A method and device for single-piece alignment of a large low-speed methanol main engine bed

Abstract

The present application belongs to the field of low-speed ship methanol main engine manufacturing, and particularly relates to a large low-speed ship methanol main engine bed single-piece adjusting method and device. The present application comprises a first-end adjusting device (100) and a plurality of second-end adjusting devices (200); the second-end adjusting device (200) is provided with a connecting pipe (201); the first-end adjusting device (100) is used for fixing and adjusting the distance between the first-end bed single-piece and the second bed single-piece and the perpendicularity of the first-end bed single-piece and the second bed single-piece to the bed bottom surface; the second-end adjusting device (200) is connected with the first-end adjusting device (100) through the connecting pipe (201) and is used for adjusting the distance between the subsequent bed single-pieces and the perpendicularity of the subsequent bed single-pieces to the bed bottom surface. The device and method of the present application can be adjusted without repeated welding and cutting, and a single set of device can complete all operations, which is convenient for installation and adjustment, improves the efficiency, saves time and reduces the safety risk.

Description

Technical Field

[0001] This invention belongs to the field of low-speed marine methanol engine manufacturing, specifically relating to a single-piece adjustment method and device for the base of a large low-speed marine methanol engine. Background Technology

[0002] Large, low-speed marine methanol engines significantly reduce emissions of nitrogen oxides, sulfur oxides, particulate matter, and greenhouse gases compared to traditional internal combustion engines. Methanol, as a fuel, offers more advantages over liquefied natural gas in terms of ship storage, transportation, and use.

[0003] The single-unit installation process of a large, low-speed marine methanol main engine mainly includes steps such as base machining and inspection, base positioning, and frame installation. Base positioning is one of the key steps. This step requires precise alignment and fixation to ensure a tight connection between the frame and the base and stable operation of the main engine. After the frame is installed, a series of inspections and tests are required to ensure that it meets design requirements and operating standards.

[0004] The existing technology for adjusting the base of large, low-speed marine methanol main engines requires temporary support ribs that need to be welded to the components of the base, which violates the specifications; the welding process is time-consuming and poses safety hazards; different models require different adjustment devices, resulting in poor versatility, low installation and positioning efficiency, and low assembly accuracy. Summary of the Invention

[0005] This invention addresses the problems of existing technologies for adjusting the base plates of large, low-speed marine methanol main engines, which require temporary support ribs welded to the components of the base plates, violating specifications; the welding process is time-consuming and poses safety hazards; different models require different adjustment devices, resulting in poor versatility, low assembly accuracy, and low installation and positioning efficiency. The invention proposes a new installation and adjustment device for the base plates of large, low-speed marine methanol main engines, comprising a forward adjustment device and multiple secondary rear adjustment devices. The secondary rear adjustment devices are equipped with connecting pipes. The forward adjustment device is used to fix and adjust the distance between the forward and secondary base plates and the perpendicularity of the forward and secondary base plates to the base bottom surface. The secondary rear adjustment devices are connected to the forward adjustment device via connecting pipes and are used to adjust the distance between subsequent base plates and their perpendicularity to the base bottom surface.

[0006] According to the above-described single-piece mounting and adjustment device for a large low-speed marine methanol main engine base, the bow-end adjustment device includes a first MD-type top bracket; a first fixed flange and a first adjusting flange of the bow-end adjustment device are threadedly fitted on one end of the first MD-type top bracket; a second fixed flange and a second adjusting flange of the bow-end adjustment device are threadedly fitted on the other end of the first MD-type top bracket; a first stop bolt of the bow-end adjustment device is provided on the first adjusting flange of the bow-end adjustment device; and a second stop bolt of the bow-end adjustment device is provided on the second adjusting flange of the bow-end adjustment device.

