A precast box girder core form

Abstract

The application relates to the technical field of bridge engineering and discloses a prefabricated box girder core mold which comprises a core mold body and a supporting assembly installed in the core mold body, the core mold body comprises two core mold parts spliced along the transverse direction, the core mold part comprises an upper hinged part and a lower hinged part which are hinged to each other, and the core mold part is contracted when the upper hinged part and the lower hinged part rotate towards each other, the supporting assembly comprises vertical supporting pieces and inclined supporting pieces, the vertical supporting pieces are telescoped in the core mold body and abut against the upper and lower sides of the core mold body during use, the two ends of the inclined supporting pieces are connected with the inner walls of the core mold parts respectively, so that the inclined supporting pieces and the core mold parts form a triangular structure in front of the core mold parts. The application can prolong the service life of the core mold.

Description

Technical Field

[0001] The present application relates to the technical field of bridge engineering, and in particular to a prefabricated box girder core mold. Background Art

[0002] Currently, when prefabricating bridge box girders, the outer and core molds are typically customized first. These molds fit together, and then concrete is poured between them to create the hollow box girder. Because the concrete surrounds the core mold, it exerts pressure on it, causing deformation and shortening its service life. Summary of the Invention

[0003] In order to increase the service life of the core mold, the present application provides a prefabricated box girder core mold.

[0004] This application provides a prefabricated box girder core mold, which adopts the following technical solution:

[0005] A prefabricated box girder core mold comprises a core mold body and a support assembly installed in the core mold body, wherein the core mold body comprises two core mold splits spliced ​​together in a transverse direction, and the core mold splits comprise an upper hinge portion and a lower hinge portion hinged to each other, wherein the upper hinge portion and the lower hinge portion rotate relative to each other in a direction toward each other to shrink the core mold splits;

[0006] The support assembly includes a vertical support member and an oblique support member. The vertical support member is retracted in the core mold body and abuts against the upper and lower sides of the core mold body when in use; the two ends of the oblique support member are respectively connected to the inner wall of the core mold split, so that the oblique support and the core mold split are enclosed to form a triangular structure.

[0007] By adopting the above technical solution, the relative rotation and contraction of the upper hinge part and the lower hinge part enables the core mold split to be removed from the cast box beam after the casting is completed. The vertical support members support the core mold body up and down, and the oblique support members and the core mold split form a triangular structure to support the side of the core mold body, so that the vertical support members and the oblique support members can jointly resist the pressure of concrete on the core mold, thereby improving the service life of the core mold.

[0008] Optionally, a connecting seat is provided in each of the two core mold splits, and a locking piece for locking the two connecting seats is provided between the connecting seats of the two core mold splits.

[0009] By adopting the above technical solution, the locking piece locks the connecting seat of the two core mold parts, making the two core mold parts difficult to separate when pouring concrete, thereby improving the stability of the core mold body.

[0010] Optionally, the oblique support member includes:

[0011] A plurality of diagonal brace groups are provided along the length direction of the core mold split, each of the diagonal brace groups includes a first rod and a second rod, the first rod and the second rod are hinged to each other at one end close to each other, the first rod is hinged to the upper hinge part at one end away from the second rod, and the second rod is hinged to the lower hinge part at one end away from the first rod;

[0012] A joint portion extending along the length direction of the core mold split and simultaneously connected to the diagonal support group on the same diagonal support member, the joint portion being connected to the hinge of the first rod and the second rod;

[0013] The driving member is movably connected between the core mold split and the joint part, and is telescopic to drive the joint part to move along the length direction of the core mold split, so as to drive the upper hinge part to flip toward the lower hinge part.

[0014] By adopting the above technical solution, the driving member is extended and retracted to drive the joint part to move along the length direction of the core mold split, so that the first rod and the second rod rotate relative to each other, thereby adjusting the distance between the first rod and the second rod away from one end, and then driving the upper hinge part to rotate toward the lower hinge part, so that the core mold split shrinks.

[0015] Optionally, the vertical support member includes a first support rod, a second support rod and a stop portion, the first support rod is slidably mounted on the outer wall of the second support rod, the stop portion is threadedly mounted on the outer wall of the second support rod, and the stop portion is abutted against the end of the first support rod, so that the first support rod is pressed against one of the upper hinge portion and the lower hinge portion at one end away from the second support rod, and the second support rod is pressed against the other of the upper hinge portion and the lower hinge portion at one end away from the first support rod.

[0016] By adopting the above technical solution, the first support rod is slidably sleeved on the end that makes the first support rod and the second support rod move away from each other and respectively press against the upper hinge part and the lower hinge part, and the stop part thread is moved to press against the end of the first support rod, thereby limiting the first support rod and the second support rod from moving in the direction of approaching each other, so that the vertical support member is positioned and supported in the core mold body.

