Steel rail freezing connector

Abstract

The utility model discloses a steel rail freezing connector which comprises a clamping plate, a groove used for containing a resistance plate is formed in the clamping plate, the resistance plate is meshed in the groove, and a small part of the resistance plate is exposed outside, so that the resistance plate can be fully in frictional contact with a steel rail after being pre-tightened, large enough longitudinal friction is provided, and the connector is prevented from being pulled open. In addition, the protruding part of the resistance plate does not delay the friction contact between the grooving surface of the resistance plate and the steel rail; the bottom of the groove and the back face of the resistance plate are provided with protrusions or notches with trapezoidal sections, the protrusions or the notches are matched with each other, the anti-climbing capacity of the resistance plate is improved, and therefore the service life of the resistance plate is prolonged. Meanwhile, the resistance plate is meshed in the groove, so that the construction process is simple and convenient, and the fixed clamping plate and the resistance plate do not need to be additionally treated.

Description

Technical Field

[0001] The utility model relates to the technical field of railway equipment, in particular to a rail freezing joint used for connecting rails. Background Art

[0002] The rail freezing joint with a clamp is a connecting fastener used to connect rails. The freezing joint clamps currently used for railway track rail connections are placed on both sides of the rail waist and clamped by bolts to consolidate with the rail waist to achieve connection and load-bearing of the rails.

[0003] For example, a rail freezing joint disclosed in 202121235065.6, in which the clamping plates are arranged in the form of variable cross-sections and are fixed on two rails respectively. This rail freezing joint belongs to the common traditional freezing joint, and currently has the following main problems:

[0004] The contact between the clamp and the rail is steel-to-steel contact with a small friction coefficient. After the rails are connected, due to insufficient longitudinal friction and insufficient tensile strength between the rails and the clamp, the joints of the rails will be pulled apart under the action of thermal expansion and contraction, and the rail gap will increase, further aggravating the impact of the wheels on the rail joints, causing damage to the rails. In severe cases, the rails need to be replaced, and the workload of line maintenance is large.

[0005] In order to solve the problem of low friction, someone disclosed a new type of frozen joint clamp for railway track rails in 201420131549.X. The clamp is installed with upper and lower friction layers to increase the longitudinal friction between the rail and the clamp. However, in this solution, the upper and lower friction layers need to be bonded to the clamp, and the installation process is cumbersome. More importantly, the service life is short. After working for a period of time, the friction layer will crawl along the length of the rail and eventually be worn out and fall off, losing the effect of increasing the longitudinal friction.

[0006] Due to the above reasons, the inventors have conducted in-depth research on rail freezing joints in the hope of designing a new rail freezing joint that can solve the above problems. Utility Model Content

[0007] In order to overcome the above-mentioned problems, the inventors have conducted intensive research and designed a frozen joint of rails, which includes a clamping plate, a groove for accommodating a resistance plate, the resistance plate is engaged in the groove, and a small part is exposed outside, so that the resistance plate can fully come into frictional contact with the rail after pre-tightening, and provide sufficiently large longitudinal friction to avoid the joint from being pulled apart and prevent the rail gap from increasing, and the protruding part of the resistance plate does not prevent the grooved surface of the resistance plate from also coming into frictional contact with the rail; protrusions or notches with trapezoidal cross-sections are provided at the bottom of the groove and the back of the resistance plate, which cooperate with each other to improve the anti-climbing ability of the resistance plate, thereby increasing the service life of the resistance plate; at the same time, since the resistance plate is engaged and installed in the groove, the construction process is simple and convenient, and no additional treatment is required to fix the clamping plate and the resistance plate, thereby completing the utility model.

[0008] Specifically, the purpose of the utility model is to provide a rail freezing joint, which is installed at the joint of two adjacent rails, and the freezing joint includes two clamping plates 1 used in pairs;

[0009] A groove 2 is provided on the clamping plate 1 on the side facing the rail, and a resistance plate 3 is provided in the groove 2.

[0010] The front side of the resistance plate 3 is closely attached to the rail, and the back side of the resistance plate is embedded in the groove 2.

[0011] The friction coefficient between the front side of the resistance plate 3 and the rail is greater than the friction coefficient between the clamping plate 1 and the rail;

[0012] The groove 2 is engaged and fixed with the resistance plate 3 to prevent the resistance plate 3 from creeping longitudinally;

[0013] On the clamping plate 1, on the side away from the rail, a reinforcing rib 11 is arranged below the middle along the length direction of the rail;

[0014] The contour curvature of the upper surface 7 of the clamping plate is consistent with the contour curvature of the connection between the rail head and the rail waist.

