A method for adjusting hatch cover support pads of container ship

Abstract

The present application relates to the technical field of container ship construction, and a method for adjusting hatch cover support pads of container ships, comprising the following steps: making an anti-pinch fixture; measuring the gap, marking the part that does not meet the gap requirements; lifting the hatch cover; after lifting into place, inserting four anti-pinch fixtures between the box body of the pad and the hatch cover; reducing the flow of the check relief valve of the jack, and uniformly performing the jack pressure relief to allow the hatch cover to slowly descend, ensuring complete pressure relief and the anti-pinch fixture is stressed; personnel increase or decrease the adjustment pads of the pads at the marked positions; uniformly commanding the jack to lift the hatch cover, taking out the anti-pinch fixture, and then uniformly performing the jack pressure relief to allow the hatch cover to slowly descend; re-measure and check the gap accuracy between the pad and the hatch cover, and if there is still non-compliance, repeat the above steps to make adjustments. The present application reduces the operating burden of personnel and equipment, avoids the risk of squeeze injury to personnel, and improves the safety and reliability of operations.

Description

Technical Field

[0001] The present application relates to the technical field of container ship construction, and in particular to a method for adjusting hatch cover support pads of a container ship. Background Art

[0002] The horizontality of the hatch cover of a container ship and the accuracy of the gap with the pad below are important indicators of the construction quality of this type of ship, which is related to the stability of the container lashing of the container ship. The gap between the hatch cover and the pad is required to be less than 2mm, and it needs to be reported to the shipowner for inspection. After the hatch cover is installed for the first time, the personnel will measure the height of the supporting pad required under the hatch cover. The supporting pad includes a pad box, pads and some adjustable pads. The data is handed over to the manufacturer for processing. After the manufacturer has processed it, the pad box is assembled and welded on the hatch coaming. In this process, some deformation will occur, and it is necessary to adjust the gap between the hatch cover and the supporting pad for a second time to ensure the fitting accuracy of the hatch cover and the pad. The traditional method of secondary adjustment is to use an 800T gantry crane to lift the hatch cover to adjust the gap. The specific method is as follows: the personnel first measures the gap between the hatch cover and the supporting pad, marks the unqualified position, lifts the hatch cover with a crane, and increases or decreases the adjustment pads under the pads, then lowers the hatch cover to check whether the gap between the hatch cover and the pads at the marked position meets the requirements. If it still does not meet the requirements, repeat the above steps to increase or decrease the number of adjustment pads in the pad box to meet the final requirements.

[0003] In the construction of container ships, most domestic shipyards currently use the above methods to adjust and confirm the gap accuracy between hatch covers and pads when performing secondary adjustments to hatch cover pads. The above methods take up a long time for cranes and personnel to operate, and there is a high safety risk when operating under the lifted hatch cover. It takes up a lot of resources and affects the ship construction cycle. With the replacement of ships, the volume of container transportation continues to rise, the size and weight of hatch covers are constantly increasing, and the number of supporting pads under hatch covers is also increasing. The workload of cranes to adjust the gap accuracy of hatch cover pads is large, and the safety risk is increased. Summary of the invention

[0004] In order to overcome the problems existing in the prior art, the present application provides a method for adjusting hatch cover support pads of a container ship.

[0005] The present application provides a method for adjusting hatch cover support pads for container ships using the following technical solution:

[0006] A method for adjusting a hatch cover support pad of a container ship comprises the following steps:

[0007] Step 1: Production of the anti-pinch fixture: first install a movable plate in the slide groove of the main body, and connect the top of the movable plate to the movable handle through a rope body, wherein the rope body is wound around the roller and guided in the through hole of the main body, and then weld the upper plate and the lower plate to the upper and lower surfaces of the main body, wherein the upper connecting block and the lower connecting block are assembled in the upper plate, and the lower plate is welded to the bottom fixed plate, and the slide groove on the lower plate corresponds to the slide groove on the main body;

[0008] Step 2: Gap measurement: Use a 2mm thick steel ruler to insert the gap between the hatch cover and the pad to measure. If it can be inserted, mark it next to the pad, indicating that the gap between the pad and the hatch cover does not meet the requirements;

[0009] Step 3: Lift the hatch cover. Start the four jacks installed around the hatch cover at the same time. Four personnel will be on top of the hatch cover, one person will direct, and start the jacks to lift the hatch cover.

