CN109738268A - A kind of rack for test tube can automatic lifting nitrogen evaporator - Google Patents
A kind of rack for test tube can automatic lifting nitrogen evaporator Download PDFInfo
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- CN109738268A CN109738268A CN201811649664.5A CN201811649664A CN109738268A CN 109738268 A CN109738268 A CN 109738268A CN 201811649664 A CN201811649664 A CN 201811649664A CN 109738268 A CN109738268 A CN 109738268A
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- rack
- test tube
- nitrogen evaporator
- bath
- screw rod
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Abstract
A kind of rack for test tube can automatic lifting nitrogen evaporator, belong to field of analytic instrument.Bath including nitrogen evaporator shell and in shell is arranged by stepper motor driving, by screw rod-transmission nut kinematic pair lifting structure of synchronous belt transmission power around bath；The periphery of transmission nut in screw rod-transmission nut kinematic pair, suit are provided with drive socket；Rack for test tube is separably placed in the upper end of the drive socket.The lifting of drive socket is controlled by controlling the rotation direction of stepper motor, and then drives the lifting of rack for test tube；It is separable split type structure between rack for test tube and bath, nitrogen evaporator shell.Using the rack for test tube structure detachable with nitrogen evaporator shell, the lifting of rack for test tube is realized using vertically arranged screw rod-transmission nut kinematic pair, and then solves the problems, such as that concentrating sample liquid level declines and rack for test tube cannot rise and cause thickening efficiency low, it can solve the not contaminated problem of air-blowing needle.Can be widely used for nitrogen evaporator designs and manufactures field.
Description
Technical field
The invention belongs to field of analytic instrument more particularly to it is a kind of for nitrogen evaporator can automatic-lifting type rack for test tube.
Background technique
Nitrogen evaporator is mainly used for the sample preparation in liquid phase, gas phase and mass spectral analysis, and using international endorsement technology, nitrogen is blown
Instrument usually by nitrogen be blown into heating sample surface carry out sample concentration, have the characteristics that it is time saving, easy to operate, be easy to control,
The result that can be concentrated quickly.It is widely used in the industries such as farming residual analysis, commodity inspection, food, environment, pharmacy, biological products.
Nitrogen evaporator improves liquid evaporation speed with temperature using the air flowing around sample.Since nitrogen is a kind of
Inactive gas can play the role of starvation, and the reagent in test tube is prevented to be oxidized.Nitrogen evaporator is fast using nitrogen
The vapor liquid equilibrium in liquid overhead is broken in speed flowing, to make the speed quickening that evaporates；And temperature is increased by heating water bath mode
Degree, to achieve the purpose that concentration.
At present on the market there are mainly two types of the nitrogen evaporator of form, a kind of nitrogen evaporator is dried up using the form of spiral drying
Sample, the nitrogen evaporator advantage are that primary manageable sample size is more, and after having handled, rack for test tube can remove bath
Slot directly changes the rack for test tube that one has placed sample and works on.But since nitrogen to be utilized generates cyclone, so
Nitrogen gas consumption is very big, takes very much gas.Another nitrogen evaporator is exactly common air-blowing, air-blowing needle is moved on to ullage, close to liquid level
Air-blowing can save much compared to the first nitrogen air-blowing quantity, need to be manually operated, very inconvenient.
The instrument for having the advantages of to above-mentioned two instrument integrate upgrading at present increases gas on the basis of multi-pass amount
Blow needle can automatic up and down adjustment function, for example, authorized announcement date is 2015.07.08, Authorization Notice No. is
The utility model of CN204454427U discloses a kind of " the blowing needle lifting device for nitrogen evaporator " comprising: upper plate, under
Plate, the first, second, third and fourth bracket, guide rail, sliding block, adjusting seat, copper transmission nut, screw motor, the first and second X arm, upper plate, under
Plate is respectively mounted there are two corresponding first support and guide rail, and guide rail is interior to be equipped with sliding block；Second and third bracket respectively with upper plate
Sliding block it is affixed, adjusting seat is mounted between second and third bracket, and two the 4th brackets are affixed with the sliding block of lower plate respectively；
Screw motor is fixed on upper plate, and copper transmission nut, copper transmission nut and adjusting seat are threaded on the screw rod of screw motor
It interlocks；Wherein the first support of one end and upper plate is hinged for first X arm, and the 4th bracket of the first X arm other end and lower plate is hinged；
Wherein one end and adjusting seat are hinged for 2nd X arm, and the first support of the 2nd X arm other end and lower plate is hinged.The technical solution is used to
Solve the problems, such as that concentrating sample liquid level declines and blowing needle cannot cause thickening efficiency low with liquid level decline.
