Adaptive clamping device and clamping method

Abstract

This invention proposes an adaptive clamping device and clamping method. The device includes a pair of mounting seats and two pairs of floating seats. A clamping space for clamping drill pipes is formed between the opposing surfaces of the pair of mounting seats. Each mounting seat has a pair of floating grooves distributed radially and vertically along the drill pipe. The floating grooves include an interconnected intermediate groove and a side groove. The inner wall of the intermediate groove fits into the first part of the floating seat. The floating seat can rotate along the inner wall of the corresponding intermediate groove. The second part of the floating seat is fixed to the first part, and its side facing the clamping space has a mounting groove for mounting slips. The slips extend radially along the drill pipe and have teeth for engaging with the external threads of the drill pipe. The side groove is used to mount a baffle, which includes a locking slot for engaging the baffle. The baffle limits the floating seat along the axial direction of the drill pipe. This invention can achieve direct clamping of drill pipes of different diameters without changing the slips.

Description

Technical Field

[0001] This invention belongs to the field of drill pipe clamping technology, and particularly relates to an adaptive clamping device and clamping method. Background Technology

[0002] To ensure safe and intelligent coal mine production, the demand for advanced drilling equipment for gas drainage and water control is rapidly increasing. Coal mine tunnel drilling rigs and directional drilling rigs are the main equipment for borehole construction. Advanced drilling technology for gas drainage and water control utilizes the drilling rig to first create a pilot hole in high-gas strata. Then, depending on the actual situation, methods such as hole enlargement and screen pipe installation are used to complete the pipeline pre-embedding before gas drainage; or casing is installed before water control.

[0003] During this process, the diameters of the screen pipe, casing, and drill rod are not entirely the same, requiring pipe pre-embedding using methods such as changing slips or even manual labor. Changing slips during construction is problematic because slips are consumable parts, making spare parts management inconvenient for both the manufacturer and the construction team. Furthermore, standard slips are large and costly. Manual pipe pre-embedding is time-consuming and carries both labor and construction risks. To address this, an adaptive drill rod clamping device suitable for tunnel drilling rigs was invented. Summary of the Invention

[0004] The purpose of this invention is to provide an adaptive clamping device and clamping method, which can directly clamp drill pipes of different diameters without changing the slips. To achieve the above objective, the technical solution adopted is as follows:

[0005] An adaptive clamping device, comprising:

[0006] A pair of mounting seats 601 and two pairs of floating seats 602, wherein a clamping space for clamping the drill pipe is formed between the opposing surfaces of the pair of mounting seats 601, the clamping space extending radially along the drill pipe;

[0007] A pair of mounting seats 601 are spaced apart to form an open state; a pair of mounting seats 601 are close to the stone to form a clamped state; each mounting seat 601 has a pair of floating grooves distributed vertically and vertically along the radial direction of the drill rod; the floating grooves are correspondingly arranged with the floating seats 602 and include an intermediate groove and a side groove that are interconnected.

[0008] The inner wall of the intermediate groove fits into the first part of the floating seat 602; the floating seat 602 can rotate along the inner wall of the corresponding intermediate groove; the second part of the floating seat 602 is fixed to the first part, and an installation groove for installing the slip 603 is opened on its side facing the clamping space; the slip 603 extends radially along the drill rod, and has retaining teeth for contacting the external thread of the drill rod.

[0009] The side groove is used to install the baffle 604, and includes a slot for engaging the baffle 604;

[0010] The baffle 604 is used to limit the floating seat 602 along the axial direction of the drill rod and to restrict the rotation of the floating seat 602. It is arranged correspondingly to the floating seat 602, and is fixed to the first part of the floating seat 602 by a locking member and adapted to the corresponding side groove, and covers the second part of the floating seat 602.

[0011] Preferably, the baffle 604 comprises:

[0012] The fixing part is connected to the first part of the floating seat 602 by fasteners and is adapted to the side groove of the floating groove;

[0013] An end cap is fixed to one end of the fixing part that extends out of the side groove, and the end cap and the fixing part form a groove that engages with the side groove.

