Drill rod clamping device

Abstract

The utility model relates to the technical field of drilling machines, in particular to a drill rod clamping device which comprises a support, the end of the support is fixedly connected with a gripper, the gripper comprises an assembly frame, the assembly frame is rotatably connected with two clamping jaws, the two clamping jaws are symmetrically distributed, the adjacent sides of the clamping jaws are provided with an operation cavity, and the operation cavity is communicated with the assembly frame. A telescopic cylinder is fixedly connected to the support, the telescopic cylinder can stretch into and abut against the operation cavities of the two clamping jaws at the same time when extending, the telescopic cylinder drives the two clamping jaws in the gripper to conduct clamping by applying force in the vertical direction, the clamping jaws are in an open state naturally, and a drill rod can enter the position between the two clamping jaws; the telescopic cylinder extends to drive the two clamping jaws to clamp a drill rod, the telescopic cylinder controls the two telescopic rods to extend at the same time to drive the two grippers to grab the drill rod, the drill rod is clamped more firmly, the two clamping jaws move at the same time, the opening angle is larger, and the drill rod is conveniently picked up.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of drilling machine, especially relates to a drill rod clamping device. BACKGROUND

[0002] In the drilling process of oil, natural gas or groundwater resources, it needs to be repeatedly tripped, the drill rod is heavy, and only manpower cannot achieve quick installation and disassembly, so the drill rod needs to be clamped and fixed by the clamping device on the drilling machine, and then the installation mechanism on the drilling machine is used to install and disassemble the drill rod, so that the installation and disassembly of the drill rod can be easily realized.

[0003] In the prior art, a vertical shaft drilling machine drill rod grabbing manipulator is disclosed in Chinese Utility Model Patent No. CN222328198U, which comprises a telescopic arm extending in the horizontal direction and a clamping jaw that can be opened and closed. The telescopic arm comprises a first arm and a second arm that can be axially telescoped and inserted into the first arm. The clamping jaw comprises a first clamping jaw body fixed to the end of the first arm and a second clamping jaw body rotatably connected to the first clamping jaw body and / or the first arm. The side walls of the first and second clamping jaw bodies each have an arc-shaped slot. The rotational axis of the second clamping jaw body is perpendicular to the horizontal plane. The clamping jaw is opened and closed by rotating the second clamping jaw body relative to the first clamping jaw body. When the clamping jaw is opened, the first and second arc-shaped slots are open to allow the drill rod to enter. When the clamping jaw is closed, the arc-shaped slots are connected in series to form a clamping hole that clamps the drill rod. A first elastic element is provided on the inner wall of the first arc-shaped slot. When the clamping jaw is closed, the first elastic element is squeezed between the drill rod and the first arc-shaped slot. When the clamping jaw is opened, the first elastic element can rebound to allow the drill rod to easily disengage. The opening and closing of the two clamping jaws of the vertical shaft drilling machine drill rod grabbing manipulator presented by the above-mentioned utility model are controlled by a hydraulic cylinder branch line drive. However, only one of the two clamping jaws can rotate, the opening degree is small, it is not convenient to directly grab the drill rod, and the clamping is not tight enough due to the linear drive of the hydraulic cylinder. UTILITY MODEL CONTENTS

[0004] The utility model aims to provide a drill rod clamping device to solve the problems raised in the background art.

[0005] A drill rod clamping device, characterized in that it comprises a bracket, the end of the bracket is fixedly connected with a gripper, the gripper comprises an assembly frame, two clamping jaws are rotatably connected to the assembly frame, the two clamping jaws are symmetrically distributed, an operating cavity is formed in the adjacent side of the clamping jaw, a telescopic cylinder is fixedly connected to the bracket, and the telescopic cylinder can simultaneously extend into and press the operating cavities of the two clamping jaws when it extends.

