A precast concrete switch tie A precast concrete switch tie

Abstract

The utility model provides a kind of precast concrete frog, it is related to concrete frog technical field, the precast concrete frog of the utility model includes at least two segments of end-to-end opposite arrangement frog segment, and the connecting end between frog segment is mutually connected;Several threaded bushings are respectively embedded on the top wall and the two side walls of connecting end, and threaded bushing is provided with thread, connecting plate is provided with the connecting hole corresponding with threaded bushing, and screw is connected with threaded bushing screw thread through corresponding connecting hole, to connect two corresponding connecting ends;The end face of connecting end is provided with positioning hole, and the both ends of positioning rod are placed in corresponding two positioning holes respectively.Segmented precast concrete frog and reliable connecting positioning mechanism solve the problem that existing long, heavy concrete frog is difficult to carry and install, significantly improve construction convenience, efficiency and safety, while ensuring that the overall frog after connection has sufficient strength, stiffness and geometric accuracy.

Description

Technical Field

[0001] This utility model relates to the field of concrete turnout sleeper technology, and more specifically, to a precast concrete turnout sleeper. Background Technology

[0002] Concrete turnout sleepers are key load-bearing components in railway turnout systems. Their core functions are to stably support the track gauge, evenly distribute track loads, and provide a rigid installation foundation for turnout equipment. With the development of high-speed railways and heavy-haul lines, turnout structures are becoming increasingly complex, placing higher demands on the length, structural strength, and geometric precision of turnout sleepers. Especially in large-number turnouts or special track sections, the length of a single turnout sleeper often needs to reach more than 5 meters to meet the continuity requirements of the overall turnout slab.

[0003] However, existing concrete turnout sleepers generally suffer from being long and heavy. This characteristic makes the sleepers difficult to transport and install. Moving long and heavy concrete turnout sleepers requires a significant amount of manpower and resources, often necessitating multiple people working together or using large lifting equipment, resulting in low construction efficiency. Furthermore, in narrow construction sites or complex track environments, the transport and installation process is easily constrained by the site conditions, increasing the difficulty and risk of construction. Utility Model Content

[0004] The purpose of this invention is to address the problems in the prior art by providing a precast concrete turnout sleeper, which is formed by connecting several sleeper sections into a whole sleeper, making transportation and installation easier and more convenient.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] This utility model provides a precast concrete turnout sleeper, comprising at least two turnout sleeper sections arranged end to end opposite each other, wherein the connecting ends of the turnout sleeper sections are connected to each other by a positioning rod and a connecting plate;

[0007] Several threaded sleeves are pre-embedded on the top wall and two side walls of the connecting end, and the threaded sleeves are provided with threads. The connecting plate is provided with connecting holes corresponding to the threaded sleeves. Screws pass through the corresponding connecting holes and are threadedly connected to the threaded sleeves to connect the two corresponding connecting ends.

[0008] The end face of the connecting end is provided with a positioning hole, and the two ends of the positioning rod are respectively placed in the two corresponding positioning holes.

[0009] Optionally, the diameter of the positioning rod is smaller than the diameter of the positioning hole, and the length of the positioning rod is equal to the distance between the bottoms of the two corresponding positioning holes.

[0010] Optionally, the positioning hole has a chamfered edge.

[0011] Optionally, the bottom of the threaded sleeve is provided with a flange, the flange is provided with an anchoring hole, the anchor bolt passes through the anchoring hole and is placed in the fork block, and the outer wall of the threaded sleeve is provided with a plurality of anchor bars, the anchor bars extending obliquely toward the opening side of the threaded sleeve.

[0012] Optionally, a positioning sleeve is provided between the connecting hole and the screw, and a rubber pad is tightly fitted on the outside of the positioning sleeve. There are two rubber pads, which are respectively placed at both ends of the connecting hole. The ends of the rubber pads extend radially outward to form an annular flange to pad both ends of the connecting plate.

[0013] The end of the positioning sleeve near the screw head extends radially outward into an annular flange, and a spring washer is provided between the screw head and the positioning sleeve.

[0014] Optionally, the inside of the fork sleeper is provided with a plurality of reinforcing ribs, which are wavy or spiral in shape.

[0015] The beneficial effects that this utility model can produce include:

[0016] 1) Easy to transport: The precast concrete turnout sleepers are divided into several sections. Compared with the long and heavy integral turnout sleepers, the length and weight of each section are greatly reduced, making them easier to transport without relying on a lot of manpower or large lifting equipment. This greatly improves the convenience and flexibility of the transportation process and reduces the difficulty and risk of construction.

[0017] 2) Precise positioning and convenient installation: The positioning holes and positioning rods set on the connecting end face provide a precise positioning benchmark for the docking of adjacent turnout sleeper sections, ensuring the alignment accuracy of key geometric dimensions such as gauge groove, bolt hole position, and installation plane when connecting turnout sleeper sections; the threaded sleeves pre-embedded in the top and side walls of the connecting end of the turnout sleeper section, as well as the connecting holes and screws on the connecting plate, make the connection operation between each turnout sleeper section simple and easy.

