Bulbous bow anchor pipe auxiliary marking and opening device and its using method

Abstract

The present application relates to the technical fields of anchor pipe scribing and opening, and to a bow plate anchor pipe auxiliary scribing and opening device, which comprises a steel needle body, a limiting mechanism for limiting the steel needle body is arranged on the steel needle body, a scribing mechanism for scribing the bow plate anchor pipe is arranged on the steel needle body, a fitting mechanism for pushing the scribing mechanism to always fit the bow plate is arranged on the steel needle body, a sleeve is slidably connected to the steel needle body, a scale is fixedly connected to the side wall of the sleeve, a limiting groove is formed on the front of the scale, and a anti-dropping cap is fixedly connected to the outer end of the scale. The bow plate anchor pipe auxiliary scribing and opening device is characterized in that the sleeve and the scale are connected to the steel needle body, the bottom end of the sliding sleeve connected to the scale is connected with a scribing needle, and the sliding sleeve is controlled and locked by the fourth locking bolt at the top end, so as to adjust the size of the scribing and opening of the anchor pipe.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of anchor pipe marking and opening, in particular to a bow plate anchor pipe auxiliary marking and opening device. BACKGROUND

[0002] The anchor pipe is a tubular device for guiding the anchor chain to enter and exit the anchor chain cabin on a ship, is usually a tubular structure welded by a steel plate, and can be arranged in a vertical or inclined form according to the position.

[0003] The prior art does not have the structure of auxiliary marking of the anchor pipe hole, so that the bow anchor pipe opening of the bulk cargo ship and the small oil tanker is usually carried out by using a template, the template needs to be separately laid out and manufactured according to the ship type and the anchor pipe size, and the wood template is generally used by the ship enterprises, the wood template has a certain weight due to the large size, and more than two persons are generally needed to cooperate in the actual opening process, one person holds the template to align with the reference line, and the other person marks the line according to the template contour, the template and the reference line cannot be shifted during the marking process, and the template needs to be marked in multiple sections due to the large size, so the time is long, and the working efficiency of the personnel is affected, based on the technical defects of the prior art, the bow plate anchor pipe auxiliary marking and opening device is designed. SUMMARY

[0004] The bow plate anchor pipe auxiliary marking and opening device has the advantages that the anchor pipe can be quickly and auxiliary marked.

[0005] The bow plate anchor pipe auxiliary marking and opening device provided by the application has the following technical scheme: a bow plate anchor pipe auxiliary marking and opening device comprises a steel needle body, a limiting mechanism for limiting the steel needle body is arranged on the steel needle body in a sleeving mode, a marking mechanism for marking the bow plate anchor pipe is arranged on the steel needle body in a sliding mode, and a fitting mechanism for fitting the marking mechanism with the bow plate at all times is arranged on the steel needle body.

[0006] The marking mechanism comprises a sleeve, a scale, a limiting groove, an anti-dropping cap, a sliding sleeve, a limiting sliding block, a fourth locking bolt, a scale window, an indicating mark and a marking needle, the sleeve is arranged on the steel needle body in a sliding sleeve mode, the scale is fixedly connected to the side wall of the sleeve, the limiting groove is formed in the front face of the scale, the anti-dropping cap is fixedly connected to the outer end of the scale, the sliding sleeve is arranged on the scale in a sliding sleeve mode, the limiting sliding block is fixedly connected to the inner wall of the sliding sleeve, the fourth locking bolt is threadedly connected to the top end of the sliding sleeve in a penetrating mode, the scale window is formed in the front face of the sliding sleeve, the indicating mark is fixedly connected to the front face of the sliding sleeve, and the marking needle is fixedly connected to the lower surface of the sliding sleeve.

