Prefabricated steel tensioning device

Abstract

The present invention provides a prefabricated steel tensioning device, which relates to the technical field of building construction. The prefabricated steel tensioning device comprises a support frame, a support arm and a tensioning driving member, wherein the support frame is used to be placed on one side of the steel to be tensioned at the end of the prefabricated part, the support arm is slidably connected to the support frame, and the tensioning driving member is installed on the support arm. The support arm can move on the support frame to drive the tensioning driving member to move in the extension direction of the steel to be tensioned. The position where the tensioning driving member is installed on the support arm can pass over the cantilever at the end of the prefabricated part and approach the steel to be tensioned. The present invention alleviates the technical problem that when the steel of the prefabricated part with a cantilever is tensioned by the post-tensioning method in the prior art, due to the obstruction of the cantilever, there is a large distance between the jack and the end of the steel in the length direction of the steel, and the jack needs to be manually carried to be sleeved on the steel, resulting in a large labor intensity of the construction personnel and low construction efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, in particular to a prefabricated steel material tensioning device. Background Art

[0002] With the development of transportation, prestressed beam bridges are widely used in bridge construction. During the construction of prestressed beam bridges, a large number of prefabricated parts such as prestressed post-tensioned box girders constructed using the prestressed post-tensioning method are required.

[0003] When using the prestressed post-tensioning method to prepare prefabricated parts, it is necessary to first arrange the steel bars or steel strands used in the prefabricated parts along the length of the prefabricated parts, and surround the formwork around the steel. When surrounding the formwork, both ends of the steel need to pass through the formwork to reserve part of the steel. After the formwork is surrounded, concrete is poured in the formwork, and the formwork is removed after the concrete solidifies. At this time, the part of the steel exposed outside the formwork is exposed outside the concrete. Then clamp the part of the steel exposed outside the concrete and tension the steel along the length of the steel. Finally, use a clamp fixed on the concrete to clamp the tensioned steel so that the steel remains in a tensioned state, and the post-tensioning construction process of the prefabricated parts can be completed.

[0004] The existing process of tensioning the steel in the prefabricated parts is usually achieved by using a gantry crane, a hand chain hoist and a jack. The gantry crane is used to change the horizontal position of the jack, and the hand chain hoist is installed on the gantry crane to suspend the jack and change the height of the jack. When tensioning the steel in the prefabricated parts, the gantry crane is first placed on one side of the end of the prefabricated part, and then the gantry crane is used to change the horizontal position of the jack, and the hand chain hoist is used to adjust the height of the jack, so that the jack suspended in the air can be opposite to the end position of the steel and at the same height. At this time, the jack is attached to one side of the end of the steel. Then the jack can be pushed to connect the jack to the part of the steel exposed to the concrete. When connecting the jack to the steel, it is necessary to keep the jack horizontal to prevent the jack from bending the steel. After the jack is connected to the steel, it can be fixed on the steel by using its own weight and the suspension effect of the hand winch. After starting the jack, the steel will be tightly held inside the jack and pulled along the length of the steel, thereby realizing the process of tensioning the steel.

[0005] However, for prefabricated parts with cantilevers extending outward at both ends, such as box beams with cantilevers, the cantilevers are located outside the ends of the steel in the length direction of the steel. Even if the gantry crane and hand chain hoist are used to make the jack suspended in the air relative to the end of the steel and at the same height, due to the obstruction of the cantilever, there will be a large distance between the jack and the end of the steel in the length direction of the steel. At this time, it is necessary to use manual handling to connect the jack to the part of the steel exposed to the concrete. Therefore, in the existing process of tensioning the steel in the prefabricated parts, the labor intensity of the construction workers is large and the construction efficiency is low. Summary of the invention

[0006] The object of the present invention is to provide a prefabricated steel tensioning device to alleviate the problem in the prior art that when the steel in a prefabricated part with cantilevers at both ends is tensioned by the post-tensioning method, even if a gantry crane and a hand winch are used to make the jack suspended in the air relative to the end of the steel and at the same height, due to the obstruction of the cantilever, there will be a large distance between the jack and the end of the steel in the length direction of the steel. At this time, it is necessary to manually carry the jack to connect the jack to the part of the steel exposed to the concrete, which not only leads to a high labor intensity for the construction workers but also leads to a low construction efficiency. Technical problems.

