Assembly type movable formwork bottom die cross beam capable of being adjusted in three directions

Abstract

The invention discloses an assembly type movable formwork bottom die cross beam capable of being adjusted in three directions. The assembly type movable formwork bottom die cross beam comprises a cross beam body, a supporting adjusting mechanism and a pushing mechanism. The cross beam body comprises a first cross beam and a second cross beam which are detachably butted along the beam span direction; and the second cross beam comprises a sub-cross beam and a folding beam which are detachably butted along the beam span direction. A hinge mechanism is arranged between the sub-cross beam and the folding beam; and when the butt joint with the sub-cross beam is released, the folding beam rotates relative to the sub-cross beam in the horizontal plane through the hinging mechanism. The at least two groups of supporting and adjusting mechanisms are fixed at the top of a main beam of the movable formwork at intervals in the beam span direction so as to respectively support the bottoms of the first cross beam and the sub-cross beam; the supporting adjusting mechanism vertically stretches out and draws back. One end of the pushing mechanism is connected with the support adjusting mechanism, and the other end drives the first cross beam or the sub-cross beam to translate along the beam span direction through linear extension. According to the bottom die cross beam, by integrating the functions of horizontal shrinkage, vertical movement and in-plane folding, the traditional problem of hole passing complexity is solved, and construction benefits are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge engineering construction, in particular to an assembled movable formwork bottom formwork beam. Background Art

[0002] Mobile formwork has been widely used in the construction of cast-in-place box girders on bridge upper sections due to its significant advantages of high rigidity and strong load-bearing capacity. However, traditional bottom formwork beams still have structural design flaws.

[0003] Currently, the base formwork beams of mainstream mobile formwork frames generally utilize a two-section, monolithic structure. After the central connection is released, they split into left and right sections, which move simultaneously outward or inward to achieve horizontal mold opening and closing. The bridge's cross slope is adjusted using disc-shaped supports installed on the base formwork beams. This two-section monolithic design makes traditional base formwork beams more suitable for single-span bridge construction. However, during the formwork opening and passing process for double-span bridges and ramp bridges with small curve radii, they are prone to spatial interference with adjacent completed piers.

[0004] Secondly, the various directional adjustment systems for traditional bottom formwork beams are typically independent and lack effective coordination mechanisms. This fragmented design necessitates frequent replacement or operation of different equipment during through-hole construction, significantly increasing process transition time and creating the risk of equipment interference. This functionally fragmented design not only restricts construction progress but also increases construction costs due to redundant equipment investment.

[0005] Therefore, the above-mentioned problems brought about by the design of traditional bottom formwork beams have become the key technical bottleneck restricting the efficient construction of large-span cast-in-place box girders. Summary of the Invention

[0006] The main technical problem to be solved by the present invention is to provide an assembled movable formwork bottom formwork crossbeam to improve the efficiency of through-hole construction.

[0007] In order to solve the above technical problems, the present invention provides a three-way adjustable assembled movable mold frame bottom mold beam, including a beam body, a support adjustment mechanism and a push mechanism;

[0008] The crossbeam body comprises a first crossbeam and a second crossbeam that are detachably connected to each other along the cross-beam direction; the second crossbeam comprises a sub-crossbeam and a folding beam that are detachably connected to each other along the cross-beam direction;

[0009] A hinge mechanism is provided between the sub-crossbeam and the folding beam; when the folding beam is released from docking with the sub-crossbeam, the folding beam rotates relative to the sub-crossbeam in a horizontal plane through the hinge mechanism;

[0010] At least two groups of the support adjustment mechanisms are fixed at intervals along the beam span direction on the top of the main beam of the movable formwork to respectively support the bottom of the first crossbeam and the sub-crossbeam; the support adjustment mechanisms are retractable in the vertical direction;

[0011] One end of the pushing mechanism is connected to the support adjustment mechanism, and the other end drives the first beam or the sub-beam to translate along the beam span direction through linear expansion and contraction.

[0012] In a preferred embodiment, the sub-crossbeam includes a first sub-crossbeam and a second sub-crossbeam that are detachably connected to each other along the span direction.

[0013] In a preferred embodiment, the articulated mechanism includes a plurality of horizontally arranged first ear plates, second ear plates and vertically arranged hinge pins; the first ear plates are welded to the folding beam, and the second ear plates are welded to the sub-crossbeam; a plurality of the first ear plates and the second ear plates are provided with vertically aligned through holes; and the hinge pins are inserted into a plurality of the through holes.

[0014] In a preferred embodiment, the hinge mechanism further includes a stiffening plate; the stiffening plate vertically connects the first ear plate and / or the second ear plate.

