CN112072587A

CN112072587A - Double-wedge-shaped strain clamp

Info

Publication number: CN112072587A
Application number: CN202010748270.6A
Authority: CN
Inventors: 林伟; 林柏阳; 陈伟卫; 胡昌发; 祁凯灵
Original assignee: Hongguang Electric Group Co ltd
Current assignee: Hongguang Electric Group Co ltd
Priority date: 2020-07-30
Filing date: 2020-07-30
Publication date: 2020-12-11
Anticipated expiration: 2040-07-30
Also published as: CN112072587B

Abstract

The invention discloses a double-wedge-shaped strain clamp, which comprises a hanging plate frame, a wedge-shaped shell, a wedge-shaped piece and a wedge-shaped frame, wherein the wedge-shaped piece is arranged in the wedge-shaped shell, the wedge-shaped frame is arranged at the lower end part of the hanging plate frame, a wedge-shaped block is arranged in the middle of the front end surface of the wedge-shaped frame, a wedge-shaped sliding groove is formed between the wedge-shaped block and the side wall of the wedge-shaped frame, the wedge-shaped shell is provided with a wedge-shaped plate matched with the wedge-shaped sliding groove, the wedge-shaped frame is also provided with a limiting plate used for limiting the wedge-shaped plate to slide along the wedge-shaped groove; the advantage can realize the preliminary fixed cable conductor function of strain clamp through the cooperation of wedge and wedge casing, and after the effort increase that strain clamp received, the wedge casing slided downwards from the wedge, played the cushioning effect to the cable conductor to realize pressing from both sides tightly the cable conductor through the cooperation of wedge and wedge casing, ensure the reliability of two wedge strain clamps.

Description

Double-wedge-shaped strain clamp

Technical Field

The invention relates to the field of strain clamps, in particular to a double-wedge-shaped strain clamp.

Background

With the rapid development of power utility facilities for power distribution networks, a variety of connecting and fixing clamps for cables have been invented, including ground clamps, strain clamps, parallel groove clamps, and the like. The electric power cable is mostly great high-voltage cable of diameter, and the fastener of using usefulness is often needed to be strained fixedly when fixed electric power cable, reduces the manual fixed unreliability of tradition. The terminal or two ends of the overhead cable under 20KV need to be tightened and fixed through strain clamps.

At present, most wedge-shaped strain clamps which are compressed by extrusion are adopted in the market to be connected, each strain clamp consists of a shell piece with a C-shaped opening and a wedge-shaped body and a wedge-shaped piece, only one protection device is used in the existing wedge-shaped clamp, namely the wedge-shaped piece is compressed by matching the wedge-shaped shell and the wedge-shaped piece, when the existing wedge-shaped clamp is compressed by the mode, the strain clamps are mostly installed outdoors and erected at high altitude, so that the strain clamps are difficult to be corroded by sun-cured oxidation and rainwater, when the cable is tensioned, the cable is erected at high altitude and influenced by wind power, acting force exerted on the strain clamp by the cable is changed constantly, the requirement on the strain clamps is higher, the traditional strain clamp needs to carry out a complex production and processing process for meeting the requirement, the production cost of an enterprise is greatly increased, and the strain clamp cannot be reliably protected when the action exerted on the strain clamp by the cable is suddenly changed, and in case the strain clamp can't reliably strain fixedly to the cable, can lead to the cable to produce and rock, to cable production wearing and tearing, the storm weather can appear when serious that the mutual contact takes place the short circuit phenomenon between the cable, leads to the occurence of failure.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: the double-wedge strain clamp is simple in structure and production process and can reliably tighten and fix a lead.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a double wedge strain clamp, includes hanger frame, wedge casing and wedge, still includes the wedge frame, the wedge casing inside be provided with wedge matched with wedge installation cavity, the wedge set up the wedge installation cavity in, the wedge frame set up the lower tip of hanger frame, the wedge frame before the middle part of terminal surface be provided with the wedge, the lateral wall of wedge and wedge frame between form the wedge spout, the wedge casing be provided with wedge spout matched with wedge plate, the wedge frame still be provided with and be used for restricting the wedge plate along the gliding limiting plate of wedge spout, the wedge casing be provided with anticreep piece, the hanger frame be provided with along its length direction with the corresponding spacing hole of anticreep piece, anticreep piece nestification spacing downthehole.

Furthermore, the wedge-shaped plate is integrally and fixedly arranged at the lower part of the rear end surface of the wedge-shaped shell, the width of the wedge-shaped plate is gradually increased from top to bottom, the rear end surface of the wedge-shaped shell is provided with an opening along the length direction of the wedge-shaped shell, and the opening is positioned in the middle of the wedge-shaped plate; the advantage lies in that the setting of wedge board can make the wedge casing slide along the wedge spout, and the opening lies in the middle part of wedge board and can make the atress even when the wedge casing uses, avoids receiving when great effort, because of the inhomogeneous damage rupture of atress.

