CN213898886U

CN213898886U - Hydraulic clamp holder for drilling machine

Info

Publication number: CN213898886U
Application number: CN202022748559.6U
Authority: CN
Inventors: 张世文; 陈豪
Original assignee: Wuxi Geological Drilling Equipment Co ltd
Current assignee: Wuxi Geological Drilling Equipment Co ltd
Priority date: 2020-11-24
Filing date: 2020-11-24
Publication date: 2021-08-06
Anticipated expiration: 2030-11-24

Abstract

The utility model provides a hydraulic clamp holder for drilling machine, including the holding frame, be equipped with at least two sets of hydraulic clamping parts that set up relatively on the holding frame, the structure of each group hydraulic clamping part includes hydraulic cylinder body, piston, spacing shrouding and the slip seat that is used for installing the slips, piston one end with hydraulic cylinder body inner wall sliding fit, the other end with slip seat elastic connection, spacing shrouding with the holding frame is solid and with the piston cooperation prevents its motion; the hydraulic cylinder body is connected with the slip seat through a connecting piece; the hydraulic cylinder body is provided with a first oil inlet and a second oil inlet, and hydraulic oil introduced from the first oil inlet acts on one end of the piston and is used for reversely pushing the hydraulic cylinder body to move; and hydraulic oil introduced from the second oil inlet acts on the slip seat and is used for positively pushing the slip to move. The utility model discloses a clamp force of the supplementary promotion slips of pressure oil prevents to lift the time drilling rod when off and skids, has improved reliability and security.

Description

Hydraulic clamp holder for drilling machine

Technical Field

The utility model belongs to the technical field of roofbolter holder technique and specifically relates to a hydraulic pressure holder for rig.

Background

The holder of roofbolter is a mechanism of centre gripping drilling rod, divide into movable vice and stationary tong, and the stationary tong presss from both sides tight drilling rod, and rotatory movable vice can rotate the drilling rod and realize unloading the drilling rod, and wherein the application of double slip stationary tong is comparatively extensive, and the double slip stationary tong presss from both sides the drilling rod tightly through two slips structures. However, most of the two slips of the existing holder are arranged in an up-and-down mode, a group of piston rods are adopted to push the lower slips to be opened firstly, the upper slips are opened again, the actions are asynchronous, the time is long, the stress of the drill rod is asynchronous, and the drill rod is easy to deform and damage. The centre of a circle position of slips and the central altitude point of design appear the difference in height easily from top to bottom, and according to the slips wearing and tearing volume of needs, this difference in height's maximum value is 1mm, and this when unscrewing the drilling rod, can produce certain damage to the drilling rod screw thread. In addition, long-term use leads to the slips wearing and tearing back, needs adjusting nut to offset the wearing and tearing volume, and the concrete performance in the use weakens for the clamping-force of holder to the drilling rod, and when unloading the drilling rod, the clamping force of stationary tong slips is different with the clamping force of rotatory moving vice (rotating chuck) to the drilling rod, leads to skidding between slips and the drilling rod, and the slips can produce serious annular wearing and tearing to the drilling rod.

SUMMERY OF THE UTILITY MODEL

The utility model provides a hydraulic pressure holder for rig sets up the supplementary centre gripping oil circuit of pressure oil to improve the clamp force of slips, prevent the protection drilling rod that skids.

The utility model adopts the technical scheme as follows:

the utility model provides a hydraulic pressure holder for rig, includes the holding frame, be equipped with hydraulic pressure clamping part on the holding frame, hydraulic pressure clamping part includes drive unit and the slips that is close to or keeps away from under the drive unit drive in step, the slips distributes around the drilling rod.

The number of the slips is more than or equal to two, and the slips are synchronously close to or far away from the drill pipe as the center.

The driving component comprises an oil pressure driving component or a combination of the oil pressure driving component and an elastic driving component.