[0015] In a preferred embodiment, the support adjustment mechanism includes a support top seat, a support screw, a support base and an adjusting nut; the support top seat is slidably connected to the bottom of the beam body along the beam span direction, and is limitedly matched with the beam body along the beam width direction; the support base is fixedly connected to the top of the main beam of the movable mold frame; the top of the support screw is fixedly connected to the bottom of the support top seat, and the bottom is inserted into the yield cavity of the support base structure; the adjusting nut is sleeved on the outer periphery of the support screw and supported on the top of the support base.

[0016] In a preferred embodiment, the pushing mechanism includes a pushing connecting seat, a pushing support, a pushing cylinder, a first hinge and a second hinge; the pushing support is connected to the side of the support adjustment mechanism; the pushing connecting seat is slidingly connected or fastened to the bottom of the beam body; one end of the pushing cylinder is hinged to the pushing support through the second hinge, and the other end is hinged to the pushing connecting seat through the first hinge.

[0017] In a preferred embodiment, a matching butt joint surface is constructed between the first cross beam and the folding beam, so as to achieve detachable butt joint by means of a plurality of first bolts and first precision-rolled threaded steel bars.

[0018] In a preferred embodiment, a matching butt joint surface is constructed between the sub-crossbeam and the folding beam, so as to achieve detachable butt joint via a plurality of second bolts and second finished rolled threaded steel bars.

[0019] In a preferred embodiment, a positioning pin is further provided between the cross beam and the folding beam for precise positioning and locking when the bottom mold cross beam is closed.

[0020] In a preferred embodiment, the crossbeam body is a steel box beam.

[0021] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0022] The bottom mold beam provided by the present invention can adjust the vertical elevation through the support adjustment mechanism 5, thereby realizing vertical movement; through the rotation connection between the folding beam 4 and the second sub-beam 32, it can realize folding in the horizontal plane, thereby being more suitable for the construction of through-holes with a small curve radius; through the two groups of the pushing mechanisms 7, the first beam 1 and the second beam 2 are pushed horizontally respectively to realize the opening and closing of the beam body. The bottom mold beam integrates horizontal contraction, vertical movement and in-plane folding into an integrated structure, successfully solving the problem of complex operation of the traditional mobile mold frame in the bottom mold beam mold opening and through-hole operation, greatly improving construction efficiency and reducing overall costs. The functional units work together to form a complete load-bearing system, which not only meets the three-dimensional freedom of movement requirements, but also significantly improves the turnover utilization rate of the bottom mold beam through standardized component design, ultimately achieving the effect of shortening the construction period and saving construction costs. The bottom mold beam adopts a fully assembled design, and each core component is modularly connected by bolts and pins, which is easy to assemble and disassemble and has high reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 Schematic elevation view of the bottom mold beam according to an embodiment of the present invention;

[0024] Figure 2 is a schematic top view of the second crossbeam when folded in-plane in an embodiment of the present invention;

[0025] Figure 3 Schematic diagram of the connection between the support adjustment mechanism and the pushing mechanism in an embodiment of the present invention;

[0026] Figure 4 Schematic diagram of the connection between the folding beam and the sub-crossbeam in an embodiment of the present invention;

[0027] Figure 5 Schematic diagram of the connection between the first crossbeam and the folding beam in an embodiment of the present invention;

[0028] Figure 6 Schematic diagram of the connection between the first sub-beam and the second sub-beam in an embodiment of the present invention.

[0029] Markings in the figure are: 1-first crossbeam, 2-second crossbeam, 3-sub-crossbeam, 31-first sub-crossbeam, 32-second sub-crossbeam, 4-folding beam, 5-hinge mechanism, 51-first ear plate, 52-second ear plate, 53-hinge pin, 54-stiffening plate, 6-support adjustment mechanism, 61-support top seat, 62-support screw rod, 63-support base, 64-adjusting nut, 7-pushing mechanism, 71-pushing connecting seat, 72-pushing support, 73-pushing pin shaft, 74-pushing cylinder, 75-support pin shaft, 8-locating pin, 91-first bolt, 92-second bolt, 93-third bolt, 101-first finished rolled threaded steel, 102-second finished rolled threaded steel, 103-third finished rolled threaded steel. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connection" can be a wall-mounted connection, a detachable connection, or an integral connection. It can be a mechanical connection or an electrical connection. It can be a direct connection or an indirect connection through an intermediate medium. It can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0033] like Figures 1 to 6As shown, an embodiment of the present invention provides a three-way adjustable assembled movable formwork bottom formwork beam, which is installed on the top of the upper flange of the movable formwork main beam. Generally speaking, the bottom formwork beam includes a beam body, a support adjustment mechanism 6 and a pushing mechanism 7. The beam body includes a first beam 1 and a second beam 2 that can be detachably connected along the beam span direction. Furthermore, the second beam 2 includes a sub-beam 3 and a folding beam 4 that can be detachably connected. A hinge mechanism 5 is provided between the sub-beam 3 and the folding beam 4 to switch between the states of connection and rotation connection. In this embodiment, in order to improve the flexibility and adaptability of construction, the sub-beam 3 also includes at least a first sub-beam 31 and a second sub-beam 32 that can be detachably connected along the beam span direction. The following is a further explanation of the structure and connection relationship of each part of the bottom formwork beam with reference to specific illustrations.

