Kilometer directional drilling machine holder with deslagging function

Abstract

The utility model provides a kilometer directional drilling machine holder with a deslagging function, which belongs to the technical field of drilling machine accessories and comprises a shell, a front end cover, a transition sleeve, a rear end cover, a hydraulic control one-way valve, a piston, a chuck and a clamping block. According to the gripper of the kilometer directional drilling machine, the slag discharging opening is formed in the transition sleeve, in the moving process of the piston, coal slag, broken stone, dust and other impurities between the piston and the shell and between the piston and the transition sleeve are discharged through the slag discharging opening, the durability of the piston, a sealing piece and other easily-damaged and easily-consumed parts is improved, the replacement frequency is reduced, and the production cost is reduced. And meanwhile, the workload of after-sales service personnel is also reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of drilling rig accessories, and specifically discloses a gripper for a kilometer directional drilling rig with slag discharging function. Background Art

[0002] The gripper of the drilling rig is used to apply a fastening force to the drill pipe, drive the drill pipe to rotate and move forward and backward to enter the working state. For the rear gripper of the large-torque drilling rig of CN211623360U applied by the applicant, multiple clamping blocks can be clamped and loosened simultaneously, improving the stress condition of the drill pipe. Through hydraulic reset, the problem of reset failure existing in spring reset is avoided. The structure is simpler, the number of seals used is less, it is convenient for maintenance, the performance is reliable, and it is more suitable for use in large-torque drilling rigs.

[0003] However, the existing kilometer directional drilling rigs have been carrying out drilling operations in underground drainage working faces with dense dust and serious pollution for a long time. Due to the large moving stroke of the piston, and in order to consider the tolerance fit and the displacement of the clamping block during the design of the chuck, there are large gaps, and various impurities such as coal slag, gravel, and dust are easy to enter between the piston and the outer shell and the transition sleeve, intensifying the wear of the piston, seals, etc. In the long run, it not only pollutes the hydraulic oil circuit of the drilling rig, but also leads to frequent disassembly and assembly of the gripper of the drilling rig to replace the seals, greatly reducing the service life of vulnerable parts and seriously affecting the working efficiency of the drilling rig, making the after-sales service personnel go out frequently. Summary of the Utility Model

[0004] The utility model provides a gripper for a kilometer directional drilling rig with slag discharging function to improve the technical problem that impurities are easy to enter between the piston and the outer shell and the transition sleeve during drilling operations, intensifying the wear of the piston, seals, etc.

[0005] The utility model provides a gripper for a kilometer directional drill with slag discharging function, which comprises a housing, a front end cover, a transition sleeve, a rear end cover, a hydraulic control one-way valve, a piston, a chuck and clamping blocks; the housing is a hollow cylindrical structure, the inner wall is provided with an annular piston groove, and an annular transition sleeve mounting groove is arranged from the front end face to the piston groove. An insertion groove, a first oil passage and a second oil passage extending into the barrel wall are arranged on the rear end face; the transition sleeve is a stepped structure, including a front section sleeve and a rear section sleeve. The rear section sleeve is inserted into the transition sleeve mounting groove, the rear end face of the front section sleeve is attached to the front end face of the housing, and a radially penetrating slag discharging port is arranged on the front end face of the front section sleeve; the front end cover is located in front of the transition sleeve and is connected to the front end face of the front section sleeve; the rear end cover is located behind the housing and is connected to the rear end face of the housing. Oil holes corresponding to the first oil passage and the second oil passage are arranged on the rear end cover; the hydraulic control one-way valve is inserted into the insertion groove, the oil inlet is communicated with the first oil passage, and the oil outlet is communicated with the rear end of the piston groove; the second oil passage is communicated with the front end of the piston groove; the piston is located inside the housing and the transition sleeve, and includes a piston column and a piston disc surrounding the outside of the piston column; the piston column is a hollow structure, the front section is attached to the inner wall of the transition sleeve, and a plurality of clamping block mounting grooves are arranged on the inner wall from the front end face; the depth of the clamping block mounting groove gradually decreases from front to back, and an anti-drop groove is arranged on the side; the piston disc is in sealed sliding contact with the piston groove; the chuck penetrates into the piston column from the front end cover and is attached to the inner wall of the piston column. Clamping block clamping grooves corresponding to the clamping block mounting grooves are arranged from the rear end face forward; the clamping blocks are located in the space enclosed by the clamping block mounting grooves and the clamping block clamping grooves, and the anti-drop protrusions on the side are inserted into the anti-drop grooves.

[0006] In the above-mentioned gripper for a kilometer directional drill, a circular positioning boss is arranged at the center position of the rear end face of the front end cover; a circular positioning groove is arranged at the center position of the front end face of the front section sleeve; the circular positioning boss is inserted into the circular positioning groove.

