Bridge precision swivel construction method based on active control system

Abstract

The invention discloses a bridge precise swivel construction method based on an active control system, and the method comprises the steps: guiding a rotating disc to rotate through the active control system, and enabling the additionally installed active control system to transmit an instruction to a driver according to the relation between an angle measured by an angular instrument and a target angle in a swivel construction process, after receiving the instruction, the driver adjusts the rotating speed of the engine and actively increases or decreases the traction force, so that the rotating speed of the rotating body is controlled within a proper allowable range. If the rotation angle exceeds the limit in the rotation process, a feedback mechanism of the control system can be used for controlling the engine to rotate reversely, it is ensured that the error between the actual rotation angle and the preset target angle is controlled within the allowable range, and therefore precise control over bridge rotation construction is achieved. According to the device, the controllability and safety of swivel construction are remarkably improved, meanwhile, the defect of one-way traction is overcome, and high construction friendliness is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of bridge rotation construction, and in particular to a precise bridge rotation construction method based on an active control system. Background Art

[0002] With the rapid development of my country, the railway and highway networks have gradually taken shape, so there are more and more bridges crossing existing lines. The design and construction methods of bridges crossing existing lines have received extensive attention from domestic experts. Among the construction methods of bridges crossing existing lines, the rotation construction method has the following advantages: (1) less machinery and equipment required for construction, simple process, and safe operation; (2) reasonable structure, clear force, and good mechanical properties; (3) the rotation method can better overcome the difficulties of erecting structures in high mountain canyons, deep rapids or large-span rivers, especially for the construction of urban overpasses and railway overpasses in busy traffic areas, its advantages are more obvious; (4) it has the advantages of fast construction speed, low cost, and investment saving, and is widely used in bridge construction.

[0003] As a special construction method, rotation construction has its own particularity in the construction process. The core of the rotation construction method is the rotation equipment and rotation capacity. Ensuring the stability of the structure and the smooth conversion of the system during the rotation construction process is the standard of success. Most of the existing bridge rotation construction devices have the characteristics of flexible rotation, safety and stability, but the controllability during the construction process is not high. Especially during the rotation process, due to the inability to adjust the engine's rotation force in real time, it is difficult for the upper structure to rotate at a relatively uniform speed, affecting the construction safety and controllability. In addition, since the existing bridge rotation construction device is subject to one-way traction, when the turntable is over-rotated, the equipment needs to be manually adjusted, which reduces the construction efficiency. Summary of the invention

[0004] An important purpose of the present invention is to solve the problem of precise control in bridge rotation construction, and to provide a precise bridge rotation construction method based on an active control system. Specifically, it is a practical method of setting a goniometer on the upper turntable, using the measured angle data, and using an active control system to accurately control the turntable rotation angle and speed, especially the setting of the gear track and steel ruler on the turntable, which can conveniently and quickly realize the over-rotation adjustment of the turntable. The device can be well applied to the rotation construction of medium and large bridge structures.

[0005] To achieve the above purpose, the specific technical solution of the present invention is as follows:

[0006] A bridge precise rotation construction method based on an active control system comprises the following steps:

[0007] S1. Equipment installation: A turntable matching the upper ball joint is set under the rotating bridge, a gear track is set on the outer edge of the turntable, and steel rulers are installed on both sides of the gear track to drive the turntable to rotate, so that the steel rulers are fully in contact with the gear tracks on the turntable to enhance the bite force, and the steel rulers are driven by the engine to move, thereby driving the turntable to rotate;

[0008] S2. A goniometer is fixedly installed at the outer edge of the turntable, and the goniometer transmits the measured rotation angle data of the turntable to the active control system in real time;

[0009] S3, the active control system receives the angle data fed back by the goniometer, and controls the engine speed to make real-time adjustments according to the positive and negative difference between the preset target angle and the measured angle data, thereby controlling the rotation speed of the turntable:

[0010] S4. Obtain the positive and negative difference between the preset target angle of the active control system and the measured rotation angle data, and compare it with the set error threshold. When the positive and negative difference value is lower than the error threshold, stop the engine rotation and complete the bridge rotation construction to ensure that the error between the actual rotation angle of the turntable and the preset target angle is controlled within the allowable threshold range, thereby realizing the precise rotation construction of the bridge structure.

