Real-time monitoring and early warning system for inner diameter of large-diameter water delivery pipeline

Abstract

The invention discloses a real-time monitoring and early warning system for the inner diameter of a large-diameter water conveying pipeline, and relates to the technical field of pipeline inner diameter shape quantity monitoring. In order to solve the problems of insufficient measurement precision, inconvenience in field installation, incapability of synchronous online output and incapability of realizing a monitoring and early warning function in the existing measurement technology, the invention provides a monitoring and early warning device. The device specifically comprises a plurality of groups of pull rope type displacement sensors arranged on the inner wall of the metal water conveying pipeline, and each group of pull rope type displacement sensors are respectively arranged on an X axis, a Y axis and a 45-degree angle which take the circle center of the inner diameter of the metal water conveying pipeline as a midpoint. According to the monitoring and early warning system, the measuring distance of the pull rope type displacement sensor is shortened by adding an extended steel wire rope with an invariable interval, so that the absolute precision can be improved under the condition that the linearity is invariable, and multi-section and multi-dimension synchronous monitoring can be carried out on the metal water conveying pipeline through the monitoring and early warning system; and early warning is performed in real time when the outer wall of the pipeline is grouted.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline inner diameter shape and quantity monitoring, and in particular to a real-time monitoring and early warning system for the inner diameter of a large-diameter water delivery pipeline. Background Art

[0002] During the laying of water pipelines in the hydropower industry, pumped storage industry, water conservancy and water diversion industries, when grouting and filling the water pipelines, it is necessary to monitor in real time the degree of inner diameter deformation of the water pipelines due to overpressure after external grouting to avoid serious accidents such as pipeline deformation and leakage.

[0003] Since these water pipes usually have an inner diameter of four to five meters or even longer, large-scale displacement monitoring equipment is required. There are many methods for measuring large-scale displacement, but the accuracy is converted according to linearity. For large-diameter water pipes on site, with an inner diameter of 4 meters, 5 meters or even larger, the measurement accuracy is usually 0.1%. It is very costly to control the linearity at 0.02% at the field application level. 4 meters is 4000mm, and 0.02% accuracy means an accuracy deviation of +-0.8mm. For pipeline deformation, the measurement accuracy of existing pipeline inner diameter measuring equipment is seriously insufficient.

[0004] During the grouting process, the deformation monitoring requirement of the pipeline must be controlled within 0.1mm, and the measurement accuracy must reach 0.01mm (10um) or smaller. In addition, the inner diameter of three angles, X, Y and 45 degrees, must be measured simultaneously, and six sections need to be measured synchronously. The existing direct measurement technology cannot meet this measurement application requirement. The measurement accuracy is not enough, and it is not convenient to install on site, and it is not possible to output synchronously online and realize the monitoring and early warning function. Therefore, a real-time monitoring and early warning system for the inner diameter of large-diameter water pipelines is urgently needed to solve the problems existing in the existing technology. Summary of the invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a real-time monitoring and early warning system for the inner diameter of a large-diameter water pipeline.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] The real-time monitoring and early warning system for the inner diameter of a large-diameter water pipeline comprises a plurality of groups of draw-rope displacement sensors arranged on the inner wall of a metal water pipeline, each group of the draw-rope displacement sensors being respectively arranged at three angles, the X-axis, the Y-axis and the 45-degree angle, with the center of the inner diameter of the metal water pipeline as the midpoint; a wire opening is provided on the outer wall of the draw-rope displacement sensor, a measuring wire rope is slidably connected to the inner wall of the wire opening, an extension wire rope is integrally formed at one end of the measuring wire rope, a locking buckle is fixed at one end of the extension wire rope, and the locking buckle is arranged on the inner wall of the metal water pipeline.

[0008] Preferably, a first magnet block is fixed to the outer wall of the top of the locking buckle, and the first magnet block is adsorbed on the inner wall of the metal water pipe by magnetic force.

[0009] Further: the bottom outer wall of the pull-rope displacement sensor is fixed with a mounting plate, the bottom outer wall of the mounting plate is fixed with a plurality of second magnet blocks, and the second magnet blocks are adsorbed on the inner wall of the metal water pipe by magnetic force.

[0010] Further preferably, a separator is fixed to the outer wall of the measuring steel wire rope and the extension steel wire rope.

[0011] As a preferred embodiment of the present invention: the outer wall of the pull-wire type displacement sensor is provided with a signal interface, and the inner wall of the signal interface is plugged with a signal transmission connector.

[0012] As a further preferred embodiment of the present invention: the signal transmission connector is connected to a control cabinet via a signal transmission line, a warning light is fixed to an outer wall of the control cabinet, and the warning light is electrically connected to the control cabinet.