[0014] Rotate the end cover to make the first part of the baffle 604 rotate in the middle groove of the floating groove. When the snap-fit ​​of the side groove matches the snap-fit ​​groove, the baffle 604 stops rotating.

[0015] Preferably, it further includes: a floating base 1 for limiting the mounting base 601, comprising:

[0016] Mounting base 101;

[0017] The pin 102 is rotatably mounted on the fixed seat 101 along the radial direction of the drill rod;

[0018] The sliding base plate 104 has one end engaged with the through groove of the lower section of the corresponding mounting base 601, and the through groove can slide along the corresponding sliding base plate 104 to achieve an open or closed state. The other end of the sliding base plate 104 is engaged with the corresponding pin 102.

[0019] The floating spring 103 is used to allow the mounting base 601 to float along the direction of the drill rod when the drill rod is uncoupled, so as to avoid damaging the external thread of the drill rod. It is sleeved on the corresponding pin 102 and located between the corresponding fixed base 101 and the sliding base plate 104.

[0020] Preferably, it further includes:

[0021] The large hydraulic cylinder 2 is used to separate the two mounting seats 601 to form an open state. Its cylinder body is fixedly installed, and its piston rod extends radially along the drill rod and is fixed to a jacking cylinder. The jacking cylinder is sleeved on its cylinder body. A jacking pin is provided on the end face of the jacking cylinder away from the cylinder body. The jacking pin passes through one of the mounting seats 601 that is close to it and contacts the end face of the other mounting seat 601.

[0022] Small hydraulic cylinder 9 is used to bring the two mounting seats 601 close together to form a clamping state. Its cylinder body is fixedly set, and its piston rod extends radially along the drill rod and is fixed to a mounting seat 601 away from the large hydraulic cylinder 2.

[0023] Preferably, it further includes:

[0024] Screw 3 and sleeve 5, wherein the screw 3 is used to guide a pair of mounting seats 601, which pass sequentially through the cylinder body fixing seat of the large oil cylinder 2, the pair of mounting seats 601, and the cylinder body fixing seat of the small oil cylinder 9;

[0025] The sleeve 5 is used to limit the position of the mounting seat 601 near the large oil cylinder 2. It is configured to cooperate with the screw 3 and sleeved on the corresponding screw 3. The sleeve 5 is located between the cylinder body fixing seat and the mounting seat 601 of the large oil cylinder 2.

[0026] Locking nut 4 is used to adjust the distance between the large oil cylinder 2 and the small oil cylinder 9 in order to adjust the normally closed clamping force. It cooperates with the end of the screw 3 that extends out of the cylinder body fixing seat of the large oil cylinder 2 to fix the cylinder body of the large oil cylinder 2 to the screw 3.

[0027] Preferably, it further includes:

[0028] Locking nut 28 and clamping spring 7 are used to adjust the clamping force of different drill rods. They are set between the cylinder body fixing seat of small oil cylinder 9 and a mounting seat 601 away from small oil cylinder 2.

[0029] The clamping spring 7 is sleeved on the screw 3, and the locking nut 8 is threadedly connected to the screw 3; one end of the clamping spring 7 is in contact with a mounting seat 601 away from the small oil cylinder 2, and the other end is in contact with the locking nut 8.

[0030] An adaptive clamping method includes the following steps:

[0031] To form an open state: the piston rod of the large hydraulic cylinder 2 extends, driving the jacking cylinder to move radially along the drill rod, and the jacking pin pushes the mounting seat 601 in contact with it to move on the corresponding sliding base plate 104 to form an open state;

[0032] To form a clamping state: the piston rod of the small oil cylinder 9 extends, causing a mounting seat 601 away from the large oil cylinder 2 to move on the corresponding sliding base plate 104 to form a clamping state;

[0033] Adjust the clamping force to suit different drill pipes: screw the locking nut 2 8 toward the large hydraulic cylinder 2 to increase the clamping force between the pair of mounting seats 601.

