CN105257662A - Demounting-proof nut and matched special tool thereof - Google Patents

Abstract

The invention relates to a demounting-proof nut and a matched special tool thereof. The demounting-proof nut comprises a retaining nut body with an internal thread and a retaining gland. The retaining nut body and the retaining gland are used in cooperation through balls. The retaining nut body is of an integrated structure formed by connecting a hexagonal body and a cylinder. At least two round through holes are formed in the outer wall of the cylinder of the retaining nut body, and the balls are placed in the through holes. The retaining gland is a ladder sleeve. One end of the inner wall of the retaining gland is a conical face with the outer portion larger than the inner portion. An annular trench is formed in the inner wall of the retaining gland, and the bottom face of the annular trench is in an arc shape matched with the balls. According to the demounting-proof nut and the matched special tool thereof, operation is easy and fast, work efficiency is improved, the labor intensity of workers is lowered, and the fixed asset recycling rate and line construction and maintenance efficiency are improved. The actual work problems of electric transmission line construction and maintenance can be solved.

Description

An anti-disassembly nut and its supporting special tool

technical field

The invention relates to an anti-disassembly nut, in particular to an anti-disassembly nut and a matching special tool.

Background technique

The anti-disassembly nut currently used in the power system is an embedded ball type. Although the embedded ball type has an anti-disassembly function, it cannot be disassembled. Destructive disassembly is required for disassembly. Waste of manpower and material resources.

The patent CN2787908Y "A Stop Nut for Loop Cable" discloses a kind of stop nut, which includes a nut body and a groove on the inner wall of the nut hole. The groove is a loop cable groove, and there are more than two loop cable linear grooves , and set in equal parts, there are steel balls or steel columns in the groove. The above-mentioned patent can prevent slack, but cannot be disassembled, and is not suitable for power transmission facilities.

Patent CN201090590Y "Detachable Anti-theft Nut" discloses a detachable anti-theft nut, which includes an inner sleeve with internal threads and a hexagonal outer sleeve. The inner sleeve is placed in the outer sleeve for interference and fixed fit, and the outer wall of the inner sleeve Corresponding anti-retreat steps are provided on the inner wall of the jacket and the outer jacket, through holes are arranged on the side wall of the jacket, and blind holes are correspondingly provided on the outer wall of the inner jacket. Although the above-mentioned patents can be disassembled, they require high processing precision and the assembly of the inner and outer jackets is complicated. Once the interference fit is not in place, it is easy to be unable to disassemble.

Contents of the invention

The technical problem to be solved by the present invention is to provide an anti-disassembly nut and its matching special tools, which can ensure the anti-theft performance of the nuts and can be disassembled with special tools.

To achieve the above object, the present invention adopts the following technical solutions:

An anti-removal nut, including a back nut with internal threads and a back cover, the back nut and the back cover are used in cooperation with balls, and the back nut is formed by connecting a hexagon and a cylinder In the overall structure, there are at least two circular through holes on the outer wall of the cylinder of the stop nut, balls are placed in the through holes, the stop cover is a stepped sleeve, and one end of the inner wall of the stop cover is a tapered surface with a large outside and a small inside. , the inner wall of the backstop gland is provided with an annular groove, and the bottom surface of the annular groove is arc-shaped to match with the balls.

The diameter of the ball is larger than the wall thickness of the cylinder of the stop nut.

The installation tool for the anti-disassembly nut includes a sleeve and a wrench. The wrench is welded vertically on the outer wall of the sleeve. There are stepped blind holes in the sleeve. The maximum inner diameter of the sleeve is greater than the maximum outer diameter of the anti-retraction gland. The inner diameter is smaller than the minimum inner diameter of the backstop gland, and the wrench of the wrench is consistent with the size of the hexagon of the backstop nut.

The dismantling tool for the anti-disassembly nut includes grabbing beams, claws and jacking screws. At least two grabbing claws are connected to the grabbing beam by a pin shaft. There is a threaded hole in the center of the grabbing beam. The end is hexagonal, and the front end of the screw rod of the top screw is tapered.

The installation and removal method of the anti-disassembly nut, the specific steps are as follows:

a. When installing, install the bolt and back nut in place, put a little glycerin on the ball and put it into the through hole of the back nut;

b. The side of the anti-retraction gland with the tapered surface is fixed on the surface of the ball, take the installation tool for the anti-removal nut, put the sleeve on the anti-retraction gland, hit the top of the sleeve with a heavy object, and press the anti-retraction The cover is pressed in, the annular groove of the backstop gland fits with the balls to press the balls, the balls are pressed into the threads of the bolts, the bolts and backnuts cannot be rotated, and the installation is complete;

c. When disassembling, take the demolition tool for the anti-removal nut, grasp the claw on the step edge of the anti-retraction gland, push the top screw on the bolt, turn the top screw to remove the anti-retraction gland, and then rotate the nut, The bolts are removed.

Compared with prior art, the beneficial effect of the present invention is:

The anti-disassembly nut and its supporting special tools are simple and quick to operate, which improves work efficiency, reduces the labor intensity of staff, and improves the recovery rate of fixed assets and the efficiency of line construction and maintenance. It can solve practical problems in the construction and maintenance of transmission lines.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a schematic structural diagram of a back nut.

Figure 3 is the right view of the structure of the back nut.

Fig. 4 is a structural schematic diagram of the backstop gland.

Fig. 5 is a schematic diagram of the structure used in the present invention.

Fig. 6 is a structural schematic diagram of an installation tool for an anti-disassembly nut.

Fig. 7 is a structural schematic diagram of a removal tool for an anti-disassembly nut.

Fig. 8 is a structural schematic diagram of the grabbing beam.

