Overload lifting protection device for rope coring winch

Abstract

The utility model discloses an overload lifting protection device for a rope coring winch, which relates to the technical field of rope coring winches and comprises a fixed bottom plate, a support is fixedly connected to the upper end of the fixed bottom plate, a winch driving device is mounted on the support, a winding drum is mounted at the left end of the winch driving device, and a steel wire rope body is wound on the winding drum. The wire rope coring winch overload lifting protection device comprises a fixed bottom plate and a winding drum, a transmission device is installed at the left end of the winding drum, a fixed plate is fixedly connected to the upper end of the fixed bottom plate, and a rope arrangement guiding mechanism is arranged between the fixed plate and the transmission device. When the winch driving device drives the winding drum to continuously pull the steel wire rope body to ascend, after the tension detection mechanism detects that the tension reaches the overload set force value of the steel wire rope body, an alarm is given in time, work of the winch driving device is stopped, breakage of the steel wire rope body caused by continuous pulling is avoided, and the protection effect is enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of rope coring winches, in particular to an overload lifting protection device for rope coring winches. Background Art

[0002] In the deep hole drilling process of geological drilling, rope coring is mostly used to lift the coring drill to the ground to retrieve the core. The rope coring winch is specially used to drive the coring drill to rise to retrieve the core. Generally, the wire rope on the rope coring winch is connected to the salvage device, and then the motor in the rope coring winch is used to drive the drum to rotate, and the rolling lifting is used to pull the wire rope to reel in, thereby driving the inner core tube and the core to be lifted upward and taken out.

[0003] At present, in the process of the rope coring winch pulling the steel wire rope to drive the inner core tube and the core to lift upward, due to the narrow interior of the borehole, the inner core tube is easily stuck with the inner wall of the borehole during the upward lifting process. The rope coring winch continues to work and continues to forcibly pull the steel wire rope, causing it to withstand a tensile force exceeding its tolerance and break, thereby affecting the normal progress of the rope coring work and having a poor use effect. Therefore, there is an urgent need to improve the technology of the rope coring winch to improve this equipment.

[0004] To this end, the utility model proposes an overload lifting protection device for a rope coring winch. Summary of the invention

[0005] In order to solve the above technical problems, the utility model provides an overload lifting protection device for a rope coring winch, which can realize that after the inner core tube connected to the wire rope body is stuck with the inner wall of the borehole, when the winch driving device drives the drum to continue to pull the wire rope body upward, the tension detection mechanism detects that the tension reaches the overload setting force value of the wire rope body, and then promptly alarms and stops the operation of the winch driving device to avoid continued pulling that may cause the wire rope body to break, thereby enhancing the protection effect.

[0006] To achieve the above purpose, the utility model provides the following solutions:

[0007] The utility model provides an overload lifting protection device for a rope coring winch, comprising a fixed base plate, a bracket, a winch driving device, a drum, a steel wire rope body, a fixed plate, a transmission device, a rope-laying guide mechanism, a tension detection mechanism and a feedback clamping mechanism; the bracket is arranged on one side of the top surface of the fixed base plate, and the transmission device is arranged on the other side of the top surface of the fixed base plate; the winch driving device is arranged on the bracket, one end of the drum is transmission-connected to the winch driving device, and the other end of the drum is transmission-connected to the transmission device, the rope-laying guide mechanism is arranged between the transmission device and the bracket, and the rope-laying guide mechanism is transmission-connected to the transmission device; one end of the steel wire rope body is wound around the drum, and the other end of the steel wire rope body is connected to the tension sensor in the tension detection mechanism after passing through the rope-laying guide mechanism, the feedback clamping mechanism is arranged on the bracket, the feedback clamping mechanism is used to stop the drum from rotating, and the tension detection mechanism is electrically connected to the winch driving device and the feedback clamping mechanism respectively.

