jacks for tensioning precast beams

Abstract

This utility model belongs to the field of precast beam tensioning technology, specifically providing a jack hanger for precast beam tensioning, including a support frame, a mounting plate, a first lifting mechanism, a second lifting mechanism, and a support plate. The support frame includes uprights, crossbars, and a central bar. The first lifting mechanism drives the mounting plate to move up and down, and the second lifting mechanism drives the tensioning jack to rise and fall. When tensioning the precast beam, the first lifting mechanism adjusts the mounting plate to the top of the support frame to tension the steel strands on the precast beam. When not in use, the first lifting mechanism adjusts the mounting plate to the bottom of the support frame, and the support plate is placed above the central bar. The upper surfaces of the mounting plate and the support plate respectively form storage spaces, allowing the hanger to be used as a storage rack, combining lifting and storage functions, thus saving indoor space in the laboratory.

Description

Technical Field

[0001] This application belongs to the field of precast beam tensioning technology, specifically a jack hanger for precast beam tensioning. Background Technology

[0002] When conducting tension tests on precast beams in the laboratory, jacks need to be fixed to the steel strands to apply force and perform the tensioning operation. Current technology typically uses a hoist and electric hoist to lift the jacks to a height that allows them to be moved horizontally relative to the precast beam's steel strands.

[0003] The function of the hanger is to support and move the jacks. To ensure stable support during tensioning operations, the hanger typically employs a frame structure, resulting in a relatively large size. Since tensioning of precast beams is usually conducted on outdoor construction sites with ample space, there are fewer restrictions on the hanger's size, and it's easier to store them in a designated area when not in use. Therefore, most hangers in existing technologies are constructed from welded steel and are non-removable and non-adjustable. However, when conducting tensioning tests on precast beams in a laboratory setting, the non-removable hanger, being indoors, can only be stored in a corner when not in use for extended periods, occupying a significant amount of space. Utility Model Content

[0004] Based on the above-mentioned technical problems, this application provides a jack hanger for tensioning precast beams to solve the technical problem that the hangers in the prior art occupy a large space when stored in the laboratory.

[0005] To achieve the above objectives, the technical solution adopted in this application is: to provide a jack hanger for tensioning precast beams, comprising:

[0006] A support frame includes uprights, crossbars, and intermediate bars. Multiple uprights are arranged in a rectangular array, and crossbars are horizontally connected between the ends of two corresponding uprights. The multiple crossbars and uprights together form a rectangular frame structure. Intermediate bars are horizontally connected between the middle sections of two corresponding uprights. The intermediate bars are arranged in pairs, with two intermediate bars in the same pair positioned opposite each other on both sides of the support frame.

[0007] The mounting plate is slidably fitted onto the upright.

[0008] A first lifting mechanism is provided on the support frame and is used to drive the mounting plate to move vertically along the upright;

[0009] A second lifting mechanism is located at the bottom of the mounting plate, and a tension jack is connected to the lifting end of the second lifting mechanism; and

[0010] A tray is detachably mounted above the intermediate rod.

[0011] In one possible implementation, the bottom of the pole is provided with a movable wheel, and at least one of the movable wheels is provided with a braking unit.

[0012] In one possible implementation, the first lifting mechanism includes a winch located on top of the support frame, with a rope wound around its winding shaft and the free end of the rope connected to the mounting plate.

[0013] In one possible implementation, two winches are arranged opposite to the support frame, the ropes of the two winches are respectively connected to both ends of the mounting plate, and a drive shaft is coaxially connected between the winding shafts of the two winches, with a first drive motor driving the drive shaft.

[0014] In one possible implementation, the mounting plate is provided with sliding sleeves at its four corners. Each sliding sleeve has a guide hole that slides with the upright. The side wall of the sliding sleeve is provided with a vertically penetrating clearance groove, which corresponds to the connection position of the intermediate rod and the upright.

[0015] In one possible implementation, the second lifting mechanism is an electric hoist or a manual hoist.