The hydraulic clamping parts are arranged in two groups and are oppositely arranged, each group of hydraulic clamping parts structurally comprises a hydraulic cylinder body, a piston, a limiting sealing plate and a slip seat for mounting slips, one end of the piston is in sliding fit with the inner wall of the hydraulic cylinder body, and the limiting sealing plate is fixedly connected with the clamping frame and is matched with the piston to prevent the piston from moving; the hydraulic cylinder body is connected with the slip seat through a connecting piece; the hydraulic cylinder body is provided with a first oil inlet and a second oil inlet, and hydraulic oil introduced from the first oil inlet acts on one end of the piston and is used for reversely pushing the hydraulic cylinder body to move; and hydraulic oil introduced from the second oil inlet acts on the slip seat and is used for positively pushing the slip to move.

The hydraulic clamping part structurally further comprises an elastic connecting piece, and the other end of the piston is connected with the slip seat through the elastic connecting piece; one end of the elastic connecting piece is connected with the limiting sealing plate, and the other end of the elastic connecting piece is connected with the slip seat.

The piston head is arranged at one end of the piston, which is in sliding fit with the inner wall of the hydraulic cylinder body, a piston rod with a reduced inner diameter axially extends from the inner end surface of the piston, and a cavity communicated with the first oil inlet is formed between the outer end surface of the piston and the hydraulic cylinder body; a cavity is arranged in the piston rod.

The middle part of the piston rod is provided with an annular clamping groove, and the limiting sealing plate is provided with a limiting hole matched with the annular clamping groove.

An oil cavity is formed between the piston rod and the slip seat, a cavity inlet arranged in the piston rod is communicated with the second oil inlet, and an outlet is communicated with the oil cavity.

The clamping frame bilateral symmetry is equipped with the sleeve, the inside cavity that holds that forms of sleeve, sleeve one end with spacing shrouding fixed connection, the other end with the slip seat cup joints to set up the sealing member on the contact surface that cup joints.

The piston rod is sleeved with a guide ring, and one end of the guide ring is connected with the hydraulic cylinder body through a gland.

The connecting piece adopts a pull rod, one end of the pull rod is connected with the hydraulic cylinder body through a fastening piece, and the other end of the pull rod is in threaded connection with the slip seat.

The clamping frame is located chuck seats aligned with the slip axis are arranged at the two ends of the slip seat, and a dustproof sleeve is installed on one chuck seat through a bearing device.

The utility model has the advantages as follows:

the utility model discloses a first oil inlet lets in pressure oil and realizes that the slips is opened in step about, ensures that the drilling rod atress is balanced to prevent that it from taking place deformation and causing the damage, lets in the clamp force that pressure oil promoted the slips through the second oil inlet, and the drilling rod skids when preventing to lift off, has improved the reliability and the security of equipment. Specifically the utility model discloses still have following advantage:

the utility model discloses set up the specific hydraulic pressure oil circuit of second oil inlet cooperation, utilize the supplementary centre gripping of pressure oil, even do not adopt the elastic connection spare structure, the tight drilling rod of clamp is the same, when unscrewing the drilling rod, thread to difficult unloading is detained, the clamp force of slips can be along with unscrewing the rising of oil pressure and rise, prevent that rotary chuck from to the clamp force of drilling rod and holder slips poor too and lead to the drilling rod to skid to the clamp force of drilling rod, can satisfy the elasticity degree according to the thread knot simultaneously, the adjustment clamp force, the control slips is accomplished the pine of the cramp of unloading, the cramp of difficult unloading tightly, greatly reduced from this excessively presss from both sides the damage that causes the drilling rod.

In above-mentioned embodiment, the elastic connecting piece main function is when equipment power disappears suddenly, and the hydraulic oil of first oil inlet can't provide the clamp force promptly, is responsible for providing the clamp force by elastic connecting piece to prevent the accident of running the brill, thereby greatly promoted reliability and security.

The utility model discloses the wearing and tearing volume of accessible hydraulic cylinder body automatic compensation slips need not carry out manual regulation, has protected the drilling rod when having reduced workman intensity of labour.

