Device and method for observing concentration distribution of muddy water body

Abstract

The invention discloses a muddy water body concentration distribution observation device and method, which can accurately observe the muddy water body concentration distribution condition under the dual effects of jet flow slurry making and pipeline suction and discharge based on a muddy water body under the effect of pipeline suction and discharge coupled jet flow slurry making, and comprises a muddy water body diffusion device, an image observation device, a jet flow suction and discharge device and a remeasurement device, the muddy water body diffusion device is used for bearing a muddy water body, the jet flow suction and discharge device is used for preparing the muddy water body in the muddy water body diffusion device, and the image observation device is used for monitoring the muddy water body in the muddy water body diffusion device to generate a muddy water body distribution diagram. And the retesting device is used for carrying out secondary monitoring on the muddy water body in the muddy water body diffusion device and generating a muddy water body distribution diagram.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline dredging and sediment dynamics, and in particular to a device and method for observing the concentration distribution of a turbid water body. Background Art

[0002] There are obvious spatial differences in the siltation of reservoirs in different river basins in my country, with the most prominent problems in the Yellow River Basin and the Northwest region. Some reservoirs are limited by the knowledge at the time of construction, and the planning and design are not perfect. There are no sediment discharge facilities, which makes it impossible to use natural water power to discharge sediment after the reservoir area is silted up. The effective storage capacity of the reservoir is greatly reduced, and the beneficial function cannot be normally exerted. Hydraulic sediment discharge measures cannot be used in this type of reservoir. Even if sediment discharge facilities are set up during construction, most of them are difficult to meet the requirements of sediment discharge.

[0003] Pipeline sand removal is a common desilting method for deepwater reservoirs, such as mud pump pipeline sand removal, pneumatic pump pipeline sand removal, self-priming pipeline sand removal, etc. Pipeline sand removal is to set up an underwater pipeline sand removal system with a mud suction head in the reservoir area to discharge the silt in the reservoir area. The system usually consists of a mud suction head, a water surface control platform, a sand removal pipeline and control equipment. Compared with traditional mechanical desilting measures, the pipeline sand removal system only needs the platform to provide the power for sand extraction and the force for the mud suction head and the sand removal pipeline system to rise and fall. The required operating platform is small in size and the operating water depth range is relatively much larger. Pipeline sand removal is to discharge the silt out of the reservoir together with the water body. The amount of sand discharged depends on the concentration of the turbid water body near the mud suction head. Therefore, in order to improve the efficiency of sand removal, the shaping of high-concentration water body near the mud suction head is the key. From the current status and development trends of research at home and abroad, it can be seen that scholars have carried out many studies on reservoir sand discharge and dredging technology, artificial jet slurry making technology, and the development of high-speed jet scouring pit morphology. However, the existing results are still insufficient to support the design and operation control of pipeline sand discharge systems under the coordination of underwater high-speed jets. Existing research mainly focuses on the changes in the amount of sediment scour by jets, and there is a lack of research on the spatial distribution of high-concentration water bodies generated by the coupling of pipeline suction and discharge and jet slurry making. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a turbid water body concentration distribution observation device and method, which can accurately observe the turbid water body concentration distribution under the dual effects of jet slurrying and pipeline suction and discharge.

[0005] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] A turbid water concentration distribution observation device is based on the turbid water under the action of pipeline suction and discharge coupled jet slurrying, and includes a turbid water diffusion device, an image observation device, a jet suction and discharge device and a re-measurement device; the turbid water diffusion device includes an observation cylinder with a through top, a silt bed is arranged inside the observation cylinder, a water outlet pipe and a water inlet pipe connected to a water injection device are respectively connected to the top circumference, a drain pipe is connected to the bottom circumference, and a drain valve is arranged on the drain pipe; the image observation device includes a plurality of detection modules uniformly arranged inside the observation cylinder along the circumferential direction, the plurality of detection modules are all located above the silt bed and are connected to a controller at the same time; the jet suction and discharge device includes a jet pipe and a plurality of suction and discharge pipes extending into the observation cylinder and located above the silt bed, and the jet pipe is arranged along the axial direction of the observation cylinder; the re-measurement device includes a silt detector, a sampling pipette and a plurality of sample tubes, One end of the sampling straw extends into the observation cylinder, and the other end is detachably connected to the sample tube. The turbid water diffusion device is used to carry the turbid water. The jet suction and discharge device is used to prepare the turbid water in the turbid water diffusion device. The image observation device is used to monitor the turbid water in the turbid water diffusion device to generate a turbid water distribution map. The re-measurement device is used to monitor the turbid water in the turbid water diffusion device for a second time to generate a turbid water distribution map. The present invention compares the turbid water distribution map obtained by the sediment detector with the turbid water distribution map measured by the image observation device in the same time to verify the accuracy of the result. At the same time, by changing the diameter of the jet tube, the jet velocity and flow rate, and the distance between the jet tube and the sediment bed, different turbid water distribution maps are obtained to realize the analysis of the concentration distribution law of the turbid water under the action of pipeline suction and discharge coupled with jet slurrying.

