Compact type environment-friendly gas ring main unit

Abstract

The invention discloses a compact environment-friendly gas ring network box, and relates to the technical field of power supply insulation protection equipment, the compact environment-friendly gas ring network box comprises a gas box, a switch frame, an insulator, a main switch, an isolation switch and a grounding bar, the switch frame is fixedly arranged in the gas box, and the insulator, the main switch, the isolation switch and the grounding bar are all arranged in the switch frame; the main switch comprises an insulation shell, a wire inlet end and a wire outlet end, the isolation switch comprises an insulation main shaft, an inclined support and a first isolation blade, the insulation main shaft is fixedly installed at the lower frame edge of the switch frame, the insulator is connected with the insulation main shaft in the horizontal direction, and the top end of the inclined support obliquely extends upwards to the bottom wall of the insulation shell; according to the ring main unit, the size of the air box can be further reduced on the basis of the prior art, the layout of basic components in the air box is more compact, and meanwhile the structural stability of the ring main unit is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power supply insulation protection equipment, and particularly to a compact environmental protection gas ring main unit box. Background Art

[0002] A ring main unit box is an electrical equipment unit that installs high-voltage switchgear in a steel plate metal cabinet or an assembled compartment structure, and is widely used in power supply systems. It has the advantages of simple structure, compact volume, low cost, etc., and can significantly improve power supply parameters, equipment performance and power supply safety. According to different insulating media, ring main unit boxes can be mainly divided into two categories: gas-insulated ring main unit boxes and solid-insulated ring main unit boxes. In the prior art, gas-insulated ring main unit boxes usually use SF6 gas as the insulating medium. Due to its excellent insulating performance and stability, SF6 gas is widely used in high-voltage electrical equipment. However, SF6 is recognized as one of the greenhouse effect gases, and its impact on the environment has attracted wide attention. More seriously, during the arc discharge process, SF6 gas will decompose to produce some toxic low fluoride gases, further exacerbating its environmental hazards. Therefore, reducing or even completely avoiding the use of SF6 gas and gradually replacing it with other more environmentally friendly gases, such as dry air or nitrogen, has become an important development trend in the field of power distribution switchgear manufacturing. By using these alternative gases, not only can the negative impact on the environment be effectively reduced, but also it can ensure that the electrical equipment meets the requirements of sustainable development and environmental protection while providing reliable insulating performance.

[0003] For example, a Chinese patent with the application number 201510548213.2 discloses an environmentally friendly gas-insulated ring main unit cabinet, which includes a completely sealed gas box. The gas box includes at least one three-phase high-voltage vacuum switch unit, and at least one three-phase high-voltage vacuum switch unit is arranged in the gas box; wherein, the three-phase high-voltage vacuum switch unit includes a switch frame, an insulator and a disconnector. The insulator and the disconnector are both arranged in the switch frame and fixedly connected to the switch frame. The disconnector is fixed on the insulator; the disconnector includes an insulating main shaft, and the insulating main shaft is an assembled insulating main shaft, including three identical main shaft bodies. Each of the three main shaft bodies is provided with an isolating blade, an isolating knife seat, a positioning plate and two side plates; and the three-phase high-voltage vacuum switch unit includes a main switch. The main switch is arranged in the switch frame and fixedly connected to the switch frame. The top end of the isolating blade of the disconnector can touch the outgoing line end of the main switch. In this patent, by using the isolating blade as the moving contact of the disconnector, it will rotate with the rotation of the insulating main shaft. The rotation of the insulating main shaft drives the isolating blade to act. The isolating blade turns from the outgoing line end of the main switch to the middle position between the outgoing line end and the grounding bus, and then turns to the grounding bus, that is, the closing, opening and grounding transitions of the disconnector are completed.

[0004] At present, the size of the isolating switch affects the performance of the ring network box mainly in the following aspects: 1. Electrical performance: The size of the isolating switch directly affects its current carrying capacity and the level of withstand voltage. If the size is too small, the current carrying capacity may be insufficient and the risk of overheating may be increased. 2. Mechanical strength: The isolating switch needs to withstand mechanical stress during operation. If the size is too small, the mechanical strength may be insufficient, increasing the risk of breakage or damage. 3. Arc extinguishing ability: The size and design of the isolating switch affect its arc extinguishing performance. If the size is too small, the arc extinguishing ability may be insufficient, the arc duration may be increased, and the safety of the equipment may be affected.

[0005] Therefore, from the above content, it can be known that the size of the disconnector is adapted to the volume of the ring network box. Since the size of the disconnector has a certain influence on the performance of the ring network box, when the volume of the ring network box is compact, it is necessary to make the disconnector as small as possible to adapt to the size of the ring network box, but it is necessary to ensure that the small-sized disconnector does not affect its normal arc extinguishing performance in the ring network box. In other words, the size design of the disconnector is designed after electric shock experiments under the corresponding volume of the ring network box. If the size of the disconnector is lower than the minimum size, the current carrying capacity of the disconnector is insufficient, which may easily lead to unstable insulation performance inside the ring network box and reduce the safety performance of the equipment. Therefore, the premise is that the structural layout must be based on the situation that the size of the disconnector remains unchanged.

[0006] In summary, how to maximize the use of the limited space of the ring network box to enhance the overall structural stability of the ring network box, reduce unnecessary gaps and moving parts, and improve its earthquake and impact resistance without sacrificing the basic functions and basic component sizes of the ring network box has become a technical problem that needs to be solved in the current ring network box design. This is especially important for ring network boxes working in harsh environments (such as earthquake-prone areas or underground facilities).