[0015] The contour curvature of the lower surface 8 of the clamping plate is consistent with the contour curvature of the connection between the rail bottom and the rail waist.

[0016] The upper surface 7 and the lower surface 8 of the clamping plate are both rough surfaces, which increases the friction between the clamping plate and the rail;

[0017] The hardness of the clamping plate 1 is greater than that of the rail, so that when the clamping plate 1 and the rail are pre-tightened, the surface of the rail is squeezed by the rough surface of the clamping plate to form elastic deformation and tiny concave-convex structures, further increasing the friction between the clamping plate and the rail.

[0018] A plurality of vertically arranged ridges 21 are provided on the bottom surface of the groove 2;

[0019] A plurality of vertically arranged slots 31 are provided on the back side of the resistance plate 3;

[0020] The cross-sectional shapes of the ridge 21 and the slot 31 are both trapezoidal.

[0021] When the resistance plate 3 is engaged with the groove 2 , the ridge 21 is embedded in the slot 31 ; and the ridge 21 fills up the slot 31 , that is, the ridge 21 is in close contact with the slot 31 .

[0022] Wherein, the groove 2 is a rectangular shape with four rounded corners;

[0023] The resistance plate 3 is rectangular in shape, and its four corners are rounded.

[0024] When the resistance plate 3 is engaged in the groove 2, the front surface of the resistance plate 3 protrudes outward by a predetermined height relative to the clamping plate 1, so that when the freezing joint is installed at the joint of two adjacent rails, the resistance plate 3 is close to the rails to increase the longitudinal friction force;

[0025] The predetermined height is 0.1-0.5 mm.

[0026] Wherein, the resistance plate 3 is a plastic plate, a rubber plate, or a resin plate.

[0027] Wherein, a bolt hole 4 is opened on the clamping plate 1;

[0028] The bolt 5 passes through the bolt hole 4 of the clamping plate 1 and the through hole at the end of the rail and is screwed with the nut to fix the rail freezing joint to the rail, thereby fixing the two rails;

[0029] The widening rib 11 is located below the bolt hole 4 .

[0030] Wherein, the bolt hole 4 passes through the groove 2 and the resistance plate 3;

[0031] On the clamping plate 1, on the surface opposite to the groove 2, a boss 6 protruding outward is provided around the bolt hole 4, and the boss is used to increase the strength of the bolt hole on the clamping plate 1 to prevent the clamping plate 1 from being damaged when the bolt 5 is pre-tightened;

[0032] The height of the boss 6 is 5 mm.

[0033] A double-stacked self-locking washer is provided between the nut and the washer 1 for the bolt 5 to pass through, and the double-stacked self-locking washer is provided to protect the clamping plate 1 and prevent the bolt 5 from loosening; the double-stacked self-locking washer is a DIN25201 double-disc self-locking anti-loosening washer;

[0034] On the clamping plate 1, a groove 41 cooperating with a double-stacked self-locking washer or a hexagonal groove 42 cooperating with a bolt head is provided around the bolt hole 4;

[0035] The double-stacked self-locking washer can be partially embedded in the groove 41, thereby preventing the double-stacked self-locking washer from rotating or loosening;

[0036] The bolt head can be partially embedded in the hexagonal groove 42 , thereby preventing the bolt 5 from rotating or loosening.

[0037] Among them, when the bolt 5 is pre-tightened, the resistance plate 3 and the clamp plate 1 are jointly abutted against the waist of the rail, that is, by pre-tightening the bolt 5, the resistance plate 3 is just completely pressed into the groove 2, and while the front side of the resistance plate 3 is in full contact with the waist of the rail, the slotted surface of the clamp plate 1 can also be in full contact with the waist of the rail.

[0038] When the bolt 5 is pre-tightened, the contour curvature of the upper surface 7 of the clamping plate and the contour curvature of the connection between the rail head and the rail waist are close to each other;

[0039] When the bolt 5 is pre-tightened, the contour curvature of the lower surface 8 of the clamping plate and the contour curvature of the connection between the rail bottom and the rail waist are close to each other;

[0040] The surface roughness of the upper surface 7 and the lower surface 8 of the clamping plate is Ra25-Ra50.

