CN205340841U - Anti -pollution repeatedly usable's liquid -transfering gun head - Google Patents

Abstract

The utility model relates to an experimental device field specifically is an anti -pollution repeatedly usable's liquid -transfering gun head, but used repeatedly behind the autoclaving. An anti -pollution liquid -transfering gun head, includes rifle head main part, rifle head main part top is equipped with detachable and keeps off and flow the stopper, keep off and flow the stopper for the bottom is equipped with the open -ended taper shape, keeps off flowing beyond the great wall marginal limit and turning up, with the closely laminating of rifle head main part upper portion evagination part, keeps off and flows the stopper lateral wall and acutangulate with rifle head lateral wall. It is most advanced that the directional rifle head of plug tip end keep off to be flowed in the toper, fills in the overhead end of rifle, keeps off flowing stopper lateral wall and rifle head inner wall and being an acute angle angle, flows between the stopper pressure and make to keep off and flow stopper base and rifle head inner wall zonulae occludens with keeping off with the help of rifle head inner wall, and during the use, the handle is pressed to the release pipettor, even the raffinate suck -back can be blockked also that it blocks to fill in the lateral wall, plays the effect of prevent pollution in the rifle head.

Description

A kind of anti-pollution reusable liquid transfer gun head

Technical field

This utility model relates to experiment equipment field, is specially the liquid transfer gun head that a kind of anti-suck is polluted, can reuse after autoclaving.

Background technology

Liquid-transfering gun and liquid transfer gun head are experiment common instruments, and conventional liquid transfer gun head simple in construction is with low cost, uses after being suitable to autoclaving.Pipettor use is followed " slow suction is put soon " principle and liquid suck-back generally can be avoided to pollute, but 5ml pipettor uses conventional rifle head volume big, liquid residue is more, repeatedly blow and beat also more difficult blowing, in addition 5ml liquid-transfering gun suction is bigger, even if slow releasing pressing hands handle, residual liquid is likely to along rifle head inwall up, even touch rifle head, rifle head is not only caused to pollute, also result in experiment sample to pollute, Chinese patent notification number is: a kind of antipollution liquid transfer gun head of the patent announcement of CN201361552Y, by adding a bending section on the body of liquid transfer gun head, make, lower two parts cone pipe does not come anti-pollution on same vertical curve.Chinese patent notification number is: the patent announcement of the CN202162005U liquid transfer gun head of a kind of anti-pumpback, carrys out anti-pumpback by adding anti-pumpback bulge loop together in the nearly upper end of liquid transfer gun head.Chinese patent notification number is: a kind of liquid transfer gun head with filter element of the patent announcement of CN102921483A, anti-pollution by filter element.Chinese patent notification number is: a kind of antipollution liquid transfer gun head of the patent announcement of CN203971972U, by adding one in liquid transfer gun head theme upper end, cylindrical small lid with holes is anti-pollution.Owing to Chinese patent notification number is: patent and the Chinese patent notification number of CN201361552Y be: the patent of CN202162005U all changes the structure of liquid transfer gun head, therefore the processing mold changing liquid transfer gun head just can complete, and Chinese patent notification number is: the patent of CN102921483A to increase high-density glass fiber, the shortcoming therefore with technique, technical sophistication, and Chinese patent notification number is: the patent tegillum not easy cleaning of CN203971972U, non-exchange, cause rifle head cannot circulate sterilizing and use.

Summary of the invention

For the above-mentioned problems in the prior art, the purpose of this utility model is in that design provides a kind of rifle head preventing liquid suck-back from polluting, and it is a back taper core structure, adopts common plastics material, easy to use, detachably, high pressure resistant sterilizing, reusable, it is suitable for existing most of rifle head, without transforming rifle header structure, with low cost, can effectively prevent liquid Suction contamination rifle head and laboratory sample.

A kind of antipollution liquid transfer gun head, including rifle head main body, rifle head main body top is provided with dismountable baffle plug, baffle plug is the cone that bottom is provided with opening, and baffle marginal edge beyond the Great Wall is turned up, fitting tightly with rifle head main body top concave portion, baffle plug sidewall and rifle rostral wall acutangulate.

Preferably, described baffle plug sidewall is elastomeric material.

It is most advanced and sophisticated that taper baffle plug tip end points to rifle head, fill in rifle head upper end, baffle plug sidewall and rifle head inwall are a sharp angle, baffle plug base and rifle head inwall compact siro spinning technology is made by pressure between rifle head inwall and baffle plug, during use, release pipettor pressing handle, even if residual liquid suck-back also can be blocked plug sidewall stop in rifle head, plays the effect preventing polluting.

Compared with prior art, of the present utility model it is distinctive in that: add with taper baffle plug on original rifle head basis, the residual liquid that effectively prevents resorption moves the situation polluting rifle head on rifle head inwall and occurs, it is to avoid pollution, and design is simple simultaneously, without changing existing rifle header structure, taper baffle plug makes simple, detachably, it is easy to cleans or changes, meet experimenter and reuse the needs of rifle head, be suitable for promotion and implementation.

Accompanying drawing explanation

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

Fig. 2 is this utility model profile.

Detailed description of the invention

Below in conjunction with Figure of description, the utility model is described in further detail.

As shown in the figure, this anti-pollution rifle head includes rifle head main body 1 and taper baffle plug 2, including liquid-transfering gun main body 1, inverted cone baffle plug 2, opening 3, liquid-transfering gun main body 1 top is provided with a taper baffle plug 2, and described taper baffle plug 2 side is enclosed construction, baffle plug 2 sidewall and rifle head lower sides acutangulate, there are an opening 3, described taper baffle plug 2 base and rifle head main body 1 compact siro spinning technology in described inverted cone baffle plug 2 top, detachably.

Time actually used, only inverted cone baffle plug 2 need to be put into from rifle head main body 1 top, firmly compress, baffle plug 2 base is identical with rifle head internal diameter, by pressure effect between the two, baffle plug 2 base and rifle head main body 1 inwall fit tightly, and utilize and fall sharply formed by rifle head lower inner wall baffle plug 2 sidewall, can block the liquid along the backflow of rifle head inwall.Baffle plug is detachable, it is simple to clean, and adopts polypropylene material, and high temperature high voltage resistant sterilizing, reusable practicality is extremely strong.

Claims (2)

1. an antipollution liquid transfer gun head, including rifle head main body (1), it is characterized in that: rifle head main body (1) top is provided with dismountable baffle plug (2), baffle plug (2) is provided with the cone of opening for bottom, baffle plug (2) top rim turns up, fitting tightly with rifle head main body (1) top concave portion, baffle plug (2) sidewall and rifle rostral wall acutangulate.

2. antipollution liquid transfer gun head according to claim 1, it is characterised in that: described baffle plug (2) sidewall is elastomeric material.