Ring main unit bus anti-loosening connecting device

Abstract

The application discloses a kind of ring main unit bus anti-loosening connecting device, it is related to ring main unit bus anti-loosening technical field, including ring main unit body, the bus body being set to the inside of ring main unit body and the cabinet door body being set to the outside of ring main unit body, further including the bus early warning mechanism being set to the one end of bus body, the connection trigger mechanism being set to the threaded connection of both ends of bus body, the double precision early warning of bus body thermal expansion anomaly and threaded connection loosening is realized by bus early warning mechanism and connection trigger mechanism, effectively solve the problem that ring main unit bus system has no special early warning mechanism, only can be found by disassembling and repairing hidden trouble, double early warning avoids the risk of fault expansion in advance while saving the cost of traditional manual disassembly and troubleshooting, greatly improve the reliability of power distribution network power supply, and the setting of No. 1 spring and No. 2 spring can realize automatic reset after early warning, guarantee mechanism long-term stable work.

Description

Technical Field

[0001] This invention relates to the technical field of anti-loosening devices for busbars in ring main units, specifically an anti-loosening connection device for busbars in ring main units. Background Technology

[0002] The anti-loosening connection device for ring main units (RNBs) is an auxiliary device for busbar connections in indoor / outdoor RNBs, gas-insulated RNBs, modular RNB boxes, and other power distribution equipment. Its core function is to effectively suppress the loosening of busbar connections through mechanical structure optimization and anti-loosening mechanism design, ensuring the electrical continuity and mechanical stability of busbar connections, thereby avoiding power supply faults caused by loose connections and providing a basic guarantee for the safe and reliable operation of the power distribution network.

[0003] In the installation and fixing of busbars in ring main units, threaded connections are mainly used at both ends of the busbar for fastening. This fixing method, due to its simple structure and convenient assembly / disassembly, has become a widely used process in the assembly of ring main unit busbar systems. However, during actual current flow operation, the busbar will experience temperature rise due to the Joule heating effect. Affected by the physical properties of metal thermal expansion and contraction, the busbar will undergo axial and radial deformation. Long-term temperature change cycles can easily lead to loosening or even misalignment between the busbar and the threaded connection. To address this loosening and misalignment problem, conventional mechanical auxiliary fixing structures are limited by the compact internal space of the ring main unit and the dynamic deformation of the busbar. Due to the inherent limitations of the ring main unit (RNB), it is difficult to form an effective and suitable fixed constraint on the busbar, and it is impossible to fundamentally improve the risk of busbar loosening and displacement. At the same time, in actual engineering applications, RNBs are mostly installed in parallel, and the busbars inside the cabinet are in a closed installation space. When maintenance personnel carry out maintenance work, they cannot directly confirm the actual connection status and deformation of the busbars inside the cabinet through external observation, external testing and other external means. They can only conduct internal inspections by disassembling the cabinet cover and the parallel connection structure, which greatly increases the number of procedures for maintenance work, causes a lot of waste of maintenance time, and significantly reduces the maintenance efficiency of the RNB busbar system.

[0004] To address the aforementioned issues, there is an urgent need for innovative designs based on the existing anti-loosening connection devices for ring main unit busbars. Summary of the Invention

[0005] The technical solution of this invention addresses the problem that existing technical solutions are too simplistic, and provides a solution that is significantly different from existing technologies. Specifically, the purpose of this invention is to provide a ring main unit busbar anti-loosening connection device to solve the problem mentioned in the background that the busbar is easily loosened and shifted due to thermal expansion and contraction when it is fixed by threads. In the scenario of ring main unit installation, maintenance personnel cannot confirm the internal busbar status through external factors, resulting in excessively long maintenance time.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a ring main unit busbar anti-loosening connection device, comprising a ring main unit body, a busbar body disposed inside the ring main unit body, and a cabinet door body disposed outside the ring main unit body, and further comprising: Busbar early warning mechanism installed at one end of the busbar body; All are connection triggering mechanisms located at the threaded connections at both ends of the busbar body; The busbar early warning mechanism includes a heat-sensing plate disposed at one end of the busbar body, a heat-conducting plate disposed at the top of the outer wall of the heat-sensing plate, a base plate disposed at the bottom of the outer wall of the heat-sensing plate, a connecting rod connected to the outer wall of the base plate, and a No. 1 spring disposed around one end of the connecting rod. The connection triggering mechanism includes a friction ring movably disposed at the threaded connection at both ends of the busbar body, a connecting block is provided on the outer wall of the friction ring, and a rotating rod is connected to the outer wall of the connecting block.

