Pre-cast segmental beam outer mold front leg non-moment adjusting device

Abstract

The utility model discloses a kind of bending moment adjusting devices of prefabricated segmental beam outer mould front support leg, it is related to building engineering technical field, including prefabricated segmental beam outer mould, including prefabricated segmental beam outer mould, prefabricated segmental beam outer mould bottom is provided with bottom plate, prefabricated segmental beam outer mould front end bottom is provided with outer mould front support leg, outer mould front support leg is hinged with push-pull rod towards the side of prefabricated segmental beam outer mould rear support leg, the other end of push-pull rod and bottom plate upper end surface are hinged, outer mould front support leg lower end is spirally connected with height adjusting assembly, height adjusting assembly bottom end is rotatably connected with horizontal adjusting assembly, the both sides of horizontal adjusting assembly are rotatably installed with limit component;The bending moment influence that the horizontal force can be reduced to adjusting device when the front support leg adjusting module of being set is adjusted, so height and horizontal position of outer mould front support leg can be easily adjusted, while the limit component of the utility model is simple to operate, can further increase the stability of device.

Description

Technical Field

[0001] This utility model relates to the field of building engineering technology, specifically to a moment-free adjustment device for the front support leg of a precast segmental beam outer formwork. Background Technology

[0002] Precast segmental beams are segmental components of a bridge structure that are prefabricated in a beam yard using industrialized prefabrication technology. They are then assembled (by adhesive bonding, wet bonding, or dry bonding) to form an integral beam. They are the core load-bearing unit of segmental bridges and a key carrier for industrialized bridge construction.

[0003] The precast segmental beam outer formwork is a key tooling element in bridge segmental precasting construction, shaping the external contour of the beam and ensuring geometric accuracy and surface quality. It is a core piece of equipment in industrialized production, its main functions including shaping and positioning the beam through its cavity structure, bearing construction loads to resist deformation, and ensuring concrete surface quality. The front support leg of the precast segmental beam outer formwork is a key load-bearing component supporting the front end of the beam. It is mainly used to stabilize the front structure of the outer formwork and control its positional accuracy. The front support leg of the precast segmental beam outer formwork can adjust the height and horizontal position of the precast segmental beam outer formwork through its own adjustment device, thereby ensuring that the flatness and alignment of the front side and end faces of the segmental beam meet design requirements. Figure 3 , Figure 4 As shown, the existing external mold front support leg adjustment device consists of a two-way stud with two two-way nuts welded to the top and bottom, and a handle welded in the middle. Rotating the handle can adjust the height of the external mold. The extension and retraction of the bottom push-pull rod can drive this device and move the external mold back and forth. After the external mold is adjusted to the correct position, the device self-locks to prevent the external mold from moving up, down, back, or forth. The problem with this method is that when the bottom push-pull rod extends and retracts, the stud in this device is subjected to a bending moment, and the stud is prone to bending. Under the bending moment, it is difficult to rotate the handle, making it difficult to adjust the external mold up and down. Furthermore, this device relies solely on the self-locking of the push-pull rod and the stud to prevent the external mold from moving.

[0004] In view of the above, this utility model proposes a moment-free adjustment device for the front support leg of the precast segmental beam outer formwork to solve the problem of laborious adjustment caused by the bending moment of the stud. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a moment-free adjustment device for the front support leg of the precast segmental beam outer formwork.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution: This utility model discloses a moment-free adjustment device for the front support leg of a precast segmental beam outer mold, comprising a precast segmental beam outer mold, a base plate at the bottom of the precast segmental beam outer mold, a front support leg at the bottom of the front end of the precast segmental beam outer mold, and an adjustment module at the lower end of the front support leg. The adjustment module includes a push-pull rod, a height adjustment component, a horizontal adjustment component, and a limiting component. One end of the push-pull rod is hinged to the base plate and the other end is hinged to the front support leg of the outer mold.

[0007] As a preferred technical solution of this utility model, the height adjustment component includes a nut fixedly installed at the bottom of the front support leg of the outer mold, a stud is threaded inside the nut, a handle is fixedly connected to the bottom end of the stud, and a ball head is fixedly connected to the bottom end of the handle.

