Inlet wire copper bar isolation protective cover, locking structure and locking method thereof

Abstract

The invention relates to the related technical field of electrical equipment, in particular to an incoming line copper bar isolation protective cover, a locking structure and a locking method thereof, and the incoming line copper bar isolation protective cover comprises a plurality of protective covers arranged in a shell; at least two sets of locking structures are symmetrically arranged at the side ends of the protective covers, and the locking structures can be inserted into locking grooves formed by the side ends of the adjacent protective covers and clamped. The locking structure comprises a sleeve plate and a telescopic plate, the sleeve plate is rotatably arranged at the side end of the protective cover, the telescopic plate is slidably connected with the sleeve plate, and limiting assemblies are symmetrically arranged on the telescopic plate. And when the telescopic plates are inserted into the locking grooves, the limiting assemblies are pressed to deform, so that the telescopic plates are locked after being completely inserted into the locking grooves, stable connection of the two protective covers is achieved, and the situation that when the grid type protective covers are assembled into the shell, interference is generated between the grid type protective covers and the inner wall of the shell is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field related to electrical equipment, and in particular to an isolation protective cover for an incoming copper busbar, a locking structure and a locking method thereof. Background Art

[0002] The copper busbar isolation and protection cover of the distribution cabinet is a device used to protect the copper busbar in the distribution cabinet. Its main purpose is to prevent electrical short circuits and electric shock accidents and to improve the safety and reliability of the equipment. In the distribution cabinet, copper busbars are widely used due to their excellent conductivity, but exposed copper busbars are prone to cause safety accidents, so appropriate isolation and protection measures need to be taken. To ensure safety, the copper busbars in the distribution box should be covered with insulating sheaths, and the joints of the busbars and busbars should be covered with insulating protective covers to ensure that there are no exposed live parts in the box, and the busbars and feeders are insulated and closed. This approach can effectively prevent problems such as current short circuits and leakage, and improve the safety of the distribution system.

[0003] In the existing power distribution cabinets on the power distribution market, the busbars and the branch copper bars are mostly overlapped with joint protective covers, which are large in size and unsightly. Heat shrink tubes are used to isolate the copper bars, and it is time-consuming and laborious to put on the heat shrink tubes. Therefore, multiple copper bar isolation protective covers are designed in a grid manner to isolate the upper and lower copper bars horizontally and the left and right copper bars vertically. This device integrates copper bar isolation and personnel safety protection, which can not only isolate copper bars that are close to each other, but also prevent people from accidentally touching the live copper bars. When the protective covers of two adjacent copper bars are connected, a snap-on method is used for quick installation, resulting in at least two protrusions on the side ends of the protective covers, which increases the occupied space. At the same time, the protrusions on the outermost protective cover after the grid connection are easily interfered with other equipment. Summary of the invention

[0004] The object of the present invention is to provide an isolation protective cover and a locking structure for an incoming copper busbar to solve the problems raised in the above-mentioned background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions: An isolation protective cover and locking structure for an incoming copper busbar, comprising a plurality of protective covers arranged in a housing and distributed in a grid shape; At least two sets of locking structures are symmetrically arranged at the side ends of the protective cover, and the locking structures can be inserted into the locking grooves formed at the adjacent side ends of the protective cover and clamped; The locking structure includes a sleeve plate rotatably arranged at the side end of the protective cover and a telescopic plate slidably connected to the sleeve plate. Limiting components are symmetrically arranged on the telescopic plate. When the sleeve plate rotates, the telescopic plate is driven to move relative to the sleeve plate, and the limiting components perform the expansion work and can be locked with the inner end of the locking groove.

[0006] The incoming copper busbar isolation protective cover and locking structure as described above: at least one group of placement grooves are formed at the side end of the protective cover, and a driving shaft fixedly connected to the sleeve plate is rotatably arranged in the placement groove, and the driving shaft is controlled to rotate by a driving switch arranged on the protective cover.

