Improved steel rail cementing insulation joint

Abstract

The utility model relates to the technical field of railway engineering and electric service, in particular to an improved steel rail cementing insulation joint which comprises a composite clamping plate and a bolt fastening assembly, the composite clamping plate is provided with an open hole matched with the bolt fastening assembly, the cementing surface of the composite clamping plate is matched with the rail web section arc line of a steel rail, and the open hole is matched with the bolt fastening assembly. The composite clamping plate comprises a groove-shaped steel plate, an insulating layer and a clamping plate body, the insulating layer is arranged between the groove-shaped steel plate and the clamping plate body, and the groove-shaped steel plate, the insulating layer and the clamping plate body are bonded and attached into an integrated structure through thermocuring of the insulating layer. The utility model has the advantages that a variable cross-section structure is adopted, so that the mechanical property of a key position is improved in a targeted manner, and meanwhile, the overall weight is prevented from being increased too much and assembly interference is avoided; the thickness of the insulating layer is increased to improve the capacitive reactance of the insulating joint and improve the comprehensive insulating performance; and by adding the edge covering design, insulation failure can be further avoided.

Description

Technical Field

[0001] This utility model relates to the fields of railway engineering and electrical engineering, specifically to an improved rail adhesive bonding insulation joint. Background Technology

[0002] On high-speed electrified seamless tracks, the adhesive-bonded insulated rail joint is a crucial component of the insulating joint. Its application in electrified seamless tracks utilizes adhesives and bolts to combine the insulating clamp with two rail sections at the rail web, forming a joint. This ensures the rails do not separate under temperature and force, while simultaneously maintaining insulation between the two rail sections and separating track signals. With the rapid development of high-speed railways in my country, the mileage, load capacity, and frequency of train passages are constantly increasing, leading to increasingly stringent requirements for seamless track. The requirements for adhesive-bonded insulated joints in terms of high-voltage resistance, insulation stability, and fatigue performance urgently need further enhancement. Summary of the Invention

[0003] The purpose of this invention is to address the shortcomings of the existing technology by providing an improved rail adhesive-bonded insulated joint. This joint enhances the electrical insulation and mechanical properties of the insulated joint without compromising other performance characteristics, thus providing strong support for the maintenance of seamless electrified high-speed railway lines.

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

[0005] An improved rail adhesive-bonded insulating joint is characterized by comprising a composite clamping plate and a bolt fastening assembly. The composite clamping plate is provided with openings that match the bolt fastening assembly. The adhesive surface of the composite clamping plate matches the arc of the rail web section. The composite clamping plate comprises a channel steel plate, an insulating layer, and a clamping plate, wherein the insulating layer is disposed between the channel steel plate and the clamping plate. The three components are bonded together into a single structure by heat curing the insulating layer.

[0006] The back of the clamp is provided with transverse reinforcing ribs and longitudinal reinforcing ribs, wherein the longitudinal reinforcing ribs are located at the rail joints and are arranged longitudinally, and the transverse reinforcing ribs are provided on the upper and lower sides of the longitudinal reinforcing ribs respectively, and the transverse reinforcing ribs are arranged transversely along the length of the clamp.

[0007] The transverse reinforcing ribs located above the longitudinal reinforcing ribs are arranged along the length of the clamping plate, while the transverse reinforcing ribs located below the longitudinal reinforcing ribs are arranged locally along the length of the clamping plate.

[0008] The adhesive surface of the composite plywood is surrounded by an insulating lining.

[0009] The composite clamp has a length of 870 mm.

[0010] The bolt fastening assembly includes a bolt, an insulating sleeve, a nut, and a washer, wherein the insulating sleeve is fitted onto the bolt, the nut is used to secure the bolt, and the washer is disposed between the nut and the clamping plate.

[0011] It also includes insulating end pieces installed between the rails.

[0012] The advantages of this utility model are: the use of a variable cross-section structure to improve the mechanical properties of key positions while avoiding excessive increase in overall weight and assembly interference; the increase in insulation layer thickness to improve the capacitive reactance of the insulation joint and improve the overall insulation performance; and the addition of an edge-covering design to further prevent insulation failure. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall assembly of this utility model;

[0014] Figure 2 This is an exploded view of the composite clamping plate in this utility model;

[0015] Figure 3 This is a back view of the composite clamping plate in this utility model. Detailed Implementation

[0016] 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:

[0017] like Figure 1-3 As shown in the figure, the numbers 1-13 represent: composite clamp 1, rail 2, insulating end piece 3, bolt 4, insulating sleeve 5, nut 6, washer 7, channel steel plate 8, insulating layer 9, clamp 10, insulating edge 11, longitudinal reinforcing rib 12, and transverse reinforcing rib 13.

[0018] Example: Figures 1 to 3 As shown, the improved rail adhesive-bonded insulating joint in this embodiment includes a composite clamp 1, adhesive, insulating end piece 3, and bolt fastening assembly.

