An adjustable high-speed bridge installation temporary support bracket

Abstract

The application discloses an adjustable high-speed bridge installation temporary support support, and relates to the technical field of bridge installation support, which comprises a rod body, a base fixedly connected to the bottom end of the rod body, a hydraulic capsule arranged in the rod body, a flow channel formed in the rod body, a one-way valve arranged in the flow channel, a bearing rod and a pressing cylinder slidably connected to the rod body, the pressing cylinder being fixedly connected to the top of the hydraulic capsule, a movable cavity formed in one side of the rod body close to the bearing rod, the flow channel being communicated with the lower side of the movable cavity, a piston part arranged at the bottom end of the bearing rod, and a sealing cavity formed in the rod body. The application sets a "hydraulic pressure + air pressure" double driving force superposition mechanism, significantly improves the compensation driving force, can still quickly respond under the condition of large gap or high damping, avoids the structural damage risk caused by compensation lag, and simultaneously, the air pressure feedback mechanism does not need external energy, completely relies on internal fluid linkage, is energy-saving and environment-friendly.

Description

Technical Field

[0001] This invention relates to the technical field of bridge installation support, and more particularly to an adjustable temporary support bracket for high-speed bridge installation. Background Technology

[0002] During the construction of high-speed bridges, especially in the stages of precast beam hoisting, steel box girder closure, or cast-in-place continuous beam construction, temporary support frames are crucial devices for ensuring structural safety and alignment accuracy. Traditional temporary supports often employ structural forms such as steel pipe columns, Bailey bridges, or sand box bearings. Their main function is to bear the construction load of the superstructure and achieve elevation control through manual adjustment. However, these support frames are generally rigid or semi-adjustable designs, making it difficult to respond in real time to changes in the ground or minor displacements of bridge components caused by temperature deformation, creep shrinkage, or installation errors. This can easily lead to localized gaps or separations between the support and the beam, resulting in uneven stress distribution, stress concentration, and even structural damage.

[0003] Currently, some improved support frames attempt to incorporate active adjustment mechanisms such as hydraulic jacks or electric actuators to achieve dynamic adjustment of the support height. While these devices possess a certain degree of self-adaptability, they typically rely on external electricity or hydraulic pump stations as power sources, resulting in complex and costly systems. Furthermore, their reliability decreases in high-altitude, field, and power outage environments, making maintenance difficult. In addition, existing technologies lack a passive intelligent response mechanism capable of automatically sensing gaps and providing immediate compensation without external energy supply. This necessitates frequent manual inspections and interventions during construction, impacting efficiency and increasing safety risks.

[0004] To address the aforementioned problems, this invention proposes a temporary support bracket for high-speed bridge installation that requires no power source and is automatically adjustable based on a fully open spring compressing hydraulic oil. Summary of the Invention

[0005] To overcome the drawback of localized gaps or voids easily occurring between the support and the beam, this invention provides an adjustable temporary support bracket for high-speed bridge installation.

[0006] An adjustable temporary support bracket for high-speed bridge installation includes a pole with a base fixed to its bottom end. A hydraulic bladder is housed within the pole, and a flow channel with a one-way valve is located within the flow channel. A load-bearing rod and a pressing cylinder are slidably connected within the pole, with the pressing cylinder fixed to the top of the hydraulic bladder. A movable cavity is located on the side of the pole near the load-bearing rod, and the flow channel communicates with the lower side of the movable cavity. A piston is located at the bottom end of the load-bearing rod. A sealing cavity is located within the pole, and a sealing plug is fixed to the side of the pole near the sealing cavity. The pressing cylinder is slidably connected to the sealing plug. An air passage communicates between the upper side of the movable cavity and the sealing plug. A first spring is fixed between the pressing cylinder and the sealing plug. A return flow assembly for hydraulic oil return is located within the pole.

[0007] Furthermore, it is particularly preferred that the check valve controls the hydraulic oil in the hydraulic bladder to flow into the flow channel in one direction.

[0008] Furthermore, it is particularly preferred that the reflux assembly includes a reflux valve body, which is fixedly connected to the rod body and communicates between the flow channel and the movable chamber. A valve stem is slidably connected inside the reflux valve body, and a second spring is located between the reflux valve body and the valve stem.

[0009] Furthermore, it is particularly preferred that a handle is fixedly attached to the valve stem.