[0034] Compared with the prior art, the advantages of the present invention are:

[0035] (1) Drill rods of different diameters can be clamped directly without changing the slips, and no manual pre-embedding is required.

[0036] (2) The dual floating clamping device enables the clamp to move up and down automatically, which reduces the failure rate and improves maintainability compared to the commonly used hydraulic floating clamping device. Specifically: First, the clamp can float about 104 (radial direction of the drill rod) through the sliding base plate 104 during the drill rod clamping process, which solves the problem of drill rod eccentricity; Second, the clamp can float back and forth through the pin 102 (axial direction of the drill rod) before and after the application of external force, which solves the problem of the clamp being subjected to front and rear push and pull forces. Attached Figure Description

[0037] Figure 1 A perspective view of the adaptive clamping device;

[0038] Figure 2 for Figure 1 A sectional view;

[0039] Figure 3 This is a diagram showing the working state of the adaptive clamping device.

[0040] Figure 4 This is a structural diagram of the adaptive clamping unit;

[0041] Figure 5 Here is a structural diagram of the baffle;

[0042] Figure 6 Diagram showing the adaptive angle adjustment of the adaptive clamping unit;

[0043] Figure 7 This is a structural diagram of the floating base;

[0044] Figure 8 This is a structural diagram of the floating seat;

[0045] Figure 9 This is a top view of the baffle.

[0046] Wherein, 1-floating base, 101-fixed base, 102-pin, 103-floating spring, 104-sliding base plate,

[0047] 2-Large hydraulic cylinder, 3-Screw, 4-Locking nut one, 5-Sleeve, 6-Adaptive clamping unit, 601-Mounting base, 602-Floating base, 6021-First part, 6022-Second part, 603-Clad plate, 604-Baffle, 6041-Fixing part, 6042-End cap, 7-Clamping spring, 8-Locking nut two, 9-Small hydraulic cylinder. Detailed Implementation

[0048] The present invention will now be described in more detail with reference to the accompanying drawings, which illustrate preferred embodiments of the invention. It should be understood that those skilled in the art can modify the invention described herein while still achieving its advantageous effects. Therefore, the following description should be understood as being of general knowledge to those skilled in the art and is not intended to limit the invention.

[0049] like Figures 1-9 An adaptive clamping device, comprising:

[0050] A pair of mounting seats 601 and two pairs of floating seats 602, wherein a clamping space for clamping the drill pipe is formed between the opposing surfaces of the pair of mounting seats 601, and the clamping space extends radially along the drill pipe;

[0051] A pair of mounting seats 601 are spaced apart to form an open state; a pair of mounting seats 601 are close together to form a clamped state; each mounting seat 601 has a pair of floating grooves distributed radially up and down along the drill pipe.

[0052] The floating groove is provided in correspondence with the floating seat 602, and includes an intermediate groove and a side groove that are interconnected.

[0053] The inner wall of the intermediate groove fits into the first part 6021 of the floating seat 602 to adapt to it; the floating seat 602 can rotate along the inner wall of the corresponding intermediate groove; the second part 6022 of the floating seat 602 is fixed to the first part 6021, and an installation groove for installing the slip 603 is opened on its side facing the clamping space; the slip 603 extends radially along the drill rod, and has teeth for contacting the external thread of the drill rod.

[0054] A side groove for mounting baffle 604, which includes a snap-fit ​​for engaging baffle 604; Figure 5 In the middle, the 603 card has a 20° adjustment range.

[0055] The baffle 604 is used to limit the floating seat 602 along the axial direction of the drill rod and restrict the rotation of the floating seat 602. It is arranged corresponding to the floating seat 602, and is fixed to the first part 6021 of the floating seat 602 by a locking member and adapted to the corresponding side groove, and covers the second part 6022 of the floating seat 602.

