Clamping device with adjustable supporting angle

Abstract

The utility model relates to the technical field of supporting clamps, in particular to a clamping device with an adjustable supporting angle, which comprises a mast and a clamping mechanism, the clamping mechanism is arranged on the mast, a clamping hole used for stabilizing a drill rod is arranged on the clamping mechanism, the clamping mechanism comprises a clamping plate and a telescopic supporting rod, and the telescopic supporting rod is arranged on the mast. The telescopic supporting rods are connected with the bottom of the clamping plate through the angle adjusting assembly, the clamping hole is formed in the center of the clamping plate in a penetrating mode, the two telescopic supporting rods are symmetrically arranged relative to the clamping hole, and an auxiliary clamping assembly is further arranged between the two telescopic supporting rods. According to the utility model, multi-angle rotation and rapid locking are realized, and the installation does not need ground anchor fixation, so that the working efficiency is greatly improved; and meanwhile, the stability of the drill rod and the stabilizing effect of the telescopic supporting rod are improved through the auxiliary clamping assembly, and displacement and sliding of the bottom of the telescopic supporting rod are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to support fixture technical field especially relates to a clamping device of adjustable support angle. BACKGROUND

[0002] In the field of geological exploration, engineering investigation, portable drilling machine is widely used in complex terrain operation due to its flexible and easy to carry. As a key component of portable drilling machine, the clamping device is usually installed at the bottom of the drilling tower (or mast) and the position above the orifice. It mainly clamps the drill pipe column stably in a specific process (such as connecting and discharging drill pipe, etc.), which is the key device to ensure the stability of drilling and other operation processes.

[0003] Due to the compact and lightweight design of the overall structure of the portable drilling machine, the clamping device is generally installed by unilateral connection, that is, it is fixed and connected to the bottom of the drilling tower (or mast) by four bolts on one side. There is no additional support structure at the bottom, forming a suspended state. Under normal operating conditions, for example, when the drill pipe column is clamped by the clamping device, the device can bear the total weight load of the suspended drill pipe column in the hole. At this time, the strength of its suspended structure can meet the basic operation requirements and will not deform or be damaged. However, in the actual construction process, there are often working conditions that exceed the rated capacity, such as drilling deepening, drill pipe column gravity exceeding the rated load, or instantaneous overload due to operation errors. In such scenarios, the tension on the clamping device will far exceed the normal gravity load, and its unilateral suspended structure will be difficult to withstand the excess load, which will easily cause irreversible deformation of the clamping device itself, and even cause structural damage such as shear fracture of the connecting part bolts. Not only will it cause equipment downtime and delay construction progress, but it may also cause accidents due to uncontrolled drill pipe (falling into the hole). SUMMARY

[0004] The utility model provides a clamping device with adjustable support angle to solve the above technical problem.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A clamping device with adjustable support angle, comprising a mast and a clamping mechanism, the clamping mechanism is installed on the mast, the clamping mechanism is provided with a clamping hole for stabilizing the drill pipe, the clamping mechanism comprises a clamping plate and a telescopic support rod, the telescopic support rod is connected with the bottom of the clamping plate through an angle adjusting assembly, the telescopic support rod is provided with two, the clamping hole is centrally arranged in the clamping plate, the two telescopic support rods are symmetrically arranged about the clamping hole, and an auxiliary clamping assembly is further arranged between the two telescopic support rods.

[0007] Further, the auxiliary clamping assembly comprises an auxiliary collar, a connecting screw rod and a jacking bolt, and two screw holes for the connecting screw rod to pass through are symmetrically arranged on the side wall of the auxiliary collar. After the telescopic support rod is fixed, the auxiliary clamping assembly provides auxiliary support for the radial constraint and clamping force of the drill pipe. The two symmetrically arranged screw holes can ensure the symmetrical transmission of force of the auxiliary collar when it is subjected to tension or torsion, avoiding deformation caused by eccentric loading of the auxiliary collar. At the same time, after the two screw holes are matched with the connecting screw rod, the positioning and clamping of the auxiliary collar are realized through the pre-tightening force of the jacking bolt. This structure can not only improve the radial stability of the drill pipe when the auxiliary clamping cooperates with the telescopic support rod to form an overall support system, but also can share part of the shear and bending moment when instantaneous overload occurs, thereby reducing the stress concentration of the main clamping piece and avoiding support failure caused by soft ground or vibration.

