A centering device for 35 kV polyethylene non-crosslinked insulating power cable connections

Abstract

The present application relates to the technical field of power equipment, and discloses a centering device for 35kV polyethylene non-crosslinked insulation 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 is used for supporting the frame, and the height of the supporting mechanism is adjustable. The clamping mechanism is arranged above the frame, 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 accommodating groove for accommodating the cable, the first accommodating grooves of the two clamping mechanisms are coaxially arranged, the first driving assembly is used for driving 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 in the first accommodating groove, the second direction is the height direction of the supporting mechanism, and the second direction is perpendicular to the first direction. The translation driving mechanism is arranged on the frame.

Description

Technical Field

[0001] The present 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 beauty 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 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 through manual control. Due to certain limitations of this method, the coaxiality deviation of the cables at both ends is relatively large. When making cable joints, the cable conductors need to be connected. The connection methods generally include crimping, welding and fusion. If there is no device to control the coaxiality at this time, it is easy to cause eccentricity, bending and misalignment 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 directly buried underground cables and cables in cable corridors, the joint production environment is more complicated. Due to the small space in the cable well and cable corridor, and the presence of cable support rods and other facilities such as pipelines, ordinary cable centering brackets are difficult to use 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 maintain high coaxiality between two sections of cables and is easy to 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 spaced apart along a first direction, the first direction is the length direction of the frame, the clamping mechanism includes 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 accommodating groove for accommodating the cable, the first accommodating 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 accommodating groove, the second direction is the height direction of the support mechanism, and the second direction is perpendicular to the first direction;

[0011] A translation driving mechanism is provided 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, with a bottom end of the first threaded rod passing through the support frame and extending toward the lower clamping plate, and a top end exposed from the support frame, the first threaded rod being threadedly connected to the support frame, and the upper clamping plate being disposed at the bottom end of the first threaded rod and 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 drive assembly 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 to the above technical solution, the translation drive mechanism and the clamping mechanism are provided in a one-to-one correspondence, and the translation drive mechanism includes:

[0021] a sliding seat disposed on the frame and capable of sliding relative to the frame along the first direction; the clamping mechanism is disposed on the sliding seat of the corresponding translation drive mechanism and capable of moving relative to the frame along with the sliding seat;

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

[0023] As an improvement of the above technical solution, the second drive assembly includes:

[0024] a second threaded rod extending along the first direction and being 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 arranged 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 to the sliding seat;

[0028] Spring, the guide rods are all sleeved with the spring, and the spring is arranged between the sliding seats of the two translation drive mechanisms.

[0029] As an improvement to the above technical solution, two support mechanisms are provided, and the two support mechanisms are spaced apart along the first direction. The support mechanisms include:

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

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

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

[0033] Multiple legs, the top ends of the multiple legs are fixedly connected to the bottom end of the support tube, the multiple legs are arranged in sequence 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 drive assembly includes:

[0035] A rotating sleeve 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, and the rotating sleeve is provided with an internal thread. The rotating sleeve is threadedly connected to the support rod;

[0036] A limiting member, wherein the support rod is provided with a strip groove extending along the second direction, and 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 to 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 supporting cylinder;

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

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

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

[0043] The centering device for connecting 35kV polyethylene 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 move closer to and away from each other along the first direction, so that when the centering device for connecting 35kV polyethylene non-cross-linked insulated power cables of the present invention performs centering connection of two sections of cables in a cable well or cable duct, 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 to avoid interference between the frame and the support mechanism and facilities such as cable support rods and pipelines in the on-site environment when the centering device for connecting 35kV polyethylene 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 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 2This is a side view of a centering device for connecting a 35kV polyethylene-based non-cross-linked insulated power cable provided by an embodiment of the present invention (part of which is a cross-sectional view);

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

[0047] Figure 4 This is a schematic diagram of the structure of a centralizing device for connecting a 35kV polyethylene non-cross-linked insulated power cable provided by an embodiment of the present invention. Figure 2 ;

[0048] Figure 5 This is a schematic diagram of the structure of a centering device for connecting power cables provided by an embodiment of the present invention. Figure 3 ;

[0049] Figure 6 This is a schematic diagram of a 35kV polyethylene 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 picture:

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

[0052] 2. Support mechanism;

[0053] 21. Support rod; 211. Strip groove;

[0054] 22. Support tube;

[0055] 23. Third drive assembly;

[0056] 231. Rotating sleeve; 232. Positioning 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. 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 splint; 321. Second receiving slot;

[0064] 33. Lower splint; 331. First receiving groove;

[0065] 4. Translation drive mechanism;

[0066] 41. Sliding seat;

[0067] 42. Second drive assembly;

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

[0069] 5. Guide assembly; 51. Guide rod; 52. Spring. DETAILED DESCRIPTION

[0070] The following embodiments of the present invention are described in further detail with reference to 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.

