CN110905425B

CN110905425B - End clamping device of drill rod

Info

Publication number: CN110905425B
Application number: CN201910994478.3A
Authority: CN
Inventors: 校文超; 杨义勇; 岳�文; 康嘉杰
Original assignee: China University of Geosciences Beijing
Current assignee: Zhengzhou Research Institute of China University of Geosciences (Beijing); China University of Geosciences Beijing
Priority date: 2019-10-18
Filing date: 2019-10-18
Publication date: 2020-11-17
Anticipated expiration: 2039-10-18
Also published as: CN110905425A

Abstract

The invention provides an end clamping device of a drill rod, which comprises telescopic arms which are arranged in pairs to adjust the clamping distance, wherein each telescopic arm comprises a telescopic rod, a spring, a guide disc, a fixed disc and an end cover, one end of the fixed disc is connected with the guide disc, the other end of the fixed disc is connected with the end cover, the spring is arranged in the fixed disc, the telescopic rods penetrate through the fixed disc and extend into the guide disc, and the telescopic rods are connected with the springs and can linearly reciprocate along the fixed disc to adjust the distance in a telescopic manner. The end part clamping device can avoid scratching the rod body of the drill rod in a radial clamping mode, and is simultaneously suitable for clamping drill rods with different specifications and sizes.

Description

End clamping device of drill rod

Technical Field

The invention relates to a clamping device, in particular to an end clamping device of a drill rod.

Background

The clamping of the drill rod is a key step of the handling and the carrying of the drill rod. The common drill rod clamping mode is mainly radial clamping, and the mode easily causes scratches on the surface of a drill rod body. Complementary to the radial clamping mode is the end clamping mode, and the end clamping mode mostly adopts a clamping end to extend into the hollow drill rod so as to lift the drill rod for carrying, however, the adaptability of the mode to different specifications of drill rods is relatively poor. Therefore, the end part clamping device suitable for the drill rods with different specifications is designed, so that the drill rods with different specifications are clamped, and the practical significance is very important.

Disclosure of Invention

In view of the above, the present invention is directed to provide an end clamping device for drill rods, which is suitable for clamping and transporting drill rods with different lengths and different radial specifications.

In order to achieve the purpose, the technical scheme of the invention is realized as follows:

the utility model provides an end clamping device of drilling rod, includes the flexible arm that sets up in pairs with adjustment clamping distance, flexible arm include telescopic link, spring, positioning disk, fixed disk and end cover, fixed disk one end and positioning disk fixed connection, the other end and end cover fixed connection, the spring set up in inside the fixed disk, the telescopic link is worn to establish on the fixed disk and extend to in the positioning disk, telescopic link and spring coupling, and can follow fixed disk straight reciprocating motion is with flexible adjustment distance.

Furthermore, one end of the fixed disc is provided with a spring part, and the spring part is internally provided with the spring.

Further, the fixed disk other end be provided with flexible pole portion, flexible pole portion with spring portion intercommunication, flexible pole portion is worn to be equipped with the telescopic link, the telescopic link can be followed flexible pole portion straight reciprocating motion.

Furthermore, the end cover is connected with one end of the fixed disc, which is provided with the spring part, and can be abutted against the spring.

Furthermore, the telescopic rod is provided with a plurality of telescopic rods.

Furthermore, the springs correspond to the telescopic rods in number one by one.

Furthermore, the number of the telescopic rods corresponds to that of the telescopic rods one to one, and the number of the spring parts corresponds to that of the telescopic rods one to one.

Furthermore, the guide disc is hollow and used for accommodating the telescopic rod and the drill rod.

Furthermore, the telescopic arm is controlled by hydraulic pressure or air pressure.

The end clamping device of the drill rod has the following beneficial effects:

1. the device is installed in pairs, and the distance between two clamping devices is controlled by a hydraulic telescopic arm so as to clamp drill rods with different length specifications;

2. the guide disc is hollow, and a plurality of telescopic arms are arranged in the guide disc, so that the clamping of drill rods with different radial specifications can be automatically adjusted;

3. the end part clamping device can avoid the scratching of the rod body of the drill rod by a middle clamping mode.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of an end clamp assembly according to an embodiment of the present invention;

FIG. 2 is an enlarged view of an end clamp A according to an embodiment of the present invention;

FIG. 3 is a partial view of a fixing plate according to an embodiment of the present invention;

FIG. 4 is a static schematic view of a clamping device according to an embodiment of the present invention;

FIG. 5 is a view of the change of the inner telescopic rod of the clamping device under the action of external force according to the embodiment of the invention;

FIG. 6 is an axial view of a clamping device according to an embodiment of the present invention in a rest state;

FIG. 7 is an axial view of a clamping device according to an embodiment of the present invention in a compressed state;

fig. 8 is a partial schematic view of a fixed disk and a guide disk structure according to the second embodiment.

