Insulated rail fastener and installation method thereof

Abstract

The present invention discloses an insulating rail fastener, comprising: a U-shaped insulating plate, which comprises a horizontal portion and vertical portions arranged at both ends of the horizontal portion, and an L-shaped slot is arranged on any vertical portion so that the line between the two L-shaped slots forms a U-shaped accommodation space; a U-shaped elastic cushion layer, which is clamped in the U-shaped accommodation space; an iron pad, which is arranged on the U-shaped elastic cushion layer, and the iron pad is provided with a gauge block and elastic bars adapted to the rail; a fixing bolt, which passes through the iron pad, the U-shaped elastic cushion layer and the U-shaped insulating plate in sequence, and extends into the sleeper. The present invention further claims protection for an installation method based on the insulating rail fastener. The present invention adopts a fully enclosed insulating structure, which not only has good insulation performance, but also can effectively prevent lateral displacement between components.

Description

Technical Field

[0001] The present invention relates to the technical field of rail fasteners, and more particularly to an insulating rail fastener and a method for installing the same. Background Art

[0002] Rail fasteners are generally used as fastening devices to fix rails in rail transportation to fasten rails and the foundation under the rail. When fastening rails and the foundation under the rail, insulating rail fasteners have good insulation properties on the one hand, preventing stray current leakage from causing corrosion of rails and their metal components, and on the other hand, they transmit the force received by the rails to the foundation under the rail to prevent longitudinal and lateral displacement of the rails. It is best to provide a certain rail elasticity to reduce vibration and noise.

[0003] The existing insulated rail fasteners, on the one hand, although they have good insulation properties, when the external environmental conditions are poor (severe humidity or dirt coverage), the insulation performance of the rail fastener system cannot be effectively guaranteed, which may lead to the leakage of stray current and corrosion of the rails and their metal components; on the other hand, during the operation of rail vehicles, the rail fasteners will be subjected to lateral forces from the tracks, and the iron pads, elastic pads and insulating pads will be subject to great interaction forces. The friction between the iron pads, elastic pads and insulating pads is not sufficient to overcome the lateral interaction forces, which will cause the elastic pads and even the iron pads to shift sideways, affecting the safety and stability of the rail system, and having an adverse effect on driving safety and riding comfort.

[0004] In the invention patent with announcement number CN219490549U and name of insulated rail fastener, an insulated rail fastener is disclosed, including an insulating iron pad lower pad, an iron pad lower height adjustment pad, an iron pad, a support seat, an insulating gauge block, an insulating rail pad under the rail, a rail height adjustment pad under the rail, spring bars, bolts and insulating pipe pads. Although the disclosed insulated rail fastener realizes the adjustment of the transverse and longitudinal positions of the rails by setting insulating gauge blocks of different models and height adjustment pads of different thicknesses to facilitate the adjustment of the horizontal and vertical positions of the rails when the structure settles or shifts, it solves the insulation problem of the rail system through insulating components such as the insulating iron pad lower pad, the insulating gauge block, the insulating rail pad under the rail and the insulating pipe pad. The structure is complex and it cannot overcome the lateral displacement between multiple components. Summary of the invention

[0005] An object of the present invention is to solve at least the above problems and to provide at least the advantages which will be described hereinafter.

[0006] Another object of the present invention is to provide an insulating rail fastener which adopts a fully enclosed insulating structure and not only has good insulating performance but also can effectively prevent lateral displacement between components.

