Strain clamp

Abstract

The utility model discloses a strain clamp, comprising a housing, two ends of which are communicated to form a sliding channel; the number of the cable clamping pieces is two, the two cable clamping pieces are inserted into the sliding channel, and a cable passing channel used for clamping a cable is jointly formed between the two cable clamping pieces; the middle shell is connected to the interior of the outer shell in a sliding mode and is provided with a fastening groove used for being sleeved with at least part of the two thread clamping pieces at the same time, and the middle shell synchronously slides out of a port of the sliding channel along with the thread clamping pieces. In the scheme, the two thread clamping pieces are locked by the middle shell which extends out of the port of the sliding channel together with the thread clamping pieces and sleeves at least part of the entity on the thread clamping pieces, so that a limiting effect is provided for the thread clamping pieces extending out of the sliding channel, and the possibility that the thread clamping pieces extending out of the sliding channel are separated is reduced; and the cable clamping sheet extending out of the sliding channel can provide a continuous and stable clamping effect for the cable.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission equipment, and particularly relates to a strain clamp. Background Art

[0002] The strain clamp is an important part of the overhead power line, and its function is to fix the conductor and the lightning protection wire on the strain insulator (string) of the non-straight tower. After the wire clamping piece in the existing wedge-shaped strain clamp extends out of the groove body, the exposed end of the wire clamping piece is no longer limited and supported by the groove body, and the clamping effect on the cable is significantly reduced. Content of the Utility Model

[0003] In view of this, the utility model provides a strain clamp, which can lock two wire clamping pieces by a middle shell that extends out of the port of the sliding channel together with the wire clamping piece and sleeved on at least part of the entity of the wire clamping piece, provide a limiting effect on the wire clamping piece extending out of the sliding channel, reduce the possibility of separation of the wire clamping piece extending out of the sliding channel, and enable the wire clamping piece extending out of the sliding channel to provide a continuous and stable clamping effect on the cable.

[0004] To achieve the above object, the utility model provides the following technical solutions:

[0005] A strain clamp, comprising:

[0006] A housing, with both ends penetrating to form a sliding channel;

[0007] Two wire clamping pieces, both inserted into the inside of the sliding channel, and a wire passing channel for clamping the cable is jointly formed between the two wire clamping pieces;

[0008] A middle shell, slidably connected to the inside of the housing, and having a fastening groove for sleeving at least part of the two wire clamping pieces at the same time, and the middle shell slides out of the port of the sliding channel synchronously with the wire clamping piece.

[0009] Preferably, the outer wall of the housing has a plurality of first reinforcing rib plates arranged around the housing, and the first reinforcing rib plates are distributed at intervals along the length direction of the housing.

[0010] Preferably, the outer contour edges of the first reinforcing rib plates are flush in the length direction of the housing, and the area of the first reinforcing rib plates changes linearly along the length direction of the housing.

[0011] Preferably, there are second reinforcing rib plates between adjacent first reinforcing rib plates.

[0012] Preferably, the inner wall of the wire passing channel has anti-slip ribs, and the anti-slip ribs extend along the length direction of the housing and are arranged at an angle with the length direction of the housing.

[0013] Preferably, the wire clamping piece includes a wedge core inserted into the inside of the sliding channel, and a fastening rib fixed to the wedge core and attached to the inner wall of the fastening groove. When the wedge cores clamp the cable, the fastening ribs on the two wedge cores abut against each other.

[0014] Preferably, the middle shell is provided with a third reinforcing rib plate for preventing the middle shell from bending.

[0015] Preferably, the inner wall of the outer shell is provided with guiding ribs extending into the inside of the wire clamping piece for preventing the two wire clamping pieces from being misaligned.

[0016] As can be seen from the above technical solutions, the strain clamp provided by the present utility model locks the two wire clamping pieces through the middle shell that extends out of the port of the sliding channel together with the wire clamping piece and sleeved on at least part of the entity of the wire clamping piece, provides a limiting effect on the wire clamping piece extending out of the sliding channel, reduces the possibility of the wire clamping piece extending out of the sliding channel being separated, and enables the wire clamping piece extending out of the sliding channel to provide a continuous and stable clamping effect on the cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 is a schematic diagram showing the structure of the strain clamp according to an exemplary embodiment;

[0019] Figure 2 is a schematic diagram showing the position of the sliding groove according to an exemplary embodiment;

[0020] Figure 3 is a schematic diagram showing the structure of the wire clamping piece according to an exemplary embodiment;

[0021] Figure 4 is a schematic diagram showing the structure of the fastening groove according to an exemplary embodiment.