[0041] The beneficial effects of the utility model include:

[0042] (1) The rail freezing joint provided by the present invention has a groove on its clamping plate, and the resistance plate is fixedly installed through the groove, which can make the installation of the resistance plate more stable, not only convenient for installation and construction, but also can prolong the service life of the resistance plate, making it difficult to creep during use, thus achieving an anti-climbing effect;

[0043] (2) The rail freezing joint provided by the present invention has a resistance plate installed on its clamping plate, and the friction coefficient of the resistance plate is larger. The resistance plate contacts the rail to increase the longitudinal friction force and prevent the rail gap from increasing;

[0044] (3) In the rail freezing joint provided by the present invention, the resistance plate on the clamping plate protrudes outwardly by a certain height relative to the clamping plate, which can ensure that the resistance plate is in full contact with the rail after pre-tightening and the friction force is large enough, and also ensure that other areas on the grooved surface of the clamping plate are in full contact with the rail, thereby improving the overall strength of the rail freezing joint;

[0045] (4) The rail freezing joint provided by the present invention has a protrusion or notch with a trapezoidal cross section at the bottom of the clamping plate groove and the back of the resistance plate, which cooperate with each other to improve the anti-climbing ability of the resistance plate, especially after the rail freezing joint has been used for a period of time, the cooperation of the protrusion and the notch can ensure that the resistance plate will not move along the length direction of the rail;

[0046] (5) The rail freezing joint provided by the present invention has a clamping plate whose upper and lower surfaces are both roughened to increase the friction between the clamping plate and the rail, and the contours of the upper and lower surfaces are arranged so that the clamping plate can fully contact the rail. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 A schematic diagram showing the structure of the rail freezing joint provided by the utility model when it is installed on the rail;

[0048] Figure 2 A schematic diagram showing the structure of the clamping plate of the rail freezing joint and the resistance plate thereon provided by the utility model;

[0049] Figure 3 A schematic diagram showing the structure of the clamping plate and the groove thereon of the rail freezing joint provided by the utility model is shown;

[0050] Figure 4 A schematic diagram showing the structure of the clamping plate of the rail freezing joint provided by the utility model, which is away from the rail;

[0051] Figure 5 A side view of a clamping plate of a rail freezing joint provided by the utility model is shown;

[0052] Figure 6 A schematic diagram showing the back structure of the resistance plate of the rail freezing joint provided by the utility model is shown;

[0053] Figure 7 A schematic diagram showing the structure of a rail freezing joint provided by the utility model when the resistance plate is a rectangular plate;

[0054] Figure 8 A schematic diagram of the bolt hole structure with grooves of the rail freezing joint provided by the utility model is shown;

[0055] Fig. 9 The utility model shows a schematic diagram of the bolt hole structure with a hexagonal groove of a rail freezing joint provided by the utility model.

[0056] Reference numerals

[0057] 1-Splint

[0058] 11-Reinforcement ribs

[0059] 2-Groove

[0060] 21- ridge

[0061] 3- Resistance plate

[0062] 31-Slot

[0063] 4-Bolt Holes

[0064] 41-Groove

[0065] 42-Hexagonal groove

[0066] 5-Bolt

[0067] 6-Boss

[0068] 7- Upper surface of the splint

[0069] 8- Lower surface of the splint DETAILED DESCRIPTION

[0070] The present invention is further described in detail below through the accompanying drawings and embodiments. Through these descriptions, the features and advantages of the present invention will become clearer and more specific.

[0071] The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise noted.

[0072] The utility model provides a rail freezing joint, such as Figure 1 As shown in , the freezing joint is installed at the joint of two adjacent rails, and the freezing joint includes two clamping plates 1 used in pairs;

[0073] On the clamping plate 1, a groove 2 is provided on the side facing the rail, and a resistance plate 3 is provided in the groove 2. Figure 2 In the present application, the splint is a full-length structure and can be integrally formed by rolling without machining, thereby saving production costs and improving production efficiency;

[0074] The front side of the resistance plate 3 is closely attached to the rail and the waist of the rail, and the back side of the resistance plate is embedded in the groove 2.

