Centering device for connection of 35kV polyvinyl non-crosslinking insulated power cable

Abstract

The invention relates to the technical field of power equipment, and discloses a centering device for 35kV polyvinyl non-crosslinking insulated power cable connection, which comprises a frame, a supporting mechanism, a clamping mechanism and a translation driving mechanism. The supporting mechanism is arranged below the frame and used for supporting the frame, and the height of the supporting mechanism is adjustable. The clamping mechanisms are arranged above the frame, the two clamping mechanisms are arranged in a spaced mode in the first direction, the first direction is the length direction of the frame, each clamping mechanism comprises a first driving assembly, an upper clamping plate and a lower clamping plate, the upper clamping plate is arranged above the lower clamping plate, and a first containing groove used for containing a cable is formed in the lower clamping plate; the first containing grooves of the two clamping mechanisms are coaxially arranged, the first driving assembly is used for driving the upper clamping plate to move in the second direction so that the upper clamping plate can be matched with the lower clamping plate to clamp the cable located in the first containing grooves, and the second direction is the height direction of the supporting mechanism and is perpendicular to the first direction. And the translation driving mechanism is arranged on the frame.

Description

Technical Field

[0001] The invention relates to the technical field of power equipment, in particular to a centering device for connecting 35kV polyethylene-based non-cross-linked insulated power cables. Background Art

[0002] The power industry developed early and overhead lines are widely used. However, the criss-crossing overhead lines not only affect the appearance of the city, but also the power cable poles and other facilities are basically set on the sidewalks, which is inconvenient for pedestrians to travel and has certain safety hazards. Therefore, promoting the undergrounding of overhead lines and laying underground cables has become a key link in urban transformation.

[0003] Due to the long cable laying distance, cable joints need to be installed between two adjacent cable sections for connection. The cables at both ends of the cable joints must have high coaxiality to ensure the installation quality of the cable joints. At present, the coaxial centering of 35kV polyethylene-based non-cross-linked insulated power cables needs to be adjusted by manual control. Due to certain limitations of this method, the coaxiality deviation of the cables at both ends is large. When making cable joints, it is necessary to connect the cable conductors. The connection methods generally include crimping, welding and fusion. If there is no device to control its coaxiality at this time, it is easy to cause eccentricity, bending and dislocation of the conductors at both ends after connection, and affect the repair of the conductor shielding layer and cable insulation layer outside the conductor, thereby reducing the quality of the cable joints. In addition, for direct buried underground cables and cables in cable corridors, the joint production environment is more complicated. Due to the narrow space in the cable well and cable corridor, there are cable support rods and other facilities such as pipelines. Ordinary cable centering brackets are difficult to apply due to their large size.

[0004] Therefore, there is an urgent need for a centering device for connecting 35kV polyethylene-based non-cross-linked insulated power cables to solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a centering device for connecting 35kV polyethylene-based non-cross-linked insulated power cables, which can keep two sections of cables at high coaxiality and is convenient for use in cable wells and cable corridors.

[0006] To achieve this object, the present invention adopts the following technical solutions:

[0007] A centering device for connecting a 35kV polyethylene-based non-cross-linked insulated power cable, comprising:

[0008] frame;

[0009] A supporting mechanism, which is arranged below the frame and is used to support the frame, and the height of the supporting mechanism is adjustable;

[0010] Two clamping mechanisms, the clamping mechanisms are arranged above the frame, the two clamping mechanisms are arranged at intervals along a first direction, the first direction is the length direction of the frame, the clamping mechanism comprises a first driving assembly, an upper clamping plate and a lower clamping plate, the upper clamping plate is arranged above the lower clamping plate, the lower clamping plate is provided with a first receiving groove for receiving the cable, the first receiving grooves of the two clamping mechanisms are coaxially arranged, the first driving assembly is used to drive the upper clamping plate to move along a second direction so that the upper clamping plate can cooperate with the lower clamping plate to clamp the cable located in the first receiving groove, the second direction is the height direction of the support mechanism, and the second direction is perpendicular to the first direction;

[0011] The translation driving mechanism is arranged on the frame and is used to drive the two clamping mechanisms to move closer to and away from each other along the first direction.

[0012] As an improvement of the above technical solution, the first driving component includes:

[0013] A support frame, which is fixedly arranged on the lower clamping plate;

[0014] A first threaded rod extending along the second direction, the bottom end of the first threaded rod passing through the support frame and extending in a direction close to the lower clamping plate, the top end of the first threaded rod being exposed from the support frame, the first threaded rod being threadedly connected to the support frame, the upper clamping plate being arranged at the bottom end of the first threaded rod and being rotatably connected to the first threaded rod;

[0015] A first hand wheel is fixedly arranged on the top end of the first threaded rod.

