A 35kV main transformer incoming line cabinet

Abstract

The application discloses a 35kV main transformer incoming line cabinet and belongs to the technical field of the incoming line cabinet, which comprises an incoming line cabinet body, an incoming line terminal, an outgoing line terminal, a switch assembly and an incoming line connecting assembly, the incoming line terminal and the outgoing line terminal are fixedly arranged on the incoming line cabinet body, the incoming line terminal is electrically connected with the outgoing line terminal through the switch assembly, and the incoming line terminal is electrically connected with an incoming line cable through the incoming line connecting assembly. The incoming line cable is fixed on the incoming line terminal of the incoming line cabinet body through the incoming line connecting assembly, so that the loosening of the incoming line terminal and the incoming line cable can be effectively prevented, the electric connection between the incoming line terminal and the incoming line cable is fully realized, the collision between the conductive sliding sleeve and the plug-in conductive sleeve is prevented, and the operation reliability of the incoming line cabinet is effectively improved.

Description

Technical Field

[0001] This invention relates to the field of incoming line cabinet technology, and in particular to a 35kV main transformer incoming line cabinet. Background Technology

[0002] Incoming line cabinets are critical equipment for power input in power systems. They bear the heavy responsibility of power access and distribution, transmitting power from the external power grid or transformer to the busbar system. Simultaneously, they possess robust safety protection functions, rapidly cutting off power in the event of short circuits, overloads, undervoltage, or other faults to prevent the accident from escalating. Whether in industrial plants, commercial buildings, or residential communities, incoming line cabinets are core equipment ensuring the reliability and continuity of power supply, playing an irreplaceable role in the power system. However, in existing technology, the ends of the incoming cables are fixed with cable sleeves, which are then secured to the copper busbars of the incoming line cabinet with nuts. Over long-term use, these nuts can loosen, leading to unstable connections between the incoming cables and the copper busbars, unstable power transmission, and even overheating and burning between the incoming cables and the copper busbars. Summary of the Invention

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a 35kV main transformer incoming line cabinet.

[0004] The objective of this invention is achieved through the following technical solution:

[0005] A 35kV main transformer incoming line cabinet includes an incoming line cabinet body, incoming line terminals, outgoing line terminals, a switch assembly, and an incoming line connection assembly. The incoming line terminals and the outgoing line terminals are both fixedly mounted on the incoming line cabinet body. The incoming line terminals and the outgoing line terminals are electrically connected through the switch assembly, and the incoming line terminals and the incoming line cables are electrically connected through the incoming line connection assembly.

[0006] Furthermore, the incoming line connection assembly includes a plug sleeve, a conductive plate, a conductive outer threaded sleeve, and a conductive inner threaded sleeve. One end of the plug sleeve is detachably mounted on the incoming line terminal and engages with the incoming line terminal. The upper end of the conductive plate is fixedly connected to the other end of the plug sleeve. An upper conductive block and a lower conductive block are fixedly mounted on the lower part of the conductive plate. The lower conductive block has a first rotating hole that engages with the lower end of the conductive outer threaded sleeve, and the upper conductive block has a second rotating hole that engages with the upper end of the conductive outer threaded sleeve. The conductive outer threaded sleeve is coaxially arranged with the second rotating hole. A through conical hole is provided inside the conductive inner threaded sleeve. A conical cylindrical surface that mates with the through conical hole is provided on the outer wall of the conductive inner threaded sleeve. An internal thread is provided on the inner wall of the conical hole. An external thread that mates with the internal thread is provided on the conical cylindrical surface. A cable channel that passes through the conductive inner threaded sleeve and is used to install the incoming cable is provided inside the conductive inner threaded sleeve. A through contraction gap is provided between the cable channel and the conical cylindrical surface, and the contraction gap passes through the two ends of the conductive inner threaded sleeve.

[0007] Furthermore, the incoming line connection assembly also includes an end conductive locking sleeve, a locking top cone, and a locking top rod. The end conductive locking sleeve is fixedly disposed on the upper end of the conductive plate. A conductive blind hole that mates with the end of the incoming cable is provided on the lower end of the end conductive locking sleeve. A through adjustment hole is coaxially disposed on the bottom of the conductive blind hole. The locking top rod is disposed on the adjustment hole and threadedly engaged with the adjustment hole. A hemispherical head is coaxially fixedly disposed on the end of the locking top rod. An arc-shaped groove that mates with the hemispherical head is provided on the large-diameter end of the locking top cone. The hemispherical head is fixed in the arc-shaped groove by a fixed plate. The end of the locking top cone is inserted into the end of the incoming cable.

