Large equipment lifting mechanism

Abstract

The utility model belongs to the technical field of large-scale equipment transportation, and relates to a large-scale equipment lifting mechanism, which comprises at least two layers of square steel pipe stacking layers staggered and stacked to form a square steel pipe stack, wherein the square steel pipe stacking layer comprises an outer square steel pipe and an inner square steel pipe; a lifting box is provided on the upper surface of the square steel pipe stack, wherein a plurality of telescopic push rods are arranged in the lifting box, and a supporting plate is connected under the plurality of telescopic push rods; the number of layers of the square steel pipe stacking layer and the height of the square steel pipe stack are adjusted by the alternating lifting and lowering movement of the lifting box and the supporting plate in coordination with the alternating increase and decrease of the outer square steel pipe and the inner square steel pipe, so as to adjust the height position of the lifting box. The parallel connection of a plurality of telescopic push rods, the parallel connection of a plurality of lifting boxes, and the use of a square steel pipe stack to replace the sleeper stack in the prior art enhance the ultimate load capacity of the lifting mechanism and expand the application scope of the lifting mechanism. The application of the lifting mechanism can reduce the labor intensity of the operators, improve the working efficiency, save costs, and be safe and reliable.

Description

Technical Field

[0001] The utility model belongs to the technical field of large equipment transportation, and specifically relates to a large equipment lifting mechanism. Background Art

[0002] The power industry, chemical industry, construction industry and other fields often involve the loading, transportation and installation of large equipment, such as large transformers, large tanks and other equipment. The weight of such large equipment is generally greater than 100 tons, the length is generally greater than 6m, and the diameter or width is generally greater than 3m. Due to the large size and weight of such equipment, the transportation and installation of the equipment may exceed the capacity of the lifting equipment at the shipping and installation site. At this time, the shipping, unloading or installation of large equipment requires the temporary installation of lifting machinery such as truck cranes, crawler cranes, simple gantry cranes, or the installation of manual lifting mechanisms. Due to the size of the site, the lifting capacity of the temporary crane, and the economy, some sites cannot use cranes on site, and only manual lifting mechanisms can be used to move large equipment.

[0003] At present, the lifting mechanism is as follows Figure 1-2 As shown, it mainly includes a single jack 11, a steel pier 12 padded at the bottom of the jack 11, and a pad 13 in contact with the ground. The jacking mechanism is generally provided with at least 4 groups and each is distributed at the four corners of the lower surface of the large equipment 10. A pile of sleepers 14 is also provided between the jacking mechanisms to cooperate with the jacking and heightening operation and to play a protective role. The specifications and quantity of the pile of sleepers 14 must meet the requirements of independently supporting the large equipment 10 to ensure the safety of the jacking operation. Before jacking, the jack 11 and the pile of sleepers 14 are usually arranged one by one adjacent to each other. During the lifting operation, the telescopic rod on the jack 11 extends upward and lifts the large equipment, and the large equipment is separated from the original supporting structures such as the bracket, the base, and the car plate. The gap between the pile of sleepers 14 and the bottom of the large equipment increases, and sleepers are continued to be erected on the original pile of sleepers 14 to increase the total height of the pile of sleepers 14 so that the pile of sleepers 14 maintains a small gap with the large equipment; the lifting stroke of the common jack 11 is generally 10 to 20 cm. If the height of the large equipment 10 that needs to be lifted exceeds the lifting stroke of the jack 11 When the telescopic rod of the jack 11 reaches the maximum stroke, the telescopic rod of the jack 11 shrinks to the shortest position and disengages from the lower surface of the large equipment 10. It is necessary to manually add a steel pier 12 between the jack 11 and the pad 13 of the jacking mechanism to increase the position height of the jack, so that the telescopic rod on the jack 11 in a contracted state approaches the lower surface of the large equipment 10 again. During the process of the telescopic rod of the jack 11 disengaging from the lower surface of the large equipment 10, the entire large device 10 is supported by multiple piles of sleepers 14. By alternately raising and lowering the height of the jacking surface on the jack 11, the jack 11 and the pile of sleepers 14 alternately support the large equipment, thereby allowing the large equipment to rise or fall to a predetermined height.