[0007] The incoming copper busbar isolation protective cover and locking structure as described above: the drive switch includes a rod slidably set on the protective cover, the rod is set along the axial direction of the drive shaft, and a ball is movably set in the rod, and the ball is slidably matched with the threaded groove formed on the drive shaft.

[0008] The incoming copper busbar isolation protective cover and locking structure as described above: the protective cover is formed with a plug-in slot for the plug rod to slide, at least one group of strip grooves are formed in the plug-in slot, and the plug rod is provided with a strip block that slides with the strip groove.

[0009] As described above, the incoming copper busbar isolation protective cover and locking structure: the sleeve plate is symmetrically formed with slide grooves, the telescopic plate is provided with a convex column that slides with the slide groove, and the convex column passes through one end of the slide groove and is inserted into the arc groove formed by the inner wall of the placement groove, and the convex column is slidably connected to the slide groove.

[0010] As described above, the incoming copper busbar isolation protective cover and locking structure: the limiting assembly includes an abutment block symmetrically arranged on the side end of the telescopic plate, the abutment block is rotatably connected to the telescopic plate, and a spring sheet is formed at the end of the abutment block away from the telescopic plate, and the deflection of the abutment block is driven by a threaded pusher arranged on the telescopic plate.

[0011] The incoming copper busbar isolation protective cover and locking structure as described above: the threaded pusher includes a screw rod rotatably arranged in the telescopic plate, the screw rod is threadedly connected to a threaded sleeve slidably connected to the telescopic plate, the threaded sleeve is rotatably connected to a connecting rod, one end of the connecting rod away from the threaded sleeve is rotatably connected to the abutment block, and the screw rod is connected to the drive shaft through a transmission assembly arranged on the sleeve plate.

[0012] The above-mentioned inlet copper bar isolation protective cover and locking structure: the transmission assembly includes a plug-in cylinder rotatably arranged in the sleeve plate, the plug-in cylinder is arranged along the axial direction of the screw rod, one end of the screw rod is inserted into the plug-in cylinder and is slidably connected with the plug-in cylinder; It also includes a transmission shaft rotatably arranged on the sleeve plate, the transmission shaft is rotatably connected to the plug-in cylinder through a bevel gear set, a gear is fixedly arranged on the transmission shaft, and the gear is meshed with a gear ring arranged in the placement groove.

[0013] A method for locking the isolation protective cover of the incoming copper busbar described in any one of the above items comprises the following steps: Step 1: First, align the side end of one of the protective covers provided with the heat shrink tube with the side end of the other protective cover not provided with the heat shrink tube; Step 2: Control the sleeve plate to rotate. When the sleeve plate rotates, the telescopic plate is driven to rotate synchronously and the telescopic plate slides relative to the sleeve plate. At the same time, the threaded pusher on the telescopic plate squeezes the limit assembly, causing the limit assembly to deflect relative to the telescopic plate. Step 3: Control the telescopic plate to align with the locking groove and then insert it. The limit assembly is deformed under the extrusion of the locking groove until the telescopic plate abuts against the inner end of the locking groove. Under the action of elasticity, the limit assembly is locked in the locking groove.

[0014] Compared with the prior art, the present invention has the following beneficial effects: By controlling the sleeve plate and the telescopic plate to deflect, and the telescopic plate moves relative to the sleeve plate during the deflection process, the space occupied by the locking structure at the side end of the protective cover can be reduced. When the sleeve plate deflects, the limit assembly is driven to deflect relative to the telescopic plate, further reducing the area occupied by the locking structure. When the telescopic plate is inserted into the locking groove, the notch of the locking groove squeezes the limit assembly, causing the limit assembly to deform under pressure. When the telescopic plate is inserted until it abuts against the end of the locking groove, the pressure on the limit assembly disappears. Under the action of elasticity, one end of the limit assembly is clamped with the inner wall of the locking groove, thereby achieving a stable connection between the two protective covers and avoiding interference between the grid-type protective cover and the inner wall of the outer shell when it is assembled into the outer shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural diagram of the incoming copper busbar isolation protective cover and locking structure.

