Construction engineering prestressed concrete construction device and construction method thereof

Abstract

The invention relates to the technical field of building construction, and discloses a constructional engineering prestressed concrete construction device and a construction method.The constructional engineering prestressed concrete construction device comprises a tensioning mechanism, the tensioning mechanism comprises a forming frame, two sliding plates are slidably connected to the inner wall of the forming frame, and a hydraulic jack is fixedly connected to the side wall of the forming frame; a worker penetrates a reinforcing steel bar into the forming frame, starts a hydraulic jack to retract, drives a sliding plate to move, enables a spring piston rod to move, enables the top of the spring piston rod to make contact with the inclined face of an inclined face block to be extruded, pushes hydraulic oil to move, pushes a clamping block through the hydraulic oil, clamps the reinforcing steel bar, and can stretch and draw the reinforcing steel bar through the clamping block. Along with the tensioning of the reinforcing steel bar, the inclined surface block continuously extrudes the spring piston rod, so that the clamping block keeps enough clamping force, and the tensioning force and the clamping force can be gradually adjusted, so that the clamping force and the tensioning force keep proper matching, and the diameter of the reinforcing steel bar is prevented from being slightly reduced when the reinforcing steel bar is tensioned.

Description

Technical Field

[0001] The invention relates to the technical field of building construction equipment, in particular to a prestressed concrete construction device for a building project and a construction method thereof. Background Art

[0002] Prestressed concrete is designed to compensate for the phenomenon of premature cracks in concrete. Before the component is used, a prestress is given to the concrete in advance. That is, in the tension zone of the concrete, the steel bars are tensioned by artificial force, and the shrinkage force of the steel bars is used to pre-stress the tension zone of the concrete. This stored prestress first offsets the prestress in the concrete in the tension zone when the component is subjected to the tension generated by external loads, and then the concrete is tensile as the load increases. This limits the elongation of the concrete and delays or avoids the appearance of concrete cracks. This is called prestressed concrete.

[0003] Among them, when the steel bars are tensioned, they are often clamped first and then tensioned by a hydraulic jack. The clamping is usually a one-time clamping, but as the tensioning process proceeds, as the steel bars are stretched, their diameter may decrease slightly, resulting in a reduction in the contact area with the clamping device, thereby causing the clamping force to weaken, affecting the stability of the tensioning process and thus affecting the formation of concrete prestress. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a construction engineering prestressed concrete construction device, including a tensioning mechanism, the tensioning mechanism includes a forming frame, two sliding plates are slidably connected to the inner wall of the forming frame, a hydraulic jack is fixedly connected to the side wall of the forming frame, and the output end of the side wall of the hydraulic jack is fixedly connected to the side wall of the sliding plate on the left side; The jet mechanism includes a sliding groove provided on the inner wall of the sliding plate, four concave-convex plates are fixedly connected to the inner wall of the forming frame, and two extrusion plates are slidably connected to the inner walls of the two sliding grooves; The knocking mechanism comprises four arc-shaped frames slidably connected to the side walls of the sliding plates, four fixed blocks are fixedly connected to the side walls of the two sliding plates, and pushing plates are slidably connected to the inner walls of the eight fixed blocks.

[0005] Preferably, the tensioning mechanism also includes two steel bars slidably connected to the inner wall of the forming frame, four clamping blocks are slidably connected to the inner walls of the two sliding plates, four sliding cavities are opened on the inner walls of the two sliding plates, and hydraulic oil is provided on the inner walls of the eight sliding cavities. The staff inserts the steel bars from the left side of the forming frame until they are exposed from the right side of the forming frame, and then starts the hydraulic jack to retract, driving the sliding plate on the left to move toward the direction of the hydraulic jack.

[0006] Preferably, the tensioning mechanism also includes a spring piston rod slidably connected to the inner wall of the sliding cavity, the outer walls of the eight clamping blocks are slidably connected to the inner wall of the sliding cavity, eight inclined blocks are fixedly connected to the inner wall of the forming frame, and two L-shaped rods are fixedly connected to the side walls of the two sliding plates. When the sliding plate moves, it will drive the spring piston rod to move, so that the top of the spring piston rod contacts the inclined surface of the inclined block, so that the spring piston rod is squeezed, pushing the hydraulic oil in the sliding cavity to move, and the clamping block is pushed by the hydraulic oil to clamp the steel bar. As the sliding plate continues to move, the spring piston rod will continue to be squeezed, so that the clamping block applies a greater clamping force to the steel bar. When the clamping force is sufficient, the steel bar can be tensioned by the clamping block. As the steel bar is tensioned, the inclined block will continue to squeeze the spring piston rod, so that the clamping block maintains sufficient clamping force.

