CN105762719B - Device for dead earth cable - Google Patents

Abstract

The invention discloses a device for fixing grounding cables, which belongs to the technical field of electric appliances, and comprises a main hoop matched with the main cable and a secondary hoop matched with the grounding cable. The main hoop and the sub hoop are connected through a The device is connected; the main hoop includes an upper hoop body and a lower hoop body that are connected together, and the main hoop is provided with a wire hole that cooperates with the main cable; the secondary hoop includes an upper hoop that is mated and connected together. The hoop piece and the lower hoop piece, and the auxiliary hoop is provided with a threading hole for matching with the grounding cable. The device for fixing the grounding cable provided by the present invention has a simple overall structure and a reasonable design. The grounding cable is connected to the main cable through the main hoop, the secondary hoop and the connecting device, which greatly improves the installation stability of the grounding cable. A spring is set on the connecting rod, and the spring has the characteristic of automatic recovery, which can eliminate the thermal creep between the main hoop and the auxiliary hoop, and realize a flexible connection between the auxiliary hoop and the main hoop.

Description

Devices for securing grounding cables

technical field

The invention relates to the technical field of electric appliances, in particular to a device for fixing grounding cables.

Background technique

With the development of social economy, in order to improve the power supply quality of the power grid, improve the environmental conditions, and make effective use of land resources, more overhead lines have been transformed into power cables. During the transformation and construction, a large number of terminal towers were added, and the increase of terminal towers put forward different requirements for operation, maintenance and overhaul. The fixing of the grounding cable in the existing cable terminal tower is usually directly wound on the main cable with adhesive tape. Due to natural reasons and the quality of the fixing tape, the adhesive tape for fixing the grounding cable will be damaged or broken, causing the grounding cable to be separated from the main cable. Hanging in the hole or on the terminal tower will bring potential safety hazards to the operation of the power cable and fail to meet the requirements of the power construction process. Simultaneously, the workload of maintenance operation is increased, and the economic waste caused is relatively large.

Contents of the invention

In order to solve the shortcomings and deficiencies of the above-mentioned prior art, the present invention provides a device for fixing the grounding cable, which is convenient for fixing and installing the grounding cable on the main cable.

In order to achieve the above technical purpose, the device for fixing the grounding cable provided by the present invention includes a main hoop matched with the main cable and a secondary hoop matched with the grounding cable, the main hoop and the sub hoop are connected by a connecting device ; The main hoop includes an upper hoop body and a lower hoop body that are mated and connected together, and the main hoop is provided with a wire hole that cooperates with the main cable; the secondary hoop includes an upper hoop piece that is mated and connected together And the lower hoop piece, and the secondary hoop is provided with a threading hole for matching with the grounding cable.

The wire hole on the main hoop is matched with the main cable, the threading hole on the auxiliary hoop is matched with the grounding cable, and the auxiliary hoop is connected to the main hoop through the connecting device, thereby connecting the grounding cable to the main cable.

Preferably, the connecting device includes a connecting rod, the main hoop is provided with a through hole matching the connecting rod, the auxiliary hoop is provided with a mounting hole matching the connecting rod, and one end of the connecting rod is connected to the main hoop through the through hole. As for the hoop, the other end of the connecting rod cooperates with the mounting hole and is connected to the secondary hoop.

Preferably, a spring is sleeved on the connecting rod, and the two ends of the spring abut against the main hoop and the auxiliary hoop respectively.

The spring is set on the connecting rod, and the two ends of the spring are against the main hoop and the auxiliary hoop respectively. The spring has the characteristics of deformation after being stressed and automatic recovery when no force is applied, which can eliminate the connecting rod, main hoop and auxiliary hoop. The thermal creep between the auxiliary hoops makes the whole device not easily deformed, which effectively guarantees the overall service life of the device.

Preferably, the upper hoop body and the lower hoop body are respectively provided with an upper protrusion and a lower protrusion protruding outward on the side parallel to the axial direction of the connecting rod, and the extension direction of the upper protrusion and the lower protrusion The protruding direction is consistent with the axial direction of the main cable. The upper and lower bumps are provided with through holes for matching with the connecting rod; It also includes an upper nut matched with the threaded rod, the upper nut is tightened on the other end of the threaded rod and leans against the side of the upper bump facing away from the lower bump, and one end of the spring leans against the side of the lower bump facing away from the upper bump .