[0010] In addition, it is particularly preferred that the rod also includes a sliding guide rail, which is fixedly connected to the pressing cylinder. The sliding guide rail is slidably connected to a limit block. A limit groove is opened on the outer wall of the rod near the limit block. The limit block slides in the limit groove. A guide groove is opened on the outer wall of the rod.

[0011] Furthermore, it is particularly preferred that when the limiting block slides along the limiting groove to align with the guide groove, the limiting block slides up and down along the guide groove.

[0012] Furthermore, it is particularly preferred that the device also includes a jacking cylinder, which is connected to the top of the support rod via an elastic telescopic rod. The bottom of the jacking cylinder contacts the top of the rod. An annular indicator plate is fixed to the upper part of the support rod, and the indicator plate is located inside the jacking cylinder. An upper indicator ring is located inside the rod.

[0013] The beneficial effects of this invention are as follows:

[0014] This invention significantly improves the compensation driving force by setting up a dual driving force superposition mechanism of "hydraulic + pneumatic", which can respond quickly, especially under large clearance or high damping conditions, and avoid the risk of structural damage caused by compensation lag. At the same time, the pneumatic feedback mechanism does not require external energy and relies entirely on internal fluid linkage, which is energy-saving and environmentally friendly.

[0015] This invention achieves passive adaptive adjustment without an external power source through the above mechanism, with fast response speed and high reliability, and is particularly suitable for complex construction environments such as field, high altitude, and power outage. At the same time, the one-way valve ensures that the compensation process is irreversible, prevents malfunctions caused by vibration or temperature fluctuations, and improves system stability.

[0016] This invention utilizes a reflux assembly to achieve hydraulic oil reflux, enabling the support to be quickly reset without disassembly. This facilitates repeated use at multiple construction sites, reduces equipment costs, and improves construction efficiency. Furthermore, manual operation is simple and reliable, making it suitable for on-site working conditions.

[0017] This invention uses components such as limit blocks to form a limit locking mechanism, which can effectively prevent the first spring from fatigued and loosened during transportation or storage, thus extending the service life of the bracket. At the same time, it is easy to operate and can switch between "locked" and "unlocked" states without tools, improving the convenience of on-site use.

[0018] This invention consists of a prompting ring and a prompting plate. The prompting mechanism does not require electricity or sensors, but relies entirely on mechanical displacement to achieve visual early warning of the status, helping construction personnel to detect abnormalities in a timely manner, avoiding safety accidents caused by misjudgment, and improving construction safety. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a three-dimensional structural cross-sectional view of the present invention.

[0021] Figure 3 This is a three-dimensional structural diagram of the rod, hydraulic bladder, and one-way valve components of the present invention.

[0022] Figure 4 This is a three-dimensional structural diagram of the rod, hydraulic bladder, and pressing cylinder components of the present invention.

[0023] Figure 5 This is a three-dimensional structural diagram of the pressing cylinder of the present invention.

[0024] Figure 6 This is a three-dimensional structural diagram of the reflux valve body, valve stem, and handle of the present invention.

[0025] Figure 7 This is a three-dimensional structural diagram of the components of the present invention, including the pressing cylinder, the limiting block, and the sliding guide rail.

[0026] Figure 8 This is a three-dimensional structural diagram of the limiting block of the present invention.

[0027] Figure 9 This is a three-dimensional structural diagram of the components of the present invention, including the jacking cylinder, the indicator plate, and the elastic telescopic rod.

[0028] In the diagram: 101, rod body; 102, base; 103, hydraulic bladder; 104, one-way valve; 1041, flow channel; 105, bearing rod; 1051, movable cavity; 106, pressing cylinder; 107, air passage; 108, first spring; 109, sealing plug; 110, sealing cavity; 201, return valve body; 202, valve stem; 203, handle; 204, second spring; 301, sliding guide rail; 302, limiting block; 303, limiting groove; 304, guide groove; 401, jacking cylinder; 402, indicator plate; 403, elastic telescopic rod; 404, indicator ring. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0030] Example 1: As Figure 1 As shown, this invention provides an adjustable temporary support bracket for high-speed bridge installation, including a pole 101, with a base 102 fixedly connected to the bottom end of the pole 101. The pole 101 is a hollow cylindrical structure made of high-strength alloy steel, possessing excellent compressive strength and fatigue performance, suitable for repeated load-bearing conditions. The base 102 is formed by welding thickened steel plates, and its bottom is provided with anti-slip textures or anchoring holes, which can be stably connected to the ground, abutment, or temporary foundation to ensure the stability and safety of the overall support system during construction.

