A sectional combined winch drum for drilling subglacial lakes in Antarctica

Abstract

The application provides a sectional combined winch drum for drilling subglacial lakes in Antarctica, and belongs to the field of drilling machines, and comprises a drum body, a transmission mechanism and a cable arranging block. The drum body comprises at least two coaxially connected drum units. Each drum unit comprises a drum outer tube, a drum and a guide rail. The drum is arranged in the drum outer tube. All the drums in the drum body rotate synchronously, so that the cable is wound on or released from the drum along with the rotation of the drum. The cable arranging block is used to drive the cable to be wound on or released from the drum in a reciprocating manner along the guide rail in the drum unit. The transmission mechanism drives the cable arranging block to move up and down along the guide rail in the drum. The application modularizes each part of the drum through modular design, prevents the winch drum from being bent due to excessive length, has the function of releasing a long cable, can make a thermal melting probe drill into a deeper depth, and improves the working reliability.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of drilling machinery, and relates to a winch drum, in particular to a sectional combined winch drum for Antarctic subglacial lake drilling. BACKGROUND

[0002] Antarctic subglacial lakes are covered by ice and snow for a long time, cannot exchange a large amount of material with the external environment, and have extreme environmental characteristics such as low temperature, high pressure and darkness, so they are likely to breed special forms of life. Scientific drilling is the only means to obtain water samples from Antarctic subglacial lakes. Currently, recyclable thermal melting probes for pollution-free drilling and sampling of Antarctic subglacial lakes are being developed worldwide, and the biggest feature of the winch is that it is placed inside the thermal melting probe, and the thermal melting probe is drilled downward and returned upward by controlling the cable release and collection of the internal winch. However, the thermal melting probe usually has a strict diameter limit, so in order to achieve sufficient cable capacity, the length of the internal winch must be increased. The existing structure is mostly a single long drum directly winding the cable, for example: "Analysis of the matching of crane wire rope and drum", Wang Jingang, Li Xin'kai, Engineering Technology II, Equipment Management and Maintenance, 2020(6): 152-153, "Analysis of the problem of wire rope sinking and disordering during winding on the drum", Wang Liang, Xia Shoujin, Engineering Technology II, China's New Technology and New Products, 2022(01), and "Drum wire rope winding and arrangement technology and design", Ding Bangjian, Hong Lei, Jiang Guohua, Engineering Technology II, Building mechanization, 2016, 37(08), but due to the limitations of current material science and technology, the excessively long drum will be severely deformed under the cable tension, greatly reducing the working reliability, and even unable to work. Therefore, how to reasonably design the drum structure to ensure sufficient cable capacity while having sufficient working reliability is a difficult problem for recyclable thermal melting probes. SUMMARY

[0003] In view of the above problems, the purpose of the present application is to provide a sectional combined winch drum for Antarctic subglacial lake drilling, which is applied to a recyclable thermal melting probe, has the performance requirements of short length of each unit and not easy to bend, and can work in a deep ice layer drilling environment. The sectional combined winch drum designed by the present application can make the cable first wind and collect in one of the drum units, then cross the drum unit to enter the next drum unit to continue winding and collecting the cable, automatically release the cable during drilling, and automatically recover the cable during recycling, avoiding damage to the drum due to excessive winding torque caused by excessively long single drum length.

[0004] The present application provides a sectional combined winch drum for Antarctic subglacial lake drilling, which comprises a drum body, a transmission mechanism and a wire arrangement block.

[0005] The drum body is equipped with an upper end cover and a lower end cover at both ends. A through hole for the cable to pass through is reserved on the upper end cover. The drum body includes at least two coaxially connected drum units. Each drum unit includes an outer drum tube, a drum, and a guide rail. The drum is set inside the outer drum tube. The drum is parallel to the central axis of the outer drum tube and is eccentrically arranged. The central axis of the drum and the outer drum tube are not concentric. The guide rail is fixed on the inner wall of the outer drum tube. The surfaces of all guide rails in the drum body are flush. The upper end of the drum in the uppermost drum unit in the drum body extends from the upper end cover and is connected to the external drum motor. It is also connected to the upper end cover through a first tapered bearing. The lower end of the drum in the lowermost drum unit extends from the lower end cover and is connected to the lower end cover through a second tapered bearing. At the same time, the drums in adjacent drum units are connected by a plug-in method. Driven by the drum motor, all the drums in the drum body rotate synchronously, so that the cable is wound or released on the drum as the drum rotates.

[0006] The transmission mechanism includes a gearbox, a steering sprocket, and a chain. The gearbox is mounted on the upper end cover, the steering sprocket is mounted on the lower end cover, and the chain is disposed inside the drum. The upper end of the chain is connected to the first sprocket in the gearbox, and the lower end of the chain is connected to the second sprocket in the steering sprocket. The second sprocket and the first sprocket work together to drive the chain to move. The chain is used to drive the cable guide block to move along the guide rail inside the drum unit.

[0007] The cable guide block is fixedly mounted on the chain. The first sprocket in the gearbox rotates under the drive of the external cable guide motor, thereby driving the chain connected to the first sprocket to rotate. The cable passes through the cable guide block. When the drum rotates, the cable guide block moves up and down along the guide rail in the drum unit to cooperate with the drum to complete the cable winding or unwinding action. After the current drum unit completes the winding or unwinding of the cable, the cable guide block enters the next drum unit to continue to cooperate with the drum to complete the cable winding or unwinding action.

[0008] Furthermore, each of the said reel units has threads on the reel to serve as a cable track groove.

