CN208860640U - A kind of suspended load sampler for flume test - Google Patents
A kind of suspended load sampler for flume test Download PDFInfo
- Publication number
- CN208860640U CN208860640U CN201821587881.1U CN201821587881U CN208860640U CN 208860640 U CN208860640 U CN 208860640U CN 201821587881 U CN201821587881 U CN 201821587881U CN 208860640 U CN208860640 U CN 208860640U
- Authority
- CN
- China
- Prior art keywords
- connect
- probe tube
- sampling
- water pump
- driving motor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Sampling And Sample Adjustment (AREA)
Abstract
The utility model discloses a kind of suspended load samplers for flume test, belong to suspended load sampling technique field.The device includes: elevating mechanism, sampling mechanism and the controller communicated to connect respectively with elevating mechanism and sampling mechanism；Elevating mechanism includes driving motor, screw-threaded shaft elevator and connecting plate, and the power output shaft of driving motor is connect with screw-threaded shaft elevator, and the bottom end of elevating lever is connect with connecting plate；Sampling mechanism includes that probe tube, connection hose, water pump and frequency converter, probe tube are fixed on connecting plate, and the water outlet of probe tube is mounted on connection hose with hose connection, water pump is connect, and frequency converter and water pump communicate to connect；Controller is communicated to connect with driving motor and frequency converter respectively.The utility model can make the flow velocity into sampler equal with the sampling flow velocity on periphery, avoid due to entering inside sampler sampling deviation caused by flow velocity and periphery flow velocity are inconsistent, to improve precision and reliability that suspended load samples.
Description
Technical field
The utility model relates to suspended load sampling technique fields, and in particular to a kind of suspended load sampling for flume test
Device.
Background technique
A variety of method for automatic measurement, including photoelectric method, ultrasonic wave are had been developed to the measurement of suspended load silt content at present
Method, laser method etc., but most direct, most accurate, most reliable method be still to silt carrying flow sample, then to institute's water sampling into
Row filtering weighing, institute's water sampling obtain silt content with the method that specific gravity bottle is weighed.
Relative to prototype measurement, in silt flume test and model test, it is often necessary to suspended sediment is sampled,
Existing sampling method is to protrude into water flow using probe tube, rubber or plastic flexible pipe are connected probe tube, using siphon or is drawn water
Method takes out silt carrying flow, is analyzed to obtain silt content to taken arsenicbearing gold ores sample.Concrete mode is to generally use L-type to take
Sample pipe, bottom face water (flow) direction, top connect hose, then water flow are sucked out, and usual sink height is greater than ground level, therefore
Sediment load sampling silt carrying flow can be sucked out by way of siphon.
However, flow of the conventional method when water flow is sucked out is generally difficult to control, fast speed is such as sucked out, probe tube
Speed is greater than the movement velocity of its periphery water flow field, it is likely that sucks the sand grain in other regions, measurement is caused to tie
Fruit is bigger than normal；When suction speed is slower, the flow velocity in probe tube is less than local flow rate of water flow, it is likely that cannot flow through all
The sand grain in tubule region sucks tubule, and sampling silt content is caused to be less than taken silt content.Therefore, only when in probe tube
When flow velocity is exactly equal to periphery flow field, it is smaller just to can guarantee that sampling stream field influences, does not influence the sampling of silt content.And tradition takes
Quadrat method is difficult accurately to control the flow velocity in sucking probe tube by siphon.
Utility model content
The purpose of this utility model is to provide a kind of suspended load samplers for flume test, to solve existing take
Quadrat method silt carrying flow flow is difficult to control, causes the problem of measurement inaccuracy.
The technical solution that the utility model solves above-mentioned technical problem is as follows:
A kind of suspended load sampler for flume test, comprising: elevating mechanism, sampling mechanism and respectively with lifting
The controller of mechanism and sampling mechanism communication connection；
Elevating mechanism includes driving motor, screw-threaded shaft elevator and connecting plate, the power output shaft and lead screw liter of driving motor
The connection of drop machine, to drive the elevating lever of screw-threaded shaft elevator to move up and down, the bottom end of elevating lever is connect with connecting plate；
Sampling mechanism includes that probe tube, connection hose, water pump and frequency converter, probe tube are fixed on connecting plate, probe tube
Water outlet with connect hose connection, water pump be mounted on connection hose on, the signal output end of frequency converter and the signal of water pump are defeated
Enter end connection；
The signal output end of controller is connect with the signal input part of driving motor and frequency converter respectively, the controller control
The driving motor is made to adjust the position of probe tube, the controller sends frequency signal to the frequency converter to control water pump
Flow.
