A cast-in-place beam prestress tension device

Abstract

The utility model discloses a cast-in-place beam prestress tensioning device belongs to building construction technical field, including cast-in-place beam body and base, the base places the top surface of cast-in-place beam body, the both sides of base are provided with fixed establishment respectively, the top surface of base is provided with the mounting slot, and the both ends of base are provided with the expansion slot respectively, the inner chamber fixed mounting of mounting slot has double -shaft motor. In the utility model, through the cooperation of base, mounting slot, expansion slot, double -shaft motor, first screw rod, telescopic column, moving column and elevating system, utilize double -shaft motor to drive two first screw rod rotation, adjust the distance between two hydraulic jack through the thread cooperation between two first screw rod and two telescopic columns, so as to realize the prestress tensioning of cast-in-place beam body of different length, and the practicality is good.

Description

Technical Field

[0001] This utility model relates to the field of building construction technology, and more specifically, to a prestressed tensioning device for cast-in-place beams. Background Technology

[0002] Prestressing tensioning involves applying tension to a structural member in advance, causing the member to bear compressive stress and thus deform to cope with the loads on the structure itself, including the weight of the member, wind load, snow load, and seismic load. Generally, tensioning uses steel strands, jacks, anchor plates, and wedges.

[0003] A search revealed that utility model patent CN220522019U discloses a prestressed tensioning device for cast-in-place beams. The device includes a base, a tensioning mechanism at the bottom of the base, a controller fixedly connected to the center of the top of the base, lifting rings on both sides of the controller, and a terminal block on the front of the base. The tensioning mechanism includes a connecting seat slidably connected to the bottom of the base, a tensioning seat slidably connected to the bottom of the connecting seat, a hydraulic jack fixedly connected inside the tensioning seat and below the connecting seat, a fixing clamp fixedly connected to the outer wall of the hydraulic jack, and a fixing sleeve fixedly connected inside the fixing clamp. This design of a prestressed tensioning device for cast-in-place beams utilizes the tensioning mechanism within the device to prestress the cast-in-place beams, solving the problem of cumbersome, time-consuming, and labor-intensive operation when fixing prestressed steel strands in existing prestressed tensioning devices. However, the above patents still have the following shortcomings: the base length is fixed, and prestressing can only be applied to cast-in-place beams of a specific length, which is not very practical; in addition, it is not convenient to fix the base by rotating multiple bolts separately. Therefore, we have proposed a prestressing tensioning device for cast-in-place beams. Utility Model Content

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a prestressed tensioning device for cast-in-place beams.

[0005] To solve the above problems, the present invention adopts the following technical solution:

[0006] A prestressed tensioning device for cast-in-place beams includes a cast-in-place beam body and a base. The base is placed on the top surface of the cast-in-place beam body. Fixing mechanisms are respectively provided on both sides of the base. An installation groove is provided on the top surface of the base. Telescopic grooves are respectively provided at both ends of the base. A dual-axis motor is fixedly installed in the inner cavity of the installation groove. The two output shafts of the dual-axis motor extend into the inner cavities of the two telescopic grooves and are fixedly connected to first screws. Telescopic columns are threaded onto the outer sides of the two first screws. The ends of the two telescopic columns extend into the two ends of the base and are fixedly connected to movable columns. Lifting mechanisms are respectively provided on the two movable columns. Fixed sleeves are respectively provided at the bottom ends of the two lifting mechanisms. Hydraulic jacks are respectively fitted on the two fixed sleeves. The bottom surface of the movable column is flush with the bottom surface of the base.

[0007] As a preferred embodiment of this utility model, the fixing mechanism includes a lifting box fixedly connected to the side of the base. An electric push rod is fixedly installed on the top of the inner cavity of the lifting box. An installation box is fixedly connected to the output end of the electric push rod. A servo motor is fixedly installed in the inner cavity of the installation box. The output shaft of the servo motor extends to the bottom of the installation box and is fixedly connected with screws. The side of the installation box is in contact with the inner wall of the lifting box.

