Gas protection ring main unit convenient for overhauling

Abstract

The application relates to the technical field of ring network cabinets, in particular to a gas protection ring network cabinet convenient for maintenance, which comprises a gas tank shell, the gas tank shell is the main body of the ring network cabinet, the outer wall of the gas tank shell is sequentially provided with an instrument room, a mechanism room and a cable room from top to bottom on one side, a front cabinet body frame is fixedly arranged on the front side of the gas tank shell, a cabinet door is hingedly arranged on the front cabinet body frame, and a first disconnecting switch and a second disconnecting switch are arranged on the inner wall of the gas tank shell respectively. The application can realize real-time monitoring of the concentration of the protection gas around the electrical elements through a plurality of detection holes on the partition plate and a gas sensor, once leakage occurs, the gas sensor can immediately transmit a signal to a display panel, maintenance personnel can quickly locate the fault position in the ring network cabinet through the digital display lamp without opening the cabinet door, and the safety and efficiency of the maintenance are improved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of ring main units, and particularly relates to a gas protection ring main unit convenient to overhaul. BACKGROUND

[0002] The gas protection ring main unit (GIRMU) is an electrical device for a medium-voltage power system, which is mainly used for distributing electric energy and protecting circuits. Compared with a traditional air-insulated switchgear, the gas protection ring main unit uses environmentally friendly gas with better insulation performance as an insulating medium, so that higher voltage levels and greater current carrying capacity can be realized in a smaller space. The device is usually applied to urban power distribution networks, industrial facilities and other occasions requiring compactness, high reliability and low maintenance.

[0003] According to the search, the application with the authorized publication number CN115275813B discloses a ring main unit convenient to overhaul, which comprises a gas tank shell and a mechanism. A rear hole is uniformly and equidistantly formed in the lower side of the rear inner wall of the gas tank shell. A door plate is hingedly connected to the left and right edges of the front port of the gas tank shell. The two door plates are symmetrically arranged and are attached to the middle part of the front port of the gas tank shell. A main mechanism group is arranged in the gas tank shell. The ring main unit is modularized and movable to improve the spatial flexibility during overhaul. However, there are still some limitations in use. Since no built-in or integrated fault detection system is provided, when a fault occurs, maintenance personnel must rely on external professional equipment to check each element one by one. This method not only consumes time, but also may cause misjudgment due to human factors. In addition, if each step is not strictly performed according to the regulations during overhaul, when the cabinet door is opened for internal overhaul, if the operator accidentally touches the live part or other dangerous areas, an electric shock or other safety accidents may occur. SUMMARY

[0004] In order to solve the above-mentioned problems in the prior art, the application provides a gas protection ring main unit convenient to overhaul.

[0005] A gas protection ring main unit convenient to overhaul, comprising a gas tank shell and a cabinet door, the gas tank shell is the main body of the ring main unit, the outer wall of the gas tank shell is provided with an instrument room, a mechanism room and a cable room from top to bottom, a front cabinet frame is fixedly arranged on the front side of the gas tank shell, the cabinet door is hingedly connected to the front cabinet frame, and first and second disconnectors are arranged on the inner wall of the gas tank shell; further comprising: a first partition plate fixedly arranged on the inner wall of the rear side of the gas tank shell; two second partition plates fixedly arranged on the inner walls of the left and right sides of the gas tank shell, the first and second partition plates are used for separating the gas tank shell and the electrical elements installed therein, a gas-tight partition plate is sealingly arranged between the two second partition plates, and the cavity surrounded by the first and second partition plates and the gas-tight partition plate in the gas tank shell is a closed stainless steel gas tank; three groups of branch wires, one group of branch wires is arranged on the first partition plate, and the other two groups of branch wires are arranged on the second partition plates, a plurality of detection holes are uniformly arranged on the first and second partition plates; gas sensors, the number of the gas sensors is the same as that of the detection holes, each gas sensor corresponds to a detection hole, and the gas sensors are used for monitoring whether the corresponding position of the gas tank shell leaks protection gas; a total wire electrically connected with the three groups of branch wires; a display panel arranged on the outer wall of the gas tank shell, the display panel is provided with three groups of display panels corresponding to the three groups of branch wires, the total wire and the display panel are electrically connected, and the display panel is used for displaying whether the electrical elements in the cabinet leak protection gas; and a plurality of digital display lamps arranged on each display panel, each digital display lamp corresponds to the monitoring condition of the gas sensor on the same group of branch wires.

