A circuit connecting device in a secondary control cabinet of a power distribution cabinet

Abstract

The application relates to the technical field of secondary control cabinets of power distribution cabinets, in particular to a circuit connecting device in a secondary control cabinet of a power distribution cabinet, mainly a control cabinet, wherein a drawer is arranged in the control cabinet through a slide rail structure, slide rail structures are arranged on the left side and the right side of the drawer, the drawer can be pulled out and can be turned downward, electric elements are arranged in the drawer, and a clamping mechanism is arranged in the slide rail structure; the drawer is arranged on the control cabinet through the slide rail structure, so that a maintenance worker can more conveniently open and close the drawer to maintain the electric elements in the drawer; through a contact structure, when the maintenance worker opens the drawer, the circuit can automatically realize first power supply disconnection and then ground disconnection, and when the drawer is closed, the circuit can automatically realize first ground connection and then power supply connection, so that the safety of maintenance work is ensured, meanwhile, the contact structure can realize stable and reliable electric connection, the conduction area is larger, and the resistance is smaller.

Description

Technical Field

[0001] This invention relates to the field of power distribution cabinet secondary control cabinet technology, specifically to a circuit connection device in a power distribution cabinet secondary control cabinet. Background Technology

[0002] With the development of the power industry, the requirements for the safe, stable, and economical operation of power systems are becoming increasingly stringent. As an important component of the power system, the rationality of the design of the secondary control cabinet directly affects the operating efficiency and reliability of the entire power system. Existing control cabinets are mainly divided into fixed control cabinets and drawer-type control cabinets according to their structural form. Drawer-type control cabinets can be further divided into single-layer control cabinets and multi-layer control cabinets according to the number of drawer layers. In particular, the drawer-type control cabinet connects the drawer to the cabinet body through slide rails. The drawer integrates secondary electrical components such as relays, contactors, and instruments. An electrical connection device is set between the drawer and the cabinet body. The electrical connection device achieves conduction with the circuit through a plug-in electrical connection structure. Operators can complete the inspection and replacement of electrical components by pulling out the drawer, which greatly improves maintenance efficiency.

[0003] However, the circuit connection devices in existing drawer-type control cabinets mostly use metal pins and sockets. After long-term use, the slide rails will wear down, causing the drawer to drop in height. This can lead to misalignment of the metal pins and sockets, resulting in circuit connection failure. Moreover, it lacks the safety logic of grounding before connecting to power and disconnecting power before grounding, which can easily cause electric shock risks. In addition, when the cabinet is high, the top drawer is difficult for maintenance personnel to see the electrical components inside due to its height, making maintenance inconvenient.

[0004] Therefore, we propose a circuit connection device for the secondary control cabinet of the power distribution cabinet. Summary of the Invention

[0005] The purpose of this invention is to provide a circuit connection device in the secondary control cabinet of a power distribution cabinet, so as to solve the problems mentioned in the background art regarding the lack of safety logic in the circuit connection device used in the existing drawer-type control cabinet, which is prone to electric shock risk, the wear of the slide rails over long-term use leading to a decrease in drawer height and thus circuit connection failure, and the inconvenience of maintenance when the cabinet is tall because the top drawer is too high after being pulled out.

[0006] To achieve the above objectives, the present invention provides the following technical solution: A circuit connection device in a secondary control cabinet of a power distribution cabinet includes: a control cabinet, wherein a drawer is installed inside the control cabinet via a slide rail structure, and slide rail structures are installed on both the left and right sides of the drawer. The drawer can be pulled out and flipped downwards. Electrical components are installed inside the drawer. A clamping mechanism is installed inside the slide rail structure to reduce wear on the slide rail structure. A power storage device is installed on the top surface of the clamping mechanism to adjust the position of the clamping mechanism inside the slide rail structure. An adaptation mechanism is provided inside the slide rail structure above the clamping mechanism to adjust the slide rail structure to maintain the position of the drawer. A contact structure is installed inside the control cabinet, with three contact structures corresponding to the drawer and these three contact structures arranged horizontally at equal distances. The middle contact structure is grounded through a wire, and the two contact structures on both sides are connected to the positive and negative terminals of the power supply through wires, respectively.

[0007] Preferably, the control cabinet includes a cabinet shell with open front and rear ends. A back plate is bolted to the back of the cabinet shell. A mounting plate located in front of the back plate is fixedly installed on the inner wall of the cabinet shell. A controller is installed on the rear side of the mounting plate. A drawer is located in front of the mounting plate and inserted into the interior of the cabinet shell. The drawer includes a panel and a receiving body. The panel is fixedly installed on a slide rail structure. The back of the panel abuts against the front of the cabinet shell. The left and right side walls of the cabinet shell are thickened. Two slide rail structures are symmetrically installed on the left and right side walls of the cabinet shell. The receiving body is fixedly installed on the back of the panel and inserted into the interior of the cabinet shell. Electrical components are installed on the bottom surface of the inner cavity of the receiving body. A contact structure is installed between the mounting plate and the receiving body and is electrically connected to the electrical components inside the receiving body.

[0008] Preferably, the contact structure includes a fixing hole, which is formed on the mounting plate. A horn tube is fixedly inserted into the fixing hole. The other end of the horn tube extends rearward perpendicularly to the surface of the mounting plate. The rear end of the horn tube is fixedly connected to a splicing inner tube. A splicing outer tube is threaded onto the outside of the splicing inner tube. An extension tube is fixedly connected to the rear end of the splicing outer tube. The rear end of the extension tube is sealed. A first connector is fixedly connected to the rear end face of the extension tube. The first connector is connected to a wire. A contact post is inserted into the extension tube. The contact post and the extension tube are conductively connected. The front end of the contact post passes through the splicing inner tube and the horn tube and is fixedly inserted into the rear side wall of the receiving body. The front end of the contact post extends into the interior of the receiving body and is fixedly connected to a second connector. The second connector is electrically connected to an electrical component.