[0004] Although the above-mentioned lifting mechanism can complete the lifting operation of the large equipment 10, it has many disadvantages, and the specific disadvantages are as follows:

[0005] (1) There are many supporting points and the floor space is large. The requirements for the supporting position of the large equipment 10 and the ground surface of the erection site are high. During the jacking operation, the operator also needs to go to different supporting points to adjust the height of the steel pier 12 and the sleeper pile 14 under the jack 11, which requires a lot of work;

[0006] (2) When the steel pier 12 is added between the jack 11 and the pad 13, the jack 11 needs to be repeatedly moved and the oil pipe needs to be disassembled and assembled, which is labor-intensive and dangerous as the assembly height of the jack 11 increases;

[0007] (3) When the telescopic rod of the jack 11 on the lifting mechanism lifts the large equipment 10 upward, each corner of the large equipment 10 is supported by only a single jack 11 on the lifting mechanism, and the supporting surface is small and the stability is insufficient; at this time, the pile of sleepers 14 is spaced apart from the lower surface of the large equipment 10 and does not support the large equipment 10;

[0008] (4) The load range of a single jack 11 is generally 50 to 500 tons. A jack weighing more than 200 tons has a deadweight of more than 100 kg, which makes it difficult to move manually. A jack weighing more than 300 tons has a high cost, which limits the scope of manual lifting operations.

[0009] (5) The lifting mechanism and the sleeper pile 14 are often made of wood, which includes pine, fir and other wood. Since some large equipment 10 can reach 1,000 tons or even heavier, the strength of the above-mentioned commonly used wood cannot meet the load-bearing requirements, and it is necessary to use harder wood such as red ironwood, but this type of wood is expensive.

[0010] (6) The texture and strength of the wood are uneven, which poses a safety hazard to the lifting operation;

[0011] (7) After the wood is purchased, it needs to go through multiple processing steps before it can be used. Not only is the process cumbersome, but the wood also has high requirements for the storage environment, is easily damaged, and has a higher preservation cost. Utility Model Content

[0012] The technical problems to be solved by the utility model are: to provide a large equipment lifting mechanism, to use multiple jacks in parallel, to expand the lifting support area, and to solve the problem of excessively concentrated force on a single jack; to use square steel pipe piles instead of sleeper piles, to solve the contradiction between the top concentrated load and the bottom dispersed load / limited ground load in the lifting operation, to achieve the integration of the lifting structure and the support cushion protection structure, and to achieve the strength upgrade of the support cushion material; to design a special parallel interface for the lifting device, to create conditions for expanding the application scope (load-bearing tonnage) of the manual assisted lifting operation mode; at the same time, the square steel pipes with uniform specifications create conditions for subsequent automation transformation. Reduce the labor intensity of operators, simple structure, save costs, safe and reliable.

[0013] The utility model solves the technical problem by adopting the following technical solution: a large equipment lifting mechanism comprises at least two layers of square steel pipe stacking layers, at least two layers of the square steel pipe stacking layers are staggered and stacked to form a square steel pipe stack; the projected outer contour of the upper square steel pipe stacking layer on the horizontal plane is less than or equal to the projected outer contour of the lower square steel pipe stacking layer on the horizontal plane; the square steel pipe stacking layer comprises an outer square steel pipe and an inner square steel pipe; the outer square steel pipe and the inner square steel pipe on the same square steel pipe stacking layer are arranged horizontally in the same direction; adjacent square steel pipe stacking layers are arranged vertically and crosswise;

[0014] A lifting box is provided on the upper surface of the square steel pipe stack, and a plurality of telescopic push rods are provided in the lifting box, and the plurality of telescopic push rods are evenly distributed in the lifting box along the horizontal direction; the plurality of telescopic push rods are evenly distributed in the lifting box along the horizontal direction; the lower ends of the plurality of telescopic push rods are provided with the same support plate, and the same support plate is fixedly installed on the bottom surfaces of the plurality of telescopic push rods by lower bolts; the telescopic push rod can drive the support plate to penetrate the lower surface of the lifting box for telescopic reciprocating movement up and down;

[0015] When the support plate protrudes downward from the lower surface of the lifting box and is located at the lower limit position, the support plate abuts against the inner square steel pipe of the original top square steel pipe stacking layer, and the outer square steel pipe arranged at an interval above and below the lifting box is provided between the lifting box and the original top square steel pipe stacking layer;

