A hoisting device and method for an LGIP host

Abstract

A lifting device and method for an LGIP host, which adopts a lifting device designed and manufactured according to the statistical analysis results of the center of gravity of the whole machine assembly and the center of gravity of the cylinder block assembly of the LGIP host, flexibly combines three types of lifting tools and reasonably determines the lifting points to meet the lifting requirements of the whole machine assembly and the cylinder block assembly of different LGIP hosts in each stage of lifting and transportation; the lifting device is installed on the upper plane of the cylinder head and includes a left lifting tool, a right lifting tool and a number of inter-cylinder lifting tools. Among them, the left lifting tool and the right lifting tool are respectively installed on the upper planes of the leftmost and rightmost cylinder heads, and the inter-cylinder lifting tools are installed on the upper planes between two cylinder heads. Each lifting tool includes a bottom plate, a main lifting plate and a number of connecting nuts. The main lifting plate is provided with a central lifting hole or a first lifting hole, a second lifting hole and a third lifting hole for lifting, and the side edge of the bottom plate is provided with a contour line to avoid interference. The invention ensures the integrity of the whole machine assembly during transportation, improves the stability and safety of lifting, and has the advantages of safety and reliability, wide application range and strong practicability.

Description

Technical Field

[0001] The invention relates to the hoisting of a LGIP (Liquid gas injection LPG) dual-fuel marine main engine, in particular to a hoisting device and method for a LGIP main engine, belonging to the technical field of marine diesel engine manufacturing. Background Art

[0002] With the various environmental problems caused by the pollution emissions of traditional fossil fuels, countries around the world have increasingly tightened restrictions on the use of fossil fuels. As a major consumer of fossil energy, ships also emit alarming amounts of pollutants. With the formal implementation of the Tier III regulations of the IMO organization on January 1, 2016, marine diesel engines have become more stringent in terms of the emission of NOx and SOx pollutants. Therefore, the development of more environmentally friendly marine engines has become an urgent task, and dual-fuel engines have been applied in this context. Dual-fuel engines are engines that use two fuels at the same time, and can operate in both dual-fuel mode and pure diesel mode. In this context, the market has launched LGIP (Liquid gas injection LPG) dual-fuel marine engines.

[0003] Because of the addition of a gas chain pipe to the LGIP main engine, the lifting equipment needs to be redesigned. The existing lifting equipment is limited in lifting capacity and cannot lift the entire LGIP main engine. The lifting operation can only be completed by splitting the entire engine into two sections and removing part of the gas pipeline in the cylinder head of the LGIP main engine. Repeated disassembly of the gas chain pipe may damage the chain pipe, destroying the air tightness of the gas chain pipe, and causing the air tightness of the main engine to deteriorate. In addition, the original lifting equipment needs to add counterweights according to the eccentricity of the main engine to meet the lifting requirements, which is time-consuming and labor-intensive, not only increasing the use time of the crane, but also wasting a lot of time for the construction workers. A lifting device that is more suitable for the LGIP main engine assembly and cylinder assembly is now needed. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a safer, more convenient and more reliable lifting device and method for the LGIP main engine. According to the different eccentricities of the cylinder assembly and the main engine assembly, the number of lifting devices and the position of the lifting holes can be flexibly selected to meet the requirements of the LGIP main engine cylinder assembly and the whole machine assembly at various stages of lifting and transportation, so as to ensure the stability and safety of the lifting of the marine low-speed diesel engine.

[0005] The technical solution of the present invention is as follows:

[0006] A lifting device for an LGIP host, applicable to the lifting and transfer of the whole machine assembly and cylinder block assembly of the LGIP host. There are cylinder head studs on the cylinder head of the LGIP host. It is characterized in that: the lifting device is installed on the upper plane of the cylinder head and includes a left sling, a right sling and several inter-cylinder slings;

[0007] The left sling is installed on the upper plane of the leftmost cylinder head and includes a bottom plate, two main lifting plates, a main support plate and several connecting nuts. The bottom plate is provided with fixing holes for passing through the cylinder head studs. The shape of the contour line of the right side edge of the bottom plate is determined according to the components on the upper plane of the cylinder head to avoid interference. The two main lifting plates are respectively vertically welded to the front and rear side parts of the bottom plate. A central lifting hole is provided on the main lifting plate. The main support plate is vertically welded to the bottom plate between the two main lifting plates and is respectively welded to the two main lifting plates at both ends. The connecting nuts are connected to the cylinder head studs and fixedly connect the bottom plate to the upper plane of the cylinder head;

