A method for installing stern skid boat rollers during the dock phase

Abstract

This invention discloses a method for installing stern skid boat rollers during the dock stage. This method advances the installation of stern skid boat rollers, which were originally installed during the mooring trial stage, to the dock stage, transforming the original water-based operation into a ground-based operation. This effectively solves the safety risks associated with water-based operations. Furthermore, since the ground-based operation is carried out during the dock stage, there is no need to construct a simulated boat, eliminating the risk of the simulated boat capsizing. Only a bilge auxiliary installation fixture needs to be constructed to install the bilge inclined rollers. The horizontal rollers can be installed according to the marked position of the stern gate centerline, which can greatly shorten the installation cycle. The cycle length is fixed and controllable, while also reducing labor intensity.

Description

Technical Field

[0001] This invention relates to the field of stern skid boat roller installation technology, and more particularly to a method for installing stern skid boat rollers during the dock stage. Background Technology

[0002] Stern-slip boats, also known as stern-slipway boats, are mainly used in marine operations and rescue operations, requiring high efficiency, safety, and rapid response. With the development and advancement of shipbuilding technology, stern-slip boats are widely used in various types of vessels.

[0003] Traditional ships typically use cranes and lifeboat launch and recovery systems to deploy and retrieve small boats. However, these methods have significant drawbacks, including complex operation, slow deployment and recovery times, poor safety, and weak resistance to wind and waves. To overcome these shortcomings, the stern-skid small boat launch and recovery system has emerged.

[0004] Stern skid-mounted dinghy launching and recovery systems are typically located on a stern skid ramp, using a launching and recovery device to allow dinghys to quickly and safely enter and exit the ship's cabin. Current technology usually utilizes a simulated dinghy to install the bilge rollers on the ramp. During mooring trials, a simulated dinghy is hoisted onto the ship and installed on the ramp, its position mirroring that of the actual dinghy installed on the final ship. The roller assembly is then installed using the simulated dinghy as a reference. Because this installation method is performed during the mooring trials, after the ship has been launched, this work is considered waterborne operation, presenting significant challenges and safety hazards. Furthermore, the dinghy occupies a large portion of the space, making construction extremely inconvenient. Summary of the Invention

[0005] In view of this, the present invention provides a method for installing stern skid boat rollers during the dock stage, in order to solve the problems existing in the background art.

[0006] A method for installing stern skid boat rollers during the dock stage specifically includes the following steps:

[0007] S1, dock stage: Place the stern sliding door on the ground and adjust it to be level to reflect the open state after it is installed on the ship.

[0008] S2, Draw the center line of the tailgate on the surface of the tailgate;

[0009] S3. According to the installation position required by the roller installation drawing, install multiple horizontal rollers at equal intervals in the slide rail of the tail door along the center line of the tail door. The first horizontal roller is set at a position 150±2mm away from the tail end plate of the tail door. At the same time, guide rollers are installed on the tail end plate of the tail door.

[0010] S4. Using the installed horizontal rollers as a reference, install the bilge inclined rollers between the front and rear horizontal rollers using the bilge auxiliary installation fixture.

[0011] The bilge auxiliary installation fixture includes a template for simulating the outer plate shape of the stern slipway type boat and an adjustment base fixed to the bottom of the template for adjusting the vertical height of the template.

[0012] S5, Install a hinge on the first sealing plate of the tail slide door and install a hanging ring on the tail sealing plate of the tail slide door;

[0013] S6. Using lifting equipment, the stern sliding door is flipped 90° so that its stern end plate faces upward and its bow end plate faces downward. Then, it is lifted onto the ship in a vertical position, and the hinges on the bow end plate of the stern sliding door are fixed to the hinges on the stern end plate of the hull structure.

[0014] S7. Use the lifting equipment to open the stern sliding door, and then install the horizontal rollers and bilge rollers on the hull slideway in the same way as the horizontal rollers and bilge rollers on the stern sliding door.

[0015] S8. After the ship is launched, once the stern slipway-type ship-borne small boat is installed on the hull slipway, the bow inclined roller is installed at the bow of the hull slipway.

[0016] Preferably, the specific steps in step S1 of placing the tailgate on the ground and adjusting it to be level are as follows:

[0017] The tailgate is placed flat on the ground using a support structure;

[0018] Select multiple measurement points on the bottom surface of the tail slide gate track, and use a total station or spirit level to measure the levelness of each measurement point. Adjust the tail slide gate according to the measurement results to ensure that the bottom surface of its track is level.

