CN204424811U - Cable drawing head - Google Patents

Abstract

The utility model discloses a cable pulling head, which comprises a plurality of claws (1), a gear adjusting nut (2), a shaft sleeve (3), a hanging ring (5) and a connecting rod (8). One end of the shaft sleeve The gear adjusting nut is socketed, and the claws are distributed in a ring shape and arranged obliquely in the shaft sleeve and the gear adjusting nut. The claws pass through the shaft sleeve and mesh with the gear adjusting nut. The contact surface between the claws and the cable (6) It is two obliquely intersecting side contact surfaces. One end of the connecting rod passes through the gear adjusting nut and is connected to the bushing, and the other end is connected to a hanging ring. The middle part of the connecting rod is fixed with a rear stopper (4). The rear stop is conical in shape. Compared with the prior art, the utility model has the following advantages: simple structure, low manufacturing cost, reusable; applicable to different cross-sectional sizes of cables; easy to connect cables and wire ropes, and can be used for mechanical traction; easy to disassemble and install.

Description

cable puller

technical field

The utility model relates to a cable pulling device, in particular to an electric pulling head capable of protecting cables.

Background technique

In recent years, with the increasing demand for electricity in the electricity market, the number of urban and rural network reconstruction projects, and the increasing power consumption capacity, for the purpose of improving the safety of urban power supply and beautifying the city, most cities now The erection of power lines in China has gradually shifted from overhead lines to cables into the ground, which involves multi-type and large-scale cable laying work. Since most power cable laying work is carried out in trenches and pipes, and in the process of cable laying , cable pulling needs to pay attention to factors such as safety, speed, and efficiency. At present, in the pulling process of cable construction, it is generally used to simply bind the steel rope on the cable sheath or use a metal crimping tube to compress the cable end. Such a pulling head There are many problems. 1. Using binding steel ropes, because the binding is easy to loosen due to manual binding, under the strong traction force, the steel ropes are easy to slip away from the cable traction binding point, and in the process of mechanical device traction cables, the traction The speed is very fast, and the binding of the steel rope will not only seriously damage the insulation surface of the cable, but even destroy the inner core of the cable; 2. The pulling head with metal crimping tube may need to be completed in the factory, because the crimping tube has been deformed after crimping, It cannot be reused, it is a consumable product, the work efficiency is low and it is not convenient to use.

Utility model content

Aiming at the above-mentioned problems of the cable puller in the prior art, the utility model provides a cable puller with reasonable design, convenient operation, reusability, and suitable for cables of different types.

The technical solution adopted for the technical problem to be solved by the utility model is: it includes several claws, a gear adjustment nut, a shaft sleeve, a hanging ring and a connecting rod, one end of the shaft sleeve is sleeved with a gear adjustment nut, and the clamp The claws are distributed in a ring shape and arranged obliquely in the shaft sleeve and the gear adjusting nut. The claws pass through the shaft sleeve and mesh with the gear adjusting nut. The contact surfaces between the claws and the cable are two obliquely intersecting side contact surfaces. One end of the connecting rod passes through the gear adjustment nut and is connected with the axle sleeve, and the other end is connected with a hanging ring. The middle part of the connecting rod is fixed with a back stop, and the back stop is conical.

Further, a groove is provided on the contact surface between the claw and the cable.

Beneficial effects of the utility model: Compared with the prior art, the utility model has the following advantages: 1. The structure is simple, the manufacturing cost is low, and it can be used repeatedly; 2. It can be applied to different cable cross-sectional sizes; 3. It is convenient to connect cables and The pull wire can be used for mechanical traction; 4. It is easy to disassemble and install.

Description of drawings

Fig. 1 is the front view structure schematic diagram of the utility model,

Fig. 2 is the top view structure schematic diagram that the utility model has partial section,

Fig. 3 is a schematic diagram of the structure of the utility model in a left view.