In the figure: 1-stop nut 2-stop gland 3-ball 4-bolt 5-sleeve 6-wrench 7-grabbing beam 8-claw 9-pin shaft 10-top wire 11-ring groove

detailed description

The specific embodiment of the present invention is further described below in conjunction with accompanying drawing:

As shown in Figure 1-5, an anti-removal nut includes a back nut 1 with an internal thread and a back cover 2, the back nut 1 and the back cover 2 are used in conjunction with a ball 3, the back stop The nut 1 is an overall structure formed by connecting a hexagon and a cylinder. The outer wall of the cylinder of the stop nut 1 is provided with at least two circular through holes, and balls 3 are placed in the through holes. The diameter of the ball 3 is larger than that of the stop nut cylinder. Wall thickness, anti-retraction gland 2 is a stepped sleeve, one end of the inner wall of the anti-retraction gland 2 is a tapered surface with a large outside and a small inside, an annular groove 11 is provided on the inner wall of the anti-retraction gland 2, and the bottom surface of the annular groove 11 is a Compatible arcs.

When the backstop nut 1 is used in conjunction with the bolt 4, the backstop gland 2 presses the backstop nut 1, the ball is compressed to limit the backtracking nut 1 from loosening, and the bolt and the backtracking nut cannot be disassembled.

As shown in Figure 6, the installation tool for the anti-disassembly nut includes a sleeve 5 and a wrench 6. The wrench 6 is welded vertically on the outer wall of the sleeve 5. There is a stepped blind hole in the sleeve 5. The maximum inner diameter of the sleeve 5 is greater than the back pressure. The maximum outer diameter of the cover 2 and the minimum inner diameter of the sleeve 5 are smaller than the minimum inner diameter of the stop gland 2, and the wrench of the wrench 6 is consistent with the size of the hexagon of the stop nut.

As shown in Figure 7, the removal tool for the anti-disassembly nut includes a grabbing beam 7, a grabbing claw 8 and a jacking screw 10. On the grabbing beam 7, two grabbing claws 8 are connected by a pin 9, and the center of the grabbing beam 7 is provided with a threaded hole. 10 is threadedly connected with grabbing beam 7, and the tail end of jackscrew 10 is a hexagon, and the screw rod front end of jackscrew 10 is tapered.

The installation and removal method of the anti-disassembly nut, the specific steps are as follows:

a. When installing, install the bolt and back nut in place, put a little glycerin on the ball and put it into the through hole of the back nut;

b. The side of the anti-retraction gland with the tapered surface is fixed on the surface of the ball, take the installation tool for the anti-removal nut, put the sleeve on the anti-retraction gland, hit the top of the sleeve with a heavy object, and press the anti-retraction The cover is pressed in, the annular groove of the backstop gland fits with the balls to press the balls, the balls are pressed into the threads of the bolts, the bolts and backnuts cannot be rotated, and the installation is complete;

c. When disassembling, take the demolition tool for the anti-removal nut, grasp the claw on the step edge of the anti-retraction gland, push the top screw on the bolt, turn the top screw to remove the anti-retraction gland, and then rotate the nut, The bolts are removed.

The above is only the basic principle of the present invention, and does not limit the present invention in any way. All equivalent changes and modifications according to the present invention are within the scope of the technical protection scheme of this patent.

Claims (5)

1. An anti-removal nut, characterized in that it includes a back nut and a back cover that are provided with internal threads, and the back nut and the back cover are used in conjunction with balls, and the back stop nut is a hexagon and The overall structure formed by the connection of cylinders, the outer wall of the cylinder of the stop nut is provided with at least two circular through holes, balls are placed in the through holes, the stop cover is a stepped sleeve, and one end of the inner wall of the stop cover is an outer Large and small conical surfaces, the inner wall of the backstop gland is provided with an annular groove, and the bottom surface of the annular groove is arc-shaped to match the ball. 2 . The anti-disassembly nut according to claim 1 , wherein the diameter of the ball is larger than the wall thickness of the cylinder of the anti-retraction nut. 3 . 3. The installation tool for the anti-disassembly nut is characterized in that it includes a sleeve and a wrench. The wrench is welded vertically on the outer wall of the sleeve. There is a stepped blind hole in the sleeve. The maximum inner diameter of the sleeve is greater than the maximum outer diameter of the stop gland. The minimum inner diameter of the sleeve is smaller than the minimum inner diameter of the stop gland, and the wrench of the wrench is consistent with the hexagonal size of the stop nut. 4. The removal tool for the anti-disassembly nut is characterized in that it includes a gripping beam, a gripping claw and a jacking wire, the gripping beam is connected by a pin shaft to at least two gripping claws, the center of the gripping beam is provided with a threaded hole, the jacking wire and the gripping beam thread Connection, the tail end of the top wire is a hexagon, and the front end of the screw rod of the top wire is tapered. 5. The method for installing and dismounting the anti-disassembly nut is characterized in that the specific steps are as follows: a. When installing, install the bolt and back nut in place, put a little glycerin on the ball and put it into the through hole of the back nut; b. The side of the anti-retraction gland with the tapered surface is fixed on the surface of the ball, take the installation tool for the anti-removal nut, put the sleeve on the anti-retraction gland, hit the top of the sleeve with a heavy object, and press the anti-retraction The cover is pressed in, the annular groove of the backstop gland fits with the balls to press the balls, the balls are pressed into the threads of the bolts, the bolts and backnuts cannot be rotated, and the installation is complete; c. When disassembling, take the demolition tool for the anti-removal nut, grasp the claw on the step edge of the anti-retraction gland, push the top screw on the bolt, turn the top screw to remove the anti-retraction gland, and then rotate the nut, The bolts are removed.