Cable chamber and high-voltage switch cabinet with same

Abstract

The utility model relates to a cable chamber, which is positioned below a gas tank, is communicated with a pressure relief channel, and comprises two side walls and a pressure relief channel, the bottom wall is used for connecting the two side walls; a front sealing plate; the rear sealing plate is provided with a plurality of pressure relief openings; the area of each flow guide plate is larger than the opening area of the corresponding pressure relief opening, and the flow guide plates are designed to be capable of acting between a first position where the pressure relief opening of the rear sealing plate is closed and a second position where the pressure relief opening of the rear sealing plate is opened. Therefore, the problem of small release area caused by small space of the cable chamber is effectively solved. The utility model also relates to a high-voltage switch cabinet with the high-voltage switch cabinet.

Description

Technical Field

[0001] The utility model relates to the technical field of high-voltage power distribution equipment, in particular to a high-voltage switch cabinet and a cable chamber for the same. Background Technique

[0002] A switch cabinet is an electrical device used to switch, control, and protect electrical equipment during the processes of power generation, transmission, distribution, and power conversion in a power system. It can also be called C-GIS or GIS. Here, the definition of GIS is: a metal-enclosed switchgear that uses all or part of a gas instead of air at atmospheric pressure as the insulating medium, also known as a gas-insulated switchgear. GIS is a high-voltage switch cabinet composed of a variety of high-voltage electrical appliances such as circuit breakers, busbars, disconnectors, earthing switches, voltage transformers, current transformers, lightning arresters, and bushings, and is fully called a fully insulated and fully enclosed metal switchgear.

[0003] During the operation of the switch cabinet, due to various reasons (such as short circuits, insulation aging, and human operation errors), a short-circuit fault may occur in the primary circuit. Under a short-circuit current of tens of thousands of amperes, high-temperature and high-pressure gases are generated instantaneously. If the high-temperature and high-pressure gases cannot be effectively released within a very short time in the narrow cabinet body, it will cause the switch cabinet to explode, damage adjacent switch cabinets, and may also endanger personal safety. Therefore, when designing the switch cabinet, an effective pressure relief structure is generally considered on the cabinet top. The cabinet door on the switch cabinet is an important protective device and plays an important role in protecting the internal equipment of the switch cabinet.

[0004] In this regard, Section 2.2.7 of the General Technical Specification for 12kV, 24kV, and 40.5kV High-Voltage Switch Cabinets of the State Grid Corporation of China (No.: 1016001003-0000-00) clearly stipulates that: the switch cabinet should be divided into metal-enclosed independent compartments such as a circuit breaker chamber, a busbar chamber, a cable chamber, and a control and instrument chamber, and independent pressure relief channels should be provided in the circuit breaker chamber, the busbar chamber, and the cable chamber. At the same time, Section 12.3.1.2 of the 18 Major Anti-Accident Measures for the Power Grid of the State Grid Corporation of China

[2012] No. 352 also stipulates that the switch cabinet should select products of IAC level (internal fault level), and the manufacturer should provide the corresponding type test report (with photos of the test samples attached to the report). When selecting a switch cabinet, it should be confirmed that its busbar chamber, circuit breaker chamber, and cable chamber are independent of each other and have all passed the corresponding internal arc burning tests. The allowable duration of the internal fault arc should not be less than 0.5 s for an arc burning time of 0.5 s and above, and the test current is the rated short-time withstand current. For products with a rated short-circuit breaking current of more than 31.5 kA, the internal fault arc test can be carried out according to 31.5 kA. The enclosed switch cabinet must be provided with a pressure release channel.

[0005] It can be seen that internal arc faults pose a great safety challenge to the operation of medium-voltage electrical products. The cable chamber of C-GIS integrates components such as current transformers, cables, and lightning arresters. The cable at the bottom of the cable chamber passes through the current transformer and is inserted into the cable chamber to form an electrical connection with the GIS; the lightning arrester is fixedly installed in front of the cable. The overall space of the cable chamber is narrow, which is not conducive to the release of arc fault pressure, bringing greater potential safety hazards to operation. The setting of the pressure relief channel and the pressure relief method are the key issues to be solved for the pressure release of the cable chamber.