[0008] Optionally, the rope guiding mechanism includes a threaded rod, a threaded moving block, a guide roller, a sliding block, a guide rod and a sliding rod; the end of the threaded rod is transmission-connected to the output end of the transmission device, and the threaded moving block is arranged on the threaded rod and transmission-connected to the threaded rod; two guide rollers are arranged on the lower part of one side of the sliding block, and two guide rods are arranged on the upper part of one side of the sliding block; the sliding rod is arranged between the bracket and the transmission device, and a through guide hole is arranged on the sliding rod, and the sliding rod passes through the through guide hole; the other end of the wire rope body passes through the gap between the two guide rollers and then passes through the gap between the two guide rods.

[0009] Optionally, two straight plates are provided at a lower portion of one side of the sliding block, and the two guide rollers are provided between the two straight plates.

[0010] Optionally, the tension detection mechanism includes a tension sensor, a torsion plate, a first positioning pulley, a second positioning pulley, a connecting plate and a detection controller; the first positioning pulley is arranged above one side of the torsion plate, and the second positioning pulley is arranged below one side of the torsion plate; the middle part of the other side of the torsion plate is rotatably connected to one end of the connecting plate, and the other end of the connecting plate is connected to the fixed plate, and the tension sensor is arranged between the upper part of the other side of the torsion plate and the middle part of the connecting plate; the wire rope body passes through the space between the second positioning pulley and the first positioning pulley; the detection controller is electrically connected to the tension sensor; the detection controller is electrically connected to the winch drive device and the feedback clamping mechanism respectively.

[0011] Optionally, the detection controller is provided with operation buttons and a display panel;

[0012] Optionally, an audible and visual alarm is provided on the housing of the transmission device, and the audible and visual alarm is electrically connected to the detection controller.

[0013] Optionally, the feedback clamping mechanism includes a connecting frame, a bidirectional electric telescopic rod, a connecting straight plate and a clamping plate; one end of the connecting frame is connected to the bracket, and the bidirectional electric telescopic rod is arranged below the other end of the connecting frame, and the two free ends of the bidirectional electric telescopic rod are respectively arranged to be connected to one end of the connecting straight plate, and the other end of the connecting straight plate is provided with the clamping plate; the two clamping plates are located on both sides of the reel.

[0014] Optionally, anti-slip grooves are provided on the inner wall of the splint.

[0015] Compared with the prior art, the utility model has achieved the following technical effects:

[0016] The overload lifting protection device for the rope coring winch in the utility model can guide the winch drive device and the drum when the wire rope body is lifted or lowered through the rope guiding mechanism, so that it can be lifted or lowered stably and orderly, and it is not easy to be tangled, thereby improving the operational stability. After the inner core tube connected to the wire rope body is stuck with the inner wall of the borehole, when the winch drive device drives the drum to continue to pull the wire rope body up, after the tension detection mechanism detects that the tension reaches the overload setting force value of the wire rope body, it will alarm in time and stop the work of the winch drive device to avoid continued pulling and causing the wire rope body to break, thereby enhancing the protective effect. After the tension detection mechanism alarms, the feedback clamping stop mechanism can clamp the drum in time to keep it fixed, thereby avoiding the phenomenon that the wire rope body is overloaded and broken due to the continued rotation of the winch drive device due to the inertia, thereby further enhancing the protective effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the overload lifting protection device of the rope coring winch in the utility model;

[0019] Figure 2 It is a structural schematic diagram of the rope guiding mechanism of the overload lifting protection device of the rope coring winch in the utility model;

[0020] Figure 3It is a partial cross-sectional structural schematic diagram of the tension detection mechanism of the overload lifting protection device of the rope coring winch in the utility model;

[0021] Figure 4 The utility model is a schematic diagram of the structure of the feedback clamping stop mechanism of the overload lifting protection device of the rope coring winch.