The main hoop is fixedly connected together through the cooperation of the upper nut and the threaded rod, the connection method is simple and the connection is firm. Further, in order to facilitate the staff to tighten the nuts by hand, the upper nuts may be wing nuts.

Preferably, there are two connecting rods and they are arranged symmetrically on both sides of the wire-through hole, and there are two upper bumps and two lower bumps respectively and they are symmetrically arranged on both sides of the wire-through hole.

There are two connecting rods, upper bumps and lower bumps, each of which is arranged symmetrically, which is convenient for improving the overall bearing strength of the device, improving the connection strength between the grounding cable and the main cable, and ensuring the electrical process requirements. In addition, the three are arranged symmetrically, which can make the overall force of the device more balanced.

Preferably, one of the upper protrusions is provided with a through hole, and the other upper protrusion is provided with a first opening slot matched with the connecting rod, and the length direction of the first opening slot is consistent with the protruding direction of the upper protrusion The inner wall of one side in the length direction of the first opening groove is provided with a protruding limiting part, and the distance between the end of the limiting part facing the center of the first opening groove and the inner wall of the other side in the length direction of the first opening groove is greater than that of the threaded rod The minor diameter is smaller than the major diameter of the threaded rod.

The first opening groove is set on the other upper bump. When installing, the upper hoop body is sleeved on the connecting rod through the through hole on the upper bump on one side and never breaks away from the connecting rod. Loosen the upper nut to make the upper hoop body The distance between the hoop and the lower hoop is slightly larger than the diameter of the main cable. After snapping the main cable into the wire hole, turn the upper hoop body so that the first opening groove on the upper bump fits into the connecting rod, and then tighten the nuts on both sides. It is easy to install, and during the installation process, the upper nut and the upper The hoop body is always set on the connecting rod, and the staff do not have to worry about problems such as falling parts during installation, which is convenient for operation. As a preference, a limit ring can be placed at the end of the threaded rod to further prevent the upper nut from spinning away from the threaded rod during installation.

Preferably, the upper hoop piece includes an arc-shaped upper arc-shaped clamping part and a fixing part provided on both sides of the upper arc-shaped clamping part and integrated with the upper arc-shaped clamping part, and the installation hole is set On the fixed part; the lower hoop piece includes an arc-shaped lower arc clamping part and connecting parts arranged on both sides of the lower arc clamping part, and the upper arc clamping part and the lower arc clamping part are combined Form a threading hole; the upper hoop and the lower hoop are connected together by bolts and lock nuts that match the bolts, and the fixing part of the upper hoop and the connecting part of the lower hoop are respectively equipped with upper connections that match the bolts hole and the lower connecting hole, and the upper connecting hole is closer to the upper arc-shaped clamping portion than the mounting hole, and the length of the connecting portion is shorter than that of the fixing portion.

The part where the upper hoop piece and the lower hoop piece cooperate with the grounding cable is made into an arc shape, which is convenient for reducing the thickness of the upper hoop piece and the lower hoop piece, thereby reducing the overall weight of the device and reducing the load bearing of the main cable. The upper hoop piece and the lower hoop piece are connected together by bolts and nuts matched with the bolts. The connection structure is simple and the installation is convenient.

Preferably, the lower connecting hole on the connecting part on one side of the lower hoop is a second open slot, and the length direction of the second open slot is consistent with the length direction of the grounding cable; There is a first protruding part, and the distance between the end of the first protruding part toward the center of the second opening slot and the inner wall on the other side in the length direction of the second opening slot is greater than the minor diameter of the bolt and smaller than the major diameter of the bolt.

Set the lower connecting hole on the connecting part of the lower hoop as a second open slot. When the secondary hoop is connected to the grounding cable, loosen the lock nut so that the distance between the lower hoop and the upper hoop is slightly greater than the grounding cable. The diameter of the cable, clamp the grounding cable into the threading hole, turn the lower hoop until the bolt fits into the second opening slot, and then tighten the lock nuts on both sides to complete the installation of the auxiliary hoop and the grounding cable. During the installation process, the lock nut and the lower hoop are always set under the bolt, which is convenient for the installation personnel or maintenance personnel to operate, and the parts are not easy to be lost or dropped.