[0007] Preferably, a top block is provided at the other end of the connecting rod, and a mounting bracket is provided on the outer wall of the connecting rod; The bottom of the top block is movably provided with a bottom block, one end of which is connected to a first sliding rod. A second spring is arranged around the outer wall of one end of the first sliding rod, and a warning head is provided at one end of the first sliding rod.

[0008] Preferably, a rotating wheel is movably provided at one end of the rotating rod, a second sliding rod is movably installed on one side of the outer wall of the rotating wheel, and a stop bar is provided on the outer wall of the second sliding rod.

[0009] Preferably, the heat-conducting plate at the top of the outer wall of the heat-sensing plate is in contact with one end of the busbar body; The heat-conducting plate is made of a thermally conductive material; The thermal plate is made of aluminum-zinc alloy.

[0010] Preferably, one side of the outer wall of the top block is arc-shaped, and the shape of one end of the bottom block matches the shape of one side of the outer wall of the top block; There are two movable sliding rods, which are respectively located at both ends of the busbar body.

[0011] Preferably, one end of the first spring is connected to the outer wall of the mounting bracket, and the other end of the first spring is connected to the outer wall of the base plate.

[0012] Preferably, the outer wall of the cabinet door body is provided with holes; The diameter of the hole on the outer wall of the cabinet door is matched with the diameter of the warning head.

[0013] Preferably, the friction ring is made of rubber, and the friction ring is movably connected to a bolt used for fixed installation at one end of the busbar body.

[0014] Preferably, the material of the rotating wheel is rubber, and the material of one side of the outer wall of the second slide rod is rubber; The outer wall of the rotating wheel is in contact with the outer wall of the second sliding rod.

[0015] Preferably, the wheel at one end of the busbar body is in contact with the outer wall of the second slide rod; The rotating wheel at the other end of the busbar body is in contact with the outer wall of the first sliding rod.

[0016] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention provides precise dual early warnings for abnormal thermal expansion of the busbar body and loosening of threaded connections through a busbar early warning mechanism and a connection triggering mechanism. This effectively solves the problem of ring main unit busbar systems lacking a dedicated early warning mechanism, relying solely on disassembly for inspection to detect potential problems. In traditional ring main unit operation and maintenance, abnormal thermal expansion of the busbar body due to Joule heating and loosening of threaded connections at both ends caused by long-term temperature fluctuations cannot be detected in advance. These issues can only be addressed by disassembling the ring main unit's protective cover and parallel structure during power supply anomalies or scheduled maintenance. This not only easily leads to serious faults such as busbar joint burning and short circuits due to delayed handling of potential problems, but can also cause large-scale power outages. This invention, through a busbar early warning mechanism with a heat-conducting plate tightly attached to the busbar body, can quickly conduct abnormal heat from the busbar body to the aluminum-zinc alloy material. The heat-sensitive plate expands when heated, causing the base plate to shift. This displacement, via a connecting rod, drives the top block to press against the base block, causing the first sliding rod and warning head to extend from the opening in the cabinet door. The rubber friction ring connecting the trigger mechanism is in contact with the fixing bolts at both ends of the busbar. When the bolts loosen and reverse, the friction ring rotates synchronously, driving the rotating rod to rotate via the connecting block. The rotating rod drives the rotating wheel to rotate, using the friction between the rubbers to move the second sliding rod. This pushes the base block via the abutment rod, similarly triggering the extension of the first sliding rod and warning head. This dual warning system eliminates the cost of traditional manual disassembly and troubleshooting, proactively mitigating the risk of escalating faults and significantly improving the reliability of the power distribution network. Furthermore, the first and second springs allow for automatic reset after the warning, ensuring long-term stable operation of the mechanism.

