A stepped automatic height adjustment support height engagement adjustment and multi-stepped adjustment method

Abstract

The present application belongs to the technical field of bridge engineering support height adjustment, and relates to a stepped automatic height adjustment support height engagement adjustment and multi-step adjustment method, which comprises the following steps: lifting a fixed stepped block to a preset height, wherein the preset height is greater than a target height by no more than a stepped height; keeping the lifting state of the fixed stepped block, and driving a movable stepped block to move horizontally to abut against the vertical surface of the fixed stepped block; keeping the position of the movable stepped block, and releasing the lifting of the fixed stepped block, so that the fixed stepped block falls and sits on the movable stepped block. Through the cooperation logic of the vertical preset height and the horizontal abutment, the present application reduces the vertical lifting displacement control precision requirement, and the fixed stepped block and the movable stepped block always remain in a close engagement state after the height adjustment is completed, so as to ensure that the tooth force transmission area is maximized, and the present application is suitable for the height adjustment scene of the change of the bridge girder or the pier top elevation.

Description

Technical Field

[0001] This invention relates to the field of bridge engineering bearing height adjustment technology, and in particular to a stepped automatic height adjustment bearing engagement adjustment and multi-step adjustment method. Background Technology

[0002] As a crucial component connecting the main girder and piers of a bridge, the height of bridge bearings needs to be adjusted in real time according to changes in the elevation of the main girder and pier tops to ensure the rationality of the bridge structure's stress distribution and its operational safety. In existing technologies, stepped automatic height-adjusting bearings employ a structure with multiple stepped blocks. The control precision requirements for vertical lifting displacement and horizontal adjustment displacement during the height adjustment process are extremely high, typically within ±1mm. Even minor errors can easily lead to loose interlocking of the upper and lower stepped blocks, resulting in reduced force transmission area and unclear force transmission paths, affecting the bearing's vertical support capacity and structural safety. Furthermore, during bearing height adjustment, if the coordination logic between vertical lifting and horizontal adjustment is unreasonable, or the matching between the lifting height and horizontal adjustment is poor, situations may arise after adjustment where the vertical surfaces of the stepped blocks are not tightly engaged, or the tooth meshing clearance is too large. Under bridge live loads and earthquake conditions, this can cause problems such as horizontal displacement and uneven vertical stress on the bearing, and in severe cases, it can even affect the overall stability of the bridge structure. In addition, traditional height adjustment methods have a low degree of automation. During the adjustment process, the displacement and engagement status need to be checked repeatedly by humans, which is inefficient and difficult to adapt to the development needs of intelligent bridge operation and maintenance.

[0003] Publication No.: CN107447652A A height-adjustable spherical bearing comprises a bearing body system, a bridge deck height monitoring system, a height adjustment system, and a control system. The bridge deck height monitoring system is connected to the control system. The control system controls the height adjustment system to adjust the bridge deck height lifted by the bearing body system. The height adjustment system is located below the bearing body system and consists of stepped blocks, wedge blocks, multiple vertical jacking devices corresponding to the lower surface of the lower seat plate, horizontal jacking devices connected to the wedge blocks, and a base plate. When the bridge deck height monitored by the bridge deck height monitoring system reaches the required height, the vertical height adjustment amount of the bearing is first set. Then, the control system and the vertical jacking devices are activated to lift the lower seat plate to the preset height. Next, the horizontal jacking devices are activated to adjust the wedge blocks to the set horizontal position, so that the stepped blocks completely fall onto the wedge blocks. Then, the vertical force of the vertical jacking devices of the control system is unloaded, and the vertical height adjustment of the bearing is completed. However, this technical solution only requires a vertical lifting height of slightly more than 1mm before direct horizontal pushing and finally unloading. Fluctuations in the hydraulic system and errors in the sensors make it difficult to maintain the actual height stably within such a small tolerance range. If the lifting is too high, the wedge block will hit the side of the step block when pushed in; if the lifting is insufficient, the wedge block will get stuck when pushed in.

[0004] In summary, the existing height adjustment methods for stepped height adjustment supports have technical defects such as high control precision requirements, poor reliability of stepped block engagement, unstable force transmission performance, and low degree of automation. A new height adjustment method is urgently needed to solve these problems. Summary of the Invention

[0005] In view of this, the present invention aims to propose a stepped automatic height adjustment support with meshing adjustment and multi-step adjustment method to solve the problems of poor meshing reliability of stepped blocks, unstable force transmission performance and low degree of automation of existing height adjustment supports.