[0008] The right sling is installed on the upper plane of the rightmost cylinder head and includes a bottom plate, two main lifting plates, a main support plate and several connecting nuts. The bottom plate is provided with fixing holes for passing through the cylinder head studs. The shape of the contour line of the left side edge of the bottom plate is determined according to the components on the upper plane of the cylinder head to avoid interference. The two main lifting plates are respectively vertically welded to the front and rear side parts of the bottom plate. A central lifting hole is provided on the main lifting plate. The main support plate is vertically welded to the bottom plate between the two main lifting plates and is respectively welded to the two main lifting plates at both ends. The connecting nuts are connected to the cylinder head studs and fixedly connect the bottom plate to the upper plane of the cylinder head;

[0009] The inter-cylinder sling is installed on the upper plane between two cylinder heads and includes a bottom plate, a main lifting plate and several connecting nuts. The bottom plate is provided with fixing holes for passing through the cylinder head studs. The shapes of the contour lines of the left side edge and the right side edge of the bottom plate are determined according to the components on the upper plane of the cylinder head to avoid interference. The main lifting plate is vertically welded to the middle of the bottom plate. A first lifting hole, a second lifting hole and a third lifting hole are provided on the main lifting plate. The first lifting hole and the third lifting hole are respectively arranged at the front and rear side parts of the main lifting plate. The second lifting hole is located between the first lifting hole and the third lifting hole and is close to the first lifting hole. The connecting nuts are connected to the cylinder head studs and fixedly connect the bottom plate to the upper plane of the cylinder head.

[0010] Furthermore, the left sling, the right sling and the inter-cylinder sling further include multiple auxiliary support plates for reinforcement. The auxiliary support plates are vertically welded to both side surfaces of the main lifting plate and are welded to the bottom plate at the lower part.

[0011] Further, the positions of the fixing holes on the bottom plate correspond to the positions of the cylinder head studs.

[0012] Further, the structure of the lifting device is designed and manufactured according to the statistical analysis results of the overall assembly center of gravity of the LGIP main engine and the cylinder block assembly center of gravity.

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

[0014] A lifting method for an LGIP main engine implemented by using the above-mentioned lifting device, characterized in that: a lifting device designed and manufactured according to the statistical analysis results of the overall assembly center of gravity of the LGIP main engine and the cylinder block assembly center of gravity is used to flexibly combine three types of lifting tools and reasonably determine the lifting points to meet the lifting requirements of different overall assemblies and cylinder block assemblies of the LGIP main engine in each stage of lifting and transportation.

[0015] Further, the lifting method includes:

[0016] Lifting and transportation of the overall assembly -

[0017] Fix the inter-cylinder lifting tool on the upper plane between each cylinder head through the cylinder head studs, fix the left lifting tool on the upper plane of the leftmost cylinder head through the cylinder head studs, fix the right lifting tool on the upper plane of the rightmost cylinder head through the cylinder head studs, select the central lifting holes on the main lifting plates of the left and right lifting tools and the first and third lifting holes on the main lifting plate of the inter-cylinder lifting tool as the lifting points, and start the lifting equipment to complete the lifting and transportation of the overall assembly of the LGIP main engine;

[0018] Lifting and transportation of the cylinder block assembly -

[0019] Fix the inter-cylinder lifting tool on the upper plane between each cylinder head through the cylinder head studs, select the second and third lifting holes on the main lifting plate of the inter-cylinder lifting tool as the lifting points, and start the lifting equipment to complete the lifting and transportation of the cylinder block assembly of the LGIP main engine.

[0020] Further, the lifting method includes the following steps:

[0021] 1) After the LGIP main engine enters the transportation stage, lift the inter-cylinder lifting tool to the upper plane of the cylinder head;

[0022] 2) Connect and fasten through the connecting nut and the cylinder head stud to fix the inter-cylinder lifting tool on the upper plane between each cylinder head;

[0023] 3) If hoisting the cylinder block assembly, select the second and third lifting holes on the main lifting plate of the inter-cylinder hoist as the lifting points, start the hoisting equipment to complete the hoisting and transfer of the cylinder block assembly of the LGIP main engine; if hoisting the whole machine assembly, perform step 4);

[0024] 4) Hoist the left and right hoists to the upper plane of the cylinder head, connect and fasten them to the cylinder head studs through the connecting nuts, then fixedly install the left hoist on the upper plane of the leftmost cylinder head, and fixedly install the right hoist on the upper plane of the rightmost cylinder head;

[0025] 5) Select the central lifting holes on the main lifting plates of the left and right hoists and the first and third lifting holes on the main lifting plate of the inter-cylinder hoist as the lifting points, start the hoisting equipment to complete the hoisting and transfer of the whole machine assembly of the LGIP main engine.

