A protective automatic control device and method for end points and measuring points of dam tensioning lines

Abstract

The present invention discloses a protective automatic control device and method for the end point and measuring point of the dam tensioning line, the device includes: a direct drive protective plate, a follower protective plate, a thrust connecting rod and a control module, etc.; T-shaped edges are set on the upper and lower edges of the direct drive protective plate, and the bottom is connected with a compression spring to form a nested structure; a square wire hole is opened in the middle of the direct drive protective plate, and laser switch sensors are arranged around it. T-shaped guide rails are set at the bottom and side, and cooperate with the guide groove set at the end of the thrust connecting rod to realize transmission. During operation, the displacement of the dam body causes the tensioning line to trigger the laser switch, and the control module controls the linear motor to drive the direct drive protective plate to move, automatically avoiding the line body from touching the edge and maintaining the free state of the line body, and at the same time realizing the alarm work of the dam monitoring system under the limit displacement control logic. The present invention has high working stability, simple and clear control logic, and has good protection and monitoring effects on the tensioning line system.

Description

Technical Field

[0001] The invention belongs to the technical field of operation and maintenance of a dam safety monitoring system, and in particular relates to a protective automatic control device and method for end points and measuring points of a dam tensioning line. Background Art

[0002] The dam safety monitoring system is an important facility for monitoring the operating status of hydraulic structures and timely discovering potential safety hazards. As a component of the dam safety monitoring system, the tensioning line system is widely used in the deformation observation of the dam crest, corridor, dam slope and other parts of the linear dam. Its basic principle is to use the freely suspended projection straight line after horizontal tension at both ends as the reference line to measure the lateral displacement offset value of the dam measuring point. The deformation monitoring results of the tensioning line are usually used as one of the important bases for mastering the deformation law of the dam and evaluating the safety and stability of the project.

[0003] During the routine maintenance and inspection of the dam tensioning line system, it is necessary to focus on checking whether the line body is in a free and stable state, whether the range is sufficient, whether there is a jamming phenomenon, whether the protection facilities are intact, etc. The current specifications require that when the monitoring system cannot meet the dam safety monitoring requirements, the monitoring system should be modified. However, at the two ends and each measuring point of the tensioning line system, the protective pipe must have a certain diameter, and there are drainage holes, cable holes, and vents within the measuring line range, which will inevitably cause the tensioning line body to be affected by wind, rodents or other small animals, causing damage to system components and abnormal measurement values, which pose a serious threat to the normal operation of the tensioning line system. Since the protective pipe is mostly a slender polyvinyl chloride pipe or carbon steel pipe with a small radius and a large span, and is buried inside the concrete channel, it is difficult to carry out inspection and maintenance work; in addition, the measuring point components are compactly arranged, and the end of the protective pipe and the measuring point component is adjacent to the telemetering tensioning line instrument or floating device, and the spacing is small, which cannot meet the installation and operation of the existing protective equipment. Therefore, it is urgent to set reasonable protective devices at the ends and measuring points of the tensioning line.

[0004] At present, most of the measuring points and endpoints of the tensioning line system are not equipped with protective devices, or fixed steel wire meshes are used for protection. Without protective devices, the floating device, scale and tensioning line instrument in the tensioning line body and the measuring point device will be disturbed by small animals, which may cause the value of the measuring point to be disturbed and mutated, and the measured value is unreliable. In severe cases, the protective tube is damaged, the measuring line is damaged, or the tensioning line measuring point component device is damaged. When a fixed steel wire mesh is used for protection, the tensioning line body touches the steel wire mesh and is blocked due to the displacement of the measuring point or the object being measured. The line body is in a non-free state, which affects the range and range of the measuring point component, and the measured displacement value is distorted. The steel wire protection grid cannot be flexibly adjusted according to the actual displacement of the tensioning line body. If the aperture is too large, it cannot meet the protection requirements. If the space is too small, it is easy to cause the line body to touch and block, which cannot meet the actual measurement requirements. In addition, the steel wire protection grid cannot avoid the problem of touching the wire when it is manually adjusted, and after multiple adjustments, the wire mesh hole becomes larger, which does not meet the protection requirements. Therefore, it is necessary to design a reasonable protective device for the tensioning wire system in a limited space, so as to monitor the position of the tensioning wire in real time and alarm at the extreme position. The protective device automatically adjusts with the displacement of the wire to keep it in a free state at all times to avoid jamming. Summary of the invention

[0005] The purpose of the present invention is to make up for the defects in the protection of the end points and measuring points of the current tensioning line system, to realize the reasonable setting, automatic adjustment and alarm functions of the protection device without affecting the range of movement and range of the measuring point components, and to provide a protection automatic control device and method for the end points and measuring points of the dam tensioning line. The protection device has a delicate structure, is easy to install, has a clear control method logic, has high positioning accuracy, has strong applicability and versatility, and is economical.