[0007] After research, the inventor found that in the above-mentioned related technology, the insulating main shaft rotates to drive the isolation blade from closing to grounding. Since the movement path of the isolation blade in the air box is a circular path, it is necessary to reserve a large gap area in the height direction of the air box for the movement of the isolation blade to facilitate the normal rotation of the isolation blade in this area. However, this will still make the volume occupied by the gap area in the air box large, that is, the manufacturing volume of the air box becomes larger, and ultimately the compactness of the ring network box is still not high, which is not conducive to improving the structural stability of the ring network box. Summary of the invention

[0008] The present invention discloses a compact environmentally friendly gas ring network box. While the dimensions of basic components in the existing ring network box remain unchanged and the basic functions are not affected, the manufacturing volume of the gas box is further reduced by optimizing the structural design of the components in the gas box, so as to solve the technical problem that the compactness of the ring network box in the related art is still not high.

[0009] To solve the above problems, the present invention adopts the following technical solutions: A compact environmentally friendly gas ring main cabinet, comprising: a gas cabinet, a switch frame, an insulator, a main switch, a disconnector and a grounding bar. The switch frame is fixedly arranged inside the gas cabinet, and the insulator, the main switch, the disconnector and the grounding bar are all arranged inside the switch frame. Among them, the main switch is located diagonally above the disconnector, the insulator is located on the horizontal side of the disconnector, and the grounding bar is located on the other horizontal side of the disconnector; the main switch includes an insulating housing, an incoming line end and an outgoing line end. The incoming line end is arranged at the top wall of the insulating housing, and the outgoing line end is arranged at the bottom wall of the insulating housing; the disconnector includes an insulating main shaft, an inclined bracket and a first isolating blade. The insulating main shaft is fixedly installed at the lower frame edge of the switch frame, and the insulator is connected to the insulating main shaft in the horizontal direction. The top end of the inclined bracket extends obliquely upward to the bottom wall of the insulating housing and is located on the horizontal side of the outgoing line end. The first isolating blade is rotatably arranged on the inclined bracket and can be retracted into the inclined bracket. The rotating part of the first isolating blade and the inclined bracket is located at the top end of the inclined bracket.

[0010] Optionally, a support assembly is arranged inside the inclined bracket. The support assembly includes a second isolating blade and a cylinder body. One end of the second isolating blade is connected to the insulator, and the other end passes through the insulating main shaft and extends along the length direction of the inclined bracket to the inner top wall of the inclined bracket. The cylinder body is arranged at the end of the second isolating blade far from the insulator; a rotating rod is arranged at one end of the first isolating blade close to the inclined bracket. The shape formed by the rotating rod and the first isolating blade is "L". The inside of the cylinder body is hollow and both ends are open. The rotating rod is rotatably inserted into the cylinder body so that the first isolating blade rotates relative to the second isolating blade.

[0011] Optionally, a rubber ring sleeve is embedded between the inner wall of the cylinder body and the outer peripheral wall of the rotating rod to increase the frictional resistance when the rotating rod rotates relative to the cylinder body.

[0012] Optionally, the rod section of the rotating rod far from the first isolating blade is configured as a screw rod, and a threaded head is threadedly sleeved on the screw rod. The outer diameter of the threaded head is larger than the inner diameter of the cylinder body.

[0013] Optionally, a sleeve is arranged on the outer periphery of the first isolating blade where the rotating rod is located. The inner diameter of the sleeve is adapted to the outer diameter of the cylinder body so that the inner wall of the sleeve rotates and fits on the outer wall of the cylinder body; The sleeve, the first isolating blade, the cylinder body and the second isolating blade are all made of metal conductive materials.

[0014] Optionally, the angle at which the diagonal bracket extends obliquely upward is 45°.

[0015] Optionally, it further includes a positioning component, and a set of the positioning components are respectively provided on the bottom wall of the insulating housing and the side frame of the switch frame; wherein, the positioning component provided on the bottom wall of the insulating housing is used to automatically press the first isolating blade against the current position when the first isolating blade rotates to the horizontal state, and the positioning component provided on the side frame of the switch frame is used to automatically press the first isolating blade against the current position when the first isolating blade rotates to the vertical state.

[0016] Optionally, the positioning component includes a positioning frame body and an insulating rubber part. The shape of the positioning frame body is U-shaped, and the open end of the positioning frame body can allow the first isolating blade to enter; the insulating rubber part is provided on the two inner side walls of the positioning frame body. When the first isolating blade is in the horizontal state or the vertical state, the insulating rubber part abuts against both sides of the first isolating blade.

[0017] Optionally, the insulating rubber part has a guiding sub-part, an abutting sub-part, and an avoiding sub-part. The guiding sub-part is located on the inner side wall of the positioning frame body near the open end, and the guiding sub-part has an inclined guiding surface. Along the direction perpendicular to the open direction of the positioning frame body, the distance between the inclined guiding surfaces on the opposite two groups of guiding sub-parts gradually decreases; the abutting sub-part is located on the side of the guiding sub-part away from the positioning frame body, and the abutting sub-part has an arc-shaped protruding surface, and the arc-shaped protruding surface is used to abut against the side wall of the first isolating blade; the avoiding sub-part is located on the side of the abutting sub-part away from the guiding sub-part. When the first isolating blade is in the horizontal state or the vertical state and abuts against the abutting sub-part, an avoiding gap is left between the avoiding sub-part and the first isolating blade for the environmental protection gas in the gas tank to enter.