[0007] As a preferred technical scheme of the present application, the limiting mechanism comprises a first limiting cover, a second limiting cover, a first connecting screw, a movable inner groove, a first locking bolt, a second locking bolt, a circular arc movable head, a positioning seat, a bottom groove and a magnetic seat, the first limiting cover is sleeved on the steel needle body, the second limiting cover is arranged on one side of the first limiting cover, the first connecting screw is threadedly connected on the first limiting cover and the second limiting cover, the movable inner groove is arranged in the first limiting cover and the second limiting cover, the first locking bolt is threadedly connected through the side wall of the first limiting cover, the second locking bolt is threadedly connected through the side wall of the second limiting cover, the circular arc movable head is rotationally connected in the movable inner groove, the positioning seat is fixedly connected at the bottom of the circular arc movable head, the bottom groove is arranged at the bottom of the positioning seat, the magnetic seat is fixedly connected in the bottom groove, and the fixing screw is connected through the magnetic seat.

[0008] As a preferred technical scheme of the present application, the fitting mechanism comprises a bottom push plate, a positioning block, a top push plate, a third locking bolt and a spring, the bottom push plate is fixedly connected to the upper surface of the sleeve, the positioning block is sleeved on the steel needle body above the sleeve, the top push plate is fixedly connected to the lower surface of the positioning block, the third locking bolt is threadedly connected through the side wall of the positioning block, and the spring is fixedly connected between the bottom push plate and the top push plate.

[0009] As a preferred technical scheme of the present application, the limiting sliding block is slidingly connected in the limiting groove, and the inner end of the fourth locking bolt is in contact with the upper surface of the scale.

[0010] As a preferred technical scheme of the present application, the scale window is slidingly connected outside the scale line of the scale, and the indicating mark is arranged below the scale window.

[0011] As a preferred technical scheme of the present application, the circular arc movable head and the positioning seat are movably sleeved on the steel needle body, the inner end of the first locking bolt is in contact with the circular arc movable head, and the inner end of the second locking bolt is in contact with the side wall of the steel needle body.

[0012] As a preferred technical scheme of the present application, the top end of the fixing screw is threadedly connected to the top of the inner cavity of the bottom groove, and the magnetic seat is sleeved on the steel needle body.

[0013] As a preferred technical scheme of the present application, the inner end of the third locking bolt is in contact with the side wall of the steel needle body.

[0014] As a preferred technical scheme of the present application, the spring is sleeved on the steel needle body.

[0015] The use method of the bow plating anchor pipe auxiliary scribing and opening device comprises the following steps:

[0016] S1: first in the bow plate on the opening with the steel needle body diameter equal hole, and the steel needle body through the bow plate, the tip of the steel needle body against the center point of the deck hole after the limit mechanism on the steel needle body slip make it with the bow plate magnetic attraction steel needle body fixed;

[0017] S2: then sleeve, scale and fit mechanism on the steel needle body, and according to the diameter of the anchor pipe adjusting sliding sleeve and scribe needle on the corresponding scale;

[0018] S3: finally make scribe needle tip and the bow plate contact and press the positioning block and push plate compression spring lock third locking bolt, after locking 360 ° rotation scale and sleeve with scribe needle on the bow plate scribe, during the fit mechanism according to the plate line to push the sleeve driven scribe needle tip always with the bow plate fit scribe.

[0019] Compared with the prior art, the present application has the following beneficial effects:

[0020] 1. The bow plate anchor pipe auxiliary line opening device, by the steel needle body according to the preset complete fixed after the sleeve, scale and fit mechanism from the outer end of the steel needle body inserted and make the scribe needle tip and the bow plate contact, then loosen the fourth locking bolt so that its inner end does not contact with the scale to release the locking of the sliding sleeve, at this time, according to the required anchor pipe hole radius length left and right adjustment sliding sleeve, until from the sliding sleeve on the scale window to observe the corresponding scale value and the index also points to the value, the scribe needle can complete the adjustment, tighten the fourth locking bolt to lock the position of the sliding sleeve and scribe needle, then loosen the third locking bolt to press the positioning block a certain distance to make the positioning block push the push plate compression spring, then tighten the third locking bolt, finally drive the sleeve and scale driven scribe needle 360 ° rotation, make the scribe needle tip always with the bow plate fit and rotate scribe under the push of the spring, the device can be used for the bow plate anchor pipe line opening.

