Automatic opening and closing system of hydraulic side form for precast box girder

Abstract

The application relates to the technical field of prefabricated box girder, and discloses a prefabricated box girder hydraulic side mold automatic opening and closing system, which comprises a data acquisition module used for acquiring relevant data information in a prefabricated box girder process; a control center comprising a processing module, an analysis module and an interactive module, the processing module is used for performing a pretreatment operation on the acquired relevant data information, the analysis module performs analysis based on the processed data, judges whether the size of the box girder is within a set size, and the interactive module is used for implementing man-machine interaction; and a hydraulic execution module performs corresponding execution operations according to the control center instructions. According to the application, the accumulated offset in a cycle can be analyzed under the condition that the size of the prefabricated box girder is normal, the size abnormality risk of the prefabricated box girder is judged, timely fine adjustment and correction are performed, the occurrence of subsequent abnormalities is avoided, and the size precision of the box girder is ensured.

Description

Technical Field

[0001] This application relates to the field of precast box girder technology, specifically to an automatic opening and closing system for hydraulic side molds of precast box girders. Background Technology

[0002] Precast box girders are box-shaped concrete beams that are precast and cured in a specialized precast beam yard according to design drawings and construction specifications. Due to their superior structural performance, strong integrity, high torsional stiffness, wide range of adaptability, and ease of factory and standardized production, precast box girders have become one of the most common and critical load-bearing structural components and are therefore widely used in the construction of large-scale infrastructure such as modern bridges and rail transit.

[0003] Traditional methods for opening and closing the side formwork of precast box girders primarily rely on manual or semi-mechanized operations. Manual operation is inefficient and carries significant safety risks, potentially causing injury to personnel. While simpler, more mechanically assisted methods can improve safety and reduce injury risks, they still require substantial manual labor for positioning, alignment, bolt installation and removal. This results in low automation, unstable opening and closing processes, and a tendency to cause formwork deformation or damage to concrete edges. Furthermore, these methods are highly dependent on the experience of the operators, making it difficult to guarantee consistent quality. Moreover, during the production of precast box girders, dimensional deviations can easily occur that are not readily apparent, leading to defects in the final product. Summary of the Invention

[0004] The purpose of this invention is to provide an automatic opening and closing system for hydraulic side molds of precast box girders, in order to solve the problems encountered in the background art.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] The precast box girder hydraulic side formwork automatic opening and closing system includes:

[0007] A data acquisition module, which is used to acquire relevant data information during the precast box girder process;

[0008] The control center includes a processing module, an analysis module, and an interaction module. The processing module is used to preprocess the acquired related data information. The analysis module analyzes the processed data to determine whether the box girder size is within the set size. The interaction module is used to implement human-computer interaction.

[0009] The hydraulic actuator module is used to perform corresponding operations according to the operation instructions of the interaction module, and to adjust the displacement of the hydraulic cylinder according to the analysis results of the analysis module, thereby fine-tuning the dimensions of the box girder.

[0010] Furthermore, the associated data information includes thickness information, pressure information, and strain information, wherein the thickness information is obtained through an installed laser thickness gauge, the pressure information is obtained through an installed hydraulic pressure sensor, and the strain information is obtained through an installed strain sensor.

[0011] Furthermore, the analysis module operates as follows:

[0012] Based on the production stages of the precast box girder, multiple processing time periods are set, and each processing time period has a corresponding standard hydraulic cylinder pressure value. and standard thickness value Obtain the pressure value of the monitoring area after normalization. Thickness value and strain value Through formula Calculate the offset ;

[0013] The obtained offset The reasonable offset threshold range set for this processing time period Compare:

[0014] when If so, then the dimensions of the box girder are considered normal.

[0015] Otherwise, the box girder dimensions are determined to be abnormal, and a control command is generated to adjust the displacement of the hydraulic cylinder.

[0016] in, , , For their respective influence weighting coefficients, .

[0017] Furthermore, the control commands include hydraulic cylinder retraction commands and hydraulic cylinder extension commands:

[0018] when At that time, a hydraulic cylinder retraction command is generated. At that time, a command to extend the hydraulic cylinder is generated.

[0019] Furthermore, the hydraulic actuator module operates as follows:

[0020] When the interactive module generates an operation command, the hydraulic execution module drives the corresponding mechanical equipment to perform the corresponding operation, so that the parameters of each mechanical equipment are adjusted to be consistent with the command of the interactive module.