The utility model discloses two sets of hydraulic pressure clamping parts, bilateral symmetry set up, and the axis keeps flushing, and is high to the centering degree, and the centre of a circle position of slips is unanimous with the central altitude point of design in the use, does not receive the influence of slips wearing and tearing, and the precision is high, can avoid receiving eccentric moment impaired of drilling rod screw when unscrewing the drilling rod.

The utility model discloses elastic connection can adopt the dish spring of a small amount of big specifications, and shock resistance is strong, and in case damage has great sound of splitting, is easily discoverable, is convenient for in time change and avoids influencing the operation progress.

Drawings

Fig. 1 is a main sectional view of the present invention.

Fig. 2 is a side sectional view of the present invention.

Fig. 3 is an enlarged view of a portion a in fig. 1.

Fig. 4 is a schematic perspective view of the present invention.

Fig. 5 is a schematic view of the slip fitting structure of the present invention.

Fig. 6 is a schematic view of a structure of a prior art clamper.

In the figure: 1. a clamping frame; 2. a slip seat; 3. a seal member; 4. slips; 5. a limit closing plate; 6. an elastic connecting member; 7. a pull rod; 8. a second oil inlet; 9. a hydraulic cylinder block; 10. a first oil inlet; 11. an oil chamber; 12. a sleeve; 13. a piston; 131. a piston head; 132. a piston rod; 14. a gland; 15. a limit stop block; 16. a guide ring; 17. a baffle plate; 18. a chuck base; 19. a dust-proof sleeve; 20. a bearing device; 21. a circlip for the shaft; 22. a drill stem; 23. a piston member of known construction; 24. slip elements of prior construction; 25. spring elements of prior art construction; 26. the oil cylinder with the existing structure.

Detailed Description

The following describes embodiments of the present invention with reference to the drawings.

As shown in fig. 1, 4 and 5, the hydraulic gripper for a drilling machine of the present embodiment includes a gripping frame 1, a hydraulic gripping portion is provided on the gripping frame 1, the hydraulic gripping portion includes a driving member and slips 4 which are driven by the driving member to synchronously approach or depart from, and the slips 4 are distributed around a drill rod 22.

The number of the slips 4 is more than or equal to two, and the slips 4 are centered on the drill pipe 22 when synchronously approaching or departing.

As an implementation mode, two sets of hydraulic clamping parts which are oppositely arranged are arranged on the clamping frame 1, each set of hydraulic clamping parts adopting a hydraulic driving part structurally comprises a hydraulic cylinder 9, a piston 13, a limiting sealing plate 5 and a slip seat 2 for mounting a slip 4, one end of the piston 13 is in sliding fit with the inner wall of the hydraulic cylinder 9, and the limiting sealing plate 5 is fixedly connected with the clamping frame 1 and is matched with the piston 13 to prevent the movement of the piston;

the hydraulic cylinder body 9 is connected with the slip seat 2 through a connecting piece;

a first oil inlet 10 and a second oil inlet 8 are formed in the hydraulic cylinder body 9, and hydraulic oil introduced from the first oil inlet 10 acts on one end of the piston 13 and is used for reversely pushing the hydraulic cylinder body 9 to move; the hydraulic oil introduced into the second oil inlet 8 acts on the slip seat 2 and is used for positively pushing the slips 4 to move.

In one embodiment, the end of the piston 13 that is slidably engaged with the inner wall of the hydraulic cylinder 9 is a piston head 131, an inner end surface of which extends axially a piston rod 132 with a reduced inner diameter, and a cavity that is communicated with the first oil inlet 10 is formed between the outer end surface and the hydraulic cylinder 9.

In one embodiment, the piston rod 132 has an annular groove in the middle, and the position-limiting closing plate 5 has a position-limiting hole matching with the annular groove.

In one embodiment, an oil chamber 11 is formed between the piston rod 132 and the slip bowl 2, a cavity is formed in the piston rod 132, an inlet of the cavity is communicated with the second oil inlet 8, and an outlet of the cavity is communicated with the oil chamber 11.

