Bottom skid device of natural gas compressor unit

Abstract

The utility model relates to a bottom skid device of a natural gas compressor unit, and relates to the technical field of auxiliary mounting equipment of the natural gas compressor unit. The bottom skid device comprises a compressor bottom skid and a driver bottom skid, wherein the compressor bottom skid and the driver bottom skid are fixedly connected together; the bottom skid device further comprises an engine mounting support assembly used for mounting and connecting an engine and a motor mounting support assembly used for mounting and connecting a motor. The engine mounting support assembly and the motor mounting support assembly can be detachably mounted on the upper side of the driver bottom sledge. According to the bottom skid device, the fuel-driven natural gas compressor unit and the electric-driven natural gas compressor unit can be interchanged under the condition that fire does not work on site. The detachable engine mounting support assembly and the detachable motor mounting support assembly ensure that the bottom skid can meet the mounting requirements of a combustion-driven natural gas compressor unit and an electric-driven natural gas compressor unit at the same time, the field workload is reduced, potential safety hazards caused by fire operation are eliminated, transformation is convenient, and cost is low.

Description

Technical Field

[0001] This application relates to the technical field of auxiliary installation equipment for natural gas compressor units, and in particular, to a skid device for a natural gas compressor unit. Background Art

[0002] As a new energy source, natural gas has the characteristics of low cost, high efficiency, pollution-free, safe and convenient use, etc., and is increasingly showing strong development potential. Natural gas compressor units, as important equipment for natural gas transportation and storage, play a crucial role in oil and gas field development and natural gas transportation. The common driving methods of natural gas compressor units are fuel-driven and electric-driven. The fuel-driven is suitable for the upstream oil and gas fields in remote areas with limited power supply; while the electric-driven has the advantages of energy conservation, environmental protection, low noise, and low maintenance cost, and is more suitable for areas with stable power supply. Converting from fuel-driven to electric-driven not only helps to achieve the national energy conservation and emission reduction goals, but also realizes the transformation of equipment localization, further saving the equipment maintenance cost. In the prior art, the conversion between fuel-driven and electric-driven requires multiple steps. Generally, if you want to achieve the conversion from fuel-driven to electric-driven, you first need to completely remove the original engine and its supporting systems, including the engine body, fuel gas intake system, jacket water and auxiliary water cooling system, water and oil replenishment system, exhaust system, control system, etc. Subsequently, it is also necessary to remove the auxiliary skid of the original engine. Since the auxiliary skid of the engine is integrally connected to the main skid of the compressor, cutting and removal operations need to be carried out on the main skid. Next, design a new motor auxiliary skid, and after completing the on-site welding and assembly, then carry out epoxy resin grouting and fixing. When installing the drive motor on the motor auxiliary skid, a series of fixing work also needs to be carried out according to the actual site, and ensure the precise alignment of the drive motor and the compressor. During the conversion process from fuel-driven to electric-driven, the largest workload on site is to replace the auxiliary skid, and the process is relatively complex and cumbersome, which requires a lot of time and energy. Moreover, the existing replacement method has relatively large safety hazards. mainly because the operating environment of the natural gas compressor unit is an explosion-proof area of Zone 2. During the process of replacing the auxiliary skid, cutting and welding operations will generate flames and sparks, posing a relatively high safety risk. Summary of the Utility Model

[0003] In order to improve the convenience and safety of the conversion and installation between fuel-driven and electric-driven in natural gas compressor units, this application provides a skid device for a natural gas compressor unit.

[0004] The skid device for a natural gas compressor unit provided by this application adopts the following technical solutions:

[0005] A skid device for a natural gas compressor unit, comprising a compressor skid and a driver skid, wherein the compressor skid and the driver skid are fixedly connected together; the skid device further comprises an engine mounting support assembly for mounting and connecting an engine and a motor mounting support assembly for mounting and connecting a motor; both the engine mounting support assembly and the motor mounting support assembly can be detachably mounted on the upper side of the driver skid.

[0006] In this application, the compressor skid and the driver skid are fixedly connected together to form a common skid body, and the compressor body is fixedly mounted on the compressor skid; when the natural gas compressor unit is driven by fuel, its engine is mounted on the driver skid through the engine mounting support assembly; when the natural gas compressor unit is driven by electricity, its motor is mounted on the driver skid through the motor mounting support assembly.

