Pulley structure and well logging device

Abstract

The utility model relates to a pulley structure and a logging device, and relates to the technical field of logging equipment. The pulley structure comprises a lifting lug, two side frames, a middle shaft and a pulley, the lifting lug comprises two lifting lug hinging seats which are oppositely arranged in the first direction, and lifting lug hinging holes are formed in the lifting lug hinging seats; the two side frames are in one-to-one correspondence with the two lifting lug hinge seats respectively, each side frame comprises a side frame hinge seat, and a side frame hinge hole is formed in each side frame hinge seat; two ends of the middle shaft are respectively arranged on the two side frames; the pulley is rotatably arranged on the middle shaft; wherein the side frame hinge seats are inserted into the lifting lug hinge seats, and the side frame hinge holes are communicated with the corresponding lifting lug hinge holes to form connecting channels; the pulley structure further comprises a lifting lug pin assembly, and the lifting lug pin assembly is inserted into the connecting channel and is connected with the lifting lug and the side frame. According to the technical scheme, the problems that an existing pulley assembly cannot quickly take out a cable from a pulley, and the pulley assembly cannot be replaced in an operation state can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of well logging equipment, in particular to a pulley structure and a well logging device. Background Art

[0002] In oil and gas exploration and development, well logging is an important part of drilling operations. Currently, in well logging, the logging instrument is transported downhole via a cable on a pulley.

[0003] Pulleys are one of the commonly used tools in well logging operations and can be used to guide and suspend cables. Common pulley assemblies are often installed by threading or removing pulleys during cable installation, which has certain limitations. During the operation, the cable cannot be quickly removed from the pulley, and the pulley assembly cannot be replaced during operation, which brings inconvenience to well logging operations. Utility Model Content

[0004] The embodiments of the present application provide a pulley structure and a well logging device, which can solve the problems that the existing pulley assembly cannot quickly remove the cable from the pulley and cannot be replaced during operation.

[0005] In a first aspect, an embodiment of the present application provides a pulley structure, comprising:

[0006] A lifting lug, wherein the lifting lug comprises two lifting lug hinge seats arranged opposite to each other in a first direction, and a lifting lug hinge hole is provided on the lifting lug hinge seats;

[0007] Two side frames are arranged opposite to each other in the first direction and are respectively located on both sides of the lifting ear, the two side frames respectively corresponding to the two lifting ear hinge seats, the side frames include side frame hinge seats, and the side frame hinge seats are provided with side frame hinge holes;

[0008] A central axis, with two ends respectively disposed on the two side frames, the central axis being parallel to the first direction; and

[0009] a pulley rotatably disposed on the central shaft;

[0010] Among them, the side frame hinge seat is inserted into the lifting ear hinge seat, and the side frame hinge hole is connected with the corresponding lifting ear hinge hole to form a connecting channel; the pulley structure also includes a lifting ear pin assembly, and the lifting ear pin assembly is inserted into the connecting channel to connect the lifting ear and the side frame.

[0011] In one embodiment, the ear pin assembly comprises:

[0012] A pin is inserted into the connecting channel;

[0013] a limiting portion, provided at one end of the pin shaft, wherein the diameter of the limiting portion is larger than the diameter of the pin shaft, so as to form a limiting step surface abutting against the lifting ear hinge seat; and

[0014] a locking portion, rotatably disposed at an end of the pin shaft away from the limiting portion;

[0015] Wherein, in the locked state, the angle between the locking portion and the pin is 90°; in the disassembled state, the angle between the locking portion and the pin is 0°.

[0016] In one embodiment, the locking portion includes:

[0017] A movable rod, one end of which is hinged to the pin shaft, and the other end of which is provided with a connecting block, wherein the diameter of the connecting block is the same as the diameter of the movable rod to form a connecting step surface;

[0018] a positioning sleeve, sleeved on the movable rod, the positioning sleeve being capable of sliding along the movable rod, and the positioning sleeve being located on a side of the connecting block close to the pin shaft; and

[0019] an elastic member, sleeved on the movable rod, wherein one end of the elastic member is connected to the positioning sleeve, and the other end is connected to the connecting step surface;

[0020] Wherein, in the locked state, the positioning sleeve abuts against the circumferential surface of the pin shaft; in the disassembled state, the positioning sleeve abuts against the end surface of the pin shaft away from the limiting portion.

