Installation method of marine manual hydraulic adjustable chain controller

Abstract

An installation method of a manual hydraulic adjustable chain controller for a ship comprises the steps that the chain controller is hoisted to the ship, the bottom of the chain controller is welded and fixed to the ship, an anchor chain storage cabin is arranged in the ship till an anchor is retracted and released to an anchor mouth of a ship shell and is fixed, the fit degree of the anchor and the anchor mouth is checked, and an oil drain valve of a manual pump of the hydraulic chain controller is opened; closing an anchor chain fixing knife switch of the chain controller, checking the position of a fixing anchor chain after the knife switch falls down, checking whether the anchor chain can fall into a clamping groove of the fixing knife switch or not, adjusting the front-back position of the chain controller on site, cutting a heightened base at the bottom of the chain controller, and matching the height and the inclination angle of the chain controller; and the anchor chain ring in front of the knife switch can fall into the clamping groove of the knife switch of the chain controller and is clamped and fixed by the knife switch, so that the installation of the anchor chain and the chain controller is completed. The installation difficulty and the position deviation in the installation process are reduced; a series of technical problems of equipment inspection, installation, inspection and the like of the novel chain controller are solved.

Description

Technical Field

[0001] The invention belongs to the field of marine ship design and construction, and in particular relates to an installation method of a ship-used manual hydraulic adjustable chain stopper. Background Art

[0002] The marine roller chain stopper is an auxiliary anchor pulling device located in front of the anchor chain wheel of the bow of the ship. After the anchor chain comes out of the anchor chain wheel, it enters the anchor chain barrel through the chain stopper to lower the anchor and the connecting anchor chain into the sea to fix the position of the ship in the sea. The recovery of the anchor and anchor chain is the opposite operation. The chain stopper is used to provide guidance for the lowering and recovery of the anchor chain. At the same time, when the anchor chain is collected, the chain stopper's own blade is used to fix and lock the anchor chain. It is a device that bears the tension of the anchor chain at the end of the anchor chain and the anchor itself.

[0003] As an emerging anchor pulling auxiliary equipment in recent years, adjustable chain stoppers and manual hydraulic chain stoppers have emerged on the basis of the original mechanical chain stoppers, as well as a new combined adjustable manual hydraulic chain stopper type mentioned in the present invention that has both of the above types.

[0004] The adjustable chain stopper is a device that sets a certain number of adjustable baffles in front and behind the fixed blade of the chain stopper. The baffles can be adjusted in front of and behind the blade, so that the position of the fixed blade can be adjusted. It is used to solve the problem that when the anchor chain is deformed after a period of use, the original blade position is not suitable and the blade cannot get stuck in the anchor chain.

[0005] Manual hydraulic chain stopper is a new type of chain stopper in recent years. It adds hydraulic pump and hydraulic cylinder. It manually operates the hydraulic pump and hydraulic cylinder to lift and lower the fixed blade, replacing the original heavy anchor chain fixed blade opened and closed by manpower. This hydraulic type is more popular and used by foreign ship owners, especially in large ships such as container ships. Summary of the invention

[0006] In order to solve the above problems, the present invention provides a method for installing a manual hydraulic adjustable chain stopper for a ship, and the technical solution adopted is: A method for installing a manual hydraulic adjustable chain stopper for a ship, characterized in that: The specific installation steps are: S1: Before installation, check the appearance of the chain stopper to see if there are any sand holes, cracks, or welding defects. Check whether the overall dimensions of the chain stopper are consistent with the design drawings. Check whether there is any installation adjustment margin left at the bottom of the chain stopper. Inspect the hydraulic equipment and all hydraulic equipment to confirm that the hydraulic cylinder, hydraulic hand pump, hydraulic connecting pipe, etc. are not damaged, leaking, or missing parts. Use the hydraulic pump and hydraulic cylinder to lift and open and lower and close the gate knife to inspect the reliability of the equipment. The specific inspection methods are as follows: (1) Exhaust: Air may enter the hydraulic cylinder during transportation or when it is stored for a long time. Exhaust the hydraulic cylinder before use by fully extending and retracting the piston rod of the hydraulic cylinder 1 to 2 times.

[0007] (2) Operate the manual hydraulic pump. When operating the hydraulic pump, please close the drain valve first, then repeatedly press the operating handle to generate pressure in the manual pump, thereby transmitting the hydraulic pressure to the hydraulic cylinder and fully extending the piston rod of the hydraulic cylinder.