[0007] The prefabricated steel material tensioning device provided by the present invention comprises a support frame, a support arm and a tensioning driving member;

[0008] The prefabricated steel material tensioning device comprises a support frame, a support arm and a tensioning driving member;

[0009] The support frame is used to be placed on one side of the steel material to be tensioned at the end of the prefabricated part, the support arm is slidably connected to the support frame, and the tensioning driving member is installed on the support arm; the support arm can move on the support frame to drive the tensioning driving member to move in the extension direction of the steel material to be tensioned at the end of the prefabricated part;

[0010] The position where the tensioning drive is installed on the support arm can pass over the cantilever at the end of the prefabricated part and approach the steel to be tensioned during the movement of the support arm. The tensioning drive is used to pull the steel to be tensioned along the extension direction of the steel to be tensioned.

[0011] Further, the support frame includes a top frame, and the support arm includes a connecting rod and a support rod, and the support rod is connected to make the support arm L-shaped;

[0012] The connecting rod is slidably connected to the top frame; the supporting rod is located below the top frame and along the length direction of the prefabricated part, the supporting rod is located on the side of the connecting rod close to the prefabricated part;

[0013] The tensioning drive is connected to the support rod.

[0014] Furthermore, a first guide rail is provided on the top frame along the length direction of the prefabricated part, and the connecting rod is slidably connected to the first guide rail.

[0015] Furthermore, a pulley is connected between the connecting rod and the first guide rail, the pulley is connected to the connecting rod, and the pulley is slidably connected to the first guide rail.

[0016] A connecting ring is provided on one side of the pulley, and the connecting ring is located above the first guide rail;

[0017] The prefabricated steel material tensioning device also includes a limiting ring, which is sleeved on the first guide rail and connected to the connecting ring, and the limiting ring can move on the first guide rail along with the pulley.

[0018] Furthermore, the connecting rod is sleeved in the pulley, the connecting rod can move in the pulley along the length direction of the connecting rod, and the position of the connecting rod can be fixed.

[0019] Furthermore, the prefabricated steel tensioning device also includes a pulley assembly, which is installed on the pulley and connected to the tensioning drive member. The pulley assembly is used to drive the tensioning drive member to rise or fall, and to fix the position of the tensioning drive member and the connecting rod.

[0020] Furthermore, a moving member is provided on the top frame along the length direction of the prefabricated member, and the first guide rail is fixed on the moving member;

[0021] Two second guide rails parallel to each other are arranged on the top frame along the width direction of the prefabricated part, one end of the moving part is slidably connected to one of the second guide rails, and the other end of the moving part is slidably connected to the other second guide rail.

[0022] Furthermore, the top frame is quadrilateral and annular, and the two second guide rails are respectively arranged on two opposite frames of the top frame;

[0023] The moving member is rectangular and annular, the first guide rail is arranged on the long side of the moving member, and the two short sides of the moving member are respectively slidably connected to the two second guide rails;

[0024] The prefabricated steel tensioning device also includes a limit frame, which is connected to any short side of the moving part. The limit frame successively passes around the second guide rail located below the short side of the moving part and the frame of the top frame located below the second guide rail, and then is located below the frame of the top frame below the second guide rail. The limit frame can move on the second guide rail with the moving part.

[0025] Furthermore, the support frame also includes a vertical frame and a bottom frame;

[0026] The vertical frame is located below the top frame and connected to a side of the top frame away from the prefabricated component; the bottom frame and the top frame are located on the same side of the vertical frame and connected below the vertical frame.

[0027] The prefabricated steel material tensioning device provided by the present invention can produce the following beneficial effects:

[0028] The prefabricated steel tensioning device provided by the present invention comprises a support frame, a support arm and a tensioning drive, and the support arm is slidably connected to the support frame. When the steel in the prefabricated part is tensioned by the post-tensioning method, the support frame can be first placed on one side of the steel to be tensioned at the end of the prefabricated part, and the tensioning drive can be located in the extension direction of the steel to be tensioned at the end of the prefabricated part. Then, the support arm can be slid on the support frame toward the direction close to the prefabricated part. During the sliding process, the support arm will drive the tensioning drive to approach the prefabricated part along the extension direction of the steel to be tensioned. When the support arm moves to a certain distance, it can drive the tensioning drive to cross the cantilever at the end of the prefabricated part. The tensioning drive member can be a jack. At this time, the support arm and the tensioning drive member are continuously moved toward the direction close to the prefabricated part, so that the tensioning drive member can reach the position of the end of the steel material to be tensioned in the prefabricated part. At this time, the support arm is continuously used to push the tensioning drive member onto the steel material to be tensioned, or the tensioning drive member is manually moved onto the steel material to be tensioned, so that the tensioning drive member can be sleeved on the steel material to be tensioned. Under the support of the support arm, the tensioning drive member will not bend the steel material to be tensioned. After the tensioning drive member is started, the inside of the tensioning drive member will hold the steel material to be tensioned and tension the steel material to be tensioned along the extension direction of the steel material to be tensioned. Finally, the clamp fixed on the prefabricated part can be used to clamp the tensioned steel material to be tensioned, so that the steel material remains in the tensioned state, and the tensioning process of the steel material in the prefabricated part can be completed.