[0007] In order to achieve these purposes and other advantages according to the present invention, there is provided an insulating rail fastener, comprising:

[0008] A U-shaped insulating plate comprises a horizontal portion and vertical portions arranged at both ends of the horizontal portion, wherein an L-shaped slot is arranged on any vertical portion so that a line connecting the two L-shaped slots forms a U-shaped accommodation space;

[0009] A U-shaped elastic cushion layer, which is clamped in the U-shaped accommodation space;

[0010] An iron pad, which is arranged on the U-shaped elastic pad, and the iron pad is provided with a gauge block and elastic bars adapted to the rail;

[0011] A fixing bolt passes through the iron pad, the U-shaped elastic pad and the U-shaped insulating plate in sequence and extends into the sleeper;

[0012] The spring bar is arranged on the spring bar base, the gauge block abuts between the rail and the spring bar base, and the spring bar base is arranged on the iron pad through a self-locking buckle structure, and the self-locking buckle structure includes:

[0013] A T-shaped plate, comprising an integrally formed horizontal plate and a vertical block arranged at the bottom of the horizontal plate, wherein both ends of the vertical block are dovetail-shaped ends, and both sides of the vertical block are provided with trapezoidal grooves;

[0014] A pair of expansion blocks, which are respectively arranged in the trapezoidal grooves on the two sides of the vertical block and are slightly larger than the trapezoidal grooves;

[0015] Among them, the horizontal plate and a part of the vertical block of the T-shaped plate are inserted into the adapting grooves arranged on the spring bar base along the length direction of the rail; the other part of the vertical block is inserted into the iron pad, U-shaped elastic pad and U-shaped insulating plate from top to bottom in sequence, and the expansion block is located in the U-shaped elastic pad and the U-shaped insulating plate, and the iron pad is provided with a positioning groove for the vertical block to be inserted.

[0016] Preferably, the U-shaped elastic cushion layer comprises a rigid U-shaped inner core and a U-shaped elastic covering layer covering the outer surface of the rigid U-shaped inner core.

[0017] Preferably, both sides of the U-shaped elastic covering layer facing the U-shaped insulating plate are provided with elastic protrusions, and the sides of the U-shaped insulating plate facing the elastic protrusions are provided with matching grooves.

[0018] Preferably, the iron pad and the U-shaped elastic pad are provided with through threaded holes for the fixing bolts to pass through at corresponding positions, and the U-shaped insulating plate is provided with an opening facing the through threaded holes.

[0019] Preferably, a slope is provided on a side of the vertical portion of the U-shaped insulating plate away from the rail.

[0020] Preferably, the upper surface of the iron backing plate is flush with the upper surface of the vertical portion of the U-shaped insulating plate.

[0021] Preferably, the ratio of the height of the horizontal portion of the U-shaped elastic pad to the height of the horizontal portion of the U-shaped insulating plate is 2-3:1.

[0022] The present invention further claims a method for installing the insulating rail fastener, comprising:

[0023] Step 1: The U-shaped elastic cushion layer is clamped in the U-shaped accommodation space of the U-shaped insulating board through a mortise and tenon structure;

[0024] Step 2: Install the iron plate on the U-shaped elastic cushion layer by fixing bolts to form a prefabricated module;

[0025] Step three: adjust the position of the prefabricated module so that the gauge block is buckled on the rail and the spring bar is buckled on the gauge block.

[0026] The present invention has at least the following beneficial effects:

[0027] First, the insulating rail fastener provided by the present invention comprises an iron pad, a U-shaped elastic pad layer and a U-shaped insulating plate arranged from top to bottom, wherein the U-shaped insulating plate is provided with a U-shaped accommodation space to accommodate the U-shaped elastic pad layer, so that the U-shaped insulating plate and the U-shaped elastic pad layer form a connection structure similar to a mortise and tenon joint, and an iron pad is arranged in the space between the U-shaped elastic pad layer and the U-shaped insulating plate, so that the iron pad and the U-shaped elastic pad layer are both covered in the inner groove of the U-shaped insulating plate, forming a fully-enclosed insulating structure, thereby ensuring the insulating performance of the rail fastener, and even under poor environmental conditions, its insulating performance is not greatly affected;

