Steel truss girder lifting appliance

Abstract

The utility model discloses a steel truss girder lifting appliance, relates to the technical field of lifting appliances, and particularly aims to solve the problems that in the background technology, an existing lifting appliance cannot be adjusted according to the size of a steel truss girder, the control of economic cost is not facilitated, the operation difficulty is large, and the number of steps is large. Comprising an upper lifting plate and a lower lifting plate, a plurality of symmetrical limiting rod sets are rotationally arranged between the upper lifting plate and the lower lifting plate, each limiting rod set comprises limiting rods which are symmetrically arranged, through the arrangement of the limiting rod sets, convenience can be achieved when the lifting appliance is used for placing the steel truss girders, meanwhile, self-adaptive fixing can be carried out on the steel truss girders of different specifications, and the lifting appliance is convenient to use. And lifting appliances of other specifications do not need to be replaced for adapting to steel truss girders of different specifications. The problems existing in the background technology are solved.

Description

Technical Field

[0001] This utility model belongs to the field of lifting equipment technology, and specifically relates to a steel truss beam lifting equipment. Background Technology

[0002] Steel truss beams are prefabricated steel structures, composed of upper chords, lower chords, web members, and tie rods. All components are fabricated in the workshop and transported to the construction site, where they are assembled into a whole using bolting or welding. During on-site assembly, to reduce high-altitude work, lower safety risks, and improve assembly accuracy, multiple members are typically assembled into a single segment on the ground before being hoisted to the installation location using heavy-duty lifting equipment. The existing hoisting method involves directly welding large steel plate lugs onto the members as lifting points. This method requires high-quality welding of the lugs, which is difficult to control; simultaneously, the stress is concentrated at the lifting points, necessitating the welding of reinforcing plates to certain areas of the members, resulting in material waste; the lugs are temporary structures that need to be removed later using gas cutting, causing damage to the main structural members and requiring repairs such as painting; furthermore, the installation and removal of the lugs is time-consuming and cannot be reused.

[0003] The patent document with publication number CN 211521352 U discloses a steel truss beam lifting device, which includes an upper flat beam and a lower flat beam. Two screw rods are vertically inserted into the gaps at both ends of the upper and lower flat beams. A nut is screwed onto the top surface of the upper flat beam and the bottom surface of the lower flat beam on each screw rod. A lifting lug is vertically welded to the middle of the top surface of the upper flat beam. The steel truss beam is placed between the upper and lower flat beams, fixed on both sides by the two screw rods, and then lifted by the lifting lug.

[0004] However, when fixing the steel truss beam, the screw rod is vertically fixed and cannot be adjusted according to the size of the steel truss beam. Different sizes can only be made, which is not economical. Furthermore, after placing the steel truss beam, the screw rod needs to be aligned with the upper and lower spreader beams, which increases the difficulty and steps of operation.

[0005] Therefore, there is an urgent need to design a steel truss beam lifting device to solve the above problems. Utility Model Content

[0006] To address the problems of existing lifting devices being unable to be adjusted according to the size of the steel truss beam, hindering cost control, and involving complex and multi-step operations, this invention aims to provide a steel truss beam lifting device. This device includes an upper lifting plate and a lower lifting plate, with multiple sets of symmetrical limiting rods rotatably arranged between them. These limiting rods enable the device to conveniently support steel truss beams and allow for adaptive fixing of steel truss beams of different specifications, eliminating the need to use different lifting devices to accommodate varying beam sizes.

[0007] The core technical concept of this utility model is as follows: considering the characteristics of hoisting on the construction site, the steel truss beam hoisting tool is designed to be able to fix and hoist steel truss beams of various specifications, while also taking into account the convenience of placing the steel truss beams.

[0008] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0009] A steel truss beam lifting device includes an upper lifting plate and a lower lifting plate. The upper lifting plate is provided with several lifting lugs. Multiple sets of symmetrical limit rod groups are rotatably arranged between the upper and lower lifting plates. The limit rod groups include symmetrically arranged limit rods.

[0010] Preferably, the limiting rod includes a bottom rod and a top rod that are hinged to each other, the bottom rod is hinged to the lower hanging plate, and the top rod is connected to the upper hanging plate.

[0011] Preferably, the upper hanging plate is provided with a number of mounting holes, which are adapted to the top rod.

[0012] Preferably, a nut is provided on the push rod, and the nut is compatible with the external thread provided on the push rod.

