Sulfur hexafluoride gas filling device

Abstract

The present invention provides a sulfur hexafluoride gas inflation device according to this embodiment, including an inflation body and a fixed sleeve; the front end of the inflation body is connected to the inflation interface, and the rear end thereof is connected to the sulfur hexafluoride gas storage device; the sulfur hexafluoride gas storage device injects sulfur hexafluoride gas into the electrical device through the inflation body; the fixed sleeve is arranged on the outside of the inflation body and slidably cooperates with the inflation body; the length of the inflation body is greater than the fixed sleeve, and the rear end of the inflation body is exposed from the rear end of the fixed sleeve; the front end of the fixed sleeve can be installed on the outside of the inflation interface; the inflation body, the fixed sleeve and the inflation interface are coaxially arranged. When the check valve of the inflation interface fails, the deflation can be discovered in time when the inflation body is withdrawn; under the guidance of the fixed sleeve, the inflation body can be relatively easily reconnected to the inflation interface to prevent the sulfur hexafluoride gas in the electrical device from continuing to leak, thereby curbing the expansion of the fault.

Description

Technical Field

[0001] The invention relates to the technical field of electrical equipment auxiliary tools, and in particular to a sulfur hexafluoride gas charging device. Background Art

[0002] Sulfur hexafluoride gas insulated electrical equipment uses high-voltage (0.45-0.6Mpa) sulfur hexafluoride gas as an insulating and arc-extinguishing medium. When sulfur hexafluoride electrical equipment is put into operation, it is necessary to regularly take out gas for testing or replenish gas due to reduced gas pressure. All these tasks must be performed through the equipment's gas charging valve, and most of the work is performed when the equipment is energized. The gas charging valve part is a self-closing check valve type. When taking out gas or replenishing gas for sulfur hexafluoride electrical equipment, the self-closing check valve becomes stuck and cannot be reset due to impurities, rust or other reasons.

[0003] When taking out or replenishing gas from sulfur hexafluoride gas-insulated electrical equipment, traditional connectors are used for taking out and filling. If the self-closing check valve of the filling interface of the electrical equipment fails, the high gas pressure of 0.45-0.6Mpa leaks out and cannot be blocked with traditional connectors. The gas can only leak out, causing the switch to be locked due to low gas pressure. The power outage requires the shutdown of the upper switch, forcing the entire busbar to be shut down for repair of the faulty switch, thereby expanding the scope of the power outage, affecting the safety and reliability of the power grid operation, and causing the load of other equipment to increase. The increased load will affect the safety of equipment operation, reduce the reliability of the safe operation of the power grid, and cause unnecessary power accidents. In addition, the failure of the self-closing check valve of sulfur hexafluoride gas insulated electrical equipment resulted in the inability to block the leakage of sulfur hexafluoride gas, and the sulfur hexafluoride gas was directly discharged into the atmosphere. If it is an indoor GIS room, it will affect the personal safety of the staff (more than 1000PPM of sulfur hexafluoride gas indoors will cause people to lack of oxygen and suffocate). The sulfur hexafluoride gas emitted by outdoor GIS equipment into the air causes environmental pollution (the impact of one molecule of sulfur hexafluoride gas on the greenhouse effect is 25,000 times that of a carbon dioxide molecule, and the lifespan of sulfur hexafluoride gas emitted into the atmosphere is about 3,400 years). Summary of the invention

[0004] In view of the related technical problems, the purpose of the present invention is to provide a sulfur hexafluoride gas inflation device. When the self-sealing check valve of the inflation interface of the electrical equipment fails to seal, the joint can be quickly reinstalled under the condition of high outlet pressure to block the leaking self-sealing valve, so that the faulty switch is still under the rated pressure and waits for power outage processing. It avoids the switch being locked due to low gas pressure caused by the drop in sulfur hexafluoride gas pressure, forcing the entire busbar to shut down for repairing the faulty switch. Through this invention, the scope of power outage can be reduced when the equipment check valve fails.

[0005] The technical solution adopted by the present invention to solve the above technical problems is as follows:

[0006] A sulfur hexafluoride gas inflation device comprises an inflation body and a fixing sleeve; the front end of the inflation body is connected to an inflation interface, and the rear end thereof is connected to a sulfur hexafluoride gas storage device; the fixing sleeve is arranged on the outside of the inflation body and slidably cooperates with the inflation body; the length of the inflation body is greater than that of the fixing sleeve, and the rear end of the inflation body is exposed from the rear end of the fixing sleeve; the front end of the fixing sleeve can be installed on the outside of the inflation interface.