[0016] As an improvement of the above technical solution, the first driving component further includes:

[0017] A bearing seat, which is arranged at the bottom end of the first threaded rod;

[0018] a first bearing, wherein the first threaded rod is rotatably connected to the bearing seat via the first bearing;

[0019] The clamping plate seat is fixedly arranged at the bottom end of the bearing seat, and the upper clamping plate is fixedly arranged at the bottom end of the clamping plate seat.

[0020] As an improvement of the above technical solution, the translation drive mechanism and the clamping mechanism are arranged in a one-to-one correspondence, and the translation drive mechanism includes:

[0021] A sliding seat, which is arranged on the frame and can slide relative to the frame along the first direction, and the clamping mechanism is arranged on the sliding seat of the corresponding translation drive mechanism and can move relative to the frame with the sliding seat;

[0022] The second driving assembly is disposed on the frame and is used to drive the sliding seat to move along the first direction.

[0023] As an improvement of the above technical solution, the second driving component includes:

[0024] A second threaded rod extending along the first direction and threadedly connected to the frame, wherein a first end of the second threaded rod is rotatably connected to the sliding seat;

[0025] The second hand wheel is fixedly disposed on the second end of the second threaded rod.

[0026] As an improvement of the above technical solution, a guide assembly is also included, and the guide assembly includes:

[0027] A guide rod extending along the first direction, the sliding seat being provided with guide holes corresponding to the guide rods one by one, the guide rods being inserted into the corresponding guide holes to be slidably connected with the sliding seat;

[0028] A spring is sleeved on each of the guide rods and is arranged between the sliding seats of the two translation drive mechanisms.

[0029] As an improvement of the above technical solution, two support mechanisms are provided, and the two support mechanisms are arranged at intervals along the first direction, and the support mechanism includes:

[0030] A support rod extending along the second direction and having a top end fixedly connected to the frame;

[0031] A support tube extending along the second direction, wherein the bottom end of the support rod extends into the support tube;

[0032] a third driving assembly, which is disposed on the support tube and connected to the support rod, and is used to drive the support rod to move relative to the support tube along the second direction;

[0033] A plurality of legs, the top ends of which are fixedly connected to the bottom end of the support tube, the plurality of legs are sequentially arranged along the circumferential direction of the axis of the support tube, and the legs are arranged at an angle to the support tube.

[0034] As an improvement of the above technical solution, the third driving component includes:

[0035] A rotating sleeve, which is rotatably arranged at the top end of the support tube and is coaxially arranged with the support tube, the support rod is provided with an external thread, the rotating sleeve is provided with an internal thread, and the rotating sleeve is threadedly connected with the support rod;

[0036] A limiting member, wherein the support rod is provided with a strip groove extending along the second direction, the support tube is provided with a first threaded hole, the limiting member is inserted into the first threaded hole and is threadedly connected to the support tube, and one end of the limiting member inserted into the support tube extends into the strip groove.

[0037] As an improvement of the above technical solution, the length of each of the legs is adjustable.

[0038] As an improvement of the above technical solution, the supporting legs include:

[0039] A fixed cylinder, the top end of which is fixedly connected to the bottom end of the support cylinder;

[0040] A movable section, the top end of which is inserted into the bottom end of the fixed tube, the movable section is coaxially arranged with the fixed tube, and the movable section can move relative to the fixed tube along the axial direction of the fixed tube;

[0041] The first fixing member is connected to the fixing tube and is used to fix the relative position between the movable section and the fixing tube.

[0042] Compared with the prior art, the present invention has the following beneficial effects:

