CN204495381U - The device that a kind of bed mud oxygen demand is measured - Google Patents

Abstract

The utility model discloses the device that a kind of bed mud oxygen demand is measured, belong to environment-protective water matter monitoring technical field.Be mainly used in the bed mud water quality monitoring of the surface water bodies such as lake, river, reservoir, pond, landscape water.This device is made up of opaque plastics case, multi-parameter water quality monitor, packing ring, stationary installation, unwatering pump, micropore current emanator, rheostat, plastic base plate, angle bar, viewport, hand rope.System can steadily be deposited in sediment layer, the target bed mud that will observe can be sealed completely, dissolved oxygen concentration can be monitored continuously and reach more than two hours, the monitoring requirements of different depth water body can be adapted to, have larger development space in river and lake water quality monitoring field.

Description

The device that a kind of bed mud oxygen demand is measured

Technical field

The utility model belongs to environment-protective water matter monitoring technical field, is mainly used in the bed mud water quality monitoring of the surface water such as lake, river, reservoir, pond, landscape water body.

Background technology

The surface water such as river, lake, reservoir, pond of China mostly also exists serious pollution.After a large amount of undressed industrial sewages, sanitary sewage, agricultural irrigation, water directly enters river, river, lake, sea, causes the frequent generation of water pollution and eutrophication.Pollutant is larger than water due to proportion, mostly falls to the bottom, and a large amount of contaminant degradations has exceeded the self-purification capacity of water body, consumes the oxygen of bottom water body, makes bottom water body be in anaerobic condition for a long time.Dissolved oxygen DO is not enough, and anaerobic digestion produces foul smell and black liquor, causes water body to turn black smelly.Simultaneously due to bottom water hypoxia, facilitate the release of phosphorus in bed mud, further increase the possibility that wawter bloom occurs.

Bed mud oxygen demand refers to that bed mud is in the process of decomposing organic matter, and dissolved oxygen DO is consumed the speed of absorption in water body.In lake or the slow river flowed, or bed mud has in the river of high organic, and bed mud oxygen demand may become the main cause of water body low DO concentration.Low DO concentration is fatal to fish and other hydrobionts.Bed mud oxygen demand is important dissolved oxygen DO storehouse, is the major reason causing body eutrophication, is the strong impact that algal suspension sedimentation is decomposed.Reduce the quantity of algae, bed mud oxygen demand must be reduced simultaneously.

On a large scale, stable measurement bed mud oxygen demand is also not easy, one is because bed mud oxygen demand measuring equipment can sink in mud by soft bed mud, another one reason successfully measures bed mud oxygen demand, water body on bed mud needs enough oxygen level (>3.0mg/L), because prevent the microorganism on bed mud surface from starting anaerobic digestion, also because higher than 3.0mg/L, the degradation rate of dissolved oxygen DO is linear, and lower than 3.0mg/L, the degradation rate of dissolved oxygen DO is nonlinear, is infinitely close to 0 along with the reduction of dissolved oxygen content.

The device that original position bed mud oxygen demand is measured must be the water that can be separated some, is separated the bed mud of certain area, stirs or affect bed mud to minimum degree, minimum degree ground bottom-dwelling, and minimum degree ground changes environment around.

Summary of the invention

The utility model provides a kind of device for measuring bed mud oxygen demand.This device comprises: the stationary installation of the opaque plastics case of bottom opening, multi-parameter water quality monitor, packing ring, multi-parameter water quality monitor, unwatering pump, micropore current emanator, rheostat, plastic base plate, angle bar and viewport, hand rope composition.Opaque plastics case is fixed by angle bar and plastic base plate; Multi-parameter water quality monitor is fixed on the middle of transparent plastic case by packing ring, then is fixed by corner bracket; Unwatering pump is also fixed on plastic box, and water delivering orifice is connected with three (or multiple) micropore current emanator by shunt; Plastic box has viewport, and hand rope is equipped with at plastic box two ends.

