All-insulated normal-pressure closed single-box modular ring main unit

Abstract

The application relates to the technical field of ring network cabinets, and discloses a full-insulation normal-pressure closed single-box modular ring network cabinet, which comprises a ring network cabinet box body, the top of the ring network cabinet box body is provided with a normal-pressure air chamber; the ring network cabinet box body adopts a welding sealing process, the ring network cabinet box body is a normal-pressure closed structure, is filled with dry air inside, so that the whole device does not use SF6 gas, meets the carbon neutralization requirement, the explosion risk is eliminated through normal-pressure design, the ring network cabinet box body adopts self-recovery insulation, the insulation performance is improved by more than 30%, through the setting of an intelligent control box, the ring network cabinet device is supported to perform remote control and automatic fault isolation functions, in the process of continuously rotating the main transmission fan to remove moisture and reduce temperature, the clean bottom is synchronously driven to reciprocate, the surface of dry agent solid block materials is brushed and cleaned through the clean bottom brush of reciprocating motion, the cleanliness of the contact surface of the dry agent solid block materials is improved, and the use effect of the dry agent solid block materials is improved.

Description

Technical Field

[0001] This invention belongs to the field of ring main unit technology, specifically a fully insulated, normal-pressure, sealed single-box modular ring main unit. Background Technology

[0002] The fully insulated, atmospheric pressure, sealed, single-box modular ring main unit is a high-voltage power distribution equipment that adopts a fully insulated design, atmospheric pressure, sealed structure, single-box integration, and modular configuration. It is mainly used in urban power grids, industrial power distribution, and new energy access scenarios. The fully insulated design eliminates the risk of phase-to-phase short circuits and external flashovers, and the modular design allows for quick replacement of faulty units, shortening power outage time.

[0003] In the prior art, patent application document "CN115425567B" discloses "a high-safety SF6 fully insulated compact ring main unit," which includes a circuit breaker unit, a load switch unit, a bus voltage transformer unit, and a station terminal. The load switch unit includes a main cabinet and a secondary low-voltage compartment located above the main cabinet. Its key feature is that the main cabinet of the load switch unit contains a sealed SF6 gas box, which is the bus compartment N1. The main cabinet space outside the bus compartment N1 is divided into an operating mechanism compartment N2, a fuse compartment N3, a pressure relief channel N4, and a cable compartment N5. This ring main unit is a medium-voltage switchgear product with excellent sealing and waterproof performance. Its internal structure is rationally laid out, compact, and space-saving, while ensuring sufficient insulation distance. It also has an independent pressure relief channel, effectively improving the safety and reliability of the equipment. Furthermore, it is easy to maintain and suitable for widespread use.

[0004] The aforementioned "high-safety SF6 fully insulated compact ring main unit" still has some drawbacks. For example, SF6 is a potent greenhouse gas with a global warming potential (GWP) 23,900 times that of carbon dioxide. After leakage, it remains in the atmosphere for a long time, exacerbating global warming. Traditional fully insulated ring main units use sulfur hexafluoride for insulation, but sulfur hexafluoride is not an environmentally friendly gas and will contribute to the greenhouse effect. At high temperatures, it will also decompose into toxic gases, posing a significant safety hazard to maintenance personnel. At the same time, insufficient heat dissipation of the ring main unit will lead to an increase in the internal temperature of the unit, accelerating the aging of the insulation materials of electrical components. Cables are the main channels for current transmission. When a large current passes through, the conductor resistance will generate a large amount of heat, causing the cable compartment to be in a high-temperature state. Meanwhile, moisture condenses on the surface of the insulation material to form a water film, reducing the insulation resistance and increasing leakage current, which may lead to insulation breakdown or flashover faults, affecting the normal operation of the equipment. Furthermore, existing ring main units often use plastic or wooden pallets for support. The pallets are prone to absorbing moisture in humid environments, leading to a decrease in structural strength.

[0005] To address these issues, a fully insulated, atmospheric pressure, sealed, single-box modular ring main unit is proposed. Summary of the Invention

[0006] In response to the above situation and to overcome the shortcomings of existing technologies, this invention provides a fully insulated, atmospheric pressure, sealed, single-box modular ring main unit. This effectively solves the problem that traditional fully insulated ring main units use sulfur hexafluoride (SF6) for insulation, but SF6 is a non-environmentally friendly gas that contributes to the greenhouse effect and decomposes into toxic gases at high temperatures, posing a significant safety hazard to maintenance personnel. At the same time, insufficient heat dissipation in the ring main unit can lead to increased internal temperature and accelerated aging of electrical component insulation materials.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a fully insulated, atmospheric pressure, sealed, single-box modular ring main unit, comprising a ring main unit enclosure, an atmospheric pressure chamber at the top of the enclosure, an intelligent control box on one side of the atmospheric pressure chamber, a mechanism operation room on one side of the enclosure, a pressure relief chamber at the bottom of the enclosure, a cable compartment on one side of the pressure relief chamber, a humidity sensor fixedly connected to one side of the enclosure, a pressure sensor on one side of the humidity sensor, a top limiting frame fixedly connected to the bottom of the enclosure, a support column fixedly connected to the bottom of the top limiting frame, and a main support base fixedly connected to the bottom of the support column. The frame has an inner sealing plate fixedly connected to the surface of the main support base. A motor body is provided on one side of the inner sealing plate. The output shaft of the motor body is fixedly connected to a main drive rod. One end of the main drive rod is fixedly connected to a first helical gear plate. A second helical gear plate is meshed with one side of the first helical gear plate. An inner transmission vertical rod is fixedly connected to one side of the second helical gear plate. A main transmission fan is fixedly connected to one end of the inner transmission vertical rod. A material frame is provided on the inner side of the inner sealing plate. A side sleeve frame is opened on one side of the inner sealing plate. An outer air guide pipe is fixedly connected to one side of the side sleeve frame. An air outlet groove is opened on one side of the outer air guide pipe. An inner air guide groove is opened on the inner side of the outer air guide pipe.

