Gas-insulated switchgear with multiple sealing functions

Abstract

The utility model belongs to the technical field of gas-filled cabinets, and particularly relates to a gas-filled cabinet with multiple sealing functions, which comprises a gas-filled cabinet body, the gas-filled cabinet body is provided with a sealing door and a cavity, the cavity is provided with a gas leakage groove, the gas-filled cabinet body is provided with a gas delivery pipe, and a first sealing block is fixed in the gas delivery pipe in a sealing manner. A mounting cavity is formed in the first sealing block, an air conveying hole is formed in the first sealing block, an adjusting block is rotationally arranged in the mounting cavity in a sealed mode, a communicating groove is formed outside the adjusting block, a rotating rod is fixed to the adjusting block, a handle is fixed to the rotating rod, a second sealing block is fixed to the cavity, a groove is formed in the second sealing block, a push rod is slidably arranged in the groove, and elastic pieces are arranged in the push rod and the groove. A plugging head is fixed to the push rod, a vent groove is formed in the second sealing block, and the sealing door and the gas-insulated switchgear body are provided with plugging assemblies. Through mutual cooperation between the adjusting block and the first sealing block as well as between the plugging head and the first sealing block and sealing of the plugging assembly, multiple sealing of the gas-insulated switchgear can be realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas-insulated switchgear, and particularly relates to a gas-insulated switchgear with multiple sealing functions. Background Technique

[0002] In some western regions of our country, due to external environmental conditions such as high altitude, condensation, and salt spray that will affect the use of gas-insulated switchgear, in order to avoid the influence of the external environment, gas-insulated switchgear is often used as power distribution equipment.

[0003] In the prior art, by filling insulating gas in the gas-insulated switchgear, the electrical components inside the charging cabinet are avoided from being affected by external factors such as the atmosphere. During the use process, it is found that due to reasons such as equipment aging, the gas filling connection of the gas-insulated switchgear will become loose, resulting in gas leakage and other situations, which will further affect the protection ability of the gas-insulated switchgear for internal electronic components. For this reason, we propose a gas-insulated switchgear with multiple sealing functions to solve the above problems. Content of the Utility Model

[0004] The purpose of the utility model is to provide a gas-insulated switchgear with multiple sealing functions to solve the problems existing in the background technique.

[0005] To achieve the above technical purpose, the technical solution adopted by the utility model is as follows:

[0006] A gas-insulated switchgear with multiple sealing functions includes a gas-insulated switchgear body. The front end of the gas-insulated switchgear body is open, and a sealing door is provided at the front end of the gas-insulated switchgear body. A cavity is opened inside the gas-insulated switchgear body. A leakage groove is opened on the upper wall of the lower side of the cavity. An air delivery pipe is provided at the lower side of the rear end of the gas-insulated switchgear body, and a sealing switch assembly is provided inside the air delivery pipe;

[0007] The sealing switch assembly includes a first sealing block, which is fixedly connected to the inner wall of the air delivery pipe in a sealed manner. An installation cavity is opened inside the first sealing block. An air delivery hole penetrating through the installation cavity is opened in the middle of the rear end of the first sealing block. An adjusting block is rotatably sealed inside the installation cavity. A communication groove matching the air delivery hole is opened on the outer side of the adjusting block. A rotating rod is fixed to the upper end of the adjusting block. A handle is fixed to the end of the rotating rod extending out of the air delivery pipe. A second sealing block is fixed to the front wall of the cavity, and the second sealing block is fixedly connected to the inner wall of the air delivery pipe. A groove is opened in the middle of the rear end of the second sealing block. A push rod is slidably provided inside the groove. An elastic member is provided between the push rod and the groove. A plugging head matching the communication groove is fixed to the rear end of the push rod. Ventilation grooves communicating with the cavity are symmetrically opened at the edge of the rear end of the second sealing block. A plugging assembly is provided between the sealing door and the gas-insulated switchgear body.

[0008] Further, the plugging assembly includes an annular sealing rubber ring. L-shaped clamping plates are fixed to the four sides at the rear end of the sealing door. The annular sealing rubber ring is arranged outside the four L-shaped clamping plates. Plugging strips are provided at the four corners of the rear wall of the gas-insulated switchgear body, and each plugging strip abuts against the rear end of the sealing door. Symmetrically arranged gas filling pipes are communicated between the lower side of the annular sealing rubber ring and the cavity.

[0009] Further, cover plates are installed at the upper ends of the two plugging strips at the lower side.

[0010] Further, two support blocks are provided at the lower side of the cavity.

[0011] Further, a threaded cap is sleeved outside the rear end of the gas transmission pipe, and anti-slip threads are provided on the outside of the threaded cap.