In said apparatus, the agent structure of plastic box is made up of PVC, ABS material, and plastic box is opaque structure, affects measurement result to prevent carrying out photosynthesis in casing.Plastic box area is fixed, open bottom towards bed mud (see Fig. 1) in order to be separated the water body of a known volume and floorage.

In said apparatus, multi-parameter water quality monitor is connected with plastic box with stationary installation by packing ring, and vertically stand on the centre (see Fig. 1) of casing, multi-parameter water quality monitor can monitor temperature, dissolved oxygen DO, turbidity, conductivity, pH etc., this multi-parameter water quality monitor can monitor the dissolved oxygen DO of low discharge, and dissolved oxygen DO data do not produce larger fluctuation by the impact of water flow variation.Multi-parameter water quality monitor is able to programme, and every 5 minutes automatic record data reach more than two hours.

In said apparatus, the water inlet of unwatering pump is towards in casing, and water delivering orifice is connected with micropore current emanator.Water pump in casing goes out by unwatering pump, is then again back in casing by micropore current emanator.Unwatering pump is driven by rechargeable battery, and this design can the water body that comes of composite liberation effectively, and minimally reduces the stirring of bed mud.

Rheostat is equipped with in said apparatus, unwatering pump, due to the speed of water circulation in the current of regulable control unwatering pump and case.The flow velocity controlling unwatering pump can make the current in casing fully mix and simulate the water velocity near daily bed mud.Research shows, flow velocity, when 3cm/s and 6cm/s, can't affect the mensuration of bed mud oxygen demand.

In said apparatus, below plastic box, angle bar is housed, for inserting sediment layer and completely airtight and capping needs the appointment area bed mud of research and the water body of designated volume.

In said apparatus, have the bracing or strutting arrangement of plastic base plate below angle bar, plastic base plate provides extra stayed surface to amass for casing, casing can be made stably to be deposited on bed mud, and do not need to provide extra exerting oneself.Angle bar and backing plate can make device just in time fall on bed mud, instead of go deep into sediment layer, cause the error measuring bed mud oxygen demand.

In said apparatus, tank surface is equipped with can the viewport of folding, and viewport is used for finder and places the turbidity of rear box inside, ensures that bed mud does not have large-scale disturbance during placement and DATA REASONING.

In said apparatus, hand rope is housed about plastic box, is convenient to staff and is positioned on bed mud, and strongly do not stir and affect bed mud.

Compared with prior art, the beneficial effects of the utility model are:

1. measure area to fix: this device can close the water body of fixed volume and the bed mud of fixed-area, is convenient to later measurements and calculations.

2. reduce bed mud to greatest extent to stir: the micropore current emanator of this device in backflow casing while current, can reduce the stirring to bed mud, to prevent measuring error to greatest extent.

3. the bottom environment under simulating natural condition: control the water velocity above the bed mud under the water velocity energy simulating natural condition of unwatering pump.

4. convenient layout and observation: this device can install viewport and hand rope, is convenient to observe and arrange.

Accompanying drawing explanation

Above-mentioned advantage of the present utility model will become obvious and easy understand from the following description of the accompanying drawings of embodiments, wherein: Fig. 1 is that the structure of whole device illustrates, mark 1. multi-parameter water quality monitor 2. packing ring 3. unwatering pump 4. hand rope 5. casing 6. plastic base plates 7. in figure to fix foot rest 8. multiparameter and to pop one's head in 9. micropore current emanator 10. angle bar 11. viewports

Fig. 2 is that the structure of unwatering pump and micropore current emanator illustrates, marks: 13. unwatering pump 14. micropore current emanator in figure

Embodiment

Embodiment of the present utility model is described below, and the example of described embodiment is shown in the drawings, and the embodiment described by reference to accompanying drawing is exemplary, only for explaining the utility model, and can not be interpreted as the restriction of utility model.

In description of the present utility model, term " on ", D score, " end ", " top ", " front ", " afterwards ", " interior ", " outward ", " horizontal stroke ", the orientation or the position relationship that the instruction such as " to erect " be based on orientation shown in the drawings or position relationship, are only used to be convenient to describe the utility model and simplified characterization, instead of instruction or imply the particular orientation that the device of indication or element must have, with specific azimuth configuration and operation, therefore can not be interpreted as restriction of the present utility model.