[0006] This invention abandons the traditional reliance on vertical jacking accuracy (such as ±0.1mm level). By using a height adjustment method that combines a preset vertical height of the stepped blocks with adaptive horizontal tightening, the displacement control accuracy requirement for vertical jacking during the adjustment process is reduced to ±2mm. This reduces the difficulty and cost of equipment control without affecting the final height adjustment accuracy. By utilizing the rigid tightening force in the horizontal direction, it ensures that the upper and lower stepped blocks are always in a tight meshing state after the height adjustment is completed. This ensures that the force transmission area of ​​the stepped block teeth is maximized, achieving a clear vertical force transmission path and a simple force transmission mode, thereby improving the safety and reliability of the support structure. Furthermore, it breaks through the traditional thinking of symmetrical multi-wedge block settings in existing technologies. By utilizing a toothed engagement height adjustment structure that adapts to a single fixed step block + a single movable step block, it eliminates the complex logic and hardware of multi-point synchronous control. Through precise lifting-adjustment-unloading coordination, it fully leverages the vertical force transmission advantage of the structure, improving the stability and efficiency of the adjustment process. Moreover, this structure facilitates the automated control of the adjustment process, eliminating the need for repeated manual verification. It is compatible with intelligent bridge height adjustment systems, enhancing the level of intelligent operation and maintenance of bridge bearings.

[0007] To achieve the above objectives, the technical solution of the present invention is implemented as follows:

[0008] One objective of this invention is to disclose a stepped automatic height adjustment support height engagement adjustment and multi-step adjustment method. The method, characterized by the following specific steps:

[0009] The fixed step block is lifted to a preset height, which is no more than one step higher than the target height.

[0010] Keep the fixed step block in the raised state, and drive the movable step block to move horizontally until it is pressed against the vertical surface of the fixed step block;

[0011] Maintain the position of the movable step block, release the lifting of the fixed step block, and allow the fixed step block to fall and sit on the movable step block.

[0012] Furthermore, the difference between the preset height and the target height is half a step height.

[0013] Furthermore, the height of each step is 5mm, and the range of the difference h between the preset height and the target height is 1mm. <h<5mm。

[0014] Furthermore, after the movable step block is moved horizontally to be pressed against the vertical surface of the fixed step block, the pressing state is confirmed by a torque sensor.

[0015] Furthermore, the bottom of the fixed step block has an inverted step-like structure, and the top of the movable step block has a positive step-like structure.

[0016] Furthermore, after the lifting of the fixed step block is released, the fixed step block falls vertically under its own weight.

[0017] Furthermore, it also includes a single-step vertical lowering step:

[0018] Lift the fixed step block to separate it from the movable step block;

[0019] Drive the movable step block horizontally to a preset position away from the fixed step block;

[0020] The fixed step block is lowered to a preset lowering height, which is less than the target lowering height by no more than one step height.

[0021] Drive the movable step block horizontally until it is pressed against the vertical surface of the fixed step block;

[0022] Release the lifting of the fixed step block, allowing it to fall and rest on the movable step block.

[0023] Furthermore, the difference between the preset reduction height and the target reduction height is half a step height.

[0024] Furthermore, when the total adjustment amount is an integer multiple of a step height, the total adjustment amount is decomposed into several single adjustment amounts, each adjustment amount being the target height. The aforementioned step-type automatic height adjustment support engagement adjustment method is executed at least once to successively complete the continuous cumulative adjustment of the support height.

[0025] Furthermore, after each adjustment is completed, the actual elevation of the fixed step block is checked. Only after confirming that the adjustment has reached a target height can the next cycle begin.