[0010] Step 4: After lifting into place, insert four anti-pinch fixtures between the box body of the pad and the hatch cover;

[0011] Step 5: Reduce the flow of the check valve of the jack, unload the pressure of the jack and let the hatch cover slowly descend to ensure complete pressure relief and stress on the anti-pinch fixture;

[0012] Step 6: The personnel increase or decrease the pads at the marked positions;

[0013] Step 7: Command the jack to lift the hatch cover, take out the anti-pinch fixture, and then use the jack to release the pressure to slowly lower the hatch cover;

[0014] Step 8: Re-measure and check the gap accuracy between the pad and the hatch cover. If it still does not meet the requirements, repeat the above steps to make adjustments.

[0015] Preferably, the hatch cover is installed on the hull, the bottom surface of the hatch cover is connected to the surface of the hull through a pad, the positioning holes opened on the bottom surface around the hatch cover cooperate with the positioning pins on the hull, and the jacks are detachably installed on the four sides of the hatch cover, and the output end of the jack is pressed against the surface of the hull.

[0016] By adopting the above technical solution, the hatch cover can be accurately installed on the hull through the positioning holes on the bottom of the hatch cover and the positioning pins on the hull. The hatch cover can be accurately placed on the hull, and the jacks installed on the four sides of the hatch cover are synchronously driven to stably raise and lower the hatch cover, avoiding the danger caused by slippage between the output end of the jack installed on the hull and the hatch cover.

[0017] Preferably, a guide rail is installed on the edge of the hatch cover, and a transverse trolley is installed on the guide rail, wherein a laser rangefinder for measuring the distance between the hatch cover and the hull is installed at the bottom of the transverse trolley.

[0018] By adopting the above technical solution, the transverse trolley installed on the guide rail at the edge of the hatch cover can measure the distance between the hatch cover and the hull through a laser rangefinder, and can detect whether the distance between the hatch cover and the hull is uniform, thereby monitoring whether the hatch cover is placed horizontally on the hull.

[0019] Preferably, the cushion block comprises a box body and a block placed in the box body, wherein the box body is integrally formed with the hull, the block is detachably installed in the box body, and the overall thickness of the cushion block can be adjusted by placing blocks of different thicknesses in the box body.

[0020] Preferably, a plurality of groups of evenly distributed grooves are provided on the top of the box body, wherein the grooves include two placement layers, the outer diameter of the lower placement layer is smaller than that of the upper placement layer, and each placement layer is provided with blocks matching the outer diameter thereof, and the blocks in the upper placement layer and the box body are provided with through holes along their width direction, wherein locking bolts for fixing the pads in the pad box are installed in the through holes.

[0021] By adopting the above technical solution, the cushion block includes a box body integrally formed with the hull and a block placed in the box body. The overall height of the cushion block can be adjusted by adjusting the thickness of the block placed in the box body. In addition, a plurality of slots for placing blocks are provided on the top of the box body. The blocks can be divided into multiple groups and placed in the slot body, thereby reducing the replacement and maintenance costs of the blocks. The lower placement slot in the slot body is used to place blocks with smaller outer diameters. The blocks in the lower placement slot and the blocks in the upper placement slot rub against each other, which can reduce the impact of the hull movable blocks on the membrane material of the box body and increase the service life of the box body. The upper placement layer is used to place blocks with larger outer diameters, and the blocks are fixed in the box body by locking bolts penetrating through the holes on the box body and the blocks.

[0022] Preferably, an anti-pinch fixture is installed on the pad block for supporting the hatch cover placed on the pad block, the anti-pinch fixture includes a main body and an upper plate and a lower plate installed at the upper and lower ends of the main body, wherein the bottom of the lower plate is provided with a fixed plate and a movable plate for clamping the pad block in the width direction, the fixed plate is an arc-shaped plate welded to the bottom of one side of the lower plate, the movable plate is slidably installed in a slide groove penetrating the lower plate and the main body, and a fixed handle is also installed on one side of the main body located on the fixed plate, wherein the movable handle inside the fixed handle is connected to the top of the movable plate through a rope body, and a roller for guiding the rope body is installed on the top of the slide groove of the main body.

[0023] Preferably, a through hole is provided in the main body for driving the rope body to move up and down the movable plate, and the movable handle installed at the outlet of the through hole includes a handle at the free end of the rope body, wherein both ends of the handle are connected to the outer side of the main body through a spring.

