A hydraulic clamp for wireline coring drill pipe

Abstract

This application relates to a hydraulic clamp for wireline coring drill pipes, belonging to the field of mechanical hydraulic technology. It includes a housing, a drive mechanism, a transmission mechanism, and a clamping mechanism. The drive mechanism is fixedly disposed within the housing, and the transmission mechanism is driven within the housing. The drive mechanism is drively connected to the transmission mechanism, and the clamping mechanism is drively connected to the transmission mechanism. The drive mechanism, fixed within the housing, provides a power source. The transmission mechanism transmits the power from the drive mechanism to the clamping mechanism, enabling the clamping mechanism to perform clamping actions. Throughout the process, the drive mechanism controls the opening and closing of the clamping mechanism through the transmission mechanism, achieving the clamping and release of the drill pipe. The integrated design of this device makes the hydraulic clamp compact and the power transmission highly efficient, improving the automation and reliability of wireline coring operations. The housing protects the internal mechanisms from external environmental interference, extending its service life.

Description

Technical Field

[0001] This application relates to the field of mechanical hydraulic technology, and in particular to a hydraulic clamp for wireline coring drill rods. Background Technology

[0002] In the field of wireline coring drilling, drill pipe coupling and uncoupling is a crucial and frequent operation. With the continuous development of drilling technology, the requirements for the efficiency, stability, and safety of drill pipe coupling and uncoupling operations are also increasing. Efficient, stable, and safe coupling and uncoupling operations can significantly improve the overall progress of drilling work, reduce labor and material costs, and are of great significance for ensuring the smooth progress of drilling projects. Traditional wireline coring drill pipe coupling and uncoupling operations rely on various equipment or operating methods, but some equipment lacks reliable braking and limiting structures. In terms of maintenance, core control components such as braking and steering are mostly hidden inside the equipment, requiring disassembly of the equipment casing for inspection or repair, which is cumbersome. Furthermore, the assembly and disassembly structures of clamping components are complex, and replacing worn parts requires a significant amount of time, posing safety hazards to operators. In addition, poor maintenance convenience and time-consuming troubleshooting seriously affect the overall operation progress.

[0003] Therefore, in view of the above situation, there is an urgent need to develop a hydraulic clamp for wireline coring drill pipes to overcome the shortcomings in current practical applications. Utility Model Content

[0004] To address the deficiencies in the aforementioned technology, this application provides a hydraulic clamp for wireline coring drill pipes.

[0005] This application provides a hydraulic clamp for wireline coring drill pipes, which adopts the following technical solution: A hydraulic clamp for wireline coring drill pipe includes a housing, a drive mechanism, a transmission mechanism, and a clamping mechanism. The drive mechanism is fixedly disposed within the housing, the transmission mechanism is tractively disposed within the housing, the drive mechanism is tractively connected to the transmission mechanism, and the clamping mechanism is tractively connected to the transmission mechanism.

[0006] Beneficial effects: The integrated design of this device makes the hydraulic clamp compact and the power transmission efficient, which improves the automation and reliability of rope coring operations. The shell protects the internal mechanism from external environmental interference, extends its service life, avoids safety hazards to operators, improves maintenance convenience, reduces troubleshooting time, and improves the overall operation progress.

[0007] In one optional embodiment, the driving mechanism includes a placement cavity, in which a fixed frame is horizontally arranged. The upper and lower ends of the fixed frame are respectively fixedly connected to the inner wall of the placement cavity via support columns. The fixed frame has a placement groove and a sliding groove. A hydraulic rod is fixedly arranged in the placement groove. The telescopic ends of the hydraulic rod are respectively fixedly connected to a first rod and a second rod. The first rod and the second rod are arranged parallel to each other. The other ends of the first rod and the second rod are respectively fixedly connected to a slider. The slider is slidably arranged in the sliding groove. A hinge plate is fixedly arranged at the other end of the fixed frame. The transmission mechanism is hingedly arranged on the slider and the sliding groove.

[0008] Beneficial effects: The use of hydraulic rods and linkage mechanisms provides a stable and adjustable driving force, ensuring smooth and precise clamping action. The fixed frame and support column enhance structural rigidity, reduce vibration and energy loss, and improve the response speed and load capacity of the hydraulic clamps.

[0009] In one optional embodiment, the transmission mechanism consists of two sets, which are symmetrically arranged on the upper and lower sides of the fixed frame and the hinge plate, respectively.