[0075] The friction coefficient between the front side of the resistance plate 3 and the rail is greater than the friction coefficient between the clamping plate 1 and the rail; the static friction coefficient reaches about 0.6, and the dynamic friction coefficient reaches about 0.53;

[0076] The groove 2 is engaged and fixed with the resistance plate 3 to prevent the resistance plate 3 from creeping longitudinally. The longitudinal direction in this application refers to the length direction of the rail; during the use of the rail freezing joint, the passing of the train will cause the rail to heat up, and the long-term reciprocating thermal expansion and contraction will cause a longitudinal force to be generated between the two rails. Under the action of this longitudinal force, the resistance plate 3 attached to the surface of the rail will have a tendency to move along the length direction of the rail, which is the longitudinal creep.

[0077] Preferably, on the clamp plate 1, on the side away from the rail, a reinforcing rib 11 is arranged below the middle along the length direction of the rail; in the present application, the strength of the clamp plate 1 is further enhanced by the reinforcing rib to ensure that the clamp plate 1 can bear the force between the two rails.

[0078] Preferably, a plurality of longitudinally arranged ridges 21 are provided on the bottom surface of the groove 2, such as Figure 3 As shown in;

[0079] A plurality of longitudinally arranged slots 31 are provided on the back of the resistance plate 3. Figure 6 As shown in;

[0080] When the resistance plate 3 is engaged with the groove 2, the ridge 21 is embedded in the notch 31. Thus, there is a greater resistance between the high resistance plate 3 and the groove 2 along the length direction of the rail, especially after the rail freezing joint has been installed for a period of time, the resistance plate 3 can be effectively prevented from creeping along the length direction of the rail.

[0081] Preferably, the horizontal cross-sectional shapes of the ridge 21 and the groove 31 are both trapezoidal, especially isosceles trapezoidal. When the resistance plate 3 is filled into the groove 2, the ridge 21 fills the groove 31, that is, the ridge 21 is close to the groove 31, and under the action of elastic force and friction force, the resistance plate is fixed in the groove 2.

[0082] The groove 2 and the resistance plate 3 may be rectangular, such as Figure 7 As shown in , preferably, the four corners of the quasi-rectangle are rounded to avoid stress concentration and improve the service life of the splint and the resistance plate; that is, the four corners of the groove 2 are rounded, and the four corners of the resistance plate 3 are rounded, such as Figure 2 , Figure 3 and Figure 6 Preferably, in the horizontal direction, the cross-sections of the groove 2 and the resistance plate 3 are both trapezoidal, and the trapezoidal cross-section provides a guide for the installation of the resistance plate 3, so that the resistance plate 3 can be installed in the groove 2 quickly and accurately.

[0083] Preferably, when the resistance plate 3 is engaged in the groove 2, the front side of the resistance plate 3 protrudes outwardly by a predetermined height relative to the clamping plate 1, so that when the freezing joint is installed at the joint of two adjacent rails, the resistance plate 3 is close to the rails to increase the longitudinal friction force. The predetermined height is 0.1 to 0.5 mm; the specific height value needs to be set based on the type of the resistance plate.

[0084] Preferably, the resistance plate 3 is a plastic plate, or the resistance plate 3 is a rubber plate, or the resistance plate 3 is a resin plate. More preferably, the resistance plate is a polycarbonate plate. When the resistance plate is a polycarbonate plate, the front side of the resistance plate 3 protrudes outward relative to the clamping plate 1 by a predetermined height of 0.2 mm.

[0085] In a preferred embodiment, bolt holes 4 are provided on the clamping plate 1; preferably, 6 bolt holes are provided side by side;

[0086] The rail freezing joint also includes a bolt 5;

[0087] The bolt 5 passes through the bolt hole 4 of the clamp plate 1 and the through hole at the end of the rail and is screwed with the nut to fix the rail freezing joint to the rail, thereby fixing the two rails. Among them, 3 bolts and 3 bolt holes are used to fix the clamp plate to one rail, and the other 3 bolts and 3 bolt holes are used to fix the clamp plate to the other rail, thereby achieving fixation between the two rails.

[0088] Preferably, the bolt hole 4 passes through the groove 2 and the resistance plate 3 .

[0089] Preferably, the widening rib 11 is located below the bolt hole 4 .

[0090] On the clamping plate 1, on the surface opposite to the groove 2, a boss 6 protruding outward is provided around the bolt hole 4. The height dimension of the protruding boss 6 is 5 mm; by providing the boss 6, the local strength of the bolt hole of the clamping plate 1 is increased to ensure that the clamping plate will not be damaged during the process of pre-tightening the bolt 5.

