CN203443763U - Device of simulating resuspension of in situ bottom mud in shallow lake complex circumfluence condition and using method thereof - Google Patents
Device of simulating resuspension of in situ bottom mud in shallow lake complex circumfluence condition and using method thereof Download PDFInfo
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- CN203443763U CN203443763U CN201320341864.0U CN201320341864U CN203443763U CN 203443763 U CN203443763 U CN 203443763U CN 201320341864 U CN201320341864 U CN 201320341864U CN 203443763 U CN203443763 U CN 203443763U
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Abstract
The utility model relates to a device of simulating resuspension of in situ bottom mud in a shallow lake complex circumfluence condition. The device is a flow velocity measuring device consisting of a flow velocity measuring instrument, a lifting platform, a spiral rod, and a vertical ruler, and is characterized by comprising as well as a circular water tank consisting of a water tank body and a water tank base, a horizontal circumfluence generating system consisting of a variable frequency motor, a gear, a bearing rotary table, and a telescopic paddle, and a vertical compensation circumfluence generating system consisting of a water inlet, a water inlet gradation flexible pipe, a water inlet variable frequency pump, a water absorption pipe, a water outlet, a water outlet gradation flexible pipe, a water outlet variable frequency water pump, a water outlet pipe, and a bucket. The using method is simple and convenient. The device can simulate a complex circumfluence structure under the action of the superposition of the horizontal circumfluence and the vertical compensation circumfluence formed by wind fields with different intensities to collect water samples and measure the flow velocity in different depths, and is widely suitable for model experiments in the technical field of water ecological environment.
Description
Technical field
The utility model belongs to water ecological setting technical field, particularly relates to a kind of device that under the complicated circulation condition of shallow lake, original position bed mud suspends again of simulating.
Background technology
China is vast in territory, lake is numerous, and because of to the irrational utilization of lake resource or excessively discharge dirty waste water etc. and all can destroy the ecologic environment in lake, the water quality of In Middle And Lower Reaches of Changjiang River shallow lake and eutrophication problem became increasingly conspicuous in recent years.Research is thought, in shallow lake, the raw hydrodynamic condition of miscarriage is suspended with material impact again to sediments humorously, particularly at varying strength, under the Wind of various durations, not only can there is in the horizontal direction circulation in most of shallow water lake region, and in vertical direction because vertical compensation circulation also can occur for the loss of water body, this dual complicated circulation structure is all obtained checking in the typical shallow lakes such as Taihu Lake, Chaohu.The key measure of improving lake water quality is to control the transmission of water body and sediments mass exchange and energy in lake.
The method that known shallow lake sediments suspends is again mostly lab simulation, mainly contains three kinds of conical flask formula, straight pipe type and water tank types.Conical flask formula is used oscillator that the bed mud that is placed in bottle is shaken together with overlying water; Straight pipe type is by piston up-down or revolve oar rotation and cause overlying water disturbance; Water tank type is to cause water sports above bed mud with revolving oar thruster, wave making machine etc., thereby produce bed mud, suspends again.The energetic disturbance that these methods produce overlying water, left and right vibrations, extruding or the motion of water body integral level up and down, all fail truly to reflect the vertical circulation structure producing under the effect of shallow lake wind current.Therefore, some scholars have proposed the method that simulation sediments suspends under vertical circulation effect again, although the method has been considered the impact that the vertical circulation of water body under wind-stress effect suspends on sediments again, but fail to consider the effect in water body horizontal direction flow field, cannot truly reflect under the complicated circulation condition that shallow lake causes by wind-stress the sediments process that suspends again.
Chinese patent application 20041014329.X, has proposed a kind of " a kind of method and device of lab simulation re-suspension of underwater state ", and this technical scheme is mainly comprised of Y type connecting pipe and rotating propeller device.Although there is the underwater engine that can obliquely apply intensity variable size, make suspended particle in water column become the advantage of vertical distribution state, but also have the following disadvantages, the one, the flow field that the underwater engine that rotating propeller device is oblique to be applied produces can not real simulation shallow lake reality flow field humorously, because of the process that suspends again of the bed mud in the different well Simulation of Complex flow field situations of flow field state; The 2nd, the underwater engine that rotating propeller device applies, they are different to the turbulent feature of sediment disturbance from actual complex flow field, field to the turbulent feature of sediment disturbance, the difference of turbulent flow perturbation features causes the sediment difference of process that suspends again, thereby directly affects the analog result that sediment suspends again.