[0007] As a preferred solution, the inflatable body includes an inflatable joint and an extension rod; the rear end of the inflatable joint and the front end of the extension rod are threadedly connected, and the inner cavity of the inflatable joint and the extension rod are connected.

[0008] Furthermore, an abutment platform is provided near the front end of the inner cavity of the extension rod, a second sealing ring is provided on the abutment platform, and the rear end surface of the inflation joint abuts against the second sealing ring.

[0009] As a preferred solution, the fixing sleeve comprises a locking nut, a guide nut and a nut fixing piece; two ends of the nut fixing piece are rotatably connected to the locking nut and the guide nut respectively;

[0010] The inflatable joint is inserted into the inner cavity of the locking nut, and the inflatable joint can slide and rotate along the axis in the inner cavity of the locking nut;

[0011] The extension rod passes through the guide nut and is threadably matched with the guide nut.

[0012] Furthermore, the inflation connector also includes a flange, and the flange and the inner cavity of the locking nut are transitionally matched.

[0013] As a preferred solution, a limit platform is provided in the inner cavity of the locking nut, the limit platform is flush with the rear end surface of the locking nut, and the limit platform is used to abut the flange.

[0014] As a preferred solution, the locking nut includes a third operating part and a third connecting part which are arranged in sequence from the front end to the rear end; the third operating part is threadedly connected to the inflation interface, and the third connecting part is rotationally connected to the nut fixing piece.

[0015] As a preferred solution, the locking nut further includes an observation portion, and the observation portion is located between the third operating portion and the third connecting portion; the observation portion is provided with a through groove.

[0016] As a preferred solution, the nut fixing member includes a pair of clamping blocks and a locking member, the inner ring side of the clamping block is provided with two circumferentially extending clamping grooves at intervals, the locking nut is provided with a first clamping platform, and the first clamping platform is arranged on one of the clamping grooves; the guide nut is provided with a second clamping platform, and the second clamping platform is arranged on the other of the clamping grooves;

[0017] The two clamping blocks are arranged opposite to each other, and cooperate with the first clamping platform and the second clamping platform respectively through the two clamping grooves, so that the two clamping blocks are jointly sleeved with the locking nut and the guide nut, and the locking member locks and fixes the two clamping blocks.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] When the inflatable device is connected to the inflatable interface, the front end of the fixing sleeve is firstly sleeved on the outside of the inflatable interface and fixed, and then the rear end of the inflatable body is operated to make the front end of the inflatable body connected to the inflatable interface;

[0020] When the inflatable device is withdrawn from the inflatable interface, the rear end of the inflatable body is operated to make the front end of the inflatable body withdraw from the inflatable interface; then the fixing sleeve is removed from the inflatable interface of the electrical equipment;

[0021] In this way, when the check valve of the inflation interface fails, the air leakage can be discovered in time when the inflation body is withdrawn; under the guidance of the fixing sleeve, the inflation body can be reconnected to the inflation interface relatively easily to prevent the sulfur hexafluoride gas in the electrical equipment from continuing to leak, thereby curbing the expansion of the fault. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention 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 present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0023] Figure 1 is a schematic diagram of the inflation device of the present invention;

[0024] Figure 2 is an exploded view of the inflation device of the present invention;

[0025] Figure 3 is a cross-sectional view of the inflation device of the present invention;

[0026] Figure 4 is a schematic diagram of the inflation joint in the present invention;

[0027] Figure 5is a schematic diagram of an extension rod in the present invention;

[0028] Figure 6 is a schematic diagram of a locking nut in the present invention;

[0029] Figure 7 is a schematic diagram of a guide nut in the present invention;

[0030] Figure 8 It is a schematic diagram of a card block in the present invention;

[0031] Description of Figure Numbers:

[0032] 1- Inflatable body;

[0033] 11-inflatable joint; 111-first air receiving portion; 1111-first sealing groove; 112-first operating portion; 113-first connecting portion; 114-flange;

[0034] 12-extension rod; 121-second connecting portion; 122-guiding portion; 123-second operating portion; 124-second air receiving portion; 125-abutting platform;

[0035] 2-Fixed sleeve;

[0036] 21-locking nut; 211-third operating part; 212-third connecting part; 2121-first clamping platform; 213-limiting platform; 214-observation part; 2141-through slot;

[0037] 22-guide nut; 221-fourth connecting portion; 2211-second clamping table; 222-fourth operating portion;

[0038] 23-nut fixing piece; 231-block; 2311-slot; 2312-mounting hole;

