Pin pulling device for marine exploration detector

Abstract

The invention discloses a pin pulling device for a marine exploration geophone, and solves the technical problem that a pin of the geophone is difficult to disassemble. The device comprises a supporting frame, the supporting frame is provided with a limiting cylinder for insertion of the detector, the limiting cylinder is provided with a receding opening, the supporting frame is slidably connected with a supporting block, the sliding direction of the supporting block is perpendicular to the axial direction of the limiting cylinder, the supporting frame is provided with a driving piece used for controlling the supporting frame to slide, and the supporting block is provided with a pin pulling cylinder. The axial direction of the pin pulling barrel is perpendicular to the axial direction of the limiting barrel, the pin pulling barrel is aligned with the receding opening, a pin pulling rod is coaxially and movably arranged in the pin pulling barrel, a limiting ring is arranged at the end of the pin pulling barrel to prevent the pin pulling rod from moving towards the limiting barrel, and a pin pulling screw used for being in threaded connection with the pin pulling groove is coaxially arranged on the pin pulling rod. According to the invention, the demolition process of the detector is more convenient and rapid, the operation time efficiency is improved, and the risk of damage of the pins and the protective shell can be reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of geophone maintenance, and in particular relates to a pin-pulling device for an ocean exploration geophone. Background Art

[0002] At present, marine seismic exploration is usually carried out by artificially exciting seismic waves, which are reflected by the stratum and received by the submarine cable. The MEMS detectors in the submarine cable acquisition device often need to be repaired due to frequent failures. MEMS detectors usually include a detector body and a protective shell. The two sides of the detector body are riveted to the protective shell by 1 long pin and 3 short pins respectively, and the 1 long pin and the 3 short pins are arranged at 90° intervals. At the same time, the ends of each pin are respectively provided with pin extraction grooves for external tools to thread together.

[0003] At present, when disassembling the detector, an external tool is usually screwed into the pin extraction groove of the pin, and then the staff pulls the external screw to pull out the pin. When all the pins are pulled out, the detector body can be pulled out of the protective shell.

[0004] However, it is very laborious for workers to pull out the pins by hand, which not only increases the burden on workers but also affects the timeliness of the work. At the same time, when workers pull out the pins by hand, the direction of the pulling force is difficult to be parallel to the axial direction of the pins, which can easily cause the pins to bend and the protective shells to be damaged, making it difficult to reuse the pins and protective shells, increasing maintenance costs, which needs to be improved. Summary of the invention

[0005] In order to solve all or part of the above problems, the purpose of the present invention is to provide a pin removal device for a marine exploration detector, which makes the disassembly process of the detector more convenient and quick, reduces the burden on the staff, improves the work time efficiency, and reduces the risk of damage to the pins and protective shells, ensuring that the pins and protective shells can be recycled and reused, thereby reducing maintenance costs.

[0006] The present invention provides a pin-pulling device for an ocean exploration geophone, comprising:

[0007] Support frame, which plays a supporting role;

[0008] A limiting cylinder is arranged on the supporting frame, and the detector can be inserted into the limiting cylinder;

[0009] A clearance opening is arranged on the limiting cylinder, and when the detector is inserted into the limiting cylinder, one or more of the long pins or short pins of the detector can be aligned with the clearance opening;

[0010] A support block is slidably connected to the support frame, and the sliding direction of the support block is perpendicular to the axial direction of the limiting cylinder;

[0011] A driving member, disposed on the support frame and used to control the sliding of the support block;

[0012] A pin pulling cylinder is arranged on the supporting block, the axial direction of the pin pulling cylinder is perpendicular to the axial direction of the limiting cylinder, and the pin pulling cylinder is aligned with the clearance opening;

[0013] A pin pulling rod is movably inserted in the pin pulling cylinder, and the pin pulling rod and the pin pulling cylinder are coaxially arranged;

[0014] A limiting ring is arranged at one end of the pin pulling cylinder facing the limiting cylinder, and the limiting ring is used to prevent the pin pulling rod from moving toward the limiting cylinder;

[0015] A pin pulling screw is coaxially arranged at one end of the pin pulling rod facing the limiting cylinder. The pin pulling screw passes through the limiting ring and is used for threaded connection with the pin pulling grooves on the long pin and the short pin.