[0012] Further, a sealing groove is provided in the middle of the front end of the first sealing block, and a sealing ring matching the sealing groove is provided outside the plugging head.

[0013] The beneficial effects of the present utility model are as follows:

[0014] 1) When filling gas, the gas will push the plugging head forward and compress the elastic member, so that the gas remains in a flowing state. After filling the gas, the air pressure inside the gas-insulated switchgear is greater than the external air pressure, and the gas will flow back. At this time, the compressed elastic member will return to its original state and push the push rod and the plugging head to plug the gas transmission hole. At the same time, the gas will further squeeze the sealing ring into the sealing groove, thereby ensuring that the gas will not leak.

[0015] 2) Through the transmission of the gas filling pipe, the gas entering the cavity can be transported to the inside of the annular sealing rubber ring. Under the filling of the gas, the annular sealing rubber ring can be inflated and expanded, so as to plug the edge gap between the sealing door and the gas-insulated switchgear body. At the same time, in cooperation with the plugging of each plugging strip, the gaps at the four corners between the sealing door and the gas-insulated switchgear body can be plugged, so as to prevent gas leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present utility model can be further illustrated by the non-limiting embodiments given in the drawings.

[0017] Figure 1 is a schematic structural diagram of a gas-insulated switchgear with a multiple sealing function according to the present utility model;

[0018] Figure 2 is a schematic cross-sectional structural diagram of a gas-insulated switchgear with a multiple sealing function according to the present utility model;

[0019] Figure 3 is Figure 2 the structural diagram at A in

[0020] The descriptions of the main component symbols are as follows:

[0021] The gas-insulated switchgear body 100, the sealing door 101, the cavity 102, the air leakage groove 103, the gas transmission pipe 104, the first sealing block 105, the installation cavity 106, the gas transmission hole 107, the adjusting block 108, the communication groove 109, the rotating rod 110, the handle 111, the second sealing block 112, the groove 113, the push rod 114, the elastic member 115, the plugging head 116, the ventilation groove 117, the annular sealing rubber ring 200, the L-shaped clamping plate 201, the plugging strip 202, the gas filling pipe 203, the covering plate 204, the supporting block 205, the threaded cover 206, the sealing groove 207, and the sealing ring 208. Specific implementation mode

[0022] In order to enable those skilled in the art to better understand the present utility model, the technical solutions of the present utility model will be further described below with reference to the drawings and embodiments.

[0023] Embodiment 1:

[0024] As Figures 1 - 3 shown, a gas-insulated switchgear with a multiple sealing function includes a gas-insulated switchgear body 100. The front end of the gas-insulated switchgear body 100 is open. A sealing door 101 is provided at the front end of the gas-insulated switchgear body 100. A cavity 102 is formed inside the gas-insulated switchgear body 100. An air leakage groove 103 is formed on the upper wall of the lower side of the cavity 102. A gas transmission pipe 104 is provided at the lower side of the rear end of the gas-insulated switchgear body 100. A sealing switch assembly is provided inside the gas transmission pipe 104;

[0025] The sealing switch assembly includes a first sealing block 105. The first sealing block 105 is fixedly connected to the inner wall of the gas transmission pipe 104 in a sealed manner. An installation cavity 106 is formed inside the first sealing block 105. A gas transmission hole 107 penetrating through the installation cavity 106 is formed in the middle of the rear end of the first sealing block 105. An adjusting block 108 is rotatably sealed inside the installation cavity 106. A communication groove 109 matching the gas transmission hole 107 is formed on the outer side of the adjusting block 108. A rotating rod 110 is fixed to the upper end of the adjusting block 108. A handle 111 is fixed to the end of the rotating rod 110 extending out of the gas transmission pipe 104. A second sealing block 112 is fixed to the front wall of the cavity 102, and the second sealing block 112 is fixedly connected to the inner wall of the gas transmission pipe 104. A groove 113 is formed in the middle of the rear end of the second sealing block 112. A push rod 114 is slidably arranged inside the groove 113. An elastic member 115 is provided between the push rod 114 and the groove 113. A plugging head 116 matching the communication groove 109 is fixed to the rear end of the push rod 114. Ventilation grooves 117 communicating with the cavity 102 are symmetrically formed at the rear end edge of the second sealing block 112. A plugging assembly is provided between the sealing door 101 and the gas-insulated switchgear body 100.

