Roof truss lifting support

Abstract

The utility model belongs to the technical field of building construction, and particularly relates to a roof truss lifting support which comprises a lifting support body and a plurality of lifting oil cylinders arranged at the top end of the lifting support body and used for driving a roof truss to move vertically, the lifting support body is vertically fixed to the surface of a foundation, and the lifting oil cylinders are vertically arranged. A plurality of lifting oil cylinders are arranged on the lifting support, the working end of each lifting oil cylinder is vertically downward and is connected with a steel strand, the free end, away from the corresponding lifting oil cylinder, of each steel strand is connected with a vertical sleeve, a plurality of reinforcing rods are fixedly connected between each sleeve and the roof truss, the lifting support is arranged at the mass center position of the roof truss, and the reinforcing rods are fixedly connected between the sleeves and the roof truss. The center of a pattern formed by the connecting lines of the horizontal centers of the lifting oil cylinders and the mass center of the roof truss are located on the same vertical line, and the problem that the gravity center of the irregular roof truss is unstable in the lifting process can be effectively solved by the adoption of the technical scheme.

Description

Technical Field

[0001] This utility model belongs to the field of building construction technology, and specifically relates to a roof truss lifting support. Background Technology

[0002] During the construction of the new Chongqing East Railway Station on the Chongqing-Guizhou Railway, the roof adopted a spatial truss structure system, mainly composed of roof truss structures, roof beams, and roof support structures. The main roof truss is a triangular truss with a maximum span of 72m and lower chord support. Some main trusses are connected to the lower tree-shaped columns via pins, while the remaining main trusses are rigidly connected to the lower straight steel columns. The secondary trusses, column top trusses, and skylight trusses are connected to the main trusses using planar tubular truss structures. This project divides the roof steel structure into two lifting areas and one hoisting area. The roof truss lifting is mainly carried out using lifting supports. However, in actual construction, due to the irregular shape of the roof truss (as shown in the figure), the use of traditional supports for hoisting can easily lead to instability of the center of gravity and cause safety accidents. Therefore, it is necessary to provide a roof truss lifting support to solve this technical problem. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a roof truss lifting support to solve the problem of unstable center of gravity of irregular roof trusses during the lifting process.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A roof truss lifting support includes a lifting support and a lifting cylinder mounted on its top for driving the roof truss to move vertically. The lifting support is vertically fixed to the foundation surface. Multiple lifting cylinders are vertically arranged, with the working end of each cylinder facing vertically downward and connected to a steel strand. The free end of each steel strand away from the lifting cylinder is connected to a vertically placed sleeve. Multiple reinforcing rods are fixedly connected between each sleeve and the roof truss. The lifting support is located at the center of mass of the roof truss, and the center of the pattern formed by connecting the horizontal centers of each lifting cylinder is on the same vertical line as the center of mass of the roof truss.

[0006] Furthermore, a horizontally arranged crossbeam is fixedly connected to the top of the lifting bracket, and the geometric center of the crossbeam and the lifting bracket are on the same vertical line. Each lifting cylinder is vertically fixed to the upper surface of the crossbeam.

[0007] Furthermore, one end of each reinforcing rod is detachably connected to the peripheral surface of the sleeve, and the other end is detachably connected to the surface of the roof truss. The multiple reinforcing rods connected to each sleeve surface are connected to different positions of the roof truss, and each reinforcing rod is inclined and has an angle with the vertical line.

[0008] Furthermore, one end of each reinforcing rod is detachably connected to the sleeve via a thread, and the other end is connected to a connector that is detachably connected to the roof truss.

[0009] Furthermore, the connector is composed of two connecting buckles with semi-circular cross-sections, which are hinged together. One of the connecting buckles is fixedly connected to the reinforcing rod. The two connecting buckles together form a ring that fits onto the surface of the roof truss and are fixedly connected by bolts and nuts.

[0010] The beneficial effects of this utility model are as follows:

[0011] 1. This utility model, by setting multiple lifting cylinders on the lifting support and installing steel strands, sleeves and multiple reinforcing rods on the lifting cylinders, enables the resultant force generated by the connection between the multiple reinforcing rods and the roof truss to be vertically upward when each lifting cylinder is lifted upward simultaneously, and coincides with the vertical center of mass of the roof truss, thus ensuring the stability of the roof truss when it moves upward.