[0013] Preferably, the bottom rod is also provided with a limiting component, which is arc-shaped and made of rubber or silicone.

[0014] Preferably, a pad is also provided at the bottom of the upper hanging plate, and the pad is adapted to the limit rod assembly.

[0015] Preferably, the lifting lugs are symmetrically arranged along the center point of the upper lifting plate.

[0016] The beneficial effects of this utility model are as follows: This utility model discloses a steel truss beam lifting device. Compared with the prior art, the improvement of this utility model lies in the following aspects:

[0017] (1) This utility model achieves convenient operation of the lifting device when placing the steel truss beam and convenient installation of the upper and lower lifting plates in the later stage by designing the limiting rod group and designing one end of the limiting rod group as a hinged connection.

[0018] Furthermore, the limiting rod is designed as a hinged bottom rod and top rod. Through this simple structure, the limiting rod can adaptively fix steel truss beams of different specifications, so that one lifting tool can meet the lifting needs of steel truss beams of different specifications.

[0019] (3) By setting the limiting component, this utility model can further strengthen the limiting rod's limiting of the steel truss beam. At the same time, the limiting component is made of rubber or other materials, which can increase the contact area with the steel truss beam and protect the surface of the steel truss beam.

[0020] (2) This utility model realizes the adjustment function of the upper hanging plate and the limit rod group by setting several mounting holes on the upper hanging plate; and also sets a pad at the lower end of the upper hanging plate to cooperate with the limit rod, so as to realize further contact between the upper hanging plate and the steel truss beam, and further increase the fixing effect of the upper hanging plate on the steel truss beam. Attached Figure Description

[0021] Figure 1 Main view of the steel truss beam lifting device of this utility model Figure 1 ;

[0022] Figure 2 This is a top view of the hanging plate of this utility model;

[0023] Figure 3 Main view of the steel truss beam lifting device of this utility model Figure 2 ;

[0024] Figure 4 This is a bottom view of the hanging plate of this utility model;

[0025] The components are: 1. Upper hanging plate; 101. Mounting hole; 102. Lifting lug; 2. Lower hanging plate; 3. Limiting rod assembly; 301. Bottom rod; 302. Top rod; 4. Limiting component; 5. Pad block. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solution of this utility model, the technical solution of this utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0027] Example:

[0028] See attached document Figure 1-4 The steel truss beam lifting device shown includes an upper lifting plate 1 and a lower lifting plate 2. Multiple sets of symmetrical limiting rod groups 3 are rotatably arranged between the upper lifting plate 1 and the lower lifting plate 2. When the steel truss beam is lifted, it rests in the space between the upper lifting plate 1 and the lower lifting plate 2. The limiting rod groups 3 fix it on both sides. This steel truss beam lifting device can be prefabricated in the factory in advance.

[0029] Specifically, the limiting rod group 3 includes symmetrically arranged limiting rods; in this embodiment, there are two groups of limiting rod groups 3, which are respectively set at both ends of the upper lifting plate 1 and the lower lifting plate 2, and cooperate with the upper lifting plate 1 and the lower lifting plate 2 to limit the steel truss beam in both horizontal and vertical directions, so as to achieve the purpose of safe hoisting; the limiting rod group 3 can be selected according to the actual strength requirements on site.

[0030] Furthermore, the limiting rod includes a bottom rod 301 and a top rod 302 that are hinged to each other. The bottom rod 301 is hinged to the lower hanging plate 2, and the top rod 302 is connected to the upper hanging plate 1. Specifically, the bottom rod 301 is hinged to the lower hanging plate 2 through a hinge shaft, and the bottom rod 301 and the top rod 302 are damped hinges.

[0031] In order to make the end of the limit rod adjustable so that it can rotate relative to the hinge point of the lower hanging plate 2, and thus adaptively fix steel truss beams of different specifications, several mounting holes 101 are provided on the upper hanging plate 1, and the top rod 302 is provided with external threads. The mounting holes 101 are used in conjunction with the top rod 302. The top rod 302 moves through the upper hanging plate 1 and is fixed to the hanging plate 1 by the nut 303. The internal thread of the nut 303 is used in conjunction with the external thread on the top rod 302.

