A mid-pivot support structure

Abstract

The utility model relates to a middle fulcrum support structure relates to bridge construction technical field, it includes support seat, the top of support seat is provided with the support platform for supporting main longitudinal beam, support platform is provided with polytetrafluoroethylene slide plate. The polytetrafluoroethylene slide plate has smaller friction coefficient, can satisfy the walking auxiliary requirement of main longitudinal beam. Meanwhile, compared with the existing mode of roller, the polytetrafluoroethylene slide plate has larger stress area, can better disperse the load in the vertical direction, has better deformation resistance, prolongs the service life of equipment.

Description

Technical Field

[0001] In the field of bridge construction technology, this utility model relates to a mid-point support structure. Background Technology

[0002] The cantilever casting method is a construction method for bridges that uses a movable formwork as a working platform to symmetrically cast concrete beams in segments on both sides of the piers, applying prestress segment by segment to form a continuous beam structure. This method requires first setting up the formwork on the completed No. 1 block, and then completing the concrete pouring on the formwork system. The central support structure is the main support point located in the middle of the main longitudinal beam, and also the stress equilibrium point. During the pouring operation, the central support structure needs to provide stable support for the entire structure; after pouring, when the main longitudinal beam needs to be moved, it also needs to assist in the movement of the main longitudinal beam.

[0003] Patent 202211294918.2 discloses a mid-point support structure, which includes a roller assembly in the main support and a support steel plate on the main support. During concrete pouring, the support steel plate on the main support supports the main longitudinal beam; when the main longitudinal beam moves, the support steel plate is removed, and the roller assembly assists the main longitudinal beam in its movement. The disadvantages of this method are that the roller structure lacks rigidity, and under long-term heavy loads, the roller axle is prone to deformation, leading to imbalance. Furthermore, the support steel plate requires manual disassembly and installation, which is not only time-consuming and labor-intensive but also poses safety hazards. Utility Model Content

[0004] The purpose of this utility model is to provide a central support structure, which is novel in structure, easy to operate, can better assist walking, and has better resistance to deformation.

[0005] The embodiments of this utility model are implemented as follows: A mid-point support structure includes a support base, a support platform for supporting the main longitudinal beam is provided on the top of the support base, and a polytetrafluoroethylene sliding plate is provided on the support platform.

[0006] Furthermore, in other preferred embodiments of this utility model, a receiving cavity is provided inside the support base, the top of the receiving cavity penetrates through the support platform to form an opening, and a lifting device that can drive the polytetrafluoroethylene sliding plate to rise and fall is provided inside the receiving cavity.

[0007] Furthermore, in other preferred embodiments of the present invention, the lifting device includes a push block, the top of which has a first support surface and a second support surface distributed in a stepped manner along the forward direction of the main longitudinal beam. The first support surface is higher than the second support surface, and the first support surface and the second support surface are connected by a transition slope. The bottom of the polytetrafluoroethylene sliding plate is provided with a protrusion protruding downward, and the bottom of the protrusion abuts against the top of the push block.

[0008] Furthermore, in other preferred embodiments of this utility model, a guide slope is provided on the side of the bottom of the protrusion near the first support surface, and the guide slope is parallel to the transition slope.

[0009] Furthermore, in other preferred embodiments of the present invention, the support base further includes a pair of lateral support plates arranged opposite each other. Both lateral support plates are arranged along the forward direction of the main longitudinal beam. The pair of lateral support plates are located at the bottom of the support platform to support the support platform. A pair of sliding grooves are symmetrically arranged on the pair of lateral support plates. The sliding grooves are arranged in the vertical direction. Sliding columns are arranged on both sides of the protrusion, and the sliding columns are slidably embedded in the sliding grooves.

[0010] Furthermore, in other preferred embodiments of the present invention, a first limiting ridge is provided on the side of the first support surface away from the second support surface.

[0011] Furthermore, in other preferred embodiments of the present invention, a second limiting ridge is provided on the side of the second support surface away from the first support surface.

[0012] Furthermore, in other preferred embodiments of the present invention, the support base further includes a front support plate and a rear support plate at both ends along the forward direction of the main longitudinal beam, and the push block is provided with a hinge seat on the side facing the rear support plate for hinged connection with the movable rod of the hydraulic device, and the rear support plate is provided with a through hole for the movable rod to pass through.

[0013] Furthermore, in other preferred embodiments of this utility model, the top of the support base has a pair of limiting plates arranged opposite to each other, both of the limiting plates being arranged along the forward direction of the main longitudinal beam, and both of the limiting plates having limiting wheels on their inner sides.

[0014] Furthermore, in other preferred embodiments of this utility model, each plate is provided with multiple limiting wheels, which are spaced apart along the forward direction of the main longitudinal beam.