Description of reference numerals:

1. an end cap; 2. a spring; 3. fixing the disc; 31. a spring portion; 32. a telescopic rod part; 4. a guide plate; 5. a telescopic rod; 6. a drill stem; 7. a telescopic arm.

Detailed Description

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

The descriptions in this document referring to "first", "second", "upper", "lower", etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," "upper," "lower," may explicitly or implicitly include at least one of the feature. In addition, the technical solutions in the embodiments may be combined with each other, but it is necessary that a person skilled in the art can realize the combination, and the technical solutions in the embodiments are within the protection scope of the present invention.

The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

As shown in fig. 1, 2 and 3, an embodiment of an end clamping device for a drill rod includes a telescopic arm 7 which is arranged in pairs to adjust a clamping distance, the telescopic arm 7 includes a telescopic rod 5, a spring 2, a guide disc 4, a fixed disc 3 and an end cover 1, the fixed disc 3 is cylindrical, one end of the fixed disc is fixedly connected with the guide disc 4, the other end of the fixed disc is fixedly connected with the end cover 1, one end of the fixed disc 3 connected with the end cover 1 is provided with a spring portion 31, the spring portion 31 is a cylindrical hole, the spring 2 is arranged in the spring portion, one end of the fixed disc 3 connected with the guide disc 4 is provided with a telescopic rod portion 32, the telescopic rod portion 32 is a cylindrical hole and is communicated with the spring portion 31, the telescopic rod 5 is penetrated in the telescopic rod portion, the telescopic rod 5 can linearly reciprocate along the telescopic rod portion 32, one end of the telescopic rod 5 extends into the, the spring part 31 and the telescopic rod part 32 jointly penetrate through the left end and the right end of the fixed disc 3; the guide disc 4 is cylindrical, and the interior of the guide disc is hollow; the end cap 1 is cylindrical and can abut against the spring 2.

Specifically, the telescopic rod 5 be provided with a plurality of, 2 quantity of spring with 5 quantity one-to-one of telescopic rod, spring portion 31 and the quantity of telescopic rod portion 32 with 5 quantity one-to-one of telescopic rod to the position one-to-one of spring portion 31 and telescopic rod portion 32.

When the clamping device does not clamp the drill rod 6 and is static, as shown in fig. 4, each telescopic rod 5 is in a static state, the lengths of the telescopic rods 5 extending out of the guide disc 4 are consistent, the springs 2 are in a relaxed state and are consistent, as shown in fig. 6, the cross sections of the telescopic rods 5 are densely distributed in the figure, the telescopic rods 5 are uniformly distributed in the telescopic arms 7, and the telescopic rods 5 are not stressed.

When the clamping device clamps the drill rod 6, as shown in fig. 5, the telescopic rod 5 in the clamping device, which is in contact with the drill rod 6, is subjected to an axial force and moves linearly along the telescopic rod part 32 to the spring part 31, so as to compress the spring 2, the spring 2 is abutted and deformed with the end cover 1, the length of the telescopic rod 5 extending out of the guide disc 4 in the clamping state is shortened, the length of the spring 2 is shortened, and as shown in figure 7, the dotted line in the figure is the section of the drill rod 6 to be lifted, the densely distributed circular ring shape in the figure is the section of the telescopic rod 5, the small rings (hatching marks) contacted with the dotted line rings are compressed to play a role of clamping the end surface of the drill rod 6, the small rings not contacted with the dotted line rings play a role of radially supporting the drill rod 6, meanwhile, as the drill rod 6 is hollow, part of the telescopic rod 5 can be positioned inside the drill rod 6 and does not interfere with the drill rod 6, so that the telescopic rod can be suitable for drill rods 6 with different radial specifications.