[0021] When the analysis module generates a hydraulic cylinder retraction command, it drives the hydraulic cylinder to retract. At a distance specified, when the analysis module generates a command to extend the hydraulic cylinder, the hydraulic cylinder is driven to extend. A distance.

[0022] Furthermore, the working method of the analysis module also includes:

[0023] exist A monitoring period is set, and N offset measurements are collected within that period to determine the offset variation curve function over time. And put it in the XY coordinate system, where the X-axis is time and the Y-axis is the offset;

[0024] The area above the X-axis is denoted as The area below the X-axis is denoted as :

[0025] when At that time, no fine-tuning is performed. At that time, the hydraulic cylinder will retract. At that time, the hydraulic cylinder will extend.

[0026] Furthermore, when At this time, the hydraulic cylinder is retracted by a distance B. At this time, the hydraulic cylinder extends a distance B; where , To measure the offset acquired for the i-th time within the monitoring period, and .

[0027] The beneficial effects of this invention are as follows: It can accurately analyze various parameters obtained by sensors to determine whether there are dimensional anomalies in the precast box girder during the generation process, thereby making timely adjustments and intelligently correcting deviations to improve the dimensional accuracy of the box girder; at the same time, it can also analyze the cumulative offset within a period when the precast box girder dimensions are normal to judge the risk of impending dimensional anomalies in the precast box girder, thereby making timely fine adjustments and corrections to avoid the occurrence of subsequent anomalies, and thus further ensuring the dimensional accuracy of the box girder. Attached Figure Description

[0028] Figure 1 This is a block diagram of the system of the present invention. Detailed Implementation

[0029] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0030] In one embodiment, an automatic opening and closing system for the hydraulic side formwork of a precast box girder is disclosed. Taking the detection of web dimensions during the precast box girder production process as an example, as... Figure 1 As shown, the opening and closing system includes:

[0031] The data acquisition module is used to acquire relevant data information during the precast box girder process. The relevant data information includes thickness information, pressure information and strain information. The thickness information is acquired by an installed laser thickness gauge, the pressure information is acquired by an installed hydraulic pressure sensor, and the strain information is acquired by an installed strain sensor.

[0032] The control center includes a processing module, an analysis module, and an interaction module. The processing module is used to preprocess the acquired related data information, the analysis module analyzes the processed data to determine whether the box girder size is within the set size, and the interaction module is used to implement human-computer interaction.

[0033] The hydraulic actuator module performs corresponding operations based on the operation instructions of the interactive module, and adjusts the displacement of the hydraulic cylinder based on the analysis results of the analysis module, thereby fine-tuning the dimensions of the box girder.

[0034] Through the above scheme, this application first acquires relevant data information during the precast box girder process using a data acquisition module, such as web thickness, hydraulic cylinder pressure, and side plate strain values. For example, the thickness value is acquired using a laser thickness gauge installed inside the side formwork panel, with three measuring points (bottom, middle, and top) arranged along the web height direction to collect the actual web thickness in real time. Pressure values ​​are acquired using a hydraulic pressure sensor to collect the real-time pressure of the opening and closing cylinders, reflecting the strength of the concrete side pressure on the panel. Strain values ​​are acquired using a strain sensor attached to the back of the side formwork panel, corresponding to the measuring points of the laser thickness gauge, to collect the real-time strain values ​​of the panel. These data are then uploaded to the control center. The processing module within the control center preprocesses this data, including data cleaning and normalization, to obtain clearer, more accurate, and dimensionless data for subsequent processing. Continuing the analysis, the analysis module then analyzes the processed data to determine if the box girder dimensions are within the set range. If the box girder dimensions are inconsistent, the displacement of the hydraulic cylinder in the hydraulic execution module is controlled to fine-tune the box girder dimensions, thereby ensuring the correct dimensions. Similarly, the interaction module is used for human-machine interaction. Operators can set corresponding parameters according to the box girder production steps to control the corresponding mechanical equipment. For example, the interaction module provides operation buttons such as one-click mold opening and one-click mold closing. When the operator clicks the "one-click mold closing" button, the control center receives the instruction, first checks the status of each limit switch, and after confirming that there are no obstacles, controls the hydraulic execution module to start the hydraulic pump station, and then controls the solenoid valve to energize in the mold closing direction to automatically close the mold. This can improve installation and dismantling time, reduce safety accidents, and significantly improve the automation level and construction efficiency of precast beam production.