[0007] According to the above-described single-piece mounting and adjusting device for a large low-speed marine methanol main engine base, the secondary rear-end adjusting device includes a second MD-type top bracket; a connecting pipe is threaded onto one end of the second MD-type top bracket; a first fixed flange and a first adjusting flange of the secondary rear-end adjusting device are threaded onto the other end of the second MD-type top bracket; a first stop bolt of the secondary rear-end adjusting device is provided on the connecting pipe; and a second stop bolt of the secondary rear-end adjusting device is provided on the first adjusting flange of the secondary rear-end adjusting device.

[0008] According to the above-described single-piece mounting adjustment device for a large low-speed marine methanol main engine base, the diameters of the first fixed flange of the bow adjustment device, the second fixed flange of the bow adjustment device, and the first fixed flange of the secondary rear adjustment device are all 100-200mm, and the thickness is all 10-20mm; the diameters of the first adjusting flange of the bow adjustment device, the second adjusting flange of the bow adjustment device, and the first adjusting flange of the secondary rear adjustment device are all 150-300mm, and the thickness is all 20-40mm; the diameters of the first stop bolt of the bow adjustment device, the second stop bolt of the bow adjustment device, the first stop bolt of the secondary rear adjustment device, and the second stop bolt of the secondary rear adjustment device are all 10-30mm, and the length is 150-250mm.

[0009] According to the above-described large low-speed marine methanol main engine base single-piece mounting and adjustment device, the first MD type top bracket and the second MD type top bracket are both MD-20, and their dimensions are determined according to the load-bearing weight and installation spacing of the single base piece.

[0010] According to the above-described single-piece mounting and adjustment device for a large low-speed marine methanol main engine base, the length of the connecting pipe is 20-80mm.

[0011] According to the above-described large low-speed marine methanol engine base single-piece mounting and adjustment device, the first adjusting flange of the bow-end adjustment device, the second adjusting flange of the bow-end adjustment device, and the first adjusting flange of the secondary rear-end adjustment device adjust the position of the bow-end base single piece and the second base single piece by rotation. The first fixing flange of the bow-end adjustment device, the second fixing flange of the bow-end adjustment device, and the first fixing flange of the secondary rear-end adjustment device are used to fix the adjusted position of the bow-end base single piece and the second base single piece.

[0012] According to the above-described single-piece mounting and adjustment device for a large low-speed marine methanol main engine base, the first stop bolt of the front end adjustment device, the second stop bolt of the front end adjustment device, the first stop bolt of the secondary rear end adjustment device, and the second stop bolt of the secondary rear end adjustment device are respectively used to lock the positions of the first adjusting flange and the first MD type top code, the second adjusting flange of the front end adjustment device and the first MD type top code, the connecting pipe and the second MD type top code, and the first adjusting flange of the secondary rear end adjustment device and the second MD type top code after the single-piece mounting and adjustment of the base is completed.

[0013] According to the above-described method for adjusting a single-piece mounting and adjusting device for a large low-speed marine methanol main engine base, the method includes the following steps:

[0014] S1: Fix the single piece of the first end base and adjust its perpendicularity to the bottom surface of the base;

[0015] S2: Use the first-end adjustment device to adjust the distance between the first-end base plate and the second base plate, as well as the perpendicularity of the first-end base plate, the second base plate, and the bottom surface of the base.

[0016] First, screw the first fixed flange and the second fixed flange of the first end adjustment device into both ends of the first MD type top bracket, so that the distance between the first fixed flange and the second fixed flange of the first end adjustment device is less than the distance between the single piece of the first end base and the single piece of the second base.

[0017] Next, adjust the length of the first MD type top code and insert both ends of the first MD type top code into the adjustment holes of the first base piece and the second base piece, respectively.

[0018] Next, screw the first adjusting flange of the head-end adjusting device into one end of the first MD-type top bracket, and screw the second adjusting flange of the head-end adjusting device into the other end of the first MD-type top bracket.

[0019] Then adjust the distance between the first base plate and the second base plate, as well as the perpendicularity of the first base plate, the second base plate, and the bottom surface of the base.

