A hydraulic amplification clamping device for a drilling vehicle and an assembly method thereof

Abstract

The present invention relates to a hydraulic amplification clamping device for a drilling vehicle and an assembly method thereof, and belongs to the technical field of mineral mining. The clamping device comprises an arc-shaped fixed slip, a cylinder base connecting ear and a spherical hinged ear are fixedly provided on the clamping box, an amplification lever is hingedly installed on the spherical hinged ear, a vertically arranged transmission rod is hingedly installed on the inner ends of the two amplification levers, an arc-shaped movable slip is hingedly installed on the lower end of the transmission rod, and a double telescopic high-pressure oil cylinder is hingedly installed between the outer end of the amplification lever and the cylinder base connecting ear. The use of the double telescopic high-pressure oil cylinder avoids fatigue damage of the disc spring and increases the service life of the clamping device. The assembly method comprises the following steps: dismantling parts → determining the specific installation position of each part → installing the amplification lever → installing the double telescopic high-pressure oil cylinder → installing the transmission rod → connecting the oil circuit. The assembly steps are reasonably designed, and have the characteristics of simple structure and operation, high safety and reliability, convenient maintenance, long service life, and no need to set up a hydraulic system.

Description

Technical Field

[0001] The invention relates to a hydraulic amplification clamping device for a drilling vehicle and an assembly method thereof, belonging to the technical field of mineral mining. Background Art

[0002] In the process of coal mining, drilling vehicles are widely used. The drilling vehicle is equipped with a clamping mechanism for clamping drill rods. The hydraulic cylinder and disc spring work together to clamp and loosen the drill rods. However, the long-term reciprocating use of the disc springs can easily cause fatigue damage or even brittle damage, seriously affecting the construction efficiency. In order to solve this problem, after repeated experiments, it was proposed to use a double telescopic high-pressure oil cylinder with a lever principle, amplify the force of the high-pressure oil cylinder, and work closely with the arc-shaped extended wear-resistant slips to complete the removal and installation of the drill rod. Summary of the invention

[0003] The purpose of the present invention is to provide a hydraulic amplification clamping device for a drilling vehicle and an assembly method thereof in order to solve the technical problem that the disc spring is easily damaged after long-term use, which affects the service life of the clamping device.

[0004] The present invention is achieved through the following technical solutions:

[0005] That is, a hydraulic magnification and clamping device for a drilling vehicle, comprising an arc-shaped fixed slip fixedly installed on a clamping box of the drilling vehicle, cylinder base connecting ears fixedly provided on the lower parts of both sides of the clamping box, two spherical hinged ears fixedly provided on the top of the clamping box, an amplification lever hingedly installed on the spherical hinged ears, a vertically arranged transmission rod hingedly installed on the inner ends of the two amplification levers, an arc-shaped movable slip hingedly installed on the lower end of the transmission rod, the arc-shaped movable slip and the arc-shaped fixed slip are symmetrically arranged up and down, and a double telescopic high-pressure cylinder is hingedly installed between the outer end of the amplification lever and the cylinder base connecting ear.

[0006] The clamping device of the present invention makes full use of the force transmission between the double telescopic high-pressure oil cylinder and the arc-shaped slips and the amplifying lever, and transmits the thrust of the double telescopic high-pressure oil cylinder to the transmission rod after the thrust is amplified by the amplifying lever. The transmission rod is hinged with the arc-shaped slips, and the clamping and loosening of the drill pipe are achieved by the telescopic movement of the double telescopic high-pressure oil cylinder. The use of the double telescopic high-pressure oil cylinder avoids fatigue damage of the disc spring and increases the service life of the clamping device.

[0007] A further improvement of the present invention is that the hinged connection points at both ends of the double telescopic high-pressure oil cylinder adopt a spherical hinge structure, which allows a small amount of offset in different axial directions, facilitates the assembly of the clamping device of the present invention, and requires lower processing accuracy of each component.

