CN2458614Y

CN2458614Y - Fluid connecting vessel end with non-return function

Info

Publication number: CN2458614Y
Application number: CN 00253265
Authority: CN
Inventors: 于光; 张泽成
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-11-30
Filing date: 2000-11-30
Publication date: 2001-11-07
Anticipated expiration: 2010-11-30

Abstract

The utility model relates to a liquid flow end with non-return function of a communicating vessel, which comprises an upper shell and a lower shell. The bottoms of the upper shell and the lower shell are communicated with a liquid guiding pipe. The utility model is characterized in that a dividing piece is fixed in the lower shell, a micropore is arranged on the dividing piece, wherein, the upper face of which is provided with a joint and the upper shell, and an inner cavity is formed between the bottom of the joint and the dividing piece. The upper shell and a joint opening are communicated with the inner cavity. A non-return valve in a liquid detecting instrument is replaced by the structure of the utility model, liquid can be prevented from being contaminated, and an instrumental structure can be simplified, volume is diminished, and cost is lowered.

Description

A kind of liquid flowing connection device termination with the check function

The utility model relates to the liquid flowing connection device termination of the band check function that a kind of automatic fluid detecting instrument uses.

In the fluid analysis assay apparatus of robotization, except wanting draw samples, also to extract one or more reagent.Extract back backflow pollution reagent for fear of liquid reagent, generally one or more reverse checkvalves will be installed on the fluid flow tube road, and need controller that devices such as corresponding interface are arranged simultaneously.Therefore cause the complex structure of existing fluid analysis assay apparatus, bulky, and cost is higher.

The purpose of this utility model provides the liquid flowing connection device termination of the band check function that a kind of liquid detecting instrument device uses, and it can simplify the structure of instrument, dwindles the volume of instrument, the cost of lowering apparatus.

The purpose of this utility model is achieved in that it comprises upper shell and lower house, housing bottom is connected with catheter, it is characterized in that the lower house internal fixation has a partition, have micropore on the partition, joint and upper shell are housed on partition, form inner chamber between joint bottom and the partition, upper shell and joint perforate communicate with inner chamber.

Said structure of the present utility model has been cancelled the reverse checkvalve in the primary liquid detecting instrument, both can prevent that liquid is contaminated, can make the designs simplification of instrument simultaneously, volume-diminished, and also cost also is reduced.

Below in conjunction with drawings and Examples the utility model is further described.

Fig. 1 is a structure cut-away view of the present utility model;

Fig. 2 is the synoptic diagram of partition part surface tension force of the present utility model.

1 is upper shell among the figure, the 2nd, and lower house, the 3rd, joint, the 4th, partition, the 5th, catheter.

With reference to Fig. 1, the partition that adopts rubber or other similar material to make is contained in the lower house, one micropore is arranged on the partition, joint and upper shell are housed on partition, partition is pressed abd fixed on the bottom of lower house by joint and upper shell, the lower end of joint is a concave surface, and form cavity between the partition, for convenient sampling syringe needle inserts, the upper end of joint and upper shell are made concave surface too, and have the hole, communicate with cavity, the through hole of having gone to the bottom of lower house, and be connected with catheter, the other end of catheter is connected with reservoir.

When the aperture of syringe needle by upper shell 1 of taking a sample enters joint 3 extraction liquid, all be full of liquid in the inner chamber of whole conduit 5 and joint 3; When sampling finished, the sampling syringe needle was extracted, and because of the effect of atmosphere, liquid begins to reflux; When liquid level arrived partition 4, surface tension acted on as shown in Figure 2 at the micropore place, and the direction of power upwards; When with the gravitational equilibrium of liquid, liquid had both stopped refluxing; Micropore is more little, and capillary effect is big more; Here, micropore is small enough to hold liquid; Like this because of the liquid that refluxes seldom, and it just has been pumped to and has not also had contaminatedly in the conduit, and that a part of liquid that contacts with atmosphere is held the epimere that rests on conduit by partition 4, is drawn out of next time when taking a sample and throws away.So just prevented that reagent is contaminated when detecting chemical examination.

Claims

1, a kind of liquid flowing connection device termination with the check function, it comprises upper shell and lower house, housing bottom is connected with catheter, it is characterized in that the lower house internal fixation has a partition, have micropore on the partition, joint and upper shell are housed on partition, form inner chamber between joint bottom and the partition, upper shell and joint perforate communicate with inner chamber.

2,, it is characterized in that the joint bottom surface is a concave surface, is pressed on the partition according to the said liquid flowing connection device of claim 1 termination.

3,, it is characterized in that upper end of joint face and upper shell are concave surface according to the said liquid flowing connection device of claim 1 termination.