A device for pulling out a gas drainage drill pipe

Abstract

The present invention provides a pulling device for a gas extraction drill rod, comprising a main hydraulic cylinder and a pulling hydraulic cylinder for driving the drill rod to move, wherein both ends of the piston rod of the main hydraulic cylinder are fixed on the device, and the cylinder body of the main hydraulic cylinder can slide on its piston rod by applying pressure; the pulling hydraulic cylinder is fixed on the device, and the piston rod of the pulling hydraulic cylinder can push the cylinder body of the main hydraulic cylinder to move in the direction of pulling out the drill rod. The present invention provides a pulling device for a gas extraction drill rod, and by setting the pulling hydraulic cylinder, the pulling force of the drill rod is increased, and the problem of the drill rod being stuck is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel drilling rigs, and in particular relates to a pulling device for a gas extraction drill rod on a tunnel drilling rig. Background Art

[0002] The tunnel drilling rig for coal mines is an important equipment used for extracting gas from mine tunnels. After the tunnel drilling rig drill tool completes drilling, a certain force needs to be applied to pull out the drill rod. The hydraulic cylinder for pulling out the drill rod configured on the drilling rig in the prior art usually has a pulling force of 15 tons. Due to the limitation of the track size, the cross-sectional area of ​​the hydraulic cylinder body cannot be increased. When the working pressure of the hydraulic system is constant, the pulling force generated by the hydraulic cylinder cannot be increased. It is often encountered that when the resistance to pulling out the drill rod is large, the pulling force is insufficient, resulting in the drill rod being stuck in the wellbore and unable to be removed, directly causing serious economic losses. Summary of the invention

[0003] In order to solve the above technical problems, the present invention provides a pulling device for a gas extraction drill rod. By setting a pulling hydraulic cylinder, the pulling force of the drill rod is increased, and the problem of the drill rod being stuck is solved.

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

[0005] A pulling device for a gas extraction drill rod comprises a main hydraulic cylinder and a pulling hydraulic cylinder for driving the drill rod to move. Both ends of the piston rod of the main hydraulic cylinder are fixed on the device, and the cylinder body of the main hydraulic cylinder can slide on its piston rod by applying pressure, thereby driving the drill rod to move; the pulling hydraulic cylinder is fixed on the device, and the piston rod of the pulling hydraulic cylinder can push the cylinder body of the main hydraulic cylinder to move in the direction of pulling out the drill rod. When pulling out the drill rod, the pulling hydraulic cylinder and the main hydraulic cylinder work together to pull out the drill rod, thereby increasing the pulling force of the drill rod and solving the problem of the drill rod being stuck.

[0006] The cam is provided with a plurality of camshafts, each of which ... When the drill rod is drilling, the main hydraulic cylinder moves toward the front baffle by pressurizing, providing stable pressure for drilling; when pulling out the drill rod, the main hydraulic cylinder moves toward the rear baffle by pressurizing, and at the same time, the pulling hydraulic cylinder is pressurized to extend its piston rod to support the pad, and then the pad supports the cylinder body of the main hydraulic cylinder and moves it toward the rear baffle, increasing the force of the cylinder body of the main hydraulic cylinder to withdraw, thereby increasing the pulling force of the drill rod.

[0007] A convex ring for connecting a power head is provided on the cylinder body of the main hydraulic cylinder. The power head is installed on the slide rail and can slide along the slide rail. At the same time, the lower part of the power head is sleeved on the cylinder body of the main hydraulic cylinder and is limited by the convex ring, so that when the cylinder body of the main hydraulic cylinder slides, it can drive the power head sleeved on the cylinder body of the main hydraulic cylinder to move together, thereby driving the drill rod clamped on the power head to move.

[0008] There are two pulling hydraulic cylinders, which are arranged in parallel. The combined force direction of the piston rods of the two pulling hydraulic cylinders is coaxial with the piston rod of the main hydraulic cylinder, ensuring the force balance of the main hydraulic cylinder, reducing wear and extending the service life of the main hydraulic cylinder.

[0009] An upper cover plate is arranged on the slide rail, and the upper cover plate is arranged above the ejection position of the piston rod of the pulling hydraulic cylinder, which not only enhances the structural strength of the slide rail, but also protects the piston rod of the pulling hydraulic cylinder.

[0010] A plurality of lower cover plates are arranged at intervals on the slide rail, and the lower cover plates are arranged below the main hydraulic cylinder and the pulling hydraulic cylinder to further enhance the structural strength of the slide rail.

