High-voltage ring main unit with full-assembly structure

Abstract

The invention discloses a high-voltage ring main unit with a full-assembly structure, and relates to the technical field of high-voltage ring main units. The high-voltage ring main unit of the full-assembly structure comprises a bottom box and a top cover arranged above the bottom box, a first connecting groove is formed in the upper surface of the bottom box, a first lining table is arranged on the outer wall of the bottom of the first connecting groove, and a second connecting groove is formed in the lower surface of the top cover. Through the arrangement of the sealing plates, the four corners of the cabinet body are preliminarily sealed, and under the arrangement of the sealing cavities and the sealing filler, the sealing effect of the joints of the four corners of the cabinet body and the sealing plates is improved, so that the sealing effect of the joints of the side plates, the back plate and the front panel is improved, gas leakage at gaps is avoided, and the air pressure stability during equipment operation is improved; and compared with the traditional mode of directly coating glue at the gap of the cabinet body, the filling type sealing can limit the moving space of the sealing filler to prevent the sealing filler from being separated from the cabinet body, so that the service life of the equipment is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of high-voltage ring network cabinets, and in particular to a high-voltage ring network cabinet with a fully assembled structure. Background Art

[0002] Ring main unit is a group of electrical equipment with high-voltage switchgear installed in a steel plate metal cabinet or made into an assembled interval ring main unit. Its core part adopts load switches and fuses, which have the advantages of simple structure, small size, low price, and can improve power supply parameters and performance as well as power supply safety. It is widely used in distribution stations and box-type substations in urban residential areas, high-rise buildings, large public buildings, factories and enterprises and other load centers. Ring main units are generally divided into three types: air insulation, solid insulation and SF6 insulation. They are used to separate and combine load currents, break short-circuit currents and transformer no-load currents, and charging currents of overhead lines and cable lines at a certain distance. They play a control and protection role. They are important switchgear for ring main unit and terminal power supply. In the cabinet, the load switches with air insulation are mainly gas-generating type, compressed gas type and vacuum type. The load switches with SF6 insulation are SF6 type. Since SF6 gas is enclosed in the shell, the partition fracture formed by it is invisible. However, the traditional ring main unit has a large structure and is extremely inconvenient to transport.

[0003] Chinese invention patent CN117013417A discloses a ring main unit with high-voltage insulated split detachable DIN terminal blocks. The device makes it easier to disassemble the side panels, top panels, inner lining panels and bottom panels that make up the main body of the ring main unit by means of abutment members and elastic locking components. When any of the structures is damaged, it can be quickly replaced, which reduces the maintenance time and improves the stability of the power grid. At the same time, the main body of the ring main unit is composed of side panels, top panels, inner lining panels and bottom panels, so that modular production can be achieved during the production process to reduce production costs. During transportation and construction, temporary assembly can be performed at the construction site without the need to transport the entire cabinet, saving transportation space. During assembly, it can be performed through the cooperation of personnel without the use of cranes, so that the main body of the ring main unit can still be quickly put into use under space constraints.

[0004] However, in actual use, when the assembled ring network cabinet is in use, the sealing effect of the connection gap between the side panels of the cabinet is poor, and air leakage is prone to occur. Therefore, manual filling is usually required to improve the sealing effect. However, this type of glue-filled seal is prone to debonding after the equipment has been running for a long time, which in turn leads to a decrease in sealing performance, resulting in energy loss in the power supply system, increased operating energy consumption, and in severe cases even a decrease in internal pressure of the cabinet, which may cause sparks or explosions. This is a serious safety hazard that can easily lead to loss of life and property. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a fully assembled high-voltage ring network cabinet, which solves the problems raised in the background technology.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a fully assembled high-voltage ring network cabinet, comprising a bottom box and a top cover arranged above the bottom box, wherein a first connecting groove is provided on the upper surface of the bottom box, and a first lining is provided on the bottom outer wall of the first connecting groove, a second connecting groove is provided on the lower surface of the top cover, and a second lining is provided on the top outer wall of the second connecting groove, Also includes: A cabinet body, the cabinet body is arranged between the bottom box and the top cover, the cabinet body comprises two side panels, a back panel and a front panel, the two side panels are arranged on both sides of the bottom box, and the back panel and the front panel are installed between the two side panels, the lower ends of the side panels, the back panel and the front panel are respectively abutted against the first lining platform, and the upper ends of the back panel and the front panel are respectively abutted against the second lining platform; The sealing plate is arranged at the four corners of the cabinet, and the gap between the sealing plate and the cabinet forms a sealing cavity, and the sealing cavity is filled with sealing filler for sealing the gaps in the cabinet.