[0016] When the support plate is retracted to above the lower surface of the lifting box, the lifting box abuts against the upper surface of the outer square steel pipe above the original top square steel pipe stacking layer, the inner square steel pipe is arranged between the support plate and the original top square steel pipe stacking layer, and the support plate and the inner square steel pipe above the original top square steel pipe stacking layer are arranged at intervals up and down;

[0017] The outer square steel tube and the inner square steel tube above the original top square steel tube stacking layer cooperate to form a new top square steel tube stacking layer; the outer square steel tube is used to abut the lower surface of the jacking box, and the inner square steel tube is used to abut the lower surface of the support plate.

[0018] Furthermore, the outer square steel tubes and the inner square steel tubes on the same square steel tube stacking layer have the same specifications.

[0019] Furthermore, the outer surfaces of the outer square steel tube and the inner square steel tube are both provided with a matte anti-rust paint layer.

[0020] Furthermore, the horizontal cross-section of the square steel pipe stack is a square structure, and the cross-section of the square steel pipe stack perpendicular to the horizontal direction is a stepped structure that is narrow at the top and wide at the bottom and is arranged symmetrically on the left and right.

[0021] Furthermore, the telescopic push rod is a hydraulic push rod; it also includes a hydraulic station, which is connected to the hydraulic push rod through a hydraulic oil inlet pipe and a hydraulic oil outlet pipe respectively to form a hydraulic circuit.

[0022] Furthermore, the oil inlets of the plurality of hydraulic push rods are connected in parallel to the same hydraulic oil inlet pipe, and the oil outlets of the plurality of hydraulic push rods are connected in parallel to the same hydraulic oil outlet pipe.

[0023] Furthermore, a dedicated parallel interface is provided on the jacking box, and the same hydraulic station can connect multiple hydraulic push rods in different jacking boxes in parallel through the dedicated parallel interface.

[0024] Compared with the prior art, the beneficial effects of the utility model are as follows: providing a large equipment jacking mechanism, utilizing the alternating lifting and lowering movement of the jacking box and the telescopic push rod in conjunction with the alternating increase and decrease of the outer square steel pipe and the inner square steel pipe to adjust the number of square steel pipe stacking layers and the height of the square steel pipe stack, thereby realizing the adjustment of the height position of the jacking box, reducing the labor intensity of the operators, having a simple structure, and being safe and reliable; by providing the jacking box to form a surface support for the large equipment, the support stability of a single jacking mechanism is improved, no other auxiliary support structures are required, the support points are reduced, the structure is simplified, the floor space is reduced, and the large equipment is reduced. The ground construction workload before the arrival of the equipment can be reduced, reducing the workload of operators who have to repeatedly add sleepers and steel piers during the jacking process; by setting up multiple telescopic push rods, the support stability of the jacking box can be improved, and by using multiple telescopic push rods with smaller load-bearing limits to replace a hydraulic push rod with a larger load-bearing limit, the height of the jacking box can be reduced and the cost can be saved; square steel pipe piles are used to replace the sleeper piles and the steel piers at the bottom of the jack in the prior art, combining the functions of these two devices in the prior art into one, and utilizing the lateral compressive and bending strength of the square steel pipes to obtain stronger support and load-sharing strength under the premise of equal weight. The texture and strength of steel pipes are more uniform, and they are easier to store and process than wood, saving material costs, processing costs and storage costs. The specifications of square steel pipes can be selected according to usage requirements, such as selecting the length of the bottom square steel pipe according to the need for load sharing, selecting the height of the square steel pipe according to the height of each lift, and selecting the wall thickness of the square steel pipe and the number of each layer according to the lifting weight. In short, the adjustment of the height, length and number of layers of square steel pipes is more flexible than wood, which expands the application scope of the jacking device. Steel pipes are recyclable materials and are more environmentally friendly than wood. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the use structure of the jacking mechanism in the background technology of the utility model in the main viewing direction;

[0026] Figure 2 yes Figure 1 Schematic diagram of the left view structure;

[0027] Figure 3 It is a structural schematic diagram of the utility model;

[0028] Figure 4 This is a schematic diagram of the use structure of the utility model in the main viewing direction;