[0008] (3) When the hydraulic pump needs to be reset, slowly open the oil release valve to allow the hydraulic cylinder piston rod to return to the hydraulic cylinder body.

[0009] Repeatedly use the manual hydraulic pump to lift and lower the anchor chain fixed blade of the chain stopper to check the reliability of the hydraulic equipment and the fixed blade. Repeatedly press the operating lever of the manual hydraulic pump to extend and retract the hydraulic cylinder, and control the lifting and lowering of the fixed blade by extending and retracting the hydraulic cylinder.

[0010] After the operation is completed, open the oil release valve to allow the hydraulic cylinder piston rod to return to the hydraulic cylinder. If the connecting oil pipe is removed, the joint must be covered with a rubber cap.

[0011] S2: Lift the chain stopper onto the ship, place the chain stopper according to the estimated installation position on the drawing, and align the chain stopper so that the center of the anchor chain wheel is in a straight line with the center of the anchor chain wheel of the windlass and the center of the anchor chain barrel, so as to ensure that the in and out direction and angle of the anchor chain when in use are in a straight line with the center of the chain stopper; check the position of the adjustable anchor chain stopper to make the number of adjustment shims on both sides of the knife equal.

[0012] S3: Weld and fix the bottom of the chain stopper on the ship; transport the anchor chain and anchor to the bottom of the ship by barge, etc., operate the manual hydraulic pump to lift and open the fixed gate of the chain stopper so that the anchor chain can pass through the chain stopper; start the anchor windlass, install the anchor chain and anchor, and store the anchor chain in the anchor chain storage compartment after passing through the chain stopper roller and the anchor chain wheel of the anchor windlass.

[0013] S4: All anchor chains are retracted into the anchor chain storage compartment until the anchor is fixed on the anchor lip of the ship's hull and the fit between the anchor and the anchor lip is checked.

[0014] S5: Open the drain valve of the hydraulic chain stopper manual pump to return the hydraulic cylinder piston rod into the hydraulic cylinder body, close the anchor chain fixing knife of the chain stopper, check the position of the anchor chain fixed after the knife falls, check whether the anchor chain can fall into the slot of the fixed knife, adjust the front and rear positions of the chain stopper on site, cut the heightened base at the bottom of the chain stopper, and adjust the height and tilt angle of the chain stopper. The height of the heightened base at the bottom of the chain stopper is 150mm, so that the anchor chain ring in front of the knife can fall into the slot of the chain stopper knife and be fixed by the knife. The use angle of the anchor chain through the chain stopper cannot exceed 12~20°, thereby completing the installation of the anchor chain and chain stopper.

[0015] The above-mentioned installation method of a manual hydraulic adjustable chain stopper for a ship, further, the adjustable chain stopper includes a guide roller fixed on the chain stopper body through a main shaft, the bottom of the chain stopper body is provided with a 150mm elevated base, a knife is arranged on one side of the guide roller, fixed baffles are arranged on both sides of the knife, the fixed baffles are fixed on the chain stopper body, a vertically arranged hydraulic cylinder is fixed below the knife and on the chain stopper body, the top of the hydraulic rod of the hydraulic cylinder is connected to one end of the knife, and the surface of the knife has a groove; an adjustment plate is arranged between the fixed baffle and the knife, and the adjustment plate is fixed by a detachable shaft pin.

[0016] An anchor cable fixing shaft is fixed at the front end of the chain stopper body. The anchor cable passes around the anchor cable fixing shaft, and the anchor chain passes around the guide roller. When the anchor chain is clamped and fixed by the gate knife, it passes through the anchor chain ring and tightens the anchor cable.

[0017] The above-mentioned method for installing a manual hydraulic adjustable chain stopper for a ship, further, after the anchor chain and the chain stopper are installed, a reliability test is performed: Open the chain stopper, operate the windlass, retract and release the anchor and anchor chain and brake 2 to 3 times, then brake the windlass, check the reliability of the windlass hydraulic brake operation and the ease of reaching the operating position; check the position of the chain stopper and the fit of the anchor claw and the anchor lip; check the condition of the anchor chain and shackle passing through the anchor chain barrel, chain stopper and sprocket. There should be no chain jumping and twisting on the sprocket, and check whether the position of the anchor chain on the chain stopper and the fixed position of the anchor chain are correct.