[0006] The technical solution adopted by the present invention to solve the technical problem is:

[0007] A protective automatic control device for the end point and measuring point of a dam tension line, comprising a direct drive protective plate, a follower protective plate, a compression spring, a wire hole, a lower guide rail, a side guide rail, a guide groove, a linear motor, a thrust connecting rod, a laser switch sensor and a control module; wherein,

[0008] The follow-up protective plate is divided into an upper follow-up protective plate and a lower follow-up protective plate, which are double-layer thin box-shaped, closed on the left and right sides and the side of the direct-driven protective plate, and T-shaped edges are set on the upper and lower edges of the direct-driven protective plate, and shuttle between the upper follow-up protective plate and the lower follow-up protective plate; two compression springs are used to connect the bottom end faces of the upper follow-up protective plate and the lower follow-up protective plate at the bottom of the direct-driven protective plate to achieve the follow-up property of the upper follow-up protective plate and the lower follow-up protective plate; a square wire hole is opened in the middle of the direct-driven protective plate, and a laser switch sensor is arranged around the wire hole to detect whether the tensioning line measuring line is about to touch the edge in four directions; T-shaped guide rails, namely the lower guide rail and the side guide rail, are set at the bottom and side of the direct-driven protective plate, which cooperate with the guide groove set at the end of the thrust connecting rod to realize transmission; the linear motor is divided into a vertical linear motor and a horizontal linear motor, which are fixed at the bottom and side of the installation section respectively, and are used to drive the direct-driven protective plate to move; the output end of the laser switch sensor is connected to the input end of the control module, and the output end of the control module is connected to the control end of the linear motor.

[0009] A further improvement of the present invention is that the protective automatic control device is installed at the ends of the tensioning line protection tubes at the fixed end and the tensioning end of the tensioning line and between the protection tube sections of each tensioning line measuring point and the tensioning line instrument or floating device.

[0010] A further improvement of the present invention is that the length of the direct drive protection plate and the upper follower protection plate and the lower follower protection plate L≥2R, and the width of the direct drive protection plate d 1 = R, width d of upper and lower follower guard plates 2 Determine d by the vertical dimension of the tensioning line measuring point box 2 =D / 2-R / 2; where R is the diameter of the tensioning line protection tube, and D is the vertical dimension of the tensioning line measuring point box.

[0011] A further improvement of the present invention is that a wide U-shaped groove is provided in the middle of the upper plate of the upper follower guard plate and the lower follower guard plate, and a semi-U-shaped groove is provided on the right side for the lower guide rail and the side guide rail to pass through, so as to ensure the vertical travel of the direct-driven guard plate.

[0012] A further improvement of the present invention is that the travel length of the lower guide rail and the right guide rail located below and to the right of the direct drive protection plate is equal to the diameter of the tensioning wire protection tube, so that the wire hole area can be moved to cover the entire cross-section of the protection tube.

[0013] A further improvement of the present invention is that the wire hole in the middle of the direct-drive protective plate is arranged in a square with a side length of 20 to 30 mm, and a groove with a width of 3 mm is opened on the left side of the wire hole of the direct-drive protective plate to allow the tensioning wire to pass through when the device is installed, and a long hard plastic rubber strip of the same thickness as the direct-drive protective plate is used to fill the groove.

[0014] A further improvement of the present invention is that the effective stroke of the horizontal linear motor and the vertical linear motor is 2R.

[0015] A further improvement of the present invention is that the horizontal linear motor is arranged on the left or right side of the installation section, and the vertical linear motor is arranged in a concrete groove at the bottom of the installation section, and the depth of the concrete groove is 2R.

[0016] A further improvement of the present invention is that the laser switch sensors are installed in parallel and cross-arranged around the wire hole without interfering with each other. The light source of the laser switch should be equidistant from the wire hole around the wire hole, and the distance is greater than twice the diameter of the tensioning wire, which is 3 to 5 mm.