[0009] Preferably, the horn tube on the contact structure connected to ground via a wire is made of a conductive material, and the horn tube on the contact structure connected to the power supply via a wire is made of an insulating material.

[0010] Preferably, the rear end of the contact post is connected to a truncated cone, the rear end of the truncated cone abuts against the rear side of the inner cavity of the extension tube, and six wing strips are fixedly connected to the surface of the truncated cone. The wing strips are evenly distributed along the circumferential direction on the surface of the truncated cone. The wing strips are elastically bent inside the extension tube, and the outer side of the end of the wing strip contacts the inner wall of the extension tube.

[0011] Preferably, after the wing strip moves out of the extension tube, it is in a taut state. When the wing strip is in a taut state, the straight-line distance from its free end to the axis of the truncated cone is greater than the diameter of the small opening of the horn tube and less than the diameter of the large opening of the horn tube.

[0012] Preferably, six elastic strips are fixedly connected at equal intervals along the circumferential direction between the front end face of the cone and the rear end face of the contact post, with the middle of the elastic strips protruding outward and contacting the inner wall of the extension tube.

[0013] Preferably, the elastic strip will elastically recover after moving out of the extension tube, and the bulge in the middle of the elastic strip will become smaller.

[0014] Preferably, the slide rail structure includes a track groove, which is formed on the front side of the cabinet shell. Two limiting strips are fixedly connected to the inner wall of the track groove away from the inner cavity of the cabinet shell. A sealing frame is bolted to the front side of the cabinet shell. The rear side of the panel abuts against the front side of the sealing frame. A rectangular hole communicating with the track groove is formed on the sealing frame. A first opening hole communicating with the track groove is formed on the inner wall of the cabinet shell. The front end of the first opening hole passes through the sealing frame and is open. A probe is fixedly embedded in the bottom surface of the inner cavity of the first opening hole. A track shell is inserted into the track groove. Two fixed sliding grooves are formed on both the left and right sides of the track shell. The limiting strips are inserted into the fixed sliding grooves on the side of the track shell away from the inner cavity of the cabinet shell. The sealing frame blocks the track shell in the track groove. The side of the track shell closest to the inner cavity of the cabinet shell... A second opening is provided, aligned with the first opening. The front end of the second opening passes through the sealing frame. A displacement slide rail is slidably inserted inside the track housing. A clamping mechanism is located on the upper side of the displacement slide rail. Multiple lower rollers are rotatably installed between the left and right sides of the inner cavity of the track housing. The multiple lower rollers are evenly distributed and roll on the bottom surface of the displacement slide rail. The front end of the displacement slide rail extends from the rectangular hole and is fixedly connected to the back of the panel. A linkage bar located in the middle is fixedly connected to the side of the displacement slide rail near the inner cavity of the cabinet housing. The vertical height of both the first and second openings is greater than the thickness of the linkage bar. The end of the linkage bar facing the inner cavity of the cabinet housing passes through the second and first openings and is fixedly connected to the side of the receiving body. A probe monitors the position and height of the linkage bar, and the probe is connected to the controller for signal transmission.

[0015] Preferably, two assembly plates are fixedly connected to the rear end face of the displacement slide rail. A flip arm is installed between the two assembly plates via a pivot shaft. An anti-detachment block is fixedly connected to the rear end of the flip arm. Anti-detachment protrusions are fixedly connected to both sides of the anti-detachment block. A limiting groove is opened in the inner wall of the track groove. The anti-detachment protrusion is slidably inserted into the limiting groove. The vertical height of the limiting groove is greater than the thickness of the anti-detachment protrusion. A threaded channel is opened inside the displacement slide rail along the axial direction. An adjusting screw is installed inside the threaded channel with thread engagement. The front end face of the flip arm is an arc surface. An insertion groove is opened in the middle of the arc surface. The rear end of the adjusting screw is movably inserted into the insertion groove. The front end of the adjusting screw passes through the panel and is fixedly connected to a rotating disk.

[0016] Preferably, the clamping mechanism includes two telescopic rods, both of which are fixedly connected to the top surface of the inner cavity of the track housing and located at both ends of the track housing. The bottom ends of the two telescopic rods are fixedly connected to the same U-shaped clamp. Multiple upper rollers are rotatably installed on the inner wall of the U-shaped clamp. The upper rollers press against the top surface of the displacement slide rail, the flipping arm, and the anti-detachment block. An installation hole is opened in the middle of the top surface of the U-shaped clamp. Only a rotating screw is rotatably installed inside the installation hole. An internal thread sleeve is sleeved on the external thread of the rotating screw. The top end of the internal thread sleeve is fixedly installed on the top surface of the inner cavity of the track housing. A power storage device is installed between the rotating screw and the U-shaped clamp.

[0017] Preferably, the power storage device includes a power storage plate, which is fixedly sleeved on the outside of the rotating screw. A power storage upper hole is provided at the edge of the top surface of the power storage plate. A first short post is rotatably inserted into the power storage upper hole. A spring is fixedly connected to the bottom end of the first short post. The spring is sleeved on the outside of the rotating screw. A second short post is fixedly connected to the other end of the spring. A power storage lower hole is provided on the U-shaped clamp. The bottom end of the second short post is rotatably inserted into the power storage lower hole.

