CN206287068U - Drilling rod is clamped with new unloading - Google Patents

Abstract

The utility model discloses a new type of unscrewing pliers for drill pipes, which comprises movable jaws and fixed jaws; the inner jaw of the movable jaws comprises a planar occlusal end surface and an arc-shaped concave clamping inner surface. The angle between the plane where the opening of the clamping inner surface is located and the occlusal end surface is 65°-80°, and the rear end of the movable jaw is hinged on the fixed jaw; the fixed jaw includes a pliers head and two sides. The pliers handle, the pliers head is fixedly clamped between the two pliers handles, the rear end of the movable jaw is hinged between the two pliers handles through a pin shaft, and a mounting block is arranged between the two pliers handles. The spring sheet is fixedly installed, and the rear end of the movable jaw has an arc-shaped convex surface. When the movable jaw rotates around the pin shaft, the arc-shaped convex surface at the rear end of the movable jaw contacts the spring sheet to make the spring sheet bend or expand. The unscrewing tongs for drill pipes will have a wide range of applications and strong operability, and are expected to completely replace traditional chain tongs and pipe tongs in the near future.

Description

New unscrewing pliers for drill pipe

technical field

The utility model relates to a rod unscrewing device, in particular to a rod unscrewing pliers.

Background technique

In the prior art, a wrench is a very versatile installation and removal tool. Its principle is to use the principle of leverage to twist bolts, screws, nuts and other threaded fastening bolts or socket fasteners. The wrench is usually made with clamping jaws at one or both ends of the handle. When in use, an external force is applied to the handle along the thread rotation direction to twist the bolt or nut.

According to whether the jaws can move, wrenches can be divided into dead wrenches and live wrenches. An adjustable wrench, also known as a network wrench, is a tool for tightening or loosening angled screws or nuts. Commonly used are 200mm, 250mm and 300mm, which should be selected according to the size of the nut when used. Dead wrenches mainly include Allen wrench (Inner hexagon), Phillips screwdriver (Phillips screwdriver), double-ended wrench (double-ended wrench), ring wrench and socket wrench (with roundabout), etc.

At the same time, the current manual working tongs such as pipe tongs and chain tongs used in geological drilling are bulky and have poor unscrewing effects. There is an urgent need for a light, easy-to-use pipe tong that can adapt to a certain caliber (￠50-￠130mm).

Utility model content

Aiming at the shortcomings and deficiencies in the above-mentioned prior art, the purpose of this utility model is to provide a light and durable unscrewing pliers. The small unscrewing pliers can meet the requirements of conventional nut unscrewing, and the slightly larger ones can meet the requirements of geological drill pipe unscrewing.

The purpose of this utility model is achieved by the following technical solutions:

A new type of unscrewing pliers for drill rods, including movable jaws and fixed jaws; the inner jaw of the movable jaws includes a planar occlusal end surface and a clamping inner surface designed as an arc-shaped concave surface, and the opening of the clamping inner surface The included angle between the plane where it is located and the occlusal end surface is 65°-80°, and the rear end of the movable jaw is hinged on the fixed jaw; the fixed jaw includes a pincer head and handles on both sides, and the pincer head Fixedly clamped between two pliers handles, the rear end of the movable jaw is hinged between the two pliers handles through a pin shaft, a mounting block is arranged between the two pliers handles, and a spring leaf is fixedly installed on the mounting block, The rear end of the movable jaw has an arc-shaped convex surface. When the movable jaw rotates around the pin shaft, the arc-shaped convex surface at the rear end of the movable jaw contacts the spring leaf to make the spring leaf bend or unfold.

Preferably, ratchets are provided on the jaw inner jaw surfaces corresponding to the movable jaw and the fixed jaw, and the inclination direction of the ratchet teeth on the inner jaw surface of the movable jaw is the same as that of the ratchet teeth on the inner jaw surface of the fixed jaw. On the contrary, the inclination angle of the ratchet is 17°-26°.

Preferably, teeth are provided on the arc-shaped convex surface at the rear end of the movable jaw, and corresponding teeth are processed and formed on the spring sheet to mesh with the teeth on the movable jaw.

Preferably, both sides of the spring piece are bent upward to form a guide groove.

Preferably, the spring piece is an FeCrCo magnetic spring piece, and the teeth on the arc-shaped convex surface at the rear end of the movable jaw are FeCrCo magnetic teeth.

Preferably, a metal connecting piece is arranged between the two pliers handles.

Preferably, the metal connection piece is carbon steel, and the metal connection piece is welded between the two pliers handles.

Preferably, the ratchets on the movable jaws and the fixed jaws are welded on the inner jaw surfaces, and the material of the ratchets is YG11C hard alloy.

Preferably, a YMD451-4 type wear-resistant welding wire is deposited and welded on the ratchet to form a wear-resistant layer.