[0017] A working method of a protective automatic control device for a dam tension line end point and a measuring point, comprising the following steps:

[0018] Step 1) Use a vernier caliper to calibrate the position of the tensioning wire body on the end face of the tensioning wire protection tube, establish a rectangular coordinate system with the tensioning wire body as the coordinate origin, and calibrate the distance between the wire body and the right edge of the tensioning wire protection tube as X 1 , the distance from the left edge of the tensioning wire protection tube is X 2 , the distance from the upper edge of the tensioning wire protection tube is Y 1 , the distance from the lower edge of the tensioning wire protection tube is Y 2 ;

[0019] Step 2) Install and fix the protective device, move the direct drive protective plate, place the tensioning wire at the center of the middle measuring wire hole, and calibrate the initial coordinates of the tensioning wire body to (0, 0);

[0020] Step 3) Use a vernier caliper to calibrate the size Δ of the wire hole, measure the distance δ between the laser switch sensor light source and the periphery of the wire hole, and adjust the distance δ between the four laser switch sensor light beams and the periphery of the wire hole to be consistent;

[0021] Step 4) After the calibration is completed, the tensioning line is in a free moving state. As the deformation of the dam body occurs, the tensioning line triggers the laser switch sensor, and the laser switch sensor transmits the signal to the control module. The control module adopts the principle of "single trigger, linear drive" according to the triggering situation to control the operation of the linear motor, drive the direct drive protection plate to move, and place the tensioning line in the middle position of the triggering direction; when the tensioning line approaches the upper edge of the wire hole, the first laser switch sensor is triggered, and the control module controls the vertical linear motor to drive the direct drive protection plate to move upward Δ / 2-δ / 2; when the tensioning wire body approaches the lower edge of the wire hole, the second laser switch sensor is triggered, and the control module controls the vertical linear motor to directly drive the protective plate to move downward by Δ / 2-δ / 2; when the tensioning wire body approaches the left side of the wire hole, the third laser switch sensor is triggered, and the control module controls the horizontal linear motor to directly drive the protective plate to move to the left by Δ / 2-δ / 2; when the tensioning wire body approaches the right side of the wire hole, the fourth laser switch sensor is triggered, and the control module controls the vertical horizontal motor to directly drive the protective plate to move to the right by Δ / 2-δ / 2;

[0022] Step 5) After the linear motor completes driving, the control module records the triggering times N of the laser switch sensor, where the triggering times of the first laser switch sensor are recorded as N. 1 , the number of times the second laser switch sensor is triggered is recorded as N 2 , the number of times the third laser switch sensor is triggered is recorded as N 3 , the fourth laser switch sensor trigger times is recorded as N 4 ;

[0023] Step 6) The cumulative driving displacement of each linear motor is superimposed, and the limit value of the cumulative displacement value is set. During the long-term operation of the tensioning wire system, when the tensioning wire body approaches the edge of the tensioning wire protection tube, the control module issues a warning to the dam safety monitoring system according to the corresponding control logic; the limit value of the cumulative displacement value should be set according to the calibrated position of the tensioning wire body on the end face of the tensioning wire protection tube. The displacement limit values ​​of the tensioning wire in the four directions of up, down, left and right are respectively: Y 1 , Y 2 , X 1 and X 2 The limit displacement control logic of the control module is as follows. When one of them is met, an early warning is issued to the dam safety monitoring system:

[0024] When N 1 ≥N 2 ,(N 1 -N 2 +1)(Δ / 2-δ / 2)>Y 1 hour;

[0025] When N 1 <N 2 ,(N2 -N 1 +1)(Δ / 2-δ / 2)>Y 2 hour;

[0026] When N 3 ≥N 4 ,(N 3 -N 4 +1)(Δ / 2-δ / 2)>X 2 hour;

[0027] When N 3 <N 4 ,(N 4 -N 3 +1)(Δ / 2-δ / 2)>X 1 hour;

[0028] Step 7) After receiving the alarm information, on the one hand, the cumulative displacement of the measuring point is compared and analyzed with the displacement monitoring index, and on the other hand, it can be discovered in time that the tensioning line body is close to the edge of the tensioning line protection tube, and the staff is arranged to adjust the end of the tensioning line to restore it to normal monitoring operation; the dam monitoring system displays the plane coordinates (x, y) of the measured tensioning line body at each control device, so as to compare the measured values ​​of the tensioning line instrument and predict the approximate distribution of the deformation of the dam body in advance.

