Hydraulic lifting device for the installation of steel networks

Abstract

A hydraulic lifting device for installing steel networks, characterized in that the device comprises: several vertically connected standard sections of the lifting frame, a hydraulic lifting cylinder, a lower bearing and an upper bearing, wherein the standard sections of the lifting frame comprise several groups of several vertically arranged steel bars perpendicular to each other and several horizontal steel bars, and the horizontal steel bars are horizontally fixed between the several vertically arranged steel bars of each group; the hydraulic lifting cylinder is arranged in the cavity of the several vertically connected standard sections of the lifting frame, the lower side of the hydraulic lifting cylinder is fixedly connected to a base plate, and the telescopic end of the hydraulic lifting cylinder is fixedly connected to a head plate;the lower bearing is arranged between the lower side of the hydraulic lifting cylinder and the standard sections of the lifting frame, and the lower bearing comprises a lower support plate, square steel tubes and handwheels, wherein the square steel tubes are rigidly connected to both sides of the lower side of the lower support plate, two telescopically adjustable short force-absorbing square tubes are arranged in the cavities of the square steel tubes, the opposite side walls of the two short force-absorbing square tubes are rigidly connected with detent blocks, the opposite side walls of the two short force-absorbing square tubes are rigidly connected with rectangular strips, and the positions of the rectangular strips are offset from each other;the opposing side walls of the rectangular strips are provided with mounting chambers, racks are fixedly mounted in the mounting chambers, gears are engaged jointly and movably between the two racks, the axes of the gears are firmly penetrated by pivot shafts, the upper ends of the pivot shafts are movably guided through the square steel tubes and the lower support plate and are firmly connected to the handwheels, and the lower ends of the pivot shafts are rotatably mounted on the lower wall surfaces in the cavities of the square steel tubes; the upper bearing is arranged under the head plate, and the upper bearing comprises long force-absorbing square tubes that are fixedly mounted on the lower side of the head plate.

Description

Technical area

[0001] The present utility model relates to the technical field of lifting devices, and in particular to a hydraulic lifting device for the installation of steel networks. State of the art

[0002] The steel network structure is a hyperstatic, higher-order spatial structure composed of numerous bars regularly arranged in two or more directions. Due to the mutual support between the bars, it modifies the load-bearing system of a planar beam structure and can absorb loads from various directions. It is characterized by high stiffness, good integrity, and strong seismic resistance. The basic units that form the steel network structure include triangular pyramids, prismatic bodies with three faces, cubes, truncated square pyramids, and so on. Various network configurations, such as planar beam systems, tetrahedral pyramid systems, and triangular pyramid systems, can be assembled from these basic units.The steel network has a very wide range of applications and can be used for roofs of buildings such as sports halls, cinemas and theatres, waiting halls and rain protection roofs for grandstands in sports venues.

[0003] The lifting method construction approach for steel networks is characterized by low construction costs, minimal disruption from site conditions, and ease of operation, making it a relatively effective method for network installation. With existing lifting equipment, a hydraulic lifting cylinder is typically raised by a standard lift stroke, and then a standard section of the lifting frame is fitted. The pump unit then returns the oil to raise the cylinder body of the hydraulic lifting cylinder, and finally, the load-bearing square steel tube is moved onto the previously fitted standard section, completing one lift stroke. Because the load-bearing square steel tube must be moved by workers and is relatively long, there is a risk during the construction process that it could accidentally fall and cause an accident.At the same time, the relocation process is relatively cumbersome and requires a lot of time and manpower. Content of the utility model

[0004] The purpose of this utility model is to overcome the aforementioned shortcomings of the prior art and to provide a hydraulic lifting device for the installation of steel networks. This device solves the technical problem of existing lifting devices, namely that the force-bearing square steel profile must be manually repositioned during the construction process, a process that is time-consuming and labor-intensive and also carries the risk of the profile accidentally falling and causing an accident.