[0021] 2. The auxiliary marking and hole-making device for the bow outer plate anchor chain pipe is firstly made by making a hole with the same diameter as the steel needle body on the bow outer plate, and passing the steel needle body through the bow outer plate so that the tip of the steel needle body is against the center point of the circular hole on the deck, and then loosening the first locking bolt and the second locking bolt and sleeve the first limiting cover, the second limiting cover, the circular arc movable head, the positioning seat and the magnetic seat on the steel needle body. At this time, the first limiting cover, the second limiting cover, the circular arc movable head and the positioning seat are moved to make the magnetic seat slowly move close to the bow outer plate. In this process, according to the steel needle body and the positioning seat, the magnetic seat is moved. The angle of the bow outer plate is adjusted by rotating the arc movable head and the movable inner groove to adjust the angle of the positioning seat so that it remains roughly flush with the bow outer plate until the magnetic seat moves to fit with the bow outer plate. Finally, the first locking bolt is turned to make its inner end contact with the arc movable head to fix the angles of the first limit cover, the second limit cover, the arc movable head and the positioning seat. At the same time, the second locking bolt is turned to make its inner end contact with the steel needle body to lock the steel needle body with the first limit cover and the second limit cover to complete the fixation. This device is convenient for fixing the steel needle body. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the rear view of the main body of the hole marking device of the present invention;

[0024] Figure 3 This is a schematic diagram of the explosion structure of the limiting mechanism of the present invention;

[0025] Figure 4 This is a schematic diagram of the explosion structure of the limiting mechanism of the present invention when viewed from above;

[0026] Figure 5 This is a schematic diagram of the exploded structure of the scribing mechanism of the present invention;

[0027] Figure 6 It is a schematic diagram of the connection structure between the scribing mechanism and the laminating mechanism of the present invention.

[0028] In the figure: 1. Steel needle body; 2. Limiting mechanism; 201. First limiting cover; 202. Second limiting cover; 203. First connecting screw; 204. Movable inner groove; 205. First locking bolt; 206. Second locking bolt; 207. Arc movable head; 208. Positioning seat; 209. Bottom groove; 210. Magnetic seat; 211. Fixing screw; 3. Fitting mechanism; 301. Bottom push plate; 302. Positioning block; 303. Top push plate; 304. Third locking bolt; 305. Spring; 4. Marking mechanism; 401. Sleeve; 402. Scale; 403. Limiting groove; 404. Anti-drop cap; 405. Sliding sleeve; 406. Limiting slider; 407. Fourth locking bolt; 408. Scale window; 409. Indicator mark; 410. Marking needle. DETAILED DESCRIPTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0030] See also Figures 1-6 The auxiliary marking and hole-opening device for the bow outer plate anchor chain pipe comprises a steel needle body 1, a limiting mechanism 2 is sleeved on the steel needle body 1 for facilitating the limiting of the steel needle body 1, a marking mechanism 4 is slidingly provided on the steel needle body 1 for facilitating the marking of the bow outer plate anchor chain pipe, and a fitting mechanism 3 is provided on the steel needle body 1 for facilitating pushing the marking mechanism 4 to always fit with the bow outer plate.

[0031] See also Figures 5-6 , marking mechanism 4, marking mechanism 4 includes a sleeve 401, a scale 402, a limiting groove 403, an anti-drop cap 404, a sliding sleeve 405, a limiting slider 406, a fourth locking bolt 407, a scale window 408, an indicator 409 and a marking needle 410, the sleeve 401 is slidably sleeved on the steel needle body 1, the scale 402 is fixedly connected to the side wall of the sleeve 401, the limiting groove 403 is opened on the front of the scale 402, the anti-drop cap 404 is fixedly connected to the outer end of the scale 402, the sliding sleeve 405 is slidably sleeved on the scale 402, and the limiting slider 406 is fixed The fourth locking bolt 407 is fixedly connected to the inner wall of the sliding sleeve 405, the fourth locking bolt 407 is threadedly connected to the top of the sliding sleeve 405, the scale window 408 is opened on the front of the sliding sleeve 405, the indicator mark 409 is fixedly connected to the front of the sliding sleeve 405, the marking needle 410 is fixedly connected to the lower surface of the sliding sleeve 405, the limiting slider 406 is slidably connected to the inside of the limiting groove 403, the inner end of the fourth locking bolt 407 is in contact with the upper surface of the scale 402, the scale window 408 is slidably connected to the outside of the scale line of the scale 402, and the indicator mark 409 is arranged below the scale window 408.