[0019] Preferably, in step S3, after the horizontal rollers are installed, the centers of all the horizontal rollers must be at the same height, and the line connecting the centers of all the horizontal rollers must be aligned vertically with the center line of the tailgate.

[0020] Preferably, the distance from the upper surface of the horizontal roller to the bottom surface of the slide rail of the tailgate is 200±2mm.

[0021] Preferably, the specific steps in step S4 for installing the bilge inclined rollers between the front and rear horizontal rollers using the bilge auxiliary installation fixture are as follows:

[0022] According to the installation positions of the bilge rollers in the construction drawings, fix the auxiliary installation fixtures for the bilge at the corresponding positions on the bottom surface of the slide between the front and rear horizontal rollers;

[0023] The height of the template is adjusted by adjusting the base of the bilge auxiliary installation fixture so that the bottom surface of the template is flush with the upper surface of the horizontal roller.

[0024] Then, based on the distance between the inclined surface of the tail slide door and the linear inclined side of the template, the allowance of the roller bracket of the bilge roller is cut to make allowance.

[0025] Then, the remaining bilge rollers, after being cut off, are installed onto the inclined surface of the tail slide door track.

[0026] Preferably, multiple adjustment bases are provided, and the multiple adjustment bases are symmetrically fixed at the bottom of the template. Each adjustment base includes a base plate, a fixed connecting seat, and adjustment bolts connected to the base plate and the fixed connecting seat respectively. The fixed connecting seat is fixed to the template by fastening bolts.

[0027] Preferably, the template is a wooden board, and the outline of the two sides of the template is the same as the outline of the outer plate of the tail slide type boat.

[0028] Preferably, the bilge rollers refer to the rollers that contact the middle and stern of the stern slipway-type boat, and the bow rollers refer to the rollers that contact the bow of the stern slipway-type boat.

[0029] Preferably, in step S7, the specific steps for opening the tail slide door to a horizontal position using lifting equipment are as follows:

[0030] Secure the lifting lugs to the reverse side of the main deck of the hull;

[0031] Fix one end of the hand chain hoist to the lifting lug on the opposite side of the main deck and the other end to the lifting ring on the tail end plate of the stern sliding door. After the hand chain hoist is fixed, the hook of the lifting equipment is released.

[0032] Use a hand-operated hoist to open the tail slide door until the bottom of its track is level.

[0033] The beneficial effects of this invention are:

[0034] 1. This invention advances the installation of the stern skid pulley, which was originally installed during the mooring test phase, to the dock phase, transforming the original water-based operation into a ground-based operation. This effectively solves the safety risks associated with water-based operations. Furthermore, by performing ground-based operations in the dock phase, there is no need to construct a simulated skid, eliminating the risk of the simulated skid capsizing. Only a bilge auxiliary installation fixture needs to be constructed to install the bilge inclined rollers. The horizontal rollers can be installed according to the marked position of the stern gate centerline, which can greatly shorten the installation cycle. The cycle length is fixed and controllable, while also reducing labor intensity.

[0035] 2. The method of the present invention is not limited by the size of the site when installing rollers, and the auxiliary installation fixture of the bilge part has a simple structure and is easy to use and operate. While ensuring the installation accuracy of the rollers, it can greatly improve the installation efficiency of the rollers. Attached Figure Description

[0036] To more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a side view of the tailgate supported on the ground.

[0038] Figure 2 This is a schematic diagram of the end face where horizontal rollers are installed on the tailgate.

[0039] Figure 3 This is a schematic diagram of the end face of the bilge rollers installed using the bilge auxiliary installation fixture.

[0040] Figure 4 This is a structural diagram of the auxiliary installation fixtures for the bilge.

[0041] Figure 5 This is a diagram showing all rollers installed after the stern sliding door is installed.

[0042] The labels in the diagram mean:

[0043] 1 is the supporting structure; 2 is the stern sliding door; 3 is the bottom surface of the stern sliding door track; 4 is the inclined surface of the stern sliding door track; 5 is the pad block; 6 is the center line of the stern door; 7 is the horizontal roller on the stern sliding door; 8 is the guide roller; 9 is the bilge roller on the stern sliding door; 10 is the template; 11 is the base plate; 12 is the fixed connecting seat; 13 is the adjusting bolt; 14 is the hinge; 15 is the lifting ring; 16 is the bow sealing plate of the stern sliding door; 17 is the stern sealing plate of the stern sliding door; 18 is the horizontal roller on the hull track; 19 is the bilge roller on the hull track; 20 is the bow roller. Detailed Implementation

[0044] To make the objectives, technical solutions, and advantages of this invention clearer, the invention is described below with reference to specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0045] The terminology used in this disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting of the disclosure. The singular forms “a,” “the,” and “the” as used in this disclosure and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used herein refers to and includes any and all possible combinations of one or more of the associated listed items.

