Post-cable-outlet gas-insulated switchgear for primary-secondary integrated ring main unit

Abstract

The present invention belongs to the technical field of electrical equipment, especially a post-cable outlet gas-insulated switchgear for primary-secondary integrated ring main units. Aiming at the inconvenience in inflating the gas-insulated switchgear and the drawback that the gas filled into the gas-insulated switchgear cannot be circulated and dehumidified during daily use in the prior art, it includes a substation. Two door panels are symmetrically hinged at the opening of the substation, and a plurality of primary equipment are installed side by side at equal intervals in the substation. An air box is fixedly installed on the primary equipment. After connecting a plurality of primary equipment, the present invention can keep the adjacent docking pipes and the closed covers in communication. At this time, after dry air is input from one side of the docking pipe, dry gas can be supplied to a plurality of air boxes simultaneously, and during daily use, the gas in the air boxes can be circulated and dehumidified, so that the secondary equipment located in the air boxes can operate stably.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment, and particularly relates to a post-cable-outlet gas-insulated switchgear for primary-secondary integrated ring main units. Background Art

[0002] The post-cable-outlet gas-insulated switchgear for primary-secondary integrated ring main units is an advanced power equipment. It combines the characteristics of a ring main unit and a gas-insulated switchgear, and adopts a design of post-cable-outlet. This equipment is mainly used in the distribution network of the power system to achieve the distribution, control, and protection of electric energy. It combines the advantages of a compact structure and convenient installation of the ring main unit, and excellent insulation performance and reliable operation of the gas-insulated switchgear. At the same time, through the design of post-cable-outlet, the flexibility and convenience of cable connection are improved.

[0003] Currently, during the actual use of the existing gas-insulated switchgear, it is necessary to fill dry air into the gas-insulated switchgear to protect the electrical components installed in it. However, during the inflation process, it is often necessary to fill dry gas into multiple gas-insulated switchgears, which makes the inflation process rather troublesome.

[0004] Furthermore, during the use of the gas-insulated switchgear, there is no corresponding gas treatment device installed inside the gas-insulated switchgear. As a result, during the long-term use of the gas-insulated switchgear, the humidity of the gas inside it increases, and it is impossible to perform timely cyclic filtration on the gas inside the gas-insulated switchgear. Therefore, we propose a post-cable-outlet gas-insulated switchgear for primary-secondary integrated ring main units to solve the above-mentioned problems. Summary of the Invention

[0005] The present invention provides a post-cable-outlet gas-insulated switchgear for primary-secondary integrated ring main units, which solves the disadvantages of certain inconvenience during the inflation of the gas-insulated switchgear in the prior art and the inability to perform cyclic dehumidification on the gas filled into the gas-insulated switchgear during daily use.

[0006] The present invention provides the following technical solutions:

[0007] A post-cable-outlet gas-insulated switchgear for primary-secondary integrated ring main units includes a substation, and a plurality of primary equipment are installed in parallel at equal intervals inside the substation. A gas box is fixedly installed on the primary equipment. A cable conductor penetrates through the bottom inner wall on one side of the gas box. The gas box is used for installing secondary equipment. This gas-insulated switchgear further includes:

[0008] An air intake mechanism, the air intake mechanism includes an opening and closing component. The opening and closing component penetrates through the top inner wall of the corresponding gas box and is connected to the top inner wall of the gas box. One side of the opening and closing component is connected to a docking pipe. A plugging component is installed inside the docking pipe. One end of the plugging component extends to the outside of the docking pipe and is clamped with one end of another docking pipe;

[0009] Filter mechanism, the filter mechanism includes a filter element assembly installed on one side of the air box. The bottom of the filter element assembly is connected with an air delivery assembly. One side of the air delivery assembly extends into the air box. An attracting pump is fixedly installed on the inner wall of the top of the air box. The attracting end of the attracting pump extends above the air box and is respectively connected with two filter element assemblies.

[0010] In a possible design, the opening and closing assembly includes a support pipe penetrating and fixedly connected with the inner wall of the top of the air box. A spherical shell is fixedly installed at the top end of the support pipe. A ball valve is rotatably connected inside the spherical shell. An L-shaped hole is opened on the ball valve, and the L-shaped hole is always connected with the support pipe. A valve rod is fixedly installed at the top of the ball valve. The top end of the valve rod penetrates the inner wall of the top of the spherical shell and extends above the spherical shell. A knob is fixedly installed at the top end of the valve rod. A connecting pipe is fixedly installed on one inner wall of the spherical shell. One end of the connecting pipe extends outside the spherical shell and is fixedly connected with a docking pipe.