[0021] In one embodiment, a locking countersunk hole is provided on the circumferential surface of the pin shaft, and a disassembly countersunk hole is provided on the end surface of the pin shaft away from the limiting portion.

[0022] In one embodiment, the lifting ear hinge seat is provided with a plurality of lifting ear hinge grooves spaced apart along the axial direction of the central axis, and a lifting ear hinge block is formed between two adjacent lifting ear hinge grooves;

[0023] The side frame hinge seat is provided with a plurality of side frame hinge blocks arranged at intervals along the axial direction of the central axis, and a side frame hinge groove is formed between two adjacent side frame hinge blocks;

[0024] Among them, the multiple side frame articulation blocks correspond one-to-one to the multiple lifting ear articulation grooves, and the side frame articulation blocks are inserted into the corresponding lifting ear articulation grooves. The lifting ear articulation blocks correspond one-to-one to the side frame articulation grooves, and the lifting ear articulation blocks are inserted into the corresponding side frame articulation grooves.

[0025] In one embodiment, the lifting eye hinge hole passes through the lifting eye hinge block in the axial direction of the central axis, and the side frame hinge hole passes through the side frame hinge block in the axial direction of the central axis.

[0026] In one embodiment, the pulley structure further includes two side plates, the two side plates are spaced apart along the first direction, and the two side plates correspond to the two side frames respectively, and the side plates are arranged on the corresponding side frames.

[0027] In one embodiment, the side plate is located on a side of the corresponding side frame close to the pulley.

[0028] In one embodiment, the pulley structure includes a plurality of fasteners, and the side plate is provided with a plurality of sockets, and the plurality of sockets are located outside the wheel surface of the pulley;

[0029] Wherein, the fastener is inserted into the insertion hole to connect the two side panels.

[0030] In a second aspect, an embodiment of the present application provides a well logging device, comprising the pulley structure as described above.

[0031] Compared with the prior art, the advantage of the embodiment of the present application is that, by providing two lifting lug articulated seats spaced apart in the first direction and the side frame articulated seats respectively connected thereto, two sets of independent connection structures are formed, which do not interfere with each other. The operator can arbitrarily choose to open one set of connection structures as needed, so that one set of lifting lug articulated seats is separated from the corresponding side frame articulated seats, while the other set of lifting lug articulated seats is normally connected to the corresponding side frame articulated seats, thereby realizing a side-open pulley structure, which can expose the position of the pulley for installing the cable, facilitating the installation of the cable, and compared with the existing cable installation method that often involves threading or removing the pulley, the present invention can quickly complete the installation and removal of the cable on the pulley during the operation process. The lifting lug and the side frame are connected by inserting the lifting lug pin assembly into the connection channel. The connection method is simple and convenient, and can be quickly disassembled and assembled, which not only facilitates the installation of the cable, but also enables the replacement of various components of the pulley structure during the logging operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The present invention will be described in more detail below based on embodiments with reference to the accompanying drawings.

[0033] Figure 1 This is a structural diagram of a pulley structure provided by an embodiment of the present utility model;

[0034] Figure 2 yes Figure 1 A schematic structural diagram of the ear pin assembly provided in the embodiment;

[0035] Figure 3 yes Figure 1 A schematic structural diagram of the side panel provided in the embodiment.

