Single piece alignment method and device for methanol main engine base for large low-speed ship

Abstract

The invention belongs to the field of low-speed marine methanol main engine manufacturing, and particularly relates to a large low-speed marine methanol main engine base single piece alignment method and device. The device comprises a head end alignment device (100) and a plurality of secondary rear end alignment devices (200), a connecting pipe (201) is arranged on the secondary rear end aligning device (200); the head end aligning device (100) is used for fixing and adjusting the distance between the head end machine base single piece and the second machine base single piece and the perpendicularity between the head end machine base single piece and the bottom face of the machine base and between the second machine base single piece and the bottom face of the machine base. The secondary rear end alignment device (200) is connected with the head end alignment device (100) through a connecting pipe (201) and used for adjusting the distance between subsequent single pieces of the machine base and the perpendicularity between the subsequent single pieces of the machine base and the bottom face of the machine base. According to the device and method, alignment is achieved, repeated welding and cutting are not needed, a single set of device can complete all operation, installation and alignment are convenient, efficiency is improved, time is saved, and safety risks are reduced.

Description

Technical Field

[0001] The present invention belongs to the field of manufacturing low-speed marine methanol main engines, and particularly relates to a method and device for single-piece adjustment of the bedplate of a large low-speed marine methanol main engine. Background Art

[0002] Compared with traditional fuel engines, methanol main engines for large low-speed marine methanol main engines can significantly reduce emissions of nitrogen oxides, sulfur oxides, particulate matter, and greenhouse gases. Methanol as a fuel has more advantages than liquefied natural gas in aspects such as ship storage, transportation, and use.

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

[0004] For the single-piece adjustment of the bedplate of a large low-speed marine methanol main engine in the prior art, temporary support ribs need to be welded to the components of the single-piece bedplate, which violates the specifications; the welding process is time-consuming and has safety hazards; different models require different adjustment devices, with poor versatility, low installation and positioning efficiency, and low assembly accuracy. Summary of the Invention

[0005] In order to solve the problems in the single-piece adjustment of the bedplate of a large low-speed marine methanol main engine in the prior art, such as that temporary support ribs need to be welded to the components of the single-piece bedplate, which violates the specifications; the welding process is time-consuming and has safety hazards; different models require different adjustment devices, with poor versatility, low assembly accuracy, and low installation and positioning efficiency, the present invention provides a device for single-piece installation and adjustment of the bedplate of a large low-speed marine methanol main engine, including a front-end adjustment device and a plurality of sub-rear-end adjustment devices; a connecting pipe is provided on the sub-rear-end adjustment device; the front-end adjustment device is used to fix and adjust the distance between the front-end single-piece bedplate and the second single-piece bedplate and the perpendicularity between the front-end single-piece bedplate, the second single-piece bedplate and the bottom surface of the bedplate; the sub-rear-end adjustment device is connected to the front-end adjustment device through the connecting pipe and is used to adjust the distance between the subsequent single-piece bedplates and their perpendicularity to the bottom surface of the bedplate.

[0006] According to a single-piece installation and adjustment device for a large low-speed marine methanol main engine pedestal described above, the front-end adjustment device includes a first MD type top code; a first fixed flange and a first adjustment flange of the front-end adjustment device are arranged in a threaded fit at one end of the first MD type top code; a second fixed flange and a second adjustment flange of the front-end adjustment device are arranged in a threaded fit at the other end of the first MD type top code; a first stop bolt of the front-end adjustment device is arranged on the first adjustment flange of the front-end adjustment device; a second stop bolt of the front-end adjustment device is arranged on the second adjustment flange of the front-end adjustment device.

[0007] According to a single-piece installation and adjustment device for a large low-speed marine methanol main engine pedestal described above, the sub-rear-end adjustment device includes a second MD type top code; a connecting pipe is arranged in a threaded fit at one end of the second MD type top code; a first fixed flange and a first adjustment flange of the sub-rear-end adjustment device are arranged in a threaded fit at the other end of the second MD type top code; a first stop bolt of the sub-rear-end adjustment device is arranged on the connecting pipe; a second stop bolt of the sub-rear-end adjustment device is arranged on the first adjustment flange of the sub-rear-end adjustment device.