Preferably, the lower arc-shaped clamping part is integrated with one side of the connecting part, and the other side of the connecting part independently forms a tongue, and one end of the tongue and the end of the lower arc-shaped clamping part facing away from the connecting part are hinged by a pin Together, the connecting part is provided with a third open slot, and the length direction of the third opening slot is perpendicular to the length direction of the grounding cable and consistent with the length direction of the connecting part protruding from the lower arc-shaped clamping part.

Set the lower hoop piece into a split structure, and complete the tightening of one lock nut during installation. When installing, tighten the locking nut used to fix the tongue, unscrew the locking nut on the other side, turn the lower arc clamping part to make the threading hole open, insert the grounding cable into the threading hole, and turn the lower arc The third opening slot on the connecting part is clamped on the bolt by the shape clamping part, and then the other locking nut is tightened to complete the connection between the grounding cable and the secondary hoop, which is convenient for installation personnel or maintenance personnel to operate.

Preferably, a second protrusion is provided on one inner wall in the length direction of the third opening groove, and there is a gap between the end of the second protrusion facing the center of the third opening groove and the inner wall on the other side in the length direction of the third opening groove. The distance is greater than the minor diameter of the bolt and less than the major diameter of the bolt.

The second protruding part is arranged on the inner wall of the third opening groove, so that the connecting part is always stuck on the bolt before the lock nut is tightened, which is convenient for electric workers to complete the operation with one hand.

The device for fixing the grounding cable provided by the present invention has a simple overall structure and a reasonable design. The grounding cable is connected to the main cable through the main hoop, the secondary hoop and the connecting device, which greatly improves the installation stability of the grounding cable. A spring is set on the connecting rod, and the spring has the characteristic of automatic recovery, which can eliminate the thermal creep between the main hoop and the auxiliary hoop, and realize a flexible connection between the auxiliary hoop and the main hoop.

Set the first opening groove on the upper protrusion on the side of the upper hoop body, set the second opening groove on the connecting part of the lower hoop piece side, or set the lower hoop piece in a split structure and set the third opening groove on the connecting part, The installation steps of the main hoop and the auxiliary hoop can be simplified, the time required for completing the installation can be shortened, and the installation efficiency and work safety can be greatly improved.

A stopper is provided on the inner wall of one side of the first opening groove, a first protrusion is arranged on the inner wall of one side of the second opening groove and a second protrusion is arranged on the inner wall of one side of the third opening groove, and the connecting rod After being snapped into the first opening slot, the bolts are not easy to disengage after being snapped into the second or third opening slot, and the pre-connection is firm, which is convenient for the staff to complete the installation work smoothly.

Description of drawings

Fig. 1 is the schematic diagram when the embodiment of the device for fixing the grounding cable of the present invention cooperates with the main cable and the grounding cable;

Fig. 2 is the overall structure schematic diagram of the embodiment of the device for fixing the grounding cable of the present invention;

Fig. 3 is a schematic structural view of the auxiliary hoop in the embodiment of the device for fixing the grounding cable of the present invention;

Fig. 4 is a structural schematic diagram of the cooperation between the main hoop and the connecting rod in the embodiment of the device for fixing the grounding cable of the present invention;

Fig. 5 is a schematic structural view of the upper hoop in the embodiment of the device for fixing the grounding cable of the present invention;

Fig. 6 is a structural schematic diagram of the upper hoop piece in the embodiment of the device for fixing the grounding cable of the present invention;

Fig. 7 is a structural schematic diagram of the lower hoop piece in the embodiment of the device for fixing the grounding cable of the present invention;

Fig. 8 is another structural schematic diagram of the lower hoop piece in the embodiment of the device for fixing the grounding cable of the present invention.

