A method for monitoring the pressure of the support legs of a three-point rotating body

Abstract

The present invention relates to the field of bridge engineering technology, and specifically to a three-point swivel support leg pressure monitoring method, which specifically includes equipment installation, data measurement, data analysis and swivel pressure monitoring, wherein at least three groups of normal monitoring components are selected and installed in a circular array between the support leg structure and the circular slideway, the bridge is rotated, and the pressure is monitored in real time by the monitoring components; the beneficial effects are: by starting the top support component to extend a specified distance and press against the bottom of the bridge, a group of pressure data is measured by the monitoring components at each position respectively, and the slideway is rotated and adjusted to repeatedly measure to obtain multiple groups of data, and then a three-dimensional coordinate model is established with the help of a central processing unit, so that abnormal data can be accurately judged, and then the faulty monitoring component can be inferred, and then the normal monitoring component can be selected for subsequent swivel pressure monitoring, which can not only ensure the safety of construction, but also accurately analyze the pressure condition of the support leg, the swivel posture, the load distribution and the like.

Description

Technical Field

[0001] The invention relates to the technical field of bridge engineering, and in particular to a method for monitoring the pressure of a three-point rotating support leg. Background Art

[0002] The rotating system of the rotating bridge consists of a lower turntable, an upper turntable, a ball joint, a slideway, and a traction system. The rotation process is generally achieved by using a jack to pull the traction cable to form a rotational force.

[0003] In the prior art, a support leg is installed at the bottom of the rotating bridge. The support leg is located on the upper surface of the annular slideway and is used to support the bridge body. By installing monitoring equipment between the support leg and the slideway, the pressure at various positions during the rotation of the bridge can be monitored in real time. The sum of the pressure values ​​measured by each monitoring device is the actual weight of the bridge body.

[0004] However, at present, when a single monitoring device fails, it is difficult to judge the accuracy of its measurement results because it cannot be compared with monitoring devices at other locations, which makes it difficult to accurately judge the weight, posture, load distribution and other conditions of the bridge in the future, which poses a great safety hazard during the rotation process. To this end, the present invention proposes a three-point rotation support leg pressure monitoring method to solve the above problem. Summary of the invention

[0005] The purpose of the present invention is to provide a three-point swivel leg support pressure monitoring method to solve the problem that it is difficult to make timely judgments when a single monitoring device fails as mentioned in the above background technology.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: A three-point swivel leg support pressure monitoring method, specifically comprising the following steps;

[0007] Step 1: Equipment installation: install the adjusting slideway on the outside of the annular slideway and concentric with it, install a top support assembly corresponding to a plurality of support leg structures on the upper surface of the adjusting slideway, and set a monitoring assembly between the top of the top support assembly and the bridge;

[0008] Step 2: Data measurement: During the weighing test, multiple top support components are started to extend a specified distance and press against the bottom of the bridge. The monitoring components at each position are measured to obtain a set of pressure data. Then, the slide is rotated to adjust the slide so that each set of monitoring components rotates to the position of the next set of monitoring components. The measurement steps are repeated until each set of monitoring components returns to the initial position.

[0009] Step 3: Data analysis: A three-dimensional coordinate model is established through the central processor, with the measurement point as the X-axis, the serial number of the monitoring component as the Y-axis, and the pressure value measured by the monitoring component as the Z-axis. The abnormal pressure values ​​at each point are removed, and the remaining pressure values ​​at each point are averaged;

[0010] Step 4: Rotation pressure monitoring: select at least three groups of normal monitoring components, install them in a circular array between the support structure and the circular slideway, rotate the bridge and monitor the pressure in real time through the monitoring components.

[0011] Preferably, in step one, a plurality of support structures are distributed in a circular array on the upper surface of the annular slide, a rotating ball joint is provided at the center of the annular slide, the rotating ball joint is installed on the surface of the ball joint pad, and a traction device is provided on the outer side of the annular slide, and the traction device pulls the bridge swivel through a steel wire rope.

[0012] Preferably, in step one, the monitoring component includes a stainless steel protective layer, a polytetrafluoroethylene protective layer and a sensor body, the sensor body is installed between the stainless steel protective layer and the polytetrafluoroethylene protective layer, and the three are kept relatively fixedly connected, countersunk screw holes are opened at the edges of the stainless steel protective layer and the polytetrafluoroethylene protective layer, and the monitoring component is kept fixedly connected to the surface of the support plate located at the top of the top support assembly through the countersunk bolts.

[0013] Preferably, in the step 2, the multiple groups of monitoring components are respectively recorded as ①, ③, ⑤..., the initial points of the multiple groups of monitoring components are respectively recorded as A, B, C..., the top support assembly is fixedly connected to the adjusting slide, the adjusting slide is driven by an external driving mechanism and rotates around the center of the annular slide, the top support assembly is a hydraulic cylinder, and at least two are arranged side by side as a group.

[0014] Preferably, in the step 2, the elongation of the top support assembly at each point is different, and the inclination of the bridge is preliminarily judged based on the shape and weight distribution of the bridge, and then the elongation of the top support assembly at each point is controlled, the elongation of the top support assembly at the point corresponding to the inclination direction of the bridge is greater than the elongation of the top support assembly at the point away from the inclination direction of the bridge, and the elongation of each group of top support assemblies at the same point is consistent.

[0015] Preferably, in step 2, each group of monitoring components is electrically connected to a data collector via wires. The data collector is installed on an adjusting slide and rotates along with the adjusting slide. The data collector has a built-in storage module, which is removed separately after data collection is completed and installed in a central processing unit for data analysis and processing.

[0016] Preferably, in step three, the measuring points are initial points of multiple groups of monitoring components, namely A, B, C, ..., and the pressure value data of each measuring point are recorded and compared.

[0017] Preferably, in step three, the pressure values ​​measured by each group of monitoring components at the same measuring point should be consistent. When the pressure value measured by a certain group of monitoring components at a certain measuring point is significantly different from the pressure values ​​measured by other groups of monitoring components at the same point, the measurement result of the certain group of monitoring components is judged to be an abnormal pressure value, that is, it is judged that the certain group of monitoring components has a fault.

[0018] Preferably, in step three, based on the fact that a certain group of monitoring components is a faulty sensor, the measurement pressure value results of this group of monitoring components at other measurement points are removed, and then the square difference of the remaining measurement pressure value results at each point is calculated to determine the degree of discreteness of the measurement results of the remaining monitoring components, thereby determining the accuracy of the measurement results of the remaining monitoring components.

[0019] Preferably, in step four, the number of monitoring components used for monitoring is selected according to actual needs, the load-bearing capacity of each monitoring component is preliminarily estimated, and then monitoring components with a suitable range are selected. During the rotation of the bridge, the angular velocity of the bridge is less than two degrees per minute, and the pressure value of the monitoring component is monitored in real time by the central processing unit. When the pressure value of the monitoring component changes abnormally, the rotation of the bridge is stopped immediately.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The present invention starts the top support assembly to extend a specified distance and press against the bottom of the bridge. The monitoring components at each position respectively measure and obtain a group of pressure data, and rotate the adjustment slide to repeat the measurement to obtain multiple groups of data. A three-dimensional coordinate model is then established with the help of a central processing unit. The abnormal data can be accurately determined, and the faulty monitoring component can be reversely inferred. The normal monitoring component can then be selected for subsequent rotation pressure monitoring. This can not only ensure the safety of the construction, but also accurately analyze the total weight of the bridge, rotation posture, load distribution and the like. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall process of the present invention;

[0023] Figure 2 This is a schematic diagram of the relative positions of the slideway and the annular slideway structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the position of the slideway structure after rotation according to the present invention;

[0025] Figure 4 This is a schematic diagram of the three-dimensional coordinates of the measurement points of the present invention;

[0026] Figure 5 It is a schematic diagram of the three-dimensional coordinates of the pressure value of the measurement result of the present invention.

[0027] In the figure: 1. Annular slide; 2. Support leg structure; 3. Adjustment slide; 4. Top support assembly; 5. Monitoring assembly; 6. Rotating ball joint; 7. Ball joint pad. DETAILED DESCRIPTION

[0028] In order to make the purpose and technical solution of the present invention clearly and completely described, and the advantages more clearly understood, the embodiments of the present invention are further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figures 1 to 5 , the present invention provides a technical solution:

[0030] Embodiment 1, a method for monitoring the pressure of a three-point rotating support leg, specifically comprises the following steps:

[0031] Step 1, equipment installation, install the adjustment slide 3 on the outside of the annular slide 1 and concentric with it, install a top support assembly 4 corresponding to multiple support structures 2 on the upper surface of the adjustment slide 3, the support structure 2 can slide on the surface of the annular slide 1 around the center of the annular slide 1, the support structure 2 is used to support the bridge body, and a monitoring assembly 5 is arranged between the top of the top support assembly 4 and the bridge. Multiple support structures 2 are distributed in a circular array on the upper surface of the annular slide 1 to ensure the stability of the bridge body and avoid tilting, while reducing the load-bearing size of each support structure 2. A rotating ball joint 6 is arranged at the center of the annular slide 1. The rotating ball joint 6 is installed on the surface of the ball joint pad 7. The rotating ball joint 6 is the center of rotation of the bridge body. A traction device is arranged on the outside of the annular slideway 1. The traction device pulls the bridge swivel through a steel wire rope. The traction device is driven by a hydraulic power device. The monitoring component 5 includes a stainless steel protective layer, a polytetrafluoroethylene protective layer and a sensor body. The sensor body is installed between the stainless steel protective layer and the polytetrafluoroethylene protective layer, and the three are kept relatively fixedly connected. Countersunk screw holes are opened at the edges of the stainless steel protective layer and the polytetrafluoroethylene protective layer. The monitoring component 5 is kept fixedly connected to the surface of the support plate located at the top of the top support component 4 through countersunk bolts.

[0032] Step 2: Data measurement: During the weighing test, multiple supporting components 4 are started to extend a specified distance and press against the bottom of the bridge. The monitoring components 5 at each position are measured to obtain a set of pressure data. Then, the slideway 3 is rotated and adjusted so that each group of monitoring components 5 rotates to the position of the next group of monitoring components 5. The measurement steps are repeated until each group of monitoring components 5 returns to the initial position.

[0033] Among them, the multiple groups of monitoring components 5 are respectively recorded as ①, ③, ⑤..., the initial positions of the multiple groups of monitoring components 5 are respectively recorded as A, B, C..., the top support component 4 is fixedly connected to the adjustment slide 3, the adjustment slide 3 is driven by an external driving mechanism and rotates around the center of the annular slide 1, the top support component 4 is a hydraulic cylinder, and at least two are arranged side by side as a group;

[0034] Secondly, the elongation of the top support assembly 4 at each point is different. Based on the shape and weight distribution of the bridge, the inclination of the bridge is preliminarily judged, and then the elongation of the top support assembly 4 at each point is controlled. The elongation of the top support assembly 4 at the point corresponding to the inclination direction of the bridge is greater than the elongation of the top support assembly 4 at the point away from the inclination direction of the bridge, and the elongation of each group of top support assemblies 4 at the same point is consistent;

[0035] Furthermore, each group of monitoring components 5 is electrically connected to a data collector through a wire. The data collector is installed on the adjustment slide 3 and rotates with the rotation of the adjustment slide 3. The data collector has a built-in storage module. After the data is collected, it is removed separately and installed in the central processing unit for data analysis and processing.

[0036] Step 3: Data analysis: A three-dimensional coordinate model is established through the central processor, with the measurement point as the X-axis, the serial number of the monitoring component 5 as the Y-axis, and the pressure value measured by the monitoring component 5 as the Z-axis. The abnormal pressure values ​​at each point are removed, and the remaining pressure values ​​at each point are averaged;

[0037] Furthermore, the measuring points are the initial points of the multiple groups of monitoring components 5, namely A, B, C, ..., and the pressure value data of each measuring point are recorded and compared;

[0038] It should be noted that the pressure values ​​measured by each group of monitoring components 5 at the same measuring point should be consistent. When the pressure value measured by a certain group of monitoring components 5 at a certain measuring point is significantly different from the pressure value measured by other groups of monitoring components 5 at the same point, the measurement result of the certain group of monitoring components 5 is judged to be an abnormal pressure value, that is, it is judged that the certain group of monitoring components 5 has a fault;

[0039] Therefore, based on the fact that a certain group of monitoring components 5 is a faulty sensor, the pressure value results of the monitoring components 5 at other measuring points are removed, and then the square difference of the remaining pressure value results of each point is calculated to determine the discreteness of the measurement results of the remaining monitoring components 5, thereby determining the accuracy of the measurement results of the remaining monitoring components 5;

[0040] Step 4: Rotation pressure monitoring: select at least three groups of normal monitoring components 5, install them in a circular array between the support structure 2 and the circular slideway 1, rotate the bridge and monitor the pressure in real time through the monitoring components 5;

[0041] Specifically, the number of monitoring components 5 used for monitoring is selected according to actual needs, the load-bearing size of each monitoring component 5 is preliminarily estimated, and then the monitoring components 5 of the appropriate range are selected. During the rotation of the bridge, the angular velocity of the bridge is less than two degrees per minute, and the central processing unit monitors the pressure value of the monitoring component 5 in real time. When the pressure value of the monitoring component 5 changes abnormally, the rotation of the bridge is stopped immediately to avoid danger.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-point swivel leg pressure monitoring method, characterized in that: Specifically include the following steps: Step 1: Equipment installation: installing the adjusting slideway (3) on the outside of the annular slideway (1) and concentric therewith, installing a top support assembly (4) corresponding to the plurality of support leg structures (2) on the upper surface of the adjusting slideway (3), and providing a monitoring assembly (5) between the top of the top support assembly (4) and the bridge; Step 2: Data measurement: During the weighing test phase, multiple supporting components (4) are started to extend a specified distance and press against the bottom of the bridge. The monitoring components (5) at each position are measured to obtain a set of pressure data. Then, the slideway (3) is rotated to adjust the position of each monitoring component (5) so that each monitoring component (5) rotates to the position of the next monitoring component (5). The measurement steps are repeated until each monitoring component (5) returns to the initial position. Step 3: Data analysis: A three-dimensional coordinate model is established through a central processing unit, with the measurement point as the X-axis, the serial number of the monitoring component (5) as the Y-axis, and the pressure value measured by the monitoring component (5) as the Z-axis. The abnormal pressure value at each point is removed, and the remaining pressure values ​​at each point are averaged; Step 4: Rotation pressure monitoring: select at least three groups of normal monitoring components (5), install them in a circular array between the support structure (2) and the circular slideway (1), rotate the bridge and monitor the pressure in real time through the monitoring components (5).

2. The three-point swivel leg support pressure monitoring method according to claim 1, characterized in that: In the step 1, a plurality of support structures (2) are distributed in a circular array on the upper surface of the annular slide (1), a rotating ball joint (6) is provided at the center of the annular slide (1), and the rotating ball joint (6) is installed on the surface of a ball joint pad (7). A traction device is provided on the outer side of the annular slide (1), and the traction device pulls the bridge swivel through a steel wire rope.

3. The three-point swivel leg pressure monitoring method according to claim 1, characterized in that: In step 1, the monitoring component (5) comprises a stainless steel protective layer, a polytetrafluoroethylene protective layer and a sensor body, the sensor body being installed between the stainless steel protective layer and the polytetrafluoroethylene protective layer, and the three are kept relatively fixedly connected, countersunk screw holes are provided at the edges of the stainless steel protective layer and the polytetrafluoroethylene protective layer, and the monitoring component (5) is kept fixedly connected to the surface of the support plate located at the top of the top support component (4) via the countersunk bolts.

4. The three-point swivel leg support pressure monitoring method according to claim 1, characterized in that: In the step 2, the plurality of monitoring components (5) are respectively denoted as ①, ③, ⑤, ..., the initial positions of the plurality of monitoring components (5) are respectively denoted as A, B, C, ..., the supporting component (4) is fixedly connected to the adjusting slideway (3), the adjusting slideway (3) is driven by an external driving mechanism and rotates around the center of the annular slideway (1), the supporting component (4) is a hydraulic cylinder, and at least two supporting components (4) are arranged side by side as a group.

5. The three-point swivel leg pressure monitoring method according to claim 4, characterized in that: In the second step, the elongation of the top support assembly (4) at each point is different. Based on the shape and weight distribution of the bridge, the inclination of the bridge is preliminarily judged, and then the elongation of the top support assembly (4) at each point is controlled. The elongation of the top support assembly (4) at the point corresponding to the inclination direction of the bridge is greater than the elongation of the top support assembly (4) at the point away from the inclination direction of the bridge, and the elongation of each group of top support assemblies (4) at the same point is consistent.

6. The three-point swivel leg support pressure monitoring method according to claim 1, characterized in that: In step 2, each group of monitoring components (5) is electrically connected to a data collector via a wire. The data collector is mounted on the adjustment slide (3) and rotates along with the rotation of the adjustment slide (3). The data collector has a built-in storage module, which is removed separately after data collection is completed and installed in a central processing unit for data analysis and processing.

7. The three-point swivel leg support pressure monitoring method according to claim 4, characterized in that: In the step three, the measuring points are the initial points of the multiple groups of monitoring components (5), namely A, B, C, ..., and the pressure value data of each measuring point are recorded and compared.

8. The three-point swivel leg support pressure monitoring method according to claim 1, characterized in that: In the step three, the pressure values ​​measured by each group of monitoring components (5) at the same measuring point should be consistent. When the pressure value measured by a certain group of monitoring components (5) at a certain measuring point is significantly different from the pressure values ​​measured by other groups of monitoring components (5) at the same measuring point, the measurement result of the certain group of monitoring components (5) is judged to be an abnormal pressure value, that is, it is judged that the certain group of monitoring components (5) has a fault.

9. The three-point swivel leg support pressure monitoring method according to claim 8, characterized in that: In the step three, based on the fact that a certain group of monitoring components (5) is a faulty sensor, the pressure value results measured by the group of monitoring components (5) at other measuring points are removed, and then the square difference of the remaining pressure value results at each point is calculated to determine the degree of discreteness of the measurement results of the remaining monitoring components (5), thereby determining the accuracy of the measurement results of the remaining monitoring components (5).

10. The method for monitoring the pressure of the three-point swivel support leg according to claim 7, characterized in that: In the step 4, the number of monitoring components (5) used for monitoring is selected according to actual needs, the bearing capacity of each monitoring component (5) is preliminarily estimated, and then a monitoring component (5) of a suitable range is selected. During the rotation of the bridge, the angular velocity of the bridge rotation is less than two degrees per minute, and the central processing unit monitors the pressure value of the monitoring component (5) in real time. When the pressure value of the monitoring component (5) changes abnormally, the rotation of the bridge is stopped immediately.

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