[0008] According to a single-piece installation and adjustment device for a large low-speed marine methanol main engine pedestal described above, the diameters of the first fixed flange of the front-end adjustment device, the second fixed flange of the front-end adjustment device, and the first fixed flange of the sub-rear-end adjustment device are all 100 - 200 mm, and the thicknesses are all 10 - 20 mm; the diameters of the first adjustment flange of the front-end adjustment device, the second adjustment flange of the front-end adjustment device, and the first adjustment flange of the sub-rear-end adjustment device are all 150 - 300 mm, and the thicknesses are all 20 - 40 mm; the diameters of 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 sub-rear-end adjustment device, and the second stop bolt of the sub-rear-end adjustment device are all 10 - 30 mm, and the lengths are 150 - 250 mm.

[0009] According to a single-piece installation and adjustment device for a large low-speed marine methanol main engine pedestal described above, the models of the first MD type top code and the second MD type top code are both MD-20, and their sizes are determined according to the bearing weight and installation spacing of the single piece of the pedestal.

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

[0011] According to the single-piece installation and adjustment device for the large low-speed marine methanol main engine seat described above, the first adjustment flange of the front-end adjustment device, the second adjustment flange of the front-end adjustment device, and the first adjustment flange of the sub-rear-end adjustment device adjust the positions of the front-end seat single piece and the second seat single piece by rotation. The first fixing flange of the front-end adjustment device, the second fixing flange of the front-end adjustment device, and the first fixing flange of the sub-rear-end adjustment device are used to fix the positions of the front-end seat single piece and the second seat single piece after adjustment.

[0012] According to the single-piece installation and adjustment device for the large low-speed marine methanol main engine seat described above, it is characterized in that 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 sub-rear-end adjustment device, and the second stop bolt of the sub-rear-end adjustment device are respectively used to lock the positions of the first adjustment flange and the first MD-type top code, the second adjustment 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 adjustment flange of the sub-rear-end adjustment device and the second MD-type top code after the adjustment of the seat single piece is completed.

[0013] According to the method for adjusting the single-piece of the large low-speed marine methanol main engine seat by using the single-piece installation and adjustment device for the large low-speed marine methanol main engine seat described above, the method includes the following steps:

[0014] S1: Fix the front-end seat single piece and adjust its perpendicularity to the bottom surface of the seat;

[0015] S2: Use the front-end adjustment device to adjust the distance between the front-end seat single piece and the second seat single piece and the perpendicularity of the front-end seat single piece and the second seat single piece to the bottom surface of the seat;

[0016] First, screw the first fixing flange of the front-end adjustment device and the second fixing flange of the front-end adjustment device into both ends of the first MD-type top code respectively, so that the distance between the first fixing flange of the front-end adjustment device and the second fixing flange of the front-end adjustment device is less than the distance between the front-end seat single piece and the second seat single piece;

[0017] Then, 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 front-end seat single piece and the second seat single piece respectively;

[0018] Next, screw the first adjustment flange of the front-end adjustment device into one end of the first MD-type top code, and screw the second adjustment flange of the front-end adjustment device into the other end of the first MD-type top code.

