CN86200486U - Ground wire clip - Google Patents

Abstract

The utility model discloses a ground wire clip, relating to a line holding device which is used to provisionally drag, fix a ground wire, and make a loading and an unloading operations convenient. The utility model is provided with a jaw which grips when the traction force increases. One side of the jaw is provided with a V-shaped groove whose included angle is settled smaller than 46 DEG. The utility model preferentially recommendates that the included angle ranges from 34 DEG to 38 DEG and the other side of the jaw is provided with a solid groove or a shallow groove. The ground wire clip has the advantages of big line holding force, no wire sliding, no wire damaging, and delicate structure.

Description

Ground wire clip

The invention relates to a kind of clamping device, particularly a kind of improvement of holding the Line tool about using in the construction of power transmission and transformation line stringing.

The ground wire fixing-line device is interim tractive in the power transmission and transformation line construction, fixing ground wire and be convenient to a kind of the Line tool of holding of charge and discharge operations.Its structure is different, but one pair of jaw that gradually ground wire is tightened with the increase of direction of draw pulling force is all arranged.

In the power transmission and transformation line engineering, select for use diameter is less, hardness is higher galvanized strand wires usually as lightning conducter (being commonly called as ground wire).In stringing construction, often require traction force to ground wire up to several ten thousand newton, under big like this external force effect, this thin hard and smooth ground wire is easy to skid off from the conductor clamp mouth, thus normally the carrying out of influence construction.In order to solve the slip problem, prior art has been done multiple improvement to the jaw form, attempts to increase the grip of jaw to ground wire.Fig. 1, Fig. 2, Fig. 3 are the cross sections of the normal several jaws that adopt in the prior art, and they represent following three kinds of jaw forms respectively: 1. both sides all are the garden deep-slotted chip breakers; 2. be the garden deep-slotted chip breaker on one side, another side is an angle greater than 60 ° V-shaped groove; 3. both sides all are angles greater than 70 ° V-shaped groove.In addition, nearly all at the many tooth lines of the Surface Machining of above-mentioned jaw, to increase the frictional force between jaw surface and the ground wire.Though above measure can improve the slip phenomenon of fixing-line device to some extent, but still fails to deal with problems at all.Deep-slotted chip breaker has just increased the contact area with ground wire, but its Wo Li And does not have increase; Though V-shaped groove can increase the grip of jaw, in order to reach rated load, between the two pincers pieces the bigger stroke that closes up need be arranged, lose the line ability of holding thereby cause two pincers pieces to be collided easily.Collide for fear of the pincers piece, the angle in the prior art between the V-shaped groove both sides must be sufficiently big.For example the V-arrangement angle must be greater than 60 ° among Fig. 2, and the V-arrangement angle must be greater than 70 ° among Fig. 3.Therefore, the increase of V-shaped groove grip has been subjected to the restriction of angle.Though jaw Surface Machining tooth line can increase frictional force, because nipper pressure is big, the tooth line very easily is worn and ineffective, and the easy damaged ground wire.In view of the foregoing, how to solve the thorny difficult problem that the slip problem becomes this technology all the time.

The objective of the invention is, improve the jaw of the fixing-line device that uses in the prior art, make it under equal external force effect, ground wire is produced maximum grip, avoid producing the slip phenomenon.

Solution of the present invention is, opens an angle less than 46 ° V-shaped groove on fixing-line device jaw pincers piece on one side, and its bottom land can be the end of arcuate bottom, flat or other Any shape, and the pincers piece of another side is not slotted or opened shallow slot.Fig. 4 represents a kind of cross section of fixing-line device jaw of the present invention.

According to mechanical analysis, establishing Ni is ground wire each normal reaction to jaw.P is the pressure of pincers piece to ground wire.The Ni=P of garden arc vice jaw then, V-arrangement jaw Ni is relevant with angle, and angle is more little, and Ni is big more.Characterize the intensity of variation of various jaws to the ground wire grip with E=(∑ Ni)/(P), the E value is big more, and then grip is big more.If the angle of V-shaped groove is 60 ° among Fig. 2, two V-shaped groove angles are 70 ° all among Fig. 3, and the angle of V-shaped groove is 38 ° among Fig. 4, and then the calculated value of Fig. 1～Fig. 4 jaw E is respectively 2.00,3.00,3.49,4.08.This shows, under equal external force, the grip maximum of jaw of the present invention.

Adopt the conductor clamp mouth of fixing-line device of the present invention, neither can collide between the pincers piece, can produce maximum grip again, solve the disadvantage of existing all kinds of ground wire fixing-line device slips and damage ground wire, in the structure that does not change original fixing-line device with do not increase under the situation of each part dimension, improved its bearing capacity.

The design of V-shaped groove it should be noted that its angle can not get for a short time arbitrarily among the present invention, and the too small ground wire that not only can make is stuck in groove, causes line taking difficulty ， And to cause ground wire excessive and two pincers pieces are collided to the displacement of bottom land direction down in working order.Consider above factor, it is 34 °～38 ° that the present invention preferentially recommends angle.

Fig. 5 is an embodiment of ground wire fixing-line device of the present invention.The higher metal material of intensity is all adopted in draw ring (1), torque arm (2), principal arm (6), body (3) and pincers piece (7), (8).Have a garden arc track groove (5) and a straight rail groove (4) that allows torque arm one end do and to slide that makes the pincers piece do translation on the body.Ground wire is stuck in the jaw that forms between pincers piece (8) and the pincers pieces (7), and the card line face of pincers pieces (8) is the plane, and the card line face of pincers pieces (7) is that the both sides angle is 36 ° a V-shaped groove, and bottom land is an arc.More than each parts all adopt forging or machine work to be shaped, connect with pin between each parts.When the pin that is connected with torque arm (2) when draw ring (1) is in the left end extreme position of straight rail groove (4), two pincers piece opening maximums, at this moment line releasably.When tension when draw ring (1) is gone up, the pin that connects draw ring and torque arm (2) moves right along straight rail thereupon, drives principal arm (6) two pincers pieces are closed up gradually, until jaw chucking ground wire, finishes the card lineman and makes process.

Jaw E value can reach 4.23 in this example.

Claims (3)

1, a kind of ground wire fixing-line device has one pair of jaw that is used to the card line that tightens gradually with the increase of direction of draw pulling force, it is characterized in that the V-shaped groove in one side of jaw, and this groove cross section both sides angle is less than 46 °.

2, by the described ground wire fixing-line device of claim 1, it is characterized in that V-shaped groove both sides angle is 34 °-38 °.

3,, it is characterized in that the end of V-shaped groove can be the end of arc, flat or other Any shape by claim 1 or 2 described ground wire fixing-line devices.

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