CN112113481A - Device and method for measuring dam body breach geometric shape in water tank test - Google Patents
Device and method for measuring dam body breach geometric shape in water tank test Download PDFInfo
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- CN112113481A CN112113481A CN202011092475.XA CN202011092475A CN112113481A CN 112113481 A CN112113481 A CN 112113481A CN 202011092475 A CN202011092475 A CN 202011092475A CN 112113481 A CN112113481 A CN 112113481A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/004—Measuring arrangements characterised by the use of mechanical techniques for measuring coordinates of points
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M10/00—Hydrodynamic testing; Arrangements in or on ship-testing tanks or water tunnels
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- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention discloses a device and a method for measuring dam body breach geometric shape in a water tank test, which comprises two roller linear guide rails fixed at the top end of a water tank, wherein the two roller linear guide rails are respectively arranged on two sides of the water tank in parallel, the openings of the two roller linear guide rails are oppositely arranged, a cylindrical guide rail is arranged between the two roller linear guide rails, a sliding block is connected onto the cylindrical guide rail in a sliding manner and can rotate around the cylindrical guide rail, a vertical measuring rod is connected onto the sliding block, the lower end of the vertical measuring rod extends into the water tank, the extending length of the vertical measuring rod can be adjusted, and a measuring hammer is connected onto the lower end of the vertical measuring rod. According to the invention, the measuring tool is arranged at the top of the water tank, and the geometrical parameters of the breach can be measured only by operating the measuring tool at the top, so that the measuring tool is very convenient; the invention is not easily affected by fluctuating water surface and turbid water body; the linear guide rail belongs to a precision part, has small sliding and rolling friction coefficients and high sensitivity, and greatly improves the measurement precision.
Description
Technical Field
The invention relates to the technical field of dam break hydraulic model tests, in particular to a device and a method for measuring the geometrical shape of a dam break in a water tank test.
Background
In the design and management of hydraulic engineering, it is very important to effectively forecast the catastrophic water flow phenomenon of dam body burst in time. At present, a physical model test is an important method for researching the practical problems of the engineering in the water conservancy industry, and the complex practical problems can be solved by a similar principle. The dam break hydraulic model test is carried out in the water tank, and the actual dam body break process can be simulated and observed. The development of the break mouth determines the flow of the downward-flowing flood and the break process of the dam body, and is an important content of dam break research, so that the measurement mode of the geometric dimension of the break mouth becomes an important problem of the test.
The existing measuring devices for geometric dimensions are mainly classified into two types: contact measurement and non-contact measurement. The contact type measuring device is provided with measuring tools such as rulers, vernier calipers, screw micrometer and the like, has the characteristics of simple operation and higher precision, is easily limited by the size of a measured component and a measuring space and cannot meet corresponding requirements, and has interaction with water flow to generate certain influence on the original flow state and the measuring precision of the water flow; the non-contact measuring device is mainly realized by optical and optical sensors, such as theodolite, total station, AR measurer, etc., and has the characteristics of high speed, accuracy and small influence due to the limitation of measuring space, but is easily influenced by measuring environment temperature, illumination condition, etc., and even cannot measure.
In the dam break hydraulic model test process, because the test process is fast and limited by the measurement space, a tester is difficult to enter the test water tank, and the geometric dimension of a break opening is rapidly and effectively measured by directly using a measurement tool; and the measurement object is in turbid water, the optical path passes through a solid-liquid-gas three-phase body, and is easily influenced by a fluctuating water surface, and the corresponding size is difficult to measure through optical equivalent equipment.
Disclosure of Invention
The invention aims to provide a device for measuring the geometrical shape of a dam break in a water tank test, which can measure the geometrical size of the break in the dam break hydraulic model water tank test, breaks through the limitation of a space environment to a certain extent, and has the advantages of simple structure, convenience in implementation, accurate result and no limitation of the space environment.
In order to achieve the above purpose, the invention provides the following technical scheme:
the utility model provides a device for measuring dam body ulcerate mouth geometry in basin is experimental, including fixing the gyro wheel linear guide on the basin top, gyro wheel linear guide has two, parallel arrangement is in the both sides of basin respectively, and two gyro wheel linear guide's opening sets up relatively, be provided with the cylinder guide between two gyro wheel linear guide, sliding connection has the slider on the cylinder guide, and the slider can rotate around the cylinder guide, be connected with perpendicular measuring staff on the slider, the lower extreme of perpendicular measuring staff stretches into in the basin, and stretch into length and can adjust, the lower extreme of perpendicular measuring staff is connected with the weight.
