A vise clamping structure and a vise for horizontal directional drilling machine

Abstract

The application relates to a vise clamping structure and a vise for a horizontal directional drilling machine. The first clamping block and the second clamping block are controlled by the extension and retraction of a single-sided telescopic cylinder. When the telescopic cylinder is extended, the first clamping block is driven to move towards the drill rod. After the first clamping block abuts against the drill rod, the first clamping block is limited by a limiting assembly or the drill rod, and when the telescopic cylinder continues to extend, the vise support slides along the base to drive the second clamping block to move towards the first clamping block, so that the drill rod can be clamped. The extension and retraction of the rotary cylinder can drive the second vise and the drill rod thereon to rotate under the limitation of the arc-shaped section of the second sliding groove, so that the two drill rods can be disassembled. The limiting assembly can limit the first clamping block at both ends, so that the telescopic cylinder can be automatically centered and reset, and the wear of the connecting thread of the drill rod caused by the eccentricity between the clamping block and the drill rod can be overcome.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of engineering machinery, and particularly relates to a vise clamping structure and a vise for a horizontal directional drilling machine. BACKGROUND

[0002] The horizontal directional drilling machine is a construction machine for drilling and laying various underground public facilities (pipes, cables, etc.) without destroying the surface layer of the environment, and is widely used in non-excavation engineering for laying flexible pipelines such as water supply, power supply, telecommunications, natural gas, coal gas, and oil without destroying the surface buildings.

[0003] The construction process of the horizontal directional drilling machine mainly realizes directional non-excavation crossing through directional drilling, and realizes expansion of the guide hole to the required size of the project by using a reamer; and then realizes laying of the pipeline route by back dragging. In the construction process, drilling and back dragging are needed by using a drill rod, and in this process, the drill rod needs to be connected by a connecting thread one by one to realize the length and span required by the project, so that the efficiency of installation and disassembly of the drill rod directly affects the construction efficiency of the whole project, and at the same time, the service life of the connecting thread of the drill rod directly affects the construction cost of the whole project.

[0004] In the construction process of the horizontal directional drilling machine, the vise device is used to realize the unfastening action between the drill rods, the clamping block is pushed by the clamping cylinder to make the clamping block tightly hold the drill rod, and then the clamping block is driven by the rotating cylinder to realize the unfastening between the drill rods.

[0005] The vise structure used in the prior art horizontal directional drilling machine is shown in Figure 1 The working mode thereof is that the left and right clamping cylinders (the left clamping cylinder 11 and the right clamping cylinder 14) work synchronously to realize effective clamping of the left clamping block 12 and the right clamping block 13 on the drill rod 5, and in order to reduce the eccentricity, the rotating cylinder is used to drive the clamping block to rotate to the center of the drill rod. However, this vise device structure is complex, the synchronization of the cylinder action is required to be high, the cost is high, and the working efficiency is low. SUMMARY

[0006] In view of the above problems existing in the prior art, the present application provides a vise clamping structure and a vise for a horizontal directional drilling machine, which can realize automatic centering of the clamping block and overcome the problem of wear of the connecting thread of the drill rod caused by eccentricity of the clamping block and the drill rod.

[0007] To achieve the above purpose, the technical scheme provided by the present application is as follows:

[0008] In a first aspect, the application provides a vise clamping structure, comprising a base, a vise support, a telescopic cylinder, a first clamping block and a second clamping block, the vise support is placed on the base, and the vise support is fixedly and slidably connected with the base; one end of the telescopic cylinder is rotationally connected with the vise support, and the other end is connected with the first clamping block; the second clamping block is arranged on the vise support and cooperates with the first clamping block to clamp; a limiting assembly is arranged on the base, and the limiting assembly is used for limiting the stroke range of the first clamping block.

[0009] Optionally, the limiting assembly comprises a limiting block fixed on the base, a sliding groove is formed in the limiting block, the sliding groove is arranged along the telescopic direction of the telescopic cylinder, and the first clamping block slides along the sliding groove.

[0010] Optionally, when the first clamping block does not move to the limit of the stroke range, the vise support is fixed by using the friction force between the vise support and the base; when the first clamping block moves to the limit of the stroke range, the telescopic cylinder is used to overcome the friction force to realize the sliding between the vise support and the base.

[0011] Optionally, the vise support is connected with the telescopic cylinder through a first pin shaft, and the telescopic cylinder is connected with the first clamping block through a second pin shaft.