[0034] like Figure 1 、 Figures 4 to 6 As shown, a matching butt joint is constructed between the first crossbeam 1 and the folding beam 4, allowing for detachable butt jointing along the beam span direction via a plurality of first bolts 91 and a first high-quality rolled threaded steel bar 101. Similarly, within the second crossbeam 2: a matching butt joint is constructed between the second sub-crossbeam 32 and the folding beam 4, allowing for detachable butt jointing along the beam span direction via a plurality of second bolts and a second high-quality rolled threaded steel bar 102; and a matching butt joint is constructed between the first sub-crossbeam 31 and the second sub-crossbeam 32, allowing for detachable butt jointing along the beam span direction via a plurality of third bolts 93 and a third high-quality rolled threaded steel bar 103. In this embodiment, the first crossbeam 1, the first sub-crossbeam 31, the second sub-crossbeam 32, and the folding beam 4 are steel box beams. Preferably, the first crossbeam 1 and the second crossbeam 2 are of equal length.

[0035] like Figure 5 As shown, a positioning pin 8 is further provided between the first beam 1 and the second beam 2, that is, between the first beam 1 and the folding beam 4, to precisely position and lock the bottom mold beam when the mold is closed. This is a mature existing technology and will not be described in detail herein.

[0036] like Figure 4 As shown, the hinge mechanism 5 comprises at least a plurality of horizontally arranged first lug plates 51, second lug plates 52 and vertically arranged hinge pins. The first lug plates 51 are welded to the folding beam 4, and the second lug plates 52 are welded to the second sub-crossbeam 32. The first lug plates 51 and the second lug plates 52 at least partially overlap in the vertical direction, and are provided with vertically aligned through holes. The hinge pins are inserted into the through holes to realize the rotational connection between the folding beam 4 and the second sub-crossbeam 32 in the horizontal plane. In this way, Figure 2As shown, the second crossbeam 2 can be folded in-plane to facilitate smooth passage through small curve radii. Additionally, the hinge mechanism 5 includes a plurality of stiffening plates 54, which vertically connect the first lug plate 51 and / or the second lug plate 52 to provide structural rigidity. It will be appreciated that the second sub-crossbeam 32 and folding beam 4 can only rotate relative to each other when the third bolts 93 and the third fine-rolled threaded steel bar 103 are removed to unlock the tightened connection.

[0037] like Figure 1 As shown, at least two groups of the support adjustment mechanisms 6 are fixed at intervals along the beam span direction on the top of the main beam of the mobile formwork to support the bottom of the first beam 1 and the sub-beam 3 respectively. Figure 3 As shown, the support adjustment mechanism 6 comprises a support top seat 61, a support screw, a support base 63, and an adjustment nut 64. The top of the support top seat 61 is provided with a slot for sliding connection to the crossbeam body, specifically the lower flanges of the first crossbeam 1 and sub-crossbeam 3, along the beam span direction. It also engages with the crossbeam body, specifically the first crossbeam 1 and sub-crossbeam 3, along the beam width direction. The lateral direction is the width extension direction of the bottom mold crossbeam. The support base 63 is disposed below the support top seat 61, and its bottom is welded to the top of the upper flange of the main beam of the movable mold frame. The support base 63 is provided with an open-top clearance cavity, the minimum internal dimension of which is not less than the outer diameter of the support screw 62. The support screw 62 is vertically arranged, with its bottom portion inserted into the clearance cavity of the support base 63 and its top portion welded to the bottom of the support top seat 61. The surface of the support screw 62 is threaded, and the adjustment nut 64 is threadedly fitted around the outer circumference of the support screw 62. As can be seen from the figure, the adjusting nut 64 is supported on the top of the support base 63 but is not fixed thereto. When the adjusting nut 64 rotates under the action of an external force, the reversing transmission characteristics of the thread cause the adjusting nut 64 and the top of the support screw 62 to move vertically away from or toward each other. However, because the bottom of the adjusting nut 64 is rigidly supported (or pressure-limited) by the support base 63 and cannot move downward, the interaction of these forces causes the support screw 62 to rise and fall, raising or lowering the height of the beam body at this end.