[0018] The above-mentioned installation method of a manual hydraulic adjustable chain stopper for a ship, further, is provided with a chain barrel obliquely below the chain stopper body, one end of the anchor chain bypasses the guide roller and enters the chain barrel, passes through the chain barrel and enters the seabed for fixation; the other end of the anchor chain is wrapped around the anchor machine.

[0019] The above-mentioned installation method of a manual hydraulic adjustable chain stopper for a ship, further, the hydraulic cylinder is connected to the hydraulic pump through a hydraulic pipeline, and the top of the hydraulic pump is provided with an operating lever. After pressing the operating lever, the hydraulic rod lifts the gate knife to fix the anchor chain.

[0020] The above-mentioned method for installing a manual hydraulic adjustable chain brake for a ship, further, has a maximum opening angle of the blade of 65°.

[0021] The above-mentioned method for installing a manual hydraulic adjustable chain brake for a ship further comprises a pressure gauge being provided at the connection between the operating lever and the hydraulic pipe.

[0022] The above-mentioned method for installing a manual hydraulic adjustable chain stopper for a ship further comprises the following steps: the adjustment margin length on both sides of the blade is 30 mm.

[0023] The above-mentioned method for installing a manual hydraulic adjustable chain stopper for a ship further comprises: an anchor chain storage compartment is provided below the anchor windlass, and the anchor windlass pulls up the anchor chain from the anchor chain storage compartment.

[0024] The installation process provided by the present invention aims to meet the above-mentioned needs by studying the installation process technology of the new type of chain stopper, formulating detailed installation and inspection process procedures for each detailed step in the installation process, thereby reducing the difficulty of installation and position deviation in the installation process; solving a series of technical difficulties in equipment inspection, installation and inspection of the new chain stopper, and providing design and installation procedures for other subsequent ships. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a side view structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the main structure of the present invention; Figure 3 It is a schematic diagram of the structure of a hydraulic cylinder connected to a hydraulic pump; Figure 4 It is a schematic diagram of the overall structure of the anchor windlass, chain stopper and anchor chain barrel; Among them, 1-chain stopper body, 2-guide roller, 3-gate knife, 4-fixed baffle, 5-adjustment pad, 6-hydraulic cylinder, 7-detachable axle pin, 8-anchor cable fixing shaft, 9-anchor cable, 10-anchor chain barrel, 11-anchor machine, 12-hydraulic pump, 13-hydraulic pipe, 14-pressure gauge, 15-anchor chain storage compartment. DETAILED DESCRIPTION

[0026] The present invention will be further described in conjunction with the accompanying drawings.

[0027] A method for installing a manual hydraulic adjustable chain stopper for a ship, comprising a chain stopper, such as Figure 1 , 2As shown, the chain stopper includes a guide roller, which is fixed to the chain stopper body through a main shaft. The bottom of the chain stopper body has a 150mm elevated base. A knife is arranged on one side of the guide roller, and fixed baffles are arranged on both sides of the knife. The fixed baffles are fixed to the chain stopper body. A vertically arranged hydraulic cylinder is fixed below the knife and on the chain stopper body. The top of the hydraulic rod of the hydraulic cylinder is connected to one end of the knife, and the hydraulic cylinder is connected to the hydraulic pump through a hydraulic pipeline (such as Figure 3 There is an operating lever on the top of the hydraulic pump, and a pressure gauge is provided at the connection between the operating lever and the hydraulic pipeline. After pressing the operating lever, the hydraulic lever lifts the gate knife, and there is a groove on the surface of the gate knife. The anchor chain ring is vertically fixed in the groove, and the maximum opening angle of the gate knife is 65°.

[0028] An adjustment pad is provided between the fixed baffle and the gate knife. The adjustment pad is fixed by a detachable shaft pin. The adjustment margin length on both sides of the gate knife is 30mm.

[0029] An anchor cable fixing shaft is fixed at the front end of the chain stopper body. The anchor cable passes around the anchor cable fixing shaft, and the anchor chain passes around the guide roller. When the anchor chain is clamped and fixed by the gate knife, it passes through the anchor chain ring and tightens the anchor cable.

[0030] like Figure 4 As shown in the figure, a chain barrel is arranged obliquely below the chain stopper body, one end of the anchor chain goes around the guide roller into the chain barrel, passes through the chain barrel and enters the seabed for fixation; the other end of the anchor chain is wound around the anchor windlass. An anchor chain storage compartment is arranged below the anchor windlass, and the anchor windlass pulls up the anchor chain from the anchor chain storage compartment.

