Bridge prestress tensioning device and use method

Abstract

The application provides a bridge prestress tension device and a use method, and belongs to the technical field of bridge construction equipment, which comprises a bridge body, a pre-buried channel formed in the bridge body, anchor pads fixedly installed on the left and right end faces of the bridge body and located on the two sides of the pre-buried channel, spiral ribs fixedly installed on the inner side walls of the anchor pads, corrugated channel pipes fixedly installed between the anchor pads on the left and right sides, steel rope strands pre-buried in the inner cavities of the corrugated channel pipes, anchor device plates clamped on the outer side walls of the anchor pads, anchor device clamping pieces clamped and installed in the inner cavities of the anchor device plates, and cooling mechanisms arranged in the inner cavities of the anchor device clamping pieces. The setting of the tensioning mechanism realizes the tensioning function of the steel rope strands pre-buried in the corrugated channel pipes, the setting of the cooling mechanism can cool and radiate the steel rope strands during tensioning, the steel rope strands have good toughness at normal working temperature, and the stable implementation of the tensioning process is ensured.

Description

Technical Field

[0001] This invention relates to the field of bridge construction equipment technology, and more specifically, to a bridge prestressing tensioning device and its usage method. Background Technology

[0002] Prestressing tensioning involves applying tension to a structural member beforehand, causing it to bear compressive stress and thus deform to cope with loads on the structure, including its own weight, wind loads, snow loads, and seismic loads. Commonly used tensioning methods include steel strands, jacks, anchor plates, and clamps. Before a structural member bears external loads, prestress is applied to the steel strands in the tension module to improve the member's bending resistance and stiffness, delay crack initiation, and increase durability. In mechanical structures, this means pre-stressing, which improves structural rigidity, reduces vibration and elastic deformation, and significantly enhances the elastic strength of the tension module, making it more resistant to stress.

[0003] During construction, sensors are needed to measure the applied tension to ensure that the applied prestress meets the specifications. However, as the steel strands are tensioned, the gaps between molecules change, and the strands gradually heat up, reducing their toughness. Further tensioning by machine at this point can easily lead to elongation or even breakage of the steel strands, posing certain drawbacks. Therefore, inventing a bridge prestressing tensioning device and its application method to improve these problems has become a pressing issue for those skilled in the art. Summary of the Invention

[0004] To overcome the above deficiencies, the present invention provides a bridge prestressing tensioning device and its usage method, aiming to improve the problems mentioned in the background art.

[0005] This invention is implemented as follows:

[0006] This invention provides a bridge prestressing tensioning device, comprising a bridge body and a pre-embedded channel on the bridge body. Anchor plates are fixedly installed on both sides of the pre-embedded channel on the left and right end faces of the bridge body. Spiral reinforcements are fixedly installed on the inner sidewalls of the anchor plates. A corrugated channel pipe is fixedly installed between the left and right anchor plates. Steel rope strands are pre-embedded in the inner cavity of the corrugated channel pipe. An anchor plate is snapped onto the outer sidewall of the anchor plate. An anchor clamp is snapped onto the inner cavity of the anchor plate. A cooling mechanism is provided in the inner cavity of the anchor clamp. Tensioning mechanisms are detachably installed on the left and right sidewalls of the bridge body by fasteners.

[0007] Preferably, the spiral reinforcement is fixedly installed on the side wall of the bridge body, the side wall of the corrugated channel pipe is threaded, the steel rope strand is composed of 7 sets of steel wire ropes, and the steel rope strand is connected to the anchor plate and the anchor plate through the connection.

[0008] By adopting the above technical solutions, spiral reinforcement can enhance the tensile strength of concrete load-bearing components.

[0009] Preferably, the anchor clamp has a tapered cross-section, the wire rope is connected to the anchor clamp through it, a positioning seat is fixedly installed on the inner side wall of the anchor clamp, a transmission rod is rotatably installed in the inner cavity of the positioning seat, an abutment rod is fixedly installed in the middle of the side wall of the transmission rod, and torsion springs are wound around both ends of the side wall of the transmission rod.