[0039] 3-Inflation interface. DETAILED DESCRIPTION

[0040] In order to better understand the purpose, structure, features and effects of the present invention, the present invention is further described in conjunction with the accompanying drawings and specific embodiments. It should be noted that the features shown in the drawings are not necessarily drawn to scale. In addition, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0041] Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood by people with ordinary skills in the field to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right", "front", "back" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly. In addition, in the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0042] like Figure 1-3 As shown, this embodiment provides a sulfur hexafluoride gas inflation device, including an inflation body 1 and a fixing sleeve 2;

[0043] The front end of the inflatable body 1 is connected to the inflatable interface 3 (hereinafter referred to as the inflatable interface 3) of the electrical equipment, and the rear end thereof is connected to the sulfur hexafluoride gas storage device; the sulfur hexafluoride gas storage device injects sulfur hexafluoride gas into the electrical equipment through the inflatable body 1;

[0044] The fixing sleeve 2 is sleeved on the outside of the inflatable body 1 and slidably cooperates with the inflatable body 1; the length of the inflatable body 1 is greater than that of the fixing sleeve 2, and the rear end of the inflatable body 1 is exposed from the rear end of the fixing sleeve 2; the front end of the fixing sleeve 2 can be installed on the outside of the inflatable interface 3; the inflatable body 1, the fixing sleeve 2 and the inflatable interface 3 are coaxially arranged.

[0045] When the inflatable device is connected to the inflatable interface 3, the front end of the fixing sleeve 2 is first sleeved on the outside of the inflatable interface 3 and fixed, and then the rear end of the inflatable body 1 is operated to make the front end of the inflatable body 1 connected to the inflatable interface 3;

[0046] When the inflatable device is withdrawn from the inflatable interface 3, the rear end of the inflatable body 1 is operated first to make the front end of the inflatable body 1 withdraw from the inflatable interface 3; then the fixing sleeve 2 is removed from the inflatable interface 3 of the electrical equipment;

[0047] In this way, when the check valve of the charging interface 3 of the electrical equipment fails, the air leakage can be discovered in time when the charging body 1 is withdrawn; under the guidance of the fixing sleeve 2, the charging body 1 can be reconnected to the charging interface 3 relatively easily to prevent the sulfur hexafluoride gas in the electrical equipment from continuing to leak, thereby curbing the expansion of the fault.

[0048] like Figure 2-3As shown, in this embodiment, the inflatable body 1 includes an inflatable connector 11 and an extension rod 12; the rear end of the inflatable connector 11 is connected to the front end of the extension rod 12, and the inner cavities of the inflatable connector 11 and the extension rod 12 are connected, so as to extend the length of the inflatable body 1, and the inflatable connector 11 is driven to move in the fixed sleeve 2 by operating the extension rod 12, so that the inflatable connector 11 is connected to or exits the inflatable interface 3.

[0049] like Figure 2 , 3 As shown in FIG. 4 , as a preferred solution, the inflation connector 11 includes a first air receiving portion 111, a first operating portion 112 and a first connecting portion 113 which are arranged in sequence from the front end to the rear end;

[0050] The first air connection portion 111 is connected to the air charging interface 3, a first sealing groove 1111 is circumferentially formed on the outer side of the first air connection portion 111, and a first sealing ring is provided on the first sealing groove 1111 to improve the air tightness between the first air connection portion 111 and the air charging interface 3;

[0051] The first operating portion 112 is in the shape of a hexagonal prism, so that the inflation joint 11 can be rotated when the inflation device is assembled;

[0052] The first connecting portion 113 is connected to the extension rod 12 .

[0053] like Figure 2 , 3 As shown in FIG. 5 , as a preferred solution, the extension rod 12 includes a second connecting portion 121, a guide portion 122, a second operating portion 123 and a second air receiving portion 124 which are arranged in sequence from the front end to the rear end;

[0054] The second connection part 121 is sleeved with the first connection part 113, and the second connection part 121 and the first connection part 113 are threadedly connected, which can ensure that the inflation joint 11 and the extension rod 12 are firmly connected;

[0055] The guide portion 122 cooperates with the fixing sleeve 2 to keep the guide portion 122 moving on the axis;

[0056] The second operating portion 123 is in the shape of a hexagonal prism, so as to enable the inflatable device to assemble and operate the extension rod 12 to rotate;

[0057] The second gas connection portion 124 and the sulfur hexafluoride gas storage device are connected by threads, so that when the electrical device is inflated, the inflatable body 1 and the sulfur hexafluoride gas storage device can be firmly connected to the electrical device;

[0058] In addition, the pre-tightening force of the threaded fit between the first connecting part 113 and the second connecting part 121 is greater than the pre-tightening force of the threaded fit between the second gas connecting part 124 and the sulfur hexafluoride gas storage equipment, so that when operating the connection between the second gas connecting part 124 and the sulfur hexafluoride gas storage equipment, the connection between the first connecting part 113 and the second connecting part 121 is not affected.