[0007] By adopting the above technical solutions, the entire skid device can realize the interchange of fuel-driven and electric-driven natural gas compressor units without hot work on site. The detachable engine mounting support assembly and motor mounting support assembly ensure that the skid can adapt to the installation requirements of both fuel-driven and electric-driven natural gas compressor units at the same time, which not only reduces the on-site workload but also eliminates the safety hazards brought by hot work operations. Compared with the previous engine auxiliary skid or motor auxiliary skid, the skid device in this application hardly increases the cost during the later transformation process, is more flexible, greatly reduces the transformation cost, and also shortens the transformation cycle a lot.

[0008] Optionally, one end of the driver skid is fixedly connected to one side of the compressor skid, and the upper surface of the driver skid is lower than the upper surface of the compressor skid; several groups of first cofferdams are arranged on the compressor skid, and several first connection holes for connecting the compressor are opened at the bottom of the first cofferdams; several groups of second cofferdams are arranged on the driver skid, and second connection holes for mounting and connecting the engine mounting support assembly or the motor mounting support assembly are opened at the bottom of the second cofferdams.

[0009] The first cofferdams and the second cofferdams are used for pouring epoxy resin for encapsulation, and fasteners such as bolts are inserted into the first connection holes and the second connection holes. By adopting the above technical solutions, it is convenient for installation and connection, and at the same time, it can ensure the precise alignment and transmission connection between the drive motor and the compressor.

[0010] Optionally, several groups of second cofferdams provided on the driver skid are spaced along the length direction of the driver skid; the engine mounting support assembly includes an engine front-end mounting support for mounting and connecting the front end of the engine and an engine rear-end mounting support for mounting and connecting the rear end of the engine; the motor mounting support assembly includes a motor front-end mounting support for mounting and connecting the front end of the motor and a motor rear-end mounting support for mounting and connecting the rear end of the motor; several groups of the second cofferdams are used for mounting the engine front-end mounting support, the motor front-end mounting support, the motor rear-end mounting support, and the engine rear-end mounting support in sequence from one end of the driver skid close to the compressor skid to the other end.

[0011] By adopting the above technical solution, when the natural gas compressor unit is driven by fuel, the engine is mounted on the driver skid through the engine front-end mounting support and the engine rear-end mounting support; when the natural gas compressor unit is driven by electricity, the motor is mounted on the driver skid through the motor front-end mounting support and the motor rear-end mounting support.

[0012] Optionally, the engine front-end mounting support, the motor front-end mounting support, the motor rear-end mounting support, and the engine rear-end mounting support all include a seat body and a backing plate. The seat body is arranged on the backing plate, and a connecting bolt assembly is arranged on the seat body; the second cofferdam is used for filling epoxy resin, and the seat body and the backing plate can be fixedly connected to the corresponding second cofferdam on the driver skid through a foundation bolt assembly inserted into the second connection hole.

[0013] By adopting the above technical solution, the engine front-end mounting support, the motor front-end mounting support, the motor rear-end mounting support, and the engine rear-end mounting support are all detachably connected to the driver skid through the foundation bolt assembly, and the engine or the motor is fixedly connected to the engine mounting support assembly or the motor mounting support assembly through the connecting bolt assembly, ensuring the stable installation of the engine and the motor on the driver skid and improving the reliability of equipment operation.

[0014] Optionally, the connecting bolt assembly includes a hexagon bolt, a first flat washer, and a spring washer. The hexagon bolt passes upward through the seat body, and the first flat washer and the spring washer are sleeved on the hexagon bolt and located between the head of the hexagon bolt and the side surface of the seat body; the foundation bolt assembly includes a stud and hexagon nuts, hexagon thin nuts, and second flat washers located at both ends of the stud; the stud passes upward through the second connection hole, the backing plate, and the seat body in sequence.

[0015] By adopting the above technical solution, the convenience and stable reliability of the assembly and connection of each component can be ensured.

[0016] Optionally, a spacing tube is sleeved on the stud. One end of the spacing tube abuts against the second flat washer at the lower end of the stud, and the other end abuts against the side surface of the driver skid.

[0017] By adopting the above technical solution, the spacing tube enables the stud to be lengthened, improving the connection strength between the engine or motor and the driver skid, thereby enhancing the safety of equipment operation.

[0018] Optionally, a protective sleeve is also sleeved on the stud. When the stud is inserted into the second connection hole, the protective sleeve is located within the second cofferdam.

[0019] By adopting the above technical solution, the protective sleeve can prevent the anchor bolt assembly from being fixed by epoxy resin after grouting, facilitating later maintenance and replacement.

