A connection structure between a combustion engine chassis and a foundation and an installation method thereof

Abstract

The present invention provides a connection structure between a chassis of a fuel engine and a foundation and an installation method thereof, which relates to the field of fuel engine installation, including a support structure and a guide structure; the support structure is fixedly connected to the chassis of the fuel engine; the guide structure is slidably connected to the guide groove of the chassis of the fuel engine; the guide structure includes a guide support fixed in the foundation, a guide fixing plate is fixedly connected to the bottom of the guide support, a secondary grouting guide reference plate and a first guide key height positioning plate are fixedly connected to the top of the guide support in sequence, the upper surface of the secondary grouting guide reference plate is flush with the upper surface of the foundation, and a guide key is fixed to the upper surface of the first guide key height positioning plate. The present invention can reduce a large amount of alignment work between the chassis and the connection structure when the chassis of the fuel engine is connected to the foundation, can effectively shorten the installation time, improve the installation efficiency, and is conducive to air circulation and relieves thermal stress.

Description

Technical Field

[0001] The invention relates to the field of gas engine installation, in particular to a connection structure between a gas engine chassis and a foundation and an installation method thereof, which are used for connecting the gas engine to the foundation through the chassis. Background Art

[0002] Gas turbine generator sets have the advantages of environmental protection, fast start-up, small footprint, and short construction period. For gas turbine units with chassis, the gas turbine body and surrounding pipelines are generally assembled on an independent gas turbine chassis, that is, the gas turbine body and surrounding pipelines are installed and positioned in the factory and then lifted and shipped as a whole with the chassis. The gas turbine is connected to the foundation through the chassis. After the on-site equipment is centered, the chassis is fixed to the foundation and the temporary fixings are removed, which can save the adjustment of the body support and sliding pin structure on site and effectively shorten the installation period.

[0003] For single-story plants or outdoor layouts, the conventional connection method between the chassis and the foundation of the gas turbine is as follows: the anchor bolt assembly is pre-buried during the first grouting period, and then the bolt holes on the chassis are aligned with the anchor bolts, and the upper nuts of the anchor bolts are tightened after adjusting the height and level, and then the secondary grouting is performed to completely fix the chassis on the foundation, and there is no gap between the chassis and the foundation. Since the position of the anchor bolts is fixed after being pre-buried, the position of the chassis needs to be carefully adjusted when aligning the chassis with the anchor bolts. The more anchor bolts there are, the more time-consuming it is. Since there is no gap between the chassis and the foundation after the chassis is fixed to the foundation through the secondary grouting, a dead cavity is formed inside the chassis, which is not conducive to air circulation. This is easy to cause dangerous gas accumulation for gas turbines that burn natural gas, increasing the risk of explosion. In addition, there is no gap between the chassis and the foundation, which means that once the gas turbine needs to be moved, such as relocating the gas turbine unit, the foundation and even the anchor bolts need to be destroyed, which will greatly increase the workload.

[0004] The Chinese patent application number CN202110328325.2 discloses a gas turbine base fixing device and a fixing device installation method, including a load-bearing structure, an embedded part structure and a tightening structure; the load-bearing structure includes an embedded plate and an embedded plate support seat; the embedded plate support seat is connected to the embedded plate; the embedded plate is used to fix the gas turbine base; the tightening structure includes anchor bolts and nuts, and the method is that the embedded parts are welded, shipped to the site, and after positioning, the level of the channel steel is ensured to be within the tolerance range by a level gauge, and grouting is performed once. After the concrete is solidified, the T-shaped anchor bolts can be placed, screwed to the limit baffle and tightened. The invention uses an embedded part structure, which can improve the control of the position offset of the entire embedded part during the pouring of concrete, but the position of the chassis needs to be carefully adjusted when the chassis is aligned with the anchor bolts, and the installation is cumbersome, and the gas turbine base is completely fixed on the foundation by the anchor bolts. When the gas turbine is working and heating, the thermal stress on the base cannot be released, which easily causes the base to twist and deform.