[0008] As a preferred embodiment of this utility model, the lifting mechanism includes a lifting box fixedly connected to the end face of the movable column. A brake motor is fixedly installed on the top surface of the lifting box. The output shaft of the brake motor extends into the inner cavity of the lifting box and is fixedly connected to a second screw. The outer side of the second screw is threaded with a lifting column. The bottom end of the lifting column is connected to the top surface of the fixed sleeve.

[0009] As a preferred embodiment of this utility model, the top surface of the base is fixedly connected with multiple lifting rings.

[0010] In a preferred embodiment of this utility model, a signal receiving controller is provided in the inner cavity of the mounting slot, and a storage battery is provided in the inner cavity of the mounting slot.

[0011] In a preferred embodiment of this utility model, the side of the telescopic column is fitted to the inner wall of the telescopic groove.

[0012] In a preferred embodiment of this utility model, the inner wall of the lifting box and the side of the lifting column are fitted together.

[0013] Compared with existing technologies, the advantages of this utility model are:

[0014] (1) In this utility model, by using the base, mounting groove, telescopic groove, dual-axis motor, first screw, telescopic column, moving column and lifting mechanism together, the dual-axis motor drives the two first screws to rotate, and the distance between the two hydraulic jacks is adjusted by the threaded engagement between the two first screws and the two telescopic columns, so as to realize the prestressing tensioning of cast-in-place beams of different lengths.

[0015] (2) In this utility model, by using the lifting box, electric push rod, mounting box, servo motor and screw together, when the base is placed on the cast-in-place beam, the servo motor drives the screw to rotate, and the electric push rod drives the mounting box and the rotating screw to move down, thereby screwing the screw into the cast-in-place beam and fixing the base on the cast-in-place beam, avoiding manual fixing of the base, and has good practicality. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the structure of the base of this utility model;

[0018] Figure 3 This is a cross-sectional view of the base of this utility model;

[0019] Figure 4 This is a cross-sectional schematic diagram of the fixing mechanism of this utility model.

[0020] Explanation of the labels in the diagram:

[0021] 1. Cast-in-place beam; 2. Base; 3. Fixing mechanism; 4. Mounting slot; 5. Telescopic slot; 6. Dual-axis motor; 7. First screw; 8. Telescopic column; 9. Moving column; 10. Lifting mechanism; 11. Fixing sleeve; 12. Hydraulic jack; 13. Lifting box; 14. Electric push rod; 15. Mounting box; 16. Servo motor; 17. Screw; 18. Lifting box; 19. Brake motor; 20. Second screw; 21. Lifting column; 22. Signal receiver controller; 23. Battery; 24. Lifting ring. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0023] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] Example:

[0026] Please see Figure 1-4 A prestressed tensioning device for cast-in-place beams includes a cast-in-place beam body 1 and a base 2. The base 2 is placed on the top surface of the cast-in-place beam body 1. Fixing mechanisms 3 are respectively provided on both sides of the base 2. An installation groove 4 is provided on the top surface of the base 2. Telescopic grooves 5 are respectively provided at both ends of the base 2. A dual-axis motor 6 is fixedly installed in the inner cavity of the installation groove 4. The two output shafts of the dual-axis motor 6 extend to the inner cavities of the two telescopic grooves 5 and are fixedly connected to the first screws 7. Telescopic columns 8 are threaded on the outer sides of the two first screws 7. The ends of the two telescopic columns 8 extend to both ends of the base 2 and are fixedly connected to the moving columns 9. Lifting mechanisms 10 are respectively provided on the two moving columns 9. Fixed sleeves 11 are respectively provided at the bottom ends of the two lifting mechanisms 10. Hydraulic jacks 12 are respectively fitted on the two fixed sleeves 11. The bottom surface of the moving columns 9 is flush with the bottom surface of the base 2.