[0006] Preferably, the two ends of the bracket are fixedly connected with grippers, and the telescopic cylinder is a double-headed telescopic cylinder that can simultaneously drive the clamping jaws on the two grippers at the two ends.

[0007] Preferably, the assembling frame is U-shaped, comprising a connecting plate in the middle and support plates on both sides, two symmetric through holes are opened on both sides of the end of the support plate away from the assembling connecting piece, rotating shafts are connected in the through holes, the clamping jaws are sleeved on the rotating shafts, and a through hole is further arranged in the middle of the support plate, which is correspondingly arranged with the telescopic cylinder.

[0008] Preferably, a rotating hole is opened in the middle of the clamping jaw, an arc-shaped gripping part is arranged at the front end of the clamping jaw, the running cavity is opened at the rear end of the clamping jaw, the running cavity is a semi-conical cavity, the gripping part and the running cavity are respectively arranged on both sides of the rotating hole, and the gripping part and the running cavity are both arranged on the adjacent side of the other clamping jaw which is symmetrically distributed.

[0009] Preferably, the clamping jaw and the assembling frame are further connected through a spring, the elastic force of the spring makes the gripping parts of the two clamping jaws on the same assembling frame move away from each other, and simultaneously makes the running cavities of the two adjacent clamping jaws move close to each other.

[0010] Preferably, the end of the telescopic rod in the telescopic cylinder is conical and corresponds to the running cavity.

[0011] Compared with the prior art, the advantages of this invention are as follows: In this device, the two grippers of the same assembly frame are open under the action of springs. The grippers use a rotating hole as a lever and can rotate around a pivot in the rotating hole. The spring keeps the grippers open. When the telescopic cylinder extends, the ends of the telescopic rod can simultaneously enter the operating chambers of the two grippers. The tapered telescopic rod can extend along the operating chamber into the gap between the two grippers, thus separating the tail ends of the two grippers. Simultaneously, under the action of the levers, the head ends of the two grippers, i.e., the gripping parts, can move closer together to form a grasping shape, thereby enabling the telescopic cylinder to control the gripper. When the telescopic cylinder retracts the telescopic rod, the two grippers in the gripper will return to their open position under the action of springs. By controlling the extension and retraction of the telescopic cylinder, the gripper's grasping action can be controlled. Both ends of the telescopic cylinder are equipped with… Equipped with grippers, the two grippers can be controlled by a double-headed telescopic cylinder for a more secure grip. The telescopic cylinder's operating direction is perpendicular to the gripper's direction. The gripping force is transmitted through the conical telescopic rod pressing against the two grippers, resulting in a tighter grip and improved handling. Both grippers are movable, allowing for a wider opening angle and easier drill rod retrieval. When the telescopic cylinder extends, it simultaneously enters and presses against the operating chambers of both grippers. The telescopic cylinder applies vertical force to drive the two grippers to clamp. In its natural open state, the grippers allow the drill rod to enter between them. The extension of the telescopic cylinder further drives the two grippers to clamp, thus retrieving the drill rod. The bidirectional piston rod simultaneously drives both grippers for a more secure grip on the drill rod. The simultaneous movement of the two grippers and their wider opening angle facilitate drill rod retrieval. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model;

[0013] Figure 2 This is a schematic diagram of the specific structure of the gripper in one embodiment of the present invention;

[0014] Figure 3 This is a schematic diagram illustrating the cooperation between the gripper and the telescopic rod in one embodiment of the present invention;

[0015] Figure 4 This is a schematic diagram of the specific structure of the gripper in one embodiment of the present invention.

[0016] In the diagram: 1. Bracket; 2. Telescopic cylinder; 21. Telescopic rod; 3. Gripper; 31. Assembly frame; 311. Connecting plate; 312. Support plate; 313. Through hole; 32. Gripper; 321. Grip part; 322. Rotating hole; 323. Running cavity; 33. Spring; 4. Drill rod. Detailed Implementation

[0017] The following will describe specific embodiments and appendices.Figures 1-4 The technical solutions in the embodiments of the utility model are clearly and completely described.