[0032] By setting the sleeve 401, the scale 402, the sliding sleeve 405 and the marking needle 410, the marking needle 410 can be rotated on the steel needle body 1 to rotate and mark the bow outer plate. By setting the scale window 408 and the indicator mark 409, the positions of the sliding sleeve 405 and the marking needle 410 on the scale 402 can be adjusted according to the radius of the opening. By setting the fourth locking bolt 407, the positions of the sliding sleeve 405 and the marking needle 410 after adjustment can be locked. By setting the limiting groove 403 and the limiting slider 406, the stability of the sliding sleeve 405 during sliding adjustment and marking can be improved.

[0033] Please refer to Figures 3-4 , the limiting mechanism 2 comprises a first limiting cover 201, a second limiting cover 202, a first connecting screw 203, a movable inner groove 204, a first locking bolt 205, a second locking bolt 206, a circular arc movable head 207, a positioning seat 208, a bottom groove 209 and a magnetic seat 210, the first limiting cover 201 is sleeved and arranged on the steel needle body 1, the second limiting cover 202 is arranged on one side of the first limiting cover 201, the first connecting screw 203 is threadedly connected on the first limiting cover 201 and the second limiting cover 202, the movable inner groove 204 is opened in the inside of the first limiting cover 201 and the second limiting cover 202, the first locking bolt 205 is threadedly connected through the side wall of the first limiting cover 201, the second locking bolt 206 is threadedly connected through the side wall of the second limiting cover 202, the circular arc movable head 207 is rotatably connected in the inside of the movable inner groove 204, the positioning seat 208 is fixedly connected at the bottom of the circular arc movable head 207, the bottom groove 209 is opened at the bottom of the positioning seat 208, the magnetic seat 210 is fixedly connected in the inside of the bottom groove 209, the fixed screw 211 is connected through the magnetic seat 210, the circular arc movable head 207 and the positioning seat 208 are movably sleeved on the steel needle body 1, the inner end of the first locking bolt 205 is in contact with the circular arc movable head 207, the inner end of the second locking bolt 206 is in contact with the side wall of the steel needle body 1, the top end of the fixed screw 211 is threadedly connected at the top of the inner cavity of the bottom groove 209, and the magnetic seat 210 is sleeved and arranged on the steel needle body 1.

[0034] By arranging the first limiting cover 201 and the second limiting cover 202, and arranging the second locking bolt 206 on the second limiting cover 202, the steel needle body 1 can be connected and fixed with the first limiting cover 201 and the second limiting cover 202, by arranging the movable inner groove 204, the circular arc movable head 207, the positioning seat 208 and the magnetic seat 210, after the steel needle body 1 is inserted into the opening of the bow plate, the magnetic seat 210 can be rotated at multiple angles under the action of the circular arc movable head 207 and the movable inner groove 204 to be attached to the bow plate, thereby assisting the first limiting cover 201 and the second limiting cover 202 to limit and fix the steel needle body 1.

[0035] Please refer to Figure 6 , the attaching mechanism 3 comprises a bottom push plate 301, a positioning block 302, a top push plate 303, a third locking bolt 304 and a spring 305, the bottom push plate 301 is fixedly connected to the upper surface of the sleeve 401, the positioning block 302 is sleeved and arranged on the steel needle body 1 above the sleeve 401, the top push plate 303 is fixedly connected to the lower surface of the positioning block 302, the third locking bolt 304 is threadedly connected through the side wall of the positioning block 302, the spring 305 is fixedly connected between the bottom push plate 301 and the top push plate 303, the inner end of the third locking bolt 304 is in contact with the side wall of the steel needle body 1, and the spring 305 is sleeved and arranged on the steel needle body 1.

