Lightning arrester installation auxiliary tool for portable gas insulated switchgear

Abstract

The utility model discloses a portable auxiliary tool for installing a lightning arrester for a gas-insulated switchgear, which comprises an inner cone socket, one end of the inner cone socket, which is positioned in a plugging hole, is connected with a gas box bottom plate, the other side of the gas box bottom plate is connected with a base flange, and the other end of the base flange is connected with a limiting flange through three guide screw rods; the device further comprises a lightning arrester, the lightning arrester penetrates through the limiting flange, the base flange and the gas tank bottom plate to be inserted into the inner cone socket, an exhaust strip is further inserted into the inner cone socket, and the free end of the exhaust strip penetrates through the gas tank bottom plate, the base flange and the limiting flange. The lightning arrester installation auxiliary tool for the portable gas-insulated switchgear provided by the utility model solves the problem that the lightning arrester and a cable head are not easy to plug and fix when field equipment of the gas-insulated switchgear is installed.

Description

Technical Field

[0001] The utility model belongs to the technical field of arrester installation, and particularly relates to an auxiliary tool for installing an arrester for a portable gas-insulated switchgear (GIS). Background Art

[0002] A gas-insulated switchgear is a new generation of switchgear. The main switch can be a vacuum circuit breaker with a permanent magnet mechanism or a vacuum circuit breaker with a spring mechanism. The whole cabinet combines air insulation and sulfur hexafluoride gas compartments, which is both compact and expandable, and is suitable for distribution automation. An arrester is one of the important components of a gas-insulated switchgear, which can protect the gas-insulated switchgear from the harm of high transient overvoltages during lightning strikes. In the existing gas-insulated switchgear, a cable connector, a mutual inductor and an arrester are installed in the gas tank of the cabinet. The cable connector is installed on the lower side of the gas tank of the cabinet. The arrester is usually directly inserted into an inner cone socket, which can effectively prevent the switchgear from malfunctioning under abnormal voltage conditions.

[0003] When replacing the arrester of the existing gas-insulated switchgear, it entirely depends on the staff to manually replace it. The staff needs to hold the arrester by hand for replacement, which is time-consuming and laborious. Moreover, under the condition of a narrow installation space at the gas-insulated switchgear site, when a single person lies on the side to install the arrester and the cable head, it is necessary to hold the product by hand for a long time. At the same time, when the staff holds the product with one hand and installs the bolt, it is easy to be skewed, resulting in the fixing bolt being inserted obliquely and unable to be screwed in, and even causing the installation thread hole of the inner cone socket to crack, resulting in air leakage at the equipment site and affecting the construction period and other adverse phenomena. Summary of the Utility Model

[0004] The purpose of the utility model is to provide an auxiliary tool for installing an arrester for a portable gas-insulated switchgear, which solves the problem that it is not easy to insert and fix the arrester and the cable head during the installation of on-site equipment of the existing gas-insulated switchgear.

[0005] The technical solution adopted by the utility model is that the auxiliary tool for installing an arrester for a portable gas-insulated switchgear includes an inner cone socket. One end of the inner cone socket located at the insertion hole is connected with a gas tank bottom plate, and the other side of the gas tank bottom plate is connected with a base flange. One end of the base flange away from the gas tank bottom plate is commonly connected with a limit flange through three guide screws;

[0006] It further includes an arrester. The arrester respectively penetrates through the limit flange, the base flange and the gas tank bottom plate and is inserted into the inner cone socket. An exhaust strip is also inserted into the inner cone socket, and the free ends of the exhaust strip respectively penetrate through the gas tank bottom plate, the base flange and the limit flange.

[0007] The characteristics of the utility model also lie in that:

[0008] Three fixing bolts are arranged on the gas tank bottom plate, and the base flange is fixed on the gas tank bottom plate through three fixing bolts and matching wing nuts.

[0009] The base flange is evenly divided into three first arc-shaped flange blocks. The three first arc-shaped flange blocks are connected end to end to form an annular base flange, and each two adjacent first arc-shaped flange blocks are connected by a cylindrical pin.