[0016] Figure 2 This is a structural schematic diagram of the isolation protective cover of the incoming copper busbar, the protective cover and the locking groove in the locking structure.

[0017] Figure 3 This is a structural diagram of the isolation protective cover for the incoming copper busbar, the protective cover in the locking structure, and the placement slot.

[0018] Figure 4 It is a structural schematic diagram of the incoming copper busbar isolation protective cover, the drive shaft in the locking structure and the locking structure.

[0019] Figure 5 This is a structural diagram of the incoming copper busbar isolation protective cover, the drive switch and the drive shaft in the locking structure.

[0020] Figure 6 This is a structural diagram of the incoming copper busbar isolation protective cover, the sleeve plate and the telescopic plate in the locking structure.

[0021] Figure 7 This is a schematic diagram of the structure of the incoming copper busbar isolation protective cover and the transmission components in the locking structure.

[0022] Figure 8 This is a structural diagram of the incoming copper busbar isolation protective cover, the screw rod and the plug-in cylinder in the locking structure.

[0023] Fig. 9 This is a schematic diagram of the isolation protective cover of the incoming copper busbar and the threaded push-piece structure in the locking structure.

[0024] Fig.10 This is a structural schematic diagram of the incoming copper busbar isolation protective cover, the threaded sleeve and the abutment block in the locking structure.

[0025] In the figure: 1. housing; 2. protective cover; 201. locking groove; 202. placement groove; 203. arc groove; 3. pressing plate; 4. plug rod; 401. strip block; 5. driving shaft; 501. threaded groove; 6. sleeve plate; 601. slide groove; 7. telescopic plate; 701. boss; 8. abutment block; 801. spring piece; 9. sleeve; 901. gear ring; 10. transmission shaft; 11. gear; 12. bevel gear set; 13. plug-in cylinder; 1301. guide groove; 14. screw rod; 1401. guide block; 15. threaded sleeve; 16. slider; 17. connecting rod. DETAILED DESCRIPTION

[0026] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0027] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0028] In addition, in order to better illustrate the present application, numerous specific details are provided in the specific embodiments below. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, and elements well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0029] The present invention aims to propose a locking method for an incoming copper bar isolation protective cover, specifically an incoming copper bar isolation protective cover and a locking structure, which can complete the rapid assembly and fixation of multiple protective covers while ensuring the stability of the protective cover connection and solving the problem of interference between the locking structure at the side end of the protective cover and the shell. The specific implementation method is as follows: See also Figure 1 to Figure 10 In an embodiment of the present invention, an isolation protective cover and locking structure for an incoming copper busbar includes a plurality of protective covers 2 arranged in a grid shape in a housing 1; At least two sets of locking structures are symmetrically arranged at the side ends of the protective cover 2, and the locking structures can be inserted into the locking grooves 201 formed at the adjacent side ends of the protective cover 2 and clamped; The locking structure includes a sleeve plate 6 rotatably arranged at the side end of the protective cover 2 and a telescopic plate 7 slidably connected to the sleeve plate 6. A limiting component is symmetrically arranged on the telescopic plate 7. When the sleeve plate 6 rotates, the telescopic plate 7 is driven to move relative to the sleeve plate 6. The limiting component performs the expansion work and can be locked with the inner end of the locking groove 201.