[0026] The present invention adopts three kinds of hoists designed and manufactured according to the statistical analysis results of the center of gravity of the LGIP main engine and the cylinder block assembly, flexibly combines them and reasonably determines the lifting points, meeting the lifting requirements of the cylinder block assembly and the whole machine assembly of different LGIP main engines in each stage of hoisting and transfer. Compared with the prior art, the present invention has achieved the following beneficial effects:

[0027] 1. The present invention solves the problem that the current LGIP main engine must be hoisted and shipped in sections, realizes the whole machine hoisting and transfer of the LGIP main engine, ensures the integrity during the transfer of the whole machine assembly, not only effectively shortens the occupancy time of the test bench, but also saves the disassembly operation time required for sectional shipping, thereby improving the labor productivity and reducing the production cost.

[0028] 2. Through the flexible combination of three kinds of hoisting equipment, the present invention can not only complete the hoisting and transfer of the whole machine assembly of the LGIP main engine, but also complete the hoisting and transfer of the cylinder block assembly, improving the flexibility of the hoisting and transfer operation of the LGIP main engine, and having the advantages of wide application range and strong practicability.

[0029] 3. According to the characteristics of the center of gravity positions of different LGIP main engines, reasonably select and use the lifting holes at different positions to make the hoisting operation reach a most reasonable, stable and safe state, thereby ensuring the stability of the hoisting of different whole machine assemblies and cylinder block assemblies and ensuring the safety of hoisting.

[0030] 4. The structure of the lifting equipment ingeniously avoids interference with the gas pipe system on the cylinder head of the LGIP main engine. During the lifting operation, it is not necessary to disassemble part of the gas pipe system, nor to disassemble the nuts of the cylinder head studs. This not only avoids the damage to the airtightness of the gas pipe system, ensures the integrity and good performance of the gas pipe system during shipment, fundamentally avoids the subsequent time-consuming repetition of the airtightness test of the main engine gas pipeline, but also saves a lot of time for repeated disassembly and assembly.

[0031] In summary, the present invention has the advantages of being simple and feasible, safe and reliable, wide application range and strong practicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is the front view of the inter-cylinder sling.

[0033] Figure 2 is Figure 1 the left view of

[0034] Figure 3 is Figure 1 the top view of

[0035] Figure 4 is the front view of the left sling.

[0036] Figure 5 is Figure 4 the left view of

[0037] Figure 6 is Figure 4 the top view of

[0038] Figure 7 is the front view of the right sling.

[0039] Figure 8 is Figure 7 the left view of

[0040] Figure 9 is Figure 7 the top view of

[0041] Figure 10 is the installation schematic diagram of the lifting equipment when lifting the whole LGIP main engine assembly.

[0042] Figure 11 is the method flow chart of the present invention.

[0043] In the figure: 1 - bottom plate, 2 - main lifting plate, 3 - auxiliary support plate, 4 - main support plate, 5 - connecting nut, A - first lifting hole, B - second lifting hole, C - third lifting hole, D - center lifting hole, G - cylinder head, L - contour line, P - left sling, Q - inter-cylinder sling, R - right sling. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0044] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. In the following embodiments, the preferred embodiments of the present invention are listed, but the protection scope of the present invention is not limited thereto.

[0045] The present invention is used for the lifting and transportation of the whole machine assembly or cylinder block assembly of an LGIP host. The LGIP host includes a plurality of cylinders, and cylinder head studs are provided on the cylinder heads of the cylinders.

