Splicing multi-layer steel bar welded mesh for ballastless track

Abstract

The utility model discloses a ballastless track spliced multilayer steel bar welded mesh, which comprises a plurality of transverse bars and a plurality of longitudinal bars, the transverse bars and the longitudinal bars are staggered, two transverse bars and two longitudinal bars with the farthest distance are symmetrically and fixedly provided with fixing plates, the lower parts of the fixing plates are provided with adjusting assemblies, and the adjusting assemblies are connected with the transverse bars and the longitudinal bars. The adjusting assembly comprises a cylinder and a rod body, the top end of the rod body is welded and fixed to the bottom of the fixing plate, the cylinder is slidably connected to the outer side of the rod body, a bolt is arranged on one side of the cylinder, and one end of the bolt is inserted into the cylinder and is in threaded connection with the rod body; when a plurality of layers of reinforcing meshes are installed, the cylinder body is welded on the fixing plate on the next layer of reinforcing mesh, the bolts are aligned with the threaded holes in different positions by adjusting the height of the reinforcing meshes, and the bolts are used for fixing, so that the adjustment of the height between the upper reinforcing mesh and the lower reinforcing mesh is realized; the connection between the longitudinal reinforcing meshes can be accurately positioned through the inserting rods and the inserting grooves.

Description

Technical Field

[0001] This utility model relates to a welded steel mesh, specifically a multi-layer welded steel mesh for ballastless tracks that can be spliced ​​together. Background Technology

[0002] Ballastless track, also known as trackless ballast, refers to a track structure that uses a monolithic foundation of concrete, asphalt mixture, etc., instead of the loose gravel track bed found in traditional ballasted track. It typically consists of structural components such as track slabs, base slabs, and support layers. These components are interconnected and work together to provide stable support for the rails. In the concrete construction of ballastless track, a flat welded wire mesh is laid first, followed by concrete pouring to enhance the overall strength of the concrete. Currently, single layers of welded wire mesh are added in several stages during construction. Ballastless track withstands various loads generated by trains during operation, including the train's own weight and vertical loads such as the load itself. When horizontal loads are generated during starting and braking, the welded wire mesh can effectively distribute these loads to the substructure, preventing excessive stress concentration in local areas. This makes the entire track structure more uniformly stressed, improves the overall load-bearing capacity, and ensures that the track remains stable and reliable under long-term and frequent loads. At the same time, the welded wire mesh reduces the contact area between the steel bars and external corrosive media such as moisture and corrosive gases, providing a certain degree of protection, slowing down the corrosion process of the steel bars, and thus ensuring the mechanical properties of the steel bars in the entire track structure and extending the service life of the track.

[0003] Currently, the spacing between adjacent welded steel meshes on existing ballastless tracks cannot be adjusted. However, adjusting the spacing between the welded steel meshes can change their transmission and distribution mode of the upper load. Therefore, this application proposes a multi-layer welded steel mesh for ballastless tracks to solve this problem. Utility Model Content

[0004] The purpose of this invention is to provide a multi-layer welded steel mesh for ballastless tracks, which solves the problem mentioned in the background art that the spacing between adjacent welded steel meshes on existing ballastless tracks cannot be adjusted, and that adjusting the spacing between welded steel meshes can change the mode of transmission and distribution of the upper load.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A multi-layer welded steel mesh for ballastless track includes horizontal and vertical bars. Multiple horizontal and vertical bars are provided and are staggered. Fixing plates are symmetrically fixed on the two horizontal and vertical bars with the farthest spacing. An adjustment assembly is provided below the fixing plate. The adjustment assembly includes a cylinder and a rod. The top of the rod is welded and fixed to the bottom of the fixing plate. The cylinder is slidably connected to the outside of the rod. A bolt is provided on one side of the cylinder. One end of the bolt is inserted into the inside of the cylinder and threadedly connected to the rod.

[0007] As a further improvement of this utility model, the rod body is provided with a plurality of threaded holes for threaded connection with bolts.

[0008] As a further improvement of this utility model, the cylinder body is provided with through holes for bolts to pass through.

[0009] As a further improvement of this utility model: the two horizontal ribs with the widest spacing are respectively symmetrically fixed with slots and inserts, with the inserts corresponding to the slots.

[0010] As a further improvement of this utility model, the lowest cylindrical body is welded and fixed to the fixed surface.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. In this utility model, when installing multi-layer steel mesh, the cylinder is welded to the fixing plate of the next layer of steel mesh. By adjusting the height of the steel mesh, the bolts are aligned with the threaded holes at different positions and fixed by the bolts, thereby realizing the adjustment of the height between the upper and lower steel meshes.

[0013] 2. This utility model can accurately position the connection between longitudinal steel meshes through the insertion rod and slot. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a partial side view of the present invention.