[0030] In detail, in the present invention, when two adjacent protective covers 2 are installed, the control sleeve 6 and the telescopic plate 7 are deflected, and the telescopic plate 7 moves relative to the sleeve 6 during the deflection process to reduce the space occupied by the locking structure at the side end of the protective cover 2. When the sleeve 6 is deflected, the limit assembly is driven to deflect relative to the telescopic plate 7, further reducing the area occupied by the locking structure. At the same time, when the telescopic plate 7 is inserted into the locking groove 201, the notch of the locking groove 201 squeezes the limit assembly, causing the limit assembly to deform under pressure. When the telescopic plate 7 is inserted until it abuts against the end of the locking groove 201, the pressure on the limit assembly disappears. Under the action of elasticity, one end of the limit assembly is clamped with the inner wall of the locking groove 201, thereby achieving a stable connection between the two protective covers 2 and avoiding interference between the mesh-type protective cover 2 and the inner wall of the outer shell 1 when it is assembled into the outer shell 1.

[0031] In the embodiment of the present invention, the copper bar isolation protective cover 2 adopts a grid design, horizontally isolates the upper and lower copper bars, and vertically isolates the left and right copper bars. The protective cover covers the internal overlap surface of the copper bar, and plays an overall protective role, which is simple and beautiful; at the same time, the grid design is compatible with the characteristics of the internal copper bar overlap style, which is not only suitable for different switches but also suitable for the conversion of AC or DC incoming lines. Compared with the traditional protective plate, this piece integrates copper bar isolation and personnel safety protection, which can not only isolate the copper bars that are close to each other, but also prevent people from accidentally touching the live copper bars. At the same time, it can cover the inside to make the integrity better. The heat dissipation port is reserved on the surface, and the air inlet is reserved at the bottom, which can naturally form an air duct to achieve heat dissipation of the copper bar.

[0032] It should be noted that: on the upper and lower and left and right side ends of the protective cover 2 along the length direction, two side ends are rotatably provided with locking structures, and locking grooves 201 are formed on the two side ends to ensure that multiple protective covers 2 can be combined together in a grid form.

[0033] Preferably, at least one group of placement grooves 202 are formed at the side end of the protective cover 2, and a driving shaft 5 fixedly connected to the sleeve plate 6 is rotatably arranged in the placement groove 202, and the driving shaft 5 is controlled to rotate by a driving switch arranged on the protective cover 2.

[0034] It should be noted that the purpose of setting the locking structure in the placement groove 202 is to prevent the locking structure from protruding out of the protective cover 2 when not in use, to prevent the locking structure on the outermost protective cover 2 from interfering with the outer shell 1 after multiple protective covers 2 are assembled together, and to prevent the locking structure on the protective cover 2 from colliding with the outside world and being damaged.

[0035] As a further solution of the present invention, please refer to Figure 3 and Figure 5 The driving switch includes an insertion rod 4 slidably arranged on the protective cover 2, the insertion rod 4 is arranged along the axial direction of the driving shaft 5, and a ball is movably arranged in the insertion rod 4, and the ball is slidably matched with the threaded groove 501 formed on the driving shaft 5.

[0036] Specifically, when controlling the rotation of the driving shaft 5, the pressing plate 3 set on the insertion rod 4 is manually pressed to make the insertion rod 4 move relative to the driving shaft 5, and the ball always moves in a direction parallel to the axis of the driving shaft 5, so that the ball squeezes the threaded groove 501 to realize the movement of the driving shaft 5, ensuring that the sleeve plates 6 located on the same side end can deflect at the same time, and ensuring that the deflection angles of multiple sleeve plates 6 remain consistent, so that multiple protective covers 2 can be quickly connected when installed.

[0037] Preferably, the protective cover 2 is formed with an insertion groove for the insertion rod 4 to slide, at least one group of strip grooves is formed in the insertion groove, and the insertion rod 4 is provided with a strip block 401 that slides with the strip grooves.

[0038] It should be noted that: when the insertion rod 4 moves, it drives the bar block 401 to move synchronously. Under the restriction of the bar groove, the bar block 401 always slides in the bar groove to realize the sliding connection between the insertion rod 4 and the plug-in groove. At the same time, it can limit the rotation of the driving shaft 5 and drive the insertion rod 4 to rotate synchronously, and ensure that the insertion rod 4 can only move. With the cooperation of the ball and the threaded groove 501, the rotation requirement of the driving shaft 5 is realized.

