CN207823050U - The novel liquid-transfering device of liquid is taken for draught cupboard - Google Patents

Abstract

The utility model discloses a kind of novel liquid-transfering devices taking liquid for draught cupboard, it includes injection mechanism, connection flexible pipe, measuring pipet, magnetic one-way valve and the holder for being fixed on measuring pipet in draught cupboard, and injection mechanism is connected by the top port sealing of connection flexible pipe and measuring pipet；One end of connection flexible pipe is connected by the injection tube of adapter coupling and injection mechanism, and the other end of connection flexible pipe and the top port sealing of measuring pipet connect；Tapered suction inlet is designed in the bottom end imbibition port of measuring pipet, and magnetic one-way valve is arranged in the taper suction inlet, and magnetic one-way valve includes one-way fluid channel and magnetic floating valve, and magnetic floating valve is arranged in one-way fluid channel, and the lateral wall of measuring pipet is equipped with magnet ring.The utility model need not use ear washing bulb, not only solve the problem of conventional practice inconvenience, also largely alleviate the feeling of fatigue of experimenter's long-time liquid relief behaviour, improve accuracy, the effective guarantee experimenter's experiment safety of liquid relief.

Description

The novel liquid-transfering device of liquid is taken for draught cupboard

Technical field

The utility model is related to a kind of liquid-transfering devices, it particularly relates to which a kind of be used in environment measuring engineering experiment The novel liquid-transfering device of the toxic extractant of high volatility is quantitatively pipetted in draught cupboard.

Background technology

Draught cupboard is the primary barrier that protection staff prevents toxic chemical flue gas from endangering, after it can be as important safety Equipment is helped, as in chemical experiment procedure failure, pernicious gas is effectively discharged when generating in chemical fumes, dust and toxic gas, protects Protect staff and laboratory environment.Pipette is that solution for accurately measuring certain volume measures formula instrument, in environment Need quantitatively to be pipetted the organic extractant solution agent for gas or liquid monitoring in monitoring with measuring pipet, traditional method is logical The mode for crossing ear washing bulb air-breathing carries out taking liquid using measuring pipet.It is quantitatively pipetted with volatility during environment measuring engineering experiment Toxic organic extractant usually require to carry out that liquid is taken to operate in draught cupboard using pipette, but divulged information using pipette When taking liquid in cupboard, needing experimenter's both hands to stretch into draught cupboard and operate, experimenter needs a hand to operate ear washing bulb, Another hand operates pipette, and not only inconvenient for operation, long-time operation can feel fatigue and influence the accuracy of liquid relief, and The drop-down window of draught cupboard can only be pulled down to isolation experiment personnel's face mouth and nose position since both hands stretch into draught cupboard, however still The volatile toxic substance effusion of part is had in experimenter's suction body, this is just unfavorable for the health of experimenter, for a long time The experiment safety of experimenter can be seriously threatened by sucking toxic escaping gas also.Therefore, it is necessary to design one kind not needing Use ear washing bulb, feeling of fatigue, the use of effective guarantee experimenter's experiment safety easy to operate, that reduce experimenter's experimental implementation The novel liquid-transfering device of liquid is taken in draught cupboard.

