CN2338743Y - Diaphragm type device for sampling bacteria freely stayed in the air - Google Patents

Abstract

The utility model relates to a diaphragm type device for sampling bacteria freely stayed in the air. A box body 2 is provided with a surge chamber 18, a suction pump 17 and a laminar flow grid 16; a gelatin film 15 is arranged on the fixing interface 6 of the box body 2; the gelatin film 15 can trap biologic bacteria freely stayed in the air by maximum efficiency, and can dissolve in the surface of a culture medium; the colony counting is exact; the laminar flow grid 16 can ensure inhalant air from a laminar flow which flows in a single direction; a lengthening component and the quick clamping structure of each interface can ensure the diaphragm type device for sampling bacteria freely stayed in the air is easy in use, and the connection is quick; the utility model overcomes the defects that the trapped ratio of a slit type sampler is not high and is not equal dynamic sampling, etc. The utility model is suitable for pharmaceutical industries, hospitals, and the industries of food and beverage.

Description

The diaphragm-type air borne bacteria sampler

The utility model relates to a gas sampling device, particularly the diaphragm-type air borne bacteria sampler.

Existing aerial bacterioplankton sampling thief is to adopt the slit collecting method to collect bacterium particle in the environment according to the particles hit principle.Bleed by aspiration pump, air is ejected on the plating medium surface of slow rotation, the microorganism adhering that contains in the air on agar medium, is formed bacterium colony after cultivating, count by the slit flat board.The shortcoming of this slit-agar sampling thief is:

1. accuracy is not high.Owing to do not guarantee the parts of its laminar flow in its structure, turbulent flow and vortex phenomenon can appear, cause the distortion of testing result; Because agar surface can dehydrate in sampling process, make partly collect microorganism deactivated, also can cause error owing to rejection is low.

2. convenient inadequately.When using, must be placed on whole sampling thief in the clean room, then whole sampling thief must be disinfected in advance, wastes time and energy.

The utility model purpose provides a kind of accuracy height, diaphragm-type air borne bacteria sampler easy to use.No matter ventilate or laminar flow condition under, all can be accurately, reproduction and measure the aerial bacterioplankton of clean room easily.

The utility model is realized by following technical scheme.The utility model diaphragm-type air borne bacteria sampler comprises casing 2, fixed interface 6, on the wall of the inlet end of casing 2 fixed interface 6 is housed.Sampling diaphragm 15 is fixed on the fixed interface 6, has surge chamber 18 in the casing 2, aspiration pump 17, laminar flow grid 16.One side of surge chamber 18 links to each other with fixed interface 6, and opposite side and aspiration pump 17 inlets link to each other, and the inlet of laminar flow grid 16 is led in the outlet of aspiration pump 17, on the box body wall of the endpiece of laminar flow grid 16 gas outlet 1 is housed.After aspiration pump 17 sucks laminar flow gas, stable through surge chamber 18 earlier, mobile in proper order through laminar flow grid 16 again by certain direction, to discharge through gas outlet 1, the gas that makes discharge is the laminar flow that single direction flows, and guarantees the velocity-stabilization of sampling air flow, reliable results.All sampling diaphragms 15 are the gelatin diaphragm, are used for the bacterium that swims in the entrapped air.The intrinsic certain humidity of gelatin itself can be not dry, can hold back to maximal efficiency the bacterium that swims of whole biological scope in sampling process.After the sampling, the gelatin diaphragm is placed directly on the agar medium, because gelatin film is water-soluble, can be dissolved in moist media surface, makes the viable microbial of intercepting and capturing on the film directly contact nutrient culture media, can calculate bacterium colony exactly after hatching.This gelatin film sampling diaphragm 15 can be contained on the fixed interface 6 with diaphragm interface 11.Also the lengthening assembly can be housed, it comprises lengthening interface 7, flexible pipe 8 and sampling head.Lengthening interface 7 one ends are connected on the fixed interface 6, and the other end is connected on the flexible pipe 8, and flexible pipe 8 other ends link to each other with sampling head, and sampling diaphragm 15 is contained in the sampling head.This sampling head comprises lengthening interface 9, adaptable interface 12.Diaphragm interface 11, lengthening interface 9 one ends link to each other with flexible pipe 8, and sampling diaphragm 15 is housed in diaphragm interface 11.Promptly when using the lengthening assembly, this sampling diaphragm 15 is not contained on the fixed interface 6.When using, both can be placed on whole sampling thief in the workspace, also can be placed on sampling thief outside the clean room, by the lengthening assembly sampling head is placed in the clean room, carry out air sampling, saved the disinfection of whole sampling thief, also made things convenient for use widely.The rapid-mounted structure as being connected of be connected, extend interface 9 and the adaptable interface 12 of being connected of fixed interface 6 and diaphragm interface 11, fixed interface 6 and lengthening interface 7, adaptable interface 12 and being connected of film interface 11 etc., is all adopted in each interface junction.The cylindrical projection 31 that has wedge shape on the outer round surface 30 of junction has the endoporus projection 33 of wedge shape on the respective interior bores surface 32 that cooperates.When being installed, only need be with two interfaces to good and rotation, the wedge shape projection 31 and 33 on then outer circle and the endoporus, with the web member wedging together; When pulling down, press reverse direction and rotate, then two wedge shapes projection is is separately installed and removed quick and convenient.

