Turnout tie and h-steel fixing structure

Abstract

The utility model provides a kind of fixed structure of frog and H-shaped steel, including fixed batten, U bolt, two elastic top tight pieces and two locking nuts, fixed batten is used to set in the top of frog, two through holes being set respectively close to the both ends of fixed batten are provided on fixed batten, the top of fixed batten is equipped with two placing sleeves;U bolt is embraced in the outer periphery of frog and H-shaped steel with fixed batten cooperation, U bolt has two upwards bending extension bending parts, two bending parts are respectively set through two placing sleeves;Two elastic top tight pieces are respectively set in two placing sleeves, and are respectively set on the outer periphery of the upper portion of two bending parts;Two locking nuts are respectively set on the outer periphery of the upper portion of two bending parts in one-to-one correspondence with thread.The fixed structure of frog and H-shaped steel provided by the utility model not only does not need to embed metal sleeve in frog, avoids the situation that concrete frog cracks, but also can reduce the risk of locking nut loosening, enhances the fixing effect.

Description

Technical Field

[0001] This utility model belongs to the field of turnout sleeper installation technology, and more specifically, it relates to a turnout sleeper and H-beam fixing structure. Background Technology

[0002] Turnout sleepers are special sleepers used on railway turnouts, mainly at the turnout traction point. They allow the turnout electrical switching rods to be placed inside the sleeper, which is beneficial for large-scale maintenance operations. H-beams are usually placed under the turnout sleeper to distribute the huge concentrated load generated when the train passes through the turnout more evenly over a larger area of ​​the roadbed, preventing the roadbed from being crushed or subsided. At the same time, it connects the scattered turnout sleepers into a stable whole frame, effectively preventing the turnout sleepers from shifting, deforming or tilting, thus maintaining the precise and stable geometry of the turnout and facilitating subsequent adjustments and maintenance.

[0003] In existing technology, metal sleeves are typically pre-embedded inside the turnout sleeper, with corresponding bolt holes pre-drilled at the top of the H-beam. High-strength bolts are then inserted from the top of the sleeper downwards through the metal sleeves, directly piercing the sleeper and the pre-drilled holes in the H-beam. Finally, nuts are tightened at the bottom of the H-beam for fixation. However, if the metal sleeves pre-embedded inside the concrete turnout sleeper are not properly sealed, moisture intrusion will cause corrosion and expansion, leading to cracking of the concrete sleeper and reducing its service life. Furthermore, the nuts may loosen under long-term vibration, reducing their fixing effect. Utility Model Content

[0004] This utility model provides a fixing structure for a turnout sleeper and an H-beam, which not only eliminates the need to pre-embed metal sleeves in the turnout sleeper, thus avoiding cracking of the concrete turnout sleeper, but also reduces the risk of the locking nut loosening and enhances the fixing effect.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A fixing structure for a turnout sleeper and an H-beam is provided, including a fixing plate, a U-bolt, two elastic clamping members, and two locking nuts. The fixing plate is used to be installed on the top of the turnout sleeper. Two through holes are respectively provided near both ends of the fixing plate. Two mounting sleeves are provided on the top of the fixing plate, with each mounting sleeve corresponding to one of the two through holes. The U-bolt, in conjunction with the fixing plate, hugs the outer periphery of the turnout sleeper and the H-beam. The U-bolt has two upwardly bent portions, each extending through one of the mounting sleeves. The two elastic clamping members are respectively installed inside the two mounting sleeves and fitted onto the upper outer periphery of the two bent portions. The two locking nuts are threaded onto the upper outer periphery of the two bent portions, respectively, for rotating and compressing the elastic clamping members.

[0006] In one possible implementation, the outer periphery of the mounting sleeve is provided with a protective cap, the protective cap is provided on the upper outer periphery of the elastic clamping member, the bent part is provided through the top wall of the protective cap, and the locking nut is located above the protective cap.

[0007] In some embodiments, a waterproof sleeve coaxially disposed with the protective cap is connected to the inner top wall of the protective cap, the waterproof sleeve is disposed through a through hole, and an elastic clamping member is located between the protective cap and the waterproof sleeve.

[0008] In some embodiments, the outer peripheral wall of the housing sleeve is provided with an axially extending positioning groove, and the inner peripheral wall of the protective cap is provided with a positioning strip located in the positioning groove, which is used to restrict the relative rotation of the protective cap and the housing sleeve.