Utility model content

For above deficiency, the utility model, which provides one kind, need not use ear washing bulb, easy to operate, reduction experiment The feeling of fatigue of personnel's experimental implementation, the novel liquid-transfering device that liquid is taken for draught cupboard of effective guarantee experimenter's experiment safety, It includes injection mechanism, connection flexible pipe, measuring pipet, magnetic one-way valve and the holder for being fixed on measuring pipet in draught cupboard, The injection mechanism include injection tube, piston, push-pull rod, pull rod handle, movable push bar, pressing handle, reset helical spring and Silica gel plug, the piston are slidably installed in the circular cylinder intracavitary of the injection tube, and the bottom end of the push-pull rod is fixedly connected on described On the upper surface of piston, the one end of the push-pull rod far from piston is equipped with pull rod handle, and the bottom end of the injection tube is equipped with injection Interface, it is described to inject the adapter coupling being arranged on interface for being tightly connected with the measuring pipet top end opening, the push-and-pull Bar is internally provided with the hollow cavity extended along push-pull rod length direction, and the movable push bar is plugged in the hollow cavity, The bottom end of the movable push bar is fixedly connected with silica gel plug, and the bottom end opening of the hollow cavity is corresponded on the piston Position, which is equipped with, allows the freely through through-hole of silica gel plug, and the bottom end opening sealing of the silica gel plug and the hollow cavity is matched It closes, the top of the movable push bar is fixedly connected with pressing handle, and the madial wall of the hollow cavity is equipped with limit baffle ring, institute It states reset helical spring to be set on movable push bar, and the reset helical spring is located at the pressing handle and the limiting block Between ring, screens bulge loop is equipped with corresponding to the lower position of the limit baffle ring on the movable push bar；The connection flexible pipe One end is connect by adapter coupling with the injection tube, and the other end of the connection flexible pipe and the top port sealing of measuring pipet connect It connects；Tapered suction inlet is designed in the bottom end imbibition port of the measuring pipet, and the magnetic one-way valve is arranged in the taper suction inlet, The magnetic one-way valve includes one-way fluid channel and magnetic floating valve, and the magnetic floating valve is arranged in the one-way fluid channel It is interior, it is equipped with magnet ring corresponding to the position in the one-way fluid channel on the lateral wall of the measuring pipet, the magnetic floating valve is to adopt The hollow ball made of magnetic material, the magnet ring are matched with the magnetic floating valve, to utilize magnetic floating valve to unidirectional Fluid channel is blocked and realizes the function of check valve.

In order to further realize the present invention, the outer surface of the magnetic floating valve is coated with rubber membrane.

In order to further realize the present invention, the outer surface of the magnetic floating valve is coated with pellosil.

In order to further realize the present invention, the one-way fluid channel by interconnected tapered channel, Vertical Channel and Limit channels three parts form, and the magnetic floating valve is arranged in the tapered channel, and the internal diameter of the tapered channel is by amount liquid The direction of tube top end to measuring pipet bottom end is gradually reduced, and the diameter of the magnetic floating valve is more than straight at tapered channel lowest calibre Diameter.

The beneficial effects of the utility model：

Measuring pipet, can be fixed by the bracket installation by 1, the novel liquid-transfering device that liquid is taken for draught cupboard of the utility model In draught cupboard, the drawing window of draught cupboard is pulled down completely to the abdomen of human body, will can effectively have volatile toxic extraction Agent is adequately isolated with experimenter, and experimenter, which can be drawn the injection mechanism outside draught cupboard by connection flexible pipe and be manipulated, leads to Measuring pipet in wind cupboard with volatile toxic extractant to measuring, not only so that experimenter need not stretch both hands Enter in draught cupboard and operated, also significantly reduces the possibility that volatile toxic gas in draught cupboard endangers experimenter Property, fully ensure the safety of experimenter's experimental implementation.The utility model makes experimenter that need not stretch into both hands (experimenter needs a hand operation ear washing bulb, another hand to operate pipette) is operated in draught cupboard, is not only solved The problem of conventional practice inconvenience also largely alleviates the feeling of fatigue of experimenter's long-time liquid relief behaviour, into one Step improves the accuracy of liquid relief.

