the outer plate (101) is provided with an accommodating groove (35); the lower end of the movable cavity (34) is communicated with the accommodating groove (35); and the flexible sealing body (8) is movably embedded in the accommodating groove (35).

8. The GIS high-voltage switch housing structure with monitoring function according to claim 7, characterized in that: The sealing ring (11) is fixedly embedded in the inner side of the mounting cylinder (3); when the inner plate (102) is in contact with the inner wall of the mounting cylinder (3), the sealing ring (11) and the inner plate (102) are interference-fitted.

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