[0011] In a possible design, the plugging assembly includes a sealing ring fixedly installed inside the docking pipe. A sealing cover is slidably connected to the sealing ring in a sealed manner. A plurality of flow holes are equidistantly opened on the inner wall of the sealing cover. The sealing ring is used to plug the plurality of flow holes. One side of the sealing cover extends outside the docking pipe. A clamping ring is fixedly installed at one end of the docking pipe. One side of the sealing cover is clamped with the clamping ring on another docking pipe.

[0012] In a possible design, a support ring is fixedly installed inside the docking pipe. A fixing rod is fixedly installed on one side of the support ring. A sleeve ring is fixedly installed on one inner wall of the sealing cover. One end of the fixing rod penetrates the inner wall of one side of the sealing cover and the sleeve ring and extends into the sealing cover. The fixing rod is in close sliding connection with the inner wall of the sleeve ring. A first tension spring is sleeved on the fixing rod and is located inside the sealing cover. Two ends of the first tension spring are respectively fixedly connected with one side of the sleeve ring and one end of the fixing rod.

[0013] In a possible design, the filter element assembly includes a support plate fixedly installed on one side of the air box. Two clamping covers are symmetrically and fixedly installed on the top of the support plate. A filter pipe is clamped inside the clamping covers. The top end of the filter pipe extends above the clamping covers. A plurality of dehumidification plates are equidistantly arranged inside the filter pipe. The same installation rod penetrates through the plurality of dehumidification plates. A cover plate is clamped at the top end of the filter pipe. A hose is fixedly connected through the inner wall of the top of the cover plate. The top ends of the two hoses extend above the air box and are fixedly communicated with the same cylindrical box. The attracting end of the attracting pump extends into the cylindrical box and is fixedly connected with the inner wall of the bottom of the cylindrical box. A second humidity sensor is fixedly installed on one inner wall of the air box. The second humidity sensor is electrically connected with the attracting pump. The same U-shaped pipe is fixedly installed on the inner wall of the bottom of the two clamping covers. The bottom end of the U-shaped pipe extends below the support plate. An air delivery pipe is fixedly installed on the inner wall of the bottom of the U-shaped pipe. The bottom end of the air delivery pipe is connected with the air delivery assembly.

[0014] In a possible design, the same connecting plate is fixedly connected to two cover plates, a threaded component is connected through the connecting plate, and the bottom of the threaded component is connected to the top of the support plate.

[0015] In a possible design, the threaded component includes a threaded cover that passes through and is rotatably connected to the connecting plate. A support screw is threadedly connected inside the threaded cover, and the bottom end of the support screw extends below the threaded cover and is fixedly connected to the top of the connecting plate.

[0016] In a possible design, the gas delivery component includes an exhaust pipe that passes through and is fixedly connected to the inner wall of the bottom of one side of the gas tank. The bottom end of the gas delivery pipe extends into the exhaust pipe and is fixedly connected to the inner wall of the top of the exhaust pipe. One end of the exhaust pipe is fixedly installed with a mounting cover. A first humidity sensor is fixedly installed on the inner wall of the top of the mounting cover. A flow-limiting component is connected to the inner wall of one side of the mounting cover. One side of the flow-limiting component passes through the inner wall of the other side of the mounting cover and extends to the outside of the mounting cover, and the flow-limiting component is connected to the inner wall of the other side of the mounting cover.

[0017] In a possible design, the flow-limiting component includes a support rod fixedly installed on the inner wall of one side of the mounting cover. A blocking pipe is fixedly installed through the inner wall of the other side of the mounting cover. One end of the support rod extends into the blocking pipe and is elastically connected to a blocking ball, and the blocking ball is in contact with the inner wall of the blocking pipe.

[0018] In a possible design, a connecting groove is formed on one side of the blocking ball. One end of the support rod extends into the connecting groove and is fixedly installed with a sliding plate. The sliding plate is slidably connected to the inner wall of the connecting groove. A second tension spring is fixedly installed on one side of the sliding plate, and one end of the second tension spring is fixedly connected to the inner wall of one side of the connecting groove.