[0007] Furthermore, it also includes: A first partition, which is arranged at the lower end of the cabinet and located at the upper surface of the bottom box; A second partition, the second partition is arranged at the top of the cabinet and located at the lower surface of the top cover; Limiting grooves adapted to the sealing plate are respectively provided at the four corners of the first partition plate and the second partition plate, and an engaging groove engaged with the inner wall of the first connecting groove is provided on the lower surface of the first partition plate.

[0008] Furthermore, it also includes an air chamber, which is fixed to the upper surface of the top cover, and an air tank is installed inside the air chamber. An air pump is also provided inside the air chamber, and the air pump input end is connected to the air tank output end pipeline, and the air pump output end is connected to the inside of the cabinet. A controller is installed inside the air chamber, and the controller is used to control the operation of the air pump.

[0009] Furthermore, it also includes: Limit rods, there are at least eight limit rods, and the limit rods are symmetrically distributed on both sides of the bottom box, and the lower ends of the limit rods are detachably connected to the first lining platform; A first plug hole is symmetrically arranged on the side panel, and the first plug hole is plugged into the limit rod to be used for positioning when the side panel is installed; The second plug holes are symmetrically arranged on both sides of the back plate and the front plate, and the second plug holes are plugged with the limiting rods to be used for positioning the back plate and the front plate when they are installed.

[0010] Further, it further includes limiting sliding grooves, which are opened at positions close to both ends on the inner sides of the side plates, the back plate, and the front panel, and the limiting sliding grooves are slidably connected to the side edges of the sealing plate.

[0011] Further, it further includes: Support angle plates, the support angle plates are in an inverted "L" shape structure, and the support angle plates are installed on the inner side of the sealing plate, and a bearing plate is installed at the upper ends of the four support angle plates; Mounting frames, which are fixed on the bearing plate for fixing electrical components.

[0012] Further, it further includes a wiring cabinet, which is installed on the back plate, and one end of the wiring cabinet extends into the cabinet body and is provided with a sealing groove, and wiring through holes for installing external wiring cables are equidistantly opened on the wiring cabinet.

[0013] Further, third jacks are symmetrically opened on both sides of the top cover, fourth jacks are symmetrically opened on both side walls of the air chamber, and the upper end of the limiting rod penetrates through the third jack and the fourth jack; The upper end of the air chamber is equidistantly provided with pressing plates, the pressing plates are in an inverted "U" shape structure, and the upper end of the limiting rod penetrates through the pressing plates and is threadedly connected with limiting nuts for fixing the air chamber.

[0014] Further, a first sealing door is hinged on the front surface of the front panel, a second sealing door is hinged on the front surface of the air chamber, a visual window is provided on the front surface of the first sealing door, and a pressure gauge for detecting the air pressure inside the cabinet is installed on the first sealing door.

[0015] Further, a first filling pipe fitting is provided on the front surface of the bottom box for replenishing filler into the first lining table, a second filling pipe fitting is provided on the front surface of the top cover for replenishing filler into the second connecting groove, and both the first filling pipe fitting and the second filling pipe fitting are composed of a filling pipe and an air extraction pipe.

[0016] The present invention has the following beneficial effects: (1) For this fully assembled high-voltage ring main unit, through the setting of the sealing plate, the four corners of the cabinet body are initially sealed. With the settings of the sealing cavity and the sealing filler, the sealing effect at the connection between the four corners of the cabinet body and the sealing plate is improved, and then the sealing effect at the connections between the side plates, the back plate, and the front panel is improved to avoid gas leakage at the gaps, improve the air pressure stability during equipment operation, and compared with the traditional method of directly applying glue at the gaps of the cabinet body, this filling type of sealing can limit the movement space of the sealing filler to avoid the separation of the sealing filler from the cabinet body, thereby extending the service life of the equipment.