Specifically, the sliding block is of a plate-shaped structure, lantern rings are fixedly arranged on two sides of the sliding block, each lantern ring is of a cuboid structure, a threaded through hole is formed in each lantern ring, the lantern ring is fixedly arranged on one side of the sliding block, the threaded through hole is vertically arranged, and the vertical measuring rod is in threaded connection with the threaded through hole of each lantern ring; the slider opposite side has set firmly two lantern rings, and the screw thread through-hole level of two lantern rings sets up, and the screw thread through-hole central line coincidence of two lantern rings, and cylindrical guide rail threaded connection is in the screw thread through-hole of these two lantern rings. The sliding block can rotate and slide on the cylindrical guide rail, and the length of the vertical measuring rod extending into the water tank can be adjusted. The vertical measuring rod can rotate 360 degrees around the cylindrical linear guide rail through the sliding block, slide along the axial direction of the cylindrical linear guide rail and slide along the lantern ring (the axial direction of the vertical measuring rod), and the threaded wall at the position can be contracted by screwing the positioning nut to lock any angle and any position, so that the flexibility and the practicability of the whole tool are improved.
Furthermore, two positioning rings are respectively connected with two lantern rings on the other side of the sliding block in a threaded manner, and the two positioning rings are respectively positioned at one ends, far away from each other, of the two lantern rings; the holding ring is including location hollow screw and set nut, the inside hollow through-hole that has the constant diameter of location hollow screw, location hollow screw has two connecting portion, two connecting portion structure as an organic whole, the external screw thread has all been seted up to two connecting portion outward appearances, wherein the external diameter of connecting portion one is less than the external diameter of connecting portion two, the external diameter of connecting portion one equals lantern ring internal thread through-hole internal diameter, the both ends external diameter of connecting portion two varies, the one end that is close to connecting portion one is the main aspects, the one end of keeping away from connecting portion one is the tip, it has the breach to open along its length direction on connecting portion two, the opening size of breach reduces from tip to main aspects in proper order, cylindrical guide stretches into and wears out location hollow screw, set nut twists along the.
Furthermore, the cylindrical linear guide rail comprises a cylindrical short guide rail and a cylindrical long guide rail, one end of the cylindrical long guide rail is connected with the roller through a positioning ring, the other end of the cylindrical long guide rail is a threaded end used for connecting the cylindrical short guide rail, and the threaded end is connected with the cylindrical short guide rail through the positioning ring; the cylinder short guide rail is hollow, one end of the cylinder short guide rail is connected with the threaded end of the cylinder long guide rail through a positioning ring, and the other end of the cylinder short guide rail is connected with the roller through the positioning ring.
The whole length of cylinder linear guide is adjusted at the length of hollow screw in the location to the screw thread end of the long guide rail of accessible control cylinder, and can screw up set nut, contracts the screw thread wall of this department to realize the rigid connection of holding ring and the long guide rail of cylinder, can fix the whole length of cylinder linear guide, in order to adapt to two gyro wheel linear guide's interval.
Preferably, the roller comprises a wheel, a wheel shaft and a wheel cover, one end of the wheel shaft is rigidly connected with the wheel, the other end of the wheel shaft is in threaded connection with the wheel cover, the wheel shaft is located in the positioning hollow screw rod and can rotate freely, the threaded wall of the connection part is contracted by screwing the positioning nut to limit the roller to roll, and the diameter of the wheel cover is larger than the inner diameter of the positioning hollow screw rod and smaller than the outer diameter of the first connecting part of the positioning hollow screw rod. The diameter of the wheel cover is larger than the inner diameter of the positioning hollow screw and smaller than the outer diameter of the annular end of the positioning hollow screw (the inner diameter of the cylindrical linear guide rail), so that the axial displacement of the roller along the cylindrical linear guide rail can be limited.
Preferably, the lower end of the vertical measuring rod is detachably connected with the measuring hammer. The measuring hammer can be replaced by a measuring hammer with other different shapes or other parameter measuring instruments are installed, so that the measurement of specific requirements is convenient, for example, a flow rate measuring instrument and the like are realized. The diameter design of the vertical measuring rod can be small, and the influence of water flow impact is small. The weight of the measuring hammer is enough not to be driven by water flow.