[0010] Beneficial effects: The symmetrical design avoids skewing or jamming caused by uneven force on one side, and improves the balance and stability of clamping. This helps prevent the drill pipe from deforming or being damaged during clamping, thus improving operational safety.

[0011] In one optional embodiment, the transmission mechanism includes arc rods, two arc rods are symmetrically hinged to the top of the slider, two L-shaped rods are symmetrically hinged to the top two sides of the hinge plate, the other end of the corresponding arc rod is hinged to the right angle of the L-shaped rod, two straight rods are symmetrically hinged to the top end of the hinge plate away from the hydraulic rod, and the other end of the L-shaped rod and the straight rod are respectively hinged to the clamping mechanism.

[0012] Beneficial effects: The combination of the arc bar and the L-shaped bar provides mechanical leverage, increases the clamping force, and makes the movement smoother. This transmission mechanism can adapt to drill pipes of different sizes, improving the adaptability and flexibility of the hydraulic tongs.

[0013] In one optional embodiment, the clamping mechanism includes a left clamping member and a right clamping member. The left clamping member is hinged to the other end of the L-shaped rod and the other end of the straight rod on the corresponding side. The right clamping member is hinged to the other end of the L-shaped rod and the other end of the straight rod on the corresponding side. The left clamping member has a clamping groove, and an arc clamp is inserted into the clamping groove. A telescopic member is provided on the outer wall of the left clamping member. The telescopic end of the telescopic member is inserted into the clamping groove and fixedly connected to the outer side of the arc clamp. A rotating assembly is rotatably provided on the top of the left clamping member and the right clamping member.

[0014] Beneficial effects: The design of the arc clamp and telescopic component allows the hydraulic clamp to hold drill pipes of different diameters, improving versatility. The independent operation of the left and right clamps ensures tight clamping and reduces the risk of slippage. The rotating component further enhances the operational functionality.

[0015] In one optional embodiment, the left clamping member and the right clamping member are both semicircular, and the structure inside the right clamping member is the same as the structure inside the left clamping member.

[0016] Beneficial effects: The semi-circular design ensures that the clamping force is evenly distributed across the entire circumference of the drill pipe, avoiding stress concentration caused by point contact and reducing surface damage. The identical structure simplifies manufacturing and maintenance, reducing costs.

[0017] In one optional embodiment, the rotating assembly includes rotating clamps. The tops of the left and right clamps are respectively provided with rotating grooves. The two semi-circular rotating clamps are rotatably disposed within the rotating grooves. Multiple movable balls are rotatably disposed within the bottom of each rotating clamp. Limiting grooves are provided on the sidewalls of the rotating grooves. Limiting arc clips are provided on the inner and outer sides of the bottom of each rotating clamp, and these limiting arc clips are respectively inserted into the limiting grooves. Gaskets are provided on the inner sides of each rotating clamp. Toothed patterns are provided on the outer sides of both rotating clamps. A driving assembly is fixedly disposed on the outer wall of the right clamp, and the driving assembly engages with the toothed patterns on the outer side of the rotating clamp for transmission.

[0018] Beneficial effects: The rotating assembly rotates while the drill pipe is clamped, making it easy to adjust the position or perform tightening or loosening operations. The moving ball and the limiting arc ensure smooth and reliable rotation, and the shims increase friction to prevent slippage and improve work efficiency.

[0019] In one optional embodiment, the drive assembly includes a drive housing, which is fixedly disposed on the outer wall of the right clamping member. A drive component is fixedly disposed on the top of the drive housing, and the drive end of the drive component is inserted into the drive housing. A drive gear is disposed on the drive end of the drive component. A rotating shaft is vertically disposed inside the drive housing, and a driven gear is fixedly disposed on the rotating shaft. The drive gear meshes with the driven gear for transmission, and the driven gear meshes with the toothed teeth disposed on the outer sides of the two rotating clamps for transmission.