[0009] In some embodiments, a washer is provided between the protective cap and the locking nut.

[0010] In one possible implementation, a reinforcing strip extending along the length of the fixing strip is connected to the top wall of the fixing strip.

[0011] In some embodiments, there are two reinforcing strips, which are respectively located near the two side edges of the fixed strip.

[0012] In some embodiments, a water passage hole is provided through the middle of the reinforcing strip.

[0013] In one possible implementation, a PTFE strip is provided between the locking nut and the bend.

[0014] The turnout sleeper and H-beam fixing structure provided in this embodiment, compared with the prior art, uses U-bolts to hold the turnout sleeper and H-beam together, and a fixing plate provides top support, forming a rigid constraint. This eliminates the need for pre-embedded metal sleeves inside the turnout sleeper, avoiding cracking of the concrete sleeper. When the locking nut is tightened, the elastic clamping member is compressed and deformed, providing a continuous and adaptive elastic restoring force. This elastic force actively compensates for the preload loss caused by creep, shrinkage, or settlement of the timber, and efficiently absorbs and attenuates the continuous vibration energy generated by train operation, thereby significantly reducing the risk of locking nut loosening and enhancing the fixing effect. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A schematic diagram of the use state of the forklift sleeper and H-beam fixing structure provided in this embodiment of the utility model; Figure 2 A schematic diagram of the fixing structure between the fork sleeper and the H-beam provided in an embodiment of this utility model; Figure 3 A schematic diagram of the disassembly structure of the fork sleeper and H-beam fixing structure provided in this embodiment of the utility model; Figure 4 This is an embodiment of the present utility model. Figure 3 A magnified schematic diagram of the local structure at point I; Figure 5 This is a front sectional view of the fork sleeper and H-beam fixing structure provided in an embodiment of the present utility model. Figure 6 This is an embodiment of the present utility model. Figure 5 A magnified schematic diagram of the local structure at point II; Figure 7 This is an embodiment of the present utility model. Figure 3 A schematic diagram of the structure of the protective cap and waterproof cover.

[0017] The following are the labeling elements in the figure: 1. Forklift sleeper; 2. H-beam; 10. Fixing strip; 11. Installation sleeve; 111. Positioning groove; 112. Annular groove; 12. Reinforcing strip; 121. Water passage hole; 20. U-bolt; 21. Bending part; 30. Elastic clamping part; 40. Locking nut; 50. Protective cap; 51. Positioning strip; 60. Waterproof sleeve; 70. Gasket. Detailed Implementation

[0018] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0019] It should be noted that when an element is referred to as being "set on" another element, it can be directly on the other element or indirectly on the other element. It should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a number" means two or more, unless otherwise explicitly specified.

[0020] Turnout sleepers are special sleepers used on railway turnouts, mainly at the turnout traction point. They allow the turnout electrical switching rods to be placed inside the sleeper, which is beneficial for large-scale maintenance operations. H-beams are usually placed under the turnout sleeper to distribute the huge concentrated load generated when the train passes through the turnout more evenly over a larger area of ​​the roadbed, preventing the roadbed from being crushed or subsided. At the same time, it connects the scattered turnout sleepers into a stable whole frame, effectively preventing the turnout sleepers from shifting, deforming or tilting, thus maintaining the precise and stable geometry of the turnout and facilitating subsequent adjustments and maintenance.

[0021] In existing technology, metal sleeves are typically pre-embedded inside the turnout sleeper, and bolt holes are pre-drilled at corresponding positions on the top of the H-beam. High-strength bolts are then inserted from the top of the sleeper downwards through the metal sleeves, directly piercing through the sleeper and the pre-drilled holes in the H-beam. Finally, nuts are tightened at the bottom of the H-beam for fixation. However, if the metal sleeves pre-embedded inside the concrete turnout sleeper are not properly sealed, moisture intrusion will cause corrosion and expansion, leading to cracking of the concrete sleeper and reducing its service life. Furthermore, the nuts may loosen under the vibration of long-term train operation, reducing the fixing effect.

