Internal visual ring main unit gas tank and assembly process thereof

Abstract

The invention provides an internal visual ring main unit gas tank and an assembly process thereof, the internal visual ring main unit gas tank is provided with a gas tank shell, the gas tank shell comprises a gas tank rear plate, the gas tank rear plate comprises a flange plate, an observation window, a perspective hole and a first stud, the first stud is arranged on the inner side surface of the gas tank rear plate and is located around the perspective hole, the flange plate is nested in the perspective hole, and the observation window is arranged on the flange plate. Second studs are arranged on the outer side face of the flange plate. The observation window is installed on the outer side face of the flange plate based on the second studs. The three-position switch is arranged in the air box shell, and the position of the perspective hole corresponds to the position of the three-position switch; and the illumination range of the multi-point-source distributed floodlight covers the three-position switch. According to the embodiment of the invention, the contact working condition between the contact knives can be effectively observed, the fixed-point visualization effect of all three-position switches is realized, the sealing performance of the observation window in the perspective hole is improved, and the air leakage phenomenon caused by the overlarge size of the observation window is prevented.

Description

Technical Field

[0001] The present application relates to the field of ring main unit, and in particular to a ring main unit gas box with internal visualization and an assembly process thereof. Background Art

[0002] At present, the existing ring main unit is mainly composed of gas insulated ring main unit and solid insulated ring main unit. Among them, gas insulated ring main unit includes SF6 gas insulated ring main unit, dry air environmental protection cabinet, nitrogen environmental protection cabinet, etc., which are widely used due to their good insulation performance, easy processing, low cost and other characteristics. Its internal three-position switch can realize the conversion of isolation / disconnection / grounding by swinging the moving contact knife, so as to meet different working conditions. However, in the process of swinging the moving contact knife, over-position or absence of position is prone to occur, which will reduce the contact area between the moving contact knife and the static contact knife or the moving contact knife and the grounding contact knife, thereby causing overheating of the contact area, which will cause great damage to the normal operation of the ring main unit, and is particularly common in the common box type ring main unit.

[0003] In the prior art, most of the gas boxes of the ring main unit are provided with an observation window on the front panel to observe the status of the internal switches. However, a variety of mechanical / electrical components such as circuit breaker mechanisms and isolation mechanisms need to be mounted on the front panel of the gas box, and the larger the observation window, the more likely it is to leak. As a result, the existing observation window is very small, and the position of the observation window needs to consider the placement of various components, making it impossible to effectively observe all switch states. At the same time, the interior of the ring main unit gas box at this stage is dark, and the staff needs to use a flashlight to observe through the observation window one by one, and thus cannot effectively observe the contact conditions between the contact knives, and cannot perform effective inspections, resulting in frequent failures of the ring main unit due to poor contact of the contact knives. Summary of the invention

[0004] The main purpose of the embodiments of the present application is to propose an internally visualized ring main unit gas box and its assembly process, so that through the observation window and multi-point source distributed diffuser lights, the contact conditions between the contact knives can be effectively observed, thereby achieving a fixed-point visualization effect for all three-position switches, and through the mutual connection between the flange, the observation window and the perspective hole, the sealing of the observation window in the perspective hole is improved, thereby preventing the observation window from leaking due to its excessive size.

[0005] To achieve the above-mentioned purpose, the first aspect of an embodiment of the present application proposes an internally visualized ring network cabinet gas box, comprising: a gas box shell, the gas box shell comprising a gas box rear plate, the gas box rear plate comprising a flange, an observation window, a perspective hole and a first stud, the first stud is arranged on the inner side of the gas box rear plate and is located around the perspective hole, the perspective hole runs through the gas box rear plate, the flange is nested in the perspective hole, the center of the flange overlaps with the center of the perspective hole, a second stud is arranged on the outer side of the flange, and the observation window is installed on the outer side of the flange based on the second stud; a three-position switch, the three-position switch is arranged inside the gas box shell, and the position of the perspective hole corresponds to the position of the three-position switch; a multi-point source distributed astigmatism lamp, the multi-point source distributed astigmatism lamp is installed on the inner side of the gas box rear plate based on the first stud, the center of the multi-point source distributed astigmatism lamp overlaps with the center of the perspective hole, and the lighting range of the multi-point source distributed astigmatism lamp covers the three-position switch.

[0006] Furthermore, in some embodiments, the air box rear plate further comprises: a plurality of first reinforcing ribs, the first reinforcing ribs being horizontally arranged on the outer side surface of the air box rear plate and being located on the upper side or the lower side of the perspective hole, the first reinforcing ribs being parallel to each other, the structure of the first reinforcing ribs being an arch bridge structure, the first reinforcing ribs comprising a plurality of grooves, the grooves being arranged on the upper wall surface of the first reinforcing ribs, the grooves comprising a plurality of first rectangular leakage holes; a plurality of second reinforcing ribs, the second reinforcing ribs being vertically arranged on the outer side surface of the air box rear plate and being located on the left side or the right side of the perspective hole, the second reinforcing ribs being parallel to each other, the structure of the second reinforcing ribs being an arch bridge structure, the second reinforcing ribs The rib includes a plurality of bosses and a plurality of boss leakage holes, the positions of the boss leakage holes correspond one to one with the positions of the bosses, the boss leakage holes are arranged on the upper wall surface of the second reinforcing rib, the boss includes a plurality of meshing teeth, the meshing teeth are arranged on the side wall surface of the second reinforcing rib, the meshing teeth include a plurality of second rectangular leakage holes and a plurality of rectangular protrusions; wherein, the side wall surface of the first reinforcing rib meshes with the second rectangular leakage holes, the rectangular protrusions mesh with the first rectangular leakage holes, the height of the second reinforcing rib is equal to the sum of the height of the first reinforcing rib and the thickness of the upper wall surface of the second reinforcing rib, and the boss leakage holes are used as welding connection leakage holes after the first reinforcing rib and the second reinforcing rib mesh with each other.

[0007] Furthermore, in some embodiments, the air box rear plate also includes a plurality of third reinforcing ribs, which are horizontally arranged on the inner side surface of the air box rear plate and located on the upper side or the lower side of the perspective hole, and each third reinforcing rib is parallel to each other.

[0008] Furthermore, in some embodiments, the flange is an annular structure, the wall thickness of the flange is greater than 6 mm, the inner ring diameter of the flange is smaller than the diameter of the perspective hole, the outer ring diameter of the flange is larger than the diameter of the perspective hole, the outer ring of the flange is welded to the outer side surface of the rear plate of the air box in a closed circular full weld manner, and the inner ring of the flange is welded to the inner side surface of the rear plate of the air box in a closed circular full weld manner.

[0009] Furthermore, in some embodiments, the observation window includes a circular groove and a sealing ring, the circular groove is arranged on the inner wall surface of the observation window, the sealing ring is embedded in the circular groove, and the sealing ring and the flange are tightly attached to each other.