Furthermore, a plurality of support ribs are arranged on the wedge-shaped shell, the support ribs are annularly arranged on the outer side of the wedge-shaped shell, and the support ribs are uniformly distributed along the length direction of the wedge-shaped shell; the wedge-shaped shell has the advantages that the strength of the wedge-shaped shell can be effectively improved by the aid of the uniformly distributed support ribs.

Furthermore, the wedge block extends into the opening of the wedge shell, the upper end part of the wedge is provided with a limiting part for preventing the wedge from slipping out of the wedge shell, and the limiting part is arranged opposite to the wedge block; the double-wedge strain clamp has the advantages that the limiting piece is arranged, so that the double-wedge strain clamp can not slip out of the wedge-shaped mounting cavity when the double-wedge strain clamp is subjected to a large acting force, and the reliability of the double-wedge strain clamp and the cable tensioning capacity are improved.

Furthermore, the width of the wedge-shaped block is gradually increased from top to bottom, and the width of the wedge-shaped sliding groove is gradually decreased from top to bottom.

Furthermore, reinforcing ribs are annularly arranged on the outer side of the wedge-shaped frame; the advantage lies in that the strengthening rib that sets up can improve the steadiness and the self intensity of wedge frame, avoids taking place deformation when receiving external force, the crack appears even.

Furthermore, the limiting plate and the side wall of the wedge-shaped frame are integrally fixed, the front end of the limiting plate is integrally and fixedly provided with a fixing plate, and the fixing plate and the side wall of the wedge-shaped frame are integrally fixed; the advantage lies in can improving the support intensity of limiting plate through the fixed plate, avoids can ensure the stability of wedge casing when the wedge casing receives the exogenic action of slope, prevents the limiting plate fracture, avoids appearing breaking away from the wedge frame because of the wedge casing that the limiting plate fracture leads to.

Furthermore, the wedge piece comprises a left wire clamp and a right wire clamp, the left wire clamp and the right wire clamp are both provided with grooves for placing cables, and anti-skid grains are arranged in the grooves; the advantage lies in pressing from both sides the tight cable conductor that can be better through setting up left fastener and the right fastener in wedge installation cavity, and the setting of antiskid line can effectively improve the clamping capacity of wedge.

Furthermore, the limiting part comprises a left limiting block arranged on the left wire clamp and a right limiting block arranged on the right wire clamp, the left limiting block is integrally and fixedly provided with a transverse lug, the right limiting block is provided with a fixing hole corresponding to the lug, and the lug is embedded in the fixing hole; the advantage lies in that the setting of lug and fixed orifices can be at the synchronous motion of wedge piece removal assurance left fastener and right fastener, avoids appearing the fastener dislocation phenomenon of traditional strain clamp.

Furthermore, the two sides of the wedge-shaped shell are integrally and fixedly provided with anti-falling parts, and the wedge-shaped frame is fixedly arranged at the lower end part of the hanging plate frame through bolts.

Compared with the prior art, the tension clamp has the advantages that the wedge-shaped frame is arranged at the bottom of the hanging plate frame, the wedge-shaped block is fixedly arranged on the wedge-shaped frame, the function of preliminarily fixing the cable wire by the tension clamp can be realized through the matching of the wedge-shaped block and the wedge-shaped shell, namely when the tension clamp clamps and fastens the cable wire, the preliminary tensioning of the cable wire is realized through the clamping of the wedge-shaped block and the opening of the wedge-shaped shell, and the tensioning and fixing function of the traditional tension clamp on the cable wire is realized. After the effort increase that strain clamp received, the wedge struts the opening part of wedge casing, and the wedge casing roll-off and the downstream are gone up from the wedge to the wedge, play the cushioning effect to the cable conductor, is provided with anticreep piece on the wedge casing simultaneously, makes the wedge casing move down after the certain distance through the cooperation of anticreep piece and spacing hole and stop moving to realize the clamp tight to the cable conductor through the cooperation of wedge and wedge casing, ensure the reliability of the tight wire of clamp of double wedge strain clamp. The structure of the tension clamp is simple, double clamping fixing and buffering of the lead can be realized, the clamping fixing of the cable is avoided when the traditional tension clamp is close to the self strength, and the cable is easy to damage when the acting force exerted on the tension clamp by the cable is large and cannot play a role in secondary protection. Compared with the traditional strain clamp, the strain clamp has secondary protection capability, can effectively reduce the production process requirement of the strain clamp, and reduces the enterprise cost.

