CN214314450U

CN214314450U - Self-locking wedge-shaped strain clamp

Info

Publication number: CN214314450U
Application number: CN202120187406.0U
Authority: CN
Inventors: 金浩; 闫昌干; 黄豪威; 戴友兵; 金宝洁
Original assignee: Zhongwang Electric Power Technology Co ltd
Current assignee: Zhongwang Electric Power Technology Co ltd
Priority date: 2021-01-22
Filing date: 2021-01-22
Publication date: 2021-09-28
Anticipated expiration: 2031-01-22

Abstract

The utility model relates to a self-locking wedge-shaped strain clamp, which comprises a wedge-shaped clamp for clamping a wire, a connecting hardware connected with a fastening clamp, and a cylindrical insulator arranged between the clamp and the connecting hardware, wherein two ends of the insulator are respectively formed by compression joint with the clamp and the connecting hardware, and the connecting hardware is provided with a pull ring at one end of the connecting hardware, which is far away from the clamp; the wire clamp comprises an outer wedge fixedly connected with the insulator and an inner wedge which slides in the outer wedge in a one-way mode, a self-locking hole which penetrates through the outer wedge in an inclined mode is formed in the middle of the outer wedge, and the top end of the inner wedge and the upper end of the inner wall of the self-locking hole are enclosed to form a wire fixing hole; the wire clamp of the novel self-locking wedge-shaped strain clamp is of a wedge-shaped structure, stress distribution is uniform, strength is higher, and the wire is pulled more and more tightly through the one-way sliding sleeve joint of the inner wedge and the outer wedge, so that the wire is effectively prevented from loosening; the integrated structure is formed after the connecting hardware fitting, the insulator and the wire clamp are connected in a compression mode, and therefore the integrated structure is convenient and fast to install on a circuit and firm and reliable in connection.

Description

Self-locking wedge-shaped strain clamp

Technical Field

The utility model relates to an electric field especially relates to a from locking-type wedge strain clamp.

Background

The strain clamp is a hardware tool which is used for fixing a lead to bear the tension of the lead and hanging the lead on a strain insulator-string group or a tower, is mainly applied to circuit erection, and has the advantages of high strength, reliable holding power, simplicity in installation, convenience in construction and the like; after the existing tension-resistant wire clamp is used for a long time, the wire clamp is easy to generate abnormity such as looseness or deformation under the action of the tension of a wire, and a larger potential safety hazard is caused; meanwhile, when the tension-resistant wire clamp is disassembled, the inner wedge and the outer wedge are difficult to separate after being stressed for a long time.

SUMMERY OF THE UTILITY MODEL

The utility model relates to a self-locking wedge-shaped strain clamp, which comprises a wedge-shaped clamp for clamping a wire, a connecting hardware connected with a fastening clamp, and a cylindrical insulator arranged between the clamp and the connecting hardware, wherein two ends of the insulator are respectively formed by compression joint with the clamp and the connecting hardware, and the connecting hardware is provided with a pull ring at one end of the connecting hardware, which is far away from the clamp; the wire clamp comprises an outer wedge fixedly connected with the insulator and an inner wedge which slides in the outer wedge in a one-way mode, the middle of the outer wedge is provided with a self-locking hole which penetrates obliquely, the self-locking hole is inclined to be reduced downwards and the bottom end of the self-locking hole horizontally turns to a wire access end, and the top end of the inner wedge and the upper end of the inner wall of the self-locking hole are enclosed to form a wire fixing hole; the wire clamp of the novel self-locking wedge-shaped strain clamp is of a wedge-shaped structure, stress distribution is uniform, strength is higher, and the wire is pulled more and more tightly through the one-way sliding sleeve joint of the inner wedge and the outer wedge, so that the wire is effectively prevented from loosening; the integrated structure is formed after the connecting hardware fitting, the insulator and the wire clamp are connected in a compression mode, and therefore the integrated structure is convenient and fast to install on a circuit and firm and reliable in connection.

The technical scheme of the utility model as follows:

a self-locking wedge-shaped strain clamp comprises a wedge-shaped clamp for clamping a lead, a connecting hardware connected with a fastening clamp, and a cylindrical insulator arranged between the clamp and the connecting hardware, wherein two ends of the insulator are respectively formed by compression joint with the clamp and the connecting hardware, and a pull ring is arranged at one end of the connecting hardware, which is far away from the clamp; the wire clamp comprises an outer wedge fixedly connected with the insulator and an inner wedge which slides in the outer wedge in a one-way mode, a self-locking hole which is obliquely penetrated is formed in the middle of the outer wedge, the self-locking hole is obliquely bent towards a downward necking part and the bottom end of the self-locking hole, and the top end of the inner wedge and the upper end of the inner wall of the self-locking hole are enclosed to form a wire fixing hole.

