SF6 ring net cabinet gas leakage marking device
Patent Information
- Application Number
- CN202521886705.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-09-02
- Publication Date
- 2026-09-29
- Estimated Expiration
- 2035-09-02
AI Technical Summary
这一现有专利技术虽然可根据环网柜气箱内部气体压力自动进行补气排气，但无法对泄漏点进行标记，不便于人员快速查找泄漏点并及时进行检修
[0013]本实用新型一种SF6环网柜漏气标记装置与现有技术相比，具有以下优点：SF6环网柜的气箱由顶板、底板、两个横向侧板和两个纵向侧板拼焊构成，本实用新型通过在横向侧板和纵向侧板的焊缝处分别设置标记机构，让标记机构设置采用透明材料制作的L型支架板，将L型支架板的横向板和纵向板分别通过垫块对应固定在气箱的横向侧板和纵向侧板上，在L型支架板的横向板内侧固定面向焊缝且采用透明材料制作的标记板，在标记板上设置刻度，在L型支架板的纵向板上固定上下间隔分布且处于焊缝和标记板之间的横杆，在横杆上设置固定套，使固定套的下侧连接薄膜片，并在薄膜片面向标记板的一侧涂覆固体颜料。由此就构成了一种结构简单、成本低廉、安全可靠、实用性强的SF6环网柜漏气标记装置，在实际应用中，当焊缝某处漏气时，漏气会吹动薄膜片使其下端飘向标记板，薄膜片与标记板接触时会将固体颜料涂在标记板上，检修人员通过标记板上的固体颜料即可确定漏气位置，从而实现漏气标记目的。本实用新型通过使标记机构设置透明的L型支架板和标记板，可使检修人员直观看到标记机构的内部状态，以便跟据标记板上的固体颜料涂准确判断漏气位置；通过设置垫块一方面增强了结构强度，另一方面使L型支架板与气箱侧板之间形成一定的距离，以方便安装标记板、横杆、固定套和薄膜片。
Smart Images
Figure CN224817663U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a ring main unit, specifically to a leakage marking device for SF6 ring main units. Background Technology
[0002] SF6 gas-insulated ring main units are medium-voltage electrical combination devices that can be freely combined into multiple circuits, providing switching, interconnection, and protection functions for power systems. Their main circuit core components consist of SF6 load switches, circuit breakers, and other auxiliary electrical appliances. The gas box (cabinet) of the SF6 ring main unit is a sealed cavity structure formed by welding plates, filled with pressurized SF6 insulating gas. With prolonged use or in high-altitude areas, gas leakage from the weld seams often occurs in the gas box of the SF6 ring main unit. In such cases, it is necessary to replenish the gas inside the ring main unit's gas box to ensure its insulation performance and safety reliability. For example, the utility model patent with announcement number CN216959097U, entitled "High-Voltage Intelligent SF6 Ring Main Unit," includes a cabinet containing a gas chamber, an operating chamber, a pressure relief chamber, and a cable chamber. The top of the gas chamber is connected to a first electromagnetic control valve via an input pipe. A first connecting pipe is located on one side of the first electromagnetic control valve. One side of the first connecting pipe is detachably connected to a second connecting pipe via a first connector and a second connector. A first boss is welded to one side of the first connector, and a second boss is welded to one side of the second connector. A limiting device matching the first and second bosses is provided at the connection point between the first and second connectors. A pressure sensor is installed on the inner wall of the gas chamber, and a pressure relief device is located at the bottom of the gas chamber. A controller is also installed inside the gas chamber. While this existing patent technology can automatically replenish and vent gas based on the internal gas pressure of the ring main unit's gas box, it cannot mark leak points, making it difficult for personnel to quickly locate leaks and perform timely repairs. Utility Model Content
[0003] The purpose of this utility model is to provide an SF6 ring main unit leakage marking device, which has the advantages of simple structure, low cost, safety and reliability, and strong practicality.
[0004] To address the aforementioned problems in the existing technology, this utility model provides an SF6 ring main unit leakage marking device. The air box of the SF6 ring main unit is constructed by welding together a top plate, a bottom plate, two transverse side plates, and two longitudinal side plates. Marking mechanisms are provided at the weld seams of the transverse and longitudinal side plates. The marking mechanism includes an L-shaped support plate made of transparent material. The transverse and longitudinal plates of the L-shaped support plate are respectively fixed to the transverse and longitudinal side plates of the air box by pads. A marking plate made of transparent material facing the weld seam is fixed on the inner side of the transverse plate of the L-shaped support plate. The marking plate has graduations. A horizontal bar is fixed on the longitudinal plate of the L-shaped support plate, spaced vertically between the weld seam and the marking plate. A fixing sleeve is provided on the horizontal bar. A thin film is connected to the lower side of the fixing sleeve. The side of the thin film facing the marking plate is coated with solid pigment.