[0026] Compared with the prior art, the step-type automatic height adjustment support engagement adjustment and multi-step adjustment method of the present invention has the following advantages:

[0027] 1. This invention employs a height adjustment strategy combining vertical coarse positioning of the stepped blocks with adaptive horizontal tightening. This significantly relaxes the requirements for displacement control precision of the vertical lifting equipment during the height adjustment process, fundamentally reducing the reliance on high-precision sensors and complex control algorithms. It solves the technical problem of stepped blocks becoming misaligned or jammed due to minute vertical positioning errors. By using rigid tightening force in the horizontal direction to forcibly eliminate gaps caused by the preset vertical height, it ensures that the upper and lower stepped blocks are always in a tight, gapless meshing state after the height adjustment is completed. This guarantees the absolute accuracy of the final height adjustment, maximizes the contact area of ​​the stepped teeth, avoids local stress concentration, constructs a clear and simple vertical force transmission path, and improves the force transmission stability and structural safety of the support under long-term loads.

[0028] 2. This invention monitors the support height deviation and stress state in real time, and adjusts the vertical lifting device and horizontal tightening mechanism in a coordinated manner. It dynamically matches the height adjustment stroke and the locking force, ensuring the height adjustment accuracy while avoiding stress concentration caused by over-positioning. It realizes the conversion between low-precision equipment input and high-precision locking output, improves the stability and efficiency of the adjustment process, and reduces the power consumption of the pump station and carbon emissions during construction. Attached Figure Description

[0029] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0030] Figure 1 This is a schematic diagram of the longitudinal bridge half-section structure of the height adjustment support structure of the present invention;

[0031] Figure 2 This is a flowchart of the single-step meshing height adjustment logic of the height adjustment support of the present invention;

[0032] Figure 3 This is a flowchart illustrating the logic flow for adjusting the single-step meshing of the support in this invention.

[0033] Explanation of reference numerals in the attached figures:

[0034] 1. Standard finished support; 2. Adjustable upper support plate; 3. Fixed step block; 4. Movable step block; 5. Horizontal transmission device; 6. Lowered support plate; 7. Guide column; 8. Vertical lifting device. Detailed Implementation

[0035] To make the technical means and objectives and effects of the present invention easier to understand, the embodiments of the present invention will be described in detail below with reference to specific illustrations.

[0036] It should be noted that all directional and positional terms used in this invention, such as "up," "down," "left," "right," "front," "back," "vertical," "horizontal," "inner," "outer," "top," "lower," "lateral," "longitudinal," and "center," are only used to explain the relative positional relationships and connections between components in a specific state. They are merely for the convenience of describing the invention and do not require the invention to be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on the invention. Furthermore, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0037] In the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0038] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0039] like Figures 1-3 As shown, this invention provides a method for adjusting the height of an automatic stepped height-adjusting support. This method is based on a toothed engagement structure of a height-adjusting support consisting of a single fixed step block and a single movable step block. Through an innovative vertical preset height of the step block plus a horizontal tightening adaptive control logic, the vertical lifting displacement control accuracy requirement during the height adjustment process is reduced to ±2mm. Furthermore, after the height adjustment is completed, the upper and lower step blocks remain in a tightly engaged state, ensuring maximum force transmission area and a clear force transmission path. Simultaneously, it is compatible with intelligent height-adjusting systems to achieve automated control.

[0040] Specifically, such as Figure 1 As shown, the height adjustment support upon which this invention relies includes, from top to bottom, a standard finished support 1, a height adjustment upper support plate 2, a fixed step block 3, a movable step block 4, a horizontal transmission device 5, a height adjustment lower support plate 6, a guide column 7, a vertical lifting device 8, and a height adjustment control system.

[0041] The fixed step block 3 has an inverted step-like structure at the bottom, while the movable step block 4 has a regular step-like structure at the top. The two are connected by teeth to achieve vertical force transmission. After the teeth are engaged, the vertical load is directly transmitted through the tooth surface. The force transmission path is short and clear, which solves the technical problems of circuitous force transmission path and stress concentration in traditional wedge block height adjustment structures.

[0042] In some embodiments, the movable step block 4 is wedge-shaped, with a plurality of steps evenly distributed on its surface. This wedge-shaped step structure enables the movable step block 4 to engage with the fixed step block 3 in multiple stages during horizontal movement, further improving the height adjustment accuracy and engagement reliability.

[0043] The lowering seat plate 6 is fixed to the pier to ensure a reliable connection between the entire support system and the pier. Based on this, in order to achieve active adjustment of the support height, at least one vertical lifting device 8 is set between the lower adjusting seat plate 6 and the upper adjusting seat plate 2, which is used to lift the upper adjusting seat plate 2 and drive the fixed step block 3 to rise and fall.