[0007] Preferably, the retest device also includes a sample placement slot, the interior of the sample placement slot is divided into multiple sampling areas by partitions, multiple sample tubes are evenly arranged in the sampling areas, and the top port of the sample placement slot is slidably connected to a cover plate for closing the sampling area, thereby realizing regional storage of turbid water collected in different time periods.

[0008] Preferably, a plurality of suction and discharge pipes are connected to the jet pipe via a sleeve to form a whole, which is convenient for installation.

[0009] Preferably, an end cap is provided at the top end of the observation cylinder, and an assembly hole for arranging a sampling pipette and an adjustment hole for arranging a sleeve are respectively provided on the end cap, and the axis of the adjustment hole is in the same straight line as the axis of the observation cylinder, an adjustment cylinder is screwed into the adjustment hole, the sleeve passes through the adjustment cylinder, and a limit ring is provided at a position at one end of the adjustment cylinder away from the mud and sand bed.

[0010] Preferably, a flow control valve is provided on the water inlet pipe to facilitate the adjustment of the water inlet flow rate.

[0011] Preferably, the detection module includes an underwater camera and a sonar detector.

[0012] Based on the above-mentioned turbid water body concentration distribution observation device, the present invention also discloses a turbid water body concentration distribution observation method, comprising the following steps:

[0013] S1. Close the drain pipe of the observation cylinder through the drain valve, and lay sediment of the same particle size at the bottom to form a sediment bed;

[0014] S2. Slowly inject clean water into the observation cylinder from the water inlet pipe until the water overflows from the water outlet pipe;

[0015] S3, after the sediment in the observation cylinder is completely settled, the water flow rate of the water inlet pipe is adjusted to be greater than the preset flow rate of the suction and discharge pipe;

[0016] S4, injecting a high-speed jet with a certain flow rate into the cylinder to be observed through the jet pipe to create a turbid water body, and at the same time controlling the suction and discharge pipe to pump water so as to achieve the simultaneous action of the jet and the suction and discharge, thereby expanding the distribution space of the turbid water body and facilitating the improvement of the pumping and discharge efficiency of the turbid water;

[0017] S5, injecting the turbid water in the observation cylinder into the sample tube through the sampling pipette at regular intervals, and making a turbid water distribution map through the sediment detector, and at the same time transmitting the data measured by the underwater camera and the sonar detector during the experiment to the controller for analysis and simulation to make a turbid water distribution map;

[0018] S6. Compare the turbid water distribution map obtained by the sediment detector with the turbid water distribution map measured by the underwater camera and sonar detector in the same period of time to verify the accuracy of the results;

[0019] S7. Repeat the above steps S1-S7 by changing the diameter of the jet tube, the jet velocity and flow rate, and the distance between the jet tube and the sediment bed to analyze the concentration distribution law of the turbid water body under the action of pipeline suction and discharge coupled jet slurrying.

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

[0021] 1. The present invention fills the gap in the study of the spatial distribution law of concentration of high-concentration water bodies generated by the coupling of pipeline suction and discharge and jet slurrying, and provides a strong theoretical support for related projects.

[0022] 2. The present invention comprehensively considers the jet flow rate, tube diameter, and distance from the muddy bottom bed of the jet tube, so that the simulated turbid water concentration distribution is closer to the actual turbid water concentration distribution, making the final analysis result of the turbid water concentration distribution law more reliable.

