Box girder end form stripping device

Abstract

The utility model relates to related technical field of building construction, concretely is a box girder end mould stripping device, include: bottom plate, the top of bottom plate is fixedly connected with bottom mould, the top of bottom mould is provided with elevating box, the top of elevating box is provided with portal frame, portal frame with bottom plate fixed connection. The utility model discloses through the cooperation of bottom plate, bottom mould, elevating box, portal frame, first mould, second mould and material withdrawing mechanism, can control first mould and second mould separate with box girder simultaneously after the solidification of concrete into box girder, make the uniform stress of box girder, and then the function of box girder stripping is carried out, avoids the damage of box girder when stripping, solves the problem that the adhesion between concrete and end mould is stronger after solidifying into box girder in the existing box girder end mould stripping device, through the extension of telescopic pushing piece, the mode of pulling apart end mould and box girder and end mould, is easy to make the stress of box girder fracture.

Description

Technical Field

[0001] This utility model relates to the technical field of building construction, specifically a box girder end mold demolding device. Background Technology

[0002] The box girder formwork mainly consists of four parts: outer formwork, inner formwork, end formwork, and bottom formwork. After the concrete precast box girder has been poured for a period of time, the formwork needs to be removed and demolded, that is, the formwork is separated from the concrete surface of the box girder.

[0003] Utility model patent CN221314619U discloses a box girder end formwork demolding device, belonging to the field of building construction related technology. It addresses the problem in existing technologies where sledgehammers and pry bars are often used to separate the end formwork from the box girder during demolding. However, this method exposes the box girder to excessive external impact or compressive forces, causing large-area concrete sloughing at the end of the box girder. This necessitates extensive repairs, reducing work efficiency. The device includes a positioning sleeve, positioning shaft, jacking sleeve, and abutment plate. A telescopic jacking component includes a positioning sleeve for connecting to the outer wall of the end mold. The positioning sleeve has a positioning groove extending axially to its outer end. A positioning shaft is slidably connected inside the positioning sleeve, and a positioning block is provided on its outer peripheral wall to slide against the positioning groove. A jacking sleeve is threaded onto the outer periphery of the positioning sleeve, and can axially push the positioning block against the bottom wall of the positioning groove. An abutment plate is connected to the outer end of the positioning shaft. The telescopic jacking component is connected to the lower part of the positioning shaft via a hanging component. One end of the telescopic jacking component abuts against the bottom mold, and the other end abuts against the abutment plate. This utility model provides a box girder end mold demolding device that locks the positioning shaft onto the positioning sleeve via the jacking sleeve. The extension of the telescopic jacking component pulls the end mold apart from the box girder, achieving stable separation of the end mold and box girder and preventing damage to the box girder.

[0004] However, the above patent still has shortcomings: although the patent can separate the end mold from the box girder by extending the telescopic jacking component, the strong adhesion between the concrete and the end mold after the concrete solidifies into the box girder makes it easy for the box girder to crack at the stress point due to the method of separating the end mold from the box girder by extending the telescopic jacking component. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a box girder end mold demolding device to solve the problem mentioned in the background art that the existing box girder end mold demolding devices, due to the strong adhesion between the concrete and the end mold after the concrete has solidified into a box girder, easily cause the box girder to crack at the stress point by pulling the end mold and the box girder apart by extending the telescopic jacking member.

[0006] The technical solution of this utility model is:

[0007] A box girder end mold demolding device includes: a base plate; a bottom mold fixedly connected to the top of the base plate, a lifting box provided on the top of the bottom mold, a gantry frame provided on the top of the lifting box, the gantry frame being fixedly connected to the base plate, two first molds provided at the bottom of the lifting box, and second molds provided on both sides of the bottom of the lifting box, the first molds cooperating with the second molds; an ejection mechanism for controlling the merging and separation of the first molds and the second molds is provided inside the lifting box; and a power mechanism for controlling the lifting and lowering of the lifting box is provided on both sides of the lifting box.