2, the novel liquid-transfering device that liquid is taken for draught cupboard of the utility model, it includes injection tube, piston, push-and-pull to be equipped with Bar, pull rod handle, movable push bar, pressing handle, the injection mechanism for resetting helical spring and silica gel plug component, pass through pull rod hand Handle pushes and pulls downwards push-pull rod so that piston moves down along the circular cylinder chamber inner sidewall of injection tube and drains the circle of injection tube Air in barrel chamber, then push-pull rod is pushed and pulled by pull rod handle upwards so that piston along injection tube circular cylinder chamber inner sidewall It moves up and the formation suction of circular cylinder intracavitary in injection tube, to make in the negative pressure of the circular cylinder intracavitary of injection tube Under, extractant to be pipetted enters the taper suction inlet of measuring pipet, and extractant to be pipetted will constantly be inhaled into measuring pipet In liquid storage cylinder, when the extractant excess in measuring pipet, it need to only slow transit through pressing handle compression and reset helical spring and push Movable push bar is moved downward along the hollow cavity of push-pull rod, and movable push bar pushes downwards its bottom end open during moving down Silica gel plug, open the hollow cavity bottom end opening of push-pull rod so that the top end opening of measuring pipet pass sequentially through crossover sub, Injection tube, push-pull rod hollow cavity be connected to ambient atmosphere, from extractant extra in measuring pipet slowly can be discharged, wait for When the liquid level of measuring pipet reaches the graduation mark for measuring required solvent, pressing handle is unclamped, in the work of the reset helical spring of compression Under, movable push bar is jacked up upwards, and the silica gel plug of movable push bar bottom end tightly blocks the bottom end of the hollow cavity of push-pull rod Opening generates leakage since gravity declines to avoid the extractant liquid drawn in measuring pipet and influences the accurate of liquid relief Degree, to reach liquid relief fast and accurately effect.When the extractant of measuring pipet will be flow to end, repeatedly can quickly press repeatedly Pull rod handle to blow on measuring pipet inner wall absorption or remaining extractant drop using the positive pressure gas flow formed in injection tube, Reach liquid relief fast and accurately effect.The utility model compared with the existing technology, is not required to during using pipette liquid relief Block the nozzle of pipette with index finger, and can be needed for accurate measuring experiment extractant so that it is residual on liquid relief tube wall The extractant drop stayed quickly blows off pipette, overcomes in traditional technology " because index finger operation is immature or is made using fatigue Fail at liquid relief, to need to make repeated attempts, operation and control difficulty is big, causes liquid relief inaccurate " defect.

3, the novel liquid-transfering device that liquid is taken for draught cupboard of the utility model, the bottom end imbibition port design of measuring pipet Tapered suction inlet, magnetic one-way valve are arranged in taper suction inlet, and the utility model not only can be disposable in the control of liquid-transfering gun The extractant of large capacity is measured, amount liquid is accurate, and the position for corresponding to tapered channel on the lateral wall of love pipette is equipped with magnetic Ring has magnetic ball valve and is coordinated by magnetic with magnet ring so that for pipette after negative pressure absorbing extract liquor, ball valve can be steady Admittedly be adsorbed on one-way fluid channel tapered channel liquid outlet position, with pass through the cooperation of ball valve and magnet ring realize pipette Unidirectionally open its taper suction inlet so that the extractant liquid drawn in pipette will not flow out liquid relief because gravity declines Pipe, on the one hand can reach liquid relief fast and accurately effect, and pipette on the other hand may be implemented and carry out repeated multiple times washing lotion, with Realize that quantifying for large capacity extractant pipettes.

4, the novel liquid-transfering device that liquid is taken for draught cupboard of the utility model, the tapered channel of magnetic one-way valve is by resistance to Either the outer surface cladding a thin layer rubber membrane or pellosil of ball valve is made in silica gel material to the anti-aging rubber material of burn into, On the one hand so that ball valve has corrosion resistance, effectively extend the service life of ball valve；On the other hand so that the tool on ball valve surface layer Flexible flexible film fits closely with tapered channel and reaches more sealing blocking effect.

Description of the drawings

Fig. 1 is the structural schematic diagram of the utility model；

Fig. 2 is the injection mechanism structural schematic diagram of the utility model；

Fig. 3 is the structural schematic diagram in draught cupboard when pipetting of the utility model.

Specific implementation mode

The utility model is further elaborated below in conjunction with the accompanying drawings, wherein the direction of the utility model is mark with Fig. 1 It is accurate.

As shown in Fig. 1 to 2 figures, the novel liquid-transfering device that liquid is taken for draught cupboard of the utility model, it includes injector Structure 1, connection flexible pipe 2, measuring pipet 3, magnetic one-way valve 4 and the holder 5 for measuring pipet 3 to be clamped, wherein：

Injection mechanism 1 includes injection tube 11, piston 12, push-pull rod 13, pull rod handle 14, movable push bar 15, pressing handle 16, helical spring 17 and silica gel plug 18 are resetted, injection tube 11 is in longitudinally disposed, and 11 side wall of injection tube is equipped with graduation mark.It is living Plug 12 is slidably installed in the circular cylinder intracavitary of injection tube 11, and the bottom end of push-pull rod 13 is fixedly connected on the upper surface (piston 12 of piston 12 The one side of the measuring pipet 3 deviated from) on, made up and down in the circular cylinder intracavitary of injection tube 11 with pushing and pulling piston 12 by push-pull rod 13 Reciprocal movement.