[0018] Preferably, the adaptation mechanism includes a fixed guide rail, which is fixedly connected to the top surface of the inner cavity of the track groove and located in the middle position. An I-beam slide rail is slidably inserted inside the fixed guide rail. An upper inclined arm is installed at both ends of the bottom surface of the I-beam slide rail, which can be flipped up and down. An adaptation block is installed at the other end of the upper inclined arm, which is inclined towards the middle of the fixed guide rail and can be flipped. A lower inclined arm is installed on the bottom surface of the adaptation block, which can be flipped. The bottom end of the lower inclined arm is installed on the top surface of the track shell. A first screw is installed in the adaptation block at the front end of the I-beam slide rail with a threaded engagement. A second screw is installed in the other adaptation block with a threaded engagement. The two ends of the first screw and the second screw are coaxially fixed together. A drive motor is fixedly connected to the rear end of the second screw. The drive motor is electrically connected to the controller. A positioning slide groove is opened on the rear side of the inner cavity of the track groove. The rear end of the drive motor is rectangular and is slidably inserted into the positioning slide groove and can slide up and down.

[0019] Compared with the prior art, the beneficial effects of the present invention are: This invention uses a slide rail structure to mount the drawer on the control cabinet, making it easier for maintenance workers to open and close the drawer to maintain the internal electrical components. Through the contact structure, when the maintenance worker opens the drawer, the circuit can automatically disconnect the power connection first and then disconnect the ground connection. When the drawer is closed, the circuit can automatically connect the ground connection first and then connect the power supply, ensuring the safety of maintenance work. At the same time, the contact structure can achieve stable and reliable electrical connection, with a larger conduction area and lower resistance.

[0020] This invention uses a sliding rail structure to allow people to pull out the drawer and then flip it down when it is in a high position, lowering the drawer's height and exposing the electrical components to the maintenance worker. This makes it easier for the maintenance worker to repair and maintain the electrical components, making the maintenance work simpler, more convenient, and easier to operate.

[0021] This invention applies pressure to the clamping mechanism through a power storage device, causing the clamping mechanism to press against the top surface of the displacement slide rail, the flip arm, and the anti-detachment block, thus holding the displacement slide rail, the flip arm, and the anti-detachment block in place. This reduces the gap that the displacement slide rail, the flip arm, and the anti-detachment block can move up and down, compensating for the increased gap caused by wear of the displacement slide rail, the flip arm, the anti-detachment block, and the lower roller. This ensures that the displacement slide rail, the flip arm, and the anti-detachment block move horizontally, thereby ensuring that the drawer is level and preventing the drawer from tilting due to increased gap. A probe can monitor the distance that the displacement slide rail, the flip arm, and the anti-detachment block descend due to wear, providing data support for wear compensation. The controller controls the operation of the adaptation mechanism based on the data. The operating adaptation mechanism drives the track housing and its internal components to move upward as a whole, thereby moving the drawer upward, compensating for the distance the drawer descends due to wear of the displacement slide rail, the flip arm, the anti-detachment block, and the lower roller, and ensuring that the contact structure can accurately align. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention when it has five drawers; Figure 2 For the present invention Figure 1 A schematic diagram of the 3D structure after the back panel is opened; Figure 3 For the present invention Figure 1 A three-dimensional structural diagram of the outer shell of the middle cabinet; Figure 4 For the present invention Figure 1 A three-dimensional structural diagram showing the exposed slide rail structure after a partial cut-open section of the left side of the cabinet's outer shell. Figure 5 For the present invention Figure 4 A three-dimensional structural diagram of the central track groove; Figure 6 For the present invention Figure 4 A schematic diagram of the three-dimensional structure in which the middle sliding rail structure and the panel form an integral whole; Figure 7 For the present invention Figure 6 A three-dimensional structural diagram of the left side of the track shell after it has been cut open. Figure 8 For the present invention Figure 7 A three-dimensional structural diagram of the clamping mechanism and the adapting mechanism; Figure 9 For the present invention Figure 8 A three-dimensional structural diagram of the clamping mechanism; Figure 10 For the present invention Figure 9 A schematic diagram of the disassembled structure of the energy storage device; Figure 11 For the present invention Figure 9 A schematic diagram of the disassembled structure of the mid-displacement slide rail; Figure 12 For the present invention Figure 2 A partial 3D structural diagram of the top of the mounting plate; Figure 13 For the present invention Figure 12 A schematic diagram of the disassembled structure of the middle contact structure; Figure 14 For the present invention Figure 11 A three-dimensional structural diagram of the tilting arm; Figure 15 This is a three-dimensional structural diagram of the present invention when it is a single-layer drawer.

[0023] In the picture: 1. Control cabinet; 101. Cabinet shell; 102. Back panel; 103. Mounting plate; 104. Front panel; 105. Main body; 2. Contact structure; 201. Fixing hole; 202. Horn tube; 203. Splicing inner tube; 204. Splicing outer tube; 205. Extension tube; 206. First joint; 207. Contact post; 208. Second joint; 209. Frustum; 210. Wing strip; 211. Elastic strip; 3. Slide rail structure; 301. Track groove; 302. Limiting strip; 303. Sealing frame; 304. Rectangular hole; 305. First opening hole; 306. Track housing; 307. Fixed slide groove; 308. Second opening hole; 309. Displacement slide rail; 310. Lower roller; 311. Linkage strip; 312. Assembly plate; 313. Tilting arm; 314. Anti-detachment block; 315. Anti-detachment protrusion; 316. Adjusting screw; 317. Insertion groove; 318. Rotary disk; 4. Clamping mechanism; 401. Telescopic rod; 402. U-shaped clamp; 403. Upper roller; 404. Mounting hole; 405. Rotating screw; 406. Internal threaded sleeve; 5. Power storage device; 501. Power storage plate; 502. Upper power storage hole; 503. First short column; 504. Spring; 505. Second short column; 506. Lower power storage hole; 6. Adaptive mechanism; 601. Fixed guide rail; 602. I-beam slide rail; 603. Upper inclined arm; 604. Adaptive block; 605. Lower inclined arm; 606. First screw; 607. Second screw; 608. Drive motor; 609. Positioning groove. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort should fall within the scope of protection of the present application.

