Short model for prestressed concrete sleeper

Abstract

The utility model belongs to the technical field of sleepers, and particularly relates to a short model for a prestressed concrete sleeper, which comprises a bottom plate, fixing plates are mounted on two sides of the upper part of the short edge of the bottom plate, fixing side plates are mounted on two sides of the upper part of the long edge of the bottom plate, and a vertical fixing pull groove is formed in the inner surface of the fixing plate on one side. And an automatic tensioning mechanism is arranged on the fixing plate on the other side. The automatic tensioning mechanism achieves the action of automatically tensioning the steel strand in the concrete sleeper. By arranging the automatic tensioning mechanism, the action of automatically tensioning the steel strand in the concrete sleeper is realized, the labor cost can be reduced by arranging the 1 * 4 short model, the operation can be performed by only two persons, the stress loss of reinforcing steel bars can be reduced, and the consumption of raw materials of the reinforcing steel bars can be reduced.

Description

Technical Field

[0001] This utility model relates to the field of railway sleeper technology, and in particular to a short model for prestressed concrete railway sleepers. Background Technology

[0002] Railway sleeper molds are key tools in the manufacture of railway sleepers and are widely used in the railway construction field. At present, my country has been using the long mold assembly line method for the production and manufacturing of prestressed concrete sleepers. The long mold assembly line method combines multiple precast prestressed concrete molds together to form a continuous assembly line, thereby achieving continuous production and efficient construction.

[0003] Existing prestressed sleeper models are 2*2, 2*4, and 2*5 models. Due to the difficulty in ensuring sufficient bonding force in long steel models, the produced sleepers have low load-bearing capacity and are prone to longitudinal or transverse cracks. They are not suitable for heavy-load and high-speed operation conditions, and the steel bars are wasted, which easily leads to the consumption of raw materials. There is an urgent need for a new model that can overcome the above shortcomings. Utility Model Content

[0004] Based on the existing prestressed sleeper models, which are 2*2, 2*4, and 2*5 connected models, resulting in high steel bar loss and potential material consumption problems, this utility model proposes a short model for prestressed concrete sleepers.

[0005] A short model for prestressed concrete railway sleepers includes a base plate. Fixing plates are installed on the upper two sides of the short side of the base plate, and fixing side plates are installed on the upper two sides of the long side of the base plate. A vertical fixing groove is formed on the inner surface of one fixing plate, and an automatic tensioning mechanism is provided on the other fixing plate. The automatic tensioning mechanism realizes the automatic tensioning of the steel strands inside the concrete sleeper.

[0006] Preferably, a plurality of fixed partitions parallel to the fixed side plates are installed on the upper part of the base plate, and the plurality of fixed partitions are arranged in a linear array on the upper part of the base plate. A plurality of rail groove plates are fixedly installed between every two fixed partitions, and two fixed columns are fixedly installed on the upper part of the rail groove plates.

[0007] The above technical solution involves setting three fixed partitions to form a 1*4 connected model, enabling short-mold casting of the sleeper rail, reducing steel stress loss and steel raw material consumption, and setting rail groove plates and fixed columns to form pre-embedded holes for the sleeper's embedded parts.

[0008] Preferably, the automatic tensioning mechanism includes a plurality of tensioning screws, which pass through and extend out of both sides of the fixed plate. One end of the tensioning screw extending out of the inner side of the fixed plate is connected to a tensioning box. A movable tensioning groove is provided on one side of the tensioning box.

[0009] The above technical solution involves setting a tensioning screw, the rotation of which can drive the tensioning box to move outward to tension the steel strand, and the movable tensioning groove can fix one end of the steel strand to the tensioning box.

[0010] Preferably, one end of the tensioning screw extending beyond the outer side of the fixing plate is threaded and connected to a threaded ring. A threaded sleeve with internal threads is fixed on the fixing plate, and the tensioning screw passes through the threaded sleeve and is rotatably connected to the threaded sleeve.

[0011] The above technical solution enables the rotation of the threaded ring to move the tensioning screw outward or inward, thereby driving the tensioning box to tension the pre-embedded steel strands.

[0012] Preferably, the threaded ring is nested in the center of the gear and rotates with the gear. Each tensioning screw corresponds to one gear, and multiple gears mesh with each other. The outermost gear is connected to the rotating motor.

[0013] Preferably, a drive gear is provided on the rotating shaft connected to the rotating motor, and the drive gear meshes with the outermost gear for transmission.

