Height adjusting tool and method for disassembling and assembling starting air header pipe of marine low-speed diesel engine

Abstract

The invention discloses a height adjusting tool and method for dismounting and mounting a starting air header pipe of a marine low-speed diesel engine. The height adjusting tool comprises a left fixing plate, a right fixing plate, an adjusting nut, an adjusting bolt, a rear support, a front support, a left supporting beam, a right supporting beam and a rolling support. The left supporting beam and the right supporting beam are connected to form supporting beams, the two ends of the two supporting beams are placed on the bases of the two brackets respectively, the adjusting bolts are vertically connected to the two ends of the supporting beams, and the adjusting nuts are connected to the adjusting bolts in a screwed mode and fixedly welded to the two ends of the left fixing plate and the two ends of the right fixing plate. The two ends of the front support and the rear support are welded and fixed to the front ends and the rear ends of the left fixing plate and the right fixing plate respectively, and the rolling support is arranged on the front support and the rear support and used for bearing a starting air header pipe. The rotating adjusting bolt jacks up the rolling support through the adjusting nut, so that the starting air header pipe is lifted to be separated from the bracket, and then the air header pipe is moved out of a narrow space to reach the position where a crane can operate. The disassembly and assembly difficulty of the starting air main pipe is overcome, and the effects of improving efficiency and guaranteeing safety are achieved.

Description

Technical Field

[0001] The invention relates to an assembly process of a large-scale marine low-speed diesel engine, in particular to a height adjustment tool and method for disassembling and assembling a starting air main pipe of a marine low-speed diesel engine, belonging to the technical field of diesel engine manufacturing. Background Art

[0002] During the operation of a low-speed marine diesel engine, the starting air main pipe may need to be disassembled for repair. Due to space limitations, it is not possible to work directly within the operable range of the crane during the repair process, which makes it inconvenient to disassemble and adjust the starting air main pipe; in addition, there is the factor that the starting air main pipe is too heavy. The weight of the starting air main pipe varies with the cylinder diameter of the main engine. For example, after the 6X72DF main engine starting air main pipe is disassembled, the weight of a single section is about 140kg. After the large-diameter 9X92DF main engine starting air main pipe is disassembled, the weight of a single section is about 330kg. Therefore, during the disassembly and assembly of the starting air main pipe, the flange heights at both ends of the starting air main pipe need to be adjusted to the top of the main engine bracket, and then the starting air main pipe is moved out of the narrow space using the rolling bracket and adjusted to an operable position for the crane.

[0003] At present, there is no special disassembly and assembly tool and operation method for the starting air main pipe for adjusting the height and supporting the starting air main pipe. Therefore, a safe, reliable and convenient height adjustment tool and method for disassembly and assembly of the starting air main pipe are needed to meet the disassembly and assembly operation and safety requirements of the starting air main pipe. Summary of the invention

[0004] The purpose of the present invention is to provide a reliable and safe height adjustment tool and method for disassembling and assembling a starting air main pipe of a marine low-speed diesel engine. During the disassembly and assembly process of the starting air main pipe, the height of the starting air main pipe can be adjusted so that the starting air main pipe can be moved out of a narrow space and reach a position where a crane can operate, so that operators can operate smoothly, thereby achieving the effect of improving operating efficiency and ensuring operating safety.

[0005] The technical solution adopted by the present invention to solve the technical problem is as follows:

[0006] A height adjustment tool for disassembling and assembling a starting air main pipe of a marine low-speed diesel engine, wherein the starting air main pipe is arranged in a narrow space of a main engine of a marine low-speed diesel engine and is mounted on a plurality of brackets through a U-shaped pipe clamp, wherein the height adjustment tool comprises a left fixing plate, a right fixing plate, an adjusting nut, an adjusting bolt, a rear bracket, a front bracket, a left supporting beam, a right supporting beam and a rolling bracket;

[0007] The left support beam and the right support beam are connected at the ends along the longitudinal direction to form a group of support beams. The two groups of support beams are arranged in parallel between the two brackets, and the two ends are placed on the bases of the two brackets respectively. The adjusting bolts are respectively connected upright on the two ends of the support beams, and the adjusting nuts are screwed on the adjusting bolts. The side surfaces of the two ends of the left fixing plate and the right fixing plate are respectively welded and fixed to the adjusting nuts at the two ends of the two support beams. The two ends of the front bracket are respectively welded and fixed to the front ends of the left fixing plate and the right fixing plate with the notches facing upwards. The two ends of the rear bracket are respectively welded and fixed to the rear ends of the left fixing plate and the right fixing plate with the notches facing upwards. The rolling bracket is simultaneously arranged on the front bracket and the rear bracket for carrying the starting air main pipe.