[0026] The sealing door 101 can initially seal the gas-insulated switchgear body 100. The gas-insulated switchgear body 100 is arranged in a double-layer structure due to the cavity 102, which can not only reduce the weight of the gas-insulated switchgear body 100, but also enhance the heat insulation of the gas-insulated switchgear body 100 to the outside world. The air leakage groove 103 can allow the gas inside the cavity 102 to enter the inside of the gas-insulated switchgear body 100. The gas transmission pipe 104 can serve as a channel for the outside gas to enter the inside of the gas-insulated switchgear body 100. The staff can rotate the handle 111, and the handle 111 can drive the rotating rod 110 to rotate. The rotating rod 110 can drive the adjusting block 108 to rotate, thereby adjusting the position of the communication groove 109. When the communication groove 109 is communicated with the gas transmission hole 107, the gas can pass through. After the communication groove 109 is disconnected from the gas transmission hole 107, the gas cannot pass through, so as to achieve the purpose of gas sealing. The plugging head 116 can perform secondary sealing on the gas transmission hole 107. When the outside gas is introduced, the plugging head 116 can push the push rod 114 and the plugging head 116 to slide into the groove 113, so that the gas can enter the cavity 102 through the ventilation groove 117. The plugging assembly can perform secondary sealing on the gap between the sealing door 101 and the gas-insulated switchgear body 100, thereby realizing the multi-layer sealing effect of the gas-insulated switchgear.

[0027] When inflating the gas-insulated switchgear body 100: First, connect the gas transmission pipe 104 to the gas compressor, and then turn the handle 111. The handle 111 drives the rotating rod 110, the adjusting block 108 and the communication groove 109 to rotate synchronously until the communication groove 109 is communicated with the gas transmission hole 107. Under the push of the gas, the plugging head 116 will be pushed forward and compress the elastic member 115, and the gas can flow into the cavity 102 through the ventilation groove 117. Part of the gas entering the cavity 102 remains inside the cavity 102, and the other part of the gas enters the inside of the gas-insulated switchgear through the air leakage groove 103, so as to achieve the purpose of protecting the electrical components inside the gas-insulated switchgear. Finally, just turn the handle 111 again to make the communication groove 109 perpendicular to the gas transmission hole 107, so that the filling of the gas-insulated switchgear can be completed. Moreover, under the pressure of the gas inside the gas-insulated switchgear, after the elastic member 115 returns to its original state, the plugging head 116 can be secondarily plugged, strengthening the sealing of the gas inside the gas-insulated switchgear, and thus preventing the problem of gas leakage caused by equipment aging.

[0028] In this embodiment, through the mutual cooperation between the adjusting block 108 and the plugging head 116 and the first sealing block 105, double-layer sealing of the inside of the gas transmission pipe 104 is achieved, preventing gas leakage caused by the aging of the gas transmission pipe 104. At the same time, when the gas is input, the plugging assembly can be further triggered to perform secondary sealing on the gap between the sealing door 101 and the gas-insulated switchgear body 100, so that multi-layer sealing of the gas-insulated switchgear can be realized.

[0029] Embodiment 2:

[0030] On the basis of Embodiment 1, other components on the gas-insulated switchgear will be further described. For example Figures 2 - 3 As shown, the plugging assembly includes an annular sealing rubber ring 200. L-shaped clamping plates 201 are fixed to the four sides at the rear end of the sealing door 101. The annular sealing rubber ring 200 is arranged outside the four L-shaped clamping plates 201. Plugging strips 202 are provided at the four corners of the rear wall of the gas-insulated switchgear body 100, and each plugging strip 202 abuts against the rear end of the sealing door 101. Symmetrically arranged gas filling pipes 203 are communicated between the lower side of the annular sealing rubber ring 200 and the cavity 102.

[0031] Cover plates 204 are installed at the upper ends of the two lower plugging strips 202.

[0032] Two support blocks 205 are provided on the lower side of the cavity 102.

[0033] A threaded cap 206 is sleeved on the outer side of the rear end of the gas transmission pipe 104, and anti-slip threads are provided on the outer side of the threaded cap 206.

[0034] A sealing groove 207 is provided in the middle of the front end of the first sealing block 105, and a sealing ring 208 matching the sealing groove 207 is provided on the outer side of the plugging head 116.

[0035] In this embodiment, when gas is introduced into the cavity 102, through the transmission of gas by the gas filling pipes 203, the annular sealing rubber ring 200 can be inflated and bulged. With the restriction of each L-shaped clamping plate 201, the gap between the sealing door 101 and the gas-insulated switchgear body 100 can be sealed and plugged. The cooperation of each plugging strip 202 and the annular sealing rubber ring 200 can also plug the gaps at the four corners between the sealing door 101 and the gas-insulated switchgear body 100.

[0036] The cover plates 204 are placed on the upper ends of the two lower plugging strips 202, which can cover the two plugging strips 202 to prevent damage to the outer side of the gas filling pipes 203 when the staff installs electrical components, thus affecting the seal between the sealing door 101 and the gas-insulated switchgear body 100.