[0006] Optionally, the first disconnecting switch is provided with a first contactor corresponding to a first contact plate on the first disconnecting switch, the first contactor contacts the first contact plate to enable high-voltage power supply to the electrical elements in the ring main unit, the second disconnecting switch is provided with a second contactor corresponding to a second contact plate on the second disconnecting switch, the second contactor contacts the second contact plate to enable grounding of the electrical elements in the ring main unit, the inner wall of the gas tank shell is provided with a first mounting plate and a second mounting plate fixedly arranged at positions corresponding to the first and second disconnecting switches, respectively, the first and second mounting plates are provided with power-off assemblies, the power-off assemblies are used for automatically disconnecting the first disconnecting switch and connecting the second disconnecting switch during overhaul, so that the electrical elements in the ring main unit are disconnected from high-voltage current and then connected to ground, and the ring main unit can be safely powered off during overhaul.

[0007] Optionally, the power-off assembly comprises: a first guide frame fixedly installed on the first installation plate, a sliding groove being arranged in the first guide frame; a first toggle frame slidingly installed in the sliding groove of the first guide frame, the first toggle frame being connected with a corresponding first contact breaker; a first electric push rod fixedly installed on the first installation plate, a push rod of the first electric push rod being connected with the first toggle frame, the first electric push rod being used to control the on and off of the first disconnector; a second guide frame fixedly installed on the second installation plate, a sliding groove also being arranged in the second guide frame; a second toggle frame slidingly installed in the sliding groove of the second guide frame, the second toggle frame being connected with a corresponding second contact breaker; a second electric push rod fixedly installed on the second installation plate, a push rod of the second electric push rod being connected with the second toggle frame, the second electric push rod being used to control the on and off of the second disconnector; before the maintenance of the ring main unit, the first electric push rod is elongated and pushes the first contact breaker through the first toggle frame, so that the first contact breaker is lifted upward and separated from the first contact plate, thereby disconnecting the high-voltage power supply of the electrical elements in the ring main unit, the second electric push rod is shortened and pulls the second contact breaker through the second toggle frame, so that the second contact breaker falls downward and contacts the first contact plate, thereby closing the electrical elements and the grounding wire in the ring main unit, and the safety of the maintenance of the electrical elements in the ring main unit is improved.

[0008] Optionally, a locking member is arranged on the inner wall of the gas tank shell near the cabinet door, the locking member comprises a connecting frame, a clamping rod and a clamping block, the second toggle frame is fixedly connected with the connecting frame, the lower end of the connecting frame is fixedly connected with the clamping rod, the inner wall of the cabinet door is provided with the clamping block, a clamping groove is formed in the bottom of the clamping block, the end of the clamping rod away from the connecting frame is inserted into and buckled in the clamping groove of the clamping block, when the second electric push rod does not drive the second toggle frame downward, the second contact breaker does not contact the first contact plate to achieve grounding, the clamping rod is buckled in the clamping block, at this time, the grounding in the ring main unit is not completed, and the electrical elements in the ring main unit may still have a risk of static electricity, so that the cabinet door on the ring main unit cannot be opened in advance.

[0009] Optionally, an assembly frame is fixedly connected to the inside of the front cabinet body frame, a plurality of dense insertion holes are continuously formed in the frame body of the assembly frame, a plurality of first assembly cross plates and second assembly cross plates are arranged in the assembly frame, bolt grooves for assembling different electrical elements are formed in the first assembly cross plates and the second assembly cross plates, buckling members are arranged on the first assembly cross plates and the second assembly cross plates, the buckling members are used to flexibly assemble the first assembly cross plates and the second assembly cross plates into the assembly frame, and the convenience of assembling the electrical elements to the ring main unit is improved.