[0029] Compared with the prior art, the present invention has at least the following beneficial technical effects:

[0030] The invention provides a protective automatic control device for end points and measuring points of a dam tension line. The device is advanced in that a nested structure of a direct-drive protective plate and a follow-up protective plate is provided, thereby overcoming the difficulty of limited structural dimensions of a measuring point component box in the vertical direction; a laser switch sensor is adopted, which has a compact structure, safe and reliable operation, long service life and low cost; the characteristics of a linear motor in low-speed reciprocating motion and direct transmission are utilized, the micro-control has high sensitivity and positioning accuracy, and various positioning errors caused by intermediate links are eliminated; the automatic control logic is concise and clear, and is easy to adjust and control, and the thin protective cover plate, the laser switch and the linear motor cooperate to have good follow-up performance; the protective device has an exquisite overall structure and is easy to install, the equipment cost is low and easy to implement, the control method and logic are simple and clear, the alarm judgment conditions are clear, it has good applicability and working stability, and has good protection and monitoring effects on the tension line system.

[0031] The present invention provides a working method for a protective automatic control device for end points and measuring points of a dam tension line. The method is advanced in that it adopts the control principle of "single trigger, linear drive", the control logic of each laser switch sensor and the corresponding linear motor is clear, the process is simple and clear, and it is easy to implement; the cumulative driving displacement limit value setting of the linear motor has a certain redundancy, which improves the reliability of the tension line monitoring data, effectively avoids the edge jamming of the tension line body, and ensures the activity range and range of the measuring point component; through the relationship between the number of laser switch sensor triggers and the limit displacement, the automatic alarm function is realized, and the tension line equipment can be adjusted in time and normal monitoring can be restored to avoid the occurrence of interrupted measurement and abnormal measurement values, which greatly improves the working stability and effectiveness of the tension line device. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the three-dimensional structure and installation position of the protective automatic control device at the end point and measuring point of the dam tension line;

[0033] Figure 2 It is a schematic diagram of the structure of the protective automatic control device for the end point and measuring point of the tensioning line;

[0034] Figure 3 It is a schematic diagram of the AA section of the protection automatic control device;

[0035] Figure 4 It is a block diagram of the working method of the protection automatic control device of the tension line end point and the measuring point;

[0036] Figure 5 This is a schematic diagram for calibrating the position of the tensioning wire;

[0037] Figure 6 It is a flow chart of the working method of the protection automatic control device for the end point and measuring point of the dam tension line;

[0038] Figure 7 The invention discloses a specific embodiment of the protective automatic control device for the end point and measuring point of the dam tension line.

[0039] Description of reference numerals:

[0040] 1-direct drive protective plate, 2-follow-up protective plate, 3-compression spring, 4-wire hole, 5-lower guide rail, 6-side guide rail, 7-guide groove, 8-linear motor, 9-thrust connecting rod, 10-laser switch sensor, 11-control module, 12-tensioning wire protection tube, 13-measuring point box, 14-tensioning wire body, 15-tensioning wire instrument, 16-floating device, 17-dam safety monitoring system, 18-hard plastic rubber strip, 201-upper follow-up protective plate, 202-lower follow-up protective plate, 301-left compression spring, 302-right compression spring, 801-vertical linear motor, 802-horizontal linear motor, 101-first laser switch sensor, 102-second laser switch sensor, 103-third laser switch sensor, 104-fourth laser switch sensor. DETAILED DESCRIPTION

[0041] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0042] refer to Figures 1 to 4 : The protective automatic control device for the end points and measuring points of the dam tensioning line of the present invention includes a direct drive protective plate, a follower protective plate 2, a compression spring 3, a wire hole 4, a lower guide rail 5, a side guide rail 6, a guide groove 7, a linear motor, a thrust connecting rod 9, a laser switch sensor 10 and a control module 11.

[0043] The follow-up protective plate is divided into an upper follow-up protective plate 201 and a lower follow-up protective plate 202, which are closed at the left and right sides and the side of the direct-driven protective plate. The upper and lower edges of the direct-driven protective plate are provided with T-shaped edges, which shuttle between the upper follow-up protective plate 201 and the lower follow-up protective plate 202; the bottom of the direct-driven protective plate is connected to the bottom end faces of the upper follow-up protective plate 201 and the lower follow-up protective plate 202 by a left compression spring 301 and a right compression spring 302 to realize the follow-up performance of the upper follow-up protective plate 201 and the lower follow-up protective plate 202; A square wire hole 4 is opened in the middle of the direct-drive protective plate, and a laser switch sensor 10 is arranged around the wire hole 4 to detect whether the tensioning line measuring line is about to touch the edge in four directions; T-shaped guide rails are arranged at the bottom and sides of the direct-drive protective plate, namely the lower guide rail 5 and the side guide rail 6, which cooperate with the guide groove 7 arranged at the end of the thrust connecting rod 9 to realize transmission; the linear motor is divided into a vertical linear motor 801 and a horizontal linear motor 802, which are respectively fixed at the bottom and the side of the installation section, and are used to drive the direct-drive protective plate to move.