The device is installed in pairs, and the telescopic arms 7 are controlled by hydraulic pressure or pneumatic pressure to move relatively or reversely so as to clamp drill rods 6 with different lengths and specifications. During operation, the paired telescopic arms 7 are in an open state, after the drill rod 6 is placed in the drill rod, the paired telescopic arms 7 move relatively along the axial direction of the drill rod 6, the inner telescopic rod 5 contacts with the end face of the drill rod 6 and clamps the drill rod 6 gradually, and when the drill rod 6 is clamped, the telescopic rod 5 in the clamping device, which is in contact with the drill rod 6, continues to move axially to compress the spring 2; the telescopic rod 5 which is not contacted with the drill rod 6 is kept in the original position to play a role in radially fixing the drill rod 6. When the drill rod 6 is dismounted, the pair of telescopic arms 7 move reversely, and after the drill rod 6 is dismounted, the inner telescopic rod 5 is reset under the action of the spring 2. The clamping device is internally composed of a plurality of telescopic rods 5, and can automatically adjust the clamping of drill rods 6 with different radial specifications. The end part clamping device can avoid scratching the rod body of the drill rod 6 in a middle clamping mode, and is simultaneously suitable for clamping the drill rods 6 with different specifications and sizes.

In other embodiments, the end cover 1, the fixed disk 3 and the guide disk 4 are not limited to a cylindrical structure or a rectangular structure, and the telescopic rods 5 arranged on the fixed disk 3 are uniformly distributed or non-uniformly distributed, and are arranged according to the requirement that the end of the drill rod 6 can be clamped and does not interfere with the drill rod 6.

Embodiment two, end cover 1 with fixed disk 3 merges structure as an organic whole, only needs fixed disk 3 and deflector 4 promptly, and the one end that fixed disk 3 and deflector 4 are connected is provided with spring portion 31, and spring portion 31 is cylindrical hole, and not the through-hole, and the one end of being connected with fixed disk 3 on the deflector 4 is provided with telescopic rod portion 32, and telescopic rod portion 32 sets up to cylindrical through-hole, and the hollow groove has been seted up to the deflector 4 other end for hold the telescopic link 5 of wearing out telescopic rod portion 32, and drilling rod 6, other settings are with embodiment one.

Although the invention has been described in detail above with reference to a general description and specific examples, it will be apparent to one skilled in the art that modifications or improvements may be made thereto based on the invention. Accordingly, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. The end clamping device of the drill rod is characterized by comprising telescopic arms (7) which are arranged in pairs for adjusting the clamping distance, wherein each telescopic arm comprises a telescopic rod (5), a spring (2), a guide disc (4), a fixed disc (3) and an end cover (1), one end of each fixed disc (3) is fixedly connected with the guide disc (4), the other end of each fixed disc is fixedly connected with the end cover (1), the springs (2) are arranged inside the fixed discs (3), the telescopic rods (5) penetrate through the fixed discs (3) and extend into the guide discs (4), the telescopic rods (5) are connected with the springs (2) and can linearly reciprocate along the fixed discs (3) for adjusting the distance in a telescopic way, the telescopic rods (5) are provided with a plurality of parts, the telescopic rods (5) are uniformly distributed in the telescopic arms (7) and do not clamp the drill rod (6), each telescopic rod (5) is in a static state, when the drill rod (6) is clamped, the telescopic rods (5) in the clamping devices, which are in contact with the drill rod (6), are subjected to axial force, so that the springs (2) are compressed to play a role in clamping the end face of the drill rod (6), and the telescopic rods (5) which are not in contact with the drill rod (6) are kept in situ to play a role in radially fixing the drill rod (6).

2. End clamp for drill rods according to claim 1, characterized in that the holding plate (3) is provided with a spring section (31) at one end, and the spring section (31) is provided with the spring (2).

3. The end clamping device of the drill rod as claimed in claim 2, wherein a telescopic rod part (32) is arranged at one end of the fixed plate (3), the telescopic rod part (32) is communicated with the spring part (31), the telescopic rod part (5) penetrates through the telescopic rod part (32), and the telescopic rod (5) can linearly reciprocate along the telescopic rod part (32).

4. End clamp for a drill rod according to claim 3, characterised in that the end cap (1) is connected to the end of the holding pan (3) provided with the spring portion (31) and can be brought into abutment with the spring (2).

5. The end clamp of the drill rod as claimed in claim 3, characterized in that the number of the springs (2) corresponds to the number of the telescopic rods (5).

6. The end clamp device of the drill rod as claimed in claim 3, wherein the number of the telescopic rods (32) is one-to-one corresponding to the number of the telescopic rods (5), and the number of the spring parts (31) is one-to-one corresponding to the number of the telescopic rods (32).

7. End clamp for drill rods according to claim 1, characterized in that the guide disc (4) is hollow inside.

8. End clamp for drill rods according to claim 1, characterized in that the telescopic arm (7) is hydraulically or pneumatically controlled.