[0020] Optionally, an adjusting shim is further provided between the seat body and the backing plate; a jackscrew is provided on the driver skid corresponding to each of the second cofferdams. The jackscrew passes upward through the bottom of the corresponding second cofferdam and extends to the lower side of the corresponding backing plate; the seat body is provided with a down jackscrew that passes downward through the seat body and extends to the upper side of the corresponding backing plate.

[0021] By adopting the above technical solution, when installing the front mounting support of the engine, the front mounting support of the motor, the rear mounting support of the motor, and the rear mounting support of the engine, the height positions of the seat body and the backing plate are adjusted by using the jackscrews, thereby adjusting the height positions of the engine and the motor to ensure accurate alignment between the engine or motor and the compressor, and further enhancing the stability and reliability of equipment operation.

[0022] Optionally, a support is provided on the driver skid on one side of the second cofferdam. A side jackscrew is screwed on the support, and the end of the side jackscrew can abut against the side surface of the corresponding seat body.

[0023] By adopting the above technical solution, when installing the front mounting support of the engine, the front mounting support of the motor, the rear mounting support of the motor, and the rear mounting support of the engine, the lateral position of the seat body is adjusted by using the side jackscrew, thereby ensuring accurate alignment between the engine or motor and the compressor.

[0024] Optionally, the driver skid is made of H-shaped steel. There is a side brace on the outer side of the top of the driver skid. A vertical rib is provided between the side brace and the outer side of the driver skid. A counterweight assembly is further provided in the middle of the driver skid.

[0025] By adopting the above technical solution, the structural stability and lightweight requirements of the driver skid are ensured.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. The drive machine skid in the present application has the installation conditions for both the engine and the motor at the same time, which can reduce the types of products, facilitate the standardized design of products, thereby improving production efficiency, and can also be mass-produced to meet different needs of customers.

[0028] 2. The skid device in the present application can realize the interchange of the combustion-driven and electric-driven natural gas compressor units without hot work on site. The detachable engine mounting support assembly and motor mounting support assembly ensure that the skid can adapt to the installation requirements of both the combustion-driven and electric-driven natural gas compressor units at the same time, which not only reduces the on-site workload but also eliminates the safety hazards brought by hot work operations.

[0029] 3. Compared with the previous engine sub-skid or motor sub-skid, the skid device in the present application hardly increases the cost during the later transformation process, is more flexible, and the transformation cost is greatly reduced, and the transformation cycle is also shortened a lot. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 is a schematic three-dimensional structure diagram of the skid device in the present application.

[0031] Figure 2 is a sectional view showing the installation and connection of the engine mounting support assembly and the motor mounting support assembly to the drive machine skid in the present application.

[0032] Figure 3 is a schematic three-dimensional structure diagram of the compressor skid and the drive machine skid in the present application.

[0033] In the figure:

[0034] 10. Compressor skid; 11. First cofferdam; 12. First connection hole;

[0035] 20. Drive machine skid; 21. Second cofferdam; 22. Second connection hole; 23. Side brace; 24. Vertical rib; 25. Counterweight assembly;

[0036] 30. Engine mounting support assembly; 31. Engine front mounting support; 32. Engine rear mounting support;

[0037] 40. Motor mounting support assembly; 41. Motor front mounting support; 42. Motor rear mounting support;

[0038] 51. Seat body; 52. Base plate; 53. Connecting bolt assembly; 54. Anchor bolt assembly; 55. Spacer tube; 56. Protective sleeve; 57. Adjusting gasket;

[0039] 60. Upward jackscrew;

[0040] 70. Downward set screw;

[0041] 80. Support;

[0042] 90. Side set screw. Specific implementation manner

[0043] The following will combine with the attached Figure 1 - attached Figure 3 To clearly and completely describe the technical solutions in the embodiments of the present utility model. The described embodiments are only possible technical implementations of the present utility model, not all possible implementations. Those skilled in the art can fully combine the embodiments of the present utility model to obtain other embodiments without creative labor, and these embodiments are also within the protection scope of the present utility model.

[0044] Currently, there are two common driving methods for natural gas compressor units: gas-driven and electric-driven. In areas with power restrictions, gas-driven is usually selected, while in areas with stable power supply, electric-driven is chosen. When converting a gas-driven natural gas compressor unit to an electric-driven one, the engine and its auxiliary systems need to be removed, and the original auxiliary skid needs to be cut and welded. This process is not only time-consuming and laborious but also poses safety hazards. Therefore, this application mainly adopts a common skid for gas-driven and electric-driven natural gas compressor units to achieve the interchange between gas-driven and electric-driven without hot work on-site, reducing safety hazards and renovation costs, and achieving the effects of improving renovation flexibility and safety and reducing costs.