[0020] Beneficial effects: Gear transmission provides efficient and precise power delivery, and the drive components are integrated into the gripper, resulting in a compact structure. This design allows for remote control of rotational motion, reducing manual intervention and improving ease of operation and safety.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. The drive mechanism (such as a hydraulic system) is fixed inside the housing and provides the power source; the transmission mechanism transmits the power from the drive mechanism to the clamping mechanism, enabling the clamping mechanism to perform clamping actions. Throughout the process, the drive mechanism controls the opening and closing of the clamping mechanism through the transmission mechanism to achieve the clamping and release of the drill pipe. The integrated design of this device makes the hydraulic clamp compact and the power transmission efficient, improving the automation and reliability of wireline coring operations. The housing protects the internal mechanism from external environmental interference, extends its service life, avoids safety hazards to operators, improves maintenance convenience, reduces troubleshooting time, and improves the overall operation progress. 2. The combination design of the arc bar and L-shaped bar provides mechanical leverage, increases the clamping force, and makes the movement smoother. This transmission mechanism can adapt to drill pipes of different sizes, improving the adaptability and flexibility of the hydraulic tongs. 3. The rotating assembly rotates while the drill pipe is clamped, making it easy to adjust the position or perform tightening or loosening operations. The moving ball and the limiting arc ensure smooth and reliable rotation, and the shims increase friction to prevent slippage and improve work efficiency. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure provided in the embodiments of this application; Figure 2 This is a schematic diagram of the overall cross-sectional structure provided in the embodiments of this application; Figure 3 This is a schematic cross-sectional view of the driving component provided in an embodiment of this application; Figure 4 yes Figure 3 A magnified view of a portion of point A in the middle.

[0023] Explanation of reference numerals in the attached drawings: 1. Housing; 11. Placement cavity; 2. Drive mechanism; 21. Fixing frame; 211. Slide groove; 22. Support column; 23. Hydraulic rod; 24. First rod; 25. Second rod; 26. Slider; 27. Hinge plate; 3. Transmission mechanism; 31. Arc rod; 32. L-shaped rod; 33. Straight rod; 4. Clamping mechanism; 41. Left clamping part; 411. Clamping groove; 412. Arc clamp; 42. Right clamping part; 43. Telescopic part; 44. Rotating assembly; 441. Rotating clamp; 442. Rotating groove; 443. Moving ball; 444. Limiting groove; 445. Limiting arc clamp; 446. Gasket; 447. Tooth pattern; 45. Drive assembly; 451. Drive box; 452. Drive component; 453. Driving gear; 454. Rotating shaft; 455. Driven gear. Detailed Implementation

[0024] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0025] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0027] Furthermore, the technical features involved in the different embodiments of this application described below can be combined with each other as long as they do not conflict with each other.

[0028] The present invention provides the following embodiments: Example 1

[0029] This application discloses a hydraulic clamp for wireline coring drill pipes, as described in the embodiments below. Figure 1 It includes a housing 1, a drive mechanism 2, a transmission mechanism 3, and a clamping mechanism 4. The drive mechanism 2 is fixedly disposed inside the housing 1, the transmission mechanism 3 is tractively disposed inside the housing 1, the drive mechanism 2 is tractively connected to the transmission mechanism 3, and the clamping mechanism 4 is tractively connected to the transmission mechanism 3.

[0030] The working principle and beneficial effects of the above technical solution are as follows: the drive mechanism 2 (such as a hydraulic system) is fixed inside the housing 1 to provide a power source; the transmission mechanism 3 transmits the power of the drive mechanism 2 to the clamping mechanism 4, enabling the clamping mechanism 4 to perform clamping actions. Throughout the process, the drive mechanism 2 controls the opening and closing of the clamping mechanism 4 through the transmission mechanism 3 to achieve the clamping and release of the drill rod.

[0031] The integrated design of this device makes the hydraulic clamp compact and the power transmission efficient, improving the automation and reliability of rope coring operations. The housing 1 protects the internal mechanism from external environmental interference, extends its service life, avoids safety hazards to operators, improves maintenance convenience, reduces troubleshooting time, and improves the overall operation progress.

[0032] like Figures 1-2 As shown, the driving mechanism 2 includes a placement cavity 11, in which a fixed frame 21 is horizontally arranged. The upper and lower ends of the fixed frame 21 are fixedly connected to the inner wall of the placement cavity 11 by support columns 22. The fixed frame 21 has a placement groove and a sliding groove 211. A hydraulic rod 23 is fixedly arranged in the placement groove. The telescopic ends of the hydraulic rod 23 are fixedly connected to a first rod 24 and a second rod 25, respectively. The first rod 24 and the second rod 25 are arranged parallel to each other. The other ends of the first rod 24 and the second rod 25 are fixedly connected to a slider 26, which is slidably arranged in the sliding groove 211. A hinge plate 27 is fixedly arranged at the other end of the fixed frame 21. The transmission mechanism 3 is hingedly arranged on the slider 26 and the sliding groove 211.