[0005] The Chinese patent application number CN201910204727.4 discloses a method for installing and manufacturing a pre-buried steam turbine support base plate. Three M14 expansion bolts are arranged in a triangle and installed vertically on the steam turbine installation foundation, used as height adjustment and support rods. Round steel with a diameter of 6 is selected as a connector to connect the base plate and the height adjustment and support rods. The height is adjusted using a collar, expansion screws and adjustment nuts. The above components are assembled and placed on top of the mold, and the mold is filled with grouting material to form a solid support after cooling. In this invention, after the chassis is fixed to the foundation by grouting, there is no gap between the chassis and the foundation, so that a dead cavity is formed inside the chassis, which is not conducive to air circulation. When the gas turbine is working and heating up, the thermal stress on the base cannot be released, which can easily cause the base to twist and deform.

[0006] Therefore, there is a need for a connection structure between a gas turbine chassis and a foundation that is easy to install and disassemble, has strong heat dissipation performance, and can relieve thermal stress of the gas turbine chassis and prevent deformation. Summary of the invention

[0007] Based on the above problems, the purpose of the present invention is to provide a connection structure between the chassis and the foundation of the gas turbine, which is used to connect the gas turbine to the foundation through the chassis, save the adjustment work of the main body support on site, effectively shorten the installation period, and relieve the thermal stress of the gas turbine chassis to prevent deformation.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A connection structure between a combustion engine chassis and a foundation, comprising a support structure and a guide structure; the support structure is fixedly connected to the combustion engine chassis; the guide structure is slidably connected to a guide groove of the combustion engine chassis;

[0010] The guide structure includes a guide support member fixed in the foundation, a guide fixing plate fixedly connected to the bottom of the guide support member, a secondary grouting guide reference plate and a first guide key height positioning plate fixedly connected to the top of the guide support member in sequence, the upper surface of the secondary grouting guide reference plate is flush with the upper surface of the foundation, a guide key is fixed to the upper surface of the first guide key height positioning plate, and the guide key is matched and connected with a guide pad provided on the lower surface of the engine chassis.

[0011] Preferably, the supporting structure includes a support plate group fixed in the foundation, the bottom of the support plate group is fixedly connected to a bottom plate fixing plate, the top of the support plate group is fixedly connected to a secondary grouting support reference plate, a transition sleeve and a chassis connecting plate in sequence from bottom to top, the upper surface of the secondary grouting support reference plate is flush with the upper surface of the foundation, and the chassis connecting plate is fixedly connected to a supporting pad provided on the lower surface of the fuel turbine chassis.

[0012] Preferably, the transition sleeve is in the shape of a hollow circular tube, and a through hole is provided on the side wall of the transition sleeve, and the through hole can absorb the deformation of the supporting structure when it is subjected to force.

[0013] Preferably, the support plate group is a hollow structure, which is formed by welding several rectangular plates end to end. The support plate group is used to connect the secondary grouting support reference plate and the support bottom plate, and has strong mechanical rigidity.

[0014] Preferably, the second guide key height positioning plates are symmetrically fixed on both side walls of the first guide key height positioning plate; the first guide key height positioning plate is provided with a through hole. The first guide key height positioning plate and the second guide key height positioning plate are used to fix the distance between the guide key and the secondary grouting reference plate to appropriately reduce the thickness of the guide key and save costs. The through hole is used to absorb the deformation of the guide key when it is subjected to the chassis load.

[0015] Preferably, a plurality of protruding support reinforcement ribs are evenly arranged on the outer side wall of the support plate group, and a plurality of guide reinforcement ribs are evenly arranged on the outer side wall of the guide support member. The arrangement of the reinforcement ribs can increase the rigidity and load bearing capacity of the support plate group and the guide support member.

[0016] Preferably, the guide support member is an I-beam structure, which is a structure with the strongest pressure resistance in the current technical field.

[0017] Preferably, the cross section of the guide key is an inverted T-shape, the upper half of the guide key is a rectangular block structure, and the width of the lower half linearly expands to a fixed value.

[0018] A method for installing a support structure, using the support structure described above, the method for installing the support structure comprises the following steps:

[0019] S1. A reserved pit for placing the support structure is reserved, a plurality of embedded parts are positioned and fixed, and a grouting is performed once and a grouting foundation is formed around the reserved pit;

[0020] S2. After the primary grouting foundation is cured, the support structure is placed in the reserved pit and temporarily fixed, and the installation tool is placed at an appropriate position on the upper plane of the primary grouting foundation and the height of the installation tool is adjusted;

[0021] S3. The engine chassis is placed on the installation tool, and after horizontal correction and position alignment, the support structure and the chassis are adjusted and connected by connecting bolts, connecting nuts and adjusting gaskets;

[0022] S4. Carry out secondary grouting. After the secondary grouting foundation is solidified, adjust the tightening degree of the connecting nuts.