[0018] Optionally, a limiting part extending directly towards the open end side of the positioning frame body is provided on the inner end wall of the positioning frame body. Along the direction from the inner end wall of the positioning frame body to the open end of the positioning frame body, the thickness of the limiting part gradually decreases to reserve the avoiding gap; one end of the limiting part away from the inner end wall of the positioning frame body is configured as a chamfered fitting surface. When the first isolating blade is in the horizontal state or the vertical state and abuts against the abutting sub-part, the chamfered fitting surface abuts against the end wall of the first isolating blade.

[0019] The technical solution adopted by the present invention can achieve the following beneficial effects: 1. When the disconnector switches states, there are at least the following switching situations: 1. Switching from the closed state or the grounded state to the open state: The first isolating blade rotates around the rotating part from the horizontal state or the vertical state and finally rotates into the inclined bracket, and the insulating main shaft always remains stationary; 2. Switching from the open state to the closed state or the grounded state: The first isolating blade moves out of the inclined bracket and rotates around the rotating part, and finally rotates to the horizontal state or the vertical state, and the insulating main shaft always remains stationary. During the process of each state switch, it is the first isolating blade that rotates independently rather than the insulating main shaft driving the inclined bracket to rotate. At the same time, since the rotating part of the first isolating blade and the inclined bracket is always at the top of the inclined bracket, the blade body of the first isolating blade always avoids the frame edge of the switch frame and the bottom wall of the insulating housing during the rotation process. In this case, compared with the existing ring main unit, the ring main unit of the present application can completely cancel the clearance space between the top of the inclined bracket and the bottom wall of the insulating housing, that is, the inclined bracket can be moved up by a certain distance so that the top of the inclined bracket is close to the bottom wall of the insulating housing and is located on the horizontal side of the outgoing line end. The insulator and the grounding bus can also be moved up correspondingly, and the length of the switch frame in the height direction can also be shortened correspondingly, so that the height of the entire gas tank is correspondingly reduced, and the volume design of the gas tank can be made smaller. After such a layout, the first isolating blade can still rotate on the basis of reducing the internal space of the gas tank to achieve the purpose of normal state switching. At the same time, since the clearance space between the top of the inclined bracket and the bottom wall of the insulating housing is cancelled, the height of the gas tank can be further shortened compared with the gas tank in the prior art. At this time, the volume of the gas tank is further reduced compared with the gas tank in the prior art, thereby making the design of the entire gas tank more compact, which is beneficial to improving the structural stability of the ring main unit and indirectly improving its seismic and impact resistance capabilities; 2. In the present application, the advantage of only rotating the first isolating blade when the disconnector switches states is that: compared with the situation in the prior art where the insulating main shaft, the inclined bracket and the first isolating blade all rotate together when the disconnector switches states, in the present application, only rotating the first isolating blade can achieve the state switching of the disconnector. In this way, the service life of the disconnector can be improved. That is, in the present application, when the disconnector switches states, the insulating main shaft and the inclined bracket do not need to rotate, thereby effectively reducing the possibility of damage to the insulating main shaft and the inclined bracket. At the same time, only the first isolating blade needs to rotate, so that the void volume occupied during its rotation can be effectively reduced, thereby effectively improving the structural stability of the ring main unit and making the operation more flexible; 3. In the prior art, if the overall volume of the air tank is relatively reduced, the size of the corresponding disconnector also needs to be correspondingly reduced in design so that the size of the disconnector can match the correspondingly reduced air tank. However, in this application, through reasonable structural layout and design, the disconnector actually increases its own size when the volume of the air tank is reduced, which is specifically reflected in the first isolating blade of the disconnector: the first isolating blade and the second isolating blade form a relatively rotatable path, and the actual path of this current is the sum of the length of the first isolating blade and the length of the second isolating blade. Therefore, the sum of the first isolating blade and the second isolating blade is longer than the overall length of the isolating blade in the prior art. In this way, when the volume of the ring main unit box is reduced, the entire disconnector can correspondingly increase the length of the isolating blade through the reasonable structural layout of this application, thereby correspondingly improving the current-carrying capacity, withstand voltage level, mechanical strength, and arc extinguishing ability of the disconnector, rather than sacrificing the size and corresponding performance of the disconnector to adapt to the reduced ring main unit box as in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0021] Figure 1 is a schematic structural diagram after hiding one end wall of the air tank in the embodiment of the present application; Figure 2 is a schematic structural diagram for showing the disconnector in the closed state in the embodiment of the present application; Figure 3 is a schematic structural diagram for showing the disconnector in the grounded state in the embodiment of the present application; Figure 4 is a schematic structural diagram after hiding one side wall of the air tank in the embodiment of the present application; Figure 5 is a partial connection schematic diagram for showing the insulator, the insulating main shaft, and the disconnector in the embodiment of the present application; Figure 6 is a partial schematic diagram for showing the rotating part of the first isolating blade and the diagonal bracket in the embodiment of the present application; Figure 7 is a partial schematic diagram for showing the positioning component in the embodiment of the present application Figure 1 ; Figure 8 is a partial schematic diagram for showing the positioning component in the embodiment of the present application Figure 2 .