[0019] In the present invention, first, a plurality of primary devices are assembled. When two adjacent primary devices are connected side by side, the snap ring can be docked with the corresponding closed cover. And when the two primary devices approach each other, the corresponding docking pipe can be used to push the closed cover to move, so that a plurality of flow holes on the closed cover can be kept in communication with the corresponding docking pipe. Therefore, dry air can flow through the closed cover to another docking pipe. After connecting a plurality of primary devices, a plurality of docking pipes can be kept in communication, so that it is convenient to supplement gas into a plurality of gas boxes at the same time. And when the closed cover moves, the first tension spring is in a tension stress state, so that the first tension spring can be used to elastically limit the closed cover. When the closed cover is not engaged with the snap ring, the first tension spring can move the closed cover to the original position, and the corresponding plurality of flow holes can be blocked by the closed ring. After assembling a plurality of primary devices, at this time, the docking pipe on one side can be connected to the conveying pipe for conveying dry air outside. Then, the valve stems are rotated respectively to drive the corresponding ball valves to rotate, so that the L-shaped holes can be rotated to be in communication with the connecting pipes. Therefore, after the dry air is conveyed into the docking pipe, the dry air can flow from the connecting pipes and the L-shaped holes into the support pipes, and then the support pipes can convey the dry air into the gas boxes to supplement dry air into the gas boxes. When gas is filled into the gas boxes, the air pressure in the gas boxes will increase at this time. The mounting cover is in communication with the gas boxes through the exhaust pipes. Therefore, after the air pressure in the gas boxes increases, the blocking ball can be pushed to move along the axis direction of the support rod. And when the blocking ball moves, the second tension spring is in a stressed and stretched state, so that the blocking pipe can be in a communicating state, so that the original gas in the gas boxes can be discharged, and the air pressure in the gas boxes can be kept balanced. And the first humidity sensor arranged in the mounting cover can detect the humidity of the gas flowing into the mounting cover. When the dry air filled into the gas boxes enters the mounting cover and the first humidity sensor can detect the dry gas, it indicates that the inflation of the gas boxes is completed. Therefore, when the gas supply to the gas boxes is stopped, the second tension spring in the stressed state can drive the blocking ball to move reversely to closely fit the inner wall of the blocking pipe, so as to prevent the gas in the gas boxes from leaking. During daily use, after the second humidity sensor detects that the humidity of the gas in the gas boxes increases, a working instruction can be sent to the suction pump at this time to make the suction pump start to work, so that the gas in the gas boxes can be sucked out through the gas transmission assembly, and then through the conveying of the gas pipes and the U-shaped pipes, the gas can be dispersedly conveyed into the two filter pipes. Therefore, when the gas flows upward, it can pass through the corresponding plurality of dehumidifying plates, so that the dehumidifying plates can be used to filter the air, so as to absorb the moisture in the air. The filtered air can pass through the hose, the cylindrical box and the output of the suction pump, and the filtered gas can be sent back into the gas boxes, so as to facilitate the cyclic dehumidification of the gas in the gas boxes and keep the gas boxes in a dry state.

[0020] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the present invention.

[0021] Beneficial effects: In the present invention, through the provided opening and closing assembly, when it is necessary to fill the air box with dry air, the valve rod can be rotated by turning the knob at this time, so that the L-shaped hole can be rotated to be in communication with the connecting pipe. Therefore, after the dry air is transported into the docking pipe, the dry air can flow from the connecting pipe and the L-shaped hole into the support pipe, and then the support pipe can transport the dry air into the air box, so as to be able to supplement dry air into the air box.

[0022] In the present invention, through the provided plugging assembly, when two adjacent primary devices are connected side by side, the snap ring can be docked with the closed cover at this time, and when the two primary devices approach each other, the corresponding docking pipe can be used to push the closed cover to move, so that the multiple flow holes on the closed cover can be in communication with the corresponding docking pipes. Therefore, the dry air can flow through the closed cover to another docking pipe. In this way, after multiple primary devices are connected, multiple docking pipes can be kept in communication, so that it is convenient to supplement gas into multiple air boxes at the same time.

[0023] In the present invention, through the provided filter element assembly, after the two dehumidification plates are respectively placed in the corresponding filter pipes, and then the cover plate is clamped with the corresponding filter pipe. After the second humidity sensor detects that the gas humidity in the air box increases, a working instruction can be sent to the suction pump at this time to make the suction pump start to work. In this way, the gas in the air box can be sucked out through the gas transmission assembly, and then through the transportation of the gas transmission pipe and the U-shaped pipe, the gas can be dispersed and transported into the two filter pipes. Therefore, when the gas flows upward, it can pass through the corresponding multiple dehumidification plates, and the dehumidification plates can be used to filter the air, so as to absorb the moisture in the air. The filtered air can pass through the hose, the cylindrical box and the output of the suction pump, and the filtered gas can be sent back into the air box, so as to facilitate the cyclic dehumidification of the gas in the air box and keep the air box in a dry state.

[0024] In the present invention, through the provided gas transmission assembly, when inflating the air box, the gas originally in the air box can be pushed into the exhaust pipe at this time, so that the air pressure in the installation cover increases. After the air pressure in the installation cover increases, it can drive the current-limiting member to move, so that the current-limiting member is in an open state, so that the gas originally contained in the air box can be discharged. And the first humidity sensor arranged in the installation cover can detect the gas humidity flowing into the installation cover. When the dry air filled into the air box enters the installation cover and the first humidity sensor can detect the dry gas, it means that the inflation of the air box is completed.