Authorized announcement date is 2015.04.08, and Authorization Notice No. is the utility model of CN204255739U, discloses one kind
The nitrogen evaporator of electric up-down control comprising pedestal, support frame, diversion pipe backboard, branch's diversion pipe, blow needle and electric up-down
Mechanism, the electric lifting mechanism include stepper motor, inlet pipe connection and height regulating rod, and support frame as described above is equipped with perpendicular
To groove, height regulating rod be set to the groove in, fix a height adjustment fixed plate at the back side of diversion pipe backboard, it is described
Height adjustment fixed plate is slidably arranged on height regulating rod, and one end of the inlet pipe connection is connected with gas control valve, separately
One end is connected with height adjustment fixed plate.It is realized accurate, stable lifting platform control, is suitable for by electric lifting mechanism
Water-bath and dry type nitrogen evaporator use.
For above-mentioned technical proposal, there are some problems for discovery in actual use.
Since laboratory largely uses the centrifuge tube of 15ml, centrifuge tube height 120mm or so, air-blowing needle is from test tube
Sample liquid level maintain a certain distance, too far air consumption increases, and sample solution is blown in the bad adjusting of too close air pressure and existing
The risk splashed, thus air-blowing needle be also required to it is longer.Centrifuge tube can largely be placed in water, in air-blowing pin module entire lowering
In the process, if do not removed extra air-blowing needle, the water surface will be entered together, contaminated pinhead pollutes sample in concentration next time
Product, such as removing extra air-blowing needle will be troublesome, currently in order to reducing manual operation, same equipotential can be placed on rack for test tube
Several centrifuge tubes, when client needs using instrument, the empty centrifuge tube that sample replacement is placed in advance, this mode of operation is not
It is only time-consuming and laborious, it is not inconsistent closing operation convention, there are air-blowing needles can contaminated risk yet.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of rack for test tube can automatic lifting nitrogen evaporator.Its use with
The detachable rack for test tube structure of nitrogen evaporator shell is come using vertically arranged screw rod-transmission nut kinematic pair lifting structure
It realizes the lifting of rack for test tube, and then solves the decline of concentrating sample liquid level and rack for test tube cannot rise and cause thickening efficiency low
Problem can solve the not contaminated problem of air-blowing needle.
The technical scheme is that provide a kind of rack for test tube can automatic lifting nitrogen evaporator, including nitrogen evaporator shell and
Bath in shell, the bath is for accommodating rack for test tube；It is characterized in that:
Around bath, a set of screw rod-transmission nut that power is transmitted by stepper motor driving, by synchronous belt is set
Kinematic pair lifting structure；
The screw rod-nut kinematic pair lifting structure includes at least one group of vertically arranged screw rod-nut movement
The synchronous belt of a secondary, stepper motor and connection wire rod and stepper motor main drive wheel；
The screw rod-transmission nut kinematic pair is arranged in bath periphery；
The periphery of transmission nut in the screw rod-transmission nut kinematic pair, suit are provided with drive socket；
The rack for test tube is separably placed in the upper end of the drive socket；
By controlling the rotation direction of stepper motor, to control the lifting of the drive socket, and then the test tube is driven
The lifting of frame；
It is separable split type structure between the rack for test tube and bath, nitrogen evaporator shell.
Screw rod-transmission nut kinematic pair described in it is arranged in the nitrogen evaporator shell of bath periphery.
