Gas insulated switch cabinet for power grid power

Abstract

The invention discloses a gas insulation switch cabinet for power grid power, and particularly relates to the technical field of switch cabinets, the gas insulation switch cabinet comprises a cabinet body, a plurality of insulation gas boxes, the back of each insulation gas box is detachably provided with an opening and closing door, and two sides of the bottom of each opening and closing door are symmetrically provided with two walking racks; and a push injection area is arranged on one side of the push injection part. According to the device, the pushing and injecting piece is arranged to be matched with the alternating piece, and the two output pipe pieces are alternately conveyed to the top and the bottom of the insulating gas box, so that insulating gas in the insulating gas box is rapidly disturbed up and down, and the safety problem that the temperature of the local insulating gas rises can be rapidly relieved; the two pressurizing mechanisms are synchronously controlled to move close to each other, the space in the insulating gas tank is changed, and the insulating gas is synchronously extruded and forced to flow, so that the insulating gas in the insulating gas tank is distributed more uniformly, the problem of non-uniform temperature is avoided, the structural design of the insulating gas tank is optimized, and the operation safety is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of switch cabinets, and specifically to a gas-insulated switch cabinet for grid power. Background Art

[0002] A gas-insulated switch cabinet is a switch cabinet that uses a gas with high insulation strength and high arc-extinguishing ability as the arc-extinguishing medium. It uses the insulating gas to establish a good insulation environment in the sealed gas tank, enabling the internal primary high-voltage components to operate safely in a relatively small space.

[0003] Electrical equipment inside the switch cabinet gas tank, such as busbars, circuit breakers, disconnectors, etc., will generate heat during operation. For example, when a large current passes through the busbar, Joule heat will be generated due to the existence of resistance. The positions of these heating elements are different, which will cause different degrees of temperature rise of the insulating gas around them, resulting in inconsistent heat uniformity of the insulating gas inside the switch cabinet gas tank. This is extremely likely to interfere with the overall insulation condition, leading to problems such as reduced insulation strength, accelerated insulation aging, and changed electric field distribution. At the same time, there is also the problem of local condensation of moisture.

[0004] A gas-insulated switch cabinet disclosed in a patent application with the reference publication number CN118040529B. Through the mutual cooperation of the condensation compression component, evaporator, and condenser, this switch cabinet can be quickly cooled. In addition, through the shock absorption component, during the handling of the device, the impact of transportation vibration on the gas-insulated switch cabinet can be reduced, improving the safety during transportation.

[0005] The above switch cabinet can complete the cooling operation of the switch cabinet through structures such as a condenser. However, the cooling mechanism of the above switch cabinet has relatively large limitations as a whole. It can only cool the surface of the cabinet body, but cannot perform continuous temperature equalization control on the inside of the key gas tank structure of the switch cabinet, cannot ensure a good working state inside the switch cabinet gas tank, resulting in a situation of local temperature difference in the insulating gas inside the gas tank, greatly affecting the insulation strength of the gas tank, synchronously reducing the service life of the gas tank, and at the same time, it is likely to interfere with the operation stability of electrical equipment, increasing the subsequent maintenance workload. Summary of the Invention

[0006] The purpose of the present invention is to provide a gas-insulated switch cabinet for grid power to solve the above technical problems.

[0007] To solve the above technical problems, the present invention is realized through the following technical solutions.

[0008] The present invention is a gas-insulated switch cabinet for grid power, including a cabinet body, and further including:

[0009] A plurality of insulating gas tanks, and an opening and closing door can be detachably installed on the back of each insulating gas tank;

[0010] A push-injection member, a push-injection area is provided on one side of the push-injection member, an inlet is provided through the bottom of the push-injection area and is connected to the insulating gas box, a lead-out port is provided through one side of the top of the push-injection area, a drying member is installed at the lead-out port, a push-injection disk is slidably installed in the push-injection area, and an alternating member is provided on the push-injection member and is drivingly connected to the push-injection disk;

[0011] Two output pipes are symmetrically installed on the top of the front end of the push-in piece. Both output pipes are interconnected with the drying piece. Two pressurizing pipes that are interconnected with the two output pipes are installed on the top and bottom of each insulating gas box. The alternating piece controls the two output pipes to send the insulating gas alternately through the two pressurizing pipes to complete the temperature control.