[0013] As a further solution of the present invention: the control cabinet is electrically connected to the grouting motor pump relay through a signal transmission line.

[0014] The beneficial effects of the present invention are:

[0015] 1. The measuring distance of the pull-rope displacement sensor can be shortened by adding an extended wire rope in a constant interval. This can improve the absolute accuracy while keeping the linearity constant. This monitoring and early warning system can synchronously monitor the multi-section and multi-dimensional aspects of the metal water pipeline and issue a real-time early warning when grouting the outer wall of the pipeline.

[0016] 2. Since the extension wire rope and the measuring wire rope are obtained by separating the same wire rope through a separator, the extension wire rope and the measuring wire rope of the integrated structure are fixed to the inner wall of the metal water pipe through a locking buckle, which can avoid the problem of inaccurate measurement results caused by sliding of the extension wire rope, the measuring wire rope and the locking buckle during measurement, thereby avoiding the measurement deviation introduced by the sliding of the measured object during the measurement process and improving the measurement accuracy of the pipe inner diameter deformation.

[0017] 3. Through the implementation of this technology, the deformation of the pipeline in the key process can be effectively controlled in real time, and the original grouting method based on experience and visual observation has been changed to automatic grouting and real-time early warning, thereby ensuring the grouting process is efficient and safe. The overall project progress has been accelerated and project costs have been saved.

[0018] 4. Since the on-site monitoring and measurement focuses more on the deformation of the metal water pipe, the monitoring and early warning system can be calibrated every time the pull-rope displacement sensor is installed in place to eliminate the measurement deviation introduced by the on-site installation position. Real-time monitoring can be based on calibrated data, making the monitoring data more intuitive and accurate. When there is too much pipe deformation deviation during the grouting process, the control cabinet will directly output an alarm signal and cut off the grouting motor pump, thereby ensuring the safety of the pipeline and construction personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the layout structure of the real-time monitoring and early warning system for the inner diameter of a large-diameter water pipeline proposed by the present invention;

[0020] Figure 2 This is a schematic diagram of the locking buckle structure of the real-time monitoring and early warning system for the inner diameter of a large-diameter water pipeline proposed by the present invention;

[0021] Figure 3 This is a schematic diagram of the structure of a pull-rope type displacement sensor of the real-time monitoring and early warning system for the inner diameter of a large-diameter water pipeline proposed by the present invention;

[0022] Figure 4 This is a schematic diagram of the circuit flow structure of the real-time monitoring and early warning system for the inner diameter of a large-diameter water pipeline proposed by the present invention.

[0023] In the figure: 1-pull rope displacement sensor, 2-extension wire rope, 3-signal transmission connector, 4-locking buckle, 5-metal water pipe, 6-first magnet block, 7-mounting plate, 8-second magnet block, 9-wire port, 10-separator, 11-measuring wire rope, 12-signal interface. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further described in detail below in conjunction with specific implementation methods.

[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected or set, or detachably connected or set, or integrally connected or set. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] Embodiment 1:

[0029] Real-time monitoring and early warning system for the inner diameter of large-diameter water pipelines, such as Figure 1-4 As shown, it includes multiple groups of draw-wire displacement sensors 1 arranged on the inner wall of the metal water pipe 5, each group of the draw-wire displacement sensors 1 is respectively arranged at three angles, X, Y axis and 45 degrees, with the center of the inner diameter of the metal water pipe 5 as the midpoint, and the outer wall of the draw-wire displacement sensor 1 is provided with a wire opening 9, and the inner wall of the wire opening 9 is slidably connected with a measuring wire rope 11, and one end of the measuring wire rope 11 is integrally formed with an extension wire rope 2, and one end of the extension wire rope 2 is fixed with a locking buckle 4, and the locking buckle 4 is arranged on the inner wall of the metal water pipe 5;

[0030] A first magnet block 6 is fixed to the outer wall of the top of the locking buckle 4, and the first magnet block 6 is adsorbed on the inner wall of the metal water pipe 5 by magnetic force;

[0031] The bottom outer wall of the pull-wire displacement sensor 1 is fixed with a mounting plate 7, and the bottom outer wall of the mounting plate 7 is fixed with a plurality of second magnet blocks 8, and the second magnet blocks 8 are adsorbed on the inner wall of the metal water pipe 5 by magnetic force;

[0032] The outer walls of the measuring steel wire rope 11 and the extension steel wire rope 2 are fixed with a separator 10;

[0033] The outer wall of the pull-wire displacement sensor 1 is provided with a signal interface 12, and the inner wall of the signal interface 12 is plugged with a signal transmission connector 3;

[0034] The signal transmission connector 3 is connected to a control cabinet via a signal transmission line, a warning light is fixed to the outer wall of the control cabinet, and the warning light is electrically connected to the control cabinet;

[0035] The control cabinet is electrically connected to the grouting motor pump relay via a signal transmission line.