[0008] The rotating adjusting bolt lifts the rolling bracket through the adjusting nut, the left fixing plate, the right fixing plate, the front bracket and the rear bracket, thereby raising the starting air main pipe so that the starting air main pipe is separated from the bracket so as to be moved out of the narrow space of the main engine of the marine low-speed diesel engine to a position where the crane can operate.

[0009] Furthermore, the height adjustment tool also includes a reinforcing rib, which is transversely fixed and welded between the front bracket and the rear bracket and is located below the front bracket and the rear bracket.

[0010] Furthermore, the left support beam and the right support beam are made of H-shaped steel, and the left fixed plate, the right fixed plate, the front bracket, the rear bracket and the reinforcing ribs are made of channel steel.

[0011] Furthermore, the right fixing plate and the left fixing plate are arranged horizontally and parallel to each other, and the front bracket and the rear bracket are arranged horizontally and perpendicular to the left fixing plate and the right fixing plate.

[0012] Furthermore, the upper portion of the rolling bracket is provided with a V-shaped groove or a U-shaped groove matching the outer circumference of the starting air main pipe.

[0013] Another technical solution of the present invention is as follows:

[0014] A height adjustment method for disassembling and assembling a starting air main pipe of a marine low-speed diesel engine implemented by using the above-mentioned height adjustment tool comprises the following specific steps:

[0015] 1) Selecting a suitable height adjustment tool according to the spacing and height of the brackets and the height and segment length of the starting air main pipe;

[0016] 2) First, two groups of left support beams and right support beams are placed on the base of the bracket, and then the two groups of support beams are fixedly connected using bolts and nuts;

[0017] 3) Screw the adjusting bolts into the adjusting nuts on the left fixing plate and the right fixing plate, and place the left fixing plate, the right fixing plate, the front bracket and the rear bracket as a whole on the two sets of support beams;

[0018] 4) Place the rolling bracket on the front bracket and the rear bracket, and use a wrench to adjust the adjusting bolt so that the rolling bracket contacts the starting air main pipe;

[0019] 5) removing the U-shaped pipe clamp connecting the starting air main pipe and the bracket;

[0020] 6) Then, the adjusting bolt is further adjusted to lift the starting air main pipe through the rolling bracket, so that the segmented flange of the starting air main pipe is higher than the bracket;

[0021] 7) Slowly move the starting air main pipe out of the narrow space and bring it to a position where the crane can operate;

[0022] 8) Finally, the starting air main pipe is lifted off the main engine.

[0023] The beneficial technical effects of the present invention are as follows:

[0024] ① The technical problem of inconvenient disassembly and assembly of the starting air main pipe has been solved, so that the operating personnel can easily adjust the height of the starting air main pipe, move it out of the narrow space of the main engine of the marine low-speed diesel engine, reach a position where the crane can operate, and create conditions for repair work.

[0025] ② The difficulty of disassembly and assembly of the starting air main pipe is reduced, and the efficiency of the disassembly and assembly operation is improved.

[0026] In conclusion, the present invention overcomes the difficulties in the process of disassembling and assembling the starting air main pipe, and achieves the effects of improving operation efficiency and ensuring operation safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of the starting air main.

[0028] Figure 2 It is a structural schematic diagram of the present invention.

[0029] Figure 3 yes Figure 2 Left view of .

[0030] Figure 4 It is a usage state diagram of the present invention.

[0031] Figure 5 yes Figure 4 Left view of .

[0032] In the figure,

[0033] 01—Starting air main pipe, 02—Bracket, 03—U-shaped pipe clamp, 1—Left fixing plate, 2—Reinforcing rib, 3—Right fixing plate, 4—Adjusting nut, 5—Adjusting bolt, 6—Rear bracket, 7—Front bracket, 8—Left support beam, 9—Bolt, 10—Nut, 11—Right support beam, 12—Rolling bracket. DETAILED DESCRIPTION

[0034] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments, but the scope of protection of the present invention shall not be limited thereby.

[0035] The present invention is used for the disassembly and assembly of the starting air main pipe of a low-speed marine diesel engine. Figure 1 The starting air main pipe 01 is arranged in a narrow space of the main engine of a marine low-speed diesel engine and is mounted on a plurality of brackets 02 through a U-shaped pipe clamp 03 .

[0036] Please refer to Figure 2 , Figure 3 and Figure 5 The height adjustment tooling shown in the figure includes a left fixed plate 1, a reinforcing rib 2, a right fixed plate 3, an adjusting nut 4, an adjusting bolt 5, a rear bracket 6, a front bracket 7, a left support beam 8, a right support beam 11 and a rolling bracket 12.