[0016] Optionally, a guide opening is provided on the limiting cylinder, the length direction of the guide opening is parallel to the axial direction of the limiting cylinder, and the guide opening is connected to the clearance opening so that the long pin can slide along the guide opening and enter the clearance opening.

[0017] Optionally, the clearance opening is in the shape of an elongated strip, and the length direction of the clearance opening is perpendicular to the axial direction of the limiting cylinder. When the long pin enters the clearance opening, the detector can rotate along its own axial direction and make the long pin slide along the clearance opening;

[0018] The arc corresponding to the clearance opening is 90°, and the clearance opening is parallel to the two inner side walls of the axial direction of the limiting cylinder to form a first limiting surface and a second limiting surface. When the long pin abuts against the first limiting surface, the pin pulling groove on the long pin is aligned with the pin pulling screw. When the long pin abuts against the second limiting surface, the pin pulling groove on the short pin adjacent to the long pin is aligned with the pin pulling screw.

[0019] Optionally, the support frame includes two support bases, the limiting cylinder is fixed on one of the support bases, the two support bases are connected by a pair of parallel guide rods, the axial direction of the guide rods is perpendicular to the axial direction of the limiting cylinder, and the support block is slidably matched with the pair of guide rods.

[0020] Optionally, the driving member includes a driving screw and a driving handwheel, the driving screw is located between a pair of guide rods, and the driving screw passes through the support block and is threadedly engaged with the support block, one end of the driving screw is rotatably connected to one of the support bases, and the other end is threadedly connected to the other support base, and the driving handwheel is fixed on the driving screw.

[0021] Optionally, a limit block and a clamping block are provided on the support block, and the pin pulling cylinder is movably arranged between the limit block and the clamping block. The limit block is fixedly connected to the support block, and the clamping block is slidably connected to the support block, and the sliding direction of the clamping block is perpendicular to the axial direction of the pin pulling cylinder. A control member for controlling the sliding of the clamping block is provided on the support block, so that the clamping block and the limit block can clamp the pin pulling cylinder together.

[0022] Optionally, the control member includes a control screw and a control handwheel, the control screw is threadedly connected to the support block, one end of the control screw is rotatably connected to the clamping block, and the other end is fixedly connected to the control handwheel.

[0023] Optionally, arc-shaped positioning grooves are respectively provided on the sides where the limiting block and the pressing block are close to each other, and the outer wall of the limiting cylinder matches the inner wall of the positioning groove, so that the inner walls of the two positioning grooves can clamp the pin pulling cylinder together.

[0024] Optionally, a positioning ring is provided at one end of the pin pulling cylinder away from the limiting cylinder, and the side of the positioning ring facing the limiting cylinder can abut against the limiting block and the pressing block for limiting.

[0025] Optionally, the pull-out rod includes a pulling rod and a limiting nut, the screw rod of the pull-out screw passes through the limiting nut, the end of the limiting nut is provided with a step groove for the nut of the pull-out screw to be inserted into, the pulling rod is prismatic, and the end of the pulling rod is provided with an installation groove, the limiting nut is threadedly connected to the installation groove, and the nut of the pull-out screw is pressed against the bottom of the installation groove.

[0026] It can be seen from the above technical solution that the pin-pulling device for ocean exploration geophones provided by the present invention has the following advantages:

[0027] This makes the detector disassembly process more convenient and quick, reduces the burden on staff, improves work efficiency, and can also reduce the risk of damage to the pins and protective shells, ensuring that the pins and protective shells can be recycled and reused, thereby reducing maintenance costs.

[0028] Other features and advantages of the present invention will be set forth in the description which follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0030] Figure 1 It is a schematic diagram of the overall structure of the pin pulling device in an embodiment of the present invention;

[0031] Figure 2 A cross-sectional view of a pin pulling cylinder in an embodiment of the present invention;

[0032] Figure 3 It is a cross-sectional view of the limiting cylinder in the embodiment of the present invention;

[0033] Figure 4 It is a schematic diagram of the structure of the detector and the limit cylinder in the embodiment of the present invention;

[0034] Figure 5 It is a structural schematic diagram of a support frame in an embodiment of the present invention;

[0035] Figure 6 An exploded view of a pin pulling rod in an embodiment of the present invention;

[0036] Figure 7 It is a cross-sectional view of the pin pulling rod in the embodiment of the present invention.