In the figure, 1-main cable, 2-grounding cable, 3-main hoop, 31-upper hoop body, 311-upper bump, 312-first opening slot, 313-limiting part, 314-upper recess, 32 -Lower hoop body, 321-lower bump, 322-lower recess, 33-through hole, 34-through hole, 4-pair hoop, 41-upper hoop piece, 411-upper arc clamping part, 412- Fixed part, 413-upper connecting hole, 42-lower hoop, 421-lower arc clamping part, 422-connecting part, 423-lower connecting hole, 424-second opening slot, 425-first protruding part, 426-the third opening slot, 427-the second protrusion, 43-threading hole, 44-installation hole, 45-bolt, 46-lock nut, 47-tongue, 48-pin shaft, 5-connection device, 51-connecting rod, 511-threaded rod, 52-spring, 53-nut, 6-elastic pad.

detailed description

The present invention will be further described below in conjunction with accompanying drawing.

As shown in Figures 1 and 2, the embodiment of the present invention provides a device for fixing grounding cables, including a main hoop 3 cooperating with the main cable 1 and a secondary hoop 4 cooperating with the grounding cable 2, the main hoop 3 and the sub hoop The hoops 4 are connected by a connecting device 5 , and the connecting device 5 includes a connecting rod 51 and a spring 52 sleeved on the connecting rod 51 .

The main hoop 3 includes an upper hoop body 31 and a lower hoop body 32 that are mated and connected together. The upper hoop body 31 is provided with an upper concave portion 314 in the middle of the side facing the lower hoop body 32, and the lower hoop body 32 is positioned toward the upper hoop body. A lower concave portion 322 is provided in the middle of one side of 31 , and the combination of the upper concave portion 314 and the lower concave portion 322 forms a wire hole 33 for matching with the main cable 1 .

As shown in Figure 3, the secondary hoop 4 includes an upper hoop piece 41 and a lower hoop piece 42 that are fitted together. The fixing part 412 is provided on both sides of the part 411 and is integrated with the upper arc-shaped clamping part 411 . The lower hoop piece 42 includes an arc-shaped lower arc-shaped clamping portion 421 and connecting portions 422 disposed on two sides of the lower arc-shaped clamping portion 421 . When the upper hoop piece 41 cooperates with the lower hoop piece 42 , the upper arc-shaped clamping portion 411 and the lower arc-shaped clamping portion 412 are combined to form a threading hole 43 matched with the grounding cable 2 . The upper hoop piece 41 and the lower hoop piece 42 are connected together by bolts 45 and lock nuts 46 that cooperate with each other.

In order to reduce the overall weight of the device, the main hoop 3 and the auxiliary hoop 4 are made of aluminum. In order to avoid wear and tear on the main cable 1 and the grounding cable 2 caused by the main hoop 3 and the secondary hoop 4 during installation, elastic pads 6 are fixed on the curved inner walls of the wire hole 33 and the wire hole 43 . Further, the elastic pad 6 is a rubber pad.

In order to improve the strength of the connection between the main hoop 3 and the auxiliary hoop 4 so as to make the grounding cable 2 more securely connected to the main cable 1 , in this embodiment, there are two connecting rods 51 and two springs 52 . Correspondingly, the main hoop 3 is symmetrically provided with through holes 34 respectively matched with the two connecting rods 51 , and the auxiliary hoop 4 is symmetrically provided with mounting holes 44 respectively matched with the two connecting rods 51 . The top of the connecting rod 51 is connected to the main hoop 3, the bottom of the connecting rod 51 is connected to the auxiliary hoop 4, and the two ends of the spring 52 respectively lean against the main hoop 3 and the auxiliary hoop 4, and the connecting rod 51 and the main hoop 3 The matching part is a threaded rod 511 , and the connection device 5 further includes an upper nut 53 matched with the threaded rod 511 .

In the first structure of the main hoop 3, the left and right sides of the upper hoop body 31 and the left and right sides of the lower hoop body 32 are symmetrically provided with a through hole 34 that cooperates with the connecting rod 51, and the through hole 34 is located in the wire hole 33 on both sides.

During installation, the threaded rod 511 passes upwardly through the through hole 34 on the lower hoop body 32 and the through hole 34 on the upper hoop body 31, the upper nut 53 is tightened on the threaded rod 511 and the bottom surface of the upper nut 53 leans against the upper hoop body 31 top surface. After the installation is completed, the spring 52 is in a compressed state and the top end of the spring 52 abuts against the bottom surface of the lower hoop body 32 .