[0022] In the figure: 1. Gas box; 2. Switch frame; 3. Insulator; 4. Main switch; 41. Insulating housing; 42. Inlet terminal; 43. Outlet terminal; 5. Disconnector switch; 51. Insulating main shaft; 52. Oblique bracket; 520. Support assembly; 521. Second isolating blade; 522. Cylinder; 53. First isolating blade; 531. Rotating rod; 532. Threaded head; 533. Sleeve; 6. Rubber ring sleeve; 7. Positioning assembly; 71. Positioning frame; 72. Insulating rubber part; 721. Guide sub - part; 7211. Inclined guide surface; 722. Contact sub - part; 7221. Arc - shaped protruding surface; 723. Avoidance sub - part; 8. Avoidance gap; 9. Limiting part; 10. Earthing busbar. Detailed implementation manners

[0023] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other implementation manners obtained by those of ordinary skill in the art without creative efforts belong to the scope protected by the present invention.

[0024] The terms "first", "second", etc. in the description and claims of this application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances so that the embodiments of this application can be implemented in an order different from those illustrated or described here, and the objects distinguished by "first", "second", etc. are usually of the same type, and do not limit the number of objects. For example, the first object can be one or multiple. In addition, "and / or" in the description and claims means at least one of the connected objects, and the character " / " generally represents an "or" relationship between the associated objects before and after.

[0025] The following combines the attached Figures 1 to 8 drawings, and through specific embodiments and their application scenarios, a compact environmentally friendly gas ring main switchgear provided by this application is described in detail.

[0026] A compact environmentally friendly gas ring main switchgear, combined with Figure 1 、 Figure 2 and Figure 3 , includes a gas box 1, a switch frame 2, an insulator 3, a main switch 4, a disconnector switch 5 and an earthing busbar 10. The switch frame 2 is fixedly arranged in the gas box 1, and the insulator 3, the main switch 4, the disconnector switch 5 and the earthing busbar 10 are all arranged in the switch frame 2. Among them, the main switch 4 is located diagonally above the disconnector switch 5, the insulator 3 is located on the horizontal side of the disconnector switch 5, and the earthing busbar 10 is located on the other horizontal side of the disconnector switch 5.

[0027] Exemplarily, the main switch 4 includes an insulating housing 41, an incoming line terminal 42 and an outgoing line terminal 43. The incoming line terminal 42 is arranged at the top wall of the insulating housing 41, and the outgoing line terminal 43 is arranged at the bottom wall of the insulating housing 41. Further, both the incoming line terminal 42 and the outgoing line terminal 43 are integrally provided with the insulating housing 41, and the incoming line terminal 42 is vertically upward and the outgoing line terminal 43 is vertically downward.

[0028] Meanwhile, the disconnecting switch 5 includes an insulating main shaft 51, an inclined bracket 52 and a first isolating blade 53. The insulating main shaft 51 is fixedly installed at the lower frame edge of the switch frame 2, and the insulator 3 is connected to the insulating main shaft 51 in the horizontal direction. The top end of the inclined bracket 52 extends obliquely upward to the bottom wall of the insulating housing 41 and is located on the horizontal side of the outgoing line terminal 43. The first isolating blade 53 is rotatably arranged on the inclined bracket 52 and can be received inside the inclined bracket 52. The rotating part of the first isolating blade 53 and the inclined bracket 52 is at the top end of the inclined bracket 52. Exemplarily, the shape of the first isolating blade 53 is a long strip-shaped straight line, and the length of the first isolating blade 53 is less than the extending length of the inclined bracket 52, so that the first isolating blade 53 can be received in the inclined bracket 52.

[0029] Exemplarily, when the disconnecting switch 5 is in the open state, the first isolating blade 53 is completely received inside the inclined bracket 52; during the process of the disconnecting switch 5 switching from the open state to the closed state, the first isolating blade 53 moves out of the inclined bracket 52 and rotates to the horizontal state, and the end of the first isolating blade 53 far from the rotating part contacts the outgoing line terminal 43. At the same time, the moving range of the first isolating blade 53 is configured to avoid the gap area between the inclined bracket 52 of the insulating housing 41 and the outgoing line terminal 43; during the process of the disconnecting switch 5 switching from the open state to the grounding state, the first isolating blade 53 moves out of the inclined bracket 52 and rotates to the vertical state and the end far from the rotating part contacts the grounding bus 10. At the same time, the moving range of the first isolating blade 53 is configured to avoid the gap area between the inclined bracket 52 of the side frame edge of the switch frame 2 and the grounding bus 10.

[0030] Further, the angle at which the inclined bracket 52 extends obliquely upward is 45°, so that the moving paths of the first isolating blade 53 when switching from the open state to the closed state or the grounding state are the same, thereby improving the switching convenience and controllability. Exemplarily, the inclined bracket 52 is configured as an insulating bracket, and this insulating bracket is made of insulating materials such as epoxy resin, polyester resin, ceramic materials, etc. In this way, the inclined bracket 52 can effectively insulate and protect the first isolating blade 53 inside it.

[0031] On this basis, when the disconnector 5 switches its state, there are at least the following several switching situations: 1. Switching from the closed state or the grounded state to the open state: The first isolating blade 53 rotates around the rotating part from the horizontal state or the vertical state and finally rotates into the inclined bracket 52, and the insulating main shaft 51 always remains stationary; 2. Switching from the open state to the closed state or the grounded state: The first isolating blade 53 moves out of the inclined bracket 52 and rotates around the rotating part, and finally rotates to the horizontal state or the vertical state, and the insulating main shaft 51 always remains stationary.