Preferably, the roller linear guide rail, the cylindrical linear guide rail and the vertical measuring rod are all made of stainless steel or aluminum alloy and are all marked with scale marks.
A dam breach geometric shape measuring method comprises the following steps:
1) firstly, roller linear guide rails are parallelly installed on two sides of the top of a water tank, and after a positioning ring, a roller, a cylindrical short guide rail and a cylindrical long guide rail are assembled, the length of the cylindrical linear guide rail is adjusted, and the cylindrical linear guide rail is arranged between the roller linear guide rails;
2) moving the slide block to an XOZ plane where a target point is located along the Y direction, enabling the vertical measuring rod to be in a vertical state through gravity self-locking, screwing positioning rings on the left side and the right side of the slide block, and fixing the position of the vertical measuring rod on the Y axis and the angle between the cylindrical linear guide rail and the vertical measuring rod;
3) moving the cylindrical linear guide rail along the X axis, moving the vertical measuring rod up and down along the Z axis, moving the measuring hammer to the position of a target point A to be measured, and recording the scale mark data of the roller linear guide rail, the cylindrical linear guide rail and the vertical measuring rod, wherein the coordinate of the point A is (X) coordinate1,y1,z1) After a certain process, the measured target point A is moved to A ', and the data is recorded again, namely the coordinate of A' is (x)1′,y1′,z1′)；
4) And repeating the operation to obtain the coordinate change of each characteristic point, and calculating the change process of the geometrical size of the breach.
A plurality of cylindrical linear guide rails are arranged between the two roller linear guide rails, and a plurality of sections are synchronously measured.
Compared with the prior art, the invention has the following beneficial effects:
according to the invention, the measuring tool is arranged at the top of the water tank, and the geometrical parameters of the breach can be measured only by operating the measuring tool at the top, so that the measuring tool is very convenient;
the invention can adapt to the test environment of the hydraulic model test to a greater extent, and is not easily influenced by fluctuating water surface and turbid water body; the linear guide rail belongs to a precision part, has small sliding and rolling friction coefficients and high sensitivity, greatly improves the measurement precision, and simultaneously enables the measuring hammer to move spatially in X, Y, Z directions, so that the whole device has great flexibility; the measuring hammer and the vertical measuring rod are connected through threads and can be assembled and disassembled, and in order to adapt to the variability of the structure in the box and meet the measurement of various parameters, the measuring hammer can be changed into measuring hammers with different shapes or other parameter measuring instruments can be installed for measurement, so that the measurable range and the application range are expanded.
Drawings
FIG. 1 is a view of the spatial arrangement of the tools of the present invention;
FIG. 2 is a schematic view of a tool according to the present invention;
FIG. 3 is a detailed structure diagram of the cylindrical linear guide rail in FIG. 2;
FIG. 4 is a view of the slider configuration of FIG. 2, wherein 4a is a front view configuration, 4b is a rear view configuration, 4c is a top view configuration, and 4d is a side view configuration;
FIG. 5 is a detail view of the slider and the positioning ring shown in FIG. 2;
FIG. 6 is a layout view of a dam break hydraulic model water tank test;
FIG. 7 is a progression of the geometry of the breach.
In the figure: the device comprises a roller linear guide rail 1, a cylindrical linear guide rail 2, a cylindrical short guide rail 3, a cylindrical long guide rail 4, a roller 5, a wheel 6, a wheel shaft 7, a wheel cover 8, a sliding block 9, a lantern ring 10, a vertical measuring rod 11, a measuring hammer 12, a positioning ring 13, a positioning hollow screw 14 and a positioning nut 15.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, belong to the scope of the present invention.
As shown in fig. 1-4, a device for measuring the dam break geometry in a water tank test is used in a dam break hydraulic model water tank test, and comprises a roller linear guide rail 1, a cylindrical linear guide rail 2, a cylindrical short guide rail 3, a cylindrical long guide rail 4, a roller 5, a wheel 6, a wheel shaft 7, a wheel cover 8, a slider 9, a lantern ring 10, a vertical measuring rod 11, a measuring hammer 12, a positioning ring 13, a positioning hollow screw 14 and a positioning nut 15.
In this embodiment, the two roller linear guide rails 1 are arranged at two ends of the water tank top, and are connected with the cylindrical linear guide rail 2 through the rollers 5, and the two roller linear guide rails are located on the same plane, so that the cylindrical linear guide rail 2 can translate on the plane.