[0028] Secondly, after the U-shaped insulating plate and the U-shaped elastic pad are connected by a mortise and tenon structure, the iron pad, the U-shaped elastic pad and the U-shaped insulating plate are fixed together in the vertical direction by fixing bolts, and the U-shaped elastic pad and the iron pad are both arranged in the inner groove of the U-shaped insulating plate, which fundamentally prevents the lateral displacement problem between the iron pad and the U-shaped elastic pad;

[0029] Thirdly, the insulating rail fastener provided by the present invention includes only an iron pad, a U-shaped elastic pad and a U-shaped insulating plate in addition to the inherent gauge block and the spring bar, and has a simple structure, convenient installation and maintenance, and low cost;

[0030] Fourthly, the insulating rail fastener provided by the present invention is provided with a self-locking buckle structure. After the U-shaped elastic cushion layer, the U-shaped insulating plate and the iron pad can be prefabricated into a module, the gauge block and the spring bar base can be quickly installed according to the positioning grooves provided on the iron pad, which greatly simplifies the installation of the insulating rail fastener;

[0031] Fifth, the insulated rail fastener provided by the present invention is provided with a self-locking structure to improve the stability of the insulated rail fastener in the direction perpendicular to the rail, which can effectively prevent the lateral displacement of the rail and improve the safety of rail operation.

[0032] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a structural schematic diagram of the insulating rail fastener described in one technical solution of the present invention;

[0034] Figure 2 It is a structural schematic diagram of the U-shaped elastic cushion layer in another technical solution of the present invention;

[0035] Figure 3 This is a schematic diagram of the installation of the self-locking buckle structure in another technical solution of the present invention;

[0036] Figure 4 It is a schematic diagram of the self-locking structure described in another technical solution of the present invention. DETAILED DESCRIPTION

[0037] The present invention is further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0038] It should be understood that terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0039] like Figures 1 to 4 As shown, the present invention provides an insulating rail fastener, comprising:

[0040] A U-shaped insulating plate 6, comprising a horizontal portion and vertical portions arranged at both ends of the horizontal portion, wherein an L-shaped slot is provided on any vertical portion, so that a line connecting the two L-shaped slots forms a U-shaped accommodation space;

[0041] A U-shaped elastic cushion layer 7, which is clamped in the U-shaped accommodation space;

[0042] An iron plate 4 is arranged on the U-shaped elastic cushion layer 7, and a gauge block 2 and an elastic bar 3 adapted to the rail 1 are arranged on the iron plate 4;

[0043] A fixing bolt 8, which passes through the iron backing plate 4, the U-shaped elastic cushion layer 7 and the U-shaped insulating plate 6 in sequence, and extends into the sleeper;

[0044] The spring bar 3 is arranged on the spring bar base 9, the gauge block 2 abuts between the rail 1 and the spring bar base 9, and the spring bar base 9 is arranged on the iron pad 4 through a self-locking buckle structure, and the self-locking buckle structure includes:

[0045] The T-shaped plate 10 comprises an integrally formed horizontal plate 102 and a vertical block 101 disposed at the bottom of the horizontal plate 102, wherein both ends of the vertical block 101 are dovetail-shaped ends, and both sides of the vertical block 101 are provided with trapezoidal grooves 104;

[0046] A pair of expansion blocks 103, which are respectively arranged in the trapezoidal grooves 104 on the two sides of the vertical block and are slightly larger than the trapezoidal grooves 104;

[0047] Among them, the horizontal plate 102 of the T-shaped plate and a part of the vertical block 101 are inserted into the matching grooves provided on the spring bar base 9 along the length direction of the rail; the other part of the vertical block 101 is inserted into the iron pad 4, the U-shaped elastic pad 7 and the U-shaped insulating plate 6 from top to bottom in sequence, and the expansion block 103 is located in the U-shaped elastic pad and the U-shaped insulating plate, and the iron pad 4 is provided with a positioning groove for the vertical block 101 to be inserted.