[0010] By adopting the above technical solution, the contact rod can be kept in constant contact with the surface of the wire rope.

[0011] Preferably, the positioning seats are arranged in an equidistant array around the axis of the anchor clamp, and a total of 6 sets of positioning seats are provided. The two ends of the torsion spring are fixedly connected to the side wall of the transmission rod and the inner wall of the positioning seat, respectively. Under the elastic force of the torsion spring, the abutment rod is in contact with the wire rope. A limiting plate is engaged and installed on the right side wall of the anchor plate. The limiting plate is provided with 7 sets of holes for the wire rope to pass through. The limiting plate is in contact with the anchor clamp.

[0012] By adopting the above technical solution, the limiting plate can ensure that the anchor clamps are displaced during the wire rope tensioning process.

[0013] Preferably, the cooling mechanism includes an air storage cavity formed on the oblique side wall of the anchor clamp and a heat-conducting plate fixedly installed on the oblique side wall of the anchor clamp. A piston plate is slidably installed in the inner cavity of the air storage cavity, and a trigger rod is movably connected to the side wall of the piston plate. An air inlet cavity is formed on the outer side wall of the anchor clamp, and a starter is fixedly installed on the outer side of the inner wall of the air inlet cavity.

[0014] By adopting the above technical solution, it is possible to cool and dissipate heat on the surface of the steel wire during the tensioning process of the steel wire rope.

[0015] Preferably, the left inner cavity of the gas storage chamber is filled with argon gas, the trigger rod is connected through the air inlet chamber, and when the trigger rod contacts the starter, the external blower electrically connected to the starter is started. An opening is provided on the inner side of the inner wall of the air inlet chamber, and an air inlet pipe communicating with the air inlet chamber is fixedly installed on the right side wall of the anchor clamp, and the air inlet pipe is connected to the input end of the external blower.

[0016] Preferably, the tensioning mechanism includes a tensioning cylinder mounted on the side wall of the bridge body by fasteners, and a piston column slidably mounted in the inner cavity of the tensioning cylinder. The wire rope is fixedly mounted on the side wall of the piston column by fasteners. An inlet pipe communicating with the left inner cavity of the tensioning cylinder is fixedly installed on the left side wall of the tensioning cylinder, and an outlet pipe communicating with the right inner cavity of the tensioning cylinder is fixedly installed on the right side wall of the tensioning cylinder.

[0017] By adopting the above technical solution, it is possible to perform tensioning operations on steel rope strands.

[0018] A method for using a bridge prestressing tensioning device includes the following steps: Step 1: The workers thread the steel rope strands into the corrugated channel pipe on the bridge body, and then gradually install the anchor plate, anchor clamp, and limiting plate to fix the tensioning cylinder on the left and right sides of the bridge body. Step 2: Use fasteners to fix the wire rope to the side wall of the piston column. Use an external hydraulic pump to inject hydraulic oil from the inlet pipe, so that the piston column moves to the right side of the inner cavity of the tensioning cylinder, thus achieving the function of tensioning the wire rope. Step 3: When the wire rope is tensioned, the heat generated by the wire rope can be transferred to the air storage chamber through the heat conduction plate. With the cooperation of the cooling mechanism, air can be blown on the surface of the wire rope to achieve the function of cooling down.

