Large-opening clamp holder for coal mine

Abstract

The invention belongs to the field of hydraulic drilling machine drill rod clamping, and relates to a large-opening clamp holder for a coal mine, which comprises a clamp holder welding frame, an oil cylinder arranged in the clamp holder welding frame, and a slip assembled on the oil cylinder, more than one hinge bolt is further hinged to the top of the clamp holder welding frame, when a drill rod or other large-diameter objects need to be installed from the upper portion of the clamp holder, the objects can be directly installed by turning over the hinge bolts, and the hinge bolts are restored to the original positions after the objects are installed. The hinged bolt is arranged at the top of the clamp holder, and after the hinged bolt is turned over, parts such as a drill rod and a sleeve can be added or taken down from the upper portion of the clamp holder, so that drilling construction of a coal mine drilling machine is greatly facilitated; an existing piston for clamping is replaced by the hydraulic oil cylinder, the opening distance of the clamp holder is increased, and parts such as drill rods and sleeves with different diameters can be clamped; the structure is simple, the number of parts is small, and maintenance is convenient.

Description

Technical Field

[0001] The invention belongs to the field of hydraulic drilling rig drill rod clamping and relates to a large-opening clamp for coal mines. Background Art

[0002] The clamp is an important component of the drilling rig. There are three main types of existing clamp structures: 1. Hydraulic clamping and rubber sleeve loosening; 2. Hydraulic clamping and spring loosening; 3. Hydraulic clamping and hydraulic loosening.

[0003] The working principle of the first type of clamp is that high-pressure oil enters the clamp's sealed chamber, and the hydraulic oil squeezes the rubber sleeve to shrink and hold the drill pipe tightly. When the oil is blocked, the rubber sleeve elastically resets and loosens the drill pipe. The shortcomings of this type of clamp are: (1) The diameter range of the drill pipe that the clamp can clamp is limited, and it cannot pass through a larger or smaller diameter drill pipe; (2) The sleeve is easily damaged; (3) The position of the clamp on the drilling rig affects the installation of the casing.

[0004] The working principle of the second type of clamp is that high-pressure oil enters the clamp's sealed chamber, and the hydraulic oil pushes the clamp's piston to clamp the drill pipe. When the oil is blocked, the clamp's spring resets to release the drill pipe. The shortcomings of this type of clamp are: (1) The clamp is affected by the spring, and the diameter range of the clamped drill pipe is limited, and it cannot clamp drill pipes of larger or smaller diameters; (2) The position of the clamp on the drilling rig affects the installation of the casing. The above three types of clamps have a common disadvantage: the position of the clamp on the drilling rig affects the installation of large-diameter casing or large-diameter objects. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide a large-opening clamp for coal mines, which solves the problem of short stroke and limited diameter range of clamped drill rods in existing clamps, and can clamp drill rods of various diameters; solves the problem that traditional clamps cannot install or remove drill rods from above the clamp, thereby improving work efficiency.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a large-opening clamp for coal mines, comprising a clamp welding frame, an oil cylinder arranged in the clamp welding frame, and a slip assembled on the oil cylinder; the top of the clamp welding frame is also hinged with more than one hinge bolt. When it is necessary to load a drill rod or other large-diameter objects from the top of the clamp, the object can be directly loaded by flipping open the hinge bolts, and the hinge bolts are restored to their original positions after the object is loaded.

[0007] Optionally, the oil cylinders are arranged relative to each other and fixed to the welding frame of the clamp through oil cylinder pins.

[0008] Optionally, two slips are provided and are respectively arranged at opposite ends of the oil cylinder.

[0009] Optionally, a stopper for limiting the displacement of the slip is also provided on the outside of the slip.

[0010] Optionally, corresponding articulated seats and fixed seats are respectively provided on both sides of the top opening of the clamp welding frame, one end of the articulated bolt is hinged to the articulated seat through a pin shaft, and the other end is installed with the fixed seat through a nut.

[0011] Optionally, the cylinder has port A and port B. When high-pressure hydraulic oil enters the cylinder through port A, the cylinder drives the slips to clamp the drill rod or other objects; when high-pressure hydraulic oil enters the cylinder from port B, the hydraulic oil on one side of the cylinder flows out from port A, and the cylinder drives the slips to loosen the drill rod or other objects.

[0012] The beneficial effects of the present invention are as follows: the large-opening clamp for coal mines of the present invention has no spring, no rubber sleeve, a large range of motion, can pass drill rods and casings of different diameters, is simple and convenient to maintain, and has high reliability.