[0009] Further, the gear box comprises a gear box shell, a first transmission shaft, a second bearing, a bearing cover, a first shaft sleeve, a transmission gear, a first sprocket, a second transmission shaft and a gear box base, the gear box base is fixedly installed on the upper end cover, the gear box base is connected with the gear box shell to form a box structure, the first transmission shaft, the second bearing, the bearing cover, the first shaft sleeve, the transmission gear, the first sprocket and the second transmission shaft are arranged inside the box structure, the first transmission shaft is arranged in the vertical direction, the input end of the first transmission shaft is connected with the output end of the external wire arrangement device motor, the second transmission shaft is arranged in the horizontal direction, and the second bearing, the bearing cover, the first shaft sleeve and the transmission gear are arranged on the first transmission shaft and the second transmission shaft, the second bearing is arranged in the bearing cover, the bearing covers arranged on the first transmission shaft and the second transmission shaft are fixedly arranged on the inner wall of the gear box shell and the gear box base respectively, and the transmission gears on the first transmission shaft and the second transmission shaft are connected with each other in meshing mode; the first sprocket is arranged on the second transmission shaft and rotates synchronously with the second transmission shaft; the wire arrangement device motor is used for inputting power, the power is first transmitted to the first transmission shaft through the wire arrangement device motor, the first transmission shaft transmits the power to the transmission gear, the transmission gear transmits the power to the second transmission shaft, and the second transmission shaft transmits the power to the first sprocket.

[0010] Further, the wire arrangement device block comprises a sliding block, a support cover, a shell, a pulley, a second pin shaft, a second shaft sleeve, a pulley frame, a third shaft sleeve and a third pin shaft, the sliding block is connected to the outside of the shell through the second pin shaft and can rotate around the second pin shaft, and the sliding block is slidably connected with the guide rail in the winding drum unit; the support cover is installed on the shell, and a through hole for the cable to pass through is formed in the support cover; the shell is provided with a chain assembly hole in interference fit with the chain, so that the shell is fixed on the chain; the number of the second shaft sleeves is two, and the two second shaft sleeves are arranged between the pulley frame and the support cover and between the pulley frame and the shell respectively; the pulley frame is arranged inside the shell; the number of the pulleys is two, and the two pulleys are arranged on the pulley frame through the two third pin shafts respectively, and each pulley can rotate around the corresponding third pin shaft, and the pulley assembly formed by the two pulleys is used for changing the movement direction of the cable; the third shaft sleeve is arranged between the third pin shaft and the pulley.

[0011] Further, the steering sprocket comprises a sprocket frame, a second sprocket, a third bearing, a sprocket shaft and a snap spring, the two ends of the sprocket shaft are installed on the sprocket frame, the second sprocket, the third bearing and the snap spring are installed on the sprocket shaft, the third bearing is arranged at the connection position of the sprocket shaft and the sprocket frame, and the snap spring can be clamped in the sprocket frame to fix the third bearing.

[0012] The segmented combined winch drum for drilling subglacial lakes in the South Pole further comprises a wire guide, which is arranged at the drum connection position of the two adjacent drum units, and comprises a wire guide body, a first pin shaft, a first bearing, a first set screw and a second set screw.

[0013] Preferably, the wire guide body is in the shape of a hexagonal star, and the V-shaped notch formed between the adjacent two angles serves as a gap for the cable to pass through.

[0014] Further, the outer pipes of the drums in the two adjacent drum units are coaxially connected through an outer pipe connector, which comprises a first connecting ring, a second connecting ring, a second bolt and a third bolt.

[0015] Further, the thickness of the wire guide is greater than the sum of the thicknesses of the first connecting ring and the second connecting ring.

[0016] Through the above design scheme, the present application can bring the following beneficial effects:

[0017] 1. Through the modular design, the present application modularizes each part of the winch drum, and sequentially installs the parts from top to bottom during the assembly process, which facilitates the installation and prevents the winch drum from being bent due to excessive torque caused by length;

[0018] 2. The winch drum can meet the function of releasing a large-length cable during the drilling process in the Antarctic large deep ice layer, and can make the hot-melt probe drill into a deeper depth, thereby improving the working reliability;

[0019] 3. The present application optimizes the form and size of the winch drum design structure, optimizes the space utilization, and enables a large-length cable to be placed in the winch drum structure without a large size;

[0020] 4. Through the design and optimization of the drum structure, the present application can realize the hot-melt probe recovery function during the drilling process in the large-depth ice layer. BRIEF DESCRIPTION OF DRAWINGS

[0021] The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application. In the drawings:

[0022] Figure 1 is a structural schematic view of a sectional combined winch drum for drilling subglacial lakes in Antarctica according to an embodiment of the present application;

[0023] Figure 2 is a top view of a sectional combined winch drum for drilling subglacial lakes in Antarctica according to an embodiment of the present application;

[0024] Figure 3 is a bottom view of a sectional combined winch drum for drilling subglacial lakes in Antarctica according to an embodiment of the present application;

[0025] Figure 4 is an internal view of a sectional combined winch drum for drilling subglacial lakes in Antarctica according to an embodiment of the present application, with the upper drum outer tube, the middle drum outer tube and the lower drum outer tube removed.

[0026] Figure 5 is a sectional view along the second bolt of a sectional combined winch drum for drilling subglacial lakes in Antarctica according to an embodiment of the present application;

[0027] Figure 6 is Figure 5 a partial enlarged view of the middle I;

[0028] Figure 7 is a sectional view along the third bolt of a sectional combined winch drum for drilling subglacial lakes in Antarctica according to an embodiment of the present application;

[0029] Figure 8 is Figure 7 a partial enlarged view of the middle II;

[0030] Figure 9 is a sectional view along the screw of a sectional combined winch drum for drilling subglacial lakes in Antarctica according to an embodiment of the present application;

[0031] Figure 10 is Figure 9 a partial enlarged view of the middle III;

[0032] Figure 11 is a structural schematic view of a sectional combined winch drum for drilling subglacial lakes in Antarctica according to an embodiment of the present application, with the gear box shell removed from the gear box;

[0033] Figure 12 is a structural schematic view of a wire arranging block of a sectional combined winch drum for drilling subglacial lakes in Antarctica according to an embodiment of the present application.

[0034] Figure 13 is a side view of the line guide block of the sectional combined winch drum for drilling subglacial lake in Antarctica according to an embodiment of the present application;

[0035] Figure 14 is an A-A sectional view of the line guide block of the sectional combined winch drum for drilling subglacial lake in Antarctica according to an embodiment of the present application;

[0036] Figure 15 is a schematic diagram of the steering sprocket structure of the sectional combined winch drum for drilling subglacial lake in Antarctica according to an embodiment of the present application;

[0037] Figure 16 is a schematic diagram of the line guide pulley structure of the sectional combined winch drum for drilling subglacial lake in Antarctica according to an embodiment of the present application.