[0008] Furthermore, the switch assembly includes an arc-extinguishing switch, an isolating switch, and a switch bracket. The switch bracket is fixedly installed inside the incoming line cabinet. Both the arc-extinguishing switch and the isolating switch are fixedly installed on the switch bracket. The upper end of the arc-extinguishing switch is electrically connected to the outgoing terminal, the lower end of the arc-extinguishing switch is electrically connected to the upper end of the isolating switch, and the lower end of the isolating switch is electrically connected to the incoming terminal.

[0009] Furthermore, the disconnecting switch includes a conductive fixing base, a conductive sliding sleeve, a rotating rod, a stabilizing base, a plug-in conductive sleeve, and an isolation power transmission component. The conductive fixing base and the stabilizing base are both fixedly mounted on the switch bracket. The lower end of the rotating rod is rotatably mounted on the stabilizing base, and the upper end of the rotating rod is rotatably mounted inside the conductive sliding sleeve and threadedly engaged with the inner wall of the conductive sliding sleeve. The conductive sliding sleeve is slidably mounted inside the conductive fixing base and electrically connected to the conductive fixing base. The plug-in conductive sleeve is fixedly mounted on the arc-extinguishing switch and electrically connected to the arc-extinguishing switch. The plug-in conductive sleeve is provided with a conductive insertion hole that engages with the upper end of the conductive sliding sleeve. The isolation power transmission component is drively connected to the rotating rod, and the conductive fixing base is electrically connected to the incoming terminal.

[0010] Furthermore, the isolated power transmission component includes an isolated rotating shaft, a turbine, and a worm gear. The isolated rotating shaft is coaxially and fixedly connected to the worm gear, the worm gear meshes with the turbine gear, and the turbine gear is coaxially and fixedly connected to the rotating rod.

[0011] Furthermore, the arc-extinguishing switch includes a vacuum interrupting chamber, an upper conductive base, a lower conductive base, and an arc-extinguishing power transmission component. The upper conductive base and the lower conductive base are both fixedly mounted on the switch bracket. The upper conductive base is electrically connected to the output terminal, and the plug-in conductive sleeve is fixedly electrically connected to the lower conductive base. The stationary contact end of the vacuum interrupting chamber is electrically connected to the lower conductive base, and the moving contact end of the vacuum interrupting chamber is electrically connected to the upper conductive base. The arc-extinguishing power transmission component is drively connected to the moving contact end of the vacuum interrupting chamber.

[0012] Furthermore, the arc-extinguishing power transmission component includes an arc-extinguishing rotating shaft, a swing rod, and an insulating transmission rod. One end of the swing rod is fixedly mounted on the arc-extinguishing rotating shaft, and the other end of the swing rod is hinged to the upper end of the insulating transmission rod. The lower end of the insulating transmission rod is hinged to the moving contact end of the vacuum arc-extinguishing chamber.

[0013] Furthermore, the incoming line cabinet is provided with an air chamber, the switch assembly is disposed in the air chamber, the incoming line terminal is sealed and fixedly disposed on the lower part of the air chamber, and the outgoing line terminal is sealed and fixedly disposed on the upper part of the air chamber.

[0014] Furthermore, the conductive external threaded sleeve is provided with a through sliding hole, a lever is provided in the sliding hole, anti-detachment heads are provided at both ends of the lever, and anti-detachment grooves that cooperate with the anti-detachment heads are provided at both ends of the sliding hole.

[0015] The beneficial effects of this invention are:

[0016] 1) In this technology, the incoming cable is fixed to the incoming terminal of the incoming cabinet by the incoming connection component, which can effectively prevent the incoming terminal and the incoming cable from becoming loose, so that the incoming terminal and the incoming cable can be fully electrically connected, preventing high temperature and heat generation at the connection point, and effectively ensuring the safety of the incoming cabinet during use.

[0017] 2) In this technology, the use of conductive outer thread sleeve and conductive inner thread sleeve can effectively prevent the incoming cable from detaching and fully realize electrical connection. At the same time, the end conductive locking sleeve and locking top cone are set to further fix the incoming cable. The double fixation can better carry out power transmission.

[0018] 3) In this technology, the arc-extinguishing switch and the disconnecting switch in the switch assembly are connected more compactly, allowing for a smaller size of the incoming line cabinet. Simultaneously, in the disconnecting switch, the conductive sliding sleeve moves up and down to achieve electrical connection or separation with the plug-in conductive sleeve, preventing collisions between the conductive sliding sleeve and the plug-in conductive sleeve and effectively improving the operational reliability of the incoming line cabinet. Attached Figure Description

[0019] Figure 1 This is the main view connection structure diagram of this incoming line cabinet;

[0020] Figure 2 This is a side view of the connection structure of this incoming line cabinet;

[0021] Figure 3 This is a cross-sectional view of the connection structure of the incoming line connection assembly.