[0031] The specific steps are: Step 1, prepare for installation, check the appearance of the incoming chain stopper to see if there are any problems such as sand holes, cracks, welding defects, etc., check whether the overall dimensions of the chain stopper are consistent with the design drawings, and check whether there is any installation adjustment margin left at the root of the chain stopper.

[0032] Step 2: Inspect the hydraulic equipment before installation. Check all hydraulic equipment to make sure that the hydraulic cylinder, hydraulic hand pump, hydraulic connecting pipe, etc. are not damaged, leaking, or missing parts.

[0033] Step 3: Operational inspection before installation. Use the hydraulic pump and hydraulic cylinder to lift and open the gate and lower and close the gate to inspect the reliability of the equipment. The specific operation method is as follows: Exhaust: Air may enter the hydraulic cylinder during transportation or when it is stored for a long time. Exhaust the hydraulic cylinder before use by fully extending and retracting the piston rod of the hydraulic cylinder 1 to 2 times.

[0034] Operate the manual hydraulic pump. When operating the hydraulic pump, please close the drain valve first, OPEN = open, CLOSE = close, and then repeatedly press the operating handle to allow the manual pump to generate pressure, thereby transmitting the hydraulic pressure to the hydraulic cylinder and fully extending the piston rod of the hydraulic cylinder.

[0035] When the hydraulic pump needs to be reset, slowly open the oil release valve to allow the hydraulic cylinder piston rod to return to the hydraulic cylinder body.

[0036] Repeatedly use the manual hydraulic pump to lift and lower the anchor chain fixed blade of the chain stopper to check the reliability of the hydraulic equipment and the fixed blade. Repeatedly press the operating lever of the manual hydraulic pump to extend and retract the hydraulic cylinder, and control the lifting and lowering of the fixed blade by extending and retracting the hydraulic cylinder.

[0037] After the operation is completed, open the oil release valve to allow the hydraulic cylinder piston rod to return to the hydraulic cylinder. If the connecting oil pipe is removed, the joint must be covered with a rubber cap.

[0038] Step 4, hoist the chain stopper onto the ship, place the chain stopper according to the estimated installation position in the drawing, and align the chain stopper so that the center of the anchor chain wheel is in a straight line with the center of the anchor chain wheel of the anchor machine and the center of the anchor chain barrel, so as to ensure that the entry and exit direction and angle of the anchor chain when used in the future are in a straight line with the center of the chain stopper.

[0039] For adjustable chain stopper, it is necessary to check the position of the adjustable anchor chain stop adjustment block to make the number of adjustment blocks on both sides of the knife equal. That is, the position of the knife fixing the anchor chain is achieved by matching the position of the chain stopper knife fixing the anchor chain. The adjustable anchor chain adjustment margin is left for the crew to adjust the position of the knife fixing the anchor chain according to the tightness of the anchor chain in the future.

[0040] Step 5. After confirming that there is no problem with the chain stopper equipment, temporarily fix the chain stopper on the ship by welding a fixing plate at the root of the chain stopper.

[0041] Step 6: transport the anchor chain and anchor to the ship by means of a barge, etc., and install a temporary power station or temporary hydraulic unit on the ship to provide power so that the anchor windlass can be started. Operate the manual hydraulic pump to lift and open the chain stopper fixed blade so that the anchor chain can pass through the chain stopper. Start the anchor windlass, install the anchor chain and anchor, and store the anchor chain in the anchor chain storage compartment after passing through the chain stopper roller and the anchor chain wheel of the anchor windlass.

[0042] Step 7: Retract all anchor chains into the anchor chain storage compartment until the anchor is fixed on the anchor lip of the ship's hull and check the fit between the anchor and the anchor lip.