[0006] As a solution, for example, reference can be made to the Chinese utility model patent publication specification with the publication number CN201957348U, which discloses an electrical cabinet with an explosion venting device. Specifically, it includes: a cabinet body 20 with an explosion vent 21 and an explosion venting device 22 including a rotating part 220 and a fixed part 221. When an arc ignition (not shown) occurs inside the cabinet body 20, the cabinet body 20 restricts the arc ignition channel 25 and discharges it towards the explosion vent 21. The rotating part 220 is connected to the cabinet body 20 through a pivot 23 and can rotate around the pivot 23. The fixed part 221 is fixedly connected to the cabinet body 20 through a fastener 24. Before the explosion venting occurs, the moving part 220 and the fixed part 221 are detachably connected and cover the explosion vent 21. By adopting the above structure, under the condition of meeting the explosion venting function, the explosion venting device can be processed by using the general sheet metal production method, avoiding the previously used molds and machining methods, and integrating the explosion venting device with the air duct, which can reduce costs and simplify the structure.

[0007] However, it is found in practice that there are the following deficiencies in setting the pivoting explosion venting device 22 in the air duct or flow channel:

[0008] 1. Since the explosion vent 21 and the explosion venting device 22 are set in the air duct or flow channel, the explosion vent is horizontally set in a way parallel to the ground. And because the air duct or flow channel is often narrow (for example, often about 200 millimeters), the pressure relief area of the explosion venting device 22 is insufficient, which affects the pressure release inside the electrical cabinet and is disadvantageous in the face of a large amount of gas leakage.

[0009] 2. The rotating part or the explosion vent plate of the explosion venting device 22 does not make full use of the space, thus exacerbating the defect of insufficient pressure relief area, and the opening amplitude of the rotating part is large, which is not conducive to quick opening during a fault.

[0010] 3. Since the explosion venting device 22 is located in the air duct, the arc ignition gas will impact the rear sealing plate of the switch cabinet or the cable chamber before entering the explosion venting device 22, and it is easy to be affected by arc ablation.

[0011] Therefore, in the related art, there is a technical need to improve the existing cable chamber or switchgear cabinet to solve the problems such as narrow post-pressure relief channels, insufficient pressure relief area, and too slow opening of pressure relief plates, and to meet the mandatory specifications at an acceptable low cost. Summary of the Invention

[0012] Therefore, the object of the present invention is to provide a cable chamber to overcome the above-mentioned disadvantages of the prior art.

[0013] According to one aspect of the present invention, there is provided a cable chamber adapted to be installed in a high-voltage switchgear cabinet with an air box and a pressure relief channel, wherein the cable chamber is located below the air box and is configured to communicate with the pressure relief channel. The cable chamber includes: two side walls extending parallel to each other at intervals in the front-rear direction of the high-voltage switchgear cabinet; a bottom wall for connecting the two side walls; a front sealing plate for connecting the two side walls and arranged adjacent to the front cabinet door of the high-voltage switchgear cabinet; a rear sealing plate for connecting the two side walls and arranged adjacent to the pressure relief channel of the high-voltage switchgear cabinet, wherein the rear sealing plate is provided with a plurality of pressure relief openings spaced apart from each other and capable of communicating with the pressure relief channel; and a plurality of elongated flow guiding plates pivotally mounted to the pressure relief openings respectively, wherein the area of the flow guiding plate is larger than the opening area of the corresponding pressure relief opening and is designed to be movable between a first position closing the pressure relief opening of the rear sealing plate and a second position opening the pressure relief opening of the rear sealing plate.

[0014] Different from the cable chambers in the prior art, in the present invention, by adding a plurality of flow guiding plates capable of single-side flipping pressure relief, the problem of small release area caused by the small space of the cable chamber is effectively solved. The flow guiding plate fits against the rear sealing plate under normal operating conditions, and when a fault occurs inside the cable chamber, the flow guiding plate is opened to release the pressure and gas inside the cable chamber. Since the flow guiding plate has a compact structure and a small single-piece area, it can be designed to be vertically installed and thus can be designed into multiple pieces. Since the flow guiding plate itself is light in weight and has a small opening amplitude, the pressure can be quickly discharged, and at the same time, the opening stroke meets the requirements of the pressure relief depth space.

[0015] As a preferred aspect of the present invention, the flow guiding plate is designed as an elongated thin plate member, including: a fixed connection portion located on one side, wherein the fixed connection portion is used for fixedly attaching to the rear sealing plate; a plurality of pivot portions arranged adjacent to the fixed connection portion, wherein the pivot portion is designed to be able to bend and deform when the gas pressure inside the cable chamber is greater than the gas pressure inside the pressure relief channel to switch the flow guiding plate from the first position to the second position.