[0022] Please see Figures 1 to 7The fixing structure of the fork sleeper and H-beam provided by this utility model will now be described. The fixing structure between the turnout sleeper and the H-beam includes a fixing plate 10, U-bolts 20, two elastic clamping members 30, and two locking nuts 40. The fixing plate 10 is used to set on the top of the turnout sleeper 1. The fixing plate 10 has two through holes respectively located near both ends of the fixing plate 10. The top of the fixing plate 10 has two mounting sleeves 11, which are arranged one-to-one with the two through holes. The U-bolts 20 cooperate with the fixing plate 10 to hug the outer periphery of the turnout sleeper 1 and the H-beam 2. The U-bolts 20 have two upwardly bent portions 21, which are respectively set through the two mounting sleeves 11. The two elastic clamping members 30 are respectively set in the two mounting sleeves 11 and are respectively fitted on the upper outer periphery of the two bent portions 21. The two locking nuts 40 are threaded on the upper outer periphery of the two bent portions 21 and are used to rotate and compress the elastic clamping members 30.

[0023] Furthermore, the turnout sleeper and H-beam fixing structure are provided in two on each turnout sleeper 1, and are respectively set close to both ends of the turnout sleeper 1.

[0024] Furthermore, the inner peripheral wall of the mounting sleeve 11 is provided with an annular groove 112 extending upward to the upper end of the mounting sleeve 11, and the elastic clamping member 30 is located in the annular groove 112.

[0025] This application provides a fixing structure for a turnout sleeper and an H-beam. In actual use, a fixing plate 10 is placed on top of the turnout sleeper 1 as a basic load-bearing component, and U-bolts 20 simultaneously hold the turnout sleeper 1 and the H-beam 2 together to form a strong mechanical constraint, effectively resisting the relative displacement and vibration between the two.

[0026] The two through holes and two mounting sleeves 11 (corresponding one-to-one) provided on the fixing plate 10 provide precise positioning and vertical guide channels for the two bent portions 21 of the U-bolt 20. This ensures that the U-bolt 20 is accurately positioned and evenly stressed during installation, avoiding local stress concentration or fastening failure caused by bolt misalignment.

[0027] During long-term use, the timber (usually padded between the sleeper 1 and the H-beam 2) will inevitably undergo creep, shrinkage, or slight settlement, and the metal contact surfaces may also experience wear due to fretting. The compressive deformation of the elastic clamping element 30 provides a continuous elastic restoring force, which can automatically compensate for the loss of preload caused by these factors, ensuring that the bolted connection maintains sufficient clamping force over a long period of time and preventing loosening.

[0028] The railway environment is subject to continuous vibration. The elastic clamping element 30 can effectively absorb and buffer this vibration energy, significantly reducing the amplitude of vibration transmitted to the bolt threads, thereby greatly reducing the risk of the nut loosening due to vibration and improving the vibration resistance and service life of the entire fixing device.

[0029] The locking nut 40 acts directly on the resilient clamping member 30, compressing it by tightening, thus providing an initial, adjustable, and powerful clamping force while securing the resilient clamping member 30 in its working position. This design is simple, reliable, and easy to apply and control the preload.

[0030] The U-bolts 20 engage the turnout sleeper 1 and the H-beam 2, with the fixing plate 10 providing top support, forming a rigid constraint. This eliminates the need for pre-embedded metal sleeves within the turnout sleeper 1, preventing cracking of the concrete turnout sleeper 1. When the locking nut 40 is tightened, the elastic clamping member 30 is compressed and deformed, providing a continuous and adaptive elastic restoring force. This elastic force actively compensates for the preload loss caused by creep, shrinkage, or settlement of the timber, and efficiently absorbs and attenuates the continuous vibration energy generated by train operation, thereby significantly reducing the risk of the locking nut 40 loosening and enhancing the fixing effect.

[0031] The turnout sleeper and H-beam fixing structure provided in this embodiment, compared with the prior art, uses U-bolts 20 to hold the turnout sleeper 1 and H-beam 2 together, and the fixing strip 10 provides top support, forming a rigid constraint. This eliminates the need for pre-embedded metal sleeves in the turnout sleeper 1, avoiding cracking of the concrete turnout sleeper 1. When the locking nut 40 is tightened, the elastic clamping member 30 is compressed and deformed, providing a continuous and adaptive elastic restoring force. This elastic force actively compensates for the pre-tightening force loss caused by creep, shrinkage, or settlement of the timber, and efficiently absorbs and attenuates the continuous vibration energy generated by train operation, thereby significantly reducing the risk of the locking nut 40 loosening and enhancing the fixing effect.