[0008] Further, one end of the connecting screw rod is provided with a limiting ring, and the diameter of the limiting ring is greater than the diameter of the screw hole. The limiting ring prevents the connecting screw rod from being separated from the auxiliary collar, and thus the auxiliary collar is located directly below the clamping hole to serve as auxiliary guiding for the drill pipe. Preferably, a space for accommodating the limiting ring is arranged at the screw hole of the inner wall of the auxiliary collar, i.e., the limiting ring does not affect the passage of the drill pipe through the inner ring of the auxiliary collar.

[0009] Further, the upper end of the telescopic support rod is provided with a positioning hole for the connecting screw rod to pass through, and the jacking bolt is threadedly connected with the connecting screw rod. After the jacking bolt fixes the connecting screw rods at both ends, the auxiliary collar and the two telescopic support rods are transversely connected and fixed. When the drill pipe passes through the clamping hole and the auxiliary collar in sequence, even if the ground below any telescopic support rod is soft or vibrates, the telescopic support rod will not collapse and fail to support, thereby ensuring stable support effect. At the same time, after the two telescopic support rods are fixed, the auxiliary collar is also fixed, and the auxiliary collar can provide auxiliary support for the guiding stability of the drill pipe.

[0010] Further, the inner diameter of the auxiliary collar is the same as the inner diameter of the clamping hole. The concentric arrangement between the auxiliary collar and the clamping hole ensures that the drill pipe is always on the same geometric center line when passing through the clamping hole and the auxiliary collar, thereby avoiding the increase or instability of the bending moment caused by radial eccentricity.

[0011] Further, the angle adjusting assembly is connected to the bottom of the clamping plate and the top end of the telescopic support rod respectively, and the angle adjusting assembly is a spherical hinge structure.

[0012] Further, the inclination angle adjusting range of the spherical hinge structure is 45°-90°, and the spherical hinge structure is provided with a locking knob.

[0013] Further, the telescopic support rod body is a hollow screw structure nested inside and outside, and the hollow screw structure is provided with a locking nut for clamping the adjusted length.

[0014] Further, the clamping plate is provided with a connecting plate connected to the connecting interface on the mast through a nut.

[0015] Further, the ground for supporting the mast is also included, and the ground is provided with a drill hole for the drill rod to pass through, and the drill hole corresponds to the clamping hole.

[0016] Compared with the prior art, the utility model has the following beneficial effects:

[0017] 1. Based on the structural strength hidden danger of the existing clamp under special working conditions, the telescopic support rod with adjustable height is arranged, and through adaptability adjustment, the structural rigidity, carrying capacity and anti-overload capacity of the clamping mechanism under complex working conditions can be improved, and the deformation and damage problems caused by excessive tension can be avoided.

[0018] 2. This utility model achieves multi-angle rotation and quick locking by setting an angle adjustment component, which solves the problem of the support structure being unadjustable or cumbersome to adjust in the prior art. Moreover, the installation does not require ground anchor fixation and can directly contact the bottom of the clamp and the working surface to achieve support, which greatly improves the work efficiency.

[0019] 3. By setting an auxiliary clamping component, this utility model can improve the stability of drill rod control after the telescopic support rod is fixed. At the same time, the fixing guide of the drill rod can also improve the gripping support effect of the telescopic support rod, and prevent the bottom of the telescopic support rod from shifting and sliding. Attached Figure Description

[0020] Fig. 1 This is a three-dimensional structural schematic diagram of the present invention;

[0021] Fig. 2 This is a schematic diagram of the planar operation of this utility model;

[0022] Fig. 3 This is a schematic diagram of the auxiliary clamping component;

[0023] Attached diagram labels: 1-Mast, 2-Drill rod, 3-Clamping hole, 4-Clamping plate, 5-Telescopic support rod, 6-Angle adjustment assembly, 7-Auxiliary collar, 8-Connecting screw, 9-Tightening bolt, 10-Screw hole, 11-Limiting ring, 12-Connecting plate, 13-Nut, 14-Ground, 15-Drill hole. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this utility model are only used to explain this utility model and are not intended to limit this utility model.