[0023] A method for installing the guide structure described in any one of the above, comprising the following steps:

[0024] S1. A reserved pit for placing the guide structure is reserved, a plurality of embedded parts are positioned and fixed, and a grouting is performed once and a grouting foundation is formed around the reserved pit;

[0025] S2. After the primary grouting foundation is cured, the guide structure is placed in the reserved pit and temporarily fixed, and the installation tool is placed in an appropriate position on the upper plane of the primary grouting foundation and the height of the installation tool is adjusted;

[0026] S3. The engine chassis is placed on the installation tool, and after horizontal correction and position alignment, the guide structure and the chassis are initially fixedly connected by connecting bolts;

[0027] S4. Perform secondary grouting, and after the secondary grouting foundation is solidified, remove the connecting bolts.

[0028] Preferably, in step S2, the guide key cooperates with a guide pad provided on the lower surface of the engine chassis, a guide groove is provided on the lower surface of the guide pad, and the guide key keeps the same direction as the guide groove.

[0029] Compared with the prior art, the present invention has the following advantages:

[0030] 1. In the technical solution of the present invention, the guide key above the guide structure cooperates with the chassis guide groove, the engine chassis and the guide structure can slide against each other, and when the chassis expands due to heat conduction from the engine cylinder, it can expand freely in the axial direction with the front of the chassis as the dead point. During the expansion process, the engine chassis and the guide structure can slide against each other, reducing the damage to the engine chassis caused by thermal stress.

[0031] 2. According to the technical solution of the present invention, unlike the anchor screws, the flexible connection component that plays a fixed connection role does not need to be embedded in advance, but is fixed on the outside of the foundation. This can reduce a lot of alignment work between the chassis and the flexible connection component when the engine chassis is connected to the foundation, effectively shorten the installation time, improve the installation efficiency, and can also achieve rapid separation between the chassis and the foundation when the unit needs to be relocated, thereby increasing the disassembly efficiency.

[0032] 3. In the technical solution of the present invention, the secondary grouting only needs to reach the upper part of the secondary grouting reference plate of the connecting structure, and a larger gap is formed between the lower part of the chassis and the foundation plane, which is conducive to air circulation in the lower part of the chassis, reduces the accumulation of dangerous gases, and improves the safety of on-site operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a schematic diagram of the installation distribution of the connection structure between the chassis and the foundation of the combustion engine in the present invention;

[0034] Figure 2 is a schematic diagram of the support structure of the present invention;

[0035] Figure 3 It is a schematic diagram of the guiding structure of the present invention;

[0036] Figure 4 It is a schematic diagram of the installation of a support structure between the chassis and the foundation of the combustion engine in the present invention;

[0037] Figure 5 It is a schematic diagram of the installation of the guide structure between the chassis and the foundation of the combustion engine in the present invention;

[0038] Figure 6 It is a front view of the embedded part in the present invention;

[0039] Figure 7 It is a left side view of the embedded part in the present invention;

[0040] Reference numerals:

[0041] 1-Support pad, 2-Guide pad, 3-Chassis connecting plate, 4-Transition sleeve,

[0042] 5-Secondary grouting support base plate, 6-Support plate group, 7-Support reinforcement ribs, 8-Support base plate, 9-Guide key,

[0043] 10-first guide key height positioning plate, 11-second guide key height positioning plate, 12-secondary grouting guide reference plate, 13-guide support, 14-guide bottom plate, 15-guide reinforcement rib, 16-support structure, 17-engine chassis,

[0044] 18-adjusting gasket, 19-connecting bolt, 20-connecting nut, 21-round gasket, 22-secondary grouting foundation,

[0045] 23-reserved pit, 24-primary grouting foundation, 25-embedded parts, 26-guide groove, 27-embedded steel bars,

[0046] 28-connecting steel plate, 29-embedded steel plate. DETAILED DESCRIPTION

[0047] In order to make the purpose and technical solution of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention.

[0048] In the description of the present application, it should be understood that the terms "length", "up", "down", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0049] In order to make the purpose and technical solution of the embodiments of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention.