[0044] The protective automatic control device for the end points and measuring points of the dam tensioning line is installed at the ends of the tensioning line protection tube 12 at the fixed end and the tensioning end of the tensioning line, and between the tensioning line protection tube 12 sections of each tensioning line measuring point and the tensioning line instrument 15 or the floating device 16. This device is not required for measuring points where the measuring point box 13 and the cover plate are tight and the working environment of the middle section of the tensioning line is good.

[0045] The length L of the direct drive protection plate and the upper follower protection plate 201 and the lower follower protection plate 202 is ≥ 2R, and the width d of the direct drive protection plate 1 = R, width d of the upper follow-up guard plate 201 and the lower follow-up guard plate 202 2 Determine d by the vertical dimension of the tensioning line measuring point box 13 2 =D / 2-R / 2. Wherein, R is the diameter of the tensioning wire protection tube 12, and D is the vertical dimension of the tensioning wire measuring point box 13.

[0046] A wide U-shaped groove is provided in the middle of the upper plates of the upper follower guard plate 201 and the lower follower guard plate 202, and a half U-shaped groove is provided on the right side for the lower guide rail 5 and the side guide rail 6 to pass through, so as to ensure the vertical travel of the direct-driven guard plate.

[0047] The lower guide rail 5 and the right guide rail located below and on the right side of the direct drive protection plate have a stroke length equal to the diameter of the tensioning wire protection tube 12, so that the wire hole 4 area can be moved to cover the entire cross-section of the tensioning wire protection tube 12.

[0048] The wire hole 4 in the middle of the direct-driven protective plate is arranged in a square with a side length of 20 to 30 mm. A groove with a width of 3 mm is opened on the left side of the wire hole 4 of the direct-driven protective plate to allow the tensioning wire body 14 to pass through when the device is installed, and a hard plastic rubber strip 18 of the same thickness as the direct-driven protective plate is used to fill the groove.

[0049] The effective stroke of the horizontal linear motor 802 and the vertical linear motor 801 is 2R, and the linear motor 8 of appropriate model and thrust is selected according to the effective stroke, load weight and movement speed;

[0050] The horizontal linear motor 802 is arranged on the left or right side of the installation section, and the vertical linear motor 801 is arranged in the concrete groove at the bottom of the installation section. The depth of the concrete groove is 2R to meet the requirement of limited vertical structural dimensions of the measuring point component box.

[0051] The laser switch sensors 10 are installed in parallel and cross-arranged around the wire hole 4 without interfering with each other. The light source of the laser switch should be equal to the wire hole 4 around the wire hole 4, and the distance should be greater than twice the diameter of the tension wire body 14, preferably 3 to 5 mm;

[0052] See also Figure 6 , and Figure 7 Taking the example of the tensioning wire body moving to the lower left relative to the tensioning wire protection tube 12, the present invention provides a working method of a protective automatic control device for a dam tensioning wire end point and a measuring point, comprising the following steps:

[0053] Step 1) Use a vernier caliper to calibrate the position of the tensioning wire body 14 on the end surface of the tensioning wire protection tube 12, and establish a rectangular coordinate system with the tensioning wire body 14 as the coordinate origin. Figure 5 As shown, the distance between the calibration line and the right edge of the tensioning line protection tube 12 is X 1 , the distance from the left edge of the tensioning wire protection tube 12 is X 2 , the distance from the upper edge of the tensioning wire protection tube 12 is Y 1 , the distance from the lower edge of the tensioning wire protection tube 12 is Y 2 ;

[0054] Step 2) Install and fix the protective device, move the direct drive protective plate, place the tensioning wire at the center of the middle measuring wire hole, and calibrate the initial coordinates of the tensioning wire body 14 to (0, 0);

[0055] Step 3) Use a vernier caliper to calibrate the size Δ of the wire hole 4, measure the distance δ between the light source of the laser switch sensor 10 and the periphery of the wire hole 4, and adjust the distance δ between the light beams of the four laser switch sensors 10 and the periphery of the wire hole 4 to be consistent;