[0016] As a preferred aspect of the present invention, the pivot portion is designed as a slit or a groove.

[0017] As a preferred aspect of the present utility model, a bending portion is further provided on one side of the flow guide plate away from the fixed connection portion and bends towards the pressure relief channel.

[0018] As a preferred aspect of the present utility model, the areas of the plurality of pressure relief openings are substantially the same and the areas of the plurality of flow guide plates are substantially the same.

[0019] As a preferred aspect of the present utility model, the area of the flow guide plate is 20% larger than the area of the pressure relief opening.

[0020] According to another aspect of the present invention, there is also provided a high-voltage switchgear, which includes a front cabinet panel, a rear cabinet panel, an air box, a cable chamber provided below the air box, and a pressure relief channel provided between the rear side of the air box and the cable chamber and the rear cabinet panel along the front-rear direction of the high-voltage switchgear, wherein the cable chamber is designed as the above-mentioned cable chamber.

[0021] As a preferred aspect of the present utility model, the high-voltage switchgear further includes a mechanism chamber located on the front side of the cable chamber along the front-rear direction of the high-voltage switchgear for accommodating an operating mechanism, and a low-voltage chamber is further provided above the mechanism chamber.

[0022] As a preferred aspect of the present utility model, the air box is designed as a box-shaped body composed of two intermediate plates, a first partition plate, a second partition plate, a top plate and a connecting plate, and fixing frames are fixedly installed on the inner sides of both intermediate plates, an installation plate is fixedly connected to the outer wall of the intermediate plate, three jacks are provided on the installation plate, and a bus connection inner cone sleeve is provided on the inner side of the intermediate plate close to the jacks.

[0023] Some of the other features and advantages of the present utility model will be apparent to those skilled in the art after reading this application, and the other part will be described in conjunction with the accompanying drawings in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Hereinafter, embodiments of the present utility model will be described in detail with reference to the accompanying drawings, wherein:

[0025] Figure 1 is a perspective view of an embodiment of the switchgear according to the present utility model, observed from the rear side perspective;

[0026] Figure 2 is Figure 1 the rear view of the switchgear in

[0027] Figure 3 is Figure 1 the side view of the switchgear in

[0028] Figure 4 is a perspective view of the cable chamber of the switchgear according to the present utility model;

[0029] Figure 5 is Figure 4 a top view of the cable compartment of the switchgear cabinet in

[0030] Figure 6 is Figure 4 a front view of the cable compartment of the switchgear cabinet in

[0031] Figure 7 is Figure 4 a perspective view of the cable compartment of the switchgear cabinet in , where the deflector is in an open state;

[0032] Figure 8 is Figure 7 a top view of the cable compartment of the switchgear cabinet in

[0033] Figure 9 is Figure 4 a front view of the cable compartment of the switchgear cabinet in , where the deflector is removed to better show the structure of the front sealing plate;

[0034] Figure 10 is a perspective view of the first embodiment of the deflector of the cable compartment according to the present utility model;

[0035] Figure 11 is a perspective view of the second embodiment of the deflector of the cable compartment according to the present utility model.

[0036] Explanation of reference numerals:

[0037] 100, switchgear cabinet; 10, cable compartment; 20, front cabinet panel; 30, rear cabinet panel;

[0038] 40, mechanism compartment; 50, low-voltage compartment; 60, gas box; 70, pressure relief channel;

[0039] 101, rear sealing plate; 101A, pressure relief port; 101B, connecting portion;

[0040] 102, deflector; 102A, fixed connection portion; 102B, pivot portion; 102C, bending portion;

[0041] 103, side wall; 104, cable seat; Detailed implementation manners

[0042] Now referring to the drawings, a schematic solution of the cable compartment disclosed by the present utility model will be described in detail. Although the drawings are provided to present some embodiments of the present utility model, the drawings do not necessarily need to be drawn according to the dimensions of the specific implementation manners, and some features may be enlarged, removed, or partially sectioned to better show and explain the disclosure of the present utility model. Some components in the drawings can be adjusted in position according to actual needs without affecting the technical effects. Phrases such as "in the drawings" or similar terms appearing in the specification do not necessarily refer to all the drawings or examples.