[0005] To achieve the stated purpose, the present utility model employs the following technical solutions: A hydraulic lifting device for installing steel networks comprises: several vertically connected standard sections of the lifting frame, a hydraulic lifting cylinder, a lower bearing, and an upper bearing, wherein the standard sections of the lifting frame comprise several groups of multiple vertical steel bars arranged perpendicular to one another and multiple horizontal steel bars, and the horizontal steel bars are horizontally fixed between the multiple vertical steel bars arranged perpendicular to one another in each group; the hydraulic lifting cylinder is arranged in the cavity of the multiple vertically connected standard sections of the lifting frame, the lower side of the hydraulic lifting cylinder is fixedly connected to a base plate, and the telescopic end of the hydraulic lifting cylinder is fixedly connected to a top plate;the lower bearing is arranged between the lower side of the hydraulic lifting cylinder and the standard sections of the lifting frame, and the lower bearing comprises a lower support plate, square steel tubes and handwheels, wherein the square steel tubes are rigidly connected to both sides of the lower side of the lower support plate, two telescopically adjustable short force-absorbing square tubes are arranged in the cavities of the square steel tubes, the opposite side walls of the two short force-absorbing square tubes are rigidly connected with detent blocks, the opposite side walls of the two short force-absorbing square tubes are rigidly connected with rectangular strips, and the positions of the rectangular strips are offset from each other;the opposing side walls of the rectangular strips are provided with mounting chambers, racks are fixedly mounted in the mounting chambers, gears are engaged jointly and movably between the two racks, the axes of the gears are firmly penetrated by pivot shafts, the upper ends of the pivot shafts are movably guided through the square steel tubes and the lower support plate and are firmly connected to the handwheels, and the lower ends of the pivot shafts are rotatably mounted on the lower wall surfaces in the cavities of the square steel tubes; the upper bearing is arranged under the head plate, and the upper bearing comprises long force-absorbing square tubes that are fixedly mounted on the lower side of the head plate.

[0006] Preferably, two steel limiting sleeves are firmly mounted on the upper wall surfaces of the horizontal steel bars.

[0007] Preferably, the square steel tubes are rectangular hollow profiles with continuous ends on both sides.

[0008] Preferably, first connecting rods are rigidly connected between the lower support plate of the lower bearing and the base plate, which is connected to the lower side of the hydraulic lifting cylinder. Through holes are formed in the centers of these first connecting rods. Reinforcing blocks are rigidly mounted in these through holes.

[0009] Preferably, the opposing side walls of the two short, force-absorbing square tubes are also provided with rectangular grooves. The two rectangular grooves are offset from each other. During the movement of the two short, force-absorbing square tubes, the racks are movably engaged in the corresponding rectangular grooves.

[0010] Preferably, the upper side of the head plate, which is rigidly connected to the telescopic end of the hydraulic lifting cylinder, is rigidly connected to a steel cap. Preferably, two long, force-absorbing square tubes are provided. An upper support plate is arranged beneath the long, force-absorbing square tubes. Second connecting rods are rigidly connected between the upper support plate and the long, force-absorbing square tubes.

[0011] Preferably, locking grooves are formed on the inner wall surfaces of the steel limiting sleeves. The locking grooves have a "cross" shape.

