CN217841568U

CN217841568U - Slip structure suitable for clamping drill rods with various parameters

Info

Publication number: CN217841568U
Application number: CN202222417840.0U
Authority: CN
Inventors: 朱派东; 代政勇; 游海川; 赵敏
Original assignee: Cge Chongqing Exploration Machinery Co ltd
Current assignee: Cge Chongqing Exploration Machinery Co ltd
Priority date: 2022-09-13
Filing date: 2022-09-13
Publication date: 2022-11-18
Anticipated expiration: 2032-09-13

Abstract

The utility model discloses a be suitable for slips structure of multiple parameter drilling rod of centre gripping, including the slips body, slips body middle part is provided with the draw-in groove, the inner wall of draw-in groove connects gradually by the gradually crescent circular arc section of multistage diameter from inside to outside and constitutes, and the corresponding circular arc section of two upper and lower inner walls sets up according to the central line symmetry of draw-in groove respectively. Therefore, the slips of the utility model can respectively clamp the drill rods with corresponding diameters through the multi-section arc sections of the upper inner wall and the lower inner wall of the clamping groove, one slip can be suitable for the drill rods with various diameters, and the drilling efficiency of drilling construction is improved; and the contact area between the slips and the drill rod is obviously increased, and the stress state between the slips and the drill rod is improved and optimized.

Description

Slip structure suitable for clamping drill rods with various parameters

Technical Field

The utility model relates to a drilling equipment technical field, concretely relates to be suitable for slips structure of multiple parameter drilling rod of centre gripping.

Background

The drilling machine is mainly used for rock tunnels of railways, highways, underground spaces, water conservancy, hydropower stations and the like, and rock tunneling construction engineering which cannot adopt a blasting method is adopted.

In the drilling process of the drilling machine, the round drill rod is tightly held by the slips, and the slips rotate under the driving of the power device, so that the drill rod is driven to rotate, power is transmitted and the like. In the prior art, the diameter of a drill rod of a drilling machine is standard, and the standard sizes of the drill rod are mainly 50mm, 60mm, 73mm, 91mm, 108mm, 127mm and the like, and slips matched with the drill rod are mainly divided into two types, one type is semicircular or circular, the structure of the semicircular or circular slips matched with the drill rod is shown in figure 1, the second type is dovetail type, and the structure of the dovetail type slips matched with the drill rod is shown in figure 2; the diameter of the semicircular or circular slips is fixed, the semicircular or circular slips can only be matched with a drill rod with a corresponding fixed diameter, different slips need to be replaced when the semicircular or circular slips are used for clamping drill rods with different diameters, otherwise, the clamping surfaces are in line contact, the contact area is small, and the drill rods are damaged; although the dovetail groove type slips can clamp drill rods with various diameters, the slips are generally not required to be replaced within the size range, the dovetail groove type slips are always in line contact with the drill rods, the contact area is small, the pressure between the dovetail groove type slips and the drill rods is very large, and the drill rods are easy to damage.

Disclosure of Invention

To the not enough of above-mentioned prior art, the utility model aims to solve the technical problem that: how to provide a slip structure suitable for centre gripping multiple parameter drilling rod to make a slip just can be suitable for the drilling rod of multiple diameter, show the area of contact between increase slip and the drilling rod moreover, improve and optimized the stress between slip and the drilling rod.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the utility model provides a be suitable for slips structure of multiple parameter drilling rod of centre gripping, includes the slips body, its characterized in that, slips body middle part is provided with the draw-in groove, the inner wall of draw-in groove connects gradually by the gradually increasing circular arc section of multistage diameter from inside to outside and forms, and the corresponding circular arc section of two upper and lower inner walls sets up according to the central line symmetry of draw-in groove respectively. Thus, the slips of the utility model can respectively clamp the drill rods with corresponding diameters through the multi-section arc sections of the upper and lower inner walls of the clamping groove, one slip can be suitable for the drill rods with various diameters, and the drilling efficiency of drilling construction is improved; and the contact area between the slips and the drill rod is obviously increased, and the stress state between the slips and the drill rod is improved and optimized.