[0007] Preferably, the tensioning mechanism further comprises a rotating rod rotatably connected to the front and back sides of the forming frame, the inner walls of the two rotating rods are both rotatably connected to two connecting plates, and the inner walls of the two connecting plates on the left are both rotatably connected to the outer wall of the L-shaped rod on the left; Among them, the inner wall of the right connecting plate is rotatably connected with the inner wall of the L-shaped rod on the right, and four forming plates are slidably connected to the inner wall of the forming frame. At the same time, when the sliding plate on the left moves toward the direction of the hydraulic jack, it will drive the L-shaped rod to move, and the L-shaped rod will pull the connecting plate to move, driving the rotating rod to rotate. By rotating the rotating rod, the connecting plate on the right is pulled to move, thereby driving the L-shaped rod on the right to move, so that the two sliding plates are moved away from each other, and the two ends of the steel bar are tensioned at the same time. After the steel bar is tensioned, concrete is poured between the forming plates until the concrete is formed. By tensioning both ends of the steel bar at the same time, the stroke required for tensioning the steel bar is shorter, thereby effectively preventing the steel bar from being tensioned for a long time, which may cause the spring piston rod to get stuck during the movement process; in addition: the tensioning force and the clamping force can be gradually adjusted, so that the clamping force and the tensioning force always maintain proper coordination, effectively preventing the diameter of the steel bar from being slightly reduced when the steel bar is tensioned, affecting the stability of the clamping, ensuring the stability of the tensioning process, and ensuring the stable forming of the prestressed concrete.

[0008] Preferably, the jet mechanism also includes two spring return rods fixedly connected to the inner wall of the sliding groove, the inner walls of the four extrusion plates are slidably connected to the outer walls of the spring return rods, the inner walls of the two sliding grooves are slidably connected to two sliding rods, the bottom of the top extrusion plate is rotatably connected to two connecting rods one, and the side walls of the four sliding rods are rotatably connected to the inner wall of the connecting rod one. The force of the sliding plate moving will drive the extrusion plate to move when the sliding plate moves. When the extrusion plate moves from the concave position of the concave-convex plate to the convex position, the concave-convex plate will be squeezed, allowing the two extrusion plates to approach each other, squeezing the gas in the sliding groove and squeezing the spring return rod at the same time, allowing the spring return rod to accumulate resilience.

[0009] Preferably, the jet mechanism also includes a connecting rod fixedly connected to the side wall of the sliding rod, and two connecting rods 1 are rotatably connected to the bottom of the top extrusion plate, and the side walls of the four sliding rods are rotatably connected to the side wall of the connecting rod 1, and the inner walls of the two sliding grooves are rotatably connected to two spring blocking plates, and the inner walls of the two sliding grooves are fixedly connected to two jet pipes. At this time, the squeezed gas will be blocked by the spring blocking plates, allowing the gas to generate high pressure. When the extrusion plate located at the top descends, the connecting rod 1 will rotate, pushing the two sliding rods away from each other, driving the connecting rod to move until the connecting rod contacts the spring blocking plate, allowing the connecting rod to push the spring blocking plate to rotate, allowing the spring blocking plate to accumulate rebound force, and when the spring blocking plate rotates, the high-pressure gas will enter the jet pipe, and be sprayed toward the clamping block and the steel bar through the jet pipe, thereby cooling the clamped position of the steel bar.

[0010] Preferably, the knocking mechanism also includes two connecting rods 2 rotatably connected to the side walls of the arc-shaped frame, the eight push plates are rotatably connected to the inner wall of the connecting rod 2 on one side close to the fixed block, the side walls of the two sliding plates are fixedly connected to twelve fixed frames, and the outer walls of the twenty-four fixed frames are rotatably connected to the knocking blocks; Among them, the side walls of the twenty-four knocking blocks are fixedly connected with arc springs, and the sides of the twenty-four arc springs away from the knocking blocks are fixedly connected to the side walls of the sliding plate. By utilizing the force of the sliding rod moving, when the two sliding rods move away from each other, the sliding rod will contact the arc frame and push the arc frame to move toward the direction of the steel bar. When the arc frame moves, it will drive the second connecting rod to rotate, and push the push plate to move toward the direction of the steel bar. The push plate passes through the second connecting rod, allowing the two arc frames to approach each other, thereby squeezing the knocking block, allowing the knocking block to rotate, stretching the arc spring, and allowing the arc spring to accumulate rebound force until multiple knocking blocks contact the steel bar and knock the steel bar.

[0011] Preferably, the knocking mechanism also includes two connecting rings fixedly connected to the side walls of the sliding plate, six sliding frames are fixedly connected to the inner walls of the four connecting rings, clamping blocks are slidably connected to the inner walls of the twenty-four sliding frames, spring extrusion rods are fixedly connected to the tops of the twenty-four clamping blocks, and spring extrusion rods are slidably connected to the inner walls of the twenty-four sliding sleeves. By utilizing the force of the movement of the knocking blocks, when the steel bar tensioning is completed, the extrusion plate will contact the protruding position of the concave-convex plate, so that the extrusion plate is in an extruded state, so that the knocking block contacts the steel bar, and when the knocking block moves toward the steel bar, it will also drive the sliding sleeve to move, drive the spring extrusion rod to move and contact the clamping block, push the clamping block to move, and squeeze the steel bar. As the knocking block continues to move, the sliding sleeve will continue to squeeze the spring extrusion rod, so that the clamping block applies a greater extrusion force to the steel bar through the spring extrusion rod, and perform a secondary clamping after the steel bar tensioning is completed.