In the second structure of the main hoop 3 shown in Figure 4, in order to reduce the thickness of the upper hoop 31 and the lower hoop 32, and then reduce the weight of the main hoop 3, the upper hoop 31 and the lower hoop 32 An upper protrusion 311 and a lower protrusion 321 protruding outward are respectively provided on one side parallel to the axial direction of the connecting rod 51, and the extension direction of the upper protrusion 311 and the extension direction of the lower protrusion 321 are consistent and consistent with The axial direction of the main cable 1 is consistent, and the upper protrusion 311 and the lower protrusion 321 are provided with through holes 34 .

During installation, the threaded rod 511 passes through the through hole 34 on the lower bump 311 and the through hole 34 on the lower bump 321 upwards, the upper nut 53 is tightened on the threaded rod 511 and the bottom surface of the upper nut 53 is against the upper bump 311 on top. After the installation is completed, the spring 52 is in a compressed state and the top end of the spring 52 abuts against the lower surface of the lower protrusion 321 .

In the third structure of the main hoop 3 shown in FIG. 5 , the upper hoop body 31 in the second structure of the main hoop 3 is improved. One upper protrusion 311 is provided with a through hole 34, and the other upper protrusion 311 is provided with a first opening groove 312 that cooperates with the connecting rod 51. unanimous. Preferably, the first opening groove 312 is a U-shaped groove. The inner wall on one side of the length direction of the first opening groove 312 is provided with a protruding stopper 313, and the stopper portion 313 faces the distance between the end of the center of the first opening groove 312 and the inner wall on the other side of the length direction of the first opening groove 312. The distance is greater than the minor diameter of the threaded rod 511 and smaller than the major diameter of the threaded rod 511 .

During installation, loosen the upper nut 53, move the upper hoop body 31 so that the distance between the upper hoop body 31 and the lower hoop body 32 is greater than the diameter of the main cable 1, insert the main cable 1 into the wire hole 33, and turn the upper hoop The body 31 makes the connecting rod 51 snap into the first opening groove 312, and then tighten the two upper nuts 53.

As shown in Figure 6, in the embodiment of the present invention, the fixing parts 412 on both sides of the upper hoop piece 41 are provided with mounting holes 44 that cooperate with the connecting rod 51. Hoop piece 41. The fixing portion 412 is also provided with an upper connection hole 413 for matching with the bolt 45 , and the upper connection hole 413 is closer to the upper arc-shaped clamping portion 411 than the installation hole 44 .

In order to improve the strength of the upper hoop piece 41 , reinforcing ribs are evenly provided on the outer wall of the upper arc-shaped clamping portion 411 .

In the first structure of the lower hoop piece 42 , the lower arc-shaped clamping portion 421 and the connecting portions 422 on both sides are an integral structure, and the connecting portion 422 is provided with a lower connecting hole 423 for matching with the bolt 45 .

During installation, loosen the lock nut 46, one side of the lower hoop piece 42 is separated from the bolt 45, so that the distance between the upper hoop piece 41 and the lower hoop piece 42 is greater than the diameter of the grounding cable 2, and the grounding cable 2 is clamped into the threading hole 43, then the lower hoop piece 42 is sleeved on the bolt 45 through the cooperation of the lower connecting hole 423 and the bolt 45, and finally the locking nut 46 is tightened.

In the second structure of the lower hoop piece 42 as shown in Figure 7, the lower arc-shaped clamping part 421 and the connecting parts 422 on both sides are set as an integrated structure, and the connecting part 422 on one side is provided with a lower part that cooperates with the bolt 45. The connecting hole 423 and the connecting portion 422 on the other side are provided with a second open slot 424 matching with the bolt 45 , and the length direction of the second open slot 424 is consistent with the length direction of the grounding cable 2 . Preferably, the second open slot 424 is also a U-shaped slot. A first protruding portion 425 is provided on one inner wall of the second opening groove 424 in the longitudinal direction, and between the end of the first protruding portion 425 toward the center of the second opening groove 424 and the other inner wall of the second opening groove 424 in the longitudinal direction. The distance is larger than the minor diameter of the bolt 45 and smaller than the major diameter of the bolt 45 .