[0071] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0072] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0073] In the description of this embodiment, terms such as "upper," "lower," and "right" are used to refer to positions or locations based on the positions or locations shown in the accompanying drawings. These terms are intended solely to facilitate description and simplify operation, and are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0074] like Figures 1-6 As shown, a centering device for connecting 35kV polyethylene non-cross-linked insulated power cables according to an embodiment of the present invention is used for coaxial centering during the fabrication of 35kV polyethylene non-cross-linked insulated power cable joints. The device comprises a frame 1, a support mechanism 2, a translation drive mechanism 4, and two clamping mechanisms 3. The support mechanism 2 is disposed below the frame 1 to support the frame 1, and the height of the support mechanism 2 is adjustable. The clamping mechanism 3 is disposed above the frame 1. The two clamping mechanisms 3 are spaced apart along a first direction, which is the length of the frame 1. The clamping mechanism 3 includes a first drive assembly 31, an upper clamping plate 32, and a lower clamping plate 33. The upper clamping plate 32 is disposed above the lower clamping plate 33. The lower clamping plate 33 is provided with a first receiving groove 331 for accommodating a cable. The first receiving grooves 331 of the two clamping mechanisms 3 are coaxially arranged. The first drive assembly 31 is used to drive the upper clamping plate 32 to move along a second direction, which is the height direction of the support mechanism 2 and is perpendicular to the first 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 perpendicular to the first direction. A translation drive mechanism 4 is disposed on the frame 1 and is used to drive the two clamping mechanisms 3 toward and away from each other along the first direction.

[0075] The centering device for connecting 35kV polyethylene-based non-cross-linked insulated power cables provided in this embodiment has a support mechanism 2 for supporting a frame 1, and two clamping mechanisms 3 are arranged on the frame 1 for respectively clamping 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 support mechanism 2 is adjustable, and the translation drive 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 two sections of cables in a cable well or cable corridor, the height of the frame 1 and the support 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 support mechanism 2 and the cable support poles and 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.

[0076] Alternatively, as Figures 1-4As shown, the first driving assembly 31 comprises 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 extends towards the lower clamping plate 33 through the support frame 311, the top end of the first threaded rod 312 is exposed to the support frame 311, the first threaded rod 312 is threadedly connected with the support frame 311, the upper clamping plate 32 is arranged at the bottom end of the first threaded rod 312 and is rotationally connected with 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 hand wheel 313 drives the first threaded rod 312 to rotate relative to the support frame 311, and since the first threaded rod 312 is threadedly connected with the support frame 311, the first threaded rod 312 will move relative to the support frame 311 along the second direction during the process, thereby driving the upper clamping plate 32 rotationally connected with the first threaded rod 312 to move along the second direction to approach and move away from the lower clamping plate 33, so as to realize clamping and loosening of the cable on the lower clamping plate 33. In the embodiment, the side of the upper clamping plate 32 facing the lower clamping plate 33 is provided with a second accommodating groove 321, the cross section of the second accommodating groove 321 and the first accommodating groove 331 perpendicular to the first direction is arc-shaped, and the second accommodating groove 321 cooperates with the first accommodating groove 331 to better accommodate the cable, so that the two sections of the cable are coaxial and all degrees of freedom are limited to achieve complete positioning effect, so as to avoid eccentricity and displacement of the cable joint during installation and ensure the installation quality of the cable joint. Since the threaded connection has self-locking property, the first threaded rod will not move up and down when the first hand wheel 313 is not rotated.

[0077] Further, as shown in Figures 1-4 The support frame 311 comprises a support plate 3111 and a support nut 3112, the support plate 3111 is covered on the lower clamping plate 33 and is fixedly connected with the lower clamping plate 33 through bolts, and the support nut 3112 is fixedly arranged at the top end of the support plate 3111, and the first threaded rod 312 is threadedly connected with the support nut 3112.

[0078] Further, as shown in Figures 1-4As shown, the first drive assembly 31 also includes a bearing seat 314, a first bearing 315 and a clamping plate 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 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. The rotational connection between the upper clamping plate 32 and the first threaded rod 312 is achieved by the cooperation of the first bearing 315, the bearing seat 314 and the clamping plate seat 316. In this embodiment, the upper clamping plate 32 and the clamping plate seat 316, as well as the clamping plate 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 easily replaced so that the upper clamping plate 32 can be adapted to cables of different specifications.

[0079] Alternatively, as 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 corridor.