[0017] Optionally, the vertical support member includes an upper support rod, a lower support rod, a support rod and a telescopic power source, the upper support rod and the lower support rod extend along the length direction of the core mold split, the lower support rod is connected to the inner bottom surface of the lower hinge part, the support rod is hinged between the upper support rod and the lower support rod, the support rod rotates to drive the upper support rod to resist or separate from the inner top surface of the upper hinge part, and multiple support rods are arranged along the length direction of the lower support rod; the telescopic power source is arranged between the upper support rod and the lower support rod, and is used to press the upper support rod against the upper hinge part.

[0018] By adopting the above technical solution, multiple support rods are distributed along the length of the lower support rod, which can improve the support effect on the upper hinge portion and the lower hinge portion. When one support rod rotates, it can drive the remaining support rods to rotate together through cooperation with the upper and lower support rods, thereby quickly achieving abutment and separation between the upper support rod and the upper hinge portion. In addition, by abutting the upper support rod with the telescopic power source, the upper support rod is pressed against the upper hinge portion, which prevents the support rod from rotating and moving the upper support rod away from the upper hinge portion when the vertical support member is in the supporting state, thereby improving the stability of the vertical support member.

[0019] Optionally, the telescopic power source is hinged to the end of the lower support rod, and the telescopic power source is provided at both ends of the lower support rod away from each other. The lower hinged part has a rotation source for driving the telescopic power source to rotate. The telescopic power source can be rotated to the outside of the core mold and against the ground, so that the telescopic power source can be telescoped to lift the core mold split.

[0020] By adopting the above technical solution, the two ends of the core mold split are lifted up at the same time through the telescopic power source at both ends of the lower support rod, so that the lower surface of the shrunk core mold split can be separated from the concrete. Therefore, when the core mold split is pulled out of the prefabricated box beam, the outer wall of the core mold split is not easily rubbed against the formed concrete to cause wear of the core mold split, thereby further improving the service life of the core mold split.

[0021] Optionally, a lifting wheel is rotatably connected to the bottom surface of one end of the lower hinged portion, and the lifting wheel is used to pull the core mold split out from the end away from the lifting wheel so that it abuts against the inner bottom surface of the box beam.

[0022] By adopting the above technical solution, when the lower hinged part is pulled out to the end with the lifting wheel and enters the box beam, it is abutted against the inner bottom surface of the box beam through the lifting wheel, and the telescopic power source close to the lifting wheel is rotated to not exceed the inner bottom surface of the box beam, so that when the core mold split is pulled out, it is lifted by relying on the lifting wheel and the telescopic power source away from the end of the lifting wheel.

[0023] Optionally, a linkage member is provided between the telescopic power source at one end of the lower support rod and the adjacent support rod, and the linkage member is used to drive the support rod to rotate when the telescopic power source rotates, and the linkage member includes:

[0024] A first gear is connected to the hinged end of the telescopic power source and rotates together with the telescopic power source;

[0025] A second gear is connected to the hinged end of the support rod and the lower support rod and rotates together with the support rod;

[0026] a base, disposed in the lower hinge portion;

[0027] A first extension seat is slidably mounted on the base along the length of the core mold body, and has first transmission teeth meshing with the first gear distributed along the length of the core mold body;

[0028] A second extension seat, one end of which slides in the first extension seat along the length direction of the core mold split, and a second transmission tooth meshing with the second gear is distributed along the length direction of the core mold split;

[0029] A linkage portion is provided at one end of the second extension seat close to the first extension seat, and the first extension seat has a linkage groove for the linkage portion to slide;

[0030] A travel portion is provided at one end of the second extension seat away from the first extension seat, and the base has a travel groove for the travel portion to slide;

[0031] Among them, when the telescopic power source rotates from toward the upper support rod to toward the ground, it drives the first extension seat and the second extension seat to move, so that the linkage part moves from the end of the linkage groove away from the second gear to the end close to the second gear, and the travel part moves from the end of the travel groove away from the first gear to the end close to the first gear, so that the upper support rod moves toward the direction close to the lower support rod.

[0032] By adopting the above technical solution, the first extension seat and the second extension seat are relatively moved, so that the first extension seat can move to a certain distance and then drive the second extension seat to move, so that the relative movement distance of the first gear and the first transmission tooth is greater than the relative movement distance of the second gear and the second transmission tooth, so that the rotation angle of the support rod is smaller than the rotation angle of the telescopic power source, and thus the upper support rod is not easily interfered with the lower support rod when moving closer to the lower support rod.

[0033] Optionally, the first extension seat has a guide portion, and the base has a guide groove for the guide portion to slide.

[0034] By adopting the above technical solution, the guide portion cooperates with the guide groove to guide the movement of the first extension seat.

[0035] Optionally, when the upper hinge part and the lower hinge part rotate relative to each other, a hinge seam is formed at the hinge of the upper hinge part and the lower hinge part, and a resistance piece is connected to the upper hinge part and extends to the outside of the core mold split through the hinge seam, and a ball is rotated at the end of the resistance piece extending out of the core mold split.