[0031] like Figures 3 to 4 As shown, a hydraulic bladder 103 is installed inside the rod body 101. The hydraulic bladder 103 is molded from multiple layers of composite rubber or polyurethane elastomer and filled with incompressible hydraulic oil (such as anti-wear hydraulic oil). In its initial state, it is in an inflated state and can push the pressing cylinder 106 upward, so that the first spring 108 is in a pre-stretched and energy-stored state, providing driving force for subsequent automatic compensation. The hydraulic bladder 103 has good airtightness and oil resistance, and is not prone to aging or leakage during long-term use, ensuring the reliability of the system.

[0032] like Figures 3 to 4As shown, a flow channel 1041 is formed inside the rod body 101. This flow channel 1041 is an axially penetrating oil passage that connects to the hydraulic bladder 103. A one-way valve 104 is installed inside the flow channel 1041. This one-way valve 104 adopts a spring-loaded cone valve structure, which only allows hydraulic oil to flow from the hydraulic bladder 103 into the flow channel 1041 in one direction. This effectively prevents backflow, ensures the unidirectionality and irreversibility of the compensation action, and avoids the risk of disengagement caused by the retraction of the bearing rod 105 due to external vibration.

[0033] like Figures 3 to 5 As shown, a pressing cylinder 106 and a bearing rod 105 are slidably connected to the left and right sides of the rod body 101, respectively. The bearing rod 105 is a precision-machined solid metal rod, the top of which is used to directly contact the bottom of the bridge beam to transmit vertical loads; its bottom end is provided with a piston part, which forms a sealed sliding fit with the inner wall of the rod body 101 to prevent hydraulic oil leakage. The pressing cylinder 106 is fixedly connected to the top of the hydraulic bladder 103 and moves synchronously with the deformation of the hydraulic bladder 103 to realize the direct transmission of force.

[0034] like Figures 3 to 4 As shown, a movable cavity 1051 is formed inside the rod 101 near the support rod 105. The flow channel 1041 is connected to the lower side of the movable cavity 1051, allowing hydraulic oil to enter the cavity under pressure and push the support rod 105 to slide upward. This structural design achieves linear output of hydraulic drive, with rapid response and smooth movement.

[0035] like Figure 3 As shown, a sealing cavity 110 is provided inside the rod body 101 to store compressed gas and enhance the system's responsiveness. A sealing plug 109 is fixedly connected to the side of the rod body 101 near the sealing cavity 110. The sealing plug 109 forms a sliding sealing pair with the pressing cylinder 106 using an O-ring to ensure good airtightness of the sealing cavity 110 and prevent gas leakage.

[0036] like Figure 3 and Figure 4 As shown, an air passage 107 connects the upper side of the movable chamber 1051 to the sealing plug 109. This air passage 107 is a fine-pore channel used to introduce air from above the movable chamber 1051 into the sealing chamber 110. When the support rod 105 slides upward, its piston compresses the space above, forcing air to enter the sealing chamber 110 through the air passage 107, thus increasing the air pressure inside the sealing chamber 110. This air pressure acts on the top of the pressing cylinder 106, forming an additional downward thrust, further enhancing the squeezing effect on the hydraulic bladder 103.

[0037] This "hydraulic + pneumatic" dual-drive force superposition mechanism significantly improves the compensation drive force, especially under large clearance or high damping conditions, it can still respond quickly and avoid the risk of structural damage caused by compensation lag; at the same time, the pneumatic feedback mechanism does not require external energy and relies entirely on internal fluid linkage, which is energy-saving and environmentally friendly.