[0025] After connecting multiple primary devices, the present invention can keep the adjacent docking pipes and the closed covers in communication. At this time, after introducing dry air from one side of the docking pipe, it is possible to supply dry gas to multiple gas boxes simultaneously, and during daily use, it is possible to achieve gas circulation dehumidification in the gas boxes. Therefore, the secondary devices located in the gas boxes can operate stably. Description of the Drawings

[0026] Figure 1 It is a three-dimensional schematic diagram of the internal structure of a post-cable-outlet gas-filled ring main unit for a primary-secondary integrated ring main unit provided by an embodiment of the present invention;

[0027] Figure 2 It is a three-dimensional schematic diagram of the first perspective of the connection structure of multiple primary devices of a post-cable-outlet gas-filled ring main unit for a primary-secondary integrated ring main unit provided by an embodiment of the present invention;

[0028] Figure 3 It is a three-dimensional schematic diagram of the second perspective of the connection structure of multiple primary devices of a post-cable-outlet gas-filled ring main unit for a primary-secondary integrated ring main unit provided by an embodiment of the present invention;

[0029] Figure 4 It is a three-dimensional schematic diagram of the connection structure between the primary device and the gas box of a post-cable-outlet gas-filled ring main unit for a primary-secondary integrated ring main unit provided by an embodiment of the present invention;

[0030] Figure 5 It is a three-dimensional schematic diagram of the sectional structure of the installation cover of a post-cable-outlet gas-filled ring main unit for a primary-secondary integrated ring main unit provided by an embodiment of the present invention;

[0031] Figure 6 It is a three-dimensional schematic diagram of the sectional structure of the spherical shell of a post-cable-outlet gas-filled ring main unit for a primary-secondary integrated ring main unit provided by an embodiment of the present invention;

[0032] Figure 7 It is a three-dimensional schematic diagram of the sectional structure of the docking pipe of a post-cable-outlet gas-filled ring main unit for a primary-secondary integrated ring main unit provided by an embodiment of the present invention;

[0033] Figure 8 It is a three-dimensional schematic diagram of the connection structure between the closed cover and the closed ring of a post-cable-outlet gas-filled ring main unit for a primary-secondary integrated ring main unit provided by an embodiment of the present invention;

[0034] Figure 9 It is a three-dimensional schematic diagram of the internal structure of the gas box of a post-cable-outlet gas-filled ring main unit for a primary-secondary integrated ring main unit provided by an embodiment of the present invention;

[0035] Figure 10Schematic diagram of the connection structure between the filter pipe and multiple dehumidification plates of the post-cable outlet inflatable ring main unit for the primary-secondary integrated ring main unit provided by the embodiment of the present invention.

[0036] Reference numerals:

[0037] 1, Substation; 2, Dehumidification plate; 3, Primary equipment; 4, Gas tank; 5, Support pipe; 6, Spherical shell; 7, Ball valve; 8, Valve stem; 9, Knob; 10, L-shaped hole; 11, Connecting pipe; 12, Docking pipe; 121, Support ring; 13, Fixed rod; 14, Enclosure; 15, Flow hole; 16, Collar; 17, First tension spring; 18, Sealing ring; 19, Snap ring; 20, Exhaust pipe; 21, Mounting cover; 22, First humidity sensor; 23, Baffle pipe; 24, Support rod; 25, Plugging ball; 26, Connection groove; 27, Second tension spring; 28, Support plate; 29, Clamping cover; 30, U-shaped pipe; 31, Filter pipe; 32, Cover plate; 33, Connecting plate; 34, Threaded cover; 35, Support screw; 36, Air delivery pipe; 37, Hose; 38, Cylindrical box; 39, Suction pump; 40, Second humidity sensor; 41, Mounting rod. Detailed implementation manners

[0038] The embodiments of the present invention will be described below with reference to the accompanying drawings in the embodiments of the present invention.

[0039] In the description of the embodiments of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "connection" and "installation" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. In addition, "communication" can be a direct communication or an indirect communication through an intermediate medium. Among them, "fixing" means that they are connected to each other and the relative position relationship after connection remains unchanged. The orientation terms mentioned in the embodiments of the present invention, such as "inside", "outside", "top", "bottom", etc., are only references to the direction of the accompanying drawings. Therefore, the orientation terms used are for better and clearer description and understanding of the embodiments of the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the embodiments of the present invention.

[0040] In the embodiments of the present invention, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features.