[0035] The analysis module works as follows: based on the production stages of the precast box girder, multiple processing time periods are set, and each processing time period has a corresponding standard hydraulic cylinder pressure value. and standard thickness value Obtain the pressure value of the monitoring area after normalization. Thickness value and strain value Through formula Calculate the offset ;

[0036] The obtained offset The reasonable offset threshold range set for this processing time period Compare:

[0037] when If so, then the dimensions of the box girder are considered normal.

[0038] Otherwise, the box girder dimensions are determined to be abnormal, and a control command is generated to adjust the displacement of the hydraulic cylinder.

[0039] in, , , For their respective influence weighting coefficients, ;

[0040] The control commands include hydraulic cylinder retraction commands and hydraulic cylinder extension commands: when At that time, a hydraulic cylinder retraction command is generated. At that time, a command to extend the hydraulic cylinder is generated;

[0041] When the analysis module generates a hydraulic cylinder retraction command, it drives the hydraulic cylinder to retract. At a distance specified, when the analysis module generates a command to extend the hydraulic cylinder, the hydraulic cylinder is driven to extend. A distance.

[0042] The above embodiments provide a method for the analysis module to determine whether the hydraulic cylinder needs adjustment. First, based on the production stage of the precast box girder, multiple processing time periods are set, and each processing time period has a corresponding standard hydraulic cylinder pressure value. and standard thickness value Obtain the pressure value of the monitoring area after normalization. Thickness value and strain value Through formula Calculate the offset , , , The respective influence weighting coefficients are pre-calibrated using historical data and experiments. Generally, when the thickness value is higher than the standard thickness or the cylinder pressure value exceeds the preset pressure, the web thickness is thicker than the standard size; conversely, it indicates that the web thickness is thinner than the standard size. This indicates that the dimensions are abnormal and adjustments are needed. Therefore, the obtained offset is... The reasonable offset threshold range set for this processing time period Compare: When If the box girder dimensions are normal, it is determined that the box girder dimensions are abnormal. Control commands are then generated to adjust the displacement of the hydraulic cylinders. These control commands include hydraulic cylinder retraction commands and hydraulic cylinder extension commands. When a hydraulic cylinder retraction command is generated, the side mold panel needs to move outward (away from the inner mold) to reduce the actual distance between the side mold and the inner mold, ultimately allowing the concrete forming thickness to return to the design standard. Conversely, when... At that time, a command is generated to extend the hydraulic cylinder to bring the concrete thickness back to the design standard; therefore, when the analysis module generates a command to retract the hydraulic cylinder, the hydraulic cylinder is driven to retract. At a distance specified, when the analysis module generates a command to extend the hydraulic cylinder, the hydraulic cylinder is driven to extend. This method allows for precise analysis of various parameters obtained from sensors to determine whether dimensional anomalies occur during the precast box girder's production process, enabling timely adjustments and intelligent correction to improve the box girder's dimensional accuracy.

[0043] The working method of the analysis module also includes: A monitoring period is set, and N offset measurements are collected within that period to determine the offset variation curve function over time. And put it in the XY coordinate system, where the X-axis is time and the Y-axis is the offset;

[0044] The area above the X-axis is denoted as The area below the X-axis is denoted as :

[0045] when At that time, no fine-tuning is performed. At that time, the hydraulic cylinder will retract. At that time, the hydraulic cylinder extends;

[0046] when At this time, the hydraulic cylinder is retracted by a distance B. At this time, the hydraulic cylinder extends a distance B; where , To measure the offset acquired for the i-th time within the monitoring period, and .

[0047] The above scheme provides another method for the analysis module to work. When the dimensions of the precast box girder are determined to be normal, a monitoring cycle is set and N offset measurements are collected within that monitoring cycle, thereby determining the offset change curve function over time. And place it in an XY coordinate system, where the X-axis represents time and the Y-axis represents the offset, and obtain the area above the X-axis as . The area below the X-axis is denoted as :when When the change in size is very small, no fine-tuning is needed. At that time, the hydraulic cylinder will retract. At that time, the hydraulic cylinder extends. At this time, the hydraulic cylinder is retracted by a distance B. At this time, the hydraulic cylinder extends a distance B; where , To measure the offset acquired for the i-th time within the monitoring period, and ,formula This indicates the fluctuation of the offset over the entire monitoring period. The larger the value, the greater the fluctuation, and the more adjustments are needed. Using this method, even when the precast box girder dimensions are normal, the cumulative offset over the period can be analyzed to assess the risk of impending dimensional anomalies. This allows for timely fine-tuning and correction, preventing subsequent anomalies and further ensuring the dimensional accuracy of the box girder.