[0037] The support blocks 205 can provide auxiliary support for the inside of the cavity 102, strengthen the strength inside the cavity 102, and prevent the cavity 102 from being sunken.

[0038] When inflating the gas-insulated switchgear body 100, the threaded cap 206 can threadedly fix the inflating connecting pipe, liberating the hands of the staff.

[0039] After the sealing ring 208 is snapped into the sealing groove 207, the gas transmission hole 107 can be plugged to further prevent gas backflow and leakage.

[0040] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by terms such as "front end", "rear end", "upper end", "one end", "lower side", "outer side", "front wall", "rear wall", "inner wall", "upper wall", "inside", "middle", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0041] In the present utility model, unless otherwise clearly specified and defined, terms such as "sealed rotation", "sliding", "fixing", "connecting", "installing", "sheathing", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. It can be the communication inside two elements or the interaction relationship between two elements. Unless otherwise clearly defined, for those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0042] The above is only the preferred embodiment of the present utility model. It should be understood that the present utility model is not limited to the form disclosed herein, should not be regarded as excluding other embodiments, but can be used in various other combinations, modifications and environments, and can be changed within the scope of the concept described herein through the above teachings or the techniques or knowledge in related fields. And the changes and alterations made by those skilled in the art that do not depart from the spirit and scope of the present utility model shall fall within the protection scope of the appended claims of the present utility model.

Claims

1. An inflatable cabinet with multiple sealing functions, comprising an inflatable cabinet body (100), characterized in that: The front end of the gas cabinet body (100) is arranged in an open shape, the front end of the gas cabinet body (100) is provided with a sealing door (101), a cavity (102) is provided inside the gas cabinet body (100), a gas leakage groove (103) is provided on the lower upper wall of the cavity (102), a gas delivery pipe (104) is provided on the lower side of the rear end of the gas cabinet body (100), and a sealing switch assembly is provided inside the gas delivery pipe (104); The sealed switch assembly comprises a first sealing block (105), the first sealing block (105) is sealed and fixedly connected to the inner wall of the gas delivery pipe (104), a mounting cavity (106) is provided inside the first sealing block (105), a gas delivery hole (107) penetrating the mounting cavity (106) is provided in the middle of the rear end of the first sealing block (105), an adjusting block (108) is sealed and rotatable inside the mounting cavity (106), a connecting groove (109) matching the gas delivery hole (107) is provided on the outer side of the adjusting block (108), a rotating rod (110) is fixed on the upper end of the adjusting block (108), a handle (111) is fixed on the end of the rotating rod (110) extending out of the gas delivery pipe (104), and the air A second sealing block (112) is fixed to the front wall of the cavity (102), and the second sealing block (112) is fixedly connected to the inner wall of the gas pipe (104); a groove (113) is provided in the middle of the rear end of the second sealing block (112); a push rod (114) is slidably provided inside the groove (113); an elastic member (115) is provided between the push rod (114) and the groove (113); a sealing head (116) matching the connecting groove (109) is fixed to the rear end of the push rod (114); a ventilation groove (117) communicating with the cavity (102) is symmetrically provided at the rear end edge of the second sealing block (112); and a sealing component is provided between the sealing door (101) and the inflatable cabinet body (100).

2. The inflatable cabinet with multiple sealing functions according to claim 1, characterized in that: The blocking component comprises an annular sealing rubber ring (200), L-shaped cardboards (201) are fixed to the four sides of the rear end of the sealing door (101), the annular sealing rubber ring (200) is arranged on the outside of the four L-shaped cardboards (201), the four corners of the rear wall of the inflation cabinet body (100) are provided with blocking strips (202), and each of the blocking strips (202) is in contact with the rear end of the sealing door (101), and mutually symmetrical inflation tubes (203) are connected between the lower side of the annular sealing rubber ring (200) and the cavity (102).

3. The inflatable cabinet with multiple sealing functions according to claim 2, characterized in that: Cover plates (204) are installed on the upper ends of the two blocking strips (202) on the lower side.

4. The inflatable cabinet with multiple sealing functions according to claim 1, characterized in that: Two support blocks (205) are provided on the lower side of the cavity (102).

5. The inflatable cabinet with multiple sealing functions according to claim 1, characterized in that: A threaded cover (206) is sleeved on the outer side of the rear end of the gas delivery pipe (104), and anti-slip grooves are formed on the outer side of the threaded cover (206).

6. The inflatable cabinet with multiple sealing functions according to claim 1, characterized in that: A sealing groove (207) is provided in the middle of the front end of the first sealing block (105), and a sealing ring (208) matching the sealing groove (207) is provided on the outer side of the plugging head (116).

Images