[0039] As a further solution of the present invention, please refer to Figure 3 A sliding groove 601 is symmetrically formed on the sleeve plate 6, and a convex column 701 is provided on the telescopic plate 7 to slide with the sliding groove 601, and one end of the convex column 701 passes through the sliding groove 601 and is inserted into the arc groove 203 formed on the inner wall of the placement groove 202, and the convex column 701 is slidably connected to the arc groove 203.

[0040] Preferably, the thread groove 501 is formed by an arc offset set with the drive shaft 5 as the center, so that when the sleeve plate 6 and the telescopic plate 7 are offset with the rotation of the drive shaft 5, the telescopic plate 7 moves relative to the sleeve plate 6 under the extrusion of the arc groove 203. At this time, the protrusion 701 moves relatively in the slide groove 601, so that when the sleeve plate 6 and the telescopic plate 7 are deflected, the telescopic plate 7 can automatically deflect relative to the sleeve plate 6.

[0041] As a further solution of the present invention, please refer to Fig.10 The limiting assembly includes an abutment block 8 symmetrically arranged at the side end of the telescopic plate 7, the abutment block 8 is rotatably connected to the telescopic plate 7, and a spring piece 801 is formed at one end of the abutment block 8 away from the telescopic plate 7, and the deflection of the abutment block 8 is driven by a threaded pusher arranged on the telescopic plate 7.

[0042] In the initial state, the abutment block 8 is in an inclined state. Under the action of the threaded pusher, the abutment block 8 is driven to deflect, and the deflection angle of the abutment block 8 should not be too large, and it is ensured that the length of the two abutment blocks 8 after being stretched is smaller than the size of the outer notch of the locking groove 201, further reducing the space occupied by the locking structure at the side end of the protective cover 2, and ensuring that after the telescopic plate 7 is inserted into the locking groove 201, under the action of the telescopic plate 7 and the abutment block 8, a stable connection between the two protective covers 2 is achieved.

[0043] As a further solution of the present invention, please refer to Figure 8 and Fig. 9 The threaded pusher includes a screw rod 14 rotatably arranged in the telescopic plate 7, a threaded sleeve 15 is threadedly connected to the screw rod 14, and sliders 16 slidably connected to the telescopic plate 7 are arranged on both sides of the threaded sleeve 15. A connecting rod 17 is rotatably connected to the slider 16, and one end of the connecting rod 17 away from the threaded sleeve 15 is rotatably connected to the abutment block 8. The screw rod 14 is connected to the drive shaft 5 through a transmission assembly arranged on the sleeve plate 6.

[0044] The transmission assembly includes a plug-in cylinder 13 rotatably disposed in the sleeve plate 6, the plug-in cylinder 13 is disposed along the axial direction of the screw rod 14, one end of the screw rod 14 is inserted into the plug-in cylinder 13 and is slidably connected to the plug-in cylinder 13; It also includes a transmission shaft 10 rotatably arranged on the sleeve plate 6 , the transmission shaft 10 is rotatably connected to the plug-in cylinder 13 through a bevel gear set 12 , a gear 11 is fixedly arranged on the transmission shaft 10 , and the gear 11 is meshed with a gear ring 901 arranged on the placement groove 202 .

[0045] Preferably, a sleeve 9 is provided along the axial direction of the driving shaft 5 , the sleeve 9 is rotatably connected to the driving shaft 5 , and the placement groove 202 is fixed.

[0046] Preferably, at least one set of guide grooves 1301 is formed in the inner groove of the plug-in cylinder 13 , and a guide block 1401 slidably connected to the guide grooves 1301 is provided on the screw rod 14 .