[0037] Description of reference numerals:

[0038] 1. Support frame; 101. Support base; 102. Guide rod; 2. Limit cylinder; 3. Make way opening; 4. Support block; 5. Driving member; 51. Driving screw; 52. Driving hand wheel; 6. Pin pulling cylinder; 7. Pin pulling rod; 71. Pulling rod; 72. Limit nut; 73. Step groove; 74. Mounting groove; 8. Limit ring; 9. Pin pulling screw; 10. Guide opening; 11. First limit surface; 12. Second limit surface; 13. Limit block; 14. Pressing block; 15. Control member; 151. Control screw; 152. Control hand wheel; 16. Positioning groove; 17. Positioning ring;

[0039] 100, detector; 200, long pin; 300, short pin; 400, pin extraction slot. DETAILED DESCRIPTION

[0040] To make the purpose, technical solution and advantages of the present invention more clear, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other arbitrarily without conflict.

[0041] like Figure 1-Figure 7 The embodiment of the present invention is shown in the figure, which discloses a pin-pulling device for a marine exploration detector, comprising a support frame 1, to which a cylindrical limiting cylinder 2 is fixedly connected, and the inner diameter of the limiting cylinder 2 is slightly larger than the outer diameter of the detector 100, so that the detector 100 can be inserted into the limiting cylinder 2. At the same time, a clearance opening 3 is provided on the limiting cylinder 2, and when the detector 100 is inserted into the limiting cylinder 2, one or more of the long pin 200 and the short pin 300 of the detector 100 can be aligned with the clearance opening 3.

[0042] In one embodiment, Figure 1 As shown, a support block 4 is slidably connected to the support frame 1 , and the sliding direction of the support block 4 is perpendicular to the axial direction of the limiting cylinder 2 . At the same time, a driving member 5 is provided on the support frame 1 , and the driving member 5 is used to control the sliding of the support block 4 .

[0043] In one embodiment, Figure 1 , Figure 2 As shown, a cylindrical pin pulling cylinder 6 is provided on the support block 4, the axial direction of the pin pulling cylinder 6 is perpendicular to the axial direction of the limiting cylinder 2, and the pin pulling cylinder 6 is aligned with the clearance opening 3, and a pin pulling rod 7 is coaxially and movably provided inside the pin pulling cylinder 6, that is, the pin pulling rod 7 can slide and rotate inside the pin pulling cylinder 6.

[0044] In one embodiment, Figure 1 , Figure 2 As shown, a limiting ring 8 is provided at one end of the pin pulling cylinder 6 facing the limiting cylinder 2, and the limiting ring 8 is used to prevent the pin pulling rod 7 from moving toward the limiting cylinder 2. A pin pulling screw 9 is coaxially provided at one end of the pin pulling rod 7 facing the limiting cylinder 2. The pin pulling screw 9 passes through the limiting ring 8 and is used to be threadedly connected to the pin pulling groove 400 on the long pin 200 or the short pin 300.

[0045] When it is necessary to remove the long pin 200 or the short pin 300, insert the detector 100 into the limiting cylinder 2, align the long pin 200 or the short pin 300 with the clearance opening 3, and ensure that the removal groove 400 on the long pin 200 or the short pin 300 is aligned with the removal screw 9, then rotate the removal rod 7 to rotate, and make the removal screw 9 threadedly connected with the removal groove 400. Next, the driving member 5 controls the support block 4 to drive the removal cylinder 6 to move in the direction away from the limiting cylinder 2. At this time, the limiting ring 8 is in contact with the removal rod 7 to limit the position, so that the removal rod 7 and the removal screw 9 can synchronously follow the movement of the removal cylinder 6, that is, the removal screw 9 can remove the long pin 200 or the short pin 300.