[0043] Certain directional terms used hereinafter to describe the accompanying drawings, such as "front", "rear", "inner", "outer", "above", "below" and other directional terms, will be understood to have their normal meanings and refer to those directions involved when normally viewing the accompanying drawings. Unless otherwise specified, the directional terms described in this specification are generally in accordance with the conventional directions understood by those skilled in the art.

[0044] The terms "first", "the first", "second", "the second" and their similar terms used in the present utility model do not represent any order, quantity or importance in the present utility model, but are used to distinguish one component from other components.

[0045] To further understand the purpose, structure, features and functions of the present utility model, it is described in detail below in conjunction with embodiments.

[0046] In Figures 1-3 a switchgear cabinet 100 according to the present utility model is shown, which includes a cabinet body that combines a circuit breaker, an operating mechanism, a disconnector, an earthing switch, a current transformer, a voltage transformer, a lightning arrester, and a busbar in a metal shell (the installation positions of each vacuum switch device in the switchgear cabinet are installed in the corresponding positions in the switchgear cabinet by those skilled in the art according to the knowledge they have and relevant specifications, so these electrical components are not all shown in the accompanying drawings of the specification of this application). Here, the switchgear cabinet taught in this embodiment can be used for a switch cabinet body generally in the shape of a thin cuboid or cube, in which the switch cabinet body is provided with a front cabinet panel 20 and a rear cabinet panel 30 at the front side or the rear side to allow an operator to approach electrical components such as a circuit breaker accommodated in the cabinet body. Here, these front cabinet panels 20 and rear cabinet panels 30 can be made of one of aluminized zinc plates, composite plates or non-metals. The material of the cabinet panel is preferably a solid insulating material, that is, an insulating paint or insulating glue is coated on the outer surface of the plate body, and it can be combined into a GIS switchgear cabinet that can be applied to 10 to 40.5 KV, so that the switchgear cabinet in the present utility model uses a low-pressure gas insulating medium, a solid insulating material and a specific insulating structure to seal or metal-enclose high-voltage conductors or high-voltage components, meeting the requirements of withstanding the rated insulation level.

[0047] As an example, the gas-insulated switchgear combination electrical appliance for the switchgear cabinet 100 of the present utility model can select vacuum switch devices, including a circuit breaker, an earthing switch, and a disconnector. In this way, the current breaking function of SF6 gas can be replaced by a vacuum interrupter (VI,), and an environmentally friendly SF6 alternative gas is selected for the insulating function of SF6 gas. The insulating gas is only responsible for the insulation outside the vacuum interrupter and inside the tank body of the switchgear combination electrical appliance, and does not participate in the current breaking and arcing processes. The operations of current breaking, earthing, quick earthing, isolation, etc. are all completed by vacuum interrupters with different functions.

[0048] If Figure 1 As shown, a mechanism chamber 40 for accommodating an operating mechanism is provided near the front cabinet plate 20, wherein the operating mechanism, the circuit breaker functionally connected to the operating mechanism, the circuit breaker switch, and the first and second busbars electrically connected to the circuit breaker switch are installed in the space formed by the mechanism chamber 40, the cable chamber 10 described in detail below, and the gas box 60. As an example, the circuit breaker switch, the first and second busbars connected to the circuit breaker switch 15 can be arranged in the internal space of the gas box 60.

[0049] Here, as an example, the gas box 60 can be a box-shaped body composed of two middle plates, a first partition plate, a second partition plate, a top plate and a connecting plate, and the inner sides of the two middle plates are fixedly installed with fixing frames, the outer wall of the middle plate is fixedly connected with a mounting plate, the mounting plate is provided with three plug holes, and the inner side of the middle plate near the plug holes is provided with a busbar connection inner cone bushing. Here, the busbar connection inner cone bushing is the main transition insulation element for the conductor to enter and lead out of the switchgear on the gas-insulated metal-enclosed switchgear, and its insulation performance directly affects the performance, operation reliability and personal safety of the gas-insulated metal-enclosed switchgear. As a non-limiting example, the busbar connection inner cone bushing (also called busbar connection insulator) used in the switch cabinet 100 in this embodiment has an insulator with a frustum-shaped outer surface and inner cavity. This inner cone insulator with a frustum-shaped outer surface is suitable for sulfur hexafluoride gas insulated switch cabinets because the insulation performance of sulfur hexafluoride gas is higher than that of dry compressed air. Therefore, when a gas with good insulation and arc extinguishing performance (generally sulfur hexafluoride SF6) is used as an insulation measure between phases and to the ground, the GIS switch cabinet in this application is suitable for high-voltage and high-capacity power grids for distribution and control.