[0032] In one possible implementation, the aforementioned placement sleeve 11 adopts the following... Figures 1 to 3 and Figures 5 to 7 The structure shown is described in the following document. Figures 1 to 3 and Figures 5 to 7 The outer periphery of the mounting sleeve 11 is fitted with a protective cap 50, which covers the upper outer periphery of the elastic clamping member 30. The bent part 21 is installed through the top wall of the protective cap 50, and the locking nut 40 is located above the protective cap 50.

[0033] Specifically, the protective cap 50 forms a protective barrier that can significantly block external pollutants such as rainwater, snow water, dust, and gravel from directly splashing onto or accumulating on the elastic clamping member 30. This helps to slow down the rust, dirt accumulation, and chemical corrosion of the elastic clamping member 30, extending its service life and functional stability.

[0034] The protective cap 50 is slidably fitted around the outer periphery of the mounting sleeve 11. This design facilitates installation and removal (e.g., inspection or replacement of the elastic clamping element 30), while its tight fit with the mounting sleeve 11 also provides a certain degree of sealing and positioning. An opening in the top wall of the protective cap 50 allows the bent portion 21 to pass through, resulting in a simple and effective design.

[0035] In some embodiments, see Figure 3 and Figures 5 to 7 A waterproof sleeve 60 is connected to the inner top wall of the protective cap 50 and is coaxially arranged with the protective cap 50. The waterproof sleeve 60 is provided through a through hole, and the elastic clamping member 30 is located between the protective cap 50 and the waterproof sleeve 60.

[0036] Specifically, a space is formed between the waterproof sleeve 60 and the protective cap 50 to accommodate the resilient clamping member 30. The waterproof sleeve 60 extends downwards and passes through the through-hole of the fixing strip 10. This structure forms a crucial sealing dike. Its core benefit lies in significantly enhancing waterproof sealing performance, particularly against liquids flowing downwards along the bend 21. It effectively isolates the resilient clamping member 30 within the relatively dry space formed by the protective cap 50 and the waterproof sleeve 60, maximizing the prevention of moisture contact and corrosion of the resilient clamping member 30, the root of the bend 21, and the metal surfaces of the through-hole area. This is crucial for improving the structure's durability in harsh environments such as humidity and salt spray.

[0037] In some embodiments, see Figure 3 , Figure 4 and Figure 7 The outer peripheral wall of the mounting sleeve 11 is provided with an axially extending positioning groove 111, and the inner peripheral wall of the protective cap 50 is provided with a positioning strip 51 located in the positioning groove 111, which is used to limit the relative rotation of the protective cap 50 and the mounting sleeve 11.

[0038] Specifically, the axial positioning groove 111 on the outer periphery of the mounting sleeve 11 engages with the positioning strip 51 on the inner wall of the protective cap 50. Its core beneficial effect is to completely lock the circumferential freedom of the protective cap 50 relative to the mounting sleeve 11, preventing relative rotation between the two. This avoids damage to the elastic clamping member 30 due to accidental rotation of the protective cap 50 during the tightening of the locking nut 40.

[0039] In some embodiments, see Figure 3 , Figure 5 and Figure 6 A washer 70 is provided between the protective cap 50 and the locking nut 40.

[0040] Specifically, a shim 70 is added between the top wall of the protective cap 50 and the locking nut 40 to optimize load transfer and provide auxiliary protection: on the one hand, the shim 70 can evenly distribute the concentrated pressure applied by the locking nut 40 to a larger top wall area of ​​the protective cap 50, effectively preventing the protective cap 50 (especially non-metallic materials) from being crushed, deformed or cracked; on the other hand, as an isolation layer, it reduces the direct metal friction between the locking nut 40 and the top wall of the protective cap 50 when rotating, protecting its surface coating or material from scratches.

[0041] In one possible implementation, the aforementioned fixing strip 10 adopts as follows: Figure 1 and Figure 3 The structure shown is described in the following document. Figure 1 and Figure 3 A reinforcing strip 12 extending along the length of the fixing strip 10 is connected to the top wall of the fixing strip 10.

[0042] Specifically, a longitudinal reinforcing strip 12 is added to the top surface of the fixing strip 10 along its length, which significantly improves the bending stiffness and overall structural strength of the fixing strip 10. The reinforcing strip 12 greatly increases the moment of inertia of the section of the fixing strip 10, enabling it to effectively resist the huge clamping force transmitted by the U-bolt 20 and the bending moment generated by the train load, and significantly reduce the bending deformation of the fixing strip 10 itself.