[0012] Two pressurizing mechanisms are symmetrically arranged at the top and bottom of each insulating gas box and connected to two pressurizing pipes. The alternating parts control the relative movement of the two pressurizing mechanisms to complete the turbulent flow operation of the insulating gas in each insulating gas box.

[0013] Further, the drying element comprises:

[0014] The drying box is mounted on the push-injection piece through a bracket, and a top cover is detachably mounted on the top of the drying box;

[0015] A drying body, slidably disposed in the drying box and connected to the top cover;

[0016] The main pipeline is connected and installed between the drying box and the outlet;

[0017] The shunt pipe is installed on the other side of the drying box and communicates with the two output pipes.

[0018] Furthermore, each output pipe comprises:

[0019] The outlet pipe is installed on the top of the push-injection piece through a bracket, and a removable seal is installed at the tail of the outlet pipe with an end cap;

[0020] The guide area is arranged at the tail of the lead-out pipeline, and a blocking plate is installed in the guide area in a sliding and sealing manner. The blocking plate slides in the guide area to complete the dynamic blocking of the lead-out pipeline.

[0021] Furthermore, each output pipe also includes:

[0022] No. 1 pipe is connected and installed on the end cover, and the No. 1 pipe is interconnected with the diversion pipe through the pipeline;

[0023] Pipe No. 2 is connected and installed at the front end of the outlet pipe.

[0024] Further, the alternating element comprises:

[0025] A fixed frame, arranged on the ejector, on which an alternating shaft is rotatably mounted;

[0026] An alternating gear is rotatably sleeved outside the alternating shaft, and a first one-way bearing is arranged between the alternating gear and the alternating shaft;

[0027] Two alternating discs are symmetrically installed at both ends of the alternating shaft;

[0028] Two transmission arms are correspondingly rotatably installed on the two alternating discs through pin shafts. The hinge point of each transmission arm is arranged offset from the center of the alternating disc. The tops of the two transmission arms are respectively hinged to the bottoms of the two output pipe fittings, and the transmission arms on the two alternating discs are arranged in a height dislocation to complete the alternating switching control of the two output pipe fittings;

[0029] A control shaft slides through the injection part and is connected to the injection disc, and a control rack meshing with the alternating gear is installed at the tail of the control shaft.

[0030] Furthermore, the alternating part further includes:

[0031] An extrusion cavity is installed at the tail of the injection part through a bracket;

[0032] A first piston part is slidably and sealingly installed in the extrusion cavity and is connected to the control rack;

[0033] A distributor is connected and installed at the front end of the extrusion cavity.

[0034] Furthermore, each pressurizing pipe fitting includes:

[0035] A lifting frame is arranged in the insulating gas box through a bracket. A reciprocating lead screw is rotatably installed in the lifting frame, and a lead screw nut is slidably installed in the lifting frame. The lead screw nut is correspondingly sleeved outside the reciprocating lead screw;

[0036] An air supply pipe is detachably installed on the lead screw nut. A plurality of air supply ports are evenly arranged on the air supply pipe, and the air supply pipe communicates with the output pipe fitting through a pipeline.

[0037] Furthermore, each pressurizing pipe fitting further includes:

[0038] A rotating shaft is rotatably installed at the top of the lifting frame and is in transmission connection with the reciprocating lead screw;

[0039] A traveling gear is rotatably sleeved outside the rotating shaft, and a second one-way bearing is arranged between the traveling gear and the rotating shaft.

[0040] Furthermore, each pressurizing mechanism includes:

[0041] An extrusion plate is slidably and sealingly installed in the insulating gas box. Two traveling racks are symmetrically installed at the top and bottom on one side of the extrusion plate, and the two traveling racks are respectively in power connection with the two pressurizing pipe fittings;

[0042] Four guide posts are arranged in a rectangular shape in the insulating gas box. Each guide post slides through the extrusion plate. A plug is installed on the top of each guide post. A return spring is sleeved on the outside of each guide post. The return spring is arranged between the plug and the extrusion plate.

[0043] Furthermore, each pressurizing mechanism also includes:

[0044] A pressurized chamber is provided in the insulating gas box and communicates with the alternating member through a pipeline;

[0045] The second piston member and the sliding seal are installed in the pressurized chamber and connected to the extrusion plate.