[0010] Optionally, the buckle comprises a guide rod, a sliding block, a plug rod and a spring, the second assembly horizontal plate is fixed with a fixed plate, two guide rods are symmetrically and slidingly connected to the fixed plate of the second assembly horizontal plate, the sliding block is fixed to the fixed plate of the second assembly horizontal plate, the plug rod is fixed to the sliding block and matched with the insertion hole of the assembly frame, and the spring is arranged between the sliding block and the fixed plate, so that the plug rod on the sliding block can be inserted into the insertion hole of the assembly frame, the second assembly horizontal plate can be conveniently disassembled in the assembly frame, and the electrical elements on the second assembly horizontal plate can be quickly disassembled by the maintenance personnel for maintenance.

[0011] The beneficial effects of the present application are:

[0012] 1、The present application can monitor the concentration of protective gas around the electrical element in real time through the plurality of detection holes on the partition plate and the gas sensor, and once leakage occurs, the gas sensor immediately transmits a signal to the display panel, so that the maintenance personnel can quickly locate the fault position in the ring main unit through the digital display lamp without opening the cabinet door, thereby improving the safety and efficiency of maintenance.

[0013] 2、The present application can control the first disconnecting switch to be turned off by the first electric push rod and the second disconnecting switch to be turned on by the second electric push rod to make the electrical element grounded before maintenance, so that the electrical element in the ring main unit is completely powered off and grounded before the cabinet door is opened for maintenance, thereby greatly reducing the risk of electric shock of the maintenance personnel and improving the safety of the ring main unit during maintenance.

[0014] 3、The present application can also be designed with a locking member, so that the clamping rod is released from the clamping groove of the clamping block only when the second contactor successfully contacts the contact plate to complete grounding, that is, after the complete power-off process in the ring main unit, the cabinet door is allowed to be opened, thereby preventing the cabinet door from being opened in advance before maintenance, further enhancing the safety of the system and ensuring the safety and reliability of the maintenance environment. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present application.

[0016] Figure 2 It is a schematic diagram of the main components inside the gas tank shell.

[0017] Figure 3 It is a schematic diagram of the partition plate one, the partition plate two, the wire frame and the gas sensor.

[0018] Figure 4 It is a connection relationship diagram of the sub-wire, the gas sensor, the total wire and the display panel.

[0019] Figure 5 It is a position relationship diagram of the first disconnecting switch and the second disconnecting switch.

[0020] Figure 6 Figure 1 is a schematic diagram of the cooperation relationship of the first isolating switch, the first contactor and the first driving frame of the application.

[0021] Figure 7 Figure 2 is a connection diagram of the cabinet door, the second electric push rod and the locking member of the application.

[0022] Figure 8 Figure 3 is a schematic diagram of the cabinet door, the second electric push rod, the clamping rod and the clamping block of the application.

[0023] Figure 9 Figure 4 is a schematic diagram of the first assembly horizontal plate, the second assembly horizontal plate and the clamping member of the application.

[0024] Figure 10 Figure 5 is a schematic diagram of the specific components of the clamping member of the application.

[0025] Markings in the drawings: 1: gas tank shell, 100: instrument chamber, 200: mechanism chamber, 300: cable chamber, 101: top plate, 102: bottom plate, 103: mounting plate one, 104: mounting plate two, 2: front cabinet body frame, 21: assembly frame, 3: cabinet door, 4: partition one, 41: partition two, 401: airtight partition, 42: branch wire, 43: gas sensor, 44: detection hole, 45: main wire, 46: display plate, 47: digital display lamp, 5: first isolating switch, 51: first contactor, 511: first contact plate, 52: second isolating switch, 53: second contactor, 531: second contact plate, 6: power-off assembly, 61: first guide frame, 62: first driving frame, 63: first electric push rod, 64: second guide frame, 65: second driving frame, 66: second electric push rod, 7: locking member, 71: connecting frame, 72: clamping rod, 73: clamping block, 8: first assembly horizontal plate, 81: second assembly horizontal plate, 811: fixed plate, 9: clamping member, 91: guide rod, 92: sliding block, 93: insertion rod, 94: spring. DETAILED DESCRIPTION