[0029] Compared with the prior art, the prefabricated steel tensioning device provided by the present invention can use the support arm slidably connected to the support frame to drive the tensioning drive to move along the extension direction of the steel to be tensioned in the prefabricated part, and can make the steel to be tensioned pass over the cantilever at the end of the prefabricated part and reach the position of the end of the steel to be tensioned in the prefabricated part during the process of moving close to the prefabricated part. Therefore, for the prefabricated steel tensioning device provided by the present invention, when the tensioning drive is close to the steel to be tensioned, the tensioning drive will not be blocked by the cantilever at the end of the prefabricated part, and there will be no large spacing between the tensioning drive and the end of the steel in the length direction of the steel. At this time, the tensioning drive can continue to be pushed onto the steel to be tensioned by using the support arm, or the tensioning drive can be manually moved to the steel to be tensioned to be sleeved on the steel to be tensioned, without the need to manually carry the tensioning drive to sleeve the tensioning drive on the steel to be tensioned, thereby reducing the labor intensity of construction personnel and improving construction efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A schematic diagram of the structure of a prefabricated steel material tensioning device, a prefabricated part and a steel material to be tensioned provided in an embodiment of the present invention;

[0032] Figure 2 for Figure 1 A top view of the prefabricated steel tensioning device;

[0033] Figure 3 for Figure 1 A schematic diagram of the structure of the prefabricated steel tensioning device;

[0034] Figure 4 Another structural schematic diagram of the prefabricated steel material tensioning device provided in an embodiment of the present invention;

[0035] Figure 5 Another structural schematic diagram of the prefabricated steel material tensioning device provided in an embodiment of the present invention;

[0036] Figure 6 for Figure 5 A magnified schematic diagram of part A in FIG.

[0037] Icons: 1-support frame; 10-top frame; 100-first guide rail; 101-moving part; 1010-roller; 102-second guide rail; 11-limiting head; 12-vertical frame; 13-bottom frame; 14-support plate; 15-diagonal brace; 2-support arm; 20-connecting rod; 21-support rod; 3-tensioning drive member; 4-prefabricated part; 40-steel to be tensioned; 41-cantilever; 5-pulley; 50-connecting ring; 51-wheel; 52-lifting ring; 53-pulley; 6-limiting ring; 7-limiting frame. DETAILED DESCRIPTION

[0038] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than 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.

[0039] Example:

[0040] like Figure 1-Figure 3As shown, the prefabricated steel material tensioning device provided in this embodiment includes a support frame 1, a support arm 2 and a tensioning drive 3, wherein the support frame 1 is used to be placed on one side of the steel material 40 to be tensioned at the end of the prefabricated member 4, the support arm 2 is slidably connected to the support frame 1, and the tensioning drive 3 is installed on the support arm 2. The support arm 2 can move on the support frame 1 to drive the tensioning drive 3 to move in the extension direction of the steel material 40 to be tensioned at the end of the prefabricated member 4. The position of the support arm 2 where the tensioning drive 3 is installed can pass over the cantilever 41 at the end of the prefabricated member 4 during the movement of the support arm 2 and then approach the steel material 40 to be tensioned, and the tensioning drive 3 is used to pull the steel material 40 to be tensioned along the extension direction of the steel material 40 to be tensioned.

[0041] The prefabricated part 4 may be a prefabricated box beam, a prefabricated I-beam, a prefabricated plate, etc. with a cantilever 41. The steel material 40 to be tensioned may be each bundle of steel strands, steel bars, etc., composed of a plurality of steel strands.

[0042] like Figure 1 As shown, when the steel in the prefabricated part 4 is tensioned by the post-tensioning method, the support frame 1 can be placed on one side of the steel to be tensioned 40 at the end of the prefabricated part 4, and the tensioning driving member 3 can be located in the extension direction of the steel to be tensioned 40 at the end of the prefabricated part 4. Then, the support arm 2 can be slid on the support frame 1 toward the direction close to the prefabricated part 4. During the sliding process, the support arm 2 will drive the tensioning driving member 3 to approach the prefabricated part 4 along the extension direction of the steel to be tensioned 40. When the support arm 2 moves to a certain distance, it can drive the tensioning driving member 3 to cross the cantilever 41 at the end of the prefabricated part 4.