[0012] A construction method for a prestressed concrete construction device for a building project, the construction method comprising: inserting a steel bar from the left side of a forming frame until it emerges from the right side of the forming frame, then starting the hydraulic jack to retract, driving the sliding plate on the left side to move toward the direction of the hydraulic jack, when the sliding plate moves, it will drive the spring piston rod to move, so that the top of the spring piston rod contacts the inclined surface of the inclined surface block, so that the spring piston rod is squeezed, and the hydraulic oil in the sliding chamber is pushed to move, and the clamping block is pushed by the hydraulic oil to clamp the steel bar, as the sliding plate continues to move, the spring piston rod will be continuously squeezed, so that the clamping block applies a greater clamping force to the steel bar, when the clamping force is sufficient, the steel bar can be tensioned by the clamping block, and as the steel bar is tensioned, the inclined surface block will continue to squeeze the spring piston rod, so that The clamping block maintains sufficient clamping force. At the same time, when the sliding plate on the left moves toward the direction of the hydraulic jack, it will drive the L-shaped rod to move. The L-shaped rod will pull the connecting plate to move, driving the rotating rod to rotate. By rotating the rotating rod, the connecting plate on the right is pulled to move, thereby driving the L-shaped rod on the right to move, so that the two sliding plates are moved away from each other. At the same time, the two ends of the steel bar are tensioned. After the steel bar is tensioned, concrete is poured between the forming plates until the concrete is formed. By tensioning both ends of the steel bar at the same time, the stroke required for tensioning the steel bar is shorter, thereby effectively preventing the steel bar tensioning stroke from being longer, which may cause the spring piston rod to get stuck during movement; the tensioning force and clamping force can be gradually adjusted so that the clamping force and tensioning force always maintain proper coordination to ensure stable forming of prestressed concrete.

[0013] The present invention has the following beneficial effects: (1) When the present invention is used, a worker inserts the steel bar from the left side of the forming frame until it emerges from the right side of the forming frame, and then starts the hydraulic jack to retract, driving the sliding plate on the left side to move toward the hydraulic jack. When the sliding plate moves, it drives the spring piston rod to move, allowing the top of the spring piston rod to contact the inclined surface of the inclined block, so that the spring piston rod is squeezed, pushing the hydraulic oil in the sliding chamber to move, and the clamping block is pushed by the hydraulic oil to clamp the steel bar. As the sliding plate continues to move, the spring piston rod will continue to be squeezed, so that the clamping block applies a greater clamping force to the steel bar. When the clamping force is sufficient, the steel bar can be tensioned by the clamping block. As the steel bar is tensioned, the inclined block will continue to squeeze the spring piston rod, so that the clamping block maintains a sufficient clamping force. At the same time, the sliding plate on the left side moves toward the hydraulic jack. When the lever moves in the opposite direction, it will drive the L-shaped rod to move, and the L-shaped rod will pull the connecting plate to move, driving the rotating rod to rotate. By rotating the rotating rod, the connecting plate on the right side is pulled to move, thereby driving the L-shaped rod on the right side to move, so that the two sliding plates move away from each other, and at the same time, the two ends of the steel bar are tensioned. When the steel bar is tensioned, concrete is poured between the forming plates until the concrete is formed. By tensioning both ends of the steel bar at the same time, the stroke required for tensioning the steel bar is shorter, thereby effectively preventing the steel bar from being tensioned for a long time, which may cause the spring piston rod to get stuck during the movement; in addition: the tensioning force and the clamping force can be gradually adjusted, so that the clamping force and the tensioning force always maintain proper coordination, effectively preventing the diameter of the steel bar from being slightly reduced when the steel bar is tensioned, affecting the stability of the clamping, ensuring the stability of the tensioning process, and ensuring the stable forming of the prestressed concrete.

[0014] (2) The present invention utilizes the force of the sliding plate moving. When the sliding plate moves, it drives the extrusion plate to move. When the extrusion plate moves from the concave position of the concave-convex plate to the convex position, the concave-convex plate will be squeezed, causing the two extrusion plates to approach each other, squeezing the gas in the sliding groove and squeezing the spring return rod at the same time, allowing the spring return rod to accumulate rebound force. At this time, the squeezed gas will be blocked by the spring blocking plate, causing the gas to generate high pressure. When the extrusion plate at the top drops, it will cause the connecting rod to rotate, pushing the two sliding rods away from each other, driving the connecting rod to move until the connecting rod contacts the spring blocking plate, allowing the connecting rod to push The spring blocking plate rotates to accumulate resilience. When the spring blocking plate rotates, high-pressure gas enters the jet pipe and is sprayed toward the clamping block and the steel bar through the jet pipe to cool down the clamped position of the steel bar, effectively preventing the steel bar from being affected by the friction between the clamping block and the steel bar during the tensioning process. This may cause the clamped position to heat up, and may cause the clamped part of the steel bar to expand slightly due to thermal expansion, which may cause the clamping force of the clamping block to change. The cooling effect of the high-pressure gas can effectively reduce the temperature rise caused by friction, ensure the close combination of the steel bar and the clamping block, and effectively maintain the stability during the tensioning process.

