CN220036618U - Drilling machine clamp holder assembly - Google Patents

Abstract

The utility model discloses a drilling machine gripper assembly, which comprises a gripper seat; the slip seat is provided with a perforation, clamping through holes are distributed on the inner wall of the perforation in an annular array manner, and the slip seat penetrates through the holder seat; the three slips slide on the inner wall of the slip seat, the slip sliding direction forms an included angle with the axis of the perforation, and the slips comprise a guide part and a clamping part integrally connected with the guide part; the elastic piece is used for driving the slips to be close to the axis of the perforation through the slip seat so as to clamp the drill rod. In this rig holder assembly, the slips adopts guiding part and clamping part integrated into one piece's structure, guarantees the stable sliding fit between slips and the holder seat, has reduced the slips atress back guiding part and clamping part and breaks away from and the slips deformation damage's condition to realize the firm centre gripping to the drilling rod, extension life, reduce and change the frequency, prevent that the drilling rod from falling back and bringing potential safety hazard and economic loss for the user.

Description

Drilling machine clamp holder assembly

Technical Field

The utility model relates to the technical field of drilling, in particular to a drilling machine clamp holder assembly.

Background

In drilling construction, it is necessary to frequently use drill rod holders. The quality of the drill rod clamp holder directly influences the production and construction efficiency. The hydraulic clamp holder of the engineering driller in the prior art is mainly clamped by adopting a telescopic oil cylinder, the slips are connected with a clamping oil cylinder lever through a mechanical structure, and the connected slips are driven to feed by feeding oil to a rodless cavity of the hydraulic cylinder, so that a drill rod is clamped, and the follow-up work is facilitated.

However, the gripper has the following two problems during the construction operation: on the one hand, after the clamp holder clamps the drill rod for a long time, hydraulic oil in the oil cylinder leaks along with the increase of clamping time, and finally the hydraulic oil leads to a sliding cylinder, so that the drill rod is loose and easy to drop; on the other hand, after the oil cylinder breaks down, the clamp holder can also be caused to loosen the drill rod, and the drill rod falls off. Both conditions can cause the early drilling result to be destroyed once, so that the drilling efficiency is reduced, the economic loss is brought to users, and potential safety hazards are also caused.

Based on the above factors, the chinese patent publication No. CN218439264U discloses a gripper assembly for a drilling machine, and after the gripper assembly fails, the elastic force of the elastic member automatically drives the slip seat to move axially along the perforation, so that the slip is made to move towards the direction along the radial direction of the perforation and close to the axis of the perforation to clamp the drill rod, thereby preventing the potential safety hazard and economic loss caused by the falling of the drill rod to the user. Among the above-mentioned holder assembly, slips and wear pad adopt split type connected mode, and when slips slid on the holder seat, wear pad and holder seat contact, and both produce sliding friction, because drilling rod weight is great, is usually more than 6 tons, still need let in more flushing coolant (1 to 2 tons) simultaneously in the holder operation for slips need apply great clamping force to the drilling rod, lead to wear pad wearing and tearing aggravation easily, arouse the deformation, shorten life, need carry out frequent change to wear pad, even arouse the separation between slips and the wear pad, and then lead to the drilling rod to break away from.

Accordingly, there is a need for an improvement in the construction of prior art holder assemblies for drilling rigs.

Disclosure of Invention

The utility model aims to overcome the defects in the prior art and provide the drilling machine clamp holder assembly which reduces deformation, prolongs the service life, ensures stable clamping effect and slip risk.

In order to achieve the technical effects, the technical scheme of the utility model is as follows: a drill holder assembly, comprising:

the clamp holder seat is a cylindrical clamp holder seat;

the slip seat is provided with a perforation for the drill rod to pass through, clamping through holes are distributed on the inner wall of the perforation in an annular array manner, and the slip seat penetrates through the holder seat along the axial direction of the perforation;

the slip annular arrays are distributed on the inner side of the slip seat and slide on the inner wall of the slip seat, an included angle exists between the sliding direction of the slips and the axis of the through hole, and the slips comprise a guide part sliding on the slip seat and a clamping part integrally connected with the guide part and extending into the slip seat through the clamping through hole and in limit fit with the clamping through hole;

the device comprises a holder seat, a slip seat, a translation mechanism and an elastic piece, wherein the translation mechanism and the elastic piece are both arranged between the holder seat and the slip seat, the translation mechanism is used for driving the slip seat to move along the perforated axial direction, and the elastic piece is used for driving the slip to be close to the perforated axial lead through the slip seat so as to clamp a drill rod.