[0012] Other advantages, objectives, and features of this invention will be set forth in the following description and will be apparent to those skilled in the art to some extent, or may be learned by practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0013] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration:

[0014] Figure 1 This is a schematic diagram of the overall structure of the lifting support and roof truss of this utility model;

[0015] Figure 2 This is a side view of the lifting support and roof truss of this utility model.

[0016] Figure 3 This is a top view of the lifting support and roof truss of this utility model;

[0017] Figure 4 This is a schematic diagram of the connector structure of this utility model.

[0018] The following labels are shown in the attached diagram:

[0019] 1. Lifting support, 2. Roof truss, 3. Lifting cylinder, 4. Steel strand, 5. Sleeve, 6. Reinforcing rod, 7. Crossbeam, 8. Connecting parts. Detailed Implementation

[0020] like Figures 1-4 As shown,

[0021] A roof truss lifting support includes a lifting support 1 and a lifting cylinder 3 mounted at its top for vertically moving a roof truss 2. The roof truss 2, as shown in the figure (only a partial schematic diagram of the roof truss 2 is displayed), is the truss for the skylight section of the steel structure of Chongqing East Railway Station. Its shape is somewhat irregular, and it is constructed from multiple welded steel pipes. The lifting support 1 is vertically fixed to the foundation surface. The lifting support 1 consists of three vertically placed main steel structures arranged in an isosceles triangle in the horizontal plane, and multiple hydraulic cylinders welded and fixed to the main steel structures. The structure is composed of connecting steel components, with each main steel structure bolted to the ground. Three lifting cylinders (3) are vertically positioned, each with its working end pointing downwards and connected to a steel strand (4). The lifting cylinders (3) are 100t class, and the steel strands (4) are high-strength, low-relaxation prestressed steel strands with a nominal diameter of 15.24mm, a tensile strength of 1860N / mm², a breaking strength of 260.7KN, a minimum load of 221.5KN at 1% elongation, and a weight of 1.1Kg per meter. The steel strands (4) conform to the international standard ASTM A416-87a, ensuring strict guarantees regarding tensile strength, dimensions, and surface quality. Each of the steel strands 4 has a vertically placed sleeve 5 connected to its free end away from the lifting cylinder 3. Each sleeve 5 is welded and fixedly connected to the roof truss 2 with three reinforcing rods 6. The lifting bracket 1 is set at the center of mass of the roof truss 2. The center of the pattern formed by the horizontal center line of each lifting cylinder 3 is on the same vertical line as the center of mass of the roof truss 2.

[0022] The top of the lifting support 1 is welded and fixedly connected to a horizontally arranged crossbeam 7, which is composed of I-beams. The lifting cylinder 3 is fixed to the upper surface of the crossbeam 7 by bolts and nuts, and the geometric center of the crossbeam 7 and the lifting support 1 are on the same vertical line. Each of the lifting cylinders 3 is vertically fixed to the upper surface of the crossbeam 7.

[0023] As shown in the figure, due to the irregular shape of the roof truss 2, its stability cannot be well controlled during vertical hoisting. Therefore, nine reinforcing rods 6 are used to fix the surface of the roof truss 2. The steel strands 4 and sleeves 5 are driven upward by three lifting cylinders 3 set at the top of the lifting support 1. When the three lifting cylinders 3 lift upward at the same time, the resultant force generated by each reinforcing rod 6 is exactly on the same vertical line as the center of mass of the roof truss 2. Therefore, the three lifting cylinders 3 can stably drive the roof truss 2 to move upward smoothly until the roof truss 2 reaches the designated height. This effectively solves the problem of unstable center of gravity when using a traditional crane for the roof truss 2. During the upward lifting process, each reinforcing rod 6 will not collide with the lifting support 1, ensuring the safety of the construction process.