[0091] Preferably, a double-stacked self-locking washer is sleeved on the bolt 5, that is, a double-stacked self-locking washer is provided between the nut and the gasket 1 for the bolt 5 to pass through. By providing the double-stacked self-locking washer, the splint 1 is protected and the bolt is prevented from loosening, thereby ensuring the construction quality and service life; the double-stacked self-locking washer is a DIN25201 double-disc self-locking anti-loosening washer.

[0092] On the clamping plate 1, a groove 41 cooperating with a double-stacked self-locking washer or a hexagonal groove 42 cooperating with a bolt head is provided around the bolt hole 4; Figure 1 , Figure 4 and Figure 8 , Fig. 9 As shown in;

[0093] The double-stacked self-locking washer can be partially embedded in the groove 41, thereby preventing the double-stacked self-locking washer from rotating or loosening; the groove 41 is provided with a plurality of grooves, evenly distributed around the bolt hole 4;

[0094] The bolt head can be partially embedded in the hexagonal groove 42, thereby preventing the bolt 5 from rotating or loosening; preferably, the installation process of the splint 1 with the hexagonal groove 42 is simpler. After the bolt head is passed through and embedded in the hexagonal groove 42, it is only necessary to tighten the nut with a wrench without clamping the bolt head.

[0095] Preferably, six bolt holes 4 are provided on the clamping plate 1, of which three bolt holes are provided with grooves 41 around them, and three bolt holes are provided with hexagonal grooves 42 around them, and are arranged at intervals from each other. A bolt can pass through two clamping plates 1, wherein a groove 41 is provided around the bolt hole of one clamping plate, and a hexagonal groove 42 is provided around the bolt hole of the other clamping plate.

[0096] Preferably, when the bolt 5 is pre-tightened, the resistance plate 3 and the clamp plate 1 are jointly abutted against the waist of the rail, that is, when pre-tightened, the resistance plate 3 is pressed into the groove 2, and the front side of the resistance plate is flush with the grooved surface of the clamp plate 1, and they are fully in contact with the waist of the rail.

[0097] Preferably, the contour curvature of the upper surface 7 of the clamping plate is consistent with the contour curvature of the connection between the rail head and the rail waist, and when the bolt 5 is pre-tightened, they are close to each other;

[0098] The contour curvature of the lower surface 8 of the clamping plate is consistent with the contour curvature of the connection between the rail base and the rail waist, and they are close to each other when the bolts 5 are pre-tightened; that is, the cross-sectional shape of the clamping plate changes with the change of the shape of the rail.

[0099] Preferably, the upper surface 7 and the lower surface 8 of the clamp are rough surfaces, and the surface roughness reaches Ra25~Ra50, and the roughness can be set to Ra50 more preferably. In the present application, by setting the rough upper and lower surfaces, the friction between the clamp and the rail can be further improved, and the longitudinal friction between the rail and the clamp can be improved.

[0100] Further preferably, the hardness of the clamp plate 1 is greater than the hardness of the rail, so that when the clamp plate 1 and the rail are pre-tightened, the surface of the rail is squeezed by the rough surface of the clamp plate to form elastic deformation and tiny concave-convex structures, so that the surface roughness of the rail is also increased, thereby further increasing the friction between the clamp plate and the rail, and further improving the anti-climbing ability of the clamp plate.

[0101] The present invention has been described above in conjunction with preferred embodiments, but these embodiments are only exemplary and serve only as an illustration. On this basis, the present invention may be subjected to a variety of substitutions and improvements, all of which fall within the scope of protection of the present invention.