[0041] In the embodiments of the present invention, "and / or" is merely a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, in this text, the character " / " generally indicates that the associated objects before and after are in an "or" relationship.

[0042] References to "one embodiment" or "some embodiments" etc. described in this specification mean that in one or more embodiments of the present invention, specific features, structures, or characteristics described in connection with that embodiment are included. Thus, statements such as "in one embodiment", "in some embodiments", "in other some embodiments", "in still other embodiments" etc. that appear in different places in this specification do not necessarily all refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in another way. The terms "comprise", "include", "have" and their variants all mean "including but not limited to", unless otherwise specifically emphasized in another way.

[0043] Embodiment 1: Refer to Figures 1 - 10 , a ring main unit box. The inflatable ring main unit box includes a substation 1. Two door panels are symmetrically hinged at the opening of the substation 1, which is convenient for opening and closing the substation 1. A plurality of primary equipment 3 are installed in parallel at equal intervals in the substation 1. An air box 4 is fixedly installed on each primary equipment 3, which is used to install secondary equipment and protect cable conductors.

[0044] As Figure 6 shown, the design of the air intake mechanism is to fill dry air into the air box 4. An air intake mechanism is connected to the top of each air box 4. The air intake mechanism includes a support pipe 5. The support pipe 5 penetrates through the inner wall of the top of the air box 4 and is fixedly connected to the air box 4. A spherical shell 6 is fixedly installed at the top end of the support pipe 5. A ball valve 7 is rotatably connected inside the spherical shell 6. An L-shaped hole 10 is opened on the ball valve 7, and this L-shaped hole 10 is always in communication with the support pipe 5. A valve rod 8 is fixedly installed at the top of the ball valve 7. The top end of the valve rod 8 penetrates through the inner wall of the top of the spherical shell 6 and extends above the spherical shell 6. A knob 9 is also fixedly installed at the top end of the valve rod 8. A connecting pipe 11 is fixedly installed on one inner wall of the spherical shell 6. One end of the connecting pipe 11 extends to the outside of the spherical shell 6 and is fixedly connected to a docking pipe 12. When it is necessary to fill dry air into the air box 4, an operator can rotate the knob 9. The knob 9 drives the valve rod 8 and the ball valve 7 to rotate, so that the L-shaped hole 10 is in communication with the connecting pipe 11. In this way, dry air can enter the support pipe 5 through the connecting pipe 11 and the L-shaped hole 10, and then be transported to the air box 4 by the support pipe 5.

[0045] As Figure 7As shown, the design of the docking pipe 12 is to achieve the connection between multiple gas boxes 4. A plugging component is installed in each docking pipe 12. The plugging component includes a sealing ring 18 fixedly installed in the docking pipe 12, and a sealing cover 14 is hermetically and slidably connected to the sealing ring 18. A plurality of flow holes 15 are equidistantly opened on the inner wall of the sealing cover 14, and these flow holes 15 are blocked by the sealing ring 18 under normal circumstances. One side of the sealing cover 14 extends to the outside of the docking pipe 12, and a clamping ring 19 is fixedly installed at one end of the docking pipe 12. When two adjacent primary devices 3 are connected side by side, the clamping ring 19 on one primary device 3 will be clamped with the sealing cover 14 on the other primary device 3. During the process of the two primary devices 3 approaching each other, the docking pipe 12 will push the sealing cover 14 to move, so that the flow holes 15 on the sealing cover 14 are in communication with the corresponding docking pipe 12. In this way, the dry air can flow through the sealing cover 14 to another docking pipe 12, achieving the connection between multiple gas boxes 4 and facilitating the simultaneous gas replenishment into multiple gas boxes 4.

[0046] As Figure 7 shown, in order to ensure the stable movement and reset of the sealing cover 14, a support ring 121 and a fixing rod 13 are also fixedly installed in the docking pipe 12. A collar 16 is fixedly installed on one side inner wall of the sealing cover 14, and one end of the fixing rod 13 passes through one side inner wall of the sealing cover 14 and the collar 16 and extends into the sealing cover 14. A first tension spring 17 is sleeved on the fixing rod 13, and both ends of the first tension spring 17 are fixedly connected to one side of the collar 16 and one end of the fixing rod 13 respectively. When the sealing cover 14 moves, the first tension spring 17 will be in a stressed and stretched state. When the two primary devices 3 are disassembled and separated, the first tension spring 17 in the stressed state can drive the sealing cover 14 to move reversely and reset, moving the flow holes 15 into the sealing ring 18 to achieve the plugging of the docking pipe 12.