[0038] The various signs in the figure are as follows: 1 - upper end cover, 2 - gear box, 201 - gear box shell, 202 - first transmission shaft, 203 - second bearing, 204 - bearing cover, 205 - first shaft sleeve, 206 - transmission gear, 207 - first sprocket, 208 - second transmission shaft, 209 - gear box base, 3 - line guide block, 301 - sliding block, 302 - support cover, 303 - shell, 304 - pulley, 305 - second pin shaft, 306 - second shaft sleeve, 307 - pulley frame, 308 - third shaft sleeve, 309 - third pin shaft, 4 - upper drum outer tube, 5 - first connecting ring, 6 - second connecting ring, 7 - middle drum outer tube, 8 - lower drum outer tube, 9 - lower end cover, 10 - steering sprocket, 1001 - sprocket frame, 1002 - second sprocket, 1003 - third bearing, 1004 - sprocket shaft, 1005 - circlip, 11 - first tapered bearing, 12 - second tapered bearing, 13 - first bolt, 14 - upper drum, 15 - first guide rail, 16 - line guide pulley, 17 - first pin shaft, 18 - middle drum, 19 - second guide rail, 20 - lower drum, 21 - third guide rail, 22 - chain, 23 - first bearing, 24 - first set screw, 25 - second bolt, 26 - third bolt, 27 - screw, 28 - second set screw. DETAILED DESCRIPTION

[0039] To more clearly illustrate the present invention, the following description, in conjunction with preferred embodiments and accompanying drawings, further clarifies the invention. Those skilled in the art should understand that the specific description below is illustrative rather than restrictive and should not be construed as limiting the scope of protection of the invention. Unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. To avoid obscuring the essence of the invention, well-known methods, processes, flows, elements, and circuits are not described in detail. In the description of the invention, it should be understood that the terms "first," "second," and "third" are used for descriptive purposes only, and the features specified by "first," "second," and "third" do not indicate any order, quantity, or importance, but are merely used to distinguish different components.

[0040] like Figures 1 to 16 As shown, this embodiment provides a segmented combined winch drum for drilling subglacial lakes in Antarctica, including a drum body, a cable guide block 3, a transmission mechanism, and a cable guide wheel 16.

[0041] The winding drum body comprises upper winding drum unit, middle winding drum unit and lower winding drum unit connected coaxially from top to bottom in sequence, the upper winding drum unit comprises upper winding drum outer tube 4, upper winding drum 14 and first guide rail 15, the upper end of upper winding drum outer tube 4 is fixedly connected with upper end cover 1 through first bolt 13; upper winding drum 14 is located in upper winding drum outer tube 4, the upper end of upper winding drum 14 extends out of upper end cover 1 and is connected with winding drum motor, since the winding drum motor is not the design range of the application, it is not drawn in the figure, there is a through hole for cable passing through on upper end cover 1, the cable wound in the winch drum passes out of upper end cover 1; first conical bearing 11 is installed between upper winding drum 14 and upper end cover 1, first conical bearing 11 is used to support upper winding drum 14 and ensure that upper winding drum 14 can rotate normally; the lower end of upper winding drum 14 is inserted with middle winding drum 18 in middle winding drum unit; first guide rail 15 is fixed in the inner wall of upper winding drum outer tube 4 through screw 27; middle winding drum unit comprises middle winding drum outer tube 7, middle winding drum 18 and second guide rail 19, the upper end of middle winding drum outer tube 7 is connected with the lower end of upper winding drum outer tube 4 through outer tube connector, the lower end of middle winding drum outer tube 7 is also connected with the upper end of lower winding drum outer tube 8 through outer tube connector; the outer tube connector comprises first connecting ring 5, second connecting ring 6, second bolt 25 and third bolt 26, the first connecting ring 5 is fixedly arranged at the lower end of the upper winding drum outer tube in the upper winding drum unit of the adjacent two winding drum units through third bolt 26, the second connecting ring 6 is fixedly arranged at the upper end of the lower winding drum outer tube in the lower winding drum unit of the adjacent two winding drum units through third bolt 26, the first connecting ring 5 and the second connecting ring 6 are opposite to each other and are connected through second bolt 25, so that the adjacent two winding drum units are coaxially connected, that is, when the upper winding drum outer tube 4 and the middle winding drum outer tube 7 need to be assembled together, the first connecting ring 5 in the outer tube connector is fixed at the lower end of the upper winding drum outer tube 4 through third bolt 26, the second connecting ring 6 is fixed at the upper end of the middle winding drum outer tube 7 through third bolt 26, then the first connecting ring 5 and the second connecting ring 6 are connected through second bolt 25, so that the upper winding drum outer tube 4 and the middle winding drum outer tube 7 are assembled together; when the middle winding drum outer tube 7 and the lower winding drum outer tube 8 need to be assembled together, the first connecting ring 5 in the outer tube connector is fixed at the lower end of the middle winding drum outer tube 7 through third bolt 26, the second connecting ring 6 is fixed at the upper end of the lower winding drum outer tube 8 through third bolt 26, then the first connecting ring 5 and the second connecting ring 6 are connected through second bolt 25, so that the middle winding drum outer tube 7 and the lower winding drum outer tube 8 are assembled together.For the convenience of understanding, when assembling the sectional combined winch drum for Antarctic subglacial lake drilling, sectional assembly is adopted, that is, the upper drum outer tube 4 is assembled first, then the middle drum outer tube 7 is assembled, and finally the lower drum outer tube 8 and the internal components of the sectional combined winch drum for Antarctic subglacial lake drilling are assembled, so the first first connecting ring 5 from top to bottom is fixed at the lower end of the upper drum outer tube 4 by the third bolt 26, and the first first connecting ring 5 is a component of the upper drum unit assembly. Similarly, the first second connecting ring 6 from top to bottom is a component of the middle drum unit assembly, the second first connecting ring 5 from top to bottom is a component of the middle drum unit assembly, and the second second connecting ring 6 from top to bottom is a component of the lower drum unit assembly; the middle drum 18 is located inside the middle drum outer tube 7, the upper end of the middle drum 18 is inserted into the lower end of the upper drum 14, and the lower end of the middle drum 18 is inserted into the upper end of the lower drum 20; the second guide rail 19 is fixed on the inner wall of the middle drum outer tube 7 by the screw 27, and the surface of the second guide rail 19 is flush with the surface of the first guide rail 15, so that the wire arrangement block 3 can be directly moved from the first guide rail 15 to the second guide rail 19 and reciprocated on the first guide rail 15 and the second guide rail 19; the lower drum unit includes a lower drum outer tube 8, a lower drum 20 and a third guide rail 21, the lower end of the lower drum outer tube 8 is bolted to the lower end cover 9 by the first bolt 13; the lower drum 20 is located inside the lower drum outer tube 8, the upper end of the lower drum 20 is inserted into the middle drum 18, and the lower end of the lower drum 20 is connected to the second conical bearing 12 and extends out of the lower end cover 9, the second conical bearing 12 is used to support the lower drum 20 and ensure that the lower drum 20 can rotate normally; the third guide rail 21 is fixedly connected to the inner wall of the lower drum outer tube 8 by the screw 27, and the surfaces of the first guide rail 15, the second guide rail 19 and the third guide rail 21 are flush, so that the wire arrangement block 3 can be directly moved from the second guide rail 19 to the second guide rail 21 and reciprocated on the first guide rail 15, the second guide rail 19 and the third guide rail 21.