[0017] 2. By using warning heads and openings on the outer wall of the cabinet door, potential hazards in the busbar body can be visualized externally, significantly reducing maintenance time and effectively solving the maintenance dilemma of difficulty in externally confirming the status of the busbars inside the cabinet in the scenario of ring main units installed in parallel. Since ring main units are mostly installed in parallel, the busbar body and all connecting parts are located in the enclosed space of the ring main unit. When maintenance personnel carry out maintenance, they need to first disassemble the cabinet door body, cabinet cover, and parallel connection parts of adjacent cabinets. The disassembly and assembly process alone consumes a lot of time. This invention opens on the outer wall of the cabinet door body to make the potential hazards visible externally. The diameter of the hole is precisely matched with the diameter of the warning head. When the busbar body experiences abnormal thermal expansion or loose threads, the warning head can extend directly from the hole. Workers do not need to disassemble any cabinet structure and can quickly determine the operating status of the busbar body inside the ring main unit by simply observing it from the outside. This directly eliminates the tedious disassembly, reassembly, and resetting procedures in traditional maintenance, significantly shortening maintenance time. At the same time, the external visual warning avoids damage to the internal components of the ring main unit caused by frequent disassembly, reduces the risk of secondary faults during maintenance, and improves the safety and efficiency of maintenance operations. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the external structure of the present invention.

[0020] Figure 3 This is a schematic diagram of the overall internal structure of the present invention.

[0021] Figure 4 This is a schematic diagram of the busbar early warning mechanism, the connection triggering mechanism, and the cabinet door body of the present invention.

[0022] Figure 5 This is a schematic diagram of the busbar early warning mechanism, the connection triggering mechanism, and the cabinet door body of the present invention; Figure 6 This is an enlarged schematic diagram of a portion of the structure of the triggering mechanism of the present invention; Figure 7 This is a schematic diagram of the connection structure between the busbar early warning mechanism and the connection triggering mechanism of the present invention; Figure 8 This is a schematic diagram of the busbar early warning mechanism and the connection triggering mechanism of the present invention; Figure 9 This is a schematic diagram of the structure of the thermal plate and the heat-conducting plate of the present invention; Figure 10 This is a schematic diagram of the structure of the thermal plate and the base plate of the present invention; Figure 11 This is a schematic diagram of the busbar early warning mechanism of the present invention; Figure 12This is a partial structural schematic diagram of the busbar early warning mechanism and the connection triggering mechanism of the present invention; Figure 13 This is a partial structural schematic diagram of the busbar early warning mechanism and the connection triggering mechanism of the present invention.

[0023] In the diagram: 1. Ring main unit body; 2. Busbar early warning mechanism; 201. Heat sensor plate; 202. Heat conduction plate; 203. Base plate; 204. Connecting rod; 205. Spring No. 1; 206. Top block; 207. Mounting bracket; 208. Base block; 209. Slide rod No. 1; 210. Spring No. 2; 211. Warning head; 3. Connection triggering mechanism; 301. Friction ring; 302. Connecting block; 303. Rotating rod; 304. Rotating wheel; 305. Slide rod No. 2; 306. Abutment rod; 4. Busbar body; 5. Cabinet door body. Detailed Implementation

[0024] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0025] Please see Figures 1 to 13 This invention provides a technical solution: a ring main unit busbar anti-loosening connection device, comprising a ring main unit body 1, a busbar body 4 disposed inside the ring main unit body 1, and a cabinet door body 5 disposed outside the ring main unit body 1, and further comprising: Bus warning mechanism 2 is installed at one end of bus body 4; All are equipped with connection triggering mechanisms 3 at the threaded connections at both ends of the busbar body 4; The busbar early warning mechanism 2 includes a heat-sensing plate 201 disposed at one end of the busbar body 4. A heat-conducting plate 202 is disposed at the top of the outer wall of the heat-sensing plate 201, and a base plate 203 is disposed at the bottom of the outer wall of the heat-sensing plate 201. A connecting rod 204 is connected to the outer wall of the base plate 203, and a No. 1 spring 205 is arranged around one end of the connecting rod 204. The connection triggering mechanism 3 includes a friction ring 301 movably disposed at the threaded connection at both ends of the busbar body 4. A connecting block 302 is provided on the outer wall of the friction ring 301, and a rotating rod 303 is connected to the outer wall of the connecting block 302.