[0043] The centering device for connecting 35kV polyethylene-based non-cross-linked insulated power cables of the present invention has a support mechanism for supporting a frame, and two clamping mechanisms are arranged on the frame for respectively clamping two sections of cables to be connected. Since the first receiving grooves of the lower clamping plates of the two clamping mechanisms are coaxially arranged, the two sections of cables clamped in the two first receiving grooves can maintain high coaxiality. In addition, the height of the support mechanism is adjustable, and the translation drive mechanism can drive the two clamping mechanisms to approach and move away from each other along the first direction, so that when the centering device for connecting 35kV polyethylene-based non-cross-linked insulated power cables of the present invention performs centering connection of two sections of cables in a cable well or cable corridor, the height of the frame and the support mechanism thereon, and the distance between the two clamping mechanisms can be adjusted according to the actual needs of the on-site environment, so as to avoid interference between the frame and the support mechanism and the cable support rods and pipelines and other facilities in the on-site environment when the centering device for connecting 35kV polyethylene-based non-cross-linked insulated power cables is placed at the connection between the two sections of cables, thereby ensuring the smooth use of the centering device for connecting 35kV polyethylene-based non-cross-linked insulated power cables. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 This is a schematic diagram of a 35kV polyethylene-based non-cross-linked insulated power cable connection centering device provided by an embodiment of the present invention when used on a flat ground;

[0045] Figure 2It is a side view of a centering device for connecting a 35kV polyethylene-based non-cross-linked insulated power cable provided in an embodiment of the present invention (part of the structure is a cross-sectional view);

[0046] Figure 3 Schematic diagram of the structure of the centralizing device for connecting 35kV polyethylene non-cross-linked insulated power cables provided by the embodiment of the present invention Figure 1 (Some structures are cross-sectional views);

[0047] Figure 4 Schematic diagram of the structure of the centralizing device for connecting 35kV polyethylene non-cross-linked insulated power cables provided by the embodiment of the present invention Figure 2 ;

[0048] Figure 5 The schematic diagram of the partial structure of the centering device for connecting power cables provided in the embodiment of the present invention is Figure 3 ;

[0049] Figure 6 It is a schematic diagram of a 35kV polyethylene-based non-cross-linked insulated power cable connection centering device provided by an embodiment of the present invention when used on a pothole-prone ground (part of the structure is a cross-sectional view).

[0050] In the figure:

[0051] 1. Frame; 11. Middle partition;

[0052] 2. Support mechanism;

[0053] 21. support rod; 211. strip groove;

[0054] 22. Support tube;

[0055] 23. The third drive assembly;

[0056] 231. Rotating sleeve; 232. Position limiting member; 233. Third bearing; 234. Handle;

[0057] 24. Outriggers;

[0058] 241, fixed cylinder; 242, movable section; 243, first fixing member;

[0059] 3. Clamping mechanism;

[0060] 31. A first drive assembly;

[0061] 311, support frame; 3111, support plate; 3112, support nut;

[0062] 312, first threaded rod; 313, first hand wheel; 314, bearing seat; 315, first bearing; 316, clamping plate seat;

[0063] 32. upper clamping plate; 321. second receiving groove;

[0064] 33. Lower clamping plate; 331. First receiving groove;

[0065] 4. Translation drive mechanism;

[0066] 41. Sliding seat;

[0067] 42. A second drive assembly;

[0068] 421, second threaded rod; 422, second hand wheel; 423, second bearing;

[0069] 43. a second fixing member;

[0070] 5. Guide assembly; 51. Guide rod; 52. Spring. DETAILED DESCRIPTION

[0071] The specific implementation of the present invention is further described in detail below in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0072] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0073] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0074] In the description of this embodiment, the terms "upper", "lower", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0075] like Figure 1-Figure 6 As shown, a 35kV polyethylene-based non-cross-linked insulated power cable connection centering device according to an embodiment of the present invention is used for coaxial centering when making a 35kV polyethylene-based non-cross-linked insulated power cable joint. The 35kV polyethylene-based non-cross-linked insulated power cable connection centering device comprises a frame 1, a support mechanism 2, a translation drive mechanism 4 and two clamping mechanisms 3. The support mechanism 2 is arranged below the frame 1 and is used to support the frame 1. The height of the support mechanism 2 is adjustable. The clamping mechanism 3 is arranged above the frame 1, and the two clamping mechanisms 3 are arranged at intervals along the first direction, which is the length direction of the frame 1. The clamping mechanism 3 includes a first driving assembly 31, an upper clamping plate 32 and a lower clamping plate 33. The upper clamping plate 32 is arranged above the lower clamping plate 33, and the lower clamping plate 33 is provided with a first receiving groove 331 for receiving the cable. The first receiving grooves 331 of the two clamping mechanisms 3 are arranged coaxially. The first driving assembly 31 is used to drive the upper clamping plate 32 to move along the second direction so that the upper clamping plate 32 can cooperate with the lower clamping plate 33 to clamp the cable located in the first receiving groove 331. The second direction is the height direction of the support mechanism 2, and the second direction is perpendicular to the first direction. The translation driving mechanism 4 is arranged on the frame 1, and is used to drive the two clamping mechanisms 3 to move closer to and away from each other along the first direction.