[0029] Figure 5 yes Figure 4 Schematic diagram of the left view structure;

[0030] Figure 6 It is a schematic diagram of a lifting process flow using the lifting device of the utility model;

[0031] Figure numerals: 10-large equipment; 11-jack; 12-steel pier; 13-pad; 14-sleeper pile; 3-square steel pipe stacking layer; 31-outer square steel pipe; 32-inner square steel pipe; 41-lifting box; 42-telescopic push rod; 43-support plate; 45-hydraulic oil inlet pipe; 46-hydraulic oil outlet pipe; 47-lower bolt; 48-upper bolt; 5-hydraulic station. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with the accompanying drawings and embodiments. The large device 10 described in the present application has a flat bottom surface or a base for supporting the large device 10 .

[0033] As attached Figure 3-6 As shown, a large equipment lifting mechanism comprises at least two layers of square steel pipe stacking layers 3, at least two layers of the square steel pipe stacking layers 3 are staggered and stacked to form a square steel pipe stack; the projected outer contour of the upper square steel pipe stacking layer 3 on the horizontal plane is less than or equal to the projected outer contour of the lower square steel pipe stacking layer 3 on the horizontal plane; the square steel pipe stacking layer 3 comprises an outer square steel pipe 31 and an inner square steel pipe 32; the outer square steel pipe 31 and the inner square steel pipe 32 on the same square steel pipe stacking layer 3 are arranged horizontally in the same direction; adjacent square steel pipes The pipe stacking layers 3 are arranged vertically and crosswise; a lifting box 41 is provided on the upper surface of the square steel pipe stack, and a plurality of telescopic push rods 42 are provided in the lifting box 41, and the plurality of telescopic push rods 42 are evenly distributed in the lifting box 41 along the horizontal direction; the lower ends of the plurality of telescopic push rods 42 are provided with the same support plate 43, and the same support plate 43 is fixedly installed on the bottom surface of the plurality of telescopic push rods 42 by lower bolts 47; the telescopic push rod 42 can drive the support plate 43 to penetrate the lower surface of the lifting box 41 and extend up and down. The supporting plate 43 protrudes downward from the lower surface of the lifting box 41 and is located at the lower limit position, the supporting plate 43 abuts against the inner square steel tube 32 of the original top layer of square steel tube stacking layer 3, and the outer square steel tube 31 arranged at an interval above the lifting box 41 is provided between the lifting box 41 and the original top layer of square steel tube stacking layer 3; when the supporting plate 43 retracts to above the lower surface of the lifting box 41, the lifting box 41 abuts against the outer square steel tube 32 above the original top layer of square steel tube stacking layer 3. The inner square steel tube 32 is arranged between the supporting abutment plate 43 and the original top square steel tube stacking layer 3, and the lifting box 41 and the inner square steel tube 32 above the original top square steel tube stacking layer 3 are arranged at intervals up and down; the outer square steel tube 31 and the inner square steel tube 32 above the original top square steel tube stacking layer 3 cooperate to form a new top square steel tube stacking layer 3; the outer square steel tube 31 is used to abut the lower surface of the lifting box 41, and the inner square steel tube 32 is used to abut the lower surface of the supporting abutment plate 43.

[0034] The “staggered stacking of square steel tube stacking layers 3” and “vertical cross arrangement of adjacent square steel tube stacking layers 3” refer to the vertical cross arrangement of outer square steel tubes 31 on adjacent square steel tube stacking layers 3 and the vertical cross arrangement of inner square steel tubes 32 on adjacent square steel tube stacking layers 3. The new top square steel tube stacking layer 3 refers to the top square steel tube stacking layer 3 of the current square steel tube stack, and the original top square steel tube stacking layer 3 refers to the square steel tube stacking layer 3 adjacent to the new top square steel tube stacking layer 3.