[0010] Further, in some embodiments, a multi-point source distributed diffuser lamp includes: a plurality of diffuser lamps, each diffuser lamp is connected in parallel with each other; a plurality of explosion-proof shells, the explosion-proof shells are arranged above the diffuser lamps, the explosion-proof shells include a plurality of light-transmitting holes, each light-transmitting hole is arranged in a honeycomb shape on the surface of the explosion-proof shell and penetrates the explosion-proof shell; a lamp holder, the lamp holder includes a plurality of sub-lamp holders, the lamp holder forms a four-leaf clover shape structure based on the position distribution of each sub-lamp holder, the center of the lamp holder is a hollow design, the sub-lamp holder includes a first lamp face and a second lamp face, the sub-lamp holder forms a flat Z-shaped structure based on the position distribution of the first lamp face and the second lamp face, the distance from the first lamp face to the center of the perspective hole is less than the distance from the second lamp face to the center of the perspective hole; wherein, the first lamp face includes a plurality of first mounting holes, the first mounting holes are used to mount the sub-lamp holder on the inner side of the rear plate of the gas box, the second lamp face includes a plurality of second mounting holes and a plurality of third mounting holes, the second mounting holes are used to mount the diffuser lamp above the sub-lamp holder, and the third mounting holes are used to mount the explosion-proof shell above the sub-lamp holder.

[0011] Further, in some embodiments, the three-position switch includes a moving contact knife, a stationary contact knife, a grounding contact knife and a swinging sleeve. The moving contact knife is arranged inside the swinging sleeve. The swinging sleeve is used to rotate the moving contact knife. The moving contact knife is connected to the stationary contact knife based on the rotation of the swinging sleeve, or the moving contact knife is connected to the grounding contact knife based on the rotation of the swinging sleeve.

[0012] Furthermore, in some embodiments, the air box shell also includes an air box side panel and an air box front panel, the air box side panel is connected to the air box rear panel, the air box front panel is connected to the air box side panel, the connection method between the air box front panel and the air box side panel is a full welding connection, and the connection method between the air box side panel and the air box rear panel is a full welding connection, wherein the air box front panel, the air box side panel and the air box rear panel are all stainless steel plate structures, and the thickness of the air box front panel, the air box side panel and the air box rear panel are all greater than or equal to 3 mm.

[0013] Furthermore, in some embodiments, the ring main unit gas box also includes an operating mechanism, which is disposed on the outer side of the front plate of the gas box, and is connected to the swing sleeve, and is used to control the three-position switch.

[0014] To achieve the above-mentioned purpose, the second aspect of the embodiment of the present application proposes a ring main unit gas box assembly process, which applies the ring main unit gas box of the first aspect, including: fully welding the gas box front plate and the gas box side plate to obtain a semi-finished gas box shell; assembling the three-position switch to the interior of the semi-finished gas box shell; installing the operating mechanism to the gas box front plate, and connecting the operating mechanism to the three-position switch; staggeringly meshing a plurality of first reinforcing ribs and a plurality of second reinforcing ribs, and welding the meshing between the first reinforcing ribs and the second reinforcing ribs; after the meshing welding of the first reinforcing ribs and the second reinforcing ribs is completed, welding the upper wall surface of the first reinforcing rib to the upper wall surface of the second reinforcing rib based on the boss leak hole to obtain a reinforcing rib structure, the reinforcing rib structure including a plurality of first reinforcing ribs and a plurality of second reinforcing ribs, each The first reinforcing ribs are staggered and meshed with each other; the reinforcing rib structure is welded to the outer side of the air box rear plate; the flange is welded to the inside of the perspective hole in a closed circular full welding manner; the observation window is installed in the second stud of the flange by bolts; the multi-point source distributed astigmatism lamp is installed on the inner side of the air box rear plate, and the center of the multi-point source distributed astigmatism lamp overlaps with the center of the perspective hole; the air box rear plate is installed in the air box shell semi-finished product in the form of a full welding connection to obtain a ring network cabinet air box; wherein, the flange is welded to the inside of the perspective hole in a closed circular full welding manner, including the following steps: a closed circular full welding connection is made between the inner side of the air box rear plate and the inner circle of the flange; a closed circular full welding connection is made between the outer side of the air box rear plate and the outer circle of the flange.

[0015] The embodiments of the present application have the following beneficial effects: the present application is provided with an air box shell, a three-position switch and a multi-point source distributed astigmatism lamp, the air box shell includes an air box rear plate, the air box rear plate includes a flange, an observation window, a perspective hole and a first stud, the first stud is arranged on the inner side of the air box rear plate and is located around the perspective hole, the perspective hole runs through the air box rear plate, the position of the perspective hole corresponds to the position of the three-position switch, the flange is nested in the perspective hole, the center of the flange overlaps with the center of the perspective hole, the outer side of the flange is provided with a second stud, the observation window is installed on the outer side of the flange based on the second stud, the three-position The switch is arranged inside the gas box shell, and the multi-point source distributed astigmatism lamp is installed on the inner side of the gas box rear plate based on the first stud. The center of the multi-point source distributed astigmatism lamp overlaps with the center of the perspective hole. The lighting range of the multi-point source distributed astigmatism lamp covers the three-position switch, and then through the observation window and the multi-point source distributed astigmatism lamp, the contact condition between the contact knives can be effectively observed, thereby realizing the fixed-point visualization effect of all three-position switches, and through the mutual connection between the flange, the observation window and the perspective hole, the sealing of the observation window in the perspective hole is improved, thereby preventing the observation window from leaking due to its excessive size. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the outer side of the rear plate of a ring main unit gas box with internal visualization provided in an embodiment of the present application; Figure 2 is a schematic structural diagram of the inner side of the air box rear plate provided in an embodiment of the present application; Figure 3 is a schematic diagram of the structure of a three-position switch provided in an embodiment of the present application; Figure 4 is a schematic diagram of the structure of the operating mechanism provided in the embodiment of the present application; Figure 5 is a schematic structural diagram of the first reinforcing rib and the second reinforcing rib provided in an embodiment of the present application; Figure 6 It is a structural schematic diagram of a multi-point source distributed astigmatism lamp provided in an embodiment of the present application; Figure 7 is a schematic diagram of the structure of the mutual engagement between the first reinforcing rib and the second reinforcing rib provided in an embodiment of the present application; Figure 8 It is a schematic diagram of the structure of the flange provided in an embodiment of the present application; Fig. 9 is a schematic diagram of the structure of the observation window provided in the embodiment of the present application; Fig.10 is a schematic diagram of the structure of a lamp stand provided in an embodiment of the present application; Fig.11 It is a schematic diagram of the structure of the explosion-proof housing provided in an embodiment of the present application; Fig.12 It is an optional flow chart of the ring main unit gas box assembly process provided in the embodiment of the present application.

[0017] Figure 1: air box housing 100, air box rear plate 110, air box front plate 120, air box side plate 130, flange 210, second stud 211, observation window 220, circular groove 221, sealing ring 222, perspective hole 230, first stud 240, first reinforcing rib 250, groove 251, first rectangular leak hole 252, second reinforcing rib 260, boss 261, boss leak hole 262, third reinforcing rib 270, meshing tooth 280, first Two rectangular leakage holes 281, rectangular protrusions 282, three-position switch 300, moving contact knife 310, stationary contact knife 320, grounding contact knife 330, swinging sleeve 340, multi-point source distributed astigmatism lamp 400, astigmatism lamp 410, explosion-proof shell 420, light-transmitting hole 421, lamp holder 430, sub-lamp holder 431, first lamp surface 440, first mounting hole 441, second lamp surface 450, second mounting hole 451, third mounting hole 452, operating mechanism 500. DETAILED DESCRIPTION

[0018] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0019] It should be noted that, although the functional modules are divided in the device schematic diagram and the logical order is shown in the flowchart, in some cases, the steps shown or described may be performed in a different order than the module division in the device or the order in the flowchart. The terms "first", "second", etc. in the specification, claims and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by technical personnel in the technical field of this application. The terms used herein are only for the purpose of describing the embodiments of this application and are not intended to limit this application.