[0043] Step 8, open the drain valve of the hydraulic chain stopper manual pump, return the hydraulic cylinder piston rod to the hydraulic cylinder body, close the anchor chain fixing knife of the chain stopper, check the position of the anchor chain fixed after the knife falls, and check whether the anchor chain can fall into the slot of the fixed knife, that is, the chain link of the anchor chain is in an upright state and falls into the slot of the fixed knife and is fixed by the knife. Since the anchor lip surface of the hull outer plate fixed anchor and the surface of the anchor equipment are curved surfaces, due to the problem of curved surface manufacturing error, the anchor chain chain link usually cannot be fixed by the knife exactly according to the design effect. At this time, the chain stopper needs to be developed and matched on site according to the actual situation. By adjusting the front and rear positions of the chain stopper on site, cutting the root margin of the chain stopper, and developing the height and inclination angle of the chain stopper, the anchor chain ring in front of the knife can fall into the slot of the chain stopper knife and be fixed by the knife. The use angle of the anchor chain through the chain stopper cannot exceed 12~20°. All of the above require on-site matching of the chain stopper and the anchor chain little by little according to the actual situation, until the vertical ring of the anchor chain falls exactly into the fixed knife slot and is fixed by the knife, thus completing the matching and fixing work of the anchor chain and the chain stopper.

[0044] Step 9, repeat steps 3 and 8, confirm that the hydraulic chain stopper and related hydraulic pump group are working properly, the gate knife fixes the anchor chain correctly, the chain stopper is installed, and use the anchor cable to fix the anchor chain and anchor for the second time.

[0045] Step 10, Anchor and chain stopper reliability test: Open the chain stopper, operate the windlass, retract and release the anchor and anchor chain and brake 2 to 3 times, then brake the windlass, check the reliability of the windlass hydraulic brake operation and the ease of access to the operating position. Check the position of the chain stopper and the fit of the anchor claw and the anchor lip. Check the condition of the anchor chain and shackle passing through the anchor chain barrel, chain stopper and sprocket. There should be no chain jumping and twisting on the sprocket, and check whether the position of the anchor chain on the chain stopper and the anchor chain fixing position are correct.

[0046] Step 11, after the above inspection is correct, it will be submitted to the shipowner's ship surveyor for inspection. After the inspection is correct, the chain stopper will be formally welded to the hull deck. When the welding work is completed, all the work such as the installation and inspection of the above chain stopper is completed.

Claims

1. A method for installing a manual hydraulic adjustable chain stopper for a ship, characterized in that: The specific installation steps are: S1: Before installation, check the appearance of the chain stopper to see if there are any sand holes, cracks, or welding defects. Check whether the overall dimensions of the chain stopper are consistent with the design drawings. Check whether there is any installation adjustment margin left at the bottom of the chain stopper. Inspect the hydraulic equipment and all hydraulic equipment to confirm that the hydraulic cylinder, hydraulic hand pump, hydraulic connecting pipe, etc. are not damaged, leaking, or missing parts. Use the hydraulic pump and hydraulic cylinder to lift and open and lower and close the gate knife to inspect the reliability of the equipment. The specific inspection methods are as follows: (1) Exhaust: Air may enter the hydraulic cylinder during transportation or when it is stored for a long time. Exhaust the hydraulic cylinder before use by fully extending and retracting the piston rod of the hydraulic cylinder 1 to 2 times; (2) Operate the manual hydraulic pump. When operating the hydraulic pump, please close the drain valve first, then repeatedly press the operating handle to generate pressure in the manual pump, thereby transmitting the hydraulic pressure to the hydraulic cylinder and fully extending the piston rod of the hydraulic cylinder; (3) When the hydraulic pump needs to be reset, slowly open the oil release valve to allow the hydraulic cylinder piston rod to return to the hydraulic cylinder body; Repeatedly use the manual hydraulic pump to lift and lower the anchor chain fixed blade of the chain stopper to check the reliability of the hydraulic equipment and the fixed blade. Repeatedly press the operating lever of the manual hydraulic pump to extend and retract the hydraulic cylinder, and control the lifting and lowering of the fixed blade by extending and retracting the hydraulic cylinder; After the operation is completed, open the oil release valve to allow the piston rod of the hydraulic cylinder to return to the hydraulic cylinder. If the connecting oil pipe is removed, the joint must be covered with a rubber cap; S2: Lift the chain stopper onto the ship, place the chain stopper according to the estimated installation position on the drawing, and align the chain stopper so that the center of the anchor chain wheel is in a straight line with the center of the anchor chain wheel of the windlass and the center of the anchor chain barrel, so as to ensure that the in and out direction and angle of the anchor chain when in use are in a straight line with the center of the chain stopper; check the position of the adjustable anchor chain stopper to make the number of adjustment shims on both sides of the knife equal; S3: Weld and fix the bottom of the chain stopper on the ship; transport the anchor chain and anchor to the bottom of the ship by means of a barge, etc., operate the manual hydraulic pump to lift and open the fixed gate of the chain stopper so that the anchor chain can pass through the chain stopper; start the anchor windlass, install the anchor chain and anchor, and store the anchor chain in the anchor chain storage compartment after passing through the roller of the chain stopper and the anchor chain wheel of the anchor windlass; S4: All anchor chains are retracted into the anchor chain storage compartment until the anchor is fixed on the anchor lip of the ship's hull and the fit between the anchor and the anchor lip is checked; S5: Open the drain valve of the hydraulic chain stopper manual pump to return the hydraulic cylinder piston rod into the hydraulic cylinder body, close the anchor chain fixing knife of the chain stopper, check the position of the anchor chain fixed after the knife falls, check whether the anchor chain can fall into the slot of the fixed knife, adjust the front and rear positions of the chain stopper on site, cut the heightened base at the bottom of the chain stopper, and adjust the height and tilt angle of the chain stopper. The height of the heightened base at the bottom of the chain stopper is 150mm, so that the anchor chain ring in front of the knife can fall into the slot of the chain stopper knife and be fixed by the knife. The use angle of the anchor chain through the chain stopper cannot exceed 12~20°, thereby completing the installation of the anchor chain and chain stopper.