[0010] The three guide screws are respectively perpendicular to the limit flange and the base flange, and the guide screws are equidistantly arranged along the circumferential direction of the base flange.

[0011] The limit flange is evenly divided into three second arc-shaped flange blocks. Each second arc-shaped flange block is provided with a round hole matching with the guide screw. The guide screw slides through the corresponding round hole. A limit nut is screwed on each guide screw, and the limit nut contacts the corresponding second arc-shaped flange block. The three second arc-shaped flange blocks are connected end to end to form an annular limit flange, and the free end of each second arc-shaped flange block is movably clamped on the adjacent guide screw.

[0012] The inner diameter of the limit flange is equal to the outer diameter of the arrester installation surface.

[0013] One of the second arc-shaped flange blocks is provided with a square hole, a rubber sleeve is arranged in the square hole, and the exhaust strip penetrates through the rubber sleeve.

[0014] The beneficial effects of the utility model are as follows:

[0015] (1) The arrester installation auxiliary tool for the portable gas-insulated switchgear of the utility model realizes that when installing the arrester and the cable head alone in a lying position under the condition of a narrow on-site installation space of the gas-insulated switchgear, it is not necessary to hold the product with hands for a long time. At the same time, with the assistance of the guide screw, the direction is perpendicular when the arrester is inserted into the cone, avoiding the phenomenon that the fixing bolt is skew when a person holds the product with one hand to install the bolt, and even the installation thread hole of the inner cone socket is cracked, resulting in air leakage at the equipment site and affecting the construction period.

[0016] (2) The arrester installation auxiliary tool for the portable gas-insulated switchgear of the utility model can clamp the arrester through simple operation by splitting the limit flange into three equal parts, and then rotate the fixing nut to slowly move the arrester to the installable position, improving the working efficiency and reliability of installing the arrester and the cable joint at the on-site of the gas-insulated switchgear equipment. The structure is simple, light and easy to carry, easy to operate and has strong practicability. Description of the Drawings

[0017] Figure 1 is a schematic structural diagram of the installation state of the arrester installation auxiliary tool of the utility model;

[0018] Figure 2 is a schematic overall structural diagram of the arrester installation auxiliary tool of the utility model when in use;

[0019] Figure 3 is a schematic structural diagram of the cylindrical pin of the arrester installation auxiliary tool of the utility model.

[0020] In the figure, 1. Air box bottom plate, 2. Inner cone socket, 3. Base flange, 4. Wing nut, 5. Limit flange, 6. Guide screw, 7. Lightning arrester, 8. Exhaust strip, 9. Cylindrical pin, 10. Rubber sleeve. Specific implementation manner

[0021] The present utility model will be described in detail below in conjunction with the accompanying drawings and specific implementation manners.

[0022] An auxiliary tool for installing a lightning arrester for a portable gas-insulated switchgear, as Figure 1 , 2 shown, includes an inner cone socket 2. One end of the inner cone socket 2 located in the insertion hole is connected with an air box bottom plate 1, and the other side of the air box bottom plate 1 is connected with a base flange 3. The specific connection method is: three fixing bolts are provided on the air box bottom plate 1, and the base flange 3 is fixed on the air box bottom plate 1 through the three fixing bolts and the matching wing nuts 4. During use, the auxiliary tool can be quickly disassembled by rotating the wing nut 4.

[0023] Furthermore, as Figure 3 shown, the base flange 3 is evenly divided into three first arc flange blocks. Among them, each first arc flange block is fixed on the air box bottom plate 1 through a fixing bolt and the matching wing nut 4. The three first arc flange blocks are connected end to end to form an annular base flange 3. Each two adjacent first arc flange blocks are connected through a cylindrical pin 9. The purpose of dividing it into three parts is to facilitate disassembly when installing the cable head.