The one end of push-pull rod 13 far from piston 12 is equipped with convenient for the pull rod handle 14 of push-and-pull push-pull rod 13, and injection tube 11 deviates from One end outer periphery of 3 tube body of measuring pipet is equipped with convenient for the auxiliary bulge loop 19 of push-and-pull push-pull rod 13, on the lateral wall of injection tube 11 Equipped with graduation mark.The bottom end of injection tube 11 is equipped with the injection interface being connected with injection tube 11, is arranged with and is used on injection interface The adapter coupling being tightly connected with 3 top end opening of measuring pipet, adapter coupling are made of rubber material or silica gel material.Push-and-pull Bar 13 is internally provided with the hollow cavity 131 extended along 13 length direction of push-pull rod, and movable push bar 15 is plugged in push-pull rod 13 In hollow cavity 131, the bottom end of movable push bar 15 is fixedly connected with silica gel plug 18, corresponds in push-pull rod 13 on piston 12 The position of the bottom end opening of empty inner cavity 131, which is equipped with, allows 18 freely through through-hole 121 of silica gel plug, silica gel plug 18 and push-and-pull The bottom end opening sealing cooperation of the hollow cavity 131 of bar 13, the top of movable push bar 15 are fixedly connected with pressing handle 16, push-and-pull The madial wall of the hollow cavity 131 of bar 13 is equipped with limit baffle ring 132, resets helical spring 17 and is set on movable push bar 15, And reset helical spring 17 be located at pressing handle 16 and limit baffle ring 132 between, reset helical spring 17 top contradict by On the lower surface for pressing handle 16, the bottom end for resetting helical spring 17 contradicts on the upper surface of limit baffle ring 132, is resetting spiral When spring 17 is in the first operating position of uncompressed state, resets helical spring 17 and withstand the pressing handle on movable push bar 15 1, so that the silica gel plug 18 of 15 bottom end of movable push bar tightly blocks the bottom end opening of the hollow cavity 131 of push-pull rod 13. The hollow cavity 131 that movable push bar 15 is ejected push-pull rod 13 by helical spring 17 is resetted in order to prevent, is corresponded on movable push bar 15 It is additionally provided with screens bulge loop 151 in the lower section of limit baffle ring 132, jacks up movable push bar 15 upwards so that resetting helical spring 17 When, due to the cooperation of limit baffle ring 132 and screens bulge loop 151, movable push bar 15 is limited into the hollow cavity 131 in push-pull rod 13 It is interior.

Connection flexible pipe 2 is the elongated flexible tube made of corrosion-resistant, anti-aging rubber material or silica gel material, and connection is soft One end of pipe 2 is connect by adapter coupling with the injection tube 11 of injection mechanism 1, and the other end of connection flexible pipe 2 passes through sealed connection Set 21 is connect with the top port sealing of measuring pipet 3.Measuring pipet 3 is the glass pipet that capacity is 5~50ml, outside measuring pipet 3 Side wall is equipped with convenient for measuring the scale of extract liquor, and tapered suction inlet 31 is designed in the bottom end imbibition port of measuring pipet 3.Measuring pipet 3 Be fixed on holder 5 so that the length direction and horizontal plane of measuring pipet 3, in order to measuring pipet 3 pipette extractant and Convenient for the liquid level in observation measuring pipet 3.