Furthermore, the clamping groove is V-shaped. The clamping groove with the V-shaped structure can be matched and clamped with the circular surface of the drill rod.

Furthermore, from the inner wall of draw-in groove, be first circular arc section, second circular arc section and third circular arc section in proper order. Therefore, the three-diameter arc sections are arranged, and one slip can be suitable for the drill rods with the three diameters corresponding to the drill rods with the three diameters.

Further, the diameter of the first arc section is D50mm; the diameter of the second arc section is D91mm; the diameter of the third arc section is D127mm. The circular arc sections with the three diameters respectively correspond to the drill rods with the three diameters D50, D91 and D127.

Further, the diameter of the first arc section is D50mm; the diameter of the second arc section is D60mm; the diameter of the third arc section is D91mm. The circular arc sections with the three diameters respectively correspond to the drill rods with the three diameters of D50, D60 and D91.

Further, the diameter of the first arc section is D50mm; the diameter of the second arc section is D60mm; the diameter of the third arc section is D73mm. The circular arc sections with the three diameters respectively correspond to the drill rods with the three diameters of D50, D60 and D73.

Further, the diameter of the first arc section is D73mm; the diameter of the second arc section is D91mm; the diameter of the third arc section is D108mm. The circular arc sections with the three diameters respectively correspond to the drill rods with the three diameters D60, D73 and D91.

Furthermore, an arc section which is connected with the inner wall of the clamping groove and has a diameter larger than that of the third arc section is arranged behind the third arc section. Therefore, the arc sections formed by the inner walls of the clamping grooves exceed three sections to form more arc sections which can be matched and clamped with drill rods with more diameters.

To sum up, the beneficial effects of the utility model reside in that: the slips of the utility model are respectively clamped with the drill rods with corresponding diameters through the multi-section arc sections of the upper inner wall and the lower inner wall of the clamping groove, one slip can be suitable for the drill rods with various diameters, and the drilling efficiency of drilling construction is improved; the contact area between the slip and the drill rod is obviously increased, and the stress state between the slip and the drill rod is improved and optimized; and the arc section exceeding three sections can be arranged, and the drill rod can be matched and clamped with drill rods with more diameters.

Drawings

FIG. 1 is a schematic view of a prior art slip and pipe combination having a semi-circular or circular shape;

FIG. 2 is a schematic view of a dovetail slip and a drill pipe fitting structure in the prior art;

fig. 3 is a front view of the slip structure suitable for holding drill rods with various parameters.

The slip comprises 1 slip, 2 drill rods, 11 slip bodies, 12 clamping grooves, 13 first arc sections, 14 second arc sections and 15 third arc sections.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings.

The utility model discloses a be suitable for slips structure of multiple parameter drilling rod of centre gripping, as shown in figure 3, including

slips body

1, 1 middle part of slips is provided with draw-in groove 12, during the use through draw-in groove 12 with treat the drilling rod surface cooperation of centre gripping, chucking drilling rod surface. The clamping grooves 12 are approximately V-shaped and are symmetrically arranged according to a central line.

The utility model discloses a draw-in groove 12, its inner wall from inside to outside, connect gradually the crescent circular arc section of multistage diameter and constitute, the corresponding circular arc section of two upper and lower inner walls sets up according to draw-in groove 12's central line symmetry respectively. From inside to outside of the inner wall of the clamping groove 12, the inner wall of the clamping groove is sequentially provided with a first arc section 13, a second arc section 14 and a third arc section 15, and an arc section with a diameter larger than that of the third arc section 15 can be arranged behind the third arc section. Each arc segment is symmetrically arranged according to the central line.