[0036] Reference numerals:

[0037] 10. Lifting eye; 110. Lifting eye hinge seat; 1101. Lifting eye hinge block;

[0038] 20, side frame; 210, side frame hinge seat; 2101, side frame hinge block;

[0039] 30, central axis;

[0040] 40. Pulley;

[0041] 50. Lifting ear pin assembly; 510. Pin shaft; 5101. Locking countersunk hole; 520. Positioning portion; 530. Locking portion; 5301. Movable rod; 5302. Positioning sleeve; 5303. Elastic member;

[0042] 60, side panel; 610, jack;

[0043] 70. Fasteners;

[0044] 80. Locking sleeve. DETAILED DESCRIPTION

[0045] The present invention will be further described below with reference to the accompanying drawings.

[0046] Pulleys are one of the commonly used tools in well logging operations and can be used to guide and suspend cables. Common pulley assemblies are often installed by threading or removing pulleys during cable installation, which has certain limitations. During the operation, the cable cannot be quickly removed from the pulley, and the pulley assembly cannot be replaced during operation, which brings inconvenience to well logging operations.

[0047] like Figure 1 As shown, in order to solve the above technical problems, at least one embodiment of the present application provides a pulley structure, comprising a lifting eye 10, two side frames 20, a central axis 30 and a pulley 40; the lifting eye 10 includes two lifting eye hinge seats 110 arranged opposite to each other in a first direction, and the lifting eye hinge seats 110 are provided with lifting eye hinge holes; the two side frames 20 are arranged opposite to each other in the first direction and are respectively located on both sides of the lifting eye 10, and the two side frames 20 correspond one to one with the two lifting eye hinge seats 110 respectively, and the side frames 20 include side frame hinge seats 210 , a side frame hinge hole is provided on the side frame hinge seat 210; the two ends of the central axis 30 are respectively provided on the two side frames 20, and the central axis 30 is parallel to the first direction; the pulley 40 is rotatably provided on the central axis 30; wherein, the side frame hinge seat 210 is inserted into the lifting ear hinge seat 110, and the side frame hinge hole is connected with the corresponding lifting ear hinge hole to form a connecting channel; the pulley structure also includes a lifting ear pin assembly 50, which is inserted into the connecting channel to connect the lifting ear 10 and the side frame 20.

[0048] As can be seen from the above, by providing two lifting eye hinge seats 110 spaced apart in the first direction and the side frame hinge seats 210 connected thereto, two independent connection structures are formed, which do not interfere with each other. The operator can arbitrarily open one of the connection structures as needed, so that one set of lifting eye hinge seats 110 is separated from the corresponding side frame hinge seat 210, while the other set of lifting eye hinge seats 110 is normally connected to the corresponding side frame hinge seat 210, thereby realizing a side-open pulley structure, which can expose the position of the pulley 40 for installing the cable, facilitating the installation of the cable. Compared with the existing cable installation method that often requires threading or removing the pulley 40, the present invention can quickly complete the installation and removal of the cable on the pulley 40 during the operation. The lifting eye 10 and the side frame 20 are connected by inserting the lifting eye pin assembly 50 into the connection channel. The connection method is simple and convenient, and can be quickly disassembled and assembled, which not only facilitates the installation of the cable, but also enables the replacement of various components of the pulley structure during the logging operation.

[0049] It should be noted that if Figure 1 As shown, the first direction is parallel to the X direction.

[0050] It should also be noted that the hanging ear 10 is a common suspension structure in the prior art, which has the functions of swinging and rotating, and can meet the adaptive requirements of the direction change when the cable is suspended.

[0051] It should also be noted that the pulley 40 is sleeved on the central axis 30 to ensure the normal rotation of the pulley 40; in addition, the two side frames 20 are respectively a first side frame 20 and a second side frame 20, one end of the central axis 30 is connected to the first side frame 20, and the second side frame 20 is provided with a through hole for the central axis 30 to pass through; and a locking sleeve 80 is provided on the second side frame 20 to connect the second side frame 20 to the central axis 30.