Magnetic one-way valve 4 is arranged in the taper suction inlet 31 of measuring pipet 3, and magnetic one-way valve 6 includes one-way fluid channel 41 With magnetic floating valve 42, magnetic floating valve 42 is arranged in one-way fluid channel 41.One-way fluid channel 41 is by interconnected taper The cone in one-way fluid channel 41 is arranged in channel 411, Vertical Channel 412 and 413 three parts of limit channels composition, magnetic floating valve 42 In shape channel 411 and Vertical Channel 412, so that magnetic floating valve 42 can be made up and down in tapered channel 411 and Vertical Channel 412 It moves back and forth.Tapered channel 411 and Vertical Channel 412 are extended along the axial direction of measuring pipet 3, and tapered channel 411 Internal diameter gradually increased by the direction on taper suction inlet 31 to 3 top of measuring pipet of 3 bottom end of measuring pipet, the diameter of magnetic floating valve 42 is big Diameter at 411 lowest calibre of tapered channel, so that the least significant end that magnetic floating valve 42 is located at tapered channel 411 can block Firmly tapered channel 411.Tapered channel 411 is made of corrosion-resistant, anti-aging rubber material or silica gel material, magnetic floating valve 42 The magnetic hollow ball of tool is made using magnetic material, hollow ball is also made of the magnetic lightweight metal material of tool, The outer surface cladding a thin layer rubber membrane or pellosil of magnetic floating valve 42, on the one hand so that magnetic floating valve 42 has corrosion resistance Can, on the other hand so that the flexible flexible film on 42 surface layer of magnetic floating valve fits closely with tapered channel 411 and reached More sealing blocking effect.It is equipped with magnet ring corresponding to the position of tapered channel 411 on the lateral wall of measuring pipet 3, there is magnetism Magnetic floating valve 42 coordinated by magnetic with magnet ring so that for measuring pipet 3 after negative pressure absorbing extract liquor, magnetic floating valve 42 can It is firmly adsorbed on the position of 411 liquid outlet of tapered channel in one-way fluid channel 41, to pass through magnetic floating valve 42 and magnet ring Cooperation realizes that measuring pipet 3 unidirectionally opens its taper suction inlet 31 so that the extractant liquid drawn in measuring pipet 3 will not be because of gravity Effect declines and flows out measuring pipet 3, on the one hand can reach liquid relief fast and accurately effect, measuring pipet on the other hand may be implemented 3 carry out repeated multiple times washing lotion, to realize that quantifying for large capacity extractant pipettes.

The basic functional principle of the novel liquid-transfering device that liquid is taken for draught cupboard of the utility model：As shown in figure 3, first First, 3 state in a vertical shape of measuring pipet is fixedly mounted on the holder 5 in draught cupboard 10, and makes the taper suction inlet 22 of measuring pipet 3 The liquid level of extractant to be pipetted is inserted into hereinafter, pulling down the drawing window 20 on draught cupboard 10, there will be volatile toxic extractant Be isolated with the mouth and nose of experimenter, to be effectively ensured experimenter experimental implementation safety；Secondly, experimenter can be with The compression of pressing handle 16 that the injection mechanism 1 outside draught cupboard 10 is drawn by connection flexible pipe 2 resets helical spring 17 and pushes work Dynamic push rod 15 is moved downward along the hollow cavity 131 of push-pull rod 13, and movable push bar 15 pushes down on during moving down The silica gel plug 18 of its bottom end is opened, 131 bottom end opening of hollow cavity of push-pull rod 13 is opened, in the hollow cavity of push-pull rod 13 131 bottom end openings open after again pass through pull rod handle 14 downwards push-and-pull push-pull rod 13 so that piston 12 along injection tube 11 circle Shape barrel chamber madial wall moves down and drains the air of the circular cylinder intracavitary of injection tube 11, pressing handle 16 is unclamped, in compression Under the action of resetting helical spring 17, movable push bar 15 is jacked up upwards, and the silica gel plug 18 of 15 bottom end of movable push bar tightly blocks The firmly bottom end opening of the hollow cavity 131 of push-pull rod 13 so that injection mechanism 1 forms a pot type piston syringe；Again, lead to Cross the push-and-pull push-pull rod 13 upwards of pull rod handle 14 so that piston 12 moves up simultaneously along the circular cylinder chamber inner sidewall of injection tube 11 In the formation suction of the circular cylinder intracavitary of injection tube 11, thus under the suction function of the circular cylinder intracavitary of injection tube 11, Extractant to be pipetted enters the taper suction inlet 31 of measuring pipet 3, and overcomes the magnetic floating valve 42 and magnetic being arranged in tapered channel 411 Adsorption capacity between ring and the liquid outlet of float valve 42 from tapered channel 411 is open-top so that tapered channel 411 open and with amount liquid The liquid storage pipe of pipe 3 is connected.Under the suction function of the circular cylinder intracavitary of injection tube 11, extractant to be pipetted will continuous quilt It sucks in the liquid storage pipe of measuring pipet 3, when stopping through the push-and-pull push-pull rod 13 upwards of pull rod handle 14, is arranged in tapered channel It adsorbs between 411 magnetic floating valve 42 and magnet ring, leads to which magnetic floating valve 42 can be firmly adsorbed on one-way fluid again The position of 411 liquid outlet of tapered channel in road 41, to realize that measuring pipet 3 is unidirectionally opened by the cooperation of magnetic floating valve 42 and magnet ring Its taper suction inlet 31 so that the extractant liquid drawn in measuring pipet 3 will not flow out measuring pipet 3 because gravity declines, So as to achieve the purpose that safely, fast and accurately smoothly to pipette in draught cupboard 10 with volatile toxic extractant, The safety of the experimental implementation of experimenter is effectively ensured.