[0026] like Figures 1-15 As shown, this application provides a circuit connection device in a secondary control cabinet of a power distribution cabinet, including: a control cabinet 1, a drawer installed inside the control cabinet 1 via a slide rail structure 3, the drawer can be one or more, the multiple drawers are arranged from top to bottom, slide rail structures (3) are installed on both the left and right sides of the drawer, the drawer can be pulled out and can be flipped down, electrical components are installed inside the drawer, a clamping mechanism 4 is installed inside the slide rail structure 3, the clamping mechanism 4 reduces the wear of the slide rail structure 3, a power storage device 5 is installed on the top surface of the clamping mechanism 4, the power storage device 5 adjusts the position of the clamping mechanism 4 inside the slide rail structure 3, an adaptation mechanism 6 is provided inside the slide rail structure 3 above the clamping mechanism 4, the adaptation mechanism 6 adjusts the slide rail structure 3 to maintain the position of the drawer, a contact structure 2 is installed inside the control cabinet 1, one drawer corresponds to three contact structures 2 and these three contact structures 2 are arranged horizontally at equal distances, the contact structure 2 in the middle is grounded through a wire, and the two contact structures 2 on both sides are respectively connected to the positive and negative poles of the power supply through wires.

[0027] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 6The control cabinet 1 includes a cabinet shell 101, which is open at both the front and rear ends. A back plate 102 is bolted to the back of the cabinet shell 101. A mounting plate 103 located in front of the back plate 102 is fixedly installed on the inner wall of the cabinet shell 101. A controller is installed on the rear side of the mounting plate 103. A drawer is located in front of the mounting plate 103 and inserted into the interior of the cabinet shell 101. The drawer includes a panel 104 and a receiving body 105. The panel 104 is fixedly installed on the slide rail structure 3. The panel 104 is equipped with an instrument and a lock body. The back of the panel 104 abuts against the front of the cabinet shell 101. The left and right side walls of the cabinet shell 101 are thickened. Two slide rail structures 3 corresponding to the same drawer are symmetrically installed on the left and right side walls of the cabinet shell 101. The receiving body 105 is fixedly installed on the back of the panel 104 and inserted into the inside of the cabinet shell 101. Electrical components are installed on the bottom surface of the inner cavity of the receiving body 105. The contact structure 2 is installed between the mounting plate 103 and the receiving body 105.

[0028] Please see Figure 6 , Figure 12 and Figure 13 The contact structure 2 includes a fixing hole 201, which is formed on the mounting plate 103. A horn tube 202 is fixedly inserted into the fixing hole 201. The other end of the horn tube 202 extends rearward perpendicularly to the surface of the mounting plate 103. The rear end of the horn tube 202 is fixedly connected to a splicing inner tube 203. A splicing outer tube 204 is threaded onto the outside of the splicing inner tube 203. The rear end of the splicing outer tube 204 is fixedly connected to an extension tube 205. The rear end of the extension tube 205 is sealed. A first connector 206 is fixedly connected to the rear end face. The first connector 206 is connected to the wire. A contact post 207 is inserted inside the extension tube 205. The contact post 207 is conductively connected to the extension tube 205. The front end of the contact post 207 passes through the splicing inner tube 203 and the horn tube 202 and is fixedly inserted into the rear side wall of the receiving body 105. The front end of the contact post 207 extends into the interior of the receiving body 105 and is fixedly connected to a second connector 208. The second connector 208 is electrically connected to the electrical components.

[0029] The mechanical guiding effect of the horn tube 202 on the contact post 207 can compensate for minor deviations.

[0030] The horn tube 202 on the contact structure 2, which is connected to ground by a wire, is made of conductive material. The horn tube 202 on the contact structure 2, which is connected to the power supply by a wire, is made of insulating material. All other components on the contact structure 2 are made of conductive material.

[0031] The rear end of the contact post 207 is connected to a truncated cone 209. The rear end of the truncated cone 209 abuts against the rear side of the inner cavity of the extension tube 205. Six wing strips 210 are fixedly connected to the surface of the truncated cone 209. The wing strips 210 are evenly distributed along the circumferential direction on the surface of the truncated cone 209. The wing strips 210 are elastically bent inside the extension tube 205. The outer side of the end of the wing strip 210 contacts the inner wall of the extension tube 205.

[0032] After the wing 210 moves out of the extension tube 205, it is in a taut state. When the wing 210 is in a taut state, the straight distance from its free end to the axis of the cone 209 is greater than the diameter of the small opening of the horn tube 202 and less than the diameter of the large opening of the horn tube 202.

[0033] The larger opening of the horn tube 202 faces the drawer side, and the smaller opening faces the mounting plate 103 side.

[0034] During the insertion of the contact post 207 into the extension tube 205, the end of the wing 210 first contacts the inner wall of the horn tube 202. The inner wall of the horn tube 202 applies a thrust, causing the wing 210 to gradually bend towards the axis of the frustum 209. Since the horn tube 202 on the contact structure 2 connected to the ground via a wire is made of conductive material, and the horn tube 202 on the contact structure 2 connected to the power supply via a wire is made of insulating material, the electrical components are grounded preferentially through the middle contact structure 2. After the wing 210 enters the extension tube 205, the wing 210 makes close contact with the inner wall of the extension tube 205 under the action of elasticity, resulting in better conductivity and lower contact resistance. Only then will the electrical components be connected to the power.

[0035] When the contact post 207 is pulled outward, the wing 210 will preferentially enter the horn tube 202. Since the horn tube 202 on the contact structure 2 connected to the ground by the wire is made of conductive material, and the horn tube 202 on the contact structure 2 connected to the power supply by the wire is made of insulating material, the electrical components will preferentially be de-energized after the wing 210 enters the horn tube 202. At the same time, the electrical components are still grounded. The electrical components will stop grounding only after the end of the wing 210 separates from the inner wall of the horn tube 202.

