Anti-rotation device of power cable

Abstract

The utility model discloses an anti-rotation device for a power cable, which comprises a box body, and a joint and a rotating block which are arranged on the box body, a cable is inserted and mounted in the joint, a fixed block is welded on a back plate of the box body, a welding rod is welded on a side plate of the box body, a first clamping ring is arranged on the welding rod, and a second clamping ring is arranged on the first clamping ring. A first screw hole and a second screw hole are formed in the rotating block, a first screw is in threaded connection with the interior of the first screw hole, a second screw is in threaded connection with the second screw hole, a second clamping ring is arranged on the first screw, a third clamping ring is arranged on the second screw, a connecting disc is arranged on the outer wall face of the rotating block, and an annular clamping block is arranged on the outer wall face of the connecting disc. And the annular clamping block is rotationally clamped with the fixed block. Therefore, the anti-rotation effect of the cable is improved, and the stability of connection and contact between the cable penetrating into the box body and a power supply row plug in the box body is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of power cable installation, in particular to an anti-rotation device for a power cable. Background Art

[0002] Power cables are cables used to transmit and distribute electrical energy. Power cables are commonly used in urban underground power grids, power station lead-out lines, internal power supply for industrial and mining enterprises, and underwater transmission lines across rivers and seas.

[0003] In the power equipment box, a cable connector is generally pre-installed on the box, and then the power cable passes through the cable connector and is connected to the corresponding power strip connector in the power equipment box, and the exiting power cable is externally connected to the corresponding power-demanding equipment.

[0004] However, since the connecting line segment between the power cable inserted into the box and the box power strip connector is short, the power cable is prone to rotation in the jack of the cable connector after it is installed, which will cause unstable contact between the power cable inserted into the box and the box power strip connector. Utility Model Content

[0005] The utility model aims to provide an anti-rotation device for a power cable, so as to solve the problem that the anti-rotation effect of the cable in the prior art is low.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an anti-rotation device for a power cable, comprising a box body, a joint and a rotating block arranged on the box body, a cable being inserted and installed in the joint, the joint being a commonly used stainless steel joint for threading power cables in a power distribution box, and the cable being a commonly used power cable, a fixed block being welded on the back plate of the box body, a welding rod being welded on the side plate of the box body, a first clamping ring being arranged on the welding rod, a first screw hole and a second screw hole being arranged on the rotating block, the rotating block being a cylindrical structure as a whole, a first screw being threadedly connected to the first screw hole, a second screw being threadedly connected to the second screw hole, a second clamping ring being arranged on the first screw, and a third clamping ring being arranged on the second screw, a connecting disk being arranged on the outer wall surface of the rotating block, the connecting disk being a flat cylindrical disk structure, an annular clamping block being arranged on the outer wall surface of the connecting disk, and the annular clamping block being rotatably clamped with the fixed block.

[0007] Preferably, an annular groove is provided on the fixed block, the connecting disk is inserted into the annular groove and is rotatably connected with the annular groove through the annular block, and the inner groove cross-section of the annular groove is a stepped structure, which ensures that the annular block rotates in the annular groove while not slipping out of the annular groove, thereby ensuring the stability of the rotating block and avoiding the rotating block from shifting left and right or up and down. The top view cross-sections of the connecting disk and the annular block are both circular structures.

[0008] Preferably, the top-view cross-sections of the first clamp ring, the second clamp ring, and the third clamp ring are all semi-arc structures that match the outer wall of the cable. The matching semi-arc structure clamp rings can ensure stable clamping of the cable, thereby ensuring the anti-rotation and anti-slip effect of the cable.

