Split type concrete sleeper

Abstract

The utility model discloses a split type concrete sleeper relates to concrete sleeper technical field, this split type concrete sleeper, including mutually independent pillow block one and pillow block two, the bottom of pillow block one and pillow block two all has embedded steel framework, is embedded in the inside of one side of pillow block one near the connecting end and has the threaded tube sleeve no.

Description

Technical Field

[0001] This utility model relates to the field of concrete sleeper technology, and in particular to a split-type concrete sleeper. Background Technology

[0002] In railway track engineering, concrete sleepers are widely used in ballasted and ballastless track systems as key components that support rails and transmit loads.

[0003] Traditional monolithic concrete sleepers have high strength and durability, but they also have problems such as inconvenient transportation, poor installation flexibility, and the need to replace the whole structure after partial damage. Especially in tunnels, bridges, or sections with limited maintenance space, construction is difficult and maintenance costs are high. In recent years, although double-block sleepers have made some structural improvements, their connecting steel bars are usually pre-embedded as a whole and are not detachable, making it difficult to achieve modular transportation and rapid replacement.

[0004] In addition, most of the existing sleeper connection parts are cast in one piece and cannot be disassembled on site. Once the connection area cracks or the steel bars rust, repairs become extremely difficult. Utility Model Content

[0005] This utility model provides a split concrete sleeper, including two independent sleeper blocks, namely, a first sleeper block and a second sleeper block. Both sleeper blocks have a pre-embedded steel reinforcement frame at their bottoms. A threaded sleeve is pre-embedded inside the first sleeper block near the connecting end. A split connecting mechanism is internally threaded into the first threaded sleeve. A pair of steel pipes are horizontally inserted into the first threaded sleeve and extend into the split connecting mechanism to enhance the shear strength and anchorage of the connection. The other end of the split connecting mechanism is fixedly connected to the corresponding side of the second sleeper block, achieving a detachable rigid connection between the first sleeper block and the second sleeper block.

[0006] Preferably, the split connection mechanism includes a docking block, a metal screw is rotatably connected to one side of the docking block, one end of the metal screw is threadedly engaged with a threaded sleeve pre-embedded in the first pillow block, and a protrusion is provided on the other side of the docking block, which is inserted into a groove on the corresponding side of the second pillow block.

[0007] Preferably, a limiting block is fixed at one end of the steel pipe. After the steel pipe passes through the connecting block, its other end is threadedly connected to a conical nut. The limiting block abuts against the outer wall of the connecting block for axial limiting. The conical nut is inserted into the positioning groove opened on the corresponding side of the second pillow block to form a guiding and positioning structure for the end of the steel pipe.

[0008] Preferably, a threaded sleeve II is pre-embedded inside the protrusion, and a connecting post I is threadedly connected inside the threaded sleeve II. Threaded holes are symmetrically opened on the upper part of the mating block, and connecting posts II are threadedly connected inside the threaded holes. Connecting posts I and II are respectively inserted into extension holes I and II opened on the corresponding sides of the pillow block II.

[0009] Preferably, the upper end face of the second pillow block is provided with a strip groove, a pad is embedded in the strip groove, and several fixing bolts pass through the pad and through extension hole one and extension hole two respectively, pressing and fixing the first connecting post and the second connecting post into the second pillow block.

[0010] Preferably, the inner wall of the groove is provided with an elastic sealing strip, which is arranged circumferentially along the groove. When the protrusion is fully inserted, the elastic sealing strip is compressed and fits tightly against the outer wall of the protrusion.

[0011] Preferably, the lower end of the reinforcing steel skeleton of the second pillow block is provided with a plug, and the free end of the reinforcing steel skeleton on the lower side of the pillow block is inserted into the plug.

[0012] This utility model provides a split-type concrete sleeper, which, compared with the prior art, has the following advantages: This utility model divides the sleeper into sleeper block one and sleeper block two, and adopts a detachable connection structure, which facilitates transportation, installation and partial replacement. The main connection is achieved by the cooperation of the metal screw and the threaded tube sleeve one. The protrusion and groove are inserted to ensure quick positioning. The steel pipe passes through the connecting block and is anchored by the conical nut to enhance shear resistance and anchoring strength. The connecting column one and connecting column two cooperate with the extension hole, and are pressed together with the pad and fixing bolt to improve the connection stability. The steel reinforcement skeleton of the two sleeper blocks is connected by plug to ensure the continuity of force. The overall structure is reliable, easy to assemble and disassemble, and has both high strength and long service life. It is suitable for track laying and maintenance under complex working conditions. Attached Figure Description

[0013] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model; Figure 2 This is a cross-sectional view of the overall structure of an embodiment of the present utility model; Figure 3 This is a schematic diagram showing the overall structure of an embodiment of the present utility model. Figure 4 This is a schematic diagram showing the disassembled structure of the split connection mechanism and other components according to an embodiment of the present utility model; Figure 5 This is a schematic diagram of the secondary structure of the pillow block according to an embodiment of the present utility model; Figure 6 This is a schematic diagram of the structure of extension hole one, extension hole two, etc., according to an embodiment of this utility model.