During installation, unscrew the locking nut 46 so that the locking nut 46 does not break away from the bolt 45, the distance between the upper hoop piece 41 and the lower hoop piece 42 is greater than the diameter of the grounding cable 2, and the grounding cable 2 is clamped into the threading hole 43 , turn the lower hoop piece 42 so that the bolt 45 snaps into the second opening groove 424, and the connecting part 422 is located between the upper hoop piece 41 and the lock nut 46, and then tighten the lock nuts 46 on both sides to make the lower hoop piece 42 It is fixedly connected to the upper hoop piece 41 .

In the third structure of the lower hoop piece 42 as shown in Figure 8, the lower arc-shaped clamping part 421 is integrated with the connecting part 422 on one side, and the connecting part 422 on the other side forms a tongue piece 47 independently, and one end of the tongue piece 47 and Ends of the lower arc-shaped clamping portion 421 facing away from the connecting portion 422 are hinged together by a pin shaft 48 . The connecting portion 422 is provided with a third opening slot 426 , the length direction of the third opening slot 426 is perpendicular to the axial direction of the grounding cable 2 and coincides with the length direction of the connecting portion 422 protruding from the lower arc-shaped clamping portion 421 . The inner wall on one side of the third opening groove 426 in the length direction is provided with a second protruding portion 427 , and the end of the second protruding portion 427 facing the center of the third opening groove 426 is between the inner wall on the other side of the third opening groove 426 in the length direction. The distance is larger than the minor diameter of the bolt 45 and smaller than the major diameter of the bolt 45 .

During installation, tighten the lock nut 46 used to fix the side of the tongue 47, unscrew the lock nut 46 used to fix the side of the connecting part 422, turn the lower arc clamping part 421 to open the threading hole 43, and ground The cable 2 is inserted into the threading hole 43, and the lower arc-shaped clamping part 421 is rotated so that the third opening groove 426 on the connecting part 422 is stuck on the bolt 45, and then the locking nut 46 on one side for fixing the connecting part 422 is tightened. .

Among the above three structures of the lower hoop 42 , in order to prevent the lower hoop 42 from affecting the cooperation between the upper hoop 41 and the connecting rod 51 , the length of the connecting portion 422 is smaller than the length of the fixing portion 412 . After the installation is completed, the bottom end of the spring 52 abuts against the upper surface of the upper hoop piece 41 .

Any structure of the above-mentioned main hoop 3 can be matched with any structure of the auxiliary hoop 4. When installing, first clamp the main cable 1 into the wire hole 33, then tighten the upper nut 53 and make the spring 52 under compression state. Then clamp the grounding cable 2 into the threading hole 43 , and tighten the locking nut 46 so that the lower hoop piece 42 is fixedly connected to the upper hoop piece 41 . After installation, the spring 52 is in a compressed state.

In order to snap the main cable 1 into the wire hole 33 or the ground cable 2 into the wire hole 43, you only need to unscrew or spin off an upper nut 53 and a lock nut 46. After tightening, the threaded rod 511 is positioned at the protruding upper protrusion Part of the length of the block 311 is greater than the diameter of the main cable 1 , and the length of the locking bolt 45 protruding from the locking nut 46 is greater than the diameter of the grounding cable 2 .

Except above-mentioned preferred embodiment, the present invention also has other implementation modes, those skilled in the art can make various changes and distortions according to the present invention, as long as not departing from the spirit of the present invention, all should belong to the defined in the claims of the present invention scope.