[0043] The tensioning drive member 3 can be a jack. Furthermore, the tensioning drive member 3 can also be a jack. The support arm 2 and the tensioning drive member 3 are continuously moved toward the direction close to the preform 4, so that the tensioning drive member 3 can reach the end of the steel material 40 to be tensioned in the preform 4. At this time, the tensioning drive member 3 is continuously pushed onto the steel material 40 to be tensioned by using the support arm 2, or the tensioning drive member 3 is manually moved onto the steel material 40 to be tensioned, so that the tensioning drive member 3 can be sleeved onto the steel material 40 to be tensioned. Under the support of the support arm 2, the tensioning drive member 3 will not bend the steel material 40 to be tensioned. After the tensioning drive member 3 is started, the interior of the tensioning drive member 3 will hold the steel material 40 to be tensioned and tension the steel material 40 to be tensioned along the extension direction of the steel material 40 to be tensioned.

[0044] Finally, the tensioned steel material 40 to be tensioned can be clamped by a clamp fixed on the prefabricated part 4 so that the steel material remains in a tensioned state, and the tensioning process of the steel material in the prefabricated part 4 can be completed.

[0045] Compared with the prior art, the prefabricated part 4 steel tensioning device provided in this embodiment can utilize the support arm 2 slidably connected to the support frame 1 to drive the tensioning driving member 3 to move along the extension direction of the steel 40 to be tensioned in the prefabricated part 4, and can make the steel 40 to be tensioned pass over the cantilever 41 at the end of the prefabricated part 4 and reach the position of the end of the steel 40 to be tensioned in the prefabricated part 4 during the process of moving close to the prefabricated part 4. Therefore, for the prefabricated steel tensioning device provided in this embodiment, when the tensioning driving member 3 approaches the steel to be tensioned 40, the tensioning driving member 3 will not be hindered by the cantilever 41 on the end of the prefabricated member 4, and there will be no large distance between the tensioning driving member 3 and the end of the steel in the length direction of the steel. At this time, the support arm 2 can continue to be used to push the tensioning driving member 3 onto the steel to be tensioned 40, or the tensioning driving member 3 only needs to be manually moved onto the steel 40 to be tensioned, so that the tensioning driving member 3 can be sleeved on the steel to be tensioned 40, without the need to manually carry the tensioning driving member 3 to sleeve the tensioning driving member 3 on the steel to be tensioned 40, thereby reducing the labor intensity of construction personnel and improving construction efficiency.

[0046] It can be seen that the prefabricated part 4 steel tensioning device provided in this embodiment alleviates the problem existing in the prior art that when the steel in the prefabricated part 4 with cantilevers 41 at both ends is tensioned by the post-tensioning method, even if a gantry crane and a hand winch are used to make the jack suspended in the air relative to the end of the steel and at the same height, due to the obstruction of the cantilever 41, there will be a large distance between the jack and the end of the steel in the length direction of the steel. At this time, it is necessary to manually carry the jack to connect the jack to the part of the steel exposed to the concrete, which not only leads to a high labor intensity for the construction workers but also leads to a technical problem of low construction efficiency.

[0047] When the tensioning driving member 3 is a jack, in order not to affect the use of the jack, the support arm 2 is connected to the outer shell of the jack.

[0048] In this embodiment, the tensioning driving member 3 may also be a hydraulic cylinder. When the hydraulic cylinder approaches the steel material 40 to be tensioned, the hydraulic cylinder in the extended state is connected to the end of the steel material 40 to be tensioned, and then the hydraulic cylinder is shortened. After the hydraulic cylinder is shortened, the steel material 40 to be tensioned is pulled along the extension direction of the tensioning driving member 3.

[0049] It should be noted that the hydraulic cylinder is suitable for prefabricated parts 4 with shorter lengths of steel materials 40 to be tensioned. For prefabricated box beams, since the lengths of steel materials 40 to be tensioned are longer, the bonding force between the steel materials 40 to be tensioned and concrete is greater, so in this embodiment, the tensioning drive member 3 is preferably a jack.

[0050] like Figure 3-Figure 5As shown, the support frame 1 includes a top frame 10, and the support arm 2 includes a connecting rod 20 and a supporting rod 21, and the connecting rod 20 and the supporting rod 21 are connected so that the support arm 2 is L-shaped. The connecting rod 20 is slidably connected to the top frame 10. The supporting rod 21 is located below the top frame 10, and along the length direction of the prefabricated member 4, the supporting rod 21 is located on the side of the connecting rod 20 close to the prefabricated member 4. The tensioning driving member 3 is connected to the supporting rod 21.