[0005] Furthermore, this utility model discloses an SF6 ring main unit leakage marking device, wherein the transverse side plate is provided with a gas replenishment mechanism, the gas replenishment mechanism includes an SF6 storage tank, a solenoid valve and a gas replenishment pipe, the SF6 storage tank is fixed on the outside of the transverse side plate, the outlet of the SF6 storage tank is provided with a first pipe joint, the solenoid valve is sealed and fixed on the outside of the transverse side plate, the inlet of the solenoid valve is provided with a second pipe joint, the outlet of the solenoid valve is connected to the inner cavity of the gas box through a gas replenishment hole provided on the transverse side plate, and the two ends of the gas replenishment pipe are connected to the first pipe joint and the second pipe joint respectively.
[0006] Furthermore, this utility model provides an SF6 ring main unit leakage marking device, wherein the gas replenishment mechanism further includes a controller fixed to the outside of the transverse side plate, and a pressure sensor sealed and fixed to the transverse side plate and extending into the inner cavity of the gas box. The controller is connected to the solenoid valve and the pressure sensor respectively through a first wire and a second wire.
[0007] Furthermore, in this utility model, an SF6 ring main unit leakage marking device is provided, wherein a support plate is fixed to the outer side of the transverse side plate, a positioning cylinder is fixed to the support plate, the SF6 storage tank is clamped in the positioning cylinder, and the second pipe joint passes through the support plate.
[0008] Furthermore, in this utility model, an SF6 ring main unit leakage marking device is provided, wherein the controller is fixed on a support plate on one side of the positioning cylinder, and the support plate is provided with a wire hole at the position corresponding to the controller, through which the first wire and the second wire pass.
[0009] Furthermore, in this utility model, an SF6 ring main unit leakage marking device is provided, wherein the support plate is welded to the transverse side plate, and the positioning cylinder is welded to the support plate.
[0010] Furthermore, this utility model provides an SF6 ring main unit leakage marking device, wherein the pad is provided with spaced threaded holes, and the horizontal and vertical plates of the L-shaped bracket plate are provided with connection holes corresponding to the threaded holes. The horizontal and vertical plates are fixed to the corresponding pads by bolts installed in the connection holes and threaded holes.
[0011] Furthermore, in this utility model, an SF6 ring main unit leakage marking device is provided, wherein the two ends of the marking plate are respectively fixed to the horizontal plate of the L-shaped support plate by screws, one end of the crossbar is welded to the horizontal plate of the L-shaped support plate, and the other end of the crossbar is suspended in the air.
[0012] Furthermore, this utility model provides an SF6 ring main unit leakage marking device, wherein the pad is fixed to the gas box by welding.
[0013] Compared with the prior art, the SF6 ring main unit leakage marking device of this utility model has the following advantages: The air box of the SF6 ring main unit is composed of a top plate, a bottom plate, two transverse side plates and two longitudinal side plates welded together. This utility model sets marking mechanisms at the weld seams of the transverse and longitudinal side plates respectively. The marking mechanism is set with an L-shaped support plate made of transparent material. The transverse and longitudinal plates of the L-shaped support plate are fixed to the transverse and longitudinal side plates of the air box respectively by pads. A marking plate made of transparent material facing the weld seam is fixed on the inner side of the transverse plate of the L-shaped support plate. The marking plate is marked with scale. A horizontal bar is fixed on the longitudinal plate of the L-shaped support plate, which is spaced vertically between the weld seam and the marking plate. A fixing sleeve is set on the horizontal bar, and a thin film is connected to the lower side of the fixing sleeve. A solid pigment is coated on the side of the thin film facing the marking plate. This results in a simple, low-cost, safe, reliable, and highly practical SF6 ring main unit leak marking device. In practical applications, when a leak occurs at a weld, the leaking air blows a diaphragm sheet, causing its lower end to drift towards the marking plate. When the diaphragm sheet contacts the marking plate, it applies solid pigment to the plate. Maintenance personnel can then determine the leak location by observing the solid pigment on the marking plate, thus achieving the purpose of leak marking. This invention, by incorporating a transparent L-shaped support plate and marking plate into the marking mechanism, allows maintenance personnel to directly observe the internal state of the mechanism, enabling them to accurately determine the leak location based on the solid pigment on the marking plate. The inclusion of spacers enhances structural strength and creates a certain distance between the L-shaped support plate and the gas box side plate, facilitating the installation of the marking plate, crossbar, fixing sleeve, and diaphragm sheet.