[0008] As a preferred technical solution of this utility model, the horizontal adjustment component includes a fixed frame fixedly installed on the upper surface of the base plate and the fixed frame is located below the front support leg of the outer mold. A slider is slidably connected inside the fixed frame. A locking plate is fixedly connected to the upper surface of the slider. A ball head is rotatably installed inside the slider and rotatably connected to the locking plate.

[0009] As a preferred technical solution of this utility model, the limiting component includes a driving component, a transmission component and a locking component. The locking component includes a third bevel gear rotatably mounted on both sides of the fixed frame. The third bevel gear is internally threaded with a limiting stud. The end of the limiting stud facing the slider is fixedly connected to a limiting plate.

[0010] As a preferred technical solution of this utility model, the transmission component includes a first rotating shaft rotatably connected to both ends of the fixed frame. Both ends of the first rotating shaft are fixedly connected to a fourth bevel gear, and the fourth bevel gear closer to the third bevel gear meshes with the third bevel gear. A second rotating shaft is symmetrically arranged at a position away from the third bevel gear. The second rotating shaft is rotatably mounted in a protrusion provided on the upper end of the base plate, and both ends of the second rotating shaft are fixedly connected to a second bevel gear. The second bevel gear closer to the first rotating shaft meshes with the fourth bevel gear.

[0011] As a preferred technical solution of this utility model, the driving component includes a rotating ring rotatably mounted on one end of two second rotating shafts away from the first rotating shaft. Two first bevel gears are symmetrically mounted on the rotating ring in the radial direction. Each of the first bevel gears meshes with the second bevel gears on the end faces of the two second rotating shafts, and a hand handle is fixedly connected to the rotating shaft facing outwards from the first bevel gears.

[0012] The beneficial effects of this utility model are: 1. When the bottom push-pull rod extends and retracts to move the outer mold back and forth, the horizontal force of the push-pull rod acts directly on the bracket, thus avoiding the stud being subjected to bending moment. The stud can be easily rotated when adjusting the height later. 2. The present invention can limit the horizontal direction after adjustment by setting the limiting component at the bottom, so as to avoid the problem that the front support leg of the precast segment beam outer formwork may slide horizontally during the construction process, thus enhancing the stability of the device; 3. When limiting the front support leg of the precast segment beam outer formwork, the limiting component of this utility model only needs to rotate the hand handle in one direction to limit the front support leg of the precast segment beam outer formwork in both the front and rear directions. Even if the limiting plate on one side abuts against the front support leg of the precast segment beam outer formwork first, the limiting plate on the other side can continue to move under the drive of the rotating ring until both sides of the front support leg of the precast segment beam outer formwork are abutted. Attached Figure Description

[0013] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the overall structure of a moment-free adjustment device for the front support leg of a precast segmental beam outer formwork according to this utility model. Figure 2 This is a partially enlarged view of the position of the front support leg of the precast segmental beam outer formwork front support leg moment-free adjustment device of this utility model; Figure 3 This is a schematic diagram of the structure of the front support leg adjustment device for the outer formwork of a precast segmental beam in the prior art; Figure 4 This is a partially enlarged view of the position of the front support leg of the precast segment beam outer formwork front support leg adjustment device in the prior art; Figure 5 This is a schematic diagram of the front support leg adjustment module of the precast segmental beam outer formwork front support leg moment-free adjustment device according to this utility model. Figure 6 This is a schematic diagram of the structure of the front support leg height adjustment component of the precast segmental beam outer formwork front support leg moment-free adjustment device. Figure 7 This is a schematic diagram of the structure of the horizontal adjustment component of the front support leg of the precast segmental beam outer formwork without bending moment adjustment device. Figure 8 This is a schematic diagram of the front support leg limiting component of the precast segmental beam outer formwork front support leg moment-free adjustment device according to this utility model. Figure 9 This is a schematic diagram of the drive assembly of the limiting component of the front support leg of the precast segmental beam outer formwork without bending moment adjustment device according to the present invention.