[0051] Along the length direction of the prefabricated part 4, the support rod 21 is located on the side of the connecting rod 20 close to the prefabricated part 4, so that when the connecting rod 20 slides on the top frame 10 toward the prefabricated part 4, it can extend out of the support frame 1 and pass over the cantilever 41 on the end of the prefabricated part 4 and approach the steel 40 to be tensioned in the prefabricated part 4.

[0052] Further, such as Figure 1 As shown, in this embodiment, the top frame 10 is preferably higher than the cantilever 41 of the prefabricated component 4 .

[0053] like Figure 3-Figure 5 As shown, in this embodiment, the connecting rod 20 and the supporting rod 21 are preferably in a straight line shape, and the connecting rod 20 and the supporting rod 21 are vertically connected to form the supporting arm 2 into an L shape. In the process of using the prefabricated steel material tensioning device 4, the length direction of the supporting rod 21 in the L-shaped supporting arm 2 is parallel to the length direction of the steel material 40 to be tensioned, and the length direction of the connecting rod 20 is perpendicular to the length direction of the steel material 40 to be tensioned.

[0054] like Figure 5 As shown, along the length direction of the preform 4 , a first guide rail 100 is provided on the top frame 10 , and the connecting rod 20 is slidably connected to the first guide rail 100 .

[0055] The rod body of the connecting rod 20 can be slidably connected to the first guide rail 100. After the rod body of the connecting rod 20 slides on the first guide rail 100 along the length direction of the preform 4, it can drive the support rod 21 and the tensioning drive member 3 on the support rod 21 to move in the extension direction of the steel 40 to be tensioned.

[0056] like Figure 6 As shown, a pulley 5 is connected between the connecting rod 20 and the first guide rail 100 , the pulley 5 is connected to the connecting rod 20 , and the pulley 5 is slidably connected to the first guide rail 100 .

[0057] The pulley 5 is used to be connected to the connecting rod 20 and to drive the connecting rod 20 to move on the first guide rail 100 .

[0058] Further, such as Figure 6As shown, the bottom end of the pulley 5 that is slidably connected to the first guide rail 100 may be provided with a wheel 51 , which is located on the first guide rail 100 and can roll on the first guide rail 100 , thereby driving the pulley 5 to move on the first guide rail 100 .

[0059] like Figure 6 As shown, in this embodiment, the pulley 5 is preferably a cubic frame structure formed by connecting a plurality of straight rods.

[0060] like Figure 6 As shown, a connecting ring 50 is provided on one side of the pulley 5, and the connecting ring 50 is located above the first guide rail 100. The prefabricated part 4 steel material tensioning device provided in this embodiment also includes a limiting ring 6, which is sleeved on the first guide rail 100 and connected to the connecting ring 50, and the limiting ring 6 can move on the first guide rail 100 with the pulley 5.

[0061] The limiting ring 6 is used to cooperate with the connecting ring 50 to prevent the pulley 5 from being separated from the first guide rail 100, thereby improving the stability of the pulley 5 during the movement process on the first guide rail 100.

[0062] like Figure 5 As shown, in order to make the movement of the pulley 5 on the first guide rail 100 smoother, the present embodiment preferably has two first guide rails 100, and the two first guide rails 100 are arranged in parallel on the top frame 10. At this time, the connecting rod 20 passes through the gap between the two first guide rails 100 and is connected with the pulley 5.

[0063] Furthermore, two rows of wheels 51 may be provided at the bottom of the pulley 5 , and each row of wheels 51 is located on a first guide rail 100 .

[0064] like Figure 6 As shown, the connecting ring 50 may be triangular, and the limiting ring 6 may be rectangular. Further, the bottom of the connecting ring 50 may also be provided with wheels 51 that can roll on the first guide rail 100 .

[0065] like Figure 6 As shown, the connecting rod 20 is sleeved in the pulley 5, the connecting rod 20 can move in the pulley 5 along the length direction of the connecting rod 20, and the position of the connecting rod 20 can be fixed.

[0066] When the connecting rod 20 moves along the length direction of the connecting rod 20 in the pulley 5, it can drive the support rod 21 and the tensioning drive member 3 to rise and fall, and then the height of the support rod 21 and the tensioning drive member 3 can be adjusted, so that the tensioning drive member 3 can perform tensioning operations on the steel materials 40 to be tensioned at different heights in turn.