[0076] The present embodiment provides a centering device for connecting 35kV polyethylene-based non-cross-linked insulated power cables, wherein a support mechanism 2 is used to support a frame 1, and two clamping mechanisms 3 are arranged on the frame 1 to respectively clamp two sections of cables to be connected. Since the first receiving grooves 331 of the lower clamping plates 33 of the two clamping mechanisms 3 are coaxially arranged, the two sections of cables clamped in the two first receiving grooves 331 can maintain high coaxiality. In addition, the height of the supporting mechanism 2 is adjustable, and the translation driving mechanism 4 can drive the two clamping mechanisms 3 to move closer to and away from each other along the first direction, so that when the 35kV polyethylene non-cross-linked insulated power cable connection centering device in this embodiment is used to center and connect two sections of cables in a cable well or cable corridor, the height of the frame 1 and the supporting mechanism 2 thereon, and the distance between the two clamping mechanisms 3 can be adjusted according to the actual needs of the site environment to avoid interference between the frame 1 and the supporting mechanism 2 and the cable support poles, pipelines and other facilities in the site environment when the 35kV polyethylene non-cross-linked insulated power cable connection centering device is placed at the connection between the two sections of cables, thereby ensuring the smooth use of the 35kV polyethylene non-cross-linked insulated power cable connection centering device.

[0077] Alternatively, if Figure 1-Figure 4 As shown, the first driving assembly 31 includes a support frame 311, a first threaded rod 312 and a first hand wheel 313. The support frame 311 is fixedly arranged on the lower clamping plate 33. The first threaded rod 312 extends along the second direction, the bottom end of the first threaded rod 312 passes through the support frame 311 and extends in the direction close to the lower clamping plate 33, and the top end is exposed from the support frame 311. The first threaded rod 312 is threadedly connected to the support frame 311, and the upper clamping plate 32 is arranged at the bottom end of the first threaded rod 312 and is rotatably connected to the first threaded rod 312. The first hand wheel 313 is fixedly arranged at the top end of the first threaded rod 312 and is coaxially arranged with the first threaded rod 312. The first threaded rod 312 is driven to rotate relative to the support frame 311 by the first hand wheel 313. Since the first threaded rod 312 is threadedly connected to the support frame 311, the first threaded rod 312 will move relative to the support frame 311 along the second direction during this process, thereby driving the upper clamping plate 32 connected to the first threaded rod 312 to move along the second direction to approach and move away from the lower clamping plate 33, thereby clamping and loosening the cable on the lower clamping plate 33. In this embodiment, a second receiving groove 321 is provided on the side of the upper clamping plate 32 facing the lower clamping plate 33. The cross-sections of the second receiving groove 321 and the first receiving groove 331 perpendicular to the first direction are both arc-shaped. The second receiving groove 321 cooperates with the first receiving groove 331 to better accommodate the cable, so that the two sections of the cable are coaxial and all degrees of freedom are restricted to achieve a complete positioning effect, thereby avoiding eccentricity and displacement of the cable connector during installation, and ensuring the installation quality of the cable connector. Since the threaded connection is self-locking, the first screw rod will not move up and down when the first hand wheel 313 is not rotated.

[0078] Furthermore, if Figure 1-Figure 4 As shown, the support frame 311 includes a support plate 3111 and a support nut 3112. The support plate 3111 is covered on the lower deck and fixedly connected to the lower clamping plate 33 by bolts. The support nut 3112 is fixedly arranged on the top of the support plate 3111, and the first threaded rod 312 is threadedly connected to the support nut 3112.

[0079] Furthermore, if Figure 1-Figure 4 As shown, the first drive assembly 31 also includes a bearing seat 314, a first bearing 315 and a clamp seat 316. The bearing seat 314 is arranged at the bottom end of the first threaded rod 312. The first threaded rod 312 is rotatably connected to the bearing seat 314 through the first bearing 315. The clamp seat 316 is fixedly arranged at the bottom end of the bearing seat 314, and the upper clamp plate 32 is fixedly arranged at the bottom end of the clamp seat 316. The upper clamp plate 32 is rotatably connected to the first threaded rod 312 by the cooperation of the first bearing 315, the bearing seat 314 and the clamp seat 316. In this embodiment, the upper clamp plate 32 and the clamp seat 316, as well as the clamp seat 316 and the bearing seat 314 are connected by bolts. The outer ring of the first bearing 315 is fixed on the bearing seat 314, and the inner ring is interference fit with the first threaded tube. The upper clamping plate 32 and the clamping plate seat 316 are detachably connected, so the upper clamping plate 32 can be replaced very conveniently so that the upper clamping plate 32 can be suitable for cables of different specifications.