[0047] As Figure 4 and Figure 10As shown in the figure, the design of the filtering mechanism is to filter and dehumidify the air entering the air box 4. A filter element assembly is installed on one side of each air box 4. The filter element assembly includes a support plate 28 fixedly installed on one side of the air box 4, and two clamping covers 29 are symmetrically and fixedly installed on the top of the support plate 28. A filter tube 31 is clamped in the clamping cover 29, and the top end of the filter tube 31 extends above the clamping cover 29. A plurality of dehumidifying plates 2 are arranged at equal intervals in the filter tube 31, and an installation rod 41 is connected through these dehumidifying plates 2, which is convenient for placing the dehumidifying plates 2 in the filter tube 31. The top end of the filter tube 31 is clamped with a cover plate 32, and a hose 37 is fixedly connected through the inner wall of the top of the cover plate 32. The top ends of the two hoses 37 both extend above the air box 4 and are fixedly communicated with a cylindrical box 38. An attracting end of an attracting pump 39 is fixedly installed in the cylindrical box 38, and the attracting pump 39 is used to extract the gas in the air box 4 and filter it through the filter tube 31. A second humidity sensor 40 is also fixedly installed on one inner wall of the air box 4, and the second humidity sensor 40 is electrically connected to the attracting pump 39. When the second humidity sensor 40 detects that the gas humidity in the air box 4 increases, it will send a working instruction to the attracting pump 39 to make the attracting pump 39 start working.

[0048] As Figure 4 shown, in order to facilitate the clamping and positioning of the two filter tubes 31, a connecting plate 33 is fixedly connected to the two cover plates 32. A threaded assembly is connected through the connecting plate 33, and the bottom of the threaded assembly is connected to the top of the support plate 28. The threaded assembly includes a threaded cover 34 that penetrates through the connecting plate 33 and is rotatably connected to the connecting plate 33, and a support screw 35 is threadedly connected in the threaded cover 34. The bottom end of the support screw 35 extends below the threaded cover 34 and is fixedly connected to the top of the connecting plate 33. By operating the threaded cover 34, the connecting plate 33 can be driven to move longitudinally, so as to drive the two cover plates 32 to move downward to clamp and position the two filter tubes 31.

[0049] The primary equipment 3 is a basic component of the ring main unit, mainly including high-voltage switchgear. These equipment are responsible for closing, carrying and breaking the current under normal circuit conditions in the power system, and can close, carry and break the current under abnormal circuit conditions, such as short-circuit current, within the specified time. Specifically, the components in the primary equipment mainly include:

[0050] Load switch: A switchgear used to switch the load current, close the short-circuit current and carry the short-circuit current for a specified time in the power system.

[0051] Circuit breaker: A switching device that can close, carry and break the current under normal circuit conditions, and can close, carry and break the current under abnormal circuit conditions (including short-circuit conditions) within the specified time.

[0052] Disconnector: A switch device mainly used for "isolating power sources, performing switching operations, and connecting and disconnecting small-current circuits" without arc extinguishing function.

[0053] Fuse: An electrical appliance that melts the fuse wire with the heat generated by itself to disconnect the circuit when the current exceeds the specified value.

[0054] Current transformer: An instrument that transforms large current into small current, usually transforming large current into standard 5 A or 1 A current.

[0055] Voltage transformer: An instrument that transforms high voltage into low voltage, usually transforming high voltage into standard 100 V or 100 / √3 V low voltage.

[0056] Secondary equipment components

[0057] Secondary equipment is responsible for monitoring, controlling, and protecting primary equipment, mainly composed of distribution automation terminals, integrated power supply systems, communication modules, etc. Specifically, the components in secondary equipment mainly include:

[0058] Distribution automation terminal (DTU): It can monitor the power grid status in real time, detect and handle abnormalities in a timely manner, and improve power supply reliability. It usually contains a high-performance DSP processor for data acquisition, processing, and transmission.

[0059] Integrated power supply system: Provides stable and reliable power support for the equipment in the ring main unit to ensure the normal operation of the equipment.

[0060] Communication module: Responsible for data interaction between the ring main unit and external systems to achieve remote monitoring and control. It supports multiple communication protocols and interfaces, such as Ethernet, RS-485, etc.

[0061] High-precision sensor: Used to collect parameters such as current and voltage of primary equipment and convert them into signals that secondary equipment can process.

[0062] Secondary aviation plug: Used to aggregate the power supply, current, remote signal, remote control and other circuits of primary equipment to the DTU unit aviation plug room to achieve signal transmission and connection.

[0063] This application can be used in the technical field of electrical equipment and also in other fields applicable to this application.