[0024] Preferably, the upper plate adopts a split structure, including an upper connecting block and a lower connecting block, wherein a positioning block is provided at the bottom of the upper connecting block to cooperate with the positioning groove at the top of the lower connecting block, and a circular array of positioning grooves of different depths is provided on the top of the lower connecting block. The positioning block adopts two groups of blocks distributed symmetrically, and the top of the block is connected to the upper connecting block through a connecting rod, and the positioning grooves on the lower connecting block are arranged in a circular array.

[0025] Preferably, the top center of the upper connecting block is connected to the top center of the lower connecting block through a telescopic rod, wherein the bottom of the upper connecting block is rotatably connected to the telescopic rod.

[0026] By adopting the above technical solution, the anti-pinch fixture on the pad block is placed between the hatch cover and the pad block box after the hatch cover is lifted by the jack. Before placing it, the anti-pinch fixtures around the hatch cover are adjusted to the same height. Specifically, by rotating the upper connecting block in the upper plate, the positioning block at the bottom of the upper connecting block is rotated into the positioning groove on the surface of the lower connecting block, so as to fix the distance between the upper connecting block and the lower connecting block. When the anti-pinch fixture is put in, the operator holds the fixed handle on the side of the main body, and then pulls the handle of the movable handle with some fingers. At this time, the handle stretches the spring, and the handle drives the rope body to lift the movable plate in the slide groove through the roller guide, so that the movable plate falls completely into the slide grooves of the main body and the lower plate. After the anti-pinch fixture is prevented from entering, the fixed plate at the bottom of the lower plate of the anti-pinch fixture is pressed against the side of the box body, and the movable handle is released. At this time, the movable plate slides out of the slide groove under the action of gravity, and the rope body at the top of the movable block is connected to the handle. The length of the handle is greater than the inner diameter of the through hole in the main body. The handle can limit the movable block through the rope body to prevent the movable block from completely sliding out of the slide groove. At this time, the fixed plate and the movable plate are clamped on both sides of the width direction of the box body, avoiding the danger of the anti-pinch fixture sliding out when the hatch cover is pressed on the anti-pinch fixture.

[0027] Preferably, plates in contact with pads on the hull are evenly distributed around the hatch cover, and plates for installing jacks are provided in the centers of the four sides of the hatch cover. The plates are connected to the sides of the hatch cover by right-angled triangle reinforcement plates, and an extended guard plate is provided in the space between the gaskets on the hatch cover corresponding to the hull.

[0028] By adopting the above technical solution, the plate body around the hatch cover is in contact with the pad and the jacks of the jack are installed, and the plate body is reinforced by the right-angled triangle plate to ensure the strength of the plate body.

[0029] In summary, the present application includes at least one of the following beneficial technical effects:

[0030] 1. This application uses a jack to lift the hatch cover instead of the traditional 800T gantry crane, which saves time and reduces costs while also relaxing the requirements for the hatch cover operation cycle. The existing method requires the use of a gantry crane, and some hatch covers are not within the lifting range of the dock crane, so the hatch cover must be adjusted in the dock. The large number of engineering nodes in the dock, the complex cross-operation, and the shortage of gantry crane time bring more difficulties to the adjustment of the hatch cover gasket gap. The present method does not need to use a crane, and the hatch cover gasket gap adjustment operation can be performed at all stages after the hatch cover is loaded, which greatly reduces the operating burden of personnel and equipment;

[0031] 2. The present application uses a jacking method to avoid the influence of weather and operators on the hatch cover lifting by traditional cranes, and the risk of personnel being squeezed by the large swing of the hatch cover. The use of anti-pinch fixtures means that when the gantry crane is used to lift the hatch cover, the personnel adjust the height of the hatch cover pad directly below the hatch cover, which may cause the hatch cover to be squeezed and accidentally fall. After the hatch cover is lifted by the jack, the anti-pinch fixture is used in time to support the hatch cover, which completely avoids the risk of personnel being squeezed and injured by the hatch cover falling abnormally when the gap of the hatch cover pad is adjusted. Even if the jack is completely depressurized, the hatch cover can be supported from falling.

[0032] 3. The method of the present application is simple and easy to operate, has low requirements on workers' labor skills, reduces labor intensity, and has the effect of reducing production costs. The method has low investment, use and maintenance costs, and has a significant cost reduction effect. It is also easy to manage, and the method is relatively practical. It is relatively simple and suitable for container ships with different positions. It has strong versatility and is easy to promote and apply.