[0042] The wire arranging block 3 is mounted and fixed on the chain 22, the wire arranging block 3 comprises a sliding block 301, a support cover 302, a shell 303, a pulley 304, a second pin shaft 305, a second shaft sleeve 306, a pulley frame 307, a third shaft sleeve 308 and a third pin shaft 309, the chain 22 drives the wire arranging block 3 to move on the first guide rail 15, the second guide rail 19 and the third guide rail 21, and cooperates with the winding drum to complete the process of cable winding or releasing; the sliding block 301 is mounted on the outside of the shell 303 through the second pin shaft 305, the sliding block 301 can rotate around the second pin shaft 305 to adjust the sliding block 301 to the appropriate angle and slide with the first guide rail 15, the second guide rail 19 and the third guide rail 21; the support cover 302 is mounted on the shell 303 and is used for supporting the pulley frame 307; the shell 303 is designed with a chain assembly hole for the chain 22 to pass through and fix the wire arranging block 3 on the chain 22; the number of the pulley 304 is two, the two pulleys 304 are mounted in the pulley frame 307 through the two third pin shafts 309, the pulley 304 can rotate around the third pin shaft 309, the two pulleys 304 are both fixed pulleys, because they are limited by the third shaft sleeve 308 and the third pin shaft 309, so the relative position of the two pulleys 304 in the wire arranging block 3 will not change, the pulley 304 is used for changing the movement direction of the cable in the wire arranging block 3, such as Figure 14As shown, through the cooperation of the cable organizer motor and the winding drum motor and the control of the motion of the cable organizer block 3 and the winding drum, the cable is always in a horizontal direction through the circular gap between the two pulleys 304, and the cable is wound around the pulley 304, vertically upward through each winding drum unit and the upper end cover 1 in a taut state, extends out of the winding drum body, and is released to the outside. The pulley 304 serves to turn the vertically oriented cable into a horizontal direction, so that the winding drum winds or releases the cable in a horizontal direction. At the same time, when the cable is recovered, it also passes through the hole in the upper end cover 1 for the cable to enter the segmented combined winch winding drum for subglacial lake drilling proposed in the application, and through the control of the cable organizer motor and the winding drum motor, the cable is always kept in a taut state throughout the process. If the cable is loose, the cable winding and releasing action cannot be completed. The second shaft sleeve 306 is used to support and protect the pulley frame 307 and reduce the wear of the pulley frame 307. The number of second shaft sleeves 306 is two, and the two second shaft sleeves 306 are respectively installed between the pulley frame 307 and the support cover 302 and between the pulley frame 307 and the shell 303. The pulley frame 307 is fixed in the cable organizer block 3 and is used to limit the pulley 304. The pulley frame 307 is completely constrained by the support cover 302 and the shell 303, as well as the third shaft sleeve 308 and the third pin shaft 309. The pulley frame 307 is installed with the pulley 304. The third shaft sleeve 308 is installed between the third pin shaft 309 and the pulley 304 and is used to support the pulley 304 and protect the third pin shaft 309 and reduce the wear of the third pin shaft 309. The third pin shaft 309 is used to support and position the pulley 304 and ensure that the gap between the two pulleys 304 can pass through the cable.