Further, in the utility model preferred embodiment, above-mentioned probe tube is stainless steel tube or copper pipe.
Further, in the utility model preferred embodiment, above-mentioned water pump is and the pipeline that connect hose and match
Pump.
The utility model has the following beneficial effects:
The utility model enters the flow of probe tube by controller control, makes flow velocity and sampling periphery into sampler
Flow velocity it is equal, avoid due to enter sampler inside flow velocity and periphery flow velocity it is inconsistent caused by sampling deviation, thus
Improve the precision and reliability of suspended load sampling.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the suspended load sampler of the utility model embodiment；
Fig. 2 is the working principle block diagram of the suspended load sampler of the utility model embodiment.
In figure: 100- suspended load sampler；101- driving motor；102- elevating lever；103- connecting plate；104- sampling
Pipe；105- connection hose；106- water pump；107- frequency converter；108- controller；109- screw-threaded shaft elevator.
Specific embodiment
The principles of the present invention and feature are described below in conjunction with attached drawing, example is served only for explaining that this is practical
It is novel, it is not intended to limit the scope of the utility model.
Embodiment
Please refer to Fig. 1, the suspended load sampler 100 for flume test of the present embodiment, comprising: elevating mechanism takes
Model machine structure and the controller 108 communicated to connect respectively with elevating mechanism and sampling mechanism.
Fig. 1 is please referred to, elevating mechanism includes driving motor 101, screw lift 109 and connecting plate 103.Lead screw lifting
The shaft (not shown) and driving motor 101 of machine 109 export axis connection.When driving motor 101, which rotates, drives shaft rotation, silk
The elevating lever 102 (also referred to as lead screw) of thick stick elevator 109 moves up and down.The bottom end of elevating lever 102 and connecting plate 103 connect
It connects, to move up and down together under the effect of driving motor 101, adjusts the position of probe tube 104 on connecting plate 103.Driving electricity
Machine 101 drives elevator, rises or falls elevating lever 102 in the sink, will be fixed on the connecting plate of 102 bottom end of elevating lever
103 are transported to corresponding sample position, are sampled so that probe tube 104 is transported to corresponding position.The biography of elevating mechanism
Flowing mode can also can also be driven using the kind of drive of gear, rack gear by the way of electric pushrod.This is practical new
The elevating mechanism of type embodiment can using in the prior art other the transmission mechanism of elevating function may be implemented.
Fig. 1 is please referred to, sampling mechanism includes probe tube 104, connection hose 105, water pump 106 and frequency converter 107.Probe tube
104 are fixed on connecting plate 103, and the water outlet of probe tube 104 is connected with hose 105 is connect, and it is soft that water pump 106 is mounted on connection
On pipe 105, frequency converter 107 and water pump 106 are communicated to connect.Preferably, probe tube 104 is stainless steel tube or copper pipe.Preferably, water
Pump 106 for the pipeline pump that connect hose 105 and match.The outlet end for connecting hose 105 is sampling outlet.
Fig. 1 is please referred to, the signal output end of controller 108 is defeated with the signal of driving motor 101 and frequency converter 107 respectively
Enter end connection, controller 108 controls driving motor 101 to adjust the position of probe tube 104, and controller 108 is sent out to frequency converter 107
Frequency signal is sent to control the flow of water pump 106.The controller 108 of the present embodiment is preferably computer, is also possible to other controls
Device processed, such as single-chip microcontroller can be model STM32F103 series monolithic.
It is illustrated below with reference to work process of the Fig. 2 to the utility model suspended load sampler 100.
Before suspended load sampler 100 is sampled work, 106 revolving speed of water pump and 106 flow of water pump need to be determined
Corresponding relationship, since 106 revolving speed of water pump is controlled by frequency converter 107, hence, it can be determined that between 106 flow of frequency and water pump
Relationship.Detailed process is as follows:
Different frequency data are sent to frequency converter 107 by controller 108, control water pump 106 obtains revolving speed, then root
The flow for entering water pump 106 under corresponding revolving speed is determined according to different rotating speeds.Pass through controller 108 again for stream corresponding under different frequency
Amount carries out data fitting, obtains the quantitative corresponding relationship of frequency and flow.In specific embodiment, only it need to determine that frequency can be obtained
Corresponding flow, conversely, flow determination can be obtained corresponding frequency.