[0024] One end of the base flange 3 away from the air box bottom plate 1 is commonly connected with a limit flange 5 through three guide screws 6. Among them, the three guide screws 6 are respectively perpendicular to the limit flange 5 and the base flange 3, and the guide screws 6 are equidistantly arranged along the circumferential direction of the base flange 3.

[0025] Furthermore, the limit flange 5 is evenly divided into three second arc flange blocks. Each second arc flange block is provided with a round hole matching with the corresponding guide screw 6. The guide screw 6 slidably penetrates through the corresponding round hole. A limit nut is screwed on each guide screw 6, and the limit nut contacts the corresponding second arc flange block. The three second arc flange blocks are connected end to end to form an annular limit flange 5. The free end of each second arc flange block is movably clamped on the adjacent guide screw 6. During use, the limit flange 5 can be pushed to move upward by synchronously rotating the limit nuts.

[0026] It further includes a lightning arrester 7. The lightning arrester 7 penetrates through the limit flange 5, the base flange 3 and the air box bottom plate 1 respectively and is inserted into the inner conical socket 2. Among them, the inner diameter of the limit flange 5 is equal to the outer diameter of the installation surface of the lightning arrester 7. After the three second arc flange blocks are connected end to end to form a complete limit flange 5, the limit flange 5 can clamp the lightning arrester 7. Specifically, when in use, it clamps the installation surface of the lightning arrester 7, and then the lightning arrester 7 can be adjusted up and down along with the limit flange 5.

[0027] An exhaust strip 8 is also inserted into the inner conical socket 2. The free ends of the exhaust strip 8 penetrate through the air box bottom plate 1, the base flange 3 and the limit flange 5 respectively. A square hole is opened on one of the second arc flange blocks, and a rubber sleeve 10 is arranged in the square hole. The exhaust strip 8 penetrates through the rubber sleeve 10 to prevent the exhaust strip 8 from falling off. During the upward installation process of the lightning arrester 7, the air pressure inside the inner conical socket 2 between the lightning arrester 7 and the inner conical socket 2 will increase due to the decrease in space. Therefore, the excess gas can be discharged through the exhaust strip 8.

[0028] Working principle: First, install the portable installation auxiliary tool on the air box bottom plate 1 through the fixing bolts and wing nuts 4 at the bottom of the air box bottom plate 1. The state after fixed installation is as Figure 1 shown. At this time, the limit flange 5 is in an open and free state. Insert the exhaust strip 8 into the insertion hole of the inner conical socket 2, and then lift the lightning arrester 7 upward and insert it into the insertion hole of the inner conical socket 2, so that the lower edge of the installation surface of the lightning arrester 7 is flush with the upper surface of the limit flange 5. At this time, close the three second arc flange blocks so that they are connected end to end to form a complete circular ring to clamp the lightning arrester 7. The state is as Figure 2 shown. At this time, the limit nut on the guiding screw 6 can be rotated synchronously to realize the slow upward movement of the limit flange 5 driving the lightning arrester 7. Among them, several connection bolts are provided on the lightning arrester 7 element itself, and corresponding threaded holes are provided in the insertion hole of the inner conical socket 2. When the position of the lightning arrester 7 moves to the position where the connection bolts on the lightning arrester 7 can be screwed into the threaded holes, screw the connection bolts on the lightning arrester 7 into the threaded holes, pull out the exhaust strip 8, and at the same time open the three second arc flange blocks to make them return to the open and free state, and rotate the wing nut 4 to remove the auxiliary tool.

[0029] Embodiment 1

[0030] The lightning arrester installation auxiliary tool for a portable gas-insulated switchgear, as Figure 1 、 2 shown, includes an inner conical socket 2. One end of the inner conical socket 2 located at the insertion hole is connected with an air box bottom plate 1, and the other side of the air box bottom plate 1 is connected with a base flange 3. The specific connection method is: three fixing bolts are provided on the air box bottom plate 1, and the base flange 3 is fixed on the air box bottom plate 1 through the three fixing bolts and the matching wing nuts 4. During use, the auxiliary tool can be quickly disassembled by rotating the wing nut 4.