[0036] By adopting the above technical solution, the resistance piece extends to the outside of the core mold split and resists the inner wall of the box beam, which can prevent the core mold split part that has been separated from the inner wall of the box beam from resisting the inner wall of the box beam again to generate friction, thereby protecting the inner wall of the box beam and the outer wall of the core mold split. The ball bearing can reduce the friction between the resistance piece and the inner wall of the box beam, making it easier for the core mold split to move out of the box beam.

[0037] In summary, this application has the following beneficial effects:

[0038] The core mold body is supported by arranging vertical support members and oblique support members in the core mold body to resist the pressure of the concrete around the core mold body on the core mold body, so that the core mold body is not easily deformed and the service life of the core mold body is increased. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the structure of Example 1 of the present application;

[0040] Figure 2 It is a front view of the first embodiment of the present application;

[0041] Figure 3 This is a simplified diagram of the core mold when it is split and unfolded in Example 1 of the present application;

[0042] Figure 4 This is a simplified diagram of the core mold when it is folded apart in Example 1 of the present application;

[0043] Figure 5 It is a schematic diagram of the structure of the second embodiment of the present application;

[0044] Figure 6 is a schematic diagram of the vertical support structure in Example 2 of the present application;

[0045] Figure 7 yes Figure 5 Schematic diagram of the enlarged structure at A in the middle;

[0046] Figure 8 yes Figure 6 Schematic diagram of the enlarged structure at B in the middle;

[0047] Figure 9 This is a schematic diagram of the explosion structure of the linkage member in the second embodiment of the present application;

[0048] Figure 10 It is a schematic diagram of the linkage structure in Example 2 of the present application.

[0049] Explanation of the accompanying symbols: 1. core mold body; 2. support assembly; 3. core mold split; 31. upper hinge part; 311. upper horizontal section; 312. chamfered section; 313. upper inclined section; 32. lower hinge part; 321. lower inclined section; 322. lower horizontal section; 4. vertical support member; 41. first support rod; 42. second support rod; 43. stopper; 44. upper support rod; 45. lower support rod; 46. support rod; 47. telescopic power source; 471. second electric telescopic rod; 5. oblique support member; 51. oblique support group; 511. first rod; 512. second rod ;52. Joint part;53. Driving member;531. First electric telescopic rod;6. Connecting seat;7. Locking member;71. Hinge plate;8. Rotation source;9. Lifting wheel;10. First gear;11. Second gear;12. Base;13. First extension seat;14. First transmission tooth;15. Second extension seat;16. Second transmission tooth;17. Linkage part;18. Linkage groove;19. Travel part;20. Travel groove;21. Guide part;22. Guide groove;23. Hinge seam;24. Resistance member;241. Third electric telescopic rod;25. Ball bearing. DETAILED DESCRIPTION

[0050] The following is combined with Figure 1-10 This application is described in further detail.

[0051] Example 1:

[0052] The embodiment of the present application discloses a prefabricated box beam core mold. Figure 1 The prefabricated box girder core mold includes a core mold body 1 and a support assembly 2. The support assembly 2 is installed inside the core mold body 1 to support the core mold body 1 so that the core mold body 1 can resist the pressure of the surrounding external concrete.

[0053] Reference Figure 2 The core mold body 1 includes two core mold splits 3, which are spliced ​​together horizontally, and a connecting seat 6 is installed in each of the two core mold splits 3. The connecting seats 6 of the two core mold splits 3 correspond to each other, and a locking piece 7 is provided between the corresponding connecting seats 6 to lock the connecting seats 6 together, so as to connect the core mold bodies 1 so that the core mold bodies 1 form a whole. The locking piece 7 is unlocked when the mold is to be dismantled.

[0054] When in use, the core mold body 1 is in the shape of an isosceles trapezoid with a hollow interior and the distance between the two opposite sides gradually decreasing downwards. The two core mold splits 3 are both U-shaped with their openings facing each other, and the sides of the core mold splits 3 are inclined relative to the vertical plane.

[0055] Reference Figure 2 and Figure 3Each core mold split 3 includes an upper hinge part 31 and a lower hinge part 32. The upper hinge part 31 includes an upper horizontal section 311, a chamfered section 312 and an upper inclined section 313 that are connected and fixed in sequence along its own circumference. When the core mold split 3 is in use, the upper horizontal section 311 is parallel to the horizontal plane, the upper inclined section 313 is inclined downward, and the angle between the upper horizontal section 311 and the upper inclined section 313 is an acute angle, and the chamfered section 312 serves as a chamfer between the upper horizontal section 311 and the upper inclined section 313.

[0056] The lower hinged portion 32 includes a lower inclined section 321 and a lower horizontal section 322 fixed in sequence along its own circumference. When the core mold split 3 is in use, the lower horizontal section 322 is parallel to the horizontal plane, the lower inclined section 321 is inclined upward, and the angle between the lower inclined section 321 and the lower horizontal section 322 is an obtuse angle.