[0050] If Figure 1 and 3 As better shown, a low-voltage chamber 50 is provided above the mechanism chamber 40. The low-voltage chamber 50 is composed of an openable low-voltage chamber door and four side panels distributed on the upper side, both end sides and the rear side. One end of the low-voltage chamber is hingedly connected to one of the side panels to facilitate the free opening and closing of the low-voltage chamber door. Optionally, a top busbar chamber can be added above the low-voltage chamber 50.

[0051] Furthermore, if Figure 1 and 3 As shown in , a cable chamber 10 is provided behind the mechanism chamber 40 and below the gas box 60, which is used to arrange the cables in the switch cabinet. The cables can be electrically connected to the circuit breaker in the gas box 60 by means of a device such as an inner cone socket located at the upper part of the cable chamber 10. Here, as Figure 1 and 3As shown in the figure, the air box 60 and the cable chamber 10 are designed to be generally flush in the front-rear direction of the switchgear cabinet 100. In particular, the rear side of the air box 60 is flush with the rear side of the cable chamber 10. Thus, a pressure relief channel 70 is formed between the air box 60, the cable chamber 10, and the rear cabinet panel 30 of the switchgear cabinet 100 in the front-rear direction. As described below, the pressure relief channel 70 is connected to either the air box 60 or the cable chamber 10. Here, the pressure relief channel 70 extends along the height direction or the vertical direction within the switchgear cabinet 100, and its cross-section can be arranged in a square shape with a side length of generally more than 220 millimeters, so as to release, in case of an abnormal situation, such as a fault arc or an explosive gas, from the top of the switchgear cabinet 100 to the outside of the cabinet. Here, preferably, no electrical components or wiring are installed in the pressure relief channel 70 to facilitate the smooth flow of air during abnormal situations.

[0052] Next, with the help of Figures 4-11 to describe in detail the cable chamber 10 according to the present utility model. As Figure 4 shown, the cable chamber 10 includes two side walls 103 that extend parallel to and spaced from each other generally in the front-rear direction, a bottom wall fixedly connected to the two side walls 103, a front sealing plate for connecting the two side walls 103 and closer to the front cabinet door 20, and a rear sealing plate 101 for connecting the two side walls 103 and closer to the rear cabinet door 30 (adjacent to the pressure relief channel 70) (as Figure 4 shown in the figure). As Figure 5 shown, a chamber for laying cable lines is enclosed by the side walls 103, the bottom wall, the front sealing plate, and the rear sealing plate 101. Preferably, a cable seat 104 for passing the cable lines is provided in the bottom wall of the cable chamber 10. As Figure 9 best shown, a plurality of pressure relief openings 101A are provided at intervals in the middle part of the rear sealing plate 101. Here, preferably, there are 4 generally rectangular pressure relief openings 101A. On one side of the plurality of pressure relief openings 101A, a generally long-strip-shaped connecting portion 101B is arranged. The vertical height of the connecting portion 101B is generally the same as the height of the pressure relief openings 101A. As a feasible example, here, the connecting portion 101B can be a plurality of mounting holes arranged in sequence along the height direction.

[0053] In order to control the controlled communication between the cable chamber 10 and the pressure relief channel 70 through the rear sealing plate 101, so as to allow the release of a fault arc or an explosive gas in the cable chamber 10 to the pressure relief channel 70 when they exist, and preferably also prevent the excessive fault arc or explosive gas generated in the air box 60 from flowing back into the cable chamber 10 through the pressure relief channel 70, the cable chamber 10 further includes a plurality of guide plates 102 pivotally attached to the rear sealing plate 101. Specifically, as Figure 4 shown, these guide plates 102 are connected to the corresponding pressure relief openings 101A in a one-to-one correspondence.