[0022] Description of the numbers in the figure:

[0023] 1. Fixed bottom plate; 2. Bracket; 3. Winch drive device; 4. Drum; 5. Wire rope body; 6. Fixed plate; 7. Transmission device; 8. Rope guiding mechanism; 801. Threaded rod; 802. Threaded moving block; 803. Straight plate; 804. Guide roller; 805. Sliding block; 806. Guide rod; 807. Sliding rod; 9. Tension detection mechanism; 901. Tension sensor; 902. Torsion plate; 903. Detection controller; 904. Operation button; 905. Display panel; 906. Sound and light alarm; 907. First positioning pulley; 908. Second positioning pulley; 909. Connecting plate; 10. Feedback clamping mechanism; 1001. Connecting frame; 1002. Two-way electric telescopic rod; 1003. Connecting straight plate; 1004. Clamp. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] like Figures 1 to 4 As shown, this embodiment provides a rope coring winch overload lifting protection device, including a fixed base plate 1, the upper end of the fixed base plate 1 is fixedly connected with a bracket 2, and a winch driving device 3 is installed on the bracket 2, a drum 4 is installed at the left end of the winch driving device 3, and a wire rope body 5 is wound on the drum 4, a transmission device 7 is installed at the left end of the drum 4, a fixed plate 6 is fixedly connected to the upper end of the fixed base plate 1, and a rope guiding mechanism 8 is provided between the fixed plate 6 and the transmission device 7, a tension detection mechanism 9 is installed on the wire rope body 5, and a feedback clamping mechanism 10 is installed between the tension detection mechanism 9 and the drum 4.

[0026] In this specific embodiment, the rope guiding mechanism 8 includes a threaded rod 801, a threaded moving block 802, a guide roller 804, a sliding block 805, a guide rod 806 and a sliding rod 807; the end of the threaded rod 801 is transmission-connected to the output end of the transmission device 7, the threaded moving block 802 is arranged on the threaded rod 801 and is transmission-connected to the threaded rod 801; two straight plates 803 are arranged in parallel at the lower part of one side of the sliding block 805, two guide rollers 804 are arranged between the two straight plates 803, two guide rods 806 are arranged at the upper part of one side of the sliding block 805, the guide rollers 804 and the guide rods 806 are arranged at the upper part of one side of the sliding block 805, and the guide rollers 804 and the guide rods 806 are arranged at the upper part of the one side of the sliding block 805. The rods 806 are all able to rotate along their respective axes; the sliding rod 807 is arranged between the bracket 2 and the transmission device 7, and a through guide hole is arranged on the sliding rod 807. The sliding rod 807 passes through the through guide hole, and the inner diameter of the through guide hole is larger than the outer diameter of the sliding rod 807. Therefore, when the threaded rod 801 rotates, the sliding rod 807 can prevent the threaded moving block 802 from rotating, so that the threaded moving block 802 can move linearly along the axis of the threaded rod 801; the other end of the wire rope body 5 passes through the gap between the two guide rollers 804 and then passes through the gap between the two guide rods 806.

[0027] The tension detection mechanism 9 includes a tension sensor 901, a torsion plate 902, a first positioning pulley 907, a second positioning pulley 908, a connecting plate 909 and a detection controller 903; a first positioning pulley 907 is arranged above one side of the torsion plate 902, and a second positioning pulley 908 is arranged below one side of the torsion plate 902; the middle part of the other side of the torsion plate 902 is rotatably connected to one end of the connecting plate 909, and the other end of the connecting plate 909 is connected to the fixed plate 6, and the tension sensor 901 is arranged between the upper part of the other side of the torsion plate 902 and the middle part of the connecting plate 909; the steel wire rope body 5 passes through the space between the second positioning pulley 908 and the first positioning pulley 907; the detection controller 903 is electrically connected to the tension sensor 901; the detection controller 903 is electrically connected to the winch drive device 3 and the feedback clamping mechanism 10 respectively. The sound and light alarm 906 is arranged on the housing of the transmission device 7, and the sound and light alarm 906 is electrically connected to the detection controller 903.

[0028] The steel wire rope 5 passes through the space between the second positioning pulley 908 and the first positioning pulley 907. The steel wire rope 5 between the second positioning pulley 908 and the first positioning pulley 907 is bent to a certain extent. When the tension on the steel wire rope 5 changes, the bending degree will change accordingly, thereby changing the relative position of the second positioning pulley 908 and the first positioning pulley 907 in the vertical direction, driving the torsion plate 902 to rotate at a certain angle, thereby changing the stretched length of the tension sensor 901, so as to detect different tension values, thereby measuring the tension on the steel wire rope 5.