[0044] To achieve precise engagement between the step blocks, the movable step block 4 also needs to be horizontally adjusted to solve the technical problem of asynchronous horizontal adjustment and vertical lifting in traditional height adjustment methods, which leads to collision or jamming of the step blocks. The horizontal transmission device 5 is used to adjust the horizontal position of the movable step block 4.

[0045] To ensure the reliability and consistency of the tightening state, a torque sensor is installed at the output shaft of the horizontal transmission device 5. The torque sensor is used to monitor the output torque value of the horizontal transmission device 5 in real time. In some embodiments, after the movable step block 4 is driven to move horizontally until it is tightened against the vertical surface of the fixed step block 3, the tightening state is confirmed by the torque sensor. Specifically, the horizontal transmission device 5 drives the movable step block 4 to move towards the fixed step block 3. When the vertical surface of the movable step block 4 contacts the vertical surface of the fixed step block 3 and continues to tighten, the output torque of the horizontal transmission device 5 gradually increases. The torque sensor monitors the output torque value in real time. When the torque value reaches a preset threshold, it is determined that the two are completely tightened. At this time, the height control system issues a stop command, and the horizontal transmission device 5 stops driving.

[0046] This design solves the technical problems of gaps in the meshing of the fixed step block 3 and the movable step block 4 due to insufficient clamping force, or overload damage to the horizontal transmission device 5 due to excessive clamping force, thus ensuring the reliability and consistency of the clamping state.

[0047] To ensure the straightness of the vertical movement of the fixed step block 3 during the jacking process, several guide columns 7 are evenly distributed around the circumference. Furthermore, to achieve real-time monitoring and closed-loop control of the jacking displacement, the guide columns 7 also integrate displacement detection functionality.

[0048] In some embodiments, a displacement sensor is provided between the upper and lower columns to detect the relative displacement between them. This displacement sensor can monitor the lifting displacement in real time and feed the displacement signal back to the height adjustment control system, providing data support for the closed-loop control of the vertical lifting device 8 and solving the technical problem of difficulty in ensuring the accuracy of lifting displacement control.

[0049] To address the technical problem of low efficiency caused by repeated manual verification in traditional height adjustment methods, the height adjustment control system receives bridge elevation signals transmitted from the monitoring system and automatically controls the actions of each functional component of the height adjustment support according to pre-set control logic.

[0050] Specifically, the control system forms a closed-loop control link with the displacement sensor, the vertical lifting device 8, and the horizontal transmission device 5. The displacement sensor collects the lifting displacement data in real time and feeds it back to the control system. After comparing and calculating the measured value with the preset value, the control system sends corresponding control commands to the vertical lifting device 8 and the horizontal transmission device 5, realizing the automated control of the height adjustment process.

[0051] Preferably, the control system also has the following functions:

[0052] Automatic judgment and decision-making: Based on the bridge elevation signal, it automatically determines whether an elevation adjustment is needed and by how much, without manual intervention;

[0053] Fault self-diagnosis: Real-time monitoring of the working status of each actuator; when an abnormality is detected, an alarm is automatically triggered and the adjustment operation is stopped.

[0054] Data recording and traceability: Record key data (including jacking displacement, horizontal jacking force, jacking amount, etc.) during each height adjustment process to facilitate later maintenance and traceability analysis.

[0055] Through the above settings, the control system not only automates the height adjustment process, but also significantly improves the reliability, safety and traceability of the height adjustment operation, solving the technical problems of traditional height adjustment methods that rely on manual experience, have low operating efficiency and are difficult to record data.

[0056] This invention achieves tight engagement of the stepped blocks by combining steps of lifting to a preset height, horizontal tightening adjustment, and precise unloading and placement, while reducing the requirements for displacement control accuracy. Specifically, it includes a single-step adjustment method and a multi-step cumulative adjustment method.

[0057] The specific steps of the single-step adjustment method include:

[0058] The fixed step block 3 is lifted to a preset height, which is no more than one step higher than the target height; preferably, the excess lifting amount is half a step height.

[0059] While keeping the fixed step block 3 in the raised state, the horizontal transmission device 5 drives the movable step block 4 to move horizontally until it is pressed against the vertical surface of the fixed step block 3.