[0036] Six elastic strips 211 are fixedly connected at equal intervals along the circumference between the front end face of the cone 209 and the rear end face of the contact post 207. The middle part of the elastic strips 211 protrudes outward and contacts the inner wall of the extension tube 205.

[0037] After the elastic strip 211 moves out of the extension tube 205, it will elastically recover, and the bulge in the middle of the elastic strip 211 will become smaller after recovery.

[0038] After the cone 209 enters the extension tube 205, the rear end of the cone 209 abuts against the rear side of the inner cavity of the extension tube 205, further reducing the contact resistance and enhancing the conductivity. Then, the action of closing the drawer will move the contact post 207 further into the extension tube 205. Next, the contact post 207 squeezes the elastic strip 211. Since the middle of the elastic strip 211 protrudes outward, when the elastic strip 211 is squeezed, the middle of the elastic strip 211 will protrude outward further. Then, the outer side of the elastic strip 211 contacts the inner wall of the extension tube 205, reducing the contact resistance again and enhancing the conductivity once more. At the same time, the elastic strip 211 applies pressure to the cone 209, pressing the cone 209 against the rear side of the inner cavity of the extension tube 205, reducing the contact resistance once more and enhancing the conductivity once more. Finally, the drawer is locked, at which point the receiving body 105 contacts the mounting plate 103.

[0039] Please see Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 and Figure 11The slide rail structure 3 includes a track groove 301, which is formed on the front side of the cabinet shell 101. Two limiting strips 302 are fixedly connected to the inner wall of the track groove 301 away from the inner cavity of the cabinet shell 101. A sealing frame 303 is bolted to the front side of the cabinet shell 101. The rear side of the panel 104 abuts against the front side of the sealing frame 303. A rectangular hole 304 communicating with the track groove 301 is formed on the sealing frame 303. A first opening hole 305 communicating with the track groove 301 is formed on the inner wall of the cabinet shell 101. The front end of the first opening hole 305 penetrates the sealing frame. 303 is open, and a probe is fixedly embedded in the bottom surface of the inner cavity of the first opening 305. The track housing 306 is inserted into the inside of the track groove 301. The top wall of the track housing 306 is detachable. Two fixed sliding grooves 307 are opened on both the left and right sides of the track housing 306. The limiting strip 302 is inserted into the fixed sliding groove 307 on the side of the track housing 306 away from the inner cavity of the cabinet housing 101. The sealing frame 303 blocks the track housing 306 in the track groove 301. A second opening 308 is opened on the side of the track housing 306 closest to the inner cavity of the cabinet housing 101. 308 is aligned with the first opening 305. The front end of the second opening 308 passes through the sealing frame 303. A displacement slide rail 309 is slidably inserted into the interior of the track housing 306. The clamping mechanism 4 is located on the upper side of the displacement slide rail 309. Multiple lower rollers 310 are rotatably installed between the left and right sides of the inner cavity of the track housing 306. The multiple lower rollers 310 are evenly distributed and roll on the bottom surface of the displacement slide rail 309. The front end of the displacement slide rail 309 extends from the rectangular hole 304 and is fixedly connected to the back of the panel 104. The displacement slide rail 309 is close to the inner cavity of the cabinet housing 101. A linkage bar 311 located in the middle is fixedly connected to the side. The vertical height of the first opening hole 305 and the second opening hole 308 is greater than the thickness of the linkage bar 311. The end of the linkage bar 311 facing the inner cavity of the cabinet shell 101 passes through the second opening hole 308 and the first opening hole 305 and is fixedly connected to the side of the receiving body 105. The linkage bar 311 can be pulled out with the receiving body 105 through the openings of the second opening hole 308 and the first opening hole 305. From the probe toward the bottom surface of the linkage bar 311, the probe monitors the position and height of the linkage bar 311. The probe is connected to the controller for signal transmission.

[0040] The controller has preset position information of the linkage bar 311. The controller monitors the position of the linkage bar 311 through the probe. When the lower roller 310 and the displacement slide rail 309 wear out after long-term use, the displacement slide rail 309 will drop in position due to wear. The displacement slide rail 309 will then bring the linkage bar 311 down. The distance monitored by the controller through the probe will decrease. At this time, the controller starts to control the adaptation mechanism 6 to operate in order to compensate for the wear.

[0041] Two assembly plates 312 are fixedly connected to the rear end face of the displacement slide rail 309. A flip arm 313 is installed between the two assembly plates 312 via a pivot. An anti-detachment block 314 is fixedly connected to the rear end of the flip arm 313. Anti-detachment protrusions 315 are fixedly connected to both sides of the anti-detachment block 314. A limiting groove is opened in the inner wall of the track groove 301. The anti-detachment protrusions 315 slide into the limiting groove and restrict the anti-detachment block 314, so as to avoid the problem of the anti-detachment block 314 being pulled out directly when the drawer is pulled out, which would cause the drawer to be accidentally disassembled.

[0042] The vertical height of the limiting groove is greater than the thickness of the anti-detachment protrusion 315. When the anti-detachment block 314 wears synchronously with the displacement slide rail 309, the anti-detachment block 314 moves downward in the limiting groove with the anti-detachment protrusion 315, ensuring that the lower roller 310 supports the anti-detachment block 314.

[0043] The displacement slide rail 309 has a threaded channel inside along the axial direction. An adjusting screw 316 is installed inside the threaded channel. The front end face of the flip arm 313 is an arc surface. A insertion groove 317 is located in the middle of the arc surface. The rear end of the adjusting screw 316 is movably inserted into the insertion groove 317. The front end of the adjusting screw 316 passes through the panel 104 and is fixedly connected to the rotating disk 318.