Screw rod-transmission nut kinematic pair described in it is vertically vertically arranged.
The upper end of the drive socket is provided with rack for test tube fixing seat, fixation hole is provided on rack for test tube；Described
Fixation hole is correspondingly arranged with rack for test tube fixing seat position.
Guide post and fixing seat are provided on the nitrogen evaporator shell；Guide post is run through in the upper end of the drive socket
The lower end of setting, the lead screw is arranged through fixing seat.
In the lower end of the lead screw, suit is fixed with synchronous pulley, the synchronous pulley, synchronous belt, with stepper motor
The coplanar setting of driving wheel on output shaft.
Between two ipsilateral drive sockets of bath, an axle sleeve attachment base is set, by two transmissions that bath is ipsilateral
Sleeve is fixed as one, to guarantee the synchronism in lifting process.
In the plane where the synchronous pulley, synchronous belt and driving wheel, it is provided with belt pulley guide holder or belt pulley
Fixing seat.
The lower section of bath bottom is arranged in plane where the synchronous pulley, synchronous belt and driving wheel.
The screw rod-transmission nut kinematic pair is four groups, and the four groups of screw rods-transmission nut kinematic pair is " two-by-two
One group " be symmetricly set on the two sides of bath.
Compared with the prior art, the invention has the advantages that
1. the mode gone up and down using rack for test tube, the centrifuge tube without placing empty is being tried compared to for air-blowing needle lifting mode
On pipe support, it ensure that sample liquid level of the air-blowing needle always in centrifuge tube is consistent, can effectively improve air-blowing efficiency,
Reduce gas emissions；
2. using four-point supporting form, stable structure, rack for test tube is also able to maintain even running when running to eminence；
3. using detachable rack for test tube structure, only rack for test tube need to be placed in rack for test tube fixing seat and can be carried out
It falls into bath or is risen from bath, and being placed or taken out convenient for test tube of the rack for test tube under taking-up state, instrument user
Just.
Detailed description of the invention
Fig. 1 is the external structure schematic diagram of nitrogen evaporator of the present invention；
Fig. 2 is that rack for test tube of the present invention separates the structural schematic diagram separated with nitrogen evaporator；
Fig. 3 is the structural schematic diagram of rack for test tube lifting structure of the present invention；
Fig. 4 is the side structure schematic view of rack for test tube lifting structure of the present invention；
Fig. 5 is the schematic diagram of rack for test tube lifting structure bottom structure；
Fig. 6 is the schematic diagram of drive lead screw maximum travel position.
1 is bath in figure, and 2 be heating plate, and 3 be synchronous pulley, and 4 be stepper motor, and 5 be motor fixing seat, and 6 be fixation
Seat, 7 be axle sleeve attachment base, and 8 be transmission nut, and 9 be drive lead screw, and 10 be drive socket, and 11 be guide post, and 12 be test tube branch
Frame fixing seat, 13 be belt pulley fixing seat, and 14 be synchronous belt, and 15 be test tube bracket, and 15-1 is fixation hole.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and examples.
In Fig. 1, technical solution of the present invention, provide a kind of rack for test tube can automatic lifting nitrogen evaporator, including nitrogen evaporator
Shell and the bath 1 in shell, the bath is for accommodating rack for test tube 15；Its inventive point is:
Around bath, a set of screw rod-transmission nut that power is transmitted by stepper motor driving, by synchronous belt is set
Kinematic pair lifting structure；
The screw rod-nut kinematic pair lifting structure includes at least one group of vertically arranged screw rod-nut movement
The synchronous belt of a secondary, stepper motor and connection wire rod and stepper motor main drive wheel；
The screw rod-transmission nut kinematic pair is arranged in bath periphery；
The periphery of transmission nut in the screw rod-transmission nut kinematic pair, suit are provided with drive socket 10；
The rack for test tube is separably placed in the upper end of the drive socket；
By controlling the rotation direction of stepper motor, to control the lifting of the drive socket, and then the test tube is driven
The lifting of frame.
The screw rod-transmission nut kinematic pair is arranged in the nitrogen evaporator shell of bath periphery.