[0060] Keep the movable step block 4 in position, release the lifting of the fixed step block 3, and let the fixed step block 3 fall and sit on the movable step block 4.

[0061] By designing a vertical preset height, and combining it with the control logic of vertical preset height + horizontal vertical clamping + gravity placement, the fixed step block 3 and the movable step block 4 are always in a tightly engaged state after unloading, ensuring that the force transmission area of ​​their teeth is maximized. This achieves a clear force transmission path and a simple force transmission mode, reducing the vertical lifting displacement control accuracy requirement from ±1mm in the existing technology. This significantly reduces the accuracy requirements of the lifting equipment and control system, and reduces the equipment development and usage costs.

[0062] Specifically, the fixed step block 3 is raised to a height exceeding the target elevation by half a step.

[0063] Preferably, when the height of a step is 5mm, the range of the difference h between the preset height and the target height is 1mm < h < 5mm.

[0064] While keeping the fixed step block 3 in the raised state, drive the movable step block 4 to move horizontally until it is pressed tightly against the vertical surface of the fixed step block 3.

[0065] In some embodiments, after the movable step block 4 is driven to move horizontally until it is pressed against the vertical surface of the fixed step block 3, the pressing state is confirmed by a torque sensor.

[0066] Specifically, the horizontal transmission device 5 drives the movable step block 4 to move towards the fixed step block 3. When the vertical surface of the movable step block 4 contacts and continues to press against the vertical surface of the fixed step block 3, the output torque of the horizontal transmission device 5 gradually increases. The torque sensor monitors the output torque value in real time. When the torque value reaches a preset threshold, it is determined that the two are fully pressed together. At this time, the height adjustment control system issues a stop command, and the horizontal transmission device 5 stops driving.

[0067] This design solves the technical problems of gaps in the meshing of the fixed step block 3 and the movable step block 4 due to insufficient clamping force, or overload damage to the horizontal transmission device 5 due to excessive clamping force, thus ensuring the reliability and consistency of the clamping state.

[0068] In this invention, the step height refers to the height of a single step in the inverted step-like structure at the bottom of the fixed step block 3, or the height of a single step in the upright step-like structure at the top of the movable step block 4. These two are matched, and the height of a single step is the minimum unit of adjustment for a single lift. Preferably, the height of a single step is 5mm.

[0069] When the total height to be increased is one step, the target height is also one step. When the target height to be increased is multiple steps, the total adjustment can be broken down into several single adjustment amounts, each corresponding to one step, and completed step by step through a multi-step cumulative adjustment method. Alternatively, a single adjustment can be used: the fixed step block 3 is raised to within one step of the target height, then horizontally tightened and lowered, directly completing the adjustment of multiple steps. However, in this case, it must be ensured that the preset vertical lifting height matches the total adjustment amount.

[0070] When the single-step height adjustment and single-step height adjustment of this method are both fixed values ​​of 5mm.

[0071] Steps for vertical height adjustment of a single staircase:

[0072] Step 1: Vertical preset height lifting. The height adjustment control system issues a height adjustment command, activating the vertical lifting device 8, which lifts the upper mounting plate 2 and drives the fixed step block 3 to rise vertically until the actual elevation of the fixed step block 3 is 2.5mm higher than the target elevation of the set single-step height adjustment, thus completing the vertical preset height. During this process, the displacement control accuracy of the vertical lifting device 8 is allowed to have an error of ±2mm.

[0073] Step 2, horizontal tightening adjustment. Maintain the preset height of the vertical lifting device 8, start the horizontal transmission device 5, and adjust the movable step block 4 to move towards the fixed step block 3 until the vertical surface of the positive step structure of the movable step block 4 is fully tightened with the vertical surface of the inverted step structure of the fixed step block 3, so as to achieve vertical guide alignment of the teeth of the two.

[0074] Preferably, after the movable step block 4 is driven to move horizontally until it is pressed against the vertical surface of the fixed step block 3, the pressing state is confirmed by a torque sensor. Specifically, the horizontal transmission device 5 drives the movable step block 4 to move towards the fixed step block 3. When the vertical surface of the movable step block 4 contacts the vertical surface of the fixed step block 3 and continues to press against it, the output torque of the transmission device gradually increases. The torque sensor monitors the output torque value in real time. When the torque value reaches a preset threshold, it is determined that the two are fully pressed against each other. At this time, the control system issues a stop command, and the horizontal transmission device 5 stops driving. This setting ensures the reliability and consistency of the pressing state and solves the technical problems of gaps in the engagement of the step blocks due to insufficient pressing force or overload damage to the transmission device due to excessive pressing force.