[0067] like Figure 2As shown, a pulley 53 is provided at the position where the pulley 5 is sleeved with the connecting rod 20, and the side wall of the connecting rod 20 abuts against the pulley 53. When the connecting rod 20 moves along the length direction of the connecting rod 20 on the pulley 5, the pulley 53 can be driven to rotate. The pulley 53 is used to convert the sliding friction between the connecting rod 20 and the pulley 5 into rolling friction, so that the movement process of the connecting rod 20 is smoother.

[0068] Along the length direction of the connecting rod 20, a plurality of through holes may be arranged at intervals on the rod body of the connecting rod 20. When the connecting rod 20 moves, in order to fix the position of the connecting rod 20, a pin may be inserted into the through hole on the portion of the connecting rod 20 that is higher than the pulley 53, and the pin may abut against the top end of the pulley 5.

[0069] To facilitate fixing the position of the connecting rod 20, the present embodiment preferably also includes a pulley 53 assembly, which is mounted on the trolley 5 and connected to the tensioning drive member 3. The pulley 53 assembly is used to drive the tensioning drive member 3 to rise or fall, and to fix the position of the tensioning drive member 3 and the connecting rod 20.

[0070] The pulley 53 assembly can adopt an existing hand chain hoist or electric hoist, or a fixed pulley 53 with a rope wound around it.

[0071] like Figure 4 As shown, in order to install the pulley 53 assembly on the trolley 5, a lifting ring 52 may be provided on the trolley 5, and the pulley 53 assembly may be connected to the lifting ring 52 by a chain or a hook.

[0072] like Figure 5 As shown, a moving member 101 is provided on the top frame 10 along the length direction of the preform 4, and a first guide rail 100 is fixed on the moving member 101. Two second guide rails 102 parallel to each other are provided on the top frame 10 along the width direction of the preform 4, one end of the moving member 101 is slidably connected to one of the second guide rails 102, and the other end of the moving member 101 is slidably connected to the other second guide rail 102.

[0073] The moving member 101 can move along the width direction of the preform 4 on the second guide rail 102. Since the first guide rail 100 is fixed on the moving member 101, and the pulley 5 is slidably connected to the first guide rail 100, when the moving member 101 moves along the width direction of the preform 4 on the second guide rail 102, the moving member 101 can drive the first guide rail 100 and the pulley 5 to move along the width direction of the preform 4. Since the connecting rod 20 is connected to the pulley 5, and the support rod 21 is connected to the connecting rod 20, when the moving member 101 moves along the width direction of the preform 4 on the second guide rail 102, the support rod 21 and the tension driving member 3 on the support rod 21 can be driven by the moving member 101 to move along the width direction of the preform 4.

[0074] The movable member 101 and the second guide rail 102 can be used together to change the position of the tensioning drive member 3 in the width direction of the preform 4, so that the tensioning drive member 3 can perform tensioning operations on the steel materials 40 to be tensioned at different positions on the same horizontal plane in the preform 4 in sequence without changing the position of the supporting frame 1.

[0075] When a limit ring 6 is connected between the pulley 5 and the first guide rail 100 , the process of the movable member 101 driving the first guide rail 100 and the pulley 5 to move along the width direction of the preform 4 will be smoother, so the present embodiment preferably includes the limit ring 6 .

[0076] The prefabricated steel tensioning device provided in this embodiment utilizes the cooperation between the pulley 5 and the first guide rail 100, the cooperation between the second guide rail 102 and the movable member 101, and the socket relationship between the connecting rod 20 and the pulley 5 to change the position of the tensioning drive member 3 in the three-dimensional space, and then the position of the tensioning drive member 3 can be adjusted on the support frame 1 so that the tensioning drive member 3 is located in turn in the extension direction of the steel 40 to be tensioned at different positions, and is close to the steel 40 to be tensioned in the extension direction, so that the tensioning drive member 3 can perform tensioning operations on the steel 40 to be tensioned at different positions in turn.

[0077] It can be seen that the cooperation between the pulley 5 and the first guide rail 100, the cooperation between the second guide rail 102 and the movable member 101, and the socket connection between the connecting rod 20 and the pulley 5 can enhance the flexibility and convenience of use of the prefabricated part 4 steel tensioning device provided in this embodiment.

[0078] like Figure 5 As shown, the top frame 10 is a quadrilateral and annular, and two second guide rails 102 are respectively arranged on two opposite frames of the top frame 10. The moving member 101 is a rectangle and annular, and the first guide rail 100 is arranged on the long side of the moving member 101, and the two short sides of the moving member 101 are slidably connected to the two second guide rails 102 respectively.