[0015] (3) The present invention utilizes the force of the sliding rod moving. When the two sliding rods move away from each other, the sliding rod will contact the arc frame and push the arc frame to move toward the steel bar. When the arc frame moves, it will drive the second connecting rod to rotate and push the push plate to move toward the steel bar. The push plate passes through the second connecting rod and allows the two arc frames to approach each other, thereby squeezing the knocking block, causing the knocking block to rotate, stretching the arc spring, and allowing the arc spring to accumulate rebound force until multiple knocking blocks contact the steel bar. At this time, the extrusion plate will contact the concave position of the concave-convex plate again. At this time, the extrusion plate is affected by the rebound force of the spring return rod and returns to its position, driving the sliding rod to return to its position, allowing the sliding rod to separate from the arc frame. At this time, the rebound force of the arc spring will be released, driving the knocking block to swing back and forth and knock on the surface of the steel bar. By knocking on the surrounding areas of the steel bar through multiple knocking blocks, the stress on the steel bar during tensioning can be evenly distributed, local stress concentration can be reduced, and uneven deformation of the steel bar during tensioning can be effectively prevented, thereby ensuring the stable formation of the tensioning force.

[0016] (4) The present invention utilizes the force of the movement of the striking block. When the steel bar is tensioned, the extrusion plate will contact the protruding position of the concave-convex plate, so that the extrusion plate is in an extruded state, and the striking block is in contact with the steel bar. When the striking block moves toward the steel bar, it will also drive the sliding sleeve to move, drive the spring extrusion rod to move and contact the clamping block, push the clamping block to move, and squeeze the steel bar. As the striking block continues to move, the sliding sleeve will continue to squeeze the spring extrusion rod, and the spring extrusion rod will allow the clamping block to apply a greater extrusion force to the steel bar. After the steel bar is tensioned, a secondary clamping is performed, which solves the problem that when the concrete has not yet completely solidified and the strength of the concrete itself has not yet reached the expected value, the steel bar may relax due to the elastic recovery of the material itself or the plastic deformation of the concrete. The secondary clamping can reduce the relaxation of the steel bar, ensuring that the steel bar always maintains appropriate prestress during the concrete hardening process. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0018] Figure 1 It is a schematic cross-sectional view of the overall structure of the present invention; Figure 2 It is a schematic diagram of the overall structure of the present invention; Figure 3 It is a cross-sectional schematic diagram of the forming frame of the present invention; Figure 4 For the present invention Figure 3 A is an enlarged schematic diagram; Figure 5 It is a right side cross-sectional schematic diagram of the molding frame of the present invention; Figure 6 For the present invention Figure 5 A magnified schematic diagram of B; Figure 7 It is a right side cross-sectional schematic diagram of the sliding plate of the present invention; Figure 8 For the present invention Figure 7 A magnified schematic diagram of middle C; Fig. 9 For the present invention Figure 7 A magnified schematic diagram of D in the middle; Fig.10 It is a schematic diagram of the explosion of the knocking mechanism assembly of the present invention.

[0019] In the accompanying drawings, the components represented by the reference numerals are listed as follows: In the figure: 1. tensioning mechanism; 101. forming frame; 102. sliding plate; 103. hydraulic jack; 104. steel bar; 105. clamping block; 106. sliding chamber; 107. spring piston rod; 108. inclined block; 109. L-shaped rod; 110. rotating rod; 111. connecting plate; 112. forming plate; 2. jet mechanism; 201. sliding groove; 202. concave-convex plate; 203. extrusion plate; 204. spring return Rod; 205, connecting rod one; 206, sliding rod; 207, connecting rod; 208, spring blocking plate; 209, jet pipe; 3, knocking mechanism; 301, arc frame; 302, fixed block; 303, push plate; 304, connecting rod two; 305, fixed frame; 306, knocking block; 307, arc spring; 308, connecting ring; 309, sliding frame; 310, clamping block; 311, sliding sleeve; 312, spring extrusion rod. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] For example, see Figure 1-Figure 4 The present invention is a prestressed concrete construction device for construction engineering, comprising a tensioning mechanism 1, the tensioning mechanism 1 comprising a forming frame 101, two sliding plates 102 are slidably connected to the inner wall of the forming frame 101, a hydraulic jack 103 is fixedly connected to the side wall of the forming frame 101, and an output end of the side wall of the hydraulic jack 103 is fixedly connected to the side wall of the sliding plate 102 located on the left side; The jet mechanism 2 includes a sliding groove 201 provided on the inner wall of the sliding plate 102, four concave-convex plates 202 are fixedly connected to the inner wall of the forming frame 101, and two extrusion plates 203 are slidably connected to the inner walls of the two sliding grooves 201; The knocking mechanism 3 includes four arc-shaped frames 301 slidably connected to the side walls of the sliding plates 102 , four fixed blocks 302 are fixedly connected to the side walls of the two sliding plates 102 , and pushing plates 303 are slidably connected to the inner walls of the eight fixed blocks 302 .

[0022] The tensioning mechanism 1 also includes two steel bars 104 slidably connected to the inner wall of the forming frame 101, and four clamping blocks 105 are slidably connected to the inner walls of the two sliding plates 102. Four sliding cavities 106 are opened on the inner walls of the two sliding plates 102, and hydraulic oil is provided on the inner walls of the eight sliding cavities 106. The staff inserts the steel bars 104 from the left side of the forming frame 101 until it is exposed from the right side of the forming frame 101, and then starts the hydraulic jack 103 to retract, driving the sliding plate 102 on the left side to move toward the hydraulic jack 103.