The foregoing is merely the better embodiments of the present invention, and the invention is not limited in the above embodiments, are implementing There may be the small structural modifications in part in the process, if the various changes or modifications of the present invention are not departed from the essence of the present invention God and range, and belong within the scope of the claim and equivalent technologies of the present invention, then the present invention is also intended to comprising these changes And modification.

Claims (4)

1. a kind of novel liquid-transfering device taking liquid for draught cupboard, it is characterised in that：It includes injection mechanism, connection flexible pipe, amount Liquid pipe, magnetic one-way valve and for measuring pipet to be fixed on the holder in draught cupboard, the injection mechanism includes injection tube, work Plug, push-pull rod, pull rod handle, movable push bar, pressing handle, reset helical spring and silica gel plug, the piston are slidably installed in institute The circular cylinder intracavitary of injection tube is stated, the bottom end of the push-pull rod is fixedly connected on the upper surface of the piston, the push-pull rod One end far from piston is equipped with pull rod handle, and the bottom end of the injection tube is equipped with injection interface, is arranged on the injection interface Adapter coupling for being tightly connected with the measuring pipet top end opening, the push-pull rod are internally provided with along push-and-pull pole length side To the hollow cavity of extension, the movable push bar is plugged in the hollow cavity, and the bottom end of the movable push bar is fixedly connected There is silica gel plug, the position that the bottom end opening of the hollow cavity is corresponded on the piston freely leads to equipped with permission silica gel plug The bottom end opening sealing of the through-hole crossed, the silica gel plug and the hollow cavity coordinates, and the top of the movable push bar is fixed It is connected with pressing handle, the madial wall of the hollow cavity is equipped with limit baffle ring, and the reset helical spring is set in activity On push rod, and the reset helical spring is between the pressing handle and the limit baffle ring, right on the movable push bar The lower position of limit baffle ring described in Ying Yu is equipped with screens bulge loop；One end of the connection flexible pipe passes through adapter coupling and the note Shooting cylinder connects, and the other end of the connection flexible pipe and the top port sealing of measuring pipet connect；The bottom end imbibition of the measuring pipet Tapered suction inlet is designed in port, and the magnetic one-way valve is arranged in the taper suction inlet, and the magnetic one-way valve includes unidirectional Fluid channel and magnetic floating valve, the magnetic floating valve is arranged in the one-way fluid channel, on the lateral wall of the measuring pipet It is equipped with magnet ring corresponding to the position in the one-way fluid channel, the magnetic floating valve is using hollow ball made of magnetic material Body, the magnet ring are matched with the magnetic floating valve, to which one-way fluid channel is blocked and be realized using magnetic floating valve The function of check valve.

2. the novel liquid-transfering device according to claim 1 for taking liquid for draught cupboard, it is characterised in that：The magnetic floating valve Outer surface be coated with rubber membrane.

3. the novel liquid-transfering device according to claim 1 for taking liquid for draught cupboard, it is characterised in that：The magnetic floating valve Outer surface be coated with pellosil.

4. the novel liquid-transfering device according to claim 2 or 3 for taking liquid for draught cupboard, it is characterised in that：It is described unidirectional Fluid channel is made of interconnected tapered channel, Vertical Channel and limit channels three parts, and the magnetic floating valve setting exists In the tapered channel, the internal diameter of the tapered channel is gradually reduced by the direction of measuring pipet top to measuring pipet bottom end, described The diameter of magnetic floating valve is more than the diameter at tapered channel lowest calibre.