[0015] Figure label: 1. Pillow Block 1; 2. Pillow Block 2; 3. Reinforcing Steel Frame; 4. Steel Pipe; 5. Limiting Block; 7. Threaded Pipe Sleeve 1; 8. Connecting Block; 9. Metal Screw; 10. Protrusion; 11. Threaded Pipe Sleeve 2; 12. Threaded Hole; 13. Connecting Column 1; 14. Connecting Column 2; 15. Tapered Nut; 16. Groove; 17. Elastic Sealing Strip; 18. Plug; 19. Positioning Groove; 20. Extension Hole 1; 21. Extension Hole 2; 22. Pad; 23. Fixing Bolt. Detailed Implementation

[0016] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0017] Please refer to Figures 1-6 This utility model provides a split concrete sleeper, including sleeper block 1 and sleeper block 2, both of which are independently prefabricated reinforced concrete components.

[0018] A steel reinforcement cage 3 is pre-embedded at the bottom of both pillow block 1 and pillow block 2 to enhance the structural strength and bending resistance of individual pillow blocks. The steel reinforcement cage 3 is formed by welding transverse stirrups and distribution bars and is cast integrally into the concrete.

[0019] A threaded sleeve 7 is pre-embedded inside the side of the pillow block 1 near the connection end. The threaded sleeve 7 is set horizontally with an internal thread on its inner wall. A pair of steel pipes 4 are installed transversely inside the threaded sleeve 7 and fixed with the concrete pouring to improve the shear resistance and anchoring strength of the connection area.

[0020] refer to Figure 4 The split connection mechanism includes a docking block 8, which is a metal component. A metal screw 9 is rotatably connected to one side of the metal screw 9. The external thread of the metal screw 9 matches the internal thread of the threaded sleeve 7. When the metal screw 9 is screwed into the threaded sleeve 7, the docking block 8 reaches the length to connect with the pillow block 2.

[0021] On the other side of the docking block 8, there is a protrusion 10. The protrusion 10 is a trapezoidal structure that matches the groove 16 opened on the corresponding side of the second pillow block 2. The two are inserted and matched to realize the positioning and alignment between the two pillow blocks.

[0022] A limiting block 5 is fixedly provided at one end of the steel pipe 4. The limiting block 5 is welded to the end of the steel pipe 4. After the steel pipe 4 passes through the connecting block 8, when its other end is threadedly connected to the conical nut 15, the limiting block 5 abuts against the outer wall of the connecting block 8 to achieve axial limiting. The outer contour of the conical nut 15 is frustoconical, which is inserted and matched with the positioning groove 19 opened on the corresponding side of the pillow block 2 to play a guiding and precise positioning role, while enhancing the anchoring reliability of the steel pipe 4 at the end.

[0023] To further enhance connection stability, a threaded sleeve 11 is pre-embedded inside the protrusion 10. A connecting post 13 is connected to the threaded sleeve 11. Threaded holes 12 are symmetrically opened on the upper part of the mating block 8. A connecting post 14 is connected to the threaded hole 12. Both the connecting post 13 and the connecting post 14 are metal rods with external threads, which are respectively inserted into the extension holes 20 and 21 opened on the corresponding side of the pillow block 2, forming a multi-point anchoring structure.

[0024] To ensure the stability of the connecting column, a strip groove is provided on the upper end face of the second pillow block 2. A pad 22 is embedded in the strip groove. Several fixing bolts 23 pass through the pad 22 and simultaneously pass through the extension hole 1 20 and the extension hole 2 21 to press and fix the first connecting column 13 and the second connecting column 24 into the second pillow block 2 to prevent loosening. The extension hole 1 20 and the extension hole 2 21 are provided with slots for threaded connection with the fixing bolts 23, and the first connecting column 13 and the second connecting column 24 are provided with through holes for the fixing bolts 23 to pass through.

[0025] To improve the sealing and durability of the connection, an elastic sealing strip 17 is provided circumferentially on the inner wall of the groove 16. The elastic sealing strip 17 is made of rubber or polyurethane material. When the protrusion 10 is fully inserted into the groove 16, the elastic sealing strip 17 is compressed and fits tightly against the outer wall of the protrusion 10, effectively preventing rainwater, dust and ballast debris from entering the connection gap and avoiding corrosion and frost damage.