[0044] When the drawer is pulled out, it slides out along the displacement slide rail 309 until the anti-detachment protrusion 315 moves to the extreme position inside the limiting groove. Then the assembly plate 312 moves out. When the drawer is in a high position, the adjusting screw 316 is rotated by the rotating disk 318 to pull the adjusting screw 316 out of the insertion groove 317. Then the drawer can flip down with the pivot between the assembly plate 312 and the flip arm 313 as the center, so that people can maintain and repair the electrical components.

[0045] Please see Figure 7 , Figure 9 and Figure 10 The clamping mechanism 4 includes two telescopic rods 401, both of which are fixedly connected to the top surface of the inner cavity of the track housing 306 and located at both ends of the track housing 306. The bottom ends of the two telescopic rods 401 are fixedly connected to the same U-shaped clamp 402. Multiple upper rollers 403 are rotatably installed on the inner wall of the U-shaped clamp 402. The upper rollers 403 press on the top surface of the displacement slide rail 309, the flipping arm 313, and the anti-detachment block 314. An installation hole 404 is opened in the middle of the top surface of the U-shaped clamp 402. Only a rotating screw 405 is rotatably installed inside the installation hole 404. An internal threaded sleeve 406 is threaded onto the outer thread of the rotating screw 405. The top end of the internal threaded sleeve 406 is fixedly installed on the top surface of the inner cavity of the track housing 306. The power storage device 5 is installed between the rotating screw 405 and the U-shaped clamp 402.

[0046] Please see Figure 9 and Figure 10 The power storage device 5 includes a power storage plate 501, which is fixedly sleeved on the outside of the rotating screw 405. A power storage upper hole 502 is provided at the edge of the top surface of the power storage plate 501. A first short post 503 is rotatably inserted into the inside of the power storage upper hole 502. A spring 504 is fixedly connected to the bottom end of the first short post 503. The spring 504 is sleeved on the outside of the rotating screw 405. A second short post 505 is fixedly connected to the other end of the spring 504. A power storage lower hole 506 is provided on the U-shaped clamp 402. The bottom end of the second short post 505 is rotatably inserted into the power storage lower hole 506.

[0047] After the displacement slide rail 309, tilting arm 313, and anti-detachment block 314 wear out, they remain pressed against the lower roller 310 under gravity, resulting in downward displacement. Then, the spring 504, under its own torque, applies rotational force to the accumulator 501 through the insertion between the first short post 503 and the accumulator hole 502. This rotational force drives the accumulator 501 to rotate, and then the accumulator 501, along with the rotating screw 405... Rotate, and then the rotating screw 405 moves downward under the action of the threaded engagement between it and the internal threaded sleeve 406. Then the rotating screw 405 moves downward with the U-shaped clamp 402. The U-shaped clamp 402 presses against the top surface of the displacement slide rail 309, the flipping arm 313 and the anti-detachment block 314 through the upper roller 403, clamping the displacement slide rail 309, the flipping arm 313 and the anti-detachment block 314 to prevent the displacement slide rail 309, the flipping arm 313 and the anti-detachment block 314 from tilting or shaking.

[0048] Please see Figure 4 , Figure 5 , Figure 7 and Figure 8The adapting mechanism 6 includes a fixed guide rail 601, which is fixedly connected to the top surface of the inner cavity of the track groove 301 and located in the middle position. An I-beam slide rail 602 is slidably inserted inside the fixed guide rail 601. Both ends of the bottom surface of the I-beam slide rail 602 are equipped with upper inclined arms 603, which can be flipped up and down. The other end of the upper inclined arm 603 is inclined towards the middle of the fixed guide rail 601 and is equipped with an adapting block 604, which can be flipped. The bottom surface of the adapting block 604 is equipped with a lower inclined arm 605, which can be flipped. The bottom end of the lower inclined arm 605 is flipped and installed on the top surface of the track housing 306. The front end of the I-beam slide rail 602... A first screw 606 is installed in the internal thread of the adapting block 604, and a second screw 607 is installed in the internal thread of the other adapting block 604. The two ends of the first screw 606 and the second screw 607 are coaxially fixed together and close to each other. The helical directions of the first screw 606 and the second screw 607 are opposite. The rear end of the second screw 607 is fixedly connected to a drive motor 608. The drive motor 608 is electrically connected to the controller. A positioning groove 609 is opened on the rear side of the inner cavity of the track groove 301. The rear end of the drive motor 608 is rectangular and slides into the positioning groove 609 and can slide up and down.

[0049] When the controller controls the adaptation mechanism 6 to run, the controller first calculates the distance the displacement slide rail 309 descends based on the data detected by the probe. Then, the controller controls the drive motor 608 to run. Since the drive motor 608 is slidably inserted into the positioning slide groove 609, the drive motor 608 itself does not rotate. Next, the drive motor 608 rotates the second screw 607 and the first screw 606. Then, the two adaptation blocks 604 approach each other under the action of the threaded engagement between them and the first screw 606 and the second screw 607. Then, the angle between the upper inclined arm 603 and the lower inclined arm 605... As the angle gradually decreases, the lower inclined arm 605 moves the track housing 306 upward. Simultaneously, the second screw 607 drives the drive motor 608 to slide upward inside the positioning groove 609. Then, the track housing 306 moves upward along with its internal components, including the displacement slide rail 309 and the linkage bar 311, until the distance detected by the controller through the probe matches its internal preset value. Simultaneously, the linkage bar 311 moves the drawer upward, thus controlling the position and height of the drawer, ensuring the coaxiality of the contact post 207 and the extension tube 205, and ensuring that the extension tube 205 and the contact post 207 are connected.

[0050] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary; under the concept of the present invention, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of brevity.