[0008] Preferably, the unloading mechanism includes: a first rotating shaft rotatably connected inside the lifting box; an elliptical plate fixedly connected to the outer surface of the bottom end of the first rotating shaft; second rotating shafts fixedly connected to both sides of the bottom of the elliptical plate; a third rotating shaft provided on one side of the elliptical plate perpendicular to the second rotating shafts; the third rotating shaft fixedly connected to the elliptical plate; a first linkage rod rotatably connected to the outer surface of the second rotating shaft; a fourth rotating shaft rotatably connected to the end of the first linkage rod away from the second rotating shaft; a first moving block fixedly connected to the bottom end of each of the fourth rotating shafts; a second linkage rod rotatably connected to the outer surface of the third rotating shaft; a fifth rotating shaft rotatably connected to the end of the second linkage rod away from the third rotating shaft; a second moving block fixedly connected to the bottom end of each of the fifth rotating shafts; both the first and second moving blocks slidably connected to the lifting box; the first moving block fixedly connected to the second mold; and the second moving block fixedly connected to the first mold; a self-locking mechanism for controlling the rotation of the elliptical plate is provided at the top of the elliptical plate.

[0009] Preferably, the self-locking mechanism includes: a worm gear is provided on the top of the elliptical plate, the worm gear is fixed to the outer surface of the first rotating shaft, a worm is engaged on one side of the worm gear, and a sixth rotating shaft is fixedly connected inside the worm; one end of the sixth rotating shaft is rotatably connected to the lifting box, the other end of the sixth rotating shaft passes through the lifting box and extends to the motor, the motor is fixedly connected to the lifting box, and the sixth rotating shaft is fixedly connected to the output end of the motor.

[0010] Preferably, connecting blocks are provided on both sides of the second movable block, the connecting blocks are fixedly connected to the first mold respectively, and the connecting blocks are slidably connected to the lifting box.

[0011] Preferably, the connecting block, the first moving block, and the second moving block are provided with sliding grooves on both sides, and the lifting box is fixedly connected to the limiting slide strip near the sliding groove. The connecting block, the first moving block, and the second moving block are all slidably connected to the limiting slide strip through the sliding groove.

[0012] Preferably, the power mechanism includes: lifting blocks fixedly connected to both sides of the lifting box, screws threadedly connected to the interior of each lifting block, the bottom end of each screw rotatably connected to the base plate, and the top end of each screw penetrating the gantry frame and extending to the outside of the gantry frame; a first bevel gear fixedly connected to one end of each screw located on the outside of the gantry frame, a second bevel gear meshing on adjacent sides of the two first bevel gears, a dual-axis motor disposed between the two second bevel gears, the dual-axis motor being fixedly connected to the gantry frame, and the output ends on both sides of the dual-axis motor being fixedly connected to the second bevel gears respectively.

[0013] Preferably, one side of the bottom mold has an injection port, and a sealing gasket is fixedly connected to the top of the bottom mold.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] Firstly, this utility model, through the coordinated action of the base plate, bottom mold, lifting box, gantry frame, first mold, second mold, and unloading mechanism, can control the first mold and second mold to separate from the box girder simultaneously after the concrete has solidified into a box girder. This ensures that the box girder is subjected to uniform stress and thus performs demolding, avoiding damage to the box girder during demolding. It also solves the problem that existing box girder end mold demolding devices, due to the strong adhesion between the concrete and the end mold after the box girder has solidified, easily cause the box girder to crack at the stress points by using the extension of the telescopic jacking component to pull the end mold and the box girder apart from the end mold.

[0016] Secondly, through the coordinated action of the base plate, bottom mold, lifting box, gantry frame, first mold, second mold, unloading mechanism and power mechanism, this utility model enables the rapid merging and separation of the first mold, second mold and bottom mold, simplifying the production and demolding process of box beams and improving work efficiency. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of a box girder end mold demolding device according to the present invention;

[0018] Figure 2 This is a side sectional view of a box girder end mold demolding device according to the present invention.