[0009] Preferably, the inner wall surfaces of the first clamp ring, the second clamp ring and the third clamp ring are all provided with an elastic anti-skid layer, and the elastic anti-skid layer is made of a silicone rubber pad as a whole, has excellent buffering and anti-skid properties, and can greatly improve the anti-rotation and anti-skid effect of the cable through the extrusion force.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] By arranging a symmetrical twin-screw transmission structure in the box body and a symmetrical clamping and pressing structure, and arranging an elastic anti-skid layer structure on the inner wall surface of each clamping ring, the outer walls of two adjacent cables can be stably clamped and pressed by the elastic anti-skid layer at the same time, thereby effectively improving the anti-rotation effect of the cable, thereby ensuring the stability of the connection between the cable inserted into the box body and the power strip connector inside the box body. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a top view of the anti-rotation structure of the cable in the box body of the utility model;

[0013] Figure 2 It is a partial enlarged view of the symmetrical twin-screw transmission structure and the clamping and pressing structure of the clamping ring of the utility model;

[0014] Figure 3 It is a side view structural diagram of the elastic anti-skid layer of the utility model;

[0015] Figure 4 It is a top view of the connection disk of the utility model.

[0016] In the figure: 1 box body, 2 back plate, 21 welding rod, 22 first clamping ring, 3 joint, 31 cable, 4 second clamping ring, 5 fixing block, 51 annular groove, 6 rotating block, 7 first screw rod, 71 first screw hole, 8 second screw, 81 second screw hole, 9 third clamping ring, 10 elastic anti-skid layer, 11 connecting plate, 12 annular clamping block. DETAILED DESCRIPTION

[0017] See also Figure 1 , Figure 2 , an anti-rotation device for a power cable, comprising a box body 1, the box body 1 is a commonly used power distribution box, and a connector 3 and a rotating block 6 arranged on the box body 1, a cable 31 is installed in the connector 3, the connector 3 is a commonly used stainless steel connector for threading power cables in a power distribution box, the cable 31 is a commonly used power cable, three connectors 3 are pre-installed at the right end of the box body 1, cables 31 of the same specification are inserted into each connector 3, and the outer diameters of the cables 31 are the same.

[0018] See also Figure 1 , Figure 2 , Figure 3 A fixing block 5 is welded on the back plate 2 of the box body 1, a welding rod 21 is welded on the side plate of the box body 1, a first clamping ring 22 is welded on the welding rod 21, a first screw hole 71 and a second screw hole 81 are provided on the rotating block 6, the first screw hole 71 is threadedly connected to the first screw rod 7, the second screw hole 81 is threadedly connected to the second screw rod 8, a second clamping ring 4 is welded on the first screw 7, and a third clamping ring 9 is welded on the second screw 8. The top cross-sections of the first clamping ring 22, the second clamping ring 4, and the third clamping ring 9 are all semi-arc structures that match the outer wall surface of the cable 31. The relevant metal material components in the present invention are all made of No. 45 steel, which has high strength, is easy to weld, easy to process, wear-resistant, and has a long service life.

[0019] See also Figure 1 , Figure 2 , Figure 4 A connecting plate 11 is welded on the outer wall of the rotating block 6, and an annular clamping block 12 is welded on the outer wall of the connecting plate 11. The annular clamping block 12 is rotatably connected with the fixed block 5. The fixed block 5 is provided with an annular clamping groove 51. The inner groove section of the annular clamping groove 51 is a stepped structure. The top view cross-sections of the connecting plate 11 and the annular clamping block 12 are both circular structures. The connecting plate 11 penetrates the annular clamping groove 51 and is rotatably connected with the annular clamping groove 51 through the annular clamping block 12. Figure 2 It can be seen that the cross-section of the connection position between the connecting disk 11 and the annular clamping block 12 is a stepped structure, which is just rotatably engaged with the annular clamping groove 51 with a stepped inner groove cross-section, while ensuring that the annular clamping block 12 rotates in the annular clamping groove 51 and will not slip out of the annular clamping groove 51, thereby ensuring the stability of the rotating block 6 and preventing the rotating block 6 from deviating left and right or up and down.