Compared with the prior art, the utility model embodiment has at least the following advantages:

On the basis of the principle of the traditional wrench, the unscrewing pliers for drill pipe design the inner jaw of the jaw as a curved surface, and the curved surface is inlaid with YG11C hard alloy tooth grooves, and the clamped parts (cylindrical or similar cylinders) are clamped through the tooth grooves. ), to achieve the purpose of reversing the firmware (not slipping). Its characteristic is that it can not only twist angular fasteners that can be twisted by other wrenches, such as bolts, nuts, screws, sleeves, etc., but also can twist smooth cylindrical fasteners without corners and threads, and its caliber is adjustable, solid and durable, and portable . The unscrewing pliers for drill rods will have wide application range and strong operability, and are expected to completely replace traditional wrenches in the near future.

Description of drawings

Fig. 1 is the structural representation of the novel unscrewing tongs of the utility model drill rod;

FIG. 2 is a top view of FIG. 1 .

detailed description

The utility model will be described in further detail below in conjunction with the embodiments and Figures 1-2 thereof. The following embodiments are only descriptive, not restrictive, and cannot limit the protection scope of the utility model.

As shown in Figures 1-2, Figure 1 is a schematic structural view of a new type of unscrewing pliers for drill pipes of the present invention, and Figure 2 is a top view of Figure 1.

A new type of unscrewing pliers for drill rods, including a movable jaw 1 and a fixed jaw 2; the inner jaw of the movable jaw 1 includes a planar occlusal end surface 3 and an arc-shaped concave clamping inner surface 4, the The angle between the plane where the opening of the clamping inner surface 4 is located (that is, the plane where the line between the two opening ends of the arc-shaped concave surface is located) and the occlusal end surface 3 is 65° to 80°, and the movable jaw 1 The rear end is hinged on the fixed jaw 2; the fixed jaw 2 includes a pliers head 5 and pliers handles 6 on both sides, the pliers head 5 is fixedly clamped between the two pliers handles 6, and the movable jaw 1 The rear end is hinged between the two pliers handles 6 through the pin shaft 7, and a mounting block 8 is arranged between the two pliers handles 6. A spring leaf 9 is fixedly installed on the mounting block 8. The rear end of the movable jaw 1 has an arc When the movable jaw 1 rotates around the pin shaft 7, the arc-shaped convex surface at the rear end of the movable jaw 1 contacts the spring leaf 9 to make the spring leaf 9 bend or expand.

A ratchet is arranged on the inner jaw surface corresponding to the movable jaw 1 and the fixed jaw 2, and the ratchet on the inner jaw surface of the movable jaw 1 is inclined in the same direction as the ratchet on the inner jaw surface of the fixed jaw 2. The inclination direction of the teeth is opposite, and the inclination angle of the ratchet is 17°-26°.

Teeth are provided on the arc-shaped convex surface at the rear end of the movable jaw 1 , and corresponding teeth on the spring piece 9 are processed and formed to mesh with the teeth on the movable jaw 1 .

Preferably, both sides of the spring piece 9 are bent upwards to form guide grooves 10, so that the spring piece 9 and the arc-shaped convex surface at the rear end of the movable jaw 1 are tightly fitted and not easy to slip during the movement, and play a guiding role.

The spring piece 9 is an FeCrCo magnetic spring piece 9, and the teeth on the curved convex surface at the rear end of the movable jaw 1 are FeCrCo magnetic teeth.

A metal connection piece 11 is arranged between the two pliers handles 6, and the metal connection piece 11 is a carbon steel bar, and the metal connection piece 11 is welded between the two pliers handles 6 to improve the overall strength of the wrench. In addition, the openings and gaps between the handles of the pliers are sealed with carbon fiber composite material to reduce the weight of the unscrewing pliers. Simultaneously, in order to increase the torque, a sleeve can be installed on the pliers handle 6 .

Both the fixed jaw 2 and the movable jaw 1 are die-cast aluminum alloy YZAlSi9Cu4 or carbon steel (different raw materials are selected according to actual needs, and the main consideration is to ensure sufficient strength of the jaws) by casting. In the actual processing process, the finished shape of the general movable jaw 1 is also similar to the composition of the fixed jaw 2. A block-shaped middle piece is sandwiched between two die-cast aluminum alloy YZAlSi9Cu4 or carbon steel alloy pieces. held together by bolts. The middle piece can also be formed by die-casting aluminum alloy YZAlSi9Cu4 or carbon steel, or other metal materials can be used for molding.

The ratchets on the movable jaw 1 and the fixed jaw 2 are formed by insert welding on their inner jaw surfaces, and the material of the ratchets is YG11C hard alloy.

Weld YMD451-4 type wear-resistant welding wire on the ratchet to form a wear-resistant layer.