[0014] The following detailed description of the SF6 ring main unit leakage marking device of this utility model, with reference to the specific embodiments shown in the accompanying drawings, will provide further details. Attached Figure Description
[0015] Figure 1This is a schematic diagram of the structure of an SF6 ring main unit leakage marking device according to the present invention; Figure 2 for Figure 1 A magnified view of a portion of position A in the middle; Figure 3 This is a schematic diagram of the internal structure of an SF6 ring main unit leakage marking device according to this utility model; Figure 4 This is a partial cross-sectional schematic diagram of an SF6 ring main unit leakage marking device according to the present invention; Figure 5 for Figure 4 A magnified view of a portion of position B in the middle; Figure 6 This is a schematic diagram of the structure of the pad block in this utility model; Figure 7 This is a schematic diagram of the marking mechanism in this utility model; Figure 8 for Figure 7 A magnified view of the area at position C. Detailed Implementation
[0016] First, it should be noted that the directional terms such as up, down, left, right, front, and back mentioned in this utility model are only descriptions based on the accompanying drawings for ease of understanding, and are not intended to limit the technical solution or the scope of protection claimed in this utility model.
[0017] like Figures 1 to 8 The present invention provides a specific embodiment of an SF6 ring main unit leakage marking device, wherein the air box 1 of the SF6 ring main unit is specifically constructed by welding together a top plate 11, a bottom plate 12, two transverse side plates 13 and two longitudinal side plates 14. Marking mechanisms 2 are respectively installed at the weld seams of the transverse side plate 13 and the longitudinal side plate 14. The marking mechanism 2 is equipped with an L-shaped support plate 21 made of transparent material. The transverse plate 211 and the longitudinal plate 212 of the L-shaped support plate 21 are respectively fixed to the transverse side plate 13 and the longitudinal side plate 14 of the air box 1 by pads 22. A marking plate 23 made of transparent material facing the weld seam is fixed inside the transverse plate 211 of the L-shaped support plate 21. The marking plate 23 is set with scale. A horizontal bar 24 with vertical spacing and located between the weld seam and the marking plate 23 is fixed on the longitudinal plate 212 of the L-shaped support plate 21. A fixing sleeve 25 is set on the horizontal bar 24. A thin film 26 is connected to the lower side of the fixing sleeve 25. A solid pigment is coated on the side of the thin film 26 facing the marking plate 23.
[0018] The above configuration constitutes a simple, low-cost, safe, reliable, and practical SF6 ring main unit leak marking device. In practical applications, when a leak occurs at a certain point in the weld, the leaking air will blow the diaphragm 26 so that its lower end floats towards the marking plate 23. When the diaphragm 26 comes into contact with the marking plate 23, it will coat the marking plate 23 with solid pigment. Maintenance personnel can then determine the location of the leak by observing the solid pigment on the marking plate 23, thus achieving the purpose of leak marking. This utility model, by setting a transparent L-shaped support plate 21 and marking plate 23 in the marking mechanism 2, allows maintenance personnel to directly see the internal state of the marking mechanism 2, so as to accurately determine the location of the leak based on the solid pigment coating on the marking plate 23. The addition of the pad 22 enhances the structural strength and creates a certain distance between the L-shaped support plate 21 and the side plate of the gas box 1, facilitating the installation of the marking plate 23, crossbar 24, fixing sleeve 25, and diaphragm 26. It should be noted that the SF6 ring main unit is an existing device in this field, and its structure and principle are well known to those skilled in the art; the transparent material can be made of various forms such as plexiglass, and the film can be made of various materials such as plastic and rubber. As long as it has sufficient flexibility and can sway with the wind, the technical purpose of this utility model can be achieved.