Preferably, in order to ensure the structural strength of the slips, the drill rod is prevented from falling off due to fracture, deformation and damage, and the slips are stainless steel slips.

Preferably, in order to increase the structural strength and the wear resistance of the guide part, the service cycle of the slips is prolonged, frequent replacement of the slips is avoided, and the thickness of the guide part is more than 10mm.

Preferably, in order to ensure a stable clamping of the drill rod, and at the same time reduce the acting force born by the slips, the service life is prolonged, and the slips have at least four.

Preferably, in order to clamp the drill rod, the drill rod is uniformly stressed so as to ensure that the stress of each slip is uniform, and the slips are distributed on the clamp holder seat in an equidistant annular array.

Preferably, for convenient assembly, the slip seat comprises a slip upper seat and a slip lower seat which are connected in a detachable way and are coaxial, and the clamping through hole is formed by encircling the slip upper seat and the slip lower seat.

Preferably, in order to increase the roughness of the adjacent surface of the slip and the axis of the perforation, enough friction force is ensured between the slip and the drill rod after the slip is abutted against the drill rod so as to strengthen the clamping and locking effect on the drill rod, one surface of the clamping part, which is opposite to the guiding part, is arranged on the clamping raised line, and the clamping raised line extends along the axial direction parallel to the perforation.

Preferably, in order to enlarge the contact surface between the slips and the drill rod when the drill rod is clamped, the cross section of the surface of the clamping convex strip adjacent to the axis of the perforation is circular arc, and the opening of the cross section faces the axis of the perforation.

Preferably, in order to ensure the clamping effect on the drill rod by increasing the number of the clamping raised strips, the clamping raised strips are provided with at least two annular arrays distributed on the clamping portions, and one surface of the clamping raised strips on the same clamping portion adjacent to the axis of the perforation is located on the same circular cylindrical surface.

Preferably, in order to prevent dust from entering between the holder seat and the slip seat, two ends of the holder seat are respectively fixed with an upper dust cover ring and a lower dust cover ring, and the upper dust cover ring and the lower dust cover ring are both sleeved outside the slip seat and are in clearance fit with the slip seat.

In summary, compared with the prior art, the clamp holder assembly of the drilling machine has the advantages that the slips are integrally connected with the clamping part to form the structure, stable sliding fit between the slips and the clamp holder seat is ensured, the situations that the guiding part and the clamping part are separated after the slips are stressed and the slips are deformed and damaged are reduced, firm clamping of a drill rod is achieved, the service cycle is prolonged, the replacement frequency is reduced, and potential safety hazards and economic losses caused by falling of the drill rod to users are prevented.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a bottom view of FIG. 1;

FIG. 3 is a cross-sectional view taken along the direction A-A of FIG. 2;

FIG. 4 is an exploded view of FIG. 1;

FIG. 5 is a schematic illustration of the connection of the slip bowl, gripper bowl and slips of the present utility model;

FIG. 6 is an exploded view of FIG. 5;

FIG. 7 is a schematic view of the structure of the bearing assembly of the present utility model;

FIG. 8 is an exploded view of FIG. 7;

FIG. 9 is a schematic illustration of the construction of a slip bowl according to the present utility model;

FIG. 10 is a schematic cross-sectional view of a translation mechanism of the present utility model;

in the figure: 100. a holder seat; 200. slip seat; 201. perforating; 202. clamping the through hole; 300. a slip; 301. a guide part; 302. a clamping part; 400. a translation mechanism; 500. an elastic member; 600. a slip upper seat; 700. a slip lower seat; 800. clamping the convex strips; 900. a dust cover ring is arranged on the upper part; 110. a lower dust cover ring; 120. a first bolt; 130. a second bolt; 140. a third bolt; 150. a fourth bolt; 160. a bearing assembly; 161. a bearing box; 162. deep groove ball bearings; 163. a mounting base; 164. a wear-resistant sleeve; 165. and a baffle.

Detailed Description

The following describes the embodiments of the present utility model further with reference to the drawings and examples. The following examples are only for more clearly illustrating the technical aspects of the present utility model, and are not intended to limit the scope of the present utility model.

As shown in fig. 1-10, the drill holder assembly of the present utility model comprises:

the gripper seat 100, the gripper seat 100 is a cylindrical gripper seat 100;

the slip seat 200 is provided with a perforation 201 for the drill rod to pass through, clamping through holes 202 are distributed on the inner wall of the perforation 201 in an annular array, and the slip seat 200 penetrates through the holder seat 100 along the axial direction of the perforation 201;

the slip 300 comprises a guide part 301 sliding on the slip seat 200 and a clamping part 302 integrally connected with the guide part 301 and extending into the slip seat 200 through a clamping through hole 202 and in limit fit with the clamping through hole 202;

the translation mechanism 400 and the elastic piece 500 are arranged between the holder seat 100 and the slip seat 200, the translation mechanism 400 is used for driving the slip seat 200 to move along the axial direction of the through hole 201, and the elastic piece 500 is used for driving the slip 300 to be close to the axial lead of the through hole 201 through the slip seat 200 so as to clamp a drill rod.