[0025] Example 1, as Figs. 1-3 As shown, this utility model discloses an adjustable support angle clamp, including a mast 1 and a clamping mechanism. The clamping mechanism is mounted on the mast 1 and has a clamping hole 3 for stabilizing a drill rod 2. The clamping mechanism includes a clamping plate 4 and telescopic support rods 5. The telescopic support rods 5 are connected to the bottom of the clamping plate 4 through an angle adjustment component 6. There are two telescopic support rods 5. The clamping hole 3 is disposed through the center of the clamping plate 4. The two telescopic support rods 5 are symmetrically arranged about the clamping hole 3. An auxiliary clamping component is also provided between the two telescopic support rods 5.

[0026] The auxiliary clamping assembly comprises an auxiliary collar 7, a connecting screw 8 and a jacking bolt 9. The sidewall of the auxiliary collar 7 is symmetrically provided with two screw holes 10 for the connecting screw 8 to pass through. Specifically, after the telescopic support rod 5 is fixed, the auxiliary clamping assembly provides auxiliary support for the radial constraint and clamping force of the drill pipe 2. The two symmetrically arranged screw holes 10 can ensure the symmetrical transmission of force of the auxiliary collar 7 when it is subjected to tension or torsion, avoiding deformation caused by eccentric loading of the auxiliary collar 7. At the same time, after the two screw holes 10 are matched with the connecting screw 8, the positioning and clamping of the auxiliary collar 7 are realized through the pre-tightening force of the jacking bolt 9. This structure can not only improve the radial stability of the drill pipe 2 when the auxiliary clamping cooperates with the telescopic support rod to form an overall support system, but also can share part of the shear and bending moment when instantaneous overload occurs, thereby reducing the stress concentration of the main clamping piece and avoiding support failure caused by soft or vibrating ground 14.

[0027] One end of the connecting screw 8 is provided with a limiting ring 11, and the diameter of the limiting ring 11 is greater than the diameter of the screw hole 10. Specifically, the limiting ring 11 makes the connecting screw 8 not come off the auxiliary collar 7, so that the auxiliary collar 7 is located directly below the clamping hole 3 and serves as auxiliary guide for the drill pipe 2. Preferably, a space for accommodating the limiting ring 11 is arranged at the inner wall screw hole 10 of the auxiliary collar 7, that is, the limiting ring 11 does not affect the drill pipe 2 passing through the inner ring of the auxiliary collar 7.

[0028] The upper end of the telescopic support rod 5 is provided with a positioning hole for the connecting screw 8 to pass through, and the jacking bolt 9 is threadedly connected with the connecting screw 8. Specifically, after the jacking bolt 9 fixes the connecting screw 8 at both ends, the auxiliary collar 7 and the two telescopic support rods 5 are transversely connected and fixed. When the drill pipe 2 passes through the clamping hole 3 and the auxiliary collar 7 in sequence, even if the ground 14 below any telescopic support rod 5 is soft or vibrates, the telescopic support rod 5 will not collapse and fail to support, ensuring stable support effect. At the same time, after the two telescopic support rods 5 are fixed, the auxiliary collar 7 is also fixed, and the auxiliary collar 7 can provide auxiliary support for the guiding stability of the drill pipe 2.

[0029] The inner diameter of the auxiliary collar 7 is the same as that of the clamping hole 3. Specifically, the auxiliary collar 7 and the clamping hole 3 are concentrically arranged, so that the drill pipe 2 always stays on the same geometric center line when passing through the clamping hole 3 and the auxiliary collar 7, avoiding the increase of bending moment or instability caused by radial eccentricity.

[0030] The angle adjusting assembly 6 is connected to the bottom of the clamping plate 4 and the top end of the telescopic support rod 5, respectively, and is a spherical hinge structure. Specifically, the spherical hinge structure provides multi-degree-of-freedom angle adjustment capability between the telescopic support rod 5 and the clamping plate 4, so that the telescopic support rod 5 can be reliably connected with the clamping plate 4 at different inclination angles and transmit axial or overturning force. The spherical hinge is composed of a ball and a socket, the ball end is fixed to the top end of the telescopic support rod 5 or connected through a connecting piece, and the socket end is fixed to the bottom bracket of the clamping plate 4. The ball can rotate and tilt in the socket to a large extent, thereby allowing the support rod to quickly conform to the ground 14 in uneven ground 14 or in a work scene requiring angle adaptation. The spherical hinge structure is a conventional technology, and its specific internal structure can be obtained from known materials by those skilled in the art according to requirements, which will not be described here.