[0016] In one possible implementation, the jack hanger for tensioning the precast beam further includes an adjustment mechanism, the adjustment mechanism comprising:

[0017] A guide rail is provided on the lower surface of the mounting plate along the axial direction of the tensioning jack;

[0018] A sliding block, slidably fitted to the guide rail, and a second lifting mechanism disposed on the sliding block; and

[0019] A translation drive mechanism is used to drive the sliding block to move along the guide rail.

[0020] In one possible implementation, the translation drive mechanism includes:

[0021] A lead screw is disposed on the lower surface of the mounting plate, parallel to the length direction of the guide rail; the sliding block has a mounting hole that threadedly engages with the lead screw; and

[0022] The second drive motor is used to drive the lead screw to rotate around its own central axis.

[0023] In one possible implementation, the tray has a hook on one side, the tray has a horizontal posture supporting the intermediate rod, and a vertical posture hanging on one of the intermediate rods via the hook.

[0024] In one possible implementation, the intermediate rods are arranged in multiple groups at intervals from top to bottom, and the number of trays is the same as the number of groups of intermediate rods.

[0025] Compared with existing technologies, the advantages of the jack hanger for tensioning precast beams provided in this application are:

[0026] The precast beam tensioning jack hanger provided in this application includes a support frame, a mounting plate, a first lifting mechanism, a second lifting mechanism, and a support plate. The support frame includes uprights, horizontal bars, and a central bar. The first lifting mechanism drives the mounting plate to move up and down, and the second lifting mechanism drives the tensioning jack to rise and fall. When tensioning the precast beam, the first lifting mechanism adjusts the mounting plate to the top of the support frame to tension the steel strands on the precast beam. When not in use, the first lifting mechanism adjusts the mounting plate to the bottom of the support frame, and the support plate is placed above the central bar. The upper surfaces of the mounting plate and the support plate respectively form storage spaces. The hanger can be used as a storage rack when not in use, combining lifting and storage functions, thus saving laboratory space. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 A perspective view of the jack hanger for tensioning precast beams provided in the embodiments of this application when the support plate is in a vertical position;

[0029] Figure 2 The three-dimensional structure of the precast beam tensioning jack hanger provided in the embodiments of this application, behind the hidden support plate. Figure 1 ;

[0030] Figure 3 The three-dimensional structure of the precast beam tensioning jack hanger provided in the embodiments of this application, behind the hidden support plate. Figure 2 ;

[0031] Figure 4 A perspective view of the jack hanger for tensioning precast beams provided in the embodiments of this application when the support plate is in a horizontal position;

[0032] Explanation of reference numerals in the attached figures:

[0033] 10. Support frame; 11. Upright pole; 12. Horizontal bar; 13. Intermediate pole; 14. Moving wheel; 20. Mounting plate; 21. Sliding sleeve; 22. Lifting ring; 30. First lifting mechanism; 31. Winch; 311. Rope; 32. Drive shaft; 33. First drive motor; 40. Second lifting mechanism; 50. Adjusting mechanism; 51. Guide rail; 52. Sliding block; 53. Translation drive mechanism; 531. Lead screw; 532. Second drive motor; 60. Support plate; 70. Tensioning jack. Detailed Implementation

[0034] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0035] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0036] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0037] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" or "several" means two or more, unless otherwise explicitly specified.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0039] Please refer to the following: Figures 1 to 4 The following describes the jack hanger for tensioning precast beams provided in the embodiments of this application.

[0040] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 This application provides a jack hanger for tensioning precast beams, including a support frame 10, a mounting plate 20, a first lifting mechanism 30, a second lifting mechanism 40, and a support plate 60. The support frame 10 includes uprights 11, crossbars 12, and intermediate bars 13. Multiple uprights 11 are arranged in a rectangular array, and crossbars 12 are horizontally connected between the ends of corresponding two uprights 11. The multiple crossbars 12 and the multiple uprights 11 together form a rectangular frame structure. Intermediate bars 13 are horizontally connected between the middle sections of corresponding two uprights 11. Intermediate bars 13 are arranged in pairs, with two intermediate bars 13 in the same pair positioned opposite each other on both sides of the support frame 10. A mounting plate 20 is slidably fitted onto the uprights 11. A first lifting mechanism 30 is located on the support frame 10 and is used to drive the mounting plate 20 to move vertically along the uprights 11. A second lifting mechanism 40 is located at the bottom of the mounting plate 20, and a tension jack 70 is connected to the lifting end of the second lifting mechanism 40. A support plate 60 is detachably mounted above the intermediate bars 13.