[0022] Figure 4 for Figure 3 A schematic diagram of the AA cross-section;

[0023] Figure 5 for Figure 3 BB cross-sectional diagram;

[0024] Figure 6 for Figure 3 A magnified structural diagram at point C;

[0025] Figure 7 This is a schematic diagram of the internal connection structure of the switch assembly;

[0026] In the diagram, 1-inlet cabinet, 2-inlet terminal, 3-outlet terminal, 4-inlet cable, 5-plug sleeve, 6-conductive plate, 7-conductive outer threaded sleeve, 8-conductive inner threaded sleeve, 9-upper conductive block, 10-lower conductive block, 11-cable channel, 12-contraction gap, 13-end conductive locking sleeve, 14-locking top cone, 15-locking top rod, 16-conductive blind hole, 17-hemispherical head, 18-arc groove, 19-fixed plate, 20-switch bracket, 21-conductive fixing seat, 22-conductive sliding sleeve, 2 3-Rotating rod, 24-Stabilizing seat, 25-Insertion conductive sleeve, 26-Isolation rotating shaft, 27-Turbine, 28-Worm gear, 29-Vacuum interrupter chamber, 30-Upper conductive seat, 31-Lower conductive seat, 32-Anti-arc rotating shaft, 33-Swing rod, 34-Insulated transmission rod, 35-Sliding hole, 36-Toggle rod, 37-Anti-detachment head, 38-Anti-detachment groove, 39-Conductive insertion hole, 40-First copper busbar, 41-Second copper busbar, 42-Isolation power component, 43-Anti-arc power component, 44-Insertion pin. Detailed Implementation

[0027] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. 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.

[0028] See Figures 1-7 The present invention provides a technical solution:

[0029] A 35kV main transformer incoming line cabinet includes an incoming line cabinet body 1, incoming line terminals 2, outgoing line terminals 3, a switch assembly, and an incoming line connection assembly. Incoming line terminals 2 and outgoing line terminals 3 are both fixedly mounted on the incoming line cabinet body 1. The incoming line terminals 2 and outgoing line terminals 3 are electrically connected via the switch assembly, and the incoming line terminals 2 are electrically connected to the incoming line cable 4 via the incoming line connection assembly. An air-filled chamber is provided inside the incoming line cabinet body 1. The switch assembly is located inside the air-filled chamber. The incoming line terminals 2 are sealed and fixedly mounted on the lower part of the air-filled chamber, and the outgoing line terminals 3 are sealed and fixedly mounted on the upper part of the air-filled chamber. The system includes an air chamber located in the upper part of the incoming line cabinet 1. The switch assembly is completely sealed within this chamber. Both the incoming terminal 2 and the outgoing terminal 3 are existing technologies. The outgoing terminal 3 is sealed and fixedly mounted on the top of the air chamber, and is electrically connected to the arc-extinguishing switch in the switch assembly via a first copper busbar 40. The incoming terminal 2 is sealed and fixedly mounted on the bottom of the air chamber, and the isolating switch in the switch assembly is electrically connected to the incoming terminal 2 via a second copper busbar 41. An incoming line chamber is located in the lower part of the incoming line cabinet 1. One end of the incoming terminal 2 is located within this chamber. An incoming line connection assembly is located within the chamber and is electrically connected at one end to the incoming terminal 2. The other end of the incoming line connection assembly is electrically connected to the incoming cable 4. The incoming cable 4 transmits external high-voltage electricity into the incoming line cabinet 1. A through-hole for the incoming cable 4 is located at the bottom of the incoming line chamber. A mechanism chamber is provided on one side of the incoming line cabinet 1. The mechanism chamber is arranged in parallel with the inflation chamber. An isolation power component 42 and an arc extinguishing power component 43 are fixedly installed in the mechanism chamber. Both the isolation power component 42 and the arc extinguishing power component 43 are existing technologies. The isolation rotating shaft 26 in the disconnect switch is connected to the output shaft of the isolation power component 42. The arc extinguishing rotating shaft 32 in the arc extinguishing switch is connected to the output shaft of the arc extinguishing power component 43. Both the isolation rotating shaft 26 and the arc extinguishing rotating shaft 32 pass through the side wall of the inflation chamber, and both the isolation rotating shaft 26 and the arc extinguishing rotating shaft 32 are sealed to the side wall of the inflation chamber.