[0046] The marine exploration detector pin-pulling device in this embodiment makes the detector disassembly process more convenient and quick. Compared with the pin-pulling operation by the staff barehanded, this design can reduce the burden on the staff and improve the time efficiency of the operation. At the same time, the pin is pulled out by the pin-pulling screw 9. Since the axial direction of the pin-pulling screw 9 is parallel to the axial direction of the pin, the pin-pulling screw 9 can provide a force parallel to the axial direction of the pin, and the pin can be pulled out without damage, reducing the risk of damage to the pin and the protective shell, ensuring that the pin and the protective shell can be recycled and reused, thereby reducing the maintenance cost.

[0047] In one embodiment, Figure 1 , Figure 3As shown, the limiting cylinder 2 is provided with a guide opening 10, the length direction of the guide opening 10 is parallel to the axial direction of the limiting cylinder 2, and the guide opening 10 is connected with the clearance opening 3, so that the long pin 200 can slide along the guide opening 10 and enter the clearance opening 3. This design allows the staff to align the long pin 200 with the guide opening 10 when pulling out the long pin 200, so that the staff can observe the position of the long pin 200, thereby facilitating the staff to pull out the pin.

[0048] In one embodiment, Figure 1 , Figure 3 As shown, the clearance opening 3 is in an elongated strip shape, and the length direction of the clearance opening 3 is perpendicular to the axial direction of the limiting cylinder 2 . When the long pin 200 enters the clearance opening 3 , the detector 100 can rotate along its own axis and make the long pin 200 slide along the clearance opening 3 .

[0049] In one embodiment, Figure 3 , Figure 4 As shown, the arc corresponding to the clearance opening 3 is 90°, and the two inner side walls of the clearance opening 3 parallel to the axial direction of the limiting cylinder 2 form a first limiting surface 11 and a second limiting surface 12. When the long pin 200 abuts against the first limiting surface 11, the pin pulling groove 400 and the pin pulling screw 9 on the long pin 200 are aligned. When the long pin 200 abuts against the second limiting surface 12, the pin pulling groove 400 and the pin pulling screw 9 on the short pin 300 adjacent to the long pin 200 are aligned.

[0050] Reference Figure 4 In order to more clearly demonstrate the pinning device, the pinning operation of the detector is as follows:

[0051] The three short pins on the detector are named the first short pin, the second short pin, and the third short pin in counterclockwise direction, and the long pin is located between the first short pin and the third short pin. When the detector is unpinned, align the long pin with the guide port 10, and insert the detector into the limit tube 2 until the long pin enters the clearance port 3, then rotate the detector clockwise and make the long pin contact the second limit surface 12. At this time, the unpinning groove on the second short pin is aligned with the unpinning screw 9. Then, the unpinning screw 9 is threadedly connected to the unpinning groove on the second short pin, and the second short pin can be unpinned, and then the second short pin is removed from the unpinning screw 9, and then the unpinning screw 9 and other components are reset.

[0052] Next, the detector is rotated counterclockwise to make the long pin contact the first limit surface 11. At this time, the pin extraction groove on the long pin is aligned with the pin extraction screw 9, and then the above pin extraction and reset operation is repeated. Subsequently, the detector is rotated clockwise to align the pin extraction groove on the third short pin with the pin extraction screw 9, and then the above pin extraction operation is repeated to partially extract the third short pin.

[0053] Then, rotate the detector clockwise and make the third short pin contact with the second limit surface 12. At this time, the pin pulling groove on the fourth short pin is aligned with the pin pulling screw 9, and then repeat the above pin pulling and resetting operations. Finally, rotate the detector counterclockwise and make the third short pin contact with the first limit surface 11. At this time, the pin pulling groove on the third short pin is aligned with the pin pulling screw 9, and then repeat the above pin pulling and resetting operations to achieve the pin pulling operation of the long pin and the short pin on one side of the detector. Then, insert the other end of the detector into the limit tube 2 and repeat the above operation to achieve the pin pulling operation of the detector.