[0056] Step 4) After the calibration is completed, the tensioning line body 14 is in a free moving state. As the deformation of the dam body occurs, the tensioning line triggers the measuring laser switch sensor 10, and the measuring laser switch sensor 10 transmits the signal to the control module 11. The control module 11 adopts the principle of "single trigger, linear drive" according to the triggering situation to control the operation of the linear motor, drive the direct drive protection plate to move, and place the tensioning line in the middle position of the triggering direction;

[0057] Step 5) After the linear motor is driven, the control module 11 records the triggering times N of the laser switch sensor 10, and the triggering times of the laser switch sensor 101 are recorded as N 1 , the number of times the second laser switch sensor 102 is triggered is recorded as N 2 , the number of times the third laser switch sensor 103 is triggered is recorded as N 3 The number of times the fourth laser switch sensor 104 is triggered is recorded as N 4 ;

[0058] Step 6) Superimpose the cumulative drive displacements of each linear motor 8 and set a limit value for the cumulative displacement value. During long-term operation of the tensioning wire system, when the tensioning wire body 14 approaches the edge of the tensioning wire protection tube 12, the control module 11 sends a warning to the dam safety monitoring system 17 according to the corresponding control logic.

[0059] Step 7) After receiving the alarm information, on the one hand, the cumulative displacement of the measuring point can be compared and analyzed with the displacement monitoring index, and on the other hand, it can be discovered in time that the tensioning line body 14 is close to the edge of the tensioning line protection tube 12, and the staff can be arranged to adjust the end of the tensioning line to restore normal monitoring operation.

[0060] In the step 4), when the tensioning wire body 14 approaches the upper edge of the wire hole 4, the laser switch sensor 101 is triggered, and the control module 11 controls the vertical linear motor 801 to drive the direct-driven protective plate to move upward by Δ / 2-δ / 2; when the tensioning wire body 14 approaches the lower edge of the wire hole 4, the second laser switch sensor 102 is triggered, and the control module 11 controls the vertical linear motor 801 to drive the direct-driven protective plate to move downward by Δ / 2-δ / 2; when the tensioning wire body 14 approaches the left side of the wire hole 4, the third laser switch sensor 103 is triggered, and the control module 11 controls the horizontal linear motor 802 to drive the direct-driven protective plate to move to the left by Δ / 2-δ / 2; when the tensioning wire body 14 approaches the right side of the wire hole 4, the fourth laser switch sensor 104 is triggered, and the control module 11 controls the vertical horizontal motor to drive the direct-driven protective plate to move to the right by Δ / 2-δ / 2.

[0061] In step 6), the limit value of the cumulative displacement value should be set according to the calibration position of the tensioning wire body 14 on the end surface of the tensioning wire protection tube 12. The displacement limit values ​​of the four directions of the tensioning wire in the upper, lower, left and right directions are respectively: 1 , Y 2 , X 1 , X 2 .

[0062] In step 6), the limit displacement control logic of the control module 11 is as follows. When one of the above equations is satisfied, an early warning is issued to the dam safety monitoring system 17:

[0063] When N 1 ≥N 2 ,(N 1 -N 2 +1)(Δ / 2-δ / 2)>Y 1 hour;

[0064] When N 1 <N 2 ,(N 2 -N 1 +1)(Δ / 2-δ / 2)>Y 2 hour;

[0065] When N 3 ≥N 4 ,(N 3 -N 4 +1)(Δ / 2-δ / 2)>X 2 hour;

[0066] When N 3 <N 4 ,(N 4 -N 3 +1)(Δ / 2-δ / 2)>X 1 hour;

[0067] In the step 7), the dam monitoring system displays the plane coordinates (x, y) of the measured tension wire body 14 at each controlled device, so as to compare the measured values ​​of the tension wire instrument 15 and predict the approximate distribution of the deformation of the dam body in advance.

[0068] The above-mentioned drawings and specific implementation methods describe the basic principles, features and specific implementation methods of the present invention, but the present invention is not limited to the above-mentioned specific implementation methods. Any simple modifications, form changes and equivalent structural changes made to the above implementation methods based on the technical essence of the present invention are still within the protection scope of the technical solution of the present invention.