[0026] In this embodiment, the busbar early warning mechanism 2 and the connection triggering mechanism 3 provide a dual and precise early warning of abnormal thermal expansion of the busbar body 4 and loosening of the threaded connections. This effectively solves the problem that the ring main unit busbar system lacks a dedicated early warning mechanism and can only detect hidden dangers through disassembly and maintenance. In traditional ring main unit operation and maintenance, abnormal thermal expansion of the busbar body 4 caused by Joule heating and loosening of the threaded connections at both ends due to long-term temperature change cycles cannot be detected in advance. It can only be checked by disassembling the protective cover and parallel structure of the ring main unit 1 during power supply anomalies or regular maintenance. This not only easily leads to serious faults such as busbar joint burning and short circuits due to delayed handling of hidden dangers, but also causes large-scale power outages. In this invention, the heat-conducting plate 202 of the busbar early warning mechanism 2 is closely attached to the busbar body 4, which can quickly conduct the abnormal heat of the busbar body 4 to the aluminum-zinc alloy heat-sensitive plate 201. After the heat-sensitive plate 201 expands due to heat, it drives the base plate 2 The displacement of the 03 leads to the top block 206 pressing the bottom block 208 via the connecting rod 204, causing the first slide rod 209 and the warning head 211 to extend out of the hole in the cabinet body 5. The rubber friction ring 301 of the trigger mechanism 3 is in contact with the fixing bolts at both ends of the busbar body 4. When the bolts loosen and reverse, the friction ring 301 rotates synchronously and drives the rotating rod 303 to rotate via the connecting block 302. The rotating rod 303 drives the rotating wheel 304 to rotate, and the friction between the rubbers drives the second slide rod 305 to move. The bottom block 208 is pushed by the abutment rod 306, which also realizes the extension warning of the first slide rod 209 and the warning head 211. The dual warning saves the cost of traditional manual disassembly and inspection, avoids the risk of the fault escalation in advance, and greatly improves the reliability of the power supply of the distribution network. In addition, the setting of the first spring 205 and the second spring 210 can realize automatic reset after the warning, ensuring the long-term stable operation of the mechanism.

[0027] A top block 206 is provided at the other end of the connecting rod 204, and a mounting bracket 207 is provided on the outer wall of the connecting rod 204; The bottom of the top block 206 is movably provided with a bottom block 208. One end of the bottom block 208 is connected to a first slide rod 209. A second spring 210 is arranged around the outer wall of one end of the first slide rod 209. A warning head 211 is provided at one end of the first slide rod 209.

[0028] In this embodiment, the external visualization of potential hazards in the busbar body 4 is achieved through the warning head 211 and the holes on the outer wall of the cabinet door body 5, significantly reducing the maintenance time for staff. This effectively solves the maintenance dilemma of difficulty in externally confirming the status of the busbar inside the cabinet in the scenario of ring main unit parallel installation. Since most ring main units are installed in parallel, the busbar body 4 and all connecting parts are located in the enclosed space of the ring main unit body 1. When maintenance personnel carry out maintenance, they need to first disassemble the cabinet door body 5, the cabinet cover, and the parallel connection parts of adjacent cabinets. The disassembly and assembly process alone takes up a lot of time. This invention allows for external visualization of potential hazards in the busbar body 4 through the holes on the outer wall of the cabinet door body 5. The diameter of the hole is precisely matched with the diameter of the warning head 211. When the busbar body 4 experiences abnormal thermal expansion or loose threads, the warning head 211 can extend directly from the hole. The staff can quickly determine the operating status of the busbar body 4 inside the ring main unit 1 by simply observing it from the outside without disassembling any cabinet structure. This directly eliminates the tedious disassembly, reassembly, and resetting procedures in traditional maintenance, significantly shortening maintenance time. At the same time, the external visual warning avoids damage to the internal components of the ring main unit 1 caused by frequent disassembly, reduces the risk of secondary faults during maintenance, and improves the safety and efficiency of maintenance operations.

[0029] A rotating wheel 304 is movably mounted at one end of the rotating rod 303. A second sliding rod 305 is movably mounted on one side of the outer wall of the rotating wheel 304. A stop rod 306 is provided on the outer wall of the second sliding rod 305.

[0030] In this embodiment, the busbar body 4 will generate heat normally during daily use. However, when the heat generated by the busbar body 4 is too large, the heat-conducting plate 202 will transfer the heat to the heat-sensing plate 201. The aluminum-zinc alloy material of the heat-sensing plate 201 will expand when exposed to heat. When the heat-sensing plate 201 expands, the bottom plate 203 at the bottom of the outer wall of the heat-sensing plate 201 will be displaced. Since the bottom plate 203 is connected to the connecting rod 204, and the outer wall of the connecting rod 204 is connected to the mounting bracket 207, the displacement of the bottom plate 203 will drive the connecting rod 204 to move. When the connecting rod 204 moves, the top block 206 at one end will push against one end of the bottom block 208, causing the bottom block 208 to move to one side. After the bottom block 208 is displaced, it will drive the first sliding rod 209 to move synchronously. At the same time, the first sliding rod 209 will drive the warning head 211 to move synchronously.