Claims (3)

1. the device for dead earth cable, it is characterised in that including the main anchor ear (3) coordinated with leader cable (1) and with connecing The secondary anchor ear (4) that ground cable (2) coordinates, is connected between main anchor ear (3) and secondary anchor ear (4) by attachment means (5)；The master embraces Hoop (3) includes the upper hoop (31) and lower hoop (32) cooperated together, and main anchor ear (3) is provided with and leader cable (1) The threading hole (33) of cooperation；The secondary anchor ear (4) includes the upper hoop piece (41) cooperated together and lower hoop piece (42), and secondary Anchor ear (4) is provided with the threading hole (43) coordinated with earth cable (2)；The attachment means (5) include connecting rod (51), main anchor ear (3) through hole (34) coordinated with connecting rod (51) is provided with, secondary anchor ear (4) is provided with the mounting hole (44) coordinated with connecting rod (51), One end of connecting rod (51) is connected in main anchor ear (3) with through hole (34), and the other end and the mounting hole (44) of connecting rod (51) coordinate It is connected to secondary anchor ear (4)；The upper hoop (31) and lower hoop (32) are respectively equipped with the side axially in parallel with connecting rod (51) Outwardly directed upper protruding block (311) and lower protruding block (321), and stretching direction and the stretching of lower protruding block (321) of upper protruding block (311) Direction is consistent and identical with the axial direction of leader cable (1), and upper protruding block (311) and lower protruding block (321) are provided with through hole (34)；The company Bar (51) is threaded rod (511) with the position that upper hoop (31) is connected, and attachment means (5) also include and threaded rod (511) The top nut (53) of cooperation, top nut (53) is tightened against on threaded rod (511) and is resisted against upper protruding block (311) dorsad lower protruding block (321) side, one end of spring (52) is resisted against the side of lower protruding block (321) dorsad upper protruding block (311)；The connecting rod (51) Provided with two and be symmetricly set in the both sides of threading hole (33), upper protruding block (311) and lower protruding block (321) be also respectively equipped with two and Each it is symmetrically set in the both sides of threading hole (33)；The upper hoop piece (41) is including curved upper arc clamping section (411) and sets Integral fixed part (412), the mounting hole are set in upper arc clamping section (411) both sides and with upper arc clamping section (411) (44) on fixed part (412)；The lower hoop piece (42) is including curved arc lower clamping section (421) and located at arc lower The connecting portion (422) of clamping section (421) both sides, upper arc clamping section (411) and arc lower clamping section (421) combination form threading Hole (43)；The locking nut (46) coordinated between upper hoop piece (41) and lower hoop piece (42) by bolt (45) and with bolt (45) is even It is connected together, is respectively equipped with and bolt (45) on the connecting portion (422) of the fixed part (412) of upper hoop piece (41) and lower hoop piece (42) Coordinate upper connecting hole (413) and lower connecting hole (423), and upper connecting hole (413) compared with mounting hole (44) closer to upper arc folder Tight portion (411), the length of connecting portion (422) is less than the length of fixed part (412)；The arc lower clamping section (421) and side Connecting portion (422) is integrated, and opposite side connecting portion (422) is individually formed tongue piece (47), one end of tongue piece (47) and arc lower folder The end of tight portion (421) dorsad connecting portion (422) is hinged by bearing pin (48), and connecting portion (422) is opened provided with the 3rd Mouthful groove (426), the length direction of the 3rd open slot (426) it is vertical with the length direction of earth cable (2) and with connecting portion (422) The length direction stretched out from arc lower clamping section (421) is consistent；One of upper protruding block (311) is provided with through hole (34), Another upper protruding block (311) is provided with the first open slot (312) coordinated with connecting rod (51), the length of the first open slot (312) Direction is consistent with the stretching direction of upper protruding block (311)；The side inwall of the first open slot (312) length direction is provided with protrusion Limiting section (313), end and first open slot (312) length direction of the limiting section (313) towards the first open slot (312) center The distance between opposite side inwall is more than the path of threaded rod (511) and less than the big footpath of threaded rod (511).

2. the device according to claim 1 for dead earth cable, it is characterised in that be set with the connecting rod (51) There is spring (52), the two ends of spring (52) are born against on main anchor ear (3) and secondary anchor ear (4).

3. the device according to claim 1 for dead earth cable, it is characterised in that the 3rd open slot (426) the side inwall of length direction is provided with the second protuberance (427), the second protuberance (427) the 3rd open slot of direction (426) end at center and the distance between the 3rd open slot (426) length direction opposite side inwall are small more than bolt (45) Footpath and the big footpath for being less than bolt (45).