[0037] The left support beam 8 and the right support beam 11 are made of H-shaped steel and are connected longitudinally at the ends by bolts 9 and nuts 10 to form a group of support beams. The two groups of support beams are arranged in parallel front and back between the two brackets 02, and the two ends are respectively placed on the bases of the two brackets 02.

[0038] The four adjusting bolts 5 are respectively connected upright on both ends of the two support beams, with their heads facing downward and their tails facing upward; the adjusting nuts 4 are screwed onto the adjusting bolts 5 .

[0039] The left fixed plate 1 and the right fixed plate 3 are made of channel steel, and the side surfaces at both ends of the left fixed plate 1 are respectively welded and fixed to the adjusting nuts 4 at the left ends of the two support beams, and the side surfaces at both ends of the right fixed plate 3 are respectively welded and fixed to the adjusting nuts 4 at the right ends of the two support beams. The right fixed plate 3 and the left fixed plate 1 are horizontally arranged and parallel to each other.

[0040] The front bracket 7 and the rear bracket 6 are made of channel steel. The two ends of the front bracket 7 are respectively welded and fixed on the front ends of the left fixing plate 1 and the right fixing plate 3 with the notches facing upwards, and the two ends of the rear bracket 6 are respectively welded and fixed on the rear ends of the left fixing plate 1 and the right fixing plate 3 with the notches facing upwards; the front bracket 7 and the rear bracket 6 are horizontally arranged and perpendicular to the left fixing plate 1 and the right fixing plate 3.

[0041] The reinforcing rib 2 is transversely fixed and welded between the front bracket 7 and the rear bracket 6 and is located below the front bracket 7 and the rear bracket 6. The reinforcing rib 2 is made of channel steel.

[0042] The rolling bracket 12 is arranged on the front bracket 7 and the rear bracket 6 at the same time, and is used to carry the starting air main pipe 01. The upper part of the rolling bracket 12 is provided with a V-shaped groove or a U-shaped groove matching the outer circle of the starting air main pipe 01.

[0043] The rotating adjusting bolt 5 lifts the rolling bracket 12 through the adjusting nut 4, the left fixing plate 1 and the right fixing plate 3, the front bracket 7 and the rear bracket 6, thereby raising the starting air main pipe 01 so that the starting air main pipe 01 is separated from the bracket 02 so as to be moved out of the narrow space of the main engine of the marine low-speed diesel engine and reach a position where the crane can operate, creating conditions for the rework operation.

[0044] When determining the structural dimensions of the height adjustment tool, first confirm the size of the opening of the main frame bracket 02, and then design the size of the left support beam 8 and the right support beam 11 according to the size of the opening of the bracket 02 and the weight of the starting air main pipe 01. Because the main frame bracket 02 is mostly H-shaped steel, the size and space are limited, and it is impossible to install it if it is designed as a single-section support beam, so the entire support beam is designed as a two-section assembly type. According to the size of the rolling bracket 12, design the front bracket 7 and the rear bracket 6. According to the weight of the starting air main pipe 01, design the size of the left fixed plate 1, the reinforcing rib 2, the right fixed plate 3 and the adjustment nut 4. According to the height from the flange of the starting air main pipe 01 to the bracket 02 and the size of the adjustment nut 4, design the size and length of the adjustment bolt 5.

[0045] The specific process of the height adjustment method for disassembling and assembling the starting air main pipe of a marine low-speed diesel engine according to the present invention is as follows. Figure 4 and Figure 5 :

[0046] 1) Before disassembling and assembling the starting air main pipe 01, first confirm the opening of the bracket 02 of the main engine and the height between the starting air main pipe 01 and the bracket 02, and select a suitable starting air main pipe height adjustment tool according to the segment length of the air main pipe 01;

[0047] 2) First, place two groups of left support beams 8 and right support beams 11 on the base of the bracket 02 of the host, and then use bolts 9 and nuts 10 to fix and connect the two groups of support beams respectively;

[0048] 3) Screw the adjusting bolt 5 into the adjusting nut 4 on the left fixing plate 1 and the right fixing plate 3, and place the left fixing plate 1 and the right fixing plate 3 as well as the front bracket 7 and the rear bracket 6 as a whole on the two sets of support beams;

[0049] 4) Then place the rolling bracket 12 on the front bracket 7 and the rear bracket 6, and adjust the adjusting bolt 5 using a wrench according to the height of the starting air main pipe 01, so that the rolling bracket 12 is in contact with the starting air main pipe 01;

[0050] 5) Remove the bolts, nuts and U-shaped pipe clamp 03 on the starting air main pipe 01 and the bracket 02;

[0051] 6) Then further adjust the adjusting bolt 5 so that the segmented flange of the starting air main pipe 01 is higher than the bracket 02;

[0052] 7) Slowly move the starting air main pipe 01 out of the narrow space in the longitudinal direction and bring it to a position where the crane can operate;

[0053] 8) Finally, the starting air main pipe 01 is lifted off the main engine.