[0020] See also Figure 1 , Figure 3The inner wall surfaces of the first clamping ring 22, the second clamping ring 4, and the third clamping ring 9 are all stably bonded with an elastic anti-skid layer 10 through resin glue. The elastic anti-skid layer 10 is made of a silicone rubber pad as a whole, has excellent buffering and anti-skid properties, and can greatly improve the anti-rotation and anti-skid effect of the cable 31 through the extrusion force.

[0021] The working principle of this scheme is: first pass each cable 31 through the connector 3, and then connect the left end of each cable 31 to the pre-set power strip connector in the box body 1. After completion, rotate the locking connector 3, then hold the rotating block 6 by hand and rotate it counterclockwise, driving the connecting plate 11 and the annular clamping block 12 to rotate counterclockwise. At this time, the annular clamping block 12 will rotate along the annular clamping groove 51 in the fixed block 5, and the clamping effect of the stepped groove annular clamping groove 51 and the annular clamping block 12 can prevent the rotating block 6 from being displaced left and right, thereby ensuring stability;

[0022] At this time, due to the counterclockwise rotation of the rotating block 6, the first screw hole 71 and the second screw hole 81 will be driven to rotate counterclockwise, and through the thread transmission effect, the first screw rod 7 and the second screw rod 8 on the upper and lower sides are driven to move in opposite directions away from each other, and the second clamping ring 4 and the third clamping ring 9 on the upper and lower sides are driven to move in opposite directions away from each other, and the second clamping ring 4 will stably clamp and press the outer wall surface of the lowermost cable 31 through the clamping cooperation with the first clamping ring 22. Similarly, the upper third clamping ring 9 will also stably clamp and press the outer wall surface of the upper second cable at the same time with another clamping ring symmetrical at the upper end, and at this time, the elastic anti-skid layer 10 on the inner wall surface of each clamping ring will fit tightly with the outer wall surface of the cable 31. The elastic anti-skid layer 10 has excellent buffering and anti-skid properties, which greatly improves the anti-rotation effect of the cable 31, thereby ensuring the stability of the connection between the cable 31 inserted into the box body 1 and the power strip connector inside the box body 1.

Claims

1. An anti-rotation device for a power cable, comprising a box body (1), a connector (3) and a rotating block (6) arranged on the box body (1), characterized in that: A cable (31) is inserted and installed in the joint (3); a fixed block (5) is welded on the back plate (2) of the box body (1); a welding rod (21) is welded on the side plate of the box body (1); a first clamping ring (22) is arranged on the welding rod (21); a first screw hole (71) and a second screw hole (81) are arranged on the rotating block (6); a first screw rod (7) is threadedly connected to the first screw hole (71); a second screw rod (8) is threadedly connected to the second screw hole (81); a second clamping ring (4) is arranged on the first screw rod (7); a third clamping ring (9) is arranged on the second screw rod (8); a connecting disk (11) is arranged on the outer wall surface of the rotating block (6); an annular clamping block (12) is arranged on the outer wall surface of the connecting disk (11); and the annular clamping block (12) is rotatably clamped with the fixed block (5).

2. The anti-rotation device for a power cable according to claim 1, characterized in that: The fixing block (5) is provided with an annular clamping groove (51), and the connecting disk (11) penetrates into the annular clamping groove (51) and is rotatably clamped with the annular clamping groove (51) through the annular clamping block (12).

3. The anti-rotation device for a power cable according to claim 2, characterized in that: The inner groove cross section of the annular clamping groove (51) is a stepped structure.

4. The anti-rotation device for a power cable according to claim 1, characterized in that: The connecting disk (11) and the annular clamping block (12) are both circular structures in top view cross-section.

5. The anti-rotation device for a power cable according to claim 1, characterized in that: The top-view cross-sections of the first clamping ring (22), the second clamping ring (4), and the third clamping ring (9) are all semi-arc structures that match the outer wall surface of the cable (31).

6. The anti-rotation device for a power cable according to claim 1, characterized in that: The inner wall surfaces of the first clamping ring (22), the second clamping ring (4) and the third clamping ring (9) are all provided with an elastic anti-slip layer (10).

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