[0030] In some embodiments, the inlet connection assembly includes a plug sleeve 5, a conductive plate 6, a conductive outer threaded sleeve 7, and a conductive inner threaded sleeve 8. One end of the plug sleeve 5 is detachably mounted on and engages with the inlet terminal 2. The upper end of the conductive plate 6 is fixedly connected to the other end of the plug sleeve 5. An upper conductive block 9 and a lower conductive block 10 are fixedly mounted on the lower part of the conductive plate 6. The lower conductive block 10 has a first rotating hole that engages with the lower end of the conductive outer threaded sleeve 7, and the upper conductive block 9 has a second rotating hole that engages with the upper end of the conductive outer threaded sleeve 7. The first rotating hole and the second rotating hole are coaxially arranged. A through conical hole is provided inside the conductive outer threaded sleeve 7. A conical cylindrical surface that mates with the conical hole is provided on the outer wall of the conductive inner threaded sleeve 8. An internal thread is provided on the inner wall of the conical hole. An external thread that mates with the internal thread is provided on the conical cylindrical surface. A cable channel 11 that mates with the incoming cable 4 is provided inside the conductive inner threaded sleeve 8. A through contraction gap 12 is provided between the cable channel 11 and the conical cylindrical surface, and the contraction gap 12 passes through the two ends of the conductive inner threaded sleeve 8. The plug sleeve 5, conductive plate 6, conductive outer threaded sleeve 7, and conductive inner threaded sleeve 8 are all made of conductive material. The inlet terminal 2 is horizontally set on the inlet cabinet 1. The plug sleeve 5 is horizontally inserted into the end of the inlet terminal 2. The end of the inlet terminal 2 is conical. The inner wall of the plug sleeve 5 is also conical and matches the inlet terminal 2. A first vertical insertion hole is provided in the middle of the inlet terminal 2. The first vertical insertion hole can be a blind hole or a through hole. The opening of the first vertical insertion hole faces upward. The plug sleeve 5 is provided with a second vertical insertion hole that matches the first vertical insertion hole and passes through it. The lower end of the plug pin 44 passes through the second vertical insertion hole from the top and is inserted into the first vertical insertion hole. This can effectively prevent the plug sleeve 5 from separating from the inlet terminal 2, and at the same time ensure a full electrical connection between the plug sleeve 5 and the inlet terminal 2. The plug-in sleeve 5 and the conductive plate 6 are integrally formed and connected together. The plug-in sleeve 5 is horizontally positioned, and the conductive plate 6 is vertically positioned. The plug-in sleeve 5 and the conductive plate 6 are perpendicular to each other. The upper conductive block 9 and the lower conductive block 10 are fixedly mounted on the conductive plate 6 to install the conductive outer threaded sleeve 7. The outer side of the conductive outer threaded sleeve 7 is a stepped shaft. The middle diameter of the conductive outer threaded sleeve 7 is larger than the diameters at both ends. The two ends of the conductive outer threaded sleeve 7 are in full contact with the first rotating hole and the second rotating hole, respectively. The stepped parts at both ends of the conductive outer threaded sleeve 7 rest on the upper conductive block 9 and the lower conductive block 10, respectively. In order to better transmit electrical energy, the outer wall of the conductive plate 6 is provided with an arc groove. The outer wall of the conductive outer threaded sleeve 7 is set in the arc groove and matches the arc groove.Because the conductive inner threaded sleeve 8 and the conductive outer threaded sleeve 7 are connected by threads, and the conductive outer threaded sleeve 7 has a through conical hole, and the outer wall of the conductive inner threaded sleeve 8 has a conical cylindrical surface that mates with the conical hole, after the shrinkage gap 12 is set on the conductive inner threaded sleeve 8, the conductive inner threaded sleeve 8 and the conductive outer threaded sleeve 7 are deformed by relative rotation, so that the conductive outer threaded sleeve 7 presses the conductive inner threaded sleeve 8, and the cable channel 11 inside the conductive inner threaded sleeve 8 presses the incoming cable 4, so that the incoming cable 4, the conductive outer threaded sleeve 7, the conductive inner threaded sleeve 8, the upper conductive block 9, the lower conductive block 10 and the conductive plate 6 are fully electrically connected together, fully realizing conductivity, and the incoming cable 4 will not separate from the conductive inner threaded sleeve 8.