[0026] Embodiments of the application are described below with reference to the accompanying drawings. First, it is pointed out that in the various described embodiments, identical components are provided with identical reference signs or identical component names, wherein the disclosure contained in the entire description can be transferred by meaning to identical components having identical reference signs or identical component names. The chosen position descriptions in the description, for example, above, below, lateral, etc., also refer to the directly described and shown drawings and are transferred by meaning to new positions when the position changes.

[0027] Example 1: A gas protection ring main unit convenient for maintenance, like Figures 1-4As shown, including the gas tank shell 1 and cabinet door 3, the gas tank shell 1 is the main body of the ring main unit, the outer wall of the gas tank shell 1 is sequentially provided with an instrument room 100, a mechanism room 200 and a cable room 300 from top to bottom, the front side of the gas tank shell 1 is fixedly provided with a front cabinet frame 2, the cabinet door 3 is hingedly installed on the front cabinet frame 2, and the inner wall of the gas tank shell 1 is respectively provided with a first disconnecting switch 5 and a second disconnecting switch 52; further comprising: a partition plate one 4 fixedly arranged on the inner wall of the rear side of the gas tank shell 1; two partition plates two 41 are arranged on the left and right inner walls of the gas tank shell 1 respectively, the partition plate one 4 and the partition plate two 41 are used for separating the gas tank shell 1 and the electrical elements installed inside, and the two partition plates two 41 are sealingly provided with a gas-tight partition plate 401, the cavity surrounded by the partition plate one (4), the partition plate two (41) and the gas-tight partition plate (401) in the gas tank shell 1 is a closed stainless steel gas tank; a plurality of branch wires 42 are provided, one of which is installed on the partition plate one 4, and the other two are installed on the partition plate two 41, a plurality of detection holes 44 are uniformly arranged on the partition plate one 4 and the partition plate two 41; a plurality of gas sensors 43 are electrically installed on the branch wires 42, the number of the gas sensors 43 is consistent with the number of the detection holes 44, each gas sensor 43 corresponds to a detection hole 44, and the gas sensor 43 monitors whether the protection gas leaks at the corresponding position of the gas tank shell 1; a total wire 45 is electrically connected to the three branch wires 42; a display panel 46 is arranged on the outer wall of the gas tank shell 1, the display panel 46 is provided with three groups corresponding to the three branch wires 42, the total wire 45 and the display panel 46 are electrically connected, and the display panel 46 is used for displaying whether the electrical elements in the cabinet body leak protection gas; a plurality of digital display lamps 47 are arranged on each display panel 46, each digital display lamp 47 corresponds to the monitoring condition of the gas sensor 43 on the same group of branch wires 42, when the electrical elements in the gas tank shell 1 fail and leak protection gas, the gas sensor 43 near the detection hole 44 on the partition plate one 4 or the partition plate two 41 monitors the concentration of the protection gas in real time, and the detection electrical signal is transmitted to the display panel 46 through the branch wire 42 and the total wire 45, and the maintenance personnel can know in advance that the electrical elements at the specific position in the gas tank shell 1 leak protection gas without opening the cabinet door 3, so that the electrical elements leaking protection gas can be accurately positioned and repaired during maintenance.