[0019] As an optimized solution, this specific embodiment features a gas replenishment mechanism 3 on the transverse side plate 13. This mechanism includes an SF6 storage tank 31, a solenoid valve 32, and a gas replenishment pipe 33. The SF6 storage tank 31 is fixed to the outside of the transverse side plate 13, and its outlet has a first pipe connector 311. The solenoid valve 32 is sealed and fixed to the outside of the transverse side plate 13, and its inlet has a second pipe connector 321. The outlet of the solenoid valve 32 communicates with the inner cavity of the gas box 1 through a gas replenishment hole 131 on the transverse side plate 13. The two ends of the gas replenishment pipe 33 are connected to the first pipe connector 311 and the second pipe connector 321 respectively. This configuration allows SF6 to be replenished into the gas box 1 through the gas replenishment mechanism 3 when the pressure drops due to leakage, maintaining the pressure within the gas box 1 within a safe range. This ensures the insulation effect and reliability of the SF6 ring main unit, and features a simple structure, low cost, and convenient control. Specifically, when the pressure in gas tank 1 falls below a first set value due to leakage, SF6 from SF6 storage tank 31 is introduced into gas tank 1 by opening solenoid valve 32. When the pressure in gas tank 1 rises to a second set value, SF6 introduction into gas tank 1 is stopped by closing solenoid valve 32. This maintains the pressure in gas tank 1 within a certain range, ensuring the insulation effect and safety reliability of the SF6 ring main unit. To achieve automatic gas replenishment in case of leakage, this specific embodiment includes a controller 34 fixed to the outside of the transverse side plate 13 and a pressure sensor 35 sealed and fixed to the transverse side plate 13 and extending into the inner cavity of gas tank 1. The controller 34 is connected to the solenoid valve 32 and the pressure sensor 35 via a first wire 36 and a second wire 37, respectively. This configuration allows the pressure sensor 35 to detect the pressure in gas tank 1 in real time and transmit the pressure detection parameters to the controller 34. The controller 34 then automatically controls the opening and closing of the solenoid valve 32 based on the pressure detection parameters, improving the timeliness and effectiveness of introducing SF6 into gas tank 1 in case of leakage and enhancing safety reliability.
[0020] In a specific embodiment, a support plate 132 is fixed to the outer side of the transverse side plate 13, and a positioning cylinder 133 is fixed on the support plate 132. The SF6 storage tank 31 is fitted into the positioning cylinder 133, and the second pipe connector 321 passes through the support plate 132. This arrangement improves the convenience of assembling and disassembling the SF6 storage tank 31, allowing for quick replacement when the SF6 in the SF6 storage tank 31 is depleted. Simultaneously, in this specific embodiment, the controller 34 is fixed to the support plate 132 on one side of the positioning cylinder 133, and a wire-passing hole is provided at the position corresponding to the controller 34 on the support plate 132 to facilitate the passage of the first wire 36 and the second wire 37 through the wire-passing hole. To simplify the structure and improve stability, the support plate 132 is typically welded to the transverse side plate 13, and the positioning cylinder 133 is welded to the support plate 132.
[0021] In a specific embodiment, to improve ease of assembly and disassembly, this invention provides spaced threaded holes 221 on the pad 22. Correspondingly, connecting holes 213 corresponding to the threaded holes 221 are provided on the transverse plate 211 and longitudinal plate 212 of the L-shaped support plate 21. The transverse plate 211 and longitudinal plate 212 are fixed to the corresponding pad 22 by bolts 27 installed in the connecting holes 213 and threaded holes 221. Similarly, in this embodiment, both ends of the marking plate 23 are fixed to the transverse plate 211 of the L-shaped support plate 21 by screws 28 to improve ease of assembly and disassembly; and one end of the crossbar 24 is welded to the transverse plate 211 of the L-shaped support plate 21 to improve stability, while the other end of the crossbar 24 is suspended to facilitate the installation of the fixing sleeve 25. In practical applications, this invention also fixes the pad 22 to the air box 1 by welding to improve stability.
[0022] Practical application has shown that the SF6 ring main unit leakage marking device provided by this utility model can produce the following beneficial effects: 1. By setting a diaphragm and a marking plate, when SF6 leakage occurs at the weld, the diaphragm will be blown from the leakage point, causing it to float outward around the fixed sleeve, thus marking the pigment on the diaphragm onto the marking plate, making it easier for personnel to locate the leakage point and carry out timely repairs. 2. By setting a pressure sensor, the SF6 pressure inside the SF6 ring main unit can be detected in real time. When leakage occurs in the ring main unit, the pressure sensor will transmit the pressure to the controller, which will open the solenoid valve, allowing the SF6 inside the SF6 tank to be replenished into the ring main unit through the gas supply pipe in a timely manner. This ensures that the SF6 in the ring main unit is maintained within a reliable pressure range, thus allowing the ring main unit to maintain its insulation effect by automatically replenishing SF6 after a leakage.