[0012] Optionally, the second clamping block is arranged on the side of the first clamping block away from the telescopic cylinder.

[0013] In a second aspect, the application further provides a vise for a horizontal directional drilling rig, comprising the above-mentioned vise clamping structure.

[0014] Optionally, the vise further comprises a first vise and a second vise, the first vise and the second vise are both provided with the vise clamping structure, the first vise and the second vise clamp two drill rods through the vise clamping structure thereon, and the two drill rods are threadedly connected; the second vise can rotate around the axis of the drill rod.

[0015] Optionally, the vise further comprises a rotary cylinder, and the second vise is connected with the telescopic end of the rotary cylinder;

[0016] The limiting assembly on the first vise comprises a first limiting block fixed on the base of the first vise, a first sliding groove is formed below the first limiting block, and the top end of the first clamping block on the first vise is clamped in and slidably connected with the first sliding groove;

[0017] The limiting assembly on the second vise comprises a second limiting block fixed on the base of the second vise, a second sliding groove is formed above the second limiting block, and the first clamping block on the second vise is slidably connected with the second sliding groove through a limiting pin shaft;

[0018] The first sliding groove is a long strip-shaped clamping groove arranged along the extension direction of the telescopic cylinder; the second sliding groove comprises a long strip-shaped clamping groove arranged along the extension direction of the telescopic cylinder and an arc-shaped groove, the arc-shaped groove is arranged at one end of the long strip-shaped clamping groove close to the drill rod, and the arc-shaped groove is used for limiting the limiting pin shaft when the second vice rotates along the drill rod.

[0019] Compared with the prior art, the present application has at least the following beneficial effects:

[0020] The present application can control the clamping of the first clamping block and the second clamping block by the telescopic cylinder on one side, that is, the telescopic cylinder is elongated to drive the first clamping block to move towards the drill rod; after the first clamping block abuts against the drill rod, the first clamping block is limited by the limiting assembly or the drill rod, and when the telescopic cylinder continues to elongate, the vice support slides along the base to drive the second clamping block to move towards the first clamping block, so that the drill rod can be clamped; by the extension of the rotary cylinder, under the limitation of the arc-shaped section of the second sliding groove, the second vice drives the drill rod thereon to rotate, so that the two drill rods can be disassembled. The present application can realize automatic centering and automatic resetting of the telescopic cylinder by the limiting effect of the limiting assembly on the first clamping block at both ends, which overcomes the wear of the drill rod connecting thread caused by the misalignment of the clamping block and the drill rod, improves the service life of the drill rod, and improves the efficiency of construction. At the same time, the present application reduces the number of telescopic cylinders, which reduces the cost and saves the occupied space. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0022] Figure 1 A structure diagram of a vice used in a horizontal directional drilling machine in the prior art;

[0023] Figure 2 A structure diagram of a vice clamping structure in the present application;

[0024] Figure 3 A structure diagram of a vice used in a horizontal directional drilling machine in the present application;

[0025] Figure 4 A structure diagram of a second vice in the present application;

[0026] Explanation of reference signs:

[0027] 1. Vise support; 2. Telescopic cylinder; 3. Base; 4. First clamping block; 5. Drill rod; 6. Second clamping block; 7. Limiting assembly; 71. Mounting seat; 72. Limiting block; 73. First sliding groove; 74. Second sliding groove; 75. Limiting pin; 8. First pin; 9. Second pin; 10. Rotary cylinder; 11. Left clamping cylinder; 12. Left clamping block; 13. Right clamping block; 14. Right clamping cylinder; 15. First vise; 16. Second vise. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit this application or its application or use.

[0029] Example 1

[0030] like Figure 2 As shown, a vise clamping structure includes a base 3, a vise support 1, a telescopic cylinder 2, a first clamping block 4, and a second clamping block 6. The vise support 1 is placed on the base 3, and the vise support 1 and the base 3 are fixedly and slidably connected. One end of the telescopic cylinder 2 is rotatably hinged to the vise support 1, and the other end is connected to the first clamping block 4. The second clamping block 6 is disposed on the vise support 1 and cooperates with the first clamping block 4 to clamp. A limit component 7 is provided on the base 3 to limit the travel range of the first clamping block 4.