[0015] The beneficial effects of this utility model embodiment are: This utility model embodiment provides a mid-point support structure, which includes a support base. A support platform for supporting the main longitudinal beam is provided on the top of the support base, and a polytetrafluoroethylene (PTFE) sliding plate is provided on the support platform. The PTFE sliding plate has a low coefficient of friction, which can meet the walking assistance requirements of the main longitudinal beam. At the same time, compared with existing rollers, the PTFE sliding plate has a larger force-bearing area, which can better distribute the vertical load, has better resistance to deformation, and extends the service life of the equipment. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A top view of a mid-support structure provided in an embodiment of this utility model; Figure 2 A front view of a central support structure provided in an embodiment of this utility model; Figure 3 A side view of a central support structure provided in an embodiment of this utility model; Figure 4 A cross-sectional view of a central support structure in a first state, provided as an embodiment of the present utility model; Figure 5 This is a cross-sectional view of a central support structure provided in an embodiment of the present invention in a second state.

[0018] Icons: 100-Midpoint support structure; 110-Support seat; 111-Support platform; 112-Accommodation cavity; 1121-Opening; 120-PTFE sliding plate; 121-Protrusion; 1211-Guiding ramp; 1212-Sliding column; 130-Lifting device; 131-Push block; 1311-First support surface; 1312-Second support surface; 1313-Transition ramp; 132-First limiting edge; 133-Second limiting edge; 134-Hinge seat; 140-Side support plate; 141-Slide groove; 150-Front support plate; 160-Rear support plate; 161-Through hole; 170-Limiting plate; 171-Limiting wheel. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0020] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0021] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0023] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. Example

[0024] This embodiment provides a central support structure 100, referring to... Figures 1-3 As shown, it includes a support base 110, and a support platform 111 for supporting the main longitudinal beam is provided on the top of the support base 110. The support platform 111 is provided with a polytetrafluoroethylene sliding plate 120.

[0025] The PTFE sliding plate 120 has a surface friction coefficient as low as 0.03~0.08, which can effectively reduce the friction force on the main longitudinal beam during its movement. At the same time, compared with existing rollers, the PTFE sliding plate 120 has a larger force-bearing area, which can better distribute the vertical load, has better resistance to deformation, and extends the service life of the equipment.

[0026] Furthermore, such as Figure 1 and Figure 4 As shown, the support base 110 has a receiving cavity 112 inside. The top of the receiving cavity 112 passes through the support platform 111 to form an opening 1121. A lifting device 130 is installed inside the receiving cavity 112, which can drive the polytetrafluoroethylene (PTFE) sliding plate 120 to rise and fall. Driven by the lifting device 130, when the main longitudinal beam needs to move, the PTFE sliding plate 120 can be raised so that its upper surface is higher than the support platform 111, utilizing its low coefficient of friction to assist the main longitudinal beam in moving. During pouring, the PTFE sliding plate 120 can be lowered so that its upper surface is lower than the support platform 111, allowing the support platform 111 to support the main longitudinal beam. The greater friction of the support platform 111 restricts the sliding of the main longitudinal beam, improving the stability of the support.

[0027] like Figure 4 and Figure 5As shown, the lifting device 130 includes a push block 131, the top of which has a first support surface 1311 and a second support surface 1312 distributed in a stepped manner along the forward direction of the main longitudinal beam. The first support surface 1311 is higher than the second support surface 1312, and the first support surface 1311 and the second support surface 1312 are connected by a transition slope 1313. The bottom of the polytetrafluoroethylene (PTFE) slide plate 120 has a protruding bump 121, the bottom of which abuts against the top of the push block 131. By controlling the horizontal movement of the push block 131, the PTFE slide plate 120 can be supported by either the first support surface 1311 or the second support surface 1312. When supported by the first support surface 1311, the upper surface of the PTFE slide plate 120 is higher than the support platform 111; when supported by the second support surface 1312, the upper surface of the PTFE slide plate 120 is lower than the support platform 111. This allows the PTFE slide plate 120 to be raised and lowered without affecting the vertical load-bearing capacity.

[0028] Furthermore, a guide slope 1211 is provided on the bottom of the protrusion 121 near the first support surface 1311, and the guide slope 1211 is parallel to the transition slope 1313. The guide slope 1211 allows the protrusion 121 to switch more smoothly between the first support surface 1311 and the second support surface 1312.