[0032] Considering that the contact area between the limiting rod and the steel truss beam is limited when the limiting rod is used to limit the steel truss beam, and that the limiting rod is usually made of rigid material to ensure the fixing effect, it is very easy to cause certain damage to the steel truss beam components during the hoisting process, requiring repair of the paint, etc. Therefore, a limiting component 4 is set. Preferably, the limiting component 4 is an arc-shaped structure and the material can be rubber or silicone. By gradually approaching the steel truss beam, the limiting rod squeezes the limiting component 4, increasing the contact area between the limiting component 4 and the steel truss beam, protecting the surface of the steel truss beam components, and further increasing the limiting effect of the limiting rod on the steel truss beam.

[0033] In actual use, it was found that the upper hanging plate 1 could not fit with the upper end of the steel truss beam due to the limiting rod. Therefore, based on this problem, this utility model also designed a pad 5. The pad 5 is fixed to the lower end of the upper hanging plate 1 and is used to transmit the fixing force of the upper hanging plate 1 on the steel truss beam. The pad 5 and the limiting rod work together to fix the steel truss beam from both horizontal and vertical directions. The pad 5 can be made of local materials, and can be made of rigid materials, rubber or silicone materials, or a thick rubber or silicone sleeve can be wrapped around the outer surface of the rigid material to allow for expansion and contraction and fit tightly with the upper steel truss beam.

[0034] To facilitate hoisting by the hoisting machine, two lifting lugs 102 are provided on the upper hoisting plate 1. The two lifting lugs 102 are symmetrically arranged along the center line of the upper hoisting plate 1. This arrangement can share the pulling force of the hoisting machine on the upper hoisting plate 1 and make it more stable during the hoisting process. In actual use, four lifting lugs 102 can also be provided according to the hoisting conditions on site, and they can be symmetrically arranged on the diagonal of the upper hoisting plate 1. This arrangement makes the hoisting process more stable.

[0035] The steps for implementing this new type of steel truss beam lifting device are as follows:

[0036] 1. Place sleepers on the ground to create a flat site for hoisting the steel truss beams;

[0037] 2. Hinge the limiting rods to the lower hanging plate, place the lower hanging plate on the sleepers, and rotate the two limiting rods outwards to both sides and unfold them;

[0038] 3. Place the steel truss beam on the lower hanging plate;

[0039] 4. Based on both sides of the steel truss beam, rotate the limiting rod to a suitable position so that the limiting rod presses against the limiting piece 4 to fix the steel truss beam and fix the position of the limiting rod. Then rotate the top rod 302 so that it is perpendicular to the upper hanging plate 1. During this process, select a suitable pad 5 and fix it to the lower end of the upper hanging plate 1.

[0040] 5. Use a lifting device to slowly lower the upper plate 1 so that the top rod 302 passes through the mounting hole 101, and use nut 303 to fix the top rod 302 on the upper plate 1. At this time, the pad block 5 is placed against the upper end of the steel truss beam.

[0041] 6. Use steel ropes to connect the lifting lug 102 and the lifting device, and start the lifting device to lift the steel truss beam.

[0042] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A steel truss beam lifting device, comprising an upper lifting plate (1) and a lower lifting plate (2), characterized in that: The upper hanging plate (1) is provided with several lifting lugs (102), and multiple sets of symmetrical limit rod groups (3) are rotatably arranged between the upper hanging plate (1) and the lower hanging plate (2). The limit rod group (3) includes symmetrically arranged limit rods.

2. The steel truss beam lifting device according to claim 1, characterized in that: The limiting rod includes a bottom rod (301) and a top rod (302) that are hinged to each other. The bottom rod (301) is hinged to the lower hanging plate (2), and the top rod (302) is connected to the upper hanging plate (1).

3. The steel truss beam lifting device according to claim 1, characterized in that: The upper plate (1) is provided with several mounting holes (101), which are adapted to the top rod (302).

4. The steel truss beam lifting device according to claim 1, characterized in that: A nut (303) is provided on the push rod (302), and the nut (303) is compatible with the external thread provided on the push rod (302).

5. A steel truss beam lifting device according to claim 1, characterized in that: The bottom rod (301) is also provided with a limiting component (4), which is arc-shaped and made of rubber or silicone.

6. A steel truss beam lifting device according to claim 1, characterized in that: The bottom end of the upper hanging plate (1) is also provided with a pad (5), which is compatible with the limit rod group (3).

7. A steel truss beam lifting device according to claim 1, characterized in that: The lifting lugs (102) are symmetrically arranged along the center point of the upper hanging plate (1).

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