CN109781354B - Dam body seepage underwater detection system based on velocity of flow response - Google Patents
Dam body seepage underwater detection system based on velocity of flow response Download PDFInfo
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- CN109781354B CN109781354B CN201910071422.0A CN201910071422A CN109781354B CN 109781354 B CN109781354 B CN 109781354B CN 201910071422 A CN201910071422 A CN 201910071422A CN 109781354 B CN109781354 B CN 109781354B
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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
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P13/00—Indicating or recording presence, absence, or direction, of movement
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P5/00—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft
- G01P5/14—Measuring speed of fluids, e.g. of air stream; Measuring speed of bodies relative to fluids, e.g. of ship, of aircraft by measuring differences of pressure in the fluid
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Abstract
The invention relates to a dam body leakage underwater detection system based on flow velocity induction, which comprises a mobile platform, a flow velocity induction device, a traction device and a positioning device, wherein the mobile platform is provided with a water inlet and a water outlet; the flow velocity sensing device and the positioning device are arranged on the mobile platform, and the traction device controls the mobile platform to move on the surface of the dam concrete panel; the flow velocity sensing device senses pressure change caused by water flow and transmits the position of a leakage point through the positioning device. The system of the invention realizes the rapid, high-efficiency and low-cost detection of the underwater leakage of the concrete face rockfill dam face through the movement of the mobile platform and the pressure induction of the flow velocity induction device.
Description
Technical Field
The invention relates to the field of detection equipment, in particular to a dam body leakage underwater detection system based on flow velocity induction.
Background
The concrete face rockfill dam is used as a main dam type and is widely applied to hydraulic and hydroelectric engineering, and the safety of the concrete face rockfill dam is directly determined by the safety of the concrete face rockfill dam as an important component of a dam body seepage-proofing system. The seepage-proof face plate, face plate seams and peripheral seams of the concrete face rockfill dam are easy to be locally damaged to cause seepage under the influence of dam construction quality, earthquake load and the like, and if the seepage-proof face plate, the face plate seams and the peripheral seams are not processed in time, fine particles in a back cushion layer and a transition layer of the face plate are taken away by seepage water, so that the working state of the face plate is further degraded, the dam body is seriously collapsed, and irreparable loss is caused.
For the concrete panel leakage site, all occur below the water level line, the detection difficulty of the leakage point is higher, the current effective method is an isotope tracing method, and the method has certain pollution to the water body because of the adopted radioactive isotope. The conventional method is to empty the reservoir to expose the panel for manual detection, and the method is very effective, but can cause huge waste of water resources and bring huge economic loss. Therefore, it is very important to find a simple and efficient underwater leakage detection means.
Disclosure of Invention
The invention aims to provide a dam body leakage underwater detection system which is simple and efficient. And the underwater leakage detection of the concrete-faced rockfill dam is realized.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
a dam body leakage underwater detection system based on flow velocity induction comprises a mobile platform, a flow velocity induction device, a traction device and a positioning device; the flow velocity sensing device and the positioning device are arranged on the mobile platform, and the traction device controls the mobile platform to move on the surface of the dam concrete panel; the flow velocity sensing device senses pressure change caused by water flow and transmits the position of a leakage point through the positioning device.
As a further improvement of the invention, the flow velocity sensing device is an up-down through device, and the edge of the bottom of the flow velocity sensing device is made of flexible rubber; and a pressure sensing film or a propeller is arranged at an opening at the upper part of the flow velocity sensing device. The edge of the bottom of the flow velocity sensing device is made of flexible rubber materials, so that the lower part of the flow velocity sensing device is fully attached to the dam body, and the opening of the lower part of the flow velocity sensing device is sealed. The flow rate sensing device detects leakage by sensing pressure changes caused by water flow. The sensor can adopt a pressure sensing film or a propeller, the pressure sensing film arranged in the flow velocity sensing device is arranged at the position of the upper section, so that water can freely enter and exit, and the pressure nozzle can conveniently replace turbid water in the flow velocity sensing device by water injection when cleaning equipment is subsequently arranged; the smaller upper section design can also ensure that the replaced water body keeps good transparency, and reduce the exchange of the clean water body and the turbid reservoir water after replacement. The propeller is adopted for pressure detection, the propeller can be driven to rotate through water flow, the change of the water flow is sensed, whether the dam body leaks or not is determined, and the dam body leakage speed is determined by establishing the relation between the propeller rotating speed and the fluid speed. Preferably adopt the forced induction membrane to carry out pressure detection, under the panel does not have the seepage condition, both ends anhydrous flow about the velocity of flow induction system, and the forced induction membrane does not have pressure signal this moment, and when moving platform walked to the seepage point, because the inside water fluid that appears of velocity of flow induction system, the forced induction membrane sensed pressure change, can confirm the seepage place.