[0014] The above technical solution involves setting up a rotating motor to drive the rotating shaft to rotate, which in turn drives the active gear to rotate. Multiple passive gears mesh with each other, so that the rotation of the active gear can drive the multiple passive gears to rotate together, causing multiple threaded rings to rotate together, thereby enabling multiple tensioning boxes to tension multiple steel strands simultaneously.

[0015] Preferably, a protective shell is fixedly installed on the outer side of the plurality of gears, one end of the rotating shaft passes through and extends into the interior of the protective shell, and a rotating motor is provided on the outer side of the protective shell. The protective shell is provided to protect the tensioning screw, the driving gear, and the driven gear.

[0016] Preferably, the output end of the rotary motor is fixedly connected to one end of the rotary shaft via a coupling;

[0017] Preferably, lifting lugs are fixedly installed on both sides of the base plate.

[0018] The beneficial effects of this utility model are as follows:

[0019] 1. By setting the automatic tensioning mechanism, the steel strands in the concrete sleeper are automatically tensioned. The 1*4 short model reduces labor costs, requiring only two people to operate. It also reduces steel stress loss and steel raw material consumption, solving the technical problem of excessive steel loss and material consumption caused by existing 2*2, 2*4, and 2*5 prestressed sleeper models.

[0020] 2. By setting up a rotating motor to drive the rotating shaft to rotate, the driving gear will rotate, and multiple driven gears will mesh with each other, so that the rotation of the driving gear can drive the multiple driven gears to rotate together, and the multiple threaded rings will rotate together, so that multiple tensioning boxes can tension multiple steel strands at the same time. A protective shell is set to protect the tensioning screw, driving gear and driven gear. Attached Figure Description

[0021] Figure 1 This is a structural schematic diagram of a short model for a prestressed concrete railway sleeper proposed in this utility model;

[0022] Figure 2 This is a three-dimensional view of the rail groove plate structure of a short model for a prestressed concrete sleeper proposed in this utility model.

[0023] Figure 3 This is a three-dimensional view of the tensioning box structure of a short model for prestressed concrete railway sleepers proposed in this utility model.

[0024] In the diagram: 1. Base plate; 2. Lifting lug; 3. Fixing plate; 4. Fixing side plate; 5. Fixing groove; 6. Fixing partition; 7. Track groove plate; 8. Fixing column; 9. Tensioning screw; 10. Tensioning box; 11. Movable groove; 12. Threaded ring; 13. Protective shell; 14. Rotating shaft; 15. Rotating motor; 16. Driven gear; 17. Driving gear. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0026] Reference Figures 1-3 A short model for prestressed concrete railway sleepers includes a base plate 1. Fixing plates 3 are installed on the upper two sides of the short side of the base plate 1, and fixing side plates 4 are installed on the upper two sides of the long side of the base plate 1. A vertical fixing groove 5 is opened on the inner surface of the fixing plate 3 on one side, and an automatic tensioning mechanism is provided on the fixing plate 3 on the other side.

[0027] Three fixed partitions 6 parallel to the fixed side plate 4 are installed on the upper part of the base plate 1. The three fixed partitions 6 are arranged in a linear array on the upper part of the base plate 1. Multiple rail groove plates 7 are fixedly installed between every two fixed partitions 6. Two fixed columns 8 are fixedly installed on the upper part of the rail groove plates 7.

[0028] By setting three fixed partitions 6, a 1*4 connected model is formed, realizing the short mold casting of the sleeper rail, reducing the stress loss of steel bars and the consumption of steel bar raw materials. The rail groove plate 7 and fixed column 8 are set to form the pre-embedded holes of the sleeper pre-embedded parts.

[0029] The automatic tensioning mechanism includes a plurality of tensioning screws 9, which pass through and extend from both sides of the fixed plate 3. One end of the tensioning screw 9 extending from the inner side of the fixed plate 3 is connected to a tensioning box 10. A movable tensioning groove 11 is provided on one side of the tensioning box 10.

[0030] By setting the tensioning screw 9, the rotation of the tensioning screw 9 can drive the tensioning box 10 to move outward to tension the steel strand. The movable tensioning groove 11 can fix one end of the steel strand to the tensioning box 10.

[0031] The tensioning screw 9 extends outward from the outer side of the fixing plate 3 and has a threaded end connected to a threaded ring 12. A threaded sleeve with internal threads is fixed on the fixing plate, and the tensioning screw (9) passes into the threaded sleeve and is rotatably connected to the threaded sleeve.

[0032] The rotation of the threaded ring 12 enables the tensioning screw 9 to move outward or inward, thereby driving the tensioning box 10 to tension the pre-embedded steel strands.