Chinese patent application 201210366663.6, proposed a kind of " for simulating the shallow lake apparatus and method that sediment suspends again under vertical circulation effect humorously ", this technical scheme is mainly comprised of Rectangular Water Trough, current propulsion system and flow rate measuring device.Although have advantages of in Rectangular Water Trough and roll and drive the mobile vertical circulation humorously existing in shallow lake that forms of surface water with travelling belt, but also have the following disadvantages, the one, this device current propulsion system can only produce vertical circulation, cannot simulate and form the especially ubiquitous horizontal circulation such as Taihu Lake of In Middle And Lower Reaches of Changjiang River shallow lake; The 2nd, by travelling belt, drive surperficial water sports, thereby after the wall of water body chance tank limit, move in the opposite direction and form vertical circulation in dive to bed mud surface, this vertical circulation water reception tank limit wall impact is larger, thereby different from the vertical compensated loop flow structure forming due to water body loss in actual shallow lake wind current; The 3rd, the vertical circulation that drives overlying water to form by travelling belt is different from the complex flowfield of field reality, well the process that suspends again of the bed mud in complex flowfield situation under analog composite effect; The 4th, this device bed mud cargo handling process need first be removed current propulsion system and flow rate measuring device, load and unload extremely inconvenient, larger to the structural failure of bed mud original state in cargo handling process.
Chinese patent application 201310184563.6, has proposed " a kind of soft cloth sealing bottom type shallow water territory original state surface deposit sampling thief ", and this sampling thief is mainly comprised of sampling sleeve, sampling mechanism and sampling inner bag.Although have, sampling area is large, to be sampled into power high and do not destroy the advantages such as surface deposit physical arrangement and sequence structure, but this sampling thief only can gather shallow water territory original state surface deposit, can not utilize the surface deposit of collection to carry out further simulation suspension test research again.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art and a kind of device that under the complicated circulation condition of shallow lake, original position bed mud suspends again of simulating is provided, the utility model can be simulated the horizontal circulation of varying strength wind field formation and the complicated circulation structure under vertical compensation circulation superposition, carries out the collection of different depth water body example and the mensuration of different depth flow velocity.
According to what the utility model proposes, a kind ofly simulate the device that under the complicated circulation condition of shallow lake, original position bed mud suspends again, it comprises by Flow speed measurer, hoistable platform, the flow rate measuring device that screw rod and vertical scale form, characterized by further comprising the circular channels being formed by tank body and tank base, by variable-frequency motor, gear, the horizontal circulation generation systems that bearing rotating disk and scalable paddle board form and by water inlet, water inlet gradual change flexible pipe, water inlet variable frequency pump, suction hose, water delivering orifice, water outlet gradual change flexible pipe, water outlet variable frequency pump, the vertical compensation circulation generation systems that rising pipe and bucket form, wherein: tank body surrounding suitable for reading is provided with aperture and groove, and be connected with horizontal circulation generation systems, bearing rotating disk is connected by aperture and tank body, variable-frequency motor is connected through groove and gear, bearing rotating disk lower edge axially arranges respectively scalable paddle board, tank body arranges water inlet near a side at position suitable for reading, same side position near bottom sets out the mouth of a river, water inlet and water delivering orifice and vertical compensation circulation generation systems one side are connected, water outlet variable frequency pump is connected by water outlet gradual change flexible pipe and water delivering orifice, water inlet variable frequency pump is connected by water inlet gradual change flexible pipe and water inlet, the suction hose of the rising pipe of water outlet variable frequency pump and water inlet variable frequency pump is placed in to bucket jointly, vertical compensation circulation generation systems opposite side outer wall arranges 4 ~ 8 able to turn on or off thief holes from top to down, Flow speed measurer and hoistable platform are connected, hoistable platform and screw rod are connected, vertical scale and screw rod are connected, tank base is connected by ring flange and tank body.