[0057] The upper hinge part 31 is located on the upper side of the lower hinge part 32, and the bottom end of the upper inclined section 313 of the upper hinge part 31 is hinged to the top end of the lower inclined section 321 of the lower hinge part 32, and when the core mold split 3 is in use, the inclination direction of the lower inclined section 321 is consistent with the extension direction of the upper inclined section 313, and the upper horizontal sections 311 of the two core mold splits 3 are in contact with each other on the side away from the chamfered section 312, and the lower horizontal sections 322 of the two core mold splits 3 are in contact with each other on the side away from the lower inclined section 321.

[0058] Reference Figure 3 and Figure 4 When the box beam is cast, the upper hinge part 31 is rotated toward the lower hinge part 32, so that the outer wall of the upper hinge part 31 can be separated from the inner wall of the box beam, so that the core mold part 3 can be folded and contracted, so that the core mold part 3 can be removed from the box beam. Figure 2 In order to facilitate the rotation of the hinged parts 31 on the two core mold splits 3, the two core mold splits 3 have matching wedge surfaces on the side close to each other, and the wedge surface of one core mold split 3 is inclined toward the inside of the core mold split 3 close to the other core mold split 3, so that the side of the core mold split 3 close to the other core mold split 3 can rotate inward.

[0059] Reference Figure 1 and Figure 2 , wherein the connecting seat 6 is fixedly mounted on the inner wall of the upper horizontal section 311 and the lower horizontal section 322 of each core mold segment 3, and the locking member 7 includes a hinged piece 71 hingedly connected to the connecting seat 6 of one core mold segment 3, and a slot for the hinged piece 71 to be snapped into the connecting seat 6 of the other core mold segment 3. When the hinged piece 71 is snapped into the slot, a bolt is simultaneously passed through the connecting seat 6 and the hinged piece 71 and cooperates with a nut to lock the two core mold bodies 1 to each other. When demolding, the bolt is removed from the connecting seat 6, and the hinged piece 71 is rotated away from the snapped connecting seat 6, so that the core mold segment 3 can be folded.

[0060] Reference Figure 2 The support assembly 2 includes a vertical support member 4 and an oblique support member 5. The vertical support member 4 is supported between the upper and lower inner walls of the core mold split 3, so that the core mold split 3 is not easily concave inward from top to bottom. The oblique support member 5 is obliquely supported between the upper hinge part 31 and the lower hinge part 32 of the core mold split 3, so as to form a triangular structure together with the core mold split 3, so that the side of the core mold split 3 is not easily concave inward.

[0061] Reference Figure 1 and Figure 2 The diagonal support members 5 correspond one-to-one with the core mold segments 3. Each diagonal support member 5 includes a diagonal support group 51, a joint portion 52, and a driving member 53. Multiple diagonal support groups 51 are evenly spaced along the length of the core mold segment 3. The joint portion 52 simultaneously links all the diagonal support groups 51 in the corresponding diagonal support member 5. The driving member 53 drives the joint portion 52 to move, thereby driving the diagonal support group 51 to move.

[0062] Specifically, the diagonal brace group 51 includes a first rod 511 and a second rod 512. The first rod 511 is located above the second rod 512, and one end of the first rod 511 and one end of the second rod 512 are hinged to each other. The hinge axis of the first rod 511 and the second rod 512 extends along the width direction of the core mold body 3. The end of the first rod 511 away from the second rod 512 is hinged to the inner wall of the upper horizontal section 311 through a hinge seat. The end of the second rod 512 away from the first rod 511 is hinged to the inner wall of the lower horizontal section 322 on the side close to the lower inclined section 321 through a hinge seat. The hinge axes between the first rod 511 and the hinge seat and between the second rod 512 and the hinge seat extend along the width direction of the core mold body 3. The hinge seat connected to the upper horizontal section 311 is hinged to the upper horizontal section 311 (not shown in the figure), and the hinge seat connected to the lower horizontal section 322 is hinged to the lower horizontal section 322 (not shown in the figure), and the hinge axis between the hinge seat and the upper horizontal section 311 and the lower horizontal section 322 extends along the length direction of the core mold split 3.

[0063] The joint part 52 is in the shape of a long strip extending along the length direction of the core mold split 3. The joint part 52 is connected to the hinge of the first rod 511 and the second rod 512. It can be fixed to the first rod 511, or fixed to the second rod 512, or mounted on the hinge axis at the hinge of the first rod 511 and the second rod 512, and there is a gap between the first rod 511 and the second rod 512 and the hinge axis thereof so that the first rod 511 and the second rod 512 can rotate into the core mold.

[0064] The driving member 53 is a first electric telescopic rod 531. The fixed end of the first electric telescopic rod 531 is ball-hinged within the lower inclined section 321. The telescopic end of the first electric telescopic rod 531 is ball-hinged to the joint portion 52. The hinge axis of the first electric telescopic rod 531 extends vertically. In other embodiments, the driving member 53 may also be a telescopic power element such as an oil cylinder or a pneumatic cylinder.