[0031] The heat-conducting plate 202 on the top of the outer wall of the heat-sensitive plate 201 is attached to one end of the busbar body 4; The heat-conducting plate 202 is made of a thermally conductive material; The material of the heat-sensitive plate 201 is aluminum-zinc alloy.

[0032] In this embodiment, since the base plate 203 is connected to the connecting rod 204, and the outer wall of the connecting rod 204 is connected to the mounting bracket 207, the base plate 203 will move when it moves, and the connecting rod 204 will move when it moves. When the connecting rod 204 moves, the top block 206 at one end will push against one end of the base block 208, causing the base block 208 to move to one side. After the base block 208 moves, it will drive the first sliding rod 209 to move synchronously. At the same time, the first sliding rod 209 will drive the warning head 211 to move synchronously, so that the warning head 211 will be pushed out from the hole opened in the outer wall of the cabinet door body 5. When the staff is performing maintenance, they can observe whether the warning head 211 is pushed out from the hole opened in the outer wall of the cabinet door body 5. If it is pushed out, it means that the bus body 4 has excessive heat in a short period of time, which may cause loosening and other risks.

[0033] One side of the outer wall of the top block 206 is arc-shaped, and the shape of one end of the bottom block 208 matches the shape of one side of the outer wall of the top block 206. There are two movable slide bars 209, which are respectively located at both ends of the busbar body 4.

[0034] In this embodiment, if the busbar body 4 does not generate excessive heat in a short period of time, but heats up steadily, thermal expansion and contraction will occur due to the accumulation of time, causing the busbar body 4 to move slightly. This will increase the force on the bolts connected at both ends of the busbar body 4. If the bolts become loose (reverse), the friction ring 301 will also rotate synchronously with the bolts. When the friction ring 301 rotates, it will drive the rotating rod 303 to rotate through the connecting block 302. When the rotating rod 303 rotates, it will drive the rotating wheel 304 to rotate. When the rotating wheel 304 rotates, it will drive the second sliding rod 305, which is attached to its outer wall, to slide to one side through the friction between the rubber.

[0035] One end of spring 205 is connected to the outer wall of mounting bracket 207, and the other end of spring 205 is connected to the outer wall of base plate 203.

[0036] In this embodiment, when the rotating rod 303 rotates, it drives the rotating wheel 304 to rotate. When the rotating wheel 304 rotates, it drives the second sliding rod 305, which is attached to its outer wall, to slide to one side through the friction between the rubbers. When the second sliding rod 305 moves, the abutment 306 set on its outer wall drives the bottom block 208 to slide to one side. When the bottom block 208 moves, it drives the first sliding rod 209 and the warning head 211 to move. At the same time, the warning head 211 extends out from the hole opened on the outer wall of the cabinet door body 5, so that the staff can observe from the outside.

[0037] Holes are provided on the outer wall of the cabinet door body 5; The diameter of the hole on the outer wall of the cabinet door body 5 is matched with the diameter of the warning head 211.

[0038] In this embodiment, both situations can be observed from the outside of the ring main unit 1. If the warning head 211 extends, it means that the bus body 4 is at risk of loosening or has already loosened. The staff can perform temporary maintenance by disconnecting the power, which can save a lot of disassembly and maintenance time. When the bolts at both ends of the bus body 4 are reset, the second spring 210 will drive the first slide rod 209 and the bottom block 208 to reset.

[0039] The friction ring 301 is made of rubber, and the friction ring 301 is movably connected to the bolt for fixed installation at one end of the busbar body 4.

[0040] In this embodiment, however, in another case, after the busbar body 4 cools down, the warning head 211 can drive the bottom block 208 and the first slide rod 209 to reset. Simultaneously, the first spring 205 will also drive the connecting rod 204 to reset.

[0041] The material of the rotating wheel 304 is rubber, and the material of one side of the outer wall of the second slide rod 305 is rubber; The outer wall of the rotating wheel 304 is in contact with the outer wall of the second slide bar 305.