[0033] The working principle and beneficial effects of the above technical solution are as follows: the hydraulic rod 23 serves as a power source, and its telescopic end pushes the first rod 24 and the second rod 25, causing the slider 26 to slide in the groove 211 of the fixed frame 21. The movement of the slider 26 drives the transmission mechanism 3 through the hinge point, thereby converting the linear motion into the motion required by the clamping mechanism 4.

[0034] The hydraulic rod 23 and linkage mechanism provide a stable and adjustable driving force, ensuring smooth and precise clamping action. The fixed frame 21 and support column 22 enhance structural rigidity, reduce vibration and energy loss, and improve the response speed and load capacity of the hydraulic clamp.

[0035] like Figures 1-2 As shown, the transmission mechanism 3 consists of two sets, which are symmetrically arranged on the upper and lower sides of the fixed frame 21 and the hinge plate 27, respectively.

[0036] The working principle and beneficial effects of the above technical solution are as follows: two sets of transmission mechanisms 3 are symmetrically arranged on the upper and lower sides of the fixed frame 21 and the hinge plate 27. When the drive mechanism 2 works, the two sets of transmission mechanisms 3 move synchronously and jointly drive the clamping mechanism 4, so that the clamping force is evenly distributed.

[0037] The symmetrical design avoids skewing or jamming caused by uneven force on one side, improving the balance and stability of the clamping process. This helps prevent the drill pipe from deforming or being damaged during clamping, thus enhancing operational safety.

[0038] like Figures 1-2 As shown, the transmission mechanism 3 includes an arc rod 31, two arc rods 31 are symmetrically hinged to the top of the slider 26, two L-shaped rods 32 are symmetrically hinged to the top two sides of the hinge plate 27, the other end of the corresponding arc rod 31 is hinged to the right angle of the L-shaped rod 32, and two straight rods 33 are symmetrically hinged to the top of the hinge plate 27 away from the hydraulic rod 23. The other ends of the L-shaped rod 32 and the straight rod 33 are respectively hinged to the clamping mechanism 4.

[0039] The working principle and beneficial effects of the above technical solution are as follows: When the slider 26 moves, it drives the arc rod 31 to swing. The arc rod 31 is hinged to the L-shaped rod 32 at a right angle, which pushes the L-shaped rod 32 and the straight rod 33 to move. The other end of the L-shaped rod 32 and the straight rod 33 is hinged to the clamping mechanism 4, thereby converting the linear motion of the slider 26 into the opening and closing action of the clamping mechanism 4.

[0040] The combined design of the arc rod 31 and the L-shaped rod 32 provides a mechanical lever effect, increasing the clamping force and making the movement smoother. This transmission mechanism 3 can accommodate drill pipes of different sizes, improving the adaptability and flexibility of the hydraulic tongs.

[0041] like Figures 1-2 As shown, the clamping mechanism 4 includes a left clamping member 41 and a right clamping member 42. The left clamping member 41 is hinged to the other end of the L-shaped rod 32 and the other end of the straight rod 33 on the corresponding side. The right clamping member 42 is hinged to the other end of the L-shaped rod 32 and the other end of the straight rod 33 on the corresponding side. A clamping groove 411 is provided in the left clamping member 41, and an arc clamp 412 is inserted into the clamping groove 411. A telescopic member 43 is provided on the outer wall of the left clamping member 41. The telescopic end of the telescopic member 43 is inserted into the clamping groove 411 and is fixedly connected to the outer side of the arc clamp 412. A rotating assembly 44 is rotatably provided on the top of the left clamping member 41 and the right clamping member 42.

[0042] The working principle and beneficial effects of the above technical solution are as follows: the left clamping member 41 and the right clamping member 42 are driven by the transmission mechanism 3 through the hinge point to achieve synchronous opening and closing. The arc clamp 412 in the clamping groove 411 is controlled by the telescopic member 43 and the clamping position can be adjusted. When the telescopic member 43 extends or retracts, the arc clamp 412 moves in the clamping groove 411 to adapt to the shape of the drill rod.

[0043] The design of the arc clamp 412 and the telescopic component 43 allows the hydraulic clamp to hold drill pipes of different diameters, improving versatility. The independent action of the left clamp 41 and the right clamp 42 ensures tight clamping and reduces the risk of slippage. The rotating component 44 further enhances the operational functionality.

[0044] like Figures 1-2 As shown, the left clamping member 41 and the right clamping member 42 are both semicircular, and the structure inside the right clamping member 42 is the same as the structure inside the left clamping member 41.