[0048] In the above technical scheme, the insulating rail fastener includes a U-shaped insulating plate 6 and a U-shaped elastic pad 7 connected by a mortise and tenon structure. The specific implementation method of the mortise and tenon connection structure of the U-shaped insulating plate 6 and the U-shaped elastic pad 7 is as follows: the vertical part of the U-shaped insulating plate 6 is provided with an L-shaped groove, and one end of the L-shaped groove is connected to the inner groove of the U-shaped insulating plate 6, so that the horizontal parts of the L-shaped grooves at both ends are linearly connected to form a U-shaped accommodating space, and the L-shaped grooves at both ends serve as mortise openings. The horizontal part of the U-shaped accommodating space overlaps with the inner groove part of the U-shaped insulating plate 6, and space is reserved for installing the iron pad 4. The two ends of the U-shaped elastic pad 7 serve as tenons corresponding to the mortise openings to form a mortise and tenon connection structure. In order to realize the above structure, the U-shaped insulating plate 6 and the U-shaped elastic pad 7 are of equal length in the length direction of the track, and in the width direction of the track, the width of the U-shaped elastic pad 7 is adapted to the U-shaped accommodating space.

[0049] In the above technical solution, the insulating rail fastener also includes an iron pad 4, which is arranged in the inner groove of the U-shaped insulating plate 6 and located above the U-shaped elastic pad 7. In the length direction of the track, the iron pad 4 is equal in length to the U-shaped insulating plate 6 and the U-shaped elastic pad 7. In the width direction of the track, the preferred width of the iron pad 4 is just matched with the inner groove of the U-shaped insulating plate 6. In the height direction of the insulating rail fastener, the upper surface of the iron pad 4 is flush with the upper surface of the vertical part of the U-shaped insulating plate 6.

[0050] In the above technical scheme, the iron pad 4 is provided with an adaptive spring bar 3 and a gauge block 2 to fix the rail 1, and the gauge block 2 is an insulating gauge block. The gauge block 2 and the spring bar 3 adopt the existing structure, such as the structure of the insulating gauge block and the spring bar disclosed in the invention with the publication number CN220166537U and the name of a high-insulation rail fastener for improving the transition resistance of the rail to the ground; and the structure of the insulating gauge block and the spring bar disclosed in the invention patent with the publication number CN107338688A and the name of a rail transit fastener comprising an insulating pad with a protruding structure.

[0051] In the above technical solution, the insulating rail fastener also includes a fixing bolt 8, and a through threaded hole 5 is arranged at the corresponding positions of the iron gasket 4, the U-shaped elastic pad 7 and the U-shaped insulating plate 6. The fixing bolt 8 is inserted into the iron gasket 4, the U-shaped elastic pad 7 and the U-shaped insulating plate 6, and extends into the sleeper. A threaded sleeve that cooperates with the fixing bolt needs to be embedded in the sleeper, so that the fixing bolt 8 connects the iron gasket 4, the U-shaped elastic pad 7 and the U-shaped insulating plate 6 into a whole and fixes them to the sleeper.

[0052] In the above technical solution, a U-shaped accommodating space is provided on the U-shaped insulating plate 6 to accommodate the U-shaped elastic pad 7, so that the U-shaped insulating plate 6 and the U-shaped elastic pad 7 form a stable connection structure similar to a mortise and tenon joint, and an iron pad 4 is arranged in the space between the U-shaped elastic pad 7 and the U-shaped insulating plate 6, so that the iron pad 4 and the U-shaped elastic pad 7 are both covered in the inner groove of the U-shaped insulating plate 6 to form a fully enclosed insulating structure, thereby ensuring the insulation performance of the rail fastener, and even under poor environmental conditions, the insulation performance thereof is not greatly affected; after the U-shaped insulating plate 6 and the U-shaped elastic pad 7 are connected by the mortise and tenon joint structure, the iron pad 4, the U-shaped elastic pad 7 and the U-shaped insulating plate 6 are also fixed as a whole in the vertical direction by fixing bolts 8, and the U-shaped elastic pad 7 and the iron pad 4 are both arranged in the inner groove of the U-shaped insulating plate 6, fundamentally preventing and controlling the lateral displacement problem between the iron pad 4, the U-shaped elastic pad 7 and the U-shaped insulating plate 6. In the above technical solution, the gauge block 2 is buckled on the rail, the spring bar 3 is arranged on the iron pad 4 and buckled on the gauge block 2, the buckling structure between the gauge block 2 and the spring bar 3 and the structure between the spring bar 3 and the spring bar base 9 all adopt the existing structure, and this application does not elaborate on its structure.