[0064] Example 2: Refer to Figure 6, improved on the basis of Embodiment 1: A post-cable outlet gas-filled ring main unit for a primary-secondary integrated ring main unit, which is applied to the technical field of electrical equipment. The design of the gas transmission component is to convey the filtered air back into the gas tank 4. The gas transmission component includes an exhaust pipe 20 that penetrates the inner wall of the bottom of one side of the gas tank 4 and is fixedly connected to the gas tank 4. One end of the exhaust pipe 20 is fixedly installed with a mounting cover 21, and a first humidity sensor 22 is fixedly installed on the inner wall of the top of the mounting cover 21 for detecting the humidity of the gas flowing into the mounting cover 21. A flow-limiting member is connected to the inner wall of one side of the mounting cover 21 for controlling the outflow of the gas. The flow-limiting member includes a support rod 24 fixedly installed on the inner wall of one side of the mounting cover 21 and a blocking pipe 23 that penetrates the inner wall of the other side of the mounting cover 21. One end of the support rod 24 extends into the blocking pipe 23 and is elastically connected with a blocking ball 25, and the blocking ball 25 fits against the inner wall of the blocking pipe 23. After the gas enters the mounting cover 21, the air pressure in the blocking pipe 23 will increase, pushing the blocking ball 25 to move horizontally along the support rod 24 and separate from the inner wall of the blocking pipe 23, thereby allowing the gas to flow out. When the gas supply to the gas tank 4 stops, the blocking ball 25 will move reversely under the action of the second tension spring 27 to fit tightly against the inner wall of the blocking pipe 23 to prevent gas leakage.

[0065] However, as is well known to those skilled in the art, the working principles and wiring methods of the first humidity sensor 22, the suction pump 29, and the second humidity sensor 40 are common knowledge, and they all belong to conventional means or well-known common sense, so they will not be elaborated here. Those skilled in the art can make arbitrary selections according to their needs or convenience.

[0066] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, and all should be covered by the protection scope of the present invention; without conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other. Therefore, the protection scope of the present invention should be subject to the protection scope of the claims.

Claims

1. A post-cable-outlet gas-filled ring main unit for a primary-secondary integrated ring main unit, comprising a substation (1), and a plurality of primary equipment (3) are installed in parallel at equal intervals in the substation (1). A gas box (4) is fixedly installed on the primary equipment (3). A cable conductor penetrates and is connected to the inner wall of the bottom of one side of the gas box (4). The secondary equipment is installed in the gas box (4), and it is characterized in that, The inflatable ring net cage further comprises: An air intake mechanism, which includes an opening and closing component. The opening and closing component penetrates through the inner wall of the top of the corresponding air box (4) and is connected to the inner wall of the top of the air box (4). One side of the opening and closing component is connected with a docking pipe (12). A plugging component is installed in the docking pipe (12). One end of the plugging component extends to the outside of the docking pipe (12) and is clamped with one end of another docking pipe (12). A filtering mechanism, which includes a filter element component installed on one side of the air box (4). The bottom of the filter element component is connected with an air conveying component. One side of the air conveying component extends into the air box (4). A suction pump (39) is fixedly installed on the inner wall of the top of the air box (4). The suction end of the suction pump (39) extends above the air box (4) and is respectively connected with two filter element components. The opening and closing component includes a support pipe (5) that penetrates through the inner wall of the top of the air box (4) and is fixedly connected to the inner wall of the top of the air box (4). A spherical shell (6) is fixedly installed at the top end of the support pipe (5). A ball valve (7) is rotatably connected inside the spherical shell (6). An L-shaped hole (10) is opened on the ball valve (7), and the L-shaped hole (10) is always connected to the support pipe (5). A valve rod (8) is fixedly installed at the top of the ball valve (7). The top end of the valve rod (8) penetrates through the inner wall of the top of the spherical shell (6) and extends above the spherical shell (6). A knob (9) is fixedly installed at the top end of the valve rod (8). A connecting pipe (11) is fixedly installed on one side inner wall of the spherical shell (6). One end of the connecting pipe (11) extends to the outside of the spherical shell (6) and is fixedly connected to the docking pipe (12).

2. The post-cable outlet gas-filled switchgear for the primary-secondary integrated ring main unit according to claim 1, characterized in that The plugging component includes a sealing ring (18) fixedly installed in the docking pipe (12). A sealing cover (14) is in sealing and sliding connection with the sealing ring (18). A plurality of flow holes (15) are equidistantly opened on the inner wall of the sealing cover (14). The sealing ring (18) is used to plug the plurality of flow holes (15). One side of the sealing cover (14) extends to the outside of the docking pipe (12). A snap ring (19) is fixedly installed at one end of the docking pipe (12). One side of the sealing cover (14) is snap-fitted with the snap ring (19) on another docking pipe (12).