[0023] 3. The image observation device of the present invention combines an underwater camera with sonar, and the captured experimental data and phenomena are more accurate and complete, so that the experimental results can be presented more intuitively and are convenient for analysis.

[0024] 4. Based on the data of the turbid water body distribution map obtained by the image observation device, the present invention uses the set re-measurement device to re-measure the concentration data of the specified position of the turbid water body, and ensures the accuracy of the experimental results by checking the two sets of data. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 It is a schematic diagram of the assembly of the end cover of the present invention;

[0027] Figure 3 It is a schematic structural diagram of the jet suction and discharge device of the present invention.

[0028] Figure symbols: 1. Turbid water diffusion device, 11. Observation cylinder, 12. Mud and sand bottom bed, 13. Outlet pipe, 14. Inlet pipe, 15. Drain pipe, 16. End cover, 161. Assembly hole, 162. Adjustment hole, 17. Flow control valve, 2. Detection module, 3. Jet suction and discharge device, 31. Jet tube, 32. Suction and discharge pipe, 33. Sleeve, 331. Limiting ring, 4. Re-test device, 41. Sample tube, 42. Sampling pipette, 43. Sample placement slot, 431. Partition, 432. Sampling area, 433. Cover plate, 5. Adjustment cylinder. DETAILED DESCRIPTION

[0029] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0030] Example 1

[0031] A turbid water concentration distribution observation device is based on the turbid water under the action of pipeline suction and discharge coupled with jet slurrying, which can accurately observe the concentration distribution of turbid water under the dual action of jet slurrying and pipeline suction and discharge, such as Figure 1 As shown, it includes a turbid water diffusion device 1, an image observation device, a jet suction and discharge device 3 and a re-measurement device 4, wherein the turbid water diffusion device 1 is used to carry turbid water, the jet suction and discharge device 3 is used to prepare turbid water in the turbid water diffusion device 1, the image observation device is used to monitor the turbid water in the turbid water diffusion device and generate a turbid water distribution map, and the re-measurement device 4 is used to perform secondary monitoring of the turbid water in the turbid water diffusion device 1 and generate a turbid water distribution map. When it is specifically implemented, the accuracy of the result can be verified by comparing the turbid water distribution maps obtained by the re-measurement device 4 and the image observation device in the same time;

[0032] The muddy water diffusion device 1 comprises an observation cylinder 11 with a through top, a muddy bottom bed 12 is arranged inside the observation cylinder 11, a water outlet pipe 13 and a water inlet pipe 14 connected to a water injection device are connected to the top circumference, and a water discharge pipe 15 is connected to the bottom circumference, and a water discharge valve is arranged on the water discharge pipe 15;

[0033] The above-mentioned image observation device includes a plurality of detection modules 2 uniformly arranged inside the observation cylinder 11 along the circumferential direction, and the plurality of detection modules 2 are all located above the muddy bed 12 and are simultaneously connected to the controller, wherein the detection module includes an underwater camera and a sonar detector. During the experiment, the underwater camera and the sonar detector detect the data of the turbid water body and transmit it to the controller for analysis and simulation to generate a turbid water body distribution map;

[0034] The structure of the jet suction and discharge device 3 is as follows: Figure 3 As shown, it includes a jet pipe 31 and a plurality of suction and discharge pipes 32 extending into the observation cylinder 11 and located above the muddy bottom bed 12. The jet pipe 31 is arranged along the axial direction of the observation cylinder 11. The observation cylinder 11 is symmetrically distributed, thereby preventing the suction and discharge pipes 32 on only one side from affecting the overall distribution of the turbid water body.

[0035] The above-mentioned re-test device 4 includes a sediment detector, a sampling straw 42 and multiple sample tubes 41. One end of the sampling straw 42 extends into the observation cylinder 11, and the other end is detachably connected to the sample tube 41. During the experiment, the sampling straw 42 transfers the turbid water in the observation cylinder 11 to the sample tube 41, and generates a turbid water distribution map through sediment detector analysis.