[0045] Referring to Figure 1 and Figure 2 As shown, a skid device for a natural gas compressor unit provided by an embodiment of this application includes a compressor skid 10 and a driver skid 20. The compressor skid 10 and the driver skid 20 are integrally formed or welded and fixedly connected together to form a common skid body. One end of the driver skid 20 is fixedly connected to one side of the compressor skid 10, and the upper surface of the driver skid 20 is lower than the upper surface of the compressor skid 10; the compressor main body is fixedly installed on the compressor skid 10; when the natural gas compressor unit is gas-driven, its engine is installed on the driver skid 20 through an engine mounting support assembly 30; when the natural gas compressor unit is electric-driven, its motor is installed on the driver skid 20 through a motor mounting support assembly 40. An engine mounting support assembly 30 for installing and connecting the engine and a motor mounting support assembly 40 for installing and connecting the motor are provided on the driver skid 20; both the engine mounting support assembly 30 and the motor mounting support assembly 40 can be detachably installed on the upper side of the driver skid 20.

[0046] Referring to Figure 3As shown, several groups of first cofferdams 11 are provided on the compressor skid 10, and several first connection holes 12 for connecting the compressor are opened at the bottom of the first cofferdams 11; several groups of second cofferdams 21 are provided on the driver skid 20, and second connection holes 22 for installing and connecting the engine mounting support assembly 30 or the motor mounting support assembly 40 are opened at the bottom of the second cofferdams 21. The first cofferdams 11 and the second cofferdams 21 are used for pouring epoxy resin for encapsulation to ensure the fixing strength between each component. Both the first cofferdams 11 and the second cofferdams 21 are welded by multiple steel plates, and the thickness of the steel plates is usually about 5 mm, and the material is Q235A. The shape of the cofferdams can be designed as circular or rectangular according to actual needs to adapt to the requirements of different installation sites. Fasteners such as bolts are inserted into the first connection holes 12 and the second connection holes 22, which is convenient for installation and connection, and can ensure the accurate alignment and transmission connection between the drive motor and the compressor.

[0047] Furthermore, in this application, the driver skid 20 is made of H-shaped steel. There are side braces 23 on the outer side of the top of the driver skid 20, and vertical ribs 24 are provided between the side braces 23 and the outer side of the driver skid 20, which ensures the structural stability and lightweight requirements of the driver skid 20. A counterweight assembly 25 is also provided in the middle of the driver skid 20. The counterweight assembly 25 is composed of steel bars and concrete, and its function is to lower the center of gravity of the entire unit and improve the operation stability of the equipment.

[0048] Refer to Figure 1 and Figure 2 As shown, several groups of second cofferdams 21 provided on the driver skid 20 in this application are spaced along the length direction of the driver skid 20; there are two second cofferdams 21 in each group and they are spaced relatively. Specifically, there are two rows of second cofferdams 21, with four in each row. The engine mounting support assembly 30 includes an engine front mounting support 31 for installing and connecting the front end of the engine and an engine rear mounting support 32 for installing and connecting the rear end of the engine; the motor mounting support assembly 40 includes a motor front mounting support 41 for installing and connecting the front end of the motor and a motor rear mounting support 42 for installing and connecting the rear end of the motor; several groups of second cofferdams 21 are used for installing the engine front mounting support 31, the motor front mounting support 41, the motor rear mounting support 42, and the engine rear mounting support 32 in sequence from the end of the driver skid 20 close to the compressor skid 10 to the other end. When the natural gas compressor unit is driven by fuel, the engine is installed on the driver skid 20 through the engine front mounting support 31 and the engine rear mounting support 32; when the natural gas compressor unit is driven by electricity, the motor is installed on the driver skid 20 through the motor front mounting support 41 and the motor rear mounting support 42.