[0019] Then, adjust the distance between the front-end seat single piece and the second seat single piece and the perpendicularity of the front-end seat single piece and the second seat single piece to the bottom surface of the seat;

[0020] Finally, use the first adjusting flange of the head-end adjusting device to cooperate with the first fixed flange of the head-end adjusting device to clamp and position the position of the single piece of the head-end machine base, and fix it with the first stop bolt of the head-end adjusting device; use the second adjusting flange of the head-end adjusting device to cooperate with the second fixed flange of the head-end adjusting device to clamp and position the second single piece of the machine base, and fix it with the second stop bolt of the head-end adjusting device;

[0021] S3: Adjust the positions of the subsequent single pieces of the machine base and their perpendicularity to the bottom surface of the machine base in sequence through the sub-rear-end adjusting device until the adjustment of all single pieces is completed:

[0022] First, screw the connecting pipe of the sub-rear-end adjusting device and the first fixed flange of the sub-rear-end adjusting device into both ends of the second MD-type top code respectively, so that the distance between the outer end surface of the connecting pipe and the outer end surface of the first fixed flange of the sub-rear-end adjusting device is less than the distance between the second single piece of the machine base and the third single piece of the machine base;

[0023] Then, 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 single piece of the machine base, and then screw the first adjusting flange of the sub-rear-end adjusting device into one end of the second MD-type top code;

[0024] Adjust the position of the second single piece of the machine base and adjust the distance between the second single piece of the machine base and the third single piece of the machine base and the perpendicularity of the second single piece of the machine base and the third single piece of the machine base to the bottom surface of the machine base;

[0025] Use the first fixed flange of the sub-rear-end adjusting device to cooperate with the first adjusting flange of the sub-rear-end adjusting device to clamp the third single piece of the machine base, and fix it with the second stop bolt of the sub-rear-end adjusting device;

[0026] Repeat the above step S3 until the adjustment of all single pieces of all machine bases is completed.

[0027] According to the above-mentioned method for installing and adjusting single pieces of the large low-speed marine methanol main engine base, in steps S2 and S3, the first MD-type top code and the second MD-type top code are used to finely adjust the distance between single pieces of the machine base, the first adjusting flange of the head-end adjusting device, the second adjusting flange of the head-end adjusting device, and the first adjusting flange of the sub-rear-end adjusting device are used to roughly adjust the distance between single pieces of the machine base, and the first stop bolt of the head-end adjusting device, the second stop bolt of the head-end adjusting device, the first stop bolt of the sub-rear-end adjusting device, and the second stop bolt of the sub-rear-end adjusting device are used to finally fix the positions of single pieces of the machine base.

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

[0029] 1. The present invention uses a head-end adjustment device and multiple sub-rear-end adjustment devices; a connecting pipe is provided on the sub-rear-end adjustment device; the head-end adjustment device is used to fix and adjust the distance and perpendicularity between the single base plate of the head-end position and the adjacent single base plate; the sub-rear-end adjustment device is connected to the head-end adjustment device through the connecting pipe, and is used to adjust the distance and perpendicularity between the subsequent single base plates, thereby replacing the welding method: replacing welding with a mechanical device, avoiding the use of temporary support ribs for welding during the installation and adjustment of the single base plate, meeting the specification requirements that temporary support ribs are not allowed to be welded on the components of the marine methanol main engine single base plate, and improving the assembly accuracy.

[0030] 2. The present invention uses MD type top codes. By replacing connecting pipes of different lengths and adjusting the flange positions, it has a universal structure, and one set of device is applicable to multiple models, reducing equipment costs and storage space.

[0031] 3. The present invention uses the head-end adjustment device to fix and adjust the distance between the single base plate of the head-end and the second single base plate and its perpendicularity to the bottom surface; the modular structure in which the sub-rear-end adjustment device is connected to the head-end adjustment device through the connecting pipe, and the combined design of the head-end and sub-rear-end adjustment devices. During the adjustment process, there is no need for repeated welding and cutting, and a single set of device can complete all operations, which is convenient for installation and adjustment, improves the adjustment efficiency, saves time and reduces safety risks. Description of the Drawings

[0032] Figure 1 It is a schematic structural diagram of an installation and adjustment device for a single base plate of a large low-speed marine methanol main engine of the present invention.

[0033] Figure 2 It is a schematic diagram of the use of an installation and adjustment device for a single base plate of a large low-speed marine methanol main engine of the present invention.