Claims

1. A rail freezing joint, characterized in that: The freezing joint is installed at the joint of two adjacent rails, and comprises a clamping plate (1); A groove (2) is provided on the clamping plate (1) on the side facing the rail, and a resistance plate (3) is arranged in the groove (2). The front side of the resistance plate (3) is closely attached to the rail, and the back side of the resistance plate is embedded in the groove (2). The friction coefficient between the front surface of the resistance plate (3) and the steel rail is greater than the friction coefficient between the clamping plate (1) and the steel rail; The groove (2) is engaged and fixed with the resistance plate (3) to prevent the resistance plate (3) from creeping longitudinally; On the clamping plate (1), on the side facing away from the rail, a reinforcing rib (11) is arranged below the middle portion along the length direction of the rail; The contour curvature of the upper surface (7) of the clamping plate is consistent with the contour curvature of the connection between the rail head and the rail waist. The contour curvature of the lower surface (8) of the clamping plate is consistent with the contour curvature of the connection between the rail bottom and the rail waist. The upper surface (7) and the lower surface (8) of the clamping plate are both rough surfaces, which increases the friction between the clamping plate and the rail; The hardness of the clamping plate (1) is greater than the hardness of the rail, so that when the clamping plate (1) and the rail are pre-tightened, the surface of the rail is squeezed by the rough surface of the clamping plate to form elastic deformation and micro-concave-convex structures, further increasing the friction between the clamping plate and the rail; A bolt hole (4) is provided on the clamping plate (1); On the clamping plate (1), a groove (41) cooperating with a washer or a hexagonal groove (42) cooperating with a bolt head is provided around the bolt hole (4); The gasket can be partially embedded in the groove (41), thereby preventing the gasket from rotating or loosening; The bolt head can be partially embedded in the hexagonal groove (42), thereby preventing the bolt (5) from rotating or loosening.

2. The rail freezing joint according to claim 1, characterized in that: A plurality of vertically arranged ridges (21) are provided on the bottom surface of the groove (2); A plurality of vertically arranged slots (31) are provided on the back side of the resistance plate (3); The cross-sectional shapes of the ridge (21) and the groove (31) are both trapezoidal. When the resistance plate (3) is engaged with the groove (2), the ridge (21) is embedded in the notch (31), and the ridge (21) fills the notch (31), that is, the ridge (21) is in close contact with the notch (31).

3. The rail freezing joint according to claim 1, characterized in that: The groove (2) is quasi-rectangular, and its four corners are rounded; The resistance plate (3) is quasi-rectangular, and its four corners are rounded.

4. The rail freezing joint according to claim 1, characterized in that: When the resistance plate (3) is engaged in the groove (2), the front surface of the resistance plate (3) protrudes outward by a predetermined height relative to the clamping plate (1), so that when the freezing joint is installed at the joint of two adjacent rails, the resistance plate (3) is close to the rails, thereby increasing the longitudinal friction force; The predetermined height is 0.1-0.5 mm.

5. The rail freezing joint according to claim 1, characterized in that: The resistance plate (3) is a plastic plate, a rubber plate, or a resin plate.

6. The rail freezing joint according to claim 1, characterized in that: The bolt (5) is passed through the bolt hole (4) of the clamping plate (1) and the through hole at the end of the rail and then screwed with the nut to fix the rail freezing joint to the rail, thereby fixing the two rails; The reinforcing rib (11) is located below the bolt hole (4).

7. The rail freezing joint according to claim 6, characterized in that: The bolt hole (4) passes through the groove (2) and the resistance plate (3); On the clamping plate (1), on the surface opposite to the groove (2), a boss (6) protruding outward is provided around the bolt hole (4), and the boss is used to increase the strength of the bolt hole on the clamping plate (1) to prevent the clamping plate (1) from being damaged when the bolt (5) is pre-tightened; The height dimension of the boss (6) is 5 mm.

8. The rail freezing joint according to claim 6, characterized in that: The washer is a double-stacked self-locking washer, which is arranged between the nut and the washer. The double-stacked self-locking washer is arranged to protect the clamping plate (1) and prevent the bolt (5) from loosening. The double-stacked self-locking washer is a DIN25201 double-disc self-locking anti-loosening washer.

9. The rail freezing joint according to claim 6, characterized in that: When the bolts (5) are pre-tightened, the resistance plate (3) and the clamping plate (1) are in contact with the rail waist of the steel rail, that is, the resistance plate (3) is completely pressed into the groove (2) by the pre-tightening bolts (5), and while the front surface of the resistance plate (3) is in full contact with the rail waist, the slotted surface of the clamping plate (1) can also be in full contact with the rail waist.

10. The rail freezing joint according to claim 6, characterized in that: When the bolt (5) is pre-tightened, the contour curvature of the upper surface (7) of the clamping plate and the contour curvature of the connection between the rail head and the rail waist are closely attached to each other; When the bolt (5) is pre-tightened, the contour curvature of the lower surface (8) of the clamping plate and the contour curvature of the connection between the rail bottom and the rail waist are closely attached to each other; The surface roughness of the upper surface (7) and the lower surface (8) of the clamping plate is Ra25-Ra50.

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