[0048] The system of this application can replace manual labor with machines. Through automatic control by the control center, it can automatically improve construction efficiency. The hydraulic execution module can provide stable side formwork support force according to the instructions of the control center, ensuring that the side formwork is tightly attached during concrete pouring, avoiding problems such as grout leakage and formwork bulging, and significantly improving installation and dismantling efficiency. At the same time, it can accurately analyze various parameters obtained by sensors to determine whether there are dimensional abnormalities in the precast box girder during the generation process, and make timely adjustments to intelligently correct deviations and improve the dimensional accuracy of the box girder. It can also analyze the cumulative offset within the period when the precast box girder is in normal size to judge the risk of dimensional abnormalities that are about to occur in the precast box girder, and make timely fine adjustments to correct them, avoiding the occurrence of subsequent abnormalities, thereby further ensuring the dimensional accuracy of the box girder.

[0049] The above description is merely an example and illustration of the concept of the present invention. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the concept of the invention or exceed the scope defined in the claims, they should all fall within the protection scope of the present invention.

Claims

1. An automatic opening and closing system for hydraulic side formwork of precast box girders, characterized in that, The system includes: A data acquisition module, which is used to acquire relevant data information during the precast box girder process; The control center includes a processing module, an analysis module, and an interaction module. The processing module is used to preprocess the acquired related data information. The analysis module analyzes the processed data to determine whether the box girder size is within the set size. The interaction module is used to implement human-computer interaction. The hydraulic actuator module is used to perform corresponding operations according to the operation instructions of the interaction module, and at the same time adjust the displacement of the hydraulic cylinder according to the analysis results of the analysis module, thereby fine-tuning the dimensions of the box girder. The analysis module works as follows: based on the production stages of the precast box girder, multiple processing time periods are set, and each processing time period has a corresponding standard hydraulic cylinder pressure value. and standard thickness value Obtain the pressure value of the monitoring area after normalization. Thickness value and strain value Through formula Calculate the offset ; The obtained offset The reasonable offset threshold range set for this processing time period Compare: when If so, it is determined that the box girder dimensions are normal. Otherwise, the box girder dimensions are determined to be abnormal, and a control command is generated to adjust the displacement of the hydraulic cylinder. in, , , For their respective influence weighting coefficients, ; The working method of the analysis module also includes: in A monitoring period is set, and N offset measurements are collected within that period to determine the offset variation curve function over time. And put it in the XY coordinate system, where the X-axis is time and the Y-axis is the offset; The area above the X-axis is denoted as The area below the X-axis is denoted as : when At that time, no fine-tuning is performed. At that time, the hydraulic cylinder will retract. At that time, the hydraulic cylinder extends; when At this time, the hydraulic cylinder is retracted by a distance B. At this time, the hydraulic cylinder extends a distance B; where To measure the offset acquired for the i-th time within the monitoring period, and .

2. The automatic opening and closing system for hydraulic side formwork of precast box girder according to claim 1, characterized in that, The associated data information includes thickness information, pressure information, and strain information. The thickness information is obtained through an installed laser thickness gauge, the pressure information is obtained through an installed hydraulic pressure sensor, and the strain information is obtained through an installed strain sensor.

3. The automatic opening and closing system for hydraulic side formwork of precast box girder according to claim 1, characterized in that, The control commands include hydraulic cylinder retraction commands and hydraulic cylinder extension commands: when At that time, a hydraulic cylinder retraction command is generated. At that time, a command to extend the hydraulic cylinder is generated.

4. The automatic opening and closing system for hydraulic side formwork of precast box girder according to claim 3, characterized in that, The hydraulic actuator module operates as follows: When the interactive module generates an operation command, the hydraulic execution module drives the corresponding mechanical equipment to perform the corresponding operation, so that the parameters of each mechanical equipment are adjusted to be consistent with the command of the interactive module. When the analysis module generates a hydraulic cylinder retraction command, it drives the hydraulic cylinder to retract. At a distance specified, when the analysis module generates a command to extend the hydraulic cylinder, the hydraulic cylinder is driven to extend. A distance.

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