[0080] Alternatively, if Figure 1 and Figure 5 As shown, the translation drive mechanism 4 and the clamping mechanism 3 are arranged in a one-to-one correspondence, that is, the positions of the two clamping mechanisms 3 along the first direction can be adjusted separately, so that the centering device for connecting 35kV polyethylene-based non-cross-linked insulated power cables can better adjust the positions of the two clamping mechanisms 3 relative to the frame 1 according to the actual environment in the cable well or cable gallery.

[0081] Furthermore, if Figure 1 , Figure 2 and Figure 5 As shown, the translation drive mechanism 4 includes a sliding seat 41 and a second drive assembly 42. The sliding seat 41 is arranged on the frame 1 and can slide relative to the frame 1 along a first direction. The clamping mechanism 3 is arranged on the corresponding sliding seat 41 of the translation drive mechanism 4 and can move relative to the frame 1 along with the sliding seat 41. The second drive assembly 42 is arranged on the frame 1 and is used to drive the sliding seat 41 to move along the first direction, thereby driving the clamping mechanism 3 on the sliding seat 41 to move along the first direction.

[0082] Furthermore, if Figure 1 , Figure 2 and Figure 5As shown, the second driving assembly 42 includes a second threaded rod 421 and a second hand wheel 422. The second threaded rod 421 extends along the first direction and is threadedly connected to the frame 1. The first end of the second threaded rod 421 is rotatably connected to the sliding seat 41. Specifically, the frame 1 is provided with a second threaded hole extending along the first direction, and the second threaded rod 421 passes through the second threaded hole and is threadedly connected to the frame 1. The second hand wheel 422 is fixedly arranged at the second end of the second threaded rod 421 and is coaxially arranged with the second threaded rod 421. Since the threaded connection has self-locking properties, the second threaded rod 421 will not move along the first direction when the first hand wheel 313 is not rotated.

[0083] Furthermore, if Figure 5 As shown, the second driving assembly 42 further includes a second bearing 423, which is disposed on the sliding seat 41, and the second threaded rod 421 is rotatably connected to the sliding seat 41 through the second bearing 423. The outer ring of the second bearing 423 is fixed on the sliding seat 41, and the inner ring is interference fit with the second threaded rod 421.

[0084] Furthermore, if Figure 5 As shown, the translation drive mechanism 4 also includes a second fixing member 43, and a third threaded hole extending perpendicular to the first direction is provided on the frame 1, the third threaded hole is connected to the second threaded hole, and the second fixing member 43 is inserted into the third threaded hole and threadedly connected to the frame 1, and the second fixing member 43 is used to abut against the second threaded rod 421 to fix the second threaded rod 421. When there is no need to adjust the position of the clamping mechanism 3, the second threaded rod 421 is further fixed by the second fixing member 43 to prevent the second threaded rod 421 from moving along the first direction.

[0085] Alternatively, if Figure 5 As shown, the 35kV polyethylene-based non-cross-linked insulated power cable connection centering device provided in this embodiment further includes a guide assembly 5, which includes a guide rod 51 and a spring 52. The guide rod 51 extends along the first direction, and the sliding seat 41 is provided with a guide hole corresponding to the guide rod 51. The guide rod 51 is inserted into the corresponding guide hole to be slidably connected with the sliding seat 41. The spring 52 is provided in a one-to-one correspondence with the guide rod 51, and the spring 52 is sleeved on the corresponding guide rod 51 and clamped between the sliding seats 41 of the two translation drive mechanisms 4.

[0086] Furthermore, if Figure 5 As shown, two guide rods 51 are provided, and the two guide rods 51 are spaced apart along the third direction, and the third direction is the width direction of the frame 1. The frame 1 is provided with a middle partition 11, and the middle partition 11 is located between the two sliding seats 41. The two guide rods 51 both pass through the middle partition 11, and four springs 52 are provided. A spring 52 is provided at both ends of each guide rod 51, and the springs 52 are sandwiched between the sliding seat 41 and the middle partition 11.