[0046] To better understand the technical solution of the present invention, the present invention will be described in detail below with reference to the accompanying drawings.

[0047] This invention provides a method for installing stern skid boat rollers during the dock stage, specifically including the following steps:

[0048] S1, the dock stage, places the stern sliding door on the ground and adjusts it to be level to reflect its open state after it is installed on the ship.

[0049] Specifically, firstly, such as Figure 1 As shown, the tail slide door 2 is placed on a flat ground by the support structure 1. The support structure can be a support platform, a pier, etc.

[0050] Then, select multiple measurement points on the bottom surface 3 of the slide rail of the tail slide door 2. The measurement points can be located at the four corners of the bottom surface 3 of the slide rail. Use a total station or a spirit level to measure the levelness of each measurement point. When using a total station, measure the three-dimensional coordinates of each measurement point. Adjust the levelness of the tail slide door 2 according to the three-dimensional coordinates of each measurement point. That is, adjust its levelness by inserting a pad 5 between the support structure 1 and the tail slide door 2. When using a spirit level, place the spirit level at each measurement point and adjust its levelness by inserting a pad 5 between the support structure 1 and the tail slide door 2 so that the bottom surface 3 of the slide rail is level.

[0051] The levelness deviation of the bottom surface 3 of the tail slide door track shall not exceed ±2mm.

[0052] It should be noted that when the tail slide door 2 is placed directly on the ground, the bottom surface 3 of its slide is tilted and not in a horizontal state. Therefore, the bottom surface 3 of the slide needs to be adjusted to a horizontal state before installing the rollers.

[0053] S2, draw the center line of the tailgate on the surface of the tailgate 2.

[0054] S3. According to the installation position required by the roller installation drawing, install multiple horizontal rollers 7 at equal intervals in the slide rail of the tailgate 2 along the center line 6 of the tailgate. The first horizontal roller is set at a position 150±2mm away from the tail end plate of the tailgate. After all the horizontal rollers 7 are installed, the roller centers of all the horizontal rollers 7 must be at the same height, and the line connecting the roller centers of all the horizontal rollers 7 must be aligned vertically with the center line 6 of the tailgate. That is, all the horizontal rollers 7 are located on the center line 6 of the tailgate and are set at the same height.

[0055] Meanwhile, guide rollers 8 are installed on the rear sealing plate of the tail sliding door.

[0056] After all the horizontal rollers 7 are installed, the distance from the upper surface of all the horizontal rollers 7 to the bottom surface 3 of the slide rail of the tail slide door is 200±2mm.

[0057] S4. Using the installed horizontal rollers as a reference, install the bilge inclined rollers 9 between the front and rear horizontal rollers 7 using the bilge auxiliary installation fixture.

[0058] The auxiliary installation fixture for the bilge includes a template 10 for simulating the outer plate shape of a stern slipway-type boat and an adjustment base fixed to the bottom of the template 10 for adjusting the vertical height of the template 10.

[0059] Multiple adjustment bases are provided, and multiple adjustment bases are symmetrically fixed at the bottom of the template. Each adjustment base includes a base plate 11, a fixed connecting seat 12, and adjustment bolts 13 that are respectively connected to the base plate 11 and the fixed connecting seat 12. The fixed connecting seat 12 is fixed to the template 10 by fastening bolts.

[0060] The fixed connecting seat 12 mainly serves as a connection and support. It can be configured in various structural forms. In this embodiment, the fixed connecting seat 12 is configured as an L-shaped structure, which consists of a vertically arranged angle steel and a horizontal steel plate fixed to the bottom of the angle steel. The upper part of the angle steel is fixed to the template by fastening bolts, and the bottom of the angle steel is welded to the horizontal steel plate. The horizontal steel plate is connected to the base plate by adjusting bolts. By adjusting the adjusting bolts, the upper and lower positions of the template can be adjusted.

[0061] In this embodiment, the template 10 is a wooden board, and the outline of the two sides of the template 10 is the same as the outline of the outer plate of the tail slide type boat.