[0032] As can be seen from the above switching situations, during the switching process of each state, it is the first isolating blade 53 that rotates independently rather than the insulating main shaft 51 driving the inclined bracket 52 to rotate. At the same time, since the rotating part of the first isolating blade 53 and the inclined bracket 52 is always at the top of the inclined bracket 52, the blade body of the first isolating blade 53 always avoids the frame edge of the switch frame 2 and the bottom wall of the insulating housing 41 during the rotation process. In this case, compared with the existing ring main unit and when the sizes of the basic components in the gas tank 1 remain unchanged, the ring main unit of the present application can completely cancel the clearance space between the top of the inclined bracket 52 and the bottom wall of the insulating housing 41, that is, the inclined bracket 52 can be moved up a certain distance so that the top of the inclined bracket 52 is close to the bottom wall of the insulating housing 41 and is located on the horizontal side of the outgoing line terminal 43. At the same time, the insulator 3 and the grounding bus 10 are also moved up correspondingly, and the length of the switch frame 2 in the height direction can also be shortened correspondingly, so that the height of the entire gas tank 1 is correspondingly reduced, and the volume design of the gas tank 1 can become smaller. It should be noted that the basic components in the gas tank 1 refer to the switch frame 2, the insulator 3, the main switch 4, the disconnector 5, the grounding bus 10, etc. The sizes of these basic components have not changed compared with those in the prior art. Figures 1 to 3 The schematic diagrams of the basic components above are only for expressing their positions and do not represent the actual sizes. Therefore, the technical effects of the present application should not be compared based on sizes outside the prior art.

[0033] In summary, after such a layout, the first isolating blade 53 can still rotate on the basis of reducing the internal space of the gas tank 1 to achieve the purpose of normal state switching. At the same time, since the clearance space between the top of the inclined bracket 52 and the bottom wall of the insulating housing 41 is cancelled, the height of the gas tank 1 can be further shortened compared with the gas tank 1 in the prior art. At this time, the volume of the gas tank 1 is further reduced compared with the gas tank 1 in the prior art, thereby making the design of the entire gas tank 1 more compact, which is beneficial to improving the structural stability of the ring main unit and indirectly improving its seismic and impact resistance capabilities.

[0034] It should be noted that in this application, when the state of the disconnecting switch 5 is switched, the advantage of only rotating the first isolating blade 53 is that: compared with the prior art where when the state of the disconnecting switch 5 is switched, the insulating main shaft 51, the diagonal bracket 52, and the first isolating blade 53 all need to rotate together, in this application, only rotating the first isolating blade 53 can achieve the state switching of the disconnecting switch 5, so as to improve the service life of the disconnecting switch 5. That is, in this application, when the state of the disconnecting switch 5 is switched, the insulating main shaft 51 and the diagonal bracket 52 do not need to rotate, which can effectively reduce the possibility of damage to the insulating main shaft 51 and the diagonal bracket 52. At the same time, only the first isolating blade 53 needs to rotate, which can effectively reduce the gap volume occupied during its rotation, and thus effectively improve the structural stability of the ring main unit box.

[0035] In some embodiments, such as Figure 3 , Figure 5 and Figure 6 , a support assembly 520 is provided inside the diagonal bracket 52. The support assembly 520 includes a second isolating blade 521 and a cylinder 522. One end of the second isolating blade 521 is connected to the insulator 3, and the other end passes through the insulating main shaft 51 and extends along the length direction of the diagonal bracket 52 to the inner top wall of the diagonal bracket 52. The cylinder 522 is provided at the end of the second isolating blade 521 away from the insulator 3. Exemplarily, a hole for the second isolating blade 521 to pass through is provided on the surface of the insulating main shaft 51.

[0036] Exemplarily, a rotating rod 531 is provided at one end of the first isolating blade 53 close to the diagonal bracket 52. The shape formed by the rotating rod 531 and the first isolating blade 53 is "L". The inside of the cylinder 522 is hollow and both ends are open. The rotating rod 531 is rotatably inserted into the cylinder 522 so that the first isolating blade 53 rotates relative to the second isolating blade 521. That is, through the rotational cooperation between the rotating rod 531 and the second isolating blade 521, the first isolating blade 53 can rotate relative to the rotating rod 531, achieving the effect of enabling the first isolating blade 53 to rotate normally on the diagonal bracket 52. Exemplarily, a plurality of diagonal brackets 52 are provided along the length direction of the insulating main shaft 51. A first isolating blade 53 is rotatably provided corresponding to each diagonal bracket 52, and the plurality of first isolating blades 53 are connected together by a connecting shaft (not labeled in the figure). The connecting shaft is fixedly connected to each of the plurality of first isolating blades 53, and the connecting shaft (not labeled in the figure) is coaxially connected to the rotating rod 531. Further, in combination with Figure 4, the connecting shaft extends to the outside after passing through the side wall of the air box 1, and a sealing ring (not labeled in the figure) is embedded between the rotating gap of the connecting shaft and the side wall of the air box 1. At one end of the connecting shaft outside the air box 1, an adjusting disc (not labeled in the figure) is provided. By rotating the adjusting disc, the connecting shaft is rotated, thereby driving the plurality of first isolating blades 53 to rotate relative to the inclined bracket 52, so as to simultaneously switch the states of the plurality of disconnect switches 5.

[0037] In some embodiments, in combination with Figure 5 , Figure 6 , a rubber ring sleeve 6 is embedded between the inner wall of the cylinder body 522 and the outer peripheral wall of the rotating rod 531 to increase the frictional resistance when the rotating rod 531 rotates relative to the cylinder body 522. The purpose of setting the rubber ring sleeve 6 is to increase the rotational frictional force between the rotating rod 531 and the cylinder body 522, so that when the adjusting disc is not rotated, the first isolating blade 53 can stay at the current position due to the frictional resistance generated by the rubber ring sleeve 6, thereby effectively improving the controllability of the first isolating blade 53 and also improving the stability of the first isolating blade 53 in the switched-off state, switched-on state, and grounded state.