[0011] The beneficial effects of the present invention are:

[0012] Compared with the prior art, by setting up a pulling hydraulic cylinder, the pulling hydraulic cylinder can work together with the main hydraulic cylinder to pull out the drill rod, thereby increasing the pulling force of the drill rod and solving the problem that the drill rod in the prior art is stuck due to insufficient pulling force. By setting up two symmetrical pulling hydraulic cylinders, the force balance of the main hydraulic cylinder is ensured, wear is reduced, and the service life of the main hydraulic cylinder is extended. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1It is a schematic structural diagram of the power head installation of the present invention;

[0014] Figure 2 It is a schematic structural diagram of the present invention;

[0015] Figure 3 It is a top view of the present invention;

[0016] Figure 4 It is a schematic structural diagram of the state of pulling out the drill pipe of the present invention.

[0017] In the figure: 1 - drill pipe, 2 - main hydraulic cylinder, 3 - pulling hydraulic cylinder, 4 - convex ring, 5 - slide rail, 6 - channel steel, 7 - front baffle, 8 - rear baffle, 9 - vertical plate, 10 - chute, 11 - backing plate, 12 - hole, 13 - upper cover plate, 14 - lower cover plate, 15 - power head. Specific embodiments

[0018] The technical solution of the present invention will be further described below, but the scope of protection is not limited thereto.

[0019] As Figures 1 to 4 shown, a pulling device for a gas drainage drill pipe includes a main hydraulic cylinder 2 and a pulling hydraulic cylinder 3 for driving the movement of the drill pipe 1. The two ends of the piston rod of the main hydraulic cylinder 2 are fixed on the device, and the cylinder body of the main hydraulic cylinder 2 can slide on its piston rod by pressurization, thereby driving the movement of the drill pipe 1; the pulling hydraulic cylinder 3 is fixed on the device, and the piston rod of the pulling hydraulic cylinder 3 can eject and hold the cylinder body of the main hydraulic cylinder 2 to move in the direction of pulling out the drill pipe 1. When pulling out the drill pipe 1, the drill pipe 1 is pulled out under the combined action of the pulling hydraulic cylinder 3 and the main hydraulic cylinder 2, increasing the pulling force of the drill pipe 1 and solving the problem of the drill pipe 1 getting stuck.

[0020] It also includes a slide rail 5, which is composed of two symmetrically arranged channel steels 6. The two ends of the two channel steels 6 are fixedly connected by a front baffle plate 7 and a rear baffle plate 8 respectively. A vertical plate 9 is arranged between the two channel steels 6 on one side close to the front baffle plate 7. The main hydraulic cylinder 2 is arranged on the symmetrical planes of the two channel steels 6, and the two ends of the piston rod of the main hydraulic cylinder 2 are respectively fixed on the vertical plate 9 and the rear baffle plate 8. A slide groove 10 is provided on the channel steel 6. A pad 11 that can slide along the slide groove 10 is also provided between the main hydraulic cylinder 2 and the vertical plate 9. The pad 11 is sleeved on the piston rod of the main hydraulic cylinder 2. The pulling hydraulic cylinder 3 is fixed on the front baffle plate 7. A hole 12 is provided on the vertical plate 9. The piston rod of the pulling hydraulic cylinder 3 can be pushed out through the hole 12 to support the pad 11 and drive the pad 11 to slide. When the drill rod 1 is drilling, the main hydraulic cylinder 2 moves toward the side of the front baffle 7 by applying pressure, providing stable pressure for drilling; when pulling out the drill rod 1, the main hydraulic cylinder 2 moves toward the side of the rear baffle 8 by applying pressure, and at the same time, the pulling hydraulic cylinder 3 is pressurized to extend its piston rod to support the pad 11, and then the pad 11 supports the cylinder body of the main hydraulic cylinder 2 and moves toward the side of the rear baffle 8, increasing the force of the cylinder body of the main hydraulic cylinder 2 to withdraw, thereby increasing the pulling force of the drill rod 1.

[0021] A convex ring 4 for connecting a power head is provided on the cylinder body of the master hydraulic cylinder 2. The power head 15 is installed on the slide rail 5 and can slide along the slide rail 5. At the same time, the lower part of the power head 15 is sleeved on the cylinder body of the master hydraulic cylinder 2 and is limited by the convex ring 4, so that when the cylinder body of the master hydraulic cylinder 2 slides, it can drive the power head 15 sleeved on the cylinder body of the master hydraulic cylinder 2 to move together, thereby driving the drill rod 1 clamped on the power head 15 to move.