[0054] In Figure 10 and Figure 11 two kinds of flow guiding plates 102 that can be used in this embodiment are respectively shown. In Figure 10 the flow guiding plate 102 shown is generally designed as an elongated thin plate member, and preferably can be made of a bending material such as an unsaturated polyester peeling fiber felt insulating board. A plurality of fixing parts 102A such as through holes are spaced apart on one side of the flow guiding plate 102, and a plurality of pivoting parts 102B such as slits or material weakening areas are arranged adjacent to these fixing parts 102A. Thus, the flow guiding plate 102 can be fixedly attached to the connecting part 101B of the rear sealing plate 101 by means of, for example, passing plastic bolts through the plurality of fixing parts 102A, and the flow guiding plate 102 as a thin plate member is allowed to switch between a first position for closing the pressure relief opening 101A of the rear sealing plate 101 and a second position for opening the pressure relief opening 101A of the rear sealing plate 101 by means of the plurality of pivoting parts 102B. Preferably, the area of the flow guiding plate 102 is slightly larger than the area of the pressure relief opening 101A, for example, more than 20% larger than it. Since the flow guiding plate 102 is designed to be elongated, only a limited opening space is required for a single flow guiding plate 102 to switch between the first position and the second position, which can be achieved by the pressure relief channel 70 between the rear sealing plate 101 and the rear cabinet door 30. Further, since the flow guiding plate 102 is vertically installed in the rear sealing plate 101 of the cable chamber 10, the pressure relief area of the cable chamber 10 can be increased in a limited space.

[0055] In Figure 11 another preferred embodiment of the flow guiding plate 102 is shown, and the difference between it and the flow guiding plate 102 shown in Figure 10 is only that a bending part 102C bent towards the pressure relief channel is further provided on the side away from the fixing part 102A. Such a design of the bending part 102C is believed to not only contribute to the sealing of the pressure relief opening 101A of the flow guiding plate 102 to the rear sealing plate 101, but also be beneficial to guiding the gas discharged through the flow guiding plate 102 and flowing into the pressure relief channel 70.

[0056] Next, the working process of the present utility model will be described in conjunction with the accompanying drawings:

[0057] As Figures 4-6As shown in the figure, during the normal operation of the switchgear cabinet 100, the flow guiding plate 102 is in the first position closing the pressure relief opening 101A of the rear sealing plate 101 (this can be achieved by designing the force characteristics of the pivoting part 102B, that is, the flow guiding plate 102 is default in the normally closed first position). Due to the fact that the area of the flow guiding plate 102 is slightly larger than that of the pressure relief opening 101A, an airtight seal of the cable chamber 10 can be achieved. At the same time, such a design can also prevent a large amount of gas from flowing back into the rear sealing plate 101 of the cable chamber 10 through the pressure relief channel 70 after a fault occurs in the gas tank 60, which may lead to the air pressure in the cable chamber 10 exceeding the bearing limit of the front sealing plate of the cable chamber (the structural strength of the sealing plate is limited), and finally causing the gas to break through the sealing plate and the front door of the cable chamber to be blown open or even fly off by the high-pressure air flow, endangering the safety of equipment and personnel.

[0058] As Figures 7-8 shown, when an arc flash occurs in the cable chamber 10 of the switchgear cabinet 100, a large amount of gas will be instantly generated in the cable chamber 10, which will in turn cause the air pressure in the cable chamber 10 to increase instantaneously. The pressure difference existing between the cable chamber 10 on both sides of the flow guiding plate 102 and the pressure relief channel 70 will apply a relatively large acting force to the flow guiding plate 102 to drive multiple flow guiding plates 102 to pivot and open towards the pressure relief channel 70 together about the pivoting part 102B. Since the weight and inertia of a single flow guiding plate 102 itself are limited, the flow guiding plate 102 can be flipped and opened quickly compared with the prior art. Further, since the opening of the flow guiding plate 102 is at a limited angle, that is, the opening angle is an acute angle. This makes the gas flowing out through the pressure relief opening 101A not directly rush towards the rear cabinet door of the switchgear cabinet 10, but contact the rear cabinet door of the switchgear cabinet 10 at a relatively large angle under the buffering action of the flow guiding plate 102, so that the rear cabinet door of the switchgear cabinet 10 is less affected by arc ablation.

[0059] As can be seen from the above, in this embodiment, by adding multiple flow guiding plates 102 that can be flipped and relieved on one side, the flow guiding plate 102 can be in the first position fitting the rear sealing plate 101 in the normal operation state to form a closed cable chamber 10 that meets the cabinet internal protection level IP2X. When a fault occurs inside the cable chamber 10, the high-strength gas and pressure will flush the flow guiding plate 102 for pressure relief to the second position to release the pressure and gas inside the cable chamber 10. Further, the flow guiding plates 102 in the cable chamber 10 can be installed in a combined manner and are convenient for maintenance. The plugging of the cable is achieved by opening the rear interval of the cable chamber.