When the drill rod is required to be clamped and fastened, after the drill rod passes through the through hole 201 in the slip seat 200, the translation mechanism 400 drives the slip seat 200 to move along the axial direction of the through hole 201, and as the clamping through hole 202 is in limit fit with the clamping part 302 of the slip 300, the clamping through hole 202 contacts with the clamping part 302 of the slip 300 in the moving process to drive the slip 300 to slide on the inner wall of the clamp seat 100, and as the sliding is carried out, the slip 300 leans against the axial lead of the through hole 201, and finally the slip 300 is abutted against the circumferential outer edge of the drill rod, so that the effect of clamping the drill rod is achieved.

When the translation mechanism 400 breaks down, the elastic piece 500 relies on self elastic deformation to generate elastic deformation acting force, and acts on the slip seat 200, so that the slip seat 200 generates a trend of relative axial displacement with the holder seat 100, the clamping through hole 202 on the slip seat 200 acts on the slip 300, and further the slip 300 generates a trend of moving close to the axis of the perforation 201, so that the slip 300 can be ensured to be kept to be abutted on a drill rod, the state of locking the drill rod is further achieved, and potential safety hazards and economic losses to users caused by the fact that the drill rod is separated from the slip 300 after the translation mechanism 400 fails are prevented.

In the drilling machine gripper assembly, as the slips 300 adopt the integral connecting structure of the clamping part 302 and the guiding part 301, wherein the guiding part 301 is used for being in sliding fit with the gripper seat 100 so as to ensure the stable moving direction of the slips 300, and the clamping part 302 is adjacent to the axis line of the through hole 201 so as to clamp a drill rod passing through the through hole 201, the clamping part 302 and the guiding part 301 are integrally connected, so that the structural strength of the slips 300 is ensured, the possibility that the guiding part 301 and the slips 300 are broken or the slips 300 are deformed and damaged due to overlarge acting force of the slips 300 when the slips 300 clamp the drill rod in the using process of the device is reduced, the structural strength of the slips 300 is enhanced, the service life of the slips 300 is prolonged, the frequency of replacing the slips 300 is reduced, the slips 300 can clamp the drill rod is ensured, and the hidden danger caused by dropping of the drill rod is avoided, and the economic loss is caused to users is reduced.

Further specifically, the holder block 100, slip bowl 200, and bore 201 are coaxial; the translation mechanism 400 is provided with two translation mechanisms which are respectively positioned at two sides of the slip seat 200, the translation mechanism 400 comprises a hydraulic cylinder, a cylinder barrel of the hydraulic cylinder is fixedly connected with the slip seat 200, and a piston rod is fixedly connected with the holder seat 100; as shown in fig. 10, the elastic members 500 are in one-to-one correspondence with the translation mechanism 400, and the elastic members 500 are disc springs and are disposed in the rodless cavity of the hydraulic cylinder.

After the structure is adopted, the relative displacement between the piston rod and the cylinder barrel of the hydraulic cylinder is controlled by adjusting the oil quantity in the hydraulic cylinder, so that the slip seat 200 moves relatively relative to the holder seat 100, the elastic piece 500 is designed as a disc spring, and the advantages of large disc spring load, short stroke, small required space, convenience in combined use, easiness in maintenance and replacement, high economic safety and the like are utilized, so that the translational mechanism 400 can be guaranteed to be fast corresponding when failure occurs, and the slip 300 can be firmly clamped by utilizing the clamping through hole 202 of the slip seat 200 to act on the slip 300 by acting on the slip seat 200, so that the drill rod is prevented from falling; the disc spring is arranged in the rodless cavity of the hydraulic cylinder, so that the normal use of the disc spring can be guaranteed, the damage and the interference of the external environment to the disc spring are avoided, and the interference of the expansion deformation of the disc spring to the piston rod part of the hydraulic cylinder can be prevented.

A further improvement is that the slips 300 are stainless steel slips 300, the guide 301 being greater than 10mm thick. Specifically, the gripper seat 100 is provided with sliding grooves corresponding to the slips 300 one by one, the guiding portions 301 are in sealing fit with the inner walls of the sliding grooves, the guiding portions 301 are of rectangular plate-shaped structures, the thickness of the guiding portions 301 is 10.15mm, the length of the clamping portions 302 is smaller than that of the guiding portions 301, the width of the clamping portions 302 is smaller than that of the guiding portions 301, and the guiding portions 301 and the clamping portions 302 are integrally connected to form the stainless steel slips 300.