[0035] The outer square steel pipe 31 above the original top square steel pipe stacking layer 3 is used to abut against the lower surface of the lifting box 41, so that the support plate 43 retracts upward into the lifting box 41, and there is a gap between the lifting box 41 and the original top square steel pipe stacking layer 3; the inner square steel pipe 32 above the original top square steel pipe stacking layer 3 is used to abut against the bottom of the support plate 43, so that the lifting box 41 is lifted with the support plate 43. The number of layers of the square steel pipe stacking layer 3 is adjusted by increasing or decreasing the outer square steel pipe 31 and the inner square steel pipe 32, thereby achieving the increase or decrease of the height of the square steel pipe stack. The top surface area of ​​the square steel pipe stack should be larger than the lower surface area of ​​the lifting box 41 and the support plate 43. The lifting box 41 is used to install and accommodate multiple telescopic push rods 42. The lifting box 41 directly supports the large equipment 10 and drives the large equipment 10 to rise and fall synchronously, and its upper surface always abuts against the lower surface of the large equipment 10. The telescopic push rod 42 is used to drive the support plate 43 to move up and down synchronously, so that the support plate 43 extends downward to contact the square steel pipe pile to lift the lifting box 41, and the support plate 43 distributes the load of the telescopic push rod 42 more evenly on the square steel pipe pile. The bottom surface of the lower bolt 47 should be higher than the height of the support plate 43 to facilitate the disassembly and maintenance of the support plate 43. The height position of the large equipment 10 is mainly determined by the height of the square steel pipe pile and the height of the lifting box 41. When in use, when the supporting plate 43 protrudes downward from the lower surface of the jacking box 41, an outer square steel pipe 31 is placed between the jacking box 41 and the original top square steel pipe stacking layer 3; when the supporting plate 43 retracts upward to above the lower surface of the jacking box 41, an inner square steel pipe 32 is placed between the supporting plate 43 and the original top square steel pipe stacking layer 3; by adding outer square steel pipes 31 and inner square steel pipes 32, the number of square steel pipe stacking layers 3 and the height of the square steel pipe stack are increased. While the square steel pipe stack continues to increase, the jacking box 41 and the telescopic push rod 42 alternately rise on the square steel pipe stack to continuously increase the position height of the jacking box 41 until the jacking box 41 lifts the large equipment 10 to a specified height.

[0036] The jacking mechanism of the utility model utilizes the alternating lifting and lowering movement of the jacking box 41 and the supporting plate 43 in coordination with the alternating increase and decrease of the outer square steel pipe 31 and the inner square steel pipe 32 to adjust the number of layers 3 of the square steel pipe stacking layer and the height of the square steel pipe stack, thereby realizing the adjustment of the height position of the jacking box 41, and the height position adjustment can be completed without manual frequent assembly and disassembly of the jacking box 41, the telescopic push rod 42 and the supporting plate 43, thereby reducing the labor intensity of the operators, and the structure is simple, safe and reliable; by providing the jacking box 41 to form a surface support for the large equipment 10, the support stability of a single jacking mechanism is improved, and no other auxiliary support structure is required, thereby reducing the support points and simplifying the structure , reducing the floor space occupied, reducing the amount of ground construction before the arrival of large equipment, and reducing the workload of operators in repeatedly adding sleepers and steel piers during the jacking process; by setting up multiple telescopic push rods 42 and supporting plates 43, the jacking support area is expanded, and by using multiple telescopic push rods 42 with smaller load-bearing limits to replace a telescopic push rod 42 with a larger load-bearing limit, the height of the jacking box can be reduced and costs can be saved; square steel pipe piles are used to replace the sleeper piles and the steel piers at the bottom of the jack in the prior art, and the functions of these two devices in the prior art are combined into one, and the side compression and bending strength of the square steel pipes are used to obtain stronger support and load-sharing strength under the premise of equal weight. The texture and strength of steel pipes are more uniform, and they are easier to store and process than wood, saving material costs, processing costs and storage costs. Square steel pipes do not need to distinguish the direction of use during use, which improves the efficiency of square steel pipe stack erection. The specifications of square steel pipes can be selected according to usage requirements, such as selecting the length of the bottom square steel pipe according to the need for load sharing, selecting the height of the square steel pipe according to the height of each lift, and selecting the wall thickness of the square steel pipe and the number of each layer according to the jacking weight. In short, the adjustment of the height, length and number of layers of square steel pipes is more flexible than wood, which expands the scope of application of the jacking device. Steel pipes are recyclable materials and are more environmentally friendly than wood.