2. The method for installing a manual hydraulic adjustable chain stopper for a ship according to claim 1, characterized in that: The adjustable chain stopper includes a guide roller fixed to the chain stopper body through a main shaft, a gate knife is arranged on one side of the guide roller, fixed baffles are arranged on both sides of the gate knife, the fixed baffles are fixed to the chain stopper body, a vertically arranged hydraulic cylinder is fixed below the gate knife and on the chain stopper body, the top of the hydraulic rod of the hydraulic cylinder is connected to one end of the gate knife, and the gate knife has a groove; an adjustment pad is arranged between the fixed baffle and the gate knife, a detachable shaft pin passes through the center of the adjustment pad, after the shaft pin is removed, the adjustment pad can be removed and replaced to be installed on the other side of the gate knife, thereby changing the position of the fixed gate knife; The front ends of the chain stopper body are respectively fixed with anchor cable fixing shafts, the anchor cable goes around the anchor cable fixing shafts, the anchor chain goes around the guide rollers, and when the anchor chain is clamped and fixed by the knife, it passes through the anchor chain ring and tightens the anchor cable.

3. The method for installing a manual hydraulic adjustable chain stopper for a ship according to claim 1, characterized in that: After the anchor chain and chain stopper are installed, a reliability test is carried out: Open the chain stopper, operate the windlass, retract and release the anchor and anchor chain and brake 2 to 3 times, then brake the windlass, check the reliability of the windlass hydraulic brake operation and the ease of reaching the operating position; check the position of the chain stopper and the fit of the anchor claw and the anchor lip; check the condition of the anchor chain and shackle passing through the anchor chain barrel, chain stopper and sprocket. There should be no chain jumping and twisting on the sprocket, and check whether the position of the anchor chain on the chain stopper and the fixed position of the anchor chain are correct.

4. The method for installing a manual hydraulic adjustable chain stopper for a ship according to claim 2, characterized in that: A chain barrel is provided obliquely below the chain stopper body. One end of the chain goes around the guide roller and enters the chain barrel, passes through the chain barrel and enters the seabed for fixation; the other end of the chain is wound around the anchor windlass.

5. The method for installing a manual hydraulic adjustable chain stopper for a ship according to claim 2, characterized in that: The hydraulic cylinder is connected to the hydraulic pump through a hydraulic pipeline. There is an operating lever on the top of the hydraulic pump. After pressing the operating lever, the hydraulic rod lifts the gate knife and fixes the anchor chain.

6. The method for installing a manual hydraulic adjustable chain stopper for a ship according to claim 2, characterized in that: The maximum opening angle of the knife is 65°.

7. The method for installing a manual hydraulic adjustable chain stopper for a ship according to claim 5, characterized in that: A pressure gauge is provided at the connection between the operating lever and the hydraulic pipe.

8. The method for installing a manual hydraulic adjustable chain stopper for a ship according to claim 2, characterized in that: The adjustment margin length on both sides of the knife is 30mm.

9. The method for installing a manual hydraulic adjustable chain stopper for a ship according to claim 2, characterized in that: An anchor chain storage compartment is provided below the anchor windlass, and the anchor windlass pulls up the anchor chain from the anchor chain storage compartment.

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