CN201261177Y - A special tool for screwing in studs - Google Patents

Abstract

The utility model relates to a special tool for a screw-in double-head screw stud, which comprises two clamping bars rotationally connected. Two fixture blocks are arranged on the two clamping bars. The inner side of the fixture block is a cambered surface on which a gibbous structure is arranged. Two movable blocks are arranged between the two fixture blocks, connected with the fixture blocks by adjusting screws, and positioned at the top ends of the adjusting screws. Because the inner sides of the two fixture blocks or the movable blocks are the cambered surfaces on which internal screw threads or convex teeth arrayed in a spiral line are arranged, and the specification and the model of a screw thread grip formed by the two fixture blocks or the movable blocks are the same as those of the screw thread of the screw-in double-head screw stud to be assembled or disassembled, when the screw-in double-head screw stud is installed or disassembled, the two fixture blocks or the movable blocks directly clamp the screw thread part of the non-screw-in end of the screw-in double-head screw stud, the surface where the two fixture blocks or the movable blocks are in contact with the screw-in double-head screw stud is a screw thread surface, thus the screw-in double-head screw stud can be quickly and easily assembled or disassembled, and the screw thread surface of the screw-in double-head screw stud can not be damaged.

Description

A special tool for screwing in studs

technical field

The utility model relates to a loading and unloading tool, in particular to a special tool for installing and dismounting screwed-in studs.

Background technique

Chemical enterprises are process-oriented enterprises. The chemical materials between the production equipment of the enterprise are widely transported by pipelines. The pipelines are designed with valves, flanges and other pipe fittings. The connection between the pipelines entering and leaving the equipment and the equipment body is generally connected by threaded flanges. It is high-pressure equipment, and the connection between the inlet and outlet of some high-pressure valves and its pipelines is also connected by threaded flanges. The threaded flange connection is to install the threaded flange on the threaded pipe first, and then screw in the stud bolts to fasten the threaded flange with the equipment or high-pressure valve. Each set of screw-in studs consists of a screw-in stud and a nut. During installation, usually screw the screw-in end of the double-ended stud into the screw hole on the equipment body first, then install the high-pressure flange together with the high-pressure pipe and other pipe fittings, and finally tighten the nut. The standard screw-in stud does not have a boss held by an ordinary wrench. Generally, the assembly and maintenance workers directly screw the screw-in stud into the screw hole by hand, which is very laborious and low in work efficiency, especially It is more obvious when the stud is screwed in and the screw hole is tight. To solve this problem, there are two methods that are often used. One method is: first install two nuts on the non-screw-in end of the screw-in double-ended stud, tighten the two nuts, and use a wrench to pull one of the nuts, so that the screw-in double-ended stud can be screwed Insert them into the screw holes on the device body, and then remove the two nuts after screwing them in place. The disadvantage of this method is that it is more troublesome and the work efficiency is low; another method is: clamp the screwed studs with pipe wrench, and then screw the screwed studs into the screw holes of the equipment body, but this The disadvantage of this method is that whether it is clamped on the polished rod or the thread of the stud, it is easy to slip and damage the surface of the stud. Therefore, be necessary to design a kind of special tool, improve existing method, so that fast installation or dismounting are screwed into stud.

Utility model content

In order to overcome the deficiencies in the background technology, the utility model provides a special tool that can quickly install or disassemble various specifications of screwed-in studs without damaging the threaded surface of the screwed-in studs.

The technical scheme adopted by the utility model to solve the technical problem: a special tool for screwing in double-ended studs, including two clamping rods connected by rotation, and clamping blocks are arranged on the two clamping rods.

The inner side of the clamping block is an arc surface, and the arc surface has a convex structure.

The convex structure is an internal thread or convex teeth arranged in a helical line.

Two movable blocks are arranged between the two clamping blocks, and the movable blocks are connected with the clamping blocks through adjusting screws, and are located at the tops of the adjusting screws.

The inner side of the movable block is an arc surface, and the arc surface has a convex structure.

The convex structure is an internal thread or convex teeth arranged in a helical line.

The two clamping bars are connected by a living hinge.

Beneficial effects of the utility model: Since the inner sides of the two clamping blocks or the two movable blocks are arc-shaped surfaces, the arc-shaped surfaces have internal threads or convex teeth arranged in a helical line, and the threaded jaws composed of the two clamping blocks or the two movable blocks The specifications and models are the same as the specifications and models of the threads screwed into the studs to be installed or disassembled. The threaded part of the screw-in end, the contact surface between the two clamping blocks or the two movable blocks and the threaded stud is the threaded surface, the contact area is large, and the small clamping force can produce a relatively small clamping force on the threaded part screwed into the stud. Large frictional force to transmit torsional moment, so it can be quickly and easily installed or removed screwed into the stud, the work efficiency is very high, and the threaded surface of the screwed into the stud will not be damaged. The tool is simple in structure, easy to use, and convenient to popularize and apply.