In the present embodiment, adopt the black PVC plastic box of a long 56cm × wide 21.5cm that market customizes, bottom is empty, and this casing can hold 52 premium on currency and close the bottom surface area of 0.225 ㎡, and multi-parameter water quality monitor adopts the probe of company, the dissolved oxygen probe of the said firm has low discharge dissolved oxygen DO monitoring capability, and multi-parameter water quality monitor is arranged on the middle of whole plastic box by packing washer, and is fixed by corner bracket.The multi-parameter water quality monitor of the said firm can use include accumulator every 5 minutes continuously monitoring reach more than 2 hours.Unwatering pump adopts marine drainage pump common on market, this unwatering pump 12v rechargeable battery drives, pump water speed is 1360L/ hour (23L/ minute), unwatering pump water inlet is placed in casing, water delivering orifice is connected with micropore current emanator by plastic pipe (right-angle bend, four-way) etc.The bottom of casing is connected with angle bar by fixed screw, and then angle bar is fixed on 1 ㎡ size, on the plastic plate that 6mm is thick.Casing can dig two observation hole, and viewport transparent plastic cover is closed.Casing both sides are fixed with hand rope.On shallow water beach, the layout of specially putting can by one man operation, in profundal zone, and available 1 ~ 2 frogman's collaborative work.Before and after arranging, avoid stirring bed mud as far as possible.After arrangement apparatus, application unwatering pump carries out rinse to specially putting, and after 15 minutes, the water in device reaches identical with the water of device external environment.Then after determining to rise without bed mud by viewport, close viewport, slide rheostat, is adjusted to unwatering pump water velocity identical with the nearly bed mud water velocity measured in advance, opens water quality monitor, record and reading.

Multiple illustrative examples of the present utility model is described in detail embodiment of the present utility model, but those skilled in the art can design multiple other improvement and embodiment, these improve and embodiment will drop in the spirit and scope of the utility model principle.Concrete, aforementioned open, in the scope of accompanying drawing and claim, rational modification and improvement can be made in the layout of parts and (or) sub-combination layout, and spirit of the present utility model can not be departed from.

Claims (10)

1. a device for bed mud oxygen demand measurement, is characterized in that using opaque plastics case and multi-parameter water quality monitor.Comprise the opaque plastics case of bottom opening, multi-parameter water quality monitor, packing ring, the stationary installation of multi-parameter water quality monitor, unwatering pump, micropore current emanator, rheostat, plastic base plate, angle bar and viewport, hand rope composition.Opaque plastics case is fixed by angle bar and plastic base plate; Multi-parameter water quality monitor is fixed on the middle of transparent plastic case by packing ring, then is fixed by corner bracket; Unwatering pump is also fixed on plastic box, and water delivering orifice is connected with three micropore current emanator by shunt; Plastic box has viewport, and hand rope is equipped with at plastic box two ends.

2. device according to claim 1, opaque plastics case can be PVC, ABS material.

3. device according to claim 1, multi-parameter water quality monitor can monitor temperature, dissolved oxygen DO, conductivity, turbidity, pH, and can record and store the data of long period, multi-parameter water quality monitor can monitor low water flow data, and not by the impact of water flow variation.

4. device according to claim 1, multi-parameter water quality monitor is fixed on plastic box by packing ring and stationary installation.

5. device according to claim 1, unwatering pump has rechargeable battery, and water delivering orifice one end is connected with current emanator.

6. device according to claim 1, unwatering pump is equipped with rheostat, for controlling the speed of water circulation in the current of unwatering pump and case.

7. device according to claim 1, is equipped with angle bar below plastic box, for inserting and closed plastic case.

8. device according to claim 1, has plastic base plate bracing or strutting arrangement below angle bar.

9. device according to claim 1, plastic box is equipped with can the viewport of folding.

10. device according to claim 1, is equipped with hand rope about plastic box.