[0019] Figure 3 For the present utility model Figure 2 Enlarged structural diagram at point A in the middle;

[0020] Figure 4 This is a schematic diagram of the connection structure between the first mold and the second mold of this utility model;

[0021] Figure 5This is a schematic diagram of the material ejection mechanism of this utility model;

[0022] Figure 6 This is a schematic diagram of the connection structure between the first linkage rod and the fourth rotating shaft of this utility model;

[0023] Figure 7 This is a schematic diagram of the connection structure between the first mold and the connecting block of this utility model;

[0024] Figure 8 This is a schematic diagram of the power mechanism structure of this utility model.

[0025] In the picture:

[0026] 1. Base plate; 2. Bottom mold; 3. Lifting box; 4. Gantry frame; 5. First mold; 6. Second mold; 7. Unloading mechanism; 8. Power mechanism; 9. First rotating shaft; 10. Elliptical plate; 11. Second rotating shaft; 12. Third rotating shaft; 13. First linkage rod; 14. Fourth rotating shaft; 15. First moving block; 16. Second linkage rod; 17. Fifth rotating shaft; 18. Second moving block; 19. Self-locking mechanism; 20. Worm gear; 21. Worm; 22. Sixth rotating shaft; 23. Motor; 24. Connecting block; 25. Slide groove; 26. Limiting slide bar; 27. Lifting block; 28. Screw; 29. ​​First bevel gear; 30. Second bevel gear; 31. Dual-shaft motor; 32. Filling port; 33. Sealing gasket. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figures 1 to 8 The present invention will describe the above technical solution in detail through the following embodiments:

[0029] A box girder end mold demolding device includes: a base plate 1; a bottom mold 2 fixedly connected to the top of the base plate 1, a lifting box 3 disposed on the top of the bottom mold 2, a gantry frame 4 disposed on the top of the lifting box 3, the gantry frame 4 being fixedly connected to the base plate 1, two first molds 5 disposed at the bottom of the lifting box 3, and second molds 6 disposed on both sides of the bottom of the lifting box 3, the first molds 5 and the second molds 6 cooperating with each other; an ejection mechanism 7 for controlling the merging and separation of the first molds 5 and the second molds 6 is disposed inside the lifting box 3; and a mechanism for controlling the lifting box 3 to move up and down is disposed on both sides of the lifting box 3. The lowering power mechanism 8, after the concrete solidifies into a box girder inside the first mold 5, the second mold 6 and the bottom mold 2, allows the user to control the first mold 5 and the second mold 6 to separate from the box girder simultaneously through the material ejection mechanism 7. This ensures that the box girder is subjected to uniform force during demolding, thus performing the function of demolding the box girder and avoiding damage to the box girder during demolding. It solves the problem that existing box girder end mold demolding devices, due to the strong adhesion between the concrete and the end mold after solidification, easily cause the box girder to crack at the stress points by pulling the end mold and the box girder apart through the extension of the telescopic pusher.