[0031] The inclination adjustment range of the spherical hinge structure is 45°-90°, and the spherical hinge structure is provided with a locking knob. Specifically, the locking knob is a manually operated quick locking mechanism, which applies a friction locking force to the ball or socket by tightening the knob, thereby achieving angle locking without tools or only with simple tools. The matching of the locking knob and the spherical hinge structure is also a conventional technical means, and its structure is not the core technical solution of the present application, which will not be described here.

[0032] The telescopic support rod 5 is a hollow screw structure nested inside and outside, and is provided with a locking nut for tightening the adjusted length. Specifically, the outer tube is a hollow screw (with internal threads or guide grooves), and the inner tube is an internal screw matched with the threads or a rolling guide type, the overall length is changed by rotating the inner and outer screws or by locking and sliding fit, thereby realizing length adjustment. The hollow design not only reduces weight and facilitates mud and impurity cleaning, but also ensures the ability to transmit high thrust and pull force through threads. The locking nut is used to lock the inner and outer tubes after reaching the required length to prevent rotation or axial loosening under load or vibration; the locking nut can adopt double-nut reverse locking, wedge clamping sleeve or stop device with cross-section key to improve the anti-loosening ability. Its structure is not the core technical solution of the present application, which will not be described here.

[0033] The clamping plate 4 is provided with a connecting plate 12 connected to the connecting interface on the mast 1 through a nut 13. Specifically, the size and hole arrangement of the connecting plate 12 are standardized designed according to the reserved connecting interface on the mast 1, so that the clamping plate 4 is firmly connected with the flange or interface plate at the end of the mast 1 through the nut 13.

[0034] Also included is the ground 14 for supporting the mast 1, on which a drill hole 15 is reserved for the drill rod 2 to pass through, which corresponds to the clamping hole 3. Specifically, the ground 14 is regarded as the general term of the construction support surface in this application. To ensure the smoothness and safety of the drill rod 2 during clamping and passing, the ground 14 needs to be pre-drilled with a drill hole 15, which is coaxial with the clamping hole 3 on the clamping plate 4 in size and position, so that the drill rod 2 can pass through the drill hole 15 of the ground 14 smoothly when it is clamped and enters the hole position.

[0035] Example two, on the basis of example one, this embodiment proposes a specific working principle of the adjustable support angle clamping device.

[0036] Move the portable drilling machine to the upper part of the predetermined drill hole 15, and use the nut 13 to install the entire clamping mechanism on the bottom of the mast 1. Pass the two connecting screw rods 8 out from the inside of the screw hole 10 of the auxiliary collar 7, and make the free ends of the two connecting screw rods 8 pass through the positioning hole of the telescopic support rod 5, and then make the drill rod 2 pass through the clamping hole 3 and the auxiliary collar 7 in turn. Loosen the locking knobs on the ball hinge structure, so that the telescopic support rod 5 can swing freely. According to the actual flatness and inclination of the ground 14, manually adjust the approximate angle of each telescopic support rod 5, so that its bottom can contact the ground as smoothly as possible. After fixing the telescopic support rod 5, lock the two connecting screw rods 8 by the jacking bolt 9. At this time, the auxiliary collar 7 plays a supporting and stabilizing role in the longitudinal direction of the drill rod 2, and in turn, the drill rod 2 plays a stabilizing role for the two telescopic support rods 5, avoiding the telescopic support rod 5 from sliding or moving. After the length of the telescopic support rod 5 is fixed and the bottom is stably grounded, recheck and fine-tune the ball hinge angle to ensure that the telescopic support rod 5 is in the best stress state. Finally, completely tighten the locking knobs on the ball hinge structure to completely lock the hinge angle and form a rigid support.

[0037] Example three, on the basis of example one, this embodiment proposes an improved clamping mechanism.

[0038] The angle adjusting assembly 6 of this embodiment adopts a universal joint structure, which is composed of a pair of hinge shafts that are mutually 90°, and can realize a larger range of angle adjustment (the adjustment range is expanded to 30°-90°). The two ends of the universal joint are connected to the bottom of the clamping plate 4 and the top end of the telescopic support rod 5 through flanges, and are quickly locked through butterfly nuts. This structure is suitable for use on inclined ground 14 or complex terrain conditions, and can better adapt to the unevenness of the ground 14.