[0038] In some embodiments, in combination with Figure 5 , Figure 6 , the rod section of the rotating rod 531 away from the first isolating blade 53 is configured as a screw rod, and a threaded head 532 is sleeved on the screw rod. The outer diameter of the threaded head 532 is larger than the inner diameter of the cylinder body 522. The setting of the threaded head 532 can, to a certain extent, prevent relative displacement between the rotating rod 531 and the cylinder body 522, so that the rotating rod 531 can stably stay at the established position for relative rotation with the cylinder body 522.

[0039] Exemplarily, a sleeve 533 is provided on the outer periphery of the first isolating blade 53 where the rotating rod 531 is located. The inner diameter of the sleeve 533 is adapted to the outer diameter of the cylinder body 522, so that the inner wall of the sleeve 533 rotates and fits on the outer wall of the cylinder body 522; the sleeve 533, the first isolating blade 53, the cylinder body 522, and the second isolating blade 521 are all made of metal conductive materials. Further, the metal conductive material can be metal materials such as brass, aluminum, and copper, which have low cost and good electrical conductivity.

[0040] After being set like this, due to the setting of the rubber ring sleeve 6, there may be a situation where electrical conduction cannot be achieved between the rotating rod 531 and the cylinder body 522. That is, when the first isolating blade 53 is in contact with the outgoing line terminal 43, it is not easy for the insulator 3 to achieve electrical isolation protection in the closing state. Therefore, through the added sleeve 533, when the rotating rod 531 rotates relative to the cylinder body 522, the rotating rod 531 will synchronously drive the sleeve 533 to rotate. Since the sleeve 533 is in contact with the cylinder body 522 and both are made of metal conductive materials, the current flow path generated when the first isolating blade 53 is in contact with the outgoing line terminal 43 can be: outgoing line terminal 43 - first isolating blade 53 - sleeve 533 - cylinder body 522 - second isolating blade 521 - insulator 3. Therefore, through the above setting, the insulator 3 can still provide electrical isolation, ensuring that there is no electrical conduction between the high-voltage part at the first isolating blade 53 and other equipment or the grounded part, thereby effectively preventing electric shock or equipment short circuit, helping to prevent the current from flowing through other paths other than the above path, and reducing the leakage phenomenon caused by the failure or overcurrent of the ring main unit.

[0041] More importantly, the isolating blade in the prior art is actually equivalent to the second isolating blade 521 in the present application. On the basis of the second isolating blade 521, the present application adds the first isolating blade 53, and realizes the transformation of the closing, opening, and grounding of the disconnecting switch 5 by changing the position of the first isolating blade 53 through rotation. And through the design of the first isolating blade 53 plus the second isolating blade 521, the length is increased compared with the isolating blade in the prior art, so that the current-carrying capacity, voltage-withstanding level, mechanical strength, and arc-extinguishing ability of the disconnecting switch 5 in the present application are further improved compared with the disconnecting switch in the prior art. However, the volume of the gas tank 1 in the present application is reduced compared with the prior art. Therefore, through the above structural design and layout, on the basis of reducing the volume of the gas tank 1, through reasonable structural layout, the size of the disconnecting switch 5 can be designed to be increased (that is, the length of the first isolating blade 53 plus the second isolating blade 521). Furthermore, it is not necessary to sacrifice the electrical performance, mechanical strength, and arc-extinguishing ability of the disconnecting switch 5. Instead, compared with the prior art, the electrical performance, mechanical strength, and arc-extinguishing ability of the disconnecting switch 5 are increased, and the operation is more flexible. Finally, although the volume of the ring main unit in the present application is further reduced under the condition of being structurally compact, its safety and reliability are increased.

[0042] In some embodiments, in combination with Figure 2 、 Figure 3 and Figure 7, A compact environmental protection gas ring main cabinet of the present application further includes a positioning assembly 7, and a set of the positioning assembly 7 is respectively provided on the bottom wall of the insulating housing 41 and on the side frame of the switch frame 2; wherein, the positioning assembly 7 provided on the bottom wall of the insulating housing 41 is used to automatically press the first isolating blade 53 against the current position when the first isolating blade 53 rotates to the horizontal state, and the positioning assembly 7 provided on the side frame of the switch frame 2 is used to automatically press the first isolating blade 53 against the current position when the first isolating blade 53 rotates to the vertical state.

[0043] Exemplarily, the positioning assembly 7 includes a positioning frame body 71 and an insulating rubber part 72. The shape of the positioning frame body 71 is U-shaped, and the open end of the positioning frame body 71 is available for the first isolating blade 53 to enter. Exemplarily, the positioning frame body 71 is installed on the bottom wall of the insulating housing 41 or on the side frame of the switch frame 2 through a connecting bracket; further, the insulating rubber part 72 is provided on the two inner side walls of the positioning frame body 71. When the first isolating blade 53 is in the horizontal state or the vertical state, the insulating rubber part 72 abuts against both sides of the first isolating blade 53. After being arranged like this, through the abutment of the insulating rubber part 72, when the first isolating blade 53 is in the horizontal state or the vertical state, the position stability of the first isolating blade 53 in the current state can be further improved.