[0011] In the technical solution of the present utility model, the engine adjustment steps in step S3 are as follows:

[0012] S3.1, when the difference between the two is positive, that is, the measured rotation angle data is less than the preset target angle, and the difference between the two is greater than the set first threshold, the engine speed is controlled to increase until the difference is lower than the first threshold, the engine stops accelerating and continues to run at the current speed;

[0013] S3.2. When the difference between the two is a negative value, that is, the measured rotation angle data is greater than the preset target angle, the rotation direction of the engine is adjusted to make the turntable rotate in the opposite direction, and the engine speed is controlled according to the difference value.

[0014] Furthermore, when the measured turning angle data approaches a preset target angle, the active control system controls the engine to reduce the speed so as to reduce the rotation speed of the turntable and ensure that the turntable is precisely positioned.

[0015] Furthermore, when the measured angle data exceeds the preset target angle, the active control system adjusts the engine to rotate in the opposite direction, and the goniometer synchronously monitors the angle data of the turntable. When the measured angle data approaches the preset target angle, the active control system controls the engine to reduce the speed.

[0016] Furthermore, the measured turning angle data being close to the preset target angle means that the difference between the two is lower than a second threshold value preset by the system.

[0017] Furthermore, three goniometers are provided and fixed at three different positions of the turntable respectively. The goniometers respectively test the rotation angle of the turntable, feed back to the active control system, and take the average value of the test results as the measured rotation angle data of the turntable.

[0018] Furthermore, the active control system is composed of a speed control box, a driver, an operation indication panel, a rotation angle display panel, a direct current and a protection switch.

[0019] Furthermore, in step S1, the installation of the upper and lower ball joints, the pin shaft and the turntable is first completed, and engine oil or butter is applied to the upper ball joint, the lower bottom surface, the upper top surface of the lower ball joint and the pin shaft surface of the swivel device for protection, and the remaining surfaces are sandblasted and anti-corrosion painted.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0021] The basic control principle of the active control system of the present invention is: the goniometer transmits the measured angle of the rotating body to the active control system to realize real-time monitoring of the rotating body angle. At the same time, the active control system compares the difference between the rotating body rotation angle and the preset target angle with the first threshold value and the second threshold value, and actively adjusts the traction force through the engine according to the comparison result, so as to ensure that the speed control system accurately and efficiently adjusts the rotating speed of the rotating body.

[0022] The core of the rotation construction method of the present invention is to use an active control system to actively control the rotation speed of the engine according to the monitoring data fed back by the goniometer in real time, thereby achieving precise control of the rotation angle of the turntable and improving the maneuverability of the bridge rotation construction process.

[0023] The technical advantage is that without changing the technical principles and methods of rotation construction, the rotation angle of the turntable is controlled in real time by installing a goniometer on the turntable, and then the engine speed is adjusted according to the preset target angle using the angle data fed back by the goniometer. When the monitored angle data is closer to the target angle, the computer issues a command to gradually reduce the engine speed, thereby realizing the rotation construction of the bridge. In addition, when the turntable over-rotates, the computer issues a command to adjust the engine rotation direction based on the angle excess data, thereby realizing precise control of the rotation construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a basic flow chart of bridge rotation construction control based on the active control system of the present invention;

[0025] Figure 2 It is a basic control principle block diagram of the active control system of the present invention;

[0026] Figure 3It is a schematic plan view of the bridge rotation construction device of the present invention;

[0027] Figure 4 It is a detailed structural diagram of the turntable in the bridge rotation construction device of the present invention.

[0028] Figure numerals: 1-upper ball joint, 2-lower ball joint, 3-pin shaft, 4-upper turntable, 5-angiometer, 6-gear track, 7-steel rack, 8-engine, 9-speed control box. DETAILED DESCRIPTION

[0029] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0030] like Figure 1 As shown in the basic flow chart of bridge rotation construction control, a precise bridge rotation construction method based on an active control system includes the following steps:

[0031] S1. Equipment installation:

[0032] S1.1, Hardware installation: First, complete the installation of the upper and lower ball joints, pins and turntables, and apply engine oil or butter to the upper ball joint, lower bottom surface, upper top surface of the lower ball joint and pin surface of the swivel device for protection, and perform sandblasting and anti-corrosion coating on the remaining surfaces;

[0033] A gear track is installed on the outer edge of the turntable, and steel rulers are installed on both sides of the gear track to drive the turntable to rotate, so that the steel rulers are fully in contact with the gear track on the turntable to enhance the bite force. The steel rulers are driven by the engine to move, thereby driving the turntable to rotate;

[0034] A goniometer is fixedly installed at the outer edge of the turntable; three goniometers are provided and are respectively fixed at three different positions of the turntable;

[0035] S1.2. Establish an active control system:

[0036] The active control system is composed of a speed control box, a driver, an operation indication panel, a rotation angle display panel, a direct current and a protection switch.