[0012] The present utility model has the following advantageous effects: 1. The present utility model comprises standard sections of the lifting frame, the lowest standard section of which is permanently installed on the ground. The hydraulic lifting cylinder is located within the cavity of the standard sections of the lifting frame, facilitating the upward adjustment of standard sections after the hydraulic lifting cylinder has been lifted. The lower bearing can provide support between the underside of the hydraulic lifting cylinder and the standard sections of the lifting frame during lifting. After a lifting stroke is completed, the upper bearing supports the top of the hydraulic lifting cylinder, raising the underside of the hydraulic lifting cylinder by one lifting stroke. The arrangement of telescopically adjustable short, force-absorbing square tubes within the cavities of the square steel tubes simplifies operation, thereby accelerating construction progress and reducing construction time. 2. The present utility model features locking grooves on the inner wall surfaces of the steel limiting sleeves, which have a "cross" shape. The opposite ends of the short, force-absorbing square tubes are firmly connected to locking blocks. The locking blocks can be movably engaged in the corresponding locking grooves. This further limits the short, force-absorbing square tubes and improves stability during lifting. Compared to conventional installation methods, there is no accidental falling of the force-absorbing rods. 3. In the present utility model, the base plate and the lower support plate are rigidly connected by first connecting rods. The stability of the device is improved by the fixed mounting of reinforcing blocks in the through-holes. The two ends of the square steel tubes movably penetrate the short, force-absorbing square tubes. While adjusting the short, force-absorbing square tubes, the construction worker turns the handwheels. The handwheels are rigidly connected to the pivot shafts. The handwheels mesh firmly with the gears. The opposing side walls of the two short, force-absorbing square tubes are rigidly connected to rectangular strips, and the opposing side walls of the rectangular strips are provided with mounting chambers. Racks are rigidly mounted in the mounting chambers. The two racks mesh together movably with the gears.The rotation of the gears causes the two racks to move the corresponding short, force-absorbing square tubes apart until the tubes are pushed into the cavities of the corresponding steel retaining sleeves and lock into place. The facing side walls of the two short, force-absorbing square tubes are also provided with rectangular grooves. These rectangular grooves are offset from each other. During the movement of the two short, force-absorbing square tubes, the racks can be movably locked into the corresponding rectangular grooves, which facilitates the insertion of the two short, force-absorbing square tubes into the cavities of the square steel tubes. Description of the attached drawings Fig. Figure 1 is a perspective structural view of the present utility model; Fig. Figure 2 is a perspective structural view of standard sections of the lifting frame of the present utility model; Fig. Figure 3 is a schematic representation of the positional relationship between a hydraulic lifting cylinder, a lower bearing and an upper bearing of the present utility model; Fig. Figure 4 is a perspective structural view of the hydraulic lifting cylinder as well as the lower bearing and the upper bearing of the present utility model; Fig. Figure 5 is a structural view of the interior of a cavity in a square steel tube of the present utility model; and Fig. Figure 6 is a perspective structural view of a steel limiting sleeve of the present utility model. Legend:

[0013] 10-Standard section of the lifting frame; 11-Hydraulic lifting cylinder; 12-Steel cap; 13-Lower bearing; 14-Upper bearing; 15-Vertical steel rod; 16-Horizontal steel rod; 17-Steel limiting sleeve; 18-Head plate; 19-Bottom plate; 20-Lower support plate; 21-First connecting rod; 22-Reinforcing block; 23-Square steel tube; 24-Short force-bearing square tube; 25-Detent block; 26-Handwheel; 27-Long force-bearing square tube; 28-Upper support plate; 29-Second connecting rod; 30-Rectangular strip; 31-Rack; 32-Pivot axle; 33-Gear; 34-Rectangular groove; and 35-Detent groove. Examples of implementation

[0014] As in the Fig. Figures 1-6 show: The present utility model offers a hydraulic lifting device for the installation of steel networks, comprising: standard sections of the lifting frame 10, hydraulic lifting cylinders 11, lower bearings 13 and upper bearings 14.

[0015] The lifting frame 10 has several standard sections. The lowest standard section of the lifting frame 10 is permanently installed on the ground. Several standard sections of the lifting frame 10 are permanently connected by welding. The standard sections of the lifting frame 10 comprise several vertical steel bars 15 and horizontal steel bars 16. The vertical steel bars 15 are in a vertical position, and the horizontal steel bars 16 are in a horizontal position and are permanently connected between two vertical steel bars 15. Two steel end caps 17 are welded to the upper surface of the horizontal steel bars 16.

[0016] The hydraulic lifting cylinder 11 is arranged in the hollow space of the standard sections of the lifting frame 10, which facilitates the upward placement of standard sections of the lifting frame 10 after the hydraulic lifting cylinder 11 has been raised. The lower end of the hydraulic lifting cylinder 11 is rigidly connected to a base plate 19. The telescopic end of the hydraulic lifting cylinder 11 is rigidly connected to a head plate 18. The upper end of the head plate 18 is rigidly connected to a steel cap 12.