[0031] In some embodiments, the conductive external threaded sleeve 7 is provided with a through sliding hole 35, and a lever 36 is provided in the sliding hole 35. Anti-detachment heads 37 are provided at both ends of the lever 36, and anti-detachment grooves 38 that cooperate with the anti-detachment heads 37 are provided at both ends of the sliding hole 35. The sliding hole 35 is not connected to the conical through hole in the conductive external threaded sleeve 7. The lever 36 can slide within the sliding hole 35. After the lever 36 slides, the anti-detachment heads 37 at its ends can retract into the anti-detachment grooves 38. When a worker holds the lever 36, the conductive external threaded sleeve 7 rotates. Because the conductive internal threaded sleeve 8 and the incoming cable 4 are increasingly compressed, the conductive internal threaded sleeve 8 does not rotate when the conductive external threaded sleeve 7 rotates. This better locks the conductive external threaded sleeve 7 and the conductive internal threaded sleeve 8 together. Meanwhile, one end of the lever 36 can contact the conductive plate 6, thus preventing the conductive outer threaded sleeve 7 from rotating and effectively preventing the conductive outer threaded sleeve 7 from loosening the conductive inner threaded sleeve 8, further preventing the incoming cable 4 from separating from the conductive inner threaded sleeve 8. The anti-detachment head 37 can be completely placed within the anti-detachment groove 38. During the process of rotating the conductive outer threaded sleeve 7 with the lever 36, the lever 36 will not interfere with the conductive plate 6 through sliding.

[0032] In some embodiments, the incoming line connection assembly further includes an end conductive locking sleeve 13, a locking top cone 14, and a locking top rod 15. The end conductive locking sleeve 13 is fixedly disposed on the upper end of the conductive plate 6. A conductive blind hole 16 that mates with the end of the incoming cable 4 is provided on the lower end of the end conductive locking sleeve 13. A through adjustment hole is coaxially disposed on the bottom of the conductive blind hole 16. The locking top rod 15 is disposed on the adjustment hole and threadedly mates with the adjustment hole. A hemispherical head 17 is coaxially fixedly disposed on the end of the locking top rod 15. An arc groove 18 that mates with the hemispherical head 17 is provided on the large diameter end of the locking top cone 14. The hemispherical head 17 is fixed in the arc groove 18 by a fixed plate 19. The end of the locking top cone 14 is inserted into the end of the incoming cable 4. The end conductive locking sleeve 13 is fixedly connected to the conductive plate 6 and electrically connected to the conductive plate 6. The end of the incoming cable 4 is inserted into the conductive blind hole 16 of the end conductive locking sleeve 13, which effectively prevents the incoming cable 4 from being unable to be fixed. Since the incoming cable 4 is made of multiple sets of thin wires wound together, in order to prevent the incoming cable 4 from coming out of the conductive blind hole 16, a locking top cone 14 is set to be inserted from the end of the incoming cable 4, so that the end of the incoming cable 4 is tightly attached to the inner wall of the conductive blind hole 16, further enabling the incoming cable 4 to be electrically connected to the end conductive locking sleeve 13, which can effectively transmit electrical energy. The movement of the locking top cone 14 is pushed by the locking top rod 15. The locking top rod 15 is threadedly engaged with the end conductive locking sleeve 13. The conductive blind hole 16, the locking top cone 14 and the locking top rod 15 are coaxially arranged. An arc-shaped groove 18 is provided on the end of the locking top cone 14 for installing a hemispherical head 17. The hemispherical head 17 works in conjunction with the fixed plate 19 to connect the locking top cone 14 and the locking top rod 15 together. During use, the locking top cone 14 can be moved by rotating the locking top rod 15.

[0033] In some embodiments, the switch assembly includes an arc-extinguishing switch, a disconnecting switch, and a switch bracket 20. The switch bracket 20 is fixedly installed inside the incoming line cabinet 1. Both the arc-extinguishing switch and the disconnecting switch are fixedly installed on the switch bracket 20. The upper end of the arc-extinguishing switch is electrically connected to the outgoing terminal 3, and the lower end of the arc-extinguishing switch is electrically connected to the upper end of the disconnecting switch. The lower end of the disconnecting switch is electrically connected to the incoming terminal 2. The incoming line cabinet is used for high-voltage power transmission, which uses three-phase power transmission. Therefore, three sets of arc-extinguishing switches and three sets of disconnecting switches are installed on the switch bracket 20, and the three sets of arc-extinguishing switches are electrically connected to the three sets of disconnecting switches respectively. The switch bracket 20 consists of two insulating plates, both in the prior art. The arc-extinguishing switch and the disconnecting switch are both installed between the two insulating plates, with the arc-extinguishing switch positioned above the disconnecting switch. Under the action of the arc-extinguishing switch and the disconnecting switch, the two insulating plates are fixedly connected together, and the two insulating plates are fixedly connected to the inner wall of the air chamber of the incoming line cabinet 1. Current flows through the incoming cable 4 to the incoming terminal 2, and then through the isolating switch to the arc-extinguishing switch. The current flows out through the outgoing terminal 3. During the opening process, the arc-extinguishing switch opens first, followed by the isolating switch; during the closing process, the isolating switch closes first, followed by the arc-extinguishing switch.