[0042] In this embodiment, if the bolt becomes loose (reverses), the friction ring 301 will also rotate synchronously with the bolt. When the friction ring 301 rotates, it will drive the rotating rod 303 to rotate through the connecting block 302. When the rotating rod 303 rotates, it will drive the rotating wheel 304 to rotate. When the rotating wheel 304 rotates, it will drive the second sliding rod 305, which is in contact with its outer wall, to slide to one side through the friction between the rubbers. When the second sliding rod 305 moves, the abutment 306 on its outer wall will drive the bottom block 208 to slide to one side.

[0043] The outer wall of the rotating wheel 304 at one end of the busbar body 4 is in contact with the outer wall of the second slide bar 305; The rotating wheel 304 at the other end of the busbar body 4 is in contact with the outer wall of the first slide bar 209.

[0044] In this embodiment, when the base plate 203 is displaced, it will drive the connecting rod 204 to move. When the connecting rod 204 moves, the top block 206 at one end will push against one end of the base block 208, causing the base block 208 to move to one side. After the base block 208 moves, it will drive the first sliding rod 209 to move synchronously. At the same time, the first sliding rod 209 will drive the warning head 211 to move synchronously, so that the warning head 211 is pushed out from the hole opened on the outer wall of the cabinet door body 5.

[0045] Working principle: When using this type of anti-loosening connection device for the busbar of the ring main unit, the busbar body 4 inside the ring main unit 1 will generate a temperature rise due to Joule heating during daily use. The busbar body 4 will undergo thermal expansion and contraction after cooling down. Repeated temperature change cycles will cause slight displacement of the connection parts, which will damage the connection tightness, increase the contact resistance, and further aggravate local overheating, forming a vicious cycle of "temperature rise-loosening-heating". This will cause the threaded connection of the busbar body 4 to loosen due to its own slight deformation.

[0046] First, the busbar body 4 will generate heat normally during daily use. However, when the heat generated by the busbar body 4 is excessive, the heat-conducting plate 202 will transfer the heat to the heat-sensing plate 201. The aluminum-zinc alloy material of the heat-sensing plate 201 will expand when exposed to heat. When the heat-sensing plate 201 expands, the bottom plate 203 on the outer wall of the heat-sensing plate 201 will shift. Since the bottom plate 203 is connected to the connecting rod 204, and the outer wall of the connecting rod 204 is connected to the mounting bracket 207, the displacement of the bottom plate 203 will drive the connecting rod 204 to move. When the top block 206 at one end is in contact with the bottom block 208, it will push the bottom block 208 to one side, causing the bottom block 208 to move. After the bottom block 208 moves, it will drive the first sliding rod 209 to move synchronously. At the same time, the first sliding rod 209 will drive the warning head 211 to move synchronously, so that the warning head 211 will be pushed out from the hole opened on the outer wall of the cabinet door body 5. When the staff is carrying out maintenance, they can observe whether the warning head 211 is pushed out from the hole opened on the outer wall of the cabinet door body 5. If it is pushed out, it means that the bus body 4 has excessive heat in a short period of time, which may cause loosening and other risks.

[0047] Meanwhile, if the busbar body 4 does not generate excessive heat in a short period of time, but heats up steadily, thermal expansion and contraction will occur due to the accumulation of time, causing the busbar body 4 to move slightly. This will increase the force on the bolts connecting both ends of the busbar body 4. If the bolts loosen (reverse), the friction ring 301 will also rotate synchronously with the bolts. When the friction ring 301 rotates, it will drive the rotating rod 303 to rotate through the connecting block 302. When the rotating rod 303 rotates, it will drive the rotating wheel 304 to rotate. When the rotating wheel 304 rotates, it will drive the second sliding rod 305, which is attached to its outer wall, to slide to one side through the friction between the rubber. When the second sliding rod 305 moves, the abutment 306 set on its outer wall will drive the bottom block 208 to slide to one side. When the bottom block 208 moves, it will drive the first sliding rod 209 and the warning head 211 to move. At the same time, the warning head 211 will extend out from the hole opened on the outer wall of the cabinet door body 5, allowing the staff to observe from the outside.