[0027] In this embodiment, the threaded engagement between the first screw 7 and the telescopic column 8 drives the two telescopic columns 8 to move away from or closer to each other, thereby adjusting the distance between the two hydraulic jacks 12. This allows for prestressing tensioning of the steel strands inside the cast-in-place beam 1 of different lengths. The hydraulic jacks 12 are existing technology, and one end of the hydraulic jacks 12 is equipped with an anchor and a clamp. An external hydraulic drive device is used to introduce hydraulic oil into the hydraulic jacks 12, so that the hydraulic jacks 12 can be used to pull the steel strands. In addition, the telescopic column 8 is provided with a threaded transmission hole that matches the first screw 7.

[0028] For details, please refer to Figure 1 and Figure 4 The fixing mechanism 3 includes a lifting box 13 fixedly connected to the side of the base 2. An electric push rod 14 is fixedly installed on the top of the inner cavity of the lifting box 13. An installation box 15 is fixedly connected to the output end of the electric push rod 14. A servo motor 16 is fixedly installed in the inner cavity of the installation box 15. The output shaft of the servo motor 16 extends to the bottom of the installation box 15 and is fixedly connected to a screw 17. The side of the installation box 15 is in contact with the inner wall of the lifting box 13.

[0029] In this embodiment, the inner wall of the lifting box 13 is used to limit the installation box 15, so as to ensure the stability of the installation box 15 in the inner cavity of the lifting box 13.

[0030] For details, please refer to Figures 1 to 3 The lifting mechanism 10 includes a lifting box 18 fixedly connected to the end face of the moving column 9. A brake motor 19 is fixedly installed on the top surface of the lifting box 18. The output shaft of the brake motor 19 extends into the inner cavity of the lifting box 18 and is fixedly connected to a second screw 20. A lifting column 21 is threaded onto the outer side of the second screw 20. The bottom end of the lifting column 21 is connected to the top surface of the fixed sleeve 11.

[0031] In this embodiment, the height of the fixed sleeve 11 and the hydraulic jack 12 is adjusted by the threaded engagement between the second screw 20 and the lifting column 21, so that the hydraulic jack 12 and the steel strands extending from the end of the cast-in-place beam 1 are arranged concentrically. In addition, the lifting column 21 is provided with a threaded transmission hole that matches the second screw 20.

[0032] For details, please refer to Figure 2 Multiple lifting rings 24 are fixedly connected to the top surface of the base 2.

[0033] In this embodiment, the device is hoisted using lifting ring 24.

[0034] For details, please refer to Figure 1 and Figure 3 The inner cavity of the mounting slot 4 is equipped with a signal receiving controller 22 and a storage battery 23.

[0035] In this embodiment, the signal receiving controller 22 receives information sent by the external remote controller and controls the dual-axis motor 6, the brake motor 19, the electric push rod 14 and the servo motor 16. The battery 23 supplies power to the signal receiving controller 22, the dual-axis motor 6, the brake motor 19, the electric push rod 14 and the servo motor 16.

[0036] For details, please refer to Figure 3 The side of the telescopic column 8 fits against the inner wall of the telescopic groove 5.

[0037] In this embodiment, the inner wall of the telescopic groove 5 is used to limit the telescopic column 8, so that the telescopic column 8 can only move along the axial direction of the first screw 7.

[0038] For details, please refer to Figure 3 The inner wall of the lifting box 18 fits against the side of the lifting column 21.

[0039] In this embodiment, the inner wall of the lifting box 18 is used to limit the lifting column 21, so that the lifting column 21 can only move along the axial direction of the second screw 20.