[0036] In view of the monitoring needs of water pipelines in practical applications, the first problem that needs to be solved is the measurement accuracy of the inner diameter of the pipeline. Although the water pipeline being measured is usually of large diameter, the deformation range of the inner diameter of the pipeline is relatively fixed. Therefore, the measurement distance of the pull-rope displacement sensor 1 is shortened by adding an extended wire rope in a constant range. This can improve the absolute accuracy while keeping the linearity unchanged. This monitoring and early warning system can synchronously monitor the multi-section and multi-dimensional aspects of the metal water pipeline 5, and issue real-time early warnings when grouting the outer wall of the pipeline.

[0037] When it is necessary to deploy the monitoring and early warning system on the inner wall of the metal water pipe 5, firstly, the pull-wire displacement sensor 1 is attached to one of the three angles of the X-axis, Y-axis and 45-degree angle on the inner wall of the metal water pipe 5 through the second magnet block 8 at the bottom of the mounting plate 7, and then the locking buckle 4 at one end of the extension wire rope 2 is attached to the inner wall of the metal water pipe 5 opposite to the wire port 9 through the first magnet block 6, so that the extension wire rope 2 and the measuring wire rope 11 are integrally connected through the pull-wire displacement sensor 1 and the locking buckle 4 fixed on the inner wall of the metal water pipe 5. Straighten it, and then fix the remaining pull-wire displacement sensors 1 and locking buckles 4 at the other two angles inside the metal water pipe 5 according to the above steps, so as to complete the deployment of the real-time monitoring and early warning system for the inner diameter of the pipeline. At this time, the pull-wire displacement sensor 1 can be connected to the control cabinet set outside through the signal transmission line at one end of the signal transmission connector 3. At the same time, the multiple signal transmission lines inside the metal water pipe 5 can be supported by the corresponding wire management bracket to ensure that the signal monitored by the pull-wire displacement sensor 1 can be stably transmitted to the control cabinet through the signal transmission line;

[0038] The pull-wire displacement sensor 1 converts the linear displacement of the measured object into a rotation angle value, and then converts the rotation angle into a change in the electrical signal resistance value through a rotary potentiometer, and then converts the change into a voltage change through a power supply voltage divider, and then further amplifies the transmission processing to output a standard transmitter signal.

[0039] The monitoring and early warning system shortens the measuring range from 4 meters to 10 mm by adding an extension wire rope 2. The subsequent amplification circuit only needs to amplify the section from 3990 to 4000 mm to achieve high-precision 0.01 mm (10 um) measurement of the inner diameter deformation of the pipeline. Since the extension wire rope 2 and the measuring wire rope 11 are obtained by separating the same wire rope through a separator 10, the extension wire rope 2 and the measuring wire rope 11, which are an integrated structure, are fixed to the inner wall of the metal water pipe 5 by a locking buckle 4, which can avoid the problem of inaccurate measurement results caused by the sliding of the extension wire rope 2, the measuring wire rope 11 and the locking buckle 4 during measurement, thereby avoiding the measurement deviation introduced by the sliding of the object being measured during the measurement process, and improving the measurement accuracy of the inner diameter deformation of the pipeline.

[0040] Through the implementation of this technology, the deformation of the pipeline in the key process can be effectively controlled in real time, and the original grouting method based on experience and visual observation has been changed to automatic grouting and real-time early warning, thus ensuring the grouting process is efficient and safe. The overall project progress has been accelerated and project costs have been saved.

[0041] The extended wire rope 2 of the rope-type displacement sensor 1 is directly locked by snapping, avoiding the risk of deviation introduced by the sliding of the pull ring. In this embodiment, the extended wire rope 2 of up to 3.9 meters effectively shortens the direct measurement range of the rope-type displacement sensor 1, from 4000mm to 10mm. The linear error range of 0.02% full-scale accuracy allows the measurement to achieve a sensor measurement accuracy of 0.002mm.

[0042] Since the deformation of the metal water pipe 5 is of greater concern during on-site monitoring and measurement, the monitoring and early warning system can be calibrated each time the pull-rope displacement sensor 1 is installed in place to eliminate the measurement deviation introduced by the on-site installation position. Real-time monitoring can be based on calibrated data to make the monitoring data more intuitive and accurate. When there is an excessive amount of pipe deformation deviation during the grouting process, the control cabinet will directly output an alarm signal and cut off the grouting motor pump, thereby ensuring the safety of the pipeline and construction personnel. After troubleshooting, the grouting system can be started again, as well as the real-time monitoring and early warning system.

[0043] Working principle: When it is necessary to deploy the monitoring and early warning system on the inner wall of the metal water pipe 5, firstly, the draw-rope displacement sensor 1 is attached to one of the three angles of the X-axis, Y-axis and 45-degree angle on the inner wall of the metal water pipe 5 through the second magnet block 8 at the bottom of the mounting plate 7, and then the locking buckle 4 at one end of the extension wire rope 2 is attached to the inner wall of the metal water pipe 5 opposite to the wire port 9 through the first magnet block 6, so that the extension wire rope 2 and the measuring wire rope 11 are straightened as a whole through the draw-rope displacement sensor 1 and the locking buckle 4 fixed on the inner wall of the metal water pipe 5, and then the remaining draw-rope displacement sensors 1 and the locking buckle 4 are fixed at the other two angles inside the metal water pipe 5 according to the above steps, thereby completing the deployment of the real-time monitoring and early warning system for the inner diameter of the pipeline. At this time, the draw-rope displacement sensor 1 can be connected to the control cabinet arranged outside through the signal transmission line at one end of the signal transmission connector 3, and at the same time, the multiple signal transmission lines located inside the metal water pipe 5 can be supported by the corresponding wire management bracket.

[0044] This monitoring and early warning system shortens the measuring range from 4 meters to 10 mm by adding an extended wire rope 2. The subsequent amplification circuit only needs to amplify the section from 3990 to 4000 mm, and can achieve high-precision 0.01 mm (10 um) measurement of the inner diameter deformation of the pipeline;

[0045] Since the deformation of the metal water pipe 5 is of greater concern during on-site monitoring and measurement, the monitoring and early warning system can be calibrated each time the pull-rope displacement sensor 1 is installed in place to eliminate the measurement deviation introduced by the on-site installation position. Real-time monitoring can be performed based on the calibrated data, making the monitoring data more intuitive and accurate. When there is an excessive amount of pipe deformation deviation during the grouting process, the control cabinet will directly output an alarm signal and cut off the grouting motor pump, thereby ensuring the safety of the pipeline and construction personnel.

[0046] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A real-time monitoring and early warning system for the inner diameter of a large-diameter water pipeline, comprising a plurality of groups of pull-wire displacement sensors (1) arranged on the inner wall of a metal water pipeline (5), characterized in that: Each group of the pull-wire displacement sensors (1) is respectively arranged at three angles, namely, the X-axis, the Y-axis and the 45-degree angle, with the inner diameter center of the metal water pipe (5) as the midpoint. The outer wall of the pull-wire displacement sensor (1) is provided with a wire opening (9), and the inner wall of the wire opening (9) is slidably connected with a measuring steel wire rope (11). An extension steel wire rope (2) is integrally formed at one end of the measuring steel wire rope (11), and a locking buckle (4) is fixed at one end of the extension steel wire rope (2). The locking buckle (4) is arranged on the inner wall of the metal water pipe (5).

2. The large-diameter water pipeline inner diameter real-time monitoring and early warning system according to claim 1 is characterized in that: A first magnet block (6) is fixed to the outer wall of the top of the locking buckle (4), and the first magnet block (6) is adsorbed on the inner wall of the metal water pipe (5) by magnetic force.

3. The large-diameter water pipeline inner diameter real-time monitoring and early warning system according to claim 1 is characterized in that: The bottom outer wall of the pull-wire displacement sensor (1) is fixed with a mounting plate (7), and the bottom outer wall of the mounting plate (7) is fixed with a plurality of second magnet blocks (8), and the second magnet blocks (8) are adsorbed on the inner wall of the metal water pipe (5) by magnetic force.

4. The large-diameter water pipeline inner diameter real-time monitoring and early warning system according to claim 1 is characterized in that: A separator (10) is fixed to the outer walls of the measuring steel wire rope (11) and the extension steel wire rope (2).

5. The large-diameter water pipeline inner diameter real-time monitoring and early warning system according to claim 3 is characterized in that: The outer wall of the pull-wire type displacement sensor (1) is provided with a signal interface (12), and the inner wall of the signal interface (12) is plugged with a signal transmission connector (3).

6. The large-diameter water pipeline inner diameter real-time monitoring and early warning system according to claim 5 is characterized in that: The signal transmission connector (3) is connected to a control cabinet via a signal transmission line, a warning light is fixed to the outer wall of the control cabinet, and the warning light is electrically connected to the control cabinet.

7. The large-diameter water pipeline inner diameter real-time monitoring and early warning system according to claim 6 is characterized in that: The control cabinet is electrically connected to the grouting motor pump relay via a signal transmission line.

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