[0019] The beneficial effects of this invention are: When the tensioning mechanism tensions the wire rope, as the prestress of the wire rope increases, a large amount of heat is generated on the surface of the wire rope, which is distributed between the anchor clamps and the wire rope. Through the setting of the heat-conducting plate, the heat can be transferred to the argon gas in the gas storage chamber. As the temperature of the argon gas continues to rise, the gaps between molecules in the gas gradually increase and expand, which will cause the piston plate to drive the trigger rod to move into the inner cavity of the air inlet chamber, so that the trigger rod is in contact with the starter. The blower outside the starter works, allowing cold air from the outside to enter the gas storage chamber through the air inlet pipe and spray out from the opening, quickly taking away the heat on the surface of the wire rope. This achieves the function of cooling the wire rope strands, thereby avoiding the wire rope strands from working under high temperature conditions and ensuring the stable implementation of the entire tensioning process of the wire rope strands. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, 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 the present invention 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.

[0021] Figure 1This is a front view of the overall structure of a bridge prestressing tensioning device and its usage method provided by an embodiment of the present invention; Figure 2 This is a partial structural schematic diagram of a bridge prestressing tensioning device and its usage method provided by an embodiment of the present invention; Figure 3 This is a schematic diagram showing the disassembled structure of a bridge prestressing tensioning device and its usage method provided by an embodiment of the present invention; Figure 4 This is a cross-sectional structural diagram of the anchor clamp of a bridge prestressing tensioning device and its usage method provided by an embodiment of the present invention. Figure 5 This is a schematic cross-sectional view of the anchor clamp section of a bridge prestressing tensioning device and its usage method provided by an embodiment of the present invention. Figure 6 This is a cross-sectional view of the tensioning cylinder of a bridge prestressing tensioning device and its usage method provided by an embodiment of the present invention.

[0022] In the diagram: 1. Bridge body; 11. Embedded track; 2. Anchor plate; 21. Spiral reinforcement; 3. Corrugated channel pipe; 4. Steel rope strand; 5. Anchor plate; 6. Anchor clamp; 61. Positioning seat; 62. Transmission rod; 63. Contact rod; 64. Torsion spring; 7. Cooling mechanism; 71. Air storage chamber; 72. Heat conduction plate; 73. Piston plate; 74. Trigger rod; 75. Air inlet chamber; 751. Opening; 76. Starter; 77. Air inlet pipe; 8. Tensioning mechanism; 81. Tensioning cylinder; 82. Piston column; 83. Liquid inlet pipe; 84. Liquid outlet pipe. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example Reference Figure 1-6A bridge prestressing tensioning device includes a bridge body 1 and a pre-embedded channel 11 formed on the bridge body 1. Anchor plates 2 are fixedly installed on both sides of the bridge body 1 at the left and right ends, located on both sides of the pre-embedded channel 11. Spiral reinforcement 21 is fixedly installed on the inner side wall of the anchor plates 2. A corrugated channel pipe 3 is fixedly installed between the left and right anchor plates 2. Steel rope strands 4 are pre-embedded in the inner cavity of the corrugated channel pipe 3. Anchor plates 5 are snapped onto the outer side wall of the anchor plates 2. Anchor clamps 6 are snapped into the inner cavity of the anchor plates 5. A cooling mechanism 7 is provided in the inner cavity of the anchor clamps 6. Tensioning mechanisms 8 are detachably installed on the left and right side walls of the bridge body 1 by fasteners. Furthermore; the spiral reinforcement 21 is fixedly installed on the side wall of the bridge body 1; the corrugated channel pipe 3 has a threaded outer side wall; the steel rope strand 4 consists of 7 sets of steel wire ropes; the steel rope strand 4 is connected to the anchor plate 2 and the anchor plate 5; the anchor clamp 6 has a tapered cross-section; the steel wire rope is connected to the anchor clamp 6; a positioning seat 61 is fixedly installed on the inner side wall of the anchor clamp 6; a transmission rod 62 is rotatably installed in the inner cavity of the positioning seat 61; an abutment rod 63 is fixedly installed in the middle of the side wall of the transmission rod 62; the transmission... Torsion springs 64 are wound around both ends of the side wall of the moving rod 62. The positioning seats 61 are arranged in an equidistant array around the axis of the anchor clamp 6. There are a total of 6 sets of positioning seats 61. The two ends of the torsion springs 64 are fixedly connected to the side wall of the driving rod 62 and the inner wall of the positioning seats 61, respectively. Under the elastic force of the torsion springs 64, the abutting rod 63 is in contact with the wire rope. A limiting plate 51 is engaged and installed on the right side wall of the anchor plate 5. The limiting plate 51 is provided with 7 sets of holes for the wire rope to pass through. The limiting plate 51 is in contact with the anchor clamp 6.