[0020] Finally, the first adjusting flange of the first end adjusting device and the first fixed flange of the first end adjusting device are used to clamp and position the single piece of the first end base, and the first stop bolt of the first end adjusting device is used to fix it; the second adjusting flange of the first end adjusting device and the second fixed flange of the first end adjusting device are used to clamp and position the single piece of the second base, and the second stop bolt of the first end adjusting device is used to fix it.

[0021] S3: The position of each individual chip on the subsequent base and its perpendicularity to the bottom surface of the base are adjusted sequentially using the secondary rear-end adjustment device until the adjustment of all individual chips is completed.

[0022] First, screw the connecting pipe of the secondary rear end adjustment device and the first fixed flange of the secondary rear end adjustment device into the two ends of the second MD type top code, so that the distance between the outer end face of the connecting pipe and the outer end face of the first fixed flange of the secondary rear end adjustment device is less than the distance between the second base plate and the third base plate.

[0023] Next, adjust the length of the second MD type top code, screw one end of the connecting pipe into one end of the first MD type top code, insert the other end of the second MD type top code into the adjustment hole of the third base piece, and then screw the first adjusting flange of the secondary rear adjustment device into one end of the second MD type top code.

[0024] Adjust the position of the second base chip and the distance between the second base chip and the third base chip, as well as the perpendicularity of the second base chip, the third base chip and the bottom surface of the base;

[0025] The third base piece is clamped by the first fixed flange of the secondary rear adjustment device and the first adjusting flange of the secondary rear adjustment device, and then fixed by the second stop bolt of the secondary rear adjustment device.

[0026] Repeat step S3 above until all individual chips are adjusted and all base chips are adjusted.

[0027] According to the above-described method for installing and adjusting the single-piece base of a large low-speed marine methanol main engine, in steps S2 and S3, the first MD type top bracket and the second MD type top bracket are used for fine-tuning the distance between the single-piece base pieces, the first adjusting flange of the first-end adjusting device, the second adjusting flange of the first-end adjusting device, and the first adjusting flange of the second-rear-end adjusting device are used for coarse-tuning the distance between the single-piece base pieces, and the first stop bolt of the first-end adjusting device, the second stop bolt of the first-end adjusting device, the first stop bolt of the second-rear-end adjusting device, and the second stop bolt of the second-rear-end adjusting device are used to finally fix the position of the single-piece base piece.

[0028] The beneficial effects of the present invention are as follows:

[0029] 1. This invention uses a front-end adjustment device and multiple rear-end adjustment devices; the rear-end adjustment device is equipped with a connecting pipe; the front-end adjustment device is used to fix and adjust the distance and perpendicularity between the front-end base piece and adjacent base pieces; the rear-end adjustment device is connected to the front-end adjustment device through the connecting pipe and is used to adjust the distance and perpendicularity between subsequent base pieces, thereby replacing the welding method: by replacing welding with mechanical devices, the use of temporary support ribs for welding during the installation and adjustment of base pieces is avoided, which meets the specification requirement that temporary support ribs are not allowed to be welded to the components of the marine methanol main engine base piece, and improves the assembly accuracy.

[0030] 2. This invention uses an MD-type top bracket. By changing the connecting pipe of different lengths and adjusting the flange position, the universal structure allows one set of equipment to be used for multiple models, reducing equipment costs and storage space.

[0031] 3. The present invention uses a first-end adjustment device to fix and adjust the distance between the first-end base piece and the second base piece and its perpendicularity to the bottom surface; the second-end adjustment device is a modular structure connected to the first-end adjustment device through a connecting pipe. The combined design of the first-end and second-end adjustment devices eliminates the need for repeated welding and cutting during the adjustment process. A single device can complete all operations, which is convenient for installation and adjustment, improves adjustment efficiency, saves time, and reduces safety risks. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of a single-piece mounting and adjustment device for a large low-speed marine methanol main engine base according to the present invention.

[0033] Figure 2 This is a schematic diagram of the use of a single-piece mounting and adjustment device for a large low-speed marine methanol main engine base according to the present invention.