Preferably, the inclination angle alpha of the self-locking hole is 40-50 degrees, and the included angle beta of the necking of the self-locking hole is 8-10 degrees.

The outer wedge is provided with a swing type limiting block below the self-locking hole, and the limiting block is fixedly connected with the outer wedge at the small opening end of the self-locking hole; at the large opening end of the self-locking hole, the limiting block is in locking connection with the outer wedge through screw threads.

The lower end of the side face of the inner wedge is provided with a sliding chute parallel to the bottom end of the self-locking hole, and the bottom end of the sliding chute turns towards the lower end part of the inner wedge; and a guide post is arranged at the position of the outer wedge corresponding to the sliding groove.

The inner wedge is provided with a gland at an outlet at the upper end of the fixing hole, and the gland and the top end of the inner wedge are enclosed to form a locking hole parallel to the fixing hole; and a plurality of convex annular anti-slip teeth are arranged on the inner walls of the fixing hole and the locking hole.

The radial section of the fixing hole is a cone, and the minor axis of the cone of the fixing hole is smaller than the diameter of the clamped wire.

The side face of the insulator is provided with a plurality of umbrella skirts extending outwards, and the umbrella skirts and the insulator are integrally formed.

The extending length of the umbrella skirt is larger than the radius of the insulator and smaller than the diameter of the insulator, and the umbrella skirts with the same or different diameters are combined and arranged on the outer side of the insulator.

Wherein, the insulator is provided with corrugated interlock tooth at the junction with fastener and link fitting.

And one end of the outer wedge, which is far away from the connecting hardware fitting, is provided with a wire tightening hanging lug.

The utility model discloses following beneficial effect has:

1. compare with original strain clamp, the utility model discloses be wedge structure from the fastener of locking-type wedge strain clamp, stress distribution is even and intensity is higher, cup joints with outer wedge one-way slip through the inner wedge, makes the wire draw more tight, prevents effectively that the wire is not hard up.

2. The utility model forms an integrated structure after connecting hardware fittings, insulators and wire clamps and crimping, which is not only more convenient in circuit installation, but also more firm and reliable in connection; the insulator is provided with the interlock tooth of corrugate in the junction with fastener and link fitting, has strengthened the joint strength of insulator with link fitting and fastener.

3. The inclination angle alpha of the self-locking hole on the outer wedge is 40-50 degrees, so that the effect of self-locking hole contraction can be ensured, the drawing force of the wire can be decomposed on the outer wedge, and the surface of the wire is prevented from being damaged by drawing; the included angle beta of the self-locking hole necking is 8-10 degrees, the grip strength of the wire clamp is more transmitted to the wire core within the angle range, the drawing of the wire clamp is reduced, and the connecting capacity of the wire clamp to a wire is improved.

4. The utility model discloses the distance passes through the screw control between stopper and the outer wedge, and then can adjust the size from the lockhole, when needs take out the inner wedge from the outer wedge, can screw the screw of being connected between stopper and the outer wedge, and the convenient inner wedge is taken out from the lockhole.

5. The utility model discloses interior wedge and outer wedge sliding connection, spout and guide post play the direction limiting displacement, not only can make the interior wedge slide along the lower extreme from the lockhole, can prevent moreover that the interior wedge from deviating from the outer wedge, are convenient for transport and stack the management.

6. The utility model discloses the insulator is provided with a plurality of overhanging sheds on its side, overhanging sheds increase the creepage distance of fastener and link fitting, prevent effectively that the insulator from being punctured and lead to the electric leakage unusual, have improved the security of strain clamp; the outer sides of the insulators can be arranged and combined with the umbrella skirt groups with the same or different diameters, so that the strain clamp can respond to different transmission voltages.

Drawings

FIG. 1 is a schematic view of the present invention;

fig. 2 is a top view of the present invention;

FIG. 3 is an assembly view of the present invention;

FIG. 4 is a cross-sectional view of the outer wedge of the present invention;

FIG. 5 is a partial cross-sectional view of the outer wedge of the present invention;

fig. 6 is a partial cross-sectional view of the gland position of the present invention.