[0025] It should be noted that: when the wire rope is inside the anchor clamp 6, under the elastic force of the torsion spring 64, the abutment rod 63 is in contact with the wire rope and can firmly abut the wire rope. At this time, the wire rope can only slide to the right and cannot slide to the left.

[0026] Furthermore, the cooling mechanism 7 includes an air storage cavity 71 formed on the oblique side wall of the anchor clamp 6, and a heat-conducting plate 72 fixedly installed on the oblique side wall of the anchor clamp 6. A piston plate 73 is slidably installed in the inner cavity of the air storage cavity 71, and a trigger rod 74 is movably connected to the side wall of the piston plate 73. An air inlet cavity 75 is formed on the outer side wall of the anchor clamp 6, and an actuator 76 is fixedly installed on the outer side of the inner wall of the air inlet cavity 75. The left inner cavity of the air storage cavity 71 is filled with argon gas (other active gases may also be used). The expansion coefficient of argon gas at room temperature is 0.52×10^-3 / ℃, and the volume of argon gas increases by 0.52 ml for every 1℃ increase in temperature. The trigger rod 74 is connected through the air inlet chamber 75. When the trigger rod 74 contacts the starter 76, the external blower electrically connected to the starter 76 starts. An opening 751 is opened on the inner side of the inner wall of the air inlet chamber 75. An air inlet pipe 77 communicating with the air inlet chamber 75 is fixedly installed on the right side wall of the anchor clamp 6. The air inlet pipe 77 is connected to the input end of the external blower.

[0027] It should be noted that when the tensioning mechanism 8 tensions the wire rope, as the prestress of the wire rope increases, a large amount of heat will be generated on the surface of the wire rope, which will be distributed between the anchor clamp 6 and the wire rope. Through the setting of the heat conduction plate 72, the heat can be transferred to the argon gas in the gas storage chamber 71. As the temperature of the argon gas continues to rise, the gaps between molecules in the gas gradually increase and expand, which will cause the piston plate 73 to drive the trigger rod 74 to move into the inner cavity of the air inlet chamber 75. As the trigger rod 74 gets closer to the starter 76 and finally fits with it, the starter 76 sends an electrical signal to make the external blower work, which allows the cold air from the outside to enter the gas storage chamber 71 through the air inlet pipe 77 and then spray out from the opening 751, quickly taking away the heat on the surface of the wire rope. This realizes the function of cooling the wire rope strand 4, thereby avoiding its operation under high temperature conditions and ensuring the stable implementation of the entire tensioning process of the wire rope strand 4.

[0028] Furthermore, the tensioning mechanism 8 includes a tensioning cylinder 81 mounted on the side wall of the bridge body 1 by fasteners, and a piston column 82 slidably mounted in the inner cavity of the tensioning cylinder 81. The wire rope is fixedly mounted on the side wall of the piston column 82 by fasteners. An inlet pipe 83 connected to the left inner cavity of the tensioning cylinder 81 is fixedly mounted on the left side wall of the tensioning cylinder 81, and an outlet pipe 84 connected to the right inner cavity of the tensioning cylinder 81 is fixedly mounted on the right side wall of the tensioning cylinder 81.