[0052] like Figure 1 As shown, the pulley structure includes a lifting ear 10, two side frames 20, a central axis 30 and a pulley 40; the lifting ear 10 includes two lifting ear hinge seats 110 arranged opposite to each other in the first direction, and the lifting ear hinge seat 110 is provided with a lifting ear hinge hole; the two side frames 20 are arranged opposite to each other in the first direction and are respectively located on both sides of the lifting ear 10, and the two side frames 20 correspond to the two lifting ear hinge seats 110 one by one, and the side frame 20 includes a side frame hinge seat 210, and the side frame hinge seat 210 is provided with a A side frame hinge hole is provided; the two ends of the central axis 30 are respectively arranged on the two side frames 20, and the central axis 30 is parallel to the first direction; the pulley 40 is rotatably arranged on the central axis 30; wherein, the side frame hinge seat 210 is inserted into the lifting ear hinge seat 110, and the side frame hinge hole is connected with the corresponding lifting ear hinge hole to form a connecting channel; the pulley structure also includes a lifting ear pin assembly 50, which is inserted into the connecting channel to connect the lifting ear 10 and the side frame 20.

[0053] By providing two lifting eye hinge seats 110 spaced apart in the first direction and the side frame hinge seats 210 connected thereto, two independent connection structures are formed, which do not interfere with each other. The operator can arbitrarily open one of the connection structures as needed, so that one set of lifting eye hinge seats 110 is separated from the corresponding side frame hinge seat 210, while the other set of lifting eye hinge seats 110 is normally connected to the corresponding side frame hinge seat 210, thereby realizing a side-open pulley structure, which can expose the position of the pulley 40 for installing the cable, facilitating the installation of the cable. Compared with the existing cable installation method that often requires threading or removing the pulley 40, the present invention can quickly complete the installation and removal of the cable from the pulley 40 during the operation process. The lifting eye 10 and the side frame 20 are connected by inserting the lifting eye pin assembly 50 into the connection channel. The connection method is simple and convenient, and can be quickly assembled and disassembled, which not only facilitates the installation of the cable, but also enables the replacement of various components of the pulley structure during the logging operation.

[0054] It should be noted that if Figure 1 As shown, the first direction is parallel to the X direction.

[0055] It should also be noted that the hanging ear 10 is a common suspension structure in the prior art, which has the functions of swinging and rotating, and can meet the adaptive requirements of the direction change when the cable is suspended.

[0056] It should also be noted that the pulley 40 is sleeved on the central shaft 30 to ensure normal rotation of the pulley 40.

[0057] like Figure 1 、 Figure 2 As shown, in some embodiments, the ear pin assembly 50 includes a pin shaft 510, a limiting portion 520 and a locking portion 530; the pin shaft 510 is inserted into the connecting channel; the limiting portion 520 is arranged at one end of the pin shaft 510, and the diameter of the limiting portion 520 is larger than the diameter of the pin shaft 510 to form a limiting step surface abutting against the ear hinge seat 110; the locking portion 530 is rotatably arranged at the end of the pin shaft 510 away from the limiting portion 520; wherein, in the locked state, the angle between the locking portion 530 and the pin shaft 510 is 90°; in the disassembled state, the angle between the locking portion 530 and the pin shaft 510 is 0°.

[0058] The lifting ear 10 and the side frame 20 are connected by a pin shaft 510 passing through the connection channel, and the pin shaft 510 is positioned in the axial direction of the pin shaft 510 by using the limiting part 520 and the locking part 530, which can effectively ensure the reliability of the connection, and the switching between the locking state and the disassembly state can be achieved only by rotating the locking part 530, which is convenient and fast, and the installation is reliable, which facilitates the rapid installation of the cable. When in the disassembly state, the locking portion 530 is rotated to be coaxial with the pin shaft 510, so that the straight locking portion 530 and the pin shaft 510 can be inserted into the connecting channel until the limiting step surface abuts against the lifting ear hinge seat 110, thereby facilitating the disassembly and assembly of the lifting ear pin assembly 50 and realizing rapid disassembly and assembly between the lifting ear 10 and the side frame 20; when in the locked state, the locking portion 530 is rotated to an angle of 90° with the pin shaft 510, so that the locking portion 530 limits the pin shaft 510, thereby improving the reliability of the connection between the lifting ear pin assembly 50 and the lifting ear 10 and the side frame 20.

