CN205120440U - Constant current atmospheric sampling ware - Google Patents

Abstract

The utility model relates to an environmental monitoring field, the utility model aims at providing a constant current atmospheric sampling ware. The technical scheme who adopts is: a constant current atmospheric sampling ware, includes the base, is equipped with concentricity multilayer tube -shape baffle on the base, the baffle is equipped with a plurality of blow vents, and the blow vent of corresponding position is located top and bottom respectively according to vertical direction on the adjacent baffle, presses the mode setting of horizontal direction dislocation, but the baffle top is equipped with the top cap of straining, the sampling material is placed in space between the tube -shape baffle, the outmost drier that is, inlayer baffle is inside divide into about two parts, some places the sampling material, another part is equipped with the vacuum pump, the blow vent on the inlayer baffle is located its inside sampling material and corresponds the position, vacuum pump gas vent the place ahead is equipped with the vent, the utility model discloses simple structure, convenient operation need not use precision instruments, is fit for field work and transportation, can realize simultaneously that the accurate of multiple atmospheric composition detects.

Description

A kind of constant current air sampler

Technical field

The utility model belongs to environmental monitoring field, is specifically related to a kind of air sampler.

Background technology

Along with China's urbanization in recent years and industrialized fast development, urban air pollution problem becomes more and more serious, brings harm and the threat of many healthy and safe aspects to city dweller.Along with the exploitation successively of many advanced analysis methodology, the analytical test level of environmental sample is greatly improved.But the collecting work of atmospheric sample is subject to the restriction of all many condition.

Due to the humidity moment change in the atmospheric environment of reality, the difference of humidity causes the skewness of dust in air, owing to there being the existence of moisture in gas, enter into from thief hatch between result that measuring instrument detects and the actual dust of air or dusty gas containing the soft air of dust soft air or dusty gas and there are differences, cause result inaccurate; If containing too many aqueous vapor in air, also can air pump be damaged, therefore, be necessary to carry out drying to gas in atmospheric sampling process.And gas componant is complicated in atmospheric environment, existing sampling thief mostly is single homework, and during sampling, air does not fully contact with sample material, causes the last inaccurate and multiple sampling thief simultaneously analyzed of the result too complex again measured, volume is comparatively large, inconvenient outdoor work.

Summary of the invention

The purpose of this utility model is to provide a kind of constant current air sampler that simultaneously accurately can detect multiple Atmospheric components.

For achieving the above object, the technical scheme that the utility model adopts is: a kind of constant current air sampler, it is characterized in that: comprise base, base is provided with the concentricity tubular dividing plate of multilayer, dividing plate is provided with multiple blow vent, and the blow vent of correspondence position lays respectively at top and bottom by vertical direction in adjacent separator, arrange by the mode of horizontal direction dislocation; Being provided with above described dividing plate can the top cover of fastening, and top cover is provided with handle; Different sample material is placed in space between the every one deck of described tubular dividing plate, outermost one deck is drying agent, innermost layer diaphragm internal space is divided into upper and lower two parts, wherein a part places sample material, another part is provided with vacuum pump, and the blow vent on innermost layer dividing plate is positioned at its internal sample material correspondence position; Vacuum pump exhaust port front is provided with and is communicated with extraneous ventilating opening.

Preferred: described vacuum pump power invariability.

Preferred: described vacuum pump is positioned at the bottom in one deck diaphragm internal space, and the blow vent of innermost layer dividing plate is arranged on dividing plate top, then determines the position of outer dividing plate upper vent successively.

Preferred: described sample material ventilated membrane wraps up, and is closely arranged in the position between dividing plate.

Preferred: blow vent place is provided with house ventilation railings.

The utility model has following beneficial effect: the utility model structure is simple, easy to operate, does not need to use exact instrument, is applicable to field work and transport.The blow vent that the utility model utilizes upper-lower position contrary, form sufficiently long inlet channel in sampling thief inside, gas is fully contacted with sample material, ensure the accurate of sampled result, multilayer sample material is arranged successively simultaneously, can realize the detection respectively of multiple Atmospheric components.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

Fig. 2 is the vertical view of baffle arrangement;

Fig. 3 is the upward view of baffle arrangement;

Fig. 4 is the structural representation of ventilation fence.

Embodiment

Constant current air sampler described in the utility model can be cylindrical, also can be rectangular parallelepiped, shape and size can be selected according to real needs, explain in detail with regard to cylindrical embodiment as shown in Figure 1 below, constant current air sampler comprises base 1, base 1 is provided with concentric multilayered cylindrical dividing plate 2, dividing plate 2 is provided with multiple blow vent 3, and the blow vent 3 of correspondence position lays respectively at top and bottom by vertical direction in adjacent separator 2, arrange by the mode of horizontal direction dislocation, blow vent 3 can be square or circular, suitable size can be set according to overall size and ensure that air is unobstructed.As shown in Figure 2,3, space between every one deck dividing plate 2 is tubulose, air hole 3 is offered respectively at adjacent separator 2 top and bottom, such gas will enter from a blow vent 3, through the space two dividing plates 2, the blow vent 3 just by internal layer dividing plate 2 enters next space, and gas is Tortuous flow in sampling thief, greatly increase gas channel, ensure the complete of sample collection process.Wherein the blow vent 3 of each layer dividing plate 2 is arranged to be opened in by the blow vent 3 of innermost layer dividing plate 2 and is offered other blow vents 3 away from premised on vacuum pump 5 one end, because of the composition quantity according to required detection, dividing plate 2 quantity can adjust, in order to ensure that gas is extracted out by vacuum pump 5 by innermost layer sample material 7 again, the position of other dividing plate 2 upper vents 3 can only be adjusted according to blow vent 3 position of innermost layer dividing plate 2, as shown in Figure 1, then the blow vent 3 of innermost layer dividing plate 2 is located at dividing plate 2 top, then dividing plate 2 is successively outwards offered blow vent 3 and is positioned at bottom successively, top, and bottom, and horizontal direction dislocation arrangement.Being provided with above described dividing plate 2 can the top cover 4 of fastening, top cover 4 is provided with handle 6, convenient opening and closing top cover and carrying instrument, the fastening of top cover 4 energy, if requirement of experiment precision is high, can seal with elastometic washer be adopted and first take out the air in instrument according to the power of vacuum pump 5.