[0029] The working principle of this type of bridge prestressing tensioning device: Workers threaded the steel cable strand 4 into the corrugated channel pipe 3 on the bridge body 1, and then gradually installed the anchor plate 5, anchor clamp 6, and limiting plate 51, thus fixing the tensioning cylinder 81 to the left and right sides of the side wall of the bridge body 1; Figure 4-5As shown, the wire rope is located in the inner cavity of the anchor clamp 6. Under the elastic force of the torsion spring 64, the abutment rod 63 is in contact with the wire rope and can firmly abut the wire rope. At this time, the wire rope can only slide to the right and cannot slide to the left (the abutment rod 63 squeezes the wire rope). Then, fasteners are used to fix the wire rope to the side wall of the piston column 82. Hydraulic oil is injected from the inlet pipe 83 using an external hydraulic pump, which increases the hydraulic oil capacity on the left side of the inner cavity of the tensioning cylinder 81. At this time, the piston column 82 moves to the right side of the inner cavity of the tensioning cylinder 81, and the hydraulic oil on the right side of the inner cavity of the tensioning cylinder 81 is discharged from the outlet pipe 84. At this time, the entire device realizes the function of tensioning the wire rope. When the prestress of the wire rope reaches a suitable level, the fasteners on the piston column 82 are loosened. Under the limiting constraint of the contact rod 63, the wire rope cannot retract. At this time, the workers can complete the disassembly of the tensioning mechanism 8 and the limiting plate 51, etc., and finally complete the concrete pouring of the pre-embedded hole. When the tensioning mechanism 8 tensions the wire rope, as the prestress of the wire rope increases, a large amount of heat will be generated on the surface of the wire rope, which will be distributed between the anchor clamp 6 and the wire rope. Through the setting of the heat conduction plate 72, the heat can be transferred to the argon gas in the gas storage chamber 71. As the temperature of the argon gas continues to rise, the gaps between molecules in the gas gradually increase and expand, which will cause the piston plate 73 to drive the trigger rod 74 to move into the inner cavity of the air inlet chamber 75. As the trigger rod 74 gets closer to the starter 76 and finally fits with it, the starter 76 sends an electrical signal to make the external blower work, which allows the cold air from the outside to enter the gas storage chamber 71 through the air inlet pipe 77 and then spray out from the opening 751, quickly taking away the heat on the surface of the wire rope. This realizes the function of cooling the wire rope strand 4, thereby avoiding its operation under high temperature conditions and ensuring the stable implementation of the entire tensioning process of the wire rope strand 4.

[0030] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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. Therefore, they should not be construed as limitations on this invention.

[0031] It should be noted that the specific model and specifications of the motor need to be selected and determined based on the actual specifications of the device. The specific selection and calculation method adopts the existing technology in this field, so it will not be described in detail here.

[0032] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the invention by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the invention should be included within the scope of protection of the invention.

Claims

1. A bridge prestressing tensioning device, comprising a bridge body (1) and an embedded channel (11) formed on the bridge body (1), characterized in that, Anchor plates (2) are fixedly installed on both sides of the pre-embedded channel (11) on the left and right end faces of the bridge body (1). Spiral reinforcement (21) is fixedly installed on the inner side wall of the anchor plate (2). Corrugated channel pipe (3) is fixedly installed between the anchor plates (2) on the left and right sides. Steel rope strands (4) are pre-embedded in the inner cavity of the corrugated channel pipe (3). Anchor plates (5) are snapped onto the outer side wall of the anchor plate (2). Anchor clamps (6) are snapped into the inner cavity of the anchor plate (5). A cooling mechanism (7) is provided in the inner cavity of the anchor clamps (6). Tensioning mechanisms (8) are detachably installed on the left and right side walls of the bridge body (1) by fasteners. The cooling mechanism (7) includes an air storage cavity (71) opened on the oblique side wall of the anchor clamp (6) and a heat conduction plate (72) fixedly installed on the oblique side wall of the anchor clamp (6). A piston plate (73) is slidably installed in the inner cavity of the air storage cavity (71). A trigger rod (74) is movably connected to the side wall of the piston plate (73). An air inlet cavity (75) is opened on the outer side wall of the anchor clamp (6). A starter (76) is fixedly installed on the outer side of the inner wall of the air inlet cavity (75). The left inner cavity of the gas storage chamber (71) is filled with argon gas. The trigger rod (74) is connected through the air inlet chamber (75). When the trigger rod (74) contacts the starter (76), the blower electrically connected to the starter (76) starts. An opening (751) is opened on the inner side of the inner wall of the air inlet chamber (75). An air inlet pipe (77) communicating with the air inlet chamber (75) is fixedly installed on the right side wall of the anchor clamp (6). The air inlet pipe (77) is connected to the input end of the external blower.