[0008] A further improvement of the present invention is that the inner surfaces of the arc-shaped fixed slips and the arc-shaped movable slips are fixed with a plurality of wear-resistant reinforcement strips, and the surface of the wear-resistant reinforcement strips is in an arc shape, thereby changing the previous point contact into line contact, multiplying the friction between the drill rod and the slips, and achieving a better clamping effect.

[0009] A further improvement of the present invention is that a rib is fixedly provided between the side of the spherical hinge ear and the top of the clamping box body, so as to reinforce the hinge point in the middle of the amplifying lever, namely the spherical hinge ear, to improve the structural strength and durability.

[0010] A further improvement of the present invention is that the oil return pipe and the oil inlet pipe on the double telescopic high-pressure oil cylinder are connected to the hydraulic system of the drilling vehicle through a tee.

[0011] The present invention also provides an assembly method of a hydraulic amplification clamping device, comprising the following steps:

[0012] S1: Remove the original clamping box from the drilling vehicle, and remove the disc spring, slips, pins, fixed wedges, and oil pipes one by one;

[0013] S2: Make full use of the structure of the original clamping box. First, weld the original clamping box into a hexahedron shape, find the specific positions of the cylinder base hinge ears and spherical hinge ears on the side and top of the clamping box, and then find the center of the transmission rod and drill rod for drilling;

[0014] S3: Connect and assemble the processed amplifying lever with the double telescopic high-pressure oil cylinder and the spherical hinge ear through the pin shaft;

[0015] S4: Articulate the hinged ear of the cylinder base with the double telescopic high-pressure cylinder and apply grease to the hinged joint;

[0016] S5: The two ends of the transmission rod are respectively hinged to the amplifying lever and the arc-shaped fixed slip through the pins;

[0017] S6: Use a tee to connect the main liquid supply and main return lines to the oil return pipe, double telescopic high-pressure cylinder, and oil inlet pipe.

[0018] The assembly steps of the clamping device are reasonably designed, and it has the characteristics of simple structure and operation, high safety and reliability, convenient maintenance, long service life, and no need to set up a hydraulic system.

[0019] A further improvement of the present invention is that in step S3, a shaft sleeve is installed outside the pin shaft and filled with grease.

[0020] A further improvement of the present invention is that after step S6, there is also step S7: start the machine for trial operation, check the sealing and lubrication conditions of each connection part, operate each control valve plate to check the movement of the hydraulic cylinder and each rod, and adjust the system pressure in time.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] 1. The clamping device of the present invention makes full use of the force transmission between the double telescopic high-pressure oil cylinder and the arc-shaped slips and the amplifying lever. The thrust of the double telescopic high-pressure oil cylinder is amplified by the amplifying lever and then transmitted to the transmission rod. The transmission rod is hinged with the arc-shaped slips. The clamping and loosening of the drill pipe is achieved by the telescopic movement of the double telescopic high-pressure oil cylinder. The use of the double telescopic high-pressure oil cylinder avoids fatigue damage of the disc spring and increases the service life of the clamping device.

[0023] 2. The assembly steps of the clamping device of the present invention are reasonably designed, and it has the characteristics of simple structure and operation, high safety and reliability, convenient maintenance, long service life, and no need to set up a hydraulic system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution of the present invention, the accompanying drawings required for use in the description will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0025] Figure 1 It is a structural schematic diagram of a specific implementation mode of the present invention.

[0026] Figure 2 It is a schematic diagram of the cross-sectional structure of the arc-shaped fixed slips and the arc-shaped movable slips in a specific implementation manner of the present invention.

[0027] In the figure: 1. oil return pipe; 2. double telescopic high-pressure oil cylinder; 3. oil inlet pipe; 4. connecting ear of oil cylinder base; 5. spherical hinge ear; 6. transmission rod; 7. magnifying lever; 8. arc-shaped fixed slip; 9. drill rod; 10. clamping box; 11. arc-shaped movable slip; 12. wear-resistant reinforcement strip. DETAILED DESCRIPTION

[0028] The specific implementation modes of the present invention are further described in detail below with reference to the accompanying drawings.

