CN105811322A - Traction connector used in cable laying - Google Patents

Abstract

The invention relates to a traction head for cable laying, which comprises a hollow traction head body, the traction head body has a smooth surface shape, one end of the traction head body is provided with a lead hole, and the other end of the traction head body is provided with a tubular locking end. The end is also provided with a locking structure for clamping the cable head in the locking end tube. Its locking structure can clamp the cable head in the locking end tube, which can be easily connected with the cable head. When the lead hole is connected with the traction rope, no knots are left on the outside. The traction head body has a smooth surface, and when passing through complex environments, Not prone to jamming.

Description

cable laying head

technical field

The invention relates to cable laying construction, in particular to a pulling head for passing cables through bridge frames and cable pipes.

Background technique

For cable laying construction, it is necessary to pass cables through bridges, cable ducts, or various cable channels. The current common method is to use iron wire or rope to bind the cable head, and pull the iron wire or rope to pull the cable through the above-mentioned area.

However, at the turns of cable ducts, trapezoidal bridges or narrow gaps, due to the bundled knots at the cable heads, it is easy to cause the cables to be stuck and pulled, and the remedial work requires a lot of labor and time. In severe cases, the cable itself may be damaged or other cables in the pipeline may be cut, posing a safety risk.

Contents of the invention

The technical problem to be solved by the present invention is: to provide a cable laying traction head, which can be conveniently connected with the cable head, and is not easy to be jammed when the traction cable passes through a complex environment.

The technical solution adopted by the present invention to solve its technical problems is:

The cable laying tractor includes a hollow tractor body, the tractor body has a smooth surface shape, one end of the tractor body is provided with a lead hole, the other end of the traction body is provided with a tubular locking end, and the locking end is also provided with a There is a locking structure for clamping the cable end in the locking end tube.

Further, the locking structure includes: the locking end is provided with a slit parallel to the axial direction, and also includes a nut, the nut is threadedly engaged with the locking end and is tightly attached to the end of the traction head body, the traction head The size of the end surface of the body close to the nut is larger than the size of the end surface of the nut, and the nut and the locking end are also provided with a tapered structure for pressing the locking end.

Further, the tapered structure is as follows: the locking end is conical tubular, and the large diameter end is close to the traction head body; the threaded hole of the nut is in the form of a cylindrical hole, and the inner diameter of the threaded hole of the nut is smaller than Tapered tubular large diameter end at locking end.

Further, the tapered structure is as follows: the locking end is cylindrical and tubular, the threaded hole of the nut is in the shape of a tapered hole, and the large diameter end is close to the traction head body, and the inner diameter of the small diameter end is smaller than that of the lock Cylindrical tubing with tight ends.

Further, the tapered structure is as follows: the locking end is in the shape of a conical tube, and the large-diameter end is close to the main body of the pulling head; the shape of the threaded hole of the nut is adapted to the tapered tubular shape of the locking end.

Further, the main body of the pulling head is shuttle-shaped or olive-shaped, and the lead hole is located at the tip of the shuttle-shaped or olive-shaped.

Further, the inner wall of the locking end is provided with a snapping structure.

Further, the snapping structure is an internal thread.

Further, the lumen at the locking end is a cylindrical lumen; the split end is provided with a circular hole.

Further, a clamping port for tool clamping is also provided on the surface of the tractor head body at a position between the maximum peripheral dimension of the tractor head body and the nut.

The beneficial effects of the present invention are: the cable laying traction head, its locking structure can clamp the cable head in the locking end pipe, and can be conveniently connected with the cable head, no knots are left outside when the lead hole is connected with the traction rope, The tractor body has a smooth surface, which is not easy to jam when passing through complex environments.

Description of drawings

Fig. 1 is a schematic diagram of a cable laying head of the present invention;

The reference signs in the figure are: tractor head body 1 , lead wire hole 11 , locking end 12 , slit 121 , round hole 122 , clamping opening 123 , clamping structure 13 , and nut 2 .

detailed description

Below in conjunction with accompanying drawing and embodiment the present invention is further described:

The cable laying tractor includes a hollow tractor body 1, the tractor body 1 has a smooth surface shape, a lead hole 11 is opened at one end of the tractor body 1, and a tubular locking end 12 is provided at the other end of the tractor body 1 , The locking end 12 is also provided with a locking structure for clamping the cable head in the tube of the locking end 12 .

