A high rail sleeper manufacturing reinforcing bar initial tension transition structure

Abstract

The utility model provides a kind of steel bar initial tensioning transition structure for high turnout sleeper manufacturing, it is related to steel bar tensioning technical field;First, the one end of a steel bar laid in high turnout sleeper pouring model is successively threaded through the through hole on hammer and the perforation on circular tube, then the open end of circular tube is butt-jointed with single-hole anchorage device, after butt-joint, the front end of tensioning machine is threaded through steel bar and is close to top on circular tube in arc slot, after preparation, only need to hold hammer handle end with one hand and make hammer handle reciprocate in gap to make the hammer head of hammer repeatedly knock the clamping piece in single-hole anchorage device to avoid clamping piece being taken out, after tensioning and releasing the locking of the steel bar, again through hammer to knock deeply to make clamping piece completely enter anchorage device, and then subsequent release locking, tensioning force value meets the requirement, and tensioning effect is better, and tensioning force value imbalance phenomenon caused by original spring piece rebound rate slower does not appear.

Description

Technical Field

[0001] This utility model relates to the field of steel bar tensioning technology, and more specifically, to a transitional structure for initial tensioning of steel bars used in the manufacture of high-speed rail sleepers. Background Technology

[0002] Currently, before casting high-speed turnout sleepers, it is necessary to install steel bars into the casting model to make the steel bars and concrete form an integral shape to improve the strength of the turnout sleepers. After the steel bars are installed, a tensioning process is required (pre-stressing is applied to the steel bars so that the concrete component generates pre-compression stress before bearing external loads, thereby offsetting part of the tensile stress during the service stage and significantly improving crack resistance and stiffness). The specific process is to first pre-tension one end, and then tension both sides. Uniform initial tensioning can significantly reduce the stress of the steel bars, thereby significantly reducing the probability of steel bar breakage and prestress failure.

[0003] Currently, after the reinforcing bar emerges from the casting mold, the tensioning machine is driven to move and pass through the reinforcing bar. When the spring plate at the front end of the tensioning machine presses against the clamping plate of the anchor, and the front end of the tensioning machine presses against the anchor, the locking component inside the tensioning machine operates to lock the reinforcing bar. Then, the hydraulic cylinder inside the tensioning machine moves to stretch the reinforcing bar. During the stretching process, the clamping plate moves outward with the reinforcing bar, and is then restricted by the spring plate to prevent it from being pulled out. However, after the tensioning process is completed, the locking component inside the tensioning machine releases the locking of the reinforcing bar, and the reinforcing bar detaches from the spring plate. The spring plate then begins to return to its original length, but at this time, the spring plate's rebound rate is slow, which leads to an imbalance in the tension force (not meeting the preset tension force value), resulting in poor tensioning effect of the reinforcing bar. Utility Model Content

[0004] The purpose of this utility model is to solve the problems mentioned in the background art, and then to propose a steel bar initial tensioning transition structure for manufacturing high-speed turnout sleepers.

[0005] The technical solution adopted by this utility model to solve its technical problem is: A preliminary tensioning transition structure for reinforcing steel bars used in the manufacture of high-speed turnout railway sleepers includes a circular tube, a perforation, an arc groove, a notch, a hammer, and a through hole. One end of the circular tube is open, and the other end is blocked, and the inner diameter of the circular tube is equal to the diameter of the single-hole anchor. The perforation that allows the reinforcing bar to pass through is made on the sealed end of the circular pipe, and the center of the perforation is on the same straight line as the central axis of the circular pipe. An arcuate groove, which allows the front end of the tensioning machine to enter and is adapted to the shape of the front end of the tensioning machine, is opened on the sealing end of the circular tube but does not penetrate the sealing end of the circular tube; The notch is made on the curved surface of the round tube to allow the hammer handle to pass through and reciprocate back and forth along the length of the notch; A through hole is made on the hammerhead of the hammer and allows the reinforcing bar to pass through.

[0006] Furthermore, the circular tube is made of wear-resistant and rust-resistant steel.

[0007] Furthermore, a rubber layer is provided within the notch.

[0008] Furthermore, the width of the notch is smaller than the size of the hammer head.

[0009] Furthermore, a magnetic plate is welded to the curved surface of the circular tube and is attached to it. The magnetic plate is magnetically attracted to the single-hole anchor mounting steel plate, and the attraction surface of the magnetic plate is flush with the cross-section of the open end of the circular tube.