[0041] Compared with the prior art, the beneficial effects of the jack hanger for precast beam tensioning provided in this application embodiment are:

[0042] The precast beam tensioning jack hanger provided in this embodiment includes a support frame 10, a mounting plate 20, a first lifting mechanism 30, a second lifting mechanism 40, and a support plate 60. The support frame 10 includes a vertical rod 11, a horizontal rod 12, and a central rod 13. The first lifting mechanism 30 drives the mounting plate 20 to move up and down, and the second lifting mechanism 40 drives the tensioning jack 70 to rise and fall. When tensioning the precast beam, the first lifting mechanism 30 adjusts the mounting plate 20 to the top of the support frame 10 to tension the steel strands on the precast beam. When not in use, the first lifting mechanism 30 adjusts the mounting plate 20 to the bottom of the support frame 10, and the support plate 60 is placed above the central rod 13. The upper surfaces of the mounting plate 20 and the support plate 60 respectively form storage spaces, allowing the hanger to function as a storage rack, combining lifting and storage functions, thus saving laboratory space.

[0043] The support frame 10 is a square frame structure formed by combining uprights 11 and crossbars 12. The uprights 11 and crossbars 12 can be common steel materials such as seamless steel pipes and square steel. The uprights 11 and crossbars 12 can be connected as a whole by welding, screw connection, plug-in connection, etc., and can be a detachable connection or a non-detachable connection.

[0044] The intermediate rod 13 can be a round or square rod. The intermediate rods 13 are in pairs and are used to support the support plate 60. The two intermediate rods 13 in the same pair should be on the same horizontal plane.

[0045] A second lifting mechanism 40 is installed on the mounting plate 20. The second lifting mechanism 40 is used to lift the tensioning jack 70 to the same height as the steel strand. The second lifting mechanism 40 is an electric hoist or a manual hoist.

[0046] The first lifting mechanism 30 can drive the mounting plate 20 to move up and down, so that the mounting plate 20 is in... Figure 1 and Figure 4 The device moves between the two positions shown. When tensioning is required, the support plate 60 is removed, and the first lifting mechanism 30 is controlled to drive the mounting plate 20 to the top of the support frame 10. When tensioning is not required, the first lifting mechanism 30 is controlled to drive the mounting plate 20 to the bottom of the support frame 10, and the support plate 60 is placed on the intermediate rod 13. The support frame 10 can be used as a storage rack, and laboratory equipment and other items can be placed on the support plate 60 and the mounting plate 20, saving indoor space.

[0047] The first lifting mechanism 30 can take the form of a hydraulic lift, an electric lifting rod, an electric hoist, etc. The pallet 60 is detachably installed above the intermediate rod 13. The pallet 60 is used to support items and can be made of common sheet materials such as metal, wood, and plastic.

[0048] The support plate 60 and the intermediate rod 13 can be connected in a detachable manner by means of bolts, snap-fit, etc.

[0049] To facilitate the adjustment of the position of the support frame 10, a movable wheel 14 can be installed at the bottom of the upright 11. At least three movable wheels 14 are provided, and at least one of the movable wheels 14 is equipped with a brake unit. When the support frame 10 moves to the designated position, the movable wheel 14 can be locked by the brake unit.

[0050] The mobile wheel 14 can be any existing wheel product on the market, without any restrictions on its specific specifications or models.

[0051] Please see Figure 1 , Figure 2 and Figure 4 In some possible embodiments, the first lifting mechanism 30 includes a winch 31, which is located on the top of the support frame 10. A rope 311 is wound on the winding shaft of the winch 31, and the free end of the rope 311 is connected to the mounting plate 20. The winch 31 is used to wind or release the rope 311 to drive the mounting plate 20 to rise or fall.