As shown in Figure 1, the cable laying leader, the leader body 1 is a hollow structure, the traction rope is extended from the lead hole 11 into the inside of the leader body 1, the rope can be knotted and stuck in the leader body 1, for To pull the cable, the joint of the rope is left in the pull head body 1 to prevent jamming when the cable is pulled.

The traction head body 1 has a smooth surface shape, so that the traction head reduces resistance when passing through obstacles or narrow spaces. The smooth surface shape refers to shapes such as spherical, ellipsoidal, egg-shaped, shuttle-shaped, olive-shaped, etc., the surfaces of which are all smooth and arc-shaped, and are not prone to jamming.

Preferably, when a shuttle-shaped or olive-shaped puller body 1 is used, the lead hole 11 is located at the tip of the shuttle-shaped or olive-shaped. As shown in Figure 1, the lead hole 11 is set at the tip of the shuttle or olive, which can pass through the narrow space more easily. For example, there are multiple cables in the cable channel, and the tractor body 1 passes through the gaps of multiple cables. .

The locking end 12 is tubular, and the cable head is clamped in the locking end 12 tube with a locking structure, and there is no cable knot outside to avoid jamming when the cable passes through.

For example, the locking structure may include a sleeve, and the peripheral surface of the sleeve is provided with wedge-shaped projections extending parallel to the axial direction, and the two sides of the wedge-shaped projections are also provided with cracks parallel to the extending direction of the wedge-shaped projections. For the cable head, the entire casing is inserted into the tube of the locking end 12, and the wedge-shaped protrusion is squeezed and shrinks radially inward, pressing the inner cable head, and the cable is connected to the traction head body 1, and then the traction rope can be pulled, Drive the cable to run. A buckle structure can also be provided between the sleeve and the locking end 12 to form a buckle after the sleeve is plugged into the locking end 12 to prevent loosening.

In order to facilitate the removal of the traction head and the cable, preferably, it is also possible that the locking structure includes: the locking end 12 is provided with a slit 121 parallel to the axial direction, and also includes a nut 2, and the nut 2 is connected to the locking end 12 thread fit and close to the end of the traction head body 1, the size of the end surface of the traction head body 1 close to the nut 2 is larger than the size of the end surface of the nut 2, and the nut 2 and the locking end 12 are also provided with a compression locking end 12 Conical structure.

That is, the locking nut 2 is provided on the locking end 12, and the locking end 12 can shrink and deform toward the gap 121 by virtue of the tapered structure, and then clamp the inner cable head to realize the connection between the traction head body 1 and the cable head , and then the cable can be driven to run by pulling the traction rope. The lumen of the locking end 12 can preferably be a cylindrical lumen to increase the contact area with the cable head.

The nut 2 is closely attached to the end of the traction head body 1, and the size of the end face of the traction head body 1 close to the nut 2 is larger than that of the nut 2, so as to prevent the gap or protrusion between the nut 2 and the traction head body 1 from passing through complex environments. , prevent obstacles from getting stuck in the above-mentioned gaps or protrusions.

The tapered structure is used to squeeze the locking end 12 radially inward when locking the nut 2, and then compress the inner cable head. The way of realization can be: the locking end 12 is conical tubular , and the large diameter end is close to the traction head body 1; the threaded hole of the nut 2 is in the shape of a cylindrical hole, and the inner diameter of the threaded hole of the nut 2 is smaller than the tapered tubular large diameter end of the locking end 12.

During use, unscrew the nut 2, extend the cable head into the tube of the locking end 12, and then tighten the nut 2, then when the nut 2 reaches the large diameter end of the locking end 12, the locking end 12 is forced to deform toward the gap 121, The inner diameter of the locking end 12 shrinks, and the cable head is clamped and locked in the locking end 12 .

The tapered structure can also be: the locking end 12 is cylindrical, the threaded hole of the nut 2 is a tapered hole, and the large diameter end is close to the traction head body 1, and the inner diameter of the small diameter end is Cylindrical tube smaller than locking end 12.

When in use, loosen the nut 2, extend the cable head into the tube of the locking end 12, then tighten the nut 2, when the small diameter end of the threaded hole of the nut 2 is screwed to the cylindrical tube of the locking end 12, the locking is forced The end 12 is deformed toward the slit 121 , and the inner diameter of the locking end 12 shrinks, so that the cable head is clamped and locked in the locking end 12 .