[0065] When the first electric telescopic rod 531 contracts, it drives the joint part 52 to move along the length of the core mold body 3, causing the first rod 511 and the second rod 512 to extend in the same direction, and the upper inclined section 313 and the lower inclined section 321 to extend in the same inclined direction. When the first electric telescopic rod 531 extends, it drives the linkage part 17 to move in the opposite direction along the length of the core mold body 3, causing the first rod 511 and the second rod 512 to rotate relative to each other, and the upper hinge part 31 to rotate toward the lower hinge part 32, so that the outer wall of the upper hinge part 31 is separated from the box beam, and the core mold body 3 is folded, thereby creating a space between the core mold body 3 and the box beam for the core mold body 3 to be pulled out.

[0066] Reference Figure 2 The vertical support member 4 in this embodiment includes a first support rod 41, a second support rod 42, and a stopper 43. The first support rod 41 is cylindrical, and the second support rod 42 is screw-shaped. The first support rod 41 is coaxially slidably sleeved on the outer wall of the second support rod 42. The stopper 43 is annular and threadedly sleeved on the outer wall of the second support rod 42. In this embodiment, there are two vertical support members 4, respectively placed at the two ends of the core mold body 1 that are separated from each other, and the upper and lower ends of the vertical support members 4 are respectively opposite to the joint between the two core mold segments 3.

[0067] When the vertical support member 4 is in use, the second support rod 42 is placed on the inner bottom wall of the core mold body 1, and the first support rod 41 is vertically moved until it abuts against the inner top surface of the core mold body 1. Then, the stopper 43 is threadedly moved until it abuts against the lower end surface of the first support rod 41, restricting the first and second support rods 41 and 42 from moving toward each other, thereby vertically supporting the core mold body 1. In another embodiment, the first support rod 41 can also abut against the inner bottom wall of the core mold body 1, and the second support rod 42 can abut against the inner top surface of the core mold body 1.

[0068] The implementation principle of a prefabricated box girder core mold in the embodiment of the present application is as follows: when the core mold body 1 is cast and used, the first electric telescopic rod 531 retracts, so that the oblique support member 5 is tilted and supported between the upper hinge part 31 and the lower hinge part 32, and then the vertical support member 4 is placed in the core mold body 1, and the vertical support member 4 is adjusted so that the upper and lower ends are respectively pressed against the upper and lower inner walls of the core mold body 1 to vertically support the core mold body 1. When the casting is completed and the mold needs to be demolded, the first electric telescopic rod 531 is extended and retracted, driving the upper hinge part 31 to rotate inward toward the lower hinge part 32, so that the core mold split 3 is folded, so that there is a demolding space between the core mold split 3 and the box girder.

[0069] Example 2:

[0070] The difference between the embodiment of the present application and the embodiment 1 lies in the difference in the vertical support member 4. Figure 5 and Figure 6 In this embodiment, the vertical support member 4 corresponds one-to-one to the core mold split 3, and in this embodiment, the vertical support member 4 includes an upper support rod 44, a lower support rod 45, a support rod 46 and a telescopic power source 47.

[0071] The upper and lower support rods 44, 45 are elongated and parallel to each other. Multiple support rods 46 are evenly spaced along the length of the lower support rod 45. These support rods 46 are parallel to each other, and their ends, which are spaced apart from each other, are hinged between the upper and lower support rods 44, 45. The telescopic power source 47 is a second electric telescopic rod 471. Each vertical support member 4 has two second electric telescopic rods 471, and their fixed ends are hinged to the ends, which are spaced apart from each other, of the lower support rod 45.

[0072] The lower support rod 45 is fixed on the inner wall of the lower horizontal section 322 of the corresponding core mold split 3, and the lower support rod 45 extends along the length extension direction of the corresponding core mold split 3, and the two ends of the lower support rod 45 that are far away from each other are close to the two ends of the core mold split 3 that are far away from each other.

[0073] Reference Figure 5 and Figure 6 When the core mold split 3 is in the supporting use state, the support rod 46 is rotated to the vertical extension state. At this time, the upper support rod 44 is pressed against the inner top surface of the upper horizontal section 311, so that the support rod 46 is supported between the upper horizontal section 311 and the lower horizontal section 322, and the second electric telescopic rod 471 is rotated to the vertical extension state, so that the end of the telescopic end of the second electric telescopic rod 471 is pressed against the lower surface of the upper support rod 44 to support the upper support rod 44 and limit the upper support rod 44 from moving toward the lower support rod 45 to limit the rotation of the support rod 46.

[0074] When the core mold split 3 needs to be demolded, the second electric telescopic rod 471 is retracted and rotated to separate from the upper support rod 44, so that the support rod 46 can rotate to one side together to drive the upper support rod 44 downward to separate from the upper horizontal section 311 toward the lower support rod 45, so that the upper hinge part 31 does not interfere with the vertical support member 4 when rotating toward the lower hinge part 32.

[0075] Furthermore, the lower hinged portion 32 includes a rotation source 8 corresponding one-to-one with the second electric telescopic rod 471. This rotation source 8 is a rotating motor installed in the lower hinged portion 32, capable of forward and reverse rotation. A hinged seat is fixed to the lower support rod 45, opposite the second electric telescopic rod 471. A hinged shaft, which is fixed to the fixed end of the second electric telescopic rod 471, is rotatably connected to the hinged seat. The output end of the rotating motor is coaxially fixed to the hinge shaft. Furthermore, a clearance cavity is provided on the lower support rod 45 and the lower horizontal section 322 to allow the second electric telescopic rod 471 to move out of the core mold segment 3 under the drive of the rotating motor.