[0033] 4. A jack with a check valve is used in this application. When the hatch cover is lifted by a gantry crane, the hatch cover will rotate freely, posing a risk of squeezing the operating personnel. The use of this type of jack can control the slow pressure relief of the jack, ensure that the hatch cover falls slowly, reduce the risk of squeezing personnel when the hatch cover is reset, and greatly improve the safety and reliability of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 The present invention is a flow chart of a method for adjusting hatch cover support pads of a container ship.

[0035] Figure 2 It is a schematic diagram of the structure in which the anti-pinch fixture is placed on the pad box of the hull to support the hatch cover;

[0036] Figure 3 yes Figure 2 Enlarged view of point A in the middle;

[0037] Figure 4 yes Figure 2 Exploded view of the center pad and anti-pinch fixture;

[0038] Figure 5 yes Figure 4 Enlarged view of point B in the middle;

[0039] Figure 6 yes Figure 4 Bottom side structure diagram;

[0040] Figure 7 yes Figure 6 Enlarged view of point C in the middle;

[0041] Figure 8 This is an exploded view of the anti-pinch fixture.

[0042] Description of reference numerals: 1. hatch cover; 11. positioning hole; 12. jack; 13. guide rail; 131. traverse trolley; 132. laser rangefinder; 14. plate; 141. reinforcement plate; 15. extension guard plate; 2. hull; 21. positioning pin; 3. pad; 31. box body; 311. trough body; 3111. lower placement layer; 3112. upper placement layer; 32. block; 33. through hole; 34. locking bolt; 4. Anti-pinch fixture; 41. Main body; 411. Slide groove; 412. Fixed handle; 4121. Rope body; 413. Movable handle; 4131. Handle; 4132. Spring; 414. Roller; 415. Through hole; 42. Upper plate; 421. Upper connecting block; 422. Lower connecting block; 423. Positioning block; 424. Positioning groove; 425. Telescopic rod; 43. Lower plate; 431. Fixed plate; 432. Movable plate. DETAILED DESCRIPTION

[0043] The following is combined with Figure 1-8 This application is described in further detail.

[0044] An embodiment of the present application discloses a method for adjusting a hatch cover support pad of a container ship.

[0045] Reference Figure 1 , a method for adjusting a hatch cover support pad of a container ship, comprising the following steps:

[0046] Step 1: Production of the anti-pinch fixture 4. First, install a movable plate 432 in the slide groove 411 of the main body 41, and connect the top of the movable plate 432 to the movable handle 4131 through a rope body 4121, wherein the rope body 4121 is wound around the roller 414 and guided in the through hole 415 of the main body 41, and then weld the upper plate 42 and the lower plate 43 to the upper and lower surfaces of the main body 41, wherein the upper connecting block 421 and the lower connecting block 422 are assembled in the upper plate 42, and the lower plate 43 is welded to the bottom fixed plate 431, and the slide groove 411 on the lower plate 43 corresponds to the slide groove 411 on the main body 41;

[0047] Step 2: Gap measurement: Use a 2mm thick steel ruler to insert the gap between hatch cover 1 and pad 3 to measure. If it can be inserted, mark it next to pad 3, indicating that the gap between pad 3 and hatch cover 1 does not meet the requirements;

[0048] Step 3: Lift the hatch cover 1, and start the four jacks 12 installed around the hatch cover 1 at the same time. Four personnel are above the hatch cover 1, one of them is in charge, and they start the jacks 12 to lift the hatch cover 1;

[0049] Step 4: After lifting into place, insert the four anti-pinch fixtures 4 between the box body 31 of the cushion block 3 and the hatch cover 1;

[0050] Step 5: Reduce the flow of the check relief valve of the jack 12, and uniformly release the pressure of the jack 12 to allow the hatch cover 1 to slowly descend, ensuring that the pressure is completely released and the anti-pinch fixture 4 is stressed;

[0051] Step 6: The personnel increase or decrease the adjustment pads of the pad 3 at the marked position;

[0052] Step 7: Command the jack 12 to lift the hatch cover 1, take out the anti-pinch fixture 4, and then unload the pressure of the jack 12 to slowly lower the hatch cover 1;

[0053] Step 8: Re-measure and check the gap accuracy between the pad 3 and the hatch cover 1. If it still does not meet the requirements, repeat the above steps to make adjustments.