[0053] In the above technical solution, the spring bar base 9 is arranged on the iron pad 4 through a self-locking buckle structure, and the self-locking buckle structure includes a T-shaped plate 10 and an expansion block 103 arranged on the T-shaped plate 10, with the direction perpendicular to the length of the rail as the horizontal direction, and the T-shaped plate includes an integrally formed horizontal plate 102 and a vertical block 101, and the horizontal plate 102 and part of the vertical block 101 of the T-shaped plate are inserted into the spring bar base 9 along the length direction of the rail 1, that is, the spring bar base 9 is provided with a slot for the T-shaped plate to be inserted along the length direction of the rail 1, and the two ends of the vertical block 101 are dovetail ends, such as Figure 4 As shown, the end of the vertical block 101 connected to the horizontal plate 102 and the front and rear sides of the other end opposite to the end are set to be dovetail-shaped, so the top of the slot on the spring bar base 9 has a step shape, that is, the step shape formed by the long strip slot body adapted to the horizontal plate part and the arc slot body adapted to the dovetail-shaped end. The top of the slot in the spring bar base 9 forms a step shape, which, on the one hand, makes the spring bar base 9 have horizontal stress, improves the stability of the insulating rail fastener perpendicular to the length direction of the rail, and on the other hand, improves the stability of the connection between the spring bar base and the T-plate. Similarly, when the vertical block is inserted from top to bottom into the positioning groove on the iron pad 4, the stability of the insulating rail fastener perpendicular to the length direction of the rail (i.e., the width direction of the rail) is guaranteed. The two sides of the vertical block 101 are provided with expansion blocks 103, and the material of the expansion block 103 is a smooth elastic material such as a rubber block. The smooth surface facilitates the vertical block 101 to be inserted into the positioning groove from top to bottom. The position of the expansion block 103 in the vertical direction is located between the U-shaped elastic pad and the U-shaped insulating plate, that is, the trapezoidal groove 104 is located in the middle and lower part of the vertical block 101. The size of the expansion block 103 is slightly larger than the trapezoidal groove 104. Since the expansion block 103 has a certain compressibility, after the assembly is completed, the expansion block 103 is in a compressed state in the trapezoidal groove 104. Therefore, there is abutment force between the expansion block 103 and the U-shaped elastic pad and the U-shaped insulating plate, so that the stability of the connection between the vertical block 101 and the iron pad 4, the U-shaped elastic pad and the U-shaped insulating plate is improved. The position of the positioning groove is determined according to the width of the rail, the gauge block 2 and the spring bar base 9, and plays a positioning role in the installation process of the gauge block 2 and the spring bar 3.

[0054] In the above technical solution, the installation method of the insulating rail fastener is as follows:

[0055] Step 1: The U-shaped elastic cushion layer 7 is clamped in the U-shaped accommodation space of the U-shaped insulating plate 6 through a mortise and tenon structure; that is, the U-shaped elastic cushion layer is clamped in the U-shaped accommodation space of the U-shaped insulating plate 6 along the length direction of the rail (in Figure 1For example, the direction perpendicular to the screen is the length direction of the rail) is plugged into the U-shaped receiving cavity formed by the U-shaped insulating plate;

[0056] Step 2: Install the iron plate 4 on the U-shaped elastic cushion layer 7 through fixing bolts 8 to form a prefabricated module;

[0057] Step three: adjust the position of the prefabricated module so that the gauge block 2 is buckled on the rail 1 and the spring bar 3 is buckled on the gauge block 2.