[0023] The tensioning mechanism 1 also includes a spring piston rod 107 slidably connected to the inner wall of the sliding cavity 106. The outer walls of the eight clamping blocks 105 are slidably connected to the inner wall of the sliding cavity 106. Eight inclined plane blocks 108 are fixedly connected to the inner wall of the forming frame 101. Two L-shaped rods 109 are fixedly connected to the side walls of the two sliding plates 102. When the sliding plate 102 moves, it will drive the spring piston rod 107 to move, so that the top of the spring piston rod 107 contacts the inclined surface of the inclined plane block 108, so that the spring piston rod 107 is subjected to The hydraulic oil in the sliding chamber 106 is pushed to move by the hydraulic oil, and the clamping block 105 is pushed by the hydraulic oil to clamp the steel bar 104. As the sliding plate 102 continues to move, the spring piston rod 107 will be continuously squeezed, so that the clamping block 105 applies a greater clamping force to the steel bar. When the clamping force is sufficient, the steel bar 104 can be tensioned by the clamping block 105. As the steel bar 104 is tensioned, the inclined block 108 will continue to squeeze the spring piston rod 107, so that the clamping block 105 maintains sufficient clamping force.

[0024] The tensioning mechanism 1 also includes a rotating rod 110 rotatably connected to the front and back of the forming frame 101, and the inner walls of the two rotating rods 110 are both rotatably connected to two connecting plates 111, and the inner walls of the two connecting plates 111 on the left are both rotatably connected to the outer wall of the L-shaped rod 109 on the left; Among them, the inner wall of the right connecting plate 111 is rotatably connected to the inner wall of the L-shaped rod 109 on the right, and four forming plates 112 are slidably connected to the inner wall of the forming frame 101. At the same time, when the sliding plate 102 on the left moves toward the direction of the hydraulic jack 103, it will drive the L-shaped rod 109 to move, and the L-shaped rod 109 will pull the connecting plate 111 to move, driving the rotating rod 110 to rotate. By rotating the rotating rod 110, the connecting plate 111 on the right is pulled to move, thereby driving the L-shaped rod 109 on the right to move, so that the two sliding plates 102 are separated from each other, and at the same time, the two ends of the steel bar 104 are tightened. Tensioning, when the steel bar 104 is tensioned, concrete is poured between the forming plates 112 until the concrete is formed. By tensioning both ends of the steel bar 104 at the same time, the stroke required for tensioning the steel bar 104 is shorter, thereby effectively preventing the steel bar 104 from being tensioned for a long time, which may cause the spring piston rod 107 to get stuck during the movement; in addition: the tensioning force and the clamping force can be gradually adjusted so that the clamping force and the tensioning force always maintain proper coordination, effectively preventing the diameter of the steel bar 104 from being slightly reduced when the steel bar 104 is tensioned, affecting the stability of the clamping, ensuring the stability of the tensioning process, and ensuring the stable forming of the prestressed concrete.

[0025] For example 2, please refer to Figure 5-Figure 10 The present invention is a prestressed concrete construction device for construction engineering. On the basis of Example 1, the jet mechanism 2 also includes two spring return rods 204 fixedly connected to the inner wall of the sliding groove 201, and the inner walls of the four extrusion plates 203 are slidably connected to the outer walls of the spring return rods 204. The inner walls of the two sliding grooves 201 are slidably connected to two sliding rods 206. The bottom of the top extrusion plate 203 is rotatably connected to two connecting rods 205. The side walls of the four sliding rods 206 are rotatably connected to the inner wall of the connecting rod 205. The force of the sliding plate 102 moving will drive the extrusion plate 203 to move when the sliding plate 102 moves. When the extrusion plate 203 moves from the concave position of the concave-convex plate 202 to the convex position, the concave-convex plate 202 will be squeezed, so that the two extrusion plates 203 are close to each other, squeezing the gas in the sliding groove 201 and squeezing the spring return rod 204 at the same time, so that the spring return rod 204 accumulates resilience.

[0026] The jet mechanism 2 also includes a connecting rod 207 fixedly connected to the side wall of the sliding rod 206, and is rotatably connected to two connecting rods 205 at the bottom of the top extrusion plate 203. The side walls of the four sliding rods 206 are rotatably connected to the side walls of the connecting rod 205. The inner walls of the two sliding grooves 201 are rotatably connected to two spring blocking plates 208, and the inner walls of the two sliding grooves 201 are fixedly connected to two jet pipes 209. At this time, the squeezed gas will be blocked by the spring blocking plate 208, allowing the gas to generate high pressure. When the extrusion plate 203 at the top descends, the connecting rod 205 will rotate, pushing the two sliding rods 206 away from each other, driving the connecting rod 207 to move until the connecting rod 207 contacts the spring blocking plate 208, allowing the connecting rod 207 to push the spring blocking plate 208 to rotate, allowing the spring blocking plate 208 to accumulate resilience. When the spring blocking plate 208 rotates, high-pressure gas will enter the jet pipe 209, and be sprayed toward the clamping block 105 and the steel bar 104 through the jet pipe 209, thereby cooling the clamped position of the steel bar 104.