[0007] In the above-mentioned gripper for a kilometer directional drill, the slag discharging port includes an isosceles trapezoidal groove located on the circular positioning groove and a square groove located outside the isosceles trapezoidal groove; the width of the isosceles trapezoidal groove gradually decreases from the center of the front section sleeve to the outside.

[0008] In the above-mentioned gripper for a kilometer directional drill, the slag discharging ports are arranged at equal intervals around the central axis of the transition sleeve.

[0009] In the above-mentioned gripper for a kilometer directional drill, seal ring mounting grooves are arranged on the inner wall of the housing, on the piston disc and on the inner wall of the transition sleeve; seal rings are installed in the seal ring mounting grooves; the seal ring mounting groove on the housing is located between the positioning sleeve mounting groove and the piston groove; the seal ring mounting groove on the transition sleeve is close to the rear end of the transition sleeve.

[0010] The above-mentioned kilometer directional drilling rig gripper further includes a positioning sleeve; the outer shell is provided with an annular positioning sleeve installation groove facing forward from the rear end surface; the positioning sleeve is installed in the positioning sleeve installation groove, and its inner diameter is adapted to the outer diameter of the rear section of the piston column.

[0011] In the above-mentioned kilometer directional drilling rig gripper, an annular wear-resistant ring installation groove is provided on the inner wall of the piston column near the rear end face; a wear-resistant ring is installed in the wear-resistant ring installation groove.

[0012] In the above-mentioned kilometer directional drilling rig gripper, branch roads extending to the outer wall of the outer shell are provided on both the first oil path and the second oil path; an oil plug is arranged in the branch road.

[0013] In the above-mentioned kilometer directional drilling rig gripper, the front end cover and the transition sleeve are installed at the front end of the outer shell through bolts, and the rear end cover is installed at the rear end of the outer shell through bolts.

[0014] Compared with the prior art, the utility model has the following beneficial effects.

[0015] 1. For the kilometer directional drilling rig gripper provided by the utility model, a slag discharge port is arranged on the transition sleeve. During the movement of the piston, impurities such as coal slag, crushed stones, and dust between the piston and the outer shell and the transition sleeve are discharged through the slag discharge port, improving the durability of vulnerable parts such as the piston and seals, reducing the replacement frequency, and at the same time reducing the workload of after-sales service personnel.

[0016] 2. Reduce the pollution of impurities to the hydraulic oil path of the drilling rig, extend the service life of the drilling rig, and greatly improve the working efficiency of the drilling operation in the coal mine underground drainage working face. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 It is a schematic structural diagram of a kilometer directional drilling rig gripper with slag discharge function;

[0019] Figure 2 For Figure 1 the rear view of;

[0020] Figure 3 For Figure 2 the sectional view in the A-A direction of;

[0021] Figure 4 For Figure 2 the sectional view in the B-B direction of;

[0022] Figure 5 is Figure 2 A sectional view in the C-C direction in

[0023] Figure 6 is Figure 1 A schematic structural view of the outer shell in the chuck of the kilometer directional drilling rig shown in

[0024] Figure 7 is Figure 6 A sectional view in the D-D direction in

[0025] Figure 8 is Figure 1 A schematic structural view of the front end cover in the chuck of the kilometer directional drilling rig shown in

[0026] Figure 9 is Figure 1 A schematic structural view of the transition sleeve in the chuck of the kilometer directional drilling rig shown in

[0027] Figure 10 is Figure 1 A schematic structural view of the piston in the chuck of the kilometer directional drilling rig shown in

[0028] Figure 11 is Figure 1 A schematic structural view of the chuck in the chuck of the kilometer directional drilling rig shown in

[0029] Figure 12 is Figure 1 A schematic structural view of the clamping block in the chuck of the kilometer directional drilling rig shown in

[0030] In the figure: 1 - outer shell; 1.1 - piston groove; 1.2 - cartridge slot; 1.3 - first oil passage; 1.4 - second oil passage; 1.5 - transition sleeve mounting groove; 1.6 - positioning sleeve mounting groove; 2 - front end cover; 2.1 - annular positioning boss; 3 - transition sleeve; 3.1 - slag discharge port; 3.2 - annular positioning groove; 4 - rear end cover; 5 - pilot operated check valve; 6 - piston; 6.1 - clamping block mounting groove; 6.2 - anti-drop groove; 7 - chuck; 7.1 - clamping block clamping groove; 8 - clamping block; 8.1 - anti-drop projection; 9 - positioning sleeve; 10 - wear-resistant ring; 11 - seal ring mounting groove; 12 - seal ring; 13 - bolt; 14 - oil plug. Specific embodiments

[0031] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0032] This embodiment provides a chuck for a kilometer directional drill with slag discharging function, which includes a housing 1, a front end cover 2, a transition sleeve 3, a rear end cover 4, a hydraulic control check valve 5, a piston 6, a chuck 7 and a clamping block 8; the housing 1 is a hollow cylindrical structure, with an annular piston groove 1.1 provided on the inner wall, and an annular transition sleeve installation groove 1.5 is provided from the front end face to the piston groove 1.1. An insertion groove 1.2, a first oil passage 1.3 and a second oil passage 1.4 extending into the cylinder wall are provided on the rear end face; the transition sleeve 3 is a stepped structure, including a front section sleeve and a rear section sleeve. The rear section sleeve is inserted into the transition sleeve installation groove, the rear end face of the front section sleeve is attached to the front end face of the housing, and a radially penetrating slag discharging port 3.1 is provided on the front end face of the front section sleeve; the front end cover 2 is located in front of the transition sleeve 3 and is connected to the front end face of the front section sleeve; the rear end cover 4 is located behind the housing 1 and is connected to the rear end face of the housing 1. Oil holes corresponding to the first oil passage 1.3 and the second oil passage 1.4 are provided on the rear end cover 4; the hydraulic control check valve 5 is inserted into the insertion groove 1.2, the oil inlet is communicated with the first oil passage 1.3, and the oil outlet is communicated with the rear end of the piston groove 1.1; the second oil passage 1.4 communicates with the front end of the piston groove 1.1; the piston 6 is located inside the housing, including a piston column and a piston disc surrounding the outside of the piston column; the piston column is a hollow structure, and a plurality of clamping block installation grooves 6.1 are provided on the inner wall from the front end face; the depth of the clamping block installation groove 6.1 gradually decreases from front to back, and an anti-drop groove 6.2 is provided on the side; the piston disc is in sealed sliding contact with the piston groove 1.1; the chuck 7 penetrates into the piston column from the front end cover 2 and fits with the inner wall of the piston column, and a clamping block clamping groove 7.1 corresponding to the clamping block installation groove 6.1 is provided from the rear end face forward; the clamping block 8 is located in the space enclosed by the clamping block installation groove 6.1 and the clamping block clamping groove 7.1, and the anti-drop protrusion 8.1 on the side is inserted into the anti-drop groove 6.2 to realize sliding installation with the clamping block installation groove 6.1.

[0033] In the above-mentioned chuck for a kilometer directional drill, a circular positioning boss 2.1 is provided at the center position of the rear end face of the front end cover 2; a circular positioning groove 3.2 is provided at the center position of the front end face of the front section sleeve; the circular positioning boss 2.1 is inserted into the circular positioning groove 3.2 to realize the installation and positioning of the front end cover 2 and the transition sleeve 3.

[0034] In the above-mentioned chuck for a kilometer directional drill, the slag discharging port 3.1 includes an isosceles trapezoidal groove located on the circular positioning groove 3.2 and a square groove located outside the isosceles trapezoidal groove; the width of the isosceles trapezoidal groove gradually decreases from the center of the front section sleeve to the outside. The combined design of the isosceles trapezoidal groove and the square groove can enable impurities such as coal slag, crushed stones, and dust between the piston 6 and the housing 1 and the transition sleeve 3 to quickly enter the slag discharging port 3.1 under the push of the piston 6, improving the slag discharging speed.

[0035] In the above-mentioned chuck of the kilometer directional drilling rig, the slag discharge ports 3.1 are arranged at equal intervals around the central axis of the transition sleeve 3 to achieve uniform slag discharge. The above-mentioned chuck of the kilometer directional drilling rig further includes a positioning sleeve 9; the housing 1 is provided with an annular positioning sleeve installation groove 1.6 from the rear end face forward; the positioning sleeve 9 is installed in the positioning sleeve installation groove 1.6, and its inner diameter is adapted to the outer diameter of the rear section of the piston rod, which can not only position the installation of the piston 6 but also does not affect the movement of the piston 6. The positioning sleeve 9 is made of a copper sleeve.

[0036] In the above-mentioned chuck of the kilometer directional drilling rig, an annular wear-resistant ring installation groove is provided on the inner wall of the piston rod near the rear end face; a wear-resistant ring 10 is installed in the wear-resistant ring installation groove.

[0037] In the above-mentioned chuck of the kilometer directional drilling rig, sealing ring installation grooves 11 are provided on the inner wall of the housing 1, on the piston disc, and on the inner wall of the transition sleeve 3; sealing rings 12 are installed in the sealing ring installation grooves to improve the overall sealing performance; the sealing ring installation groove 11 on the housing 1 is located between the positioning sleeve installation groove 1.6 and the piston groove 1.1; the sealing ring installation groove 11 on the transition sleeve 3 is close to the rear end of the transition sleeve 3.