[0043] The transmission mechanism comprises a gear box 2, a steering sprocket 10 and a chain 22, the gear box 2 is installed on the upper end cover 1, the gear box 2 is connected with the chain 22 through a first sprocket 207, the steering sprocket 10 is installed on the lower end cover 9, the steering sprocket 10 is connected with the chain 22 through a second sprocket 1002, and the steering sprocket 10 drives the chain 22 to rotate in cooperation with the first sprocket 207, the chain 22 drives the wire arranging block 3 to reciprocate on the first guide rail 15, the second guide rail 19 and the third guide rail 21; the gear box 2 comprises a gear box shell 201, a first transmission shaft 202, a second bearing 203, a bearing cover 204, a first shaft sleeve 205, a transmission gear 206, the first sprocket 207, a second transmission shaft 208 and a gear box base 209, the gear box base 209 is installed and fixed on the upper end cover 1, the gear box base 209 is connected with the gear box shell 201 to form a box structure, the first transmission shaft 202, the second bearing 203, the bearing cover 204, the first shaft sleeve 205, the transmission gear 206, the first sprocket 207 and the second transmission shaft 208 are arranged inside the box structure, the first transmission shaft 202 is placed in the vertical direction, an input end of the first transmission shaft 202 is connected with a wire arranging machine, the wire arranging machine is used for providing power and controlling the movement of the chain 22, the chain 22 further drives the wire arranging block 3 to move, the wire arranging machine is not in the design range of the segmented combined winch drum structure for subglacial lake drilling in the Antarctic proposed in the application, so it is not shown in the figure, the second transmission shaft 208 is placed in the horizontal direction, and the second bearing 203, the bearing cover 204, the first shaft sleeve 205 and the transmission gear 206 are installed on the first transmission shaft 202 and the second transmission shaft 208, the second bearing 203 is installed in the bearing cover 204, the bearing cover 204 arranged on the first transmission shaft 202 and the second transmission shaft 208 is fixed on the inner wall of the gear box shell 201 and the gear box base 209 respectively, and the transmission gears 206 on the first transmission shaft 202 and the second transmission shaft 208 are connected with each other, the transmission gears 206 change the power transmission direction, and the power provided by the wire arranging machine is transmitted from the first transmission shaft 202 to the second transmission shaft 208; the first sprocket 207 is arranged on the second transmission shaft 208 and rotates synchronously with the second transmission shaft 208. The first sprocket 207 is connected with the chain 22, drives the wire arranging block 3 to move on the first guide rail 15, the second guide rail 19 and the third guide rail 21 through the chain 22, cooperates with the movement of the drum, and completes the cable winding or releasing operation; the second bearing 203 is installed in the bearing cover 204, and plays a supporting role for the first transmission shaft 202 and the second transmission shaft 208 in the bearing cover 204; the bearing cover 204 is used for fixing the first transmission shaft 202 and the second transmission shaft 208; the gear box shell 201 covers the components of the entire gear box 2, protects the components and prevents dust from entering; the gear box base 209 is installed and fixed on the upper end cover 1.

[0044] The chain 22 is arranged in the winding drum body, the upper end of the chain 22 is connected with the first sprocket 207, the lower end of the chain 22 is connected with the second sprocket 1002, so that the chain 22 can move in the winding drum unit, the chain 22 is fixed with the wire arranging block 3, so that the wire arranging block 3 and the chain 22 do not move relatively, the movement of the chain 22 changes the position of the wire arranging block 3 in the winding drum. The first sprocket 207 and the second sprocket 1002 drive the chain 22 to move, and then drive the wire arranging block 3 to move. The size of the chain 22 is larger than the chain assembly hole of the wire arranging block 3 for the chain 22 to pass through, and the chain 22 is in interference fit with the chain assembly hole.

[0045] The steering sprocket 10 has no power input, and only cooperates with the gear box 2 to drive the chain 22 to move. The steering sprocket 10 includes a sprocket frame 1001, a second sprocket 1002, a third bearing 1003, a sprocket shaft 1004, and a snap spring 1005. The two ends of the sprocket shaft 1004 are installed on the sprocket frame 1001. The second sprocket 1002, the third bearing 1003, and the snap spring 1005 are installed on the sprocket shaft 1004. The third bearing 1003 is located at the connection between the sprocket shaft 1004 and the sprocket frame 1001. The snap spring 1005 is clamped on the sprocket frame 1001, which limits the position of the third bearing 1003 and prevents the third bearing 1003 from falling off. The second sprocket 1002 connects the chain 22.

[0046] The wire passing guide wheel 16 includes a wire passing guide wheel body, a first pin shaft 17, a first bearing 23, a first set screw 24, and a second set screw 28. The thickness of the wire passing guide wheel 16 is greater than the sum of the thicknesses of the first connecting ring 5 and the second connecting ring 6, which prevents the cable from being stuck in the gap between the wire passing guide wheel 16 and the first connecting ring 5 and the second connecting ring 6 during winding. The number of wire passing guide wheels 16 is two, which are respectively installed between the upper winding drum 14 and the middle winding drum 18, and between the middle winding drum 18 and the lower winding drum 20, and play a transition role for the entire cable segment and the cable winding process in the winding drum unit. The first pin shaft 17 is rotationally connected with the first bearing 23, which prevents the first bearing 23 from falling off and enables it to rotate normally. The first bearing 23 is installed on the first pin shaft 17 and can rotate around the first pin shaft 17. Two first bearings 23 form a pair and are installed on the same first pin shaft 17. Since the wire passing guide wheel 16 is fixed on the winding drum and does not move relatively, as shown in Figure 16 The six pairs of first bearings 23 in this embodiment are used to support the wire passing guide wheel 16 and reduce the wear between the wire passing guide wheel 16 and the first connecting ring 5 and the second connecting ring 6. The first set screw 24 fixes the two wire passing guide wheels 16 between the upper winding drum 14 and the middle winding drum 18, and between the middle winding drum 18 and the lower winding drum 20, which prevents the wire passing guide wheel 16 from moving relatively with the winding drum. The first pin shaft 17 is pre-drilled with screw holes that cooperate with the second set screw 28. The second set screw 28 fixes the first pin shaft 17 and prevents it from falling off.

[0047] The outer edges of the wire passing guide wheel body are uniformly arranged with V-shaped notches, the V-shaped notches are gaps for the cable to pass through, and the wire passing guide wheel body is in the shape of a hexagonal star in the embodiment, but is not limited thereto, and can be in the shape of a pentagonal star or a quadrangular star, the cable passes through the V-shaped notches to ensure that the cable can pass through smoothly; when the wire passing guide wheel 16 is fixed on the winding drum and rotates with the winding drum, there is always a gap for the cable to pass through when entering the next winding drum unit for winding, the design size of the wire passing guide wheel 16 is that the area of the wire passing guide wheel 16 is greater than the area of the winding drum, so as to meet the requirement of winding multiple layers of cables on the same horizontal plane in the winding drum unit during the cable winding and unwinding process, and the horizontal plane annular area occupied by the multiple layers of cables after winding is completed is still within the circumferential surface area of the wire passing guide wheel 16; at the same time, the wire passing guide wheel 16 can meet the winding or releasing action of the multiple layers of cables on the winding drum unit during the working process of the winding drum, so that the cable will not be stuck between the first connecting ring 5, the second connecting ring 6 and the wire passing guide wheel 16.