[0028] When the ring main unit is overhauled, the inner wall of the gas tank shell 1, the partition plate one 4 and the two partition plate twos 41 are fixedly installed at the rear and left and right inner walls of the gas tank shell 1, a plurality of detection holes 44 are arranged on the partition plate one 4 and the two partition plate twos 41, and each detection hole 44 is uniformly distributed at each part of the inner wall of the gas tank shell 1. The gas sensor 43 corresponding to each detection hole 44 is used to monitor the real-time concentration of the protection gas in the gas tank shell 1. When a certain electrical element fails and causes the protection gas to leak, the gas sensor 43 near the faulty electrical element can quickly capture the change in the concentration of the protection gas. The sensor converts the physical change into an electrical signal and transmits it to the total conductor 45 through the branch conductor 42 where it is located. The total conductor 45 is responsible for collecting signals from different areas and finally transmitting them to one of the three display panels 46 installed on the outer wall of the gas tank shell 1. Each group of display panels 46 corresponds to a group of branch conductors 42, and the digital display lamp 47 on the display panel 46 is one-to-one mapped to the state of each gas sensor 43 on the branch conductor 42. If the electrical element at a certain position leaks protection gas, the corresponding digital display lamp 47 will change color or flash and display the current detection parameters, so as to intuitively remind the maintenance personnel which position of the electrical element in the cabinet needs to be overhauled. This non-intrusive monitoring method allows the maintenance personnel to understand the internal situation in advance without opening the cabinet door 3, so as to prepare the maintenance tools and plan in a targeted manner, effectively improve the work efficiency, and reduce unnecessary safety hazards.

[0029] As shown in Figure 2 , Figure 5 and Figure 6 , the first disconnector 5 is provided with a first contactor 51 corresponding to a first contact plate 511 on the first disconnector 5. The first contactor 51 contacts the first contact plate 511 to enable high-voltage power supply to the electrical elements in the entire ring main unit. The second disconnector 52 is provided with a second contactor 53 corresponding to a second contact plate 531 on the second disconnector 52. The second contactor 53 contacts the second contact plate 531 to enable grounding of the electrical elements in the entire ring main unit. The inner wall of the gas tank shell 1 is provided with a mounting plate one 103 and a mounting plate two 104 corresponding to the first disconnector 5 and the second disconnector 52, respectively. The mounting plate one 103 and the mounting plate two 104 are provided with a power-off assembly 6 for automatically disconnecting the first disconnector 5 and connecting the second disconnector 52 during maintenance, so that the electrical elements in the ring main unit are disconnected from the high-voltage current and then connected to the ground wire, thereby enabling safe power-off during the entire ring main unit maintenance.

[0030] As shown in Figure 2 , Figure 5 and Figure 6As shown, the power-off assembly 6 comprises: a first guide frame 61 fixedly installed on the mounting plate one 103, a sliding groove being arranged in the first guide frame 61; a first toggle lever 62 slidingly installed in the sliding groove of the first guide frame 61, the first toggle lever 62 being connected with the corresponding first contact breaker 51; a first electric push rod 63 fixedly installed on the mounting plate one 103, a push rod of the first electric push rod 63 being connected with the first toggle lever 62, the first electric push rod 63 being used for controlling the on and off of the first disconnector 5; a second guide frame 64 fixedly installed on the mounting plate two 104, a sliding groove also being arranged in the second guide frame 64; a second toggle lever 65 slidingly installed in the sliding groove of the second guide frame 64, the second toggle lever 65 being connected with the corresponding second contact breaker 53; a second electric push rod 66 fixedly installed on the mounting plate two 104, a push rod of the second electric push rod 66 being connected with the second toggle lever 65, the second electric push rod 66 being used for controlling the on and off of the second disconnector 52. Before the maintenance of the ring main unit, the first electric push rod 63 is elongated and pushes the first contact breaker 51 through the first toggle lever 62, so that the first contact breaker 51 is lifted upward and separated from the first contact plate 511, thereby disconnecting the high-voltage power supply of the electrical elements in the ring main unit, and the second electric push rod 66 is shortened and pulls the second contact breaker 53 through the second toggle lever 65, so that the second contact breaker 53 falls downward and contacts the first contact plate 511, thereby closing the electrical elements and the grounding wire in the ring main unit, thereby improving the safety of the maintenance of the electrical elements in the ring main unit.