[0034] In some embodiments, the disconnecting switch includes a conductive fixing base 21, a conductive sliding sleeve 22, a rotating rod 23, a stabilizing base 24, a plug-in conductive sleeve 25, and an isolation power transmission component. The conductive fixing base 21 and the stabilizing base 24 are both fixedly mounted on the switch bracket 20. The lower end of the rotating rod 23 is rotatably mounted on the stabilizing base 24, and the upper end of the rotating rod 23 is rotatably mounted inside the conductive sliding sleeve 22 and threadedly engaged with the inner wall of the conductive sliding sleeve 22. The conductive sliding sleeve 22 is slidably mounted inside the conductive fixing base 21 and electrically connected to the conductive fixing base 21. The plug-in conductive sleeve 25 is fixedly mounted on the arc-extinguishing switch and electrically connected to the arc-extinguishing switch. The plug-in conductive sleeve 25 is provided with a conductive insertion hole 39 that engages with the upper end of the conductive sliding sleeve 22. The isolation power transmission component is drivenly connected to the rotating rod 23, and the conductive fixing base 21 is electrically connected to the incoming terminal 2. The isolated power transmission component includes an isolated rotating shaft 26, a turbine 27, and a worm gear 28. The isolated rotating shaft 26 and the worm gear 28 are coaxially and fixedly connected. The worm gear 28 meshes with the turbine gear 27. The turbine gear 27 is coaxially and fixedly connected with the rotating rod 23. Both ends of the conductive fixing base 21 are connected to the switch bracket 20, and both ends of the stabilizing base 24 are also connected to the switch bracket 20. The conductive fixing base 21 is provided with a guide hole that cooperates with the conductive sliding sleeve 22. The conductive sliding sleeve 22 can only move up and down in the sliding hole and cannot rotate in the guide hole. The outer wall of the conductive sliding sleeve 22 cooperates with the inner wall of the guide hole and maintains an electrical connection. Since the outer wall of the rotating rod 23 is threadedly engaged with the inner wall of the conductive sliding sleeve 22, the rotating rod 23 only rotates and does not move on the stabilizing base 24. Therefore, when the rotating rod 23 rotates, it drives the conductive sliding sleeve 22 to move down. When the conductive sliding sleeve 22 moves up, it can be inserted into the plug-in conductive sleeve 25. At this time, it can conduct electricity with the arc extinguishing switch. When the conductive sliding sleeve 22 moves down and separates from the plug-in conductive sleeve 25, it cannot conduct electricity with the arc extinguishing switch. A guide protrusion is fixedly provided on the outer wall of the conductive sliding sleeve 22, and the guide protrusion is arranged along the length direction of the conductive sliding sleeve 22. A guide groove that mates with the guide protrusion is provided in the guide hole of the conductive fixing seat 21. This arrangement prevents the conductive sliding sleeve 22 from rotating relative to the conductive fixing seat 21. The lower end of the rotating rod 23 is a stepped shaft. The stable seat 24 is provided with a stepped through hole that mates with the stepped shaft. The lower end of the rotating rod 23 passes through the stepped through hole and is coaxially fixedly connected to the turbine 27. The worm gear 28 is connected to three sets of turbines 27 at the same time. Each set of turbines 27 is connected to a rotating rod 23. The function of the isolating rotating shaft 26 is to connect the worm gear 28 and the isolating power component 42 to realize the transmission of force. Both the turbine 27 and the worm gear 28 are made of insulating material. A stabilizing block is provided on the switch bracket 20. The stabilizing block is provided with a rotating hole that mates with the worm gear 28, which serves to limit the movement of the worm gear 28.The conductive sliding sleeve 22 is moved by rotating rod 23 to insert into or remove from the plug-in conductive sleeve 25 without collision. Compared to opening and closing the switch by rotation, this technology effectively prevents damage to the incoming line cabinet because there is no collision. The conductive fixing base 21 and the incoming line terminal 2 are connected by a copper busbar as in the prior art.