[0034] In the figure: 100 - head-end adjustment device, 200 - sub-rear-end adjustment device, 201 - connecting pipe, 110 - first MD type top code, 111 - first fixed flange of the head-end adjustment device, 121 - first adjustment flange of the head-end adjustment device, 112 - second fixed flange of the head-end adjustment device, 122 - second adjustment flange of the head-end adjustment device, 131 - first stop bolt of the head-end adjustment device, 132 - second stop bolt of the head-end adjustment device, 210 - second MD type top code, 211 - first fixed flange of the sub-rear-end adjustment device, 221 - first adjustment flange of the sub-rear-end adjustment device, 231 - first stop bolt of the sub-rear-end adjustment device, 232 - second stop bolt of the sub-rear-end adjustment device. Detailed Embodiments

[0035] Preferred Embodiment

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0037] As Figure 1 , Figure 2 shown: In this embodiment, a single-piece installation and adjustment device for a large low-speed marine methanol main engine seat includes a front-end adjustment device 100 and a plurality of sub-rear-end adjustment devices 200; a connecting pipe 201 is provided on the sub-rear-end adjustment device 200; the front-end adjustment device 100 is used to fix and adjust the distance between the front-end seat single piece and the second seat single piece, and the perpendicularity between the front-end seat single piece, the second seat single piece and the seat bottom surface; the sub-rear-end adjustment device 200 is connected to the front-end adjustment device 100 through the connecting pipe 201, and is used to adjust the distance between the subsequent seat single pieces and their perpendicularity to the seat bottom surface.

[0038] The front-end adjustment device 100 includes a first MD-type top code 110; a first fixed flange 111 and a first adjustment flange 121 of the front-end adjustment device are arranged in a threaded fit at one end of the first MD-type top code 110; a second fixed flange 112 and a second adjustment flange 122 of the front-end adjustment device are arranged in a threaded fit at the other end of the first MD-type top code 110; a first stop bolt 131 of the front-end adjustment device is arranged on the first adjustment flange 121 of the front-end adjustment device; a second stop bolt 132 of the front-end adjustment device is arranged on the second adjustment flange 122 of the front-end adjustment device.

[0039] The sub-rear-end adjustment device 200 includes a second MD-type top code 210; the connecting pipe 201 is arranged in a threaded fit at one end of the second MD-type top code 210; a first fixed flange 211 and a first adjustment flange 221 of the sub-rear-end adjustment device are arranged in a threaded fit at the other end of the second MD-type top code 210; a first stop bolt 231 of the sub-rear-end adjustment device is arranged on the connecting pipe 201; a second stop bolt 232 of the sub-rear-end adjustment device is arranged on the first adjustment flange 221 of the sub-rear-end adjustment device.

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

[0041] The models 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 - 80 mm. The first adjusting flange 121 of the head-end alignment device, the second adjusting flange 122 of the head-end alignment device, and the first adjusting flange 221 of the sub-rear-end alignment device adjust the positions of the single-piece head-end machine base and the single-piece second machine base by rotation. The first fixed flange 111 of the head-end alignment device, the second fixed flange 112 of the head-end alignment device, and the first fixed flange 211 of the sub-rear-end alignment device are used to fix the positions of the single-piece head-end machine base and the single-piece second machine base after adjustment.

[0043] After the adjustment of the single-piece machine base is completed, the first stop bolt 131 of the head-end alignment device, the second stop bolt 132 of the head-end alignment device, the first stop bolt 231 of the sub-rear-end alignment device, and the second stop bolt 232 of the sub-rear-end alignment device are respectively 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 head-end alignment 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 sub-rear-end alignment device and the second MD-type top code 210.