[0017] (2) The fully assembled high-voltage ring main unit realizes the fully assembled structure of the cabinet through the coordination of the side panels, back panels, front panels, bottom box and top cover, so that the equipment can be produced in a modular manner, reducing production costs. During transportation and construction, there is no need to transport and hoist the entire cabinet, saving transportation space.

[0018] (3) The fully assembled high-voltage ring network cabinet achieves isolation between the cabinet body and the bottom box by setting the first partition plate, and achieves capping of the upper end of the cabinet body by setting the second partition plate. Then, fillers are filled into the first connecting groove and the second connecting groove, thereby improving the sealing effect of the connection between the first connecting groove, the second connecting groove and the side plate, the back plate and the front plate, thereby further avoiding air leakage and improving the stability of the power voltage.

[0019] (4) The fully assembled high-voltage ring network cabinet can realize the positioning of the side panels, back panels, front panels, top covers and air chambers during assembly through the cooperation between the limit rod and the first socket, the second socket, the third socket and the fourth socket, so as to facilitate the rapid assembly of the equipment during installation. The existence of the limit rod can improve the connection strength of the assembly connection of the equipment. Under the setting of the pressure plate, the upper end of the limit rod can be limited, which is beneficial to the fixation of the air chamber.

[0020] (5) The fully assembled high-voltage ring main unit facilitates the installation of external cables through the setting of the wiring cabinet. After the cables are installed, fillers are injected into the sealing groove to avoid gaps between the cables and the wiring cabinet, thereby avoiding air leakage at the wiring cabinet and further improving the air tightness inside the equipment.

[0021] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 It is a structural schematic diagram of the cabinet of the present invention; Figure 3 It is a schematic diagram of the internal structure of the present invention; Figure 4 An exploded view of the cabinet in the present invention; Figure 5 It is a structural schematic diagram of the sealing cavity in the present invention; Figure 6 For the present invention Figure 5 A top view of Figure 7 It is a structural schematic diagram of the bottom box in the present invention; Figure 8 It is a top view of the bottom box of the present invention; Fig. 9It is a schematic diagram of the structure of the top cover in the present invention; Fig.10 It is a structural schematic diagram of the first partition in the present invention; Fig.11 It is a structural schematic diagram of the wiring cabinet in the present invention; Fig.12 It is a structural schematic diagram of the side plate in the present invention.

[0023] In the figure, 1, bottom box; 2, side plate; 3, back plate; 4, front panel; 5, first sealing door; 6, top cover; 7, air chamber; 8, second sealing door; 9, limiting rod; 10, pressure plate; 11, gas storage tank; 12, controller; 13, air pump; 14, bearing plate; 15, first partition plate; 16, second partition plate; 17, mounting frame; 18, first connecting groove; 19, first lining platform; 20, sealing plate; 21, limiting slide groove; 22, first plug hole; 23, supporting angle plate; 24, wiring cabinet; 25, sealing groove; 26, wiring through hole; 27, sealing cavity; 28, sealing packing; 29, second connecting groove; 30, second lining platform; 31, limiting groove; 32, fitting groove; 33, second plug hole; 34, first filling pipe fitting; 35, second filling pipe fitting; 36, third plug hole. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] See also Figure 1 - Fig.12 The embodiment of the present invention provides a technical solution: a fully assembled high-voltage ring network cabinet, comprising a bottom box 1 and a top cover 6 arranged above the bottom box 1. Preferably, fixed support angles are symmetrically installed on both sides of the bottom box 1 to facilitate the installation of the bottom box 1, and a first connecting groove 18 is opened on the upper surface of the bottom box 1, and a first lining 19 is provided on the bottom outer wall of the first connecting groove 18. It should be noted that the upper end of the bottom box 1 is in an open state to facilitate the installation of electrical equipment inside the bottom box 1. In addition, a second connecting groove 29 is opened on the lower surface of the top cover 6, and a second lining 30 is provided on the top outer wall of the second connecting groove 29.