[0054] Reference Figure 2-Figure 8 The hatch cover 1 is mounted on the hull 2, and the bottom surface of the hatch cover 1 is connected to the surface of the hull 2 ​​through the pad 3. The positioning holes 11 opened on the bottom surface of the hatch cover 1 cooperate with the positioning pins 21 on the hull 2. The four sides of the hatch cover 1 are detachably installed with jacks 12, and the output end of the jack 12 is tightly pressed against the surface of the hull 2. The bottom of the hatch cover 1 is accurately mounted on the hull 2 ​​through the positioning holes 11 and the positioning pins 21 on the hull 2, so that the hatch cover 1 can be accurately placed on the hull 2. The jacks 12 installed on the four sides of the hatch cover 1 are synchronously driven to stably lift and lower the hatch cover 1, avoiding the danger caused by the output end of the jack 12 installed on the hull 2 ​​and the hatch cover 1 slipping.

[0055] Reference Figure 2 and Figure 3 The edge of the hatch cover 1 is provided with a guide rail 13, on which a traverse trolley 131 is provided, wherein a laser rangefinder 132 for measuring the distance between the hatch cover 1 and the hull 2 ​​is provided at the bottom of the traverse trolley 131. The traverse trolley 131 provided on the guide rail 13 at the edge of the hatch cover 1 can measure the distance between the hatch cover 1 and the hull 2 ​​through the laser rangefinder 132, and can detect whether the distance between the hatch cover 1 and the hull 2 ​​is uniform, thereby monitoring whether the hatch cover 1 is placed horizontally on the hull 2.

[0056] Reference Figure 2-Figure 8The cushion block 3 includes a box body 31 and a block 32 placed in the box body 31, wherein the box body 31 is integrally formed with the hull 2, and the block 32 is detachably installed in the box body 31. The overall thickness of the cushion block 3 is adjusted by placing blocks 32 of different thicknesses in the box body 31. The top of the box body 31 is provided with a plurality of evenly distributed slots 311, wherein the slots 311 include two placement layers, wherein the outer diameter of the lower placement layer 3111 is smaller than that of the upper placement layer 3112, and each placement layer is provided with a block 32 adapted to its outer diameter, and the blocks 32 in the upper placement layer 3112 and the box body 31 are provided with through holes 33 along their width direction, wherein locking bolts 34 for fixing the cushion block 3 in the box of the cushion block 3 are installed in the through holes 33. The cushion block 3 includes a box body 31 integrally formed with the hull 2 ​​and a block 32 placed in the box body 31, and the overall height of the cushion block 3 can be adjusted by adjusting the thickness of the block 32 placed in the box body 31. In addition, the top of the box body 31 is provided with a plurality of slots 311 for placing the blocks 32, so that the blocks 32 can be divided into multiple groups and placed in the slots 311, thereby reducing the replacement and maintenance costs of the blocks 32. The lower placement slots in the slots 311 are used to place blocks 32 with smaller outer diameters. The blocks 32 in the lower placement slots and the blocks 32 in the upper placement slots rub against each other, thereby reducing the impact of the movable blocks 32 of the hull 2 ​​on the membrane material of the box body 31, thereby increasing the service life of the box body 31. The upper placement layer 3112 is used to place blocks 32 with larger outer diameters, and the blocks 32 are fixed in the box body 31 by means of locking bolts 34 that penetrate through the through holes 33 on the box body 31 and the blocks 32.