[0031] When clamping drill rod 5 or other objects to be clamped, telescopic cylinder 2 extends, causing the first clamping block 4 to move closer to drill rod 5. After the first clamping block 4 presses against drill rod 5, it can no longer move forward under the action of limiting component 7. At this time, telescopic cylinder 2 continues to extend, and vise support 1 slides along base 3. Vise support 1 causes the second clamping block 6 to move closer to the first clamping block 4, and the first clamping block 4 and the second clamping block 6 can clamp drill rod 5.

[0032] The telescopic cylinder 2 retracts, causing the first clamping block 4 to move away from the mast; after the telescopic cylinder 2 retracts until the first clamping block 4 abuts against the side of the sliding groove away from the drill rod 5, the telescopic rod continues to retract, and the vise support 1 slides along the base 3, causing the second clamping block 6 to move away from the mast, thus releasing the drill rod 5.

[0033] This application achieves automatic centering and automatic reset of the telescopic cylinder 2 by limiting the first clamping block 4 at both ends of the limiting component 7, overcoming the wear of the connecting thread of the drill rod 5 caused by the misalignment between the clamping block and the drill rod 5, and improving the service life of the drill rod 5.

[0034] Example 2

[0035] The difference between this embodiment and the previous one is that the vise support 1 is hinged to the telescopic cylinder 2 via the first pin 8, and the telescopic cylinder 2 is hinged to the first clamping block 4 via the second pin 9. The second clamping block 6 is located on the side of the first clamping block 4 opposite to the telescopic cylinder 2.

[0036] The limiting component 7 includes a limiting block 72 fixed to the base 3 by a mounting base 71. The limiting block 72 has a sliding groove arranged along the telescopic cylinder 2. The first clamping block 4 slides along the sliding groove. By limiting the sliding groove, the first clamping block 4 can only move between a first position (the side wall of the sliding groove near the telescopic cylinder 2) and a second position (the side wall of the sliding groove near the drill rod 5).

[0037] When the first clamping block 4 has not moved to the limit of its stroke range, the vise support 1 is fixed by the friction between it and the base 3; when the first clamping block 4 moves to the limit of its stroke range, the power of the telescopic cylinder 2 to extend and retract overcomes the friction and allows the vise support 1 to slide between the base 3.

[0038] When it is necessary to clamp the drill rod 5, the telescopic cylinder 2 extends, and the first clamping block 4 abuts against the drill rod 5, reaching the second position. At this time, the first clamping block 4 cannot move towards the drill rod 5. The telescopic cylinder 2 continues to extend, and under the pushing force of the telescopic cylinder 2, the end of the telescopic cylinder 2 away from the drill rod 5 begins to move, driving the vise support 1 to slide along the base 3. The second clamping block 6 moves towards the first clamping block 4, thereby realizing the active centering clamping of the first clamping block 4.

[0039] Furthermore, in this embodiment, a limiting block 72 is provided on the base 3 to limit the sliding of the vise support 1. When the second clamping block 6 moves to the point where the first clamping block 4 clamps the drill rod 5 and the center position of the drill rod 5 is equal, the vise support 1 abuts against the limiting block 72, so that the vise support 1 can no longer move to the left, thereby ensuring that the clamping of the drill rod 5 by the second clamping block 6 and the first clamping block 4 is concentric.

[0040] Example 3

[0041] This embodiment provides a vise for a horizontal directional drilling rig, such as... Figure 3 As shown, it includes a first vise 15 and a second vise 16, both of which are provided with the vise clamping structure in Embodiment 2.

[0042] The first vise 15 and the second vise 16 clamp the two drill rods 5 respectively through their vise clamping structures, and the two drill rods 5 are threaded together; the second vise 16 can rotate around the axis of the drill rod 5.

[0043] Also included is a rotating cylinder 10, the second vice 16 is hinged to the telescopic end of the rotating cylinder 10, specifically the bottom surface of the vice support 1 on the second vice 16 is hinged to the rotating cylinder 10.

[0044] As Figure 2 The limiting assembly 7 on the first vice 15 includes a first limiting block 72 fixed on the base 3 thereof, a first sliding slot 73 is formed below the first limiting block 72, and the top end of the first clamping block 4 is clamped in the first sliding slot 73 and is in sliding connection with the first sliding slot 73; the first sliding slot 73 is a long strip-shaped clamping slot arranged along the telescopic direction of the telescopic cylinder 2.