[0029] The feedback clamping mechanism 10 includes a connecting frame 1001, a two-way electric telescopic rod 1002, a connecting straight plate 1003 and a clamping plate 1004; one end of the connecting frame 1001 is connected to the bracket 2, and a two-way electric telescopic rod 1002 is arranged below the other end of the connecting frame 1001, and the two free ends of the two-way electric telescopic rod 1002 are respectively arranged to be connected to one end of a connecting straight plate 1003, and a clamping plate 1004 is arranged at the other end of the connecting straight plate 1003; the two clamping plates 1004 are located on both sides of the reel 4. The inner wall of the clamping plate 1004 is provided with anti-slip grooves. The two-way electric telescopic rod 1002 is electrically connected to the detection controller 903. When the tension sensor 901 detects that the tension of the wire rope body 5 is too large, the detection controller 903 transmits a signal to the two-way electric telescopic rod 1002, so that the two-way electric telescopic rod 1002 moves and then drives the clamping plate 1004 to hold the reel 4 tightly, so that the reel 4 remains fixed.

[0030] During the use of this solution, the detection controller 903 in the tension detection mechanism 9 sets the corresponding overload tension value according to the tension test data of the wire rope body 5 before leaving the factory, and then the winch drive device 3 drives the drum 4 to rotate, and the drum 4 drives the lowered wire rope body 5 to lift upward, so that the wire rope body 5 drives the inner core tube and the rock core to lift upward from the inside of the borehole. At the same time, the tension sensor 901 synchronously detects the tension on the wire rope body 5 and synchronously displays it on the display panel 905 on the detection controller 903. , and the lifted wire rope 5 passes through a pair of guide rods 806 and guide rollers 804 in the rope guiding mechanism 8 in turn, and is wound on the drum 4. In the winding process, the transmission device 7 drives the threaded rod 801 to rotate synchronously with the drum 4, drives the threaded moving block 802 and the sliding block 805 to move horizontally, and the traction wire rope 5 is wound stably and orderly along the outer end of the drum 4, and it is not easy to be disordered and cross-entangled, thereby improving the stability of the lifting and winding. In the lifting process, the inner core tube is stuck with the inner wall of the borehole. When the winch drive device 3 drives the drum 4 to continue to pull the wire rope body 5 up, the wire rope body 5 is stuck and cannot be lifted upward, while the winch drive device 3 is still working, causing the tension on the wire rope body 5 to become larger and larger. When the tension on the wire rope body 5 reaches a predetermined overload tension value, the detection controller 903 drives the sound and light alarm 906 to alarm and stop the winch drive device 3. Since the drive of the rope coring winch is mostly driven by a motor, the motor rotor is still affected by the rotational force due to inertia after the motor stops, and it is still It will continue to rotate for a distance, which will drive the reel 4 to continue to rotate, and the bidirectional electric telescopic rod 1002 in the feedback clamping mechanism 10 receives the alarm information, driving a pair of clamping plates 1004 to clamp and fix the reel 4 to keep it stable, so that the reel 4 is not easy to continue to rotate due to inertia, and the wire rope 5 is avoided from being broken due to overload tension, further enhancing the protection effect, and when the sound and light alarm 906 sounds an alarm, the staff can know the situation in time and carry out inspection and maintenance during the shutdown to facilitate subsequent work.

[0031] See also Figure 1 and Figure 2 The rope guiding mechanism 8 includes a threaded rod 801 rotatably connected to the left end of the fixed plate 6, the threaded rod 801 is connected to the output end of the transmission device 7, the outer end of the threaded rod 801 is threadedly connected to a threaded moving block 802, and the front end of the threaded moving block 802 is fixedly connected to a pair of straight plates 803, and a pair of guide rollers 804 are installed between the pair of straight plates 803, a sliding rod 807 is fixedly connected between the outer ends of the fixed plate 6 and the transmission device 7, and the outer end of the sliding rod 807 is sleeved with a sliding block 805, the front end of the sliding block 805 is fixedly connected to a pair of guide rods 806, and the lower end of the sliding block 805 is connected to the upper end of the threaded moving block 802, the upper end of the wire rope body 5 passes through a pair of guide rollers 804 and the guide rod 806 in sequence, and extends to the upper side thereof.

