A closing device for closing section of large-span steel truss arch

Abstract

The application discloses a closing device for large-span steel truss arch closing sections, which comprises stress seats arranged on a closing body, fasteners and wedge blocks arranged between the two stress seats, and wedge gaps formed between the two stress seats and matched with the wedge blocks. The application can be used in the closing process of steel truss arches without welding, so that the whole construction process is more efficient and occupies lifting equipment and site for a shorter time. The closing device can also be used to realize the rapid closing of arch-shaped trusses, pipe frames, box girders and other structures made of various materials such as concrete structures and steel structures.

Description

Technical Field

[0001] The invention belongs to a steel structure installation device, and in particular relates to a closing device for closing a large-span steel truss arch section. Background Art

[0002] During the installation of steel truss arches, due to various considerations such as safety, economics, and social impact, some roads or waterways do not allow the installation of steel truss arch support systems. Therefore, the span of the closure section of the steel truss arch has to be made very large. During the final installation of the closure section, large lifting equipment is generally used to lift the closure section. The lifting equipment can only be removed after the closure joint is welded. This installation method requires a long time for the lifting equipment and the lifting site, and it also requires a long period of road or waterway closure. Summary of the Invention

[0003] The object of the present invention is to provide a closing device for closing sections of large-span steel truss arches with higher efficiency and shorter closing and hoisting time.

[0004] The technical solutions adopted to achieve the purpose of the present invention are as follows:

[0005] The present invention provides a closing device for a closing section of a large-span steel truss arch, comprising a force-bearing seat correspondingly arranged on a closing body, a fastener and a wedge block arranged between the two force-bearing seats, and a wedge opening formed between the two force-bearing seats to cooperate with the wedge block.

[0006] The force bearing seat includes a base welded and fixed to the folding body, two parallel support plates welded on the base, a pad arranged at the rear ends of the two support plates, and a wedge plate fixing the front end of the base as the wedge.

[0007] The fastener comprises a screw rod passing through the pads of the two force-bearing seats and a nut matched with both ends of the screw rod to fasten the two force-bearing seats through the pads and the support plate. Beneficial effects

[0008] The present invention eliminates the need for welding during the closure of steel truss arches, resulting in higher efficiency and less time required for hoisting equipment and site installation. The closure method can also be used to rapidly close arch trusses, pipe racks, box girders, and other structures made of various materials, including concrete and steel.

[0009] The technical solution of the present invention is further described below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of the use state of the present invention.

[0011] Figure 2 yes Figure 1 Enlarged view of point A in the middle. DETAILED DESCRIPTION

[0012] See Figure 1 、 Figure 2 The closing device 2 for the closing section of a large-span steel truss arch provided by the present invention includes a force-bearing seat correspondingly arranged on the closing body 1 and 1′, a fastener and a wedge 207 arranged between the two force-bearing seats, and a wedge mouth cooperated with the wedge 207 formed between the two force-bearing seats; the force-bearing seat includes a base 201 welded and fixed to the closing body 1 or 1′, two support plates 203 welded parallel to the base 201, a pad 204 arranged at the rear end of the two support plates 203, and a wedge plate 202 fixing the front end of the base 201 as the wedge mouth, the fastener includes a screw 205 passing through the pad 204 of the two force-bearing seats and a nut 206 cooperating with both ends of the screw 205 to fasten the two force-bearing seats through the pad 204 and the support plate 203.

[0013] The method of use of the present invention is as follows:

[0014] like Figure 1 、 Figure 2 As shown, the closing devices 2 of the present invention are respectively arranged on both sides of the steel truss arch closing bodies 1 and 1' close to the closing opening, with one on each side, one on the upper and one on the lower side. The two force-bearing seats of the closing device 2 of the present invention are respectively welded to the steel truss arch closing bodies 1 and 1';

[0015] After the closing bodies 1 and 1′ are brought to the closing position by the hoisting equipment, the wedge block 207 is inserted from top to bottom into the wedge formed between the wedge plates 202 of the two force-bearing seats and tightened to prevent the two closing bodies 1 and 1′ from vertical displacement. The arch segment is transformed from a state of being stressed by the support system to a state of being stressed axially by the arch segment. After the hoisting equipment is removed, the weight of the arch segment itself is transferred to the arch foot along the arch axis.

[0016] After the wedge block 207 is installed, the pad 204, screw 205 and nut 206 are installed on the two support plates 203 on the two force-bearing seat bases 201. The screw 205 and nut 206 must be tightened to prevent the two closing bodies 1 and 1' from rotating at the closing position and changing the closing width due to temperature shrinkage through the two force-bearing seats.

[0017] After the wedge 207 and the fastener screw 205 and nut 206 are installed, the closing device 2 of the present invention can be removed from the lifting equipment. Since no welding is required during the closing process, the closing device 2 of the present invention has the advantages of higher efficiency and shorter time occupying the lifting equipment and site.

[0018] The preferred embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. The specific structural form, size, shape, and material of the closing device of the present invention can be set as needed, which all fall within the scope of the technical concept of the present invention. Various simple variations of the technical solution of the present invention can be made, and these simple variations all fall within the scope of protection of the present invention.

Claims

1. A closing device for closing a large-span steel truss arch, characterized by It includes a force-bearing seat corresponding to the closing body, a fastener and a wedge block provided between the two force-bearing seats, and a wedge opening that cooperates with the wedge block is formed between the two force-bearing seats; the force-bearing seat includes a base welded and fixed to the closing body, two support plates welded parallel to the base, a pad provided at the rear end of the two support plates, and a wedge plate that fixes the front end of the base as the wedge opening; the fastener includes a screw passing through the pads of the two force-bearing seats and a nut that cooperates with both ends of the screw to fasten the two force-bearing seats through the pad and the support plate.

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