[0017] The lower bearing 13 is arranged between the lower side of the hydraulic lifting cylinder 11 and the standard sections of the lifting frame 10 to provide limiting support for the lower bearing 13. The lower bearing 13 comprises a lower support plate 20, two square steel tubes 23, and handwheels 26. The two square steel tubes 23 are each rigidly connected to both sides of the lower side of the lower support plate 20. Two telescopically adjustable short force-absorbing square tubes 24 are arranged within the space of each square steel tube 23.The two steel limiting sleeves 17, which are welded firmly to the upper wall surfaces of the horizontal steel bars 16, allow the short, load-bearing square tubes 24 to be movably locked into them. This exerts a limiting and fixing effect on the short, load-bearing square tubes 24 and prevents them from slipping. Locking blocks 25 are firmly connected to the opposite side walls of each of the two short, load-bearing square tubes 24. Rectangular strips 30 are firmly connected to each of the opposite side walls of the two short, load-bearing square tubes 24. The positions of the rectangular strips 30 are offset from each other and are not on the same straight line. Mounting chambers are formed on each of the opposite side walls of the rectangular strips 30. Racks 31 are firmly mounted in each of the mounting chambers.Gears 33 mesh movably between the two racks 31. The axes of the gears 33 are fixedly penetrated by pivot shafts 32. The upper ends of the pivot shafts 32 movably penetrate the square steel tubes 23 and the lower support plate 20 and are fixedly connected to the handwheels 26. The lower ends of the pivot shafts 32 are rotatably mounted on the lower wall surfaces within the spaces of the square steel tubes 23. Rectangular grooves 34 are also formed on the facing side walls of the two short, force-receiving square tubes 24. The two rectangular grooves 34 are offset from each other. During the movement of the two short force-absorbing square tubes 24, the racks 31 can be movably engaged in the corresponding rectangular grooves 34, which facilitates the insertion of the two short force-absorbing square tubes 24 into the spaces of the square steel tubes 23.

[0018] Locking grooves 35 are formed on the inner wall surfaces of the steel limiting sleeves 17. The locking grooves 35 have a "cross" shape. The locking blocks 25, which are rigidly connected to the opposite ends of the short, force-absorbing square tubes 24, can be movably locked into the corresponding locking grooves 35. This further limits the short, force-absorbing square tubes 24, improves stability during lifting, and, compared to conventional installation methods, prevents the force-absorbing rods from accidentally falling.

[0019] In particular, the base plate 19, which is rigidly connected to the lower side of the hydraulic lifting cylinder 11, and the lower support plate 20 in the lower bearing 13 are rigidly connected by first connecting rods 21. The stability of the device is improved by the rigid mounting of reinforcing blocks 22 in the through-holes.

[0020] The upper bearing 14 is arranged below the head plate 18 to provide support for the head plate 18. The upper bearing 14 comprises two long, load-bearing square tubes 27, which are rigidly mounted to the underside of the head plate 18. An upper support plate 28 is arranged below the two long, load-bearing square tubes 27. Second connecting rods 29 are rigidly connected between the upper support plate 28 and the long, load-bearing square tubes 27. The distance between the two long, load-bearing square tubes 27 is smaller than the distance between the two steel limit sleeves 17, which allows the long, load-bearing square tubes 27 to be supported on the horizontal steel rods 16.

[0021] The operating principle of the present utility model is as follows: Construction workers turn the handwheels 26. The handwheels 26 are rigidly connected to the pivots 32. The handwheels 26 mesh rigidly with the gears 33. Rectangular strips 30 are rigidly connected to the facing side walls of the two short, force-absorbing square tubes 24. Mounting chambers are formed on the facing side walls of the rectangular strips 30. Racks 31 are rigidly mounted in the mounting chambers. The gears 33 mesh together and movably between the two racks 31. The rotation of the gears 33 causes the two racks 31 to push the corresponding short, force-absorbing square tubes 24 apart until the short, force-absorbing square tubes 24 are pushed into the spaces of the corresponding steel limit sleeves 17 and movably locked in place.The hydraulic lifting cylinder 11 then raises by one stroke. Construction workers place standard sections of the lifting frame 10 upwards. They then reverse the direction of the handwheels 26 to retract the short, force-absorbing square tubes 24 into the space of the square steel tube 23. Once the lower end of the hydraulic lifting cylinder 11 has been raised by one stroke, the construction workers again reverse the handwheels 26 to engage the short, force-absorbing square tubes 24 in the steel limiting sleeves 17, thus limiting and securing the hydraulic lifting cylinder 11 and forming a support, thereby completing one lifting cycle. The above operations are repeated to complete the lifting operation.