[0048] Both situations can be observed from the outside of the ring main unit 1. If the warning head 211 extends, it means that the bus body 4 is at risk of loosening or has already loosened. The staff can then perform a temporary power outage for maintenance, which can save a lot of disassembly and maintenance time. When the bolts at both ends of the bus body 4 are reset, the second spring 210 will drive the first slide rod 209 and the bottom block 208 to reset. In the other case, after the bus body 4 cools down, the warning head 211 will drive the bottom block 208 and the first slide rod 209 to reset. At the same time, the first spring 205 will also drive the connecting rod 204 to reset.

[0049] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A ring main unit busbar anti-loosening connection device, comprising a ring main unit body (1), a busbar body (4) disposed inside the ring main unit body (1), and a cabinet door body (5) disposed outside the ring main unit body (1), characterized in that, Also includes: Bus warning mechanism (2) is installed at one end of the bus body (4); All are set at the threaded connection points at both ends of the busbar body (4) by connection triggering mechanisms (3); The busbar early warning mechanism (2) includes a heat-sensing plate (201) disposed at one end of the busbar body (4), a heat-conducting plate (202) disposed at the top of the outer wall of the heat-sensing plate (201), a base plate (203) disposed at the bottom of the outer wall of the heat-sensing plate (201), a connecting rod (204) connected to the outer wall of the base plate (203), and a No. 1 spring (205) disposed around one end of the connecting rod (204). The connection triggering mechanism (3) includes a friction ring (301) movably disposed at the threaded connection at both ends of the busbar body (4). A connecting block (302) is provided on the outer wall of the friction ring (301), and a rotating rod (303) is connected to the outer wall of the connecting block (302).

2. The anti-loosening connection device for ring main unit busbars according to claim 1, characterized in that: The other end of the connecting rod (204) is provided with a top block (206), and the outer wall of the connecting rod (204) is provided with a mounting bracket (207). The bottom of the top block (206) is movably provided with a bottom block (208), one end of the bottom block (208) is connected to a first slide rod (209), a second spring (210) is arranged around the outer wall of one end of the first slide rod (209), and a warning head (211) is provided at one end of the first slide rod (209).

3. The anti-loosening connection device for ring main unit busbars according to claim 1, characterized in that: A rotating wheel (304) is movably provided at one end of the rotating rod (303), and a second sliding rod (305) is movably installed on one side of the outer wall of the rotating wheel (304). A stop rod (306) is provided on the outer wall of the second sliding rod (305).

4. The anti-loosening connection device for ring main unit busbars according to claim 1, characterized in that: The heat-conducting plate (202) on the top of the outer wall of the heat-sensitive plate (201) is attached to one end of the busbar body (4); The heat-conducting plate (202) is made of a heat-conducting material; The material of the thermal plate (201) is aluminum-zinc alloy.

5. The anti-loosening connection device for ring main unit busbars according to claim 2, characterized in that: One side of the outer wall of the top block (206) is arc-shaped, and the shape of one end of the bottom block (208) is adapted to the shape of one side of the outer wall of the top block (206); There are two movable slide rods (209), which are respectively located at both ends of the busbar body (4).

6. The anti-loosening connection device for ring main unit busbars according to claim 2, characterized in that: One end of the first spring (205) is connected to the outer wall of the mounting bracket (207), and the other end of the first spring (205) is connected to the outer wall of the base plate (203).

7. The anti-loosening connection device for the busbar of a ring main unit according to claim 2, characterized in that: Holes are provided on the outer wall of the cabinet door body (5); The diameter of the hole on the outer wall of the cabinet door body (5) is matched with the diameter of the warning head (211).

8. The anti-loosening connection device for ring main unit busbars according to claim 1, characterized in that: The friction ring (301) is made of rubber, and the friction ring (301) is movably connected to the bolt for fixed installation at one end of the busbar body (4).

9. A ring main unit busbar anti-loosening connection device according to claim 3, characterized in that: The material of the rotating wheel (304) is rubber, and the material of one side of the outer wall of the second slide rod (305) is rubber; The outer wall of the rotating wheel (304) is in contact with the outer wall of the second slide rod (305).

10. A ring main unit busbar anti-loosening connection device according to claim 3, characterized in that: The rotating wheel (304) at one end of the busbar body (4) is in contact with the outer wall of the second slide rod (305); The wheel (304) at the other end of the busbar body (4) is in contact with the outer wall of the first slide rod (209).

Images