A method of installing a marine tube lance

Abstract

The present application relates to the technical fields of ocean engineering, and discloses a kind of installation method of ship pipe rack, comprising the following steps;The preliminary positioning of upper guide rail assembly;Installation of upper trolley;The installation of lower guide rail assembly;According to the well center reference line of drilling floor, the center line of lower guide rail assembly is completed, the assembly of lower guide rail assembly is completed on the drilling floor, the pad plate for fixing lower guide rail assembly is welded in the drilling floor structure, the pad plate is located below the drilling floor, and the first threaded hole is provided on the drilling floor, the epoxy pad block is poured on the drilling floor, and the third mounting hole of lower guide rail assembly, the second threaded hole and the first threaded hole are connected by bolt tightening to fix lower guide rail assembly on the drilling floor;The installation of lower trolley;The installation of column;The present application ensures that pipe rack is installed in place at one time, the deviation error between the center line of pipe rack and the wellhead center line is small, repeated correction is avoided, and the overall load capacity of lower guide rail assembly is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ocean engineering, in particular to a method for installing a ship pipe rack. BACKGROUND

[0002] The ship pipe rack is one of the main equipment of the pipe column processing system of a drilling rig, which is used for assembling, processing and storing the stands in the guide beam and moving them into and out of the guide beam as required. The pipe rack is remotely controlled by the drilling cabin and has the function of a centralizer to meet the requirement of moving the coring device fished out of the central through hole of the top drive to the coring device catwalk machine at the head of the drilling table during the operation of the ocean scientific drilling, but the existing installation of the ship pipe rack cannot achieve one-time installation in place and usually needs to be repeatedly adjusted. SUMMARY

[0003] The present application solves the problem of providing a method for installing a ship pipe rack, ensuring that the pipe rack is installed in place at one time, making the deviation error between the center line of the pipe rack and the center line of the wellhead small, avoiding repeated correction, and improving the overall load capacity of the lower guide rail assembly.

[0004] To solve the above technical problems, the present application provides a method for installing a ship pipe rack, comprising the following steps:

[0005] Step 1, preliminary positioning of the upper guide rail assembly: the crane hoists the upper guide rail into the derrick, adjusts the position of the upper guide rail assembly so that the first mounting hole of the upper guide rail assembly is aligned with the second mounting hole of the mounting base in the derrick, then lowers the upper guide rail assembly into place, and temporarily connects the first mounting hole of the upper guide rail assembly with the second mounting hole of the mounting base by bolts without tightening the bolts;

[0006] Step 2, installation of the upper trolley: temporarily remove a section of the upper rack from the upper guide rail assembly, hoist and install the upper trolley to the position where the upper rack is removed from the upper guide rail, then slowly pull the upper trolley to the bow rail locking position of the upper guide rail assembly, so that the upper motor gear of the upper trolley smoothly engages with the upper rack, and reinstall the temporarily removed upper rack on the upper guide rail assembly;

[0007] Step 3, installation of the lower guide rail assembly: according to the well center reference line of the drilling floor, the center line of the lower guide rail assembly is drawn, the assembly of the lower guide rail assembly is completed on the drilling floor, the positions of the upper guide rail assembly and the lower guide rail assembly are adjusted according to the installation drawing, the parallelism and the levelness of the upper guide rail assembly relative to the ship's center line, the parallelism and the levelness of the lower guide rail assembly relative to the ship's center line, and the spacing between the upper guide rail assembly and the lower guide rail assembly are all within the allowable range, and then the upper guide rail assembly is fastened on the installation base; according to the installation drawing, the gusset plates for fixing the lower guide rail assembly are welded in the drilling floor structure, the gusset plates are located below the drilling floor, the first threaded holes are formed in the drilling floor, the epoxy pads are cast on the drilling floor, the epoxy pads are located directly above the gusset plates, and the second threaded holes are formed in the epoxy pads and communicate with the first threaded holes, and the lower guide rail assembly is fixed on the drilling floor by screwing the third installation holes of the lower guide rail assembly, the second threaded holes and the first threaded holes.

[0008] Step 4, installation of the lower trolley: a section of the lower rack in the lower guide rail assembly is temporarily removed, the lower trolley is hoisted to the position where the lower rack of the lower guide rail is removed, the lower trolley is slowly pulled to the bow rail locking position of the lower guide rail assembly, the lower motor gear of the lower trolley is smoothly engaged with the lower rack, the parking position of the lower trolley is directly opposite to the parking position of the upper trolley, and the temporarily removed lower rack is reinstalled on the lower guide rail assembly.