[0034] In the diagram: 100 - First-end adjustment device, 200 - Secondary rear-end adjustment device, 201 - Connecting pipe, 110 - First MD type top bracket, 111 - First fixed flange of the first-end adjustment device, 121 - First adjusting flange of the first-end adjustment device, 112 - Second fixed flange of the first-end adjustment device, 122 - Second adjusting flange of the first-end adjustment device, 131 - First stop bolt of the first-end adjustment device, 132 - Second stop bolt of the first-end adjustment device, 210 - Second MD type top bracket, 211 - First fixed flange of the secondary rear-end adjustment device, 221 - First adjusting flange of the secondary rear-end adjustment device, 231 - First stop bolt of the secondary rear-end adjustment device, 232 - Second stop bolt of the secondary rear-end adjustment device. Detailed Implementation

[0035] Preferred Implementation

[0036] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0037] like Figure 1 , Figure 2 As shown: In this embodiment, a single-piece mounting and adjustment device for a large low-speed marine methanol main engine base includes a front-end adjustment device 100 and multiple secondary rear-end adjustment devices 200; the secondary rear-end adjustment devices 200 are provided with connecting pipes 201; the front-end adjustment device 100 is used to fix and adjust the distance between the front-end base piece and the second base piece, as well as the perpendicularity of the front-end base piece and the second base piece to the bottom surface of the base; the secondary rear-end adjustment devices 200 are connected to the front-end adjustment device 100 through connecting pipes 201, and are used to adjust the distance between the subsequent base pieces and their perpendicularity to the bottom surface of the base.

[0038] The first end adjustment device 100 includes a first MD type top bracket 110; a first fixed flange 111 and a first adjusting flange 121 of the first MD type top bracket 110 are threadedly fitted on one end; a second fixed flange 112 and a second adjusting flange 122 of the first MD type top bracket 110 are threadedly fitted on the other end; a first stop bolt 131 of the first adjusting flange 121 of the first adjusting flange is provided; and a second stop bolt 132 of the first adjusting flange 122 of the first adjusting flange is provided.

[0039] The secondary rear-end adjustment device 200 includes a second MD-type top bracket 210; a connecting pipe 201 is threaded onto one end of the second MD-type top bracket 210; a first fixed flange 211 and a first adjusting flange 221 of the secondary rear-end adjustment device are threaded onto the other end of the second MD-type top bracket 210; a first stop bolt 231 of the secondary rear-end adjustment device is provided on the connecting pipe 201; and a second stop bolt 232 of the secondary rear-end adjustment device is provided on the first adjusting flange 221 of the secondary rear-end adjustment device.

[0040] The diameters of the first fixed flange 111 of the first-end adjusting device, the second fixed flange 112 of the first-end adjusting device, and the first fixed flange 211 of the second-end adjusting device are all 100-200mm, and the thickness is all 10-20mm; the diameters of the first adjusting flange 121 of the first-end adjusting device, the second adjusting flange 122 of the first-end adjusting device, and the first adjusting flange 221 of the second-end adjusting device are all 150-300mm, and the thickness is all 20-40mm; the diameters of the first stop bolt 131 of the first-end adjusting device, the second stop bolt 132 of the first-end adjusting device, the first stop bolt 231 of the second-end adjusting device, and the second stop bolt 232 of the second-end adjusting device are all 10-30mm, and the length is 150-250mm.

[0041] The model numbers of the first MD type top code 110 and the second MD type top code 210 are both MD-20.

[0042] The length of the connecting pipe 201 is 20-80mm. The first adjusting flange 121, the second adjusting flange 122, and the first adjusting flange 221 of the first adjusting device adjust the position of the first and second base pieces by rotation. The first fixing flange 111, the second fixing flange 112, and the first fixing flange 211 of the second adjusting device are used to fix the adjusted position of the first and second base pieces.

[0043] After the single-piece adjustment of the machine base is completed, the first stop bolt 131 of the first end adjustment device, the second stop bolt 132 of the first end adjustment device, the first stop bolt 231 of the second end adjustment device, and the second stop bolt 232 of the second end adjustment device are used to lock the positions of the first adjusting flange 121 and the first MD type top code 110, the second adjusting flange 122 of the first end adjustment device and the first MD type top code 110, the connecting pipe 201 and the second MD type top code 210, and the first adjusting flange 221 of the second end adjustment device and the second MD type top code 210, respectively.