[0021] In the prior art, most of the gas boxes of the ring main unit are provided with an observation window on the front panel to observe the status of the internal switches, but the circuit breaker mechanism, isolation mechanism and other mechanical / electrical components need to be mounted on the front panel of the gas box, and the larger the observation window, the more likely it is to leak. As a result, the existing observation window is very small, and the position of the observation window needs to consider the placement of various components, and it is impossible to effectively observe all switch states. At the same time, the interior of the ring main unit gas box at this stage is dark, and the staff needs to use a flashlight to observe through the observation window one by one, and thus cannot effectively observe the contact conditions between the contact knives, and cannot perform effective inspections, resulting in frequent failures of the ring main unit due to poor contact of the contact knives.

[0022] Based on this, an air box shell 100, a three-position switch 300 and a multi-point source distributed astigmatism lamp 400 are provided, the air box shell 100 includes an air box rear plate 110, the air box rear plate 110 includes a flange 210, an observation window 220, a perspective hole 230 and a first stud 240, the first stud 240 is arranged on the inner side of the air box rear plate 110 and is located around the perspective hole 230, the perspective hole 230 runs through the air box rear plate 110, the flange 210 is nested in the perspective hole 230, the center of the flange 210 overlaps with the center of the perspective hole 230, the outer side of the flange 210 is provided with a second stud 211, the observation window 220 is installed on the outer side of the flange 210 based on the second stud 211, the three-position switch 300 is arranged inside the air box shell 100, the perspective hole The position of 230 corresponds to the position of the three-position switch 300, and the multi-point source distributed astigmatism lamp 400 is installed on the inner side of the air box rear plate 110 based on the first stud 240. The center of the multi-point source distributed astigmatism lamp 400 overlaps with the center of the perspective hole 230. The lighting range of the multi-point source distributed astigmatism lamp 400 covers the three-position switch 300, and then through the observation window 220 and the multi-point source distributed astigmatism lamp 400, the contact conditions between the contact knives can be effectively observed, thereby realizing the fixed-point visualization effect of all three-position switches 300, and through the mutual connection between the flange 210, the observation window 220 and the perspective hole 230, the sealing of the observation window 220 in the perspective hole 230 is improved, thereby preventing the observation window 220 from leaking due to its excessive size.

[0023] The internally visualized ring main unit gas box and its assembly process provided in the embodiments of the present application are specifically illustrated through the following embodiments. First, the internally visualized ring main unit gas box in the embodiments of the present application is described.

[0024] The embodiments of the present application are further described below in conjunction with the accompanying drawings.

[0025] Reference Figure 1 , Figure 3 , Figure 6 , Figure 8 and Fig. 9 , Figure 1 is a schematic diagram of the outer side of the rear plate of a ring main unit gas box with internal visualization provided in an embodiment of the present application, Figure 3 is a schematic diagram of the structure of a three-position switch provided in an embodiment of the present application, Figure 6 is a schematic diagram of the structure of a multi-point source distributed astigmatism lamp provided in an embodiment of the present application, Figure 8 is a schematic diagram of the structure of the flange provided in the embodiment of the present application, Fig. 9 : is a structural schematic diagram of an observation window provided in an embodiment of the present application. An embodiment of the present application provides a ring main unit gas box with internal visualization, including: The air box housing 100 includes an air box rear plate 110, the air box rear plate 110 includes a flange 210, an observation window 220, a perspective hole 230 and a first stud 240, the first stud 240 is arranged on the inner side of the air box rear plate 110 and is located around the perspective hole 230, the perspective hole 230 runs through the air box rear plate 110, the flange 210 is nested in the perspective hole 230, the center of the flange 210 overlaps with the center of the perspective hole 230, the outer side of the flange 210 is provided with a second stud 211, and the observation window 220 is installed on the outer side of the flange 210 based on the second stud 211; A three-position switch 300, which is disposed inside the gas box housing 100, wherein the position of the perspective hole 230 corresponds to the position of the three-position switch 300; A multi-point source distributed astigmatism lamp 400 is installed on the inner side of the air box rear plate 110 based on the first stud 240. The center of the multi-point source distributed astigmatism lamp 400 overlaps with the center of the perspective hole 230. The lighting range of the multi-point source distributed astigmatism lamp 400 covers the three-position switch 300.

[0026] There may be multiple three-position switches 300, and the number of three-position switches is set according to the actual needs of the power distribution system, safety regulations, technical standards and economic cost.

[0027] The perspective hole 230 is a circular leak hole located near the same height as the three-position switch 300. The contact state of the switch can be directly observed through the perspective hole 230. The number of perspective holes 230 is determined by the number of switches inside the gas box. If the number of three-position switches 300 inside the gas box is n, the number of perspective holes 230 is n-1. The diameter of the perspective hole 230 is larger than the minor diameter of the flange 210 and smaller than the major diameter of the flange 210. For example, referring to Figure 3 If there are four three-way switches inside the gas box, three perspective holes 230 are set on the rear plate 110 of the gas box.

[0028] Among them, there can be multiple first studs 240, which are evenly distributed around the perspective hole 230, and at least two first studs 240 are set in each direction of the up, down, left and right of the perspective hole 230. For example, a total of eight first studs 240 are set around the perspective hole 230, and two first studs 240 are set in each direction of the up, down, left and right of the perspective hole 230.

[0029] There may be multiple second studs 211 . Since the observation window 220 is installed on the outer side of the flange 210 based on the second studs 211 , the number of screw holes provided on the observation window 220 is consistent with the number of the second studs 211 .

[0030] Based on this, an air box shell 100, a three-position switch 300 and a multi-point source distributed astigmatism lamp 400 are provided, the air box shell 100 includes an air box rear plate 110, the air box rear plate 110 includes a flange 210, an observation window 220, a perspective hole 230 and a first stud 240, the first stud 240 is arranged on the inner side of the air box rear plate 110 and is located around the perspective hole 230, the perspective hole 230 runs through the air box rear plate 110, the position of the perspective hole 230 corresponds to the position of the three-position switch 300, the flange 210 is nested in the perspective hole 230, the center of the flange 210 overlaps with the center of the perspective hole 230, the outer side of the flange 210 is provided with a second stud 211, and the observation window 220 is installed on the outer side of the flange 210 based on the second stud 211 The three-position switch 300 is arranged inside the gas box shell 100, and the multi-point source distributed astigmatism lamp 400 is installed on the inner side of the gas box rear plate 110 based on the first stud 240. The center of the multi-point source distributed astigmatism lamp 400 overlaps with the center of the perspective hole 230. The illumination range of the multi-point source distributed astigmatism lamp 400 covers the three-position switch 300, and then through the observation window 220 and the multi-point source distributed astigmatism lamp 400, the contact condition between the contact knives can be effectively observed, thereby realizing the fixed-point visualization effect of all three-position switches 300, and through the mutual connection between the flange 210, the observation window 220 and the perspective hole 230, the sealing of the observation window 220 in the perspective hole 230 is improved, thereby preventing the observation window 220 from leaking due to its excessive size.