[0009] Step 5, installation of the stand column: the bottom of the stand column is installed on the lower trolley, and the top of the stand column is installed on the upper trolley.

[0010] As a preferred scheme of the application, in step 1, two traction ropes are arranged at the two ends of the upper guide rail assembly respectively, the crane hoists the upper guide rail assembly through the traction ropes, when the crane hoists the upper guide rail assembly into the derrick, the upper guide rail assembly is flush with the diagonal line of the derrick, when the upper guide rail assembly approaches the installation base, the traction ropes are slowly pulled to pull the upper guide rail assembly to the installation position, the position is adjusted to align the installation holes with the installation hole of the installation base, then the upper guide rail assembly is lowered into position, and the first installation hole of the upper guide rail assembly and the second installation hole of the installation base are temporarily connected by bolts.

[0011] As a preferred scheme of the application, in step 1, the upper guide rail assembly is provided with a mounting seat plate, the first installation hole is arranged on the mounting seat plate, the top of the mounting seat plate is provided with an adjusting shaft, the upper guide rail assembly is provided with an adjusting long hole for the adjusting shaft to move along the length direction of the upper guide rail assembly, and the adjusting shaft can be locked in the adjusting long hole.

[0012] As a preferred scheme of the application, in step 2, before the upper trolley is installed, the upper guide roller, the lower guide roller and the upper motor support guide roller inside the upper trolley are temporarily removed, the upper trolley is installed at the position where the upper guide rail is removed of the upper rack, the upper guide roller and the lower guide roller are reinstalled to the upper trolley, and the spacing between the upper guide roller and the lower guide roller is adjusted to meet the design requirements; and before the eccentric bolt on the upper motor support guide roller is installed, lubricating grease is applied on the surface, the upper motor support guide roller is reinstalled to the upper trolley, and the spacing between the upper motor support guide roller and the upper rack is adjusted by adjusting the eccentric bolt to meet the design requirements.

[0013] As a preferred scheme of the application, in step 5, before the column is installed at the bottom, the upper bearing bush of the universal joint on the lower trolley is temporarily removed, the bearing surface of the universal joint on the column is coated with lubricating grease, the rotary bearing of the lower trolley is rotated to make the rotary encoder of the lower trolley face one side of the lower guide arm on the column, the column is slowly lowered so that the bearing of the universal joint on the column falls into the lower bearing bush of the universal joint on the lower trolley, then the upper bearing bush of the universal joint on the lower trolley is reinstalled, and the pipe machine is connected to the oil injection pipeline.

[0014] As a preferred scheme of the application, in step 5, before the column is installed at the top, the column clamping ring on the upper trolley is opened, the top spindle of the column is pulled into the column clamping ring by using a sling, the column clamping ring is closed, and the spacing between the spindle of the column and the column clamping ring is adjusted by adjusting the adjusting bolt and the gasket on the column clamping ring to meet the design requirements.

[0015] As a preferred scheme of the application, in step 5, the bearing surface of the universal joint on the column is coated with molybdenum disulfide grease.

[0016] The installation method of the ship pipe machine provided by the application has the following beneficial effects compared with the prior art:

[0017] The installation operation of the application is simple, the lower guide rail assembly is assembled on the drilling floor on site according to the well center reference line on the drilling floor, the upper guide rail assembly is preliminarily positioned, the position of the lower guide rail assembly and the upper guide rail assembly is finely adjusted according to the design requirements, the installation position is ensured to be accurate, and subsequent repeated adjustment is not needed; in the lower guide rail assembly, the epoxy pad is welded below the drilling floor, the installation form of the traditional epoxy pad welded above the drilling floor is changed, the stress area of the epoxy pad is increased, the overall load capacity of the lower guide rail assembly is improved, the thickness of the epoxy pad becomes continuous and uniform, and the service life of the epoxy pad is also prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the application, the drawings of the embodiments will be briefly introduced below.

[0019] Figure 1 is a structural schematic diagram of a ship pipe machine provided by the application.