In this embodiment, the cylindrical linear guide rail 2 is mainly composed of a cylindrical short guide rail 3, a cylindrical long guide rail 4 and a positioning ring 13.
The inner part of the cylindrical short guide rail 3 is hollow, and the inner diameter d of the cylindrical short guide rail2Equal to the outer diameter D of the annular end of the positioning hollow screw 1414That is, the positioning hollow screw 14 is screwed down to realize the rigid connection between the positioning ring 13 and the cylindrical short guide rail 3;
the diameter D of the threaded end of the cylindrical long guide rail 44Equal to the inner diameter d of the positioning hollow screw 1414The whole length of the cylindrical linear guide rail 2 can be adjusted by controlling the length of the threaded end of the cylindrical long guide rail 4 at the positioning hollow screw 14, the positioning nut 15 can be screwed down, and the threaded wall at the position can be contracted, so that the rigid connection between the positioning ring 13 and the cylindrical long guide rail 4 is realized, and the whole length of the cylindrical linear guide rail 2 can be fixed to adapt to the distance between the two roller linear guide rails 1.
In this embodiment, the rollers 5 are embedded in the linear guide rails 1 of the rollers on both sides, and each linear guide rail is composed of three parts, namely a wheel 6, a wheel shaft 7 and a wheel cover 8.
The wheels 6 are rigidly connected to the axle 7. The wheel shaft 7 and the wheel cover 8 are in threaded connection and can be disassembled.
Diameter D of the axle 77Slightly smaller than the inner diameter d of the positioning hollow screw 1414Namely, the wheel shaft 7 can rotate freely in the positioning hollow screw 14, and the threaded wall at the position is contracted by tightening the positioning nut 15, so that the roller 5 is limited to roll and the position of the cylindrical linear guide rail 2 on the roller linear guide rail 1(X axis) is controlled.
Diameter D of the wheel cover 88Is larger than the inner diameter d of the positioning hollow screw 1414Is smaller than the outer diameter D of the first connecting part of the positioning hollow screw 1414"(inner diameter d of cylindrical linear guide 2)2) The axial displacement of the roller 5 along the cylindrical linear guide rail 2 can be limited. The roller 5 is connected with the cylindrical linear guide rail 2 through a positioning ring 13.
In this embodiment, the front and back of the slider 9 are both collars 10, the collars 10 connect the cylindrical linear guide rail 2 and the vertical measuring rod 11, and the positioning hollow screw 14 is screwed down to realize the rigid connection between the positioning ring 13 and the collars 10.
The vertical measuring rod 11 can rotate 360 degrees around the cylindrical linear guide rail 2 through the sliding block 9, slide axially along the cylindrical linear guide rail 2 and slide along the lantern ring 10 (the vertical measuring rod 11 axially), and can be locked at any angle and any position by screwing the positioning nut 15 and contracting the threaded wall at the position, so that the flexibility and the practicability of the whole tool are improved.
In this embodiment, the measuring hammer 12 is connected to the vertical measuring rod 11 through a screw thread, and can be detached, and the measuring hammer 12 can be replaced by a measuring hammer 12 of other different shapes or other parameter measuring instruments can be installed, so as to facilitate the measurement of specific requirements, such as a flow rate measuring instrument and the like. The diameter of the vertical measuring rod 11 is designed to be small, and the influence of water flow impact is small. The weight of the spindle 12 is sufficient not to be driven by the water flow.
In this embodiment, the positioning ring 13 mainly comprises a positioning hollow screw 14 and a positioning nut 15, the overall length of the cylindrical linear guide rail 2 can be adjusted by controlling the length of the threaded end of the cylindrical long guide rail 4 at the positioning hollow screw 14, and the positioning ring 13 can be used to fix the overall length to adapt to the distance between the two roller linear guide rails 1.
The inner diameter d of the positioning hollow screw 1414The through lengths are equal, and the inner diameter d of the hollow through hole in the hollow screw is positioned14Equal to the diameter D of the threaded end of the long cylindrical guide rail 44Slightly larger than the diameter D of the wheel axle 77Smaller than the diameter D of the wheel cover 88. A first outer diameter D of the connecting part of the positioning hollow screw 1414Is equal to the inner diameter d of the cylindrical short guide rail 32Equal to the inner diameter d of the collar 1010Greater than the diameter D of the wheel cover 88。
The outer diameter D of the positioning nut 1515Outer diameter D of two large ends of connecting part of positioning hollow screw 1414' both equal to the outer diameter D of the cylindrical short guide rail 32. The inner diameter d of the positioning nut 1515Equal to the outer diameter D of the two small ends of the connecting part of the positioning hollow screw 1414And the positioning nut 15 is tightened to contract the threaded wall at the position, so that the displacement and the rotation of the object in the wall at the position are limited.