[0027] The knocking mechanism 3 also includes two connecting rods 304 rotatably connected to the side walls of the arc frame 301, and the eight push plates 303 are rotatably connected to the inner wall of the connecting rod 304 on one side close to the fixed block 302. The side walls of the two sliding plates 102 are fixedly connected with twelve fixed frames 305, and the outer walls of the twenty-four fixed frames 305 are rotatably connected with knocking blocks 306. Among them, the side walls of the twenty-four knocking blocks 306 are fixedly connected with arc springs 307, and the side of the twenty-four arc springs 307 away from the knocking blocks 306 is fixedly connected to the side wall of the sliding plate 102. By utilizing the force of the sliding rod 206 moving, when the two sliding rods 206 move away from each other, the sliding rod 206 will contact the arc frame 301, pushing the arc frame 301 to move toward the direction of the steel bar 104. When the arc frame 301 moves, it will drive the second connecting rod 304 to rotate, pushing the pushing plate 303 to move toward the direction of the steel bar 104. The pushing plate 303 passes through the second connecting rod 304, allowing the two arc frames 301 to approach each other, thereby squeezing the knocking block 306, allowing the knocking block 306 to rotate, stretching the arc spring 307, and allowing the arc spring 307 to accumulate resilience until multiple knocking blocks 306 contact the steel bar 104 and knock the steel bar 104.

[0028] The knocking mechanism 3 also includes two connecting rings 308 fixedly connected to the side wall of the sliding plate 102, six sliding frames 309 are fixedly connected to the inner walls of the four connecting rings 308, and the inner walls of the twenty-four sliding frames 309 are slidably connected to the clamping blocks 310, the tops of the twenty-four clamping blocks 310 are fixedly connected to the spring extrusion rods 312, and the inner walls of the twenty-four sliding sleeves 311 are slidably connected to the spring extrusion rods 312. By using the force of the knocking block 306 moving, when the steel bar 104 is tensioned, the extrusion plate 203 will contact the protruding position of the concave-convex plate 202. The extrusion plate 203 is placed in an extruded state so that the striking block 306 contacts the steel bar 104. When the striking block 306 moves toward the steel bar 104, it also drives the sliding sleeve 311 to move, driving the spring extrusion rod 312 to move and contact the clamping block 310, pushing the clamping block 310 to move and extrude the steel bar 104. As the striking block 306 continues to move, the sliding sleeve 311 will continue to squeeze the spring extrusion rod 312, allowing the clamping block 310 to apply a greater extrusion force to the steel bar 104 through the spring extrusion rod 312. After the steel bar 104 is tensioned, a secondary clamping is performed.

[0029] There is no limitation on the number of the above components, and relevant technicians in the field can freely set them according to actual needs, as long as the above components are installed at the connection positions of the corresponding components.