[0046] Compared with the prior art, the present invention has the following beneficial effects:

[0047] 1. The present invention is provided with a push-injection piece and adopts a push-injection plate design, which can continuously draw the insulating gas in the insulating gas box into the push-injection area. At the same time, an alternating piece is arranged, and the insulating gas is alternately transported to the top and bottom of the insulating gas box through two output pipes, so that the insulating gas in the insulating gas box is quickly disturbed up and down, which accelerates the flow of the insulating gas and can quickly alleviate the safety problem of the local insulating gas temperature increase;

[0048] 2. The present invention is provided with a pressurizing mechanism. The alternating member synchronously controls the two pressurizing mechanisms to move closer to each other under reciprocating motion, changes the space in the insulating gas box, and synchronously squeezes and forces the insulating gas to flow. Such a design can dynamically change the pressure value in the insulating gas box, accelerate the flow of the insulating gas, make the distribution of the insulating gas in the insulating gas box more uniform, avoid the problem of uneven temperature, ensure insulation, optimize the structural design of the insulating gas box, and improve the safety of operation;

[0049] 3. The present invention is provided with an alternating part to control the alternating shaft to rotate, so that the two alternating disks rotate accordingly, control the two transmission arms to complete the position exchange, and link the sealing plate connected thereto to move to complete the switching control of the lead-out pipe. Since the two transmission arms are highly staggered, after the position is changed, the originally opened lead-out pipe is closed and the originally closed lead-out pipe is opened, so that the insulating gas is alternately transported to the top and bottom of the insulating gas box to complete the turbulence treatment, thereby increasing the flow rate of the gas in the insulating gas box and avoiding the problem of local temperature rise.

[0050] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 It is the overall front view of the present invention;

[0052] Figure 2Schematic diagram of the installation of the insulating gas tank of the present invention in the cabinet;

[0053] Figure 3 Schematic diagram of the insulating gas tank of the present invention;

[0054] Figure 4 Schematic diagram of the installation of the opening and closing door of the present invention in the insulating gas tank;

[0055] Figure 5 Schematic diagram of the separation of the opening and closing door and the insulating gas tank of the present invention;

[0056] Figure 6 Schematic diagram inside the insulating gas tank of the present invention;

[0057] Figure 7 Schematic diagram of the installation of the pressurizing mechanism of the present invention in the insulating gas tank;

[0058] Figure 8 Schematic diagram of the pressurizing mechanism of the present invention;

[0059] Figure 9 Schematic diagram of the injection part of the present invention;

[0060] Figure 10 Schematic diagram of the distribution of the injection part and two output pipe fittings of the present invention;

[0061] Figure 11 Schematic diagram inside the injection area of the present invention;

[0062] Figure 12 Schematic diagram of the drying part of the present invention;

[0063] Figure 13 Schematic diagram of the alternating part of the present invention;

[0064] Figure 14 Schematic diagram of the connection between the output pipe fitting and the alternating part of the present invention;

[0065] Figure 15 Schematic diagram inside the output pipe fitting of the present invention.

[0066] In the figure: 1, cabinet body; 2, cabinet door; 3, insulating gas box; 4, opening and closing door; 5, walking rack; 6, injection part; 7, injection area; 8, inlet; 9, outlet; 10, injection plate; 11, electric push rod; 12, drying box; 13, drying body; 14, main pipeline; 15, shunt pipe; 16, lead-out pipeline; 17, sealing plate; 18, fixing frame; 19, alternating shaft; 20, alternating gear; 21, first one-way bearing; 22, alternating plate; 23, transmission arm; 24, control shaft; 25, control rack; 26, extrusion cavity; 27, first piston part; 28, distributor; 29, lifting frame; 30, reciprocating lead screw; 31, lead screw nut; 32, air supply pipe; 33, rotating shaft; 34, walking gear; 35, second one-way bearing; 36, extrusion plate; 37, guiding column; 38, return spring; 39, pressure relief tank; 40, pressurization cavity; 41, second piston part. Specific embodiments

[0067] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention.

[0068] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "periphery", etc. indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0069] Embodiment 1: The present invention provides a technical solution: As Figures 1 to 6 shown, a gas-insulated switchgear for power grids includes a cabinet body 1, and a cabinet door 2 is rotatably installed at the front end of the cabinet body 1 through a hinge. It further includes:

[0070] A plurality of insulating gas boxes 3 are evenly distributed and assembled in the cabinet body 1 through brackets. An opening and closing door 4 is detachably installed on the back of each insulating gas box 3. Electrical equipment is installed in each insulating gas box 3, and an insulating gas with a certain pressure is injected into the insulating gas box 3.