According to Atmospheric components quantity and the character of required monitoring, the every one deck of tubular dividing plate 2 places different sample material 7, can not be influenced each other between described different sample material 7 sampled result, such as front one deck reaction produces the such situation of interference gas, ensure that every one deck sample material 7 plays expected effects, could realize accurately detecting multiple Atmospheric components simultaneously.And sample material 7 outermost one deck is drying agent, drying agent can use unslaked lime or silica gel, in order to get rid of interference that water vapour monitors each layer and the infringement to vacuum pump 5.Due to more less toward interior space, spacing between dividing plate 2 can be designed to according to demand and inwardly progressively increase, or sample material 7 large for consumption is placed on outer space.Innermost layer dividing plate 2 inner space is divided into upper and lower two parts, and wherein a part places sample material 7, and another part is provided with vacuum pump 5, and the blow vent 3 on innermost layer dividing plate 2 is positioned at its internal sample material 7 correspondence position; Vacuum pump 5 exhausr port front is provided with ventilating opening 11.In the preferred embodiment of Fig. 1, in order to make sampling thief more stable, adopting lower part to place vacuum pump 5, then needing to offer ventilating opening 11 on base 1, unimpeded in order to ensure ventilating opening 11, also can add ventilation slot on base.Can be wound around cotton outside vacuum pump 5 or sponge carries out damping process, now need to arrange thin wire gauze or gauze in vacuum pump 5 air intake opening front, the sample material 7 of upper part can not use dusty material.

Experimentally need, measure Atmospheric components and ratio thereof, need to measure monitored atmospheric sample, vacuum pump 5 power invariability, ensure that instrument vibrations are less, air-flow constant magnitude also make sampling evenly, the more important thing is and can go out volume by gas according to power conversion, for later stage measuring and calculating provides stable data.Detected by the quantity of later stage to Atmospheric components corresponding in each sample material 7 again, calculate each Atmospheric components concentration in an atmosphere, should be noted that sampling duration in operation, determine that sample material 7 is enough, the Atmospheric components data avoiding sample material 7 to cause not measuring are inaccurate.

For sample material 7 placement and collect problem, following preferred structure can be adopted: if sample material 7 is for block fixing, then house ventilation railings 31 as described in Figure 4 can be set at blow vent 3 place, not affect when gas flow is colluded and prevent sample material 7 from mixing.If sample material 7 is Powdered, then with ventilated membrane, sample material 7 is wrapped up shaping, closely be arranged in the space between dividing plate 2, also the nylon cloth that aperture is very little can be used, place and collect all more convenient, block sample material 7 also can use ventilated membrane, but will notice that placement and process of collecting do not damage ventilated membrane.

Claims (5)

1. a constant current air sampler, it is characterized in that: comprise base (1), base (1) is vertically provided with concentric multilayered cylindrical dividing plate (2), dividing plate (2) is provided with multiple blow vent (3), and the blow vent (3) of the upper correspondence position of adjacent separator (2) lays respectively at top and bottom by vertical direction, arranges by the mode of horizontal direction dislocation; Described dividing plate (2) top is provided with can the top cover (4) of fastening, and top cover (4) is provided with handle (6);

Each sheaf space between described tubular dividing plate (2) places different sample material (7), outermost one deck sample material (7) is drying agent, innermost layer dividing plate (2) inner space is divided into upper and lower two parts, wherein a part places sample material (7), and another part is provided with vacuum pump (5); Blow vent (3) on innermost layer dividing plate (2) is positioned at its internal sample material (7) correspondence position; Vacuum pump (5) exhausr port front is provided with and is communicated with extraneous ventilating opening (11).

2. constant current air sampler according to claim 1, is characterized in that: described vacuum pump (5) power invariability.

3. constant current air sampler according to claim 2, is characterized in that: described vacuum pump (5) is positioned at the bottom of one deck dividing plate (2) inner space, and sample material (7) is positioned at top; The blow vent (3) of innermost layer dividing plate (2) is arranged on dividing plate (2) top.

4. constant current air sampler according to claim 3, is characterized in that: described sample material (7) ventilated membrane wraps up, and is closely arranged in the position between dividing plate (2).

5. constant current air sampler according to claim 3, is characterized in that: described blow vent (3) place is provided with house ventilation railings (31).