In the figure, 1. Claw 2. Gear adjusting nut 3. Shaft sleeve 4. Rear gear 5. Hanging ring 6. Cable 7. Wheel wrench counterbore 8. Connecting rod 9. Protective cover 10. Groove 11. Side contact noodle.

Detailed ways

In order to enable those skilled in the art to better understand the technical solution of the utility model, the utility model will be further described in detail below in combination with specific embodiments according to the accompanying drawings.

As shown in Figures 1, 2, and 3, the cable pulling head includes several claws 1 (three in the figure, which can be adjusted appropriately according to the inner core of the cable), gear adjustment nut 2, shaft sleeve 3, hanging ring 5 and connecting rod 8. One end of the sleeve is sleeved with the gear adjustment nut (the gear adjustment nut is an bevel gear adjustment nut), and there is a wheel wrench sink hole 7 (umbrella shape, which is convenient to use the wheel wrench to turn the gear adjustment nut) on the shaft sleeve. The claws described in the embodiment are three inclined and evenly spaced (lower on the left and higher on the right), racks are provided on the claws, slots are provided on the bushing, and the claws move through the bushing (that is, the claws can move on the shaft the slotted hole in the sleeve), the claw protruding end and the cable contact surface form two intersecting side contact surfaces 11, and the opposite two contact surfaces clamp a cable, and the claw and the gear adjustment nut are matched through teeth , when the gear adjustment nut is turned, the claws can move to the left synchronously, and the side contact surface of the claws is used to contact the cable, so that the cables 6 between the claws can be clamped to each other, and the contact surface of the claws and the cable It is two obliquely intersecting side contact surfaces, the claw and the gear adjustment nut are threaded, one end of the connecting rod is connected to the bushing (connected by thread or bolt, and then covered with a protective cover 9), and the other One end is connected with a hanging ring, and the hanging ring is used to connect the steel cable of the mechanical traction device. The middle part of the connecting rod is fixed with a back stop 4, the back stop is conical, and the back stop is used to push the earth or stone protruding from the ground during the pulling process. Blocks are pushed to the sides.

Further, the shaft sleeve, the rear stopper and the connecting rod can also be integrally formed. A groove 10 is provided on the contact surface between the claw and the cable 6, which can further fix the inner core of the cable.

When in use, peel off the insulation layer at one end of the cable, insert the three inner cores between the ring-shaped claws, rotate by hand or use an umbrella-shaped wheel wrench to snap into the wheel wrench sink hole 7 and drive the gear adjustment nut , and adjust the opening and closing range of the claws according to different types of cables through the gear adjustment nut. The grooves on the contact surface between the claws and the inner core of the cable further fix the inner core on the traction head, and the mechanical traction device is fixed on the hanging ring. The steel cable is used to achieve the purpose of pulling the cable in the cable tube, so that not only the damage to the cable is small, but also the operation is simple and convenient. After field tests, it saves a lot of time compared with the cable pulling head in the prior art.

The above embodiments are only used to illustrate the technical solution of the utility model without limitation. Although the utility model has been described in detail with reference to specific embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or equivalent Replacement, without departing from the spirit and scope of the technical solutions of the present utility model, should be covered by the scope of protection of the claims of the present utility model.

Claims (2)

1. The cable pulling head is characterized in that it includes several claws (1), gear adjustment nuts (2), bushings (3), hanging rings (5) and connecting rods (8). One end is sleeved with the gear adjusting nut, and the claws are distributed in a ring shape and arranged obliquely in the shaft sleeve and the gear adjusting nut. The claws pass through the shaft sleeve and mesh with the gear adjusting nut. The contact between the claws and the cable (6) The surface is two obliquely intersecting side contact surfaces (11). One end of the connecting rod is connected to the bushing through the gear adjustment nut, and the other end is connected to a hanging ring. The middle part of the connecting rod is fixed with a rear gear (4 ), the rear gear is conical. 2. The cable pulling head according to claim 1, characterized in that: a groove (10) is provided on the side contact surface between the claw and the cable.