[0031] Further, as Figure 3 As shown in the figure, the base flange 3 is evenly divided into three first arc-shaped flange blocks. The three first arc-shaped flange blocks are connected end to end to form a circular base flange 3. Each two adjacent first arc-shaped flange blocks are connected by a cylindrical pin 9. The purpose of dividing it into three parts is to facilitate disassembly when installing the cable head.

[0032] One end of the base flange 3 far from the air tank bottom plate 1 is commonly connected with a limit flange 5 through three guiding screws 6. Among them, the three guiding screws 6 are respectively perpendicular to the limit flange 5 and the base flange 3, and the guiding screws 6 are arranged equidistantly along the circumferential direction of the base flange 3.

[0033] It further includes a lightning arrester 7. The lightning arrester 7 respectively penetrates through the limit flange 5, the base flange 3 and the air tank bottom plate 1 and is inserted into the inner conical socket 2. Among them, the inner diameter of the limit flange 5 is equal to the outer diameter of the installation surface of the lightning arrester 7. After connecting the three second arc-shaped flange blocks end to end to form a complete limit flange 5, the limit flange 5 can clamp the lightning arrester 7. Specifically, when in use, it clamps the installation surface of the lightning arrester 7, and then the lightning arrester 7 can be adjusted up and down along with the limit flange 5.

[0034] An exhaust strip 8 is also inserted into the inner conical socket 2. The free ends of the exhaust strip 8 respectively penetrate through the air tank bottom plate 1, the base flange 3 and the limit flange 5.

[0035] Embodiment 2

[0036] An auxiliary tool for installing a lightning arrester for a portable gas-insulated switchgear, as Figure 1 、 2 shown, includes an inner conical socket 2. One end of the inner conical socket 2 located at the insertion hole is connected with an air tank bottom plate 1, and the other side of the air tank bottom plate 1 is connected with a base flange 3. The specific connection method is as follows: There are three fixing bolts on the air tank bottom plate 1, and the base flange 3 is fixed on the air tank bottom plate 1 through three fixing bolts and matching wing nuts 4. When in use, the auxiliary tool can be quickly disassembled by rotating the wing nut 4.

[0037] One end of the base flange 3 far from the air tank bottom plate 1 is commonly connected with a limit flange 5 through three guiding screws 6.

[0038] Furthermore, the limit flange 5 is evenly divided into three second arc-shaped flange blocks. Each second arc-shaped flange block is provided with a round hole matching the guiding screw 6. The guiding screw 6 slidably penetrates through the corresponding round hole. A limit nut is screwed on each guiding screw 6, and the limit nut contacts the corresponding second arc-shaped flange block. The three second arc-shaped flange blocks are connected end to end to form a circular limit flange 5. The free end of each second arc-shaped flange block is movably clamped on the adjacent guiding screw 6. When in use, the limit flange 5 can be pushed to move upward by synchronously rotating the limit nuts.

[0039] It further includes a lightning arrester 7, and the lightning arrester 7 penetrates through the limit flange 5, the base flange 3 and the air box bottom plate 1 respectively and is inserted into the inner conical socket 2.

[0040] An exhaust strip 8 is also inserted into the inner conical socket 2. The free ends of the exhaust strip 8 penetrate through the air box bottom plate 1, the base flange 3 and the limit flange 5 respectively. A square hole is formed in one of the second arc-shaped flange blocks, and a rubber sleeve 10 is arranged in the square hole. The exhaust strip 8 penetrates through the rubber sleeve 10 to prevent the exhaust strip 8 from falling off. During the upward installation process of the lightning arrester 7, the air pressure in the inner conical socket 2 and the lightning arrester 7 will increase due to the reduction of the space. Therefore, the excess gas can be discharged through the exhaust strip 8.