In this embodiment, the roller linear guide 1, the cylindrical linear guide 2 and the vertical measuring rod 11 are all made of stainless steel or aluminum alloy and are marked with scales, and all directions have high rigidity, high measurement accuracy, corrosion resistance and are not easy to damage.
The dam body breach geometric shape measuring method based on the measurement comprises the following steps:
1) firstly, roller linear guide rails 1 are arranged on two sides of the top of the water tank in parallel, and after other components are assembled, the length of a cylindrical linear guide rail 2 is adjusted and is arranged in the roller linear guide rails 1.
2) The slide block 9 is moved to the XOZ plane where a target point is located along the Y direction, the vertical measuring rod 11 is in a vertical state through gravity self-locking, positioning rings 13 on the left side and the right side of the slide block are screwed, and the position of the vertical measuring rod 11 (including a measuring hammer 12) on the Y axis and the angle between the cylindrical linear guide rail 2 and the vertical measuring rod 11 are fixed.
3) Moving the cylindrical linear guide rail 2 along the X axis, moving the vertical measuring rod 11 (including the measuring hammer 12) up and down along the Z axis, moving the measuring hammer 12 to the position of a target point A to be measured, and recording data of the roller linear guide rail 1, the cylindrical linear guide rail 2 and the vertical measuring rod 11, wherein the coordinate of the point A is (X) coordinate1,y1,z1) After a certain process, the target point A to be detected is moved to the position A',the data is again recorded, i.e. with the A' coordinate (x)1′,y1′,z1′)。
4) And repeating the operation to obtain the coordinate change of each characteristic point, and calculating the change process of the geometrical size of the breach.
Example (b): in the dam break hydraulic model test of the earth-rock dam, the height H of the dam body model is 80cm, the length B along the axis of the dam is 100cm, and the width L of the dam top0The slope ratio i between the upstream and the downstream is 1:1.5, which is 50 cm. A trapezoidal drainage groove is arranged in the middle of the top of the dam, and the bottom width b of the drainage groove05cm and groove depth h012cm, considering the self-stability requirement of the side slope, the slope is i01:1. Before the test is started, the measuring device is installed according to the operation, and the position of a target point A to be measured is shown in the figure.
Firstly, moving a slide block 9 along the Y direction to enable a vertical measuring rod 11 to be positioned on an XOZ plane where a target point A is positioned, enabling the vertical measuring rod 11 to be positioned in the vertical direction through gravity self-locking, screwing positioning rings 13 on the left side and the right side of the slide block 9, and fixing the position of the vertical measuring rod 11 (including a measuring hammer 12) on the Y axis and the angle between the vertical measuring rod 11 and a cylindrical linear guide rail 2;
subsequently, the cylindrical linear guide rail 2 is moved along the X axis, so that the vertical measuring rod 11 is positioned on the YOZ plane where the target point A is positioned, the positioning ring 13 on the inner side of the roller 5 is screwed, and the vertical measuring rod 11 (including the measuring hammer 12) is fixed at the position of the X axis, so that the vertical measuring rod 11 (including the measuring hammer 12) can only move up and down along the Z axis;
finally, the vertical measuring bar 11 (including the measuring hammer 12) is moved up and down along the Z axis so that the measuring hammer 12 contacts the target point a, and data a (x) respectively located on the roller linear guide 1, the cylindrical linear guide 2, and the vertical measuring bar 11 are read1,y1,z1)。
The measured target point a has point coordinates (234.50,35.50, 68.00).
After a period of time after the dam body starts to break through the test, the break mouth gradually develops and expands, the point A evolves to the position A ', and the operation is repeated, so that the coordinates of the target point A' are (257.30,28.90 and 43.10).
Finally, a series of coordinate change processes of the target points can be obtained, namely, the change of the geometrical shape of the breach can be reflected, as shown in fig. 7.