[0045] The working principle and beneficial effects of the above technical solution are as follows: both the left clamping component 41 and the right clamping component 42 are semi-circular structures, and the internal components (such as the arc clamp 412 and the telescopic component 43) are symmetrically arranged. When the clamping mechanism 4 is closed, the two semi-circular components form a complete circular clamping surface that surrounds the drill rod.

[0046] The semi-circular design ensures that the clamping force is evenly distributed across the entire circumference of the drill pipe, avoiding stress concentration caused by point contact and reducing surface damage. The consistent structure simplifies manufacturing and maintenance, reducing costs.

[0047] like Figures 1-2 As shown, the rotating assembly 44 includes a rotating clamp 441. The tops of the left clamp 41 and the right clamp 42 are respectively provided with rotating grooves 442. The two semi-circular rotating clamps 441 are rotatably disposed in the rotating grooves 442. Multiple movable balls 443 are rotatably disposed in the bottom of the rotating clamps 441. Limiting grooves 444 are provided on the side walls of the rotating grooves 442. Limiting arc clips 445 are provided on the inner and outer sides of the bottom of the rotating clamps 441. The limiting arc clips 445 are respectively inserted into the limiting grooves 444. Gaskets 446 are respectively provided on the inner side of the rotating clamps 441. Teeth 447 are respectively provided on the outer sides of the two rotating clamps 441. A driving assembly 45 is fixedly provided on the outer wall of the right clamp 42. The driving assembly 45 engages with the teeth 447 on the outer side of the rotating clamps 441 for transmission.

[0048] The working principle and beneficial effects of the above technical solution are as follows: The rotary clamp 441 is installed on the top of the left clamping member 41 and the right clamping member 42 through the rotary groove 442. When the left clamping member 41 and the right clamping member 42 are closed, the telescopic member 43 controls the arc clamp 412 in the clamping groove 411 to retract and not clamp the rotating drill rod. The two rotary clamps 441 can clamp the drill rod and rotate freely in the rotary groove 442. The moving ball 443 reduces friction at the bottom of the rotary clamp 441. The limiting arc clamp 445 prevents rotation and disengagement in the limiting groove 444. The drive component 45 drives the rotary clamp 441 to rotate through the meshing of the toothed thread 447, thereby driving the drill rod to rotate.

[0049] The rotating assembly 44 rotates while the drill pipe is clamped, making it easy to adjust the position or perform tightening or loosening operations. The moving ball 443 and the limiting arc 445 ensure smooth and reliable rotation, while the shim 446 increases friction, prevents slippage, and improves work efficiency.

[0050] like Figures 1-2 As shown, the drive assembly 45 includes a drive housing 451, which is fixedly mounted on the outer wall of the right clamping member 42. A drive member 452 is fixedly mounted on the top of the drive housing 451. The drive end of the drive member 452 is inserted into the drive housing 451. A drive gear 453 is provided at the drive end of the drive member 452. A rotating shaft 454 is vertically mounted inside the drive housing 451. A driven gear 455 is fixedly mounted on the rotating shaft 454. The drive gear 453 meshes with the driven gear 455 for transmission. The driven gear 455 meshes with the teeth 447 respectively provided on the outer sides of the two rotating clamps 441 for transmission.

[0051] The working principle and beneficial effects of the above technical solution are as follows: the driving component 452 (such as a motor) drives the driving gear 453, the driving gear 453 meshes with the driven gear 455, the driven gear 455 is fixed on the rotating shaft 454 and meshes with the toothed teeth 447 on the outside of the rotating clamp 441, thereby transmitting power to the rotating clamp 441 and causing it to rotate.

[0052] Gear drive provides efficient and precise power transmission. The drive component 45 is integrated into the gripper, which is compact in structure. This design allows for remote control of rotational motion, reduces manual intervention, and improves ease of operation and safety.

[0053] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this application.