[0054] By setting a unique clearance opening 3, the clearance opening 3 can realize the positioning of the detector 100. The long pin 200 and the adjacent short pin 300 form a group, and the remaining two short pins 300 form a group. The two pins between each group can be positioned with each other through the first limiting surface 11 and the second limiting surface 12, so that the pin pulling groove 400 on the pin is automatically aligned with the pin pulling screw 9, which is convenient for the staff to pull the pins and improves work efficiency.

[0055] In one embodiment, Figure 1 , Figure 5 As shown, the support frame 1 includes two support bases 101, the limiting cylinder 2 is welded and fixed on one of the support bases 101, and the two support bases 101 are connected by a pair of parallel guide rods 102, the axial direction of the guide rods 102 is perpendicular to the axial direction of the limiting cylinder 2, and the support block 4 is slidably matched with the pair of guide rods 102, so that the support block 4 can drive the pin pulling cylinder 6, the pin pulling rod 7 and other components to slide smoothly.

[0056] In one embodiment, Figure 1 , Figure 5 As shown, the driving member 5 includes a driving screw 51 disposed between a pair of guide rods 102, the driving screw 51 passes through the support block 4 and is threadedly engaged with the support block 4. At the same time, one end of the driving screw 51 is rotatably connected to one of the support bases 101, and the other end passes through the other support base 101 and is threadedly connected to the support base 101. At the same time, the end of the driving handwheel 52 is fixedly connected to the driving handwheel 52. Rotating the driving handwheel 52 drives the driving screw 51 to rotate, and then the driving screw 51 can control the support block 4 to slide smoothly, thereby providing a uniform force for the pin pulling rod 7 and other components.

[0057] In one embodiment, Figure 1 , Figure 5As shown, a limit block 13 and a clamping block 14 are provided on the support block 4, and the pin pulling cylinder 6 is movably provided between the limit block 13 and the clamping block 14, that is, the pin pulling cylinder 6 can be disassembled. The limit block 13 is fixedly connected to the support block 4, and the clamping block 14 is slidably connected to the support block 4, and the sliding direction of the clamping block 14 is perpendicular to the axial direction of the pin pulling cylinder 6. At the same time, a control member 15 for controlling the sliding of the clamping block 14 is provided on the support block 4, so that the clamping block 14 and the limit block 13 can clamp the pin pulling cylinder 6 together.

[0058] In one embodiment, Figure 1 , Figure 5 As shown, the control member 15 includes a control screw 151 and a control hand wheel 152. The control screw 151 is threadedly connected to the support block 4, and one end of the control screw 151 is rotatably connected to the clamping block 14, and the other end is fixedly connected to the control hand wheel 152. Rotating the control hand wheel 152 drives the control screw 151 to rotate, and then the control screw can drive the clamping block 14 to move toward the limit block 13, and the clamping block 14 and the limit block 13 clamp the pin pulling cylinder 6 together.

[0059] In one embodiment, Figure 1 , Figure 5 As shown, arc-shaped positioning grooves 16 are respectively provided on the side where the limiting block 13 and the pressing block 14 are close to each other, and the outer wall of the limiting cylinder 2 matches the inner wall of the positioning groove 16, so that the inner walls of the two positioning grooves 16 can jointly clamp the pin pulling cylinder 6. This design can realize the limitation of the installation position of the limiting cylinder 2, and at the same time can also improve the clamping and limiting effect of the limiting cylinder 2, and reduce the risk of displacement of the limiting cylinder 2.

[0060] In one embodiment, Figure 1 , Figure 5 As shown, a positioning ring 17 is provided at one end of the pin pulling cylinder 6 away from the limiting cylinder 2. The side of the positioning ring 17 facing the limiting cylinder 2 can abut against the limiting block 13 and the clamping block 14 for limiting, so as to facilitate the staff to quickly determine the installation position of the limiting cylinder 2 and improve the working efficiency.

[0061] In one embodiment, Figure 6 , Figure 7 As shown, the pin pulling rod 7 includes a pulling rod 71 and a limiting nut 72. The screw rod of the pin pulling screw 9 passes through the limiting nut 72. The end of the limiting nut 72 is provided with a step groove 73 for the nut of the pin pulling screw 9 to be clamped.