[0022] REFERENCE SIGNS:

[0023] 1. Outer shell; 11. First reinforcing rib plate; 12. Second reinforcing rib plate; 13. Sliding groove; 14. Guiding rib; 15. Sliding channel; 2. Wire clamping piece; 21. Wire passing channel; 22. Wedge core; 23. Fastening rib; 24. Anti-slip rib; 25. Guiding groove; 3. Middle shell; 31. Fastening groove; 32. Third reinforcing rib plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0024] The utility model discloses a strain clamp, which can lock two clamping pieces by extending out of the port of the self-sliding channel together with the clamping piece and sleeving on at least part of the entity of the clamping piece, provide a limiting effect on the clamping piece extending out of the sliding channel, reduce the possibility of separation of the clamping piece extending out of the sliding channel, and enable the clamping piece extending out of the sliding channel to provide a continuous and stable clamping effect on the cable.

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0026] In an exemplary embodiment of the present disclosure, a strain clamp is provided, as Figure 1 shown Figure 1 is a schematic diagram showing the structure of a strain clamp according to an exemplary embodiment; Figure 2 is a schematic diagram showing the position of a chute according to an exemplary embodiment; Figure 3 is a schematic diagram showing the structure of a clamping piece according to an exemplary embodiment; Figure 4 is a schematic diagram showing the structure of a fastening groove according to an exemplary embodiment. The following will be explained in conjunction with Figures 1 to 4 for explanation.

[0027] Some specific implementation manners described hereinafter are intended to facilitate those skilled in the art to understand the present embodiment, and the present embodiment is not limited to some specific implementation manners described hereinafter.

[0028] Referring to Figure 1 and Figure 2 , a strain clamp provided in an exemplary embodiment of the present disclosure includes:

[0029] A housing 1, with both ends penetrating to form a sliding channel 15;

[0030] Clamping pieces 2, there are two and both are inserted into the inside of the sliding channel 15, and a wire passing channel 21 for clamping the cable is jointly formed between the two clamping pieces 2;

[0031] An intermediate shell 3, slidably connected to the inside of the housing 1, and having a fastening groove 31 for sleeving at least part of the two clamping pieces 2 at the same time, and the intermediate shell 3 slides out of the port of the sliding channel 15 synchronously with the clamping pieces 2.

[0032] Exemplarily, referring to Figure 1 and Figure 2, the sliding channel 15 extends from one end of the outer shell 1 to the other end of the outer shell 1 and penetrates the outer shell 1 from one side wall of the outer shell 1. The cross-sectional contour of the sliding channel 15 is in the shape of a horizontally placed isosceles trapezoid. The end with a smaller opening among the two ends of the sliding channel 15 is the tail end of the sliding channel 15, and the end with a larger opening among the two ends of the sliding channel 15 is the head end of the sliding channel 15. The cross-sectional contour of the wire clamping piece 2 is in the shape of a horizontally placed right-angled trapezoid. After the two wire clamping pieces 2 are combined by leaning against each other to form a posture adapted to the contour of the sliding channel 15, the end with a smaller end face of the wire clamping piece 2 extends into the sliding channel 15 from the head end of the sliding channel 15 and moves along the length direction of the outer shell 1 towards the tail end of the sliding channel 15 to realize the installation of the wire clamping piece 2. The wire passing channel 21 is formed between the side walls where the two wire clamping pieces 2 lean against each other. The side wall of the wire clamping piece 2 for leaning against the other wire clamping piece 2 is recessed inward to form a groove with an arc-shaped side wall and a semi-circular cross-section. After the two wire clamping pieces 2 are leaned against each other, the two aforementioned grooves belonging to the two wire clamping pieces 2 jointly form a wire passing channel 21 for accommodating the wire. The two ends of the wire passing channel 21 respectively extend to the two ends of the wire clamping piece 2.