[0075] Step 3, Precise Unloading and Positioning. Maintaining the horizontally tightened position of the movable step block 4, control the vertical lifting device 8 to slowly unload, allowing the fixed step block 3 to fall vertically under its own weight, ultimately settling on the movable step block 4, completing the single-step elevation. At this point, the teeth of the fixed step block 3 and the movable step block 4 are tightly engaged, and the vertical force transmission area is at its maximum.

[0076] Single-step vertical lowering steps:

[0077] Step 1: Vertical Lifting and Disengagement. The height control system issues a lowering command, activating the vertical lifting device 8 to lift the upper support as a whole, completely unloading the previously interlocking fixed step block 3 and movable step block 4, thus removing them from the stress state.

[0078] Step 2: Horizontally move the movable step block backward. While maintaining the lifting state of the vertical lifting device 8, activate the horizontal transmission device 5 to pull the movable step block 4 away from the fixed step block 3 to the preset position, reserving horizontal adjustment space for lowering the step block.

[0079] Step 3, Vertical pre-lowering allowance. Control the vertical lifting device 8 to slowly and synchronously descend, stopping when it reaches the position corresponding to the set single-step lowering height, which is 2.5mm less than the target lowering height. This 2.5mm is a vertical displacement allowance, providing adaptive adjustment space for the subsequent precise clamping and engagement of the step blocks.

[0080] Step 4, Horizontal Tightening Adjustment. Keep the vertical lifting device 8 in the pre-lowered state, start the horizontal transmission device 5, and push the movable step block 4 to move horizontally towards the fixed step block 3 until the vertical surface of the positive step structure of the movable step block 4 is fully tightened with the vertical surface of the inverted step structure of the fixed step block 3, so as to achieve vertical guide alignment of the teeth of the two.

[0081] Step 5, Precise Unloading and Positioning. Maintaining the horizontally tightened position of the movable step block 4, control the vertical lifting device 8 to slowly unload, allowing the fixed step block 3 to fall vertically under its own weight, ultimately resting on the movable step block 4, completing the single-step lowering. At this point, the teeth of the fixed step block 3 and the movable step block 4 are tightly engaged, and the vertical force transmission area is at its maximum.

[0082] Multi-step cumulative adjustment method:

[0083] When the total adjustment amount is an integer multiple of a step height, the total adjustment amount is decomposed into several single adjustment amounts, each adjustment amount being a target height. The above single-step adjustment method is executed at least once to complete the continuous cumulative adjustment of the support height step by step, ultimately achieving accurate reset of the overall support elevation and stable restoration of the structural stress state.

[0084] Throughout the multi-step cumulative adjustment process, each adjustment maintains the same operational procedures, control precision requirements, and engagement guarantee mechanisms as a single-step adjustment. After each height adjustment is completed, the actual elevation of the fixed step block is checked. Once it is confirmed that the height adjustment has reached a target height, the next cycle begins, continuing until the cumulative adjustment reaches the total design adjustment, ultimately completing the overall adjustment of the support height.

[0085] This invention allows for a displacement error of ±2mm during vertical lifting. Its adaptive fault-tolerant principle is as follows: even if there is a ±2mm error between the actual height of the vertical lifting and the preset height value of 2.5mm, the movable step block 4 can still be fully clamped to the vertical surface of the fixed step block 3 under the drive of the horizontal transmission device 5. After the vertical jack is unloaded, the inverted step structure of the fixed step block 3 will automatically fit with the positive step structure of the movable step block 4 under the action of gravity, ultimately ensuring that the teeth of the two are always tightly engaged, and the final height adjustment accuracy is not affected by the lifting error.

[0086] Example 1

[0087] like Figure 1 and Figure 2 As shown in the figure, this embodiment takes the main beam of a bridge that needs to be raised by 5mm in a single adjustment as an example to illustrate the method of the present invention in detail.