[0060] Meanwhile, the flow guiding plate 102 in the present utility model has a compact structure and a small single-piece area. Since it is optimized to be vertically installed, multiple pieces can be designed. Since the flow guiding plate 102 is light in its own weight and has a small opening amplitude, the pressure can be quickly discharged, and at the same time, the opening stroke meets the requirement of the pressure relief depth space, solving the problem of small release area caused by the small space in the cable chamber.

[0061] And the flow guiding plate 102 is designed to quickly flip to one side. It is provided with a long slot or a slit on one side and fixed with plastic bolts on the other side. The long slot or the slit is quickly folded under force, and the speed at which the plastic bolts are disengaged from the metal plate under force can be increased by more than half compared with that of using steel bolts, which is beneficial to the quick opening of the pressure relief flow guiding plate.

[0062] It should be understood that although this specification is described according to each embodiment, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A cable room, which is suitable for housing a high-voltage switch cabinet with an air box and a pressure relief channel, wherein the cable room is located below the air box and is configured to communicate with the pressure relief channel, and is characterized in that: The cable compartment includes: Two side walls extending parallel to each other and spaced apart from each other substantially along the front-to-rear direction of the high-voltage switch cabinet; A bottom wall for connecting two side walls; A front cover plate used to connect two side walls and arranged adjacent to the front door of the high-voltage switchgear; A rear sealing plate for connecting two side walls and arranged adjacent to a pressure relief channel of a high-voltage switch cabinet, wherein the rear sealing plate has a plurality of pressure relief ports arranged at intervals from each other and capable of communicating with the pressure relief channel; And a plurality of elongated guide plates each pivotally mounted to the pressure relief port, wherein the area of ​​the guide plates is larger than the opening area of ​​the corresponding pressure relief port and is designed to be able to move between a first position of the pressure relief port with the rear sealing plate closed and a second position of the pressure relief port with the rear sealing plate open.

2. The cable chamber according to claim 1, characterized in that: The guide plate is designed as an elongated thin plate, comprising: a fixing portion located on one side, wherein the fixing portion is used to be fixedly attached to the rear cover plate; A plurality of pivoting parts are arranged adjacent to the fixing part, wherein the pivoting parts are designed to be able to bend and deform when the gas pressure in the cable chamber is greater than the gas pressure in the pressure relief channel to switch the guide plate from the first position to the second position.

3. The cable chamber according to claim 2, characterized in that: The pivoting portion is designed as a slit or a groove.

4. The cable chamber according to claim 2 or 3, characterized in that: The guide plate is further provided with a bending portion on a side away from the fixing portion, the bending portion being bent toward the pressure relief channel.

5. The cable chamber according to claim 1, characterized in that: The areas of the plurality of pressure relief ports are substantially the same and the areas of the plurality of guide plates are substantially the same.

6. The cable chamber according to claim 1, characterized in that: The area of ​​the guide plate is 20% larger than the area of ​​the pressure relief port.

7. A high-voltage switch cabinet, comprising a front cabinet plate, a rear cabinet plate, an air box, a cable chamber arranged below the air box, and a pressure relief passage arranged between the rear sides of the air box and the cable chamber and the rear cabinet plate along the front-to-back direction of the high-voltage switch cabinet, characterized in that: The cable chamber is designed as the cable chamber as claimed in any one of claims 1 to 6.

8. The high voltage switch cabinet according to claim 7, characterized in that: The high-voltage switch cabinet further comprises a mechanism chamber located at the front side of the cable chamber along the front-rear direction of the high-voltage switch cabinet and used to accommodate an operating mechanism, wherein a low-voltage chamber is further arranged above the mechanism chamber.

9. The high voltage switch cabinet according to claim 7, characterized in that: The air box is designed as a box-shaped body consisting of two middle plates, a first partition, a second partition, a top plate and a connecting plate, and the inner sides of the two middle plates are fixedly installed with fixing frames, the outer walls of the middle plates are fixedly connected with mounting plates, the mounting plates are provided with three sockets, and the inner side of the middle plates near the sockets is provided with a busbar connecting inner cone sleeve.

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