[0046] Based on the center of gravity position characteristics of the LGIP host assembly and cylinder block assembly analyzed statistically, the present invention designs different lifting tools and determines the positions of the lifting holes on the main lifting plate. By reasonably combining the use of various lifting tools and selecting the main lifting points, not only the interference with the gas pipeline system on the cylinder head is avoided, but also the disassembly of the nuts on the cylinder head studs is saved, realizing the lifting and transportation of the whole machine assembly or cylinder block assembly of the LGIP host, achieving the most reasonable, stable and safe lifting state, effectively ensuring the integrity and safety of the transportation of the whole machine assembly, and at the same time ensuring the integrity and good airtightness of the gas pipeline system during shipment.

[0047] The lifting device described in the present invention is installed on the upper plane of the cylinder head and includes a left lifting tool, a right lifting tool and several inter-cylinder lifting tools.

[0048] Please refer to Figure 1 、 Figure 2 and Figure 3 , the inter-cylinder lifting tool is installed on the upper plane between two cylinder heads and includes a bottom plate 1, a main lifting plate 2, multiple auxiliary support plates 3 and several connecting nuts 5.

[0049] Fixing holes for passing through the cylinder head studs are provided on the bottom plate 1, and the positions of the fixing holes correspond to the positions of the cylinder head studs; the shapes of the contour lines L on the left and right sides of the bottom plate 1 are determined according to the components on the upper plane of the cylinder head, as shown in Figure 1 , so as to avoid interference. The main lifting plate 2 is vertically welded to the middle of the bottom plate 1, and a first lifting hole A, a second lifting hole B and a third lifting hole C for lifting are opened on the main lifting plate 2, as shown in Figure 2 , the first lifting hole A and the third lifting hole C are respectively arranged on the front and rear side parts of the main lifting plate 2, and the second lifting hole B is located between the first lifting hole A and the third lifting hole C and is close to the first lifting hole A. The connecting nut 5 is connected to the cylinder head stud and fixedly connects the bottom plate 1 to the upper plane of the cylinder head.

[0050] Please refer to Figure 4 、 Figure 5 and Figure 6 , the left lifting tool is installed on the upper plane of the leftmost cylinder head and includes a bottom plate 1, two main lifting plates 2, a main support plate 4, multiple auxiliary support plates 3 and several connecting nuts 5.

[0051] The bottom plate 1 is provided with fixing holes for passing through the cylinder head studs, and the positions of the fixing holes correspond to the positions of the cylinder head studs; the shape of the contour line L on the right side of the bottom plate 1 is determined according to the components on the upper plane of the cylinder head, as shown in Figure 4 , so as to avoid interference. The two main lifting plates 2 are respectively welded uprightly on the front and rear sides of the bottom plate 1, and a central lifting hole D for lifting is provided on the main lifting plate 2, as shown in Figure 6 . The main support plate 4 is welded uprightly on the bottom plate 1 between the two main lifting plates 2 and is welded to the two main lifting plates 2 at both ends respectively. The auxiliary support plate 3 is used for strengthening the structure, and the auxiliary support plate 3 is welded uprightly on the two side surfaces of the main lifting plate 2 and the lower part is welded to the bottom plate 1. The connecting nut 5 is connected to the cylinder head stud and fixedly connects the bottom plate 1 to the upper plane of the cylinder head.

[0052] Please refer to Figure 7 , Figure 8 and Figure 9 , the right sling is installed on the upper plane of the rightmost cylinder head, and includes a bottom plate 1, two main lifting plates 2, a main support plate 4, multiple auxiliary support plates 3 and several connecting nuts 5.

[0053] The bottom plate 1 is provided with fixing holes for passing through the cylinder head studs, and the positions of the fixing holes correspond to the positions of the cylinder head studs; the shape of the contour line L on the left side of the bottom plate 1 is determined according to the components on the upper plane of the cylinder head, as shown in Figure 7 , so as to avoid interference. The two main lifting plates 2 are respectively welded uprightly on the front and rear sides of the bottom plate 1, and a central lifting hole D for lifting is provided on the main lifting plate 2, as shown in Figure 9 . The main support plate 4 is welded uprightly on the bottom plate 1 between the two main lifting plates 2 and is welded to the two main lifting plates 2 at both ends respectively. The auxiliary support plate 3 is used for strengthening the structure, and the auxiliary support plate 3 is welded uprightly on the two side surfaces of the main lifting plate 2 and the lower part is welded to the bottom plate 1. The connecting nut 5 is connected to the cylinder head stud and fixedly connects the bottom plate 1 to the upper plane of the cylinder head.