[0040] Working principle: In use, firstly, the base 2 is hoisted onto the cast-in-place beam 1 using the crane and lifting ring 24. Simultaneously, the dual-shaft motor 6 is started to drive the two first screws 7 to rotate. Through the threaded engagement between the two first screws 7 and the two telescopic columns 8, the two hydraulic jacks 12 are moved to the outer ends of the cast-in-place beam 1. Then, the base 2 is placed on the top surface of the cast-in-place beam 1, and the two brake motors 19 are started to drive the two second screws 20 to rotate. Through the threaded engagement between the second screws 20 and the lifting column 21, the lifting column 21, the fixed sleeve 11, and the hydraulic jacks 12 are moved downward, so that the hydraulic jacks 12 and the steel strands passing through the cast-in-place beam 1 are arranged concentrically. Then, the dual-shaft motor 6 is started to drive the two first screws 7 to reverse, through the threaded engagement between the first screws 7 and the telescopic columns 8. The threaded engagement drives two hydraulic jacks 12 to approach each other, so that the ends of the two hydraulic jacks 12 come into contact with the limiting plates of the limiting anchor clips fitted on the outer side of the steel strands at both ends of the cast-in-place beam 1. At the same time, the steel strands pass through the inner side of the hydraulic jacks 12 and through the anchors and clips at the ends of the hydraulic jacks 12. The servo motor 16 is started to drive the screw 17 to rotate. The electric push rod 14 drives the mounting box 15 and the rotating screw 17 to move down, so that the screw 17 is threaded into the cast-in-place beam 1, thereby stabilizing the base 2 on the cast-in-place beam 1. Finally, the external hydraulic drive device is used to introduce hydraulic oil into the hydraulic jacks 12 so that the hydraulic jacks 12 can pull the steel strands, thereby achieving prestress tensioning of the steel strands inside the cast-in-place beam 1.

[0041] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.

Claims

1. A prestressed tensioning device for cast-in-place beams, comprising a cast-in-place beam body (1) and a base (2), characterized in that: The base (2) is placed on the top surface of the cast-in-place beam (1). Fixing mechanisms (3) are respectively provided on both sides of the base (2). An installation groove (4) is provided on the top surface of the base (2). Telescopic grooves (5) are respectively provided at both ends of the base (2). A dual-axis motor (6) is fixedly installed in the inner cavity of the installation groove (4). The two output shafts of the dual-axis motor (6) extend to the inner cavities of the two telescopic grooves (5) and are fixedly connected to the first screws (7). (7) has a telescopic column (8) threaded on its outer side. The ends of the two telescopic columns (8) extend to both ends of the base (2) and are fixedly connected to the movable column (9). The two movable columns (9) are respectively provided with lifting mechanisms (10). The bottom ends of the two lifting mechanisms (10) are respectively provided with fixed sleeves (11). The two fixed sleeves (11) are respectively provided with hydraulic jacks (12). The bottom surface of the movable column (9) is flush with the bottom surface of the base (2).

2. The prestressed tensioning device for cast-in-place beams according to claim 1, characterized in that: The fixing mechanism (3) includes a lifting box (13) fixedly connected to the side of the base (2). An electric push rod (14) is fixedly installed on the top of the inner cavity of the lifting box (13). An installation box (15) is fixedly connected to the output end of the electric push rod (14). A servo motor (16) is fixedly installed in the inner cavity of the installation box (15). The output shaft of the servo motor (16) extends to the bottom of the installation box (15) and is fixedly connected to a screw (17). The side of the installation box (15) and the inner wall of the lifting box (13) are in contact.

3. The prestressed tensioning device for cast-in-place beams according to claim 1, characterized in that: The lifting mechanism (10) includes a lifting box (18) fixedly connected to the end face of the moving column (9). A brake motor (19) is fixedly installed on the top surface of the lifting box (18). The output shaft of the brake motor (19) extends into the inner cavity of the lifting box (18) and is fixedly connected to a second screw (20). A lifting column (21) is threaded onto the outer side of the second screw (20). The bottom end of the lifting column (21) is connected to the top surface of the fixed sleeve (11).

4. The prestressed tensioning device for cast-in-place beams according to claim 1, characterized in that: The top surface of the base (2) is fixedly connected with multiple lifting rings (24).

5. The prestressed tensioning device for cast-in-place beams according to claim 1, characterized in that: The inner cavity of the mounting slot (4) is provided with a signal receiving controller (22) and a storage battery (23).

6. The prestressed tensioning device for cast-in-place beams according to claim 1, characterized in that: The side of the telescopic column (8) is in contact with the inner wall of the telescopic groove (5).

7. A prestressed tensioning device for cast-in-place beams according to claim 3, characterized in that: The inner wall of the lifting box (18) and the side of the lifting column (21) are in contact.

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