[0031] refer to Figure 1 , Figure 5 and Figure 7 , Figure 5 is a schematic diagram of the structure of the first reinforcing rib and the second reinforcing rib provided in an embodiment of the present application, Figure 7 : is a schematic diagram of the structure of the mutual meshing between the first reinforcing rib and the second reinforcing rib provided in the embodiment of the present application. The embodiment of the present application provides an internally visualized ring main unit gas box, and the gas box rear plate 110 also includes: a plurality of first reinforcing ribs 250, the first reinforcing ribs 250 are horizontally arranged on the outer side of the gas box rear plate 110 and are located on the upper side or the lower side of the perspective hole 230, and the first reinforcing ribs 250 are parallel to each other, and the structure of the first reinforcing ribs 250 is an arch bridge structure, and the first reinforcing ribs 250 include a plurality of grooves 251, and the grooves 251 are arranged on the upper wall surface of the first reinforcing ribs 250, and the grooves 251 include a plurality of first rectangular leak holes 252; A plurality of second reinforcing ribs 260, the second reinforcing ribs 260 are vertically arranged on the outer side surface of the air box rear plate 110 and are located on the left or right side of the perspective hole 230, the second reinforcing ribs 260 are parallel to each other, the structure of the second reinforcing ribs 260 is an arch bridge structure, the second reinforcing ribs 260 include a plurality of bosses 261 and a plurality of boss leakage holes 262, the positions of the boss leakage holes 262 correspond to the positions of the bosses 261 one by one, the boss leakage holes 262 are arranged on the upper wall surface of the second reinforcing ribs 260, the bosses 261 include a plurality of meshing teeth 280, the meshing teeth 280 are arranged on the side wall surface of the second reinforcing ribs 260, the meshing teeth 280 include a plurality of second rectangular leakage holes 281 and a plurality of rectangular protrusions 282; Among them, the side wall surface of the first reinforcing rib 250 is meshed with the second rectangular leakage hole 281, the rectangular protrusion 282 is meshed with the first rectangular leakage hole 252, the height of the second reinforcing rib 260 is equal to the sum of the height of the first reinforcing rib 250 and the thickness of the upper wall surface of the second reinforcing rib 260, and the boss leakage hole 262 is used as a welding connection leakage hole after the first reinforcing rib 250 and the second reinforcing rib 260 are meshed with each other.

[0032] It should be noted that the first reinforcing rib 250 and the second reinforcing rib 260 will be combined into a reinforcing rib structure in the shape of a cross after meshing and welding, and a plurality of first reinforcing ribs 250 and a plurality of second reinforcing ribs 260 will be combined into a mesh reinforcing rib net, and the perspective hole 230 is located in the grid of the reinforcing rib net. Generally, the distance from the top of the perspective hole 230 to the first reinforcing rib 250 is equal to the distance from the bottom of the perspective hole 230 to the first reinforcing rib 250. Similarly, the distance from the left side of the perspective hole 230 to the second reinforcing rib 260 is equal to the distance from the right side of the perspective hole 230 to the second reinforcing rib 260. Based on this, the pressure around the perspective hole 230 is shared by the first reinforcing rib 250 and the second reinforcing rib 260, and is evenly shared in the horizontal and vertical directions, which can prevent excessive pressure at a certain point around the perspective hole 230 from causing local deformation of the air box rear plate 110, and improve the structural rigidity and anti-deformation ability of the air box rear plate 110 around the perspective hole 230.

[0033] It should be noted that each first reinforcing rib 250 and second reinforcing rib 260 is welded at a welding point at regular intervals on the air box rear plate 110, so that each first reinforcing rib 250 and second reinforcing rib 260 can be fixed on the air box rear plate 110. At the same time, the wall thickness of each first reinforcing rib 250 and second reinforcing rib 260 is at least 3 mm, and the length of the first reinforcing rib 250 is substantially equal to the length of the long side of the air box rear plate 110.

[0034] Based on this, by setting a plurality of first reinforcing ribs 250 and a plurality of second reinforcing ribs 260, and the first reinforcing ribs 250 and the second reinforcing ribs 260 can engage with each other, the welding connection leak holes after the first reinforcing ribs 250 and the second reinforcing ribs 260 engage with each other are welded, which can improve the rigidity of the reinforcing ribs, thereby inhibiting the deformation of the air box rear plate 110 and preventing the internal gas of the air box from leaking easily through the observation window 220.

[0035] refer to Figure 2 , Figure 2 It is a structural schematic diagram of the inner side of the air box rear plate provided in an embodiment of the present application. The embodiment of the present application provides an internally visualized ring network cabinet air box. The air box rear plate 110 also includes a plurality of third reinforcing ribs 270. The third reinforcing ribs 270 are horizontally arranged on the inner side surface of the air box rear plate 110 and are located on the upper side or the lower side of the perspective hole 230. The third reinforcing ribs 270 are parallel to each other.

[0036] The wall thickness of the third reinforcing rib 270 is at least 3 mm, and the length of the third reinforcing rib 270 is equivalent to the length of the first reinforcing rib 250 .

[0037] It should be noted that since the air tightness of the ring main cabinet air box is good, the gas inside the ring main cabinet air box is sensitive to the temperature of the ring main cabinet air box. When the temperature around the ring main cabinet air box drops suddenly, the gas inside the ring main cabinet air box shrinks, and the external atmospheric pressure exerts a greater force on the box wall, which will cause the ring main cabinet air box to be subjected to an inward force. Since the first reinforcement rib 250 and the second reinforcement rib 260 are arranged on the outside of the air box rear plate 110, they cannot effectively resist the inward force.

[0038] Based on this, a plurality of third reinforcing ribs 270 are arranged horizontally on the inner side of the air box rear plate 110 and located on the upper or lower side of the perspective hole 230. The third reinforcing ribs 270 are parallel to each other, which can effectively prevent the inward deformation of the air box rear plate 110 and solve the problem that the gas inside the air box is easy to leak through the observation window 220.

[0039] refer to Figure 1 , Figure 2 , Figure 6 and Figure 8 The embodiment of the present application provides an internally visualized ring main unit gas box, the flange 210 is an annular structure, the wall thickness of the flange 210 is greater than 6 mm, the inner ring diameter of the flange 210 is smaller than the diameter of the perspective hole 230, the outer ring diameter of the flange 210 is greater than the diameter of the perspective hole 230, the outer ring of the flange 210 is welded to the outer side surface of the gas box rear plate 110 in a closed circular full welding manner, and the inner ring of the flange 210 is welded to the inner side surface of the gas box rear plate 110 in a closed circular full welding manner.