[0016] Figure 3 This is a partial structural diagram of the present invention.

[0017] Figure 4 This is a partial structural diagram of the present invention.

[0018] Figure 5 This utility model Figure 2 Enlarged view of point A in the middle.

[0019] 1. Slot; 2. Horizontal rib; 3. Vertical rib; 4. Insert rod; 5. Fixing plate; 6. Bolt; 7. Cylinder; 8. Rod; 9. Threaded hole. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figures 1-5 In this embodiment of the utility model, a multi-layer welded steel mesh for ballastless track includes horizontal bars 2 and vertical bars 3. Multiple horizontal bars 2 and vertical bars 3 are provided and are staggered. Fixing plates 5 are symmetrically fixed on the two horizontal bars 2 and vertical bars 3 with the farthest spacing. An adjustment component is provided below the fixing plate 5. The adjustment component includes a cylinder 7 and a rod 8. The top of the rod 8 is welded and fixed to the bottom of the fixing plate 5. The cylinder 7 is slidably connected to the outside of the rod 8. A bolt 6 is provided on one side of the cylinder 7. One end of the bolt 6 is inserted into the inside of the cylinder 7 and threadedly connected to the rod 8.

[0022] The rod body 8 has several threaded holes 9 for threaded connection with bolts 6, and the cylinder body 7 has through holes for bolts 6 to pass through. By screwing the bolts 6 into the threaded holes 9 at different positions through the through holes, the spacing between adjacent upper and lower steel meshes can be adjusted.

[0023] The two horizontal reinforcing bars 2 with the furthest spacing are symmetrically fixed with slots 1 and rods 4 respectively. The rods 4 correspond to the slots 1, realizing the precise connection between adjacent longitudinal steel meshes. After the connection, they are fixed by welding.

[0024] The bottommost cylinder 7 is welded and fixed to the fixed surface.

[0025] The working principle of this utility model is as follows:

[0026] This utility model uses horizontal reinforcing bars 2 and vertical reinforcing bars 3 to form a steel mesh. A fixing plate 5 is fixedly installed on one side of each of the two horizontal reinforcing bars 2 and vertical reinforcing bars 3. The cylindrical body 7 of the bottom layer of steel mesh is welded to the base plate. Raising or lowering the steel mesh allows the rod 8 to insert into or extend from the cylindrical body 7, thus aligning the slots on the cylindrical body 7 with the threaded holes 9 at different positions. Tightening the bolts 6 into the corresponding threaded holes 9 completes the fixing of the bottom layer of steel mesh. When placing the upper steel mesh, the cylindrical body 7 on the upper reinforcing bar is welded to the top of the fixing plate 5 on the lower steel mesh. When connecting longitudinal steel meshes, the insert rod 4 is inserted into the slot 1 of the previous steel mesh, and the connection between the insert rod 4 and the slot 1 is welded for precise alignment. Simultaneously, the connections between the longitudinal reinforcing bars 3 of adjacent longitudinal steel meshes are welded, thus completing the installation of the welded steel mesh.

[0027] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A splicing multi-layer steel welded mesh for ballastless track, comprising cross reinforcement (2) and longitudinal reinforcement (3), characterized in that: The transverse ribs (2) and longitudinal ribs (3) are provided with a plurality of staggered designs, the most distant two transverse ribs (2) and longitudinal ribs (3) are symmetrically and fixedly provided with fixing plates (5), the lower part of the fixing plate (5) is provided with an adjusting assembly, the adjusting assembly comprises a cylinder (7) and a rod (8), the top end of the rod (8) is welded and fixed at the bottom of the fixing plate (5), the cylinder (7) is slidingly connected to the outer side of the rod (8), one side of the cylinder (7) is provided with a bolt (6), one end of the bolt (6) is inserted into the inside of the cylinder (7) and is threadedly connected with the rod (8).

2. The splicable multi-layered reinforcing welded mesh for ballastless track according to claim 1, characterized in that: A plurality of threaded holes (9) are formed in the rod (8) for threadedly connecting with the bolt (6).

3. The splicable multi-layered reinforcing welded mesh for ballastless track according to claim 1, characterized in that: A perforation is formed in the cylinder (7) for the bolt (6) to pass through.

4. The splicable multi-layered reinforcing welded mesh for ballastless track according to claim 1, characterized in that: The most distant two transverse ribs (2) are respectively and symmetrically fixedly provided with a slot (1) and a plug rod (4), and the plug rod (4) corresponds to the slot (1).

5. The splicable multi-layered reinforcing welded mesh for ballastless track according to claim 1, characterized in that: The lowermost cylinder (7) is welded and fixed with a fixed surface.

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