[0049] Refer to Figure 1 and Figure 2As shown in the figure, the front engine mounting bracket 31, the front motor mounting bracket 41, the rear motor mounting bracket 42, and the rear engine mounting bracket 32 in the present application all include a seat body 51 and a backing plate 52. The seat body 51 is disposed on the backing plate 52, and a connecting bolt assembly 53 is provided on the seat body 51. The second cofferdam 21 is used to fill epoxy resin. The seat body 51 and the backing plate 52 can be fixedly connected to the corresponding second cofferdam 21 on the drive machine skid 20 through the anchor bolt assembly 54 inserted into the second connection hole 22. The front engine mounting bracket 31, the front motor mounting bracket 41, the rear motor mounting bracket 42, and the rear engine mounting bracket 32 are all detachably connected to the drive machine skid 20 through the anchor bolt assembly 54, and the engine or the motor is fixedly connected to the engine mounting bracket assembly 30 or the motor mounting bracket assembly 40 through the connecting bolt assembly 53.

[0050] Further, in the present application, the connecting bolt assembly 53 includes a hexagon bolt, a first flat washer, and a spring washer. The hexagon bolt passes upward through the seat body 51, and the first flat washer and the spring washer are sleeved on the hexagon bolt and located between the head of the hexagon bolt and the side surface of the seat body 51. The anchor bolt assembly 54 includes a stud and hexagon nuts, hexagon thin nuts, and second flat washers located at both ends of the stud. The stud passes upward through the second connection hole 22, the backing plate 52, and the seat body 51 in sequence.

[0051] Refer to Figure 2 As shown in the figure, a spacer tube 55 is sleeved on the stud. One end of the spacer tube 55 abuts against the second flat washer at the lower end of the stud, and the other end abuts against the side surface of the drive machine skid 20. The spacer tube 55 enables the stud to be lengthened, improves the connection strength between the engine or the motor and the drive machine skid, and thus enhances the safety of equipment operation. A protective sleeve 56 is also sleeved on the stud. When the stud is inserted into the second connection hole 22, the protective sleeve 56 is located in the second cofferdam 21. The protective sleeve 56 can prevent the anchor bolt assembly 54 from being fixed by epoxy resin after grouting, which is convenient for later maintenance and replacement.

[0052] Refer to Figure 1 and Figure 2As shown in the figure, an adjusting gasket 57 is further provided between the seat body 51 and the backing plate 52; a jackscrew 60 is provided on the driving machine skid 20 corresponding to each second cofferdam 21. The jackscrew 60 passes upward through the bottom of the corresponding second cofferdam 21 and extends to the lower side of the corresponding backing plate 52. A protective sleeve 56 can also be sleeved on the jackscrew 60 to prevent the jackscrew 60 from being fixed by epoxy resin after grouting, which is convenient for later maintenance and replacement; the seat body 51 is provided with a down jackscrew 70, and the down jackscrew 70 passes downward through the seat body 51 and extends to the upper side of the corresponding backing plate 52. A support 80 is provided on the driving machine skid 20 on one side of the second cofferdam 21, and a side jackscrew 90 is screwed on the support 80. The end of the side jackscrew 90 can abut against the side surface of the corresponding seat body 51; multiple groups of the support 80 and the side jackscrew 90 can be provided and are respectively arranged in the transverse and longitudinal directions of the second cofferdam 21. When installing the front mounting support 31 of the engine, the front mounting support 41 of the motor, the rear mounting support 42 of the motor, and the rear mounting support 32 of the engine, the height positions of the seat body 51 and the backing plate 52 are adjusted by using the up jackscrew 60 and the down jackscrew 70, so as to adjust the height positions of the engine and the motor. The lateral and longitudinal positions of the seat body 51 are adjusted by using the side jackscrew 90 to ensure the accurate alignment of the engine or the motor with the compressor, thereby improving the stability and reliability of the equipment operation.

[0053] The implementation principle of this embodiment is as follows: By improving the skid structure of the traditional gas-driven and electric-driven natural gas compressor units, it can realize the rapid interchange of gas drive and electric drive under the condition of no on-site fire. This shared skid solution combines the advantages of various components, making it unnecessary to perform complex disassembly and assembly operations during the transformation process, reducing the on-site workload, and ensuring the safety of the operation. In addition, this skid device solution also has good interchangeability and compatibility, reducing the modification of existing equipment and helping to save the transformation cost.

[0054] The embodiments of this specific implementation manner are all preferred embodiments of this application, and do not limit the protection scope of this application accordingly. The same components are denoted by the same reference numerals. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A skid device for a natural gas compressor unit, comprising a compressor skid (10) and a driver skid (20), wherein the compressor skid (10) and the driver skid (20) are fixedly connected together; characterized in that, The skid device further includes an engine mounting support assembly (30) for mounting and connecting the engine and a motor mounting support assembly (40) for mounting and connecting the motor; both the engine mounting support assembly (30) and the motor mounting support assembly (40) can be detachably mounted on the upper side of the drive skid (20).