[0040] Based on this, by designing the wall thickness of the flange 210 to be greater than 6 mm, the structural strength of the flange 210 can be increased, and the deformation of the flange 210 can be prevented from causing air leakage in the ring main unit air box; by designing the inner ring diameter of the flange 210 to be smaller than the diameter of the perspective hole 230, and the outer ring diameter of the flange 210 to be larger than the diameter of the perspective hole 230, the outer ring of the flange 210 is welded to the outer side surface of the air box rear plate 110 in a closed circular full welding manner, and the inner ring of the flange 210 is welded to the inner side surface of the air box rear plate 110 in a closed circular full welding manner, which can increase the flatness from the air box rear plate 110 to the surface of the flange 210 and increase the degree of integration of the air box rear plate 110 and the flange 210, so that the force in the flange 210 area is uniform, and it is not easy to have tiny air holes that cause air leakage in the ring main unit air box.

[0041] refer to Figure 1 , Figure 2 , Figure 6 and Fig. 9 The embodiment of the present application provides a ring main unit gas box with internal visualization, the observation window 220 includes a circular groove 221 and a sealing ring 222, the circular groove 221 is arranged on the inner wall surface of the observation window 220, the sealing ring 222 is embedded in the circular groove 221, and the sealing ring 222 and the flange 210 are tightly attached to each other.

[0042] The height of the flange on the outer ring of the circular groove 221 is the same as the inner wall of the observation window 220 , and the height of the flange on the inner ring of the circular groove 221 must at least reach the wall thickness of the flange 210 plus the wall thickness of the observation window 220 .

[0043] The contact blade of the three-position switch can be observed at a fixed point through the observation window 220, without deliberately looking for the contact blade position of the three-position switch 300, which facilitates the maintenance work of the staff.

[0044] Based on this, the observation window 220 and the flange 210 are tightly combined through the sealing ring 222, which can maintain good air tightness of the ring main unit air box, maintain the flatness of the contact surface between the observation window 220 and the flange 210, prevent the air box rear plate 110 from deformation, and improve the air tightness of the ring main unit air box.

[0045] refer to Figure 6 , Fig.10 and Fig.11 , Fig.10 is a schematic diagram of the structure of a lamp stand provided in an embodiment of the present application, Fig.11 : is a schematic diagram of the structure of the explosion-proof shell provided in an embodiment of the present application. The embodiment of the present application provides a ring main unit gas box with internal visualization, and the multi-point source distributed scattered light lamp 400 also includes: A plurality of diffuser lamps 410, each diffuser lamp 410 is connected in parallel with each other; A plurality of explosion-proof shells 420, the explosion-proof shells 420 are arranged above the diffuser lamp 410, and the explosion-proof shells 420 include a plurality of light-transmitting holes 421, each of which is distributed in a honeycomb shape on the surface of the explosion-proof shell 420 and penetrates the explosion-proof shell 420; A lamp holder 430, the lamp holder 430 includes a plurality of sub-lamp holders 431, the lamp holder 430 forms a four-leaf clover-shaped structure based on the position distribution of each sub-lamp holder 431, the center of the lamp holder 430 is hollowed out, the sub-lamp holder 431 includes a first lamp surface 440 and a second lamp surface 450, the sub-lamp holder 431 forms a flat Z-shaped structure based on the position distribution of the first lamp surface 440 and the second lamp surface 450, and the distance from the first lamp surface 440 to the center of the perspective hole 230 is smaller than the distance from the second lamp surface 450 to the center of the perspective hole 230; Among them, the first lamp surface 440 includes multiple first mounting holes 441, the first mounting holes 441 are used to install the sub-lamp holder 431 on the inner side of the air box rear plate 110, the second lamp surface 450 includes multiple second mounting holes 451 and multiple third mounting holes 452, the second mounting holes 451 are used to install the scattered light lamp 410 above the sub-lamp holder 431, and the third mounting holes 452 are used to install the explosion-proof shell 420 above the sub-lamp holder 431.

[0046] The shape of the diffuser lamp 410 and the explosion-proof shell 420 is flat, and both can be a flat rectangular, long strip or round cake design, which is not limited in this application. Based on this, it is beneficial to compress the space occupied by the diffuser lamp 410, so that the diffuser lamp 410 is as far away from the three-position switch 300 as possible, increase the insulation distance from high voltage to low voltage, ensure the insulation reliability of the ring network cabinet box, and help improve the heat dissipation capacity.

[0047] In a possible implementation, the explosion-proof shell 420 is made of a material having a ratio of 70% nylon + 30% glass fiber. The diffuser lamp 410 is fixed on the lamp holder 430 via bolts and the second mounting hole 451 .

[0048] Among them, the height difference between the first lamp surface 440 and the second lamp surface 450 is the length that the small head of the bolt can extend when the bolt is tightened, which can further make the diffuser lamp 410 as far away from the three-position switch 300 as possible, increase the insulation distance from high voltage to low voltage, and ensure the insulation reliability of the ring network cabinet.

[0049] Among them, since the multi-point source distributed astigmatism lamp 400 is installed on the inner side of the air box rear plate 110 based on the first studs 240, the number of the first mounting holes 441 is equal to the number of the first studs 240.

[0050] Based on this, by designing a multi-point source distributed diffuser lamp 400 with multiple diffuser lamps 410, and the sub-lamp holder 431 is in the shape of a four-leaf clover, evenly installed around the perspective hole 230, and the diffuser lamp 410 is installed on the sub-lamp holder 431, full-area lighting of the internal environment of the gas box is achieved, and the contact area of ​​the illuminated three-position switch 300 can be shadow-free, which is convenient for staff to observe; by designing a multi-point source distributed diffuser lamp 400 with multiple explosion-proof shells 420, the diffuser lamp 410 can be protected from arc, flashover and other damage when the three-position switch 300 is actuated, and the surface of the explosion-proof shell 420 is provided with dense light-transmitting holes 421, so that the light source of the diffuser lamp 410 can be transmitted normally.

[0051] In a possible implementation, the astigmatism lamp 410 is fixed to the lamp holder 430 via a buckle and a second mounting hole 451 , and accordingly, a height difference between the first lamp surface 440 and the second lamp surface 450 is a length that the buckle can extend relative to the first lamp surface 440 .

[0052] refer to Figure 3 The embodiment of the present application provides a ring main unit gas box with internal visualization. The three-position switch 300 includes a moving contact knife 310, a stationary contact knife 320, a grounding contact knife 330 and a swinging sleeve 340. The moving contact knife 310 is arranged inside the swinging sleeve 340. The swinging sleeve 340 is used to rotate the moving contact knife 310. The moving contact knife 310 is connected to the stationary contact knife 320 based on the rotation of the swinging sleeve 340, or the moving contact knife 310 is connected to the grounding contact knife 330 based on the rotation of the swinging sleeve 340.

[0053] Based on this, the movable contact knife 310 is rotated by swinging the shaft sleeve 340, and the movable contact knife 310 is connected to the stationary contact knife 320 based on the rotation of the swing shaft sleeve 340, or the movable contact knife 310 is connected to the grounding contact knife 330 based on the rotation of the swing shaft sleeve 340. This can meet different working conditions and prevent misoperation, and ensure the safety of maintenance work when the equipment needs to be inspected or maintained.