[0043] In some embodiments, see Figures 1 to 4 There are two reinforcing strips 12, which are respectively located near the two side edges of the fixed strip 10.

[0044] Specifically, the two reinforcing strips 12 maximize bending efficiency and enhance torsional stability. Since the reinforcing strips 12 are located at their most effective position farthest from the neutral axis (near the center line of the strip), their contribution to bending stiffness and strength is optimal, providing the strongest resistance to bending under vertical loads. Simultaneously, the double-strip symmetrical structure forms an effect similar to the flange of an "I-beam," greatly enhancing the fixed strip 10's resistance to torsional deformation and effectively preventing warping or buckling in the edge areas. This ensures the strip maintains its overall shape and load-bearing capacity under complex stress, providing a more uniform and stable support foundation for the mounting sleeve 11.

[0045] In some embodiments, see Figures 1 to 3 and Figure 5 A water passage hole 121 is provided through the middle of the reinforcing strip 12.

[0046] Specifically, the water passage 121 provides a direct drainage channel for rainwater and snowmelt water that accumulate on the top surface of the fixed strip 10, which promotes the rapid flow of water away and prevents water from soaking the strip, the bottom of the mounting sleeve 11 and the bolt roots for a long time, thereby reducing the risk of corrosion.

[0047] In one possible implementation, a PTFE strip is provided between the locking nut 40 and the bent portion 21.

[0048] Specifically, PTFE tape, commonly used in existing threaded sealing structures, is not shown in the attached drawings. Wrapping PTFE tape (PTFE sealing tape) around the threaded engagement between the locking nut 40 and the bent portion 21 effectively fills the thread engagement gap, forming a reliable sealing barrier that prevents corrosive media such as moisture, rainwater, and salt spray from penetrating downwards along the thread gap, thus protecting the internal threads. Simultaneously, the PTFE tape increases the friction between the threaded pairs, providing an additional layer of protection against vibration and loosening for the locking nut 40.

[0049] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fixing structure for turnout sleepers and H-beams, characterized in that, include: A fixing plate is used to be installed on the top of the fork sleeper. The fixing plate has two through holes respectively located near both ends of the fixing plate. The top of the fixing plate has two mounting sleeves, and the two mounting sleeves are arranged one-to-one with the two through holes. The U-bolt, in conjunction with the fixing strip, hugs the outer periphery of the fork sleeper and the H-beam. The U-bolt has two upwardly extending bent portions, which respectively pass through the two mounting sleeves. Two elastic clamping members are respectively disposed inside the two mounting sleeves and respectively fitted onto the upper outer periphery of the two bent portions; as well as Two locking nuts are threadedly fitted onto the upper outer periphery of the two bent portions, respectively, for rotating and compressing the elastic clamping member.

2. The forklift sleeper and H-beam fixing structure as described in claim 1, characterized in that, The outer periphery of the mounting sleeve is provided with a protective cap, which covers the upper outer periphery of the elastic clamping member. The bent part is provided through the top wall of the protective cap, and the locking nut is located above the protective cap.

3. The forklift sleeper and H-beam fixing structure as described in claim 2, characterized in that, A waterproof sleeve, coaxially arranged with the protective cap, is connected to the inner top wall of the protective cap. The waterproof sleeve passes through the through hole, and the elastic clamping member is located between the protective cap and the waterproof sleeve.

4. The forklift sleeper and H-beam fixing structure as described in claim 2, characterized in that, The outer peripheral wall of the mounting sleeve is provided with an axially extending positioning groove, and the inner peripheral wall of the protective cap is provided with a positioning strip located in the positioning groove, which is used to restrict the relative rotation of the protective cap and the mounting sleeve.

5. The forklift sleeper and H-beam fixing structure as described in claim 2, characterized in that, A washer is provided between the protective cap and the locking nut.

6. The forklift sleeper and H-beam fixing structure as described in claim 1, characterized in that, A reinforcing strip extending along the length of the fixing strip is connected to the top wall of the fixing strip.

7. The forklift sleeper and H-beam fixing structure as described in claim 6, characterized in that, The reinforcing strip is provided in two parts, and is respectively located near the two side edges of the fixing strip.

8. The forklift sleeper and H-beam fixing structure as described in claim 7, characterized in that, A water passage hole is provided through the middle of the reinforcing strip.

9. The forklift sleeper and H-beam fixing structure as described in claim 1, characterized in that, A PTFE strip is provided between the locking nut and the bent portion.

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