[0039] The telescopic support rod 5 adopts a two-stage telescopic structure, including three sleeve pipes of an outer pipe, a middle pipe and an inner pipe. The outer pipe and the middle pipe are adjusted by threads, and the middle pipe and the inner pipe are quickly positioned by a bolt type structure. The outer pipe is provided with a length scale outside, facilitating accurate adjustment of the support height. The multi-stage telescopic structure makes the telescopic ratio of the support rod larger, and can adapt to a larger range of height change requirements.

[0040] For the soft foundation working condition, the bottom of the telescopic support rod 5 is additionally provided with a support base plate. The support base plate is a circular steel plate, and the diameter is about 3-5 times the diameter of the support rod. The bottom is welded with an anti-skid rack. The larger ground contact area 14 can effectively reduce the pressure on the ground 14, prevent the support rod from sinking too much in the soft ground and affect the support effect.

[0041] The embodiment is particularly suitable for construction environments with complex geological conditions and poor ground bearing capacity, such as marshes, sandy land and other special terrains, and can provide more stable and reliable support for the clamp. The support structure adopts lightweight materials and compact design, and the overall weight is adapted to the carrying requirements of the portable drilling machine, and installation does not require ground anchor fixing, and can directly contact the bottom of the clamp and the working surface to realize support.

[0042] Of course, the present application can also have other various embodiments, and those skilled in the art can make various corresponding changes and modifications according to the present application without departing from the spirit and essence of the present application. However, these corresponding changes and modifications should all belong to the protection scope of the claims attached to the present application.

Claims

1. An adjustable support angle clamp, comprising a mast (1) and a clamping mechanism, the clamping mechanism being mounted on the mast (1), the clamping mechanism having a clamping hole (3) for stabilizing a drill rod (2), characterized in that: The clamping mechanism comprises a clamping plate (4) and telescopic supporting rods (5), the telescopic supporting rods (5) are connected with the bottom of the clamping plate (4) through an angle adjusting assembly (6), two telescopic supporting rods (5) are arranged, the clamping hole (3) is arranged in the center of the clamping plate (4), and the two telescopic supporting rods (5) are symmetrically arranged about the clamping hole (3).

2. A gripper with adjustable support angle according to claim 1, characterized in that: The auxiliary clamping assembly comprises an auxiliary sleeve ring (7), a connecting screw rod (8) and a jacking bolt (9), the side wall of the auxiliary sleeve ring (7) is symmetrically provided with two screw holes (10) for the connecting screw rod (8) to pass through.

3. A gripper with adjustable support angle according to claim 2, characterized in that: One end of the connecting screw rod (8) is provided with a limiting ring (11), and the diameter of the limiting ring (11) is greater than that of the screw hole (10).

4. A gripper with adjustable support angle according to claim 3, characterized in that: The upper end of the telescopic supporting rod (5) is provided with a positioning hole for the connecting screw rod (8) to pass through, and the jacking bolt (9) is in threaded connection with the connecting screw rod (8).

5. A support angle adjustable gripper according to claim 4, characterized in that: The inner diameter of the auxiliary sleeve ring (7) is the same as that of the clamping hole (3).

6. The adjustable angle of support holder of claim 1, wherein: The angle adjusting assembly (6) is connected with the bottom of the clamping plate (4) and the top end of the telescopic supporting rod (5) respectively, and the angle adjusting assembly (6) is a spherical hinge structure.

7. A support angle adjustable gripper as claimed in claim 6, wherein: The inclination adjusting range of the spherical hinge structure is 45°-90°, and the spherical hinge structure is provided with a locking knob.

8. The adjustable angle of support holder of claim 1, wherein: The telescopic supporting rod (5) is a hollow screw rod structure embedded inside and outside, and the hollow screw rod structure is provided with a locking nut for jacking the adjusted length.

9. The adjustable angle of support holder of claim 1, wherein: The clamping plate (4) is provided with a connecting plate (12), and the connecting plate (12) is connected with the connecting interface matched on the mast (1) through a nut (13).

10. The adjustable angle of support holder of claim 1, wherein: The ground (14) for supporting the mast (1) is further provided, the ground (14) is provided with a drill hole (15) for the drill rod (2) to pass through, and the drill hole (15) corresponds to the clamping hole (3).

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