[0057] Reference Figure 2-Figure 8An anti-pinch fixture 4 is installed on the pad block 3 to support the hatch cover 1 placed on the pad block 3. The anti-pinch fixture 4 includes a main body 41 and an upper plate 42 and a lower plate 43 installed at the upper and lower ends of the main body 41, wherein the bottom of the lower plate 43 is provided with a fixed plate 431 and a movable plate 432 for clamping the pad block 3 in the width direction, the fixed plate 431 is an arc-shaped plate welded to the bottom of one side of the lower plate 43, the movable plate 432 is slidably installed in a slide groove 411 passing through the lower plate 43 and the main body 41, and a fixed handle 412 is also installed on one side of the fixed plate 431 of the main body 41, wherein the movable handle 413 inside the fixed handle 412 is connected to the top of the movable plate 432 through a rope body 4121, and a roller 414 for guiding the rope body 4121 is installed on the top of the slide groove 411 of the main body 41. The main body 41 is provided with a through hole 415 for the rope 4121 driving the movable plate 432 to move upward and downward. The movable handle 413 installed at the outlet of the through hole 415 includes a handle 4131 at the free end of the rope 4121, wherein the two ends of the handle 4131 are connected to the outer side of the main body 41 through a spring 4132. The upper plate 42 adopts a split structure, including an upper connecting block 421 and a lower connecting block 422, wherein a positioning block 423 is provided at the bottom of the upper connecting block 421 and is connected with a positioning groove 424 at the top of the lower connecting block 422, and the top of the lower connecting block 422 has three groups of positioning grooves 424 of different depths in a circumferential array, and the positioning block 423 adopts two groups of blocks 32 distributed symmetrically, and the top of the block 32 is connected to the upper connecting block 421 through a connecting rod, and the positioning grooves 424 on the lower connecting block 422 are arranged in a circumferential array. The top center of the upper connection block 421 is connected to the top center of the lower connection block 422 through a telescopic rod 425, wherein the bottom of the upper connection block 421 is rotatably connected to the telescopic rod 425. After the hatch cover 1 is lifted by the jack 12, the anti-pinch fixture 4 on the cushion block 3 is placed between the hatch cover 1 and the box body 31 of the cushion block 3. Before placing, the anti-pinch fixture 4 around the hatch cover 1 is adjusted to the same height. Specifically, by rotating the upper connection block 421 in the upper plate 42, the positioning block 423 at the bottom of the upper connection block 421 is rotated into the positioning groove 424 on the surface of the lower connection block 422, and the distance between the upper connection block 421 and the lower connection block 422 is fixed.When the anti-pinch fixture 4 is put in, the operator holds the fixed handle 4131 on the side of the main body 41, and then pulls the handle 4131 of the movable handle 413 with some fingers. At this time, the handle 4131 stretches the spring 4132, and the handle 4131 drives the rope body 4121 to pass through the roller 414 to guide the movable plate 432 in the slide groove 411 to lift, so that the movable plate 432 completely falls into the slide groove 411 of the main body 41 and the lower plate 43. After the anti-pinch fixture 4 is inserted, the fixed plate 431 at the bottom of the lower plate 43 of the anti-pinch fixture 4 is pressed against the box body 31, release the movable handle 413, at this time, the movable plate 432 slides out of the slide groove 411 under the action of gravity, and the rope body 4121 on the top of the movable block is connected to the handle, the length of the handle is greater than the inner diameter of the through hole 415 in the main body 41, the handle can limit the movable block through the rope body 4121, and prevent the movable block from completely sliding out of the slide groove 411. At this time, the fixed plate 431 and the movable plate 432 are clamped on both sides of the width direction of the box body 31, avoiding the danger of the anti-pinch fixture 4 sliding out when the hatch 1 is pressed on the anti-pinch fixture 4.

[0058] Reference Figure 2 , the hatch cover 1 is evenly distributed with plates 14 in contact with the pads 3 on the hull 2, and the centers of the four sides of the hatch cover 1 are provided with plates 14 for installing the jacks 12, the plates 14 and the sides of the hatch cover 1 are connected by right-angled triangle reinforcement plates 141, and the hatch cover 1 is provided with extension guard plates 15 in the space between the gaskets on the hull 2. The hatch cover 1 is in contact with the pads 3 through the plates 14 and the jacks 12 are installed, and the plates 14 are reinforced by right-angled triangle plates to ensure the strength of the plates 14.