[0062] When using the bilge auxiliary installation fixture to install the bilge inclined roller 9 between the front and rear horizontal rollers 7, firstly, according to the installation position of the bilge inclined roller 9 in the construction drawings, fix the bilge auxiliary installation fixture at the corresponding position on the bottom surface of the slide between the front and rear horizontal rollers 7.

[0063] Then, the height of the template 10 is adjusted by adjusting the base of the bilge auxiliary installation fixture so that the bottom surface of the template 10 is flush with the upper wheel surface of the horizontal roller 7.

[0064] Then, based on the distance between the inclined surface 4 of the tail slide door and the linear inclined side of the template 10, the allowance on the roller bracket of the bilge roller 9 is cut to make allowance. That is, after the allowance is cut, the size of the bilge roller 9 should be able to match the distance between the inclined surface of the tail slide door and the linear inclined side of the template, so as to ensure that the wheel surface of the roller can contact the linear inclined side of the template after the bilge roller 9 is installed on the inclined surface of the tail slide door.

[0065] Finally, the remaining bilge roller 9, after being cut off, is installed onto the inclined surface of the tail slide door track.

[0066] Install the bilge rollers at each position in sequence according to the above installation steps.

[0067] It should be noted that the bilge rollers 9 installed between the front and rear horizontal rollers 7 are a set of two rollers. The two bilge rollers 9 are symmetrically arranged with respect to the tailgate center line 6. There are multiple sets of bilge rollers 9 arranged along the tailgate center line 6 on the entire tailgate. The multiple sets of bilge rollers 9 are parallel to each other, and the left and right bilge rollers 9 in each set are symmetrically arranged with respect to the tailgate center line 6.

[0068] S5, install a hinge 14 on the first sealing plate 16 of the rear sliding door, and install a hanging ring 15 on the rear sealing plate 17 of the rear sliding door.

[0069] S6. Using lifting equipment (such as a crane), the stern sliding door 2 is flipped 90° (i.e., flipped from a horizontal state to a vertical state, becoming a standing state), so that its stern sealing plate 17 faces upward and its bow sealing plate 16 faces downward. Then, it is lifted onto the ship in a standing state, and the hinge on the bow sealing plate 16 of the stern sliding door is fixed to the hinge on the stern sealing plate of the hull structure.

[0070] The hinges on the stern plate of the hull structure can be pre-installed on the hull structure.

[0071] After the hinges on the stern sliding door head sealing plate 16 are fixed to the hinges on the stern sealing plate of the hull structure, the crane hook cannot be disengaged at this time. It can only be disengaged after the subsequent manual hoist is installed.

[0072] S7. Fix the lifting lug on the opposite side of the main deck of the ship. Then, fix one end of the hand chain hoist to the lifting lug on the opposite side of the main deck and the other end to the lifting ring 15 of the tail end plate 17 of the stern sliding door. After the hand chain hoist is fixed, the hook of the lifting equipment is released.

[0073] Then, use a hand-operated hoist to open the stern sliding door until the angle of inclination of the bottom surface of the slide is equal to the angle of the hull slide.

[0074] Then, horizontal rollers 18 and bilge rollers 19 are installed on the hull slideway using the same installation method as the horizontal rollers 7 and bilge rollers 9 on the stern sliding door. That is, the installation method and standard of the horizontal rollers 18 on the hull slideway are the same as the installation method and standard of the horizontal rollers 7 in the stern sliding door slideway in step S3, and the installation method and standard of the bilge rollers 19 in the hull slideway are the same as the installation method and standard of the bilge rollers 9 in the stern sliding door slideway in step S4.

[0075] The bilge rollers in the stern sliding gate slide and the bilge rollers in the hull slide refer to the rollers that contact the midsection and stern of the stern-slide-type boat. The midsection and stern of the boat have basically the same shape.

[0076] The inclined roller dock stage, which contacts the bow of the stern slipway-type ship-borne small boat, will not be installed for the time being.

[0077] S8. After the ship is launched, once the ship's electrical system is installed and debugged, the opening and closing debugging of the stern sliding door is completed, and the stern sliding track type shipborne small boat is installed on the hull slide, the bow inclined roller 20 is then installed at the bow of the hull slide.

[0078] The bow roller 20 refers to the roller that contacts the bow of the stern slipway-type boat.

[0079] The tail slide type boat is installed onto the hull slide by a winch.