[0054] The starting air main pipe disassembly and assembly height adjustment tool meets the requirements of convenient use, improves the efficiency of operators, and improves safety.

[0055] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. All equivalent changes and modifications made within the scope of the present invention should be within the technical scope of the present invention.

Claims

1. A height adjustment tool for disassembling and assembling a starting air main pipe of a marine low-speed diesel engine, wherein the starting air main pipe is arranged in a narrow space of a main engine of a marine low-speed diesel engine and is mounted on a plurality of brackets through a U-shaped pipe clamp, characterized in that: The height adjustment tooling comprises a left fixing plate, a right fixing plate, an adjusting nut, an adjusting bolt, a rear bracket, a front bracket, a left supporting beam, a right supporting beam and a rolling bracket; The left support beam and the right support beam are connected at the ends along the longitudinal direction to form a group of support beams. The two groups of support beams are arranged in parallel between the two brackets, and the two ends are placed on the bases of the two brackets respectively. The adjusting bolts are respectively connected upright on the two ends of the support beams, and the adjusting nuts are screwed on the adjusting bolts. The side surfaces of the two ends of the left fixing plate and the right fixing plate are respectively welded and fixed to the adjusting nuts at the two ends of the two support beams. The two ends of the front bracket are respectively welded and fixed to the front ends of the left fixing plate and the right fixing plate with the notches facing upwards. The two ends of the rear bracket are respectively welded and fixed to the rear ends of the left fixing plate and the right fixing plate with the notches facing upwards. The rolling bracket is simultaneously arranged on the front bracket and the rear bracket for carrying the starting air main pipe. The rotating adjusting bolt lifts the rolling bracket through the adjusting nut, the left fixing plate, the right fixing plate, the front bracket and the rear bracket, thereby raising the starting air main pipe so that the starting air main pipe is separated from the bracket so as to be moved out of the narrow space of the main engine of the marine low-speed diesel engine to a position where the crane can operate.

2. The height adjustment tool for disassembling and assembling the starting air main pipe of a marine low-speed diesel engine according to claim 1 is characterized in that: The height adjustment tool also includes a reinforcing rib, which is transversely fixed and welded between the front bracket and the rear bracket and is located below the front bracket and the rear bracket.

3. The height adjustment tool for disassembling and assembling the starting air main pipe of a low-speed marine diesel engine according to claim 2, characterized in that: The left support beam and the right support beam are made of H-shaped steel, and the left fixing plate, the right fixing plate, the front bracket, the rear bracket and the reinforcing ribs are made of channel steel.

4. The height adjustment tool for disassembling and assembling the starting air main pipe of a marine low-speed diesel engine according to claim 1, characterized in that: The right fixing plate and the left fixing plate are arranged horizontally and parallel to each other, and the front bracket and the rear bracket are arranged horizontally and perpendicular to the left fixing plate and the right fixing plate.

5. The height adjustment tool for disassembling and assembling the starting air main pipe of a low-speed marine diesel engine according to claim 1, characterized in that: The upper part of the rolling bracket is provided with a V-shaped groove or a U-shaped groove matching the outer circle of the starting air main pipe.

6. A height adjustment method for disassembling and assembling a starting air main pipe of a marine low-speed diesel engine using the height adjustment tool of claim 1, characterized in that: The height adjustment method comprises the following specific steps: 1) Selecting a suitable height adjustment tool according to the spacing and height of the brackets and the height and segment length of the starting air main pipe; 2) First, two groups of left support beams and right support beams are placed on the base of the bracket, and then the two groups of support beams are fixedly connected using bolts and nuts; 3) Screw the adjusting bolts into the adjusting nuts on the left fixing plate and the right fixing plate, and place the left fixing plate, the right fixing plate, the front bracket and the rear bracket as a whole on the two sets of support beams; 4) Place the rolling bracket on the front bracket and the rear bracket, and use a wrench to adjust the adjusting bolt so that the rolling bracket contacts the starting air main pipe; 5) removing the U-shaped pipe clamp connecting the starting air main pipe and the bracket; 6) Then, the adjusting bolt is further adjusted to lift the starting air main pipe through the rolling bracket, so that the segmented flange of the starting air main pipe is higher than the bracket; 7) Slowly move the starting air main pipe out of the narrow space and bring it to a position where the crane can operate; 8) Finally, the starting air main pipe is lifted off the main engine.

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