Embedded rail area signal radar speed measuring device for urban rail transit

Abstract

The utility model relates to an embedded rail area signal radar speed measuring device for urban rail transit, which comprises a microwave reflecting device, the microwave reflecting device is a zinc-plated solid iron block, the zinc-plated solid iron block comprises a solid iron core and a zinc-plated layer plated on the surface of the solid iron core, and the surface of the solid iron core is coated with a metal coating. A counter bore used for installing an anchor bolt is formed in the galvanized solid iron block. The utility model has the advantages that: 1) the device is maintenance-free and high in reliability: the device is installed and fixed on a ballast bed by punching a chemical anchor bolt, so that the firmness of a reflector can be ensured, and the maintenance workload is basically avoided in the operation period; 2) the cost is low: the galvanized solid iron block is adopted, materials are universal and easy to purchase and install, and the steel rail and the ballast bed are not influenced; and 3) the generalizability is strong: when the embedded rail is popularized and used in the urban rail transit field, the radar microwave signal reflection quality can be effectively improved, the normal working requirement of a radar velometer can be met, and the application of the reflection device can effectively solve the problem of radar microwave reflection failure.

Description

Technical Field

[0001] This utility model relates to the field of radar speed measurement technology for urban rail transit signal systems, specifically to an embedded track area signal radar speed measurement device for urban rail transit. Background Technology

[0002] Current urban rail transit construction demands higher requirements for vibration and noise reduction, as well as improved electrical safety performance of track systems. Embedded tracks are being gradually promoted in specific sections of some urban rail lines. Embedded tracks are a type of track that uses a polymer elastic material to increase wheel-rail system damping, thereby reducing vibration and noise, improving track insulation, and preventing current leakage. A significant feature is the use of polymer elastic materials to replace traditional fasteners that fix the rails. However, this also brings about the failure of radar speed detectors in signal systems that rely on fasteners as microwave reflectors. When a train travels through an embedded track area, the absence of fasteners renders the radar speed detector unusable. If the wheels slip and spin in this area, signal speed correction fails, onboard equipment malfunctions, and the train experiences emergency braking. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of the existing technology by providing an embedded track area signal radar speed measurement device for urban rail transit. This device utilizes a galvanized solid iron block as a microwave reflection device for the embedded track area signal system radar speed measurement, solving the problem that the embedded track area cannot effectively reflect the microwaves emitted by the radar speed detector due to missing fasteners, thus ensuring the normal operation of the radar speed detector in the embedded track area.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] An embedded track area signal radar speed measurement device for urban rail transit includes a microwave reflector, characterized in that: the microwave reflector is a galvanized solid iron block, the galvanized solid iron block includes a solid iron core and a galvanized layer plated on the surface of the solid iron core, and countersunk holes for installing anchor bolts are provided on the galvanized solid iron block.

[0006] The zinc coating is applied using grade 4 hot-dip galvanizing, and the thickness of the zinc coating is not less than 12 μm.

[0007] Two countersunk holes are symmetrically arranged on the galvanized solid iron block.

[0008] The corners and edges of the top surface of the galvanized solid iron block are rounded.

[0009] The galvanized solid iron block is 120mm long, 60mm wide, and 30mm high, and the length of the anchor bolts installed on it is no more than 110mm.

[0010] The advantages of this utility model are:

[0011] 1) Maintenance-free and highly reliable: Chemical anchors are used to install and fix the track bed, which can ensure the firmness of the reflective material and there is basically no maintenance work during the operation period.

[0012] 2) Low cost: Galvanized solid iron blocks are used, the materials are universal, easy to purchase and install, and have no impact on the rails and track bed.

[0013] 3) High scalability: When embedded tracks are widely used in urban rail transit, they can effectively improve the quality of radar microwave signal reflection and meet the normal working requirements of radar speed detectors. The application of reflection devices can effectively solve the problem of radar microwave reflection failure. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0015] Figure 2 This is a schematic diagram of the structure of this utility model;

[0016] Figure 3 for Figure 2 AA section diagram;

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

[0018] The features and other related features of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments, so as to facilitate the understanding of those skilled in the art:

[0019] like Figure 1-4 As shown in the figure, numbers 1-14 represent: 1. Galvanized solid iron block, 2. Countersunk hole, and 3. Radar speed detector, respectively.