[0023] The above embodiments are merely descriptions of preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Any modifications made by those skilled in the art based on the technical solution of the present utility model without departing from the design concept of the present utility model shall fall within the scope of protection defined by the claims of the present utility model.
Claims
1. A leakage marking device for an SF6 ring main unit, wherein the air box (1) of the SF6 ring main unit is constructed by welding together a top plate (11), a bottom plate (12), two transverse side plates (13), and two longitudinal side plates (14), characterized in that, Marking mechanisms (2) are provided at the weld seams of the transverse side plate (13) and the longitudinal side plate (14). The marking mechanism (2) includes an L-shaped support plate (21) made of transparent material. The transverse plate (211) and the longitudinal plate (212) of the L-shaped support plate (21) are respectively fixed to the transverse side plate (13) and the longitudinal side plate (14) of the air box (1) by pads (22). A marking plate (23) made of transparent material facing the weld seam is fixed on the inner side of the transverse plate (211) of the L-shaped support plate (21). The marking plate (23) is provided with scale. A crossbar (24) is fixed on the longitudinal plate (212) of the L-shaped support plate (21) with vertical spacing and located between the weld seam and the marking plate (23). A fixing sleeve (25) is provided on the crossbar (24). A thin film (26) is connected to the lower side of the fixing sleeve (25). The side of the thin film (26) facing the marking plate (23) is coated with solid pigment.
2. The SF6 ring main unit leakage marking device according to claim 1, characterized in that, The transverse side plate (13) is provided with a gas replenishment mechanism (3). The gas replenishment mechanism (3) includes an SF6 storage tank (31), a solenoid valve (32) and a gas replenishment pipe (33). The SF6 storage tank (31) is fixed on the outside of the transverse side plate (13). The outlet of the SF6 storage tank (31) is provided with a first pipe joint (311). The solenoid valve (32) is sealed and fixed on the outside of the transverse side plate (13). The inlet of the solenoid valve (32) is provided with a second pipe joint (321). The outlet of the solenoid valve (32) is connected to the inner cavity of the gas box (1) through the gas replenishment hole (131) provided on the transverse side plate (13). The two ends of the gas replenishment pipe (33) are connected to the first pipe joint (311) and the second pipe joint (321) respectively.
3. The SF6 ring main unit leakage marking device according to claim 2, characterized in that, The air replenishment mechanism (3) also includes a controller (34) fixed on the outside of the transverse side plate (13) and a pressure sensor (35) sealed and fixed on the transverse side plate (13) and extending into the inner cavity of the air box (1). The controller (34) is connected to the solenoid valve (32) and the pressure sensor (35) respectively through the first wire (36) and the second wire (37).
4. The SF6 ring main unit leakage marking device according to claim 3, characterized in that, A support plate (132) is fixed to the outside of the transverse side plate (13), and a positioning cylinder (133) is fixed on the support plate (132). The SF6 storage tank (31) is fitted in the positioning cylinder (133), and the second pipe joint (321) passes through the support plate (132).
5. The SF6 ring main unit leakage marking device according to claim 4, characterized in that, The controller (34) is fixed on a support plate (132) on one side of the positioning cylinder (133). The support plate (132) is provided with a wire hole at the position corresponding to the controller (34). The first wire (36) and the second wire (37) pass through the wire hole.
6. The SF6 ring main unit leakage marking device according to claim 5, characterized in that, The support plate (132) is welded to the transverse side plate (13), and the positioning cylinder (133) is welded to the support plate (132).
7. The SF6 ring main unit leakage marking device according to claim 1, characterized in that, The pad (22) is provided with spaced threaded holes (221), and the horizontal plate (211) and vertical plate (212) of the L-shaped bracket plate (21) are provided with connecting holes (213) corresponding to the threaded holes (221). The horizontal plate (211) and vertical plate (212) are fixed to the corresponding pad (22) by bolts (27) installed in the connecting holes (213) and threaded holes (221).
8. The SF6 ring main unit leakage marking device according to claim 7, characterized in that, The two ends of the marking plate (23) are fixed to the horizontal plate (211) of the L-shaped bracket plate (21) by screws (28), and one end of the crossbar (24) is welded to the horizontal plate (211) of the L-shaped bracket plate (21), while the other end of the crossbar (24) is suspended.
9. The SF6 ring main unit leakage marking device according to claim 7, characterized in that, The pad (22) is fixed to the air box (1) by welding.