[0030] like Figure 5 and Figure 6As shown, the unloading mechanism 7 includes: a first rotating shaft 9 rotatably connected inside the lifting box 3; an elliptical plate 10 fixedly connected to the outer surface of the bottom end of the first rotating shaft 9; second rotating shafts 11 fixedly connected to both sides of the bottom of the elliptical plate 10; a third rotating shaft 12 disposed on one side of the elliptical plate 10 perpendicular to the second rotating shaft 11; the third rotating shaft 12 fixedly connected to the elliptical plate 10; a first linkage rod 13 rotatably connected to the outer surface of the second rotating shaft 11; a fourth rotating shaft 14 rotatably connected to the end of the first linkage rod 13 away from the second rotating shaft 11; a first moving block 15 fixedly connected to the bottom end of the fourth rotating shaft 14; a second linkage rod 16 rotatably connected to the outer surface of the third rotating shaft 12; a fifth rotating shaft 17 rotatably connected to the end of the second linkage rod 16 away from the third rotating shaft 12; a second moving block 18 fixedly connected to the bottom end of the fifth rotating shaft 17; both the first moving block 15 and the second moving block 18 are slidably connected to the lifting box 3; the first moving block 15 is fixedly connected to the second mold 6; and the second moving block 18 is fixedly connected to the first... A mold 5 is fixedly connected; the top of the elliptical plate 10 is provided with a self-locking mechanism 19 to control the rotation of the elliptical plate 10. The user controls the first rotating shaft 9 to rotate inside the lifting box 3 through the self-locking mechanism 19. While the first rotating shaft 9 rotates, it drives the elliptical plate 10. While the elliptical plate 10 rotates, it drives the second rotating shaft 11 and the third rotating shaft 12 to rotate around the first rotating shaft 9. While the second rotating shaft 11 rotates, it pushes the first linkage rod 13, so that the first linkage rod 13 pushes the first moving block 15 through the fourth rotating shaft 14. While the third rotating shaft 12 rotates, it drives one end of the second linkage rod 16, so that the second linkage rod 16 pushes the second moving block 18 through the fifth rotating shaft 17. While the first moving block 15 and the second moving block 18 slide outward inside the lifting box 3, the first moving block 15 drives the second mold 6, and the second moving block 18 drives the first mold 5, so that the first mold 5 and the second mold 6 are separated from the box beam at the same time, thus achieving the purpose of demolding.

[0031] like Figure 5 As shown, the self-locking mechanism 19 includes: a worm gear 20 is provided on the top of the elliptical plate 10, the worm gear 20 is fixed to the outer surface of the first rotating shaft 9, a worm 21 is engaged on one side of the worm gear 20, and a sixth rotating shaft 22 is fixedly connected inside the worm 21; one end of the sixth rotating shaft 22 is rotatably connected to the lifting box 3, and the other end of the sixth rotating shaft 22 passes through the lifting box 3 and extends to the motor 23, the motor 23 is fixedly connected to the lifting box 3, and the output end of the sixth rotating shaft 22 is fixedly connected to the output end of the motor 23. When the motor 23 is started, the output end of the motor 23 drives the sixth rotating shaft 22, the sixth rotating shaft 22 drives the worm 21, the worm 21 drives the worm gear 20, and the worm gear 20 rotates while driving the first rotating shaft 9, and the first rotating shaft 9 drives the elliptical plate 10 to rotate.

[0032] like Figure 7As shown, connecting blocks 24 are provided on both sides of the second moving block 18. The connecting blocks 24 are fixedly connected to the first mold 5 and slidably connected to the lifting box 3, which improves the stability of the connection between the first mold 5 and the lifting box 3.

[0033] like Figure 3 and Figure 5 As shown, sliding grooves 25 are provided on both sides of the connecting block 24, the first moving block 15, and the second moving block 18. Limiting slide bars 26 are fixedly connected to the lifting box 3 near the sliding grooves 25. The connecting block 24, the first moving block 15, and the second moving block 18 are slidably connected to the limiting slide bars 26 through the sliding grooves 25, which can limit the connecting block 24, the first moving block 15, and the second moving block 18, allowing the connecting block 24, the first moving block 15, and the second moving block 18 to slide flexibly inside the lifting box 3.