[0059] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A method for adjusting a hatch cover support pad of a container ship, characterized in that: The following steps are involved: Step 1: Production of the anti-pinch fixture: first install a movable plate in the slide groove of the main body, and connect the top of the movable plate to the movable handle through a rope body, wherein the rope body is wound around the roller and guided in the through hole of the main body, and then weld the upper plate and the lower plate to the upper and lower surfaces of the main body, wherein the upper connecting block and the lower connecting block are assembled in the upper plate, and the lower plate is welded to the bottom fixed plate, and the slide groove on the lower plate corresponds to the slide groove on the main body; Step 2: Gap measurement: Use a 2mm thick steel ruler to insert the gap between the hatch cover and the pad to measure. If it can be inserted, mark it next to the pad, indicating that the gap between the pad and the hatch cover does not meet the requirements; Step 3: Lift the hatch cover. Start the four jacks installed around the hatch cover at the same time. Four personnel will be on top of the hatch cover, one person will direct, and start the jacks to lift the hatch cover. Step 4: After lifting into place, insert four anti-pinch fixtures between the box body of the pad and the hatch cover; Step 5: Reduce the flow of the check valve of the jack, unload the pressure of the jack and let the hatch cover slowly descend to ensure complete pressure relief and stress on the anti-pinch fixture; Step 6: The personnel increase or decrease the pads at the marked positions; Step 7: Command the jack to lift the hatch cover, take out the anti-pinch fixture, and then use the jack to release the pressure to slowly lower the hatch cover; Step 8: Re-measure and check the gap accuracy between the pad and the hatch cover. If there is still a discrepancy, repeat the above steps to make adjustments; The hatch cover is installed on the hull, and the bottom surface of the hatch cover is connected to the surface of the hull through a pad. The positioning holes arranged on the bottom surface of the hatch cover cooperate with the positioning pins on the hull. Jacks are detachably installed on the four sides of the hatch cover, and the output ends of the jacks are tightly pressed against the surface of the hull; an anti-pinch fixture is installed on the pad for supporting the hatch cover placed on the pad, and the anti-pinch fixture comprises a main body and an upper plate and a lower plate installed at the upper and lower ends of the main body, wherein a fixed plate and a movable plate for clamping the width direction of the pad are provided at the bottom of the lower plate, the fixed plate adopts an arc plate welded to the bottom of one side of the lower plate, and the movable plate is slidably installed in a slide groove penetrating the lower plate and the main body, and a fixed handle is also installed on one side of the main body located on the fixed plate, wherein the movable handle inside the fixed handle is connected to the top of the movable plate through a rope body, and a roller for guiding the rope body is installed at the top of the slide groove of the main body.

2. A method for adjusting hatch cover support pads of a container ship according to claim 1, characterized in that: A guide rail is installed at the edge of the hatch cover, and a transverse trolley is installed on the guide rail, wherein a laser rangefinder for measuring the distance between the hatch cover and the hull is installed at the bottom of the transverse trolley.

3. A method for adjusting hatch cover support pads of a container ship according to claim 1, characterized in that: The cushion block comprises a box body and a block placed in the box body, wherein the box body is integrally formed with the hull, and the block is detachably installed in the box body, and the overall thickness of the cushion block can be adjusted by placing blocks of different thicknesses in the box body.

4. A method for adjusting hatch cover support pads of a container ship according to claim 3, characterized in that: The top of the box body is provided with a plurality of groups of evenly distributed grooves, wherein the grooves include two placement layers, the outer diameter of the lower placement layer is smaller than that of the upper placement layer, and each placement layer is provided with a block adapted to its outer diameter, and the blocks in the upper placement layer and the box body are provided with through holes along their width direction, wherein locking bolts for fixing the pads in the pad box are installed in the through holes.

5. The method for adjusting hatch cover support pads of a container ship according to claim 1, characterized in that: The main body is provided with a through hole for driving the rope body to move up and down the movable plate. The movable handle installed at the outlet of the through hole includes a handle at the free end of the rope body, wherein the two ends of the handle are connected to the outer side of the main body through a spring.

6. A method for adjusting hatch cover support pads of a container ship according to claim 1, characterized in that: The upper plate adopts a split structure, including an upper connecting block and a lower connecting block, wherein a positioning block is provided at the bottom of the upper connecting block to cooperate with the positioning groove at the top of the lower connecting block, and a circular array of positioning grooves of different depths is provided on the top of the lower connecting block. The positioning block adopts two groups of blocks distributed symmetrically, and the top of the block is connected to the upper connecting block through a connecting rod, and the positioning grooves on the lower connecting block are arranged in a circular array.

7. A method for adjusting hatch cover support pads of a container ship according to claim 6, characterized in that: The top center of the upper connecting block is connected to the top center of the lower connecting block through a telescopic rod, wherein the bottom of the upper connecting block is rotatably connected to the telescopic rod.

8. The method for adjusting hatch cover support pads of a container ship according to claim 1, characterized in that: Plates that contact the pads on the hull are evenly distributed around the hatch cover, and plates for installing jacks are provided in the centers of the four sides of the hatch cover. The plates are connected to the sides of the hatch cover by right-angled triangle reinforcement plates, and extended guard plates are provided in the spaces between the gaskets on the hull corresponding to the hatch cover.

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