[0048] The process of assembling a complete wire passing guide wheel 16 is as follows: first, place the wire passing guide wheel body, which has a reserved through hole for the first pin shaft 17, then place the first bearing 23 at the corresponding position, align the first bearing 23 with the hole, then bolt connect and install the first pin shaft 17, the bolt connection passes through the first bearing 23, then the second set screw 28 is threadedly connected with the first pin shaft 17 and the wire passing guide wheel body, the first pin shaft 17 has a screw hole through which the second set screw 28 can pass, and the second set screw 28 fixes the first pin shaft 17, so the second set screw 28 is also installed and fixed on the wire passing guide wheel 16. The wire passing guide wheel body has a threaded hole, the first set screw 24 passes through the threaded hole to install and fix the wire passing guide wheel 16 and the winding drum on the winding drum, and no rotation and movement occurs.

[0049] The working principle of the present application is as follows:

[0050] The segmented combined winch drum for drilling subglacial lakes in the Antarctic provided by the present application is part of a hot-melt detector, and before the hot-melt detector is sent to the Antarctic glacier for work, the cable needs to be wound in the drum in the laboratory, i.e. the cable is wound on the upper drum 14, the middle drum 18 and the lower drum 20, and the first layer of cable is wound along the threaded track on the drum.

[0051] Firstly, the cable in the upper winding unit is wound, a section of cable is wound in advance in the upper winding drum 14, the cable passes through the pulley 304 in the wire arrangement block 3, and the cable passes through the pulley 304 vertically upward to the upper end cover 1, enters other components of the heat melting detector, and finally extends out of the heat melting detector. Under the control of the wire arrangement motor and the winding drum motor, the upper winding drum 14, the middle winding drum 18 and the lower winding drum 20 rotate synchronously, the wire arrangement block 3 cooperates with the rotation of the upper winding drum 14, so that after the cable passes through the wire arrangement block 3, the cable always reaches the upper winding drum 14 in a horizontal reference plane and in a taut state, and then starts to be wound. The cable is wound on the upper winding drum 14 along with the rotation of the upper winding drum 14. When a layer of cable is wound on the upper winding drum 14 from top to bottom, the wire arrangement block 3 also moves synchronously from the top of the first guide rail 15 to the bottom of the first guide rail 15 along with the winding process of the cable. Therefore, the second layer of cable starts to be wound on the upper winding drum 14, and the winding mode of the cable changes to be wound from bottom to top, that is, after the lowermost layer is wound on the same horizontal plane, the second layer is wound on the outer edge of the first layer, at this time, along with the rotation of the upper winding drum 14 and the synchronous cooperation of the wire arrangement block 3, the second layer of cable completely wraps the first layer of cable. The wire arrangement block 3 cooperates with the upper winding drum 14 to wind the cable, and moves from bottom to top. After the second layer is wound on the uppermost end of the upper winding drum 14, the third layer of cable is wound on the upper winding drum 14, and the winding mode of the upper winding drum 14 changes to be wound from top to bottom, that is, after the second layer is wound on the same horizontal plane, the third layer is wound on the outer edge of the second layer, at this time, along with the rotation of the upper winding drum 14 and the synchronous cooperation of the wire arrangement block 3, the third layer of cable completely wraps the second layer of cable, and the wire arrangement block 3 also moves from top to bottom, and reciprocates in this process. The wire arrangement block 3 always moves in the first guide rail 15 until the cable is completely wound on the upper winding drum 14.

[0052] After the winding of the cable in the upper winding unit is completed, since the first connecting ring 5 and the second connecting ring 6 are connected and fixed by the second bolt 25, and the openings of the first connecting ring 5 and the second connecting ring 6 are completely aligned, the first guide rail 15 passes through the first connecting ring 5 and the second connecting ring 6 and is connected with the second guide rail 19, and the surfaces of the first guide rail 15 and the second guide rail 19 are completely flush. Under the control of the wire arrangement motor, the wire arrangement block 3 moves from the first guide rail 15 to the second guide rail 19, and the cable passes through the V-shaped gap of the wire guide pulley 16 to the middle winding drum 18 in the middle winding unit along with the movement of the wire arrangement block 3.

[0053] After the cable and the cable arranging block 3 cross from the upper drum unit to the middle drum unit, there is no cable winding on the middle drum 18, at this time, the winding starts from the top of the middle drum 18, the cable arranging block 3 moves from the top to the bottom along the second guide rail 19, and the first layer of cable is wound from the top to the bottom along the thread track on the middle drum 18 with the rotation of the middle drum 18. After the middle drum 18 winds a layer, the position of the cable arranging block 3 is at the lower end of the middle drum unit, and then the second layer of cable is wound, the winding mode of the middle drum 18 changes to be from the bottom to the top, that is, after the first layer is wound in the same horizontal plane, the second layer is wound outside the first layer, at this time, the second layer of cable completely wraps the first layer of cable with the rotation of the middle drum 18 and the synchronous cooperation of the cable arranging block 3. On the second guide rail 19, the cable arranging block 3 changes to move from the bottom to the top, and the cable winding process on the middle drum 18 also changes to be from the bottom to the top. After the second layer of cable is wound, the third layer of cable is wound on the middle drum 18, at this time, the cable arranging block 3 moves to the upper end of the middle drum unit, and then the third layer is wound outside the second layer in the same horizontal plane after the second layer is wound, and the third layer of cable completely wraps the second layer of cable with the rotation of the middle drum 18 and the synchronous cooperation of the cable arranging block 3. At this time, the movement of the cable arranging block 3 on the second guide rail 19 changes to be from the top to the bottom, and the cable winding process changes to be from the top to the bottom with the rotation of the middle drum 18, and so on. During the process, the cable arranging block 3 always reciprocates on the second guide rail 19.