[0026] The fully assembled high-voltage ring network cabinet provided in this embodiment also includes a cabinet body, which is arranged between the bottom box 1 and the top cover 6. The cabinet body includes two side panels 2, a back panel 3 and a front panel 4. Preferably, inner lining panels are provided on the inner sides of the side panels 2, the back panel 3 and the front panel 4. The two side panels 2 are arranged on both sides of the bottom box 1, and the back panel 3 and the front panel 4 are installed between the two side panels 2. Furthermore, the lower ends of the side panels 2, the back panel 3 and the front panel 4 are respectively abutted against the first lining platform 19, and the upper ends of the back panel 3 and the front panel 4 are respectively abutted against the second lining platform 30. The assembly of the cabinet is achieved through the cooperation between the back panel 3, the front panel 4 and the two side panels 2.

[0027] In addition, in order to improve the sealing effect at the connection between the side panel 2, the back panel 3 and the front panel 4, the fully assembled high-voltage ring network cabinet provided in this embodiment also includes a sealing plate 20. The sealing plate 20 is arranged at the four corners of the cabinet body, and the gap between the sealing plate 20 and the cabinet body forms a sealing cavity 27. The sealing cavity 27 is filled with a sealing filler 28 for sealing the gaps in the cabinet body.

[0028] In the present solution, the four corners of the cabinet are initially sealed by setting a sealing plate 20, and the sealing filler 28 is filled into the sealing cavity 27 to improve the sealing effect at the connection between the side panel 2 and the back panel 3 and the front panel 4, so as to avoid gas leakage at the connection gap between the side panel 2 and the back panel 3 and the front panel 4, thereby improving the air pressure stability inside the cabinet when the equipment is running. Compared with the traditional method of directly applying glue at the cabinet gap, this filling-type sealing can limit the activity space of the sealing filler 28 to avoid the sealing filler 28 from separating from the cabinet, thereby extending the service life of the equipment while ensuring the sealing effect of the cabinet.

[0029] like Figure 3 - Fig.10 As shown, in order to achieve isolation of the cabinet space, the fully assembled high-voltage ring network cabinet provided in this embodiment also includes a first partition 15 and a second partition 16. The first partition 15 is arranged at the lower end of the cabinet and is located on the upper surface of the bottom box 1; the second partition 16 is arranged at the top of the cabinet and is located on the lower surface of the top cover 6. Preferably, the first partition 15 and the second partition 16 are both components of insulating materials. The first partition 15 and the second partition 16 are arranged to achieve sealing of the upper and lower ends of the cabinet.

[0030] To facilitate the connection between the first partition 15, the second partition 16 and the cabinet body, limiting grooves 31 adapted to the sealing plate 20 are respectively opened at the four corners of the first partition 15 and the second partition 16, and the two ends of the sealing plate 20 are respectively plugged into the limiting grooves 31 to improve the stability of the sealing plate 20 after installation, and the lower surface of the first partition 15 is provided with an embedding groove 32 embedded with the inner wall of the first connecting groove 18 to achieve the sealing of the upper surface of the bottom box 1.

[0031] In this embodiment, the first partition plate 15 seals the first connecting groove 18, and the second partition plate 16 seals the second connecting groove 29. By injecting filler into the first connecting groove 18 and the second connecting groove 29, the sealing effect of the connection between the upper and lower ends of the side panel 2, the back panel 3, and the front panel 4 and the bottom box 1 and the top cover 6 is improved. With the setting of the first lining platform 19 and the second lining platform 30, the filler inside the first connecting groove 18 and the second connecting groove 29 is in a step shape, and then the upper and lower ends of the cabinet body are staggeredly connected to the filler, which can further improve the sealing effect of the filler.

[0032] like Figure 1 - Figure 4 As shown, in order to facilitate the inflation of air into the cabinet, the fully assembled high-voltage ring network cabinet provided in this embodiment also includes an air chamber 7, which is fixed to the upper surface of the top cover 6, and a gas storage tank 11 is installed inside the air chamber 7, and an air pump 13 is also provided inside the air chamber 7. The input end of the air pump 13 is connected to the output end of the gas storage tank 11 by a pipeline, and the output end of the air pump 13 is connected to the interior of the cabinet, and a controller 12 is installed inside the air chamber 7. The controller 12 is used to control the operation of the air pump 13, so that the air pump 13 extracts the gas inside the gas storage tank 11, and further inputs the gas into the cabinet, so as to be used for isolation, arc extinguishing and protection of electrical components inside the cabinet.