[0052] To facilitate the connection of rope 311, a lifting ring 22 is provided on the upper surface of the mounting plate 20. The lifting ring 22 can be fixed to the mounting plate 20 by welding, bolting, or other methods.

[0053] Please see Figure 1 and Figure 2In some possible embodiments, there are two winches 31 arranged opposite to the support frame 10. The ropes 311 of the two winches 31 are respectively connected to the two ends of the mounting plate 20 to balance the force on the mounting plate 20. A drive shaft 32 is coaxially connected between the winding shafts of the two winches 31. The drive shaft 32 is driven by a first drive motor 33. Using a first drive motor 33 to drive the two winches 31 at the same time saves costs and ensures that the two winches 31 move synchronously.

[0054] The motor shaft of the first drive motor 33 and the transmission shaft 32 can transmit power through common transmission methods such as gear transmission, chain transmission, and belt transmission. The transmission shaft 32 is fixedly connected to the winding shaft of the winch 31 by means of key connection, welding, etc.

[0055] Please see Figure 2 and Figure 4 In some possible embodiments, the four corners of the mounting plate 20 are respectively provided with sliding sleeves 21. The sliding sleeves 21 have guide holes that slide with the uprights 11. In order to avoid interference between the sliding sleeves 21 and the intermediate rods 13 when the sliding sleeves 21 move up and down along the uprights 11, the sliding sleeves 21 have clearance grooves. The clearance grooves extend vertically through the sidewalls of the sliding sleeves 21. The clearance grooves correspond vertically to the connection positions of the intermediate rods 13 and the uprights 11, so that the sliding sleeves 21 can pass smoothly through the connection positions of the intermediate rods 13 and the uprights 11.

[0056] Please see Figure 3 and Figure 4 In some possible embodiments, the jack hanger for precast beam tensioning further includes an adjustment mechanism 50, which drives the tensioning jack 70 to move along the length of the steel strand. The adjustment mechanism 50 includes a guide rail 51, a sliding block 52, and a translation drive mechanism 53. The guide rail 51 is disposed on the lower surface of the mounting plate 20 along the axial direction of the tensioning jack 70; the sliding block 52 is slidably engaged with the guide rail 51, and a second lifting mechanism 40 is disposed on the sliding block 52; the translation drive mechanism 53 drives the sliding block 52 to move along the guide rail 51.

[0057] In this embodiment, the slide rail serves as a guide. The slide rail is set parallel to the length direction of the steel strand and is fixed to the lower surface of the mounting plate 20 by welding or screw connection. The sliding block 52 can move along the slide rail. The translation drive mechanism 53 serves as a power output device, driving the sliding block 52 to move, thereby driving the second lifting mechanism 40 and the tensioning jack 70 to move along the axial direction of the steel strand.

[0058] The translation drive mechanism 53 can be an electric telescopic rod, a telescopic cylinder, or a rack and pinion driven by a motor and gears, as long as it can achieve linear reciprocating movement.

[0059] Please see Figure 3 and Figure 4The translation drive mechanism 53 includes a lead screw 531 and a second drive motor 532. The lead screw 531 is located on the lower surface of the mounting plate 20 parallel to the length direction of the guide rail 51, and the sliding block 52 has a mounting hole that is threaded into the lead screw 531; the second drive motor 532 is used to drive the lead screw 531 to rotate around its own central axis.

[0060] Please see Figure 1 and Figure 4 In some possible embodiments, for the convenience of storing the tray 60, one side of the tray 60 has a hook, the tray 60 has a horizontal posture supporting above the intermediate rod 13, and a vertical posture hanging on one of the intermediate rods 13 by the hook.

[0061] When the pallet is at 60 Figure 1 In the vertical position shown, the support plate 60 is hooked onto one of the intermediate rods 13, and the support plate 60 will not affect the lifting and lowering of the mounting plate 20 or the operation of the tensioning jack 70. When the support plate 60 is in... Figure 4 In the horizontal position shown, the tray 60 is supported between the two intermediate rods 13, and items can be placed on it.

[0062] The intermediate rod 13 is provided with two or more sets at intervals from top to bottom, and the number of support plates 60 corresponds to the number of sets of intermediate rod 13, which is two or more.