[0054] After the middle drum 18 winds multiple layers of cable, the cable arranging block 3 and the cable cross the cable guide pulley 16 and enter the lower drum unit, and the cable is wound on the lower drum 20, at this time, the cable arranging block 3 moves from the second guide rail 19 to the third guide rail 21, because the first guide rail 15, the second guide rail 19 and the third guide rail 21 are respectively connected and fixed on the inner walls of the upper drum outer tube 4, the middle drum outer tube 7 and the lower drum outer tube 8 through the screws 27, the surfaces of the first guide rail 15, the second guide rail 19 and the third guide rail 21 are flush, the cable arranging block 3 can directly move from the second guide rail 19 to the third guide rail 21, and the cable also crosses the cable guide pulley 16 to the lower drum 20 with the movement of the cable arranging block 3 and is wound from the uppermost end of the lower drum 20; the cable arranging block 3 moves from the top to the bottom on the third guide rail 21, and the cable is also wound from the top to the bottom with the rotation of the lower drum 20, after a layer is wound on the lower drum 20, the second layer of cable is wound on the lower drum 20, at this time, the position of the cable arranging block 3 is at the lower end of the lower drum unit, the movement direction of the cable arranging block 3 changes to be from the bottom to the top, and the cable winding process on the lower drum 20 is also from the bottom to the top. After the second layer is wound, the cable arranging block 3 moves to the upper end of the lower drum unit, and the third layer is wound on the lower drum 20, the movement of the cable arranging block 3 on the third guide rail 21 changes to be from the top to the bottom, and the cable winding process also changes to be from the top to the bottom, and so on. During the process, the cable arranging block 3 always reciprocates on the third guide rail 21, until the cable winding process is completed.

[0055] During the operation of the thermal melting detector, with the increase of the working depth, the detector moves downward to contact the ground equipment and transmit information through the cable. The cable is released from the winch drum, and the cable release needs to be synchronized with the rotation of the drum. During the cable release process, the cable is always in a tight state in the drum instead of a relaxed state, otherwise the cable will fall off the drum. Therefore, the up and down movement of the cable guide block 3 also indicates the synchronous release of the cable during the rotation of the drum.

[0056] The cable release of the winch drum is first carried out from the lower drum 20 of the lower drum unit. Assuming that during the winding of the cable, the cable guide block 3 is located at the lowermost end after the outermost layer of cable is wound on each drum unit, therefore, during the cable release process, the cable guide motor controls the cable guide block 3, the cable guide block 3 moves upward in cooperation with the lower drum 20, the cable is released, the outermost layer, i.e. the first layer of cable is released, then the second layer of cable is released, the cable guide block 3 moves downward again, the cable guide block 3 and the lower drum 20 rotate synchronously, then the third layer of cable is released, the movement of the cable guide block 3 changes to upward from the lower end, and so on, until the cable of the lower drum 20 is completely released. During this process, the cable guide block 3 always moves on the third guide rail 21.

[0057] After the cable release of the lower drum unit is completed, the cable of the middle drum unit is released, the cable guide block 3 moves from the third guide rail 21 to the second guide rail 19, i.e. from the lower drum unit to the middle drum unit, and the cable also crosses the V-shaped gap of the cable guide pulley 16. The cable guide block 3 moves upward on the second guide rail 19, the first layer of cable is released, then the second layer of cable is released, the cable guide block 3 moves to the uppermost end of the second guide rail 19 and moves downward from the upper end, and so on, until the cable of the middle drum 18 is completely released. During this process, the cable guide block 3 always moves on the second guide rail 19.

[0058] After the cable release of the middle drum unit is completed, the cable of the upper drum unit is released, the cable guide block 3 moves from the second guide rail 19 to the first guide rail 15, and the cable guide block 3 and the cable cross the gap between the first connecting ring 5, the second connecting ring 6 and the cable guide pulley 16. The cable guide block 3 moves upward on the first guide rail 15, the first layer of cable is released, then the second layer of cable is released, the cable guide block 3 moves to the uppermost end of the first guide rail 15 and moves downward from the upper end, and so on. During this process, the cable guide block 3 always moves on the first guide rail 15, until the cable is completely released when the thermal melting detector drills to the predetermined depth.

[0059] For the whole winch drum working process, the hot melt detector drills down in the process, the cable is released from the winch drum and is frozen in the ice layer in the ice borehole. When recovering the detector, the hot melt detector heats the upper ice layer to move upward, the ice layer around the cable is melted, at this time the cable is recovered to the winch drum until it returns to the ground.

[0060] The above description is only an embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A segmented combined winch drum for drilling subglacial lakes in Antarctica, characterized in that, Includes a drum body, a transmission mechanism, and a cable tray (3); The drum body is equipped with an upper end cap (1) and a lower end cap (9) at both ends, respectively. A through hole for the cable to pass through is reserved on the upper end cap (1). The drum body includes at least two coaxially connected drum units. Each drum unit includes a drum outer tube, a drum, and a guide rail. The drum is set inside the drum outer tube. The drum is parallel to the central axis of the drum outer tube and the drum is not concentric with the central axis of the drum outer tube. The guide rail is fixed on the inner wall of the drum outer tube. The surfaces of all guide rails in the drum body are flush. The uppermost drum unit in the drum body contains... The upper end of the drum extends out from the upper end cover (1) and is connected to the external drum motor, and is connected to the upper end cover (1) through the first tapered bearing (11). The lower end of the drum in the drum unit at the lowest end extends out from the lower end cover (9) and is connected to the lower end cover (9) through the second tapered bearing (12). At the same time, the drums in adjacent drum units are connected by plug-in connection. Under the drive of the drum motor, all the drums in the drum body rotate synchronously, so that the cable is wound or released on the drum as the drum rotates. The transmission mechanism includes a gearbox (2), a steering sprocket (10), and a chain (22). The gearbox (2) is mounted on the upper end cover (1), the steering sprocket (10) is mounted on the lower end cover (9), and the chain (22) is located inside the drum. The upper end of the chain (22) is connected to the first sprocket (207) in the gearbox (2), and the lower end of the chain (22) is connected to the second sprocket (1002) in the steering sprocket (10). The second sprocket (1002) and the first sprocket (207) work together to drive the chain (22) to move. The cable guide block (3) is fixedly installed on the chain (22). When the drum rotates, the cable guide block (3) is driven by the chain (22) to drive the cable to wind or release on the drum in a way that moves along the guide rail in the drum unit. When the current drum unit completes the winding or releasing of the cable, the cable guide block (3) enters the next drum unit to continue to cooperate with the drum to complete the winding or releasing of the cable.