[0044] In some embodiments, referring to Figure 7 and Figure 8 , the insulating rubber part 72 has a guiding sub-part 721, an abutting sub-part 722 and an avoiding sub-part 723. The guiding sub-part 721 is located on the inner side wall of the positioning frame body 71 close to the open end, and the guiding sub-part 721 has an inclined guiding surface 7211. Along the direction perpendicular to the open direction of the positioning frame body 71, the distance between the inclined guiding surfaces 7211 on the opposite two groups of guiding sub-parts 721 gradually decreases. Further, in order to improve the guiding effect of the guiding sub-part 721, the two side walls of the positioning frame body 71 close to its own open end are also inclined surfaces, and the inclined surface is smoothly and adaptively transitionally matched with the inclined guiding surface 7211, so that the first isolating blade 53 can enter more smoothly.

[0045] Exemplarily, the abutting sub-part 722 is located on the side of the guiding sub-part 721 away from the positioning frame body 71, and the abutting sub-part 722 has an arc-shaped protruding surface 7221, and the arc-shaped protruding surface 7221 is used to abut against the side wall of the first isolating blade 53.

[0046] Exemplarily, the avoiding sub-part 723 is located on the side of the abutting sub-part 722 away from the guiding sub-part 721. When the first isolating blade 53 is in the horizontal state or the vertical state and abuts against the abutting sub-part 722, an avoiding gap 8 is left between the avoiding sub-part 723 and the first isolating blade 53 for the environmental protection gas in the gas cabinet 1 to enter.

[0047] On this basis, the guiding sub-parts 721 on the two inner side walls of the positioning frame 71 can effectively guide the first isolation blade 53 when the first isolation blade 53 is about to enter the positioning frame 71, so that the first isolation blade 53 is not easily offset by the thrust of the insulating rubber part 72 during the process of moving into the positioning frame 71, so that the first isolation blade 53 can be smoothly moved into the positioning frame 71 along a predetermined direction. At the same time, the arc-shaped protruding surface 7221 of the abutting sub-part 722 can reduce the contact area between the side wall of the first isolation blade 53 while abutting against the side wall of the first isolation blade 53, so that the first isolation blade 53 can improve the stability of the current position while effectively alleviating the situation that the contact area between the first isolation blade 53 and the insulating rubber part 72 is too large, which causes the local temperature to rise. Furthermore, the avoidance sub-portion 723 can avoid the first isolation blade 53 when the first isolation blade 53 is already in a predetermined position in the positioning frame 71, so that the first isolation blade 53 is abutted in the positioning frame 71, and an avoidance gap 8 is still reserved in the positioning frame 71. The avoidance gap 8 can allow the environmentally friendly gas in the gas box 1 to enter the positioning frame 71, thereby effectively reducing the possibility of local breakdown. At the same time, through the setting of the avoidance gap 8, the environmentally friendly gas can effectively flow in the avoidance gap 8, and then when the isolating switch 5 is in the closed state, the local temperature after the first isolation blade 53 and the insulating rubber part 72 are in contact is reduced, and ultimately the service life of the ring network box of the present application can be indirectly improved.

[0048] In some embodiments, in combination Figure 7 , Figure 8 A limiting portion 9 is provided on the inner end wall of the positioning frame 71 and extends directly toward the open end side of the positioning frame 71. The thickness of the limiting portion 9 gradually decreases along the direction from the inner end wall of the positioning frame 71 to the open end of the positioning frame 71 to reserve an avoidance gap 8; illustratively, one end of the limiting portion 9 away from the inner end wall of the positioning frame 71 is configured as a chamfered fitting surface, and when the first isolation blade 53 is in a horizontal state or a vertical state and abuts against the abutting sub-portion 722, the chamfered fitting surface abuts against the end wall of the first isolation blade 53. On this basis, through the setting of the limiting portion 9, it is possible to avoid, to a certain extent, the end wall of the first isolation blade 53 from being closely attached to the inner wall of the positioning frame 71 over a large area, so that most of the end wall of the first isolation blade 53 can be exposed in the avoidance gap 8, thereby allowing the environmentally friendly gas to fully contact the end wall of the first isolation blade 53 when flowing in the avoidance gap 8, and can also effectively reduce the fitting area of ​​the outer wall of the first isolation blade 53 and increase the exposed area, further slowing down the local temperature increase rate of the first isolation blade 53 when it is in the closed state.

[0049] It should be noted that, in this document, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or further includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the presence of additional identical elements in the process, method, article or device comprising such element.

[0050] In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in the reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, the features described with reference to certain examples may be combined in other examples.

[0051] As described above, the above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention can easily think of changes or substitutions, which should all be covered within the protection scope of the present invention.

Claims

1. A compact environmentally friendly gas ring network box, characterized in that: include: An air box (1), a switch frame (2), an insulator (3), a main switch (4), an isolating switch (5) and a grounding bar (10), wherein the switch frame (2) is fixedly arranged in the air box (1), and the insulator (3), the main switch (4), the isolating switch (5) and the grounding bar (10) are all arranged in the switch frame (2), wherein the main switch (4) is located obliquely above the isolating switch (5), the insulator (3) is located on one horizontal side of the isolating switch (5), and the grounding bar (10) is located on the other horizontal side of the isolating switch (5); The main switch (4) comprises an insulating housing (41), an inlet terminal (42) and an outlet terminal (43), wherein the inlet terminal (42) is arranged at the top wall of the insulating housing (41), and the outlet terminal (43) is arranged at the bottom wall of the insulating housing (41); The isolating switch (5) comprises an insulating main shaft (51), an oblique bracket (52) and a first isolating blade (53); the insulating main shaft (51) is fixedly mounted on the lower frame edge of the switch frame (2); the insulator (3) is connected to the insulating main shaft (51) in a horizontal direction; the top end of the oblique bracket (52) extends obliquely upward to the bottom wall of the insulating housing (41) and is located on a horizontal side of the outlet terminal (43); the first isolating blade (53) is rotatably arranged on the oblique bracket (52) and can be stored in the oblique bracket (52); and the rotating portion of the first isolating blade (53) and the oblique bracket (52) is located at the top end of the oblique bracket (52).