[0018] 3) Good connection stability: The connection method of multiple threaded sleeves and screws on the top wall and two side walls of the connection end can fix the turnout sleeper section from multiple directions. The connection is firm and reliable, ensuring that the overall turnout sleeper will not loosen or shift due to the impact force and vibration generated by the train during use.

[0019] 4) Strong adaptability: The segmented precast concrete turnout sleepers have strong flexibility and adaptability. Under different railway line conditions and turnout structure requirements, the number and combination of turnout sleeper segments can be adjusted according to actual needs to adapt to different lengths, shapes and other requirements, and meet the use of complex working conditions such as large number turnouts or special line sections. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is one of the structural schematic diagrams of a precast concrete turnout sleeper provided in the embodiments of this application;

[0022] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0023] Figure 3 This is a second schematic diagram of a precast concrete turnout sleeper provided in an embodiment of this application;

[0024] Figure 4 This is the third structural schematic diagram of a precast concrete turnout sleeper provided in the embodiments of this application.

[0025] Icons: 1. Connecting end; 11. Positioning hole; 2. Positioning rod; 3. Threaded sleeve; 31. Anchor bar; 32. Flange; 4. Screw; 41. Screw head; 42. Rubber gasket; 43. Positioning sleeve; 44. Spring washer; 5. Connecting plate. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of this application. It should be noted that, without conflict, the various features in the embodiments of this application can be combined with each other, and the combined embodiments are still within the protection scope of this application.

[0027] like Figure 1 and Figure 4As shown, the precast concrete turnout sleeper provided in Embodiment 1 of this application includes at least two sleeper sections arranged end-to-end. The connecting ends 1 of the sleeper sections are connected to each other by positioning rods 2 and connecting plates 5. Several threaded sleeves 3 are pre-embedded on the top wall and two side walls of the connecting end 1, and the threaded sleeves 3 are provided with threads. The connecting plate 5 is provided with connecting holes corresponding to the threaded sleeves 3. Screws 4 pass through the corresponding connecting holes and are threadedly connected to the threaded sleeves 3 to connect the two corresponding connecting ends 1. The end face of the connecting end 1 is provided with positioning holes 11, and the two ends of the positioning rods 2 are respectively placed in the two corresponding positioning holes 11. This reduces the weight and length of a single concrete turnout sleeper, greatly facilitating handling, transportation and on-site installation. Especially in narrow or complex terrain areas, large hoisting equipment is not required, saving manpower and resources, and improving construction efficiency and safety. By using the pre-embedded threaded sleeve 3, connecting plate 5, screw 4, positioning hole 11, and positioning rod 2, it is ensured that each turnout sleeper section can be quickly, accurately, and firmly connected end to end into a whole, forming a continuous load-bearing structure with sufficient strength and rigidity, meeting the high requirements of railway turnouts for geometric accuracy and load-bearing capacity.

[0028] like Figure 3 As shown, the diameter of the positioning rod 2 is smaller than the diameter of the positioning hole 11, facilitating its smooth insertion into the hole and enabling rapid positioning of the turnout sleeper section. The length of the positioning rod 2 is equal to the distance between the bottoms of the two corresponding positioning holes 11, ensuring accurate positioning of the turnout sleeper section. The edges of the positioning hole 11 are chamfered to guide the positioning rod 2 during insertion, making it easier for the rod to enter accurately and further improving positioning efficiency and connection reliability. This also prevents wear on the positioning rod 2 or accidental injury to construction personnel due to excessively sharp edges of the hole 11.

[0029] Specifically, the bottom of the threaded sleeve 3 is provided with a flange 32, and the flange 32 is provided with anchoring holes. The anchor bolt passes through the anchoring holes and is placed inside the turnout sleeper, providing strong resistance to pull-out. Several anchor bars 31 are provided on the outer wall of the threaded sleeve 3. The anchor bars 31 extend obliquely towards the opening side of the threaded sleeve 3, increasing the contact area with the concrete and the mechanical interlocking force, forming an efficient "barb" effect, and improving the anchoring strength of the threaded sleeve 3 inside the concrete turnout sleeper section. It effectively resists the pull-out force and shear force generated by the screw 4 on the sleeve when the turnout sleeper is subjected to train loads (especially lateral forces, impact forces, and vibrations), preventing the sleeve from loosening, pulling out, or local damage to the concrete, thereby ensuring the durability of the connection node and the structural integrity under long-term service.

[0030] like Figure 2As shown, a positioning sleeve 43 is provided between the connecting hole and the screw 4. A rubber pad 42 is tightly fitted on the outside of the positioning sleeve 43. There are two rubber pads 42, which are placed at both ends of the connecting hole. The ends of the rubber pads 42 extend radially outward as annular flanges to pad the ends of the connecting plate 5. The positioning sleeve 43 isolates the screw 4 from the direct friction with the connecting hole, protects the hole wall, and helps to evenly transmit the clamping force. At the same time, it plays a role in shock absorption, reducing the impact of vibration generated by train operation on the connecting structure and extending the service life of the connecting parts. The end of the positioning sleeve 43 near the screw head 41 extends radially outward as annular flange. A spring washer 44 is provided between the screw head 41 and the positioning sleeve 43 to prevent the screw 4 from loosening during vibration.