[0080] It should be understood that the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

Claims

1. A method of installing a stern ramp roller of a dock stage mounted stern drive boat, characterized by, Specifically comprising the following steps: S1, a dock stage, placing the stern ramp on the ground and adjusting the level to reflect the opening state after the actual ship installation; The specific steps of placing the stern ramp on the ground and adjusting the level are: Place the stern ramp flat on the ground through the support structure; Select multiple measurement points on the bottom surface of the stern ramp slide, measure the level of each measurement point using a total station or a level, and adjust the stern ramp according to the measurement results to make the bottom surface of the slide horizontal; S2, draw the stern door center line on the surface of the stern ramp; S3, according to the installation position required by the roller installation drawing, install multiple horizontal rollers at equal intervals along the stern door center line in the slide of the stern ramp, and the first horizontal roller is arranged at a position 150±2mm away from the stern plate of the stern ramp, and at the same time, a guide roller is installed on the stern plate of the stern ramp; S4, taking the installed horizontal roller as a reference datum, using the transom auxiliary installation tool to install the transom inclined roller between the front and rear horizontal rollers; The transom auxiliary installation tool comprises a template for simulating the stern ramp type boat-mounted dinghy plate line type, and an adjusting base fixed at the bottom of the template for adjusting the height position of the template; S5, install a hinge on the bow plate of the stern ramp, and install a lifting ring on the stern plate of the stern ramp; S6, use hoisting equipment to turn the stern ramp 90°, so that the stern plate faces upwards and the bow plate faces downwards, then hoist the stern ramp vertically onto the ship, and fix the hinge on the bow plate of the stern ramp with the hinge on the stern plate of the ship structure; S7, use hoisting equipment to open the stern ramp, and then install horizontal rollers and transom inclined rollers on the ship slide in the same way as the horizontal rollers and transom inclined rollers on the stern ramp; S8, after the ship is launched, after the stern ramp type boat-mounted dinghy is installed on the ship slide, install a bow inclined roller at the bow of the ship slide.

2. The method of installing a stern-rolling roller of a dock stage installation stern- sliding boat according to claim 1, characterized in that, In step S3, after the horizontal rollers are installed, the roller centers of all the horizontal rollers need to be at the same height, and the line connecting the roller centers of all the horizontal rollers is aligned with the upper and lower stern door center lines.

3. The method of claim 2, wherein, The distance from the upper surface of the horizontal roller to the slide bottom surface of the stern ramp is 200±2mm.

4. The method of installing a stern-rolling roller of a dock stage installation stern- sliding boat according to claim 1, characterized in that, In step S4, the specific steps of installing the transom inclined roller between the front and rear horizontal rollers using the transom auxiliary installation tool are as follows: According to the to-be-installed position of the transom inclined roller in the construction drawing, fix the transom auxiliary installation tool at the corresponding position on the slide bottom surface between the front and rear horizontal rollers; Adjust the height of the template of the transom auxiliary installation tool through the adjusting base to make the template bottom surface flush with the upper surface of the horizontal roller; Then, according to the distance between the slide slope of the stern ramp and the inclined edge of the template with the line type, perform excess cutting on the reserved excess of the roller bracket of the transom inclined roller; Then, install the excess cut transom inclined roller on the slide slope of the stern ramp.

5. The method of installing a stern-rolling roller of a dock stage installation stern- sliding boat according to claim 1, characterized in that, The adjusting base is provided with multiple adjusting bases, and the multiple adjusting bases are symmetrically fixed at the bottom of the template. Each adjusting base comprises a bottom plate, a fixed connecting seat, and adjusting bolts connected with the bottom plate and the fixed connecting seat, respectively. The fixed connecting seat is fixed with the template through a fastening bolt.

6. The method of installing a stern-rolling skid boat roller at a dock stage according to claim 5, wherein, The template is a wooden plate, and the profile lines of the two sides of the template are the same as the outer plate lines of the stern ramp type ship-mounted dinghy.

7. The method of installing a stern-rolling roller of a dock stage installation stern- sliding boat according to claim 1, characterized in that, The stern ramp type ship-mounted dinghy is provided with a stern ramp door, and the stern ramp door is provided with a stern ramp door seal plate.

8. The method of installing a stern-rolling roller of a dock stage installation stern- sliding boat according to claim 1, characterized in that, In step S7, the stern ramp door is opened to be horizontal by using the lifting equipment, and the specific steps are as follows: The lifting lug is fixed on the opposite side of the main deck of the ship body; One end of the hand chain block is fixed on the lifting lug on the opposite side of the main deck, and the other end is fixed on the lifting ring of the stern seal plate of the stern ramp door. After the hand chain block is fixed, the hook of the lifting equipment is unhooked. The stern ramp door is opened by using the hand chain block until the slide bottom surface is horizontal.

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