CN201313014Y - liquid microfiltration device - Google Patents

Abstract

The utility model discloses a liquid micro filtering device. The liquid micro filtering device comprises a front conduit (2) and a filter (3). The outlet end of the front conduit (2) is connected with an inlet of the filter (3) in detachable and sealing manners, and the inlet of the front conduit (2) is connected with a pressuring device (1) in a sealing manner. The liquid micro filtering device has the characteristics that: the miniaturization of the filtering device is realized, the structure is simple as well as convenient, and the filtering efficiency is high; the liquid micro filtering device can be repeatedly used, reduces working cost and improves working efficiency.

Description

The liquid micro filter

Technical field

The utility model belongs to the filter apparatus for filtering liquid technical field, is specifically related to the used liquid micro filter in a kind of laboratory.

Background technology

The device that is used for liquid filtering is divided into positive pressure type and negative-pressure type two classes, and the positive pressure type filter is used for the filtration of small amount of liquid more, as several milliliters to tens milliliters, promptly belongs to miniature filter; The negative-pressure type filter then is used for the filtration of big quantity of fluid, and tens milliliters to the hundreds of milliliter, and even thousands of milliliter.Existing miniature filter has the needle tubing filter, pre-filtered liquid need be packed in the needle tubing, applies positive pressure by the pushing syringe piston, makes liquid reach the purpose of filtration by filtrating chip.Needle tubing is generally glass needle tubing and disposable plastic needle tubing, and the former can reuse.But the glass needle tubing requires needle tubing piston and sleeve pipe strictness to be sealed and matched, and this filtration to a large amount of different samples is quite difficult.And the latter adopts the disposable medical syringe, but then inapplicable to some strong liquid flux of corrosivity, and use cost is also higher relatively.Also have a kind of microfiltration apparatus, promptly have the sampling suction nozzle or the filling gun head filter of filter membrane or filter post, be applicable to the micro liquid of molecular level research usually, use cost is higher, is difficult to be suitable for the filtration of milliliter level liquid.In the real work, tend to run into the filtration of several ml samples in enormous quantities, as analytical equipments such as gas chromatograph, liquid chromatograph, ion chromatograph, Continuous Flow Analysis instrument, it is all little to analyze required sample size, but the sample number of measuring simultaneously is a lot of again.All need before the sample on these instruments to filter, for adapting to large batch of filtration needs, the design people is through long-term practice, developed a kind of features simple structure, filter efficient and reusable liquid micro filter, overcome the deficiencies in the prior art well, evidence, effect is good.

The utility model content

The purpose of this utility model is to provide a kind of features simple structure, filters efficient and reusable liquid micro filter.

The purpose of this utility model is achieved in that and comprises dummy pipe, filter, the dismantled and assembled sealed attachment of the dummy pipe port of export and filter inlet, dummy pipe entrance point sealed attachment device for exerting.

The combination that the utility model utilizes the existing experiment in laboratory utensil has realized the microminiaturization of filter, and features simple structure is filtered efficiently, and reusable.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described, but never in any form the utility model is limited.

Accompanying drawing is that the utility model overall structure is partly cutd open schematic diagram.

Wherein: 1 is that device for exerting, 2 is that dummy pipe, 3 is filter.

The specific embodiment

As shown in the figure, the utility model comprisesdummy pipe 2,filter 3,dummy pipe 2 ports of export and the dismantled and assembled sealed attachment offilter 3 imports,dummy pipe 2 entrance point sealed attachment device for exerting 1.

Describedfilter 3 is the syringe filters of disposable or interchangeable film.

Described dummy pipe (2) is 5 milliliters or 10 milliliters take a sample suction nozzle or filling gun heads.

Described device for exerting (1) is a rubber pipette bulb.

The course of work of the present utility model:

The dummy pipe outlet is connected with the inlet seal of filter, in dummy pipe, add an amount of liquid to be filtered, again with device for exerting outlet and dummy pipe entrance point sealed attachment, appropriateness extruding device for exerting, pressure air enters dummy pipe, promote liquid and flow through filter membrane, flow in the sampling bottle and finish filter process.

Characteristics of the present utility model:

1, efficient height. Use the utility model liquid micro filtering device, 1 people filters 20 about 1 milliliter Sample only need 15 minutes, and the glass needle tubing of prior art filters, and filters 20 about samples of 1 milliliter Need 25 minutes, working effect has improved 40%.

2, easy to use. The operation of device for exerting is more laborsaving than the pushing syringe piston, can one-handed performance. Each parts is reusable, and suitability is stronger, can save the time of filtering front complement.

3, with low cost. The utility model is reusable, greatly reduces use cost.

Claims (4)

Translated fromChinese

1、一种液体微型过滤装置，包括前导管(2)、过滤器(3)，其特征是：前导管(2)出口端与过滤器(3)进口可拆装密封联接，前导管(2)进口端密封联接施压装置(1)。1. A micro-filtering device for liquid, comprising a front conduit (2) and a filter (3), characterized in that: the outlet of the front conduit (2) is connected to the inlet of the filter (3) in a detachable and sealed connection, and the front conduit (2) ) The inlet end is sealed and connected to the pressure applying device (1).2、如权利要求1所述的液体微型过滤装置，其特征是：过滤器(3)为一次性或可换膜的针头过滤器。2. The liquid microfiltration device according to claim 1, characterized in that: the filter (3) is a syringe filter with a disposable or replaceable membrane.3、如权利要求1所述的液体微型过滤装置，其特征是：所述的前导管(2)为5毫升或10毫升取样吸头或注射枪头。3. The liquid microfiltration device according to claim 1, characterized in that: the front conduit (2) is a 5ml or 10ml sampling tip or an injection gun tip.4、如权利要求1所述的液体微型过滤装置，其特征是：所述的施压装置(1)为吸耳球。4. The liquid microfiltration device according to claim 1, characterized in that: the pressure applying device (1) is an ear-suction ball.

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