In sum, the utility model adopts the gelatin film bacterium that swims in the entrapped air to greatest extent, and adopting the laminar flow grid to make and discharging gas is laminar flow, and what make air enters and discharge state consistency, guarantees that accurately reproducing ground measures, and makes sampled result reliable.The lengthening assembly has enlarged usable range, both can be placed on sampling instrument in the workspace, also can be placed on outside the workspace, only sampling head is placed in the workspace.The rapid-mounted interface structure can make the connected mode of each interface quick, improves work efficiency.The utility model is applicable to that pharmaceuticals industry, medicine, food and beverage industry use.Do concrete introduction with embodiment below.

Fig. 1 is a structural representation of the present utility model; Fig. 2 is the synoptic diagram of lengthening assembly; Fig. 3 is the C place enlarged drawing among Fig. 1,2; Fig. 4 is around the A-A of inner circumferential surface cut-open view among Fig. 3; Fig. 5 is the B-B cut-open view among Fig. 3.

As Fig. 1, handle 3 is housed on the casing 2, control apparatus 20 and timer 21 are equipped with in dividing plate 22 tops, fixedly connect 6 inlet ends that are positioned at casing 2, are fixed on this interface 6 with diaphragm interface 11 diaphragm 15 of will sampling.From fixed interface 6 one sides, be followed successively by surge chamber 18, aspiration pump 17, laminar flow grid 16, gas outlet 1 in the casing 2.These laminar flow grid 16 are staggered screen, and gas is discharged in proper order by a fixed line between screen, keep laminar flow.As Fig. 2, the lengthening interface 7 of lengthening assembly is contained on the fixed interface 6, sampling head is extend in the required workspace through flexible pipe 8, and the lengthening interface 9 in the sampling head joins through adaptable interface 12 and diaphragm interface 11.When adopting the lengthening assembly, this sampling diaphragm 15 is contained in this sampling head, and sampling diaphragm 15 is the gelatin film that German Sartorius (Sartorius) company produces.Fig. 1 shown in Figure 3, C place partial enlarged drawing in 2 is the structure of rapid-mounted interface, i.e. fixed interface 6 and diaphragm interface 11, or the interface of adaptable interface 12 and diaphragm interface 11.As Fig. 4,5, two cylindrical projectioies 31 on outer round surface 30, its phase differential is 180 °, two endoporus projectioies 33 on bore area 32, its phase differential also is 180 °, each projection all is illustrated in figure 4 as the spiral of the wedge shape on the periphery.Being illustrated as has giving an example of two projectioies on each cylindrical or the bore area, as required can be more than two projectioies.When being installed, earlier two projectioies 33 of endoporus spare vacancy 37 from 31 of two projectioies of cylindrical spare is pushed, rotation then, then these two pairs of projectioies are by mating surface 34 wedgings, as shown in Figure 4.Leave tolerance clearance 35,36 in the cooperation place of cylindrical and endoporus.Gap shown in Figure 5 is for the exaggerative technique of painting, so that see structure clearly.When dismounting, with the endoporus counter-rotating, wedge-like engagement face 34 is thrown off, from the vacancy 37 between two projectioies 31 of cylindrical spare, the projection 33 of endoporus spare is withdrawed from.Said structure is all adopted in the interface junction at other place.

Claims (6)

1. diaphragm-type air borne bacteria sampler, comprise casing (2), fixed interface (6), it is characterized in that: the inlet end at casing (2) is equipped with fixed interface (6), sampling diaphragm (15) is fixed on the fixed interface (6), have surge chamber (18), aspiration pump (17), laminar flow grid (16) in the casing (2), one side of surge chamber (18) links to each other with fixed interface (6), opposite side links to each other with aspiration pump (17) inlet, the inlet that laminar flow grid (16) are led in the outlet of aspiration pump (17) is equipped with gas outlet (1) on the casing (2) of the endpiece of laminar flow grid (16).

2. diaphragm-type air borne bacteria sampler according to claim 1 is characterized in that: described sampling diaphragm (15) is to be contained on the fixed interface (6) with diaphragm interface (11).

3. diaphragm-type air borne bacteria sampler according to claim 1 is characterized in that: described sampling diaphragm (15) is the gelatin diaphragm.

4. diaphragm-type air borne bacteria sampler according to claim 1, it is characterized in that: also have the lengthening assembly, comprise lengthening interface (7), flexible pipe (8) and sampling head, one end of lengthening interface (7) is connected on the fixed interface (6), the other end is connected on the flexible pipe (8), the other end of flexible pipe (8) links to each other with sampling head, and sampling diaphragm (15) is contained in the sampling head.

5. diaphragm-type air borne bacteria sampler according to claim 4, it is characterized in that: described sampling head comprises lengthening interface (9), adaptable interface (12), diaphragm interface (11), lengthening interface (9) one ends link to each other with flexible pipe (8), the other end links to each other with adaptable interface (12), diaphragm interface (11) successively, and sampling diaphragm (15) is housed in diaphragm interface (11).

6. according to each described diaphragm-type air borne bacteria sampler in the claim 1 to 5, it is characterized in that: the structure of each interface junction is, the cylindrical projection (31) that has wedge shape on outer round surface (30) has the endoporus projection (33) of wedge shape on the respective interior bores surface (32) that cooperates.

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