[0062] In one embodiment, Figure 6 , Figure 7 As shown, the pull rod 71 is prismatic, and the edge of the pull rod abuts against the inner wall of the pin pulling tube 6. A mounting groove 74 is provided at the end of the pull rod 71. The limit nut 72 is threadedly connected to the mounting groove 74, and the nut of the pin pulling screw 9 is pressed against the bottom of the mounting groove 74.

[0063] In one embodiment, Figure 1 , Figure 2 As shown, the limiting nut 72 can abut against the limiting ring 8 to limit the position, so that when the pin pulling cylinder 6 moves in a direction away from the limiting cylinder 2, the pin pulling rod 7, the limiting nut 72 and the pin pulling screw 9 can move synchronously with the pin pulling cylinder 6.

[0064] This design allows the pin puller screw 9 to be disassembled. When the pin puller screw 9 is damaged, the staff can replace the pin puller screw 9 separately, reducing the maintenance cost. The prismatic pull rod 71 can increase the friction with the staff's hand to ensure that the staff can quickly turn the pull rod 71. At the same time, the edge of the pull plate rod abuts against the inner wall of the pin puller cylinder 6 to limit the pull rod 71. The pull rod 71 remains coaxial with the pin puller cylinder 6, thereby providing a stable pulling force for the pin puller screw 9.

[0065] It can be seen from the above process that the pin pulling device has the following advantages:

[0066] (1) The pin pulling device can provide a force parallel to the axial direction of the pin, and the pulling force provided by the driving screw 51 is relatively uniform, so that the pin can be pulled out without damage;

[0067] (2) Quick disassembly and assembly, specially used for MEMS detectors. When the detector is installed in the limit tube 2, the pin extraction groove on the pin can be aligned with the pin extraction screw 9, so that the pin can be quickly disassembled and the maintenance time can be reduced;

[0068] (3) Save manpower, the use of the driving screw 51 is more labor-saving, and the burden on the staff is reduced;

[0069] (4) Providing a clamping and positioning effect, the clamping force can be adjusted by controlling the lead screw 151, and the limiting grooves on the limiting block 13 and the pressing block 14 match the pin pulling cylinder 6, thereby realizing automatic centering of the pin pulling cylinder 6;

[0070] (5) The prismatic design of the pull rod 71 can provide greater friction, making it easier to screw the pull rod 7 in.

[0071] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in the present invention should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0072] In addition, the terms "first", "second", etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, the meaning of "plurality" is more than two, unless otherwise clearly and specifically defined.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A pin-pulling device for a marine exploration geophone, characterized in that: include: A support frame (1) plays a supporting role; A limiting cylinder (2) is arranged on the support frame (1), and the detector (100) can be inserted into the limiting cylinder (2); A clearance opening (3) is arranged on the limiting cylinder (2), and when the detector (100) is inserted into the limiting cylinder (2), one or more of the long pins (200) or the short pins (300) of the detector (100) can be aligned with the clearance opening (3); A support block (4) is slidably connected to the support frame (1), and the sliding direction of the support block (4) is perpendicular to the axial direction of the limiting cylinder (2); A driving member (5) is arranged on the support frame (1) and is used to control the sliding of the supporting block (4); A pin pulling cylinder (6) is arranged on the support block (4), the axial direction of the pin pulling cylinder (6) is perpendicular to the axial direction of the limiting cylinder (2), and the pin pulling cylinder (6) is aligned with the clearance opening (3); A pin pulling rod (7) is movably inserted in the pin pulling cylinder (6), and the pin pulling rod (7) and the pin pulling cylinder (6) are coaxially arranged; A limiting ring (8) is arranged at one end of the pin pulling cylinder (6) facing the limiting cylinder (2), and the limiting ring (8) is used to prevent the pin pulling rod (7) from moving toward the limiting cylinder (2); A pin pulling screw (9) is coaxially arranged at one end of the pin pulling rod (7) facing the limiting cylinder (2); the pin pulling screw (9) passes through the limiting ring (8) and is used for threaded connection with the pin pulling groove (400) on the long pin (200) or the short pin (300).