[0050] A connection structure between a gas turbine chassis and a foundation, comprising a support structure 16 and a guide structure; the support structure 16 is formed by, from top to bottom, a chassis connection plate 3, a transition sleeve 4, a secondary grouting support reference plate 5, a support plate group 6 and a support bottom plate fixedly connected; the guide structure is formed by, from top to bottom, a guide key 9, a secondary grouting guide reference plate 12, a guide support member 13 and a guide bottom plate 14 fixedly connected.

[0051] The connection structure provided by the present invention is described as follows for the support structure 16 and the guide structure:

[0052] Support structure 16 as attached Figure 2 As shown, it mainly plays a supporting role and transfers the load on the chassis to the foundation. The support structure 16 is mainly formed by the chassis connecting plate 3, the transition sleeve 4, the secondary grouting support reference plate 5, the support plate group 6, the support bottom plate 8, and the support reinforcement rib 7. In this embodiment, the fixed connection is welded.

[0053] The chassis connecting plate 3 is located at the top of the supporting structure 16 and is used to connect with the supporting pad at the bottom of the chassis.

[0054] The transition sleeve 4 is located below the chassis connecting plate 3 , and has through holes thereon for absorbing the deformation of the supporting structure 16 when it is subjected to stress.

[0055] The secondary grouting support reference plate 5 serves as a reference piece for limiting the secondary grouting height, indicating that the secondary grouting height is flush with the upper surface of the secondary grouting support reference plate 5 when the support structure is installed.

[0056] The support plate group 6 is formed by welding several rectangular plates and is used to connect the secondary grouting support reference plate 5 and the support bottom plate 8.

[0057] The support base plate 8 is located at the bottom of the support structure 16 , transmits the force borne by the support structure 16 to the foundation, and ensures the stability of the entire support structure 16 .

[0058] The support reinforcement ribs 7 are welded to the support plate group 6 to increase the rigidity of the support plate group 6 and increase the friction between the support plate group 6 and the secondary grouting foundation 22 .

[0059] Guide structure as attached Figure 3 As shown, it mainly plays a guiding role, guiding the engine chassis 17 and the foundation to expand freely in a certain direction. The guiding structure is formed by the guide key 9, the first guide key height positioning plate 10, the second guide key height positioning plate 11, the secondary grouting guide reference plate 12, the guide support 13, the guide bottom plate 14 and the guide reinforcement rib 15, which are fixedly connected. In this embodiment, the fixed connection is welded.

[0060] The guide key 9 is located at the top of the guide structure, and is used to cooperate with the guide groove 26 on the guide pad 2 at the bottom of the engine chassis to guide the engine chassis 17 to expand freely in the axial direction. A first guide key height positioning plate 10 is fixed at the bottom of the guide key 9, which is used to fix the distance between the guide key 9 and the secondary grouting guide reference plate 12 to appropriately reduce the thickness of the guide key 9 and save costs. The second guide key height positioning plate 11 is symmetrically fixed on the outer side wall of the first guide key height positioning plate 10. The first guide key height positioning plate 10 is processed with a through hole to absorb the deformation of the guide key 9 when it is subjected to chassis load.

[0061] The secondary grouting guide reference plate 12 is used as a reference piece for limiting the secondary grouting height, indicating that when the guide structure is installed, the secondary grouting height is flush with the upper surface of the secondary grouting guide reference plate 12. The secondary grouting guide reference plate 12 is symmetrically provided with mounting threaded holes.

[0062] The guide support member 13 is used to connect the secondary grouting guide reference plate 12 and the bottom plate. In this embodiment, an I-beam structure is adopted, which has strong rigidity and can withstand a larger load.

[0063] The guide bottom plate 14 is located at the bottom of the guide structure, transmits the force borne by the guide structure to the foundation, and ensures the stability of the entire guide structure.

[0064] The guide reinforcement ribs 15 are welded to the guide support member 13 to increase the rigidity of the guide support member 13 and increase the friction between the guide support member 13 and the secondary grouting foundation 22 .

[0065] When the supporting structure 16 and the guiding structure are actually installed, they need to be installed in coordination with the relevant pads provided on the engine chassis 17, as shown in the attached Figure 1 , Attachment Figure 4 and attached Figure 5 As shown, the engine chassis 17 is evenly provided with a plurality of supporting pads 1, which are used to connect with the supporting structure 16 and support the load of all equipment on the front and rear ends of the engine chassis 17. A guiding pad 2 is provided in the middle position of the rear end of the engine chassis 17, which is used to cooperate with the guiding structure and guide the chassis to expand freely in the axial direction with the front end of the engine chassis 17 as the dead point when heated.