[0088] Step 1: Vertically lift to the preset height;

[0089] The intelligent height adjustment control system receives signals from the elevation monitoring subsystem, determines that a single-step elevation of 5mm is required, and issues a height adjustment command. The hydraulic jack (vertical lifting device 8) is activated to lift the upper seat plate 2 and drive the fixed step block 3 to rise until the elevation of the fixed step block 3 is 2.5mm higher than the target elevation (+5mm), at which point the jack stops lifting.

[0090] In this embodiment, the actual lifting height of the jack is 2.3mm (error -0.2mm), which meets the accuracy requirement of ±2mm. Therefore, even if the lifting height does not precisely reach the theoretical value of 2.5mm, it does not affect the normal operation of subsequent steps, demonstrating the adaptive fault-tolerant capability of this invention.

[0091] Step 2: Adjust the horizontal clamping force;

[0092] With the jack in the lifting position, start the servo motor (horizontal transmission device 5) to drive the ball screw to rotate, causing the movable step block 4 to move horizontally towards the fixed step block 3 until the vertical surface of the movable step block 4 is fully engaged with the vertical surface of the fixed step block 3. Stop the motor and confirm the engagement status using the torque sensor.

[0093] In this embodiment, the clamping state is confirmed by a torque sensor: a torque sensor is installed on the output shaft of the servo motor to monitor the output torque value in real time. When the vertical surface of the movable step block 4 contacts the vertical surface of the fixed step block 3 and continues to clamp, the torque value gradually increases; when the torque value reaches a preset threshold, the control system determines that the two are fully clamped and issues a stop command, and the motor stops running. At this time, although there is a negative error of 0.2mm in the preset vertical height, since the vertical surface of the movable step block 4 and the vertical surface of the fixed step block 3 have achieved physical clamping, the teeth of the two have formed accurate guide alignment in the vertical direction, laying the foundation for subsequent unloading and placement.

[0094] Step 3, accurately unload and place the equipment;

[0095] Keeping the movable step block 4 stationary, the hydraulic jack is slowly unloaded. The fixed step block 3 falls vertically under gravity, eventually settling on the movable step block 4, and the jack is completely unloaded. At this point, the elevation monitoring subsystem detects that the actual elevation of the fixed step block 3 has increased by 5mm compared to the initial elevation, matching the target elevation. Furthermore, the teeth of the fixed step block 3 and the movable step block 4 are tightly engaged, maximizing the force transmission area.

[0096] This embodiment verifies that even with vertical lifting errors, the method of the present invention can still achieve precise height adjustment and reliable tooth meshing through horizontal tightening adaptive adjustment and gravity self-adhesion.

[0097] Example 2

[0098] like Figure 1 and Figure 3 As shown in the figure, this embodiment takes the example of lowering the top elevation of a bridge pier by 5mm in a single operation to illustrate the method of the present invention.

[0099] Step 1: Vertically lift and detach;

[0100] The height control system issues a lowering command, which activates the hydraulic jack (vertical lifting device 8) to lift the upper support as a whole, so that the original interlocking fixed step block 3 and movable step block 4 are completely unloaded and removed from the stress state.

[0101] Step 2: Move the movable step block horizontally backward;

[0102] Maintain the lifting state of the hydraulic jack, start the servo motor (horizontal transmission device 5), and pull the movable step block 4 to move away from the fixed step block 3 to the preset position, so as to reserve horizontal adjustment space for the step block to be lowered.

[0103] Step 3: Vertical pre-lowering allowance;

[0104] The hydraulic jack is controlled to descend slowly and synchronously, stopping when it reaches the position corresponding to the set single-step lowering height (5mm), which is 2.5mm less than the target lowering height. That is, the jack stops after descending 2.5mm. This 2.5mm allows for vertical displacement margin, providing adaptive adjustment space for precise tightening and engagement of subsequent step blocks.

[0105] Step 4: Adjust the horizontal clamping force;

[0106] Maintain the pre-lowering state of the hydraulic jack, start the servo motor, and push the movable step block 4 horizontally towards the fixed step block 3 until the vertical surface of the positive step structure of the movable step block 4 is fully engaged with the vertical surface of the inverted step structure of the fixed step block 3, thereby achieving vertical alignment of the teeth of the two.