[0058] like Figure 3 As shown, in one of the technical solutions, the U-shaped elastic cushion layer 7 includes a rigid U-shaped inner core 72 and a U-shaped elastic covering layer 71 coated on the outer surface of the rigid U-shaped inner core 72. The rigid U-shaped inner core 72 ensures the bearing capacity of the insulating rail fastener, and the U-shaped elastic covering layer ensures the elasticity of the insulating rail fastener, thereby ensuring the vibration reduction and noise reduction effect of the insulating rail fastener. The rigid U-shaped inner core 72 and the U-shaped elastic covering layer 71 form a multi-layer vibration reduction structure, which further improves the vibration reduction and noise reduction performance of the insulating rail fastener.

[0059] In one of the technical solutions, the U-shaped elastic covering layer 71 is provided with elastic protrusions on both sides facing the U-shaped insulating plate 6, and the U-shaped insulating plate 6 is provided with adaptive grooves on the sides facing the elastic protrusions, so as to further improve the stability of the connection between the U-shaped insulating plate 6 and the U-shaped elastic pad 7 and prevent lateral displacement between the U-shaped insulating plate 6 and the U-shaped elastic pad 7.

[0060] In one of the technical solutions, through threaded holes for the fixing bolts 8 to pass through are provided at corresponding positions of the iron pad 4 and the U-shaped elastic pad 7, and an opening facing the through threaded holes is provided on the U-shaped insulating plate 6. Preferably, a fixing ring sleeve is provided in the through threaded hole, and the fixing ring sleeve is made of an ultra-thin elastic material to ensure the stability of the connection of the fixing bolts 8. Further preferably, the fixing ring sleeve is an insulating ring sleeve.

[0061] Figure 2 As shown, in one of the technical solutions, a slope 61 is provided on the side of the vertical portion of the U-shaped insulating plate 6 away from the rail to prevent serious water accumulation on the surface of the U-shaped insulating plate 6 and affect the insulation performance of the insulating rail fastener.

[0062] In one of the technical solutions, the upper surface of the iron backing plate 4 is flush with the upper surface of the vertical portion of the U-shaped insulating plate 6 to prevent water or dirt from accumulating on the iron backing plate 4 .

[0063] In one of the technical solutions, the ratio of the height of the horizontal portion of the U-shaped elastic cushion layer 7 to the height of the horizontal portion of the U-shaped insulating plate 6 is 2-3:1, so as to ensure the elasticity and bearing capacity of the insulating rail fastener.

[0064] The present invention further claims a method for installing the insulating rail fastener, comprising:

[0065] Step 1: The U-shaped elastic cushion layer 7 is clamped in the U-shaped accommodation space of the U-shaped insulating plate 6 through a mortise and tenon structure;

[0066] Step 2: pre-install the iron plate 4 on the U-shaped elastic cushion layer 7 through fixing bolts 8 to form a prefabricated module;

[0067] Step three: adjust the position of the prefabricated module so that the gauge block 2 is buckled on the rail 1 and the spring bar 3 is buckled on the gauge block 2.

[0068] In the above technical scheme, during the installation process of the insulating rail fastener with a self-locking buckle structure, in step two, the prefabricated module formed by the iron pad 4, fixing bolts 8, U-shaped elastic pad 7 and U-shaped insulating plate 6 is in a temporary state, which is convenient for overall transportation. The fixing bolts 8 only need to temporarily fix the iron pad and do not need to be fully inserted into the U-shaped elastic pad 7. During on-site assembly, the temporarily fixed fixing bolts 8 are further rotated and moved downward until they extend to be fixedly connected with the preset threaded holes on the sleepers; there is also a step between step two and step three: inserting the upper part of the self-locking buckle structure into the rail elastic bar base 9.