[0029] The support base 110 also includes a pair of lateral support plates 140 arranged opposite each other. Both lateral support plates 140 are arranged along the forward direction of the main longitudinal beam and are located at the bottom of the support platform 111 to support it. The pair of lateral support plates 140 are symmetrically provided with a pair of sliding grooves 141, which are arranged vertically. Sliding posts 1212 are provided on both sides of the protrusion 121, and the sliding posts 1212 are slidably embedded in the sliding grooves 141. Through the cooperation of the sliding posts 1212 and the sliding grooves 141, the horizontal displacement of the polytetrafluoroethylene sliding plate 120 can be restricted, allowing it to slide only vertically.

[0030] Optionally, the first support surface 1311 has a first limiting ridge 132 on the side away from the second support surface 1312. The second support surface 1312 has a second limiting ridge 133 on the side away from the first support surface 1311. The first limiting ridge 132 and the second limiting ridge 133 can limit the displacement distance of the protrusion 121 and prevent it from slipping off the edge.

[0031] Furthermore, such as Figure 4 and Figure 5As shown, the support base 110 also includes a front support plate 150 and a rear support plate 160 at both ends along the forward direction of the main longitudinal beam. The push block 131 has a hinge seat 134 on the side facing the rear support plate 160 for hinged connection with the movable rod of the hydraulic device. The rear support plate 160 has a through hole 161 for the movable rod to pass through. The movement of the push block 131 is realized by the hydraulic device, replacing manual operation and saving more time and effort.

[0032] like Figure 1 and Figure 4 As shown, the top of the support base 110 has a pair of opposing limiting plates 170, both of which are arranged along the forward direction of the main longitudinal beam. Each pair of limiting plates 170 has a limiting wheel 171 on its inner side. Each plate has multiple limiting wheels 171, which are spaced apart along the forward direction of the main longitudinal beam. The limiting wheels 171 can engage with grooves on both sides of the main longitudinal beam, thereby limiting the main longitudinal beam and preventing it from tipping over.

[0033] In summary, this utility model embodiment provides a mid-point support structure 100, which includes a support base 110. The top of the support base 110 is provided with a support platform 111 for supporting the main longitudinal beam. The support platform 111 is equipped with a polytetrafluoroethylene (PTFE) sliding plate 120. The PTFE sliding plate 120 has a low coefficient of friction, which can meet the walking assistance requirements of the main longitudinal beam. Furthermore, compared to existing roller systems, the PTFE sliding plate 120 has a larger force-bearing area, which can better distribute the vertical load, providing better resistance to deformation and extending the service life of the equipment.

[0034] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. 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 mid-pivot support structure, characterized in that, The device includes a support base, the top of which is provided with a support platform for supporting the main longitudinal beam, and the support platform is provided with a polytetrafluoroethylene (PTFE) sliding plate; the support base has an internal cavity, the top of which passes through the support platform to form an opening, and a lifting device is provided inside the cavity to drive the PTFE sliding plate to rise and fall.

2. The central support structure according to claim 1, characterized in that, The lifting device includes a push block, the top of which has a first support surface and a second support surface that are stepped along the forward direction of the main longitudinal beam. The first support surface is higher than the second support surface, and the first support surface and the second support surface are connected by a transition slope. The bottom of the polytetrafluoroethylene sliding plate has a protruding bump, and the bottom of the protrusion abuts against the top of the push block.

3. The central support structure according to claim 2, characterized in that, The bottom of the protrusion has a guide slope on the side near the first support surface, and the guide slope is parallel to the transition slope.

4. The central support structure according to claim 3, characterized in that, The support base also includes a pair of lateral support plates arranged opposite each other. Both of the lateral support plates are arranged along the forward direction of the main longitudinal beam. The pair of lateral support plates are located at the bottom of the support platform to support the support platform. The pair of lateral support plates are symmetrically provided with a pair of sliding grooves. The sliding grooves are arranged in the vertical direction. Sliding columns are provided on both sides of the protrusion. The sliding columns are slidably embedded in the sliding grooves.

5. The central support structure according to claim 4, characterized in that, The first support surface has a first limiting edge on the side away from the second support surface.

6. The central support structure according to claim 5, characterized in that, The second support surface has a second limiting edge on the side away from the first support surface.

7. The central support structure according to claim 6, characterized in that, The support base also includes a front support plate and a rear support plate at both ends along the forward direction of the main longitudinal beam. The push block is provided with a hinge seat on the side facing the rear support plate for hinged connection with the movable rod of the hydraulic device. The rear support plate is provided with a through hole for the movable rod to pass through.

8. The central support structure according to claim 7, characterized in that, The top of the support base has a pair of limiting plates arranged opposite each other. Both of the limiting plates are arranged along the forward direction of the main longitudinal beam, and both of the limiting plates have limiting wheels on their inner sides.

9. The central support structure according to claim 8, characterized in that, Each of the limiting plates is provided with a plurality of limiting wheels, which are spaced apart along the forward direction of the main longitudinal beam.

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