The reference numbers in the figures denote:

1-wire clamp, 11-outer wedge, 111-self-locking hole, 112-fixing hole, 113-limiting block, 114-guide column, 115-wire tightening suspension loop, 12-inner wedge, 121-sliding groove, 122-pressing cover, 123-locking hole, 124-anti-slip tooth, 2-link fitting, 21-pulling ring, 3-insulator, 31-umbrella skirt, 32-meshing tooth and 4-screw.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1 to 6, the self-locking wedge-shaped strain clamp comprises a wedge-shaped clamp 1 for clamping a lead, a connecting hardware fitting 2 connected with a fastening clamp, and a cylindrical insulator 3 arranged between the clamp 1 and the connecting hardware fitting 2, wherein the clamp 1 is in a wedge-shaped structure formed by die-casting non-magnetic special aluminum alloy, and has uniform stress distribution and higher strength; the two ends of the insulator 3 are respectively in compression joint with the wire clamp 1 and the connecting hardware fitting 2 for forming, and the insulator 3, the wire clamp 1 and the connecting hardware fitting 2 are in an integrated structure after compression joint forming, so that the circuit installation is more convenient, and the connection is firmer and more reliable; the end, far away from the wire clamp 1, of the connecting hardware fitting 2 is provided with a pull ring 21, and the pull ring 21 is convenient to connect with a hardware fitting on a strain insulator-string group or a tower; the wire clamp 1 comprises an outer wedge 11 fixedly connected with the insulator 3 and an inner wedge 12 which slides in the outer wedge 11 in a one-way mode, and the inner wedge 12 is sleeved with the outer wedge 11 in a one-way sliding mode, so that a wire is pulled more and more tightly, and the wire is effectively prevented from loosening; the middle part of the outer wedge 11 is provided with an inclined through self-locking hole 111, the self-locking hole 111 inclines to a downward necking, the bottom end of the self-locking hole horizontally turns to a lead access end, and the lead access end and the pull ring 21 are positioned on the same horizontal plane, so that torsion of the strain clamp is effectively prevented, and the service life of the strain clamp is prolonged; the top end of the inner wedge 12 and the upper end of the inner wall of the self-locking hole 111 enclose to form a wire fixing hole 112.

Preferably, referring to fig. 4, the inclination angle α of the self-locking hole 111 is 40 to 50 °, and the range of the inclination angle α not only can ensure the effect of shrinking the self-locking hole 111, but also can decompose the drawing force of the wire onto the outer wedge 11, thereby avoiding the surface of the wire from being damaged by pulling; the included angle beta of 111 throats from the lockhole is 8 ~ 10, and this angle scope makes the transmission of more of grip of fastener 1 to the sinle silk, reduces drawing of fastener 1, improves fastener 1 to the connection ability of wire.

Further, referring to fig. 5, a swing type stopper 113 is disposed below the self-locking hole 111 of the outer wedge 11, and the stopper 113 is integrally formed with the outer wedge 11 at a small opening end of the self-locking hole 111; at the big opening end of self-locking hole 111, pass through screw 4 screw thread locking connection between stopper 113 and the outer wedge 11, the distance passes through screw 4 control between stopper 113 and the outer wedge 11, and then can adjust the size of self-locking hole 111, when needs take out interior wedge 12 from the outer wedge 11, can screw the screw 4 of being connected between stopper 113 and the outer wedge 11, makes things convenient for interior wedge 12 to take out from self-locking hole 111.

Furthermore, the lower end of the side surface of the inner wedge 12 is provided with a sliding groove 121 parallel to the bottom end of the self-locking hole 111, and the bottom end of the sliding groove 121 turns towards the lower end part of the inner wedge 12, so that the distance of the inner wedge 12 from the outer wedge 11 is the largest, and the installation and fixation operation of a lead is facilitated; the outer wedge 11 is provided with a guide post 114 at a position corresponding to the sliding groove 121, and the sliding groove 121 and the guide post 114 play a role in guiding and limiting, so that the inner wedge 12 can slide along the lower end of the self-locking hole 111, and the inner wedge 12 can be prevented from being separated from the outer wedge 11, thereby facilitating the integrated transportation and stacking management of the inner wedge 12 and the outer wedge 11.

Further, referring to fig. 6, a gland 122 is arranged at an outlet of the upper end of the fixing hole 112 of the inner wedge 12, the gland 122 and the top end of the inner wedge 12 enclose to form a locking hole 123 parallel to the fixing hole 112, and the wire can be fixedly locked relative to the inner wedge 12 by locking of the screw 4 on the gland 122, so as to effectively prevent the wire from loosening and sliding; the inner walls of the fixing hole 112 and the locking hole 123 are provided with a plurality of outward protruding annular anti-slip teeth 124, and the anti-slip teeth 124 play a role in further locking and limiting.

Furthermore, the radial cross section of the fixing hole 112 is conical, the minor axis of the conical circle of the fixing hole 112 is smaller than the diameter of the clamped wire, the extrusion force on the wire can be increased by the conical fixing hole 112, the extruded wire is compressed and deformed, the connection strength between the deformed wire and the wire clamp 1 is higher, and the connection capacity of the wire clamp 1 on the wire is improved.