As a further improvement of the invention, the lower opening of the flow velocity sensing device is a rectangular section, and the width of the rectangular section is 1/3 panel width; the opening at the upper part is a circular section; the rectangular cross-sectional area is much larger than the circular cross-sectional area. The cross-sectional area of the lower opening of the flow velocity sensing device is far larger than that of the upper opening, so that sensitive detection is realized for the small leakage of the dam body.
As a further improvement of the invention, the device also comprises a guide rail; the guide rail is vertically fixed on the movable platform; the flow velocity sensing device is connected with the guide rail through the connecting rod and slides along the direction of the guide rail. When setting up the guide rail, sense pressure variation when velocity of flow induction system, the control velocity of flow induction system moves down along the guide rail for the flexible rubber base and the laminating of panel surface of velocity of flow induction system bottom compress tightly, seal velocity of flow induction system lower extreme, and the seepage speed can further be confirmed to the pressure value through the pressure sensing membrane.
As a further improvement of the invention, the device also comprises a high-pressure cleaning device, wherein the high-pressure cleaning device is arranged in the flow velocity sensing device and comprises a pressure nozzle, a pressure nozzle walking guide rail and a driving device. Through the drive of drive arrangement for pressure nozzle moves along walking guide rail, washs the panel and replaces the evacuation of the inside muddy water body of flow velocity induction system. Furthermore, still include camera device, camera device installs in the pressure shower nozzle side, including camera and lighting device. After the turbid water is drained and replaced, the driving device drives the camera device to gradually travel along the traveling guide rail, the dam face condition is shot in real time, and the dam face image of the leakage point is obtained. The acquired images can be transmitted to the control host computer in a wireless communication mode to form the image-text information of the specific position distribution of the underwater leakage point of the panel.
As a further improvement of the invention, the mobile platform consists of a driving device, a crawler belt, a driving wheel, a driven wheel and an equipment carrying platform; the equipment carrying platform is arranged on the crawler belt, and the driving device controls the driven wheel and the driving wheel to rotate to drive the crawler belt to rotate so as to move the equipment.
As a further improvement of the invention, the traction device comprises a winch and a traction cable; the traction steel cable is connected to the mobile platform, and the equipment is controlled to reciprocate up and down along the dam face through the self-driving force of the mobile platform and the traction of the winch.
As a further improvement of the invention, an electromagnet is arranged at the bottom of the mobile platform. In the walking process, the electromagnet is made to have magnetism by inputting current, and steel bars in reinforced concrete are adsorbed, so that equipment can be better adsorbed on the panel; meanwhile, the design can realize leakage detection of the vertical surface of the concrete gravity dam and the chamfer surface of the arch dam, and the application range of the equipment is greatly improved.
As a further improvement of the invention, the front end of the mobile platform can be provided with a plurality of high-pressure cleaning nozzles for preliminarily cleaning the sediments on the surface of the dam body and ensuring the normal running of the equipment;
the system of the invention realizes the rapid, high-efficiency and low-cost detection of the underwater leakage of the concrete face rockfill dam face through the movement of the mobile platform and the pressure induction of the flow velocity induction device. In addition, the specific characteristics of the underwater leakage point of the panel can be acquired by combining an underwater high-pressure cleaning device and an underwater camera device.
Drawings
FIG. 1 is a schematic diagram of the apparatus of the present invention;
the system comprises a pressure sensing film 1, a flow rate sensing device 2, a connecting rod 3, a guide rail 4, a positioning device 5, an equipment carrying platform 6, a driving wheel 7, a driven wheel 8, a crawler belt 9, an inductor posture control motor 10, a winch 11, a traction steel cable 12, a flexible rubber bottom edge 13, a sliding rail joint 14, a pressure nozzle walking guide rail 15, a pressure nozzle 16, a hydraulic pump 17 and a high-pressure water flexible pipeline 18.
Detailed Description
The technical solution of the present invention is further explained below with reference to the embodiment and the accompanying drawings.