[0059] like Figure 1 、 Figure 2 As shown, in some embodiments, the locking portion 530 includes a movable rod 5301, a positioning sleeve 5302 and an elastic member 5303; one end of the movable rod 5301 is hinged to the pin 510, and the other end is provided with a connecting block, the diameter of the connecting block is the same as the diameter of the movable rod 5301, so as to form a connecting step surface; the positioning sleeve 5302 is sleeved on the movable rod 5301, and the positioning sleeve 5302 can slide along the movable rod 5301, and the positioning sleeve 5302 is located on the side of the connecting block close to the pin 510; the elastic member 5303 is sleeved on the movable rod 5301, one end of the elastic member 5303 is connected to the positioning sleeve 5302, and the other end is connected to the connecting step surface; wherein, in the locked state, the positioning sleeve 5302 abuts against the circumferential surface of the pin 510; in the disassembly state, the positioning sleeve 5302 abuts against the end face of the pin 510 away from the limiting portion 520.

[0060] When switching from the locked state to the disassembly state, press the positioning sleeve 5302 to move the positioning sleeve 5302 to the side of the circumferential surface away from the pin shaft 510, and the elastic member 5303 is compressed. Then rotate the movable rod 5301 to be coaxial with the pin shaft 510, loosen the positioning sleeve 5302, and under the action of the elastic member 5303, make the positioning sleeve 5302 abut against the end face of the pin shaft 510 away from the limiting portion 520, thereby facilitating the removal of the ear pin assembly 50 from the connecting channel. When switching from the disassembly state to the locking state, press the positioning sleeve 5302 to move the positioning sleeve 5302 to the side away from the end face of the pin shaft 510, and the elastic member 5303 is compressed. Then rotate the movable rod 5301 to be perpendicular to the pin shaft 510, loosen the positioning sleeve 5302, and under the action of the elastic member 5303, the positioning sleeve 5302 is abutted against the circumferential surface of the pin shaft 510, thereby achieving rapid locking and ensuring connection reliability.

[0061] It should be noted that a mounting groove is provided at one end of the pin 510 away from the limiting portion 520, and one end of the movable rod 5301 is hinged in the mounting groove.

[0062] It should also be noted that the elastic member 5303 includes but is not limited to a spring; in addition, a positioning hole is provided on the positioning sleeve 5302 for the movable rod 5301 to pass through, and the positioning hole matches the shape of the movable rod 5301.

[0063] like Figure 2 As shown, in some embodiments, a locking countersunk hole 5101 is provided on the circumferential surface of the pin shaft 510 , and a disassembly countersunk hole is provided on the end surface of the pin shaft 510 away from the limiting portion 520 .

[0064] By setting the locking countersunk hole 5101 and the disassembly countersunk hole to provide abutment space for the positioning sleeve 5302, part of the positioning sleeve 5302 can enter the locking countersunk hole 5101 and the disassembly countersunk hole, thereby avoiding the switching of the pin state of the lifting ear 10 caused by misoperation and further ensuring reliability.

[0065] It should be noted that the end of the positioning sleeve 5302 close to the pin shaft 510 is spherical or conical.

[0066] like Figure 2 As shown, in some embodiments, the ear hinge seat 110 is provided with a plurality of ear hinge grooves arranged at intervals along the axial direction of the central axis 30, and an ear hinge block 1101 is formed between two adjacent ear hinge grooves; the side frame hinge seat 210 is provided with a plurality of side frame hinge blocks 2101 arranged at intervals along the axial direction of the central axis 30, and a side frame hinge groove is formed between two adjacent side frame hinge blocks 2101; wherein, the plurality of side frame hinge blocks 2101 respectively correspond to the plurality of ear hinge grooves one by one, and the side frame hinge blocks 2101 are inserted into the corresponding ear hinge grooves, and the ear hinge blocks 1101 respectively correspond to the side frame hinge grooves one by one, and the ear hinge blocks 1101 are inserted into the corresponding side frame hinge grooves.