[0071] As Figure 9 , Figure 10 and Figure 11As shown, the push-injection member 6 is detachably mounted on the opening and closing door 4 of each insulating gas box 3 through a bracket, a push-injection area 7 is opened on one side of the push-injection member 6, an inlet 8 communicating with the insulating gas box 3 is opened through the bottom of the push-injection area 7, a No. 1 check valve for controlling the one-way introduction of insulating gas into the push-injection area 7 is installed in the inlet 8, a lead-out port 9 is penetrated on one side of the top of the push-injection area 7, a No. 2 check valve for controlling the one-way exit of insulating gas from the push-injection area 7 is installed in the lead-out port 9, a drying member is installed at the lead-out port 9, a push-injection disk 10 is slidably mounted in the push-injection area 7, an electric push rod 11 drivingly connected to the push-injection disk 10 is installed on one side of the push-injection member 6 through a bracket, and an alternating member drivingly connected to the push-injection disk 10 is installed on the push-injection member 6;

[0072] Two output pipes are symmetrically installed at the top of the front end of the pusher 6. Both output pipes are interconnected with the drying part. Two pressurizing pipes that are interconnected with the two output pipes are installed at the top and bottom of each insulating gas box 3. The alternating part controls the two output pipes to send the insulating gas alternately through the two pressurizing pipes to complete the temperature control.

[0073] Two pressurizing mechanisms are symmetrically arranged at the top and bottom of each insulating gas box 3 and connected to two pressurizing pipes. The alternating member controls the relative movement of the two pressurizing mechanisms to complete the turbulence operation of the insulating gas in each insulating gas box 3;

[0074] It is worth noting that: when reciprocating injection is performed: by providing the injection member 6, after regular operation, the temperature of the local area in the insulating gas box 3 rises. At this time, the electric push rod 11 is controlled to push the injection disk 10 to move back and forth in the injection area 7. When the injection disk 10 moves up, the insulating gas in the insulating gas box 3 is sucked into the injection area 7 through the inlet 8. When the injection disk 10 moves down, the insulating gas temporarily stored in the injection area 7 is pushed out through the outlet 9. The insulating gas is sent to the drying box 12 through the main pipeline 14 and is condensed by the drying body 13. The moisture in the insulating gas is absorbed to prevent the change of the insulating gas humidity from interfering with the electrical equipment. Then, the insulating gas is sent to the lead-out pipe 16 of the two output pipes through the shunt pipe 15, and then the insulating gas is sent to the air supply pipe 32. The insulating gas is shunted to the top and bottom of the insulating gas box 3 through multiple air supply ports. With this design, the insulating gas can be reciprocatedly shunted to the top and bottom of the insulating gas box 3 through the pusher 6, which accelerates the flow of the insulating gas and avoids the problem of uneven temperature of the insulating gas.

[0075] like Figure 12 As shown, in the embodiment of the present invention, the drying element includes:

[0076] The drying box 12 is mounted on the push-injection member 6 through a bracket, and a top cover is detachably mounted on the top of the drying box 12;

[0077] A drying body 13 is slidably disposed in the drying box 12 and connected to the top cover. The drying body 13 is made of sponge or other drying materials;

[0078] The main pipeline 14 is connected and installed between the drying box 12 and the outlet 9, and a No. 1 control valve for controlling the on-off of the main pipeline 14 is installed on the main pipeline 14;

[0079] A shunt pipe 15 is installed on the other side of the drying box 12 and communicates with the two output pipes. A second control valve is installed on the shunt pipe 15 to control the on-off thereof;

[0080] like Figure 14 and Figure 15 As shown, in the embodiment of the present invention, each output pipe comprises:

[0081] The outlet pipe 16 is mounted on the top of the push-injection member 6 through a bracket, and an end cap is detachably sealed and mounted at the tail of the outlet pipe 16;

[0082] The guide area is provided at the tail of the outlet pipe 16, and a blocking plate 17 is installed in a sliding and sealing manner in the guide area. The bottom of the blocking plate 17 extends out of the outlet pipe 16, and the blocking plate 17 slides in the guide area to complete the dynamic blocking of the outlet pipe 16;