[0066] The following is a description of the installation method of the connection structure between the burner chassis and the foundation. Figure 4 The installation diagram of the support structure 16 used between the engine chassis and the foundation is shown, which schematically includes the support structure 16, the engine chassis, the adjustment gasket 18, the connecting bolts 19, the connecting nuts 20, the round gasket 21, the secondary grouting foundation 22, the reserved pit 23, the primary grouting foundation 24, and the embedded parts 25; wherein the adjustment gasket 18 can be used to adjust the gap between the engine chassis and the support structure 16.

[0067] The support structure 16 is used to support the engine chassis 17 and transfer the load on the engine chassis 17 to the foundation. A support pad 1 and a guide pad 2 are welded to the lower part of the engine chassis 17, which are respectively connected to the connection structure.

[0068] The adjusting gasket 18 is arranged on the upper surface of the supporting structure 17 or the guiding structure, and the adjusting gasket 18 is used for adjusting the gap between the engine chassis 17 and the supporting structure 16. The connecting bolt 19 is used for connecting the engine chassis and the supporting structure 16. The connecting nut 20 is used for tightening after the engine chassis and the supporting structure 16 are connected. The circular gasket 21 is tightly attached to the connecting nut 20, and is used to increase the contact area between the connecting nut 20 and the chassis connecting plate 3, while protecting the connecting surface. In addition, other adjustable connecting and fixing structures can also be provided.

[0069] The secondary grouting foundation 22 is used to pour into the reserved pit 23 to completely position the support structure 16 after the support structure 16 is connected. The reserved pit 23 is used to place the support structure 16. The primary grouting foundation 24 is used to support the entire gas turbine unit and as a carrier for the arrangement of the embedded parts 25. The embedded parts 25 are used to enhance the friction and bonding between the secondary grouting foundation 22 and the primary grouting foundation 24 after the secondary grouting is completed.

[0070] The embedded part 25 is a double U-shaped steel bar welded part. Figure 6 and Figure 7 As shown. The embedded part 25 is formed by bending two embedded steel bars 27 into a U shape, which are welded together on both sides by connecting steel plates 28, and embedded steel plates 29 are welded on the four top ends to increase the firmness of the connection with the concrete. When the concrete foundation of the gas turbine is made, the embedded part 25 is connected to the foundation steel bars, and concrete is poured to reserve a pit.

[0071] The basic process of connecting the supporting structure 16 and the engine chassis 17 is as follows: before the first grouting, the embedded parts 25 are positioned, a pit for placing the supporting structure 16 is reserved, and then the first grouting is performed. After the primary grouting foundation 24 is solidified, the support structure 16 is placed in the reserved pit 23 and temporarily fixed. The installation tool is placed at an appropriate position on the plane of the primary grouting foundation 24 and the height is adjusted. The installation tool can be a jack or other tool. The chassis is placed on the installation tool. The engine chassis 17 and the connecting equipment are centered and leveled together. Then the support structure 16 and the chassis pad are adjusted and connected by adjusting the gasket 18, the connecting bolt 19, the connecting nut 20 and the round gasket 21. Then, the secondary grouting is performed. The grouting height is the upper surface of the secondary grouting support reference plate 5 on the support structure 16. After the secondary grouting foundation 22 is solidified, the connecting bolts 19 and the connecting nuts 20 between the engine chassis 17 and the support structure 16 are fine-tuned, and the tightening degree of the connecting nut 20 is changed to adjust the parallelism between the engine chassis and the foundation. Since the adjustment gasket 18 has a certain amount of compression, it can make the engine chassis 17 and the secondary grouting foundation 22 have a better parallelism, thereby enhancing the stability of the engine.

[0072] like Figure 5 As shown, the connection method between the guide structure and the engine chassis 17 is basically the same as above, but it should be noted that the difference from the above method is:

[0073] The guide key 9 cooperates with the guide pad provided on the lower surface of the engine chassis 17. The lower surface of the guide pad is provided with a guide groove 26. Before the guide structure is placed into the reserved pit 23, it is necessary to confirm that the directions of the guide key 9 and the guide groove 26 are consistent; the initial fixation between the guide structure and the engine chassis 17 is through the connecting bolts 19, and the connecting bolts 19 initially connect and fix the engine chassis 17 and the secondary grouting guide reference plate 12. Since the guide structure mainly plays a guiding role rather than a supporting role, the connecting bolts 19 between the guide structure and the engine chassis 17 need to be removed after the secondary grouting is cured.

