Assembly type rail top air flue screw connecting structure

Abstract

The utility model provides an assembly type rail top air duct screw connecting structure which comprises a U-shaped air duct splicing block which is fixed on a middle plate through a connecting assembly, the two sides of the middle plate are connected and fastened with the two side walls of a rail, and the connecting assembly comprises an embedded bolt arranged in the U-shaped air duct splicing block and a nut matched with the embedded bolt. According to the rail top air duct fixing device, the rail top air duct is fixed, so that the rail top air duct is prevented from deviating or shaking, the stability of the rail top air duct is improved, and the maintenance cost and time are reduced.

Description

Technical Field

[0001] The present application relates to the technical field of assembled air ducts, and in particular to an assembled rail-top air duct screw connection structure. Background Art

[0002] Prefabricated air duct refers to an air duct system that is constructed in a factory or manufacturing site in a prefabricated and modular manner and then assembled and installed on site. This type of air duct system is designed to improve construction efficiency and reduce costs, and is usually flexible to adapt to different engineering needs. When planning and constructing new subway lines or tunnels, prefabricated rail-top air duct structures may be selected to improve construction efficiency and reduce construction period.

[0003] In some existing technologies, when the assembled rail-top air duct structure is in use, the rail-top air duct structure is easily affected by the external environment and other factors, resulting in structural damage. The difficult-to-fix rail-top air duct structure will increase the difficulty of maintenance, and maintenance personnel need to inspect and repair more frequently, which increases maintenance costs and workload. Therefore, in view of the above shortcomings, an assembled rail-top air duct screw connection structure is proposed. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an assembled rail-top air duct screw connection structure for the above-mentioned problems, which is convenient for the installation and fixation of the air duct and reduces the difficulty of maintenance.

[0005] The embodiment of the present application is implemented as follows:

[0006] An embodiment of the present application provides an assembled rail-top air duct screw connection structure, characterized in that it includes a U-shaped air duct block, the U-shaped air duct block is fixed to a middle plate by a connecting assembly, the two sides of the middle plate are fastened to the two side walls of the track, and the connecting assembly includes embedded bolts built into the U-shaped air duct block, and nuts configured with the embedded bolts.

[0007] In some optional embodiments, a steel casing is pre-embedded on the middle plate, and the top end of the pre-embedded bolt passes through the steel casing and is fastened to the middle plate through the nut.

[0008] In some optional embodiments, a stop plate is provided at the bottom end of the embedded bolt, and the diameter of the stop plate is larger than the diameter of the steel casing.

[0009] In some optional embodiments, a clamping steel plate is provided on the top surface of the middle plate at the top pipe opening of the steel casing, the top end of the embedded bolt passes through the clamping steel plate and is fastened to the nut, and the diameter of the clamping steel plate is larger than the pipe diameter of the steel casing.

[0010] In some optional implementation schemes, the U-shaped air duct block is a prefabricated reinforced concrete part, and the embedded bolts are welded and fastened to the steel bars in the U-shaped air duct block.

[0011] In some optional embodiments, the joint surface between the top surface of the U-shaped air duct block and the middle plate is coated with epoxy resin for bonding and sealing.

[0012] In some optional implementation schemes, the top of the embedded bolt and the nut are enclosed by fine stone concrete.

[0013] In some optional embodiments, the inner cavity of the steel casing is filled with cement-based grouting material.

[0014] In some optional embodiments, a washer is provided between the clamping steel plate and the nut.

[0015] In some optional embodiments, the nut is provided in two parts, upper and lower.

[0016] The beneficial effects of the present application are as follows: the present application provides an assembled rail-top air duct screw connection structure, which connects the U-shaped air duct block with the middle plate through pre-embedded connecting parts, thereby achieving the fixation of the rail-top air duct, improving the stability of the rail-top air duct, preventing the rail-top air duct from shifting or shaking, reducing maintenance costs, and saving maintenance time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of a specific embodiment of the utility model.

[0019] Figure 2 It is a structural schematic diagram of a connection assembly of a specific embodiment of the utility model. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0022] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0023] The features and performance of the present application are further described in detail below in conjunction with the embodiments.

[0024] like Figure 1 , Figure 2 As shown, the utility model provides an assembled rail-top air duct screw connection structure, including a U-shaped air duct block 1, the U-shaped air duct block is fixed on a middle plate 2 through a connecting assembly, and the two sides of the middle plate are fastened to the two side walls 3 of the track, and the connecting assembly includes an embedded bolt 4 built into the U-shaped air duct block, and a nut 5 configured with the embedded bolt.