[0008] Preferably, an inner support plate is fixedly connected to the inner side of the main support base, and a support pad is fixedly connected to the bottom of the main support base. The number of support pads is four, and the number of top limiting frames is three. The three top limiting frames are arranged in parallel along the top of the main support base, and outer limiting plates are fixedly connected to both sides of the multiple top limiting frames.

[0009] Preferably, a side connecting frame is provided on one side of the inner sealing plate, a movable plate is provided on one side of the side connecting frame, and connecting threaded holes are provided on both sides of the side connecting frame and both sides of the movable plate.

[0010] Preferably, air inlets are provided on both sides of the inner sealing plate, and an inner support block is fixedly connected to the inner side of the main support base, a bottom fixing frame is fixedly connected to the inner side of the inner support block, a bottom support frame is fixedly connected to one side of the bottom fixing frame, a bottom sliding rail is provided on the top of the bottom support frame, and a bottom sliding plate is fixedly connected to the bottom of the material frame, with the bottom of the bottom sliding plate slidably connected to the inner side of the bottom sliding rail.

[0011] Preferably, an internal connecting hole is provided on one side of the inner sealing plate, a side support L-frame is fixedly connected to one side of the inner sealing plate, an outer protective box is fixedly connected to the top of the side support L-frame, a bottom bearing plate is movably connected to the bottom of the main drive fan, a support ring frame is movably connected to the bottom of the bottom bearing plate, an outer protective square frame is fixedly connected to one side of the support ring frame, and the two sides of the outer protective square frame are fixedly connected to the inner side of the main support base frame.

[0012] Preferably, a third helical gear is meshed with one side of the second helical gear disc, a side transmission rod is fixedly connected to one side of the third helical gear disc, a fourth helical gear is fixedly connected to one side of the side transmission rod, a fifth helical gear is meshed with one side of the fourth helical gear disc, a special-shaped gear disc is fixedly connected to the top of the fifth helical gear disc, inner transmission gear blocks are meshed with both sides of the special-shaped gear disc, an arc-shaped frame is fixedly connected to one side of the inner transmission gear block, a fixed sleeve is fixedly connected to one side of the arc-shaped frame, an extended outer frame is fixedly connected to one side of the fixed sleeve, an outer fixed rod is fixedly connected to one side of the extended outer frame, and a cleaning bottom brush is fixedly connected to one side of the outer fixed rod.

[0013] Preferably, a bottom sliding block is fixedly connected to the bottom of the extended outer frame, a side support base is fixedly connected to the top of the inner support cross plate, and an inner sliding rail is provided on the top of the side support base. The inner side of the inner sliding rail is slidably connected to the inner side of the bottom sliding block.

[0014] Preferably, a bearing inner ring is slidably connected to the surface of the side transmission rod, an L-limiting frame is movably connected to one side of the bearing inner ring, a bottom L-support frame is fixedly connected to the bottom of the L-limiting frame, a top bearing plate is movably connected to the top of the irregular gear disk, and the top of the top bearing plate is movably connected to the bottom of the top limiting frame.

[0015] Preferably, external clamping brackets are fixedly connected to both sides of the external air duct, and one side of the external clamping bracket is fixedly connected to one side of the cable compartment.

[0016] The usage method of a fully insulated, atmospheric pressure, sealed single-enclosure modular ring main unit includes the following steps:

[0017] S1. The ring main unit enclosure adopts a welded sealing process and is a normal pressure sealed structure filled with dry air. The inside of the ring main unit enclosure is equipped with modular units and an insulation system. The modular units include incoming line units, outgoing line units, and connecting units. Each unit is connected by a plug-in insulated busbar. At the same time, the modular units in the ring main unit enclosure all use standardized interfaces. The insulation system in the ring main unit enclosure adopts a composite structure of solid insulation and gas insulation. A humidity sensor and a pressure sensor are configured on one side of the ring main unit enclosure to detect the ambient humidity and internal pressure in real time. The intelligent control box integrates a partial discharge monitoring module, a temperature monitoring module, and a communication module.

[0018] S2. When placing the ring main unit enclosure after it has been moved to the designated location, first place the bottom of the ring main unit enclosure on the surface of multiple top limit frames. The multiple top limit frames are in contact with the two sides and the bottom of the ring main unit enclosure on three sides, and the bottom of the multiple top limit frames are supported on the top of the main support base frame by support columns.

[0019] S3. The operator uses an external tool to rotate the bolt in the connecting threaded hole and removes the bolt along the inside of the connecting threaded hole. After the bolt is removed, the movable plate is no longer fixed. At this time, the movable plate is moved away along one side of the side connecting frame. After the movable plate is moved away, the operator puts his hand along the side connecting frame into the inside of the inner sealing plate, holds the surface of the material frame and pulls the material frame to the outside of the side connecting frame. The material frame is moved out of the outside of the inner sealing plate. After the material frame is moved to the outside of the inner sealing plate, the operator adds desiccant solid material to the inside of the material frame. After adding, the material frame is pushed back along the inside of the side connecting frame and the movable plate is placed back on the surface of the side connecting frame. Using an external bolt, the movable plate is fixed to one side of the side connecting frame by connecting the threaded holes on both sides of the side connecting frame and the surface of the movable plate. At this time, the external gas will enter the inside of the inner sealing plate through the air inlet and react with the desiccant solid material in the material frame on the inside of the inner sealing plate.

[0020] S4. After the motor body is started, the main drive rod is driven to rotate. The rotating main drive rod will drive the first helical gear plate to rotate. The rotating first helical gear plate will drive the meshing transmission second helical gear plate to rotate synchronously. The synchronously rotating second helical gear plate will drive the inner transmission vertical rod to rotate. The rotating inner transmission vertical rod will drive the main transmission fan to rotate along the inner side of the outer protective frame. The rotating inner transmission vertical rod will be movably supported on the surface of the support ring frame through the bottom bearing plate at the bottom end. Through the stable and continuous rotation of the main transmission fan, the dried gas in the inner sealing plate will enter the inner side of the outer air guide pipe along the side sleeve frame and continuously rise through the outer air guide pipe. Multiple air outlet slots are opened on one side of the outer air guide pipe. The opening of multiple air outlet slots will blow the gas to the surface of the cable chamber.