[0079] Furthermore, the prefabricated part 4 steel tensioning device provided in this embodiment also includes a limit frame 7, and a limit frame 7 is connected to any short side of the movable part 101. The limit frame 7 successively bypasses the second guide rail 102 located below the short side of the movable part 101 and the frame of the top frame 10 located below the second guide rail 102, and then moves below the frame of the top frame 10 located below the second guide rail 102. The limit frame 7 can move on the second guide rail 102 along with the movable part 101.

[0080] The moving member 101 is rectangular and annular so that two parallel first guide rails 100 can be arranged on the moving member 101 . The two parallel first guide rails 100 can improve the stability of the moving process of the pulley 5 .

[0081] The limiting frame 7 is used to prevent the moving member 101 from being separated from the second guide rail 102 in the vertical direction, and can improve the stability of the moving member 101 during the movement on the second guide rail 102 .

[0082] The limiting frame 7 may be annular or semi-annular. When the limiting frame 7 is annular, the limiting frame 7 is sleeved on the short side of the moving member 101 , the second guide rail 102 and the frame of the top frame 10 .

[0083] like Figure 5 As shown, the limiting frame 7 in this embodiment is semi-circular, and the short side of the moving member 101, the second guide rail 102 and the frame of the top frame 10 are located in the limiting frame 7. In order not to hinder the limiting frame 7 from moving along with the moving member 101 on the second guide rail 102, a gap may be left between the inner side wall of the limiting frame 7 and the outer side wall of the frame of the top frame 10, and the width of the gap may be 5 mm.

[0084] The moving member 101 can be made of steel pipe, and the limiting ring 6 and the limiting frame 7 can be made of steel pipe with a rectangular radial cross section commonly used in construction sites. The radial cross section of the steel pipe in the limiting frame 7 can have a size of 30mm×30mm×3mm.

[0085] In order to improve the installation stability of the limiting frame 7 , the limiting frame 7 can be welded to the short side of the moving part 101 .

[0086] like Figure 5 and Figure 6 As shown, a roller 1010 may be installed at the bottom of the short side of the moving member 101 , and the roller 1010 can roll on the second guide rail 102 , thereby driving the moving member 101 to move on the second guide rail 102 .

[0087] Further, such as Figure 5 As shown, the first guide rail 100 and the second guide rail 102 can both be made of steel bars, and both ends of the first guide rail 100 and the second guide rail 102 can be provided with a limit head 11 bent upward. The limit head 11 on the first guide rail 100 is used to prevent the pulley 5 from sliding off the first guide rail 100, thereby improving the use stability of the pulley 5. The limit head 11 on the second guide rail 102 is used to prevent the moving member 101 from sliding off the second guide rail 102, thereby improving the use stability of the moving member 101.

[0088] Furthermore, when the first guide rail 100 and the second guide rail 102 are both made of steel bars, an annular groove is provided along the circumference of the wheel 51 below the pulley 5, and an annular groove is provided along the circumference of the roller 1010 below the moving member 101. The groove on the wheel 51 is used to match the first guide rail 100, and can improve the stability of the wheel 51 when rolling on the first guide rail 100. The groove on the roller 1010 is used to match the second guide rail 102, and can improve the stability of the roller 1010 when rolling on the second guide rail 102.

[0089] Furthermore, in order to improve the stability of the wheel 51 when rolling on the first guide rail 100 and the stability of the roller 1010 when rolling on the second guide rail 102, the wheel 51 and the roller 1010 are preferably directional wheels.

[0090] like Figure 5 As shown, the support frame 1 further includes a vertical frame 12 and a bottom frame 13, wherein the vertical frame 12 is located below the top frame 10 and connected to a side of the top frame 10 away from the prefabricated member 4. The bottom frame 13 is located on the same side of the vertical frame 12 as the top frame 10 and connected below the vertical frame 12.

[0091] In this embodiment, the side of the support frame 1 formed by connecting the top frame 10, the vertical frame 12 and the bottom frame 13 that is close to the end of the preform 4 is not blocked, so that the support rod 21 can drive the tensioning drive 3 to extend out of the support frame 1 and approach the preform 4.

[0092] In addition, the vertical frame 12 is located below the top frame 10 and connected to the side of the top frame 10 away from the prefabricated part 4, and the bottom frame 13 and the top frame 10 are located on the same side of the vertical frame 12, which can improve the stability of the support frame 1, thereby enabling the support frame 1 to stably support the tensioning drive member 3.