[0026] In addition, to ensure the continuity of force between the two pillow blocks, the end of the steel reinforcement skeleton 3 on the lower side of pillow block 2 is provided with a plug 18. The plug 18 is a metal sleeve or a connector with internal threads. The free end of the steel reinforcement skeleton 3 on the lower side of pillow block 1 is inserted into the plug 18 to realize the mechanical connection of the steel reinforcement inside the two pillow blocks, thereby enhancing the tensile and bending resistance of the overall structure.

[0027] In summary, the working principle of a split concrete sleeper according to this utility model embodiment is as follows: When in use, sleeper block 1 and sleeper block 2 are first transported to the site and placed in predetermined positions. The metal screw 9 is screwed into the threaded sleeve 7 inside sleeper block 1, so that the connecting block 8 can be connected with sleeper block 2, and its protrusion 10 is inserted into the groove 16 of sleeper block 2. At the same time, the steel pipe 4 passes through the connecting block 8, and the conical nut 15 enters the positioning groove 19. Then, the connecting post 13 and connecting post 24 are screwed into the threaded sleeve 21 and threaded hole 12 respectively, and inserted into the corresponding extension hole. Finally, the pad 22 is installed and locked with the fixing bolt 23 to complete the entire connection process.

[0028] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A split-type concrete sleeper, characterized in that: It includes two independent pillow blocks, one (1) and two (2). The bottom of both pillow blocks (1) and two (2) is pre-embedded with steel reinforcement skeletons (3). A threaded sleeve (7) is pre-embedded inside the side of pillow block (1) near the connection end. A split connection mechanism is threaded inside the threaded sleeve (7). A pair of steel pipes (4) are installed horizontally inside the threaded sleeve (7) and extend into the split connection mechanism to enhance the shear resistance and anchorage strength of the connection part. The other end of the split connection mechanism is fixedly connected to the corresponding side of pillow block (2) to realize a detachable rigid connection between pillow block (1) and pillow block (2).

2. The split-type concrete sleeper according to claim 1, characterized in that: The split connection mechanism includes a docking block (8), a metal screw (9) is rotatably connected to one side of the docking block (8), and the external thread of one end of the metal screw (9) is threadedly engaged with the threaded sleeve (7) pre-embedded in the first pillow block (1). A protrusion (10) is provided on the other side of the docking block (8), and the protrusion (10) is inserted into the groove (16) opened on the corresponding side of the second pillow block (2).

3. The split-type concrete sleeper according to claim 2, characterized in that: One end of the steel pipe (4) is fixedly provided with a limiting block (5). After the steel pipe (4) passes through the docking block (8), its other end is threadedly connected to the conical nut (15). The limiting block (5) abuts against the outer wall of the docking block (8) for axial limiting. The conical nut (15) is inserted into the positioning groove (19) opened on the corresponding side of the pillow block (2) to form a guiding and positioning structure for the end of the steel pipe (4).

4. The split-type concrete sleeper according to claim 3, characterized in that: The protrusion (10) has a pre-embedded threaded sleeve two (11), and the threaded sleeve two (11) is threadedly connected to the connecting post one (13). Threaded holes (12) are symmetrically opened on the upper part of the mating block (8), and the threaded holes (12) are threadedly connected to the connecting post two (14). The connecting post one (13) and the connecting post two (14) are respectively inserted into the extension hole one (20) and extension hole two (21) opened on the corresponding side of the pillow block two (2).

5. The split-type concrete sleeper according to claim 4, characterized in that: The upper end face of the second pillow block (2) is provided with a strip groove, and a pad (22) is embedded in the strip groove. Several fixing bolts (23) pass through the pad (22) and pass through the extension hole one (20) and extension hole two (21) respectively, pressing and fixing the connecting column one (13) and the connecting column two (14) into the second pillow block (2).

6. The split-type concrete sleeper according to claim 2, characterized in that: The inner wall of the groove (16) is provided with an elastic sealing strip (17). The elastic sealing strip (17) is arranged around the groove (16). When the protrusion (10) is fully inserted, the elastic sealing strip (17) is compressed and fits tightly against the outer wall of the protrusion (10).

7. The split-type concrete sleeper according to claim 1, characterized in that: The end of the steel reinforcement skeleton (3) on the lower side of the pillow block 2 (2) is provided with a plug (18), and the free end of the steel reinforcement skeleton (3) on the lower side of the pillow block 1 (1) is inserted into the plug (18).

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