The tapered structure can also be: the locking end 12 is conical tubular, and the large diameter end is close to the traction head body 1; the threaded hole shape of the nut 2 is suitable for the tapered tubular shape of the locking end 12 match.

In the same way as the previous two embodiments, unscrew the nut 2, insert the cable head into the tube of the locking end 12, and then tighten the nut 2, the small diameter end of the threaded hole of the nut 2 will force the locking end 12 to deform toward the gap 121 , the inner diameter of the locking end 12 shrinks, and the cable head is clamped and locked in the locking end 12 .

In order to increase the biting force between the locking end 12 and the cable head, preferably, the inner wall of the locking end 12 is provided with a biting structure 13 .

The clamping structure 13 is used to increase the clamping force, frictional force or bite force with the cable head, for example, spikes, rough surfaces, or protrusions can be provided on the inner wall of the locking end 12 to achieve the above purpose.

Preferably, the snapping structure 13 may be an internal thread. When the cable head is inserted into the locking end 12, the nut 2 is locked, and the locking end 12 presses the inner cable head, and the inner thread can bite into the surface of the cable head, increasing the connection strength between the cable head and the pulling head body 1.

In addition, preferably, a circular hole 122 may be provided at the end of the slit 121 . That is, as shown in FIG. 1 , a round hole is provided at the end of the slit 121 close to the main body 1 of the traction head to prevent rupture along the slit 121 .

A clamping opening 123 for tool clamping is also provided on the surface of the traction head body 1 at a position between the maximum peripheral dimension of the traction head body 1 and the nut 2 . As shown in FIG. 1 , a wrench can be used to clamp the clamping opening 123 , and another wrench can be used to tighten the nut 2 .

Claims (10)

1. Cable laying head, characterized in that it includes a hollow head body (1), the head body (1) has a smooth surface shape, and one end of the head body (1) is provided with a lead hole (11), The other end of the pulling head body (1) is provided with a tubular locking end (12), and the locking end (12) is also provided with a locking structure for clamping the cable head in the tube of the locking end (12). 2. The pulling head for cable laying according to claim 1, characterized in that, the locking structure comprises: the locking end (12) is provided with a slit (121) parallel to the axial direction, and also includes a nut (2) , the nut (2) is threadedly matched with the locking end (12) and clings to the end of the traction head body (1), and the size of the end surface of the traction head body (1) close to the nut (2) is larger than that of the nut (2) The size of the end face, the nut (2) and the locking end (12) are also provided with a tapered structure that compresses the locking end (12). 3. The pulling head for cable laying according to claim 2, characterized in that, the tapered structure is: the locking end (12) is conical tubular, and the large diameter end is close to the pulling head body (1 ); the shape of the threaded hole of the nut (2) is a cylindrical hole, and the inner diameter of the threaded hole of the nut (2) is smaller than the tapered tubular large diameter end of the locking end (12). 4. The pulling head for cable laying according to claim 2, characterized in that the tapered structure is: the locking end (12) is cylindrical and tubular, and the threaded hole of the nut (2) is in the shape of a cone A cylindrical tube with a large diameter end close to the traction head body (1) and an inner diameter of the small diameter end smaller than the locking end (12). 5. The pulling head for cable laying according to claim 2, characterized in that, the tapered structure is: the locking end (12) is conical and tubular, and the large diameter end is close to the pulling head body (1 ); the shape of the threaded hole of the nut (2) is adapted to the tapered tubular shape of the locking end (12). 6. The pulling head for cable laying according to claim 1, characterized in that, the pulling head body (1) is shuttle-shaped or olive-shaped, and the lead hole (11) is located at the tip of the shuttle-shaped or olive-shaped. 7. The pulling head for cable laying according to claim 2, characterized in that, the inner wall of the locking end (12) is provided with a gripping structure (13). 8. The pulling head for cable laying according to claim 7, characterized in that, the clamping structure (13) is an internal thread. 9. The pulling head for cable laying according to claim 7, characterized in that, the lumen of the locking end (12) is a cylindrical lumen; the end of the split (121) is provided with a round hole (122). 10. The pulling head for cable laying according to claim 2, characterized in that it is on the surface of the pulling head body (1) and at a position between the maximum peripheral dimension of the pulling head body (1) and the nut (2) A gripping port (123) for tool gripping is also provided.