Example 1
The system shown in fig. 1 comprises a moving platform, a flow velocity sensing device 2, a traction device, a guide rail 4 and a positioning device 5;
the moving platform consists of a driving device, a crawler belt 9, a driving wheel 7, a driven wheel 8 and an equipment carrying platform 6; the equipment stage 6 is provided on the crawler belt 9.
The flow velocity sensing device 2 and the positioning device 5 are arranged on the equipment carrying platform 6; the guide rail 4 is vertically fixed on the equipment carrying platform 6; the flow velocity sensing device 2 is connected with the guide rail 4 through the connecting rod 3 and slides along the direction of the guide rail 4. The flow velocity induction device 2 is a vertical through device, and the edge of the bottom of the flow velocity induction device 2 is made of a flexible rubber material 13; the opening at the upper part of the flow velocity sensing device 2 is provided with a pressure sensing film 1. The lower opening of the flow velocity induction device 2 is a rectangular section, the width of the rectangular section is 1/3 panel width according to the panel width in the actual engineering, and the length direction is 2 m; the upper opening has a circular cross section, and the diameter of the circular opening is 20cm, so that the area of the rectangular cross section is far larger than that of the circular cross section.
The traction device comprises a winch 11 and a traction steel cable 12; the traction steel cable 12 is connected to the mobile platform, and controls the equipment to reciprocate up and down along the dam surface through the self-driving force of the mobile platform and the traction of the winch 11.
Fixing a winch 11 at one side of a dam top panel, placing system equipment on the panel, releasing a traction steel cable 12 through the winch 11, moving downwards along the panel to enter a water body under the self-weight action of the system equipment, wherein a small gap is formed between the bottom of a flow velocity sensing device 2 and the surface of the panel, no water flows at the upper end and the lower end of the flow velocity sensing device 2 under the condition that the panel has no leakage, a pressure sensing film 1 has no pressure signal, when the equipment travels to a leakage point, water body fluid appears in the flow velocity sensing device 2, the pressure sensing film 1 senses pressure change, at the moment, closing the winch 11 to enable the equipment to be static, controlling the flow velocity sensing device 2 to move downwards along a control guide rail 4 through a posture control motor 10 of the flow velocity sensing device 2, enabling a bottom flexible rubber bottom edge 13 of a shell 2 of the flow velocity sensing device 2 to be attached to and pressed with the surface of the, the leakage speed at the position is determined through the pressure value of the pressure sensing film 1, and the coordinate position of the leakage point is recorded and transmitted through the positioning device 5, so that convenience is brought to subsequent repair.
Example 2
The embodiment is different from the embodiment 1 only in that the high-pressure cleaning device and the camera device are further included, and the high-pressure cleaning device is arranged inside the flow velocity sensing device 2 and comprises a pressure nozzle 16, a pressure nozzle walking guide rail 15 and a driving device. The camera device is arranged on the side surface of the pressure nozzle 16 and comprises a camera and an illuminating device.
Fixing a winch 11 at one side of a dam top panel, placing system equipment on the panel, releasing a traction steel cable 12 through the winch 11, moving downwards along the panel to enter a water body under the self-weight action of the system equipment, wherein a small gap is formed between the bottom of a flow velocity sensing device 2 and the surface of the panel, no water flows at the upper end and the lower end of the flow velocity sensing device 2 under the condition that the panel has no leakage, a pressure sensing film 1 has no pressure signal, when the equipment travels to a leakage point, water body fluid appears in the flow velocity sensing device 2, the pressure sensing film 1 senses pressure change, at the moment, closing the winch 11 to enable the equipment to be static, controlling the flow velocity sensing device 2 to move downwards along a control guide rail 4 through a posture control motor 10 of the flow velocity sensing device 2, enabling a bottom flexible rubber bottom edge 13 of a shell 2 of the flow velocity sensing device 2 to be attached to and pressed with the surface of the, the seepage speed is determined by the pressure value of the pressure sensing film 1, and meanwhile, the pressure nozzle 16 is controlled to travel along the pressure nozzle travel guide rail 15 by a control motor arranged at the position of the pressure nozzle 16, simultaneously, the hydraulic pump 17 is opened, clean high-pressure water is sprayed to the panel surface through the high-pressure water flexible pipeline 18 and the pressure nozzle 16, cleaning the deposit attached on the panel, and replacing the turbid water out of the flow velocity induction device 2, so that the water body in the flow velocity induction device 2 has good transparency, the high-definition underwater camera and the lighting device arranged on the pressure nozzle 16 are combined to shoot the surface leakage condition of the panel, the signal is transmitted to the receiving end through the signal cable, the detection and the recording of the surface leakage condition of the panel are completed, meanwhile, the coordinate position of the leakage point is recorded and transmitted through the positioning device 5, so that convenience is brought to subsequent repair.