[0021] S5. During the rotation of helical gear disc No. 2, helical gear disc No. 3 will be driven to rotate synchronously. The rotating helical gear disc No. 3 will drive the side transmission rod to rotate synchronously. When the side transmission rod rotates, it will drive helical gear disc No. 4 to rotate synchronously. The rotating helical gear disc No. 4 will drive the meshing transmission of helical gear disc No. 5 to rotate synchronously. The rotating helical gear disc No. 5 will drive the shaped gear disc to rotate. The shaped gear disc No. 5 has only one side as a gear surface. When the shaped gear disc No. 5 rotates, it will be movably supported at the bottom of the top limit frame by the top bearing plate. The rotating shaped gear disc No. 5 will engage with the inner transmission gear on the inner side of the arc-shaped frame. The transmission is based on the interlocking mechanism, with the inner transmission gear blocks symmetrically arranged on both sides of the arc-shaped frame. The gear surface on one side of the irregular gear disk repeatedly meshes with the surface of the inner transmission gear block. The continuously rotating irregular gear disk drives the arc-shaped frame to reciprocate horizontally. The reciprocating horizontal movement of the arc-shaped frame drives the two fixed sleeves to move horizontally synchronously. The moving fixed sleeves drive the two extended outer frames to move synchronously. The stable reciprocating motion of the extended outer frames drives multiple outer fixed rods to move. When the outer fixed rods move, they drive the cleaning bottom brush to reciprocate along the top of the material frame.

[0022] Compared with the prior art, the beneficial effects of the present invention are:

[0023] 1) The ring main unit enclosure adopts a welded sealing process and is a normal pressure sealed structure filled with dry air, so that the whole equipment does not use SF6 gas, which meets the carbon neutrality requirements. At the same time, the normal pressure design eliminates the risk of explosion. The ring main unit enclosure adopts self-resetting insulation, which improves the insulation performance to more than 30%. In addition, the intelligent control box integrates a partial discharge monitoring module, a temperature monitoring module and a communication module. Through the setting of the intelligent control box, the ring main unit equipment can be remotely controlled and automatically isolated from faults.

[0024] 2) The top limit frame is fixed to the main support base frame by the outer limit plate, which reduces the shaking and displacement of the top limit frame. The main support base frame and the top limit frame are supported by metal, and the support columns made of high-strength rubber material are used to improve the stability of the ring network cabinet.

[0025] 3) External gas will enter the inner side of the inner sealing plate through the air inlet and react with the desiccant solid material in the material frame on the inner side of the inner sealing plate, reducing the moisture in the gas and improving the performance of the ring network cabinet. In addition, the material frame is a portable push-pull cabinet, which allows for portable replacement and cleaning of the desiccant solid material.

[0026] 4) Through the stable and continuous rotation of the main drive fan, the dried gas inside the inner sealing plate will enter the inner side of the outer air guide duct along the side sleeve frame, and continuously rise through the outer air guide duct. Multiple air outlet slots are opened on one side of the outer air guide duct. The opening of multiple air outlet slots will blow the gas to the surface of the cable chamber to cool the cable chamber. At the same time, the gas treated in the inner sealing plate will be blown to the surface of the cable chamber to reduce the impact of moisture on the inner side of the cable chamber and improve the stability of the cable in the cable chamber during use.

[0027] 5) During the continuous rotation of the main drive fan, the cleaning bottom brush is driven to reciprocate along the top of the material frame. The reciprocating cleaning bottom brush is used to scrub and clean the surface of the desiccant solid material, which improves the cleanliness of the contact surface of the desiccant solid material and improves the effectiveness of the desiccant solid material. Attached Figure Description

[0028] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0029] Figure 1 This is a schematic diagram of the overall appearance and structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the ring main unit enclosure structure of the present invention;

[0031] Figure 3 This is a schematic diagram of the cable compartment structure of the present invention;

[0032] Figure 4 This is a schematic diagram of the outer limiting plate structure of the present invention;

[0033] Figure 5 This is a schematic diagram of the outer protective box structure of the present invention;

[0034] Figure 6 This is a schematic diagram of the material frame structure of the present invention;

[0035] Figure 7 This is a schematic diagram of the internal connecting hole structure of the present invention;

[0036] Figure 8 This is a schematic diagram of the main drive rod structure of the present invention;

[0037] Figure 9 This is a schematic diagram of the side transmission rod structure of the present invention;

[0038] Figure 10 This is a schematic diagram of the external fixing rod structure of the present invention;

[0039] Figure 11 This is a schematic diagram of the external air duct structure of the present invention;

[0040] Figure 12 This is a schematic diagram of the air outlet slot structure of the present invention.

[0041] In the diagram: 1. Ring main unit enclosure; 2. Atmospheric pressure chamber; 3. Mechanism operating room; 4. Cable compartment; 5. Pressure relief chamber; 6. Intelligent control box; 701. Humidity sensor; 702. Pressure sensor; 801. Main support base frame; 802. Support column; 803. Top limit frame; 804. Outer limit plate; 805. Support pad; 806. Inner support cross plate; 901. Inner sealing plate; 902. Air inlet; 903. Side connection 904. Through frame; 905. Movable plate; 906. Connecting threaded hole; 907. Material box; 908. Bottom sliding plate; 909. Bottom support frame; 9010. Bottom sliding rail; 9011. Bottom fixed frame; 9012. Inner support block; 1001. Side support L-frame; 1002. Outer protective box; 1003. Motor body; 1004. Main drive rod; 1005. No. 1 helical gear plate; 1006. No. 2 helical gear plate; 1007. Internal transmission 1008. Moving vertical rod; 1009. Main drive fan; 1010. Bottom bearing plate; 1011. Support ring frame; 1012. Outer protective square frame; 1013. Inner connecting hole; 1104. Helical gear plate No. 3; 1105. Side drive rod; 1106. Helical gear plate No. 4; 1107. L-shaped limit frame; 1108. Inner bearing ring; 1109. Bottom L-shaped support frame; 1101. Helical gear plate No. 5; 1101. Irregularly shaped gear plate; 1101. Arc-shaped frame; 1110, inner transmission gear block; 1111, top bearing plate; 1112, fixed sleeve; 1113, extended outer frame; 1114, bottom sliding block; 1115, side support base frame; 1116, inner sliding rail; 1117, outer fixed rod; 1118, cleaning bottom brush; 1201, side sleeve frame; 1202, outer air guide duct; 1203, inner air guide groove; 1204, air outlet groove; 1205, outer clamping frame. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] Example 1

[0044] In this embodiment, by Figures 1-12 The present invention provides the following technical solution:

[0045] A fully insulated, atmospheric pressure, sealed, single-enclosure modular ring main unit includes a ring main unit enclosure 1. An atmospheric pressure chamber 2 is located at the top of the enclosure 1. An intelligent control box 6 is located on one side of the atmospheric pressure chamber 2. A mechanism operation chamber 3 is located on one side of the enclosure 1. A pressure relief chamber 5 is located at the bottom of the enclosure 1. A cable chamber 4 is located on one side of the pressure relief chamber 5. A humidity sensor 701 is fixedly connected to one side of the enclosure 1. A pressure sensor 702 is located on one side of the humidity sensor 701. A top limit frame 803 is fixedly connected to the bottom of the enclosure 1. A support column 802 is fixedly connected to the bottom of the top limit frame 803. A main support base 801 is fixedly connected to the bottom of the support column 802. An inner sealing plate 901 is fixedly connected to the surface of the main support base 801. A motor body 1003 is provided on one side. The output shaft of the motor body 1003 is fixedly connected to a main drive rod 1004. One end of the main drive rod 1004 is fixedly connected to a first helical gear 1005. A second helical gear 1006 is connected to one side of the first helical gear 1005. An inner drive vertical rod 1007 is fixedly connected to one side of the second helical gear 1006. A main drive fan 1008 is fixedly connected to one end of the inner drive vertical rod 1007. A material frame 906 is provided on the inner side of the inner sealing plate 901. A side sleeve frame 1201 is provided on one side of the inner sealing plate 901. An outer air guide duct 1202 is fixedly connected to one side of the side sleeve frame 1201. An air outlet slot 1204 is provided on one side of the outer air guide duct 1202. An inner air guide slot 1203 is provided on the inner side of the outer air guide duct 1202.

[0046] It should be noted that the stable and continuous rotation of the main drive fan 1008 will cause the dried gas in the inner sealing plate 901 to enter the inner side of the outer air guide duct 1202 along the side sleeve frame 1201, and continuously rise through the outer air guide duct 1202. Multiple air outlet slots 1204 are provided on one side of the outer air guide duct 1202. The opening of multiple air outlet slots 1204 is used to blow the gas to the surface of the cable chamber 4 to cool the cable chamber 4.

[0047] In an optional embodiment: an inner support plate 806 is fixedly connected to the inner side of the main support base 801, a support pad 805 is fixedly connected to the bottom of the main support base 801, the number of support pads 805 is four, and the number of top limiting frames 803 is three, and the three top limiting frames 803 are arranged in parallel along the top of the main support base 801, and outer limiting plates 804 are fixedly connected to both sides of the multiple top limiting frames 803.

[0048] It should be noted that the bottom of the ring main unit enclosure 1 is placed on the surface of multiple top limiting brackets 803. By having the multiple top limiting brackets 803 fit against the two sides and the bottom of the ring main unit enclosure 1, the ring main unit enclosure 1 is stably placed on the top of the main support base frame 801. The bottom of the multiple top limiting brackets 803 is supported on the top of the main support base frame 801 by the support columns 802, which improves the stability of the top limiting brackets 803 when placing the ring main unit enclosure 1.

[0049] In an optional embodiment: a side connecting frame 903 is provided on one side of the inner sealing plate 901, a movable plate 904 is provided on one side of the side connecting frame 903, and connecting threaded holes 905 are provided on both sides of the side connecting frame 903 and both sides of the movable plate 904.

[0050] It should be noted that by using an external tool to rotate the bolt inside the threaded hole 905, the bolt can be removed along the inside of the threaded hole 905. After the bolt is removed from its limiting position, the movable plate 904 is no longer fixed, and the movable plate 904 can be moved away along one side of the side connecting frame 903.

[0051] In an optional embodiment: air inlets 902 are provided on both sides of the inner sealing plate 901, and an inner support block 9011 is fixedly connected to the inner side of the main support base 801. A bottom fixing frame 9010 is fixedly connected to the inner side of the inner support block 9011. A bottom support frame 908 is fixedly connected to one side of the bottom fixing frame 9010. A bottom sliding rail 909 is provided on the top of the bottom support frame 908. A bottom sliding plate 907 is fixedly connected to the bottom of the material frame 906. The bottom of the bottom sliding plate 907 is slidably connected to the inner side of the bottom sliding rail 909.

[0052] It should be noted that during the horizontal movement of the material frame 906, the bottom sliding plate 907 will slide along the surface of the bottom sliding rail 909, and the bottom sliding plate 907 will be supported by the bottom support frame 908 during the sliding along the surface of the bottom sliding rail 909, which improves the stability of the horizontal movement of the material frame 906.

[0053] In an optional embodiment: an inner connecting hole 1012 is provided on one side of the inner sealing plate 901, a side support L-frame 1001 is fixedly connected to one side of the inner sealing plate 901, an outer protective box 1002 is fixedly connected to the top of the side support L-frame 1001, a bottom bearing plate 1009 is movably connected to the bottom of the main drive fan 1008, a support ring frame 1010 is movably connected to the bottom of the bottom bearing plate 1009, an outer protective square frame 1011 is fixedly connected to one side of the support ring frame 1010, and the two sides of the outer protective square frame 1011 are fixedly connected to the inner side of the main support base frame 801.

[0054] It should be noted that the rotating inner transmission vertical rod 1007 will drive the main transmission fan 1008 to rotate along the inner side of the outer protective frame 1011, and the rotating inner transmission vertical rod 1007 will be movably supported on the surface of the support ring frame 1010 through the bottom bearing plate 1009 at the bottom end. The stability of the rotation of the inner transmission vertical rod 1007 is maintained by the movable connection of the bottom bearing plate 1009.

[0055] In an optional embodiment: a third helical gear disk 1101 is meshed with one side of the second helical gear disk 1006; a side transmission rod 1102 is fixedly connected to one side of the third helical gear disk 1101; a fourth helical gear disk 1103 is fixedly connected to one side of the side transmission rod 1102; a fifth helical gear disk 1107 is meshed with one side of the fourth helical gear disk 1103; a special-shaped gear disk 1108 is fixedly connected to the top of the fifth helical gear disk 1107; inner transmission gear blocks 1110 are meshed with both sides of the special-shaped gear disk 1108; an arc-shaped frame 1109 is fixedly connected to one side of the inner transmission gear block 1110; a fixed sleeve 1112 is fixedly connected to one side of the arc-shaped frame 1109; an extended outer frame 1113 is fixedly connected to one side of the fixed sleeve 1112; an outer fixed rod 1117 is fixedly connected to one side of the extended outer frame 1113; and a cleaning bottom brush 1118 is fixedly connected to one side of the outer fixed rod 1117.

[0056] It should be noted that when the outer fixing rod 1117 moves, it will drive the cleaning bottom brush 1118 to reciprocate along the top of the material frame 906. The reciprocating cleaning bottom brush 1118 is used to scrub and clean the surface of the desiccant solid material, which improves the cleanliness of the contact surface of the desiccant solid material and improves the effectiveness of the desiccant solid material.

[0057] In an optional embodiment: a bottom sliding block 1114 is fixedly connected to the bottom of the extended outer frame 1113, a side support base 1115 is fixedly connected to the top of the inner support cross plate 806, and an inner sliding rail 1116 is provided on the top of the side support base 1115, with the inner side of the inner sliding rail 1116 slidably connected to the inner side of the bottom sliding block 1114.

[0058] It should be noted that the moving fixed sleeve 1112 will drive the two extended outer frames 1113 to move synchronously. The two extended outer frames 1113 moving synchronously will drive the bottom sliding block 1114 to slide along the inner side of the inner sliding rail 1116, which improves the stability of the movement of the extended outer frame 1113. The stable reciprocating motion of the extended outer frame 1113 will drive the multiple outer fixed rods 1117 to move.

[0059] In an optional embodiment: a bearing inner ring 1105 is slidably connected to the surface of the side transmission rod 1102, an L-limiting frame 1104 is movably connected to one side of the bearing inner ring 1105, a bottom L-support frame 1106 is fixedly connected to the bottom of the L-limiting frame 1104, a top bearing plate 1111 is movably connected to the top of the irregular gear disk 1108, and the top of the top bearing plate 1111 is movably connected to the bottom of the top limiting frame 803.

[0060] It should be noted that when the irregular gear disk 1108 rotates, it is movably supported at the bottom of the top limit frame 803 by the top bearing disk 1111. The movable connection of the top bearing disk 1111 improves the stability of the rotation of the irregular gear disk 1108.

[0061] In an optional embodiment: external clamping brackets 1205 are fixedly connected to both sides of the external air duct 1202, and one side of the external clamping bracket 1205 is fixedly connected to one side of the cable chamber 4.

[0062] It should be noted that the external air duct 1202 is securely fixed to one side of the cable compartment 4 by the external clamp bracket 1205, which improves the stability of the external air duct 1202 during use.

[0063] Example 2

[0064] This embodiment 2 provides a method for using a fully insulated, atmospheric pressure, sealed single-enclosure modular ring main unit, which is used to further explain the working process or principle of the fully insulated, atmospheric pressure, sealed single-enclosure modular ring main unit provided in embodiment 1 above. The specific method is as follows:

[0065] The usage method of a fully insulated, atmospheric pressure, sealed single-enclosure modular ring main unit includes the following steps:

[0066] S1. The ring main unit enclosure 1 adopts a welded sealing process and is a normal pressure sealed structure filled with dry air, ensuring that the entire equipment does not use SF6 gas, meeting carbon neutrality requirements. The normal pressure design eliminates the risk of explosion. The ring main unit enclosure 1 uses self-resetting insulation, improving insulation performance to over 30%. Modular units and an insulation system are installed inside the ring main unit enclosure 1. The modular units include incoming line units, outgoing line units, and connecting units, all connected via plug-in insulated busbars. All modular units within the ring main unit enclosure 1 use standardized interfaces. The insulation system within the ring main unit enclosure 1 uses a composite structure of solid and gas insulation. A humidity sensor 701 and a pressure sensor 702 are installed on one side of the ring main unit enclosure 1 to monitor ambient humidity and internal pressure in real time. The intelligent control box 6 integrates a partial discharge monitoring module, a temperature monitoring module, and a communication module. The intelligent control box 6 supports remote control and automatic fault isolation of the ring main unit equipment.

[0067] S2. When placing the ring main unit enclosure 1 after it has been moved to the designated location, first place the bottom of the ring main unit enclosure 1 on the surface of multiple top limiting brackets 803. The multiple top limiting brackets 803 are then in contact with the sides and bottom of the ring main unit enclosure 1 on three sides, securing the ring main unit enclosure 1 firmly on top of the main support base frame 801. Furthermore, the bottoms of the multiple top limiting brackets 803 are all supported on top of the main support base frame 801 by support columns 802, improving the stability of the ring main unit enclosure 1 during placement. The ring main cabinet 1 is supported by an inner support plate 806 on the inner side of the main support base 801, providing stable support for the heavier side of the ring main cabinet 1. The top limit frame 803 is fixed to the main support base 801 by the outer limit plate 804, reducing the swaying and displacement of the top limit frame 803. The main support base 801 and the top limit frame 803 are made of metal, and the ring main cabinet 1 is supported by a high-strength rubber support column 802.

[0068] S3. In a humid environment, the operator first uses an external tool to rotate the bolt inside the threaded hole 905 and remove the bolt along the inside of the threaded hole 905. With the bolt no longer in place, the movable plate 904 is no longer fixed. At this point, the movable plate 904 is moved away along one side of the side connecting frame 903. After moving the movable plate 904 away, the operator inserts their hand along the side connecting frame 903 into the inside of the inner closing plate 901, grasps the surface of the material frame 906, and pulls the material frame 906 towards the outside of the side connecting frame 903, moving the material frame 906 out of the outer side of the inner closing plate 901. During the horizontal movement of the material frame 906, the bottom sliding plate 907 will slide along the surface of the bottom sliding rail 909. During the sliding of the bottom sliding plate 907 along the bottom sliding rail 909, the bottom support frame will be utilized. Support 908 improves the stability of the horizontal movement of the material frame 906. After the material frame 906 is moved to the outside of the inner sealing plate 901, the operator adds desiccant solid material to the inside of the material frame 906. After adding, the material frame 906 is pushed back along the inside of the side connecting frame 903, and the movable plate 904 is placed back on the surface of the side connecting frame 903. Using external bolts, the movable plate 904 is fixed to one side of the side connecting frame 903 by connecting threaded holes 905 on both sides of the side connecting frame 903 and the surface of the movable plate 904. At this time, the external gas will enter the inside of the inner sealing plate 901 through the air inlet 902 and react with the desiccant solid material in the material frame 906 on the inside of the inner sealing plate 901, reducing the moisture in the gas and improving the effect of the ring main unit 1.

[0069] S4. Simultaneously, the motor body 1003 is fixed to the outside of the ring main unit enclosure 1 by the support of the side support L frame 1001, and the impact of external collisions on the motor body 1003 is reduced by the protection of the outer protective box 1002. After the motor body 1003 is started, it drives the main drive rod 1004 to rotate. The rotating main drive rod 1004 drives the first helical gear disk 1005 to rotate. The rotating first helical gear disk 1005 drives the meshing transmission second helical gear disk 1006 to rotate synchronously. The synchronously rotating second helical gear disk 1006 drives the inner transmission vertical rod 1007 to rotate. The rotating inner transmission vertical rod 1007 drives the main transmission fan 1008 to rotate along the inner side of the outer protective square frame 1011. The rotating inner transmission vertical rod 1007 is movably supported on the support ring by the bottom bearing plate 1009 at the bottom end. The surface of the frame 1010 maintains the rotational stability of the inner transmission vertical rod 1007 by using the movable connection of the bottom bearing plate 1009, reducing the shaking and deviation generated when the main transmission fan 1008 moves. Through the stable and continuous rotation of the main transmission fan 1008, the dried gas in the inner sealing plate 901 enters the inner side of the outer air guide duct 1202 along the side sleeve frame 1201, and continuously rises through the outer air guide duct 1202. Multiple air outlet slots 1204 are opened on one side of the outer air guide duct 1202. The opening of multiple air outlet slots 1204 blows the gas to the surface of the cable chamber 4 to cool the cable chamber 4. At the same time, the treated gas in the inner sealing plate 901 is blown to the surface of the cable chamber 4, reducing the impact of moisture on the inner side of the cable chamber 4 and improving the stability of the cable in the cable chamber 4 during use.

[0070] S5. During the rotation of the second helical gear disk 1006, it will synchronously drive the third helical gear disk 1101 to rotate. The rotating third helical gear disk 1101 will drive the side transmission rod 1102 to rotate synchronously. The rotating side transmission rod 1102 will rotate stably along the inner side of the bearing inner ring 1105. The bottom L support frame 1106 is used to fix the L limit frame 1104 to the surface of the inner support horizontal plate 806. The L limit frame 1104 supports the bearing inner ring 1105, which improves the stability of the rotation of the side transmission rod 1102 and reduces the shaking that occurs during the rotation of the side transmission rod 1102. In this situation, when the side transmission rod 1102 rotates, it synchronously drives the fourth helical gear disk 1103 to rotate. The rotating fourth helical gear disk 1103 synchronously drives the meshing transmission fifth helical gear disk 1107 to rotate. The rotating fifth helical gear disk 1107 drives the irregular gear disk 1108 to rotate. The irregular gear disk 1108 has only one side as a gear surface, and when the irregular gear disk 1108 rotates, it is movably supported at the bottom of the top limit frame 803 through the top bearing disk 1111. The movable connection of the top bearing disk 1111 improves the stability of the rotation of the irregular gear disk 1108. 108 will mesh with the inner transmission gear block 1110 on the inner side of the arc-shaped frame 1109, and the inner transmission gear block 1110 on the inner side of the arc-shaped frame 1109 is symmetrically arranged on both sides of the arc-shaped frame 1109. The gear surface on one side of the irregular gear disk 1108 will repeatedly mesh with the surface of the inner transmission gear block 1110. The continuously rotating irregular gear disk 1108 will drive the arc-shaped frame 1109 to reciprocate horizontally. The reciprocating horizontal movement of the arc-shaped frame 1109 will drive the two fixed sleeves 1112 to move horizontally synchronously. The moving fixed sleeves 1112 will drive the two extended outer frames 1113 to move horizontally synchronously. The two extended outer frames 1113 move in a step-by-step manner, and the bottom sliding block 1114 slides along the inner side of the inner sliding rail 1116, which improves the stability of the movement of the extended outer frame 1113. The stable reciprocating motion of the extended outer frame 1113 will drive multiple outer fixed rods 1117 to move. When the outer fixed rods 1117 move, they will drive the cleaning bottom brush 1118 to reciprocate along the top of the material frame 906. The reciprocating motion of the cleaning bottom brush 1118 is used to brush and clean the surface of the desiccant solid material, which improves the cleanliness of the contact surface of the desiccant solid material and improves the effect of using the desiccant solid material.

[0071] It should be noted that the parts not described in detail in this invention are existing technologies, and the corresponding models can be selected according to actual needs. The internal structure and operating principle of the above parts are also common knowledge to those skilled in the art, and will not be elaborated on further.

[0072] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A fully insulated, atmospheric pressure, sealed, single-enclosure modular ring main unit, comprising a ring main unit enclosure (1), characterized in that: The top of the ring main unit (1) is provided with a normal pressure air chamber (2), and a smart control box (6) is provided on one side of the normal pressure air chamber (2). A mechanism operation room (3) is provided on one side of the ring main unit (1). A pressure relief chamber (5) is provided at the bottom of the ring main unit (1). A cable room (4) is provided on one side of the pressure relief chamber (5). A humidity sensor (701) is fixedly connected to one side of the ring main unit (1). A pressure sensor (702) is provided on one side of the humidity sensor (701). A top limit frame (803) is fixedly connected to the bottom of the ring main unit (1). A support column (802) is fixedly connected to the bottom of the top limit frame (803). A main support base frame (801) is fixedly connected to the bottom of the support column (802). An inner sealing plate (901) is fixedly connected to the surface of the main support base frame (801). A motor body is provided on one side of the inner sealing plate (901). 1003), the output shaft of the motor body (1003) is fixedly connected to a main drive rod (1004), one end of the main drive rod (1004) is fixedly connected to a first helical gear disc (1005), one side of the first helical gear disc (1005) is connected to a second helical gear disc (1006), one side of the second helical gear disc (1006) is fixedly connected to an inner transmission vertical rod (1007), one end of the inner transmission vertical rod (1007) is fixed A main drive fan (1008) is connected to the inner enclosure plate (901), and a material frame (906) is provided on the inner side of the inner enclosure plate (901). A side sleeve frame (1201) is provided on one side of the inner enclosure plate (901), and an outer air guide pipe (1202) is fixedly connected to one side of the side sleeve frame (1201). An air outlet groove (1204) is provided on one side of the outer air guide pipe (1202), and an inner air guide groove (1203) is provided on the inner side of the outer air guide pipe (1202). The inner side of the main support base frame (801) is fixedly connected to an inner support cross plate (806). The number of top limiting frames (803) is three, and the three top limiting frames (803) are arranged in parallel along the top of the main support base frame (801). The two sides of the multiple top limiting frames (803) are fixedly connected with outer limiting plates (804). A side connecting frame (903) is provided on one side of the inner sealing plate (901), and a movable plate (904) is provided on one side of the side connecting frame (903). Connecting threaded holes (905) are provided on both sides of the side connecting frame (903) and both sides of the movable plate (904). The inner sealing plate (901) has air inlets (902) on both sides, and the inner support block (9011) is fixedly connected to the inner side of the main support base (801). The inner support block (9011) is fixedly connected to the inner side of the bottom fixing frame (9010). The bottom support frame (908) is fixedly connected to one side of the bottom fixing frame (9010). The bottom support frame (908) has a bottom sliding rail (909) on its top. The bottom of the material frame (906) is fixedly connected to a bottom sliding plate (907). The bottom of the bottom sliding plate (907) is slidably connected to the inner side of the bottom sliding rail (909).

2. The fully insulated, atmospheric pressure, sealed single-box modular ring main unit according to claim 1, characterized in that: The bottom of the main support base (801) is fixedly connected with a support pad (805), and the number of support pads (805) is four.

3. The fully insulated, atmospheric pressure, sealed single-box modular ring main unit according to claim 2, characterized in that: An internal connecting hole (1012) is provided on one side of the inner sealing plate (901). A side support L-frame (1001) is fixedly connected to one side of the inner sealing plate (901). An outer protective box (1002) is fixedly connected to the top of the side support L-frame (1001). A bottom bearing plate (1009) is movably connected to the bottom of the main drive fan (1008). A support ring frame (1010) is movably connected to the bottom of the bottom bearing plate (1009). An outer protective square frame (1011) is fixedly connected to one side of the support ring frame (1010). The two sides of the outer protective square frame (1011) are fixedly connected to the inner side of the main support base frame (801).

4. The fully insulated, atmospheric pressure, sealed single-box modular ring main unit according to claim 3, characterized in that: One side of the second helical gear disk (1006) is meshed with a third helical gear disk (1101). A side transmission rod (1102) is fixedly connected to one side of the third helical gear disk (1101). A fourth helical gear disk (1103) is fixedly connected to one side of the side transmission rod (1102). A fifth helical gear disk (1107) is meshed with one side of the fourth helical gear disk (1103). A shaped gear disk (1108) is fixedly connected to the top of the fifth helical gear disk (1107). The inner transmission gear block (1110) is meshed with the two sides of the inner transmission gear block (1110). An arc-shaped frame (1109) is fixedly connected to one side of the inner transmission gear block (1110). A fixed sleeve frame (1112) is fixedly connected to one side of the arc-shaped frame (1109). An extension outer frame (1113) is fixedly connected to one side of the fixed sleeve frame (1112). An outer fixing rod (1117) is fixedly connected to one side of the extension outer frame (1113). A cleaning bottom brush (1118) is fixedly connected to one side of the outer fixing rod (1117).

5. The fully insulated, atmospheric pressure, sealed single-box modular ring main unit according to claim 4, characterized in that: The bottom of the extended outer frame (1113) is fixedly connected to a bottom sliding block (1114), and the top of the inner support plate (806) is fixedly connected to a side support base frame (1115). The top of the side support base frame (1115) is provided with an inner sliding rail (1116), and the inner side of the inner sliding rail (1116) is slidably connected to the inner side of the bottom sliding block (1114).

6. The fully insulated, atmospheric pressure, sealed single-box modular ring main unit according to claim 5, characterized in that: The surface of the side transmission rod (1102) is slidably connected to a bearing inner ring (1105), and an L-limiting frame (1104) is movably connected to one side of the bearing inner ring (1105). A bottom L-support frame (1106) is fixedly connected to the bottom of the L-limiting frame (1104). A top bearing plate (1111) is movably connected to the top of the irregular gear disc (1108), and the top of the top bearing plate (1111) is movably connected to the bottom of the top limiting frame (803).

7. The fully insulated, atmospheric pressure, sealed single-box modular ring main unit according to claim 6, characterized in that: The external air duct (1202) is fixedly connected to both sides by an external clamping bracket (1205), and one side of the external clamping bracket (1205) is fixedly connected to one side of the cable chamber (4).

8. A method for using a fully insulated, atmospheric-pressure, sealed, single-enclosure modular ring main unit, applied to the fully insulated, atmospheric-pressure, sealed, single-enclosure modular ring main unit as described in claim 7, characterized in that... Includes the following steps: S1. The ring main unit (1) adopts a welding sealing process. The ring main unit (1) is a normal pressure sealed structure, and the interior is filled with dry air. The inner side of the ring main unit (1) is equipped with modular units and insulation system. The modular units include incoming line units, outgoing line units and connecting units. Each unit is connected by plug-in insulated busbars. At the same time, the modular units set in the ring main unit (1) all adopt standardized interfaces. At the same time, the insulation system set in the ring main unit (1) adopts a composite structure of solid insulation and gas insulation. A humidity sensor (701) and a pressure sensor (702) are configured on one side of the ring main unit (1). The humidity sensor (701) and the pressure sensor (702) are used to detect the ambient humidity and internal pressure in real time. The intelligent control box (6) integrates a partial discharge monitoring module, a temperature monitoring module and a communication module. S2. When the ring main unit (1) is moved to the designated position and placed, the bottom of the ring main unit (1) is first placed on the surface of multiple top limit frames (803). The multiple top limit frames (803) are in contact with the three sides and bottom of the ring main unit (1), and the bottom of the multiple top limit frames (803) is supported on the top of the main support base frame (801) by the support column (802). S3. The operator uses an external tool to rotate the bolt inside the connecting threaded hole (905), and removes the bolt along the inside of the connecting threaded hole (905). After the bolt is removed, the movable plate (904) is no longer fixed. At this time, the movable plate (904) is moved away along one side of the side connecting frame (903). After the movable plate (904) is moved away, the operator puts his hand along the side connecting frame (903) into the inside of the inner closing plate (901), grasps the surface of the material frame (906), and pulls the material frame (906) to the outside of the side connecting frame (903). The material frame (906) is moved out of the outside of the inner closing plate (901). By moving the material frame (906) to the inside of the inner closing plate (903), the operator moves the material frame (906) to the outside of the inner closing plate (901). After the outside of 01), the operator adds desiccant solid material to the inside of the material box (906). After the addition is completed, the material box (906) is pushed back along the inside of the side connecting frame (903), and the movable plate (904) is placed back on the surface of the side connecting frame (903). Using external bolts, the connecting threaded holes (905) on the surface of the movable plate (904) are connected through both sides of the side connecting frame (903) to fix the movable plate (904) on one side of the side connecting frame (903). At this time, the external gas will enter the inside of the inner sealing plate (901) along the air inlet (902) and react with the desiccant solid material in the material box (906) on the inside of the inner sealing plate (901). S4. After starting via the motor body (1003), the main drive rod (1004) is driven to rotate. The rotating main drive rod (1004) will drive the first helical gear disc (1005) to rotate. The rotating first helical gear disc (1005) will drive the meshing transmission second helical gear disc (1006) to rotate synchronously. The synchronously rotating second helical gear disc (1006) will drive the inner transmission vertical rod (1007) to rotate. The rotating inner transmission vertical rod (1007) will drive the main transmission fan (1008) to rotate along the inner side of the outer protective frame (1011). The moving vertical rod (1007) is movably supported on the surface of the support ring frame (1010) by the bottom bearing plate (1009) at the bottom end. Through the stable and continuous rotation of the main drive fan (1008), the dried gas in the inner sealing plate (901) will enter the inner side of the outer air guide pipe (1202) along the side sleeve frame (1201) and continue to rise through the outer air guide pipe (1202). Multiple air outlet slots (1204) are opened on one side of the outer air guide pipe (1202). The gas is blown out to the surface of the cable chamber (4) by the opening of multiple air outlet slots (1204). S5. During the rotation of the second helical gear disk (1006), the third helical gear disk (1101) will be driven to rotate synchronously. The rotating third helical gear disk (1101) will drive the side transmission rod (1102) to rotate synchronously. When the side transmission rod (1102) rotates, it will drive the fourth helical gear disk (1103) to rotate synchronously. The rotating fourth helical gear disk (1103) will drive the meshing transmission fifth helical gear disk (1107) to rotate synchronously. The rotating fifth helical gear disk (1107) will drive the special-shaped gear disk (1108) to rotate. The special-shaped gear disk (1108) has only one side as a gear surface. When the special-shaped gear disk (1108) rotates, it will be movably supported at the bottom of the top limit frame (803) through the top bearing disk (1111). The rotating special-shaped gear disk (1108) will interact with the inner transmission gear block (1) on the inner side of the arc frame (1109). 110) Meshing transmission, and the inner transmission gear block (1110) inside the arc frame (1109) is symmetrically arranged on both sides of the arc frame (1109). The gear surface on one side of the irregular gear disk (1108) will repeatedly mesh with the surface of the inner transmission gear block (1110). The continuously rotating irregular gear disk (1108) will drive the arc frame (1109) to reciprocate horizontally. The reciprocating horizontal movement of the arc frame (1109) will drive the two fixed sleeves (1112) to move horizontally synchronously. The moving fixed sleeves (1112) will drive the two extended outer frames (1113) to move synchronously. The stable reciprocating motion of the extended outer frames (1113) will drive multiple outer fixed rods (1117) to move. When the outer fixed rods (1117) move, they will drive the cleaning bottom brush (1118) to reciprocate along the top of the material frame (906).

Images