[0067] In some embodiments, the lifting ear hinge hole passes through the lifting ear hinge block 1101 in the axial direction of the central axis 30, and the side frame hinge hole passes through the side frame hinge block 2101 in the axial direction of the central axis 30.

[0068] By inserting the side frame hinge block 2101 into the lifting ear hinge groove and the lifting ear hinge block 1101 into the side frame hinge groove, an interlaced concave and convex structure is formed, so that the lifting ear hinge seat 110 and the side frame hinge seat 210 can be quickly and accurately positioned, and the lifting ear hinge hole and the side frame hinge hole can be quickly aligned, which not only facilitates the installation of the lifting ear pin assembly 50, but also further improves the reliability of the connection between the side frame 20 and the lifting ear 10.

[0069] It should be noted that the specific number of the lifting eye hinge slots and the side frame hinge blocks 2101 is set as needed; for example, Figure 2 As shown, there are two lifting eye hinge slots and two side frame hinge blocks 2101.

[0070] It should also be noted that the two sides of the side frame hinge block 2101 are respectively fitted with the lifting ear hinge groove, and the two sides of the lifting ear hinge block 1101 are respectively fitted with the side frame hinge groove.

[0071] like Figure 3 As shown, in some embodiments, the pulley structure further includes two side plates 60 , which are arranged at intervals along the first direction, and the two side plates 60 correspond one-to-one to the two side frames 20 , respectively, and the side plates 60 are arranged on the corresponding side frames 20 .

[0072] like Figure 3 As shown, in some embodiments, the side plate 60 is located on a side of the corresponding side frame 20 close to the pulley 40 .

[0073] It should be noted that the side panels 60 and the side frames 20 are connected, including but not limited to, by screws; and the side panels 60 may be arc-shaped.

[0074] like Figure 3 As shown, in some embodiments, the pulley structure includes a plurality of fasteners 70, and a plurality of sockets 610 are provided on the side plate 60, and the plurality of sockets 610 are located on the outside of the wheel surface of the pulley 40; wherein, the fasteners 70 are passed through the sockets 610 to connect the two side plates 60.

[0075] By providing fasteners 70 to connect the two side plates 60, the connection stability of the side frame 20 is enhanced, and by providing multiple sockets 610 to provide multiple installation positions for the fasteners 70, the operator can select the appropriate through-hole position to install the fasteners 70 according to the straightening direction of the cable, thereby avoiding interference between the cable and the fasteners 70 and causing interference with the operation of the cable.

[0076] It should be noted that the fastener 70 includes but is not limited to a quick pin, for example, the fastener 70 is a long pin shaft 510; in addition, a plurality of jacks 610 are arranged circumferentially around the side plate 60 to meet the requirements of fixed installation in the straight direction of the cable at multiple angles.

[0077] When installing the cable, first remove the fastener 70 on the side panel 60, then remove one of the ear pin assemblies 50, disconnect the ear 10 from one of the side frames 20, flip the ear 10 sideways to open it, expose the pulley 40, and install the cable into the pulley 40; then flip the ear 10 to its original position, reinsert the ear pin assembly 50 and lock it, and reinsert the quick pin to complete the cable installation.

[0078] like Figure 1-3As shown, at least one embodiment of the present application further provides a logging device, including the pulley structure of any embodiment of the present application, and thus having all the technical effects brought about by the technical solutions of the above embodiments.

[0079] While the present invention has been described with reference to preferred embodiments, various modifications may be made and equivalent components may be substituted without departing from the scope of the present invention. In particular, the various technical features described in the various embodiments may be combined in any manner, provided no structural conflicts exist. The present invention is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions within the scope of the claims.