[0087] Alternatively, if Figure 1 and Figure 6 As shown, two support mechanisms 2 are provided, and the two support mechanisms 2 are spaced apart along the first direction to better support the frame 1 and facilitate adjusting the heights of the two support mechanisms 2 respectively according to ground conditions.

[0088] Furthermore, if Figure 1-Figure 3 As shown, the support mechanism 2 includes a support rod 21, a support tube 22, a third driving assembly 23 and a plurality of legs 24. The support rod 21 extends along the second direction, and the top end is fixedly connected to the frame 1. The support tube 22 extends along the second direction, and the bottom end of the support rod 21 extends into the support tube 22. The third driving assembly 23 is arranged on the support tube 22 and connected to the support rod 21, and is used to drive the support rod 21 to move relative to the support tube 22 along the second direction. The third driving assembly 23 drives the support rod 21 to move along the second direction to adjust the height of the support mechanism 2. The top ends of the plurality of legs 24 are all fixedly connected to the bottom end of the support tube 22, and the plurality of legs 24 are sequentially arranged along the circumferential direction of the axis of the support tube 22, and the legs 24 and the support tube 22 are arranged at an angle, so that the plurality of legs 24 can support the support tube 22 more stably. In this embodiment, each support mechanism 2 is provided with three legs 24.

[0089] Furthermore, if Figure 1-Figure 3 As shown, the third driving assembly 23 includes a rotating sleeve 231 and a stopper 232. The rotating sleeve 231 is rotatably disposed at the top of the support tube 22 and is coaxially disposed with the support tube 22. The support rod 21 is provided with an external thread, and the rotating sleeve 231 is provided with an internal thread. The rotating sleeve 231 is threadedly connected with the support rod 21. The support rod 21 is provided with a strip groove 211 extending along the second direction, and the support tube 22 is provided with a first threaded hole. The stopper 232 is inserted into the first threaded hole and is threadedly connected with the support tube 22, and one end of the stopper 232 inserted into the support tube 22 extends into the strip groove 211. The stopper 232 is threadedly connected to the support tube 22 and extends into the strip groove 211 on the support rod 21, so that the support rod 21 can only move relative to the support tube 22 along the second direction, but cannot rotate relative to the support tube 22, so that the rotating sleeve 231 can be rotated relative to the support tube 22 by rotating the rotating sleeve 231. Since the rotating sleeve 231 is threadedly connected to the support rod 21, the rotation of the rotating sleeve 231 can be converted into the movement of the support rod 21 along the second direction. Since the threaded connection has a self-locking property, the support rod 21 will not move up and down when the rotating sleeve 231 is not rotated, and when there is no need to adjust the height of the support mechanism 2, the stopper 232 can be further tightened so that the stopper 232 is tightly against the support rod 21, the support rod 21 is locked, and the support rod 21 is prevented from moving up and down.

[0090] Furthermore, if Figure 1-Figure 3 As shown, the third driving assembly 23 further includes a third bearing 233, which is disposed at the top of the support cylinder 22, and the rotating sleeve 231 is rotatably connected to the support cylinder 22 through the third bearing 233. Specifically, the inner ring of the third bearing 233 is sleeved at the top of the support cylinder 22 and has an interference fit with the support cylinder 22, and the outer ring is disposed in the rotating sleeve 231 and has an interference fit with the rotating sleeve 231.

[0091] Furthermore, if Figure 1-Figure 3 As shown, the third driving assembly 23 also includes a handle 234, which is fixedly disposed on the rotating sleeve 231, so that the operator can drive the rotating sleeve 231 to rotate through the handle 234. In this embodiment, two handles 234 are spaced apart on each rotating sleeve 231.

[0092] For direct buried underground cables, the production environment of the cable joints is more complicated, the terrain is uneven and there are many pits, and ordinary cable centering brackets cannot ensure the levelness of the two sections of cables.

[0093] In order to solve the above problems, the centering device for connecting the 35kV polyethylene-based non-cross-linked insulated power cable in this embodiment has adjustable lengths of each leg 24, so that the support mechanism 2 can maintain the levelness of the frame 1 even when the terrain is uneven and there are pits on the ground by adjusting the length of each leg 24.