2. A compact environmentally friendly gas ring network box according to claim 1, characterized in that: A support assembly (520) is provided inside the oblique bracket (52), the support assembly (520) comprising a second isolation blade (521) and a barrel (522), one end of the second isolation blade (521) being connected to the insulator (3), and the other end of the second isolation blade (521) passing through the insulating main shaft (51) and extending along the length direction of the oblique bracket (52) to the inner top wall of the oblique bracket (52), the barrel (522) being provided at an end of the second isolation blade (521) away from the insulator (3); A rotating rod (531) is provided at one end of the first isolation blade (53) close to the oblique bracket (52); the rotating rod (531) and the first isolation blade (53) form an "L" shape; the interior of the cylinder (522) is hollow and both ends are open; the rotating rod (531) is rotatably inserted into the cylinder (522) so that the first isolation blade (53) rotates relative to the second isolation blade (521).

3. A compact environmentally friendly gas ring network box according to claim 2, characterized in that: A rubber ring (6) is embedded between the inner wall of the cylinder (522) and the outer peripheral wall of the rotating rod (531) to increase the friction resistance when the rotating rod (531) and the cylinder (522) rotate relative to each other.

4. A compact environmentally friendly gas ring network box according to claim 3, characterized in that: The rod section of the rotating rod (531) away from the first isolation blade (53) is configured as a screw rod, and a threaded sleeve on the screw rod is provided with a threaded head (532), and the outer diameter of the threaded head (532) is greater than the inner diameter of the barrel (522).

5. The compact environmentally friendly gas ring network box according to claim 3, characterized in that: A sleeve (533) is provided on the first isolation blade (53) at the outer periphery of the rotating rod (531), and the inner diameter of the sleeve (533) is adapted to the outer diameter of the cylinder (522), so that the inner wall of the sleeve (533) can be rotated to fit the outer wall of the cylinder (522); The sleeve (533), the first isolation blade (53), the cylinder (522) and the second isolation blade (521) are all made of metallic conductive material.

6. A compact environmentally friendly gas ring network box according to claim 1, characterized in that: The oblique bracket (52) extends upward at an angle of 45°.

7. A compact environmentally friendly gas ring network box according to any one of claims 1 to 6, characterized in that: It also includes a positioning assembly (7), wherein a group of the positioning assembly (7) is respectively provided on the bottom wall of the insulating housing (41) and on the side frame edge of the switch frame (2); wherein: The positioning assembly (7) disposed on the bottom wall of the insulating housing (41) is used to automatically press the first isolation blade (53) against the current position when the first isolation blade (53) rotates to a horizontal state, and the positioning assembly (7) disposed on the side frame of the switch frame (2) is used to automatically press the first isolation blade (53) against the current position when the first isolation blade (53) rotates to a vertical state.

8. A compact environmentally friendly gas ring network box according to claim 7, characterized in that: The positioning assembly (7) comprises a positioning frame (71) and an insulating rubber part (72); the positioning frame (71) is U-shaped, and an opening end of the positioning frame (71) allows the first isolation blade (53) to enter; The insulating rubber part (72) is arranged on two inner side walls of the positioning frame (71); when the first isolation blade (53) is in a horizontal state or a vertical state, the insulating rubber part (72) abuts against the first isolation blade (53) on two sides thereof.

9. A compact environmentally friendly gas ring network box according to claim 8, characterized in that: The insulating rubber portion (72) comprises a guiding sub-portion (721), an abutting sub-portion (722) and an avoiding sub-portion (723); the guiding sub-portion (721) is located on the inner side wall of the positioning frame (71) close to the opening end, and the guiding sub-portion (721) comprises an inclined guiding surface (7211); along a direction perpendicular to the opening of the positioning frame (71), the distance between the inclined guiding surfaces (7211) on two opposite groups of the guiding sub-portions (721) gradually decreases; The abutting sub-portion (722) is located on a side of the guiding sub-portion (721) away from the positioning frame (71), and the abutting sub-portion (722) has an arc-shaped protruding surface (7221), and the arc-shaped protruding surface (7221) is used to abut against a side wall of the first isolation blade (53); The avoidance sub-portion (723) is located on a side of the abutment sub-portion (722) away from the guiding sub-portion (721); when the first isolation blade (53) is in a horizontal state or a vertical state and abuts against the abutment sub-portion (722), an avoidance gap (8) is left between the avoidance sub-portion (723) and the first isolation blade (53) to allow environmentally friendly gas in the gas box (1) to enter.

10. A compact environmentally friendly gas ring network box according to claim 9, characterized in that: A limiting portion (9) is provided on the inner end wall of the positioning frame (71) and extends directly toward the open end of the positioning frame (71); the thickness of the limiting portion (9) gradually decreases along the direction from the inner end wall of the positioning frame (71) to the open end of the positioning frame (71) to reserve the avoidance gap (8); One end of the limiting portion (9) away from the inner end wall of the positioning frame (71) is configured as a chamfered fitting surface, and when the first isolation blade (53) is in a horizontal state or a vertical state and abuts against the abutting sub-portion (722), the chamfered fitting surface abuts against the end wall of the first isolation blade (53).

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