2. The bridge prestressing tensioning device according to claim 1, characterized in that, The spiral reinforcement (21) is fixedly installed on the side wall of the bridge body (1). The side wall of the corrugated channel pipe (3) is threaded. The steel rope strand (4) is composed of 7 sets of steel wire ropes. The steel rope strand (4) is connected to the anchor plate (2) and the anchor plate (5).

3. A bridge prestressing tensioning device according to claim 2, characterized in that, The cross-section of the anchor clamp (6) is tapered. The wire rope is connected to the anchor clamp (6) through it. A positioning seat (61) is fixedly installed on the inner side wall of the anchor clamp (6). A transmission rod (62) is rotatably installed in the inner cavity of the positioning seat (61). An abutment rod (63) is fixedly installed in the middle of the side wall of the transmission rod (62). Torsion springs (64) are wound around both ends of the side wall of the transmission rod (62).

4. A bridge prestressing tensioning device according to claim 3, characterized in that, The positioning seats (61) are arranged in an equidistant array around the axis of the anchor clamp (6). There are a total of 6 sets of positioning seats (61). The two ends of the torsion spring (64) are fixedly connected to the side wall of the transmission rod (62) and the inner wall of the positioning seat (61), respectively. Under the elastic force of the torsion spring (64), the abutment rod (63) is in contact with the wire rope. The right side wall of the anchor plate (5) is fitted with a limiting plate (51). The limiting plate (51) is provided with 7 sets of holes for the wire rope to pass through. The limiting plate (51) is in contact with the anchor clamp (6).

5. A bridge prestressing tensioning device according to claim 2, characterized in that, The tensioning mechanism (8) includes a tensioning cylinder (81) mounted on the side wall of the bridge body (1) by fasteners, and a piston column (82) slidably mounted in the inner cavity of the tensioning cylinder (81). The wire rope is fixedly mounted on the side wall of the piston column (82) by fasteners. An inlet pipe (83) connected to the inner cavity of the left side of the tensioning cylinder (81) is fixedly mounted on the left side wall of the tensioning cylinder (81), and an outlet pipe (84) connected to the inner cavity of the right side of the tensioning cylinder (81) is fixedly mounted on the right side of the tensioning cylinder (81).

6. A method of using a bridge prestressing tensioning device according to any one of claims 1-5, characterized in that, Includes the following steps: Step 1: The staff inserts the steel rope strand (4) into the corrugated channel pipe (3) on the bridge body (1), and then gradually installs the anchor plate (5), anchor clamp (6), and limiting plate (51) so that the tensioning cylinder (81) is fixedly installed on the left and right sides of the side wall of the bridge body (1). Step 2: Use fasteners to fix the wire rope to the side wall of the piston column (82). Use an external oil pump to inject hydraulic oil from the inlet pipe (83) to move the piston column (82) to the right side of the inner cavity of the tensioning cylinder (81), thus realizing the function of tensioning the wire rope. Step 3: When the wire rope is tensioned, the heat generated by the wire rope can be transferred to the air storage chamber (71) through the heat conduction plate (72). With the cooperation of the cooling mechanism (7), the surface of the wire rope can be blown to achieve the function of cooling down.

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