[0044] A method for installing and adjusting a single-piece mounting and adjusting device for a large low-speed marine methanol main engine base includes the following steps:

[0045] S1: Fix the single piece of the first end base and adjust its perpendicularity to the bottom surface of the base;

[0046] S2: Use the first-end adjustment device 100 to adjust the distance between the first-end base plate and the second base plate, as well as the perpendicularity of the first-end base plate, the second base plate, and the bottom surface of the base.

[0047] First, screw the first fixed flange 111 and the second fixed flange 112 of the first end adjustment device into both ends of the first MD type top bracket 110, so that the distance between the first fixed flange 121 and the second fixed flange 112 of the first end adjustment device is less than the distance between the single piece of the first end base and the single piece of the second base.

[0048] Next, adjust the length of the first MD type top code 110 and insert both ends of the first MD type top code 110 into the adjustment holes of the first end base piece and the second base piece, respectively.

[0049] Next, screw the first adjusting flange 121 of the head-end adjusting device into one end of the first MD type top bracket 110, and screw the second adjusting flange 122 of the head-end adjusting device into the other end of the first MD type top bracket 110.

[0050] Then adjust the distance between the first base plate and the second base plate, as well as the perpendicularity of the first base plate, the second base plate, and the bottom surface of the base.

[0051] Finally, the first adjusting flange 121 of the first end adjusting device and the first fixed flange 111 of the first end adjusting device are used to clamp and position the single piece of the first end base, and the first stop bolt 131 of the first end adjusting device is used to fix it; the second adjusting flange 122 of the first end adjusting device and the second fixed flange 112 of the first end adjusting device are used to clamp and position the single piece of the second base, and the second stop bolt 132 of the first end adjusting device is used to fix it.

[0052] S3: The position of each individual chip on the subsequent base and its perpendicularity to the bottom surface of the base are adjusted sequentially using the secondary rear adjustment device 200 until the adjustment of all individual chips is completed.

[0053] First, screw the connecting pipe 201 of the secondary rear adjustment device 200 and the first fixed flange 211 of the secondary rear adjustment device into the two ends of the second MD type top bracket 210, so that the distance between the outer end face of the connecting pipe 201 and the outer end face of the first fixed flange 211 of the secondary rear adjustment device is less than the distance between the second base piece and the third base piece.

[0054] Next, adjust the length of the second MD type top code 210, screw one end of the connecting pipe 201 into one end of the first MD type top code 110, insert the other end of the second MD type top code 210 into the adjustment hole of the third base single piece, and then screw the first adjusting flange 221 of the secondary rear end adjustment device into one end of the second MD type top code 210.

[0055] Adjust the position of the second base chip and the distance between the second base chip and the third base chip, as well as the perpendicularity of the second base chip, the third base chip and the bottom surface of the base;

[0056] The third base piece is clamped by the first fixed flange 211 of the secondary rear adjustment device and the first adjusting flange 221 of the secondary rear adjustment device, and then fixed by the second stop bolt 232 of the secondary rear adjustment device.

[0057] Repeat step S3 above until all individual chips are adjusted and all base chips are adjusted.

[0058] In steps S2 and S3, the first MD type top code 110 and the second MD type top code 210 are used to fine-tune the distance between the single pieces of the machine base. The first adjusting flange 121, the second adjusting flange 122, and the first adjusting flange 221 of the first adjusting device are used to coarsely adjust the distance between the single pieces of the machine base. The first stop bolt 131, the second stop bolt 132, the first stop bolt 231, and the second stop bolt 232 of the first adjusting device are used to finally fix the position of the single piece of the machine base.