[0014] In the diagram: 1. Precast segmental beam outer formwork; 11. Base plate; 2. Push-pull rod; 3. Front support leg of outer formwork; 4. Height adjustment assembly; 41. Handle; 42. Stud; 43. Nut; 44. Ball head; 5. Horizontal adjustment assembly; 51. Fixed frame; 52. Slider; 53. Clamping plate; 6. Limiting assembly; 61. Rotating ring; 62. Hand handle; 63. First bevel gear; 64. Second bevel gear; 65. Third bevel gear; 66. Limiting plate; 661. Limiting stud; 67. First rotating shaft; 671. Fourth bevel gear; 68. Second rotating shaft. Detailed Implementation

[0015] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0016] Example 1, as Figures 1 to 9 As shown, the present invention provides a precast segmental beam outer formwork front support leg moment-free adjustment device, which includes a precast segmental beam outer formwork 1, a base plate 11 at the bottom of the precast segmental beam outer formwork 1, a front support leg 3 at the bottom of the front end of the precast segmental beam outer formwork 1, and an adjustment module at the lower end of the front support leg 3. The adjustment module includes a push-pull rod 2, a height adjustment component 4, a horizontal adjustment component 5, and a limiting component 6. One end of the push-pull rod 2 is hinged to the base plate 11 and the other end is hinged to the front support leg 3.

[0017] Specifically, when it is necessary to adjust the position of the precast segment beam outer formwork, the adjustment is made by the adjustment module set at the bottom of the front support leg 3 of the outer formwork. The horizontal position of the precast segment beam outer formwork can be adjusted by the push-pull rod 2 and the horizontal adjustment component 5, and the height of the precast segment beam outer formwork can be adjusted by the height adjustment component 4. After the adjustment is completed, the adjustment device can be locked by the limiting component 6 to enhance stability.

[0018] Example 2, as Figure 5 and Figure 6 As shown, the present invention provides a precast segmental beam outer formwork front support leg moment-free adjustment device, which includes a height adjustment component 4. The height adjustment component 4 includes a nut 43 fixedly installed at the bottom of the outer formwork front support leg 3. The nut 43 is internally threaded with a stud 42. The bottom end of the stud 42 is fixedly connected with a handle 41. The bottom end of the handle 41 is fixedly connected with a ball head 44.

[0019] Specifically, when it is necessary to adjust the height of the front support leg of the precast segment beam outer formwork, the handle 41 is turned to drive the stud 42 to rotate. The rotation of the stud 42 drives the nut 43 to move up and down. The up and down movement of the nut 43 will drive the front support leg 3 of the outer formwork to move up and down, thereby adjusting the overall height of the front support leg of the precast segment beam outer formwork.

[0020] Example 3, as Figure 6 and Figure 7 As shown, the present invention provides a precast segmental beam outer formwork front support leg moment-free adjustment device, which includes a horizontal adjustment component 5. The horizontal adjustment component 5 includes a fixed frame 51 fixedly installed on the upper end face of the base plate 11 and the fixed frame 51 is located below the outer formwork front support leg 3. A slider 52 is slidably connected between the two positions inside the fixed frame 51. A clamping plate 53 is fixedly connected to the upper end face of the slider 52. A ball head 44 is rotatably installed inside the slider 52 and rotatably connected to the clamping plate 53.

[0021] Specifically, when it is necessary to adjust the horizontal position of the front support leg of the precast segment beam outer formwork, the telescopic end of the push-pull rod 2 drives the front support leg 3 of the outer formwork to slide in the horizontal direction. The sliding of the front support leg 3 of the outer formwork will drive the bottom slider 52 to slide inside the fixed frame 51 through the stud 42 and ball head 44, which can ensure the stability of the horizontal sliding.

[0022] Example 4, as Figure 8 and Figure 9 As shown, the present invention provides a precast segmental beam outer formwork front support leg moment-free adjustment device, which includes a limiting component 6. The limiting component 6 includes a driving component, a transmission component, and a locking component. The locking component includes a third bevel gear 65 rotatably mounted on both sides of the fixed frame 51. The third bevel gear 65 is internally threaded with a limiting stud 661. The end of the limiting stud 661 facing the slider 52 is fixedly connected to a limiting plate 66.