By adopting the structure, the manufacturing material of the slips 300 is stainless steel, and the structural strength of the slips 300 is further ensured, so that the situations of deformation, damage and fracture after the slips 300 bear the reaction force of the clamping acting force are avoided, and the clamping effect on a drill rod is further ensured; by increasing the thickness of the guiding part 301, the structural strength of the guiding part 301 is ensured, the wear resistance of the guiding part is enhanced, the service life of the slip 300 is prolonged, and frequent replacement is avoided.

A further improvement is that the slips 300 have at least four. Specifically, the slips 300 are provided in a total of four equally spaced annular arrays distributed on the gripper seat 100. Compared with the structure adopting three slips 300 in the prior art, in the clamp assembly, the four slips 300 are abutted against the drill rod together, so that the locking force is applied, the number of the slips 300 is increased, meanwhile, the acting force born by a single slip 300 is reduced, deformation and damage caused by overlarge acting force born by the slips 300 are avoided, and therefore the service life of the slips 300 is further prolonged.

Further improved is that the slip bowl 200 comprises a slip upper bowl 600 and a slip lower bowl 700 which are connected in a detachable manner and are coaxial, and the clamping through hole 202 is formed by encircling the slip upper bowl 600 and the slip lower bowl 700. Specifically, as shown in fig. 5, 6 and 9, the upper slip bowl 600 and the lower slip bowl 700 are fixedly connected by a fourth bolt 150, the fourth bolt 150 is provided with a plurality of bolts and distributed in an annular array on the axis line of the through hole 201, and the fourth bolt 150 penetrates through the upper slip bowl 600 along the axis line of the through hole 201 to be connected with the lower slip bowl 700.

After the structure is adopted, the slip seat 200 is convenient to form, the clamping through holes 202 on the slip seat 200 are formed by encircling the slip upper seat 600 and the slip lower seat 700, the number of the clamping through holes 202 is four, the four clamping through holes are in one-to-one correspondence and are in limit fit with the four slips 300, namely, gaps exist between the circumferential inner wall of the clamping through holes 202 and the circumferential outer edge of the clamping part 302 of the slips 300, the assembly is convenient, and when the slip seat 200 moves, the slips 300 can be driven to slide along the sliding grooves of the holder seat 100, and the distance between the slips 300 and the axial lead of the through hole 201 is changed.

Further improved is that one surface of the clamping part 302 facing away from the guiding part 301 is arranged on the clamping raised line 800, the clamping raised line 800 extends along the axial direction parallel to the perforation 201, the cross section of one surface of the clamping raised line 800 adjacent to the axial lead of the perforation 201 is arc-shaped, the opening of the cross section faces the axial lead of the perforation 201, at least two clamping raised lines 800 are arranged, the annular arrays are distributed on the clamping part 302, and one surface of the clamping raised line 800 adjacent to the axial lead of the perforation 201 on the same clamping part 302 is positioned on the same circular cylindrical surface. Specifically, as shown in fig. 2 and fig. 6, two parallel clamping raised strips 800 are disposed on a surface of the clamping portion 302 opposite to the guiding portion 301, the cross section of the surface of the two clamping raised strips 800 opposite to the guiding portion 301 is in a concentric circular arc shape, and is identical to the outer diameter of the drill rod, after the design is adopted, the roughness of the clamping surface of the clamping portion 302 is increased, the number of the clamping raised strips 800 is increased, and the structural design of the surface of the clamping raised strips 800 opposite to the guiding portion 301 increases the clamping contact area between the clamping raised strips 800 and the drill rod when the drill rod is clamped, so that a firm clamping effect is ensured.

Further improved is that the two ends of the holder seat 100 are respectively fixed with an upper dust cover ring 900 and a lower dust cover ring 110, and the upper dust cover ring 900 and the lower dust cover ring 110 are sleeved outside the slip seat 200 and are in clearance fit with the slip seat 200. Specifically, as shown in fig. 4, the upper dust cap ring 900 is fixedly connected to the top of the holder seat 100 through the first bolt 120, the lower dust cap ring 110 is fixedly connected to the bottom of the holder seat 100 through the second bolt 130, and the circumferential inner wall of the upper dust cap ring 900 and the circumferential inner wall of the lower dust cap ring 110 are in clearance fit with the circumferential outer edge of the slip bowl 200, so that the possibility that external dust impurities enter between the holder seat 100 and the slip bowl 200 is reduced, and the normal and stable operation of the holder assembly is ensured.