Further, a plurality of the present invention devices are installed on the same roller linear guide 1, so that a plurality of sections can be measured simultaneously, as shown in fig. 4. For example, the YOZ section 2, in order to record the top width change of the downstream breach face within a certain period of time, the cylindrical linear guide rail 2 can be moved to the YOZ section 2 along the X axis and fixed by tightening the positioning ring 13; through gravity self-locking, the vertical measuring rod 11 is in a vertical state, the vertical measuring rod 11 is moved along the Z-axis direction, the measuring hammer 12 is rightly positioned at the top end of the breach surface, and the positioning ring 13 is screwed to lock the height of the measuring hammer 12; moving the slide block 9 along the Y axis to enable the measuring hammer 12 to touch the left end and the right end of the breach successively, and quickly reading and recording the reading engraved on the cylindrical linear guide rail 2, wherein the difference between the reading and the reading is the instantaneous top width of the downstream breach surface; and repeating the operation at the same time interval to obtain a series of data, namely the top width change condition of the downstream breach face in the time period.
Further, for recording the depth change situation of the downstream breach face within a certain period of time, similar to the above operation, only the positioning ring 7 needs to be screwed down to fix the cylindrical linear guide rail 2 and the slider 9, the vertical measuring rod 11 is moved along the Z-axis direction, and the reading is read, so that the depth change situation of the downstream breach face within the period of time can be known.
Further, in order to measure the flow rate variation of a certain space point, as shown in the YOZ section 1, the flow rate measuring instrument is installed after the measuring hammer 12 is detached, and the positioning ring 7 is screwed to fix the cylindrical linear guide rail 2, the vertical measuring rod 11 and the sliding block 9, so that the flow rate measuring instrument is positioned at the certain point, and the flow rate variation of the space point can be measured.
According to the invention, the measuring tool is arranged at the top of the water tank and is used for measuring, the water tank does not need to enter the water tank, the limitation of the space environment is broken through to a certain extent, the operation is simple and convenient, the geometric measurement precision is higher, the fixed-point multifunctional measurement can be carried out, and the requirements of various aspects of the test are met.
The above is only a preferred embodiment of the invention, it should be noted that: it will be apparent to those skilled in the art that the location of each facility can be adjusted without departing from the principles of the invention, and such adjustments should be considered within the scope of the invention.
The undescribed parts of the present invention are the same as or implemented using prior art.
Claims (9)
1. The utility model provides a device for measuring dam body ulcerate mouth geometry among basin is experimental, a serial communication port, including fixing the gyro wheel linear guide on the basin top, gyro wheel linear guide has two, parallel arrangement is in the both sides of basin respectively, and two gyro wheel linear guide's opening sets up relatively, be provided with the cylinder guide between two gyro wheel linear guide, sliding connection has the slider on the cylinder guide, and the slider can rotate around the cylinder guide, be connected with perpendicular measuring staff on the slider, the lower extreme of perpendicular measuring staff stretches into in the basin, and stretch into length and can adjust, the lower extreme of perpendicular measuring staff is connected with the weight.
2. The device for measuring the dam body breach geometry in the sink test according to claim 1, wherein the slide block is of a plate-shaped structure, lantern rings are fixedly arranged on both sides of the slide block, each lantern ring is of a rectangular structure and is internally provided with a threaded through hole, the lantern ring fixedly arranged on one side of the slide block is vertically arranged in the threaded through hole, and the vertical measuring rod is in threaded connection with the threaded through hole of the lantern ring; the slider opposite side has set firmly two lantern rings, and the screw thread through-hole level of two lantern rings sets up, and the screw thread through-hole central line coincidence of two lantern rings, and cylindrical guide rail threaded connection is in the screw thread through-hole of these two lantern rings.
3. The device for measuring the dam breach geometry in the sink test according to claim 2, wherein a positioning ring is screwed into each of the two collars on the other side of the slider, and the two positioning rings are respectively located at the ends of the two collars away from each other; the holding ring is including location hollow screw and set nut, the inside hollow through-hole that has the constant diameter of location hollow screw, location hollow screw has two connecting portion, two connecting portion structure as an organic whole, the external screw thread has all been seted up to two connecting portion outward appearances, wherein the external diameter of connecting portion one is less than the external diameter of connecting portion two, the external diameter of connecting portion one equals lantern ring internal thread through-hole internal diameter, the both ends external diameter of connecting portion two varies, the one end that is close to connecting portion one is the main aspects, the one end of keeping away from connecting portion one is the tip, it has the breach to open along its length direction on connecting portion two, the opening size of breach reduces from tip to main aspects in proper order, cylindrical guide stretches into and wears out location hollow screw, set nut twists along the.