[0032] During use of the present scheme, when the wire rope body 5 is installed and wound on the drum 4, one end of the wire rope body 5 passes through a pair of guide rods 806 and guide rollers 804 in sequence and then is wound on the drum 4, so that the wire rope body 5 is neatly and orderly arranged and wound on the drum 4. Moreover, when the winch driving device 3 drives the wire rope body 5 to lift upward through the drum 4, the transmission device 7 drives the threaded rod 801 to rotate synchronously with the drum 4, so that it drives the threaded moving block 802 to move horizontally. At the same time, the threaded moving block 802 drives the sliding block 805 to move synchronously along the sliding rod 807. With the help of a pair of guide rods 806 and guide rollers 804, the wire rope body 5 is driven to move horizontally during the lifting and winding process, and is neatly and orderly arranged and wound along the outer end of the drum 4. It is not easy to be confused or cross-entangled, thereby avoiding interference with the lifting work and ensuring its stability.

[0033] See also Figure 1 and Figure 3 The tension detection mechanism 9 includes a tension sensor 901 installed on the wire rope body 5, a protective tube 902 is installed on the outer end of the tension sensor 901, a detection controller 903 is installed on the upper end of the transmission device 7, and the detection controller 903 is electrically connected to the tension sensor 901, a display panel 905 is embedded and installed on the left end of the detection controller 903, and a plurality of operation buttons 904 are fixedly connected to the left end of the detection controller 903, the detection controller 903 is electrically connected to the winch drive device 3, and an audible and visual alarm 906 is installed on the upper end of the transmission device 7, and the audible and visual alarm 906 is electrically connected to the detection controller 903.

[0034] During use of this solution, the steel wire rope body 5 will be subjected to a tension test before leaving the factory to obtain the data of the ultimate tension value it bears. The staff will set the corresponding overload tension value in the detection controller 903 according to the ultimate tension value in the manual. During the upward pulling and lifting process of the steel wire rope body 5, the tension sensor 901 synchronously detects the tension exerted on the steel wire rope body 5 and synchronously displays it through the display panel 905. After the inner core tube is stuck with the inner wall of the borehole, when the winch drive device 3 drives the drum 4 to continue to pull the steel wire rope body 5 upward, the steel wire rope body 5 cannot be lifted upward due to the jamming, and the winch drive device 3 is still working, so that the tension exerted on the steel wire rope body 5 becomes larger and larger. When the tension exerted on it reaches the predetermined overload tension value, the detection controller 903 drives the sound and light alarm 906 to alarm, and stops the winch drive device 3, reminding the on-site staff to perform appropriate inspections and repairs after the shutdown, so as to facilitate subsequent work.

[0035] See also Figure 1 and Figure 4The feedback clamping mechanism 10 includes a connecting frame 1001 fixedly connected to the winch drive device 3, a bidirectional electric telescopic rod 1002 is installed on the inner top of the connecting frame 1001, and it is electrically connected to the detection controller 903, the front and rear ends of the bidirectional electric telescopic rod 1002 are fixedly connected with connecting straight plates 1003, and the ends close to a pair of connecting straight plates 1003 are fixedly connected with clamping plates 1004, and the pair of clamping plates 1004 are respectively located on the front and rear sides of the reel 4.

[0036] During use of the present solution, the rope coring winch is mostly driven by an electric motor, which drives the drum 4 to rotate through the transmission of the belt and the pulley. After the motor stops, the motor rotor is still affected by the rotational force due to inertia and will continue to rotate for a distance, thereby driving the drum 4 to continue to rotate. Upon receiving the alarm message, the bidirectional electric telescopic rod 1002 immediately drives a pair of connecting straight plates 1003 to move towards each other, so that it drives a pair of clamping plates 1004 to clamp and fix the drum 4 to keep it stable, making it difficult for the drum 4 to continue to rotate due to inertia, avoiding the phenomenon of the wire rope body 5 being broken due to overload, and further enhancing the protective effect.

[0037] During use of the present invention, the anti-slip grooves are provided to increase the friction between the clamping plate 1004 and the reel 4, thereby improving the firmness of the clamping and fixing.