[0059] Device Structure Description

[0060] like Figure 1 As shown: First-end adjustment device 100, Second-end adjustment device 200:

[0061] The first MD type top code 110 and the second MD type top code 210 are both model MD-20, made of high-strength alloy steel, and are used to precisely adjust the gap between the single pieces of the base.

[0062] The diameter of the first fixed flange 111 of the first end adjustment device, the second fixed flange 112 of the first end adjustment device, and the first fixed flange 211 of the second end adjustment device are all 150mm and the thickness is 15mm. They are connected to the machine base piece by bolts to provide initial fixation.

[0063] The diameter of the first adjusting flange 121 of the first adjusting device, the second adjusting flange 122 of the first adjusting device, and the first adjusting flange 221 of the second adjusting device are all 200mm and 30mm, respectively. They are equipped with threaded holes and the horizontal distance is adjusted by rotation.

[0064] The diameter of the first stop bolt 131 of the first end adjustment device, the second stop bolt 132 of the first end adjustment device, the first stop bolt 231 of the second end adjustment device, and the second stop bolt 232 of the second end adjustment device are all 20mm and the length is all 200mm. They adopt an anti-loosening design to ensure the stability of the position after adjustment.

[0065] The length of the connecting pipe 201 is determined according to the spacing of the single piece of the base. Its two ends are connected to the second MD type top code 210 through the second adjusting flange 122 of the first end adjustment device to ensure the rigidity of the overall structure.

[0066] The installation and operation process of this embodiment is as follows:

[0067] Step 1: Fix the first end base piece and adjust its perpendicularity to the bottom surface of the base;

[0068] Step 2: Use the first-end adjustment device 100 to adjust the distance between the first-end base plate and the second base plate, as well as the perpendicularity of the first-end base plate, the second base plate, and the bottom surface of the base.

[0069] First, screw the first fixed flange 111 and the second fixed flange 112 of the first end adjustment device into both ends of the first MD type top bracket 110, so that the distance between the first fixed flange 121 and the second fixed flange 112 of the first end adjustment device is less than the distance between the single piece of the first end base and the single piece of the second base.

[0070] Next, adjust the length of the first MD type top code 110 and insert both ends of the first MD type top code 110 into the adjustment holes of the first end base piece and the second base piece, respectively.

[0071] Next, screw the first adjusting flange 121 of the head-end adjusting device into one end of the first MD type top bracket 110, and screw the second adjusting flange 122 of the head-end adjusting device into the other end of the first MD type top bracket 110.

[0072] Then adjust the distance between the first base plate and the second base plate, as well as the perpendicularity of the first base plate, the second base plate, and the bottom surface of the base.

[0073] Finally, the first adjusting flange 121 of the first end adjusting device and the first fixed flange 111 of the first end adjusting device are used to clamp and position the single piece of the first end base, and the first stop bolt 131 of the first end adjusting device is used to fix it; the second adjusting flange 122 of the first end adjusting device and the second fixed flange 112 of the first end adjusting device are used to clamp and position the single piece of the second base, and the second stop bolt 132 of the first end adjusting device is used to fix it.

[0074] Step 3: Using the secondary rear-end adjustment device 200, sequentially adjust the position of each subsequent base unit and its perpendicularity to the base bottom surface until the adjustment of all units is completed.

[0075] First, screw the connecting pipe 201 of the secondary rear adjustment device 200 and the first fixed flange 211 of the secondary rear adjustment device into the two ends of the second MD type top bracket 210, so that the distance between the outer end face of the connecting pipe 201 and the outer end face of the first fixed flange 211 of the secondary rear adjustment device is less than the distance between the second base piece and the third base piece.

[0076] Next, adjust the length of the second MD type top code 210, screw one end of the connecting pipe 201 into one end of the first MD type top code 110, insert the other end of the second MD type top code 210 into the adjustment hole of the third base single piece, and then screw the first adjusting flange 221 of the secondary rear end adjustment device into one end of the second MD type top code 210.