[0047] To elaborate, when the above-mentioned driving shaft 5 rotates, it drives the sleeve plate 6 to rotate synchronously, so that the gear 11 makes a circular motion along the axis of the driving shaft 5. Under the meshing transmission of the gear 11 and the gear ring 901, the transmission shaft 10 rotates, and under the speed increase transmission of the bevel gear set 12, the rotation requirement of the plug-in cylinder 13 is realized. Among them, under the limiting action of the guide groove 1301 and the guide block 1401, the sliding connection between the screw rod 14 and the plug-in cylinder 13 is realized, and the synchronous rotation of the screw rod 14 is driven without affecting the rotation of the plug-in cylinder 13. When the screw rod 14 rotates, it drives the threaded sleeve 15 to make a linear motion along the axis of the screw rod 14, and drives the connecting rod 17 to move synchronously to realize the expansion of the abutment block 8, so that the length of the two abutment blocks 8 after expansion is greater than the notch of the locking groove 201, to ensure that when the telescopic plate 7 is inserted into the locking groove 201, the notch of the locking groove 201 squeezes the spring piece 801, so that the spring piece 801 is compressed and deformed.

[0048] It should be noted that the locking groove 201 is arranged in a convex structure, and the size of the outer groove is smaller than that of the inner groove, so that the abutment block 8 is squeezed when it abuts against the outer groove, and the spring piece 801 is deformed under pressure so that the telescopic plate 7 and the abutment block 8 can be smoothly inserted into the locking groove 201. When the spring piece 801 moves to the inner groove, the pressure on the spring piece 801 disappears. Under the action of the elastic potential energy stored in the spring piece 801 itself, the spring piece 801 rebounds to abut against the side wall of the inner groove. At this time, the telescopic plate 7 and the inner groove are also in an abutment state, so as to realize the stable connection of the two protective covers 2, and they cannot move left and right or up and down.

[0049] A locking method for an isolation protective cover of an incoming copper busbar as described in any one of the above, comprising the following steps: Step 1: First, align the side end of one of the protective covers 2 provided with the heat shrink tube with the side end of the other protective cover 2 not provided with the heat shrink tube; Step 2: Control the sleeve plate 6 to rotate. When the sleeve plate 6 rotates, the telescopic plate 7 is driven to rotate synchronously and the telescopic plate 7 slides relative to the sleeve plate 6. At the same time, the threaded pusher on the telescopic plate 7 squeezes the limit assembly, causing the limit assembly to deflect relative to the telescopic plate 7. Step 3: Control the telescopic plate 7 to be aligned with the locking groove 201 and then insert it. The limit assembly is deformed under the extrusion of the notch of the locking groove 201 until the telescopic plate 7 abuts against the inner end of the locking groove 201. Under the action of elasticity, the limit assembly is locked in the locking groove 201.

[0050] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0051] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An inlet copper bar isolation protective cover and locking structure, comprising a plurality of protective covers (2) arranged in a grid shape in a housing (1), It is characterized by: At least two groups of locking structures are symmetrically arranged at the side ends of the protective cover (2), and the locking structures can be inserted into locking grooves (201) formed at adjacent side ends of the protective cover (2) and clamped; The locking structure comprises a sleeve plate (6) rotatably arranged at the side end of the protective cover (2) and a telescopic plate (7) slidably connected to the sleeve plate (6), and a limit assembly is symmetrically arranged on the telescopic plate (7). When the sleeve plate (6) rotates, the telescopic plate (7) is driven to move relative to the sleeve plate (6), and the limit assembly performs a spreading operation and can be locked with the inner end of the locking groove (201).

2. The isolation protective cover and locking structure of the incoming copper busbar according to claim 1 is characterized in that: At least one group of placement grooves (202) is formed at the side end of the protective cover (2), and a drive shaft (5) fixedly connected to the sleeve plate (6) is rotatably arranged in the placement groove (202), and the rotation of the drive shaft (5) is controlled by a drive switch arranged on the protective cover (2).