[0037] A plurality of outer square steel pipes 31 and inner square steel pipes 32 are generally arranged on the same square steel pipe stacking layer 3. The square steel pipes on the same square steel pipe stacking layer 3 can be fully laid and arranged adjacently, or can be arranged at intervals, and their number can be flexibly adjusted according to the load of the jacking mechanism. The cross-section, length, and wall thickness of the outer square steel pipe 31 and the inner square steel pipe 32 can be the same or different. Preferably, the outer square steel pipe 31 and the inner square steel pipe 32 on the same square steel pipe stacking layer 3 have the same specifications. The same specifications refer to the same shape, size, and material of the steel pipes. There is no need to distinguish between the two during the operation, which is convenient for the operator to operate and improves the efficiency of the jacking operation. Preferably, a matte anti-rust paint layer is provided on the outer surfaces of the outer square steel pipe 31 and the inner square steel pipe 32. The matte anti-rust paint layer can prevent the steel pipes from rusting, increase the friction between the square steel pipes, and improve the stability of the square steel pipe stack.

[0038] The square steel pipe stack can be a square platform structure, a square column structure, a boss structure or other columnar structures, which can be solid or hollow. Preferably, the horizontal cross-section of the square steel pipe stack is a square structure, and the cross-section of the square steel pipe stack perpendicular to the horizontal direction is a stepped structure that is narrow at the top and wide at the bottom and arranged symmetrically on the left and right, so as to ensure that the square steel pipe stack is stressed in the middle, increase the support area of ​​the square steel pipe stack, and improve the overall stability of the jacking mechanism. The surface area of ​​the lower square steel pipe stacking layer 3 can be increased by increasing the length of the lower square steel pipe, so that the load on the square steel pipe stack is distributed to the ground.

[0039] The lifting box 41 can be a box structure with an open or sealed upper end, and its cross-sectional outer contour can be a square, a rectangle or other similar shaped structures. The shape and size of the upper surface of the lifting box 41 are adapted to the shape of the lower surface of the large equipment 10, that is, there is no gap between the upper surface of the lifting box 41 and the lower surface of the large equipment 10 when in use. In order to increase the pressure area of ​​the lifting box 41, preferably, the lifting box 41 is a box structure with a sealed upper surface. The telescopic push rod 42 can be positioned in the lifting box 41 by means of connectors such as locating pins and bolts. Preferably, the telescopic push rod 42 is fixedly installed in the lifting box 41 by an upper bolt 48, and the top surface of the upper screw 48 is located below the top surface of the lifting box 41, so as to facilitate the flexible adjustment of the number of telescopic push rods 42 in the lifting box 41.

[0040] Preferably, the telescopic push rod 42 is a hydraulic push rod; it also includes a hydraulic station 5, which is connected to the hydraulic push rod through a hydraulic oil inlet pipe 45 and a hydraulic oil outlet pipe 46 to form a hydraulic circuit. The hydraulic push rod has a large output force and stable operation, and is more suitable for supporting and lifting large-tonnage large equipment 10. The hydraulic oil in the hydraulic station 5 enters the hydraulic push rod through the hydraulic oil inlet pipe 45 to provide power for it, and the hydraulic oil in the hydraulic push rod flows back to the hydraulic station through the hydraulic oil outlet pipe 46. As a further preference, the oil inlets of the multiple hydraulic push rods are connected in parallel to the same hydraulic oil inlet pipe 45, and the oil outlets of the multiple hydraulic push rods are connected in parallel to the same hydraulic oil outlet pipe 46, so as to ensure that the multiple hydraulic push rods are raised and lowered synchronously and improve the lifting stability of the lifting box 41.

[0041] One or more jacking boxes 41 may be provided. Preferably, the jacking box 41 is provided with a dedicated parallel interface, and the same hydraulic station 5 can connect multiple hydraulic push rods in different jacking boxes 41 in parallel through the dedicated parallel interface, so as to facilitate the parallel use of multiple jacking boxes 41, improve the jacking load capacity of the jacking mechanism, and expand the scope of use.