[0031] When the maintenance personnel locate the specific position of the faulty electrical element in the ring main unit body through the digital display lamp 47 on the display panel 46, before opening the cabinet door 3 for maintenance, it is necessary to ensure that the high-voltage current in the ring main unit has been completely cut off, that is, a standard power-off process is required. First, the first electric push rod 63 installed on the mounting plate one 103 is started, the first electric push rod 63 controls the action of the first contact breaker 51 by pushing the connected first toggle lever 62. With the extension of the first electric push rod 63, the first toggle lever 62 moves upward, thereby driving the first contact breaker 51 to separate from the first contact plate 511, realizing the disconnection of the first disconnector 5, that is, cutting off the high-voltage power supply of all electrical elements. Then, the second electric push rod 66 installed on the mounting plate two 104 starts to work. The contraction of the second electric push rod 66 pulls the second toggle lever 65, so that the second contact breaker 53 moves downward and contacts the second contact plate 531, thereby closing the second disconnector 52, connecting the electrical elements in the ring main unit with the grounding wire, thereby ensuring that the electrical elements to be maintained in the ring main unit are completely powered off before maintenance, and the risk of static electricity remaining in the cabinet body is also minimized.

[0032] Example 2: Based on example 1, as Figure 2 , Figure 7 and Figure 8As shown, the inner wall of the gas tank shell 1 is provided with a locking part 7 near the cabinet door 3, the locking part 7 includes a connecting frame 71, a clamping rod 72 and a clamping block 73, the second actuating frame 65 is fixedly connected with the connecting frame 71, the lower end of the connecting frame 71 is fixedly connected with the clamping rod 72, the inner wall of the cabinet door 3 is provided with the clamping block 73, the bottom of the clamping block 73 is provided with a clamping groove, the end of the clamping rod 72 away from the connecting frame 71 is inserted into and buckled in the clamping groove of the clamping block 73, when the second electric push rod 66 does not drive the second actuating frame 65 downward, the second contactor 53 does not contact the first contact plate 511 to achieve grounding, the clamping rod 72 is buckled in the clamping block 73, at this time, the grounding in the ring main unit is not completed, the electrical components in the interior may still have the risk of static electricity, so that the cabinet door 3 on the ring main unit cannot be opened in advance.

[0033] As shown in Figure 2 and Figure 9 , the inside of the front cabinet body frame 2 is fixedly connected with an assembly frame 21, a plurality of dense jack holes are continuously formed on the frame body of the assembly frame 21, a plurality of first assembly cross plates 8 and second assembly cross plates 81 are arranged in the assembly frame 21, bolt grooves for assembling different electrical components are formed on the first assembly cross plates 8 and the second assembly cross plates 81, and buckle parts 9 are arranged on the first assembly cross plates 8 and the second assembly cross plates 81, the buckle parts 9 are used for flexibly assembling the first assembly cross plates 8 and the second assembly cross plates 81 into the assembly frame 21, and the convenience of assembling the electrical components to the ring main unit is improved.

[0034] As shown in Figure 2 , Figure 9 and Figure 10 , the buckle part 9 includes a guide rod 91, a sliding block 92, an insertion rod 93 and a spring 94, a fixed plate 811 is fixedly arranged on the second assembly cross plate 81, two guide rods 91 are symmetrically and slidingly connected to the fixed plate 811 of the second assembly cross plate 81, the sliding block 92 is fixedly arranged on the second assembly cross plate 81, the insertion rod 93 is fixedly arranged on the sliding block 92 and is matched with the jack hole of the assembly frame 21, the spring 94 is arranged between the sliding block 92 and the fixed plate 811, under the action of the spring 94, the insertion rod 93 on the sliding block 92 can be inserted into the jack hole of the assembly frame 21, the second assembly cross plate 81 can be conveniently disassembled in the assembly frame 21, so that the maintenance personnel can quickly disassemble the electrical components on the second assembly cross plate 81 for maintenance.