[0024] In this embodiment, one end of each reinforcing rod 6 is detachably connected to the peripheral surface of the sleeve 5, and the other end is detachably connected to the surface of the roof truss 2. Multiple reinforcing rods 6 connected to the surface of each sleeve 5 are connected at different positions on the roof truss 2. Each reinforcing rod 6 is angled to the vertical and inclined. One end of each reinforcing rod 6 is detachably connected to the sleeve 5 via a thread, and the other end is connected to a connector 8 detachably connected to the roof truss 2. The connector 8 consists of two connecting buckles with semi-circular cross-sections hinged together. One of the connecting buckles is fixedly connected to the reinforcing rod 6, and the two connecting buckles together form a ring that fits onto the surface of the roof truss 2 and is fixedly connected by bolts and nuts.

[0025] As shown in the figure, three reinforcing rods 6 are welded and fixed to the side surface of each sleeve 5, and the three reinforcing rods 6 are all inclined in space. The purpose is to effectively support the roof truss 2, and the nine reinforcing rods 6 work together to ensure the stability of the roof truss 2 during the rising process. The angle of the three reinforcing rods 6 connected to each sleeve 5 is adjusted according to the part that contacts the roof truss 2, and the specific position is as follows. Figure 1 As shown; one end of each reinforcing rod 6 is detachably connected to a connecting rod via a thread, and the connecting rod is welded and fixed to the side surface of the sleeve 5. The end of the reinforcing rod 6 away from the connecting rod is welded and fixed to a connecting piece 8, which is fixed to the surface of the roof truss 2 by bolts and nuts. Of course, the angle of the connecting piece 8 fixed on each reinforcing rod 6 is not the same, and it needs to be adjusted according to the contact position with the surface of the roof truss 2 before it is welded and fixed to the reinforcing rod 6. Through the connecting piece 8 and the connecting rod, the reinforcing rod 6 can be quickly disassembled and assembled, which facilitates the disassembly work after the roof truss 2 is installed, and also facilitates the transportation of the reinforcing rod 6 and the sleeve 5, which can effectively reduce the space occupied during transportation.

[0026] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A roof truss lifting support comprising a lifting support (1) and a lifting cylinder (3) arranged at the top end thereof for driving vertical movement of a roof truss (2), characterized in that: The lifting support (1) is vertically fixed on the ground surface, the lifting oil cylinder (3) is vertically arranged and provided with multiple pieces, and the working end of each piece of lifting oil cylinder (3) is vertically downward and connected with a steel strand (4), the free end of each steel strand (4) away from the lifting oil cylinder (3) is connected with a vertical sleeve (5), and each sleeve (5) and the roof truss (2) are fixedly connected with multiple reinforcing rods (6), wherein the lifting support (1) is arranged at the center of mass position of the roof truss (2), and the pattern center formed by the horizontal center line of each lifting oil cylinder (3) is on the same vertical line with the center of mass of the roof truss (2).

2. A roof truss lift bracket according to claim 1 wherein: The top end of the lifting support (1) is fixedly connected with a horizontally arranged cross beam (7), and the geometric center of the cross beam (7) and the lifting support (1) is on the same vertical line, and each lifting oil cylinder (3) is vertically fixed on the upper surface of the cross beam (7).

3. A roof truss lift bracket according to claim 2, wherein: One end of each reinforcing rod (6) is detachably connected with the peripheral surface of the sleeve (5), and the other end is detachably connected with the surface of the roof truss (2), and the multiple reinforcing rods (6) connected with the surface of each sleeve (5) are connected at different positions of the roof truss (2), and each reinforcing rod (6) forms an angle with the vertical line and is arranged obliquely.

4. A roof truss lift bracket according to claim 3 wherein: One end of each reinforcing rod (6) is detachably connected with the sleeve (5) through threads, and the other end is connected with a connecting piece (8) detachably connected with the roof truss (2).

5. A roof truss lift bracket according to claim 4 wherein: The connecting piece (8) is composed of two connecting buckles with semicircular cross sections, one of the connecting buckles is fixedly connected with the reinforcing rod (6), and the two connecting buckles are connected together to form a circular ring and are detachably connected with the surface of the roof truss (2) through bolts and nuts.

Images