4. The device for measuring the dam breach geometry in the sink test according to claim 3, wherein the cylindrical linear guide comprises a cylindrical short guide and a cylindrical long guide, one end of the cylindrical long guide is connected with the roller through a positioning ring, the other end of the cylindrical long guide is a threaded end for connecting the cylindrical short guide, and the threaded end is connected with the cylindrical short guide through a positioning ring; the cylinder short guide rail is hollow, one end of the cylinder short guide rail is connected with the threaded end of the cylinder long guide rail through a positioning ring, and the other end of the cylinder short guide rail is connected with the roller through the positioning ring.
5. The device for measuring the dam breach geometry in the basin test of claim 4, wherein the roller comprises a wheel, a wheel shaft and a wheel cover, one end of the wheel shaft is rigidly connected to the wheel, the other end of the wheel shaft is in threaded connection with the wheel cover, the wheel shaft is located in the hollow positioning screw and can rotate freely, the positioning nut is tightened to shrink the threaded wall at the connection position to limit the roller to roll, and the diameter of the wheel cover is larger than the inner diameter of the hollow positioning screw and smaller than the outer diameter of the first hollow positioning screw.
6. The apparatus as claimed in claim 1, wherein the vertical measuring rod is detachably connected to the measuring hammer at its lower end.
7. The device for measuring the dam breach geometry in the basin test of claim 1, wherein the roller linear guide, the cylindrical linear guide and the vertical measuring rod are made of stainless steel or aluminum alloy and are marked with graduation lines.
8. A dam breach geometric shape measuring method is characterized by comprising the following steps:
1) firstly, roller linear guide rails are parallelly installed on two sides of the top of a water tank, and after a positioning ring, a roller, a cylindrical short guide rail and a cylindrical long guide rail are assembled, the length of the cylindrical linear guide rail is adjusted, and the cylindrical linear guide rail is arranged between the roller linear guide rails;
2) moving the slide block to an XOZ plane where a target point is located along the Y direction, enabling the vertical measuring rod to be in a vertical state through gravity self-locking, screwing positioning rings on the left side and the right side of the slide block, and fixing the position of the vertical measuring rod on the Y axis and the angle between the cylindrical linear guide rail and the vertical measuring rod;
3) moving the cylindrical linear guide rail along the X axis, moving the vertical measuring rod up and down along the Z axis, moving the measuring hammer to the position of a target point A to be measured, and recording the scale mark data of the roller linear guide rail, the cylindrical linear guide rail and the vertical measuring rod, wherein the coordinate of the point A is (X) coordinate1,y1,z1) After a certain process, the measured target point A is moved to A ', and the data is recorded again, namely the coordinate of A' is (x)1′,y1′,z1′)；
4) And repeating the operation to obtain the coordinate change of each characteristic point, and calculating the change process of the geometrical size of the breach.
9. The method as claimed in claim 8, wherein a plurality of cylindrical linear guides are installed between two roller linear guides for simultaneous measurement of a plurality of cross sections.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011092475.XA CN112113481A (en) | 2020-10-13 | 2020-10-13 | Device and method for measuring dam body breach geometric shape in water tank test |
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| CN202011092475.XA CN112113481A (en) | 2020-10-13 | 2020-10-13 | Device and method for measuring dam body breach geometric shape in water tank test |
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| CN202011092475.XA Pending CN112113481A (en) | 2020-10-13 | 2020-10-13 | Device and method for measuring dam body breach geometric shape in water tank test |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112880653A (en) * | 2021-03-16 | 2021-06-01 | 长江勘测规划设计研究有限责任公司 | Dam break model underwater topography continuous measurement device of dam plug body |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112880653A (en) * | 2021-03-16 | 2021-06-01 | 长江勘测规划设计研究有限责任公司 | Dam break model underwater topography continuous measurement device of dam plug body |
| CN112880653B (en) * | 2021-03-16 | 2024-04-12 | 长江勘测规划设计研究有限责任公司 | Continuous measuring device for underwater topography of damming body dam-break model |
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Inventor after: Liu Jin Inventor after: Ma Fei Inventor after: Han Jianjun Inventor after: Liu Yuxuan Inventor after: Su Kunpeng Inventor before: Liu Jin Inventor before: Ma Fei Inventor before: Han Jianjun Inventor before: Liu Yuxuan Inventor before: Su Kunpeng |