[0044] A method for installing and aligning a single-piece base of a large low-speed marine methanol main engine using a single-piece base installation and alignment device for a large low-speed marine methanol main engine includes the following steps:

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

[0046] S2: Use the head-end alignment device 100 to adjust the distance between the single-piece head-end machine base and the single-piece second machine base and the perpendicularity of the single-piece head-end machine base and the single-piece second machine base to the bottom surface of the machine base;

[0047] First, screw the first fixed flange 111 of the head-end alignment device and the second fixed flange 112 of the head-end alignment device into both ends of the first MD-type top code 110 respectively, so that the distance between the first fixed flange 121 of the head-end alignment device and the second fixed flange 112 of the head-end alignment device is less than the distance between the single piece of the head-end machine base and the single piece of the second machine base;

[0048] Then, 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 single piece of the head-end machine base and the single piece of the second machine base respectively;

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

[0050] Then, adjust the distance between the single piece of the head-end machine base and the single piece of the second machine base and the perpendicularity of the single piece of the head-end machine base and the single piece of the second machine base to the bottom surface of the machine base;

[0051] Finally, cooperate the first adjusting flange 121 of the head-end alignment device with the first fixed flange 111 of the head-end alignment device to clamp and position the position of the single piece of the head-end machine base and fix it with the first stop bolt 131 of the head-end alignment device; cooperate the second adjusting flange 122 of the head-end alignment device with the second fixed flange 112 of the head-end alignment device to clamp and position the single piece of the second machine base, and fix it with the second stop bolt 132 of the head-end alignment device;

[0052] S3: Adjust the positions of the subsequent single pieces of the machine base and their perpendicularity to the bottom surface of the machine base in sequence through the sub-rear-end alignment device 200 until the alignment of all single pieces is completed:

[0053] First, screw the connecting pipe 201 of the sub-rear-end alignment device 200 and the first fixed flange 211 of the sub-rear-end alignment device into both ends of the second MD-type top code 210 respectively, so that the distance between the outer end surface of the connecting pipe 201 and the outer end surface of the first fixed flange 211 of the sub-rear-end alignment device is less than the distance between the single piece of the second machine base and the single piece of the third machine base;

[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 single piece of the third machine base, and then screw the first adjusting flange 221 of the sub-rear-end alignment device into one end of the second MD-type top code 210;

[0055] Adjust the position of the single piece of the second machine base and adjust the distance between the single piece of the second machine base and the single piece of the third machine base and the perpendicularity of the single piece of the second machine base and the single piece of the third machine base to the bottom surface of the machine base;

[0056] Use the first fixing flange 211 of the secondary rear-end adjustment device to cooperate with the first adjustment flange 221 of the secondary rear-end adjustment device to clamp the single piece of the third machine base, and fix it with the second stop bolt 232 of the secondary rear-end adjustment device;

[0057] Repeat the above step S3 until the adjustment of all single pieces of the machine base is completed.

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

[0059] Device structure description

[0060] As Figure 1 shown: Front-end adjustment device 100, secondary rear-end adjustment device 200:

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

[0062] The diameters of the first fixing flange 111 of the front-end adjustment device, the second fixing flange 112 of the front-end adjustment device, and the first fixing flange 211 of the secondary rear-end adjustment device are all 150 mm, and the thicknesses are all 15 mm. They are connected to the single piece of the machine base through bolts to provide initial fixation.

[0063] The diameters of the first adjustment flange 121 of the front-end adjustment device, the second adjustment flange 122 of the front-end adjustment device, and the first adjustment flange 221 of the secondary rear-end adjustment device are all 200 mm, and the thicknesses are all 30 mm. Threaded holes are provided inside, and the horizontal distance is adjusted by rotation.

[0064] The diameters of the first stop bolt 131 of the front-end adjustment device, the second stop bolt 132 of the front-end adjustment device, the first stop bolt 231 of the secondary rear-end adjustment device, and the second stop bolt 232 of the secondary rear-end adjustment device are all 20 mm, and the lengths are all 200 mm. They adopt 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 between single pieces of the machine base. Its two ends are connected to the second MD-type top code 210 through the second adjustment flange 122 of the front-end adjustment device to ensure the rigidity of the overall structure.