After determining the corresponding relationship of 106 flow of water pump and frequency, entire sampling work is completed by following procedure:
It being rotated as shown in Fig. 2, controller 108 controls driving motor 101, driving motor 101 drives elevating lever 102 to move,
The probe tube 104 for being connected to 102 bottom of elevating lever is transported to specified sample position.According to the location of probe tube 104
Test parameters known to height and flume test is (for example, drag velocity, the flow dynamic coefficient of viscosity, acceleration of gravity, water surface slope
Degree etc.) calculate the flow velocity (actual flow velocity in sink) of water flow under the height and position.It is calculated by calculated current meter
Under the flow velocity, into the theoretical water flow of probe tube 104.According to the corresponding relationship of good flow and frequency determined above, control
Device 108 obtains corresponding frequency under theoretical water flow, and controller 108 controls frequency converter 107 according to the frequency values and adjusts water pump 106
Section obtains the water flow into probe tube 104 to obtain the flow rate of water flow into probe tube 104 to the revolving speed under respective frequencies
Amount completes sampling process.
Since the flow rate of water flow is obtained by actual flow velocity determination, thus it is guaranteed that into probe tube 104
Flow rate of water flow is equal with actual flow velocity, avoid due to enter sampler inside flow velocity and periphery flow velocity it is inconsistent caused by take
Sample deviation, to improve the precision and reliability of suspended load sampling.
The suspended load sampling method for flume test of the present embodiment, using above-mentioned suspended load sampler 100 into
Row sampling comprising step in detail below:
(1) before sampling, frequency data is sent to frequency converter 107 by controller 108 and control the revolving speed of water pump 106 simultaneously
It determines the flow for entering water pump 106 under corresponding revolving speed, flow corresponding under different frequency is carried out by Linear Quasi by controller 108
It closes, obtains the corresponding relationship of frequency and flow；
(2) it is run by the driving motor 101 that controller 108 controls elevating mechanism, utilizes what is connect with driving motor 101
Probe tube 104 is delivered to the sample position specified in sink by elevating lever 102, and sampling position is highly determined according to locating for sample position
The actual flow velocity set determines the flow for entering probe tube 104 according to actual flow velocity；
(4) flow that the corresponding relationship of the frequency and flow obtained according to step (1) and step (3) obtain determines water pump
Frequency needed for 106 sends obtained frequency data to frequency converter 107 by controller 108 and controls 106 revolving speed of water pump, so that
The flow rate of water flow for entering probe tube 104 under the effect of water pump 106 is equal with the actual flow velocity that step (2) obtains.
The utility model calculates the flow rate of water flow at its position using the locating height of probe tube 104, then according to the flow velocity
The flow for entering probe tube 104 is controlled, so that into the flow velocity of flow rate of water flow and its periphery flow field in probe tube 104
It is consistent, so that disturbance of the device intervention to water flow is down-sampled, so that it is husky to obtain more acurrate, more reliable suspended load sampling
Sample.
In step (1), the quantitative corresponding relationship of frequency and flow are as follows:
Q=anxn+an-1xn-1+……+a1x+a0,
In formula, q is pump capacity, and x is frequency converter frequency, a0、a1、……anFor fitting parameter, pass through frequency converter frequency number
It is determined according to being fitted with measured discharge data；
Wherein, pump capacity q is determined by the volume v of outflow water in unit time t, i.e. q=v/t.
In step (2), the actual flow velocity U of sample position is calculated according to formula (I):
In formula: u*: drag velocity, y: sampling tube hub line is away from bed bottom distance, and ν: the flow dynamic coefficient of viscosity, g: gravity adds
Speed, H: the depth of water, J: water surface slope；
The flow q entered in probe tube 104 is calculated according to formula (II):
In formula: U: the actual flow velocity of sample position, d: sampling pipe diameter.
It should be noted that the utility model uses the calculating of hydraulically smooth surface logarithm velocity distribution formula specific when calculating flow velocity
Flow velocity at height；When boundary condition changes, other substitution formula can be used and calculate.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, all practical at this
Within novel spirit and principle, any modification, equivalent replacement, improvement and so on should be included in the guarantor of the utility model
Within the scope of shield.