3. The isolation protective cover and locking structure of the incoming copper busbar according to claim 2 is characterized in that: The drive switch comprises an insertion rod (4) slidably arranged on the protective cover (2), the insertion rod (4) being arranged along the axial direction of the drive shaft (5), and a ball is movably arranged in the insertion rod (4), and the ball is slidably matched with a thread groove (501) formed on the drive shaft (5).

4. The isolation protective cover and locking structure of the incoming copper busbar according to claim 3 is characterized in that: The protective cover (2) is formed with an insertion groove for the insertion rod (4) to slide, at least one group of strip grooves is formed in the insertion groove, and the insertion rod (4) is provided with a strip block (401) that slidably cooperates with the strip grooves.

5. The isolation protective cover and locking structure of the incoming copper busbar according to claim 4 is characterized in that: The sleeve plate (6) is symmetrically formed with a slide groove (601), and the telescopic plate (7) is provided with a boss (701) that slidably cooperates with the slide groove (601), and one end of the boss (701) passes through the slide groove (601) and is inserted into an arc groove (203) formed on the inner wall of the placement groove (202), and the boss (701) is slidably connected to the arc groove (203).

6. The isolation protective cover and locking structure of the incoming copper busbar according to claim 2 is characterized in that: The limiting assembly comprises an abutment block (8) symmetrically arranged at a side end of the telescopic plate (7); the abutment block (8) is rotatably connected to the telescopic plate (7); and a spring sheet (801) is formed at one end of the abutment block (8) away from the telescopic plate (7); the deflection of the abutment block (8) is driven by a threaded pusher arranged on the telescopic plate (7).

7. The isolation protective cover and locking structure of the incoming copper busbar according to claim 6 is characterized in that: The threaded pusher comprises a screw rod (14) rotatably arranged in the telescopic plate (7), a threaded sleeve (15) being threadedly connected to the screw rod (14), sliders (16) slidably connected to the telescopic plate (7) being arranged on both sides of the threaded sleeve (15), a connecting rod (17) being rotatably connected to the slider (16), an end of the connecting rod (17) away from the threaded sleeve (15) being rotatably connected to the abutment block (8), and the screw rod (14) being connected to the drive shaft (5) via a transmission assembly arranged on the sleeve plate (6).

8. The isolation protective cover and locking structure of the incoming copper busbar according to claim 7 is characterized in that: The transmission assembly comprises a plug-in cylinder (13) rotatably arranged in the sleeve plate (6), the plug-in cylinder (13) being arranged along the axial direction of the screw rod (14), one end of the screw rod (14) being inserted into the plug-in cylinder (13) and being slidably connected to the plug-in cylinder (13); It also includes a transmission shaft (10) rotatably arranged on the sleeve plate (6), the transmission shaft (10) being rotatably connected to the plug-in cylinder (13) via a bevel gear set (12), a gear (11) being fixedly arranged on the transmission shaft (10), and the gear (11) being meshed with a gear ring (901) arranged on the placement groove (202).

9. A locking method for the isolation and protective cover of the incoming copper busbar as claimed in claims 1-8, characterized in that: The following steps are involved: Step 1: first align the side end of one of the protective covers (2) provided with the heat shrink tube with the side end of the other protective cover (2) not provided with the heat shrink tube; Step 2: Controlling the sleeve plate (6) to rotate, the sleeve plate (6) drives the telescopic plate (7) to rotate synchronously and the telescopic plate (7) slides relative to the sleeve plate (6), and at the same time, the threaded pusher on the telescopic plate (7) squeezes the limit assembly, causing the limit assembly to deflect relative to the telescopic plate (7); Step 3: Control the telescopic plate (7) to be aligned with the locking groove (201) and then insert it, and the limit assembly is deformed under the extrusion of the notch of the locking groove (201) until the telescopic plate (7) abuts against the inner end of the locking groove (201), and under the action of elasticity, the limit assembly is locked in the locking groove (201).

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