[0077] Adjust the position of the second base chip and the distance between the second base chip and the third base chip, as well as the perpendicularity of the second base chip, the third base chip and the bottom surface of the base;

[0078] The third base piece is clamped by the first fixed flange 211 of the secondary rear adjustment device and the first adjusting flange 221 of the secondary rear adjustment device, and then fixed by the second stop bolt 232 of the secondary rear adjustment device.

[0079] Repeat step S3 above until all individual chips are adjusted and all base chips are adjusted.

[0080] After all the base plates have been individually adjusted, use a total station to check the overall straightness and perpendicularity. The error must be controlled within ±0.5mm.

[0081] Taking the marine methanol main engine base of this embodiment as an example, the spacing between the single pieces of the base is 1200mm. After using this device, the adjustment time is shortened from 8 hours in the traditional method to 5 hours, and the verticality deviation is optimized from ±1.2mm to ±0.4mm, which significantly improves the assembly accuracy.

[0082] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A single-piece mounting and adjustment device for a large, low-speed marine methanol main engine base, characterized in that, The device includes a first-end adjustment device (100) and multiple second-end adjustment devices (200); the second-end adjustment devices (200) are equipped with connecting pipes (201); the first-end adjustment device (100) is used to fix and adjust the distance between the first-end base piece and the second base piece, and the perpendicularity of the first-end base piece and the second base piece to the bottom surface of the base; the second-end adjustment devices (200) are connected to the first-end adjustment device (100) through connecting pipes (201) and are used to adjust the distance between the subsequent base pieces and their perpendicularity to the bottom surface of the base; the first-end adjustment device (100) includes a first MD type top bracket (110); one end of the first MD type top bracket (110) is threaded with... The device is equipped with a first fixed flange (111) and a first adjusting flange (121) for the first end adjustment device; a second fixed flange (112) and a second adjusting flange (122) for the first end adjustment device are threaded onto the other end of the first MD type top bracket (110); a first stop bolt (131) for the first end adjustment device is provided on the first adjusting flange (121); a second stop bolt (132) for the first end adjustment device is provided on the second adjusting flange (122); the secondary rear end adjustment device (200) includes a second MD type top bracket (210); a connecting pipe is threaded onto one end of the second MD type top bracket (210). (201); The other end of the second MD type top bracket (210) is threaded with a first fixed flange (211) of the secondary rear end adjustment device and a first adjusting flange (221) of the secondary rear end adjustment device; the connecting pipe (201) is provided with a first stop bolt (231) of the secondary rear end adjustment device; the first adjusting flange (221) of the secondary rear end adjustment device is provided with a second stop bolt (232) of the secondary rear end adjustment device; the diameters of the first fixed flange (111) of the first end adjustment device, the second fixed flange (112) of the first end adjustment device, and the first fixed flange (211) of the secondary rear end adjustment device are all 100-200mm, and the thicknesses are all 10-20mm; the first adjusting flange of the first end adjustment device... The diameters of flange (121), the second adjusting flange (122) of the first adjusting device, and the first adjusting flange (221) of the second adjusting device are all 150-300mm, and the thicknesses are all 20-40mm; the diameters of the first stop bolt (131) of the first adjusting device, the second stop bolt (132) of the first adjusting device, the first stop bolt (231) of the second adjusting device, and the second stop bolt (232) of the second adjusting device are all 10-30mm, and the lengths are 150-250mm; the model of the first MD type top bracket (110) and the second MD type top bracket (210) are both MD-20; the length of the connecting pipe (201) is 20-80mm.The first adjusting flange (121), second adjusting flange (122), and first adjusting flange (221) of the first-end adjusting device and the second adjusting flange of the second-end adjusting device are used to adjust the positions of the first-end base piece and the second base piece by rotation. The first fixing flange (111), second fixing flange (112), and first fixing flange (211) of the first-end adjusting device and the second fixing flange of the second-end adjusting device are used to fix the adjusted positions of the first-end base piece and the second base piece.