In one embodiment, the clamping frame 1 is symmetrically provided with sleeves 12 on both sides, a cavity for accommodating the piston rod 132 is formed inside the sleeve 12, one end of the sleeve 12 is fixedly connected with the limiting sealing plate 5, the other end is sleeved with the slip seat 2, and a sealing element 3 is arranged on the sleeved contact surface.

Specifically, as shown in fig. 1, one end of the sleeve 12 is connected to the position-limiting closing plate 5 through a bolt, and the other end is sleeved with the cylindrical connecting section of the slip bowl 2.

Specifically, as shown in fig. 1, a hydraulic-pneumatic O-ring seal is used as the seal 3. Specifically, the inner wall of the sleeve 12 is provided with a mounting groove for mounting the sealing ring.

As an embodiment, the structure of the hydraulic clamping part of the driving component adopting the combination of the oil pressure driving component and the elastic driving component also comprises an elastic connecting piece 6, and the other end of the piston 13 is connected with the slip seat 2 through the elastic connecting piece 6; one end of the elastic connecting piece 6 is connected with the limiting closing plate 5, and the other end is connected with the slip seat 2.

As an embodiment, the elastic connecting member 6 is sleeved on the piston 13 by a disc spring.

The piston rod 132 is fitted with a guide ring 16, and one end thereof is connected to the hydraulic cylinder 9 through a gland 14.

As an embodiment, the connecting piece is a pull rod 7, one end of which is connected with the hydraulic cylinder 9 through a fastener, and the other end of which is in threaded connection with the slip seat 2.

Specifically, one end of the pull rod 7 is connected with an ear seat on the outer wall of the hydraulic cylinder body 9 through a cap nut and a hexagon nut, and the other end of the pull rod is in threaded connection with a threaded hole on the slip seat 2.

As shown in fig. 2, as an embodiment, the clamping frame 1 is provided with chuck seats 18 aligned with the axis of the slips 4 at both ends of the slip seat 2, wherein one end of the chuck seat 18 is provided with a dust cover 19 through a bearing device 20.

Specifically, the bearing device 20 includes a bearing seat, which is connected with the chuck seat 18 through a bearing seat sleeve, and a deep groove ball bearing matched with the dust-proof sleeve 19 is installed in the bearing seat, specifically, a shaft circlip 21 is arranged on the deep groove ball bearing.

Specifically, the inner end surface of the chuck seat 18 is connected with the baffle 17, and the inner end surface of the baffle is abutted against the slip seat 2.

Specifically, the slip bowl 2 is provided with limit stoppers 15 at two ends of the slip 4.

Specifically, the slips 4 of each set of hydraulic gripping portions are arranged oppositely, and move in opposite directions when being clamped and move in opposite directions when being loosened.

Specifically, when pressure oil enters the hydraulic cylinder body 9 from the first oil inlets 10 on both sides, the pressure oil acts on the rodless cavity between the outer end face of the piston head 131 and the inner end face of the hydraulic cylinder body 9 to apply pressure to the piston head 131, and because the piston rod 132 is fixed on the sleeve 12 of the clamping frame 1 by the limiting sealing plate 5 and cannot move, the oil pressure reacts on the hydraulic cylinder body 9, the hydraulic cylinder body 9 is pushed to move relative to the piston 13, and the slip seat 2 is driven to synchronously displace by the pull rod 7, at this time, the two groups of hydraulic clamping portions synchronously move in opposite directions, as shown in fig. 1, the two groups of slip seats 2 move in opposite directions, and the two groups of slips 4 are synchronously loosened. Correspondingly, the synchronous clamping of the left and right slips 4 can be realized only by cutting off the pressure oil entering the first oil inlets 10 on the two sides.

As shown in fig. 4 and 5, the benefits of simultaneous gripping and simultaneous release of the two sets of slips 4 are: the stress is synchronous when the drill rod is clamped and loosened, the damage to the drill rod is small, and the effect is high.