[0035] When the second electric push rod 66 does not drive the second toggle frame 65 to move downward, the clamping rod 72 on the connecting frame 71 will be buckled at the clamping block 73 on the cabinet door 3, so that the cabinet door 3 cannot be opened before the standard power-off process is completed. Only when the second electric push rod 66 correctly performs the grounding operation, that is, the second contactor 53 successfully contacts the contact plate, can the second electric push rod 66 drive the clamping rod 72 to release from the clamping block 73, at which time the cabinet door 3 is allowed to be opened, thereby preventing the danger of mistakenly opening the cabinet door 3 in the case of incomplete grounding, and also ensuring that the internal electrical elements are in a safe state at any time when the cabinet door 3 is opened. In order to improve the convenience and maintenance efficiency of the electrical elements assembled on the ring main unit, a plurality of first assembly horizontal plates 8 and second assembly horizontal plates 81 are assembled in the assembly frame 21. By providing bolt grooves on the first assembly horizontal plates 8 and the second assembly horizontal plates 81, the electrical elements are fixed thereon by screws or bolts, so that the first assembly horizontal plates 8 and the second assembly horizontal plates 81 can serve as platforms for carrying different types of electrical elements. When installing, the user only needs to press the two guide rods 91 towards each other, adjust the position to be assembled, align the insertion rod 93 on the sliding block 92 with the insertion hole of the assembly frame 21, and then release the two guide rods 91. Under the action of the spring 94, the insertion rod 93 is inserted into the corresponding insertion hole of the assembly frame 21 and is automatically locked. When disassembling for maintenance, the user presses the two guide rods 91 to overcome the resistance of the spring 94, so that the insertion rod 93 is withdrawn from the insertion hole, and the first assembly horizontal plate 8 or the second assembly horizontal plate 81 can be easily removed, improving the speed of assembling and disassembling electrical elements in the cabinet body, and reducing the dependence on traditional tools, so that the on-site maintenance personnel can quickly complete the installation and removal of electrical elements without using additional tools, significantly improving work efficiency.

[0036] Although the present disclosure has been shown and described with respect to certain exemplary embodiments thereof, it should be understood by those skilled in the art that various changes in form and detail can be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims and their equivalents. Therefore, the scope of the present disclosure should not be limited to the above-described embodiments, but should be determined by the appended claims and their equivalents.

Claims

1. A gas protection ring main unit that is easy to maintain, comprising a gas box shell (1) and a cabinet door (3), wherein the outer wall of the gas box shell (1) consists of an instrument room (100), a mechanism room (200) and a cable room (300) from top to bottom on one side, a front cabinet frame (2) is fixedly provided on the front side of the gas box shell (1), and a cabinet door (3) is hinged on the front cabinet frame (2), and a first disconnect switch (5) and a second disconnect switch (52) are respectively provided on the upper and lower parts of the inner wall of the gas box shell (1); Its features are, Also includes: Partition 1 (4) is fixed to the rear inner wall of the gas box shell (1); Partition 2 (41) is provided in two parts and is fixed to the left and right inner walls of the air box shell (1) respectively. An airtight partition (401) is sealed between the two partitions 2 (41). The chamber enclosed by partition 1 (4), partition 2 (41) and airtight partition (401) in the air box shell (1) is a closed air box. The wires (42) are provided in three groups. One group of wires (42) is installed on the first partition (4), and the other two groups of wires (42) are installed on the second partition (41). Multiple detection holes (44) are evenly arrayed on the first partition (4) and the second partition (41). Gas sensor (43), gas sensors (43) with corresponding detection holes (44) are electrically installed on the three sets of branch wires (42). The number of gas sensors (43) is the same as the number of detection holes (44), and each gas sensor (43) corresponds to a detection hole (44). Main conductor (45), electrically connected three-component conductors (42); The display panel (46) is disposed on the outer wall of the gas box shell (1). The display panel (46) is provided with three sets of wires (42) corresponding to the three sets of wires respectively. The main wire (45) is electrically connected to the display panel (46). Digital display lamps (47), each display panel (46) is equipped with multiple digital display lamps (47); The first disconnector (5) is equipped with a first knife switch (51), which corresponds to the first contact plate (511) on the first disconnector (5). The second disconnector (52) is equipped with a second knife switch (53), which corresponds to the second contact plate (531) on the second disconnector (52). The inner wall of the gas box shell (1) is fixedly installed with mounting plate one (103) and mounting plate two (104) respectively corresponding to the first disconnector (5) and the second disconnector (52). The mounting plate one (103) and mounting plate two (104) are provided with a power-off component (6). The power-off component (6) is used to automatically disconnect the first disconnector (5) and connect the second disconnector (52) during maintenance.