[0054] refer to Figure 1 and Figure 4 The embodiment of the present application provides an internally visualized ring main unit gas box, the gas box shell 100 also includes an gas box side panel 130 and an gas box front panel 120, the gas box side panel 130 is connected to the gas box rear panel 110, the gas box front panel 120 is connected to the gas box side panel 130, the connection method between the gas box front panel 120 and the gas box side panel 130 is a full welding connection, and the connection method between the gas box side panel 130 and the gas box rear panel 110 is a full welding connection.

[0055] Among them, the air box front plate 120, the air box side plate 130 and the air box rear plate 110 are all made of stainless steel plate structures, and the thickness of the air box front plate 120, the air box side plate 130 and the air box rear plate 110 are all greater than or equal to 3 mm.

[0056] Among them, it is necessary to first weld the air box front plate 120 and the air box side plate 130, wait for the components inside the air box to be installed, and then weld the air box rear plate 110 to form a sealed shell.

[0057] Based on this, by fully welding the connection between the gas box front plate 120 and the gas box side plate 130, and fully welding the connection between the gas box side plate 130 and the gas box rear plate 110, the air tightness of the ring main unit gas box can be improved to the greatest extent, and the rigidity of the entire ring main unit gas box can be improved. Even in a complex and changeable outdoor environment, the ring main unit gas box is not easily damaged, which is beneficial to improving the stability of the power system.

[0058] refer to Figure 4 , Figure 4 It is a structural schematic diagram of the operating mechanism provided in an embodiment of the present application. The embodiment of the present application provides an internally visualized ring main unit gas box. The ring main unit gas box also includes an operating mechanism 500. The operating mechanism 500 is arranged on the outer edge of the gas box front plate 120. The operating mechanism 500 is connected to the swing sleeve 340. The operating mechanism 500 is used to control the three-position switch 300.

[0059] Based on this, by setting an operating mechanism 500 on the outer side of the air box front plate 120, it is easy for the staff to operate and can improve the maintenance efficiency of the staff; by connecting the operating mechanism 500 with the swing sleeve 340, the swing sleeve 340 is controlled to rotate, thereby controlling the rotation of the three-position switch 300, so that the three-position switch 300 can be connected to the static contact knife 320 or the grounding contact knife 330, which can meet different working conditions and prevent misoperation, and ensure the safety of maintenance work when the equipment needs to be inspected or maintained.

[0060] like Fig.12 As shown, Fig.12 An optional flow chart of a ring main unit gas box assembly process provided in an embodiment of the present application, the ring main unit gas box assembly process includes but is not limited to the following steps S1201 to S1210: Step S1201, fully weld the air box front plate and the air box side plates to obtain a semi-finished air box shell.

[0061] Among them, the air box front plate and the air box side plates are both made of stainless steel plate structures, and the thickness of the air box front plate, the air box side plates and the air box rear plate are all greater than or equal to 3mm.

[0062] Based on this, by fully welding the connection between the front plate and the side plate of the gas box, the rigidity of the entire ring main unit gas box can be improved. Even in a complex and changeable outdoor environment, the ring main unit gas box is not easily damaged, which is beneficial to improving the stability of the power system.

[0063] Step S1202, assembling the three-position switch into the interior of the semi-finished gas box shell.

[0064] Step S1203, installing the operating mechanism to the front plate of the gas box, and connecting the operating mechanism to the three-position switch.

[0065] Based on this, by installing the operating mechanism on the front panel of the gas box, it is easy for the staff to operate and the maintenance efficiency of the staff can be improved; by connecting the operating mechanism with the three-position switch, the rotation of the three-position switch is controlled so that the three-position switch can be connected to the static contact knife or the grounding contact knife, which can meet different working conditions and prevent misoperation, and ensure the safe progress of maintenance work when equipment needs to be inspected or maintained.

[0066] Step S1204, staggeredly meshing the plurality of first reinforcing ribs and the plurality of second reinforcing ribs, and welding the meshing portions between the first reinforcing ribs and the second reinforcing ribs.

[0067] Step S1205, after the first reinforcing rib and the second reinforcing rib are meshed and welded, the upper wall surface of the first reinforcing rib and the upper wall surface of the second reinforcing rib are welded based on the boss leak hole to obtain a reinforcing rib structure, wherein the reinforcing rib structure includes a plurality of first reinforcing ribs and a plurality of second reinforcing ribs, and each first reinforcing rib is meshed with each second reinforcing rib.

[0068] Step S1206, welding the reinforcing rib structure to the outer side surface of the air box rear plate.

[0069] Among them, the order of step S1204, step S1205, and step S1206 cannot be changed, otherwise the functions of the first reinforcing rib, the second reinforcing rib, and the flange will be ineffective.

[0070] The height of the second reinforcing rib is equal to the sum of the height of the first reinforcing rib and the thickness of the upper wall of the second reinforcing rib, and the boss leak hole is used as a welding connection leak hole after the first reinforcing rib and the second reinforcing rib are meshed with each other.

[0071] It should be noted that the first reinforcing rib and the second reinforcing rib will be combined into a reinforcing rib structure in the shape of a cross after meshing and welding, and multiple first reinforcing ribs and multiple second reinforcing ribs will be combined into a mesh reinforcing rib net. The perspective hole is in the grid of the reinforcing rib net. Generally, the distance from the top of the perspective hole to the first reinforcing rib is equal to the distance from the bottom of the perspective hole to the first reinforcing rib. Similarly, the distance from the left side of the perspective hole to the second reinforcing rib is equal to the distance from the right side of the perspective hole to the second reinforcing rib. Based on this, the pressure around the perspective hole is shared by the first reinforcing rib and the second reinforcing rib, and is evenly shared in the horizontal and vertical directions, which can prevent excessive pressure at a certain point around the perspective hole from causing local deformation of the air box rear plate, and improve the structural rigidity and anti-deformation ability of the air box rear plate around the perspective hole.

[0072] It should be noted that each first reinforcement rib and second reinforcement rib are welded at a welding point at regular intervals on the rear plate of the air box, so that each first reinforcement rib and second reinforcement rib can be fixed on the rear plate of the air box. At the same time, the wall thickness of each first reinforcement rib and second reinforcement rib is at least 3 mm, and the length of the first reinforcement rib is substantially equal to the length of the long side of the rear plate of the air box.

[0073] Based on this, by setting multiple first reinforcing ribs and multiple second reinforcing ribs, and the first reinforcing ribs and the second reinforcing ribs can engage with each other, the welding connection leak holes after the first reinforcing ribs and the second reinforcing ribs engage with each other are welded, which can improve the stiffness of the reinforcing ribs, thereby inhibiting the deformation of the rear plate of the air box and preventing the gas inside the air box from leaking through the observation window.

[0074] Step S1207, welding the flange to the inside of the perspective hole in a closed circumferential full welding manner.

[0075] Among them, a closed circumferential full welding connection is made between the inner side surface of the air box rear plate and the inner circle of the flange, and a closed circumferential full welding connection is made between the outer side surface of the air box rear plate and the outer circle of the flange.

[0076] Based on this, by performing a closed circular full weld connection between the inner side of the gas box rear plate and the inner circle of the flange, and performing a closed circular full weld connection between the outer side of the gas box rear plate and the outer circle of the flange, the flatness from the gas box rear plate to the flange surface and the degree of integration of the gas box rear plate and the flange can be increased, so that the flange area is evenly stressed and it is less likely to have tiny air holes that cause air leakage in the ring network cabinet gas box.