[0083] Each output fitting also includes:

[0084] The first pipe is connected and installed on the end cover, and the first pipe is interconnected with the diverter pipe 15 through a pipeline;

[0085] No. 2 pipe, connected and installed at the front end of the outlet pipe 16;

[0086] In the embodiment of the present invention, each pressurized pipe comprises:

[0087] A lifting frame 29 is arranged in the insulating gas box 3 through a bracket, a reciprocating screw 30 is rotatably installed in the lifting frame 29, and a screw nut 31 is slidably installed in the lifting frame 29, and the screw nut 31 is correspondingly sleeved on the outside of the reciprocating screw 30;

[0088] The air supply pipe 32 is detachably mounted on the screw nut 31, and a plurality of air supply ports are evenly opened on the air supply pipe 32, and the air supply pipe 32 is interconnected with the No. 1 pipe of the output pipe fitting through a pipeline;

[0089] Each pressurized fitting also includes:

[0090] The rotating shaft 33 is rotatably mounted on the top of the lifting frame 29 and is transmission-connected to the reciprocating screw rod 30;

[0091] The traveling gear 34 is rotatably sleeved outside the rotating shaft 33 , and a second one-way bearing 35 is provided between the traveling gear 34 and the rotating shaft 33 .

[0092] Among them, the electric push rod 11 and other electrical components are connected to switches through wires, and the switches are electrically connected to controllers, and the specific structure of the controller is not limited.

[0093] Embodiment 2: Based on the alternating piece provided in Embodiment 1, this embodiment provides a further technical solution of the alternating piece.

[0094] like Figure 13 As shown, the alternating piece comprises:

[0095] A fixed frame 18 is arranged on the pusher 6, an alternating shaft 19 is rotatably mounted on the fixed frame 18, a ratchet pawl mechanism is installed between the alternating shaft 19 and the fixed frame 18, and the ratchet pawl mechanism is used to control the alternating shaft 19 to limit the rotation. Specifically, the ratchet is sleeved on the alternating shaft 19, and the pawl is rotatably mounted on the fixed frame 18 through a torsion spring, and the rotation limitation of the ratchet is completed by the pawl;

[0096] The alternating gear 20 is rotatably sleeved outside the alternating shaft 19, and a first one-way bearing 21 is arranged between the alternating gear 20 and the alternating shaft 19;

[0097] Two alternating discs 22 are symmetrically mounted at both ends of the alternating shaft 19;

[0098] Two transmission arms 23 are mounted on the two alternating disks 22 through corresponding rotation of the pin shafts. The hinge point of each transmission arm 23 is set away from the center of the alternating disk 22. The tops of the two transmission arms 23 are respectively hinged to the bottoms of the blocking plates 17 of the two output pipes, and the transmission arms 23 on the two alternating disks 22 are highly staggered, so as to complete the alternating switching control of the two output pipes.

[0099] A control shaft 24 is slidably passed through the pusher 6 and connected to the pusher disk 10, and a control rack 25 meshing with the alternating gear 20 is installed at the tail of the control shaft 24;

[0100] It should be noted that when the insulating gas is alternately disturbed and controlled: by providing an alternating member, when the injection plate 10 moves downward, the control shaft 24 is driven to move accordingly. When the control shaft 24 moves downward, at this time, the first one-way bearing 21 is unlocked and does not restrict, and the alternating shaft 19 does not rotate. The insulating gas sent out through the injection area 7 is discharged through the lead-out pipe 16 on the opened side. When the control shaft 24 moves upward, at this time, the first one-way bearing 21 is locked to restrict, and the alternating shaft 19 is controlled to rotate, so that the two alternating disks 22 rotate accordingly, and the two transmission arms 23 are controlled to complete the position exchange, and the blocking plate 17 connected thereto is linked to move to complete the switching control of the lead-out pipe 16. Since the two transmission arms 23 are arranged in a highly staggered manner, after the position conversion, the originally opened lead-out pipe 16 is closed, and the originally closed lead-out pipe 16 is opened, so as to alternately transport the insulating gas to the top and bottom of the insulating gas tank 3 to complete the turbulence treatment, increasing the gas flow rate in the insulating gas tank 3 and avoiding the problem of local temperature rise;

[0101] The alternating member further includes:

[0102] The extrusion cavity 26 is installed at the tail of the injection member 6 through a bracket, and a certain amount of medium is injected into the extrusion cavity 26. The medium is specifically one of hydraulic oil and gas;

[0103] The first piston member 27 is slidably and sealingly installed in the extrusion cavity 26 and connected to the control rack 25;

[0104] The distributor 28 is connected and installed at the front end of the extrusion cavity 26.