[0033] Furthermore, in order to facilitate the loading and unloading of the gas tank 11 and to maintain the high-pressure environment inside the cabinet, a guide frame can be installed at the lower end of the air chamber 7, and a tooling for fixing the gas tank 11 is slidably installed on the guide frame. When the gas tank 11 needs to be replaced and repaired, the position of the gas tank 11 can be adjusted by sliding the tooling, thereby facilitating the removal of the gas tank 11 from the air chamber 7, so as to facilitate the inspection, maintenance and replacement of the gas tank 11. In addition, in order to facilitate the inspection and maintenance of the cabinet, a vacuum device can be installed inside the air chamber 7. When the vacuum device is used for cabinet inspection, the recovery of the gas inside the cabinet is controlled to prevent the gas from affecting the surrounding environment.

[0034] like Figure 3 and Figure 4 As shown, the fully assembled high-voltage ring network cabinet provided in this embodiment also includes a limit rod 9, at least eight limit rods 9, and the limit rods 9 are symmetrically distributed on both sides of the bottom box 1, and the lower end of the limit rod 9 is detachably connected to the first liner 19. Preferably, the lower end of the limit rod 9 and the first liner 19 are threaded and plug-in to facilitate loading and unloading between the limit rod 9 and the bottom box 1.

[0035] In order to facilitate the installation of the side panel 2 , first plug holes 22 are symmetrically provided on the side panel 2 , and the first plug holes 22 are plugged into the limiting rods 9 for positioning the side panel 2 during installation.

[0036] To facilitate the installation of the back panel 3 and the front panel 4, the fully assembled high-voltage ring network cabinet provided in this embodiment also includes a second socket 33. The second sockets 33 are symmetrically arranged on both sides of the back panel 3 and the front panel 4, and the second sockets 33 are connected to the limit rod 9 for positioning the back panel 3 and the front panel 4 during installation.

[0037] In this solution, the positioning of the side panel 2, the back panel 3, and the front panel 4 during assembly is achieved through the cooperation of the limit rod 9 with the first hole 22 and the second hole 33, so as to facilitate the rapid assembly of the device during installation. The presence of the limit rod 9 can improve the connection strength of the connection at the connection point when the device is assembled.

[0038] like Figure 4 As shown, to facilitate the installation of the sealing plate 20, the fully assembled high-voltage ring network cabinet provided in this embodiment also includes a limiting slide groove 21, which is opened on the inner side of the side panel 2, the back panel 3 and the front panel 4 near the two ends, and the limiting slide groove 21 is slidably connected to the side of the sealing plate 20.

[0039] In the present scheme, the sliding connection between the sealing plate 20 and the limiting slide groove 21 can be used for the quick installation of the sealing plate 20. In order to improve the sealing effect at the connection between the sealing plate 20 and the limiting slide groove 21, a silicone pad can be optionally provided near the two side edges of the sealing plate 20. After the sealing plate 20 is installed, the silicone pad abuts against the edge of the limiting slide groove 21, thereby improving the sealing effect at the connection between the sealing plate 20 and the limiting slide groove 21. In addition, a frosted layer can be provided on the surface of the silicone pad. The provision of the frosted layer can also improve the tightness of the connection between the sealing filler 28 and the silicone pad.

[0040] like Figure 3 and Figure 4 As shown, in order to facilitate the isolation of the internal space of the cabinet, the fully assembled high-voltage ring network cabinet provided in this embodiment also includes a supporting angle plate 23, which is an inverted "L"-shaped structure, and the supporting angle plate 23 is installed on the inner side of the sealing plate 20, and the upper ends of the four supporting angle plates 23 are installed with a bearing plate 14.

[0041] In this embodiment, the supporting angle plate 23 is preferably connected to the sealing plate 20 and the bearing plate 14 by bolts. By setting the bearing plate 14, the internal space of the cabinet is separated, which is conducive to the partitioned installation of different electrical components.

[0042] To facilitate the installation of electrical components, the fully assembled high-voltage ring main unit provided in this embodiment further includes a mounting frame 17 , which is fixed on the bearing plate 14 for fixing the electrical components.