[0054] Please refer to Figure 10 , the lifting method for the LGIP main engine according to the present invention includes:

[0055] Lifting and transporting the whole machine assembly -

[0056] Fix the cylinder - between hoist Q on the upper plane between each cylinder head G through the cylinder - head stud, fix the left hoist P on the upper plane of the left - most cylinder head G through the cylinder - head stud, fix the right hoist R on the upper plane of the right - most cylinder head G through the cylinder - head stud. Select the central hoisting hole D on the main hoisting plate 2 of the left hoist P and the right hoist R and the first hoisting hole A and the third hoisting hole C on the main hoisting plate 2 of the cylinder - between hoist Q as the hoisting points, and start the hoisting equipment to complete the hoisting and transfer of the whole - machine assembly of the LGIP main engine.

[0057] Hoisting and Transfer of the Cylinder Block Assembly——

[0058] Fix the cylinder - between hoist Q on the upper plane between each cylinder head G through the cylinder - head stud. Select the second hoisting hole B and the third hoisting hole C on the main hoisting plate of the cylinder - between hoist Q as the hoisting points, and start the hoisting equipment to complete the hoisting and transfer of the cylinder block assembly of the LGIP main engine.

[0059] Please refer to Figure 11 , the specific operation process of the hoisting method includes the following steps:

[0060] 1) When the LGIP main engine is in the stage of whole - machine assembly transfer after commissioning, use the hoisting hole to hoist the hoisting equipment to the upper plane of the cylinder head;

[0061] 2) Connect and tighten through the connecting nut 5 with the cylinder - head stud, fix the cylinder - between hoist Q on the upper plane between each cylinder head G, and ensure that there is no movement during the hoisting process;

[0062] 3) If hoisting the cylinder block assembly, select the second hoisting hole B and the third hoisting hole C on the main hoisting plate of the cylinder - between hoist Q as the hoisting points, and start the hoisting equipment to complete the hoisting and transfer of the cylinder block assembly of the LGIP main engine; if hoisting the whole - machine assembly, execute step 4);

[0063] 4) Connect and tighten through the connecting nut 5 with the cylinder - head stud, fix the left hoist P on the upper plane of the left - most cylinder head G, fix the right hoist R on the upper plane of the right - most cylinder head G, and ensure that there is no movement during the hoisting process;

[0064] 5) Select the central hoisting hole D on the main hoisting plate 2 of the left hoist P and the right hoist R and the first hoisting hole A and the third hoisting hole C on the main hoisting plate 2 of the cylinder - between hoist Q as the hoisting points, and start the hoisting equipment to complete the hoisting and transfer of the whole - machine assembly of the LGIP main engine.

Claims

1. A lifting device for an LGIP host, applicable to the lifting and transfer of the whole machine assembly and cylinder block assembly of the LGIP host. There are cylinder head studs on the cylinder head of the LGIP host; It is characterized in that: The lifting device is installed on the upper plane of the cylinder head and includes a left sling, a right sling and several inter-cylinder slings; The left sling is installed on the upper plane of the leftmost cylinder head and includes a bottom plate, two main lifting plates, a main support plate and several connecting nuts. The bottom plate is provided with fixing holes for passing through the cylinder head studs. The shape of the contour line on the right side of the bottom plate is determined according to the components on the upper plane of the cylinder head to avoid interference. The two main lifting plates are respectively vertically welded to the front and rear side parts of the bottom plate. The main lifting plates are provided with central lifting holes for lifting. The main support plate is vertically welded to the bottom plate between the two main lifting plates and is respectively welded to the two main lifting plates at both ends. The connecting nuts are connected to the cylinder head studs and fixedly connect the bottom plate to the upper plane of the cylinder head; The right sling is installed on the upper plane of the rightmost cylinder head and includes a bottom plate, two main lifting plates, a main support plate and several connecting nuts. The bottom plate is provided with fixing holes for passing through the cylinder head studs. The shape of the contour line on the left side of the bottom plate is determined according to the components on the upper plane of the cylinder head to avoid interference. The two main lifting plates are respectively vertically welded to the front and rear side parts of the bottom plate. The main lifting plates are provided with central lifting holes for lifting. The main support plate is vertically welded to the bottom plate between the two main lifting plates and is respectively welded to the two main lifting plates at both ends. The connecting nuts are connected to the cylinder head studs and fixedly connect the bottom plate to the upper plane of the cylinder head; The inter-cylinder sling is installed on the upper plane between two cylinder heads and includes a bottom plate, a main lifting plate and several connecting nuts. The bottom plate is provided with fixing holes for passing through the cylinder head studs. The shapes of the contour lines on the left side and the right side of the bottom plate are determined according to the components on the upper plane of the cylinder head to avoid interference. The main lifting plate is vertically welded to the middle of the bottom plate. The main lifting plate is provided with a first lifting hole, a second lifting hole and a third lifting hole for lifting. The first lifting hole and the third lifting hole are respectively arranged at the front and rear side parts of the main lifting plate. The second lifting hole is located between the first lifting hole and the third lifting hole and is close to the first lifting hole. The connecting nuts are connected to the cylinder head studs and fixedly connect the bottom plate to the upper plane of the cylinder head.