[0045] As Figure 4 The limiting assembly 7 on the second vice 16 includes a second limiting block 72 (arranged inside the side wall of the base 3) fixed on the base 3 thereof, a second sliding slot 74 is formed above the second limiting block 72, and the first clamping block 4 is in sliding connection with the second sliding slot 74 through a limiting pin shaft 75; the second sliding slot 74 includes a long strip-shaped clamping slot arranged along the telescopic direction of the telescopic cylinder 2 and an arc-shaped slot, the arc-shaped slot is arranged at one end of the long strip-shaped clamping slot close to the drill rod 5, the arc-shaped slot is an arc shape with the axis of the drill rod 5 as the center, the arc-shaped slot is in communication with the long strip-shaped clamping slot, and the arc-shaped slot is used for limiting the limiting pin shaft 75 when the second vice 16 rotates along the drill rod 5, so that the pin shaft rotates along the axis of the drill rod 5 as the center in the arc-shaped slot.

[0046] The first vice 15 and the second vice 16 clamp two drill rods 5 through the vice clamping structures thereon, respectively, the rotating cylinder 10 is elongated to drive the vice support 1 on the second vice 16 to rotate, the pin shaft moves along the arc-shaped slot under the limitation of the arc-shaped slot, drives the drill rod 5 in the clamping state on the second vice 16 to rotate, and thus the hitching between the drill rods 5 can be released.

[0047] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connecting" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0048] The above is only the preferred embodiment of the present application, it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, these improvements and modifications should also be regarded as the protection scope of the present application.

Claims

1. A vise clamping structure, characterized by comprising: The vise clamping structure comprises a base, a vise support, an extension cylinder, a first clamping block and a second clamping block, the vise support is placed on the base, and the vise support is fixedly and slidably connected with the base; one end of the extension cylinder is rotationally connected with the vise support, and the other end is connected with the first clamping block; the second clamping block is arranged on the vise support and cooperates with the first clamping block to clamp; a limiting assembly is arranged on the base, and the limiting assembly is used for limiting the stroke range of the first clamping block.

2. The vise clamping structure according to claim 1, wherein The limiting assembly comprises a limiting block fixed on the base, a sliding groove is formed in the limiting block, and the sliding groove is arranged along the extension direction of the extension cylinder; and the first clamping block slides along the sliding groove.

3. The vise clamping structure according to claim 2, wherein When the first clamping block does not move to the limit of the stroke range, the vise support is fixed by the friction force between the vise support and the base; when the first clamping block moves to the limit of the stroke range, the power of the extension and retraction of the extension cylinder is used to overcome the friction force to realize the sliding between the vise support and the base.

4. The vise clamping structure according to claim 1, wherein The vise support is connected with the extension cylinder through a first pin shaft, and the extension cylinder is connected with the first clamping block through a second pin shaft.

5. The vise clamping structure according to claim 1, wherein The second clamping block is arranged on the side of the first clamping block away from the extension cylinder.

6. A vice for a horizontal directional drilling machine, characterized in that The vise clamping structure of any one of claims 1-5 is comprised.

7. The vise for horizontal directional drilling machines according to claim 6, characterized in that, The first vise and the second vise are further comprised, the vise clamping structure is arranged on each of the first vise and the second vise, the first vise and the second vise clamp two drill rods through the vise clamping structure thereon respectively, and the two drill rods are threadedly connected; the second vise can rotate around the axis of the drill rod.

8. The vise for horizontal directional drilling machines according to claim 7, characterized in that, A rotary cylinder is further comprised, and the second vise is connected with the extension end of the rotary cylinder; The limiting assembly on the first vise comprises a first limiting block fixed on the base of the first vise, a first sliding groove is formed below the first limiting block, and the top end of the first clamping block on the first vise is clamped in and slidably connected with the first sliding groove; The limiting assembly on the second vise comprises a second limiting block fixed on the base of the second vise, a second sliding groove is formed above the second limiting block, and the first clamping block on the second vise is slidably connected with the second sliding groove through a limiting pin shaft; The first sliding groove is a long strip-shaped clamping groove arranged along the extension direction of the extension cylinder; and the second sliding groove comprises a long strip-shaped clamping groove and an arc-shaped groove arranged along the extension direction of the extension cylinder, the arc-shaped groove is arranged at one end of the long strip-shaped clamping groove close to the drill rod, and the arc-shaped groove is used for limiting the limiting pin shaft when the second vise rotates along the drill rod.

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