Example 3
The difference between the embodiment and the embodiment 1 is that a propeller is arranged at the upper section position of the flow rate sensing device, the propeller is driven by water flow to rotate, the change of the water flow is sensed, whether the dam body leaks or not is determined, and the dam body leakage speed is determined by establishing the relationship between the rotating speed of the propeller and the fluid speed.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and it will be appreciated by those skilled in the art that various modifications may be made to the embodiments described above, or equivalent arrangements may be made to replace some of the features of the present invention without departing from the spirit and the scope of the present invention.
Claims (8)
1. A dam body seepage underwater detection system based on flow velocity induction is characterized by comprising a mobile platform, a flow velocity induction device, a traction device, a guide rail and a positioning device;
the flow velocity sensing device and the positioning device are arranged on the mobile platform, and the traction device controls the mobile platform to move on the surface of the dam concrete panel; the flow velocity sensing device senses pressure change caused by water flow and transmits the position of a leakage point through the positioning device;
the flow velocity induction device is an up-down through device, an opening at the lower part of the flow velocity induction device is a rectangular section, and the width of the rectangular section is 1/3 panel width; the opening at the upper part is a circular section; the area of the rectangular cross section is far larger than that of the circular cross section; the edge of the bottom of the flow velocity sensing device is made of flexible rubber; a pressure sensing film or a propeller is arranged at an opening at the upper part of the flow velocity sensing device;
the guide rail is vertically fixed on the movable platform; the flow velocity sensing device is connected with the guide rail through a connecting rod and slides along the direction of the guide rail; when the flow velocity sensing device senses pressure change, the flow velocity sensing device is controlled to move downwards along the guide rail, so that the flexible rubber bottom edge at the bottom of the flow velocity sensing device is attached to the surface of the panel and is pressed tightly, and the lower end of the flow velocity sensing device is sealed.
2. The dam leakage underwater detection system based on flow velocity sensing is characterized in that a pressure sensing film is arranged at an upper opening of the flow velocity sensing device.
3. The dam leakage underwater detection system based on flow velocity sensing is characterized by further comprising a high-pressure cleaning device, wherein the high-pressure cleaning device is arranged inside the flow velocity sensing device and comprises a pressure nozzle, a pressure nozzle walking guide rail and a driving device.
4. The dam leakage underwater detection system based on flow rate sensing is characterized by further comprising a camera device, wherein the camera device is installed on the side face of the pressure nozzle and comprises a camera and an illuminating device.
5. The dam leakage underwater detection system based on flow velocity sensing as recited in claim 1, wherein the mobile platform is composed of a driving device, a caterpillar track, a driving wheel, a driven wheel and an equipment carrying platform; the equipment carrying platform is arranged on the crawler belt, and the driving device controls the driven wheel and the driving wheel to rotate to drive the crawler belt to rotate so as to move the equipment.
6. The dam leakage underwater detection system based on flow rate sensing of claim 1, wherein the traction device comprises a winch and a traction cable; the traction steel cable is connected to the mobile platform, and the equipment is controlled to reciprocate up and down along the dam face through the self-driving force of the mobile platform and the traction of the winch.
7. The dam leakage underwater detection system based on flow velocity sensing is characterized in that an electromagnet is arranged at the bottom of the mobile platform.
8. The dam leakage underwater detection system based on flow velocity sensing as recited in claim 1, wherein the front end of the mobile platform is provided with a high pressure cleaning nozzle.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810298602 | 2018-04-04 | ||
| CN2018102986028 | 2018-04-04 |
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| CN109781354A CN109781354A (en) | 2019-05-21 |
| CN109781354B true CN109781354B (en) | 2021-04-23 |
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| CN201910071422.0A Active CN109781354B (en) | 2018-04-04 | 2019-01-25 | Dam body seepage underwater detection system based on velocity of flow response |
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| WO (1) | WO2019192265A1 (en) |
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| CN111122053B (en) * | 2020-01-03 | 2021-05-11 | 水利部交通运输部国家能源局南京水利科学研究院 | Device and method for detecting early unstable leakage of small reservoir dam body |
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| CN109781354A (en) | 2019-05-21 |
| WO2019192265A1 (en) | 2019-10-10 |
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