[0043] like Figure 4 and Fig.11As shown in the figure, for the convenience of the installation of external connection cables, the fully assembled high-voltage ring main unit provided in this embodiment further includes a wiring cabinet 24. The wiring cabinet 24 is installed on the back plate 3, and one end of the wiring cabinet 24 extends into the cabinet body and is provided with a sealing groove 25. The wiring cabinet 24 is equidistantly provided with wiring through holes 26 for the installation of external connection cables.

[0044] It should be noted that preferably, the wiring cabinet 24 and the back plate 3 are integrally cast to avoid connection gaps between the wiring cabinet 24 and the back plate 3. Through the arrangement of the wiring through holes 26, it is convenient for the access of external connection cables. After the external connection cables are installed, by injecting fillers into the sealing groove 25, it is possible to avoid gaps remaining between the external connection cables and the wiring cabinet 24, so as to avoid air leakage at the wiring cabinet 24 and further improve the airtightness inside this device.

[0045] As Figure 1 - Figure 4 As shown in the figure, for the convenience of the fixation of the gas chamber 7, third jacks 36 are symmetrically opened on both sides of the top cover 6, and fourth jacks are symmetrically opened on both side walls of the gas chamber 7. The upper end of the limit rod 9 penetrates through the third jack 36 and the fourth jack; the upper end of the gas chamber 7 is equidistantly installed with pressing plates 10. The pressing plates 10 are of an inverted "U" structure. Preferably, an anti-slip pad is provided on the lower surface of the pressing plates 10 to improve the stability after the installation of the pressing plates 10. The upper end of the limit rod 9 penetrates through the pressing plates 10 and is threadedly installed with limit nuts for the fixation of the gas chamber 7.

[0046] In this solution, through the insertion of the limit rod 9 into the third jack 36 and the fourth jack, the positioning during the installation of the top cover 6 and the gas chamber 7 is realized. With the arrangement of the pressing plates 10, the upper limit of the limit rod 9 is realized, and then the movement range of the gas chamber 7 is restricted to realize the fixation of the gas chamber 7. With the setting of the limit rod 9, the stability after the installation of the gas chamber 7 can also be improved to enhance the overall structural strength of the device.

[0047] As Figure 1 and Figure 2 As shown in the figure, for the convenience of the maintenance inside the cabinet body and the gas chamber 7, a first sealing door 5 is hinged on the front surface of the front panel 4, and a second sealing door 8 is hinged on the front surface of the gas chamber 7. A visual window is provided on the front surface of the first sealing door 5 for facilitating the observation of the situation inside the cabinet body. And a pressure gauge for detecting the air pressure inside the cabinet body is installed on the first sealing door 5.

[0048] As Figure 1 - Figure 3As shown, in order to facilitate the filling of the filler into the first connecting groove 18 and the second connecting groove 29, a first filling pipe 34 is provided on the front surface of the bottom box 1 for replenishing the filler into the first lining platform 19, and a second filling pipe 35 is provided on the front surface of the top cover 6 for replenishing the filler into the second connecting groove 29. The first filling pipe 34 and the second filling pipe 35 are both composed of a filling pipe and an exhaust pipe. The filler is injected into the first connecting groove 18 and the second connecting groove 29 through the filling pipe. When the filler is injected, the exhaust pipe can be used to output the air inside the first connecting groove 18 and the second connecting groove 29 to keep the first connecting groove 18 and the second connecting groove 29 full. 9 The air pressure inside and outside is stable so that the filler can be effectively injected therein, thereby improving the sealing effect of the cabinet. The filling pipe and the exhaust pipe can also be set in an upper and lower offset manner. Specifically, the filling pipe is placed below the exhaust pipe, and the exhaust pipe is placed at the uppermost end of the first connecting groove 18 and the second connecting groove 29. During the filler injection process, the exhaust pipe exhausts air to make the first connecting groove 18 and the second connecting groove 29 in a negative pressure state, thereby accelerating the filler injection efficiency, thereby making the filler in the first connecting groove 18 and the second connecting groove 29 more substantial and tight. When filler flows out of the exhaust pipe, it indicates that the filling of the filler inside the first connecting groove 18 and the second connecting groove 29 is complete.

[0049] Furthermore, a filter screen may be provided at the inner end of the air extraction pipe so that only the gas can be extracted without extracting the filler.