[0076] When the rotating motors at both ends of the core mold split 3 drive the second electric telescopic rod 471 to rotate out of the core mold split 3 and extend vertically, and when the telescopic end of the second electric telescopic rod 471 is extended to the ground, the upper hinge part 31 is first driven downward by the first electric telescopic rod 531 to form a gap between the top of the core mold split 3 and the inner top wall of the box beam, and then the two second electric telescopic rods 471 are started at the same time, so that the second electric telescopic rods 471 drive the core mold split 3 to be lifted upward in the box beam, thereby driving the outer wall of the lower hinge part 32 to separate from the inner wall of the box beam, and then the entire core mold split 3 is separated from the inner wall of the box beam, so as to reduce the adhesion between the core mold split 3 and the inner wall of the box beam, making it easier to pull out the core mold split 3.

[0077] Reference Figure 5 Furthermore, end molds extend from both ends of the core mold body 1, which are spaced apart during casting. A lifting wheel 9 is rotatably connected to the lower surface of one end of the lower horizontal section 322 of the core mold segment 3. The lifting wheel 9 is positioned outside the end mold during casting. The distance between the lower surface of the lower horizontal section 322 and the lifting wheel 9 is consistent with the lifting height of the core mold segment 3, and the lifting wheel 9 is positioned between the second electric telescopic rods 471 at both ends of the core mold segment 3.

[0078] The core mold split 3 is pulled out from the end away from the lifting wheel 9. When the core mold split 3 moves, the end of the core mold split 3 close to the lifting wheel 9 first enters the box beam by the lifting wheel 9 and contacts the inner bottom wall of the box beam. When the core mold split 3 moves to the point where the second electric telescopic rod 471 of the core mold split 3 with one end of the lifting wheel 9 contacts the box beam, the second electric telescopic rod 471 of the core mold split 3 with one end of the lifting wheel 9 is rotated upward to the lowest point above the inner bottom wall of the box beam, so that the core mold split 3 can continue to move forward, and the core mold split 3 is kept separated from the inner wall of the box beam by relying on the second electric telescopic rod 471 at the pulled-out end and the lifting wheel 9 during movement.

[0079] Reference Figure 5 and Figure 7 In addition, when the upper hinge part 31 rotates toward the lower hinge part 32, the hinge joint of the upper hinge part 31 and the lower hinge part 32 forms a hinge seam 23 connecting the inner and outer sides of the core mold split 3, and a plurality of resistance members 24 are distributed at intervals along the length direction of the upper inclined section 313 on the inner wall of the upper inclined section 313. The resistance member 24 is a third electric telescopic rod 241. The fixed end of the third electric telescopic rod 241 is fixed to the inner wall of the upper inclined section 313, and the telescopic end of the second electric telescopic rod 471 is rotatably connected to the ball 25 and faces the hinge joint of the upper hinge part 31 and the lower hinge part 32.

[0080] When the upper hinge part 31 completes the rotation toward the lower hinge part 32 and the core mold split 3 is lifted up, the upper inclined section 313 tilts upward toward the inner side of the core mold split 3, and the third electric telescopic rod 241 faces the hinge joint 23, and the telescopic end of the third electric telescopic rod 241 can extend from the hinge joint 23 to the outside of the core mold split 3, and make the ball 25 abut against the inner wall of the box beam, so as to guide the core mold split 3 to be dislodged, and make it difficult for the core mold split 3 to move against the inner wall of the box beam during the dislodging process.

[0081] Reference Figure 5 and Figure 8 Furthermore, in order to guide the rotation of the support rod 46, a linkage is provided between the second electric telescopic rod 471 at one end of the lower support rod 45 away from the lifting wheel 9 and the adjacent support rod 46, so that the second electric telescopic rod 471 at one end of the core mold split 3 away from the lifting wheel 9 rotates to drive the support rod 46 to rotate.

[0082] Specifically, the linkage assembly includes a first gear 10, a second gear 11, a base 12, a first extension base 13, a second extension base 15, a linkage portion 17, and a travel portion 19. The first gear 10 is coaxially fixed to the hinge axis between the second electric telescopic rod 471 and the lower support rod 45. The base 12 is fixed to the inner wall of the lower horizontal section 322. The output end of the rotation source 8 passes through the base 12 and is coaxially fixed to the first gear 10, thereby driving the rotation of the first gear 10 and the second electric telescopic rod 471. The hinge axis between the support rod 46 and the lower support rod 45 is rotatably connected to the lower support rod 45 and fixed to the support rod 46. The second gear 11 is coaxially fixed to the hinge axis between the support rod 46 and the lower support rod 45.