[0066] Installation and operation process of this embodiment:

[0067] Step 1: Fix the single piece of the front-end seat and adjust its perpendicularity to the bottom surface of the seat;

[0068] Step 2: Use the front-end alignment device 100 to adjust the distance between the single piece of the front-end seat and the single piece of the second seat, and the perpendicularity of the single piece of the front-end seat and the single piece of the second seat to the bottom surface of the seat;

[0069] First, screw the first fixed flange 111 of the front-end alignment device and the second fixed flange 112 of the front-end alignment device into both ends of the first MD-type top code 110 respectively, so that the distance between the first fixed flange 121 of the front-end alignment device and the second fixed flange 112 of the front-end alignment device is less than the distance between the single piece of the front-end seat and the single piece of the second seat;

[0070] Then, 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 single piece of the front-end seat and the single piece of the second seat respectively;

[0071] Next, screw the first adjustment flange 121 of the front-end alignment device into one end of the first MD-type top code 110, and screw the second adjustment flange 122 of the front-end alignment device into the other end of the first MD-type top code 110,

[0072] Then, adjust the distance between the single piece of the front-end seat and the single piece of the second seat, and the perpendicularity of the single piece of the front-end seat and the single piece of the second seat to the bottom surface of the seat;

[0073] Finally, use the first adjustment flange 121 of the front-end alignment device and the first fixed flange 111 of the front-end alignment device to cooperate and clamp and position the position of the single piece of the front-end seat and fix it with the first stop bolt 131 of the front-end alignment device; use the second adjustment flange 122 of the front-end alignment device and the second fixed flange 112 of the front-end alignment device to cooperate and clamp and position the single piece of the second seat, and fix it with the second stop bolt 132 of the front-end alignment device;

[0074] Step 3: Adjust the positions of the subsequent single pieces of the seat and their perpendicularity to the bottom surface of the seat in sequence through the sub-rear-end alignment device 200 until the adjustment of all single pieces is completed:

[0075] First, screw the connecting pipe 201 of the sub-rear-end alignment device 200 and the first fixed flange 211 of the sub-rear-end alignment device into both ends of the second MD-type top code 210 respectively, so that the distance between the outer end surface of the connecting pipe 201 and the outer end surface of the first fixed flange 211 of the sub-rear-end alignment device is less than the distance between the single piece of the second seat and the single piece of the third seat;

[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 single base, and then screw the first adjusting flange 221 of the sub-rear-end alignment device into one end of the second MD-type top code 210.

[0077] Adjust the position of the second single base and the distance between the second single base and the third single base, as well as the perpendicularity of the second single base, the third single base to the bottom surface of the base.

[0078] Use the first fixing flange 211 of the sub-rear-end alignment device to cooperate with the first adjusting flange 221 of the sub-rear-end alignment device to clamp the third single base, and fix it with the second stop bolt 232 of the sub-rear-end alignment device.

[0079] Repeat the above step S3 until all single bases are aligned.

[0080] After all single bases of the base are aligned, use a total station to detect the overall straightness and perpendicularity, and the error needs to be controlled within ±0.5 mm.

[0081] Taking the base of the marine methanol main engine in this embodiment as an example, the distance between single bases is 1200 mm. After using this device, the alignment time is shortened from 8 hours by the traditional method to 5 hours, and the perpendicularity deviation is optimized from ±1.2 mm to ±0.4 mm, significantly improving the assembly accuracy.

[0082] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A single-piece installation and adjustment device for a large low-speed marine methanol main engine, characterized in that: The invention comprises a head end adjusting device (100) and a plurality of secondary rear end adjusting devices (200); the secondary rear end adjusting device (200) is provided with a connecting pipe (201); the head end adjusting device (100) is used to fix and adjust the distance between the head end machine base single piece and the second machine base single piece and the verticality between the head end machine base single piece and the second machine base single piece and the machine base bottom surface; the secondary rear end adjusting device (200) is connected to the head end adjusting device (100) through the connecting pipe (201) and is used to adjust the distance between subsequent machine base single pieces and the verticality between the subsequent machine base single pieces and the machine base bottom surface.