[0030] A specific application of this embodiment is: A construction method for a prestressed concrete construction device for a construction project, the construction method comprising: when the present invention is used, a worker inserts a steel bar 104 from the left side of a forming frame 101 until it is exposed from the right side of the forming frame 101, and then starts the hydraulic jack 103 to retract, driving the sliding plate 102 on the left side to move toward the hydraulic jack 103. When the sliding plate 102 moves, it drives the spring piston rod 107 to move, so that the top of the spring piston rod 107 contacts the inclined surface of the inclined surface block 108, so that the spring piston rod 107 The hydraulic oil in the sliding chamber 106 is pushed to move, and the clamping block 105 is pushed by the hydraulic oil to clamp the steel bar 104. As the sliding plate 102 continues to move, the spring piston rod 107 will continue to be squeezed, so that the clamping block 105 applies a greater clamping force to the steel bar. When the clamping force is sufficient, the steel bar 104 can be tensioned by the clamping block 105. As the steel bar 104 is tensioned, the inclined block 108 will continue to squeeze the spring piston rod 107, so that the clamping block 105 maintains sufficient clamping force. At the same time, when the sliding plate 102 on the left side moves toward the hydraulic jack 103, it will drive the L-shaped rod 109 to move, and the L-shaped rod 109 will pull the connecting plate 111 to move, driving the rotating rod 110 to rotate. By rotating the rotating rod 110, the connecting plate 111 on the right side is pulled to move, thereby driving the L-shaped rod 109 on the right side to move, so that the two sliding plates 102 are separated from each other, and at the same time, the two ends of the steel bar 104 are tensioned. After the tensioning of the steel bar 104 is completed, concrete is poured between the forming plates 112 until To form the concrete, the two ends of the steel bar 104 are tensioned at the same time, and the travel required for tensioning the steel bar 104 is short, thereby effectively preventing the long tensioning travel of the steel bar 104, which may cause the spring piston rod 107 to get stuck during the movement; in addition, the tensioning force and the clamping force can be gradually adjusted, so that the clamping force and the tensioning force always maintain proper coordination, effectively preventing the diameter of the steel bar 104 from being slightly reduced when the steel bar 104 is tensioned, affecting the stability of the clamping, ensuring the stability of the tensioning process, and ensuring the stable forming of the prestressed concrete; When the concrete is solidified, the staff can cut off the excess part of the steel bar 104, then pull out the forming plate 112 and take out the prestressed concrete; Secondly, when the sliding plate 102 moves, it will drive the extrusion plate 203 to move. When the extrusion plate 203 moves from the concave position of the concave-convex plate 202 to the convex position, the concave-convex plate 202 will be squeezed, so that the two extrusion plates 203 are close to each other, squeezing the gas in the sliding groove 201 and squeezing the spring return rod 204 at the same time, so that the spring return rod 204 accumulates resilience. At this time, the squeezed gas will be blocked by the spring blocking plate 208, so that the gas generates high pressure. When the extrusion plate 203 at the top drops, it will cause the connecting rod 205 to rotate, pushing the two sliding rods 206 away from each other, driving the connecting rod 207 to move until the connecting rod 207 contacts the spring blocking plate 208, allowing the connecting rod 207 to push the spring return rod 204 ... The spring blocking plate 208 rotates to allow the spring blocking plate 208 to accumulate resilience. When the spring blocking plate 208 rotates, high-pressure gas will enter the jet pipe 209 and be sprayed toward the clamping block 105 and the steel bar 104 through the jet pipe 209, thereby cooling the clamped position of the steel bar 104, and effectively preventing the steel bar 104 from being affected by the friction between the clamping block 105 and the steel bar 104 during the tensioning process, which may cause the clamped position to heat up, and may cause the clamped part of the steel bar 104 to slightly expand thermally, which may cause the clamping force of the clamping block 105 to change. The cooling effect of the high-pressure gas can effectively reduce the temperature rise caused by friction, ensure the close combination of the steel bar 104 and the clamping block 105, and effectively maintain the stability during the tensioning process; Secondly, when the two sliding rods 206 move away from each other, the sliding rod 206 will contact the arc frame 301, pushing the arc frame 301 to move toward the steel bar 104. When the arc frame 301 moves, it will drive the second connecting rod 304 to rotate, pushing the push plate 303 to move toward the steel bar 104. The push plate 303 passes through the second connecting rod 304, allowing the two arc frames 301 to approach each other, thereby squeezing the knocking block 306, allowing the knocking block 306 to rotate, stretching the arc spring 307, and allowing the arc spring 307 to accumulate resilience until multiple knocking blocks 306 contact the steel bar 104. At this time, the squeezing plate 203 The pressing plate 203 will contact the concave position of the concave-convex plate 202 again. At this time, the extrusion plate 203 is affected by the rebound force of the spring return rod 204 to return to its original position, driving the sliding rod 206 to return to its original position, so that the sliding rod 206 is separated from the arc frame 301. At this time, the rebound force of the arc spring 307 will be released, driving the knocking block 306 to swing back and forth, knocking the surface of the steel bar 104. By knocking the surroundings of the steel bar 104 with multiple knocking blocks 306, the stress on the steel bar 104 during tensioning can be evenly distributed, reducing local stress concentration, effectively preventing uneven deformation of the steel bar 104 during tensioning, and ensuring the stability of the tensioning force. Secondly, when the steel bar 104 is tensioned, the extrusion plate 203 will contact the protruding position of the concave-convex plate 202, so that the extrusion plate 203 is in an extruded state, so that the knocking block 306 is in contact with the steel bar 104. When the knocking block 306 moves toward the steel bar 104, it will also drive the sliding sleeve 311 to move, drive the spring extrusion rod 312 to move and contact the clamping block 310, push the clamping block 310 to move, and squeeze the steel bar 104. As the knocking block 306 continues to move, the sliding sleeve 311 will continue to squeeze the spring extrusion rod 312, through the spring squeezing rod 312, the clamping block 310 applies a greater squeezing force to the steel bar 104. After the steel bar 104 is tensioned, a secondary clamping is performed to solve the problem that when the concrete has not yet completely solidified and the strength of the concrete itself has not yet reached the expected value, the steel bar 104 may relax due to the elastic recovery of the material itself or the plastic deformation of the concrete. Through the secondary clamping, the relaxation of the steel bar 104 is reduced, ensuring that the steel bar 104 always maintains appropriate prestress during the concrete hardening process.

[0031] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A prestressed concrete construction device for a construction project, comprising a tensioning mechanism (1), the tensioning mechanism (1) comprising a forming frame (101), two sliding plates (102) being slidably connected to the inner wall of the forming frame (101), a hydraulic jack (103) being fixedly connected to the side wall of the forming frame (101), an output end of the side wall of the hydraulic jack (103) being fixedly connected to the side wall of the sliding plate (102) on the left side, characterized in that: Also includes: An air jet mechanism (2), the air jet mechanism (2) comprising a sliding groove (201) provided on the inner wall of the sliding plate (102), four concave-convex plates (202) being fixedly connected to the inner wall of the forming frame (101), and two extrusion plates (203) being slidably connected to the inner walls of two of the sliding grooves (201); A knocking mechanism (3), the knocking mechanism (3) comprising four arc-shaped frames (301) slidably connected to the side walls of the sliding plate (102), four fixed blocks (302) being fixedly connected to the side walls of two of the sliding plates (102), and push plates (303) being slidably connected to the inner walls of the eight fixed blocks (302).

2. A prestressed concrete construction device for construction engineering according to claim 1, characterized in that: The tensioning mechanism (1) further comprises two steel bars (104) slidably connected to the inner wall of the forming frame (101); four clamping blocks (105) are slidably connected to the inner walls of the two sliding plates (102); four sliding cavities (106) are provided on the inner walls of the two sliding plates (102); and hydraulic oil is provided on the inner walls of the eight sliding cavities (106).

3. A prestressed concrete construction device for construction engineering according to claim 2, characterized in that: The tensioning mechanism (1) further comprises a spring piston rod (107) slidably connected to the inner wall of the sliding cavity (106); the outer walls of the eight clamping blocks (105) are slidably connected to the inner wall of the sliding cavity (106); eight inclined plane blocks (108) are fixedly connected to the inner wall of the forming frame (101); and two L-shaped rods (109) are fixedly connected to the side walls of the two sliding plates (102).