[0022] The above demonstrates and describes the basic principles, the main features, and the advantages of the present utility model. Those skilled in the art should be aware that the present utility model is not limited to the above embodiments, which, in the above embodiments and description, merely illustrate the principles of the present utility model without deviating from the spirit and scope of the present utility model. Furthermore, various modifications and improvements are made to the present utility model, all of which are within the scope of protection of the claimed present utility model.

Claims

[1] A hydraulic lifting device for installing steel networks, characterized by, that the device comprises: several vertically connected standard sections of the lifting frame, a hydraulic lifting cylinder, a lower bearing and an upper bearing, wherein the standard sections of the lifting frame comprise several groups of several vertically arranged steel bars perpendicular to each other and several horizontal steel bars, and the horizontal steel bars are horizontally rigidly connected between the several vertically arranged steel bars perpendicular to each other in each group; the hydraulic lifting cylinder is arranged in the cavity of the several vertically connected standard sections of the lifting frame, the lower side of the hydraulic lifting cylinder is rigidly connected to a base plate, and the telescopic end of the hydraulic lifting cylinder is rigidly connected to a head plate;the lower bearing is arranged between the lower side of the hydraulic lifting cylinder and the standard sections of the lifting frame, and the lower bearing comprises a lower support plate, square steel tubes and handwheels, wherein the square steel tubes are rigidly connected to both sides of the lower side of the lower support plate, two telescopically adjustable short force-absorbing square tubes are arranged in the cavities of the square steel tubes, the opposite side walls of the two short force-absorbing square tubes are rigidly connected with detent blocks, the opposite side walls of the two short force-absorbing square tubes are rigidly connected with rectangular strips, and the positions of the rectangular strips are offset from each other;the opposing side walls of the rectangular strips are provided with mounting chambers, racks are fixedly mounted in the mounting chambers, gears are engaged jointly and movably between the two racks, the axes of the gears are firmly penetrated by pivot shafts, the upper ends of the pivot shafts are movably guided through the square steel tubes and the lower support plate and are firmly connected to the handwheels, and the lower ends of the pivot shafts are rotatably mounted on the lower wall surfaces in the cavities of the square steel tubes; the upper bearing is arranged under the head plate, and the upper bearing comprises long force-absorbing square tubes that are fixedly mounted on the lower side of the head plate. [2] The hydraulic lifting device for installing steel networks according to claim 1, characterized bythat two steel limiting sleeves are firmly mounted on the upper wall surfaces of the horizontal steel bars. [3] The hydraulic lifting device for installing steel networks according to claim 1, characterized by that the square steel tubes are rectangular hollow profiles with continuous openings on both sides. [4] The hydraulic lifting device for installing steel networks according to claim 1, characterized by , that between the lower support plate of the lower bearing and the base plate which is connected to the lower side of the hydraulic lifting cylinder, first connecting rods are firmly connected, through holes are formed in the centers of the first connecting rods, and reinforcing blocks are firmly mounted in the through holes. [5] The hydraulic lifting device for installing steel networks according to claim 1, characterized by, that the opposing side walls of the two short force-absorbing square tubes are also provided with rectangular grooves, the two rectangular grooves are offset from each other, and during the movement of the two short force-absorbing square tubes the racks are movably engaged in the corresponding rectangular grooves. [6] The hydraulic lifting device for installing steel networks according to claim 1, characterized by , that the upper side of the head plate, which is firmly connected to the telescopic end of the hydraulic lifting cylinder, is firmly connected to a steel cap. [7] The hydraulic lifting device for installing steel networks according to claim 1, characterized bythat two long force-absorbing square tubes are provided, an upper support plate is arranged under the long force-absorbing square tubes, and second connecting rods are firmly connected between the upper support plate and the long force-absorbing square tubes. [8] The hydraulic lifting device for installing steel networks according to claim 2, characterized by that locking grooves are formed on the inner wall surfaces of the steel limiting sleeves, and that the locking grooves have a "cross" shape.

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