[0077] Step S1208, installing the observation window on the second stud of the flange by means of bolts.

[0078] The observation window comprises a circular groove and a sealing ring. The circular groove is arranged on the inner wall surface of the observation window. The sealing ring is embedded in the circular groove. The sealing ring and the flange are tightly attached to each other.

[0079] The height of the flange on the outer ring of the circular groove is the same as the inner wall of the observation window, and the height of the flange on the inner ring of the circular groove must at least reach the wall thickness of the flange plus the wall thickness of the observation window.

[0080] Among them, the contact knife of the three-position switch can be observed at a fixed point through the observation window, without deliberately looking for the contact knife position of the three-position switch, which facilitates the maintenance work of the staff.

[0081] Based on this, by installing the observation window on the second stud of the flange by bolts, the good air tightness of the ring main unit gas box can be maintained, the flatness of the contact surface between the observation window and the flange can be maintained, deformation of the rear plate of the gas box can be prevented, and the air tightness of the ring main unit gas box can be improved.

[0082] Step S1209, installing the multi-point source distributed astigmatism lamp on the inner side of the rear plate of the air box, and the center of the multi-point source distributed astigmatism lamp overlaps with the center of the perspective hole.

[0083] Among them, the multi-point source distributed diffuser lamp includes: a plurality of diffuser lamps, each diffuser lamp is connected in parallel with each other; a plurality of explosion-proof shells, the explosion-proof shell is arranged above the diffuser lamp, the explosion-proof shell includes a plurality of light-transmitting holes, each light-transmitting hole is arranged on the surface of the explosion-proof shell in a honeycomb distribution and penetrates the explosion-proof shell; a lamp holder, the lamp holder includes a plurality of sub-lamp holders, the lamp holder forms a four-leaf clover shape structure based on the position distribution of each sub-lamp holder, the center of the lamp holder is a hollow design, the sub-lamp holder includes a first lamp face and a second lamp face, the sub-lamp holder forms a flat Z-shaped structure based on the position distribution of the first lamp face and the second lamp face, and the distance from the first lamp face to the center of the perspective hole is less than the distance from the second lamp face to the center of the perspective hole; Among them, the first lamp surface includes multiple first mounting holes, the first mounting holes are used to install the sub-lamp holder on the inner side of the air box rear plate, the second lamp surface includes multiple second mounting holes and multiple third mounting holes, the second mounting holes are used to install the scattered light lamp above the sub-lamp holder, and the third mounting holes are used to install the explosion-proof shell above the sub-lamp holder.

[0084] The shape of the diffuser lamp and the explosion-proof shell is flat, and both can be a flat rectangular, long strip or round cake design, which is not limited in this application. Based on this, it is beneficial to compress the space occupied by the diffuser lamp, keep the diffuser lamp away from the three-position switch as far as possible, increase the insulation distance from high voltage to low voltage, ensure the insulation reliability of the ring network cabinet, and help improve the heat dissipation capacity.

[0085] In a possible implementation, the explosion-proof shell is made of a material with a ratio of 70% nylon + 30% glass fiber. The diffuser lamp is fixed on the lamp holder through bolts and the second mounting hole.

[0086] Among them, the height difference between the first lamp surface and the second lamp surface is the length that the small head of the bolt can extend when the bolt is tightened, which can further keep the scattered light lamp as far away from the three-position switch as possible, increase the insulation distance from high voltage to low voltage, and ensure the insulation reliability of the ring network cabinet.

[0087] Among them, since the multi-point source distributed astigmatism lamp is installed on the inner side of the air box rear plate based on the first studs, the number of the first mounting holes is equal to the number of the first studs.

[0088] Based on this, by installing a multi-point source distributed diffuser lamp on the inner side of the rear plate of the gas box, the center of the multi-point source distributed diffuser lamp overlaps with the center of the perspective hole, thereby achieving full-area lighting of the internal environment of the gas box, and making the contact area of ​​the illuminated three-position switch shadowless, which is convenient for staff to observe. In a possible implementation, the astigmatism lamp is fixed to the lamp holder through the buckle and the second mounting hole, and accordingly, the height difference between the first lamp surface and the second lamp surface is the length that the buckle can extend relative to the first lamp surface.

[0089] Step S1210, installing the air box rear plate into the air box shell semi-finished product in the form of full welding connection to obtain the ring main unit air box.

[0090] Among them, the rear plate of the air box is a stainless steel plate structure with a thickness greater than or equal to 3mm.

[0091] Based on this, by installing the gas box rear plate in the semi-finished gas box shell in the form of a full welding connection, a ring main unit gas box is obtained, which can maximize the air tightness of the ring main unit gas box and improve the rigidity of the entire ring main unit gas box. Even in a complex and changeable outdoor environment, the ring main unit gas box is not easily damaged, which is beneficial to improving the stability of the power system.

[0092] The embodiments described in the embodiments of the present application are intended to more clearly illustrate the technical solutions of the embodiments of the present application, and do not constitute a limitation on the technical solutions provided in the embodiments of the present application. Technical personnel in this field can know that with the evolution of technology and the emergence of new application scenarios, the technical solutions provided in the embodiments of the present application are also applicable to similar technical problems.

[0093] It will be understood by those skilled in the art that the technical solutions shown in the figures do not constitute a limitation on the embodiments of the present application, and may include more or fewer steps than shown in the figures, or a combination of certain steps, or different steps.

[0094] It will be understood by those skilled in the art that all or some steps in the method disclosed above, and the functional modules / units in the system and device may be implemented as software, firmware, hardware, or a suitable combination thereof.

[0095] The terms "first", "second", "third", "fourth", etc. (if any) in the specification of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0096] It should be understood that in the present application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0097] In the several embodiments provided in the present application, it should be understood that the disclosed systems and methods can be implemented in other ways. For example, the system embodiments described above are merely schematic. For example, the division of the above units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0098] The units described above as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0099] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0100] The preferred embodiments of the present application are described above with reference to the accompanying drawings, but the scope of the rights of the present application is not limited thereto. Any modifications, equivalent substitutions and improvements made by technical staff in this field without departing from the scope and essence of the present application should be within the scope of the rights of the present application.

Claims

1. A ring main unit gas box with internal visualization, characterized in that: include: An air box shell, the air box shell includes an air box rear plate, the air box rear plate includes a flange, an observation window, a perspective hole and a first stud, the first stud is arranged on the inner side of the air box rear plate and is located around the perspective hole, the perspective hole runs through the air box rear plate, the flange is nested in the perspective hole, the center of the flange overlaps with the center of the perspective hole, the outer side of the flange is provided with a second stud, and the observation window is installed on the outer side of the flange based on the second stud; A three-position switch, the three-position switch is arranged inside the gas box housing, wherein the position of the perspective hole corresponds to the position of the three-position switch; A multi-point source distributed astigmatism lamp is installed on the inner side of the air box rear plate based on the first stud, the center of the multi-point source distributed astigmatism lamp overlaps with the center of the perspective hole, and the lighting range of the multi-point source distributed astigmatism lamp covers the three-position switch.