[0041] Embodiment 3

[0042] Working principle: First, install the portable installation auxiliary tool on the air box bottom plate 1 through the fixing bolts and wing nuts 4 at the bottom of the air box bottom plate 1. The state after fixed installation is as Figure 1 shown. At this time, the limit flange 5 is in an open and free state. Insert the exhaust strip 8 into the insertion hole of the inner conical socket 2, and then lift the lightning arrester 7 upward and insert it into the insertion hole of the inner conical socket 2, so that the lower edge of the installation surface of the lightning arrester 7 is flush with the upper surface of the limit flange 5. At this time, close the three second arc-shaped flange blocks so that they are connected end to end to form a complete circular ring to clamp the lightning arrester 7. The state is as Figure 2 shown. At this time, the limit nut on the guiding screw 6 can be rotated synchronously to realize the slow upward movement of the limit flange 5 driving the lightning arrester 7. The lightning arrester 7 element itself is provided with a plurality of connecting bolts, and corresponding threaded holes are arranged in the insertion hole of the inner conical socket 2. When the position of the lightning arrester 7 moves to the position where the connecting bolts on the lightning arrester 7 can be screwed into the threaded holes, screw the connecting bolts on the lightning arrester 7 into the threaded holes, pull out the exhaust strip 8, and at the same time open the three second arc-shaped flange blocks to make them return to the open and free state, and rotate the wing nut 4 to remove the auxiliary tool.

Claims

1. An auxiliary tool for installing a lightning arrester for a portable inflatable cabinet, characterized in that, It includes an inner conical socket (2). One end of the inner conical socket (2) located in the insertion hole is connected with an air box bottom plate (1). The other side of the air box bottom plate (1) is connected with a base flange (3). One end of the base flange (3) far from the air box bottom plate (1) is commonly connected with a limit flange (5) through three guiding screws (6). It further includes a lightning arrester (7). The lightning arrester (7) respectively penetrates through the limit flange (5), the base flange (3) and the air box bottom plate (1) and is inserted into the inner conical socket (2). An exhaust strip (8) is also inserted into the inner conical socket (2). The free ends of the exhaust strip (8) respectively penetrate through the air box bottom plate (1), the base flange (3) and the limit flange (5).

2. The lightning arrester installation auxiliary tool for a portable inflatable cabinet according to claim 1, characterized in that, Three fixing bolts are provided on the air box bottom plate (1). The base flange (3) is fixed on the air box bottom plate (1) through three fixing bolts and corresponding wing nuts (4).

3. The lightning arrester installation auxiliary tool for a portable inflatable cabinet according to claim 1, characterized in that, The base flange (3) is evenly divided into three first arc flange blocks. The three first arc flange blocks are connected end to end to form a circular base flange (3). Each two adjacent first arc flange blocks are connected through a cylindrical pin (9).

4. The lightning arrester installation auxiliary tool for a portable inflatable cabinet according to claim 1, characterized in that, The three guiding screws (6) are respectively perpendicular to the limit flange (5) and the base flange (3). The guiding screws (6) are arranged equidistantly along the circumferential direction of the base flange (3).

5. The lightning arrester installation auxiliary tool for a portable inflatable cabinet according to claim 1, wherein The limit flange (5) is evenly divided into three second arc flange blocks. A round hole matched with the guiding screw (6) is opened on each second arc flange block. The guiding screw (6) slidably penetrates through the corresponding round hole. A limit nut is screwed on each guiding screw (6). The limit nut contacts with the corresponding second arc flange block. The three second arc flange blocks are connected end to end to form a circular limit flange (5). The free end of each second arc flange block is movably clamped on the adjacent guiding screw (6).

6. The lightning arrester installation auxiliary tool for a portable inflatable cabinet according to claim 1, wherein The inner diameter of the limit flange (5) is equal to the outer diameter of the installation surface of the lightning arrester (7).

7. The lightning arrester installation auxiliary tool for a portable inflatable cabinet according to claim 5, characterized in that A square hole is opened on one of the second arc flange blocks. A rubber sleeve (10) is arranged in the square hole. The exhaust strip (8) penetrates through the rubber sleeve (10).

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