[0023] The transmission assembly includes a first rotating shaft 67 rotatably connected to both ends of the fixed frame 51. Both ends of the first rotating shaft 67 are fixedly connected to a fourth bevel gear 671, and the fourth bevel gear 671 close to the third bevel gear 65 meshes with the third bevel gear 65. A second rotating shaft 68 is symmetrically arranged away from the third bevel gear 65. The second rotating shaft 68 is rotatably mounted in a protrusion provided on the upper end of the base plate 11, and both ends of the second rotating shaft 68 are fixedly connected to a second bevel gear 64. The second bevel gear 64 close to the first rotating shaft 67 meshes with the fourth bevel gear 671.

[0024] The drive assembly includes a rotating ring 61 rotatably mounted on one end of two second rotating shafts 68 away from the first rotating shaft 67. Two first bevel gears 63 are symmetrically mounted on the rotating ring 61 in the radial direction. Each first bevel gear 63 meshes with a second bevel gear 64 on the end face of the two second rotating shafts 68. A hand handle 62 is fixedly connected to the rotating shaft facing outward of the first bevel gear 63.

[0025] Specifically, after adjusting the height and position of the front support leg of the precast segment beam outer formwork, the rotating ring 61 is rotated by holding the handle 62. The rotation of the rotating ring 61 drives the two first bevel gears 63 to rotate. The rotation of the first bevel gears 63 drives the two second bevel gears 64 meshing with them to rotate. The rotation of the second bevel gears 64 drives the two second rotating shafts 68 to rotate. The rotation of the second rotating shafts 68 drives the fourth bevel gear 671 and the first rotating shaft 67 through the second bevel gear 64 on the other side. The rotation of the first rotating shaft 67 drives the third bevel gear 65 to rotate through the bevel gear. The rotation of the third bevel gear 65 drives the limiting stud 661 to move toward the slider 52. The movement of the limiting stud 661 drives the limiting plate 66 to move until the limiting plate 66 moves to the position of abutting the slider 52 to limit and fix the slider 52.

[0026] Working principle: When it is necessary to adjust the horizontal position of the front support leg of the precast segment beam outer mold, the push rod 2 pushes the front support leg 3 of the outer mold to move horizontally. The front support leg 3 of the outer mold will drive the adjustment module at its bottom to move as a whole. The slider 52 will slide inside the fixed frame 51. Since the horizontal thrust of the push rod 2 at this time only acts on the front support leg 3 of the outer mold, the stud 42 will not be subjected to bending moment. Therefore, when adjusting the height of the front support leg 3 of the outer mold later, the handle 41 can be turned more easily. When it is necessary to adjust the height of the front support leg of the precast segment beam outer mold, the handle 41 is turned to drive the stud 42 to rotate. The rotation of the stud 42 will drive the nut 43 to move, thereby realizing the height adjustment of the front support leg 3 of the outer mold. At the same time, the ball head 44 at the bottom of the stud 42 can reduce some of the friction during rotation, making the rotation easier.

[0027] After the position and height of the front support leg of the precast segmental beam outer formwork are adjusted, the rotating ring 61 is rotated around the second rotating shaft 68 by holding the hand handle 62. Initially, the hand handle 62 cannot rotate on its own axis, so the first bevel gear 63 only revolves around the center, thereby driving the second bevel gears 64 on both sides to rotate synchronously. The two second bevel gears 64 synchronously drive the second rotating shaft 68 to rotate. The second rotating shaft 68 will drive the first rotating shaft 67 to rotate through the second bevel gear 64 at the other end. The rotation of the first rotating shaft 67 will drive the third bevel gear 65 to rotate. The rotation of the third bevel gear 65 will drive the limiting stud 661 to move the limiting plate 66 towards the slider 52 until it abuts against the slider 52. Since the slider 52 may not be in a fixed position after the horizontal position of the front support leg of the precast segmental beam outer formwork is adjusted, the slider 52 may not be in a fixed position. The frame 51 is positioned in the middle, so the limiting plates 66 on both sides will not simultaneously abut against the slider 52. Once one of the limiting plates 66 abuts against the slider 52, the limiting plate 66 that has already abutted against the slider 52 will not move anymore. Similarly, the transmission components on this side will not rotate. The rotating ring 61 will continue to be driven by the hand handle 62. Since the second bevel gear 64 on one side is not rotating, the hand no longer restricts the rotation of the hand handle 62. Continuing to rotate the hand handle 62 will cause the first bevel gear 63 to rotate, and at the same time, it will continue to drive the second bevel gear on the other side to continue to rotate. At this time, the rotation speed of the second bevel gear 64 on the side that has not abutted will also increase, so that the limiting plate 66 on this side can abut against the slider 52 more quickly, thereby limiting the slider 52 and ensuring the stability of the entire device.