[0059] like Figure 2 , 3 As shown in FIG. 4 , further, an abutment platform 125 is provided in the inner cavity of the second connecting portion 121 near the rear end, and a second sealing ring is provided on the abutment platform 125. The end face of the first connecting portion 113 abuts against the second sealing ring to improve the air tightness of the connection between the inflation joint 11 and the extension rod 12.

[0060] like Figure 2 , 3 As shown, in this embodiment, the fixing sleeve 2 includes a locking nut 21, a guide nut 22 and a nut fixing piece 23; the two ends of the nut fixing piece 23 are rotatably connected to the locking nut 21 and the guide nut 22 respectively, and the locking nut 21, the guide nut 22 and the nut fixing piece 23 are coaxially arranged, and the inner cavities are connected;

[0061] The inflatable joint 11 is inserted into the inner cavity of the locking nut 21, and the inflatable joint 11 can slide and rotate along the axis in the inner cavity of the locking nut 21;

[0062] The extension rod 12 is penetrated by the guide nut 22, and the second operating portion 123 is exposed from the rear end of the guide nut 22; the guide portion 122 and the guide nut 22 are threadedly matched, and the axial movement of the extension rod 12 is achieved through the relative rotation of the guide nut 22 and the extension rod 12;

[0063] Specifically, after the locking nut 21 is installed on the outside of the electrical equipment, the guide nut 22 is rotated to enable the extension rod 12 to drive the inflation connector 11 to connect to or exit the inflation interface 3; in this way, the stable movement of the inflation connector 11 can be achieved, so that when the gas leaks from the inflation interface 3, the high-pressure gas ejected from the electrical equipment can be easily resisted, so that the inflation connector 11 can be reconnected to the inflation interface 3.

[0064] like Figure 2 , 34, further, the inflation connector 11 also includes a flange 114, and the flange 114 is located between the first air connecting portion 111 and the first operating portion 112, and the flange 114 and the inner cavity of the locking nut 21 are transitionally matched to ensure that the inflation connector 11 moves stably on the axis of the locking nut 21, so that the inflation connector 11 is always aligned with the inflation interface 3.

[0065] like Figure 2 , 3 As shown in FIG. 4 , further, a limit platform 213 is provided in the inner cavity of the locking nut 21, and the limit platform 213 is flush with the rear end surface of the locking nut 21. The limit platform 213 is used to abut the flange 114 to prevent operational errors from causing the inflation connector 11 to be excessively withdrawn and detached from the locking nut 21, causing the axis of the inflation connector 11 to be offset.

[0066] like Figure 2 , 3 As shown in Figure 6, as a preferred solution, the locking nut 21 includes a third operating part 211 and a third connecting part 212 arranged in sequence from the front end to the rear end; the third operating part 211 is threadedly connected to the inflation interface 3, and the third operating part 211 is hexagonal in shape, so that it is easy to operate and install on the inflation interface 3; the third connecting part 212 is rotatably connected to the nut fixing piece 23.

[0067] like Figure 2 , 3 , 6, further, the locking nut 21 also includes an observation portion 214, and the observation portion 214 is located between the third operating portion 211 and the third connecting portion 212; the observation portion 214 is provided with an axially extending through slot 2141, through which the displacement of the inflation connector 11 in the locking nut 21 can be observed to determine whether the inflation connector 11 is connected to or withdrawn from the connector of the electrical equipment. In addition, through the through slot 2141, it is also possible to observe whether the connector of the electrical equipment is leaking.

[0068] like Figure 2 , 3 As shown in Figures 7 and 8, as a preferred solution, the guide nut 22 includes a fourth connecting portion 221 and a fourth operating portion 222 which are arranged in sequence from the front end to the rear end; the fourth connecting portion 221 and the nut fixing member 23 are rotatably connected; the fourth operating portion 222 is in the shape of a hexagonal prism, which is convenient for operating its rotation.