Description of drawings

Fig. 1 is the front view of the utility model embodiment 1;

Fig. 2 is the top view of the utility model embodiment 1;

Fig. 3 is the front view of the utility model embodiment 2;

Fig. 4 is a top view of Embodiment 2 of the present utility model.

Detailed ways

Example 1

As shown in FIG. 1 and FIG. 2 , the tool includes two clamping rods 1 , and the ends of the two clamping rods 1 are connected by a hinge 5 . The position near the hinge on the two clamping rods 1 is provided with an arc-shaped clamping block 2, which has threaded holes on the two arc-shaped clamping blocks 2, and screws 4 are housed in the threaded holes, and the ends of the screws 4 are connected with arc-shaped movable blocks 3. The inner side of the shape movable block 3 has internal thread, and forms thread clamping mouth 6 between two arc-shaped movable blocks 3. The distance between the two arc-shaped movable blocks 3 can be adjusted by rotating the two screws 4, and the size of the screw clamp 6 can be adjusted by replacing the two arc-shaped movable blocks 3 of different specifications, so as to be suitable for screwing in double heads of various specifications. Assembly and disassembly of studs.

Example 2

As shown in Fig. 3 and Fig. 4, the tool includes two clamping rods 1, the ends of the two clamping rods 1 have arc-shaped clamping blocks 2, and the two clamping rods are connected by a hinge 5 near the clamping blocks. There are threaded holes on the two arc-shaped clamping blocks 2, screws 4 are housed in the threaded holes, the ends of the screws 4 are connected with arc-shaped movable blocks 3, the inner sides of the two arc-shaped movable blocks 3 have internal threads, Constitute the thread clamp 6 between. The distance between the two arc-shaped movable blocks 3 can be adjusted by rotating the two screws 4, and the size of the screw clamp 6 can be adjusted by replacing the two arc-shaped movable blocks 3 of different specifications, so as to be suitable for screwing in double heads of various specifications. Assembly and disassembly of studs.

The utility model is not limited to the above two embodiments. In Embodiment 1 and Embodiment 2, the arc-shaped movable block 3 and the screw 4 may not be provided, but the internal threads are directly processed on the inner sides of the two arc-shaped clamping blocks 2 or arranged in a helical line. The protruding teeth are formed by the threaded jaws between the two arc-shaped clamping blocks 2, and the studs screwed in are clamped; the inner side of the movable block 3 in the embodiment 1 and the embodiment 2 can not process the internal thread, but process The protruding teeth arranged in a helical line are used to clamp the stud; the screw 4 in embodiment 1 and embodiment 2 may not be a screw, but a cylindrical pin or a cylindrical pin with a boss can be used to support and position the movable block 3; In addition, the profile of the clamping block 2 and the movable block 3 can not be arc-shaped, but other shapes, as long as its inner side is an arc-shaped surface; One or more flats of a clamping nut so that the nut or bolt can be loaded and unloaded.

Claims (7)

1. A special tool for screwing in double-ended studs, characterized in that it includes two clamping rods (1) connected by rotation, and there are clamping blocks (2) on the two clamping rods (1). 2. The special tool for screwing in studs according to claim 1, characterized in that: the inner side of the clamp block (2) is an arc-shaped surface, and the arc-shaped surface has a convex structure. 3. The special tool for screwing in studs according to claim 2, characterized in that: the convex structure is an internal thread or convex teeth arranged in a helical line. 4. The special tool for screwing in studs according to claim 1, characterized in that: two movable blocks (3) are arranged between the two clamping blocks (2), and the movable blocks (3) are adjusted by the adjusting screw ( 4) Connect with the clamp block (2) and be located at the top of the adjusting screw (4). 5. The special tool for screwing in studs according to claim 4, characterized in that: the inner side of the movable block (3) is an arc-shaped surface, and the arc-shaped surface has a convex structure. 6. The special tool for screwing in studs according to claim 5, characterized in that: said convex structure is an internal thread or convex teeth arranged in a helical line. 7. The special tool for screwing in studs according to claim 1, characterized in that: the two clamping rods (1) are connected by a living hinge (5).

Images