[0036] By setting the bottom push plate 301, the top push plate 303 and the spring 305, the tip of the scribe needle 410 can always be in contact with the bow plate to perform scribing work. By setting the positioning block 302 and the third locking bolt 304, the compression of the spring 305 can be adjusted according to the position of the scribing mechanism 4, preventing the spring 305 from being unable to push the bottom push plate 301 to make the scribing mechanism 4 move down to fit the scribing due to large curvature.

[0037] Please refer to Figures 1-6 , the use method of the bow plate anchor pipe auxiliary scribing opening device, including the following steps:

[0038] S1: First, a hole with the same diameter as the steel needle body 1 is opened on the bow plate, and the steel needle body 1 is inserted through the bow plate, and the tip of the steel needle body 1 is placed at the center point of the deck hole. After the limiting mechanism 2 is sleeved on the steel needle body 1 and slides, it is magnetically attracted to the steel needle body 1 to fix it.

[0039] S2: Then sleeve 401, scale 402 and fitting mechanism 3 are sleeved on steel needle body 1, and the corresponding scale of slide sleeve 405 and scribe needle 410 on scale 402 is adjusted according to the diameter of anchor pipe;

[0040] S3: Finally, the tip of the scribe needle 410 is in contact with the bow plate, and the positioning block 302 and the top push plate 303 are pressed to compress the spring 305 and lock the third locking bolt 304. After locking, rotate the scale 402 and the sleeve 401 by 360°, and use the scribe needle 410 to scribe on the bow plate. During this period, the fitting mechanism 3 pushes the sleeve 401 to drive the tip of the scribe needle 410 to always fit the bow plate for scribing.

[0041] Working principle: when the auxiliary marking and hole opening device for the bow outer plate anchor chain pipe is used, in the initial state, the sleeve 401 and the scale 402 are sleeved on the steel needle body 1, and the bottom end of the sliding sleeve 405 sliding on the scale 402 is connected with the marking needle 410, and the sliding sleeve 405 is locked by the fourth locking bolt 407 at the top, so as to adjust the size of the marking hole of the anchor chain pipe, and the first limiting cover 201 and the second limiting cover 202 sleeved on the steel needle body 1 are connected by the first connecting screw 203. A circular arc movable head 207 is provided in the movable inner groove 204 opened in the cover 202. A positioning seat 208 is provided at the bottom of the circular arc movable head 207. At the same time, a magnetic seat 210 is installed inside the positioning seat 208 to limit the position of the steel needle body 1. At the same time, the top of the sleeve 401 is fixedly connected to the bottom push plate 301 and connected to the top push plate 303 through the spring 305. The upper surface of the top push plate 303 is provided with a positioning block 302 and a third locking bolt 304 to facilitate pushing the marking mechanism 4 downward so that the marking needle 410 is always in contact with the bow outer plate and marks;

[0042] When it is necessary to mark and drill a hole for the anchor chain pipe on the bow outer plate, first, after the steel needle body 1 is fixed as preset, the sleeve 401, the scale 402 and the fitting mechanism 3 are inserted from the outer end of the steel needle body 1 and the tip of the marking needle 410 is brought into contact with the bow outer plate. Then, the fourth locking bolt 407 is loosened so that its inner end is not in contact with the scale 402 to release the lock on the sleeve 405. At this time, the sleeve 405 is adjusted left and right according to the required radius length of the anchor chain pipe hole until the corresponding scale value on the scale 402 is observed from the scale window 408 opened on the sleeve 405 and the indicator 409 also points to the number. When the value is set, the marking needle 410 can complete the adjustment by tightening the fourth locking bolt 407 to lock the position of the sliding sleeve 405 and the marking needle 410, then loosen the third locking bolt 304 and press the positioning block 302 downward for a certain distance so that the positioning block 302 pushes the push plate 303 to compress the spring 305, and then tighten the third locking bolt 304. Finally, move the sleeve 401 and the scale 402 to drive the marking needle 410 to rotate 360°, so that the tip of the marking needle 410 is always in contact with the bow outer plate under the push of the spring 305 and rotates to mark. This device is convenient for marking and opening holes for anchor chain pipes on the bow outer plate.