The principle that the utility model is realized is: theoretical according to kinematic similitude, and utilize water outlet variable frequency pump to draw water to make tank body bottom at a time form water body attrition status and simulate the vertical compensation circulation that runs off and form due to water body in shallow lake wind current; Theoretical according to dynamic similarity again, to utilize scalable paddle board to water body machinery effect of dragging simulation wind field, the effect of dragging of water body to be formed flow state; After this two kinds of flow states stack, formed flow fields meet the complicated Circulation Features of shallow lake, and the utility model device of design and using method thereof can be simulated the shallow lake bed mud process that suspends again completely therefrom.
The utility model compared with prior art its remarkable advantage is: the one, and utilize the scalable paddle board in circular channels to drive water body to rotate, produce the horizontal circulation extensively existing in shallow lake wind current, utilize again water outlet variable frequency pump and water inlet variable frequency pump circulation to draw water and produce the vertical compensation circulation extensively existing in shallow lake wind current, guaranteed that thus the disturbance under the complicated circulation structure of horizontal circulation and the stack of vertical compensation circulation more approaches the practical flow field situation that in shallow lake, in water body, bed mud suspends again; The 2nd, utilize the tank base of the utility model device effectively to receive the bed mud sample that a kind of soft cloth sealing bottom type shallow water territory original state surface deposit sampling thief that Chinese patent application 201310184563.6 proposes gathers, to guarantee that testing the vertical original state structure of bed mud is not destroyed, and has maintained bed mud primary characteristic; The 3rd, by regulating variable-frequency motor rotating speed, water outlet variable frequency pump and the water inlet variable frequency pump flow structure of level of control circulation and vertical compensation circulation arbitrarily, to adapt to the power requirement of lake current to bed mud under the strong condition of different wind.The utility model is widely used in the simulation test of water ecological setting technical field.
Accompanying drawing explanation
Fig. 1 is general structure diagrammatic cross-section of the present utility model.
Fig. 2 is the schematic side view that the circular channels of flow rate measuring device is set described in the utility model.
Fig. 3 is the apparatus structure schematic diagram of horizontal circulation generation systems described in the utility model.
Fig. 4 be described in the utility model at depth of water 30cm, variable-frequency motor rotating speed, be that 180 r/min, water outlet variable frequency pump and water inlet variable frequency pump flow are the central lateral plane flow field schematic diagram of the device under 300L/h condition.
Fig. 5 be described in the utility model at depth of water 30cm, variable-frequency motor rotating speed, be that 180 r/min, water outlet variable frequency pump and water inlet variable frequency pump flow are the horizontal flow field schematic diagram of the following 10cm layer of the 300L/h water surface.
Fig. 6 be described in the utility model at depth of water 30cm, variable-frequency motor rotating speed, be that 180 r/min, water outlet variable frequency pump and water inlet variable frequency pump flow are the horizontal flow field schematic diagram of the following 25cm layer of the 300L/h water surface.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
In conjunction with Fig. 1, Fig. 2 and Fig. 3, what the utility model proposes a kind ofly simulates the device that under the complicated circulation condition of shallow lake, original position bed mud suspends again, and it comprises by Flow speed measurer (15), hoistable platform (16), the flow rate measuring device that screw rod (17) and vertical scale (18) form, the circular channels being formed by tank body (1) and tank base (20), by variable-frequency motor (5), gear (6), the horizontal circulation generation systems that bearing rotating disk (4) and scalable paddle board (7) form and by water inlet (8), water inlet gradual change flexible pipe (13), water inlet variable frequency pump (14), suction hose (26), water delivering orifice (9), water outlet gradual change flexible pipe (10), water outlet variable frequency pump (11), the vertical compensation circulation generation systems that rising pipe (25) and bucket (12) form, wherein: tank body (1) surrounding suitable for reading is provided with aperture (2) and groove (3), and be connected with horizontal circulation