[0080] Further, 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 disposed on the frame 1 and is capable of sliding relative to the frame 1 in a first direction. The clamping mechanism 3 is disposed on the corresponding sliding seat 41 of the translation drive mechanism 4 and is capable of moving relative to the frame 1 along with the sliding seat 41. The second drive assembly 42 is disposed on the frame 1 and is configured to drive the sliding seat 41 to move in the first direction, thereby driving the clamping mechanism 3 on the sliding seat 41 to move in the first direction.

[0081] Further, if Figure 1 、 Figure 2 and Figure 5As shown, the second drive assembly 42 includes a second threaded rod 421 and a second handwheel 422. The second threaded rod 421 extends in 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 in the first direction, through which the second threaded rod 421 passes and is threadedly connected to the frame 1. The second handwheel 422 is fixedly mounted at the second end of the second threaded rod 421 and is coaxially arranged with the second threaded rod 421. Because the threaded connection is self-locking, the second threaded rod 421 will not move in the first direction unless the first handwheel 313 is rotated.

[0082] Further, if Figure 5 As shown, the second drive assembly 42 further includes a second bearing 423, which is disposed on the sliding seat 41. The second threaded rod 421 is rotatably connected to the sliding seat 41 via the second bearing 423. The outer ring of the second bearing 423 is fixed to the sliding seat 41, and the inner ring is interference fit with the second threaded rod 421.

[0083] Further, if Figure 5 As shown, the translation drive mechanism 4 also includes a second fixing member, 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 is inserted into the third threaded hole and threadedly connected to the frame 1. The second fixing member 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 to prevent the second threaded rod 421 from moving along the first direction.

[0084] Alternatively, as Figure 5 As shown, the centering device for connecting 35kV polyethylene-based non-cross-linked insulated power cables 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 a first direction. The sliding seat 41 is provided with guide holes corresponding to the guide rods 51. The guide rods 51 are inserted into the corresponding guide holes to slide in connection with the sliding seat 41. The spring 52 is provided in a one-to-one correspondence with the guide rods 51. The spring 52 is mounted on the corresponding guide rod 51 and is clamped between the sliding seats 41 of the two translation drive mechanisms 4.

[0085] Further, if Figure 5 As shown, two guide rods 51 are provided, spaced apart along a third direction, which corresponds to the width of the frame 1. A middle partition 11 is provided on the frame 1, located between the two sliding seats 41. Both guide rods 51 pass through the middle partition 11. Four springs 52 are provided, one at each end of each guide rod 51, and each spring 52 is sandwiched between the sliding seat 41 and the middle partition 11.

[0086] Alternatively, as 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 according to ground conditions.

[0087] Further, if Figure 1-Figure 3 As shown, the support mechanism 2 includes a support rod 21, a support tube 22, a third drive 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 drive assembly 23 is provided on the support tube 22 and is 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 drive assembly 23 drives the support rod 21 to move along the second direction to achieve the height adjustment 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 arranged in sequence along the circumferential direction of the axis of the support tube 22, and the legs 24 are all arranged at an angle to the support tube 22. 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.

[0088] Further, if Figure 1-Figure 3 As shown, the third drive assembly 23 includes a rotating sleeve 231 and a stopper 232. The rotating sleeve 231 is rotatably mounted on the top of the support tube 22 and is coaxial 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 to the support rod 21. The support rod 21 is provided with a strip groove 211 extending along the second direction. 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 to the support tube 22. The stopper 232 is inserted into the support tube 22 and extends into the strip groove 211 at one end. The limiting member 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. Therefore, 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 movement of the support rod 21 along the second direction. Since the threaded connection is self-locking, the support rod 21 will not move up and down when the rotating sleeve 231 is not rotated. When there is no need to adjust the height of the support mechanism 2, the limiting member 232 can be further tightened so that the limiting member 232 is tightly against the support rod 21, locking the support rod 21 and preventing the support rod 21 from moving up and down.

[0089] Further, if Figure 1-Figure 3As shown, the third drive assembly 23 further includes a third bearing 233, which is disposed at the top of the support cylinder 22. The rotating sleeve 231 is rotatably connected to the support cylinder 22 via the third bearing 233. Specifically, the inner ring of the third bearing 233 is sleeved on the top of the support cylinder 22 and has an interference fit with the support cylinder 22, while the outer ring is disposed within the rotating sleeve 231 and has an interference fit with the rotating sleeve 231.

[0090] Further, if Figure 1-Figure 3 As shown, the third driving assembly 23 further 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 .

[0091] For direct buried underground cables, the production environment of cable joints is more complicated, the terrain is uneven and there are many pits. Ordinary cable centering brackets cannot ensure the levelness of the two sections of cable.

[0092] To solve the above problems, the centering device for connecting 35kV polyethylene-based non-cross-linked insulated power cables 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.