When in use, in order to better correspond to the diameter of a drill rod of a drilling machine and obtain better clamping effect, the radius R1 of the first arc section 13 of the utility model is R25mm, and the diameter is D50mm; a second arc segment 14 with a radius R2 of R45.5mm and a diameter D91mm; the third arc segment 15 has a radius R3 of R63.5mm and a diameter D127mm. Of course, according to the teaching of the present invention, it is also possible to provide arc segments with various diameters, such as the first arc segment 13, with a radius of R25mm and a diameter of D50mm; a second arc segment 14 with a radius of R30mm and a diameter of D60mm; a third arc segment 15 with a radius of R45.5mm and a diameter of D91mm; or a first circular arc section 13 with a radius of R25mm and a diameter of D50mm; a second arc segment 14 with a radius of R30mm and a diameter of D60mm; a third arc segment 15 with a radius of R36.5mm and a diameter of D73mm; or the first circular arc section 13, the radius of which is R36.5mm, the diameter of which is D73mm; a second circular arc section 14 with a radius of R45.5mm and a diameter of D91mm; a third arc segment 15 with a radius of R54mm and a diameter of D108mm; or a first arc segment 13 with a radius of R45.5mm and a diameter of D91mm; a second circular arc segment 14 with a radius of R54mm and a diameter of D108mm; and the third arc segment 15 has the radius of R63.5mm and the diameter of D127mm. According to the requirement, on the inner wall of the clamping groove 12, a connected arc section with a larger diameter can be arranged behind the third arc section 15 to form four or five arc sections which are connected to form the inner wall of the clamping groove 12.

Thus, the utility model discloses the V-arrangement draw-in groove 12 of slips, from inside to outside opening crescent, its inner wall has the circular arc section of the certain diameter of multistage to connect and forms, the circular arc section of the various diameters of its inner wall, it is the same with the cooperation (diameter) to correspond with the drilling rod diameter of this size, can coincide completely with the surface of drilling rod during the centre gripping, this circular arc section on the inner wall surrounds on the drilling rod surface, form surface contact, not the line contact among the prior art, show and increased area of contact between them, the stress between slips and the drilling rod has been improved and optimized. Moreover, the multiple sections of the arc sections on the same slip can be matched with the drill rods with the same diameter as the arc sections for clamping, so that the slip is suitable for drill rods with various diameters, the application range is expanded, the clamping times and time of the drill rods can be reduced in the drilling construction process, and the drilling efficiency is improved.

Finally, it is noted that the above embodiments illustrate rather than limit the invention, and that, while the invention has been described with reference to the preferred embodiments thereof, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The utility model provides a be suitable for slips structure of multiple parameter drilling rod of centre gripping, includes slips body (1), its characterized in that, slips body (1) middle part is provided with draw-in groove (12), the inner wall of draw-in groove (12) is connected gradually by the gradually crescent circular arc section of multistage diameter from inside to outside and is formed, and the corresponding circular arc section of upper and lower two inner walls sets up according to the central line symmetry of draw-in groove (12) respectively.

2. The slip construction adapted to hold pipe of various parameters according to claim 1, wherein the locking groove (12) is V-shaped.

3. The slip structure suitable for holding drill pipes with various parameters according to any one of claims 1 or 2, characterized in that the first circular arc section (13), the second circular arc section (14) and the third circular arc section (15) are arranged from the inner wall of the clamping groove (12) from inside to outside in sequence.

4. The slip construction adapted to grip a plurality of pipe parameters of claim 3, wherein the first circular arc segment (13) has a diameter of 50mm; the diameter of the second arc section (14) is 91mm; the diameter of the third circular arc section (15) is 127mm.

5. The slip construction adapted to grip multi-parameter drill pipe of claim 3, wherein the first circular arc section (13) is 50mm in diameter; the diameter of the second circular arc section (14) is 60mm; the diameter of the third circular arc section (15) is 91mm.

6. The slip construction adapted to grip a plurality of pipe parameters of claim 3, wherein the first circular arc segment (13) has a diameter of 50mm; the diameter of the second circular arc section (14) is 60mm; the diameter of the third circular arc section (15) is 73mm.

7. The slip construction adapted to grip a plurality of pipe parameters of claim 3, wherein the first circular arc segment (13) has a diameter of 73mm; the diameter of the second arc section (14) is 91mm; the diameter of the third circular arc section (15) is 108mm.

8. The slip structure suitable for clamping drill pipes with various parameters as claimed in claim 3, wherein a connected arc section with a diameter larger than that of the third arc section (15) is arranged behind the third arc section (15) on the inner wall of the clamping groove (12).