[0018] A drill rod clamping device, including a support 1, support 1 is used to play the role of supporting the whole, support 1 is fixedly connected with a telescopic cylinder 2 along the same direction of support 1, telescopic cylinder 2 adopts double-end telescopic cylinder, can simultaneously telescopic to both ends, increase control diversification, both ends of support 1 are fixedly connected with gripper 3, the telescopic of telescopic cylinder 2 makes the telescopic rod 21 of both ends can be inserted into the gripper 3 of both ends, drives two grippers 3 to realize gripping drill rod 4 together, gripping is more firm.

[0019] Gripper 3 includes an assembly frame 31, jaw 32 and spring 33, assembly frame 31 is as a whole presents U shape, assembly frame 31 includes the connecting plate 311 in the middle and the two support plates 312 on both sides, three constitute U shape, connecting plate 311 is fixedly connected with support 1 by bolt, two through holes that are symmetrical with each other are set up on both sides of the end away from connecting plate 311 of support plate 312, two through holes are all rotatably connected with the shaft, the shaft is prior art, jaw 32 is connected with the shaft on the shaft, jaw 32 can rotate around the shaft, simultaneously rotating two jaws 32 can make two jaws 32 present different postures of clamping or releasing, a through hole 313 is set up in the middle of support plate 312, through hole 313 is coaxially corresponding with telescopic cylinder 2, the end of telescopic rod 21 in telescopic cylinder 2 needs to enter through hole 313 when telescopic rod 21 is stretched out, further contacts jaw 32, so that two jaws 32 can carry out clamping operation.

[0020] The middle part of the clamping jaw 32 is provided with a rotating hole 322, the clamping jaw 32 is sleeved on the rotating shaft through the rotating hole 322 and can rotate around the rotating shaft, the front end of the clamping jaw 32 is provided with an arc-shaped gripping part 321, the arc of the gripping part 321 corresponds to the size of the common drill rod 4, so that the arc surface of the gripping part 321 can be in complete contact with the side surface of the drill rod 4 when the gripping part 321 contacts the drill rod 4, the rear end of the clamping jaw 32 is provided with the operating cavity 323, the operating cavity 323 is a semi-conical cavity, the rear ends of the two clamping jaws 32 are close to each other, and the two operating cavities 323 will be combined into an approximately conical space, when the rear ends of the two clamping jaws 32 are close to each other, the front ends of the two clamping jaws 32 are in an open state, at this time, the two gripping parts 321 are farthest away from each other and can accommodate a drill rod 4 into the gripping part 321, the gripping part 321 and the operating cavity 323 are located on the two sides of the rotating hole 322, so that the clamping jaw 32 can form a lever structure with the rotating shaft as the fulcrum, and the movement of one end of the clamping jaw 32 can make the other end move, when the two clamping jaws 32 are installed on the support plate 312, the gripping parts 321 of the two clamping jaws 32 are close to each other and are used to lock the drill rod 4, the operating cavities 323 of the two clamping jaws 32 are also close to each other, when the telescopic cylinder 2 is telescoped, the telescopic rod 21 will pass through the through hole 313 on one side of the support rod and then move along the operating cavities 323 of the two clamping jaws 32, the telescopic rod 21 will make the rear ends of the two clamping jaws 32 separate from each other, so that the front ends of the two clamping jaws 32 are close to each other, and the clamping action is realized, and the drill rod 4 is clamped.

[0021] The two telescopic rods 21 at the two ends of the telescopic cylinder 2 are conical and correspond to the operating cavities 323, the two have the same taper, which can increase the contact area of the telescopic rod 21 and the operating cavity 323 and disperse the stress to prevent the operating cavity 323 from being deformed by stress.