[0038] like Figure 3 and Figure 4 As shown, a first spring 108 is fixed between the pressing cylinder 106 and the sealing plug 109. This spring is a helical tension spring, initially stretched to a preset length to store elastic potential energy. When a partial gap or disengagement occurs between the support and the beam, the first spring 108 adaptively rebounds, causing the pressing cylinder 106 to press down on the hydraulic bladder 103, thereby squeezing out the hydraulic oil inside. The squeezed-out hydraulic oil flows unidirectionally into the flow channel 1041 through the one-way valve 104. Under hydraulic action, the bearing rod 105 adaptively slides upward to re-contact the beam, automatically and dynamically compensating for minor displacements and preventing the beam from becoming detached from the ground. This structure achieves passive adaptive adjustment without an external power source, with fast response and high reliability, making it particularly suitable for complex construction environments such as fieldwork, high altitudes, and power outages. At the same time, the one-way valve 104 ensures that the compensation process is irreversible, preventing malfunctions caused by vibration or temperature fluctuations and improving system stability.

[0039] like Figure 4 and Figure 6 As shown, a return assembly for hydraulic oil return is provided inside the rod body 101. Specifically, it includes a return valve body 201, which is fixedly connected inside the rod body 101. The return valve body 201 connects the flow channel 1041 and the movable chamber 1051, forming a reverse flow path for hydraulic oil. A valve stem 202 is slidably connected inside the return valve body 201 in the vertical direction. A handle 203 is fixedly connected to the top of the valve stem 202 for easy manual operation. A second spring 204 is provided between the return valve body 201 and the valve stem 202. Under normal conditions, this spring presses the valve stem 202 against the valve seat of the return valve body 201, closing the return channel.

[0040] After supporting the bridge, pull handle 203 upwards, causing valve stem 202 to move upwards against the elastic force of second spring 204, opening the return channel. Then pull press cylinder 106 upwards, stretching hydraulic bladder 103 and first spring 108 upwards. Under negative pressure, some hydraulic oil in flow channel 1041 flows back into hydraulic bladder 103 through return valve body 201, restoring its initial state. This allows the support to be used for supporting the next bridge, enabling the bracket to be reused. This return design allows the bracket to be quickly reset without disassembly, facilitating its reuse across multiple construction points, reducing equipment costs, and improving construction efficiency. Simultaneously, manual operation is simple and reliable, suitable for on-site working conditions.

[0041] Example 2: Based on Example 1, such as Figure 7 and Figure 8As shown, it also includes a sliding guide rail 301, which is fixedly connected to the pressing cylinder 106. A limit block 302 is slidably connected inside the sliding guide rail 301 along the annular direction to limit the degree of freedom of movement of the pressing cylinder 106. A limit groove 303 is opened on the outer wall of the rod 101 near the limit block 302, and the limit block 302 slides in the limit groove 303. A guide groove 304 is opened on the outer side of the rod 101. When the limit block 302 slides along the limit groove 303 to align with the guide groove 304, it can slide up and down along the guide groove 304 to realize the free movement of the pressing cylinder 106.

[0042] After restoring the initial state by pulling the handle 203 upwards as described above, if no further support is needed for the next bridge, the limiting block 302 rotates relative to the sliding guide rail 301, causing the limiting block 302 to misalign with the guide groove 304. The limiting block 302 is thus locked within the limiting groove 303. At this point, even if the first spring 108 is in a stretched state, it cannot drive the pressing cylinder 106 downwards, achieving mechanical locking. When the support is in use, the limiting block 302 is rotated to align with the guide groove 304, allowing the first spring 108 to drive the bearing rod 105 for dynamic compensation.

[0043] In summary, this limit locking mechanism can effectively prevent the first spring 108 from fatigued and loosened during transportation or storage, thus extending the service life of the bracket. At the same time, it is easy to operate and can switch between "locked" and "unlocked" states without tools, improving the convenience of on-site use.

[0044] Example 3: Based on Example 2, such as Figure 1 , Figure 2 and Figure 9 As shown, it also includes a jacking cylinder 401, which is connected to the top of the support rod 105 via an elastic telescopic rod 403. The bottom of the jacking cylinder 401 contacts the top of the rod 101, forming a limiting support. An annular indicator plate 402 is fixedly connected to the upper part of the support rod 105. The indicator plate 402 is located inside the jacking cylinder 401 and is normally covered. An indicator ring 404 is also provided on the upper part of the support rod 105. The indicator ring 404 is located inside the rod 101 and can extend out of the rod 101 as the support rod 105 moves upward.