2. The single-piece mounting and adjustment device for a large low-speed marine methanol main engine base according to claim 1, characterized in that, The first stop bolt (131) of the first end adjustment device, the second stop bolt (132) of the first end adjustment device, the first stop bolt (231) of the second end adjustment device, and the second stop bolt (232) of the second end adjustment device are used to lock the positions of the first adjusting flange (121) and the first MD type top code (110), the second adjusting flange (122) of the first end adjustment device and the first MD type top code (110), the connecting pipe (201) and the second MD type top code (210), and the first adjusting flange (221) of the second end adjustment device and the second MD type top code (210) respectively after the single piece of the machine base is adjusted.

3. The method for installing and adjusting a single piece of a large low-speed marine methanol main engine base using the single-piece mounting and adjusting device described in claim 2, characterized in that, Includes the following steps: S1: Fix the single piece of the first end base and adjust its perpendicularity to the bottom surface of the base; S2: Use the first-end adjustment device (100) to adjust the distance between the first-end base plate and the second base plate, as well as the perpendicularity of the first-end base plate, the second base plate, and the bottom surface of the base. First, screw the first fixed flange (111) and the second fixed flange (112) of the first end adjustment device into the two ends of the first MD type top bracket (110) respectively, so that the distance between the first fixed flange (111) and the second fixed flange (112) of the first end adjustment device is less than the distance between the single piece of the first end base and the single piece of the second base. Next, adjust the length of the first MD type top code (110) and insert both ends of the first MD type top code (110) into the adjustment holes of the first end base piece and the second base piece, respectively. Next, screw the first adjusting flange (121) of the head-end adjustment device into one end of the first MD type top bracket (110), and screw the second adjusting flange (122) of the head-end adjustment device into the other end of the first MD type top bracket (110). Then adjust the distance between the first base plate and the second base plate, as well as the perpendicularity of the first base plate, the second base plate, and the bottom surface of the base. Finally, the first adjusting flange (121) of the first end adjusting device and the first fixed flange (111) of the first end adjusting device are used to clamp and position the single piece of the first end base, and the first stop bolt (131) of the first end adjusting device is used to fix it; the second adjusting flange (122) of the first end adjusting device and the second fixed flange (112) of the first end adjusting device are used to clamp and position the single piece of the second base, and the second stop bolt (132) of the first end adjusting device is used to fix it. S3: The position of each subsequent base chip and its perpendicularity to the bottom surface of the base are adjusted sequentially using the secondary rear adjustment device (200) until the adjustment of all chips is completed. First, screw the connecting pipe (201) of the secondary rear end adjustment device (200) and the first fixed flange (211) of the secondary rear end adjustment device into the two ends of the second MD type top bracket (210) respectively, so that the distance between the outer end face of the connecting pipe (201) and the outer end face of the first fixed flange (211) of the secondary rear end adjustment device is less than the distance between the second base plate and the third base plate. Next, adjust the length of the second MD type top bracket (210), screw one end of the connecting pipe (201) into one end of the first MD type top bracket (110), insert the other end of the second MD type top bracket (210) into the adjustment hole of the third base plate, and then screw the first adjusting flange (221) of the secondary rear end adjustment device into one end of the second MD type top bracket (210). Adjust the position of the second base chip and the distance between the second base chip and the third base chip, as well as the perpendicularity of the second base chip, the third base chip and the bottom surface of the base; The third base piece is clamped by the first fixed flange (211) of the secondary rear adjustment device and the first adjusting flange (221) of the secondary rear adjustment device, and fixed by the second stop bolt (232) of the secondary rear adjustment device. Repeat step S3 above until all individual chips are adjusted and all base chips are adjusted.

4. The method according to claim 3, characterized in that, In steps S2 and S3, the first MD type top code (110) and the second MD type top code (210) are used to fine-tune the distance between the single pieces of the machine base. The first adjusting flange (121), the second adjusting flange (122), and the first adjusting flange (221) of the first adjusting device are used to coarsely adjust the distance between the single pieces of the machine base. The first stop bolt (131), the second stop bolt (132), the first stop bolt (231), and the second stop bolt (232) of the first adjusting device are used to finally fix the position of the single piece of the machine base.

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