[0022] After the clamping jaw 32 is driven by the telescopic rod 21 to enter the clamping state, it cannot restore to the open state in which the two gripping parts 321 are far away from each other, so a spring 33 is arranged between the clamping jaw 32 and the assembly frame 31, the spring 33 is arranged between the support plate 312 and the clamping jaw 32, the spring 33 is in a compressed state and always maintains a pushing force on the rear end of the clamping jaw 32, so that the rear ends of the two clamping jaws 32 are close to each other, thereby the two clamping jaws 32 can maintain the open state when they are not affected by the telescopic rod 21, the telescopic rod 21 is controlled to be telescoped to control the two clamping jaws 32 to clamp, and the two clamping jaws 32 automatically restore to the open state after the telescopic rod 21 is retracted, thereby the repeated clamping function of the gripper 3 is realized.

[0023] Similarly, in one embodiment, the spring described above can also be a tension spring, and the two ends of the spring are connected to the clamping jaw and the support plate respectively, but the connection positions are different from those marked in the drawings, but the spring will be in an elongated state, and the spring will make the clamping jaws tend to approach each other to a clamping state under the action of tension, and the automatic clamping effect can also be achieved.

[0024] Both clamping jaws 32 can be movable, and the opening angle is larger, and it is more convenient to pick up the drill rod.

[0025] In addition to the technical features described in the specification, they are known to those skilled in the art.

[0026] In the utility model, "upper", "lower", "left", "right", "front", "rear" are relative positions adopted for the convenience of describing the positional relationship, and therefore cannot be understood as absolute positions as a limitation on the protection scope.

[0027] The above content is only an example and description of the structure of the utility model, and those skilled in the art can make various modifications or supplements or replace them with similar ways, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, and they should belong to the protection scope of the utility model.

Claims

1. A drill rod gripping device characterized by, The support is fixedly connected with a handle at its end, the handle comprises an assembling frame, two clamping jaws are rotatably connected to the assembling frame, the two clamping jaws are symmetrically distributed, an operation cavity is formed in the adjacent side of the clamping jaw, a telescopic cylinder is fixedly connected to the support, and the telescopic cylinder can simultaneously extend into and press the operation cavities of the two clamping jaws.

2. A pipe gripping device according to claim 1, wherein The support is fixedly connected with a handle at its end, the handle comprises an assembling frame, two clamping jaws are rotatably connected to the assembling frame, the two clamping jaws are symmetrically distributed, an operation cavity is formed in the adjacent side of the clamping jaw, a telescopic cylinder is fixedly connected to the support, and the telescopic cylinder can simultaneously extend into and press the operation cavities of the two clamping jaws.

3. A pipe gripping device according to claim 1 or 2, characterised in that, The assembling frame is U-shaped, the assembling frame comprises a connecting plate in the middle and support plates on both sides, two symmetric through holes are formed in the two sides of the end of the support plate away from the assembling connecting piece, a rotating shaft is rotatably connected to the through hole, the clamping jaw is sleeved on the rotating shaft, a through hole is further arranged in the middle of the support plate, and the through hole is correspondingly formed in the telescopic cylinder.

4. A pipe gripping device according to claim 3, wherein A rotating hole is formed in the middle of the clamping jaw, an arc-shaped gripping part is arranged at the front end of the clamping jaw, the operation cavity is formed in the rear end of the clamping jaw, the operation cavity is a semi-conical cavity, the gripping part and the operation cavity are respectively arranged on the two sides of the rotating hole, and the gripping part and the operation cavity are arranged on the adjacent side of the other clamping jaw.

5. A pipe gripping device according to claim 4, wherein, The clamping jaw and the assembling frame are further connected through a spring, the elastic force of the spring makes the gripping parts of the two clamping jaws on the same assembling frame move away from each other, and simultaneously makes the operation cavities of the two adjacent clamping jaws move close to each other.

6. A pipe gripping device according to claim 5, wherein, The end of the telescopic rod in the telescopic cylinder is conical and corresponds to the operation cavity.

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