[0031] Specifically, the turnout sleeper has multiple reinforcing ribs inside, which are wavy or spiral in shape. These ribs enhance the bond and adhesion with the concrete, improve the structural strength and load-bearing capacity of the turnout sleeper, and enhance its ability to resist train loads and the installation pressure of turnout equipment. At the same time, they improve the turnout sleeper's resistance to bending and shearing, ensuring the stability and durability of the turnout sleeper during long-term use.

[0032] The installation process of the precast concrete turnout sleeper provided in this application embodiment is as follows: 1) Transport at least two precast turnout sleeper sections arranged end to end to the installation site, and check whether the pre-embedded threaded sleeves 3, positioning holes 11 and other components at the connection end 1 of each turnout sleeper section are intact. At the same time, prepare the necessary accessories for installation such as connecting plate 5, screws 4, positioning rods 2, rubber gaskets 42, spring washers 44, and anchor bolts; 2) Use the positioning holes 11 and positioning rods 2 for preliminary positioning. Insert the two ends of the positioning rods 2 into the positioning holes 11 on the end faces of the corresponding two turnout sleeper section connection ends 1 respectively. Since the edge of the positioning hole 11 has a chamfer, it is easy to insert the positioning rods 2 smoothly, realizing the rapid positioning of the turnout sleeper section. At the same time, the length of the positioning rods 2 is equal to the distance between the bottoms of the corresponding two positioning holes 11, which can ensure the accurate positioning of the turnout sleeper section connection; 3) Place the connecting plate 5 between the two corresponding connection ends 1, so that the connecting hole on the connecting plate 5 is aligned with the threaded sleeve 3, and ensure that the screws 4 can pass through the connecting hole smoothly and be threadedly connected to the threaded sleeve 3. A positioning sleeve 43 with a rubber gasket 42 and a spring washer 44 is installed between the connecting hole and the screw 4. The positioning sleeve 43 is placed into the connecting hole, and the rubber gasket 42, which is fastened on the outside, is placed at both ends of the connecting hole. The annular flange of the rubber gasket 42 is placed at both ends of the connecting plate 5. Then, the screw 4 is passed through the positioning sleeve 43. A spring washer 44 is placed between the annular flange at the end of the positioning sleeve 43 near the screw head 41 and the screw head 41. Then, the screw 4 is screwed into the threaded sleeve 3. Through the threaded connection between the screw 4 and the threaded sleeve 3, the two corresponding connecting ends 1 are tightly connected together, and the connection between the turnout sleeper sections is completed.

[0033] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A precast concrete frog, characterized by, It includes at least two end-to-end opposing turnout sleeper sections, and the connecting ends (1) of the turnout sleeper sections are connected to each other by a positioning rod (2) and a connecting plate (5); Several threaded sleeves (3) are pre-embedded on the top wall and two side walls of the connecting end (1). The threaded sleeves (3) are threaded. The connecting plate (5) is provided with connecting holes corresponding to the threaded sleeves (3). The screws (4) pass through the corresponding connecting holes and are threadedly connected to the threaded sleeves (3) to connect the two corresponding connecting ends (1). The end face of the connecting end (1) is provided with a positioning hole (11), and the two ends of the positioning rod (2) are respectively placed in the two corresponding positioning holes (11).

2. The precast concrete switch tie tie as defined in claim 1 wherein, The diameter of the positioning rod (2) is smaller than the diameter of the positioning hole (11), and the length of the positioning rod (2) is equal to the distance between the bottoms of the two corresponding positioning holes (11).

3. The precast concrete switch tie tie as defined in claim 1 wherein, The positioning hole (11) has a chamfered edge.

4. The precast concrete turnout sleeper according to claim 1, characterized in that, The bottom of the threaded sleeve (3) is provided with a flange (32), and the flange (32) is provided with an anchoring hole. The anchor bolt passes through the anchoring hole and is placed in the fork. The outer wall of the threaded sleeve (3) is provided with a number of anchor bars (31), and the anchor bars (31) extend obliquely toward the opening side of the threaded sleeve (3).

5. The precast concrete turnout sleeper according to claim 1, characterized in that, A positioning sleeve (43) is provided between the connecting hole and the screw (4). A rubber pad (42) is tightly fitted on the outside of the positioning sleeve (43). There are two rubber pads (42), which are respectively placed at both ends of the connecting hole. The ends of the rubber pads (42) extend radially outward to form an annular flange to pad both ends of the connecting plate (5). The end of the positioning sleeve (43) near the screw head (41) extends radially outward into an annular flange, and a spring washer (44) is provided between the screw head (41) and the positioning sleeve (43).

6. The precast concrete turnout sleeper according to claim 1, characterized in that, The inside of the fork sleeper is provided with a plurality of reinforcing ribs, which are wavy or spiral in shape.

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