[0093] Further, if Figure 1-Figure 3 As shown, the support leg 24 includes a fixed cylinder 241, a movable section 242 and a first fixing member 243. The top end of the fixed cylinder 241 is fixedly connected to the bottom end of the support cylinder 22. The top end of the movable section 242 is inserted into the bottom end of the fixed cylinder 241. The movable section 242 and the fixed cylinder 241 are coaxially arranged, and 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 support 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.

[0094] How to use the centering device for connecting 35kV polyethylene non-cross-linked insulated power cables:

[0095] When used in a cable well, due to its 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, and 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.

[0096] Then, according to the condition of the pit at the position of the support mechanism 2 on each side, the relative position of the movable section 242 of the support leg 24 and the fixed tube 241 is adjusted until the two support tubes 22 remain vertical. According to the height difference between 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 horizontal. 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 highly coaxial, can stably and effectively align the two sections of cable, and improve the manufacturing quality of 35kV polyethylene-based non-cross-linked insulated power cable accessories.

[0097] 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: Frame (1); A support mechanism (2) is provided below the frame (1) and is used to support the frame (1), wherein the height of the support mechanism (2) is adjustable; Two clamping mechanisms (3), the clamping mechanisms (3) are arranged above the frame (1), the two clamping mechanisms (3) are spaced apart 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 coaxially arranged, 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 drive mechanism (4) disposed on the frame (1) and used to drive the two clamping mechanisms (3) to move closer to and farther from each other along the first direction; the translation drive mechanism (4) and the clamping mechanism (3) are disposed in a one-to-one correspondence, and the positions of the two clamping mechanisms (3) along the first direction can be adjusted separately; Two support mechanisms (2) are provided, and the two support mechanisms (2) are spaced apart along the first direction. The support mechanism (2) comprises: A support rod (21) extending along the second direction, with 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 cylinder (22) and connected to the support rod (21), and is used to drive the support rod (21) to move relative to the support cylinder (22) along the second direction; A plurality of legs (24), the top ends of the plurality of legs (24) are fixedly connected to the bottom end of the support tube (22), 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; The length of each of the legs (24) is adjustable; The support leg (24) comprises: A fixed cylinder (241), the top end of which is fixedly connected to the bottom end of the support cylinder (22); a movable section (242), the top end of which is inserted into the bottom end of the fixed cylinder (241); the movable section (242) and the fixed cylinder (241) are coaxially arranged; and the movable section (242) is movable relative to the fixed cylinder (241) along the axial direction of the fixed cylinder (241); A first fixing member (243) is connected to the fixing cylinder (241) and is used to fix the relative position between the movable section (242) and the fixing cylinder (241).

2. The centering device for connecting 35kV polyethylene non-cross-linked insulated power cables according to claim 1, 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 toward the lower clamping plate (33), with the top end exposed from the support frame (311), the first threaded rod (312) being threadedly connected to the support frame (311), and the upper clamping plate (32) being disposed at the bottom end of the first threaded rod (312) and being rotatably connected to the first threaded rod (312); A first hand wheel (313) is fixedly arranged on the top end of the first threaded rod (312).

3. The centering device for connecting 35kV polyethylene non-cross-linked insulated power cables according to claim 2, characterized in that: The first drive assembly (31) further comprises: A bearing seat (314) is provided 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 non-cross-linked insulated power cables according to claim 1, characterized in that: The translation drive mechanism (4) comprises: a sliding seat (41) disposed on the frame (1) and capable of sliding relative to the frame (1) along the first direction; the clamping mechanism (3) is disposed on the sliding seat (41) of the corresponding translation drive mechanism (4) and capable of moving relative to the frame (1) along with the sliding seat (41); A second driving assembly (42) is provided 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 non-cross-linked insulated power cables according to claim 4, characterized in that: The second drive assembly (42) comprises: a second threaded rod (421) extending along the first direction and being threadedly connected to the frame (1); a first end of the second threaded rod (421) being rotatably connected to the sliding seat (41); A 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 non-cross-linked insulated power cables according to claim 4, characterized in that: It also includes a guide assembly (5), which includes: A guide rod (51) extending along the first direction, the sliding seat (41) being provided with a guide hole corresponding to the guide rod (51), the guide rod (51) being inserted into the corresponding guide hole to be slidably connected to 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 non-cross-linked insulated power cables according to claim 1, characterized in that: The third drive assembly (23) comprises: a rotating sleeve (231) rotatably arranged at the top end of the support tube (22) and 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 to the support rod (21); A limiting member (232) is provided on the support rod (21), and a strip groove (211) extending along the second direction is provided on the support tube (22), and a first threaded hole is provided on the support tube (22), 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).

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