[0093] like Figure 5 As shown, the frame provided in this embodiment may further include a support plate 14, which is mounted on the bottom frame 13 and located below the tensioning drive 3. The support plate 14 is used to support the tensioning drive 3 when the tensioning drive 3 is not in use to reduce the tension on the support arm 2.

[0094] like Figure 5 As shown, the frame provided in this embodiment may further include a diagonal brace 15 , which is installed between the top frame 10 and the bottom frame 13 to improve the structural stability of the support frame 1 .

[0095] In practical applications, the support frame 1 provided in this embodiment can be made of steel pipes with a rectangular radial cross section commonly used in construction sites. Further, the radial cross section of the steel pipe has a size of 100 mm×100 mm×5 mm.

[0096] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A prefabricated steel tensioning device, characterized in that: The prefabricated steel material tensioning device comprises a support frame, a support arm and a tensioning driving member; The support frame is used to be placed on one side of the steel material to be tensioned at the end of the prefabricated part, the support arm is slidably connected to the support frame, and the tensioning driving member is installed on the support arm; the support arm can move on the support frame to drive the tensioning driving member to move in the extension direction of the steel material to be tensioned at the end of the prefabricated part; The position of the support arm where the tensioning driving member is installed can approach the steel material to be tensioned after passing over the cantilever at the end of the prefabricated member during the movement of the support arm, and the tensioning driving member is used to pull the steel material to be tensioned along the extension direction of the steel material to be tensioned; The support frame includes a top frame, the support arm includes a connecting rod and a support rod, the connecting rod and the support rod are connected to make the support arm L-shaped; The connecting rod is slidably connected to the top frame; the supporting rod is located below the top frame and along the length direction of the prefabricated part, the supporting rod is located on a side of the connecting rod close to the prefabricated part; The tensioning driving member is connected to the supporting rod.

2. The prefabricated steel material tensioning device according to claim 1, characterized in that: A first guide rail is provided on the top frame along the length direction of the prefabricated part, and the connecting rod is slidably connected to the first guide rail.

3. The prefabricated steel material tensioning device according to claim 2, characterized in that: A pulley is connected between the connecting rod and the first guide rail. The pulley is connected to the connecting rod and is slidably connected to the first guide rail.

4. The prefabricated steel material tensioning device according to claim 3, characterized in that: A connecting ring is provided on one side of the pulley, and the connecting ring is located above the first guide rail; The prefabricated steel material tensioning device further comprises a limiting ring, which is sleeved on the first guide rail and connected to the connecting ring, and the limiting ring can move on the first guide rail along with the pulley.

5. The prefabricated steel material tensioning device according to claim 3, characterized in that: The connecting rod is sleeved in the pulley, the connecting rod can move in the pulley along the length direction of the connecting rod, and the position of the connecting rod can be fixed.

6. The prefabricated steel material tensioning device according to claim 5, characterized in that: The prefabricated steel tensioning device also includes a pulley assembly, which is installed on the pulley and connected to the tensioning drive member. The pulley assembly is used to drive the tensioning drive member to rise or fall, and to fix the positions of the tensioning drive member and the connecting rod.

7. The prefabricated steel material tensioning device according to claim 2, characterized in that: A moving part is arranged on the top frame along the length direction of the prefabricated part, and the first guide rail is fixed on the moving part; Along the width direction of the preform, two second guide rails parallel to each other are arranged on the top frame, one end of the moving member is slidably connected to one of the second guide rails, and the other end of the moving member is slidably connected to the other second guide rail.

8. The prefabricated steel material tensioning device according to claim 7, characterized in that: The top frame is quadrilateral and annular, and the two second guide rails are respectively arranged on two opposite frames of the top frame; The moving member is rectangular and annular, the first guide rail is arranged on the long side of the moving member, and the two short sides of the moving member are respectively slidably connected to the two second guide rails; The prefabricated steel tensioning device also includes a limit frame, and a limit frame is connected to any short side of the movable member. The limit frame successively passes by the second guide rail below the short side of the movable member and the frame of the top frame below the second guide rail, and then passes below the frame of the top frame below the second guide rail. The limit frame can move on the second guide rail along with the movable member.

9. The prefabricated steel material tensioning device according to any one of claims 1 to 8, characterized in that: The support frame also includes a vertical frame and a bottom frame; The vertical frame is located below the top frame and connected to a side of the top frame away from the prefabricated component; the bottom frame and the top frame are located on the same side of the vertical frame and connected below the vertical frame.

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