[0063] It is understood that the parts in the above embodiments can be freely combined or deleted to form different combined embodiments. The specific contents of each combined embodiment will not be repeated here. After this description, it can be considered that the present utility model specification has recorded each combined embodiment and can support different combined embodiments.

[0064] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A jack hanger for tensioning precast beams, characterized in that, include: The support frame (10) includes uprights (11), crossbars (12), and intermediate bars (13). The uprights (11) are arranged in a rectangular array in an upright posture. The crossbars (12) are connected horizontally between the ends of two corresponding uprights (11). The multiple crossbars (12) and the multiple uprights (11) together form a rectangular frame structure. The intermediate bars (13) are connected horizontally between the middle parts of two corresponding uprights (11). The intermediate bars (13) are arranged in pairs, and the two intermediate bars (13) in the same pair are arranged opposite each other on both sides of the support frame (10). Mounting plate (20) is slidably fitted to the upright (11); The first lifting mechanism (30) is provided on the support frame (10) and is used to drive the mounting plate (20) to move vertically along the upright (11); The second lifting mechanism (40) is located at the bottom of the mounting plate (20), and the lifting end of the second lifting mechanism (40) is connected to a tension jack (70). as well as The tray (60) is detachably disposed above the intermediate rod (13).

2. The jack hanger for tensioning precast beams according to claim 1, characterized in that, The bottom of the pole (11) is provided with a movable wheel (14), and at least one of the movable wheels (14) is provided with a brake unit.

3. The jack hanger for tensioning precast beams according to claim 1, characterized in that, The first lifting mechanism (30) includes a winch (31), which is located on the top of the support frame (10). A rope (311) is wound on the winding shaft of the winch (31), and the free end of the rope (311) is connected to the mounting plate (20).

4. The jack hanger for tensioning precast beams according to claim 3, characterized in that, There are two winches (31) opposite to the support frame (10). The ropes (311) of the two winches (31) are respectively connected to the two ends of the mounting plate (20). A drive shaft (32) is coaxially connected between the winding shafts of the two winches (31). The drive shaft (32) is driven by a first drive motor (33).

5. The jack hanger for tensioning precast beams according to claim 1, characterized in that, The mounting plate (20) is provided with sliding sleeves (21) at its four corners. The sliding sleeves (21) have guide holes that slide with the uprights (11). The sidewalls of the sliding sleeves (21) are provided with vertical through clearance grooves. The clearance grooves correspond to the connection positions of the intermediate rod (13) and the uprights (11).

6. The jack hanger for tensioning precast beams according to claim 1, characterized in that, The second lifting mechanism (40) is an electric hoist or a manual hoist.

7. The jack hanger for tensioning precast beams according to claim 1, characterized in that, The jack hanger for tensioning the precast beam also includes an adjustment mechanism (50), which includes: The guide rail (51) is disposed on the lower surface of the mounting plate (20) along the axial direction of the tensioning jack (70); The sliding block (52) is slidably fitted to the guide rail (51), and the second lifting mechanism (40) is disposed on the sliding block (52); and Translation drive mechanism (53) is used to drive the sliding block (52) to move along the guide rail (51).

8. The jack hanger for tensioning precast beams according to claim 7, characterized in that, The translation drive mechanism (53) includes: A lead screw (531) is disposed on the lower surface of the mounting plate (20) parallel to the length direction of the guide rail (51), and the sliding block (52) has a mounting hole that threadedly engages with the lead screw (531); and The second drive motor (532) is used to drive the lead screw (531) to rotate around its own central axis.

9. The jack hanger for tensioning precast beams according to claim 1, characterized in that, The tray (60) has a hook on one side, and the tray (60) has a horizontal posture that supports the intermediate rod (13) and a vertical posture that is hung on one of the intermediate rods (13) by the hook.

10. The jack hanger for tensioning precast beams according to claim 1 or 9, characterized in that, The intermediate rod (13) is provided in multiple sets from top to bottom, and the number of the support plates (60) is the same as the number of sets of the intermediate rod (13).

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