2. A large-scale low-speed marine methanol main engine base single-piece installation and adjustment device according to claim 1, characterized in that: The head end adjustment device (100) comprises a first MD type top bracket (110); a first fixing flange (111) of the head end adjustment device and a first adjusting flange (121) of the head end adjustment device are arranged on a thread at one end of the first MD type top bracket (110); a second fixing flange (112) of the head end adjustment device and a second adjusting flange (122) of the head end adjustment device are arranged on a thread at the other end of the first MD type top bracket (110); a first stopping bolt (131) of the head end adjustment device is arranged on the first adjusting flange (121); and a second stopping bolt (132) of the head end adjustment device is arranged on the second adjusting flange (122) of the head end adjustment device.

3. A large-scale low-speed marine methanol main engine base single-piece installation and adjustment device according to claim 2, characterized in that: The secondary rear end adjustment device (200) comprises a second MD type top bracket (210); a connecting pipe (201) is provided on the thread at one end of the second MD type top bracket (210); a first fixing flange (211) of the secondary rear end adjustment device and a first adjusting flange (221) of the secondary rear end adjustment device are provided on the thread at the other end of the second MD type top bracket (210); a first stopping bolt (231) of the secondary rear end adjustment device is provided on the connecting pipe (201); and a second stopping bolt (232) of the secondary rear end adjustment device is provided on the first adjusting flange (221) of the secondary rear end adjustment device.

4. A large-scale low-speed marine methanol main engine base single-piece installation and adjustment device according to claim 3, characterized in that: The diameters of the first fixing flange (111) of the head end adjusting device, the second fixing flange (112) of the head end adjusting device, and the first fixing flange (211) of the secondary rear end adjusting device are all 100-200 mm, and the thicknesses are all 10-20 mm; the diameters of the first adjusting flange (121) of the head end adjusting device, the second adjusting flange (122) of the head end adjusting device, and the first adjusting flange (221) of the secondary rear end adjusting device are all 150-300 mm, and the thicknesses are all 20-40 mm; the diameters of the first stopping bolt (131) of the head end adjusting device, the second stopping bolt (132) of the head end adjusting device, the first stopping bolt (231) of the secondary rear end adjusting device, and the second stopping bolt (232) of the secondary rear end adjusting device are all 10-30 mm, and the lengths are 150-250 mm.

5. A large-scale low-speed marine methanol main engine base single-piece installation and adjustment device according to claim 4, characterized in that: The model of the first MD type top code (110) and the second MD type top code (210) are both MD-20.

6. A large-scale low-speed marine methanol main engine base single-piece installation and adjustment device according to claim 5, characterized in that: The length of the connecting pipe (201) is 20-80 mm.

7. A large-scale low-speed marine methanol main engine base single-piece installation and adjustment device according to claim 6, characterized in that: The first adjusting flange (121) of the head end adjusting device, the second adjusting flange (122) of the head end adjusting device, and the first adjusting flange (221) of the secondary rear end adjusting device adjust the positions of the head end machine base single piece and the second machine base single piece by rotation, and the first fixing flange (111) of the head end adjusting device, the second fixing flange (112) of the head end adjusting device, and the first fixing flange (211) of the secondary rear end adjusting device are used to fix the positions of the head end machine base single piece and the second machine base single piece after adjustment.

8. A large-scale low-speed marine methanol main engine base single-piece installation and adjustment device according to claim 7, characterized in that: The first stop bolt (131) of the head end adjustment device, the second stop bolt (132) of the head end adjustment device, the first stop bolt (231) of the secondary rear end adjustment device, and the second stop bolt (232) of the secondary rear end adjustment device are used to respectively lock the positions of the first adjustment flange (121) and the first MD type top bracket (110), the second adjustment flange (122) of the head end adjustment device and the first MD type top bracket (110), the connecting pipe (201) and the second MD type top bracket (210), and the first adjustment flange (221) of the secondary rear end adjustment device and the second MD type top bracket (210) after the single-piece adjustment of the machine base is completed.