[0037] S2, the goniometer tests the rotation angle of the turntable respectively, feeds back to the active control system, and takes the average value of the test results as the measured rotation angle data of the turntable;

[0038] S3, the speed control box of the active control system receives the angle data fed back by the goniometer, and controls the engine speed through the driver to make real-time adjustments according to the positive and negative difference between the preset target angle and the measured angle data, thereby controlling the rotation speed of the turntable:

[0039] S3.1, when the difference between the two is positive, that is, the measured rotation angle data is less than the preset target angle, and the difference between the two is greater than the set first threshold, the engine speed is controlled to increase until the difference is lower than the first threshold, the engine stops accelerating and continues to run at the current speed;

[0040] S3.2, when the difference between the two is a negative value, that is, the measured rotation angle data is greater than the preset target angle, the rotation direction of the engine is adjusted to make the turntable rotate in the opposite direction, and the engine speed is controlled according to the difference value;

[0041] S3.3. When the measured turning angle data is close to the preset target angle, that is, when the difference between the two is lower than the second threshold value preset by the system, the active control system controls the engine to reduce the speed to reduce the rotation speed of the turntable to ensure that the turntable is accurately positioned.

[0042] S4. Obtain the positive and negative difference between the preset target angle of the active control system and the measured rotation angle data, and compare it with the set error threshold. When the positive and negative difference value is lower than the error threshold, stop the engine rotation and complete the bridge rotation construction to ensure that the error between the actual rotation angle of the turntable and the preset target angle is controlled within the allowable threshold range, thereby realizing the precise rotation construction of the bridge structure.

[0043] In the above-mentioned active control system for rotation construction, the core of the active control system for rotation construction includes a speed control box, a driver, and an engine. Its basic control principle is: the goniometer transmits the actual measured angle of the rotation to the active control system to achieve real-time monitoring of the rotation angle. At the same time, the active control system compares the difference between the rotation angle of the rotation body and the preset target angle with the first threshold and the second threshold. According to the comparison result, the traction force is actively adjusted through the engine to ensure that the speed control system accurately and efficiently adjusts the rotation speed of the rotation body. The basic control principle block diagram of the active control system is shown in the figure below. Figure 2 shown.

[0044] The specific control process is as follows:

[0045] (1) During the rotation construction process, the goniometer transmits the monitored implementation angle data to the speed control box at a certain time interval. The control software in the speed control box compares the measured angle data with the set target angle, and then issues a speed adjustment command to the driver. After receiving the speed adjustment command, the driver controls the engine speed.

[0046] (2) The engine is a device that provides traction for bridge rotation construction. The engine is an actuator that can increase or decrease traction according to instructions to control the rotation speed error of the rotation within the allowable range.

[0047] (3) The speed control system is an active control system, which consists of a speed control box, a driver, an operation indicator panel, a rotation angle display panel, a DC current and a protection switch. The speed control system is the "nerve center" of the entire control system.

[0048] (3.1) After receiving the measured angle transmitted by the goniometer, the speed control box compares the measured angle with the set target angle. When the measured angle is less than the preset target angle and the difference between the two is greater than the set first threshold, the speed control box sends an acceleration command to the driver, and the engine speed increases until the difference between the two is less than the set first threshold, and the engine stops accelerating and continues to run at this speed;

[0049] When the operation continues until the difference between the actual measured angle and the preset target angle is lower than a preset second threshold, the active control system controls the engine to reduce the speed to reduce the rotation speed of the turntable to ensure that the turntable is accurately positioned;

[0050] When the operation continues until the difference between the two is lower than the error threshold, the engine is stopped and the bridge rotation construction is completed to ensure that the error between the actual rotation angle of the turntable and the preset target angle is controlled within the allowable threshold range.

[0051] (3.2) On the contrary, when the measured angle is greater than the preset target angle, that is, when the turntable rotation angle exceeds the preset target angle, adjust the rotation direction of the engine to make the turntable rotate in the opposite direction, and control the engine speed according to the difference value:

[0052] When the difference between the actual measured angle and the preset target angle is lower than a preset second threshold, the active control system controls the engine to reduce the speed and continue to run at a lower rotation speed;

[0053] When the operation continues until the difference between the two is lower than the error threshold, the engine is stopped and the bridge rotation construction is completed to ensure that the error between the actual rotation angle of the turntable and the preset target angle is controlled within the allowable threshold range.