Specifically, an elastic connecting member 6 may be sleeved on the piston 13, and an elastic member such as a disc spring may be used. When the clamping is carried out, pressure oil entering the first oil inlet 10 is cut off, the disc spring is in a compressed state and can provide power for clamping the slips 4, and the sequence of the clamping action is opposite to that of the loosening action.

Specifically, in addition to the clamping force provided by the disc spring, the clamping force is assisted by the pressure oil entering from the second oil inlet 8, and the hydraulic oil enters the hydraulic cylinder 9 from the second oil inlet 8, flows into the oil cavity 11 from the cavity in the piston rod 132, and acts on the slip seat 2 to clamp the slip 4.

In the hydraulic clamp for the drilling machine of the embodiment, two paths of pressure oil action paths are shown by dotted arrows in fig. 1 and 3.

Moreover, even if the elastic connecting piece 6 is not arranged, the second oil inlet 8 is used for introducing pressure oil, the clamping of the drill rod by the slips 4 can be realized, in the embodiment, the main function of the elastic connecting piece 6 is that the power of the equipment disappears suddenly, and when the hydraulic oil introduced by the first oil inlet 10 cannot provide clamping force, the elastic connecting piece 6 is responsible for providing clamping force, so that the drilling accident (the drill rod falls into the hole bottom from the orifice or falls out from the hole bottom) is prevented, and the safety is greatly improved.

Specifically, due to the design that the second oil inlet 8 is filled with pressure oil, the pressure of the slips 4 for clamping the drill rod is variable through adjustment of hydraulic pressure of the hydraulic oil circuit, preferably when the drill rod is unscrewed, for a difficult-to-dismount buckle, the clamping force of the slips of the clamp can rise along with the rise of the unscrewing oil pressure, the situation that the drill rod slips due to too much clamping force of the rotary chuck on the drill rod and too much clamping force of the slips of the clamp on the drill rod is avoided, meanwhile, the easy-to-dismount buckle, the loose clamp, the difficult-to-dismount buckle and the tight clamp are achieved, and the damage to the drill rod due to excessive clamping is greatly reduced.

Specifically, the elastic connecting piece 6 adopts a small number of disc springs with large specifications, and the disc springs are large in specification (preferably, the range of the outer diameter is more than 80 mm), so that the disc springs have large breaking sound once being damaged, are easy to find and are convenient to replace in time. Meanwhile, the shock resistance is strong, and the special oil circuit design is matched, so that the drill bit is prevented from running, and the reliability is improved.

Specifically, the hydraulic cylinder 9 can automatically compensate the abrasion loss of the slips 4, manual adjustment is not needed, the labor intensity of workers is reduced, and meanwhile the drill rod is protected.

As shown in fig. 6, the existing holder includes two oil cylinders 26 of the existing structure, two piston members 23 of the existing structure, two sets of spring members 25 of the existing structure, slip members 24 of the existing structure of the lower part are installed on the two piston members 23 of the existing structure through the connecting seat, slip members 24 of the existing structure of the upper part are installed on the two oil cylinders 26 of the existing structure through the connecting seat, the slip members 24 of the two existing structures are arranged relatively, the piston pushes the lower slip to open first, the pulling force of the spring members 25 of the existing structure is utilized after reaching the limit position, so that the upper slip is opened, the actions are asynchronous, the time is long, and the stress of the drill rod is asynchronous, which causes the drill rod to be easily deformed and damaged. The centre of a circle position of slips and the central altitude point of design appear the difference in height easily from top to bottom, and according to the slips wearing and tearing volume of needs, this difference in height's maximum value is 1mm, and this when unscrewing the drilling rod, can produce certain damage to the drilling rod screw thread. In addition, after the slips are worn in long-term use, the nut needs to be adjusted to offset the wear, and the clamping force of the clamp on the drill rod is weakened during the use process.