[0036] As a preferred embodiment of the above embodiment, the further retest device 4 also includes a sample placement slot 43, the interior of the sample placement slot 43 is divided into multiple sampling areas 432 by a partition 431, and multiple sample tubes 41 are evenly arranged in the sampling area 432. The setting of the sampling area 432 can realize the regional storage of turbid water collected in different time periods, which is convenient for subsequent sediment detectors to detect turbid water. Preferably, the top port of the sample placement slot 43 is slidably connected to a cover plate 433 for closing the sampling area 432 to avoid contamination of the turbid water collected in the sample tube 41 in the sampling area 432.

[0037] As a preferred solution of the above embodiment, a plurality of suction and discharge pipes 32 are connected to the jet pipe 31 through a sleeve 33 to form a whole, so as to facilitate the arrangement of the suction and discharge pipes 32 and the jet pipe 31 .

[0038] As a preferred solution of the above embodiment, an end cap 16 is provided at the top of the observation cylinder 11 to limit the arrangement height of the jet tube 31 and the suction and discharge tube 32. Figure 2As shown, the end cover 16 is provided with an assembly hole 161 for arranging the sampling suction tube 42 and an adjustment hole 162 for arranging the sleeve 33, and the axis of the adjustment hole 162 is on the same straight line as the axis of the observation cylinder 11. The adjustment cylinder 5 is screwed into the adjustment hole 162, the sleeve 33 passes through the adjustment cylinder 5, and a limit ring 331 is provided at the end of the adjustment cylinder 5 away from the mud and sand bottom bed 12. The position of the sleeve 33 can be changed by rotating the adjustment cylinder 5, thereby achieving the purpose of adjusting the arrangement height of the jet tube 31 and the suction and discharge pipe 32.

[0039] Preferably, a flow control valve 17 is provided on the water inlet pipe 14 , and the arrangement of the control valve 17 facilitates the control of the water inlet flow of the observation cylinder 11 .

[0040] Example 2

[0041] This embodiment provides a method for observing the concentration distribution of a turbid water body, based on the above-mentioned turbid water body concentration distribution observation device, comprising the following steps:

[0042] S1, close the drain pipe 15 of the observation cylinder 11 through the drain valve, and lay mud with the same particle size at the bottom to form a mud bed 12;

[0043] S2, slowly inject clean water into the observation cylinder 11 from the water inlet pipe 14 until the water flows out from the water outlet pipe 13;

[0044] S3, after the sediment in the observation cylinder 11 is completely settled, the water inlet flow rate of the water inlet pipe 14 is adjusted to be greater than the preset flow rate of the suction and discharge pipe 32;

[0045] S4, injecting a high-speed jet with a certain flow rate into the cylinder to be observed 11 through the jet pipe 31 to create a turbid water body, and at the same time controlling the suction and discharge pipe 32 to pump water so as to achieve the simultaneous action of the jet and the suction and discharge, thereby expanding the distribution space of the turbid water body and facilitating the improvement of the pumping and discharge efficiency of the turbid water;

[0046] S5, injecting the muddy water in the observation cylinder 11 into the sample tube 41 through the sampling pipette 42 at regular intervals, and making a muddy water distribution map through the sediment detector, and at the same time transmitting the data measured by the underwater camera and the sonar detector during the experiment to the controller for analysis and simulation to make a muddy water distribution map;

[0047] S6. Compare the turbid water distribution map obtained by the sediment detector with the turbid water distribution map measured by the underwater camera and sonar detector in the same period of time to verify the accuracy of the results;

[0048] S7, by changing the diameter of the jet tube 31, the jet velocity and flow rate, and the distance between the jet tube 31 and the sediment bed 12, repeat the above steps S1-S7 to analyze the concentration distribution law of the turbid water body under the action of pipeline suction and discharge coupled jet slurrying.

