Double-position hydraulic chuck and using method thereof

Abstract

The invention relates to a double-position hydraulic chuck and a using method thereof, and belongs to the field of mechanical design. The double-position hydraulic chuck is composed of a rear flange, a slip bowl, a clamping piston, a clamping jaw, a chuck seat and a front flange, and through the unique structural design, rapid and alternate clamping and opening of adjacent drill rods are achieved. When the drill rod is additionally connected, the clamping device and the slip at the end, close to the clamping device, of the chuck work cooperatively, and firm connection of the drill rod is guaranteed. When the drill rod is disassembled, the drill rod is quickly disassembled through the matching of the semi-open state of the chuck and the clamp holder. In addition, the invention further provides a replacement method of the drill rod A3, the drill rod and the water braid are placed between the chuck and the clamp holder by detaching the connection between the water braid and the main shaft, and the power head is rotated, so that the drill rod is replaced. According to the invention, not only is the efficiency of adding and dismounting the drill rod improved, but also the universality and safety of the drilling machine are enhanced, and a more efficient, safer and more economical solution is provided for the operation of the drilling machine in underground working environments such as a coal mine.

Description

Technical Field

[0001] The invention belongs to the field of mechanical design and relates to a double-position hydraulic chuck and a use method thereof. Background Art

[0002] Mining hydraulic drilling rigs are indispensable equipment for coal mine gas control. With the development of technology, automated drilling rigs have become the main development direction and trend of mining hydraulic drilling rigs. Existing mining automatic drilling rigs mainly use active drill rods and double clamps to add and remove drill rods. When removing the drill rod, this method loosens the drill rod by the relative rotation of the double clamps, and then uses the friction between the active drill rod and the drill rod thread to drive the drill rod to rotate, thereby completing the removal of the drill rod.

[0003] However, the existing technology has some shortcomings: each time a drill rod is added, the active drill rod thread needs to be screwed in and out twice, resulting in a large active workload and a reduced service life. The structure of the adding device is complex and cannot be unified with the structure of a conventional drilling rig, resulting in a low degree of commonality of the drilling rig, large structural dimensions, and high requirements for tunnel dimensions. The efficiency of adding drill rods is not high, and a double clamp is required for self-disassembly before the active drill rod and clamp can be used for disassembly. Summary of the invention

[0004] In view of this, the purpose of the present invention is to provide a double-position hydraulic chuck and a method of using the same to solve the above-mentioned problems, realize efficient and automated addition and removal of drill rods, improve the universal design of drilling rigs, and be suitable for hydraulic drilling rigs in underground working environments such as coal mines.

[0005] In order to achieve the above object, the present invention provides the following technical solutions:

[0006] A double-position hydraulic chuck, comprising:

[0007] The rear flange has a connection thread connected to the main shaft of the power head and a plurality of threaded holes connected to the main shaft;

[0008] A slip seat is connected to the rear flange and has a slip groove for installing the slip and threaded holes connected to the front and rear flanges;

[0009] The clamping piston is installed in the slip seat and has two sets of slip grooves, track grooves and sealing ring grooves in different directions;

[0010] Slips, installed in the slip groove of the clamping piston, used to clamp the drill pipe, having a track, a matching surface and a tooth shape;

[0011] The chuck seat is combined with the slip seat, the piston and the chuck seat to form a hydraulic sealing chamber and provide a hydraulic oil channel;

[0012] The front flange is connected to the chuck seat to realize the connection between the chuck and the main shaft of the power head, and provides a hydraulic oil channel for the chuck to transmit the torque and movement of the power head; wherein, the chuck is connected to the main shaft of the power head, and the rear flange has an equilateral multi-sided boss and a water braid shaft to cooperate with the water braid shaft, so as to facilitate the removal of the water braid shaft from the drill pipe shaft.

[0013] Optionally, the chuck is used to achieve alternate clamping and opening of adjacent drill rods, and is combined with a single clamp to achieve automatic addition and removal of drill rods.

[0014] Optionally, when adding a drill rod, the chuck uses a clamp and a cava at the end of the chuck near the clamp to clamp the drill rod, so as to achieve connection with the drill rod clamped by the clamp. When the added drill rod is connected to the drill rod of the clamp, the cava at the end of the chuck near the clamp is loosened and the cava at the end far from the clamp is clamped to achieve connection with the drill rod in the chuck and realize drilling work.

[0015] Optionally, when the drill rod is disassembled, the chuck near the clamp end is loosened to loosen the drill rod and the power head drill rod, and then the chuck slip near the clamp end is used to clamp the drill rod and cooperate with the clamp to realize the disassembly of the drill rod.

[0016] Optionally, when the drill rod in the power head needs to be replaced, the connection between the water braid and the main shaft is removed, the drill rod and the water braid are placed between the chuck and the clamp, the clamp clamps the drill rod, and the polygon at the tail end of the water braid is deformed and matched with the front flange of the chuck to complete the removal of the drill rod and the water braid.

[0017] A method for using a double-position hydraulic chuck, the method is based on the above double-position hydraulic chuck, and comprises the following steps:

[0018] Use a holder to clamp a drill rod A1;

[0019] Move the power head to leave space A2 for placing another drill rod A2;

[0020] Use a robot or manually place the drill pipe A2 to the connection position;

[0021] Adjust the chuck slip C1 to the open position;

[0022] Move the power head D axially to make the chuck slips clamp the drill pipe A2;

[0023] Continue to move the power head D and rotate the main shaft to make the drill rods A1 and A2 threadedly connected;

[0024] Loosen the chuck slip C1 and continue to rotate forward to screw the drill rod A2 and A3 together;

[0025] Release the clamp B and start drilling.

[0026] Optionally, the method further comprises a drill pipe disassembly step, comprising:

[0027] Make the drill pipe A1 / A2 / A3 connected;

[0028] Use a clamp to hold the drill rod A2;

[0029] Make slip C1 in loose state and C2 in clamped state;

[0030] Reverse the chuck of the power head D to separate the drill rods A2 and A3;

[0031] Make slip C1 clamp drill pipe A2, reverse the chuck, and separate drill pipe A2 from A3;

[0032] Remove drill pipe A2;

[0033] The power head moves forward to make the chuck slip C1 clamp the drill rod A1. The clamp releases the drill rod A1. The power head drives the drill rod A1 to the A2 position and clamps the next drill rod. The power head is reversed to separate the drill rod at the A2 position from the drill rod at the A1 position. The slip C1 opens and the drill rod at the A2 position is removed. The cycle is repeated to remove all the drill rods.

[0034] Optionally, the method further comprises the step of replacing the drill rod in the power head, comprising:

[0035] Remove the water braid and the main shaft;

[0036] Adjust the distance between the water braid and the chuck to facilitate the placement of the water braid and drill pipe assembly;

[0037] Use the holder to hold the drill pipe and place the tail polygon of the water braid on the front flange polygon of the chuck;

[0038] Rotate the power head to separate the water braid from the drill pipe to replace the drill pipe.

[0039] The beneficial effects of the present invention are:

[0040] Fast alternating clamping and opening: The structural design of the double-position hydraulic chuck enables fast alternating clamping and opening when adding and removing drill rods, thereby significantly increasing the speed of drill rod replacement and improving overall work efficiency.

[0041] Prolonging the service life of the active drill rod: The method of the present invention prolongs the service life of the active drill rod and reduces the maintenance and replacement costs by reducing the use frequency of the active drill rod.

[0042] Compatible with conventional drilling rig structures: The dual-position hydraulic chuck of the present invention has an optimized structure and is compatible with conventional drilling rig structures, making the drilling rig more versatile, reducing the need for special customized parts, and reducing the overall cost of the equipment.

[0043] Improve the compatibility and application scope of the drilling rig: Through the design of the present invention, the drilling rig can better adapt to drill rods of different sizes and types, thereby improving the compatibility and application scope of the drilling rig.

[0044] Reduced safety risks: The method of the present invention reduces the need for manual operation and reduces the safety risks during operation, which is particularly important in complex underground working environments.

[0045] Optimize space utilization: Since the design of the present invention is more compact, the requirement for working space is reduced, and it is particularly suitable for use in environments such as underground coal mines where space is limited.

[0046] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be described in detail below in conjunction with the accompanying drawings, wherein:

[0048] Figure 1 It is a schematic diagram of the structure of a double-position hydraulic chuck;

[0049] Figure 2 It is the schematic diagram of the front flange;

[0050] Figure 3 for Figure 2 AA section view;

[0051] Figure 4 for Figure 2 BB cross-sectional view;

[0052] Figure 5 This is a schematic diagram of the Cava seat;

[0053] Figure 6 It is a schematic diagram of the clamping piston;

[0054] Figure 7 for Figure 6 AA section view;

[0055] Figure 8 This is a schematic diagram of Kava;

[0056] Fig. 9 is a schematic diagram of a chuck seat;

[0057] Fig.10 for Fig. 9 AA section view;

[0058] Fig.11 This is a schematic diagram of drill pipe connection;

[0059] Fig.12 This is a schematic diagram of the spindle auxiliary structure;

[0060] Fig.13 Schematic diagram of the water braid auxiliary structure.

[0061] Reference numerals:

[0062] Rear flange 1, cava seat 2, clamping piston 3, claw 4, chuck seat 5, front flange 6, connecting thread 11 connected to the power head main shaft, threaded hole 12 connected to the main shaft, locating pin hole 13 connected to the main shaft, torque transmission boss 14 connected to the cava seat, annular groove 15 for installing the sealing ring, threaded through hole 16 connected to the chuck seat, cava groove 21 for installing the cava, threaded hole 22 connected to the front and rear flanges, cava groove 31 on the clamping piston, track groove 32, sealing ring groove 33, track 41, mating surface 42, tooth shape 43, flange connecting screw hole 51, sealing groove 52, oil channel 53. DETAILED DESCRIPTION

[0063] The following describes the embodiments of the present invention by specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the illustrations provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0064] Among them, the drawings are only used for illustrative explanations, and they only represent schematic diagrams rather than actual pictures, and should not be understood as limitations on the present invention. In order to better illustrate the embodiments of the present invention, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of actual products. For those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted.

[0065] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "front", "rear", etc. indicate the orientation or position relationship, they are based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as limiting the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0066] See also Figures 1 to 13 The double-position hydraulic chuck provided by the present invention is exquisitely composed of six parts: 1-rear flange, 2-slip seat, 3-clamping piston, 4-claw, 5-chuck seat, 6-front flange. During use, the chuck is tightly connected to the main shaft of the power head, and the rear flange 1 is designed with an equilateral multi-sided boss 61, which perfectly matches the water braid shaft, making it easy to remove the water braid shaft from the drill pipe shaft.

[0067] The rear flange 1 not only realizes the stable connection between the chuck and the spindle of the power head, but also provides a key hydraulic oil channel to ensure the smooth transmission of torque and movement of the power head. Figure 2 As shown, the rear flange 1 has a connecting thread 11 connected to the main shaft of the power head, a plurality of threaded holes 12 connected to the main shaft, a plurality of positioning pin holes 13 connected to the main shaft, and a torque transmission boss 14 connected to the cava seat.

[0068] The slip seat 2 plays an important role in connecting the front and rear flanges, and simultaneously accommodates the slips and transmits torque. Its structure includes a slip groove 21 for installing the slips and a threaded hole 22 connected with the front and rear flanges.

[0069] The clamping piston 3 is uniquely designed, comprising two sets of slip grooves 31, track grooves 32 and sealing ring grooves 33 in opposite directions, ensuring that the slips move radially along the chuck under the action of the track grooves to achieve precise clamping and opening actions.

[0070] The slip 4 is a key component for clamping the drill pipe, and is composed of a track 41, a matching surface 42 and a tooth shape 43. The track 41 cooperates with the track groove 32 to transmit the clamping force; the matching surface 42 cooperates with the slip groove 21; the tooth surface 43 is composed of a plurality of tooth shapes to increase the friction coefficient and the clamping force.

[0071] The chuck seat 5 is combined with the slip seat, the piston and the chuck seat to form a hydraulic sealing chamber and provide a hydraulic oil channel, which is composed of a flange connection screw hole 61, a sealing groove 52 / 54 and a plurality of oil channels 53.

[0072] The drill pipe connection structure includes a drill pipe A, a clamp B, a two-position hydraulic chuck C, a power head spindle C and a water braid. The water braid transmits torque through the polygon on the water braid shaft and the polygon of the spindle. The polygon at the rear end of the water braid shaft cooperates with the polygon of the front flange to complete the disassembly of the drill pipe and the water braid. The water braid is integrated with the spindle through a fastening device and can transmit torque and propulsion.

[0073] The double-position hydraulic chuck and its working principle of the present invention not only improve the efficiency of adding and removing drill rods, but also enhance the versatility and safety of the drilling rig, and provide a more efficient, safe and economical solution for drilling rig operation in underground working environments such as coal mines.

[0074] How it works

[0075] 1. Working principle of chuck

[0076] (1) Clamping and opening work: By adjusting the components, make the end face of the support rod flush with the end face of the flange. Hydraulic oil is introduced into both ends of the chuck piston. When oil flows into the lower chamber, the upper end slip is clamped and the lower end slip is loosened; conversely, when oil flows into the upper chamber, the lower end slip is clamped and the upper end slip is opened.

[0077] (2) Semi-open state: First, oil is introduced into the upper chamber, and then the screw of the adjusting assembly is adjusted to make the end face of the support rod extend out of the flange end face to half of the piston stroke. Then oil is introduced into the lower chamber to make the piston end face contact with the support rod. At this time, the slip is in a semi-open state.

[0078] Drill pipe connection and removal

[0079] 2. Drill pipe connection and removal

[0080] Drill rod A1 is located in the holder and is the last drill rod in drilling. Drill rod A2 is the location for adding or removing drill rods, while drill rod A3 is located in the power head to transmit torque and is also the original active drill rod.

[0081] 2.1 Drill pipe connection

[0082] (1) The holder holds the drill rod A1 and moves the power head (spindle) to leave space A2.

[0083] (2) Use a robot or manually place drill pipe A2 to the connection position.

[0084] (3) Adjust the chuck slip C1 to the open position.

[0085] (4) Move the power head D (spindle) axially so that the chuck slips clamp the drill pipe A2.

[0086] (5) Continue to move the power head D and rotate the main shaft to screw the drill rods A1 and A2 together.

[0087] (6) Loosen the chuck slip C1 and continue to rotate forward to connect the drill rods A2 and A3.

[0088] (7) Release clamp B and start drilling.

[0089] 2.2 Drill pipe disassembly

[0090] (1) Drill pipes A1 / A2 / A3 are in connected state.

[0091] (2) The clamp holds the drill rod A2.

[0092] (3) Slip C1 is in a loose state and C2 is in a clamped state.

[0093] (4) The chuck of the power head D is reversed to separate the drill rods A2 and A3.

[0094] (5) Slip C1 clamps the drill pipe A2 and reverses the chuck to separate the drill pipe A2 from the drill pipe.

[0095] (6) Remove drill rod A2.

[0096] (7) The power head moves forward, the chuck slip C1 clamps the drill rod A1, the clamp releases the drill rod A1, the power head drives the drill rod A1 to the A2 position, clamps the next drill rod, reverses the power head, separates the drill rod at the A2 position from the drill rod at the A1 position, opens the slip C1, and removes the drill rod at the A2 position; the cycle is repeated in sequence to remove all the drill rods.

[0097] 2.3 Replacement of Drill Pipe A3

[0098] (1) Remove the water braid and the main shaft.

[0099] (2) Adjust the distance between the water braid clamp and the chuck to facilitate the placement of the water braid and drill pipe assembly.

[0100] (3) The holder clamps the drill pipe and places the tail polygon of the water braid on the front flange polygon of the chuck.

[0101] (4) Rotate the power head to separate the water braid from the drill pipe to replace the drill pipe.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution, which should be included in the scope of the claims of the present invention.