[0038] like Figure 3As shown, the pushing mechanism 7 includes a pushing connection seat 71, a pushing support 72, a pushing cylinder 74, a first hinge and a second hinge. In this embodiment, the first hinge adopts a pushing pin shaft 73, and the second hinge adopts a support pin shaft 75. The pushing support is connected to the side of the support top seat 61 of the support adjustment mechanism 6. Similar to the support top seat 61, the pushing connection seat 71 is slidably connected to the beam body, specifically the lower flange of the first beam 1 and the sub-beam 3, along the beam span direction, and is limitedly matched with the beam body, specifically the first beam 1 and the sub-beam 3, along the beam width direction. The pushing connection seat 71 is also provided with a mechanism that is fastened to the lower flange of the beam body to switch between sliding connection and fastening connection through automatic control. The pushing cylinder 74 includes a support end and an output end. The support end is hinged to the push support 72 via the support pin 75, and the output end is hinged to the push connector 71 via the push pin shaft 73. The push cylinder 74 drives the push connector 71 to move in the cross-span direction through axial expansion and contraction. When the output displacement of the push cylinder 74 is at its minimum value and has a tendency to extend, the push connector 71 is tightly connected to the beam body, pushing the beam body to move in the cross-span direction under the drive of the push cylinder 74. When the output displacement of the push cylinder 74 reaches its maximum value and has a tendency to retract, the push connector 71 switches to a sliding connection with the beam body, resets under the drive of the push cylinder 74, and enters the next stage of pushing. When the first beam 1 is disconnected from the folding beam 4, the two push mechanisms 7 located at both ends of the bottom mold beam respectively drive the first beam 1 and the second beam 2 to move away from or toward each other, thereby achieving the opening or closing of the bottom mold beam.

[0039] It should be noted that, unless otherwise specified, the beam span direction mentioned above is the span direction of the bottom formwork beam, and the beam width direction is the span direction of the bottom formwork beam.

[0040] To further understand the present technical solution, the installation process of the bottom mold beam is briefly described. The installation process includes:

[0041] Step 1: Install the support and adjustment mechanism 6. The support top seat 61, support screw, support base 63, and adjustment nut 64 are fabricated in the factory. The support base 63 is welded to the top of the upper flange of the mobile formwork's main beam, and the support top seat 61 is welded to the support screw. The components of the support and adjustment mechanism 6 are then transported to the mobile formwork assembly area. On-site, a truck crane is used to hoist the components of the support and adjustment mechanism 6 to the top of the upper flange of the mobile formwork's main beam. The adjustment nut 64 is installed on the support screw and then vertically inserted into the clearance cavity of the support base 63.

[0042] Step 2: Install the beam body. The first beam 1, first sub-beam 31, second sub-beam 32, and folding beam 4 are fabricated in the factory and assembled into the beam body according to the connection relationship described above. The beam body is then transported to the mobile formwork assembly area. A truck crane is used on-site to lift the beam body onto the axis defined by the two sets of support adjustment mechanisms 6. A lifting chain is then used to pull the beam body into the slots of the support top seat 61.

[0043] Step 3: Install the jacking mechanism 7. Process the various components of the jacking mechanism 7 in the factory. Weld the jacking support 72 to the support top seat 61 in the support adjustment mechanism 6 in the factory. Transport the various components of the jacking mechanism 7 to the mobile formwork assembly area. Use a truck crane on site to lift the various components of the jacking mechanism 7 to the top of the upper flange of the main beam of the mobile formwork, install the jacking pin shaft 73 on site, and connect the jacking connection seat 71 and the jacking cylinder 74. Connect the jacking connection seat 71 to the bottom of the beam body. Install the support pin shaft 75 on site to connect the jacking cylinder 74 and the jacking support 72.

[0044] In summary, the bottom mold beam provided in the embodiment of the present invention adjusts the vertical elevation through the support adjustment mechanism 6, thereby achieving vertical movement; through the rotational connection between the folding beam 4 and the sub-beam 3, folding in the horizontal plane is achieved, thereby being more suitable for the construction of through-holes with a small curve radius; the first beam 1 and the second beam 2 are horizontally pushed by two groups of the pushing mechanisms 7 respectively, thereby achieving the opening and closing of the beam body. The bottom mold beam integrates horizontal contraction, vertical movement and in-plane folding into an integrated structure, successfully solving the problem of complex operation of the traditional mobile mold frame in the bottom mold beam mold opening and through-hole operation, greatly improving construction efficiency and reducing overall costs. The functional units work together to form a complete load-bearing system, which not only meets the three-dimensional freedom of movement requirements, but also significantly improves the turnover utilization rate of the bottom mold beam through standardized component design, ultimately achieving the effect of shortening the construction period and saving construction costs. The bottom mold beam adopts a fully assembled design, and each core component is modularly connected by bolts and pins, which is easy to assemble and disassemble and has high reliability.