[0020] Figure 2 is the structure diagram of the traction rope cooperating with the upper guide rail assembly;

[0021] Figure 3 is the structure diagram of the hoisting upper guide rail assembly;

[0022] Figure 4 is the structure diagram of the upper guide rail assembly;

[0023] Figure 5 is the structure diagram of the upper pulley cooperating with the upper guide rail assembly;

[0024] Figure 6 is the sectional structure diagram of the lower guide rail assembly;

[0025] Figure 7 is the structure diagram of the stand cooperating with the lower pulley;

[0026] Figure 8 is the structure diagram of the stand snap ring of the upper pulley;

[0027] In the figure, the upper pulley 1; the upper guide wheel 11; the lower guide wheel 12; the upper motor support guide wheel 13; the upper motor 14; the stand snap ring 15; the snap ring bearing 151; the mounting bolt 152; the gasket 153; the adjusting bolt 154; the upper guide rail assembly 2; the upper rack 21; the mounting seat plate 22; the adjusting shaft 221; the adjusting long hole 23; the lower pulley 3; the lower guide rail assembly 4; the lower rack 41; the grid 42; the cover plate 43; the steel rail 44; the fence 45; the pad plate 46; the first threaded hole 47; the epoxy pad 48; the second threaded hole 481; the upper bearing bush 491; the lower bearing bush 492; the rotary encoder 493; the stand 5; the bearing 51; the telescopic arm 6; the lower guide arm 7; the derrick 8; the traction rope 9; the drilling platform surface 10. DETAILED DESCRIPTION

[0028] The specific embodiments of the present application are described in further detail below in combination with the drawings and examples. The following examples are used to illustrate the present application, but are not used to limit the scope of the present application.

[0029] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", "top", "bottom", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. It should be understood that the terms "first", "second", and the like are used to describe various information in the present application, but these information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, the "first" information can also be referred to as "second" information without departing from the scope of the present application, and similarly, the "second" information can also be referred to as "first" information.

[0030] As Figures 1-8 shown, the installation method of the ship pipe rack of the preferred embodiment of the present application, the pipe rack includes an upper trolley 1, an upper guide rail assembly 2, a lower trolley 3, a lower guide rail assembly 4 and a stand column 5, the upper trolley 1 and the lower trolley 3 are respectively arranged at the upper and lower ends of the stand column 5, the upper trolley 1 is slidably connected with the upper guide rail assembly 2, the lower trolley 3 is slidably connected with the lower guide rail assembly 4, and the stand column 5 is provided with an extension arm 6 and a lower guide arm 7; the installation method of the ship pipe rack comprises the following steps; Step 1, preliminary positioning of the upper guide rail assembly 2: the crane hoists the upper guide rail into the derrick 8, adjusts the position of the upper guide rail assembly 2 to align the first mounting hole of the upper guide rail assembly 2 with the second mounting hole of the mounting base in the derrick 8, then lowers the upper guide rail assembly 2 into position, and temporarily connects the first mounting hole of the upper guide rail assembly 2 with the second mounting hole of the mounting base by bolts, without tightening the bolts (not tightening the torque temporarily), so as to accurately adjust the position of the upper guide rail assembly 2 subsequently;

[0031] Step 2, installation of the upper trolley 1: temporarily remove a section of the upper rack 21 in the upper guide rail assembly 2, hoist and install the upper trolley 1 to the position where the upper guide rail is removed from the upper rack 21, then slowly pull the upper trolley 1 to the bow rail locking position of the upper guide rail assembly 2, so that the upper motor 14 gear of the upper trolley 1 smoothly engages with the upper rack 21 without jamming, and the temporarily removed upper rack 21 is reinstalled on the upper guide rail assembly 2;

[0032] Step 3, installation of the lower guide rail assembly 4: according to the well center reference line of the drilling floor 10, the center line of the lower guide rail assembly 4 is drawn, the assembly of the lower guide rail assembly 4 is completed on the drilling floor 10, and attention is paid to the orientation of the lower guide rail assembly 4 during placement. The side of the lower guide rail assembly 4 with the protective cover plate 43 mounting screw hole faces the well center, the connection screw position number needs to be matched, the lower rack 41 is installed, the installation gap of the lower rack 41 is checked using the rack as a template, and if there is a problem, the connection screw is adjusted. The grating 42, cover plate 43, and adjusting bolt 154 and the temporary top wire around are used to adjust the lower guide rail into place. The end stop plate and angle steel of the lower guide rail assembly 4 are installed. According to the installation drawing, the position of the upper guide rail assembly 2 and the lower guide rail assembly 4 is adjusted so that the parallelism and levelness of the upper guide rail assembly 2 relative to the ship's centerline, the parallelism and levelness of the lower guide rail assembly 4 relative to the ship's centerline, and the spacing between the upper guide rail assembly 2 and the lower guide rail assembly 4 are within the allowable range. Then the upper guide rail assembly 2 is fastened to the installation base. According to the installation drawing, the gusset plate 46 for fixing the lower guide rail assembly 4 is welded inside the drilling floor structure. The gusset plate 46 is located below the drilling floor 10 and has a first threaded hole 47 formed in the drilling floor 10. The epoxy pad 48 is cast on the drilling floor 10, directly above the gusset plate 46. The epoxy pad 48 has a second threaded hole 481 formed therein, which is in communication with the first threaded hole 47. The lower guide rail assembly 4 is fixed to the drilling floor by screwing a bolt through the third mounting hole of the lower guide rail assembly 4, the second threaded hole 481, and the first threaded hole 47. Before casting the epoxy pad 48, clean the area around the epoxy pad 48 and the screw hole of foreign matter. The gusset plate 48 is spot welded to the surrounding edge 45. The epoxy pad 48 is cast according to the relevant process.

[0033] Step 4, installation of the lower trolley 3: temporarily remove a section of the lower rack 41 from the lower guide rail assembly 4, and apply lubricating grease to the remaining lower racks 41. Hoist the lower trolley 3 to the position where the lower rack 41 of the lower guide rail assembly 4 is removed, and then slowly pull the lower trolley 3 to the bow rail locking position of the lower guide rail assembly 4. The lower motor gear of the lower trolley 3 smoothly engages with the lower rack 41 without jamming. The parking position of the lower trolley 3 is directly opposite the parking position of the upper trolley 1. The temporarily removed lower rack 41 is reinstalled on the lower guide rail assembly 4. Check and confirm that the gear-to-rack clearance meets the requirements. Install the remaining protective cover plates 43.

[0034] Step 5, installation of the stand 5: install the bottom of the stand 5 on the lower trolley 3 and install the top of the stand 5 on the upper trolley 1.

[0035] Illustrative, said step 1, in the two ends of the upper rail assembly 2 respectively set two traction ropes 9, hoist by traction rope 9 hoist upper rail assembly 2, and the hoist will be hoisted into the upper rail assembly 2 wellhead 8, the upper rail assembly 2 wellhead 8 diagonal line flush, when the upper rail assembly 2 close to the installation base, slowly pull the traction rope 9 will be pulled to the installation position of the upper rail assembly 2, adjust the position to make the installation hole and wellhead 8 installation base installation hole alignment, then put the upper rail assembly 2 into position, and the first mounting hole of the upper rail assembly 2 and the second mounting hole of the installation base are temporarily connected by bolts; can quickly adjust the installation position of the upper rail assembly 2.

[0036] Illustrative, said step 1, the upper rail assembly 2 is provided with a mounting seat plate 22, the first mounting hole is provided on the mounting seat plate 22, the top of the mounting seat plate 22 is provided with an adjusting shaft 221, the upper rail assembly 2 is provided with an adjusting long hole 23 which allows the adjusting shaft 221 to move along the length direction of the upper rail assembly 2, and the adjusting shaft 221 can be locked on the adjusting long hole 23, so as to avoid the situation that the first mounting hole on the upper rail assembly 2 cannot be aligned with the second mounting hole of the mounting seat plate 22 when the upper rail assembly 2 is adjusted to the accurate position, so as to realize the adjustment of the position of the first mounting hole without moving the upper rail assembly 2, improve the installation convenience and universality.

[0037] Illustrative, said step 2, before installing the upper trolley 1, temporarily remove the upper pulley 11, the lower pulley 12 and the upper motor support pulley 13 on the inner side of the upper trolley 1, set a platform under the pulley during the pulley removal process to prevent the pulley from falling; then install the upper trolley 1 at the position where the upper rail is removed from the rack 21, then reinstall the upper pulley 11, the lower pulley 12 to the upper trolley 1, and adjust the distance between the upper pulley 11 and the lower pulley 12 to meet the design requirements; and before installing the eccentric bolt on the upper motor support pulley 13, smear lubricating grease on the surface, then reinstall the upper motor support pulley 13 to the upper trolley 1, adjust the eccentric bolt to make the distance between the upper motor support pulley 13 and the rack 21 meet the design requirements, and then reinstall the temporarily removed rack 21, rail, platform, drag chain and other accessories in the original position.

[0038] Illustratively, in step 5, before installing the bottom of the column 5, temporarily remove the upper bearing bushing 491 of the universal joint on the trolley 3, check whether the hydraulic pipe, cable and the like on the column 5 affect hoisting or installation, and the easily damaged parts need to be well protected, the surface of the bearing 51 of the universal joint on the column 5 is smeared with lubricating grease, the rotating bearing 51 of the trolley 3 is rotated to make the rotary encoder 493 of the trolley 3 face one side of the lower guide arm 7 on the column 5, then the column 5 is slowly lowered, the bearing 51 of the universal joint on the column 5 falls into the lower bearing bushing 492 of the universal joint on the trolley 3, and the column 5 is kept in a vertical state, the maximum deflection is not more than 3 degrees; then the upper bearing bushing 491 of the universal joint on the trolley 3 is reinstalled, and the oil injection pipeline of the pipe bender is connected; the bottom of the column 5 is quickly and accurately installed with the trolley 3.

[0039] Illustratively, in step 5, before installing the top of the column 5, temporarily remove the installation bolts 152 and the gaskets 153 on the clamping ring of the upper trolley column 5, open the clamping ring of the column 5 on the upper trolley 1, use a hoisting tool (such as a hand chain block) to pull the top main shaft of the column 5 into the clamping ring of the column 5, close the clamping ring of the column 5, adjust the gap between the main shaft of the column 5 and the clamping ring of the column 5 through the adjusting bolts 154 and the gaskets 153 on the clamping ring of the column 5 to meet the design requirements, ensure that the gap is ≥2mm, install the safety chain later, install other pipelines and accessories, adjust the gear gap of the pipe bender and inject oil into the gear box, and then install the top main shaft of the column 5 with the upper trolley 1.

[0040] Illustratively, in step 5, the surface of the bearing 51 of the universal joint on the column 5 is smeared with molybdenum disulfide grease to ensure good lubrication of the bearing 51 of the universal joint on the column 5.

[0041] In summary, the installation operation of the present application is simple, the lower guide rail assembly 4 is assembled on the drilling floor 10 on site according to the well center reference line on the drilling floor 10, and the upper guide rail assembly 2 is preliminarily positioned, the position of the lower guide rail assembly 4 and the upper guide rail assembly 2 is finely adjusted according to the design requirements, the installation position is ensured to be accurate, and subsequent repeated adjustment is not needed; in the lower guide rail assembly 4, the epoxy pad 46 is welded below the drilling floor 10, the installation form of the traditional epoxy pad 46 welded on the upper surface of the drilling floor 10 is changed, the stress area of the epoxy pad 48 is increased, the overall load capacity of the lower guide rail assembly 4 is improved, the thickness of the epoxy pad 48 becomes continuous and uniform, and the service life of the epoxy pad 48 is also prolonged.

[0042] In the description of the present application, it should be noted that unless specifically stated and limited otherwise, the terms "connected", "connected" should be understood broadly, for example, can be fixedly connected, can also be detachably connected, or integrally connected; can be mechanically connected, can also be electrically connected; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0043] The technical features of the above-described embodiments can be combined arbitrarily, and in order to make the description simple, all possible combinations of each technical feature in the above-described embodiments are not described, however, as long as the combination of these technical features does not exist contradictory, it should be considered as the scope of the present application.

[0044] The above is only the preferred embodiment of the present application, it should be pointed out that for those skilled in the art, without departing from the technical principles of the present application, a number of improvements and replacements can also be made, which should be considered as the protection scope of the present application.