generation systems, bearing rotating disk (4) is connected by aperture (2) and tank body (1), variable-frequency motor (5) is connected through groove (3) and gear (6), by variable-frequency motor (5) driven gear (6), rotated, and then drive bearing rotating disk (4) to rotate, bearing rotating disk (4) lower edge axially arranges respectively scalable paddle board (7), scalable paddle board (7) rotates with bearing rotating disk (4), and then drive surface water to produce horizontal circulation going down, tank body (1) arranges water inlet (8) near a side at position suitable for reading, same side position near bottom sets out the mouth of a river (9), water inlet (8) and water delivering orifice (9) are connected with vertical compensation circulation generation systems one side respectively, water outlet gradual change flexible pipe (10) is connected with water delivering orifice (9), water outlet variable frequency pump (11) extracts the former water of test in tank body (1) by water outlet gradual change flexible pipe (10) and delivers to bucket (12) through rising pipe (25), water inlet gradual change flexible pipe (13) is connected with water inlet (8), water inlet variable frequency pump (14) is extracted in bucket (12) and is tested former water in suction hose (26) passes back into tank body (1) by water inlet gradual change flexible pipe (13), make that water body is vertical to be circulated, and then the compensation circulation of formation vertical direction, vertical compensation circulation generation systems opposite side outer wall arranges 4 ~ 8 able to turn on or off thief holes (19) from top to down, Flow speed measurer (15) is connected with hoistable platform (16), and hoistable platform (16) is connected with screw rod (17), and vertical scale (18) is connected with screw rod (17), tank base (20) is connected by ring flange (21) and tank body (1).
The technical parameter of a kind of specific embodiment of simulating the device that under the complicated circulation condition of shallow lake, original position bed mud suspends again the utility model proposes is as follows:
The utility model is comprised of flow rate measuring device, circular channels, horizontal circulation generation systems and vertical compensation circulation generation systems, and wherein the specification of critical piece and requirement are as follows:
The tank body (1) of circular channels adopts thick organic glass or the engineering plastics of 1cm to make; The bottom of tank body (1) and hollow out suitable for reading, internal diameter 30cm, high 43cm, surrounding suitable for reading evenly arranges four diameter 1cm apertures (2) and a diameter 3cm groove (3), and bottom outer wall arranges ring flange (21); Tank body (1) one side arranges respectively the water delivering orifice (9) of diameter 8cm and the water inlet (8) of diameter 8cm, water delivering orifice (9) distance of center circle tank body (1) bottom 5cm, water inlet (8) distance of center circle bottom 22cm, water inlet (8) opposite side outer wall to lower and on be arranged in order 4 able to turn on or off thief holes of aperture 0.4cm (19), the able to turn on or off thief hole (19) of foot is apart from tank body (1) bottom 3cm, and able to turn on or off thief hole (19) distance is each other 5cm; Tank base (20) adopts the thick organic glass of 1cm to make; The sealed bottom of tank base (20), hollow out suitable for reading, internal diameter 30cm, high 20cm; Tank base (20) is connected by ring flange (21) and tank body (1).
The variable-frequency motor of horizontal circulation generation systems (5) is selected the 5IK120GU-C type motor of A.Q.L board; The material of gear (6) is steel, diameter 4cm; The material of bearing rotating disk (4) is steel, diameter 22cm, the long 6cm of scalable paddle board (7), high 2cm, thick 2mm, and the material of scalable paddle board (7) is stainless steel.
Water inlet (8) the diameter 8cm of vertical compensation circulation generation systems; Water inlet variable frequency pump (14) flow range is 100L/h ~ 750 L/h; The material of water inlet gradual change flexible pipe (13) and suction hose (26) is plastics or rubber; Water delivering orifice (9) diameter 8cm; Water outlet variable frequency pump (11) flow range is 100L/h ~ 750 L/h; The material of water outlet gradual change flexible pipe (10) and rising pipe (25) is plastics or rubber; The volume of bucket (12) is greater than 25L, the present embodiment is advisable with 30L, and the material of bucket (12) is plastics.
The Flow speed measurer of flow rate measuring device (15) is MicroADV acoustic Doppler velocimetry; The material of hoistable platform (16) is steel, the long 30cm of hoistable platform (16), wide 30cm, thick 5mm; The material of screw rod (17) is steel, and the minimum scale of the vertical scale (18) of screw rod (17) is 1mm.