9. A method for installing and adjusting a large-scale low-speed marine methanol main engine base monolithic installation and adjustment device according to claim 8, characterized in that: The following steps are involved: S1: Fix the head end machine base monolithic piece and adjust its verticality with the bottom surface of the machine base; S2: using the head end adjusting device (100) to adjust the distance between the head end machine base single piece and the second machine base single piece and the verticality between the head end machine base single piece, the second machine base single piece and the machine base bottom surface; First, the first fixing flange (111) of the head end adjusting device and the second fixing flange (112) of the head end adjusting device are screwed into the two ends of the first MD type top bracket (110) respectively, so that the distance between the first fixing flange (121) of the head end adjusting device and the second fixing flange (112) of the head end adjusting device is smaller than the distance between the head end machine base single piece and the second machine base single piece; Then, the length of the first MD type top bracket (110) is adjusted, and the two ends of the first MD type top bracket (110) are respectively inserted into the adjustment holes of the first end machine base single piece and the second machine base single piece; Then, the first adjusting flange (121) of the head end adjusting device is screwed into one end of the first MD type top bracket (110), and the second adjusting flange (122) of the head end adjusting device is screwed into the other end of the first MD type top bracket (110). Then adjust the distance between the first end machine base single piece and the second machine base single piece and the verticality between the first end machine base single piece, the second machine base single piece and the bottom surface of the machine base; Finally, the first adjusting flange (121) of the head end adjusting device cooperates with the first fixing flange (111) of the head end adjusting device to clamp and locate the position of the head end machine base single piece and fix it with the first stopping bolt (131) of the head end adjusting device; the second adjusting flange (122) of the head end adjusting device cooperates with the second fixing flange (112) of the head end adjusting device to clamp and locate the second machine base single piece and fix it with the second stopping bolt (132) of the head end adjusting device; S3: The positions of the subsequent machine base sheets and their verticality with the bottom surface of the machine base are adjusted in sequence by the secondary rear end adjustment device (200) until all sheets are adjusted: First, the connecting pipe (201) of the secondary rear end adjusting device (200) and the first fixing flange (211) of the secondary rear end adjusting device are screwed into the two ends of the second MD type top bracket (210) respectively, so that the distance between the outer end surface of the connecting pipe (201) and the outer end surface of the first fixing flange (211) of the secondary rear end adjusting device is smaller than the distance between the second machine base single piece and the third machine base single piece; Then, the length of the second MD type top bracket (210) is adjusted, one end of the connecting tube (201) is screwed into one end of the first MD type top bracket (110), the other end of the second MD type top bracket (210) is inserted into the adjustment hole of the third machine base monolithic sheet, and then the first adjustment flange (221) of the secondary rear end adjustment device is screwed into one end of the second MD type top bracket (210); Adjust the position of the second base single piece and adjust the distance between the second base single piece and the third base single piece and the verticality of the second base single piece, the third base single piece and the base bottom surface; The third machine base single piece is clamped by the first fixing flange (211) of the secondary rear end adjusting device and the first adjusting flange (221) of the secondary rear end adjusting device, and is fixed by the second stopping bolt (232) of the secondary rear end adjusting device; Repeat the above step S3 until all the single pieces are adjusted and all the base single pieces are adjusted.

10. The installation and adjustment method of a single-chip installation and adjustment device for a large-scale low-speed marine methanol main engine base according to claim 9, 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) of the head end adjusting device, the second adjusting flange (122) of the head end adjusting device, and the first adjusting flange (221) of the secondary rear end adjusting device are used to coarsely adjust the distance between the single pieces of the machine base, and the first stopping bolt (131) of the head end adjusting device, the second stopping bolt (132) of the head end adjusting device, the first stopping bolt (231) of the secondary rear end adjusting device, and the second stopping bolt (232) of the secondary rear end adjusting device are used to finally fix the position of the single piece of the machine base.

Images