[0074] The above is only an embodiment of the present invention, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the patent of the present invention. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A connection structure between a combustion engine chassis and a foundation, comprising a supporting structure, characterized in that: It also includes a guide structure; the support structure is fixedly connected to the engine chassis; the guide structure is slidably connected to the guide groove of the engine chassis; The guide structure comprises a guide support member fixed in the foundation, a guide fixing plate is fixedly connected to the bottom of the guide support member, a secondary grouting guide reference plate and a first guide key height positioning plate are fixedly connected to the top of the guide support member in sequence, the upper surface of the secondary grouting guide reference plate is flush with the upper surface of the foundation, and a guide key is fixed to the upper surface of the first guide key height positioning plate; The support structure comprises a support plate group fixed in the foundation, the bottom of the support plate group is fixedly connected to a bottom plate fixing plate, the top of the support plate group is fixedly connected to a secondary grouting support reference plate, a transition sleeve and a chassis connecting plate in sequence from bottom to top, and the upper surface of the secondary grouting support reference plate is flush with the upper surface of the foundation; The second guide key height positioning plates are symmetrically fixed on both side walls of the first guide key height positioning plate; and a through hole is provided on the first guide key height positioning plate.

2. The connection structure between the chassis and the foundation of a combustion engine according to claim 1, characterized in that: The transition sleeve is in the shape of a hollow circular tube, and a through hole is provided on the side wall of the transition sleeve.

3. The connection structure between the chassis and the foundation of a combustion engine according to claim 1, characterized in that: The support plate group is a hollow structure, and is formed by welding several rectangular plates end to end.

4. The connection structure between the chassis and the foundation of a combustion engine according to claim 1, characterized in that: A plurality of protruding support reinforcement ribs are evenly arranged on the outer side wall of the support plate group, and a plurality of guide reinforcement ribs are evenly arranged on the outer side wall of the guide support member.

5. The connection structure between the chassis and the foundation of a combustion engine according to claim 1, characterized in that: The cross section of the guide key is an inverted T-shape, the upper half of the cross section is a rectangle, and the lower half of the cross section is linearly expanded outward to form an equilateral trapezoid.

6. A method for installing a support structure, characterized in that: Using the support structure as described in any one of claims 1 to 5 to be fixedly connected to the chassis of the combustion engine comprises the following steps: S1. A reserved pit for placing the support structure is reserved, a plurality of embedded parts are positioned and fixed, and a grouting is performed once and a grouting foundation is formed around the reserved pit; S2. After the primary grouting foundation is cured, the support structure is placed in the reserved pit and temporarily fixed, and the installation tool is placed at an appropriate position on the upper plane of the primary grouting foundation and the height of the installation tool is adjusted; S3. The engine chassis is placed on the installation tool, and after horizontal correction and position alignment, the support structure and the chassis are adjusted and connected by connecting bolts, connecting nuts and adjusting gaskets; S4. Carry out secondary grouting. After the secondary grouting foundation is solidified, adjust the tightening degree of the connecting nuts to adjust the parallelism between the engine chassis and the foundation.

7. A method for installing a guide structure, characterized in that: The guide structure as claimed in any one of claims 1 to 5 is used to cooperate with the chassis of the combustion engine, comprising the following steps: S1. A reserved pit for placing the guide structure is reserved, a plurality of embedded parts are positioned and fixed, and a grouting is performed once and a grouting foundation is formed around the reserved pit; S2. After the primary grouting foundation is cured, the guide structure is temporarily fixed into the reserved pit, and the installation tool is placed at an appropriate position on the upper plane of the primary grouting foundation and the height of the installation tool is adjusted; S3. The engine chassis is placed on the installation tool, and after horizontal correction and position alignment, the guide structure and the chassis are initially fixedly connected by connecting bolts; S4. Perform secondary grouting, and after the secondary grouting foundation is solidified, remove the connecting bolts.

8. The method for installing the guide structure according to claim 7, characterized in that: In step S2, a guide pad is provided on the lower surface of the engine chassis, a guide groove is provided on the lower surface of the guide pad, and the guide key is in the same direction as the guide groove.

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