The concrete implementation step of using method of the present utility model is as follows:
A, bed mud are prepared: the soft cloth sealing bottom type shallow water territory original state surface deposit sampling thief that application Chinese patent application 201310184563.6 proposes, gather 20cm thick be undisturbed bed mud (22), then by the bed mud (22) that is undisturbed after gathering, to be placed in tank base (20) standby;
B, circular channels assembling: utilize ring flange (21) that tank body (1) is fixed on tank base (20);
C, overlying water prepare: utilizing siphonage is the overlying water (23) of 30cm to adding the depth of water in tank body (1);
D, the assembling of horizontal circulation generation systems: variable-frequency motor (5) is connected through groove (3) and gear (6), make gear (6) and bearing rotating disk (4) bayonet socket close contact, adjust scalable paddle board (7) highly, make scalable paddle board (7) 1 ~ 8cm of overlying water (23) submergence;
E, the assembling of vertical circulation generation systems: water outlet variable frequency pump (11) is connected by water outlet gradual change flexible pipe (10) and water delivering orifice (9), and water inlet variable frequency pump (14) is connected by water inlet gradual change flexible pipe (13) and water inlet (8); The suction hose (26) of the rising pipe of water outlet variable frequency pump (11) (25) and water inlet variable frequency pump (14) is placed in to bucket (12) jointly, in this bucket (12), injects 2 ~ 10L Yuan Shui, the former water of the 5L of take as good;
The use of F, horizontal circulation generation systems and vertical circulation generation systems: opening and setting rotating speed is the variable-frequency motor (5) of 100 ~ 300 r/min, makes the horizontal circulation of water body generation; Open simultaneously and set respectively water outlet variable frequency pump (11) and the water inlet variable frequency pump (14) that flow is 200 ~ 500L/h, make that water body is vertical to be circulated, and then the compensation circulation of formation vertical direction; Guarantee to form the disturbance under complicated circulation structure after these two kinds of flow state stacks;
G, measurement mechanism assembling and use: Flow speed measurer (15) is placed in tank body (1), and be connected with tank body (1) top hoistable platform (16), hoistable platform (16) is connected with screw rod (17), vertical scale (18) is fixed on screw rod (17), the sample frequency of Flow speed measurer (15) is set as 10HZ, by screw rod (17) and vertical scale (18), realize the vertical movement of Flow speed measurer (15) and accurately locate, every vertical line has been surveyed and can realized moving horizontally of Flow speed measurer (15) and accurately be located by the horizontal ruler (24) on hoistable platform (16), and carry out next vertical line and measure, finally draw depth of water 30cm, variable-frequency motor rotating speed is 180 r/min, device central lateral plane flow field when water outlet variable frequency pump and water inlet variable frequency pump flow are 300L/h, refer to Fig. 4, the horizontal flow field of the following 10cm layer of the water surface, refers to Fig. 5, the horizontal flow field of the following 25cm layer of the water surface, refers to Fig. 6,
H, water sample result are measured: the overlying water (23) that 4 the able to turn on or off thief holes (19) that arrange from top to down by vertical compensation circulation generation systems opposite side outer wall gather differing heights carries out water sample result mensuration, and the SS concentration value that records successively first to fourth able to turn on or off thief hole (19) water sample is respectively 1260mg/L, 1220mg/L, 1200mg/L, 1180mg/L.
Above embodiment and embodiment are a kind of for simulating device that under the complicated circulation condition of shallow lake, original position bed mud suspends again and the concrete support of using method technological thought that application be the utility model proposes; can not limit protection domain of the present utility model with this; every technological thought according to the utility model proposes; the change of any equivalent variations of doing on the technical program basis or equivalence, all still belongs to the scope that technical solutions of the utility model are protected.