Claims (3)
1. a kind of suspended load sampler for flume test characterized by comprising elevating mechanism, sampling mechanism and
The controller communicated to connect respectively with the elevating mechanism and the sampling mechanism；
The elevating mechanism includes driving motor, screw-threaded shaft elevator and connecting plate, the power output shaft of the driving motor and institute
State screw-threaded shaft elevator connection, to drive the elevating lever of the screw-threaded shaft elevator to move up and down, the bottom end of the elevating lever with it is described
Connecting plate connection；
The sampling mechanism includes that probe tube, connection hose, water pump and frequency converter, the probe tube are fixed on the connecting plate
On, the water outlet of the probe tube and the connection hose connect, and the water pump is mounted on the connection hose, the frequency conversion
The signal output end of device is connect with the signal input part of the water pump；
The signal output end of the controller is connect with the signal input part of the driving motor and the frequency converter respectively, described
Controller controls the driving motor to adjust the position of probe tube, the controller to the frequency converter send frequency signal with
Control pump capacity.
2. the suspended load sampler according to claim 1 for flume test, which is characterized in that the probe tube is
Stainless steel tube or copper pipe.
3. the suspended load sampler according to claim 1 for flume test, which is characterized in that the water pump be with
The pipeline pump that the connection hose matches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821587881.1U CN208860640U (en) | 2018-09-27 | 2018-09-27 | A kind of suspended load sampler for flume test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821587881.1U CN208860640U (en) | 2018-09-27 | 2018-09-27 | A kind of suspended load sampler for flume test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208860640U true CN208860640U (en) | 2019-05-14 |
Family
ID=66419648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821587881.1U Active CN208860640U (en) | 2018-09-27 | 2018-09-27 | A kind of suspended load sampler for flume test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208860640U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109030109A (en) * | 2018-09-27 | 2018-12-18 | 中国水利水电科学研究院 | A kind of suspended load sampler and sampling method for flume test |
| CN112781933A (en) * | 2021-01-13 | 2021-05-11 | 安徽理工大学 | Filtering type sampler for suspended load silt and sampling method |
-
2018
- 2018-09-27 CN CN201821587881.1U patent/CN208860640U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109030109A (en) * | 2018-09-27 | 2018-12-18 | 中国水利水电科学研究院 | A kind of suspended load sampler and sampling method for flume test |
| CN112781933A (en) * | 2021-01-13 | 2021-05-11 | 安徽理工大学 | Filtering type sampler for suspended load silt and sampling method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN208860640U (en) | A kind of suspended load sampler for flume test | |
| CN213422703U (en) | Water environment sampling and detecting equipment | |
| CN210178345U (en) | Novel intelligent monitoring device for oil pumping unit | |
| CN109030109A (en) | A kind of suspended load sampler and sampling method for flume test | |
| CN112013922A (en) | Channel section washes intelligent detecting system that becomes silted up | |
| CN108169067A (en) | Concrete waste grout concentration detection apparatus | |
| CN216718733U (en) | Double-barrel type weighing rain measuring barrel | |
| CN108708709B (en) | The device and method of pit shaft inner ring film thickness where measuring vortex drainage gas production tool | |
| CN113155412A (en) | Device and method for monitoring suspended load and bed load sand transportation rate in real time | |
| CN108549311A (en) | Workover treatment automatic data collection analysis system and control method | |
| CN109459804A (en) | A kind of rainfall gauge | |
| CN209102153U (en) | A kind of U-shaped canal airfoil type automatic measuring water installations | |
| CN206790926U (en) | The all-hydraulic fertilizer applicator for orchard that a kind of ditching depth automatically adjusts | |
| CN209460437U (en) | A kind of rainfall gauge | |
| CN201569667U (en) | Pipeline section type ultrasonic flow speed and flow measuring device | |
| CN2864713Y (en) | Multiple-pass double skip pluviograph | |
| CN215108823U (en) | Online measuring device for non-full pipe of outlet flow of drilling well | |
| CN110657349B (en) | Mine tailing paste slurry ring pipe test system and system operation method | |
| CN110907223B (en) | Ultra-deep sampling device for critical liquid level high turbidity water and use method thereof | |
| CN209802747U (en) | Continuous measurement type ore pulp concentration detection device | |
| CN208721463U (en) | A kind of suspended load sampler obtaining real-time relative position | |
| CN110736503A (en) | continuous gas measuring device | |
| CN215491883U (en) | System for accurately measuring oil well yield and crude oil water content in oil field | |
| CN204374027U (en) | A kind of ground drilling liquid density measuring equipment | |
| CN213209613U (en) | Underground water intake control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |