Method for mounting and dismounting a lifting unit

Abstract

The present application relates to the ship technology field, specifically disclose a kind of installation and dismounting method of lifting unit, the steps of the installation method include: installation device production, measurement inspection is carried out to upper base shaft sleeve and does pretreatment, lifting unit hoisting, installation tool screw rod, after lifting unit is adjusted to preset position using double-acting hollow oil cylinder, installation is completed with upper base shaft sleeve connection and fixed, lifting unit is installed;The steps of the dismounting method include: dismounting device production, fixed dismounting device, installation double-acting hollow oil cylinder, installation tool conversion assembly, after lifting unit is adjusted to preset position of disengaging upper base shaft sleeve by double-acting hollow oil cylinder through tool conversion assembly, dismounting is completed.The present application uses installation device and dismounting device instead of traditional welding support and removal support mode, not only can avoid upper base coating be damaged, can also reduce labor cost, and the installation and dismounting efficiency of using the present application is higher, installation error is smaller.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of ship technology, in particular to a mounting and dismounting method of lifting unit. BACKGROUND

[0002] At present, offshore wind farm refers to offshore wind power with water depth of about 10 meters, which has the advantages of not occupying land resources, being basically not affected by topography, higher wind speed, more abundant wind energy resources and larger single machine capacity of wind turbine generator. When installing offshore wind turbine generator, an installation platform needs to be built, therefore, offshore wind power installation platform emerges as the times require, for example, the 2000-ton offshore wind power installation platform "Bahe Tan" designed and built for the first time in China, which hoists wind power foundation and wind turbine equipment. The wind power installation platform has 144 lifting units, and the self weight of single equipment is 13T. The installation gap tolerance is small, and the installation period is compact. In the traditional mode, the installation of lifting unit needs to weld support and remove support, which not only increases labor cost, but also damages the upper foundation coating. Therefore, it is necessary to develop a mounting and dismounting method of lifting unit which can overcome the above technical problems. SUMMARY

[0003] The technical problem to be solved by the present application is how to overcome the defects that the installation of lifting unit in the traditional mode needs to weld support and remove support, which not only increases labor cost, but also damages the upper foundation coating.

[0004] In order to solve the above technical problems, the present application provides a mounting and dismounting method of lifting unit, wherein,

[0005] The steps of the mounting method include:

[0006] Mounting device is made;

[0007] The upper foundation shaft sleeve is measured and inspected and pretreated;

[0008] The lifting unit is hoisted to a preset state, and a tool screw rod is installed on the lifting unit;

[0009] The mounting device is fixed on the upper foundation shaft sleeve, a double-acting hollow oil cylinder acting on the tool screw rod is arranged on the mounting device, the lifting unit is adjusted to the preset position of the upper foundation shaft sleeve from bottom to top by the double-acting hollow oil cylinder, and then the lifting unit is connected and fixed with the upper foundation shaft sleeve;

[0010] The steps of the dismounting method include:

[0011] Dismounting device is made;

[0012] The dismounting device is fixed on the upper foundation shaft sleeve, and the double-acting hollow oil cylinder is arranged on the dismounting device;

[0013] The tool conversion assembly controlled by the double-acting hollow oil cylinder is installed on the lifting unit;

[0014] The connecting fixed point between the lifting unit and the upper foundation shaft sleeve is disassembled, so that the lifting unit is in a suspended state, and the double-acting hollow oil cylinder adjusts the lifting unit from top to bottom to a preset position away from the upper foundation shaft sleeve through the tool conversion assembly, and then the disassembly is completed.

[0015] Further preferably, the step of measuring and inspecting the upper foundation shaft sleeve and pretreating it is:

[0016] The multiple machined inner diameters of the upper foundation shaft sleeve are measured and inspected, the coaxiality and the gap tolerance are measured, and the multiple machined inner walls of the upper foundation shaft sleeve are cleaned before the lifting unit is installed.

[0017] Further preferably, the step of hoisting the lifting unit to a preset state and installing a tool screw rod on the lifting unit is:

[0018] The lifting unit is adjusted to a horizontal state by using a special lifting shackle and a hoist, when the roller bearing end of the lifting unit reaches the middle machined inner wall of the upper foundation shaft sleeve from bottom to top, the tool screw rod is installed on the prepared tooth seat at the center of the lifting unit, and the tool screw rod is connected with the double-acting hollow oil cylinder.

[0019] Further preferably, the installation device comprises:

[0020] A first cylinder body, a first installation flange is arranged at the lower end of the first cylinder body, and the first installation flange is used to connect with the upper foundation shaft sleeve;

[0021] A first cover plate is arranged at the upper end of the first cylinder body, and a sleeve is arranged at the middle part of the first cover plate; and

[0022] A first reinforcing support elbow plate is arranged on the inner wall of the first cylinder body and connected with the first cover plate, and the end of the first reinforcing support elbow plate away from the first cylinder body is connected with the outer circumferential surface of the sleeve.

[0023] Further preferably, a first oil cylinder support arc plate is arranged at the upper end of the first cover plate, and a plurality of first support reinforcing rib plates are arranged on the outer circumferential surface of the first oil cylinder support arc plate, and the first support reinforcing rib plates are connected with the first cover plate.

[0024] Further preferably, the width of the first oil cylinder support arc plate is L, and the outer diameter of the first oil cylinder support arc plate is D, wherein L < D.

[0025] Further preferably, a plurality of observation and measurement holes are arranged on the first cover plate.

[0026] Further preferably, the first reinforcing support elbow plate forms a first arc groove at the connection between the first cover plate and the first cylinder.

[0027] Further preferably, the dismounting device comprises:

[0028] A second cylinder, the lower end of which is provided with a second mounting flange for connecting with the upper base shaft sleeve;

[0029] A second cover plate, which is arranged on the upper end of the second cylinder; the upper surface of the second cover plate is provided with a second reinforcing support elbow plate; and

[0030] A second oil cylinder support arc plate, which is arranged on the lower surface of the second cover plate, and a second support reinforcing rib plate is connected between the outer circumferential surface of the second oil cylinder support arc plate and the lower surface of the second cover plate.

[0031] Further preferably, the second reinforcing support elbow plate comprises:

[0032] A longitudinal elbow plate, which is arranged on the upper surface of the second cover plate, and the two ends of the longitudinal elbow plate extend to the edges of the second cover plate along the diameter of the second cover plate; and

[0033] A transverse elbow plate, which is arranged on both sides of the longitudinal elbow plate, and the transverse elbow plate forms a second arc groove at one end thereof close to the longitudinal elbow plate.

[0034] Further preferably, the opposite ends of the circumferential wall of the second cylinder are each provided with a mounting window.

[0035] Further preferably, the included angle θ formed by the mounting window relative to the axis of the second cylinder is not less than 45°.

[0036] The mounting and dismounting method of the lifting unit provided by the present application has the following beneficial effects compared with the prior art:

[0037] Before installation, the upper base shaft sleeve is measured and pretreated to ensure the installation accuracy of the upper base shaft sleeve and the lifting unit, when installing, the lifting unit is hoisted to a preset state, and a tool screw rod is installed on the lifting unit, and the vertical lifting of the lifting unit is realized by the action of the double-acting hollow oil cylinder on the tool screw rod, which can improve the installation efficiency and ensure the accurate adjustment of the lifting unit to the preset position of the upper base shaft sleeve, and reduce the installation error; when disassembling, the disassembling device is fixed on the upper base shaft sleeve, and a tool conversion assembly is installed on the lifting unit, and the downward force of the double-acting hollow oil cylinder is applied to the tool conversion assembly, so that the lifting unit can be adjusted from top to bottom to the preset position of the upper base shaft sleeve, and then the purpose of quick disassembly is achieved, in addition, due to the stroke limitation of the double-acting hollow oil cylinder, in order to meet the disassembly stroke requirement of the lifting unit, the disassembly efficiency can be further improved by replacing the tool conversion assembly and the double-acting hollow oil cylinder; the installation device and the disassembling device of the application replace the traditional welding support and disassembling support mode, which can not only avoid the damage of the upper base coating, but also reduce the labor cost, and the installation and disassembly efficiency of the application is higher, and the installation error is smaller. BRIEF DESCRIPTION OF DRAWINGS

[0038] Figure 1 It is the step diagram of the installation method of the application.

[0039] Figure 2 It is the step diagram of the disassembly method of the application.

[0040] Figure 3 It is the demonstration diagram of the installation method of the application.

[0041] Figure 4 It is the demonstration diagram of the disassembly method of the application.

[0042] Figure 5 It is the top view of the installation device of the application.

[0043] Figure 6 It is the sectional view of A-A section in the application. Figure 5

[0044] Figure 7 It is another structure diagram of the first cover plate of the application.

[0045] Figure 8 It is the structure diagram of the first reinforcing support elbow plate of the application.

[0046] Figure 9 It is the structure diagram of the first oil cylinder support arc plate of the application.

[0047] Figure 10 It is the bottom view of the disassembling device of the application.

[0048] ​Figure 11 is the second cylinder of the application Figure 10 is a sectional view of the B-B section in the application.

[0049] Figure 12 is a structural diagram of the second cylinder of the application.

[0050] Figure 13 is a structural diagram of the longitudinal elbow of the application.

[0051] Figure 14 is a structural diagram of the transverse elbow of the application.

[0052] Figure 15 is an assembly schematic diagram of the tool joint and the adapter of the application.

[0053] Figure 16 is an assembly schematic diagram of the first adapter and the tool joint of the application.

[0054] Figure 17 is an assembly schematic diagram of the second adapter and the tool joint of the application.

[0055] In the figure, 100, upper base shaft sleeve; 110, square sleeve; 120, first circular sleeve; 130, second circular sleeve;

[0056] 200, lifting unit; 210, roller bearing end;

[0057] 300, mounting device; 310, first cylinder; 320, first mounting flange; 330, first cover plate; 331, observation measurement hole; 340, sleeve; 350, first oil cylinder support arc plate; 360, first support reinforcing rib plate; 370, first reinforcing support elbow; 371, first arc groove;

[0058] 400, double-acting hollow oil cylinder;

[0059] 500, tool screw rod;

[0060] 600, dismounting device; 610, second cylinder; 620, second mounting flange; 630, second cover plate; 640, second oil cylinder support arc plate; 650, second support reinforcing rib plate; 660, second reinforcing support elbow; 661, transverse elbow; 6611, second arc groove; 662, longitudinal elbow;

[0061] 700, tool adapter assembly; 710, tool joint; 720, adapter; 721, first adapter; 722, second adapter. DETAILED DESCRIPTION

[0062] The specific embodiments of the present application will be further described in conjunction with the drawings and examples. The following examples are used to illustrate the present application, but not to limit the scope of the present application.

[0063] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "periphery", "inner side", "top", "bottom", "between", "close to", "far away from", "two sides", "transverse", "longitudinal", "vertical", "horizontal" and the like in the present application are 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 of the present application.

[0064] The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance; in addition, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it 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.

[0065] The present application provides a mounting and dismounting method of a lifting unit, which aims to guide the operator to mount the lifting unit 200 on the upper foundation shaft sleeve 100 or dismount the lifting unit 200 from the upper foundation shaft sleeve 100; the mounting and dismounting method of the present application replaces the traditional welding support and dismounting support mode, which not only can avoid the damage of the upper foundation coating, but also can reduce the labor cost, and the mounting and dismounting efficiency of the present application is higher, and the mounting error is smaller.

[0066] It should be noted that, as Figure 3 and 4As shown, the lifting unit 200 has a roller bearing end 210, when installed, the roller bearing end 210 of the lifting unit 200 faces the upper base sleeve 100, and the roller bearing end 210 is provided with roller bearing front and rear cover plates (not shown); the upper base sleeve 100 includes a square sleeve 110, a first circular sleeve 120 and a second circular sleeve 130 from top to bottom, for the convenience of description, the specifications of the square sleeve 110, the first circular sleeve 120 and the second circular sleeve 130 are described, wherein the thickness of the square sleeve 110 is 255mm, the middle machined inner wall is φ1=440mm, the thickness of the first circular sleeve 120 is 70mm, the middle machined inner wall is φ2=925mm, the thickness of the second circular sleeve 130 is 30mm, the middle machined inner wall is φ3=930mm, and the double-acting hollow oil cylinder 400 is DC5-100, the stroke of the oil cylinder of this model is 100mm.

[0067] In the specific example of the present application, as shown in Figure 1 and Figure 3 The present application provides a mounting method of a lifting unit, the steps of which include:

[0068] S11, the mounting device 300 is made;

[0069] S12, the upper base sleeve 100 is measured and pretreated;

[0070] S13, the lifting unit 200 is hoisted to a preset state (i.e. Figure 3 , at this time the roller bearing end of the lifting unit faces directly upward), and the tool screw rod 500 is installed on the lifting unit 200;

[0071] S14, the mounting device 300 is fixed on the upper base sleeve 100, the double-acting hollow oil cylinder 400 acting on the tool screw rod 500 is arranged on the mounting device 300, after the double-acting hollow oil cylinder 400 adjusts the lifting unit 200 to the preset position of the upper base sleeve 100 (i.e. the roller bearing end reaches the machined inner wall of the first circular sleeve) from bottom to top, the lifting unit 200 is connected and fixed with the upper base sleeve 100.

[0072] By adopting the scheme, before installation, the upper base sleeve 100 is measured and pretreated to ensure the installation accuracy of the upper base sleeve 100 and the lifting unit 200, during installation, the lifting unit 200 is hoisted to a preset state, and the tool screw rod 500 is installed on the lifting unit 200, the double-acting hollow oil cylinder 400 acts on the tool screw rod 500 to realize the vertical lifting of the lifting unit 200, which can not only improve the installation efficiency, but also ensure that the lifting unit 200 is accurately adjusted to the preset position of the upper base sleeve 100, and reduces the installation error.

[0073] Further, the step of measuring and pre-treating the upper base shaft sleeve 100 is as follows: measuring and checking the inner diameter dimensions of the upper base shaft sleeve 100, such as the diameters φ1, φ2 and φ3, the coaxial degree and the gap tolerance, and cleaning the machined inner walls of the upper base shaft sleeve 100, such as the square sleeve 110, the first circular sleeve 120 and the second circular sleeve 130, before the installation of the lifting unit 200, so as to ensure the installation accuracy of the upper base shaft sleeve 100 and the lifting unit 200.

[0074] Further, the step of hoisting the lifting unit to a preset state and installing the tool screw on the lifting unit is as follows: adjusting the lifting unit 200 to a horizontal state by using a special lifting hook and a sling, and when the roller bearing end 210 of the lifting unit 200 reaches the machined inner wall of the first circular sleeve 120 from bottom to top, installing the tool screw 500 on the M36*80 tooth seat (the same end as the roller bearing end 210) pre-prepared on the shaft center of the lifting unit 200, locking the nut, and connecting the tool screw 500 with the double-acting hollow oil cylinder 400.

[0075] In some examples of the present application, with reference to Figure 5 and Figure 6 , the mounting device 300 comprises a first cylinder body 310, and a first mounting flange 320 is arranged at the lower end of the first cylinder body 310, which is used for threaded connection with the square sleeve 110, so as to fix the first cylinder body 310 to the upper end of the machined inner wall φ1.

[0076] In order to meet the installation and fixation of the double-acting hollow oil cylinder 400, a first cover plate 330 is arranged at the upper end of the first cylinder body 310, wherein a sleeve 340 is arranged at the middle part of the first cover plate 330, so as to facilitate the connection of the tool screw 500 with the double-acting hollow oil cylinder 400.

[0077] Preferably, as shown in Figure 7 , in the process of installing the lifting unit 200, a plurality of observation and measurement holes 331 can be arranged on the first cover plate 330 for the convenience of observation or measurement.

[0078] Further preferably, since the weight of a single lifting unit 200 is large, the pressure borne by the first cover plate 330 is large in the process that the double-acting hollow oil cylinder 400 acts on the tool screw 500, in order to avoid the deformation of the first cover plate 330 and affect the installation accuracy, a first reinforcing support elbow plate 370 is arranged between the first cylinder body 310 and the first cover plate 330, specifically, the first reinforcing support elbow plate 370 is arranged on the inner wall of the first cylinder body 310 and connected with the first cover plate 330, and the end of the first reinforcing support elbow plate 370 away from the first cylinder body 310 is connected with the outer circumferential surface of the sleeve 340, so as to enhance the bearing capacity of the first cover plate 330.

[0079] In some examples of the present application, as shown in Figure 8 In order to avoid the deformation of the first reinforcing support elbow plate 370 due to stress concentration at the connection between the first cover plate 330 and the first cylinder body 310, a first arc groove 371 is formed at the connection between the first cover plate 330 and the first cylinder body 310, thereby eliminating stress concentration and improving the carrying capacity of the first reinforcing support elbow plate 370.

[0080] In some examples of the present application, as shown in Figure 5 In order to avoid the installation precision being reduced due to the deviation of the double-acting hollow oil cylinder 400 during operation, the double-acting hollow oil cylinder 400 needs to be limited. Specifically, a first oil cylinder support arc plate 350 is arranged at the upper end of the first cover plate 330 to match the outer periphery of the double-acting hollow oil cylinder 400 and to limit the double-acting hollow oil cylinder 400 to meet the requirements of fixed installation. In order to improve the installation strength of the first oil cylinder support arc plate 350, a plurality of (number ≥ 2) first support reinforcing rib plates 360 are arranged on the outer periphery of the first oil cylinder support arc plate 350. The first support reinforcing rib plates 360 are connected with the first cover plate 330, the contact area between the first oil cylinder support arc plate 350 and the first cover plate 330 is increased through the first support reinforcing rib plates 360, the strength of the structure is improved, and the installation precision of the lifting unit 200 is indirectly ensured.

[0081] In other examples of the present application, Figure 9 In order to facilitate the installation of the double-acting hollow oil cylinder 400, the width L of the first oil cylinder support arc plate 350 is smaller than the outer diameter of the first oil cylinder support arc plate 350. This scheme makes it easier for the double-acting hollow oil cylinder 400 to be connected with the first oil cylinder support arc plate 350.

[0082] The present application uses an electric pump to act on the double-acting hollow oil cylinder 400, so that the lifting unit 200 moves from bottom to top to complete the shaft entering, and continuously adjusts the limit through the tool screw rod 500 to meet the requirements of the shaft entering. After the installation is completed, the horizontal state of the lifting unit 200 needs to be checked, and finally the lifting unit 200 is fixedly connected with the upper base shaft sleeve 100 through the front and rear cover plates of the roller bearing.

[0083] In specific examples of the present application, as shown in Figure 2 and Figure 4 The present application provides a disassembly method of the lifting unit, and the steps thereof include:

[0084] S21, disassembly device 600 is made;

[0085] S22, the disassembly device 600 is fixed on the upper base shaft sleeve 100, and the double-acting hollow oil cylinder 400 is arranged on the disassembly device 600;

[0086] S23, installing the tool conversion assembly 700 controlled by the double-acting hollow oil cylinder 400 on the lifting unit 200;

[0087] S24, removing the connection fixed points of the lifting unit 200 and the upper foundation shaft sleeve 100, i.e. the front and rear cover plates of the roller bearing, so that the lifting unit is in a suspended state, and the double-acting hollow oil cylinder 400 adjusts the lifting unit 200 from top to bottom to the preset position of the upper foundation shaft sleeve 100 through the tool conversion assembly 700 to complete the disassembly.

[0088] When disassembling, first fix the disassembly device on the upper foundation shaft sleeve 100, and install the tool conversion assembly 700 on the lifting unit 200, and use the double-acting hollow oil cylinder 400 to exert a downward force on the tool conversion assembly 700, so that the lifting unit 200 can be adjusted from top to bottom to the preset position of the upper foundation shaft sleeve 100, thereby achieving the purpose of quick disassembly. In addition, due to the stroke limitation of the double-acting hollow oil cylinder 400, in order to meet the disassembly stroke requirement of the lifting unit, the disassembly efficiency can be further improved by replacing the tool conversion assembly 700 and the double-acting hollow oil cylinder 400.

[0089] In the specific examples of the present application, as shown in Figure 10 and Figure 11 The disassembly device 600 includes a second cylinder body 610. In order to facilitate the connection of the second cylinder body 610 and the upper foundation shaft sleeve 100, a second mounting flange 620 is arranged at the lower end of the second cylinder body 610, so that the second cylinder body 610 is connected with the upper foundation shaft sleeve 100 through the second mounting flange 620.

[0090] As a preferred example, in order to meet the installation of the double-acting hollow oil cylinder 400, a second cover plate 630 is arranged at the upper end of the second cylinder body 610. Further, due to the large weight of a single lifting unit 200, in order to improve the carrying capacity of the second cover plate 630, a second reinforcing support elbow plate 660 is arranged on the upper surface of the second cover plate 630 to prevent the second cover plate 630 from deforming.

[0091] In some examples of the present application, in order to avoid the deviation of the double-acting hollow oil cylinder 400 during work, which leads to the reduction of installation accuracy, it is necessary to limit the double-acting hollow oil cylinder 400. Specifically, first, a second oil cylinder support arc plate 640 is arranged on the lower surface of the second cover plate 630 and used to limit the double-acting hollow oil cylinder 400 to meet the requirements of fixed installation. Secondly, in order to improve the installation strength of the second oil cylinder support arc plate 640, a second support reinforcing rib plate 650 is connected between the outer circumferential surface of the second oil cylinder support arc plate 640 and the lower surface of the second cover plate 630. The second support reinforcing rib plate 650 is connected with the second cover plate 630, and the structural strength of the second cover plate 630 is improved through the second support reinforcing rib plate 650.

[0092] In some examples of the present application, since the double-acting hollow oil cylinder 400 is installed on the inner side of the second cylinder body 610, in order to facilitate the installation of the double-acting hollow oil cylinder 400, opposite ends of the circumferential wall of the second cylinder body 610 are provided with installation windows, as shown in Figure 12 The included angle θ formed by the installation window relative to the axis of the second cylinder body 610 is not less than 45°, and preferably θ = 50°, so as to facilitate the double-acting hollow oil cylinder 400 to enter the second cylinder body 610 through the installation window.

[0093] In some examples of the present application, referring to Figure 13 and Figure 14 , the second reinforcing support elbow plate 660 includes a longitudinal elbow plate 662 and a transverse elbow plate 661. The longitudinal elbow plate 662 is arranged on the upper surface of the second cover plate 630, and the two ends of the longitudinal elbow plate 662 extend to the edge of the second cover plate 630 along the diameter of the second cover plate 630. The transverse elbow plate 661 is arranged on both sides of the longitudinal elbow plate 662. The transverse elbow plate 661 forms a second arc groove 6611 at one end close to the longitudinal elbow plate 662, so as to avoid stress concentration at the connection between the longitudinal elbow plate 662 and the transverse elbow plate 661, and ensure the overall structural strength of the dismounting device 600.

[0094] In some examples of the present application, as shown in Figure 15 , the tool conversion assembly 700 includes a tool joint 710 and a conversion head 720. The tool joint 710 is controlled by the double-acting hollow oil cylinder 400. Since the stroke of the double-acting hollow oil cylinder 400 is limited, the dismounting of the lifting unit 200 has a stroke of 255 mm, and the gap tolerance is small. Therefore, the conversion is realized through the conversion head 720, such as the first conversion head 721 and the second conversion head 722 in Figure 16 and Figure 17 , to meet the dismounting requirements of the lifting unit 200. The second conversion head 722 is 40-70 mm longer than the first conversion head 721.

[0095] In conclusion, the mounting and dismounting method of the lifting unit provided by the application uses the mounting device 300 and the dismounting device 600 to replace the traditional welding support and dismounting support mode, which can not only avoid the damage of the upper base coating, but also reduce the labor cost, and the mounting and dismounting efficiency of the application is higher, and the mounting error is smaller.

[0096] The above only describes the preferred embodiments of the present application, and it should be pointed out that for ordinary skilled in the art, several improvements and replacements can be made without departing from the technical principles of the present application, and these improvements and replacements should also be considered as the protection scope of the present application. The basic principles, main features and advantages of the present application are shown and described above, and it is obvious for those skilled in the art that the present application is not limited to the details of the above preferred embodiments, the examples should be considered as exemplary and non-limiting, the scope of the present application is defined by the appended claims instead of the above description, and all changes falling within the meaning and scope of the equivalent elements of the claims should be included in the present application.

[0097] In addition, it should be understood that although the present application is described in the embodiments, not every embodiment contains only one independent technical solution, and the description manner of the specification is only for the sake of clarity, and those skilled in the art should consider the specification as a whole, and the technical solutions in the embodiments can also be properly combined to form other embodiments which can be understood by those skilled in the art.

Claims

1. A method for mounting and dismounting a lifting unit, characterized in that: the steps of the mounting method comprise: mounting device manufacturing; measuring and checking the upper base shaft sleeve and making pretreatment; hoisting the lifting unit to a preset state and installing a tool screw rod on the lifting unit; fixing the mounting device on the upper base shaft sleeve, setting a double-acting hollow oil cylinder on the mounting device for acting on the tool screw rod, adjusting the lifting unit from bottom to top to a preset position of the upper base shaft sleeve by the double-acting hollow oil cylinder, and then connecting and fixing the lifting unit with the upper base shaft sleeve; wherein the mounting device comprises: a first cylinder body, a first installation flange being arranged at the lower end of the first cylinder body and used for connecting with the upper base shaft sleeve; a first cover plate being arranged at the upper end of the first cylinder body, a sleeve being arranged at the middle part of the first cover plate; and a first reinforcing support elbow plate being arranged on the inner wall of the first cylinder body and connected with the first cover plate, the end of the first reinforcing support elbow plate away from the first cylinder body being connected with the outer peripheral surface of the sleeve; the steps of the dismounting method comprise: dismounting device manufacturing; fixing the dismounting device on the upper base shaft sleeve and setting the double-acting hollow oil cylinder on the dismounting device; installing a tool conversion assembly controlled by the double-acting hollow oil cylinder on the lifting unit; removing the connection and fixing points of the lifting unit with the upper base shaft sleeve so that the lifting unit is in a suspended state, and then completing the dismounting after the double-acting hollow oil cylinder adjusts the lifting unit from top to bottom to a preset position of disengaging the upper base shaft sleeve through the tool conversion assembly; wherein the dismounting device comprises: a second cylinder body, a second installation flange being arranged at the lower end of the second cylinder body and used for connecting with the upper base shaft sleeve; a second cover plate being arranged at the upper end of the second cylinder body, a second reinforcing support elbow plate being arranged on the upper surface of the second cover plate; and a second oil cylinder support arc plate being arranged on the lower surface of the second cover plate, and a second support reinforcing rib plate being connected between the outer peripheral surface of the second oil cylinder support arc plate and the lower surface of the second cover plate; the step of measuring and checking the upper base shaft sleeve and making pretreatment comprises: measuring and checking the multiple machining inner diameter sizes of the upper base shaft sleeve, measuring the coaxiality and gap tolerance, and cleaning the multiple machining inner walls of the upper base shaft sleeve before mounting the lifting unit; the step of hoisting the lifting unit to a preset state and installing a tool screw rod on the lifting unit comprises: adjusting the lifting unit to a horizontal state by using a special lifting shackle and a hoist, installing the tool screw rod on a prepared tooth seat of the shaft center of the lifting unit when the roller bearing end of the lifting unit reaches the machining inner wall in the middle of the upper base shaft sleeve from bottom to top, and connecting the tool screw rod with the double-acting hollow oil cylinder; the upper end of the first cover plate is provided with a first oil cylinder support arc plate, the outer peripheral surface of the first oil cylinder support arc plate is provided with a plurality of first support reinforcing rib plates, and the first support reinforcing rib plates are connected with the first cover plate. ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ 2. The method of claim 1, wherein ​ ​ 3. The method of claim 1, wherein, ​ ​ 4. The method of claim 1, wherein, ​ 5. The method of claim 4, wherein, The first oil cylinder support arc plate has a width of L and an outer diameter of D, wherein L < D.

6. The method of claim 1, wherein, A plurality of observation measurement holes are formed in the first cover plate.

7. The method of claim 1, wherein, The first reinforcing support elbow plate forms a first arc groove at the connection between the first cover plate and the first cylinder body.

8. The method of claim 1, wherein, The second reinforcing support elbow plate comprises: a longitudinal elbow plate arranged on the upper surface of the second cover plate, two ends of the longitudinal elbow plate extending to the edges of the second cover plate along the diameter of the second cover plate; and a transverse elbow plate arranged on both sides of the longitudinal elbow plate, the transverse elbow plate forming a second arc groove at one end thereof close to the longitudinal elbow plate.

9. The method of claim 1, wherein, Opposite ends of the circumferential wall of the second cylinder body are provided with mounting windows.

10. The method of claim 9, wherein, The included angle θ formed by the mounting windows relative to the axis of the second cylinder body is not less than 45°.

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