Drawings

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

FIG. 2 is a state diagram of the present invention in use;

FIG. 3 is a schematic view of the installation of the wedge housing of the present invention;

FIG. 4 is a schematic structural view of a wedge housing of the present invention;

FIG. 5 is a schematic structural view of a wedge frame of the present invention;

FIG. 6 is a schematic view of the wedge of the present invention.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

The utility model provides a two wedge strain clamp, includes hanger frame 1, wedge casing 2, wedge 5 and wedge frame 4, wherein wedge 5 includes left fastener 6.1 and right fastener 6.2, and left fastener 6.1, right fastener 6.2 all are provided with the recess 6.7 that is used for placing the cable, are provided with anti-skidding line 6.8 in the recess 6.7, reduce the slip of wire when being convenient for press from both sides tight cable. The wedge-shaped shell 2 is internally provided with a wedge-shaped mounting cavity 3 matched with the wedge-shaped piece 5, and the wedge-shaped piece 5 is sleeved in the wedge-shaped mounting cavity 3. Above-mentioned wedge frame 4 sets up the lower tip at hanger frame 1 through the bolt fastening, and the homogeneous body fastening in both sides of wedge casing 2 is provided with anticreep piece 2.2, and hanger frame 1 is provided with along its length direction with the spacing hole 7 that anticreep piece 2.2 is corresponding, and anticreep piece 2.2 nestification is in spacing hole 7, and wherein anticreep piece 2.2 is cylindrical and carries on spacingly through the split pin, avoids anticreep piece 2.2 from spacing downthehole roll-off 7. The middle part of terminal surface is provided with wedge 4.2 before the above-mentioned wedge frame 4, wedge 4.2's width from the top is crescent, form wedge spout 4.3 between wedge 4.2 and the lateral wall of wedge frame 4, wedge spout 4.3's width from the top reduces gradually, wedge casing 2 is provided with and slides 4.3 matched with wedge board 2.3 with wedge, wedge frame 4 still is provided with and is used for restricting 2.3 gliding limiting plate 4.5 along the wedge spout of wedge board, the integrative fixed lower part that sets up at 2 rear end faces of wedge casing of wedge board 2.3, wedge board 2.3 is from the top downwards width crescent, the rear end face of wedge casing 2 is provided with the opening along its length direction simultaneously, and the opening is located 2.3's middle part, make wedge installation cavity 3 be the C type. And be provided with a plurality of brace rods 2.1 on the wedge casing 2, the brace rod 2.1 encircles and is established in the outside of wedge casing 2, and a plurality of brace rods 2.1 along the length direction evenly distributed of wedge casing 2, play the effect of casing reinforcement, the outside ring of wedge frame 4 is equipped with strengthening rib 4.1 simultaneously. Wherein limiting plate 4.5 is fixed with wedge frame 4's lateral wall an organic whole, and limiting plate 4.5's front end an organic whole is fixed and is provided with fixed plate 4.4, and fixed plate 4.4 is fixed with wedge frame 4's lateral wall an organic whole.

The wedge block 4.2 extends into the opening of the wedge shell 2, the upper end portion of the wedge 5 is provided with a limiting member 6 for preventing the wedge 5 from slipping out of the wedge shell 2, and the limiting member 6 and the wedge block 4.2 are arranged in alignment to avoid the wedge 5 from slipping out of the installation cavity. The limiting part 6 comprises a left limiting block 6.3 arranged on the left wire clamp 6.1 and a right limiting block 6.4 arranged on the right wire clamp 6.2, the left limiting block 6.3 is integrally and fixedly provided with a transverse lug 6.5, the right limiting block 6.4 is provided with a fixing hole corresponding to the lug 6.5, and the lug 6.5 is embedded in the fixing hole; thereby make wedge 5 when using, when compressing tightly the cable promptly, make left fastener 6.1 and right fastener 6.2 be close to each other under wedge casing 2's effect, and synchronous downstream, avoid appearing the phenomenon that left fastener 6.1 and right fastener 6.2 misplaced each other, lead to wedge 5 can't reliably compress tightly the cable.