[0035] In some embodiments, the arc-extinguishing switch includes a vacuum interrupting chamber 29, an upper conductive base 30, a lower conductive base 31, and an arc-extinguishing power transmission component. The upper conductive base 30 and the lower conductive base 31 are both fixedly mounted on the switch bracket 20. The upper conductive base 30 is electrically connected to the output terminal 3, and the plug-in conductive sleeve 25 is fixedly electrically connected to the lower conductive base 31. The stationary contact end of the vacuum interrupting chamber 29 is electrically connected to the lower conductive base 31, and the moving contact end of the vacuum interrupting chamber 29 is electrically connected to the upper conductive base 30. The arc-extinguishing power transmission component is drively connected to the moving contact end of the vacuum interrupting chamber 29. The arc-extinguishing power transmission component includes an arc-extinguishing rotating shaft 32, a swing rod 33, and an insulating transmission rod 34. One end of the swing rod 33 is fixedly mounted on the arc-extinguishing rotating shaft 32, and the other end of the swing rod 33 is hinged to the upper end of the insulating transmission rod 34. The lower end of the insulating transmission rod 34 is hinged to the moving contact end of the vacuum interrupting chamber 29. The vacuum interrupter 29 is existing technology. The stationary contact of the vacuum interrupter 29 is electrically connected to the lower conductive base 31. Both ends of the lower conductive base 31 are fixed to the switch bracket 20. Both ends of the upper conductive base 30 are also fixed to the switch bracket 20. A through conductive hole is provided in the middle of the upper conductive base 30. The moving contact of the vacuum interrupter 29 moves up and down within the conductive hole and is electrically connected to the conductive hole. The upper conductive base 30 is electrically connected to the outgoing terminal 3 via a copper busbar, as is used in existing technology. The function of the arc-extinguishing power transmission component is to drive the vacuum interrupter 29 to open and close. The arc-extinguishing rotating shaft 32 transmits the power from the arc-extinguishing power component 43 to the swing rod 33. Three sets of swing rods 33 are provided on the arc-extinguishing rotating shaft 32. Each set of swing rods 33 is connected to an insulating transmission rod 34, and each insulating transmission rod 34 drives the moving contact of one vacuum interrupter 29 to move. The plug-in conductive sleeve 25 is directly fixed to the lower conductive base 31, making the entire switch assembly structure more compact.

[0036] In the description of this invention, it should be understood that the terms "upper", "lower", "bottom", "one end", "top", "middle", "other end", "coaxial", "one side", "inner", "front", "center", "both ends", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0037] In this invention, unless otherwise explicitly specified and limited, the terms "set", "install", "connect", "fix", "hinged", etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components or the interaction between two components. Unless otherwise explicitly limited, those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0038] The above description is merely a preferred embodiment of the present invention. It should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the concept described herein through the above teachings or related technologies or knowledge. Modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A 35kV main transformer incoming line cabinet, characterized in that: It includes an inlet cabinet (1), an inlet terminal (2), an outlet terminal (3), a switch assembly, and an inlet connection assembly. The inlet terminal (2) and the outlet terminal (3) are both fixedly mounted on the inlet cabinet (1). The inlet terminal (2) and the outlet terminal (3) are electrically connected through the switch assembly. The inlet terminal (2) and the inlet cable (4) are electrically connected through the inlet connection assembly. The incoming line connection assembly includes a plug sleeve (5), a conductive plate (6), a conductive outer threaded sleeve (7), and a conductive inner threaded sleeve (8). One end of the plug sleeve (5) is detachably mounted on the incoming line terminal (2) and engages with the incoming line terminal (2). The upper end of the conductive plate (6) is fixedly connected to the other end of the plug sleeve (5). An upper conductive block (9) and a lower conductive block (10) are fixedly mounted on the lower part of the conductive plate (6). The lower conductive block (10) has a first rotating hole that engages with the lower end of the conductive outer threaded sleeve (7), and the upper conductive block (9) has a second rotating hole that engages with the upper end of the conductive outer threaded sleeve (7). The first rotating hole and the second rotating hole are coaxially arranged. The conductive external thread sleeve (7) is provided with a through conical through hole. The outer wall of the conductive internal thread sleeve (8) is provided with a conical cylindrical surface that mates with the conical through hole. The inner wall of the conical through hole is provided with an internal thread. The conical cylindrical surface is provided with an external thread that mates with the internal thread. The conductive internal thread sleeve (8) is provided with a through cable channel (11) for installing the incoming cable (4). A through contraction gap (12) is provided between the cable channel (11) and the conical cylindrical surface. The contraction gap (12) passes through the two ends of the conductive internal thread sleeve (8). The incoming line connection assembly also includes an end conductive locking sleeve (13), a locking top cone (14), and a locking top rod (15). The end conductive locking sleeve (13) is fixedly disposed on the upper end of the conductive plate (6). The lower end of the end conductive locking sleeve (13) is provided with a conductive blind hole (16) that mates with the end of the incoming cable (4). A through adjustment hole is coaxially disposed on the bottom of the conductive blind hole (16). The locking top rod (15) is disposed on the adjustment hole and threadedly mates with the adjustment hole. A hemispherical head (17) is coaxially fixedly disposed on the end of the locking top rod (15). An arc groove (18) that mates with the hemispherical head (17) is provided on the large diameter end of the locking top cone (14). The hemispherical head (17) is fixed in the arc groove (18) by a fixed plate (19). The end of the locking top cone (14) is inserted into the end of the incoming cable (4).