[0051] This invention is intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A circuit connection device in a secondary control cabinet of a power distribution cabinet, comprising: The control cabinet (1) is characterized in that a drawer is installed inside the control cabinet (1) via a slide rail structure (3), and slide rail structures (3) are installed on both the left and right sides of the drawer. The drawer can be pulled out and flipped downwards. Electrical components are installed inside the drawer. A clamping mechanism (4) is installed inside the slide rail structure (3). The clamping mechanism (4) reduces the wear on the slide rail structure (3). A power storage device (5) is installed on the top surface of the clamping mechanism (4). The power storage device (5) adjusts the position of the clamping mechanism (4) inside the slide rail structure (3). An adaptation mechanism (6) is provided inside the slide rail structure (3) above the clamping mechanism (4). The adaptation mechanism (6) adjusts the slide rail structure (3) to maintain the position of the drawer. A contact structure (2) is installed inside the control cabinet (1). The drawer corresponds to three contact structures (2), and these three contact structures (2) are arranged horizontally at equal distances. The contact structure (2) in the middle is grounded through a wire, and the two contact structures (2) on both sides are connected to the positive and negative poles of the power supply through wires, respectively.

2. The circuit connection device in the secondary control cabinet of a power distribution cabinet according to claim 1, characterized in that, The control cabinet (1) includes a cabinet shell (101), with both the front and rear ends of the cabinet shell (101) being open. A back plate (102) is bolted to the back of the cabinet shell (101). A mounting plate (103) located in front of the back plate (102) is fixedly installed on the inner wall of the cabinet shell (101). A controller is installed on the rear side of the mounting plate (103). A drawer is located in front of the mounting plate (103) and inserted into the interior of the cabinet shell (101). The drawer includes a panel (104) and a receiving body (105). The panel (104) is fixedly installed on the slide rail structure (3). On the top, the back of the panel (104) abuts against the front of the cabinet shell (101). The left and right side walls of the cabinet shell (101) are thickened. Two slide rail structures (3) are symmetrically installed on the left and right side walls of the cabinet shell (101). The receiving body (105) is fixedly installed on the back of the panel (104) and inserted into the inside of the cabinet shell (101). Electrical components are installed on the bottom surface of the inner cavity of the receiving body (105). The contact structure (2) is installed between the mounting plate (103) and the receiving body (105). The contact structure (2) is electrically connected to the electrical components inside the receiving body (105).

3. The circuit connection device in the secondary control cabinet of a power distribution cabinet according to claim 2, characterized in that, The contact structure (2) includes a fixing hole (201), which is formed on the mounting plate (103). A horn tube (202) is fixedly inserted into the fixing hole (201). The other end of the horn tube (202) extends backward perpendicularly to the surface of the mounting plate (103). The rear end of the horn tube (202) is fixedly connected to a splicing inner tube (203). A splicing outer tube (204) is threaded onto the outside of the splicing inner tube (203). The rear end of the splicing outer tube (204) is fixedly connected to an extension tube (205). The rear end of the extension tube (205) is sealed. 5) The rear end face is fixedly connected to the first connector (206), the first connector (206) is connected to the wire, the extension tube (205) is inserted with the contact post (207), the contact post (207) is conductively connected to the extension tube (205), the front end of the contact post (207) passes through the splicing inner tube (203) and the horn tube (202) and is fixedly inserted into the rear side wall of the receiving body (105), the front end of the contact post (207) extends into the interior of the receiving body (105) and is fixedly connected with the second connector (208), the second connector (208) is electrically connected to the electrical components.

4. The circuit connection device in the secondary control cabinet of a power distribution cabinet according to claim 3, characterized in that, The horn tube (202) on the contact structure (2) connected to the ground by the wire is made of conductive material, and the horn tube (202) on the contact structure (2) connected to the power supply by the wire is made of insulating material; The rear end of the contact post (207) is connected to a truncated cone (209). The rear end of the truncated cone (209) abuts against the rear side of the inner cavity of the extension tube (205). Six wing strips (210) are fixedly connected to the surface of the truncated cone (209). The wing strips (210) are evenly distributed along the circumferential direction on the surface of the truncated cone (209). The wing strips (210) are elastically bent inside the extension tube (205). The outer side of the end of the wing strip (210) contacts the inner wall of the extension tube (205). After the wing strip (210) moves out of the extension tube (205), it is in a taut state. When the wing strip (210) is in a taut state, the straight distance from its free end to the axis of the cone (209) is greater than the diameter of the small opening of the horn tube (202) and less than the diameter of the large opening of the horn tube (202).

5. The circuit connection device in the secondary control cabinet of a power distribution cabinet according to claim 4, characterized in that, Six elastic strips (211) are fixedly connected at equal intervals along the circumferential direction between the front end face of the cone (209) and the rear end face of the contact post (207). The elastic strips (211) protrude outward in the middle and contact the inner wall of the extension tube (205). After the elastic strip (211) moves out of the extension tube (205), it will elastically recover and the protrusion in the middle of the elastic strip (211) will become smaller.