[0056] Specifically, the baffle 604 includes a fixing part and an end cap. The fixing part is connected to the first part 6021 of the floating seat 602 via fasteners and is adapted to the side groove of the floating groove. The end cap is fixed to the end of the fixing part that extends out of the side groove, and the end cap and the fixing part form a groove that engages with the snap-fit ​​of the side groove. Rotating the end cap causes the first part 6041 of the baffle 604 to rotate within the middle groove of the floating groove. When the snap-fit ​​of the side groove and the groove formed by the end cap and the fixing part are engaged, the baffle 604 stops rotating. Figure 6As shown.

[0057] To achieve a floating shackle, a floating base 1 is further provided to limit the movement of the mounting base 601, including:

[0058] Fixed base 101; it is fixedly set so that it remains fixed when the clamping device is open or clamped.

[0059] The pin 102 is rotatably mounted on the fixed seat 101 along the radial direction of the drill rod;

[0060] The sliding base plate 104 has one end engaged with the through groove of the lower section of the corresponding mounting base 601, allowing the through groove to slide along the corresponding sliding base plate 104 to achieve an open or closed state. The other end of the sliding base plate 104 is engaged with the corresponding pin 102. When the clamping device is open or clamped, it remains fixed on the fixed base 101, but allows the corresponding through groove to move.

[0061] The floating spring 103 is used to allow the mounting base 601 to float along the direction of the drill rod when the drill rod is uncoupled, so as to avoid damaging the external thread of the drill rod. It is sleeved on the corresponding pin 102 and located between the corresponding fixed base 101 and the sliding base plate 104.

[0062] To achieve both opening and clamping, a large hydraulic cylinder 2 and a small hydraulic cylinder 9 are further provided.

[0063] The large hydraulic cylinder 2 is used to separate the two mounting seats 601 to form an open state. Its cylinder body is fixedly installed, and its piston rod extends radially along the drill rod and is fixed to a jacking cylinder. The jacking cylinder is sleeved on its cylinder body. A jacking pin is provided on the end face of the jacking cylinder away from the cylinder body. The jacking pin passes through one of the mounting seats 601 that is close to it and contacts the end face of the other mounting seat 601.

[0064] Small hydraulic cylinder 9 is used to bring the two mounting seats 601 close together to form a clamping state. Its cylinder body is fixedly set, and its piston rod extends radially along the drill rod and is fixed to a mounting seat 601 away from the large hydraulic cylinder 2.

[0065] To achieve guidance and position limitation, screw 3 and sleeve 5 are further provided.

[0066] The screw 3 and sleeve 5 are used to guide a pair of mounting seats 601, which pass sequentially through the cylinder body fixing seat of the large hydraulic cylinder 2, the pair of mounting seats 601, and the cylinder body fixing seat of the small hydraulic cylinder 9. The cylinder body fixing seats are all fixed to their respective cylinder bodies. The cylinder body fixing seats are threadedly connected to the screw 3.

[0067] Sleeve 5 is used to limit the position of the mounting seat 601 near the large oil cylinder 2. It is configured to cooperate with the screw 3 and is sleeved on the corresponding screw 3. Sleeve 5 is located between the cylinder body fixing seat and the mounting seat 601 of the large oil cylinder 2.

[0068] To achieve clamping force adjustment, locking nut 1 (4), locking nut 2 (8), and clamping spring (7) are further provided.

[0069] Locking nut 4 is used to adjust the distance between the large hydraulic cylinder 2 and the small hydraulic cylinder 9 to adjust the normally closed clamping force. It cooperates with the end of the screw 3 that extends out of the cylinder body fixing seat of the large hydraulic cylinder 2 to fix the cylinder body of the large hydraulic cylinder 2 to the screw 3. The small hydraulic cylinder 9 is also fixed to the screw 3 by the locking nut. Specifically, locking nut 4, together with clamping spring 7, is responsible for adjusting the preload of the entire clamp.