[0094] Furthermore, if Figure 1-Figure 3 As shown, the leg 24 includes a fixed cylinder 241, a movable section 242 and a first fixing member 243. The top of the fixed cylinder 241 is fixedly connected to the bottom of the support cylinder 22. The top of the movable section 242 is inserted into the bottom of the fixed cylinder 241, and the movable section 242 is coaxially arranged with the fixed cylinder 241. The movable section 242 can move relative to the fixed cylinder 241 along the axial direction of the fixed cylinder 241. The first fixing member 243 is connected to the fixed cylinder 241, and is used to fix the relative position between the movable section 242 and the fixed cylinder 241. The length adjustment of the leg 24 is achieved by the movement of the movable section 242 relative to the fixed cylinder 241, and the locking of the movable section 242 is achieved by the close contact of the first fixing member 243, that is, the relative position of the movable section 242 and the fixed cylinder 241 is fixed.

[0095] How to use the centering device for connecting 35kV polyethylene non-cross-linked insulated power cables:

[0096] When used in a cable well, due to the narrow space, the height of the frame 1 and the distance between the two clamping mechanisms 3 can be pre-adjusted according to the actual construction location. Then, the centering device for connecting the 35kV polyethylene-based non-cross-linked insulated power cable is placed at the construction location. The first hand wheel 313 is adjusted upward to drive the upper clamping plate 32 to move upward, so that the space between the upper clamping plate 32 and the lower clamping plate 33 becomes larger, so as to facilitate the cables at both ends to pass through between the upper clamping plate 32 and the lower clamping plate 33, and be temporarily placed on the lower clamping plate 33.

[0097] Then, according to the pit conditions of the support mechanism 2 on each side, the relative positions of the movable section 242 of the support leg 24 and the fixed tube 241 are adjusted until the two support tubes 22 remain vertical. According to the height difference of the support mechanisms 2 on both sides and the actual construction height in the cable well, the handles 234 of the two support mechanisms 2 are rotated respectively to move the support rods 21 on both sides up and down, thereby driving the two ends of the frame 1 to move up and down until the frame 1 is in a horizontal state. Finally, according to the outer diameter of the cable, the first hand wheel 313 is rotated to move the first threaded rod 312 up and down, thereby driving the upper clamping plate 32 to move up and down, reducing the distance between the upper clamping plate 32 and the lower clamping plate 33, and then compressing the cable. At this time, the two clamping mechanisms 3 can keep the cables at both ends with high coaxiality, can stably and effectively align the two sections of the cable, and improve the manufacturing quality of 35kV polyethylene-based non-cross-linked insulated power cable accessories.

[0098] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principles of the present invention. These improvements and substitutions should also be regarded as the scope of protection of the present invention.

Claims

1. A centering device for connecting 35kV polyethylene-based non-cross-linked insulated power cables, characterized in that: include: Framework (1); A support mechanism (2) is arranged below the frame (1) and is used to support the frame (1); the height of the support mechanism (2) is adjustable; Two clamping mechanisms (3), the clamping mechanisms (3) being arranged above the frame (1), the two clamping mechanisms (3) being arranged at intervals along a first direction, the first direction being the length direction of the frame (1), the clamping mechanism (3) comprising a first driving assembly (31), an upper clamping plate (32) and a lower clamping plate (33), the upper clamping plate (32) being arranged above the lower clamping plate (33), the lower clamping plate (33) being provided with a first receiving groove (331) for receiving a cable, the first receiving grooves (331) of the two clamping mechanisms (3) being arranged coaxially, the first driving assembly (31) being used to drive the upper clamping plate (32) to move along a second direction so that the upper clamping plate (32) can cooperate with the lower clamping plate (33) to clamp the cable located in the first receiving groove (331), the second direction being the height direction of the support mechanism (2), the second direction being perpendicular to the first direction; A translation driving mechanism (4) is arranged on the frame (1) and is used to drive the two clamping mechanisms (3) to move closer to and farther from each other along the first direction.

2. The centering device for connecting 35kV polyethylene-based non-cross-linked insulated power cables according to claim 1 is characterized in that: The first driving assembly (31) comprises: A support frame (311) fixedly mounted on the lower clamping plate (33); A first threaded rod (312) extending along the second direction, the bottom end of the first threaded rod (312) passing through the support frame (311) and extending in a direction close to the lower clamping plate (33), and the top end of the first threaded rod (312) is exposed from the support frame (311), the first threaded rod (312) is threadedly connected to the support frame (311), and the upper clamping plate (32) is arranged at the bottom end of the first threaded rod (312) and is rotatably connected to the first threaded rod (312); A first hand wheel (313) is fixedly disposed on the top end of the first threaded rod (312).