[0042] A large equipment lifting method, using any of the above large equipment lifting mechanisms, the method comprises the following steps:

[0043] S1, estimating the number of the required lifting mechanisms and determining the installation positions of the lifting mechanisms according to the total weight and volume of the large equipment 10, and presetting the initial height of the square steel pipe stack according to the existing height of the bottom surface of the large equipment 10 from the ground;

[0044] Placing multiple groups of the lifting mechanisms under the large equipment 10;

[0045] S2, the telescopic push rod 42 drives the supporting plate 43 to lift the lifting box 41 upward so that there is a gap between the lifting box 41 and the N-th layer of the square steel pipe stacking layer 3, and the upper surface of the lifting box 41 abuts against the large equipment 10; the lower surface of the supporting plate 43 protrudes from the lifting box 41 and abuts against the upper surface of the N-th layer of the square steel pipe stacking layer 3;

[0046] The Nth layer is the original top square steel pipe stacking layer 3; N is a positive integer greater than or equal to 1;

[0047] S3, adding the outer square steel pipe 31 in the gap between the lower surface of the lifting box 41 in step S2 and the Nth layer of the square steel pipe stacking layer 3;

[0048] S4, the telescopic push rod 42 drives the support plate 43 to retract and the lifting box 41 is lowered until the lower surface of the lifting box 41 abuts against the upper surface of the outer square steel pipe 31 added in step S3; the telescopic push rod 42 drives the support plate 43 to continue to retract upward into the lifting box 41 so that there is a gap between the lifting box 41 and the Nth layer of the square steel pipe stacking layer 3;

[0049] S5, in step S4, the inner square steel tube 32 is added in the gap between the supporting plate 43 and the Nth layer of the square steel tube stacking layer 3, at this time, the outer square steel tube 31 and the inner square steel tube 32 constitute the N+1th layer of the square steel tube stacking layer 3, and the supporting plate 43 and the lifting box 41 are both located on the N+1th layer of the square steel tube stacking layer 3;

[0050] S6. Repeat steps S2 to S5, and use the square steel pipe stacking layer 3 of the N+1th layer in step S5 as the square steel pipe stacking layer 3 of the Nth layer in step S2, until the lifting box 41 lifts the large equipment 10 to a specified height.

[0051] The jacking method of large-scale equipment in the utility model flexibly adjusts the height of the square steel pipe pile and the jacking box 41 by increasing or decreasing the outer square steel pipe 31 and the inner square steel pipe 32 according to the actual situation in cooperation with the telescopic movement of the telescopic push rod 42, which is convenient and fast, easy to operate, reduces the workload of operators, and improves work efficiency. Considering the problems of hoisting, jacking and handling of large-scale equipment 10, during the production, transportation and assembly process, the large-scale equipment 10 is always arranged with a gap between the ground or the table, so the jacking mechanism can be directly placed in the gap between the large-scale equipment 10 and the ground in step S1. The total load capacity of multiple groups of jacking mechanisms should be greater than the weight of the large-scale equipment 10. To ensure safety, the total load capacity of multiple groups of jacking mechanisms is generally 1.5 to 2 times the gravity of the large-scale equipment 10. The "initial height" in step S1 refers to: the jacking box 41 and the telescopic push rod 42 are located on the square steel pipe pile, and the jacking box 41 is lifted by the telescopic push rod 42 to make the jacking box 41 abut against the large-scale equipment 10 in the initial state. The N+1th layer of square steel pipe stacking layer 3 and the Nth layer of square steel pipe stacking layer 3 are arranged adjacent to each other up and down. It should be noted that if the lifting box 41 and the telescopic push rod 42 are directly set on the ground, the height of the lifting mechanism can meet the initial height requirement, and the Nth layer of square steel pipe stacking layer 3 in steps S2 to S5 is the ground. In step S2, the gap between the lifting box 41 and the Nth layer of square steel pipe stacking layer 3 is greater than the height of the outer square steel pipe 31, and in step S4, the gap between the lower surface of the lifting box 41 corresponding to the telescopic push rod 42 and the Nth layer of square steel pipe stacking layer 3 is greater than the height of the inner square steel pipe 32, so that the operator can easily add the outer square steel pipe 31 and the inner square steel pipe 32. The height of the outer square steel pipe 31 and the inner square steel pipe 32 refers to the thickness of the two in the up and down direction when in use. The above method is only a method for lifting large equipment 10 using the equipment in the utility model. The method for lowering the height of large equipment 10 is the same in principle and the operation is opposite.