[0070] Locking nut 8 and clamping spring 7 are used to adjust the clamping force of drill rods of different diameters. They are positioned between the cylinder body fixing seat of small oil cylinder 9 and a mounting seat 601 away from small oil cylinder 2. Clamping spring 7 is sleeved on screw rod 3, and locking nut 8 is threadedly connected to screw rod 3. One end of clamping spring 7 contacts the mounting seat 601 away from small oil cylinder 2, and the other end contacts locking nut 8. Figure 2 As shown, the spacing is achieved by locking nut 28 and clamping spring 7. l Adjustments.

[0071] Working principle:

[0072] To form the open state: The piston rod of the large hydraulic cylinder 2 extends, driving the jacking cylinder to move radially along the drill rod, and the jacking pin pushes the mounting seat 601 in contact with it to move, so as to form the open state.

[0073] Clamping is achieved: The piston rod of the small hydraulic cylinder 9 extends, causing a mounting seat 601, which is away from the large hydraulic cylinder 2, to move, thus achieving a clamping state. After the slip 603 contacts the drill pipe, the floating seat 602 can begin to rotate during the placement of the drill pipe, adaptively conforming to the drill pipe.

[0074] Adjust the clamping force to suit different drill pipes: screw the locking nut 2 8 toward the large hydraulic cylinder 2 to increase the clamping force between the pair of mounting seats 601.

[0075] The above are merely preferred embodiments of the present invention and do not constitute any limitation on the present invention. Any equivalent substitutions or modifications made by those skilled in the art to the technical solutions and content disclosed in the present invention without departing from the scope of the present invention shall be deemed to have remained within the protection scope of the present invention.

Claims

1. An adaptive clamping device, characterized in that, include: A pair of mounting seats (601) and two pairs of floating seats (602), wherein a clamping space for clamping the drill pipe is formed between the opposing surfaces of the pair of mounting seats (601), the clamping space extending radially along the drill pipe; A pair of mounting seats (601) are far apart to form an open state; when a pair of mounting seats (601) are close together, they form a clamped state; each mounting seat (601) has a pair of floating grooves distributed vertically and vertically along the radial direction of the drill rod; the floating grooves are correspondingly arranged with the floating seats (602) and include an intermediate groove and a side groove that are interconnected. The inner wall of the intermediate groove fits into the first part of the floating seat (602) for adaptation; the floating seat (602) can rotate along the inner wall of the corresponding intermediate groove; the second part of the floating seat (602) is fixed to the first part, and an installation groove for installing a slip (603) is opened on its side facing the clamping space; the slip (603) extends along the axial direction of the drill rod, and has teeth for contacting the external thread of the drill rod. The side groove is used to install the baffle (604), and includes a slot for engaging the baffle (604); A baffle (604) is provided to limit the floating seat (602) along the axial direction of the drill rod and to restrict the rotation of the floating seat (602). It is provided in correspondence with the floating seat (602), and is fixed to the first part of the floating seat (602) by a locking member and adapted to the corresponding side groove, and covers the second part of the floating seat (602).

2. The adaptive clamping device according to claim 1, characterized in that, The baffle (604) includes: The fixing part is connected to the first part of the floating seat (602) by fasteners and is adapted to the side groove of the floating groove; An end cap is fixed to one end of the fixing part that extends out of the side groove, and the end cap and the fixing part form a groove that engages with the side groove. Rotate the end cover to drive the fixed part of the baffle (604) to rotate in the middle groove of the floating groove. When the snap-fit ​​of the side groove matches the snap-fit ​​groove, the baffle (604) stops rotating.