[0069] The number of equipment and process sizes described herein are intended to simplify the description of the invention. Applications, modifications and variations of the insulated rail fastener of the present invention will be apparent to those skilled in the art.

[0070] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. Insulated rail fastener, characterized in that: include: A U-shaped insulating plate comprises a horizontal portion and vertical portions arranged at both ends of the horizontal portion, wherein an L-shaped slot is arranged on any vertical portion, so that a line connecting the two L-shaped slots forms a U-shaped accommodation space; A U-shaped elastic cushion layer, which is clamped in the U-shaped accommodation space; An iron pad, which is arranged on the U-shaped elastic pad, and the iron pad is provided with a gauge block and elastic bars adapted to the rail; A fixing bolt passes through the iron pad, the U-shaped elastic pad and the U-shaped insulating plate in sequence and extends into the sleeper; The spring bar is arranged on the spring bar base, the gauge block abuts between the rail and the spring bar base, and the spring bar base is arranged on the iron pad through a self-locking buckle structure, and the self-locking buckle structure includes: A T-shaped plate, comprising an integrally formed horizontal plate and a vertical block arranged at the bottom of the horizontal plate, wherein both ends of the vertical block are dovetail-shaped ends, and both sides of the vertical block are provided with trapezoidal grooves; A pair of expansion blocks, which are respectively arranged in the trapezoidal grooves on the two sides of the vertical block and are slightly larger than the trapezoidal grooves. The expansion blocks are compressible and made of elastic material with smooth surface. After the expansion blocks are assembled, they are in a compressed state in the trapezoidal grooves; Among them, the horizontal plate and a part of the vertical block of the T-shaped plate are inserted into the adapting grooves arranged on the spring bar base along the length direction of the rail; the other part of the vertical block is inserted into the iron pad, U-shaped elastic pad and U-shaped insulating plate from top to bottom in sequence, and the expansion block is located in the U-shaped elastic pad and the U-shaped insulating plate, and the iron pad is provided with a positioning groove for the vertical block to be inserted.

2. The insulating rail fastener according to claim 1, characterized in that: The U-shaped elastic cushion layer comprises a rigid U-shaped inner core and a U-shaped elastic covering layer covering the outer surface of the rigid U-shaped inner core.

3. The insulating rail fastener according to claim 2, characterized in that: The U-shaped elastic covering layer is provided with elastic protrusions on both sides facing the U-shaped insulating plate, and the U-shaped insulating plate is provided with matching grooves on the sides facing the elastic protrusions.

4. The insulating rail fastener according to claim 3, characterized in that: The iron pad and the U-shaped elastic pad are provided with through threaded holes for the fixing bolts to pass through at corresponding positions, and the U-shaped insulating plate is provided with an opening facing the through threaded holes.

5. The insulating rail fastener according to claim 4, characterized in that: A slope is provided on a side of the vertical portion of the U-shaped insulating plate away from the rail.

6. The insulating rail fastener according to claim 5, characterized in that: The upper surface of the iron backing plate is flush with the upper surface of the vertical portion of the U-shaped insulating plate.

7. The insulating rail fastener according to claim 6, characterized in that: The ratio of the height of the horizontal portion of the U-shaped elastic pad to the height of the horizontal portion of the U-shaped insulating plate is 2-3:

1.

8. The method for installing the insulating rail fastener according to any one of claims 1 to 7, characterized in that: include: Step 1: The U-shaped elastic cushion layer is clamped in the U-shaped accommodation space of the U-shaped insulating board through a mortise and tenon structure; Step 2: Install the iron plate on the U-shaped elastic cushion layer by fixing bolts to form a prefabricated module; Step three: adjust the position of the prefabricated module so that the gauge block is buckled on the rail and the spring bar is buckled on the gauge block.

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