[0033] Refer to Figure 3 and Figure 4 , the wire clamping piece 2 includes a wedge core 22 inserted into the interior of the sliding channel 15 and a fastening rib 23 fixed to the wedge core 22 and fitting against the inner wall of the fastening groove 31. When the wedge core 22 clamps the wire, the fastening ribs 23 on the two wedge cores 22 abut against each other. The interior of the sliding channel 15 is divided into two spaces of the same size and shape on the left and right along the midline of the outer shell 1, and the two wire clamping pieces 2 respectively occupy and fill the aforementioned left and right spaces. The fastening rib 23 is integrally formed on the bottom surface of the wedge core 22 and extends downward. The fastening rib 23 extends from one end of the wedge core 22 along the length direction of the wedge core 22 to the other end of the wedge core 22. A sliding groove 13 extending towards the solid interior of the outer shell 1 is formed on the inner bottom wall of the sliding channel 15. The sliding groove 13 extends from the head end of the outer shell 1 along the length direction of the outer shell 1 to the tail end of the outer shell 1. The wedge core 22 is located in the sliding channel 15 and is slidably connected to the outer shell 1 along the length direction of the sliding channel 15. The middle shell 3 is filled in the interior of the sliding groove 13 and is slidably connected to the outer shell 1 along the length direction of the sliding groove 13. The middle shell 3 has a box structure with one end closed and the opening facing upward. The fastening groove 31 is formed inside the middle shell 3 and communicates with the sliding channel 15 through the aforementioned upward opening. The fastening rib 23 extends into the interior of the fastening groove 31 of the middle shell 3 through the aforementioned upward opening. When the wedge core 22 makes a relative movement with respect to the outer shell 1 inside the sliding channel 15, that is, when it exposes from the tail end of the outer shell 1, the fastening rib 23 abutting against the closed end of the middle shell 3 can drive the middle shell 3 to slide out of the outer shell 1 together from the tail end of the outer shell 1, thereby providing lateral limitation for the ends of the two wedge cores 22 extending outside the outer shell 1 and reducing the possibility of separation of the ends of the two wedge cores 22 extending outside the outer shell 1.

[0034] The middle shell 3 is provided with a third reinforcing rib plate 32 for preventing the middle shell 3 from bending. The outer contour of the third reinforcing rib plate 32 is in the shape of a horizontally placed triangular prism, and the cross-section of the third reinforcing rib plate 32 is in the shape of a right triangle. That is, in addition to having two end faces, the third reinforcing rib plate 32 also has two relatively perpendicular outer side walls (the first wall, the second wall), and an outer side wall (the third wall) that is angled with respect to the aforementioned two side walls (the aforementioned first wall and the aforementioned second wall). The third reinforcing rib plate 32 is fixed inside the fastening groove 31 of the middle shell 3. The third reinforcing rib plate 32 is fixed on both opposite inner side walls of the fastening groove 31. One outer side wall (the aforementioned first wall) of the third reinforcing rib plate 32 is fixed to the inner side wall of the fastening groove 31, and the other outer side wall (the aforementioned second wall) of the third reinforcing rib plate 32 is fixed to the inner bottom wall of the fastening groove 31. The third reinforcing rib plate 32 is fixed between the side wall and the bottom wall of the fastening groove 31, thereby enhancing the bending strength of the middle shell 3. The fastening rib 23 abuts against the inner bottom wall of the fastening groove 31 while abutting against the other outer wall (the aforementioned third wall) of the third reinforcing rib plate 32.

[0035] Additional reference Figure 2 , the inner wall of the outer shell 1 is provided with a guiding rib 14 that extends into the inside of the wire clamping piece 2 and is used to prevent the two wire clamping pieces 2 from being misaligned. The guiding rib 14 is integrally formed on the inner side wall of the sliding channel 15. The guiding rib 14 is provided on both opposite inner side walls of the sliding channel 15. The guiding rib 14 extends from the head of the outer shell 1 along the length direction of the inner side wall of the sliding channel 15 to the tail end of the outer shell 1, and the guiding rib 14 is located at the middle position of the height inside the sliding channel 15. A guiding groove 25 is provided on the outer wall of the wedge core 22 for abutting, and the guiding groove 25 extends into the solid structure of the wedge core 22 and is adapted to the guiding rib 14. The guiding rib 14 is inserted into the guiding groove 25 and provides a vertical limit for the wedge core 22, reducing the possibility of the wedge core 22 generating vertical displacement or torsion relative to the outer shell 1.

[0036] Continue to refer to Figure 3 and Figure 4 , the inner wall of the wire passing channel 21 is provided with anti-slip ribs 24. The anti-slip ribs 24 extend along the length direction of the outer shell 1 and are angled with respect to the length direction of the outer shell 1. The anti-slip ribs 24 are formed on the two wire clamping pieces 2 inside the same sliding channel 15. The anti-slip ribs 24 are in a spiral shape and extend from one end of the wire passing channel 21 to the other end of the wire passing channel 21. The anti-slip ribs 24 are arranged around the inner wall of the wire passing channel 21. Each of the two wire clamping pieces 2 has half of the solid structure of the anti-slip ribs 24. After the wire clamping piece 2 clamps the cable, the anti-slip ribs 24 force some entities on the cable to generate a deformation that does not easily affect the use safety, so as to apply a greater pressure to the cable and reduce the possibility of the cable loosening from the wire clamping piece 2.