Claims

1. A method of installing a marine tube lance, characterised in that, The method comprises the following steps: Step 1, preliminary positioning of the upper guide rail assembly: the crane hoists the upper guide rail assembly into the derrick, adjusts the position of the upper guide rail assembly so that the first mounting hole of the upper guide rail assembly is aligned with the second mounting hole of the mounting base in the derrick, then lowers the upper guide rail assembly into position, and temporarily connects the first mounting hole of the upper guide rail assembly and the second mounting hole of the mounting base by bolts without tightening the bolts; Step 2, installation of the upper trolley: temporarily remove a section of the upper rack from the upper guide rail assembly, hoist and install the upper trolley to the position in the upper guide rail assembly from which the upper rack is removed, slowly pull the upper trolley to the bow rail locking position of the upper guide rail assembly, so that the upper motor gear of the upper trolley smoothly engages with the upper rack, and reinstall the temporarily removed upper rack on the upper guide rail assembly; Step 3, installation of the lower guide rail assembly: according to the well center reference line of the drilling floor, complete the center line survey of the lower guide rail assembly, complete the assembly of the lower guide rail assembly on the drilling floor, adjust the positions of the upper guide rail assembly and the lower guide rail assembly according to the installation drawings, so that the parallelism and levelness of the upper guide rail assembly relative to the ship's centerline, the parallelism and levelness of the lower guide rail assembly relative to the ship's centerline, and the spacing between the upper guide rail assembly and the lower guide rail assembly are all within the allowable range, then fasten the upper guide rail assembly to the mounting base; according to the installation drawings, weld a backing plate for fixing the lower guide rail assembly in the drilling floor structure, the backing plate is located below the drilling floor, a first threaded hole is formed in the drilling floor, an epoxy pad is cast on the drilling floor, the epoxy pad is located directly above the backing plate, and a second threaded hole is formed in the epoxy pad and communicates with the first threaded hole, the third mounting hole of the lower guide rail assembly, the second threaded hole and the first threaded hole are connected by bolts to fix the lower guide rail assembly on the drilling floor; Step 4, installation of the lower trolley: temporarily remove a section of the lower rack from the lower guide rail assembly, hoist the lower trolley to the position in the lower guide rail assembly from which the lower rack is removed, slowly pull the lower trolley to the bow rail locking position of the lower guide rail assembly, so that the lower motor gear of the lower trolley smoothly engages with the lower rack, the parking position of the lower trolley is directly opposite the parking position of the upper trolley, and the temporarily removed lower rack is reinstalled on the lower guide rail assembly; Step 5, installation of the stand column: install the bottom of the stand column on the lower trolley, and install the top of the stand column on the upper trolley; wherein, before installing the stand column, temporarily remove the upper bearing bush of the universal joint on the lower trolley, apply lubricating grease to the bearing surface of the universal joint on the stand column, rotate the rotating bearing of the lower trolley so that the rotation encoder of the lower trolley faces one side of the lower guide arm on the stand column, then slowly lower the stand column so that the bearing of the universal joint on the stand column falls into the lower bearing bush of the universal joint on the lower trolley, then reinstall the upper bearing bush of the universal joint on the lower trolley, and connect the injection pipeline of the stand column to the oil injection pipeline.

2. The method of installing a marine tube engine of claim 1, wherein, The step 1, two traction ropes are arranged at two ends of the upper guide rail assembly respectively, the crane hoists the upper guide rail assembly through the traction ropes, and when the crane hoists the upper guide rail assembly into the derrick, the upper guide rail assembly is flush with the diagonal line of the derrick, when the upper guide rail assembly approaches the installation base, the traction ropes are slowly pulled to pull the upper guide rail assembly to the installation position, the position is adjusted to align the installation holes of the upper guide rail assembly and the installation base, then the upper guide rail assembly is lowered into position, and the first installation hole of the upper guide rail assembly is temporarily connected with the second installation hole of the installation base through bolts.

3. The method of installing a marine tube engine of claim 1, wherein, The step 1, the upper guide rail assembly is provided with a mounting seat plate, the first installation hole is arranged on the mounting seat plate, the top of the mounting seat plate is provided with an adjusting shaft, the upper guide rail assembly is provided with an adjusting long hole for the adjusting shaft to move along the length direction of the upper guide rail assembly, and the adjusting shaft can be locked on the adjusting long hole.

4. The method of installing a marine tube engine of claim 1, wherein, The step 2, before the upper trolley is installed, the upper guide pulley, the lower guide pulley and the upper motor support pulley inside the upper trolley are temporarily removed, the upper trolley is installed in the upper guide rail assembly at the position where the upper rack is removed, the upper guide pulley and the lower guide pulley are reinstalled to the upper trolley, and the spacing between the upper guide pulley and the lower guide pulley is adjusted to meet the design requirements, and before the eccentric bolt on the upper motor support pulley is installed, lubricating grease is applied on the surface, the upper motor support pulley is reinstalled to the upper trolley, and the spacing between the upper motor support pulley and the upper rack is adjusted through the eccentric bolt to meet the design requirements.

5. The method of installing a marine tube engine of claim 1, wherein, The step 5, before the top of the column is installed, the column clamping ring on the upper trolley is opened, the top spindle of the column is pulled into the column clamping ring by using a lifting sling, the column clamping ring is closed, and the spacing between the spindle of the column and the column clamping ring is adjusted through the adjusting bolt and the gasket on the column clamping ring to meet the design requirements.

6. The method of installing a marine tube machine of claim 1 wherein, The step 5, the bearing surface of the universal joint on the column is coated with molybdenum disulfide grease.

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