[0107] Step 5: Precisely unload and place the equipment.

[0108] Keeping the movable step block 4 horizontally and firmly in place, the hydraulic jack is slowly unloaded, allowing the fixed step block 3 to fall vertically under its own weight and finally rest on the movable step block 4, completing the single-step lowering. At this point, the teeth of the fixed step block 3 and the movable step block 4 are tightly engaged, and the vertical force transmission area is at its maximum. The actual lowering amount is 5mm, consistent with the target value.

[0109] Example 3

[0110] This example uses a bridge main beam that needs to be raised by a cumulative 15mm due to settlement.

[0111] Following the steps in Example 1, raise the height by 7.5mm (i.e., raise it to 2.5mm above the target elevation, then lower it horizontally). The actual height adjustment is 5mm. If a cumulative height adjustment of 15mm is required, a multi-step cumulative adjustment method can be used, with each target height being 5mm, divided into three adjustments, each performed according to the steps in Example 1.

[0112] After each height adjustment, the system monitors and verifies the current elevation of the support in real time. Once it confirms that the teeth of the fixed step block 3 and the movable step block 4 are tightly engaged, and that the cumulative height adjustment has reached the expected value, the system proceeds to the next adjustment cycle. After three adjustments, when the cumulative height adjustment reaches 15mm, the height adjustment control system issues an adjustment completion signal, ending the height adjustment process.

[0113] This embodiment verifies the stability and reliability of the method of the present invention during the adjustment process. Each single-step adjustment strictly follows the core logic of "vertical preset height of 2.5mm + horizontal tightening self-adaptation", and the control precision requirement for each adjustment remains unchanged. Precise cumulative height adjustment is achieved through cyclic progression.

[0114] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for adjusting the height of a stepped automatic height-adjusting support, characterized in that, The specific steps include: The fixed step block is lifted to a preset height, which is no more than one step higher than the target height. Keep the fixed step block in the raised state, and drive the movable step block to move horizontally until it is pressed against the vertical surface of the fixed step block; Maintain the position of the movable step block, release the lifting of the fixed step block, and allow the fixed step block to fall and sit on the movable step block.

2. The step-type automatic height adjustment support height engagement adjustment method according to claim 1, characterized in that, The difference between the preset height and the target height is half a step height.

3. The step-type automatic height adjustment support height engagement adjustment method according to claim 1, characterized in that, The height of each step is 5mm, and the range of the difference h between the preset height and the target height is 1mm. <h<5mm。 4. The step-type automatic height adjustment support height engagement adjustment method according to claim 1, characterized in that, After the movable step block is moved horizontally and pressed against the vertical surface of the fixed step block, the pressing status is confirmed by the torque sensor.

5. The step-type automatic height adjustment support height engagement adjustment method according to claim 1, characterized in that, The bottom of the fixed step block has an inverted step shape, and the top of the movable step block has a regular step shape.

6. The step-type automatic height adjustment support height engagement adjustment method according to claim 1, characterized in that, After the lifting of the fixed step block is released, the fixed step block falls vertically under its own weight.

7. The step-type automatic height adjustment support height engagement method according to claim 1, characterized in that, It also includes a single-step vertical lowering step: Lift the fixed step block to separate it from the movable step block; Drive the movable step block horizontally to a preset position away from the fixed step block; The fixed step block is lowered to a preset lowering height, which is less than the target lowering height by no more than one step height. Drive the movable step block horizontally until it is pressed against the vertical surface of the fixed step block; Release the lifting of the fixed step block, allowing it to fall and rest on the movable step block.

8. The step-type automatic height adjustment support height engagement adjustment method according to claim 1, characterized in that, The difference between the preset reduction height and the target reduction height is half a step height.

9. A multi-step adjustment method, characterized in that, When the total adjustment amount is an integer multiple of a step height, the total adjustment amount is decomposed into several single adjustment amounts, each adjustment amount being the target height. The step-type automatic height adjustment support engagement adjustment method described in claims 1-8 is executed at least once to complete the continuous cumulative adjustment of the support height step by step.

10. The multi-step adjustment method according to claim 9, characterized in that, After each height adjustment is completed, the actual elevation of the fixed step block is checked. Once it is confirmed that the height adjustment has reached a target height, the next cycle will begin.

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