[0037] In this embodiment, the middle shell 3 that protrudes from the port of the self-sliding channel 15 together with the wire clamping piece 2 and sleeved on at least part of the entity of the wire clamping piece 2 locks the two wire clamping pieces 2, providing a limiting effect on the wire clamping piece 2 protruding out of the self-sliding channel 15, reducing the possibility of the wire clamping piece 2 protruding out of the self-sliding channel 15 from separating, and enabling the wire clamping piece 2 protruding out of the self-sliding channel 15 to provide a continuous and stable clamping effect on the cable.

[0038] In an exemplary embodiment of the present disclosure, referring to Figure 1 , the outer wall of the housing 1 has a plurality of first reinforcing rib plates 11 arranged around the housing 1, and the first reinforcing rib plates 11 are spaced apart along the length direction of the housing 1.

[0039] Exemplarily, referring to Figure 1 and Figure 2 , the first reinforcing rib plate 11 is arranged around the outer wall of the housing 1 and protrudes beyond the outer contour of the housing 1. The outer contour edges of the first reinforcing rib plate 11 are flush in the length direction of the housing 1, and the exposed area of the first reinforcing rib plate 11 changes linearly along the length direction of the housing 1, that is, it gradually increases from the head of the housing 1 to the tail end of the housing 1 along the length direction of the housing 1.

[0040] In this embodiment, there is a second reinforcing rib plate 12 between adjacent first reinforcing rib plates 11. The second reinforcing rib plate 12 is also arranged around the outer wall of the housing 1 and protrudes beyond the outer contour of the housing 1. The outer contour edges of the second reinforcing rib plate 12 are flush in the length direction of the housing, and the exposed area of the second reinforcing rib plate 12 gradually increases from the head of the housing 1 to the tail end of the housing 1 along the length direction of the housing 1. There is one second reinforcing rib plate 12 between adjacent two first reinforcing rib plates 11.

[0041] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

Claims

1. A tension clamp, characterized in that: include: The housing (1) has two ends connected to form a sliding channel (15); There are two wire clamping pieces (2) which are both inserted into the sliding channel (15), and the two wire clamping pieces (2) together form a wire passage channel (21) for clamping the cable; The middle shell (3) is slidably connected to the inside of the outer shell (1) and has a fastening groove (31) for simultaneously sleeved at least part of the two clamping pieces (2). The middle shell (3) slides out from the port of the sliding channel (15) synchronously with the clamping pieces (2).

2. The tension clamp according to claim 1, characterized in that: The outer wall of the outer shell (1) has a plurality of first reinforcing rib plates (11) arranged around the outer shell (1), and the first reinforcing rib plates (11) are distributed at intervals along the length direction of the outer shell (1).

3. The tension clamp according to claim 2, characterized in that: The outer contour edge of the first reinforcing rib plate (11) is flush in the length direction of the outer shell (1), and the area of ​​the first reinforcing rib plate (11) changes linearly along the length direction of the outer shell (1).

4. The tension clamp according to claim 2, characterized in that: A second reinforcing rib plate (12) is provided between adjacent first reinforcing rib plates (11).

5. The tension clamp according to claim 1, characterized in that: The inner wall of the wire passage (21) is provided with anti-skid ribs (24), the anti-skid ribs (24) extending along the length direction of the outer shell (1) and arranged at an angle with the length direction of the outer shell (1).

6. The tension clamp according to claim 1, characterized in that: The cable clamp (2) comprises a wedge core (22) inserted into the sliding channel (15), and a fastening rib (23) fixed to the wedge core (22) and in contact with the inner wall of the fastening groove (31); when the wedge core (22) clamps the cable, the fastening ribs (23) on the two wedge cores (22) abut against each other.

7. The tension clamp according to claim 6, characterized in that: The middle shell (3) is provided with a third reinforcing rib plate (32) for preventing the middle shell (3) from bending.

8. The tension clamp according to claim 1, characterized in that: The inner wall of the outer shell (1) has a guide rib (14) extending into the interior of the clamping piece (2) and used to prevent the two clamping pieces (2) from vertically misaligning.

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