[0105] Embodiment 3: Based on the pressurizing mechanism provided in Embodiment 1, this embodiment provides a further technical solution of the pressurizing mechanism.

[0106] As Figure 7 and Figure 8 shown, each pressurizing mechanism includes:

[0107] The extrusion plate 36 is slidably and sealingly installed in the insulating gas tank 3. Two traveling racks 5 are symmetrically installed at the top and bottom on one side of the extrusion plate 36. The two traveling racks 5 are respectively in power connection with the two pressurizing pipe fittings. Specifically, the traveling rack 5 meshes with the traveling gear 34, and the extrusion plate 36 is spaced and connected with the lifting frame 29 of the pressurizing pipe fitting, so that the extrusion plate 36 obtains a certain moving space;

[0108] Four guiding columns 37 are arranged in a rectangular distribution in the insulating gas tank 3. Each guiding column 37 slidably passes through the extrusion plate 36. A plug is installed at the top of each guiding column 37, and a return spring 38 is sleeved on the outside of each guiding column 37. The return spring 38 is arranged between the plug and the extrusion plate 36;

[0109] The pressure relief tank 39 is arranged on the insulating gas tank 3, and the pressure relief tank 39 communicates with the isolation area between the extrusion plate 36 and the insulating gas tank 3 to complete air pressure compensation. Specifically, the pressure relief tank 39 communicates with the outside gas. When the extrusion plate 36 moves forward, the outside gas is controlled to compensate the isolation area. When the extrusion plate 36 resets, the gas is extruded and reset, so as to complete the stable movement of the extrusion plate 36;

[0110] Each pressurizing mechanism further includes:

[0111] The pressurizing chamber 40 is opened in the insulating gas tank 3, and the pressurizing chamber 40 communicates with the distributor 28 of the alternating member through a pipeline;

[0112] The second piston member 41 is slidably and sealingly installed in the pressurizing chamber 40 and connected to the extrusion plate 36;

[0113] It should be noted that when controlling the extrusion of the insulating gas in the insulating gas tank 3: by providing a pressurizing mechanism, when the control shaft 24 moves up and down reciprocally, it synchronously drives the first piston member 27 to move, actively controlling the medium in the extrusion chamber 26. When the first piston member 27 moves downward, the medium in the extrusion chamber 26 is pushed into the two pressurizing chambers 40, driving the second piston member 41 therein to move, so that the extrusion plates 36 located at the top and bottom inside the insulating gas tank 3 move closer to each other, changing the space inside the insulating gas tank 3, achieving dynamic control of the air pressure inside the insulating gas tank 3, being able to extrude and push the insulating gas, further accelerating the flow of the insulating gas, realizing multi-mode turbulent flow control for the insulating gas. Subsequently, the first piston member 27 resets, sucking the medium in the pressurizing chamber 40 into the extrusion chamber 26, and under the control of the return spring 38, the extrusion plate 36 resets. With such a design, during the continuous injection process of the injection member 6, the relative movement of the two extrusion plates 36 can be dynamically controlled, accelerating the flow of the insulating gas, optimizing the structural design of the insulating gas tank 3, and improving the operation safety. Since the traveling rack 5 is provided on the extrusion plate 36, when the extrusion plate 36 moves, it drives the traveling rack 5 to move. Since the traveling rack 5 meshes with the traveling gear 34, at this time, the second one-way bearing 35 is locked, so that the traveling amount of the traveling gear 34 is transmitted to the reciprocating lead screw 30 via the rotating shaft 33, controlling the position movement of the lead screw nut 31 and the air supply pipe 32, thereby completing the change of the air supply position, being able to perform turbulent flow treatment on different positions inside the insulating gas tank 3, further enhancing the turbulent flow effect. At the same time, when the extrusion plate 36 resets, the second one-way bearing 35 is unlocked, so that the traveling gear 34 does not rotate, and the extrusion plate 36 carries the traveling rack 5 to reset, enabling the reciprocating lead screw 30 to rotate continuously in a predetermined direction, thereby completing the position adjustment, expanding the turbulent flow interval, and improving the temperature control accuracy. In order to enhance the stability of the reciprocating movement of the extrusion plate 36, a pressure relief tank 39 is added, so that when the extrusion plate 36 moves inside the insulating gas tank 3, the gas balance in the area space between the extrusion plate 36 and the insulating gas tank 3 can be completed, avoiding interference with the operation of the extrusion plate 36.