[0028] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A moment-free adjustment device for the front support leg of a precast segmental beam outer formwork, comprising a precast segmental beam outer formwork (1), characterized in that, The bottom of the precast segmental beam outer mold (1) is provided with a base plate (11), and the front bottom of the precast segmental beam outer mold (1) is provided with an outer mold front support leg (3). The outer mold front support leg (3) is hinged to a push-pull rod (2) on the side facing the rear support leg of the precast segmental beam outer mold. The other end of the push-pull rod (2) is hinged to the upper surface of the base plate (11). The lower end of the outer mold front support leg (3) is spirally connected to a height adjustment component (4). The bottom end of the height adjustment component (4) is rotatably connected to a horizontal adjustment component (5). Limiting components (6) are rotatably installed on both sides of the horizontal adjustment component (5).

2. The precast segmental beam outer formwork front support leg moment-free adjustment device according to claim 1, characterized in that, The height adjustment component (4) includes a nut (43) fixedly installed at the bottom of the front support leg (3) of the outer mold. The nut (43) is internally threaded with a stud (42). The bottom end of the stud (42) is fixedly connected with a handle (41). The bottom end of the handle (41) is fixedly connected with a ball head (44).

3. The precast segmental beam outer formwork front support leg moment-free adjustment device according to claim 2, characterized in that, The horizontal adjustment component (5) includes a fixed frame (51) fixedly installed on the upper surface of the base plate (11) and the fixed frame (51) is located below the front support leg (3) of the outer mold. A slider (52) is slidably connected inside the fixed frame (51). A clamping plate (53) is fixedly connected to the upper surface of the slider (52). The ball head (44) is rotatably installed inside the slider (52) and rotatably connected to the clamping plate (53).

4. The precast segmental beam outer formwork front support leg moment-free adjustment device according to claim 3, characterized in that, The limiting component (6) includes a driving component, a transmission component and a locking component. The locking component includes a third bevel gear (65) rotatably mounted on both sides of the fixed frame (51). The third bevel gear (65) is internally threaded with a limiting stud (661). The end of the limiting stud (661) facing the slider (52) is fixedly connected to a limiting plate (66).

5. The precast segmental beam outer formwork front support leg moment-free adjustment device according to claim 4, characterized in that, The transmission assembly includes a first rotating shaft (67) rotatably connected to both ends of the fixed frame (51). Both ends of the first rotating shaft (67) are fixedly connected to a fourth bevel gear (671), and the fourth bevel gear (671) close to the third bevel gear (65) meshes with the third bevel gear (65). A second rotating shaft (68) is symmetrically arranged away from the third bevel gear (65). The second rotating shaft (68) is rotatably mounted in a protrusion provided on the upper end of the base plate (11), and both ends of the second rotating shaft (68) are fixedly connected to a second bevel gear (64). The second bevel gear (64) close to the first rotating shaft (67) meshes with the fourth bevel gear (671).

6. The precast segmental beam outer formwork front support leg moment-free adjustment device according to claim 5, characterized in that, The drive assembly includes a rotating ring (61) rotatably mounted on one end of two second rotating shafts (68) away from the first rotating shaft (67). The rotating ring (61) is symmetrically mounted with two first bevel gears (63) in the radial direction. Each of the first bevel gears (63) meshes with a second bevel gear (64) on the end face of the two second rotating shafts (68), and a hand handle (62) is fixedly connected to the rotating shaft with the first bevel gears (63) facing outward.

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