3. The adaptive clamping device according to claim 1, characterized in that, Also includes: A floating base (1) for limiting the mounting base (601), comprising: Fixture (101); A pin (102) is rotatably mounted on a fixed seat (101) along the radial direction of the drill rod; The sliding base plate (104) engages with the through groove of the lower section of the corresponding mounting base (601) at one end, and the through groove can slide along the corresponding sliding base plate (104) to achieve an open or closed state. The other end of the sliding base plate (104) is engaged with the corresponding pin (102). A floating spring (103) is used to allow the mounting base (601) to float along the direction of the drill rod when the drill rod is uncoupled, so as to avoid damaging the external thread of the drill rod. It is sleeved on the corresponding pin (102) and located between the corresponding fixed base (101) and the sliding base plate (104).

4. The adaptive clamping device according to claim 1, characterized in that, Also includes: A large hydraulic cylinder (2) is used to separate two mounting seats (601) to form an open state. Its cylinder body is fixedly installed, and its piston rod extends radially along the drill rod and is fixed to a jacking cylinder. The jacking cylinder is sleeved on its cylinder body. A jacking pin is provided on the end face of the jacking cylinder away from the cylinder body. The jacking pin passes through one of the mounting seats (601) that is close to it and contacts the end face of the other mounting seat (601). Small cylinder (9) is used to bring two mounting seats (601) close together to form a clamping state. Its cylinder body is fixedly set, and its piston rod extends radially along the drill rod and is fixed to a mounting seat (601) away from the large cylinder (2).

5. The adaptive clamping device according to claim 4, characterized in that, Also includes: Screw (3) and sleeve (5), the screw (3) is used to guide a pair of mounting seats (601) which pass through the cylinder body fixing seat of the large cylinder (2), the pair of mounting seats (601) and the cylinder body fixing seat of the small cylinder (9) in sequence; The sleeve (5) is used to define the position of the mounting seat (601) near the large oil cylinder (2). It is configured to cooperate with the screw (3) and sleeved on the corresponding screw (3). The sleeve (5) is located between the cylinder body fixing seat and the mounting seat (601) of the large oil cylinder (2). Locking nut 1 (4) is used to adjust the distance between the large oil cylinder (2) and the small oil cylinder (9) to adjust the normally closed clamping force. It cooperates with the end of the screw (3) that extends out of the cylinder body fixing seat of the large oil cylinder (2) to fix the cylinder body of the large oil cylinder (2) to the screw (3).

6. The adaptive clamping device according to claim 5, characterized in that, Also includes: Locking nut 2 (8) and clamping spring (7) are used to adjust the clamping force of different drill rods. They are set between the cylinder body fixing seat of the small oil cylinder (9) and a mounting seat (601) away from the large oil cylinder (2). The clamping spring (7) is sleeved on the screw (3), and the locking nut (8) is threadedly connected to the screw (3); one end of the clamping spring (7) is in contact with a mounting seat (601) away from the large oil cylinder (2), and the other end is in contact with the locking nut (8).

7. An adaptive clamping method, characterized in that, Includes the following steps: Forming an open state: The piston rod of the large oil cylinder (2) extends, driving the jacking cylinder to move radially along the drill rod, and the jacking pin pushes the mounting seat (601) in contact with it to move on the corresponding sliding base plate (104), and a pair of mounting seats (601) move away from each other to form an open state; Forming a clamping state: The piston rod of the small oil cylinder (9) extends, driving a mounting seat (601) away from the large oil cylinder (2) to move on the corresponding sliding base plate (104). The pair of mounting seats (601) approach each other. After the slip plate (603) contacts the drill rod, the floating seat (602) rotates along the inner wall of the middle groove and drives the slip plate (603) to adaptively fit the outer surface of drill rods of different diameters to form a clamping state. Adjust the clamping force to adapt to different drill pipes: Screw the locking nut 2 (8) sleeved on the screw (3) in the direction of the large oil cylinder (2), compress the clamping spring (7) located between the locking nut 2 (8) and the mounting seat (601) away from the large oil cylinder (2), and increase the clamping force between the pair of mounting seats (601) by the change of the elastic force of the clamping spring (7). After adjustment, it can adapt to the clamping requirements of drill pipes of different diameters without replacing the slips (603).

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