[0045] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. Any technical equivalent transformation made using the contents of the present invention specification shall fall within the protection scope of the present invention.

Claims

1. A three-way adjustable assembled movable formwork bottom formwork beam, characterized by: It includes a beam body, a support adjustment mechanism and a pushing mechanism; The crossbeam body comprises a first crossbeam and a second crossbeam that are detachably connected to each other along the cross-beam direction; the second crossbeam comprises a sub-crossbeam and a folding beam that are detachably connected to each other along the cross-beam direction; A hinge mechanism is provided between the sub-crossbeam and the folding beam; when the folding beam is released from docking with the sub-crossbeam, the folding beam rotates relative to the sub-crossbeam in a horizontal plane through the hinge mechanism; At least two groups of the support adjustment mechanisms are fixed at intervals along the beam span direction on the top of the main beam of the movable formwork to respectively support the bottom of the first crossbeam and the sub-crossbeam; the support adjustment mechanisms are retractable in the vertical direction; One end of the pushing mechanism is connected to the support adjustment mechanism, and the other end drives the first beam or the sub-beam to translate along the beam span direction through linear expansion and contraction.

2. The three-way adjustable assembled movable formwork bottom formwork crossbeam according to claim 1, characterized in that: The sub-crossbeam comprises a first sub-crossbeam and a second sub-crossbeam that are detachably connected to each other along the span direction.

3. The three-way adjustable assembled movable formwork bottom formwork crossbeam according to claim 1, characterized in that: The articulated mechanism includes several horizontally arranged first ear plates, second ear plates and vertically arranged hinge pins; the first ear plates are welded to the folding beam, and the second ear plates are welded to the sub-crossbeam; several of the first ear plates and the second ear plates are provided with vertically aligned through holes; the hinge pins are inserted into several of the through holes.

4. The three-way adjustable assembled movable formwork bottom formwork crossbeam according to claim 1, characterized in that: The hinge mechanism further comprises a stiffening plate; the stiffening plate is vertically connected to the first ear plate and / or the second ear plate.

5. The three-way adjustable assembled movable formwork bottom formwork crossbeam according to claim 1, characterized in that: The support adjustment mechanism includes a support top seat, a support screw, a support base and an adjusting nut; the support top seat is slidably connected to the bottom of the beam body along the beam span direction, and is limitedly matched with the beam body along the beam width direction; the support base is fixedly connected to the top of the main beam of the movable mold frame; the top of the support screw is fixedly connected to the bottom of the support top seat, and the bottom is inserted into the yield cavity of the support base structure; the adjusting nut is sleeved on the outer periphery of the support screw and supported on the top of the support base.

6. The three-way adjustable assembled movable formwork bottom formwork crossbeam according to claim 1, characterized in that: The pushing mechanism includes a pushing connecting seat, a pushing support, a pushing cylinder, a first hinge and a second hinge; the pushing support is connected to the side of the support adjustment mechanism; the pushing connecting seat is slidably connected or fastened to the bottom of the beam body; one end of the pushing cylinder is hinged to the pushing support through the second hinge, and the other end is hinged to the pushing connecting seat through the first hinge.

7. The three-way adjustable assembled movable formwork bottom formwork crossbeam according to claim 1, characterized in that: A matching butt joint surface is constructed between the first cross beam and the folding beam so as to achieve detachable butt joint via a plurality of first bolts and first precision-rolled threaded steel bars.

8. The three-way adjustable assembled movable formwork bottom formwork crossbeam according to claim 1, characterized in that: A matching butt joint surface is constructed between the sub-crossbeam and the folding beam so as to achieve detachable butt joint via a plurality of second bolts and second finished rolled threaded steel bars.

9. The three-way adjustable assembled movable formwork bottom formwork crossbeam according to claim 1, characterized in that: A positioning pin is also provided between the first crossbeam and the folding beam for precise positioning and locking when the bottom mold crossbeam is closed.

10. A three-way adjustable assembled movable formwork bottom formwork crossbeam according to any one of claims 1 to 9, characterized in that: The crossbeam body is a steel box beam.

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