2. The pin pulling device according to claim 1, characterized in that: The limiting cylinder (2) is provided with a guide opening (10), the length direction of the guide opening (10) is parallel to the axial direction of the limiting cylinder (2), and the guide opening (10) is connected to the clearance opening (3) so that the long pin (200) can slide along the guide opening (10) and enter the clearance opening (3).

3. The pin pulling device according to claim 2, characterized in that: The clearance opening (3) is in the shape of an elongated strip, and the length direction of the clearance opening (3) is perpendicular to the axial direction of the limiting cylinder (2). When the long pin (200) enters the clearance opening (3), the detector (100) can rotate along its own axial direction and make the long pin (200) slide along the clearance opening (3); The arc corresponding to the clearance opening (3) is 90°, and the clearance opening (3) is parallel to the two inner side walls of the axial direction of the limiting tube (2) to form a first limiting surface (11) and a second limiting surface (12). When the long pin (200) abuts against the first limiting surface (11), the pin extraction groove (400) on the long pin (200) and the pin extraction screw (9) are aligned. When the long pin (200) abuts against the second limiting surface (12), the pin extraction groove (400) on the short pin (300) adjacent to the long pin (200) and the pin extraction screw (9) are aligned.

4. The pin pulling device according to claim 1, characterized in that: The support frame (1) comprises two support bases (101), the limiting cylinder (2) is fixed on one of the support bases (101), the two support bases (101) are connected by a pair of parallel guide rods (102), the axial direction of the guide rods (102) is perpendicular to the axial direction of the limiting cylinder (2), and the support block (4) is slidably matched with the pair of guide rods (102).

5. The pin pulling device according to claim 4, characterized in that: The driving member (5) comprises a driving screw (51) and a driving hand wheel (52); the driving screw (51) is located between a pair of the guide rods (102), and the driving screw (51) passes through the support block (4) and is threadedly engaged with the support block (4); one end of the driving screw (51) is rotatably connected to one of the support bases (101), and the other end is threadedly connected to the other support base (101); and the driving hand wheel (52) is fixed on the driving screw (51).

6. The pin pulling device according to claim 1, characterized in that: A limit block (13) and a clamping block (14) are provided on the support block (4); the pin pulling cylinder (6) is movably arranged between the limit block (13) and the clamping block (14); the limit block (13) is fixedly connected to the support block (4); the clamping block (14) is slidably connected to the support block (4); and the sliding direction of the clamping block (14) is perpendicular to the axial direction of the pin pulling cylinder (6); and a control member (15) for controlling the sliding of the clamping block (14) is provided on the support block (4) so ​​that the clamping block (14) and the limit block (13) can clamp the pin pulling cylinder (6) together.

7. The pin pulling device according to claim 6, characterized in that: The control member (15) comprises a control screw (151) and a control hand wheel (152); the control screw (151) is threadedly connected to the support block (4); one end of the control screw (151) is rotatably connected to the clamping block (14) and the other end is fixedly connected to the control hand wheel (152).

8. The pin pulling device according to claim 6, characterized in that: A circular arc-shaped positioning groove (16) is respectively provided on the side where the limiting block (13) and the pressing block (14) are close to each other, and the outer side wall of the limiting cylinder (2) matches the inner side wall of the positioning groove (16), so that the inner side walls of the two positioning grooves (16) can clamp the pin pulling cylinder (6) together.

9. The pin pulling device according to claim 6, characterized in that: A positioning ring (17) is provided at one end of the pin pulling cylinder (6) away from the limiting cylinder (2), and the side of the positioning ring (17) facing the limiting cylinder (2) can abut against the limiting block (13) and the pressing block (14) for limiting position.

10. The pin pulling device according to claim 1, characterized in that: The pin pulling rod (7) comprises a pulling rod (71) and a limiting nut (72), the screw rod of the pin pulling screw (9) passes through the limiting nut (72), the end of the limiting nut (72) is provided with a step groove (73) for the nut of the pin pulling screw (9) to be inserted, the pulling rod (71) is prismatic, and the end of the pulling rod (71) is provided with a mounting groove (74), the limiting nut (72) is threadedly connected to the mounting groove (74), and the nut of the pin pulling screw (9) is pressed against the bottom of the mounting groove (74).

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