[0114] The present invention provides a gas-insulated switchgear for power grids. The specific working principle is as follows: First, a plurality of insulating gas boxes 3 are assembled in the cabinet 1, then electrical equipment is arranged in the insulating gas boxes 3, and then the opening and closing door 4 is closed. Then, a certain amount of insulating gas is injected into the insulating gas boxes 3, and subsequent gas insulation protection can be carried out. During operation, heat is locally generated by the electrical equipment, causing the temperature of the insulating gas in a local area of the insulating gas box 3 to rise, affecting the insulation effect and reducing the operating safety. By providing a pushing member 6 and adopting the design of the pushing plate 10, the insulating gas in the insulating gas box 3 can be continuously sucked into the pushing area 7, and at the same time, an alternating member is provided. The insulating gas is alternately transported to the top and bottom of the insulating gas box 3 through two output pipe fittings, so that the insulating gas in the insulating gas box 3 is quickly disturbed up and down, accelerating the flow of the insulating gas and quickly alleviating the safety problem of the local increase in the temperature of the insulating gas. By providing a pressurizing mechanism, when the alternating member reciprocates, two pressurizing mechanisms are synchronously controlled to move closer to each other, changing the space in the insulating gas box 3 and synchronously squeezing and forcing the insulating gas to flow. With such a design, the pressure value in the insulating gas box 3 can be dynamically changed, accelerating the flow of the insulating gas, making the distribution of the insulating gas in the insulating gas box 3 more uniform, avoiding the problem of uneven temperature, ensuring insulation, optimizing the structural design of the insulating gas box 3, and improving the operating safety.

[0115] In the description of this specification, the descriptions referring to terms such as "one embodiment", "example", "specific example", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0116] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific embodiments described. Obviously, many modifications and variations can be made according to the content of this specification. These embodiments are selected and specifically described in this specification to better explain the principles and practical applications of the present invention, so that those skilled in the relevant technical fields can understand and utilize the present invention well. The present invention is only limited by the claims and their full scope and equivalents.

Claims

1. A gas-insulated switchgear for power grid, comprising a cabinet (1), characterized in that: Also includes: A plurality of insulating gas boxes (3), each insulating gas box (3) having a removable opening and closing door (4) installed on the back; A push-injection member (6) is provided with a push-injection area (7) on one side of the push-injection member (6); an inlet (8) communicating with the insulating gas box (3) is provided through the bottom of the push-injection area (7); a lead-out port (9) is provided through the top side of the push-injection area (7); a drying member is installed at the lead-out port (9); a push-injection disk (10) is slidably installed in the push-injection area (7); and an alternating member is provided on the push-injection member (6) and is drivingly connected to the push-injection disk (10); Two output pipes are symmetrically mounted on the top of the front end of the push-injection member (6), and both output pipes are interconnected with the drying member. Two pressurizing pipes that are interconnected with the two output pipes are respectively mounted on the top and bottom of each insulating gas box (3). The alternating member controls the two output pipes to alternately send out the insulating gas through the two pressurizing pipes to complete the temperature control. Two pressurizing mechanisms are symmetrically arranged at the top and bottom of each insulating gas box (3) and connected to two pressurizing pipes. The alternating member controls the relative movement of the two pressurizing mechanisms to complete the flow disturbance operation of the insulating gas in each insulating gas box (3).

2. A gas-insulated switchgear for power grid according to claim 1, characterized in that: The drying element includes: A drying box (12) is mounted on the push-injection member (6) via a bracket, and a top cover is detachably mounted on the top of the drying box (12); A drying body (13) is slidably disposed in the drying box (12) and connected to the top cover; A main pipeline (14) is installed between the drying box (12) and the outlet (9); The shunt pipe (15) is installed on the other side of the drying box (12) and communicates with the two output pipes.