2. The lifting device for an LGIP host according to claim 1, It is characterized in that: The left sling, the right sling and the inter-cylinder sling further include multiple auxiliary support plates for reinforcement. The auxiliary support plates are vertically welded to both sides of the main lifting plate and the lower part is welded to the bottom plate.

3. The lifting device for an LGIP host according to claim 1, It is characterized in that: The positions of the fixing holes on the bottom plate correspond to the positions of the cylinder head studs.

4. The lifting device for an LGIP host according to claim 1, It is characterized in that: The structure of the lifting equipment described above is designed and manufactured based on the statistical analysis results of the overall assembly center of gravity and the cylinder block assembly center of gravity of the LGIP main engine.

5. A lifting method for an LGIP main engine implemented by using the lifting equipment described in claim 1, characterized in that: A lifting equipment designed and manufactured according to the statistical analysis results of the overall assembly center of gravity and the cylinder block assembly center of gravity of the LGIP main engine is adopted, and three types of lifting tools are flexibly combined and the lifting points are reasonably determined to meet the lifting requirements of different overall assemblies and cylinder block assemblies of the LGIP main engine in each stage of lifting and transportation.

6. The lifting method for an LGIP main engine according to claim 5, characterized in that: The lifting method described above includes: Lifting and transportation of the overall assembly - The inter-cylinder lifting tool is fixedly installed on the upper plane between each cylinder head through the cylinder head stud, the left lifting tool is fixedly installed on the upper plane of the leftmost cylinder head through the cylinder head stud, the right lifting tool is fixedly installed on the upper plane of the rightmost cylinder head through the cylinder head stud, and the central lifting holes on the main lifting plates of the left and right lifting tools and the first and third lifting holes on the main lifting plate of the inter-cylinder lifting tool are selected as the lifting points, and the lifting equipment is started to complete the lifting and transportation of the overall assembly of the LGIP main engine; Lifting and transportation of the cylinder block assembly - The inter-cylinder lifting tool is fixedly installed on the upper plane between each cylinder head through the cylinder head stud, and the second and third lifting holes on the main lifting plate of the inter-cylinder lifting tool are selected as the lifting points, and the lifting equipment is started to complete the lifting and transportation of the cylinder block assembly of the LGIP main engine.

7. The lifting method for an LGIP main engine according to claim 5 or 6, characterized in that: The lifting method described above includes the following steps: 1) After the LGIP main engine enters the transportation stage, the inter-cylinder lifting tool is lifted to the upper plane of the cylinder head; 2) It is connected with the cylinder head stud through the connecting nut and tightened to fixedly install the inter-cylinder lifting tool on the upper plane between each cylinder head; 3) If the cylinder block assembly is to be lifted, the second and third lifting holes on the main lifting plate of the inter-cylinder lifting tool are selected as the lifting points, and the lifting equipment is started to complete the lifting and transportation of the cylinder block assembly of the LGIP main engine; If the overall assembly is to be lifted, step 4) is executed; 4) The left and right lifting tools are lifted to the upper plane of the cylinder head, connected with the cylinder head stud through the connecting nut and tightened, and then the left lifting tool is fixedly installed on the upper plane of the leftmost cylinder head, and the right lifting tool is fixedly installed on the upper plane of the rightmost cylinder head; 5) The central lifting holes on the main lifting plates of the left and right lifting tools and the first and third lifting holes on the main lifting plate of the inter-cylinder lifting tool are selected as the lifting points, and the lifting equipment is started to complete the lifting and transportation of the overall assembly of the LGIP main engine.

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