3. The post-cable outlet gas-filled ring main unit for the primary-secondary integrated ring main unit according to claim 2, wherein A support ring (121) is fixedly installed in the docking pipe (12). A fixing rod (13) is fixedly installed on one side of the support ring (121). A collar (16) is fixedly installed on one side inner wall of the sealing cover (14). One end of the fixing rod (13) penetrates through one side inner wall of the sealing cover (14) and the collar (16) and extends into the sealing cover (14). The fixing rod (13) is in close sliding connection with the inner wall of the collar (16). A first tension spring (17) located inside the sealing cover (14) is sleeved on the fixing rod (13). Two ends of the first tension spring (17) are respectively fixedly connected with one side of the collar (16) and one end of the fixing rod (13).

4. The post-cable outlet gas-filled ring main unit for the primary-secondary integrated ring main unit according to claim 1, characterized in that, The filter element assembly includes a support plate (28) fixedly installed on one side of the air box (4). Two clamping covers (29) are symmetrically and fixedly installed at the top of the support plate (28). A filter pipe (31) is clamped in the clamping cover (29). The top end of the filter pipe (31) extends above the clamping cover (29). A plurality of dehumidification plates (2) are arranged at equal intervals in the filter pipe (31). The same installation rod (41) penetrates through the plurality of dehumidification plates (2). The top end of the filter pipe (31) is clamped with a cover plate (32). A hose (37) is fixedly connected through the top inner wall of the cover plate (32). The top ends of the two hoses (37) both extend above the air box (4) and are fixedly communicated with the same cylindrical box (38). The suction end of the suction pump (39) extends into the cylindrical box (38) and is fixedly connected to the bottom inner wall of the cylindrical box (38). A second humidity sensor (40) is fixedly installed on one inner wall of the air box (4). The second humidity sensor (40) is electrically connected to the suction pump (39). The same U-shaped pipe (30) is fixedly installed on the bottom inner walls of the two clamping covers (29). The bottom end of the U-shaped pipe (30) extends below the support plate (28). An air delivery pipe (36) is fixedly installed on the bottom inner wall of the U-shaped pipe (30). The bottom end of the air delivery pipe (36) is connected to the air delivery component.

5. The post-cable outlet gas-filled ring main unit for the primary and secondary integrated ring main unit according to claim 4, characterized in that, The same connecting plate (33) is fixedly connected to the two cover plates (32). A threaded component penetrates through the connecting plate (33). The bottom of the threaded component is connected to the top of the support plate (28).

6. The post-cable outlet gas-filled ring main unit for the primary and secondary integrated ring main unit according to claim 5, characterized in that, The threaded component includes a threaded cover (34) that penetrates through the connecting plate (33) and is rotatably connected to the connecting plate (33). A support screw rod (35) is threadedly connected in the threaded cover (34). The bottom end of the support screw rod (35) extends below the threaded cover (34) and is fixedly connected to the top of the connecting plate (33).

7. The post-cable outlet gas-filled switchgear for the primary and secondary integrated ring network cabinet according to claim 4, characterized in that, The air delivery component includes an exhaust pipe (20) that penetrates through and is fixedly connected to the bottom inner wall of one side of the air box (4). The bottom end of the air delivery pipe (36) extends into the exhaust pipe (20) and is fixedly connected to the top inner wall of the exhaust pipe (20). One end of the exhaust pipe (20) is fixedly installed with an installation cover (21). A first humidity sensor (22) is fixedly installed on the top inner wall of the installation cover (21). A flow limiting component is connected to one inner wall of the installation cover (21). One side of the flow limiting component penetrates through the other inner wall of the installation cover (21) and extends to the outside of the installation cover (21). The flow limiting component is connected to the other inner wall of the installation cover (21).

8. The post-cable outlet gas-filled ring main unit for the primary-secondary integrated ring main unit according to claim 7, characterized in that, The flow limiting component includes a support rod (24) fixedly installed on one inner wall of the installation cover (21). A blocking pipe (23) is fixedly installed through the other inner wall of the installation cover (21). One end of the support rod (24) extends into the blocking pipe (23) and is elastically connected with a blocking ball (25). The blocking ball (25) fits against the inner wall of the blocking pipe (23).

9. The post-cable outlet gas-filled ring main unit for the primary and secondary integrated ring main unit according to claim 8, characterized in that, One side of the plugging ball (25) is provided with a connecting groove (26). One end of the support rod (24) extends into the connecting groove (26) and is fixedly installed with a sliding plate. The sliding plate is slidably connected to the inner wall of the connecting groove (26). One side of the sliding plate is fixedly installed with a second tension spring (27). One end of the second tension spring (27) is fixedly connected to one side inner wall of the connecting groove (26).

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