[0038] It should be noted that, for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, so it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure mark in the claims should not be regarded as limiting the claims involved.

[0039] This specification uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the method and core idea of ​​the utility model. At the same time, for those skilled in the art, according to the idea of ​​the utility model, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the utility model.

Claims

1. A rope coring winch overload lifting protection device, characterized in that: The invention comprises a fixed base plate, a bracket, a winch driving device, a drum, a wire rope body, a fixed plate, a transmission device, a rope-laying guide mechanism, a tension detection mechanism and a feedback clamping mechanism; the bracket is arranged on one side of the top surface of the fixed base plate, and the transmission device is arranged on the other side of the top surface of the fixed base plate; the winch driving device is arranged on the bracket, one end of the drum is transmission-connected to the winch driving device, and the other end of the drum is transmission-connected to the transmission device, the rope-laying guide mechanism is arranged between the transmission device and the bracket, and the rope-laying guide mechanism is transmission-connected to the transmission device; one end of the wire rope body is wound around the drum, and the other end of the wire rope body is connected to the tension sensor in the tension detection mechanism after passing through the rope-laying guide mechanism, the feedback clamping mechanism is arranged on the bracket, the feedback clamping mechanism is used to stop the drum from rotating, and the tension detection mechanism is electrically connected to the winch driving device and the feedback clamping mechanism respectively.

2. The overload lifting protection device for a rope coring winch according to claim 1 is characterized in that: The rope guiding mechanism includes a threaded rod, a threaded moving block, a guide roller, a sliding block, a guide rod and a sliding rod; the end of the threaded rod is transmission-connected to the output end of the transmission device, and the threaded moving block is arranged on the threaded rod and transmission-connected to the threaded rod; two guide rollers are arranged on the lower part of one side of the sliding block, and two guide rods are arranged on the upper part of one side of the sliding block; the sliding rod is arranged between the bracket and the transmission device, and a through guide hole is arranged on the sliding rod, and the sliding rod passes through the through guide hole; the other end of the wire rope body passes through the gap between the two guide rollers and then passes through the gap between the two guide rods.

3. The overload lifting protection device for a rope coring winch according to claim 2 is characterized in that: Two straight plates are arranged at the lower part of one side of the sliding block, and the two guide rollers are arranged between the two straight plates.

4. The overload lifting protection device for a rope coring winch according to claim 1 is characterized in that: The tension detection mechanism includes a tension sensor, a torsion plate, a first positioning pulley, a second positioning pulley, a connecting plate and a detection controller; the first positioning pulley is arranged above one side of the torsion plate, and the second positioning pulley is arranged below one side of the torsion plate; the middle part of the other side of the torsion plate is rotatably connected to one end of the connecting plate, and the other end of the connecting plate is connected to the fixed plate, and the tension sensor is arranged between the upper part of the other side of the torsion plate and the middle part of the connecting plate; the wire rope body passes through the space between the second positioning pulley and the first positioning pulley; the detection controller is electrically connected to the tension sensor; the detection controller is electrically connected to the winch drive device and the feedback clamping mechanism respectively.

5. The overload lifting protection device for a rope coring winch according to claim 4 is characterized in that: The detection controller is provided with operation buttons and a display panel.

6. The overload lifting protection device for a rope coring winch according to claim 4 is characterized in that: An audible and visual alarm is arranged on the housing of the transmission device, and the audible and visual alarm is electrically connected to the detection controller.

7. The overload lifting protection device for a rope coring winch according to claim 1 is characterized in that: The feedback clamping mechanism includes a connecting frame, a two-way electric telescopic rod, a connecting straight plate and a clamping plate; one end of the connecting frame is connected to the bracket, and the two-way electric telescopic rod is arranged below the other end of the connecting frame, and the two free ends of the two-way electric telescopic rod are respectively connected to one end of the connecting straight plate, and the other end of the connecting straight plate is provided with the clamping plate; the two clamping plates are located on both sides of the reel.

8. The overload lifting protection device for a rope coring winch according to claim 7 is characterized in that: The inner wall of the clamping plate is provided with anti-slip grooves.

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