[0050] When in use (working), the bottom box 1 is installed at the specified position, the first partition 15 is installed on the upper surface of the bottom box 1, and the limiting rod 9 is assembled on the first lining platform 19. The side panel 2, the back panel 3 and the front panel 4 can be quickly installed on the bottom box 1 through the connection between the limiting rod 9 and the first socket 22 and the second socket 33, and the lower ends of the side panel 2, the back panel 3 and the front panel 4 are inserted into the first connecting groove 18. The sealing plate 20 is installed at the four corners of the cabinet through the sliding connection between the limiting slide groove 21 and the sealing plate 20. At this time, according to the space height requirement, the supporting angle plate 23 is fixed on the sealing plate 20, and the bearing plate 14 is fixed on the supporting angle plate 23. The mounting frame 17 can be further installed on the bearing plate 14. At this time, the sealing filler 28 is injected into the sealing cavity 27 to avoid gas leakage at the connection gap between the side panel 2 and the back panel 3 and the front panel 4, so as to improve the air pressure stability inside the cabinet when the equipment is running.

[0051] By engaging the limiting groove 31 with the upper end of the sealing plate 20, the second partition 16 is installed on the upper end of the cabinet body, and the top cover 6 is fixed above the second partition 16 by plugging the third plug hole 36 with the limiting rod 9, and then the air chamber 7 is installed above the top cover 6 by plugging the fourth plug hole with the limiting rod 9. At this time, the pressure plate 10 is fixed above the air chamber 7 to limit the upper end of the limiting rod 9, thereby achieving the fixation of the air chamber 7, and then the filler is injected into the first connecting groove 18 and the second connecting groove 29 through the filling pipe. When the filler is injected, the exhaust pipe can be used for the output of the air inside the first connecting groove 18 and the second connecting groove 29, so that the filler inside the first connecting groove 18 and the second connecting groove 29 is more substantial and tight, so as to improve the sealing effect of the cabinet body. After the external cable is installed, by injecting filler into the sealing groove 25, a gap between the external cable and the wiring cabinet 24 can be avoided, so as to avoid air leakage at the wiring cabinet 24, and further improve the air tightness inside the device.

[0052] By cooperating with the side panels 2, back panel 3, front panel 4, bottom box 1 and top cover 6, a fully assembled structure of the cabinet is realized, so that the equipment can be produced in a modular manner and the production cost can be reduced. During transportation and construction, there is no need to transport and hoist the entire cabinet, thus saving transportation space. In addition, by cooperating with the limit rod 9 and the first socket 22, the second socket 33, the third socket 36 and the fourth socket, the positioning of the side panels 2, back panel 3, front panel 4, top cover 6 and air chamber 7 during assembly can be achieved, so as to facilitate the rapid assembly of the equipment during installation. The presence of the limit rod 9 can improve the connection strength of the assembly connection of the equipment and improve the structural stability of the equipment.

Claims

1. A fully assembled high-voltage ring main unit, characterized in that: The invention comprises a bottom box (1) and a top cover (6) arranged above the bottom box (1); the top surface of the bottom box (1) is provided with a first connection groove (18), and the bottom outer wall of the first connection groove (18) is provided with a first lining platform (19); the bottom surface of the top cover (6) is provided with a second connection groove (29), and the top outer wall of the second connection groove (29) is provided with a second lining platform (30); Also includes: A cabinet body, the cabinet body being arranged between the bottom box (1) and the top cover (6), the cabinet body comprising two side panels (2), a back panel (3) and a front panel (4), the two side panels (2) being arranged on both sides of the bottom box (1), and the back panel (3) and the front panel (4) being installed between the two side panels (2), the lower ends of the side panels (2), the back panel (3) and the front panel (4) respectively abutting against a first lining platform (19), and the upper ends of the back panel (3) and the front panel (4) respectively abutting against a second lining platform (30); A sealing plate (20) is disposed at the four corners of the cabinet, and a gap formed between the sealing plate (20) and the cabinet forms a sealing cavity (27), wherein the sealing cavity (27) is filled with a sealing filler (28) for sealing the gaps in the cabinet.