[0010] Furthermore, the diameters of the perforations and through holes are adapted to the diameter of the reinforcing bars.

[0011] Compared with the prior art, the beneficial effects of this utility model are: Compared to existing technologies, this application first inserts one end of a steel bar placed in the casting model of the high-speed turnout sleeper through a through hole on a hammer and then through a hole on a round tube. The open end of the round tube is then connected to a single-hole anchor. After the connection is completed, the front end of the tensioning machine passes through the steel bar and approaches the curved groove to press against the round tube. Once the preparation is complete, one hand is needed to hold the end of the hammer handle and move the hammer handle back and forth in the notch to allow the hammer head to repeatedly strike the wedge in the single-hole anchor to prevent the wedge from being pulled out. Before the tensioning is completed and the locking of the steel bar is released, the hammer is struck deeply again to ensure that the wedge is fully inserted into the anchor. As a result, the tension force value meets the requirements after the locking is released, and the tensioning effect is better. The imbalance of tension force value caused by the slow rebound rate of the spring sheet will not occur. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the inside of a circular tube; Figure 3 This is a schematic diagram of the rubber layer installation; Figure 4 This is a schematic diagram illustrating the fit between the hammer and the notch. Figure 5 This is a schematic diagram of a through hole; Figure label: 1. Round tube; 2. Perforation; 3. Curved groove; 4. Notch; 5. Rubber layer; 6. Magnetic plate; 7. Hammer; 8. Through hole. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model. The present utility model will be further described with reference to the accompanying drawings and embodiments: like Figure 1 and Figure 2 As shown, a preliminary tensioning transition structure for reinforcing bars used in the manufacture of high-speed turnout sleepers includes a tensioning machine and a single-hole anchorage (both are prior art and are not shown in the figure; the single-hole anchorage has a wedge inside, and one end of the reinforcing bar placed inside the casting mold extends to the outside through the wedge inside the single-hole anchorage fixed on the steel plates on both sides of the casting mold). The significance of a single-hole anchor is as follows: (1) As a permanent anchoring device in prestressed concrete, the single-hole anchor transmits the tension of the prestressing tendon to the interior of the concrete, realizing stress synergy between the steel and the concrete, and making the two form a composite stress body; (2) Single-hole anchorages fix the position of the prestressing tendons to prevent them from sliding or retracting under load.

[0014] It also includes a round tube 1 (made of wear-resistant and rust-resistant steel), a perforation 2, an arc groove 3, a notch 4, a hammer 7 (including a hammer head and a hammer handle), and a through hole 8. One end of the circular tube 1 is open, and the other end is blocked, and the inner diameter of the circular tube 1 is equal to the diameter of the single-hole anchor. The through hole 2, which allows the reinforcing bar to pass through, is opened on the sealing end of the circular pipe 1, and the center of the through hole 2 is on the same straight line as the central axis of the circular pipe 1 (the diameter of the through hole 2 is adapted to the diameter of the reinforcing bar). An arcuate groove 3, which allows the front end of the tensioning machine to enter and is adapted to the shape of the front end of the tensioning machine, is opened on the sealing end of the circular tube 1 but does not penetrate the sealing end of the circular tube 1; The notch 4 is opened on the arc surface of the circular tube 1 to allow the hammer handle of the hammer 7 to pass through and reciprocate along the length of the notch 4 (specifically, the width of the notch 4 is smaller than the size of the hammer head of the hammer 7, and the hammer needs to be inserted from the open end of the circular tube 1 and the hammer handle needs to enter along the notch 4 before the circular tube 1 is fitted onto the single-hole anchor). Through hole 8 is made on the hammer head of hammer 7 and allows the reinforcing bar to pass through (the diameter of through hole 8 is adapted to the diameter of the reinforcing bar).

[0015] To reduce the impact wear between the hammer handle and the inner wall of the notch 4 during the subsequent manual reciprocating motion of the hammer 7, further optimizations to the above-described embodiment are made, such as... Figure 3 As shown, a rubber layer 5 is provided inside the notch 4.