[0034] like Figure 8 As shown, the power mechanism 8 includes: lifting blocks 27 fixedly connected to both sides of the lifting box 3; screws 28 threadedly connected inside the lifting blocks 27; the bottom ends of the screws 28 rotatably connected to the base plate 1; and the top ends of the screws 28 penetrating the gantry frame 4 and extending to the outside of the gantry frame 4. A first bevel gear 29 is fixedly connected to one end of the screw 28 located on the outside of the gantry frame 4. A second bevel gear 30 meshes with each adjacent side of the two first bevel gears 29. A dual-axis motor 31 is arranged between the two second bevel gears 30. The dual-axis motor 31 is fixedly connected to the gantry frame 4, and the output ends of the dual-axis motor 31 are fixedly connected to the second bevel gears 30 on both sides. When the dual-axis motor 31 is started, its output ends drive the second bevel gears 30 to rotate. The second bevel gears 30 drive the first bevel gears 29, which in turn drive the screws 28 to rotate. Simultaneously, the rotation of the screws 28 drives the lifting blocks 27, which in turn drive the lifting box 3, thereby achieving the purpose of controlling the lifting box 3 to move up and down.

[0035] like Figure 1 As shown, a filling port 32 is provided on one side of the bottom mold 2, and a sealing gasket 33 is fixedly connected to the top of the bottom mold 2, which makes it convenient for users to fill concrete into the space between the bottom mold 2, the first mold 5 and the second mold 6 through the filling port 32. The setting of the sealing gasket 33 improves the sealing performance between the first mold 5 and the second mold 6 and the bottom mold 2.

[0036] Working principle: The user can pour concrete into the space between the first mold 5, the second mold 6, and the bottom mold 2 through the filling port 32. After the concrete solidifies into a box girder, the motor 23 is started. The output end of the motor 23 drives the sixth rotating shaft 22, which drives the worm gear 21. The worm gear 21 drives the worm wheel 20. The rotation of the worm wheel 20 drives the first rotating shaft 9, which drives the elliptical plate 10 to rotate. The rotation of the elliptical plate 10 drives the second rotating shaft 11 and the third rotating shaft 12 to rotate around the first rotating shaft 9. As the second rotating shaft 11 rotates, it pushes the first linkage rod 13, which pushes the first moving block 15 through the fourth rotating shaft 14. As the third rotating shaft 12 rotates, it drives one end of the second linkage rod 16, which pushes the second moving block 18 through the fifth rotating shaft 17. While the first moving block 15 and the second moving block 18 slide outward inside the lifting box 3, the first moving block 15 drives the second mold. 6. The second moving block 18 drives the first mold 5, causing the first mold 5 and the second mold 6 to separate from the box girder simultaneously. Then, the dual-axis motor 31 and motor 23 are started. The output end of the dual-axis motor 31 drives the second bevel gear 30 to rotate. The second bevel gear 30 drives the first bevel gear 29, and the first bevel gear 29 drives the screw 28 to rotate. The screw 28 rotates while driving the lifting block 27, and the lifting block 27 drives the lifting box 3, thereby achieving the purpose of controlling the lifting box 3 to move up and down, thus achieving the purpose of demolding. After the concrete has solidified into a box girder, the first mold and the second mold can be controlled to separate from the box girder simultaneously, so that the box girder is subjected to uniform force, thus achieving the function of demolding the box girder. This avoids damage to the box girder during demolding and solves the problem that existing box girder end mold demolding devices are prone to breakage at the stress points of the box girder because the adhesion between the concrete and the end mold is strong after the concrete has solidified into a box girder. The method of pulling the end mold and the box girder apart by the extension of the telescopic pusher is easy to cause the box girder to break.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A box girder end formwork demolding device, comprising: Base plate (1); The base plate (1) is characterized in that a bottom mold (2) is fixedly connected to the top of the base plate (1), a lifting box (3) is provided on the top of the bottom mold (2), a gantry frame (4) is provided on the top of the lifting box (3), the gantry frame (4) is fixedly connected to the base plate (1), two first molds (5) are provided at the bottom of the lifting box (3), and second molds (6) are provided on both sides of the bottom of the lifting box (3), and the first molds (5) and the second molds (6) cooperate with each other; The lifting box (3) is equipped with a material ejection mechanism (7) that controls the merging and separation of the first mold (5) and the second mold (6); Both sides of the lifting box (3) are equipped with a power mechanism (8) for controlling the lifting of the lifting box (3).