[0083] Reference Figure 8 and Figure 9 The base 12 is in the shape of a square plate extending along the length of the core mold body 3. The first extension seat 13 and the second extension seat 15 slide along the length of the core mold body 3 on the side of the base 12 facing the second electric telescopic rod 471. The first extension seat 13 and the second extension seat 15 are both in the shape of long strips extending along the length of the core mold body 3 and extend along the same straight line. One end of the second extension seat 15 slides within the first extension seat 13, and a dovetail-shaped guide portion 21 is fixed to the side wall of the first extension seat 13. The base 12 is provided with a guide groove 22 for the guide portion 21 to slide along the length of the core mold body 3, thereby guiding the movement of the first extension seat 13. The travel portion 19 is in the shape of a block and is fixed to the side wall of the second extension seat 15 away from the first extension seat 13. The base 12 is provided with a travel groove 20 for the travel portion 19 to slide along the length of the core mold body 3, thereby guiding the movement of the second extension seat 15.

[0084] The first gear 10 and the second gear 11 have the same outer diameter and the same number of teeth. The first extension seat 13 has first transmission teeth 14 distributed along its length on its lower surface, and the first transmission teeth 14 mesh with the first gear 10. The second extension seat 15 is located outside the first extension seat 13 and has second transmission teeth 16 distributed along its length on its lower surface, and the second transmission teeth 16 mesh with the second gear 11.

[0085] Reference Figure 9 and Figure 10 The linkage portion 17 is fixed to the side wall of the second extension seat 15 near one end of the second extension seat 15. A linkage groove 18 is opened in the first extension seat 13 for the linkage portion 17 to slide along the length direction of the first extension seat 13. The linkage groove 18 does not pass through the opposite ends of the first extension seat 13 so that the second extension seat 15 cannot slide away from the first extension seat 13, and the linkage portion 17 is located between the first gear 10 and the second gear 11. The extension length of the linkage groove 18 is greater than the extension length of the travel groove 20.

[0086] Reference Figure 5 and Figure 9When the second electric telescopic rod 471 is in a vertical state and the telescopic end is facing the upper support rod 44, combined with Figure 10 The linkage portion 17 abuts against the end of the linkage groove 18 away from the second gear 11, and the travel portion 19 abuts against the end of the travel groove 20 away from the first gear 10. At this time, the support rod 46 is in a vertically extended state.

[0087] When the second electric telescopic rod 471 rotates 135° toward the outside of the core mold split 3, the first gear 10 rotates to drive the first extension seat 13 to move, and the first extension seat 13 moves forward to the linkage groove 18 close to the end of the second gear 11 and abuts against the linkage part 17. During this process, the second extension seat 15 does not move and the support rod 46 remains in a vertical state.

[0088] When the second electric telescopic rod 471 continues to rotate until it is in a vertical position with the telescopic end facing the ground, the first gear 10 rotates, driving the first extension seat 13 to continue moving forward. The first extension seat 13, through its contact with the linkage portion 17, drives the second extension seat 15 forward together, causing the travel portion 19 to move to abut the end of the travel groove 20 near the first gear 10. This causes the second gear 11 to rotate 45° under the action of the meshing action with the second transmission tooth 16, driving the upper support rod 44 to move toward the lower support rod 45. Similarly, when the second electric telescopic rod 471 rotates 180° from facing the ground and returns to the core mold body 3, the support rod 46 returns to its vertical position.

[0089] In addition, in order to facilitate dragging of the core mold split 3, the end of the telescopic end of the second electric telescopic rod 471 is rotatably connected to a roller.

[0090] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A prefabricated box girder core mold, characterized by: The invention comprises a core mold body (1) and a support assembly (2) installed in the core mold body (1), wherein the core mold body (1) comprises two core mold splits (3) joined together in a transverse direction, and the core mold splits (3) comprise an upper hinge portion (31) and a lower hinge portion (32) hinged to each other, and when the upper hinge portion (31) and the lower hinge portion (32) rotate relative to each other in a direction of approaching each other, the core mold splits (3) are contracted; The support assembly (2) includes a vertical support member (4) and an oblique support member (5), wherein the vertical support member (4) is retracted in the core mold body (1) and abuts against the upper and lower sides of the core mold body (1) when in use; the two ends of the oblique support member (5) are respectively connected to the inner wall of the core mold split (3), so that the oblique support and the core mold split (3) are enclosed to form a triangular structure; The oblique support member (5) comprises: A plurality of diagonal brace groups (51) are provided along the length direction of the core mold body (3), each diagonal brace group (51) comprising a first rod (511) and a second rod (512), wherein the first rod (511) and the second rod (512) are hinged to each other at one end close to each other, an end of the first rod (511) away from the second rod (512) is hinged to the upper hinge portion (31), and an end of the second rod (512) away from the first rod (511) is hinged to the lower hinge portion (32); A joint portion (52) extends along the length direction of the core mold split (3) and is simultaneously connected to the oblique support group (51) on the same oblique support member (5), and the joint portion (52) is connected to the hinge between the first rod (511) and the second rod (512); The driving member (53) is movably connected between the core mold body (3) and the joint part (52), and is extended and retracted to drive the joint part (52) to move along the length direction of the core mold body (3), thereby driving the upper hinge part (31) to flip toward the lower hinge part (32).