The working principle of this unscrewing pliers:

When using the unscrewing pliers, first break the movable jaw 1 by hand (or other external force if necessary), put the rod into the jaw, and the movable jaw 1 will automatically tighten the rod under the elastic force of the spring leaf 9 When the pliers are rotated and unscrewed, the rod will not slip off due to the ratchet teeth on the movable jaw 1 and the fixed jaw 2 being fastened. When the unscrewing pliers work, the torque is transmitted from the rear end of the pliers to the front end of the pliers body and acts on the rod. The main part of the force is the front end of the fixed jaw 2, and the front end of the movable jaw 1 is the front end of the movable jaw 1 that cooperates with the force and mainly plays a fixed role. . The inclination angle of the ratchet on the movable jaw 1 and the fixed jaw 2 is designed to be 17°-26°, and the angle between the occlusal end surface and the plane where the opening of the clamping inner surface is located is 65°-80° for the purpose of clamping If the rod is analyzed from the cross-section, the rod is under the envelope of the occlusal end surface 3 of the movable jaw 1 and the clamping inner surface 4, and the adjacent two slopes formed by the inclined ratchet teeth on the movable jaw 1 and the fixed jaw 2 The high point between them forms a bite effect on the bar, transforming the quasi-planar contact between the movable jaw 1 and the fixed jaw 2 and the bar into a multi-point contact, increasing the friction during the unscrewing process, which is more conducive to fixing Lever. The rear end of the movable jaw 1 and the spring leaf 9 are designed as iron chromium cobalt FeCrCo magnetic material, which can keep close line contact at all times, rotate flexibly and reduce friction.

The surface of the whole unscrewing pliers has been subjected to press-in sandblasting treatment, and the material is ordinary quartz sand (SiO ₂ ≥88-99.8%, Fe ₂ O ₃ ≤0.06-0.005%, refractoriness 1750-1800°C, and the appearance of particles is uniform , the particle size is 1~3MM, pure white), and the roughness is R/z=60um~80um, which should comply with GB/T13288 "Evaluation of Surface Roughness Grade of Steel before Painting (Comparison Sample Method)".

The above is only a preferred embodiment of the utility model, but the scope of protection of the utility model is not limited thereto, and any person familiar with the technical field can easily think of All changes or replacements should fall within the protection scope of the present utility model. Therefore, the protection scope of the present utility model should be based on the protection scope of the claims.

Claims (9)

1. A new type of unscrewing pliers for drill rods, comprising movable jaws and fixed jaws; the inner jaw of the movable jaws includes a planar occlusal end surface and a clamping inner surface designed as an arc-shaped concave surface, and the clamping inner surface The angle between the plane where the opening is located and the occlusal end surface is 65°-80°, the rear end of the movable jaw is hinged on the fixed jaw; the fixed jaw includes a pliers head and handles on both sides, The pliers head is fixedly clamped between the two pliers handles, the rear end of the movable jaw is hinged between the two pliers handles through a pin shaft, and a mounting block is arranged between the two pliers handles, and a spring is fixedly installed on the mounting block The rear end of the movable jaw has an arc-shaped convex surface. When the movable jaw rotates around the pin shaft, the arc-shaped convex surface at the rear end of the movable jaw contacts the spring leaf to make the spring leaf bend or unfold. 2. The new type unscrewing pliers for drill rods according to claim 1, characterized in that ratchets are arranged on the inner jaw surfaces corresponding to the movable jaws and the fixed jaws, and the inner jaw surfaces of the movable jaws The inclination direction of the ratchet on the upper jaw is opposite to the inclination direction of the ratchet on the inner jaw surface of the fixed jaw, and the inclination angle of the ratchet is 17°-26°. 3. The new type unscrewing pliers for drill rods according to claim 1, characterized in that teeth are arranged on the arc-shaped convex surface at the rear end of the movable jaw, and corresponding teeth are processed and formed on the spring leaf to match the movable jaw. Teeth that mesh with each other. 4. The new type unscrewing pliers for drill rods according to claim 3, characterized in that, the two sides of the spring leaf are bent upwards to form guide grooves. 5. The new type unscrewing pliers for drill pipe according to claim 3 or 4, characterized in that, the spring piece is an iron chromium cobalt FeCrCo magnetic spring piece, and the teeth on the curved convex surface at the rear end of the movable jaw are It is iron chromium cobalt FeCrCo magnetic teeth. 6. The new unscrewing pliers for drill rods according to claim 1, characterized in that, a metal connecting piece is arranged between the two pliers handles. 7. The new unscrewing pliers for drill rods according to claim 6, characterized in that, the metal connecting piece is made of carbon steel, and the metal connecting piece is welded between the two pliers handles. 8. The new type unscrewing pliers for drill rods according to claim 2, characterized in that the ratchets on the movable jaws and the fixed jaws are inlaid and welded on their inner jaw surfaces, and the material of the ratchets is YG11C Carbide. 9. The new type unscrewing pliers for drill rod according to claim 8, characterized in that, the wear-resistant layer is formed by welding YMD451-4 type wear-resistant welding wire on the ratchet.