[0016] To further improve the stability of the completed mating of the circular tube 1 and the single-hole anchor, the above-described embodiment is further optimized, such as... Figure 3 As shown, a magnetic plate 6 is welded to the curved surface of the circular tube 1 and is attached to it. The magnetic plate 6 is magnetically attracted to the single-hole anchor installation steel plate, and the attraction surface of the magnetic plate 6 is aligned and flat with the cross-section of the open end of the circular tube 1.

[0017] The working process of this utility model: First, hammer 7 is inserted from the open end of the circular tube 1. At this time, the handle of hammer 7 moves along the notch 4. Then, the reinforcing bar is passed through the through hole 8 and the through hole 2 on hammer 7 in sequence. Then, the circular tube 1 is installed on the single-hole anchor. During installation, the inner wall of the circular tube 1 is tightly fitted with the outer wall of the single-hole anchor and can completely cover the single-hole anchor. When the front adsorption surface of the magnetic plate comes into contact with the single-hole anchor installation steel plate, an adsorption force is generated, thereby limiting the position of the circular tube 1. Finally, the tensioning machine is moved so that the front end just enters the arc groove 3 and the circular tube 1 is pressed tightly against the single-hole anchor installation steel plate. Then, the tensioning is started. The machine can then tension the steel bars. During the tensioning process, neither the front end of the tensioning machine nor the round tube 1 will move. At this time, one hand is needed to hold the end of the hammer handle and make the hammer handle move back and forth in the notch 4 so that the hammer head of the hammer 7 can repeatedly strike the wedge in the single-hole anchorage to prevent the wedge from being pulled out. Before the tensioning is completed and the locking of the steel bar is released, the hammer 7 is used to strike it deeply again so that the wedge is completely inserted into the anchorage. Then, after the locking is released, the tension force value meets the requirements, the tensioning effect is better, and the tension force value imbalance caused by the slow rebound rate of the spring plate will not occur. After the initial tensioning of a steel bar is completed, the tensioning machine is first moved back so that its front end is detached from the steel bar. Then, the round pipe 1 is separated from the single-hole anchor and detached from the steel bar. Then, a new steel bar is replaced to start a new round of initial tensioning process.

[0018] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A steel reinforcement initial tensioning transition structure for manufacturing high-speed turnout sleepers, characterized in that, It includes a round tube (1), a perforation (2), an arc groove (3), a notch (4), a hammer (7), and a through hole (8). One end of the circular tube (1) is open and the other end is blocked, and the inner diameter of the circular tube (1) is equal to the diameter of the single-hole anchor. The perforation (2) that allows the reinforcing bar to pass through is opened on the sealing end of the circular pipe (1), and the center of the perforation (2) is on the same straight line as the central axis of the circular pipe (1); An arcuate groove (3) that allows the front end of the tensioning machine to enter and is adapted to the shape of the front end of the tensioning machine is opened on the sealing end of the circular tube (1) but does not penetrate the sealing end of the circular tube (1); The notch (4) is opened on the arc surface of the round tube (1) to allow the hammer handle of the hammer (7) to pass through and reciprocate along the length of the notch (4); A through hole (8) is made on the hammer head of the hammer (7) and allows the reinforcing bar to pass through.

2. The initial tensioning transition structure for reinforcing bars used in the manufacture of high-speed turnout sleepers according to claim 1, characterized in that, The circular tube (1) is made of wear-resistant and rust-resistant steel.

3. The initial tensioning transition structure for reinforcing steel bars used in the manufacture of high-speed turnout sleepers according to claim 1, characterized in that, A rubber layer (5) is provided inside the notch (4).

4. The initial tensioning transition structure for reinforcing steel bars used in the manufacture of high-speed turnout sleepers according to claim 1, characterized in that, The width of the notch (4) is smaller than the size of the hammer head of the hammer (7).

5. The initial tensioning transition structure for reinforcing bars used in the manufacture of high-speed turnout sleepers according to claim 1, characterized in that, A magnetic plate (6) is welded to the arc surface of the circular tube (1) and is attached to it. The magnetic plate (6) is magnetically attracted to the single-hole anchor installation steel plate, and the attraction surface of the magnetic plate (6) is flush with the cross-section of the open end of the circular tube (1).

6. The initial tensioning transition structure for reinforcing bars used in the manufacture of high-speed turnout sleepers according to claim 1, characterized in that, The diameters of the perforation (2) and the through hole (8) are both adapted to the diameter of the reinforcing bar.

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