[0025] A steel casing 6 is embedded in the middle plate. The top end of the embedded bolt passes through the steel casing and is connected and fastened to the middle plate through a nut. The steel casing is used to enhance the stability and bearing capacity of the structure.

[0026] The side wall is one of the main supporting parts of the track top air duct structure. It is made of weathering steel and other materials to ensure the stability and durability of the structure. The U-shaped air duct blocks are spliced ​​and fixed in sequence along the radial direction of the track to form a complete air duct.

[0027] The bottom end of the embedded bolt is provided with a stopper plate 7, the diameter of which is larger than the diameter of the steel casing to prevent the embedded bolt from falling off. A clamping steel plate 8 is provided on the top surface of the middle plate at the top pipe opening of the steel casing, and the top end of the embedded bolt passes through the clamping steel plate and is connected and fastened with the nut. The diameter of the clamping steel plate is larger than the diameter of the steel casing to increase the rigidity and stability of the connection structure.

[0028] The U-shaped air duct block is a reinforced concrete prefabricated part, and the embedded bolts are welded and fastened to the steel bars in the U-shaped air duct block. During the production process of the U-shaped air duct block, the embedded bolts are embedded in the steel mesh of the U-shaped air duct block, and the screws are connected to the main bars by welding to ensure the firm connection between the screws and the components during the prefabrication process.

[0029] The joint surface between the top surface of the U-shaped air duct block and the middle plate is coated with epoxy resin for bonding and sealing to ensure that there is no gap after installation.

[0030] The top of the embedded bolt and the nut are covered with fine stone concrete to improve the connection tightness and sealing of the connecting parts.

[0031] The inner cavity of the steel casing is poured with cement-based grouting material. The grouting operation helps to fix the embedded bolts and fill the holes, strengthen the connection of the components, improve the overall stability and sealing, and ensure the stability of the components during use.

[0032] A washer is provided between the clamping steel plate and the nut to increase the stability of the connection and prevent the bolt from damaging the clamping steel plate. Two nuts are provided, one above and one below, to ensure the fastening and connection of the entire structure.

[0033] Prefabricated U-shaped air duct blocks, use appropriate transportation equipment to transport prefabricated components from the manufacturing plant to the actual construction site. The winch and combined forklift are used to transport and lift the prefabricated components. After the prefabricated components are lifted to the correct height, the embedded bolts pass through the steel casing on the middle plate and are fixed by nuts to ensure that the prefabricated components are firmly connected. Then the grouting operation is carried out to inject cement-based grouting materials around and into the inner cavity of the embedded bolts and steel casing to strengthen the connection strength of the prefabricated components and improve the overall stability and sealing. This prevents the rail-top air duct from deflecting or shaking, improves the stability of the rail-top air duct, and reduces the cost and time of maintenance.

Claims

1. An assembled rail top air duct screw connection structure, characterized in that: It includes a U-shaped air duct block, which is fixed to the middle plate by a connecting component, and the two sides of the middle plate are connected and fastened to the two side walls of the track, and the connecting component includes an embedded bolt built into the U-shaped air duct block, and a nut configured with the embedded bolt; a steel casing is embedded in the middle plate, and the top end of the embedded bolt passes through the steel casing and is connected and fastened to the middle plate through the nut; a stop plate is provided at the bottom end of the embedded bolt, and the diameter of the stop plate is larger than the diameter of the steel casing; a clamping steel plate is provided on the top surface of the middle plate at the top pipe opening of the steel casing, and the top end of the embedded bolt passes through the clamping steel plate and is connected and fastened to the nut, and the diameter of the clamping steel plate is larger than the diameter of the steel casing.

2. The assembled rail top air duct screw connection structure according to claim 1, characterized in that: The U-shaped air duct assembly block is a reinforced concrete prefabricated part, and the embedded bolts are welded and fastened to the steel bars in the U-shaped air duct assembly block.

3. The assembled rail top air duct screw connection structure according to claim 2, characterized in that: The top surface of the U-shaped air duct block and the joint surface of the middle plate are coated with epoxy resin for bonding and sealing.

4. The assembled rail top air duct screw connection structure according to claim 3, characterized in that: The top of the embedded bolt and the nut are covered with fine stone concrete.

5. The assembled rail top air duct screw connection structure according to claim 1, characterized in that: The inner cavity of the steel casing is filled with cement-based grouting material.

6. The assembled rail top air duct screw connection structure according to claim 1, characterized in that: A washer is arranged between the clamping steel plate and the nut.

7. The assembled rail top air duct screw connection structure according to claim 6, characterized in that: The nut is provided with two upper and lower nuts.

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