3. A gas-insulated switchgear for power grid according to claim 1, characterized in that: Each output fitting includes: The outlet pipe (16) is mounted on the top of the push-injection member (6) through a bracket, and an end cap is detachably sealed and mounted at the tail of the outlet pipe (16); The guide area is arranged at the tail end of the outlet pipe (16), and a blocking plate (17) is installed in a sliding and sealing manner in the guide area. The blocking plate (17) slides in the guide area to complete dynamic blocking of the outlet pipe (16).

4. A gas-insulated switchgear for power grid according to claim 3, characterized in that: Each output fitting also includes: A No. 1 pipe is connected and installed on the end cover, and the No. 1 pipe is interconnected with the diverter pipe (15) through a pipeline; The second pipe is connected and installed at the front end of the outlet pipe (16).

5. A gas-insulated switchgear for power grid according to claim 1, characterized in that: The replacement parts include: A fixed frame (18) is arranged on the ejector (6), and an alternating shaft (19) is rotatably mounted on the fixed frame (18); An alternating gear (20) is rotatably sleeved outside the alternating shaft (19), and a first one-way bearing (21) is arranged between the alternating gear (20) and the alternating shaft (19); Two alternating discs (22) are symmetrically mounted at both ends of the alternating shaft (19); Two transmission arms (23) are correspondingly rotatably mounted on the two alternating disks (22) via pin shafts, and the hinge point of each transmission arm (23) is arranged away from the center of the alternating disk (22). The tops of the two transmission arms (23) are respectively hinged to the bottoms of the two output pipes, and the transmission arms (23) on the two alternating disks (22) are arranged in a highly staggered manner, thereby completing the alternating switching control of the two output pipes; The control shaft (24) slides through the push-injection member (6) and is connected to the push-injection disk (10). A control rack (25) meshing with the alternating gear (20) is installed at the tail of the control shaft (24).

6. A gas-insulated switchgear for power grid according to claim 5, characterized in that: The alternating piece also includes: An extrusion chamber (26) is mounted on the tail of the push-injection member (6) through a bracket; A first piston member (27) is slidingly and sealingly mounted in the extrusion chamber (26) and connected to the control rack (25); The distributor (28) is connected and installed at the front end of the extrusion chamber (26).

7. A gas-insulated switchgear for power grid according to claim 1, characterized in that: Each pressurized fitting includes: A lifting frame (29) is arranged in the insulating gas box (3) through a bracket, a reciprocating screw rod (30) is rotatably installed in the lifting frame (29), a screw rod nut (31) is slidably installed in the lifting frame (29), and the screw rod nut (31) is correspondingly sleeved on the outside of the reciprocating screw rod (30); The air supply pipe (32) is detachably mounted on the screw nut (31), a plurality of air supply ports are evenly arranged on the air supply pipe (32), and the air supply pipe (32) is interconnected with the output pipe fitting through a pipeline.

8. A gas-insulated switchgear for power grid according to claim 7, characterized in that: Each pressurized fitting also includes: A rotating shaft (33) is rotatably mounted on the top of the lifting frame (29) and is transmission-connected to the reciprocating screw rod (30); The traveling gear (34) is rotatably sleeved outside the rotating shaft (33), and a second one-way bearing (35) is arranged between the traveling gear (34) and the rotating shaft (33).

9. A gas-insulated switchgear for power grid according to claim 1, characterized in that: Each pressurizing mechanism includes: The extrusion plate (36) is installed in an insulating gas box (3) with a sliding seal. Two running racks (5) are symmetrically installed at the top and bottom of one side of the extrusion plate (36). The two running racks (5) are respectively connected to the two pressurized pipes for power connection. Four guide columns (37) are arranged in a rectangular distribution in the insulating gas box (3), each guide column (37) is slidably passed through the extrusion plate (36), a plug is installed on the top of each guide column (37), and a return spring (38) is sleeved on the outside of each guide column (37), and the return spring (38) is arranged between the plug and the extrusion plate (36).

10. A gas-insulated switchgear for power grid according to claim 9, characterized in that: Each pressurizing mechanism also includes: A pressurized chamber (40) is provided in the insulating gas box (3), and the pressurized chamber (40) communicates with the alternating member through a pipeline; The second piston member (41) is slidingly and sealably mounted in the pressurizing chamber (40) and connected to the extrusion plate (36).

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