[0043] When the steel needle body 1 needs to be fixed, first, a hole with the same diameter as the steel needle body 1 is opened on the bow plate, and the steel needle body 1 is passed through the bow plate so that the tip of the steel needle body 1 is against the center point of the deck hole, then the first locking bolt 205 and the second locking bolt 206 are loosened, and the first limiting cover 201, the second limiting cover 202, the arc movable head 207, the positioning seat 208 and the magnetic seat 210 are sleeved on the steel needle body 1, at this time, the first limiting cover 201, the second limiting cover 202, the arc movable head 207 and the positioning seat 208 are moved to slowly move the magnetic seat 210 close to the bow plate, in this process, according to the angle between the steel needle body 1 and the bow plate, the angle of the positioning seat 208 is adjusted by rotating the arc movable head 207 and the movable inner groove 204 so that it is approximately flush with the bow plate, until the magnetic seat 210 moves to fit the bow plate, finally, the first locking bolt 205 is tightened to contact the inner end with the arc movable head 207 to fix the angle of the first limiting cover 201, the second limiting cover 202, the arc movable head 207 and the positioning seat 208, at the same time, the second locking bolt 206 is tightened to contact the inner end with the steel needle body 1 to lock the steel needle body 1 between the first limiting cover 201 and the second limiting cover 202, and the fixing is completed, the device is convenient for fixing the steel needle body 1.

[0044] It should be noted that, in this document, the terms such as first and second are used merely to distinguish one entity or action from another, and do not necessarily require or imply that these entities or actions are in any way mutually exclusive or in any way arranged in any sequence.

[0045] Although the embodiments of the present application have been shown and described, it is understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An auxiliary marking and hole-opening device for a bow outer plate anchor chain pipe, comprising a steel needle body (1), characterized in that: The steel needle body (1) is sleeved with a limiting mechanism (2) for facilitating the limiting of the steel needle body (1), the steel needle body (1) is slidably provided with a marking mechanism (4) for facilitating marking the anchor chain pipe of the bow outer plate, and the steel needle body (1) is provided with a fitting mechanism (3) for facilitating pushing the marking mechanism (4) to always fit with the bow outer plate; A marking mechanism (4), the marking mechanism (4) comprising a sleeve (401), a scale (402), a limiting groove (403), an anti-drop cap (404), a sliding sleeve (405), a limiting slider (406), a fourth locking bolt (407), a scale window (408), an indicator (409) and a marking needle (410), the sleeve (401) being slidably sleeved on the steel needle body (1), the scale (402) being fixedly connected to the side wall of the sleeve (401), and the limiting groove (403) being provided on the front face of the scale (402). The anti-drop cap (404) is fixedly connected to the outer end of the scale (402), the sliding sleeve (405) is slidably sleeved on the scale (402), the limiting slider (406) is fixedly connected to the inner wall of the sliding sleeve (405), the fourth locking bolt (407) is threadedly connected to the top of the sliding sleeve (405), the scale window (408) is opened on the front of the sliding sleeve (405), the indicator (409) is fixedly connected to the front of the sliding sleeve (405), and the marking needle (410) is fixedly connected to the lower surface of the sliding sleeve (405); The limiting mechanism (2) comprises a first limiting cover (201), a second limiting cover (202), a first connecting screw (203), a movable inner groove (204), a first locking bolt (205), a second locking bolt (206), an arc movable head (207), a positioning seat (208), a bottom groove (209), a magnetic seat (210) and a fixing screw (211), wherein the first limiting cover (201) is sleeved on the steel needle body (1), the second limiting cover (202) is arranged on one side of the first limiting cover (201), the first connecting screw (203) is threadedly connected to the first limiting cover (201) and the second limiting cover (202), the movable inner groove (204) is screwed to the first limiting cover (201) and the second limiting cover (202), and the movable inner groove (204) is screwed to the second limiting cover (202). ) are provided inside the first limiting cover (201) and the second limiting cover (202), the first locking bolt (205) is threadedly connected to the side wall of the first limiting cover (201), the second locking bolt (206) is threadedly connected to the side wall of the second limiting cover (202), the arc movable head (207) is rotatably connected to the inside of the movable inner groove (204), the positioning seat (208) is fixedly connected to the bottom of the arc movable head (207), the bottom groove (209) is provided at the bottom of the positioning seat (208), the magnetic seat (210) is fixedly connected to the inside of the bottom groove (209), and the fixing screw (211) is threadedly connected to the magnetic seat (210).