3. The centering device for connecting 35kV polyethylene-based non-cross-linked insulated power cables according to claim 2 is characterized in that: The first driving assembly (31) further comprises: A bearing seat (314) disposed at the bottom end of the first threaded rod (312); a first bearing (315), wherein the first threaded rod (312) is rotatably connected to the bearing seat (314) via the first bearing (315); The clamping plate seat (316) is fixedly arranged at the bottom end of the bearing seat (314), and the upper clamping plate (32) is fixedly arranged at the bottom end of the clamping plate seat (316).

4. The centering device for connecting 35kV polyethylene-based non-cross-linked insulated power cables according to claim 1 is characterized in that: The translation drive mechanism (4) is arranged in one-to-one correspondence with the clamping mechanism (3), and the translation drive mechanism (4) comprises: a sliding seat (41) which is arranged on the frame (1) and is capable of sliding relative to the frame (1) along the first direction; the clamping mechanism (3) is arranged on the sliding seat (41) of the corresponding translation drive mechanism (4) and is capable of moving relative to the frame (1) along with the sliding seat (41); A second driving assembly (42) is arranged on the frame (1) and is used to drive the sliding seat (41) to move along the first direction.

5. The centering device for connecting 35kV polyethylene-based non-cross-linked insulated power cables according to claim 4 is characterized in that: The second drive assembly (42) comprises: a second threaded rod (421), which extends along the first direction and is threadedly connected to the frame (1); a first end of the second threaded rod (421) is rotatably connected to the sliding seat (41); The second hand wheel (422) is fixedly disposed on the second end of the second threaded rod (421).

6. The centering device for connecting 35kV polyethylene-based non-cross-linked insulated power cables according to claim 4, characterized in that: It also includes a guide assembly (5), wherein the guide assembly (5) includes: A guide rod (51) extending along the first direction, the sliding seat (41) being provided with guide holes corresponding to the guide rods (51) one by one, the guide rods (51) being inserted into the corresponding guide holes to be slidably connected with the sliding seat (41); A spring (52) is sleeved on each of the guide rods (51), and the spring (52) is arranged between the sliding seats (41) of the two translation drive mechanisms (4).

7. The centering device for connecting 35kV polyethylene-based non-cross-linked insulated power cables according to claim 1, characterized in that: Two support mechanisms (2) are provided, and the two support mechanisms (2) are arranged at intervals along the first direction. The support mechanism (2) comprises: A support rod (21), which extends along the second direction and has a top end fixedly connected to the frame (1); A support tube (22) extending along the second direction, wherein the bottom end of the support rod (21) extends into the support tube (22); a third driving assembly (23), which is disposed on the support tube (22) and connected to the support rod (21), and is used to drive the support rod (21) to move relative to the support tube (22) along the second direction; A plurality of supporting legs (24), the top ends of the plurality of supporting legs (24) are fixedly connected to the bottom end of the supporting tube (22), the plurality of supporting legs (24) are sequentially arranged along the circumferential direction of the axis of the supporting tube (22), and the supporting legs (24) and the supporting tube (22) are arranged at an angle.

8. The centering device for connecting 35kV polyethylene-based non-cross-linked insulated power cables according to claim 7, characterized in that: The third driving assembly (23) comprises: a rotating sleeve (231) which is rotatably arranged at the top end of the support tube (22) and is coaxially arranged with the support tube (22); the support rod (21) is provided with an external thread, the rotating sleeve (231) is provided with an internal thread, and the rotating sleeve (231) is threadedly connected with the support rod (21); A limiting member (232), wherein the support rod (21) is provided with a strip groove (211) extending along the second direction, and the support tube (22) is provided with a first threaded hole, and the limiting member (232) is inserted into the first threaded hole and is threadedly connected to the support tube (22), and one end of the limiting member (232) inserted into the support tube (22) extends into the strip groove (211).

9. The centering device for connecting 35kV polyethylene-based non-cross-linked insulated power cables according to claim 7, characterized in that: The length of each of the legs (24) is adjustable.

10. The centering device for connecting 35kV polyethylene-based non-cross-linked insulated power cables according to claim 9, characterized in that: The supporting leg (24) comprises: A fixed tube (241), the top end of which is fixedly connected to the bottom end of the support tube (22); A movable section (242), the top end of which is inserted into the bottom end of the fixed tube (241), the movable section (242) and the fixed tube (241) are coaxially arranged, and the movable section (242) can move relative to the fixed tube (241) along the axial direction of the fixed tube (241); A first fixing member (243) is connected to the fixing tube (241) and is used to fix the relative position between the movable section (242) and the fixing tube (241).

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