Claims

1. A protective automatic control device for the end points and measuring points of a dam tensioning line, characterized in that: It comprises a direct drive protection plate (1), a follower protection plate (2), a compression spring (3), a wire hole (4), a lower guide rail (5), a side guide rail (6), a guide groove (7), a linear motor (8), a thrust connecting rod (9), a laser switch sensor (10) and a control module (11); wherein, The follow-up protective plate (2) is divided into an upper follow-up protective plate (201) and a lower follow-up protective plate (202), and is in a double-layer thin box shape. The left and right sides and the side of the direct drive protective plate (1) are closed. The upper and lower edges of the direct drive protective plate (1) are provided with T-shaped edges, and the direct drive protective plate (1) shuttles between the upper follow-up protective plate (201) and the lower follow-up protective plate (202); two compression springs (3) are used at the bottom of the direct drive protective plate (1) to connect the bottom end surfaces of the upper follow-up protective plate (201) and the lower follow-up protective plate (202) to achieve the follow-up performance of the upper follow-up protective plate (201) and the lower follow-up protective plate (202); a square wire hole (4) is opened in the middle of the direct drive protective plate (1), and the wire hole (4) is surrounded by A laser switch sensor (10) is arranged in each direction to detect whether the tensioning line measuring line is about to touch the edge in four directions; T-shaped guide rails, namely a lower guide rail (5) and a side guide rail (6), are arranged below and on the side of the direct drive protection plate (1), and cooperate with the guide groove (7) arranged at the end of the thrust connecting rod (9) to realize transmission; the linear motor (8) is divided into a vertical linear motor (801) and a horizontal linear motor (802), which are respectively fixed to the bottom and side of the installation section, and are used to drive the direct drive protection plate (1) to move; the output end of the laser switch sensor (10) is connected to the input end of the control module (11), and the output end of the control module (11) is connected to the control end of the linear motor (8); The wire hole (4) in the middle of the direct drive protection plate (1) is arranged in a square shape with a side length of 20 to 30 mm. A slot with a width of 3 mm is opened on the left side of the wire hole (4) of the direct drive protection plate (1) to allow the tensioning wire body (14) to pass through when the device is installed, and a hard plastic rubber strip (18) of the same thickness as the direct drive protection plate (1) is provided to fill the slot; The laser switch sensors (10) are installed in parallel and cross-arranged around the wire hole (4) without interfering with each other. The light source of the laser switch is equidistant from the wire hole (4) around the wire hole (4), and the distance is greater than twice the diameter of the tension wire body (14), which is 3 to 5 mm.

2. A protective automatic control device for the end points and measuring points of a dam tensioning line according to claim 1, characterized in that: The protective automatic control device is installed at the ends of the tensioning line protection tube (12) at the fixed end and the tensioning end of the tensioning line and between the sections of the tensioning line measuring point protection tube (12) and the tensioning line instrument (15) or the floating device (16).

3. The automatic protection control device for the end points and measuring points of the dam tensioning line according to claim 1 is characterized in that: The lengths L of the direct drive protection plate and the upper follower protection plate (201) and the lower follower protection plate (202) are ≥ 2R, the width d1 of the direct drive protection plate (1) is =R, and the widths d2 of the upper follower protection plate (201) and the lower follower protection plate (202) are determined by the vertical dimension of the tensioning line measuring point box (13) d2 =D / 2-R / 2; wherein R is the diameter of the tensioning line protection tube (12), and D is the vertical dimension of the tensioning line measuring point box (13).

4. The automatic protection control device for the end points and measuring points of the dam tensioning line according to claim 1 is characterized in that: A wide U-shaped groove is arranged in the middle of the upper plate of the upper follower protection plate (201) and the lower follower protection plate (202), and a half U-shaped groove is arranged on the right side for the lower guide rail (5) and the side guide rail (6) to pass through, so as to ensure the vertical travel of the direct drive protection plate (1).

5. The automatic protection control device for the end points and measuring points of the dam tensioning line according to claim 1 is characterized in that: The travel length of the lower guide rail (5) and the right guide rail located below and on the right side of the direct drive protection plate (1) is equal to the diameter of the tensioning wire protection tube (12), so as to ensure that the area of ​​the wire hole (4) can be moved to cover the entire cross-section of the protection tube (12).

6. The automatic protection control device for the end points and measuring points of the dam tensioning line according to claim 1 is characterized in that: The effective stroke of the horizontal linear motor (802) and the vertical linear motor (801) is 2R.

7. The automatic protection control device for the end points and measuring points of the dam tensioning line according to claim 1 is characterized in that: The horizontal linear motor (802) is arranged on the left or right side of the installation section, and the vertical linear motor (801) is arranged in a concrete groove at the bottom of the installation section, and the depth of the concrete groove is 2R.