The top of the slip upper seat 600 is fixedly connected with a bearing assembly 160, the specific structure of the bearing assembly 160 is as shown in fig. 7 and 8, the bearing assembly comprises a bearing box 161, a deep groove ball bearing 162, a mounting seat 163, a wear-resistant sleeve 164 and a baffle 165 which are connected with each other by a coaxial line, wherein the bearing box 161 is sleeved outside one end of the slip upper seat 600 far away from the slip lower seat 700, the deep groove ball bearing 162 is arranged on the inner side of the bearing box 161, the outer ring of the bearing box is fixedly connected with the circumferential inner wall of the bearing box 161, the inner side of the inner ring is fixedly connected with the mounting seat 163, one end of the mounting seat 163 far away from the slip lower seat 700 is provided with an annular outward flange, the outward flange is fixedly connected with the baffle 165 through a third bolt 140 distributed in an annular array, and the circumferential outer edge of the wear-resistant sleeve 164 is fixedly connected with the circumferential inner wall of the mounting seat 163 in a sealing manner. With the above structure, when the drill rod penetrates through the through hole 201, the deep groove ball bearing 162 is utilized to ensure stable rotation of the drill rod, and meanwhile, the wear-resistant sleeve 164 is in contact with the drill rod, so that the wear resistance of the clamp assembly is increased, and the wear of the slip seat 200 after the drill rod rotates inside the through hole 201 is reduced.

The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present utility model, and these modifications and variations should also be regarded as the scope of the utility model.

Claims (10)

1. A drill holder assembly, comprising:

a holder base (100), wherein the holder base (100) is a cylindrical holder base (100);

the slip seat (200) is provided with a perforation (201) for a drill rod to pass through, clamping through holes (202) are distributed on the inner wall of the perforation (201) in an annular array manner, and the slip seat (200) penetrates through the holder seat (100) along the axial direction of the perforation (201);

the three slips (300) are distributed on the inner side of the slip seat (200) in an annular array manner and slide on the inner wall of the slip seat (200), an included angle exists between the sliding direction of the slips (300) and the axial lead of the through hole (201), and the slips (300) comprise a guide part (301) sliding on the slip seat (200) and a clamping part (302) integrally connected with the guide part (301) and extending into the slip seat (200) through the clamping through hole (202) and in limit fit with the clamping through hole (202);

translation mechanism (400) and elastic component (500), translation mechanism (400) and elastic component (500) all set up in holder seat (100) with between slips seat (200), translation mechanism (400) are used for the drive slips seat (200) are followed the axial displacement of perforation (201), elastic component (500) are used for passing through slips seat (200) drive slips (300) are close to the axial lead of perforation (201) in order to press from both sides the tight drilling rod.

2. The drill holder assembly of claim 1 wherein: the slips (300) are stainless steel slips (300).

3. The drill holder assembly of claim 1 wherein: the thickness of the guide part (301) is greater than 10mm.

4. The drill holder assembly of claim 1 wherein: at least four slips (300) are provided.

5. The drill holder assembly of claim 1 wherein: the slips (300) are distributed in equally spaced annular arrays on the gripper seat (100).

6. The drill holder assembly of claim 1 wherein: the slip seat (200) comprises a slip upper seat (600) and a slip lower seat (700) which are coaxial and detachably connected, and the clamping through hole (202) is formed by encircling the slip upper seat (600) and the slip lower seat (700).

7. The drill holder assembly of claim 1 wherein: the clamping portion (302) is arranged on the clamping raised line (800) on the surface opposite to the guiding portion (301), and the clamping raised line (800) extends along the axial direction parallel to the through hole (201).

8. The drill holder assembly of claim 7 wherein: the cross section of the surface of the clamping convex strip (800) adjacent to the axial lead of the perforation (201) is arc-shaped, and the opening of the cross section faces the axial lead of the perforation (201).

9. The drill holder assembly of claim 8 wherein: the clamping raised strips (800) are arranged at least two, the annular arrays are distributed on the clamping portions (302), and one surface, adjacent to the axis line of the through hole (201), of the clamping raised strip (800) on the same clamping portion (302) is located on the same circular cylindrical surface.

10. The drill holder assembly of claim 1 wherein: the two ends of the holder seat (100) are respectively fixed with an upper dustproof cover ring (900) and a lower dustproof cover ring (110), and the upper dustproof cover ring (900) and the lower dustproof cover ring (110) are respectively sleeved outside the slip seat (200) and are in clearance fit with the slip seat (200).