Further, the insulator 3 is provided with a plurality of overhanging sheds 31 on its side, the sheds 31 with insulator 3 integrated into one piece, overhanging sheds 31 have increased the creepage distance of fastener 1 and link fitting 2, effectively prevent insulator 3 from being punctured and lead to the electric leakage unusual, have improved the security of strain clamp.

Further, the overhanging length of the umbrella skirt 31 is larger than the radius of the insulator 3 and smaller than the diameter of the insulator 3, and a plurality of groups of umbrella skirts 31 with the same or different diameters can be arranged and combined outside the insulator 3, so that the strain clamp can respond to different transmission voltages.

Further, insulator 3 is provided with corrugated interlock tooth 32 in the junction with fastener 1 and link fitting 2, and interlock tooth 32 has strengthened the joint strength of insulator 3 with link fitting 2 and fastener 1, effectively prevents to deviate from the separation unusual.

Further, the outer wedge 11 is provided with a wire tightening lug 115 at one end far away from the link fitting 2, and the wire tightening lug 115 facilitates installation and connection of the wire tightening fitting.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims

1. The utility model provides a from locking-type wedge strain clamp which characterized in that: the clamp comprises a wedge-shaped wire clamp (1) for clamping a wire, a connecting hardware fitting (2) connected with a fastening clamp, and a cylindrical insulator (3) arranged between the wire clamp (1) and the connecting hardware fitting (2), wherein two ends of the insulator (3) are respectively in compression joint with the wire clamp (1) and the connecting hardware fitting (2) for molding, and one end of the connecting hardware fitting (2), which is far away from the wire clamp (1), is provided with a pull ring (21); fastener (1) include with insulator (3) fixed connection's outer wedge (11) and outer wedge (11) interior one-way slip inner wedge (12), the middle part of outer wedge (11) is provided with from lockhole (111) that a slope runs through, from lockhole (111) slope throat and bottom level turn to the wire incoming end downwards, the top of inner wedge (12) and the upper end from lockhole (111) inner wall enclose to close and form a wire fixed orifices (112).

2. The self-locking wedge strain clamp of claim 1, wherein: the inclination angle alpha of the self-locking hole (111) is 40-50 degrees, and the included angle beta of the necking of the self-locking hole (111) is 8-10 degrees.

3. The self-locking wedge strain clamp of claim 1, wherein: the outer wedge (11) is provided with a swing type limiting block (113) below the self-locking hole (111), and the limiting block (113) is fixedly connected with the outer wedge (11) at the small opening end of the self-locking hole (111); at the large opening end of the self-locking hole (111), the limiting block (113) is in threaded locking connection with the outer wedge (11) through a screw (4).

4. The self-locking wedge strain clamp of claim 1, wherein: the lower end of the side face of the inner wedge (12) is provided with a sliding chute (121) which is parallel to the bottom end of the self-locking hole (111), and the bottom end of the sliding chute (121) turns towards the lower end part of the inner wedge (12); the outer wedge (11) is provided with a guide column (114) at a position corresponding to the sliding groove (121).

5. The self-locking wedge strain clamp of claim 1, wherein: a gland (122) is arranged at an outlet of the upper end of the fixing hole (112) of the inner wedge (12), and the gland (122) and the top end of the inner wedge (12) are enclosed to form a locking hole (123) parallel to the fixing hole (112); the inner walls of the fixing hole (112) and the locking hole (123) are provided with a plurality of convex annular anti-slip teeth (124).

6. The self-locking wedge strain clamp of claim 1, wherein: the radial section of the fixing hole (112) is a cone, and the minor axis of the cone of the fixing hole (112) is smaller than the diameter of the clamped wire.

7. The self-locking wedge strain clamp of claim 1, wherein: the side face of the insulator (3) is provided with a plurality of umbrella skirts (31) which extend outwards, and the umbrella skirts (31) and the insulator (3) are integrally formed.

8. The self-locking wedge strain clamp of claim 7, wherein: the extending length of the umbrella skirt (31) is larger than the radius of the insulator (3) and smaller than the diameter of the insulator (3), and the umbrella skirts (31) with the same or different diameters are combined and arranged on the outer side of the insulator (3).

9. The self-locking wedge strain clamp of claim 1, wherein: the insulator (3) is provided with corrugated occlusion teeth (32) at the connection part of the wire clamp (1) and the connecting hardware fitting (2).

10. The self-locking wedge strain clamp of claim 1, wherein: and one end of the outer wedge (11) far away from the connecting hardware fitting (2) is provided with a wire tightening hanging lug (115).