2. The 35kV main transformer incoming line cabinet according to claim 1, characterized in that: The switch assembly includes an arc-extinguishing switch, an isolating switch, and a switch bracket (20). The switch bracket (20) is fixedly installed inside the incoming line cabinet (1). The arc-extinguishing switch and the isolating switch are both fixedly installed on the switch bracket (20). The upper end of the arc-extinguishing switch is electrically connected to the outgoing terminal (3). The lower end of the arc-extinguishing switch is electrically connected to the upper end of the isolating switch. The lower end of the isolating switch is electrically connected to the incoming terminal (2).

3. A 35kV main transformer incoming line cabinet according to claim 2, characterized in that: The disconnecting switch includes a conductive fixing seat (21), a conductive sliding sleeve (22), a rotating rod (23), a stabilizing seat (24), a plug-in conductive sleeve (25), and an isolation power transmission component. The conductive fixing seat (21) and the stabilizing seat (24) are both fixedly mounted on the switch bracket (20). The lower end of the rotating rod (23) is rotatably mounted on the stabilizing seat (24), and the upper end of the rotating rod (23) is rotatably mounted inside the conductive sliding sleeve (22) and screwed to the inner wall of the conductive sliding sleeve (22). The conductive sliding sleeve (22) is slidably disposed in the conductive fixing seat (21) and electrically connected to the conductive fixing seat (21). The plug-in conductive sleeve (25) is fixedly disposed on the arc extinguishing switch and electrically connected to the arc extinguishing switch. The plug-in conductive sleeve (25) is provided with a conductive insertion hole (39) that cooperates with the upper end of the conductive sliding sleeve (22). The isolation power transmission component is connected to the rotating rod (23) in a transmission connection. The conductive fixing seat (21) is electrically connected to the incoming terminal (2).

4. A 35kV main transformer incoming line cabinet according to claim 3, characterized in that: The isolated power transmission component includes an isolated rotating shaft (26), a turbine (27) and a worm (28). The isolated rotating shaft (26) is coaxially and fixedly connected to the worm (28). The worm (28) meshes with the turbine (27). The turbine (27) is coaxially and fixedly connected to the rotating rod (23).

5. A 35kV main transformer incoming line cabinet according to claim 3 or 4, characterized in that: The arc-extinguishing switch includes a vacuum arc-extinguishing chamber (29), an upper conductive base (30), a lower conductive base (31), and an arc-extinguishing power transmission component. The upper conductive base (30) and the lower conductive base (31) are both fixedly mounted on the switch bracket (20). The upper conductive base (30) is electrically connected to the output terminal (3). The plug-in conductive sleeve (25) is fixedly electrically connected to the lower conductive base (31). The stationary contact end of the vacuum arc-extinguishing chamber (29) is electrically connected to the lower conductive base (31). The moving contact end of the vacuum arc-extinguishing chamber (29) is electrically connected to the upper conductive base (30). The arc-extinguishing power transmission component is drivenly connected to the moving contact end of the vacuum arc-extinguishing chamber (29).

6. A 35kV main transformer incoming line cabinet according to claim 5, characterized in that: The arc-extinguishing power transmission component includes an arc-extinguishing rotating shaft (32), a swing rod (33), and an insulating transmission rod (34). One end of the swing rod (33) is fixedly mounted on the arc-extinguishing rotating shaft (32), and the other end of the swing rod (33) is hinged to the upper end of the insulating transmission rod (34). The lower end of the insulating transmission rod (34) is hinged to the moving contact end of the vacuum arc-extinguishing chamber (29).

7. A 35kV main transformer incoming line cabinet according to any one of claims 1-4, characterized in that: An air chamber is provided inside the incoming line cabinet (1), the switch assembly is located inside the air chamber, the incoming line terminal (2) is sealed and fixedly located on the lower part of the air chamber, and the outgoing line terminal (3) is sealed and fixedly located on the upper part of the air chamber.

8. A 35kV main transformer incoming line cabinet according to any one of claims 1-4, characterized in that: The conductive external threaded sleeve (7) is provided with a through sliding hole (35), and a lever (36) is provided in the sliding hole (35). Anti-detachment heads (37) are provided on both ends of the lever (36), and anti-detachment grooves (38) that cooperate with the anti-detachment heads (37) are provided on both ends of the sliding hole (35).

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