2. The segmented combined winch drum for drilling subglacial lakes in Antarctica according to claim 1, characterized in that: Each of the said reel units has a threaded reel that serves as a cable track groove.

3. The segmented combined winch drum for drilling subglacial lakes in Antarctica according to claim 1, characterized in that: The gearbox (2) includes a gearbox housing (201), a first drive shaft (202), a second bearing (203), a bearing cover (204), a first bushing (205), a drive gear (206), a first sprocket (207), a second drive shaft (208), and a gearbox base (209). The gearbox base (209) is mounted and fixed on the upper end cover (1). The gearbox base (209) is connected to the gearbox housing (201) to form a housing structure. The first drive shaft (202), the second bearing (203), the bearing cover (204), the first bushing (205), the drive gear (206), the first sprocket (207), and the second drive shaft (208) are placed in the housing structure. Inside, the first drive shaft (202) is placed vertically, and the input end of the first drive shaft (202) is connected to the output end of the cable loader motor. The second drive shaft (208) is placed horizontally, and a second bearing (203), a bearing cover (204), a first bushing (205), and a transmission gear (206) are provided on both the first drive shaft (202) and the second drive shaft (208). The second bearing (203) is installed in the bearing cover (204), and the transmission gears (206) on the first drive shaft (202) and the second drive shaft (208) are meshed with each other. The first sprocket (207) is set on the second drive shaft (208) and rotates synchronously with the second drive shaft (208).

4. The segmented combined winch drum for drilling subglacial lakes in Antarctica according to claim 3, characterized in that: The bearing cover (204) set on the first drive shaft (202) is fixed to the inner wall of the gearbox housing (201), and the bearing cover (204) set on the second bearing (203) is fixed to the gearbox base (209).

5. The segmented combined winch drum for drilling subglacial lakes in Antarctica according to claim 1, characterized in that: The cable guide block (3) includes a slider (301), a support cover (302), a housing (303), a pulley (304), a second pin (305), a second bushing (306), a pulley frame (307), a third bushing (308), and a third pin (309). The slider (301) is connected to the outside of the housing (303) via the second pin (305) and can rotate around the second pin (305). At the same time, the slider (301) is slidably connected to the guide rail in the drum unit. The support cover (302) is installed on the housing (303) and has a through hole for the cable to pass through. The housing (303) has a chain mounting hole that is interference-fitted with the chain (22) to fix it to the chain. (22) On; There are two second bushings (306), which are respectively installed between the pulley frame (307) and the support cover (302) and between the pulley frame (307) and the housing (303); The pulley frame (307) is located inside the housing (303); There are two pulleys (304), which are respectively installed on the pulley frame (307) through two third pins (309), and each pulley (304) can rotate around its corresponding third pin (309). The pulley assembly formed by the two pulleys (304) is used to change the direction of cable movement; The third bushing (308) is installed between the third pin (309) and the pulley (304).

6. The segmented combined winch drum for drilling subglacial lakes in Antarctica according to claim 1, characterized in that: The steering sprocket (10) includes a sprocket frame (1001), a second sprocket (1002), a third bearing (1003), a sprocket shaft (1004), and a retaining ring (1005). The two ends of the sprocket shaft (1004) are mounted on the sprocket frame (1001). The second sprocket (1002), the third bearing (1003), and the retaining ring (1005) are mounted on the sprocket shaft (1004). The third bearing (1003) is located at the connection between the sprocket shaft (1004) and the sprocket frame (1001). At the same time, the retaining ring (1005) can be locked on the sprocket frame (1001). The retaining ring (1005) is used to limit the position of the third bearing (1003).

7. The segmented combined winch drum for drilling subglacial lakes in Antarctica according to claim 1, characterized in that: It also includes a wire guide wheel (16), which is set at the drum connection position of two adjacent drum units. The wire guide wheel (16) includes a wire guide wheel body, a first pin (17), a first bearing (23), a first set screw (24), and a second set screw (28). The outer edge of the wire guide wheel body is evenly arranged with V-shaped notches, which serve as gaps for the cable to pass through. The first set screw (24) is used to fix the wire guide wheel body on the drum so that the wire guide wheel (16) rotates synchronously with the drum. The first pin (17) has a screw hole reserved to cooperate with the second set screw (28), and the second set screw (28) is used to fix the first pin (17). The first bearing (23) is installed on the first pin (17) and can rotate around the first pin (17). A pair of first bearings (23) are installed on the same first pin (17).

8. The segmented combined winch drum for drilling subglacial lakes in Antarctica according to claim 7, characterized in that: The main body of the cable guide wheel is hexagonal, and the V-shaped notch formed between two adjacent corners serves as a gap for the cable to pass through.

9. The segmented combined winch drum for drilling subglacial lakes in Antarctica according to claim 7, characterized in that: The outer tubes of two adjacent drum units are coaxially connected by an outer tube connector. The outer tube connector includes a first connecting ring (5), a second connecting ring (6), a second bolt (25), and a third bolt (26). The first connecting ring (5) is fixedly installed at the lower end of the upper outer tube of the two adjacent drum units by the third bolt (26). The second connecting ring (6) is fixedly installed at the upper end of the lower outer tube of the two adjacent drum units by the third bolt (26). The first connecting ring (5) and the second connecting ring (6) are directly opposite each other and connected by the second bolt (25), so that the two adjacent drum units are coaxially connected.

10. The segmented combined winch drum for drilling subglacial lakes in Antarctica according to claim 9, characterized in that: The thickness of the guide wheel (16) is greater than the sum of the thicknesses of the first connecting ring (5) and the second connecting ring (6).

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