2. The prefabricated box girder core mold according to claim 1, characterized in that: A connecting seat (6) is provided in each of the two core mold split bodies (3), and a locking piece (7) for locking the two connecting seats (6) is provided between the connecting seats (6) of the two core mold split bodies (3).

3. The prefabricated box girder core mold according to claim 1, characterized in that: The vertical support member (4) comprises a first support rod (41), a second support rod (42) and a stopper (43), wherein the first support rod (41) is slidably sleeved on the outer wall of the second support rod (42), the stopper (43) is threadedly sleeved on the outer wall of the second support rod (42), and the stopper (43) abuts against the end of the first support rod (41), so that the end of the first support rod (41) away from the second support rod (42) abuts against one of the upper hinge part (31) and the lower hinge part (32), and the end of the second support rod (42) away from the first support rod (41) abuts against the other of the upper hinge part (31) and the lower hinge part (32).

4. The prefabricated box girder core mold according to claim 1, characterized in that: The vertical support member (4) includes an upper support rod (44), a lower support rod (45), a support rod (46) and a telescopic power source (47), wherein the upper support rod (44) and the lower support rod (45) extend along the length direction of the core mold split (3), the lower support rod (45) is connected to the inner bottom surface of the lower hinge part (32), the support rod (46) is hinged between the upper support rod (44) and the lower support rod (45), the support rod (46) rotates to drive the upper support rod (44) to contact or separate from the inner top surface of the upper hinge part (31), and a plurality of support rods (46) are arranged along the length direction of the lower support rod (45); the telescopic power source (47) is arranged between the upper support rod (44) and the lower support rod (45) and is used to press the upper support rod (44) against the upper hinge part (31).

5. The prefabricated box girder core mold according to claim 4, characterized in that: The telescopic power source (47) is hinged to the end of the lower support rod (45), and the telescopic power source (47) is provided at both ends of the lower support rod (45) that are away from each other. The lower hinge portion (32) has a rotation source (8) for driving the telescopic power source (47) to rotate. The telescopic power source (47) can be rotated to the outside of the core mold and abut against the ground, so that the telescopic power source (47) is telescoped to lift the core mold split (3).

6. The prefabricated box girder core mold according to claim 5, characterized in that: A lifting wheel (9) is rotatably connected to the bottom surface of one end of the lower hinged portion (32), and the lifting wheel (9) is used to pull the core mold split (3) out from the end away from the lifting wheel (9) so that it abuts against the inner bottom surface of the box beam.

7. The prefabricated box girder core mold according to claim 5, characterized in that: A linkage member is provided between the telescopic power source (47) at one end of the lower support rod (45) and the adjacent support rod (46), and the linkage member is used to drive the support rod (46) to rotate when the telescopic power source (47) rotates. The linkage member includes: A first gear (10) is connected to a hinged end of the telescopic power source (47) and rotates together with the telescopic power source (47); A second gear (11) is connected to the hinged end of the support rod (46) and the lower support rod (45) and rotates together with the support rod (46); A base (12) is disposed in the lower hinge portion (32); A first extension seat (13) is slidably mounted on the base (12) along the length direction of the core mold body (3), and first transmission teeth (14) meshing with the first gear (10) are distributed along the length direction of the core mold body (3); A second extension seat (15) has one end that slides in the first extension seat (13) along the length direction of the core mold split (3), and a second transmission tooth (16) that meshes with the second gear (11) is distributed along the length direction of the core mold split (3); A linkage portion (17) is provided at one end of the second extension seat (15) close to the first extension seat (13), and a linkage groove (18) is provided in the first extension seat (13) for the linkage portion (17) to slide. A travel portion (19) is provided at one end of the second extension seat (15) away from the first extension seat (13), and the base (12) has a travel groove (20) for the travel portion (19) to slide; When the telescopic power source (47) rotates from toward the upper support rod (44) to toward the ground, it drives the first extension seat (13) and the second extension seat (15) to move, so that the linkage portion (17) moves from the end of the linkage groove (18) away from the second gear (11) to the end close to the second gear (11), and the travel portion (19) moves from the end of the travel groove (20) away from the first gear (10) to the end close to the first gear (10), so that the upper support rod (44) moves toward the lower support rod (45).

8. The prefabricated box girder core mold according to claim 7, characterized in that: The first extension seat (13) has a guide portion (21), and the base (12) has a guide groove (22) for the guide portion (21) to slide.

9. The prefabricated box girder core mold according to claim 1, characterized in that: When the upper hinge part (31) and the lower hinge part (32) rotate relative to each other, a hinge seam (23) is formed at the hinged portion of the upper hinge part (31) and the lower hinge part (32), and a resistance member (24) is connected to the upper hinge part (31) and extends to the outside of the core mold split (3) through the hinge seam (23), and a ball (25) is rotated at the end of the resistance member (24) extending out of the core mold split (3).

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