[0052] In the description of the present invention, the terms "upper", "lower", "bottom", "top", "front", "back", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the figures, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, the terms describing the positional relationships in the figures are only used for illustrative purposes and cannot be construed as limitations on the present invention. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

Claims

1. A large equipment lifting mechanism, characterized in that: The invention comprises at least two layers of square steel tube stacking layers (3), wherein at least two layers of the square steel tube stacking layers (3) are staggered and stacked to form a square steel tube stack; the projected outer contour of the upper square steel tube stacking layer (3) on a horizontal plane is less than or equal to the projected outer contour of the lower square steel tube stacking layer (3) on a horizontal plane; the square steel tube stacking layer (3) comprises an outer square steel tube (31) and an inner square steel tube (32); the outer square steel tube (31) and the inner square steel tube (32) on the same square steel tube stacking layer (3) are arranged horizontally in the same direction; and adjacent square steel tube stacking layers (3) are arranged vertically and crosswise; A lifting box (41) is provided on the upper surface of the square steel pipe stack, and a plurality of telescopic push rods (42) are provided in the lifting box (41), and the plurality of telescopic push rods (42) are evenly distributed in the lifting box (41) along the horizontal direction; the lower ends of the plurality of telescopic push rods (42) are provided with a same support plate (43), and the same support plate (43) is fixedly installed on the bottom surfaces of the plurality of telescopic push rods (42) by lower bolts (47); the telescopic push rod (42) can drive the support plate (43) to penetrate the lower surface of the lifting box (41) and perform telescopic reciprocating motion up and down; When the supporting plate (43) protrudes downward from the lower surface of the lifting box (41) and is located at the lower limit position, the supporting plate (43) abuts against the inner square steel pipe (32) of the original top square steel pipe stacking layer (3), and the outer square steel pipe (31) is arranged with a spacing above and below the lifting box (41) between the lifting box (41) and the original top square steel pipe stacking layer (3); When the supporting plate (43) is retracted to above the lower surface of the lifting box (41), the lifting box (41) abuts against the upper surface of the outer square steel tube (31) above the original top square steel tube stacking layer (3), the inner square steel tube (32) is arranged between the supporting plate (43) and the original top square steel tube stacking layer (3), and the lifting box (41) and the inner square steel tube (32) above the original top square steel tube stacking layer (3) are arranged in an upper and lower spacing; The outer square steel tube (31) and the inner square steel tube (32) above the original top square steel tube stacking layer (3) cooperate to form a new top square steel tube stacking layer (3); the outer square steel tube (31) is used to abut against the lower surface of the lifting box (41), and the inner square steel tube (32) is used to abut against the lower surface of the supporting plate (43).

2. The large equipment lifting mechanism according to claim 1 is characterized in that: The outer square steel tubes (31) and the inner square steel tubes (32) on the same square steel tube stacking layer (3) have the same specifications.

3. The large equipment lifting mechanism according to claim 1 is characterized in that: The outer surfaces of the outer square steel tube (31) and the inner square steel tube (32) are both provided with a matte anti-rust paint layer.

4. The large equipment lifting mechanism according to claim 1, characterized in that: The horizontal cross-section of the square steel pipe stack is a square structure, and the cross-section of the square steel pipe stack perpendicular to the horizontal direction is a stepped structure that is narrow at the top and wide at the bottom and is arranged symmetrically on the left and right.

5. The large equipment lifting mechanism according to claim 1, characterized in that: The telescopic push rod (42) is a hydraulic push rod; it also includes a hydraulic station (5), and the hydraulic station (5) is connected to the hydraulic push rod through a hydraulic oil inlet pipe (45) and a hydraulic oil outlet pipe (46) respectively to form a hydraulic circuit.

6. The large equipment lifting mechanism according to claim 5, characterized in that: The oil inlets of the plurality of hydraulic push rods are connected in parallel to the same hydraulic oil inlet pipe (45), and the oil outlets of the plurality of hydraulic push rods are connected in parallel to the same hydraulic oil outlet pipe (46).

7. The large equipment lifting mechanism according to claim 5, characterized in that: The lifting box (41) is provided with a special parallel connection interface, and the same hydraulic station (5) can connect multiple hydraulic push rods in different lifting boxes (41) in parallel through the special parallel connection interface.

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