[0054] The technical advantage of this application is that, without changing the technical principles and construction methods of rotation construction, a goniometer is installed on the turntable to monitor the rotation angle of the turntable in real time. Then, the speed control box uses the angle data fed back by the goniometer to adjust the engine speed according to the pre-set target angle. When the monitored angle data is closer to the target angle, the speed control system box issues a command to gradually reduce the engine speed, thereby achieving efficient bridge rotation construction. In addition, when the turntable over-rotates, the speed control box issues a command to adjust the engine rotation direction according to the angle excess data, thereby achieving precise control of the rotation construction.

[0055] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the specification and the embodiments. They can be applied to multiple fields to which the present invention is applicable. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A bridge precision rotation construction method based on an active control system, characterized in that: The steps include: S1. Equipment installation: A turntable matching the upper ball joint is set under the rotating bridge, a gear track is set on the outer edge of the turntable, and steel rulers are installed on both sides of the gear track to drive the turntable to rotate, so that the steel rulers are fully in contact with the gear tracks on the turntable to enhance the bite force, and the steel rulers are driven by the engine to move, thereby driving the turntable to rotate; S2. A goniometer is fixedly installed at the outer edge of the turntable, and the goniometer transmits the measured rotation angle data of the turntable to the active control system in real time; S3, the active control system receives the angle data fed back by the goniometer, and controls the engine speed to make real-time adjustments according to the positive and negative difference between the preset target angle and the measured angle data, thereby controlling the rotation speed of the turntable: S4. Obtain the positive and negative difference between the preset target angle of the active control system and the measured rotation angle data, and compare it with the set error threshold. When the positive and negative difference value is lower than the error threshold, stop the engine rotation and complete the bridge rotation construction to ensure that the error between the actual rotation angle of the turntable and the preset target angle is controlled within the allowable threshold range, thereby realizing the precise rotation construction of the bridge structure.

2. According to claim 1, a bridge precise rotation construction method based on active control system is characterized in that: The engine adjustment steps in step S3 are as follows: S3.1, when the difference between the two is positive, that is, the measured rotation angle data is less than the preset target angle, and the difference between the two is greater than the set first threshold, the engine speed is controlled to increase until the difference is lower than the first threshold, the engine stops accelerating and continues to run at the current speed; S3.

2. When the difference between the two is a negative value, that is, the measured rotation angle data is greater than the preset target angle, the rotation direction of the engine is adjusted to make the turntable rotate in the opposite direction, and the engine speed is controlled according to the difference value.

3. The bridge precise rotation construction method based on active control system according to claim 2 is characterized in that: When the measured turning angle data approaches the preset target angle, the active control system controls the engine to reduce the speed to reduce the rotation speed of the turntable and ensure that the turntable is accurately positioned.

4. The bridge precise rotation construction method based on active control system according to claim 3 is characterized in that: When the measured rotation angle data exceeds the preset target angle, the active control system adjusts the engine to rotate in the opposite direction, and the goniometer synchronously monitors the rotation angle data of the turntable. When the measured rotation angle data approaches the preset target angle, the active control system controls the engine to reduce the speed.

5. A bridge precise rotation construction method based on an active control system according to claim 3 or 4, characterized in that: The fact that the measured turning angle data is close to the preset target angle means that the difference between the two is lower than a second threshold value preset by the system.

6. The bridge precise rotation construction method based on active control system according to claim 1 is characterized in that: There are three goniometers, which are respectively fixed at three different positions of the turntable. The goniometers respectively test the rotation angle of the turntable, feed back to the active control system, and take the average value of the test results as the actual measured rotation angle data of the turntable.

7. The bridge precise rotation construction method based on active control system according to claim 1 is characterized in that: The active control system is composed of a speed control box, a driver, an operation indication panel, a rotation angle display panel, a direct current and a protection switch.

8. The bridge precise rotation construction method based on active control system according to claim 1 is characterized in that: In step S1, the upper and lower ball joints, the pin shaft and the turntable are first installed, and engine oil or butter is applied to the upper ball joint, the lower bottom surface, the upper top surface of the lower ball joint and the pin shaft surface of the swivel device for protection, and the remaining surfaces are sandblasted and anti-corrosion painted.

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