6. The circuit connection device in the secondary control cabinet of a power distribution cabinet according to claim 2, characterized in that, The slide rail structure (3) includes a track groove (301), which is opened on the front side of the cabinet shell (101). Two limiting strips (302) are fixedly connected to the inner wall of the track groove (301) away from the inner cavity of the cabinet shell (101). A sealing frame (303) is bolted to the front side of the cabinet shell (101). The rear side of the panel (104) abuts against the front side of the sealing frame (303). A rectangular hole (304) communicating with the track groove (301) is opened on the sealing frame (303). A first opening hole communicating with the track groove (301) is opened on the inner wall of the cabinet shell (101). 305), the front end of the first opening (305) passes through the sealing frame (303) and is open. A probe is fixedly embedded in the bottom surface of the inner cavity of the first opening (305). The track shell (306) is inserted into the inside of the track groove (301). Two fixed sliding grooves (307) are opened on both the left and right sides of the track shell (306). The limiting strip (302) is inserted into the fixed sliding groove (307) on the side of the track shell (306) away from the inner cavity of the cabinet shell (101). The sealing frame (303) blocks the track shell (306) in the track groove (301). The track shell (306) is close to the cabinet shell (101). A second opening (308) is provided on one side of the inner cavity. The second opening (308) is aligned with the first opening (305). The front end of the second opening (308) passes through the sealing frame (303). A displacement slide rail (309) is slidably inserted into the inside of the track housing (306). A clamping mechanism (4) is provided on the upper side of the displacement slide rail (309). Multiple lower rollers (310) are rotatably installed between the left and right sides of the inner cavity of the track housing (306). The multiple lower rollers (310) are evenly distributed. The lower rollers (310) roll on the bottom surface of the displacement slide rail (309). The front end of the displacement slide rail (309) exits through the rectangular hole ( 304) extends out and is fixedly connected to the back of the panel (104). The displacement slide rail (309) is fixedly connected to the side of the inner cavity of the cabinet shell (101) with a linkage bar (311) located in the middle. The vertical height of the first opening hole (305) and the second opening hole (308) is greater than the thickness of the linkage bar (311). The end of the linkage bar (311) facing the inner cavity of the cabinet shell (101) passes through the second opening hole (308) and the first opening hole (305) and is fixedly connected to the side of the receiving body (105). The probe monitors the position and height of the linkage bar (311) and the probe is connected to the controller for signal transmission.

7. The circuit connection device in the secondary control cabinet of a power distribution cabinet according to claim 6, characterized in that, Two assembly plates (312) are fixedly connected to the rear end face of the displacement slide rail (309). A rotating arm (313) is installed between the two assembly plates (312) via a pivot. An anti-detachment block (314) is fixedly connected to the rear end of the rotating arm (313). Anti-detachment protrusions (315) are fixedly connected to both the left and right sides of the anti-detachment block (314). A limiting groove is provided on the inner wall of the track groove (301). The anti-detachment protrusions (315) are slidably inserted into the limiting groove. The vertical height of the limiting groove is... The thickness is greater than that of the anti-detachment protrusion (315). The displacement slide rail (309) has a threaded channel along the axial direction inside. An adjusting screw (316) is installed in the threaded channel. The front end face of the flip arm (313) is an arc surface. A insertion groove (317) is provided in the middle of the arc surface. The rear end of the adjusting screw (316) is movably inserted into the insertion groove (317). The front end of the adjusting screw (316) passes through the panel (104) and is fixedly connected to the rotating disk (318).

8. The circuit connection device in the secondary control cabinet of a power distribution cabinet according to claim 6, characterized in that, The clamping mechanism (4) includes two telescopic rods (401). Both telescopic rods (401) are fixedly connected to the top surface of the inner cavity of the track housing (306) and located at both ends of the track housing (306). The bottom ends of the two telescopic rods (401) are fixedly connected to the same U-shaped clamp (402). Multiple upper rollers (403) are rotatably installed on the inner wall of the U-shaped clamp (402). The upper rollers (403) press against the displacement slide rail (309), the flipping arm (313), and the anti-detachment mechanism. On the top surface of block (314), a mounting hole (404) is provided in the middle of the top surface of the U-shaped clamp (402). The mounting hole (404) is rotatably mounted with a rotating screw (405). The external thread of the rotating screw (405) is threaded with an internal thread sleeve (406). The top end of the internal thread sleeve (406) is fixedly mounted on the top surface of the inner cavity of the track housing (306). The power storage device (5) is installed between the rotating screw (405) and the U-shaped clamp (402).

9. The circuit connection device in the secondary control cabinet of a power distribution cabinet according to claim 8, characterized in that, The power storage device (5) includes a power storage plate (501), which is fixedly sleeved on the outside of the rotating screw (405). A power storage upper hole (502) is provided at the edge of the top surface of the power storage plate (501). A first short column (503) is rotatably inserted into the inside of the power storage upper hole (502). A spring (504) is fixedly connected to the bottom end of the first short column (503). The spring (504) is sleeved on the outside of the rotating screw (405). A second short column (505) is fixedly connected to the other end of the spring (504). A power storage lower hole (506) is provided on the U-shaped clamp (402). The bottom end of the second short column (505) is rotatably inserted into the power storage lower hole (506).

10. The circuit connection device in the secondary control cabinet of a power distribution cabinet according to claim 8, characterized in that, The adaptation mechanism (6) includes a fixed guide rail (601), which is fixedly connected to the top surface of the inner cavity of the track groove (301) and located in the middle position. An I-beam slide rail (602) is slidably inserted inside the fixed guide rail (601). An upper inclined arm (603) is installed at both ends of the bottom surface of the I-beam slide rail (602) and can be flipped up and down. An adaptation block (604) is installed at the other end of the upper inclined arm (603) and can be flipped towards the middle of the fixed guide rail (601). A lower inclined arm (605) is installed on the bottom surface of the adaptation block (604) and can be flipped. The bottom end of the lower inclined arm (605) is flipped and installed on the top surface of the track housing (306). The first screw (606) is installed in the internal thread of the adaptation block (604) at the front end of the I-beam slide rail (602), and the second screw (607) is installed in the internal thread of the other adaptation block (604). The two ends of the first screw (606) and the second screw (607) are fixed together coaxially. The rear end of the second screw (607) is fixedly connected to the drive motor (608). The drive motor (608) is electrically connected to the controller. The rear side of the inner cavity of the track groove (301) is provided with a positioning slide groove (609). The rear end of the drive motor (608) is rectangular and slides into the positioning slide groove (609) and can slide up and down.

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