[0020] Example: Figure 1 As shown, the embedded track area signal radar speed measurement device for urban rail transit in this embodiment includes a microwave reflector, which is a galvanized solid iron block 1. The galvanized solid iron block 1 includes a solid iron core and a galvanized layer coated on the surface of the solid iron core. The galvanized layer uses grade 4 hot-dip galvanizing, and the coating thickness is not less than 12μm. This ensures the reflective performance of the microwave reflector in the humid environment of the tunnel, especially preventing environmental impact during long-term use. Two countersunk holes 2 for installing anchor bolts are symmetrically arranged on the galvanized solid iron block 1.

[0021] Combination Figures 1 to 3As shown, considering that the equipment installation does not encroach on the track bed reinforcement, does not come into contact with the track bed evacuation, and does not affect the track bed evacuation, the dimensions of the reflector are set as follows: 120mm long * 60mm wide * 30mm high, and the bolt length is no greater than 110mm. To prevent injury from falls, the four corners and four edges of the top surface of the galvanized solid iron block reflector are rounded with R3 fillets. Countersunk holes are drilled at the anchor bolt locations on the top surface of the galvanized iron block, with a depth of 15mm and a diameter of ∅25mm.

[0022] In the specific implementation of this embodiment:

[0023] (1) such as Figure 4 As shown, the galvanized solid iron block 1 is installed on the track bed surface directly below the vehicle-mounted signal radar speed detector 3. The radar speed detector 3 is typically installed inside the train's steel wheels; therefore, the galvanized solid iron block 1 is installed inside the embedded turnout rail, corresponding to the position of the radar speed detector 3.

[0024] (2) Galvanized solid iron blocks 1, serving as microwave reflectors, are installed at equal intervals parallel to the track direction, 80mm from the rail head. This does not affect the maintenance and replacement of the rails, and the installed surface does not extend beyond the rail surface or encroach on the equipment clearance. Galvanized solid iron blocks 1 are installed every 600mm (±50mm) along the track direction. Considering the train's reverse operation function and the redundant operation requirements of the head and tail radar speed detectors, they must be installed on the inner sides of both the left and right rails.

[0025] Each galvanized solid iron block 1 is fixed with two M8×110 stainless steel (304) chemical anchors with a bolt hole spacing of 80mm. Locking nuts are used. Before drilling holes in the track bed, a metal detector is used to locate the track bed reinforcement and other metal components. The drilling location and depth are strictly controlled to avoid the track bed reinforcement and embedded steel channels, ensuring no impact on the metal inside the track bed.

[0026] During operation, the fixing strength of chemical anchors needs to be checked regularly, and anti-rust paint should be applied as needed.

[0027] Although the above embodiments have described the concept and embodiments of the present invention in detail with reference to the accompanying drawings, those skilled in the art will recognize that various improvements and modifications can still be made to the present invention without departing from the scope of the claims, and therefore will not be elaborated here.

Claims

1. A radar speed measurement device for embedded track area signal of urban rail transit, comprising a microwave reflection device, characterized in that: The microwave reflection device is a galvanized solid iron block, which comprises a solid iron core and a galvanized layer plated on the surface of the solid iron core, and a counterbore for mounting an anchor bolt is arranged on the galvanized solid iron block.

2. The urban rail transit embedded track regional signal radar speed measurement device according to claim 1, characterized in that: The galvanized layer adopts 4-grade hot galvanizing, and the thickness of the galvanized layer is not less than 12 μm.

3. The urban rail transit embedded track regional signal radar speed measurement device according to claim 1, characterized in that: Two counterbores are symmetrically arranged on the galvanized solid iron block.

4. The urban rail transit embedded track regional signal radar speed measurement device according to claim 1, characterized in that: The corners of the top surface of the galvanized solid iron block and the edge are provided with rounded corners.

5. The urban rail transit embedded track regional signal radar speed measurement device according to claim 1, characterized in that: The length of the galvanized solid iron block is 120 mm, the width is 60 mm, and the height is 30 mm, and the length of the installed anchor bolt is not greater than 110 mm.

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