Claims

1. A pulley structure, characterized in that: include: A lifting lug, wherein the lifting lug comprises two lifting lug hinge seats arranged opposite to each other in a first direction, and a lifting lug hinge hole is provided on the lifting lug hinge seats; Two side frames are arranged opposite to each other in the first direction and are respectively located on both sides of the lifting ear, the two side frames respectively corresponding to the two lifting ear hinge seats, the side frames include side frame hinge seats, and the side frame hinge seats are provided with side frame hinge holes; A central axis, with two ends respectively disposed on the two side frames, the central axis being parallel to the first direction; and a pulley rotatably disposed on the central shaft; Among them, the side frame hinge seat is inserted into the lifting ear hinge seat, and the side frame hinge hole is connected with the corresponding lifting ear hinge hole to form a connecting channel; the pulley structure also includes a lifting ear pin assembly, and the lifting ear pin assembly is inserted into the connecting channel to connect the lifting ear and the side frame.

2. The pulley structure according to claim 1, characterized in that: The ear pin assembly comprises: A pin is inserted into the connecting channel; a limiting portion, provided at one end of the pin shaft, wherein the diameter of the limiting portion is larger than the diameter of the pin shaft, so as to form a limiting step surface abutting against the lifting ear hinge seat; and a locking portion, rotatably disposed at an end of the pin shaft away from the limiting portion; Wherein, in the locked state, the angle between the locking portion and the pin is 90°; in the disassembled state, the angle between the locking portion and the pin is 0°.

3. The pulley structure according to claim 2, characterized in that: The locking portion comprises: A movable rod, one end of which is hinged to the pin shaft, and the other end of which is provided with a connecting block, wherein the diameter of the connecting block is the same as the diameter of the movable rod to form a connecting step surface; a positioning sleeve, sleeved on the movable rod, the positioning sleeve being capable of sliding along the movable rod, and the positioning sleeve being located on a side of the connecting block close to the pin shaft; and an elastic member, sleeved on the movable rod, wherein one end of the elastic member is connected to the positioning sleeve, and the other end is connected to the connecting step surface; Wherein, in the locked state, the positioning sleeve abuts against the circumferential surface of the pin shaft; in the disassembled state, the positioning sleeve abuts against the end surface of the pin shaft away from the limiting portion.

4. The pulley structure according to claim 3, characterized in that: A locking countersunk hole is provided on the circumferential surface of the pin shaft, and a disassembly countersunk hole is provided on the end surface of the pin shaft away from the limiting portion.

5. The pulley structure according to any one of claims 1 to 4, characterized in that: The lifting lug hinge seat is provided with a plurality of lifting lug hinge grooves spaced apart along the axial direction of the central axis, and a lifting lug hinge block is formed between two adjacent lifting lug hinge grooves; The side frame hinge seat is provided with a plurality of side frame hinge blocks arranged at intervals along the axial direction of the central axis, and a side frame hinge groove is formed between two adjacent side frame hinge blocks; Among them, the multiple side frame articulation blocks correspond one-to-one to the multiple lifting ear articulation grooves, and the side frame articulation blocks are inserted into the corresponding lifting ear articulation grooves. The lifting ear articulation blocks correspond one-to-one to the side frame articulation grooves, and the lifting ear articulation blocks are inserted into the corresponding side frame articulation grooves.

6. The pulley structure according to claim 5, characterized in that: The lifting eye hinge hole passes through the lifting eye hinge block in the axial direction of the central axis, and the side frame hinge hole passes through the side frame hinge block in the axial direction of the central axis.

7. The pulley structure according to claim 1, characterized in that: The pulley structure further includes two side plates, the two side plates are spaced apart along the first direction, and the two side plates correspond to the two side frames respectively, and the side plates are arranged on the corresponding side frames.

8. The pulley structure according to claim 7, characterized in that: The side plate is located on a side of the corresponding side frame close to the pulley.

9. The pulley structure according to claim 8, characterized in that: The pulley structure includes a plurality of fasteners, and the side plate is provided with a plurality of sockets, and the plurality of sockets are located outside the wheel surface of the pulley; Wherein, the fastener is inserted into the insertion hole to connect the two side panels.

10. A well logging device, characterized in that: The invention comprises the pulley structure according to any one of claims 1 to 9.

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