[0038] In the above-mentioned chuck of the kilometer directional drilling rig, the front end cover 2 and the transition sleeve 3 are installed at the front end of the housing 1 through bolts 13, and the rear end cover 3 is installed at the rear end of the housing 1 through bolts 13.

[0039] In the above-mentioned chuck of the kilometer directional drilling rig, branch roads extending to the outer wall of the housing 1 are provided on both the first oil circuit 1.3 and the second oil circuit 1.4; an oil plug 14 is provided in the branch road. During maintenance, the oil plug 14 can be pulled out for oil drainage.

[0040] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A chuck of a kilometer directional drill with slag discharging function, characterized in that, It includes a housing, a front end cover, a transition sleeve, a rear end cover, a pilot-operated check valve, a piston, a chuck and a clamping block; The housing is a hollow cylindrical structure, with an annular piston groove provided on the inner wall, an annular transition sleeve mounting groove provided from the front end face to the piston groove, and an insertion groove, a first oil passage and a second oil passage extending into the cylinder wall opened on the rear end face; The transition sleeve is a stepped structure, including a front section sleeve and a rear section sleeve. The rear section sleeve is inserted into the transition sleeve mounting groove, the rear end face of the front section sleeve fits with the front end face of the housing, and a radially penetrating slag discharge port is provided on the front end face of the front section sleeve; The front end cover is located in front of the transition sleeve and is connected to the front end face of the front section sleeve; The rear end cover is located behind the housing and is connected to the rear end face of the housing. Oil holes corresponding to the first oil passage and the second oil passage are provided on the rear end cover; The pilot-operated check valve is inserted into the insertion groove, the oil inlet is communicated with the first oil passage, and the oil outlet is communicated with the rear end of the piston groove; The second oil passage is communicated with the front end of the piston groove; The piston is located inside the housing and the transition sleeve, and includes a piston rod and a piston disc surrounding the outside of the piston rod; The piston rod is a hollow structure, the front section fits with the inner wall of the transition sleeve, and a plurality of clamping block mounting grooves are opened on the inner wall from the front end face; The depth of the clamping block mounting groove gradually decreases from front to back, and an anti-dropping groove is opened on the side; The piston disc is in sealed sliding contact with the piston groove; The chuck penetrates into the piston rod from the front end cover and fits with the inner wall of the piston rod. A clamping block clamping groove corresponding to the clamping block mounting groove is opened from the rear end face forward; The clamping block is located in the space enclosed by the clamping block mounting groove and the clamping block clamping groove, and the anti-dropping protrusion on the side is inserted into the anti-dropping groove; 2. The gripper of the kilometer directional drill with slag discharging function according to claim 1, characterized in that, A circular positioning boss is provided at the center position of the rear end face of the front end cover; A circular positioning groove is provided at the center position of the front end face of the front section sleeve; The circular positioning boss is inserted into the circular positioning groove; 3. The gripper of the kilometer directional drill with slag discharging function according to claim 2, characterized in that, The slag discharge port includes an isosceles trapezoidal groove located on the circular positioning groove and a square groove located outside the isosceles trapezoidal groove; the width of the isosceles trapezoidal groove gradually decreases from the center of the front section sleeve to the outside; 4. The gripper of the kilometer directional drill with slag discharge function according to any one of claims 1-3, characterized in that, The slag discharge ports are arranged at equal intervals around the central axis of the transition sleeve; 5. The gripper of the kilometer directional drill with slag discharge function according to claim 4, characterized in that, Sealing ring mounting grooves are provided on the inner wall of the housing, on the piston disc and on the inner wall of the transition sleeve; Sealing rings are installed in the sealing ring mounting grooves; The sealing ring mounting groove on the housing is located between the positioning sleeve mounting groove and the piston groove; The sealing ring mounting groove on the transition sleeve is close to the rear end of the transition sleeve; 6. The gripper of the kilometer directional drill with slag discharge function according to claim 5, characterized in that, It also includes a positioning sleeve; The housing is provided with an annular positioning sleeve mounting groove from the rear end face forward; The positioning sleeve is installed in the positioning sleeve mounting groove, and the inner diameter is adapted to the outer diameter of the rear section of the piston rod; 7. The gripper of the kilometer directional drill with slag discharge function according to claim 6, characterized in that, An annular wear-resistant ring mounting groove is provided on the inner wall of the piston rod near the rear end face; A wear-resistant ring is installed in the wear-resistant ring mounting groove; 8. The rear gripper of the high-torque drill according to claim 7, characterized in that Branch roads extending to the outer wall of the housing are provided on both the first oil passage and the second oil passage; Oil plugs are provided in the branch roads; 9. The gripper of the kilometer directional drill with slag discharge function according to claim 8, characterized in that, The front end cover and the transition sleeve are installed at the front end of the housing by bolts, and the rear end cover is installed at the rear end of the housing by bolts.

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