[0069] like Figure 2 , 3As shown in , 8, as a preferred solution, the nut fixing member 23 includes a pair of clamping blocks 231 and a locking member, each of the clamping blocks 231 is semi-cylindrical, and the inner ring side of the clamping block 231 is spaced apart with two circumferentially extending clamping grooves 2311, the third connecting portion 212 is cylindrical, and a first clamping platform 2121 is provided on the outer side thereof, and the first clamping platform 2121 is arranged on one of the clamping grooves 2311; the fourth connecting portion 221 is cylindrical, and a second clamping platform 2211 is provided on the outer side thereof, and the second clamping platform 2211 is arranged on the other of the clamping grooves 2311;

[0070] Specifically, the two clamping blocks 231 are arranged opposite to each other, and the two clamping grooves 2311 respectively cooperate with the first clamping platform 2121 and the second clamping platform 2211, so that the two clamping blocks 231 are jointly sleeved with the locking nut 21 and the guide nut 22, and the two clamping blocks 231 are locked and fixed by the locking piece, so that the locking nut 21 and the guide nut 22 can rotate axially relative to the nut fixing piece 23.

[0071] Preferably, the locking member is a bolt assembly, and mounting holes 2312 are provided on both sides of the clamping block 231. The locking member passes through the mounting holes 2312 to apply a pre-tightening force to the two clamping blocks 231 to lock and fix the two clamping blocks 231.

[0072] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sulfur hexafluoride gas inflation device, characterized in that: The invention comprises an inflatable body (1) and a fixing sleeve (2); the front end of the inflatable body (1) is connected to an inflatable interface (3), and the rear end thereof is connected to a sulfur hexafluoride gas storage device; the fixing sleeve (2) is sleeved on the outside of the inflatable body (1) and slidably cooperates with the inflatable body (1); the length of the inflatable body (1) is greater than that of the fixing sleeve (2), and the rear end of the inflatable body (1) is exposed from the rear end of the fixing sleeve (2); the front end of the fixing sleeve (2) can be installed on the outside of the inflatable interface (3); The inflatable body (1) comprises an inflatable joint (11) and an extension rod (12); the rear end of the inflatable joint (11) and the front end of the extension rod (12) are threadedly connected, and the inner cavities of the inflatable joint (11) and the extension rod (12) are in communication; The fixing sleeve (2) comprises a locking nut (21), a guide nut (22) and a nut fixing piece (23); two ends of the nut fixing piece (23) are rotatably connected to the locking nut (21) and the guide nut (22) respectively; The inflatable joint (11) is inserted into the inner cavity of the locking nut (21), and the inflatable joint (11) can slide and rotate along the axis in the inner cavity of the locking nut (21); The extension rod (12) passes through the guide nut (22) and is threadably matched with the guide nut (22).

2. A sulfur hexafluoride gas inflation device according to claim 1, characterized in that: An abutment platform (125) is provided near the front end of the inner cavity of the extension rod (12), a second sealing ring is provided on the abutment platform (125), and the rear end surface of the inflation joint (11) abuts against the second sealing ring.

3. A sulfur hexafluoride gas inflation device according to claim 1, characterized in that: The inflation connector (11) further comprises a flange (114), and the flange (114) and the inner cavity of the locking nut (21) are transitionally matched.

4. A sulfur hexafluoride gas inflation device according to claim 3, characterized in that: The inner cavity of the locking nut (21) is provided with a limiting platform (213), the limiting platform (213) is flush with the rear end surface of the locking nut (21), and the limiting platform (213) is used to abut against the flange (114).

5. A sulfur hexafluoride gas inflation device according to claim 1, characterized in that: The locking nut (21) comprises a third operating portion (211) and a third connecting portion (212) which are arranged in sequence from the front end to the rear end; the third operating portion (211) is threadedly connected to the inflation interface (3), and the third connecting portion (212) is rotationally connected to the nut fixing member (23).

6. A sulfur hexafluoride gas inflation device according to claim 5, characterized in that: The locking nut (21) further comprises an observation portion (214), wherein the observation portion (214) is located between the third operating portion (211) and the third connecting portion (212); the observation portion (214) is provided with a through slot (2141).

7. A sulfur hexafluoride gas inflation device according to claim 1, characterized in that: The nut fixing member (23) comprises a pair of clamping blocks (231) and a locking member, the inner ring side of the clamping block (231) is provided with two circumferentially extending clamping grooves (2311) at intervals, the locking nut (21) is provided with a first clamping platform (2121), and the first clamping platform (2121) is arranged on one of the clamping grooves (2311); the guide nut (22) is provided with a second clamping platform (2211), and the second clamping platform (2211) is arranged on the other of the clamping grooves (2311); The two clamping blocks (231) are arranged opposite to each other, and cooperate with the first clamping platform (2121) and the second clamping platform (2211) respectively through the two clamping grooves (2311), so that the two clamping blocks (231) are jointly sleeved with the locking nut (21) and the guide nut (22), and the locking member locks and fixes the two clamping blocks (231).

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