[0045] When the bearing rod 105 compensates upward to its limit position, the indicator ring 404 just extends out from the rod body 101. However, the limit does not necessarily mean that the bearing rod 105 is completely separated from the beam. If the beam is still in contact with the bearing rod 105 at this time, the jacking cylinder 401 is still pressed down by the beam, the elastic telescopic rod 403 is in a compressed state, and the indicator plate 402 is covered by the jacking cylinder 401. If the beam is completely separated, the elastic telescopic rod 403 extends upward to reset, and drives the jacking cylinder 401 to slide upward until it no longer covers the indicator plate 402. The operator can then visually observe that the indicator plate 402 is exposed, achieving a visual warning of the separation state. This indicator mechanism requires no electricity or sensors, relying entirely on mechanical displacement to achieve visual warning of the status, helping construction personnel to detect abnormalities in a timely manner, avoiding safety accidents caused by misjudgment, and improving construction safety.

[0046] In summary, this invention constructs a passive adaptive support system that requires no external energy through a hydraulic bladder 103, a one-way valve 104, and a spring-pneumatic linkage mechanism. It has multiple functions such as automatic compensation, rapid response, resettable, lockable, and early warning. It is compact, easy to maintain, safe and reliable, and is particularly suitable for high-speed bridge projects with extremely high requirements for construction accuracy and safety.

[0047] The above are merely embodiments of the present invention and are not intended to limit the invention. All equivalent substitutions made within the principles of the present invention should be included within the scope of protection of the present invention. Contents not described in detail in this invention are existing technologies known to those skilled in the art.

Claims

1. An adjustable temporary support bracket for high speed bridge installation, comprising a rod body (101), a base (102) is fixed to the bottom end of the rod body (101), characterized in that, The rod body (101) is provided with a hydraulic bag (103), a flow channel (1041) is opened in the rod body (101), a one-way valve (104) is arranged in the flow channel (1041), a bearing rod (105) and a pressing cylinder (106) are slidably connected in the rod body (101), the pressing cylinder (106) is fixedly connected with the top of the hydraulic bag (103), a movable cavity (1051) is opened in the rod body (101) near one side of the bearing rod (105), the flow channel (1041) is communicated with the lower side of the movable cavity (1051), the bottom end of the bearing rod (105) is provided with a piston part, a sealing cavity (110) is opened in the rod body (101), a sealing plug (109) is fixedly connected with the side of the rod body (101) near the sealing cavity (110), the pressing cylinder (106) is slidably connected with the sealing plug (109), the upper side of the movable cavity (1051) and the sealing plug (109) are communicated with an air channel (107), the first spring (108) is fixedly connected between the pressing cylinder (106) and the sealing plug (109), and the rod body (101) is provided with a backflow assembly for backflow of hydraulic oil; The backflow assembly comprises a backflow valve body (201), the backflow valve body (201) is fixedly connected in the rod body (101), the backflow valve body (201) is communicated between the flow channel (1041) and the movable cavity (1051), the valve rod (202) is slidably connected in the backflow valve body (201), and the second spring (204) is arranged between the backflow valve body (201) and the valve rod (202); The sliding guide rail (301) is fixedly connected with the pressing cylinder (106), the sliding guide rail (301) is slidably connected with the limiting block (302), the limiting groove (303) is opened in the outer wall of the rod body (101) near the limiting block (302), the limiting block (302) slides in the limiting groove (303), the guide groove (304) is opened on the outer wall of the rod body (101), when the limiting block (302) slides to the position opposite to the guide groove (304) along the limiting groove (303), the limiting block (302) slides up and down along the guide groove (304); The top driving cylinder (401) is connected to the top end of the bearing rod (105) through the elastic telescopic rod (403), the bottom of the top driving cylinder (401) is in contact with the top end of the rod body (101), the annular prompt plate (402) is fixedly connected to the upper part of the bearing rod (105), the prompt plate (402) is located in the top driving cylinder (401), and the prompt ring (404) is arranged on the upper part of the bearing rod (105) and located in the rod body (101).

2. An adjustable temporary support bracket for high speed bridge installation as claimed in claim 1, wherein, The one-way valve (104) controls the one-way flow of the hydraulic oil in the hydraulic bag (103) into the flow channel (1041).

3. An adjustable temporary support bracket for high speed bridge installation as claimed in claim 2, wherein, The handle (203) is fixedly connected to the valve rod (202).

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