2. The ring main unit gas box according to claim 1, characterized in that: The air box rear plate also includes: A plurality of first reinforcing ribs, wherein the first reinforcing ribs are horizontally arranged on the outer side of the air box rear plate and located on the upper side or the lower side of the perspective hole, each of the first reinforcing ribs is parallel to each other, the structure of the first reinforcing ribs is an arch bridge structure, the first reinforcing ribs include a plurality of grooves, the grooves are arranged on the upper wall surface of the first reinforcing ribs, and the grooves include a plurality of first rectangular leakage holes; A plurality of second reinforcing ribs, wherein the second reinforcing ribs are vertically arranged on the outer side surface of the air box rear plate and are located on the left or right side of the perspective hole, and each of the second reinforcing ribs is parallel to each other, and the structure of the second reinforcing ribs is an arch bridge structure, and the second reinforcing ribs include a plurality of bosses and a plurality of boss leakage holes, and the positions of the boss leakage holes correspond to the positions of the bosses one by one, and the boss leakage holes are arranged on the upper wall surface of the second reinforcing ribs, and the bosses include a plurality of meshing teeth, and the meshing teeth are arranged on the side wall surface of the second reinforcing ribs, and the meshing teeth include a plurality of second rectangular leakage holes and a plurality of rectangular protrusions; Among them, the side wall surface of the first reinforcing rib is meshed with the second rectangular leakage hole, the rectangular protrusion is meshed with the first rectangular leakage hole, the height of the second reinforcing rib is equal to the sum of the height of the first reinforcing rib and the thickness of the upper wall surface of the second reinforcing rib, and the protrusion leakage hole is used as a welding connection leakage hole after the first reinforcing rib and the second reinforcing rib are meshed with each other.

3. The ring main unit gas box according to claim 2, characterized in that: The air box rear plate also includes a plurality of third reinforcing ribs, which are horizontally arranged on the inner side surface of the air box rear plate and located on the upper side or the lower side of the perspective hole, and each of the third reinforcing ribs is parallel to each other.

4. The ring main unit gas box according to claim 1, characterized in that: The flange is an annular structure, the wall thickness of the flange is greater than 6 mm, the inner ring diameter of the flange is smaller than the diameter of the perspective hole, the outer ring diameter of the flange is larger than the diameter of the perspective hole, the outer ring of the flange is welded to the outer side surface of the air box rear plate in a closed circular full weld manner, and the inner ring of the flange is welded to the inner side surface of the air box rear plate in a closed circular full weld manner.

5. The ring main unit gas box according to claim 1, characterized in that: The observation window comprises a circular groove and a sealing ring. The circular groove is arranged on the inner wall surface of the observation window. The sealing ring is embedded in the circular groove. The sealing ring and the flange are in close contact with each other.

6. The ring main unit gas box according to claim 1, characterized in that: The multi-point source distributed astigmatism lamp comprises: A plurality of diffuser lamps, each of which is connected in parallel with each other; A plurality of explosion-proof shells, wherein the explosion-proof shells are arranged above the astigmatism lamps, and the explosion-proof shells include a plurality of light-transmitting holes, each of which is arranged on the surface of the explosion-proof shells in a honeycomb-shaped distribution and penetrates the explosion-proof shells; A lamp stand, the lamp stand comprising a plurality of sub-lamp stands, the lamp stand forming a four-leaf clover shape structure based on the position distribution of each of the sub-lamp stands, the center of the lamp stand being a hollow design, the sub-lamp stand comprising a first lamp face and a second lamp face, the sub-lamp stand forming a flat Z-shaped structure based on the position distribution of the first lamp face and the second lamp face, the distance from the first lamp face to the center of the perspective hole being smaller than the distance from the second lamp face to the center of the perspective hole; Among them, the first lamp surface includes a plurality of first mounting holes, and the first mounting holes are used to install the sub-lamp holder on the inner side of the air box rear plate; the second lamp surface includes a plurality of second mounting holes and a plurality of third mounting holes, and the second mounting holes are used to install the scattered light lamp above the sub-lamp holder; the third mounting holes are used to install the explosion-proof shell above the sub-lamp holder.

7. The ring main unit gas box according to claim 1, characterized in that: The three-position switch includes a moving contact knife, a stationary contact knife, a grounding contact knife and a swinging sleeve. The moving contact knife is arranged inside the swinging sleeve. The swinging sleeve is used to rotate the moving contact knife. The moving contact knife is connected to the stationary contact knife based on the rotation of the swinging sleeve, or the moving contact knife is connected to the grounding contact knife based on the rotation of the swinging sleeve.

8. The ring main unit gas box according to claim 7, characterized in that: The air box shell also includes an air box side panel and an air box front panel, the air box side panel is connected to the air box rear panel, the air box front panel is connected to the air box side panel, the connection between the air box front panel and the air box side panel is a full welding connection, and the connection between the air box side panel and the air box rear panel is a full welding connection, wherein the air box front panel, the air box side panel and the air box rear panel are all stainless steel plate structures, and the thickness of the air box front panel, the air box side panel and the air box rear panel are all greater than or equal to 3 mm.

9. The ring main unit gas box according to claim 8, characterized in that: The ring main unit gas box also includes an operating mechanism, which is arranged on the outer side of the gas box front plate, connected to the swing sleeve, and used to control the three-position switch.

10. A ring main unit gas box assembly process, applied to the ring main unit gas box according to any one of claims 1 to 9, characterized in that: The ring main unit gas box assembly process includes: The air box front plate and the air box side plate are fully welded to obtain a semi-finished air box shell; Assembling the three-position switch into the interior of the semi-finished gas box housing; Installing the operating mechanism to the front plate of the gas box, and connecting the operating mechanism to the three-position switch; Alternately meshing a plurality of the first reinforcing ribs and a plurality of the second reinforcing ribs, and welding the meshing portions between the first reinforcing ribs and the second reinforcing ribs; After the first reinforcing ribs and the second reinforcing ribs are meshed and welded, the upper wall surface of the first reinforcing ribs and the upper wall surface of the second reinforcing ribs are welded based on the boss leak hole to obtain a reinforcing rib structure, wherein the reinforcing rib structure includes a plurality of first reinforcing ribs and a plurality of second reinforcing ribs, and each of the first reinforcing ribs and each of the second reinforcing ribs are meshed with each other in an interlaced manner; Welding the reinforcing rib structure to the outer side surface of the air box rear plate; Welding the flange to the inside of the perspective hole in a closed circumferential full welding manner; Installing the observation window on the second stud of the flange by bolting; Installing a multi-point source distributed astigmatism lamp on the inner side of the rear plate of the air box, wherein the center of the multi-point source distributed astigmatism lamp overlaps with the center of the perspective hole; The air box rear plate is installed in the air box shell semi-finished product in the form of full welding connection to obtain the ring main unit air box; Wherein, the flange is welded to the inside of the perspective hole in a closed circumferential full welding manner, including the following steps: Performing a closed circumferential full welding connection between the inner side surface of the air box rear plate and the inner circle of the flange; A closed circumferential full welding connection is performed between the outer side surface of the air box rear plate and the outer ring of the flange.

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