Claims

1. A wire-line core drill rod hydraulic tong, characterized by: The device includes a housing (1), a drive mechanism (2), a transmission mechanism (3), and a clamping mechanism (4). The drive mechanism (2) is fixedly disposed inside the housing (1), and the transmission mechanism (3) is drivenly disposed inside the housing (1). The drive mechanism (2) is drivenly connected to the transmission mechanism (3), and the clamping mechanism (4) is drivenly connected to the transmission mechanism (3). The clamping mechanism (4) includes a left clamping member (41) and a right clamping member (42). The left clamping member (41) and the right clamping member (42) are respectively drivenly connected to the transmission mechanism (3). A rotating assembly (44) is rotatably disposed on the top of the left clamping member (41) and the right clamping member (42). A drive assembly (45) is fixedly disposed on the outer wall of the right clamping member (42). The driving component (45) is connected to the rotating component (44) in a transmission manner. The driving component (45) includes a driving box (451). The driving box (451) is fixedly installed on the outer wall of the right clamping member (42). A driving member (452) is fixedly installed on the top of the driving box (451). The driving end of the driving member (452) is inserted into the driving box (451). A driving gear (453) is provided on the driving end of the driving member (452). A rotating shaft (454) is vertically installed inside the driving box (451). A driven gear (455) is fixedly installed on the rotating shaft (454). The driving gear (453) meshes with the driven gear (455) in a transmission manner. The driven gear (455) is connected to the rotating component (44) in a transmission manner.

2. The hydraulic clamp for wireline coring drill pipe according to claim 1, characterized in that: The driving mechanism (2) includes a placement cavity (11), in which a fixed frame (21) is horizontally arranged. The upper and lower ends of the fixed frame (21) are fixedly connected to the inner wall of the placement cavity (11) through support columns (22). The fixed frame (21) has a placement groove and a sliding groove (211). A hydraulic rod (23) is fixedly arranged in the placement groove. The telescopic ends of the hydraulic rod (23) are fixedly connected to a first rod (24) and a second rod (25) respectively. The first rod (24) and the second rod (25) are arranged in parallel. The other ends of the first rod (24) and the second rod (25) are fixedly connected to a slider (26) respectively. The slider (26) is slidably arranged in the sliding groove (211). A hinge plate (27) is fixedly arranged at the other end of the fixed frame (21). The transmission mechanism (3) is hinged on the slider (26) and the sliding groove (211).

3. The hydraulic clamp for wireline coring drill pipe according to claim 2, characterized in that: The transmission mechanism (3) consists of two sets, which are symmetrically arranged on the upper and lower sides of the fixed frame (21) and the hinge plate (27).

4. The hydraulic clamp for wireline coring drill pipe according to claim 3, characterized in that: The transmission mechanism (3) includes an arc rod (31), two arc rods (31) are symmetrically hinged to the top of the slider (26), two L-shaped rods (32) are symmetrically hinged to the top two sides of the hinge plate (27), the other end of the corresponding arc rod (31) is hinged to the right angle of the L-shaped rod (32), two straight rods (33) are symmetrically hinged to the top of the hinge plate (27) away from the hydraulic rod (23), and the other ends of the L-shaped rod (32) and the straight rod (33) are respectively hinged to the clamping mechanism (4).

5. A hydraulic clamp for wireline coring drill pipe according to claim 4, characterized in that: The left clamping member (41) is hinged to the other end of the L-shaped rod (32) and the other end of the straight rod (33) on the corresponding side. The right clamping member (42) is hinged to the other end of the L-shaped rod (32) and the other end of the straight rod (33) on the corresponding side. A clamping groove (411) is provided in the left clamping member (411). An arc clamp (412) is inserted in the clamping groove (411). A telescopic member (43) is provided on the outer wall of the left clamping member (41). The telescopic end of the telescopic member (43) is inserted into the clamping groove (411). The telescopic end of the telescopic member (43) is fixedly connected to the outside of the arc clamp (412).

6. A hydraulic clamp for wireline coring drill pipe according to claim 5, characterized in that: The left clamp (41) and the right clamp (42) are both semicircular, and the structure inside the right clamp (42) is the same as the structure inside the left clamp (41).

7. A hydraulic clamp for wireline coring drill pipe according to claim 5, characterized in that: The rotating assembly (44) includes a rotating clamp (441). The tops of the left clamp (41) and the right clamp (42) are respectively provided with rotating grooves (442). The two semi-circular rotating clamps (441) are rotatably disposed in the rotating grooves (442). Multiple movable balls (443) are rotatably disposed in the bottom of the rotating clamps (441). Limiting grooves (444) are provided on the side walls of the rotating grooves (442). Limiting grooves are provided on the inner and outer sides of the bottom of the rotating clamps (441). Arc clips (445) are respectively inserted into the limiting grooves (444). Gaskets (446) are respectively provided on the inner side of the rotating clamps (441). Teeth (447) are respectively provided on the outer side of the two rotating clamps (441). The driving component (45) meshes with the teeth (447) on the outer side of the rotating clamps (441) for transmission. The driven gear (455) meshes with the teeth (447) respectively provided on the outer side of the two rotating clamps (441).

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