The working process of the invention is as follows: the opening that the wedge board 2.3 card of wedge casing 2 was in wedge 4.2 counterbalance after the equipment was accomplished, realizes the wedge block, presss from both sides tight cable conductor through left fastener 6.1 and right fastener 6.2 simultaneously to install wedge 5 in wedge installation cavity 3. Taut cable conductor during the use, wedge 5 moves down at this moment mutually and presss from both sides tight cable conductor under wedge casing 2's effect, and wedge 4.2 that set up simultaneously plays the supporting role at wedge casing 2's opening part, and wedge frame 4 is fixed mutually with the hanger line this moment and utilizes wedge frame 4 to support and realize preliminary cable conductor taut fixedly. When strain clamp is in the complex environment, when the effort that the cable conductor applyed on wedge 5 takes place the sudden change promptly, wedge casing 2 moves down under the effect of effort, and simultaneously anticreep piece 2.2 moves down along spacing hole 7 in step, and wedge 4.2 struts wedge casing 2 at the opening part of wedge casing 2 this moment and continues to move down and utilize the tensile resistance performance of the intensity increase strain clamp of wedge casing 2 self. When the effort that the cable conductor was applyed is great, wedge 4.2 strut wedge casing 2 and wedge casing 2 follows wedge frame 4 roll-off, and wedge casing 2 downstream this moment plays the pressure that applies the cable conductor and carries out cushioning effect, and anticreep spare 2.2 avoids wedge casing 2 to continue downstream with link plate frame 1 counterbalance simultaneously. At this moment at wedge casing 2 and the 1 interact of link plate frame, when the cable conductor continues to exert pressure, the cable conductor pulling wedge 5 continues to move down and applys bigger interact power to wedge frame 4 under wedge casing 2's effect and presss from both sides tightly the cable conductor, ensures the reliability of strain clamp, prevents that the cable conductor from slipping on directly following strain clamp to reduce the occurence of failure.

The above-mentioned embodiments are only preferred embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention.

Claims

1. A double-wedge strain clamp comprises a hanger frame, a wedge shell and wedges, and is characterized by also comprising a wedge frame, the wedge shell is internally provided with a wedge mounting cavity matched with the wedge piece, the wedge piece is arranged in the wedge mounting cavity, the wedge-shaped frame is arranged at the lower end part of the hanging plate frame, a wedge-shaped block is arranged in the middle of the front end surface of the wedge-shaped frame, a wedge-shaped sliding groove is formed between the wedge-shaped block and the side wall of the wedge-shaped frame, the wedge-shaped shell is provided with a wedge-shaped plate matched with the wedge-shaped sliding groove, the wedge-shaped frame is also provided with a limiting plate for limiting the sliding of the wedge-shaped plate along the wedge-shaped groove, the wedge-shaped shell is provided with an anti-falling part, the hanging plate frame is provided with a limiting hole corresponding to the anti-falling piece along the length direction of the hanging plate frame, and the anti-falling piece is nested in the limiting hole.

2. The dual-wedge strain clamp of claim 1, wherein the wedge plate is integrally and fixedly disposed at a lower portion of a rear end surface of the wedge housing, the width of the wedge plate gradually increases from top to bottom, the rear end surface of the wedge housing is provided with an opening along a length direction thereof, and the opening is located at a middle portion of the wedge plate.

3. The double-wedge strain clamp of claim 2, wherein the wedge-shaped housing has a plurality of support ribs disposed thereon, the support ribs are disposed around the wedge-shaped housing, and the plurality of support ribs are uniformly distributed along the length of the wedge-shaped housing.

4. The double wedge strain clamp of claim 2, wherein the wedge block extends into the opening of the wedge housing, and wherein the upper end of the wedge block is provided with a stop for preventing the wedge block from sliding out of the wedge housing, the stop being disposed opposite the wedge block.

5. The dual wedge strain clamp of claim 1, wherein the wedge block has a width that increases from top to bottom and the wedge runner has a width that decreases from top to bottom.

6. The double wedge strain clamp of claim 1, wherein the wedge frame has reinforcing ribs disposed around the outside thereof.

7. The double-wedge strain clamp of claim 1, wherein the limiting plate is integrally fixed to the side wall of the wedge frame, and a fixing plate is integrally fixed to the front end of the limiting plate and integrally fixed to the side wall of the wedge frame.

8. The double-wedge strain clamp of claim 4, wherein the wedge comprises a left clamp and a right clamp, the left clamp and the right clamp are both provided with grooves for placing cables, and the grooves are internally provided with anti-slip lines.

9. The double-wedge strain clamp of claim 8, wherein the limiting member comprises a left limiting member disposed on the left clamp and a right limiting member disposed on the right clamp, the left limiting member is integrally and fixedly provided with a transverse protrusion, the right limiting member is provided with a fixing hole corresponding to the protrusion, and the protrusion is embedded in the fixing hole.

10. The double-wedge strain clamp of claim 1, wherein anti-dropping members are integrally and fixedly arranged on both sides of the wedge-shaped housing, and the wedge-shaped frame is fixedly arranged at the lower end of the hanging plate frame through bolts.