[0022] There are two pulling hydraulic cylinders 3, which are arranged in parallel. The combined force direction of the piston rods of the two pulling hydraulic cylinders 3 is coaxial with the piston rod of the main hydraulic cylinder 2, ensuring the force balance of the main hydraulic cylinder 2, reducing wear and extending the service life of the main hydraulic cylinder 2. In this embodiment, the hydraulic pressure provided by the hydraulic system of the tunnel drilling rig is 21MPa, the inner diameter of the cylinder barrel of the main hydraulic cylinder 2 is 110mm, and the diameter of its piston rod is 55mm. The thrust provided is 15 tons. The force area diameter of the piston rod of the pulling hydraulic cylinder 3 is 80mm, and the thrust provided is 10.5 tons. Compared with the prior art, without changing the cross-sectional size of the pulling device, the conventional 15-ton pulling force is increased to 36 tons, which is increased by 2.4 times.

[0023] The slide rail 5 is provided with an upper cover plate 13 , which is arranged above the ejection position of the piston rod of the pulling hydraulic cylinder 3 , which not only enhances the structural strength of the slide rail 5 , but also protects the piston rod of the pulling hydraulic cylinder 3 .

[0024] A plurality of lower cover plates 14 are arranged at intervals on the slide rail 5 . The lower cover plates 14 are arranged below the main hydraulic cylinder 2 and the pulling hydraulic cylinder 3 to further enhance the structural strength of the slide rail 5 .

[0025] A pulling-out device for a gas drainage drill pipe provided by the present invention can pull out the drill pipe by the combined action of a pulling hydraulic cylinder and a main hydraulic cylinder, which increases the pulling force of the drill pipe and solves the problem of the drill pipe getting stuck due to insufficient pulling force in the prior art. By arranging two symmetrical pulling hydraulic cylinders, the force on the main hydraulic cylinder is balanced, wear is reduced, and the service life of the main hydraulic cylinder is prolonged.

Claims

1. A pulling-out device for a gas drainage drill pipe, characterized in that: The invention comprises a main hydraulic cylinder (2) and a pulling hydraulic cylinder (3) for driving a drill rod (1) to move. The two ends of the piston rod of the main hydraulic cylinder (2) are fixed on the device, and the cylinder body of the main hydraulic cylinder (2) can slide on its piston rod by applying pressure. The pulling hydraulic cylinder (3) is fixed on the device, and the piston rod of the pulling hydraulic cylinder (3) can push the cylinder body of the main hydraulic cylinder (2) to move in the direction of pulling out the drill rod (1). The invention also comprises a slide rail (5), the slide rail (5) being composed of two symmetrically arranged channel steels (6), the two ends of the two channel steels (6) being fixedly connected by a front baffle plate (7) and a rear baffle plate (8), a vertical plate (9) being arranged between the two channel steels (6) on one side close to the front baffle plate (7), the main hydraulic cylinder (2) being arranged on the symmetrical planes of the two channel steels (6), and the two ends of the piston rod of the main hydraulic cylinder (2) being fixed on the vertical plate (9) and the rear baffle plate (8), respectively, the channel steels ( A slide groove (10) is provided on the front plate (6), a pad (11) capable of sliding along the slide groove (10) is also provided between the main hydraulic cylinder (2) and the vertical plate (9), the pad (11) is sleeved on the piston rod of the main hydraulic cylinder (2), the pulling hydraulic cylinder (3) is fixed on the front baffle (7), a hole (12) is provided on the vertical plate (9), the piston rod of the pulling hydraulic cylinder (3) can be pushed out through the hole (12) to support the pad (11) and drive the pad (11) to slide, A convex ring (4) for connecting to a power head is arranged on the cylinder body of the main hydraulic cylinder (2).

2. The pulling device for a gas drainage drill pipe according to claim 1, wherein: There are two pulling hydraulic cylinders (3), which are arranged in parallel, and the combined force direction of the piston rods of the two pulling hydraulic cylinders (3) is coaxial with the piston rod of the main hydraulic cylinder (2).

3. The pulling device for a gas drainage drill pipe according to claim 1, characterized in that: An upper cover plate (13) is provided on the slide rail (5), and the upper cover plate (13) is arranged above the ejection position of the piston rod of the pulling hydraulic cylinder (3).

4. The pulling device for a gas drainage drill pipe according to claim 1, characterized in that: A plurality of lower cover plates (14) are arranged at intervals on the slide rail (5), and the lower cover plates (14) are arranged below the main hydraulic cylinder (2) and the pulling hydraulic cylinder (3).

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