[0029] like Figure 1 , Figure 2A hydraulic amplification and clamping device for a drilling vehicle is shown, comprising an arc-shaped fixed slip 8 fixedly mounted on a clamping box 10 of the drilling vehicle, cylinder base connecting ears 4 are fixedly mounted on the lower parts of both sides of the clamping box 10, two spherical hinged ears 5 are fixedly mounted on the top of the clamping box 10, an amplification lever 7 is hingedly mounted on the spherical hinged ears 5, a vertically arranged transmission rod 6 is hingedly mounted on the inner ends of the two amplification levers 7, an arc-shaped movable slip 11 is hingedly mounted on the lower end of the transmission rod 6, the arc-shaped movable slip 11 and the arc-shaped fixed slip 8 are symmetrically arranged up and down, and a double telescopic high-pressure cylinder 2 is hingedly mounted between the outer end of the amplification lever 7 and the cylinder base connecting ear 4.

[0030] The clamping device of the present invention makes full use of the force transmission between the double telescopic high-pressure oil cylinder 2 and the arc-shaped slips and the amplifying lever 7, and transmits the thrust of the double telescopic high-pressure oil cylinder 2 to the transmission rod 6 after the thrust is amplified by the amplifying lever 7. The transmission rod 6 is hinged with the arc-shaped slips, and the clamping and loosening of the drill rod 9 are achieved by the telescopic movement of the double telescopic high-pressure oil cylinder 2. The use of the double telescopic high-pressure oil cylinder 2 avoids fatigue damage of the disc spring and increases the service life of the clamping device.

[0031] The hinged connection points at both ends of the double telescopic high-pressure oil cylinder 2 are both spherical hinged structures, which allow a small amount of offset in different axial directions, facilitate the assembly of the clamping device of the present invention, and have lower requirements on the processing accuracy of each component.

[0032] The inner surfaces of the arc-shaped fixed slips 8 and the arc-shaped movable slips 11 are fixed with a plurality of wear-resistant reinforcement strips 12, and the surface of the wear-resistant reinforcement strips 12 is arc-shaped. The previous point contact is changed to line contact, which multiplies the friction between the drill pipe and the slips and achieves a better clamping effect.

[0033] Among them, a rib is fixedly provided between the side of the spherical hinge ear 5 and the top of the clamping box 10. The hinge point in the middle of the amplifying lever 7, i.e., the spherical hinge ear 5, is reinforced to improve the structural strength and durability.

[0034] The oil return pipe 1 and the oil inlet pipe 3 on the double telescopic high-pressure oil cylinder 2 are connected to the hydraulic system of the drilling vehicle through a tee.

[0035] The present invention also provides an assembly method of a hydraulic amplification clamping device, comprising the following steps:

[0036] S1: Remove the original clamping box 10 from the drilling vehicle, and remove the disc spring, slips, pins, fixed wedges, and oil pipes one by one;

[0037] S2: Make full use of the structure of the original clamping box 10. First, weld the original clamping box 10 into a hexahedron shape, and find the specific positions of the cylinder base hinge ear 4 and the spherical hinge ear 5 on the side and top surface of the clamping box 10, and then find the center of the transmission rod 6 and the drill rod 9 to drill holes;

[0038] S3: The processed amplifying lever 7 is connected and assembled with the double telescopic high-pressure oil cylinder 2 and the spherical hinge ear 5 through a pin shaft, and a sleeve is installed outside the pin shaft and filled with grease;

[0039] S4: Articulate the cylinder base hinge ear 4 with the double telescopic high-pressure cylinder 2, and apply grease to the hinge;

[0040] S5: The two ends of the transmission rod 6 are respectively hinged to the amplifying lever 7 and the arc-shaped fixed slip 8 through the pins;

[0041] S6: Use a tee to connect the main liquid supply and main liquid return pipelines to the oil return pipe 1, the double telescopic high-pressure cylinder 2, and the oil inlet pipe 3.