Claims (2)
1. simulate the device that under the complicated circulation condition of shallow lake, original position bed mud suspends again for one kind, it comprises by Flow speed measurer (15), hoistable platform (16), the flow rate measuring device that screw rod (17) and vertical scale (18) form, characterized by further comprising the circular channels being formed by tank body (1) and tank base (20), by variable-frequency motor (5), gear (6), the horizontal circulation generation systems that bearing rotating disk (4) and scalable paddle board (7) form and by water inlet (8), water inlet gradual change flexible pipe (13), water inlet variable frequency pump (14), suction hose (26), water delivering orifice (9), water outlet gradual change flexible pipe (10), water outlet variable frequency pump (11), the vertical compensation circulation generation systems that rising pipe (25) and bucket (12) form, wherein: tank body (1) surrounding suitable for reading is provided with aperture (2) and groove (3), and be connected with horizontal circulation generation systems, bearing rotating disk (4) is connected by aperture (2) and tank body (1), variable-frequency motor (5) is connected through groove (3) and gear (6), bearing rotating disk (4) lower edge axially arranges respectively scalable paddle board (7), tank body (1) arranges water inlet (8) near a side at position suitable for reading, same side position near bottom sets out the mouth of a river (9), water inlet (8) and water delivering orifice (9) are connected with vertical compensation circulation generation systems one side respectively, water outlet variable frequency pump (11) is connected by water outlet gradual change flexible pipe (10) and water delivering orifice (9), water inlet variable frequency pump (14) is connected by water inlet gradual change flexible pipe (13) and water inlet (8), the suction hose (26) of the rising pipe of water outlet variable frequency pump (11) (25) and water inlet variable frequency pump (14) is placed in to bucket (12) jointly, vertical compensation circulation generation systems opposite side outer wall arranges 4 ~ 8 able to turn on or off thief holes (19) from top to down, Flow speed measurer (15) is connected with hoistable platform (16), hoistable platform (16) is connected with screw rod (17), and vertical scale (18) is connected with screw rod (17), tank base (20) is connected by ring flange (21) and tank body (1).
2. a kind of device that under the complicated circulation condition of shallow lake, original position bed mud suspends again of simulating according to claim 1, is characterized in that vertical compensation circulation generation systems opposite side outer wall arranges 4 able to turn on or off thief holes (19) from top to down.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320341864.0U CN203443763U (en) | 2013-06-14 | 2013-06-14 | Device of simulating resuspension of in situ bottom mud in shallow lake complex circumfluence condition and using method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201320341864.0U CN203443763U (en) | 2013-06-14 | 2013-06-14 | Device of simulating resuspension of in situ bottom mud in shallow lake complex circumfluence condition and using method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103335817A (en) * | 2013-06-14 | 2013-10-02 | 河海大学 | Device of simulating resuspension of in situ bottom mud in shallow lake complex circumfluence condition and using method thereof |
| CN104374896A (en) * | 2014-11-18 | 2015-02-25 | 天津大学 | Testing system simulating bottom sludge pollution in-situ remediation |
| CN105823616A (en) * | 2015-01-04 | 2016-08-03 | 中国地震局地质研究所 | Bed load simulator |
| CN117647286A (en) * | 2024-01-30 | 2024-03-05 | 天津朔程科技有限公司 | Geological environment monitoring device |
-
2013
- 2013-06-14 CN CN201320341864.0U patent/CN203443763U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103335817A (en) * | 2013-06-14 | 2013-10-02 | 河海大学 | Device of simulating resuspension of in situ bottom mud in shallow lake complex circumfluence condition and using method thereof |
| CN103335817B (en) * | 2013-06-14 | 2015-04-29 | 河海大学 | Device of simulating resuspension of in situ bottom mud in shallow lake complex circumfluence condition and using method thereof |
| CN104374896A (en) * | 2014-11-18 | 2015-02-25 | 天津大学 | Testing system simulating bottom sludge pollution in-situ remediation |
| CN105823616A (en) * | 2015-01-04 | 2016-08-03 | 中国地震局地质研究所 | Bed load simulator |
| CN117647286A (en) * | 2024-01-30 | 2024-03-05 | 天津朔程科技有限公司 | Geological environment monitoring device |
| CN117647286B (en) * | 2024-01-30 | 2024-04-05 | 天津朔程科技有限公司 | Geological environment monitoring device |
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| C14 | Grant of patent or utility model | ||
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Granted publication date: 20140219 Effective date of abandoning: 20150429 |