8. A working method of a protective automatic control device for end points and measuring points of a dam tension line according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1) Use a vernier caliper to calibrate the position of the tensioning wire body (14) on the end surface of the tensioning wire protection tube (12), establish a rectangular coordinate system with the tensioning wire body (14) as the coordinate origin, and calibrate that the distance between the calibrated wire body and the right edge of the tensioning wire protection tube (12) is X1, the distance between the calibrated wire body and the left edge of the tensioning wire protection tube (12) is X2, the distance between the calibrated wire body and the upper edge of the tensioning wire protection tube (12) is Y1, and the distance between the calibrated wire body and the lower edge of the tensioning wire protection tube (12) is Y2; Step 2) Install and fix the protective device, move the direct drive protective plate (1), place the tensioning wire at the center of the middle measuring wire hole, and calibrate the initial coordinates of the tensioning wire body (14) to (0, 0); Step 3) Use a vernier caliper to calibrate the size Δ of the wire hole (4), measure the distance δ between the light source of the laser switch sensor (10) and the periphery of the wire hole (4), and adjust the distance δ between the light beams of the four laser switch sensors (10) and the periphery of the wire hole (4) to be consistent; Step 4) After the calibration is completed, the tensioning wire body (14) is in a free moving state. As the deformation of the dam body occurs, the tensioning wire triggers the laser switch sensor (10), and the laser switch sensor (10) transmits a signal to the control module (11). The control module (11) controls the operation of the linear motor according to the triggering situation and adopts the principle of "single trigger, linear drive" to drive the direct drive protection plate (1) to move and place the tensioning wire in the middle position of the triggering direction; when the tensioning wire body (14) approaches the upper edge of the wire hole (4), the first laser switch sensor (101) is triggered, and the control module (11) controls the vertical linear motor to drive the direct drive protection plate (1) to move upward by Δ / 2-δ / 2; when the tensioning wire body (14) approaches the lower edge of the wire hole (4), triggering the second laser switch sensor (102), and the control module (11) controls the vertical linear motor (801) to drive the direct drive protection plate (1) to move downward by Δ / 2-δ / 2; when the tensioning wire body (14) approaches the left side of the wire hole (4), triggering the third laser switch sensor (103), the control module (11) controls the horizontal linear motor (802) to drive the direct drive protection plate (1) to move to the left by Δ / 2-δ / 2; when the tensioning wire body (14) approaches the right side of the wire hole (4), triggering the fourth laser switch sensor (104), the control module (11) controls the vertical horizontal motor to drive the direct drive protection plate (1) to move to the right by Δ / 2-δ / 2; Step 5) After the linear motor completes driving, the control module (11) records the triggering number N of the laser switch sensor (10), wherein the triggering number of the first laser switch sensor (101) is recorded as N1, the triggering number of the second laser switch sensor (102) is recorded as N2, the triggering number of the third laser switch sensor (103) is recorded as N3, and the triggering number of the fourth laser switch sensor (104) is recorded as N4; Step 6) The accumulated driving displacements of the linear motors (8) are superimposed, and the limit value of the accumulated displacement value is set. During the long-term operation of the tensioning wire system, when the tensioning wire body (14) approaches the edge of the tensioning wire protection tube (12), the control module (11) issues a warning to the dam safety monitoring system (17) according to the corresponding control logic; the limit value of the accumulated displacement value should be set according to the calibrated position of the tensioning wire body (14) on the end face of the tensioning wire protection tube (12), and the displacement limit values ​​of the tensioning wire in the four directions of up, down, left and right are respectively: Y1, Y2, X1 and X2; the limit displacement control logic of the control module (11) is as follows, and when one of them is satisfied, an early warning is issued to the dam safety monitoring system (17): When N1≥N2, (N1-N2+1)(Δ / 2-δ / 2)>Y1; When N1<N2, (N2-N1+1)(Δ / 2-δ / 2)>Y2; When N3≥N4, (N3-N4+1)(Δ / 2-δ / 2)>X2; When N3<N4, (N4-N3+1)(Δ / 2-δ / 2)>X1; Step 7) After receiving the alarm information, on the one hand, the cumulative displacement of the measuring point is compared and analyzed with the displacement monitoring index, and on the other hand, it can be found in time that the tensioning wire body (14) is close to the edge of the tensioning wire protection tube (12), and the staff is arranged to adjust the end of the tensioning wire to restore the normal monitoring operation; the dam monitoring system displays the plane coordinates (x, y) of the measured tensioning wire body (14) at each control device, so as to compare the measured values ​​of the tensioning wire instrument (15) and predict the approximate distribution of the deformation of the dam body in advance.

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