4. A prestressed concrete construction device for construction engineering according to claim 3, characterized in that: The tensioning mechanism (1) further comprises a rotating rod (110) rotatably connected to the front and back sides of the forming frame (101); the inner walls of the two rotating rods (110) are both rotatably connected to two connecting plates (111); the inner walls of the two connecting plates (111) on the left are both rotatably connected to the outer wall of the L-shaped rod (109) on the left; The inner wall of the connecting plate (111) on the right side is rotatably connected to the inner wall of the L-shaped rod (109) on the right side, and the inner wall of the forming frame (101) is slidably connected to four forming plates (112).

5. A prestressed concrete construction device for construction engineering according to claim 4, characterized in that: The jet mechanism (2) further comprises two spring return rods (204) fixedly connected to the inner wall of the sliding groove (201); the inner walls of the four extrusion plates (203) are slidably connected to the outer walls of the spring return rods (204); the inner walls of the two sliding grooves (201) are slidably connected to two sliding rods (206); the bottom of the extrusion plate (203) at the top is rotatably connected to two connecting rods (205); and the side walls of the four sliding rods (206) are rotatably connected to the inner wall of the connecting rod (205).

6. A prestressed concrete construction device for construction engineering according to claim 5, characterized in that: The jet mechanism (2) further comprises a connecting rod (207) fixedly connected to the side wall of the sliding rod (206); the bottom of the extrusion plate (203) located at the top is rotatably connected to two connecting rods 1 (205); the side walls of the four sliding rods (206) are rotatably connected to the side wall of the connecting rod 1 (205); the inner walls of the two sliding grooves (201) are rotatably connected to two spring blocking plates (208); and the inner walls of the two sliding grooves (201) are fixedly connected to two jet pipes (209).

7. A prestressed concrete construction device for construction engineering according to claim 6, characterized in that: The knocking mechanism (3) further comprises two connecting rods (304) rotatably connected to the side walls of the arc frame (301); one side of the eight pushing plates (303) close to the fixed block (302) is rotatably connected to the inner wall of the connecting rod (304); twelve fixed frames (305) are fixedly connected to the side walls of the two sliding plates (102); and knocking blocks (306) are rotatably connected to the outer walls of the twenty-four fixed frames (305); The side walls of the twenty-four knocking blocks (306) are all fixedly connected with arc springs (307), and the sides of the twenty-four arc springs (307) away from the knocking blocks (306) are all fixedly connected to the side wall of the sliding plate (102).

8. A prestressed concrete construction device for construction engineering according to claim 7, characterized in that: The knocking mechanism (3) further comprises two connecting rings (308) fixedly connected to the side wall of the sliding plate (102); six sliding frames (309) are fixedly connected to the inner walls of the four connecting rings (308); pressing blocks (310) are slidably connected to the inner walls of the twenty-four sliding frames (309); spring extrusion rods (312) are fixedly connected to the tops of the twenty-four pressing blocks (310); and spring extrusion rods (312) are slidably connected to the inner walls of the twenty-four sliding sleeves (311).

9. A construction method of a prestressed concrete construction device for construction engineering according to claim 8, characterized in that: The construction method comprises: inserting a steel bar (104) of a prestressed concrete construction device of a construction project from the left side of a forming frame (101) until it is exposed from the right side of the forming frame (101), and then starting a hydraulic jack (103) to retract, driving a sliding plate (102) on the left side to move toward the hydraulic jack (103); when the sliding plate (102) moves, it drives a spring piston rod (107) to move, so that the top of the spring piston rod (107) contacts the inclined surface of an inclined surface block (108), and the spring piston rod (107) is moved. ) is squeezed, pushing the hydraulic oil in the sliding chamber (106) to move, and the hydraulic oil pushes the clamping block (105) to clamp the steel bar (104). As the sliding plate (102) continues to move, the spring piston rod (107) is continuously squeezed, so that the clamping block (105) applies a greater clamping force to the steel bar; when the clamping force is sufficient, the steel bar (104) can be tensioned by the clamping block (105). As the steel bar (104) is tensioned, the inclined block (108) continues to squeeze the spring piston rod (107). 07), so that the clamping block (105) maintains sufficient clamping force. At the same time, when the sliding plate (102) on the left side moves toward the hydraulic jack (103), it will drive the L-shaped rod (109) to move. The L-shaped rod (109) will pull the connecting plate (111) to move, driving the rotating rod (110) to rotate. The rotating rod (110) rotates, pulling the connecting plate (111) on the right side to move, thereby driving the L-shaped rod (109) on the right side to move, so that the two sliding plates (102) move away from each other, and at the same time The two ends of the steel bar (104) are tensioned. After the tensioning of the steel bar (104) is completed, concrete is poured between the forming plates (112) until the concrete is formed. By tensioning the two ends of the steel bar (104) at the same time, the travel required for tensioning the steel bar (104) is shorter, thereby effectively preventing the steel bar (104) from being tensioned for a long time, which may cause the spring piston rod (107) to get stuck during the movement process; by gradually adjusting the tensioning force and the clamping force, the clamping force and the tensioning force are always properly coordinated, thereby ensuring stable forming of the prestressed concrete.

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