[0013] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0015] Figure 1 It is a structural schematic diagram of a large opening clamp for coal mines of the present invention;

[0016] Figure 2 for Figure 1 A partial cross-sectional view of

[0017] Figure 3 It is a three-dimensional stereogram of the present invention.

[0018] Figure numerals: clamp welding frame 1, pin shaft 2, slip 3, hinge bolt 4, nut 5, cylinder pin shaft 6, cylinder 7, stopper 8. DETAILED DESCRIPTION

[0019] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0020] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0021] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0022] See also Figure 1 to Figure 3 , which is a large-opening clamp for coal mines, includes a clamp welding frame 1, an oil cylinder 7 arranged in the clamp welding frame 1, and a slip 3 assembled on the oil cylinder 7; the top of the clamp welding frame 1 is also hinged with more than one hinge bolt 4, the oil cylinder 7 is relatively arranged, and is fixed to the clamp welding frame 1 through the oil cylinder pin 6, two slips 3 are provided, and are respectively arranged at the opposite ends of the oil cylinder 7, and a stopper 8 for limiting the displacement of the slip 3 is also provided on the outside of the slip 3, and corresponding hinge seats and fixed seats are respectively provided on both sides of the top opening of the clamp welding frame 1, one end of the hinge bolt 4 is hinged to the hinge seat through the pin 2, and the other end is installed with the fixed seat through the nut 5.

[0023] In this embodiment, when a drill rod or other large diameter object needs to be loaded from above the clamp, the nut 5 is loosened, the hinge bolt 4 is opened, and the object can be directly loaded. After the object is loaded, the hinge bolt 4 is restored to its original position and the nut 5 is tightened.

[0024] In this embodiment, the design of the slips 3 allows the clamp to have a larger opening distance, so that parts such as drill rods and casings of different diameters can be clamped.

[0025] In this embodiment, the oil cylinder 7 has port A and port B;

[0026] Clamping with a large opening gripper: When high-pressure hydraulic oil enters the cylinder 7 through port A, the cylinder 7 drives the slips 3 to clamp the drill pipe or other objects;

[0027] Loosening of the large opening clamp: When high-pressure hydraulic oil enters the cylinder 7 from the B port, the hydraulic oil on one side of the cylinder 7 flows out from the A port, and the cylinder 7 drives the slips 3 to loosen the drill rod or other objects.

[0028] The present invention replaces the existing clamping piston with a hydraulic cylinder 7, increases the opening distance of the clamp, and can clamp drill rods, casings and other parts with different diameters; drill rods, casings and other parts can be added or removed from the top of the clamp, which greatly facilitates the drilling construction of coal mine drilling rigs; the structure is simple, the number of parts is small, and maintenance is convenient.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A large opening clamp for coal mines, characterized in that: It includes a clamp welding frame, an oil cylinder arranged in the clamp welding frame, and a slip assembled on the oil cylinder; the top of the clamp welding frame is also hinged with more than one hinge bolt. When it is necessary to load a drill pipe or other large-diameter objects from the top of the clamp, the hinge bolts can be opened to directly load the objects, and the hinge bolts can be restored to their original positions after the objects are loaded.

2. A large opening clamp for coal mines according to claim 1, characterized in that: The oil cylinders are arranged relatively to each other and are fixed on the welding frame of the clamp through the oil cylinder pins.

3. A large opening clamp for coal mines according to claim 2, characterized in that: Two slips are provided and are respectively arranged at opposite ends of the oil cylinder.

4. A large opening clamp for coal mines according to claim 1, characterized in that: A stopper for limiting the slip displacement is also provided on the outside of the slip.

5. A large opening clamp for coal mines according to claim 1, characterized in that: Corresponding hinge seats and fixed seats are respectively arranged on both sides of the top opening of the clamp welding frame. One end of the hinge bolt is hinged with the hinge seat through a pin shaft, and the other end is installed with the fixed seat through a nut.

6. A large opening clamp for coal mines according to claim 1, characterized in that: The cylinder has port A and port B. When high-pressure hydraulic oil enters the cylinder through port A, the cylinder drives the slips to clamp the drill rod or other objects; when high-pressure hydraulic oil enters the cylinder from port B, the hydraulic oil on one side of the cylinder flows out from port A, and the cylinder drives the slips to loosen the drill rod or other objects.

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