[0042] S7: Start the machine for trial operation, check the sealing and lubrication conditions of each connection part, operate each control valve to check the movement of the hydraulic cylinder and each rod, and adjust the system pressure in time.

[0043] The assembly steps of the clamping device are reasonably designed, and it has the characteristics of simple structure and operation, high safety and reliability, convenient maintenance, long service life, and no need to set up a hydraulic system.

[0044] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referenced to each other.

[0045] The terms "upper", "lower", "outer side", "inner side", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish the relative relationship in position if they exist, and do not need to be qualitative. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described here can be implemented in an order other than those illustrated or described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0046] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An assembly method for a hydraulic amplification clamping device for a drilling vehicle, characterized in that: The hydraulic amplification clamping device comprises an arc-shaped fixed slip (8) fixedly mounted on a drilling vehicle clamping box (10), a cylinder base connecting ear (4) fixedly mounted on the lower part of both sides of the clamping box (10), two spherical hinged ears (5) fixedly mounted on the top of the clamping box (10), an amplification lever (7) hingedly mounted on the spherical hinged ears (5), a vertically arranged transmission rod (6) hingedly mounted on the inner ends of the two amplification levers (7), an arc-shaped movable slip (11) hingedly mounted on the lower end of the transmission rod (6), the arc-shaped movable slip (11) and the arc-shaped fixed slip (8) are symmetrically arranged up and down, and the amplification lever (7) is hingedly mounted on the inner ends of the two amplification levers (7). A double telescopic high-pressure oil cylinder (2) is hingedly installed between the outer end of the large lever (7) and the connecting ear (4) of the oil cylinder base; the hinged connection points at both ends of the double telescopic high-pressure oil cylinder (2) both adopt a spherical hinged structure; a plurality of wear-resistant reinforcement strips (12) are fixedly provided on the inner surfaces of the arc-shaped fixed slips (8) and the arc-shaped movable slips (11), and the surface of the wear-resistant reinforcement strips (12) is in an arc shape; a rib plate is fixedly provided between the side of the spherical hinge ear (5) and the top of the clamping box (10); the oil return pipe (1) and the oil inlet pipe (3) on the double telescopic high-pressure oil cylinder (2) are connected to the hydraulic system of the drilling vehicle through a tee; The assembly method comprises the following steps: S1: Remove the original clamping box (10) from the drilling vehicle, and remove the disc spring, slips, pins, fixed wedges, and oil pipes one by one; S2: Making full use of the structure of the original clamping box (10), firstly welding the original clamping box (10) into a hexahedron, and finding the specific positions of the cylinder base connecting ear (4) and the spherical hinge ear (5) on the side and top surfaces of the clamping box (10), and then finding the center of the transmission rod (6) and the drill rod (9) for drilling; S3: Connecting and assembling the manufactured amplifying lever (7) with the double telescopic high-pressure oil cylinder (2) and the spherical hinge ear (5) through a pin shaft; S4: Articulate the cylinder base connecting ear (4) and the double telescopic high-pressure cylinder (2), and apply grease to the articulated joint; S5: The two ends of the transmission rod (6) are respectively hinged to the amplifying lever (7) and the arc-shaped fixed slip (8) through a pin; S6: Use a tee to connect the main liquid supply and main liquid return pipelines to the oil return pipe (1), the double telescopic high-pressure oil cylinder (2), and the oil inlet pipe (3).

2. The assembly method of the hydraulic amplification clamping device for a drilling vehicle according to claim 1, characterized in that: In step S3, a sleeve is installed outside the pin shaft and grease is added.

3. The assembly method of the hydraulic amplification clamping device for a drilling vehicle according to claim 1, characterized in that: After step S6, there is also step S7: start the machine for trial operation, check the sealing and lubrication conditions of each connection part, operate each control valve plate to check the movement of the hydraulic cylinder and each rod, and adjust the system pressure in time.

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