2. The fully assembled high-voltage ring main unit according to claim 1 is characterized in that: Also includes: A first partition (15), the first partition (15) being arranged at the lower end of the interior of the cabinet and located at the upper surface of the bottom box (1); A second partition (16), the second partition (16) being arranged at the top of the interior of the cabinet and located at the lower surface of the top cover (6); Limiting grooves (31) adapted to the sealing plate (20) are respectively provided at the four corners of the first partition plate (15) and the second partition plate (16), and an engaging groove (32) engaged with the inner wall of the first connecting groove (18) is provided on the lower surface of the first partition plate (15).

3. The fully assembled high-voltage ring main unit according to claim 2 is characterized in that: The cabinet further comprises an air chamber (7), wherein the air chamber (7) is fixed to the upper surface of the top cover (6), and an air storage tank (11) is installed inside the air chamber (7). An air pump (13) is also provided inside the air chamber (7), and an input end of the air pump (13) is connected to an output end of the air storage tank (11) by a pipeline, and an output end of the air pump (13) is connected to the interior of the cabinet. A controller (12) is installed inside the air chamber (7), and the controller (12) is used to control the operation of the air pump (13).

4. The fully assembled high-voltage ring main unit according to claim 3 is characterized in that: Also includes: Limit rods (9), there are at least eight limit rods (9), and the limit rods (9) are symmetrically distributed on both sides of the bottom box (1), and the lower ends of the limit rods (9) are detachably connected to the first lining platform (19); A first plug hole (22), the first plug hole (22) being symmetrically arranged on the side panel (2), and the first plug hole (22) being plugged into the limiting rod (9) for positioning the side panel (2) during installation; The second plug holes (33) are symmetrically arranged on both sides of the back panel (3) and the front panel (4), and the second plug holes (33) are plugged into the limiting rods (9) to be used for positioning the back panel (3) and the front panel (4) when they are installed.

5. The fully assembled high-voltage ring main unit according to claim 4 is characterized in that: It also includes a limiting slide groove (21), which is arranged on the inner sides of the side panels (2), the back panel (3) and the front panel (4) near the two ends, and the limiting slide groove (21) is slidably connected to the side edge of the sealing plate (20).

6. The fully assembled high-voltage ring main unit according to claim 5, characterized in that: Also includes: Support angle plate (23), the support angle plate (23) is an inverted "L" - shaped structure, and the support angle plate (23) is installed inside the sealing plate (20), and a bearing plate (14) is installed at the upper ends of the four support angle plates (23); Mounting frame (17), the mounting frame (17) is fixed on the bearing plate (14) for fixing electrical components.

7. The fully assembled high-voltage ring main unit according to claim 6, characterized in that: It further includes a wiring cabinet (24), the wiring cabinet (24) is installed on the back plate (3), and one end of the wiring cabinet (24) extends into the cabinet body and is provided with a sealing groove (25), and wiring through - holes (26) for installing external cables are equidistantly arranged on the wiring cabinet (24).

8. The fully assembled high-voltage ring main unit according to claim 7 is characterized in that: Third jacks (36) are symmetrically arranged on both sides of the top cover (6), fourth jacks are symmetrically arranged on both side walls of the air chamber (7), and the upper end of the limit rod (9) penetrates through the third jack (36) and the fourth jack; Pressure plates (10) are equidistantly installed at the upper end of the air chamber (7), the pressure plates (10) are of an inverted "凵" - shaped structure, and the upper end of the limit rod (9) penetrates through the pressure plate (10) and is threadedly connected with a limit nut for fixing the air chamber (7).

9. A fully assembled high voltage ring main unit according to any one of claims 3 to 8, characterized in that: A first sealing door (5) is hinged to the front surface of the front panel (4), a second sealing door (8) is hinged to the front surface of the air chamber (7), a visual window is provided on the front surface of the first sealing door (5), and a pressure gauge for detecting the internal air pressure of the cabinet is installed on the first sealing door (5).

10. The fully assembled high-voltage ring main unit according to claim 9, characterized in that: A first filling pipe fitting (34) is provided on the front surface of the bottom box (1) for replenishing filler into the first lining table (19), a second filling pipe fitting (35) is provided on the front surface of the top cover (6) for replenishing filler into the second connecting groove (29), and both the first filling pipe fitting (34) and the second filling pipe fitting (35) are composed of a filling pipe and an air extraction pipe.

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