[0049] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field may make various corresponding changes and modifications based on the present invention, but these corresponding changes and modifications should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A device for observing the concentration distribution of turbid water. It is characterized in that A turbid water body based on pipeline suction and discharge coupled with jet slurrying, comprising a turbid water body diffusion device (1), an image observation device, a jet suction and discharge device (3) and a re-measurement device (4); The muddy water diffusion device (1) comprises an observation cylinder (11) with a through top, a muddy sand bed (12) is provided inside the observation cylinder (11), a water outlet pipe (13) and a water inlet pipe (14) connected to a water injection device are respectively connected to the top peripheral side, and a water discharge pipe (15) is connected to the bottom peripheral side, and a water discharge valve is provided on the water discharge pipe (15); The image observation device comprises a plurality of detection modules (2) uniformly arranged along a circumferential direction inside an observation cylinder (11), wherein the plurality of detection modules (2) are all located above a sediment bed (12) and are simultaneously connected to a controller; The jet suction and discharge device (3) comprises a jet pipe (31) extending into the observation cylinder (11) and located above the mud and sand bottom bed (12) and a plurality of suction and discharge pipes (32), wherein the jet pipe (31) is arranged along the axial direction of the observation cylinder (11); The retest device (4) comprises a sediment detector, a sampling pipette (42) and a plurality of sample tubes (41); one end of the sampling pipette (42) extends into the observation cylinder (11), and the other end is detachably connected to the sample tube (41).

2. The turbid water concentration distribution observation device according to claim 1, It is characterized in that The retest device (4) further comprises a sample placement slot (43), the interior of the sample placement slot (43) being divided into a plurality of sampling areas (432) by a partition (431), a plurality of sample tubes (41) being evenly arranged in the sampling areas (432), and a cover plate (433) for closing the sampling areas (432) being slidably connected to a top port of the sample placement slot (43).

3. The turbid water concentration distribution observation device according to claim 2, It is characterized in that The plurality of suction and discharge pipes (32) are connected to the jet pipe (31) via a sleeve (33) to form a whole.

4. The turbid water concentration distribution observation device according to claim 3, It is characterized in that The top end of the observation cylinder (11) is provided with an end cap (16), and the end cap (16) is provided with an assembly hole (161) for arranging the sampling pipette (42) to pass through and an adjustment hole (162) for arranging the sleeve (33), and the axis of the adjustment hole (162) is on the same straight line as the axis of the observation cylinder (11), an adjustment sleeve (5) is screwed into the adjustment hole (162), the sleeve (33) passes through the adjustment sleeve (5), and a limit ring (331) is provided at a portion of the adjustment sleeve (5) at one end away from the mud and sand bottom bed (12).

5. The pipeline turbid water concentration distribution observation device according to claim 1, It is characterized in that The water inlet pipe (14) is provided with a flow control valve (17).

6. The turbid water concentration distribution observation device according to claim 1, It is characterized in that The detection module (21) comprises an underwater camera and a sonar detector.

7. A method for observing the concentration distribution of turbid water. It is characterized in that The turbid water concentration distribution observation device according to any one of claims 1 to 6 comprises the following steps: S1, closing the drain pipe (15) of the observation cylinder (11) through the drain valve, and laying mud and sand of the same particle size at the bottom to form a mud and sand bed (12); S2. Slowly inject clean water from the water inlet pipe (14) into the observation cylinder (11) until the water flows out from the water outlet pipe (13); S3, after the sediment in the observation cylinder (11) is completely settled, the water inlet flow rate of the water inlet pipe (14) is adjusted to be greater than the preset flow rate of the suction and discharge pipe (32); S4, injecting a high-speed jet with a certain flow rate into the cylinder (11) to be observed through the jet pipe (31) to create a turbid water body, and at the same time controlling the suction and discharge pipe (32) to pump water; S5, injecting the muddy water in the observation cylinder (11) into the sample tube (41) through the sampling pipette (42) at regular intervals, and making a muddy water distribution map through the sediment detector, and at the same time transmitting the data measured by the underwater camera and the sonar detector during the experiment to the controller for analysis and simulation to make a muddy water distribution map; S6. Compare the turbid water distribution map obtained by the sediment detector with the turbid water distribution map measured by the underwater camera and sonar detector in the same period of time to verify the accuracy of the results; S7, by changing the diameter of the jet tube (31), the jet velocity and flow rate, and the distance between the jet tube (31) and the sediment bed (12), the above steps S1-S7 are repeated to analyze the concentration distribution law of the turbid water body under the action of pipeline suction and discharge coupled jet slurrying.

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