The screw rod-transmission nut kinematic pair is vertically vertically arranged.
It is separable split type structure, this technology side between the rack for test tube and bath, nitrogen evaporator shell in Fig. 2
Rack for test tube in case inside nitrogen evaporator bath adopts a split structure, and can individually take out when needed, to facilitate installation test tube.
The upper end of the drive socket is provided with rack for test tube fixing seat 12, fixation hole 15-1 is provided on rack for test tube；
The fixation hole is correspondingly arranged with rack for test tube fixing seat position.
In Fig. 3 and Fig. 4,1 bottom of bath secures heating plate 2, and there are four fixing seat 6, four biographies for the two sides dress of heating plate 2
Dynamic screw rod 9 is separately fixed in four fixing seats 6, and installation is respectively corresponded on four drive lead screws 9, and there are four transmission nuts
(abbreviation transmission nut) 8 respectively corresponds suit and is provided with drive socket 10 in the periphery of each transmission nut.
Drive socket 10 and transmission nut 8 are tightly locked, and two drive sockets 10 ipsilateral positioned at bath are connected by axle sleeve
Seat 7 is fixed, can guarantee the synchronism in lifting process using this structure.
The installation of four guide posts 11 is primarily to screw rod when reaching highest point (referring to shown in Fig. 6), is protected
Card rack for test tube is steadily gone up and down.
In Fig. 5, stepper motor 4 and belt pulley guide holder 13 are fixed in motor fixing seat 5, and belt pulley guide holder is arranged
Main purpose, be in order to increase driving wheel and belt pulley engagement the number of teeth, improve transmission effect, prevent from skidding.
Synchronous belt 14 is mounted on 5 synchronous pulleys 3.
In Fig. 6, the maximum travel position signal of drive lead screw is given, when rack for test tube is transferred to upper end, needs to be oriented to
Column 11 and axle sleeve attachment base 7 assist to fix, so that rack for test tube is also able to maintain steadily reaching highest point.
Course of work summary of the present invention:
When nitrogen evaporator is started to work, rack for test tube is fixed in rack for test tube fixing seat, by corresponding control switch,
Control the operating of stepper motor.
Stepper motor starts that synchronous pulley 3 is driven to rotate, and by the transmission of belt pulley, makes four drive lead screw drivings pair
The transmission nut answered starts to move upwards, and rack for test tube is driven to rise from bath.
The fixation hole of rack for test tube is separately fixed in rack for test tube fixing seat, compared to the lifting individually supported structure (such as
Technical solution described in patent CN202661322U), lifting structure used by the technical program substantially increases test tube
Stationarity of the frame in uphill process, so that air-blowing needle does not enter in the water in bath always in the nitrogen evaporator course of work,
And it ensure that air-blowing efficiency.
When needing rack for test tube to fall into bath, it need to only change the rotation direction of stepper motor.
Since the forward and reverse rotation control of stepper motor is the prior art, therefore its control principle and specific control circuit exist
This is no longer described.
Technical solution of the present invention, using the rack for test tube structure detachable with nitrogen evaporator shell, using vertically arranged
Screw rod-transmission nut kinematic pair lifting structure, the lifting of Lai Shixian rack for test tube, and then solve the decline of concentrating sample liquid level and try
Pipe support cannot rise the problem for causing thickening efficiency low, can solve the not contaminated problem of air-blowing needle.
Invention can be widely used in nitrogen evaporator designs and manufactures field.
Claims (10)
1. a kind of rack for test tube can automatic lifting nitrogen evaporator, the bath including nitrogen evaporator shell and in shell, the bath
Slot is for accommodating rack for test tube；It is characterized in that:
Around bath, a set of screw rod-nut kinematic pair liter that power is transmitted by stepper motor driving, by synchronous belt is set
Structure drops；
The screw rod-nut kinematic pair lifting structure includes at least one group of vertically arranged screw rod-nut kinematic pair, one
The synchronous belt of stepper motor and connection wire rod and stepper motor main drive wheel；
The screw rod-nut kinematic pair is arranged in bath periphery；
The periphery of transmission nut in the screw rod-nut kinematic pair, suit are provided with drive socket；
The rack for test tube is separably placed in the upper end of the drive socket；
By controlling the rotation direction of stepper motor, to control the lifting of the drive socket, and then the rack for test tube is driven
Lifting；
It is separable split type structure between the rack for test tube and bath, nitrogen evaporator shell.