[0019] like Figure 2 and Figure 3 As shown, in this embodiment, the adhesive surface of the composite clamp 1 matches the arc of the rail web section of the rail 2. The composite clamp 1 includes a channel steel plate 8, an insulating layer 9, and a clamp 10, wherein the insulating layer 9 is disposed between the back of the channel steel plate 8 and the clamp 10, and the three are bonded together into a single structure by heat curing the insulating layer 9.

[0020] In this embodiment, the overall size of the splice 10 is extended, and the arc surface of its adhesive surface is slightly reduced to reserve the thickness of the insulation layer. Combined with the increase in the thickness of the epoxy adhesive and lining of the insulation layer, the arc surface size of the adhesive surface of the final composite splice 1 remains unchanged, thereby enhancing the insulation performance without affecting the construction process.

[0021] Meanwhile, the back of the clamp 10 is thickened by transverse reinforcing ribs 13, and longitudinal reinforcing ribs 12 are added between the third and fourth holes of the clamp 10, which can effectively ensure the strength of the middle position of the joint (i.e., the splicing point of the two rail sections). Through the design of transverse reinforcing ribs 13 and longitudinal reinforcing ribs 12, sufficient mechanical performance support is provided while avoiding interference from the track fasteners. The moment of inertia of the clamp 10 at this position can be increased by 28% (X-axis) and 68% (Y-axis) according to test results. The transverse reinforcing ribs 13 on the clamp 10 further adopt a variable cross-section design to avoid interference from the track fasteners.

[0022] An insulating material is added around the adhesive surface of the composite plywood 1. By using the same material as the insulating layer 9 to flip over, the side edges and top and bottom edges of the plywood 10 adjacent to the adhesive surface are covered. This can effectively prevent insulation failure caused by the adhesion of conductive impurities and improve the overall insulation performance.

[0023] The installation and usage method of this embodiment is as follows:

[0024] Before installation, the adhesive surfaces of the composite clamp 1 and the rail 2 are ground to remove rust and dirt; the adhesive is mixed and then evenly applied or poured between the composite clamp 1 and the rail 2; insulating end pieces 3 are placed between the two ends of the rail 2, and insulating sleeves 5 are nested on bolts 4; shims 7 are inserted and nuts 6 are tightened to fix the composite clamp 1 and the rail 2, forming a complete joint.

[0025] In this embodiment, the length of the clamp 10 is 870mm, which can effectively improve the bonding area and fatigue strength. After forming the joint, it will not interfere with the installation and wiring of other electrical facilities and equipment on the rail line.

[0026] The thickening of the adhesive bonding surface allows the gap between the clamping plate 10 and the rail web to reach more than 3mm, effectively improving its capacitance.

[0027] The insulating edge is located between the back of the rail 2 and the clamp 10, which effectively improves the insulation between the metals.

[0028] 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. An improved adhesive-bonded insulating joint for rails, characterized in that: The system includes a composite clamping plate and a bolt fastening assembly. The composite clamping plate has openings that match the bolt fastening assembly. The adhesive surface of the composite clamping plate matches the arc of the rail web section. The composite clamping plate includes a channel steel plate, an insulating layer, and a clamping plate. The insulating layer is disposed between the channel steel plate and the clamping plate. The three components are bonded together into a single structure by heat curing the insulating layer.

2. The improved rail adhesive-bonded insulating joint according to claim 1, characterized in that: The back of the clamp is provided with transverse reinforcing ribs and longitudinal reinforcing ribs, wherein the longitudinal reinforcing ribs are located at the rail joints and are arranged longitudinally, and the transverse reinforcing ribs are provided on the upper and lower sides of the longitudinal reinforcing ribs respectively, and the transverse reinforcing ribs are arranged transversely along the length of the clamp.

3. An improved adhesive-bonded insulating joint for rails according to claim 2, characterized in that: The transverse reinforcing ribs located above the longitudinal reinforcing ribs are arranged along the length of the clamping plate, while the transverse reinforcing ribs located below the longitudinal reinforcing ribs are arranged locally along the length of the clamping plate.

4. An improved adhesive-bonded insulating joint for rails according to claim 1, characterized in that: The adhesive surface of the composite plywood is surrounded by an insulating lining.

5. An improved rail adhesive-bonded insulating joint according to claim 1, characterized in that: The composite clamp has a length of 870 mm.

6. An improved rail adhesive-bonded insulating joint according to claim 1, characterized in that: The bolt fastening assembly includes a bolt, an insulating sleeve, a nut, and a washer, wherein the insulating sleeve is fitted onto the bolt, the nut is used to secure the bolt, and the washer is disposed between the nut and the clamping plate.

7. An improved rail adhesive-bonded insulating joint according to claim 1, characterized in that: It also includes insulating end pieces installed between the rails.

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