2. The box girder end mold demolding device as described in claim 1, characterized in that: The unloading mechanism (7) includes: The lifting box (3) is rotatably connected to a first rotating shaft (9). An elliptical plate (10) is fixedly connected to the outer surface of the bottom end of the first rotating shaft (9). A second rotating shaft (11) is fixedly connected to both sides of the bottom of the elliptical plate (10). A third rotating shaft (12) is provided on the side of the elliptical plate (10) perpendicular to the second rotating shaft (11). The third rotating shaft (12) is fixedly connected to the elliptical plate (10). The outer surface of the second rotating shaft (11) is rotatably connected to a first linkage rod (13). The end of the first linkage rod (13) away from the second rotating shaft (11) is rotatably connected to a fourth rotating shaft (14). The bottom end of the fourth rotating shaft (14) is fixedly connected to a first moving block (15). The outer surface of the third rotating shaft (12) is rotatably connected to a second linkage rod (16). The end of the second linkage rod (16) away from the third rotating shaft (12) is rotatably connected to a fifth rotating shaft (17). The bottom end of the fifth rotating shaft (17) is fixedly connected to a second moving block (18). The first moving block (15) and the second moving block (18) are slidably connected to the lifting box (3). The first moving block (15) is fixedly connected to the second mold (6) respectively. The second moving block (18) is fixedly connected to the first mold (5) respectively. The top of the elliptical plate (10) is provided with a self-locking mechanism (19) for controlling the rotation of the elliptical plate (10).

3. The box girder end mold demolding device as described in claim 2, characterized in that: The self-locking mechanism (19) includes: The top of the elliptical plate (10) is provided with a worm wheel (20), the worm wheel (20) is fixed to the outer surface of the first rotating shaft (9), a worm (21) is engaged on one side of the worm wheel (20), and a sixth rotating shaft (22) is fixedly connected inside the worm (21); One end of the sixth rotating shaft (22) is rotatably connected to the lifting box (3), and the other end of the sixth rotating shaft (22) passes through the lifting box (3) and extends to the motor (23). The motor (23) is fixedly connected to the lifting box (3), and the sixth rotating shaft (22) is fixedly connected to the output end of the motor (23).

4. The box girder end mold demolding device as described in claim 2, characterized in that: The second movable block (18) is provided with connecting blocks (24) on both sides. The connecting blocks (24) are fixedly connected to the first mold (5) and slidably connected to the lifting box (3).

5. The box girder end mold demolding device as described in claim 4, characterized in that: The connecting block (24), the first moving block (15) and the second moving block (18) are all provided with sliding grooves (25) on both sides. The lifting box (3) is fixedly connected with a limiting slide bar (26) near the sliding groove (25). The connecting block (24), the first moving block (15) and the second moving block (18) are all slidably connected to the limiting slide bar (26) through the sliding groove (25).

6. The box girder end mold demolding device as described in claim 1, characterized in that: The power mechanism (8) includes: Lifting blocks (27) are fixedly connected to both sides of the lifting box (3). Each lifting block (27) is threaded with a screw (28). The bottom end of each screw (28) is rotatably connected to the base plate (1). The top end of each screw (28) passes through the gantry frame (4) and extends to the outside of the gantry frame (4). The screw (28) is fixedly connected to a first bevel gear (29) at one end of the outer side of the gantry (4). The two first bevel gears (29) are meshed with a second bevel gear (30) on the adjacent side. A dual-axis motor (31) is provided between the two second bevel gears (30). The dual-axis motor (31) is fixedly connected to the gantry (4). The output ends on both sides of the dual-axis motor (31) are fixedly connected to the second bevel gears (30) respectively.

7. The box girder end mold demolding device as described in claim 1, characterized in that: The bottom mold (2) has an injection port (32) on one side, and a sealing gasket (33) is fixedly connected to the top of the bottom mold (2).

Images