[0033] The threaded ring 12 is nested in the center of the gear 16 and rotates with the gear 16. Each tensioning screw 9 corresponds to one gear 16, and the four gears 16 mesh with each other. The outermost gear 16 is connected to the rotating motor 15. A drive gear 17 is provided on the rotating shaft 14 connected to the rotating motor 15. The drive gear 17 meshes with the outermost gear 16 for transmission.

[0034] To protect the equipment, a protective shell 13 is fixedly installed on the outside of the four gears 16, one end of the rotating shaft 14 passes through and extends into the interior of the protective shell 13, and a rotating motor 15 is provided on the outside of the protective shell 13.

[0035] By setting a rotating motor 15 to drive the rotating shaft 14 to rotate, the driving gear 17 will rotate, and multiple driven gears 16 will mesh with each other, so that the rotation of the driving gear 17 can drive the multiple driven gears 16 to rotate together, so that the four threaded rings 12 will rotate together, and the four tensioning boxes 10 can tension multiple steel strands at the same time. A protective shell 13 is set to protect the tensioning screw 9, the driving gear 17 and the driven gears 16.

[0036] The output end of the rotating motor 15 is fixedly connected to one end of the rotating shaft 14 via a coupling; lifting lugs 2 are fixedly installed on both sides of the base plate 1.

[0037] Working principle: First, start the rotating motor 15 to drive the drive gear 17 to rotate through the rotating shaft 14, so that the tensioning screw 9 pushes the tensioning box 10 to the appropriate position. Then, fix one end of the steel strand to be pre-embedded in the fixed groove 5 on the fixed plate 3 on one side, and fix the other end in the movable groove 11 on the tensioning box 10. Start the rotating motor 15 again, so that the drive gear 17 drives the driven gear 16 to rotate, so that the tensioning box 10 moves outward and tensions the steel strand. After tensioning, pour concrete into the model separated by the three partition plates. Through the track plate 7 and the fixed column 8, the pre-embedded holes of the pre-embedded parts are formed. After the concrete is formed, cut the steel strand and use the retraction of the steel strand after tensioning to generate prestress.

[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A short model for prestressed concrete sleepers, comprising a base plate (1), characterised in that: The upper part of the short side of the bottom plate (1) is provided with a fixed plate (3), and the upper part of the long side of the bottom plate (1) is provided with a fixed side plate (4).

2. A short model for a prestressed concrete sleeper according to claim 1, characterized in that: A plurality of fixed partition plates (6) parallel to the fixed side plate (4) are arranged on the upper part of the bottom plate (1), and a plurality of rail groove plates (7) are arranged between every two fixed partition plates (6).

3. A short model for a prestressed concrete sleeper according to claim 1 or 2, characterized in that: The automatic tensioning mechanism comprises a plurality of tensioning screws (9), the tensioning screws (9) extend through the two sides of the fixed plate (3), and one end of the tensioning screw (9) extending out of the inner side of the fixed plate (3) is connected with a tensioning box (10).

4. A short model for a prestressed concrete sleeper according to claim 3, characterized in that: The end of the tensioning screw (9) extending out of the outer side of the fixed plate (3) is provided with a thread and is connected with a threaded ring (12).

5. A short model for a prestressed concrete sleeper according to claim 4, characterized in that: The threaded ring (12) is nested in the center of the gear (16) and rotates with the gear (16), each tensioning screw (9) corresponds to a gear (16), a plurality of gears (16) are meshed with each other, and the outermost gear (16) is connected with a rotating motor (15).

6. A short model for a prestressed concrete sleeper according to claim 5, characterized in that: The rotating shaft (14) connected with the rotating motor (15) is provided with a driving gear (17), and the driving gear (17) is meshed with the outermost gear (16) for transmission.

7. A short model for a prestressed concrete sleeper according to claim 6, characterized in that: A plurality of protective shells (13) are fixedly installed on the outer sides of the gears (16), one end of the rotating shaft (14) extends into the interior of the protective shell (13), and the outer side of the protective shell (13) is provided with a rotating motor (15).

8. A short model for a prestressed concrete sleeper according to claim 6, characterized in that: The output end of the rotating motor (15) is fixedly connected with one end of the rotating shaft (14) through a shaft coupling; The fixed plate is fixedly provided with a threaded sleeve with an internal thread, the tensioning screw (9) penetrates into the threaded sleeve and is rotationally connected with the threaded sleeve; One side of the tensioning box (10) is provided with a movable tension groove (11).

9. The short model for a prestressed concrete sleeper according to claim 1, characterized in that: The bottom plate (1) is provided with a lifting lug (2) on each side.

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