2. rack for test tube described in accordance with the claim 1 can automatic lifting nitrogen evaporator, it is characterized in that the screw rod-transmission spiral shell
Female kinematic pair is arranged in the nitrogen evaporator shell of bath periphery.
3. rack for test tube described in accordance with the claim 1 can automatic lifting nitrogen evaporator, it is characterized in that the screw rod-transmission spiral shell
Female kinematic pair is vertically vertically arranged.
4. rack for test tube described in accordance with the claim 1 can automatic lifting nitrogen evaporator, it is characterized in that in the upper of the drive socket
End is provided with rack for test tube fixing seat, and fixation hole is provided on rack for test tube；The fixation hole and rack for test tube fixing seat position pair
It should be arranged.
5. rack for test tube described in accordance with the claim 1 can automatic lifting nitrogen evaporator, it is characterized in that on the nitrogen evaporator shell
It is provided with guide post and fixing seat；The upper end of the drive socket is arranged through guide post, and the lower end of the lead screw is through fixation
Seat setting.
6. rack for test tube described in accordance with the claim 1 can automatic lifting nitrogen evaporator, it is characterized in that in the lower end cap of the lead screw
Dress is fixed with synchronous pulley, the coplanar setting of driving wheel on the synchronous pulley, synchronous belt, with stepper motor output shaft.
7. rack for test tube described in accordance with the claim 1 can automatic lifting nitrogen evaporator, it is characterized in that in ipsilateral two biographies of bath
Between moving sleeve, an axle sleeve attachment base is set, two ipsilateral drive sockets of bath are fixed as one, to guarantee to go up and down
Synchronism in journey.
8. rack for test tube described in accordance with the claim 1 can automatic lifting nitrogen evaporator, it is characterized in that in the synchronous pulley, synchronization
In plane where band and driving wheel, it is provided with belt pulley guide holder or belt pulley fixing seat.
9. according to claim 8 rack for test tube can automatic lifting nitrogen evaporator, it is characterized in that the synchronous pulley, synchronous belt
And the plane where driving wheel, the lower section of bath bottom is set.
10. rack for test tube described in accordance with the claim 1 can automatic lifting nitrogen evaporator, it is characterized in that the screw rod-transmission spiral shell
Female kinematic pair is four groups, is symmetricly set on the two of bath to four groups of screw rods-transmission nut kinematic pair " in pairs "
Side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811649664.5A CN109738268A (en) | 2018-12-30 | 2018-12-30 | A kind of rack for test tube can automatic lifting nitrogen evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811649664.5A CN109738268A (en) | 2018-12-30 | 2018-12-30 | A kind of rack for test tube can automatic lifting nitrogen evaporator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109738268A true CN109738268A (en) | 2019-05-10 |
Family
ID=66362945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811649664.5A Pending CN109738268A (en) | 2018-12-30 | 2018-12-30 | A kind of rack for test tube can automatic lifting nitrogen evaporator |
Country Status (1)
| Country | Link |
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| CN (1) | CN109738268A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112924266A (en) * | 2020-12-25 | 2021-06-08 | 湖北鼎泰高科有限公司 | Column socket of solid-phase extraction nitrogen blowing concentrator and nitrogen blowing assembly |
| CN114214186A (en) * | 2021-12-10 | 2022-03-22 | 武汉承启医学科技有限公司 | Device for rapidly detecting animal pathogens by using constant-temperature amplification technology |
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| CN114214186A (en) * | 2021-12-10 | 2022-03-22 | 武汉承启医学科技有限公司 | Device for rapidly detecting animal pathogens by using constant-temperature amplification technology |
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Application publication date: 20190510 |
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