The current holder mechanism of contrast, the utility model discloses two sets of hydraulic pressure clamping part, bilateral symmetry sets up, and the axis keeps flushing, and is high to the centering degree, and the centre of a circle position of slips is unanimous with the central altitude point of design in the use, does not receive the influence of slips wearing and tearing, and the precision is high, can avoid receiving eccentric moment impaired of drilling rod screw when unscrewing the drilling rod. The abrasion loss of the slips can be automatically compensated through the hydraulic oil cylinder body, manual adjustment is not needed, the labor intensity of workers is reduced, and meanwhile the drill rod is protected.

Claims

1. The hydraulic clamping device for the drilling machine comprises a clamping frame (1) and is characterized in that a hydraulic clamping portion is arranged on the clamping frame (1), the hydraulic clamping portion comprises a driving part and slips (4) which are driven by the driving part to be close to or far away synchronously, and the slips (4) are distributed around a drill rod (22).

2. A hydraulic gripper for drilling machines according to claim 1, characterized in that said slips (4) are more than or equal to two in number, said slips (4) being centred on the drill rod (22) when synchronously approaching or departing.

3. The hydraulic clamp for a drill according to claim 1, wherein the drive member comprises an oil pressure drive member or a combination of both an oil pressure drive member and a resilient drive member.

4. The hydraulic clamp holder for the drilling machine according to one of the claims 1 to 3, characterized in that the hydraulic clamping parts are arranged in two groups and are oppositely arranged, the structure of each group of hydraulic clamping parts comprises a hydraulic cylinder body (9), a piston (13), a limit closing plate (5) and a slip seat (2) for installing slips (4), one end of the piston (13) is in sliding fit with the inner wall of the hydraulic cylinder body (9), and the limit closing plate (5) is fixedly connected with the clamping frame (1) and is matched with the piston (13) to prevent the movement of the piston; the hydraulic cylinder body (9) is connected with the slip seat (2) through a connecting piece;

a first oil inlet (10) and a second oil inlet (8) are formed in the hydraulic cylinder body (9), and hydraulic oil introduced from the first oil inlet (10) acts on one end of the piston (13) and is used for reversely pushing the hydraulic cylinder body (9) to move; and hydraulic oil introduced from the second oil inlet (8) acts on the slip seat (2) and is used for positively pushing the slip (4) to move.

5. The hydraulic clamp for drilling machine according to claim 4, characterized in that the structure of the hydraulic clamp part further comprises an elastic connector (6), and the other end of the piston (13) is connected with the slip bowl (2) through the elastic connector (6); one end of the elastic connecting piece (6) is connected with the limiting sealing plate (5), and the other end of the elastic connecting piece is connected with the slip seat (2).

6. The hydraulic clamp for the drilling machine according to claim 4, characterized in that one end of the piston (13) in sliding fit with the inner wall of the hydraulic cylinder body (9) is a piston head (131), the inner end surface of the piston head axially extends to form a piston rod (132) with a reduced inner diameter, and a cavity communicated with the first oil inlet (10) is formed between the outer end surface and the hydraulic cylinder body (9); a cavity is arranged in the piston rod (132).

7. The hydraulic clamp holder for the drilling machine according to claim 6, wherein the piston rod (132) is provided with an annular clamping groove in the middle, and the limiting sealing plate (5) is provided with a limiting hole matched with the annular clamping groove.

8. The hydraulic clamp for the drilling machine according to claim 7, characterized in that an oil cavity (11) is formed between the piston rod (132) and the slip seat (2), and a cavity inlet arranged in the piston rod (132) is communicated with the second oil inlet (8) and an outlet is communicated with the oil cavity (11).

9. The hydraulic clamp holder for the drilling machine according to any one of claims 6 to 8, characterized in that the clamp holder (1) is symmetrically provided with a sleeve (12) at two sides, a cavity for accommodating the piston rod (132) is formed inside the sleeve (12), one end of the sleeve (12) is fixedly connected with the limit closing plate (5), the other end of the sleeve is sleeved with the slip seat (2), and a sealing element (3) is arranged on the sleeved contact surface.