2. The auxiliary marking and hole-making device for the bow outer plate anchor chain pipe according to claim 1, characterized in that: The fitting mechanism (3) includes a bottom push plate (301), a positioning block (302), a top push plate (303), a third locking bolt (304) and a spring (305), wherein the bottom push plate (301) is fixedly connected to the upper surface of the sleeve (401), the positioning block (302) is sleeved on the steel needle body (1) above the sleeve (401), the top push plate (303) is fixedly connected to the lower surface of the positioning block (302), the third locking bolt (304) is threadedly connected to the side wall of the positioning block (302), and the spring (305) is fixedly connected between the bottom push plate (301) and the top push plate (303).

3. The auxiliary marking and hole-making device for the bow outer plate anchor chain pipe according to claim 1, characterized in that: The limiting slider (406) is slidably connected to the inside of the limiting groove (403), and the inner end of the fourth locking bolt (407) is in contact with the upper surface of the scale (402).

4. The auxiliary marking and hole-making device for the bow outer plating anchor chain pipe according to claim 1, characterized in that: The scale window (408) is slidably connected to the outside of the scale line of the scale ruler (402), and the indicator (409) is arranged below the scale window (408).

5. The auxiliary marking and hole-making device for the bow outer plating anchor chain pipe according to claim 1, characterized in that: The arc movable head (207) and the positioning seat (208) are movably sleeved on the steel needle body (1), the inner end of the first locking bolt (205) is in contact with the arc movable head (207), and the inner end of the second locking bolt (206) is in contact with the side wall of the steel needle body (1).

6. The auxiliary marking and hole-making device for the bow outer plating anchor chain pipe according to claim 1, characterized in that: The top end of the fixing screw (211) is threadedly connected to the top of the inner cavity of the bottom groove (209), and the magnetic seat (210) is sleeved and arranged on the steel needle body (1).

7. The auxiliary marking and hole-making device for the bow outer plating anchor chain pipe according to claim 2, characterized in that: The inner end of the third locking bolt (304) contacts the side wall of the steel needle body (1).

8. The auxiliary marking and hole-making device for the bow outer plating anchor chain pipe according to claim 2, characterized in that: The spring (305) is sleeved and arranged on the steel needle body (1).

9. The method for using the auxiliary marking and hole-making device for the bow outer plate anchor chain pipe according to claim 1 is characterized in that: The following steps are involved: S1: First, a hole with a diameter equal to that of the steel needle body (1) is opened on the bow outer plate, and the steel needle body (1) is passed through the bow outer plate so that the tip of the steel needle body (1) is against the center point of the circular hole on the deck, and then the limiting mechanism (2) is put on the steel needle body (1) and slid so that it is magnetically attracted to the bow outer plate to fix the steel needle body (1); S2: Then, the sleeve (401), the scale (402) and the fitting mechanism (3) are sleeved on the steel needle body (1), and the sliding sleeve (405) and the marking needle (410) are adjusted to the corresponding scales on the scale (402) according to the diameter of the hawse pipe; S3: Finally, the tip of the marking needle (410) is brought into contact with the bow outer plate and the positioning block (302) and the push plate (303) are pressed down to compress the spring (305) and lock the third locking bolt (304). After locking, the scale (402) and the sleeve (401) are rotated 360 degrees to mark the bow outer plate using the marking needle (410). During this period, the fitting mechanism (3) pushes the sleeve (401) according to the outer plate line to drive the tip of the marking needle (410) to always fit the bow outer plate and mark the line.

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