Claims

1. A double-position hydraulic chuck, characterized in that: include: The rear flange has a connection thread connected to the main shaft of the power head and a plurality of threaded holes connected to the main shaft; A slip seat is connected to the rear flange and has a slip groove for installing the slip and threaded holes connected to the front and rear flanges; The clamping piston is installed in the slip seat and has two sets of slip grooves, track grooves and sealing ring grooves in different directions; Slips, installed in the slip groove of the clamping piston, used to clamp the drill pipe, having a track, a matching surface and a tooth shape; The chuck seat is combined with the slip seat, the piston and the chuck seat to form a hydraulic sealing chamber and provide a hydraulic oil channel; The front flange is connected to the chuck seat to realize the connection between the chuck and the main shaft of the power head, and provides a hydraulic oil channel for the chuck to transmit the torque and movement of the power head; wherein, the chuck is connected to the main shaft of the power head, and the rear flange has an equilateral multi-sided boss and a water braid shaft to cooperate with the water braid shaft, so as to facilitate the removal of the water braid shaft from the drill pipe shaft.

2. The double-position hydraulic chuck according to claim 1, characterized in that: The chuck is used to realize the alternate clamping and opening of adjacent drill rods, and is combined with a single clamp to realize the automatic addition and removal of drill rods.

3. The double-position hydraulic chuck according to claim 1, characterized in that: When adding a drill rod, the chuck adopts the clamper and the slips at the near clamper end of the chuck to clamp, so as to realize the connection with the drill rod clamped by the clamper. When the added drill rod is connected with the drill rod of the clamper, the slips at the near clamper end of the chuck are loosened, and the slips at the far clamper end are clamped to realize the connection with the drill rod in the chuck and realize the drilling work.

4. The double-position hydraulic chuck according to claim 1, characterized in that: When the drill rod is disassembled, the chuck near the clamp end is loosened to loosen the drill rod and the power head drill rod, and then the chuck slip near the clamp end is used to clamp the drill rod and cooperate with the clamp to realize the disassembly of the drill rod.

5. The double-position hydraulic chuck according to claim 1, characterized in that: When the drill rod in the power head needs to be replaced, the connection between the water braid and the main shaft is removed, the drill rod and the water braid are placed between the chuck and the clamp, the clamp clamps the drill rod, and the polygon at the tail end of the water braid is deformed and matched with the front flange of the chuck to complete the removal of the drill rod and the water braid.

6. A method for using a double-position hydraulic chuck, characterized in that: The method is based on the double-position hydraulic chuck described in any one of claims 1 to 5, comprising the following steps: Use a holder to clamp a drill rod A1; Move the power head to leave space A2 for placing another drill rod A2; Use a robot or manually place the drill pipe A2 to the connection position; Adjust the chuck slip C1 to the open position; Move the power head D axially to make the chuck slips clamp the drill pipe A2; Continue to move the power head D and rotate the main shaft to make the drill rods A1 and A2 threadedly connected; Loosen the chuck slip C1 and continue to rotate forward to screw the drill rod A2 and A3 together; Release the clamp B and start drilling.

7. The method for using the double-position hydraulic chuck according to claim 6, characterized in that: The method further comprises a drill pipe disassembly step, comprising: Make the drill pipe A1 / A2 / A3 connected; Use a clamp to hold the drill rod A2; Make slip C1 in loose state and C2 in clamped state; Reverse the chuck of the power head D to separate the drill rods A2 and A3; Make slip C1 clamp drill pipe A2, reverse the chuck, and separate drill pipe A2 from A3; Remove drill pipe A2; The power head moves forward to make the chuck slip C1 clamp the drill rod A1. The clamp releases the drill rod A1. The power head drives the drill rod A1 to the A2 position and clamps the next drill rod. The power head is reversed to separate the drill rod at the A2 position from the drill rod at the A1 position. The slip C1 opens and the drill rod at the A2 position is removed. The cycle is repeated to remove all the drill rods.

8. The method for using the double-position hydraulic chuck according to claim 6, characterized in that: The method further comprises the step of replacing the drill rod in the power head, comprising: Remove the water braid and the main shaft; Adjust the distance between the water braid and the chuck to facilitate the placement of the water braid and drill pipe assembly; Use the holder to hold the drill pipe and place the tail polygon of the water braid on the front flange polygon of the chuck; Rotate the power head to separate the water braid from the drill pipe to replace the drill pipe.

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