2. The skid device of the natural gas compressor unit according to claim 1, characterized in that, One end of the drive skid (20) is fixedly connected to one side of the compressor skid (10), and the upper surface of the drive skid (20) is lower than the upper surface of the compressor skid (10); several groups of first cofferdams (11) are provided on the compressor skid (10), and several first connection holes (12) for connecting the compressor are opened at the bottom of the first cofferdams (11); several groups of second cofferdams (21) are provided on the drive skid (20), and second connection holes (22) for mounting and connecting the engine mounting support assembly (30) or the motor mounting support assembly (40) are opened at the bottom of the second cofferdams (21).

3. The skid device of the natural gas compressor unit according to claim 2, characterized in that, The several groups of second cofferdams (21) provided on the drive skid (20) are spaced along the length direction of the drive skid (20); the engine mounting support assembly (30) includes an engine front-end mounting support (31) for mounting and connecting the front end of the engine and an engine rear-end mounting support (32) for mounting and connecting the rear end of the engine; the motor mounting support assembly (40) includes a motor front-end mounting support (41) for mounting and connecting the front end of the motor and a motor rear-end mounting support (42) for mounting and connecting the rear end of the motor; the several groups of second cofferdams (21) are used for mounting the engine front-end mounting support (31), the motor front-end mounting support (41), the motor rear-end mounting support (42), and the engine rear-end mounting support (32) in sequence from the end of the drive skid (20) close to the compressor skid (10) to the other end.

4. The skid device of the natural gas compressor unit according to claim 3, characterized in that, The engine front-end mounting support (31), the motor front-end mounting support (41), the motor rear-end mounting support (42), and the engine rear-end mounting support (32) all include a seat body (51) and a backing plate (52), the seat body (51) is arranged on the backing plate (52), and a connecting bolt assembly (53) is arranged on the seat body (51); the second cofferdam (21) is used for filling epoxy resin, and the seat body (51) and the backing plate (52) can be fixedly connected to the corresponding second cofferdam (21) on the drive skid (20) through anchor bolt assemblies (54) inserted into the second connection holes (22).

5. The skid device of the natural gas compressor unit according to claim 4, characterized in that, The connecting bolt assembly (53) includes a hexagon bolt, a first flat washer and a spring washer. The hexagon bolt passes upward through the seat body (51), and the first flat washer and the spring washer are sleeved on the hexagon bolt and located between the head of the hexagon bolt and the side surface of the seat body (51); the anchor bolt assembly (54) includes a stud bolt and hexagon nuts, hexagon thin nuts and second flat washers located at both ends of the stud bolt; the stud bolt passes upward through the second connection hole (22), the backing plate (52) and the seat body (51) in sequence.

6. The skid device of the natural gas compressor unit according to claim 5, characterized in that, A spacing tube (55) is sleeved on the stud bolt. One end of the spacing tube (55) abuts against the second flat washer at the lower end of the stud bolt, and the other end abuts against the side surface of the driver skid (20).

7. The skid device of the natural gas compressor unit according to claim 5, characterized in that, A protective sleeve (56) is also sleeved on the stud bolt. When the stud bolt is inserted into the second connection hole (22), the protective sleeve (56) is located within the second cofferdam (21).

8. The skid device of the natural gas compressor unit according to claim 4, characterized in that, An adjusting gasket (57) is further provided between the seat body (51) and the backing plate (52); upward jackscrews (60) are provided on the driver skid (20) corresponding to each of the second cofferdams (21). The upward jackscrews (60) pass upward through the bottom of the corresponding second cofferdam (21) and extend to the lower side of the corresponding backing plate (52); the seat body (51) is provided with downward jackscrews (70). The downward jackscrews (70) pass downward through the seat body (51) and extend to the upper side of the corresponding backing plate (52).

9. The skid device of the natural gas compressor unit according to claim 4, characterized in that, A support (80) is provided on the driver skid (20) on one side of the second cofferdam (21). A side jackscrew (90) is screwed on the support (80), and the end of the side jackscrew (90) can abut against the side surface of the corresponding seat body (51).

10. The skid device of the natural gas compressor unit according to claim 1, characterized in that, The driver skid (20) is made of H-shaped steel. The outer side of the top of the driver skid (20) has side braces (23). Vertical ribs (24) are provided between the side braces (23) and the outer side of the driver skid (20). A counterweight assembly (25) is further provided in the middle of the driver skid (20).

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