2. The gas protection ring main unit for easy maintenance according to claim 1, characterized in that, The power-off component (6) includes: The first guide frame (61) is fixedly installed on the mounting plate (103), and the first guide frame (61) is provided with a sliding groove; The first actuating frame (62) is slidably installed in the groove of the first guide frame (61), and the first actuating frame (62) is connected to the corresponding first knife switch (51); The first electric push rod (63) is fixedly installed on the mounting plate (103). The push rod of the first electric push rod (63) is connected to the first actuating frame (62). The first electric push rod (63) is used to control the opening and closing of the first disconnecting switch (5). The second guide frame (64) is fixedly installed on the second mounting plate (104), and the second guide frame (64) is also provided with a sliding groove; The second actuating bracket (65) is slidably installed in the groove of the second guide frame (64), and the second actuating bracket (65) is connected to the corresponding second knife switch (53); The second electric push rod (66) is fixedly installed on the second mounting plate (104). The push rod of the second electric push rod (66) is connected to the second toggle frame (65). The second electric push rod (66) is used to control the connection and disconnection of the second disconnecting switch (52).

3. The gas protection ring main unit for easy maintenance according to claim 2, characterized in that, The inner wall of the gas box shell (1) near the cabinet door (3) is provided with a locking component (7). The locking component (7) includes a connecting frame (71), a locking rod (72) and a locking block (73). The connecting frame (71) is fixedly connected to the second actuating frame (65). The locking rod (72) is fixedly connected to the lower end of the connecting frame (71). The locking block (73) is installed on the inner wall of the cabinet door (3). The bottom of the locking block (73) has a slot. The end of the locking rod (72) away from the connecting frame (71) is inserted into and locked in the slot of the locking block (73).

4. A gas protection ring main unit that is easy to maintain according to claim 3, characterized in that, The front cabinet frame (2) is internally fixed with an assembly frame (21). The frame of the assembly frame (21) has multiple insertion holes. The assembly frame (21) is internally provided with multiple first assembly horizontal plates (8) and second assembly horizontal plates (81). The first assembly horizontal plates (8) and second assembly horizontal plates (81) are provided with bolt grooves for assembling different electrical components. The first assembly horizontal plates (8) and second assembly horizontal plates (81) are provided with fasteners (9). The fasteners (9) are used to flexibly assemble the first assembly horizontal plates (8) and second assembly horizontal plates (81) into the assembly frame (21).

5. A gas protection ring main unit for easy maintenance according to claim 4, characterized in that, The buckle (9) includes a guide rod (91), a sliding block (92), a plug rod (93) and a spring (94). A fixing plate (811) is fixed on the second assembly horizontal plate (81). Two guide rods (91) are symmetrically slidably connected on the fixing plate (811) of the second assembly horizontal plate (81). A sliding block (92) is fixed near the two ends of the guide rod (91) on both sides. A plug rod (93) adapted to the insertion hole of the assembly frame (21) is fixed on the sliding block (92). A spring (94) is provided between the sliding block (92) and the fixing plate (811).

Images