CN206515304U - A kind of automatic sampler - Google Patents
A kind of automatic sampler Download PDFInfo
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- CN206515304U CN206515304U CN201621414378.7U CN201621414378U CN206515304U CN 206515304 U CN206515304 U CN 206515304U CN 201621414378 U CN201621414378 U CN 201621414378U CN 206515304 U CN206515304 U CN 206515304U
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- axis
- sample bottle
- guide rail
- optocoupler
- driving wheel
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Abstract
The utility model belongs to auto injection equipment technical field, is related to a kind of automatic sampler.How it realizes accurate sampling if being solved.Automatic sampler includes sampling mechanism, and the sampling mechanism includes：X-axis moving parts, Y-axis moving parts and Z axis moving parts.The utility model controls the horizontal movement of sample introduction needle by stepper motor precision, there is signal feedback to sample bottle position, control accuracy is less than 0.01mm, step-out, skidding in linear motion etc. can effectively be solved and cause the unsceptered phenomenon of sample introduction needle, without encoder, being accurately positioned for sample introduction needle is just realized.
Description
Technical field
The utility model belongs to auto injection equipment technical field, is related to a kind of automatic sampler.
Background technology
Automatic sampler is as the important component of liquid chromatograph, and a Core Feature is to suck sample from specified sample bottle
Product, are then injected into chromatographic system, complete auto injection.
In the prior art, the sampling mechanism of automatic sampler is as Figure 1-3：
Generally comprise a set of three-dimensional motion system：X-axis moving parts, Y-axis moving parts, Z axis moving parts, the X-axis
Moving parts include guide rail X 1, timing belt X 2, base plate 3, driving wheel X 4, the stepper motor X 5, light that horizontal direction is installed
Coupling X 6 and optocoupler catch X 7；Guide rail Y 8 of the Y-axis moving parts including vertical direction installation, timing belt Y 9, bottom plate 10, active
Take turns Y 11, stepper motor Y 12, optocoupler Y 13 and optocoupler catch Y 14；Z axis moving parts include guide rail Z 15, screw mandrel 16, same
Step band Z 17, stepper motor Z 18, sample introduction needle 19 etc..
Typical sampling process：X-axis is moved：The opposite directions of stepper motor X 5 are moved, and the light in optocoupler X 6 is by optocoupler catch X
7 block, and are designated as zero point, and the motion of the positive directions of stepper motor X 5, by driving wheel X 4, drives timing belt X 2 and X-axis component fortune
Dynamic, it is assumed that No. 4 bottles are walked from mechanical zero 50mm, stepper motor 0.04mm/, then stepper motor X 5 runs 1250 steps from origin, arrives
Up to above No. 4 bottles, bottle cap 20 is punctured, sampling is completed into sample bottle 21.Sample bottle cap 20 is usually hard plastic structure, its
A diameter of 1mm hole is left at center, and inside is equipped with sample bottle holder 22, sealed, while being also the turnover sample of sample introduction needle 19
The passage of bottle 21.
Although said structure can realize automatic sampling, sample introduction needle 19 is in X-direction horizontal movement, due to guide rail
Between pedestal in prolonged motion process, there is wear phenomenon, cause moment of friction to increase, be easily caused stepper motor X
5 step-out phenomenons, it is inaccurate to be also easily caused positioning, sample introduction needle 19 is difficult to level run to specified location, such as sample bottle 21 just
Top, further, since stepper motor X 5 is without feedback signal, system can not accurately monitor the physical location of sample introduction needle 19, meeting
Cause sample introduction needle 19 to be inserted on bottle cap 20, cause hardware damage.
For this problem, encoder is often installed additional in stepper motor rear end, the running status of stepper motor is monitored, with this
The physical location of monitoring sample introduction needle is reached, but if after long-play, synchronous belt sag or timing belt and master such as occurs
When driving wheel skids, such failure still occurs.Therefore, this solution increases the cost of product, and can only be to a certain degree
On solve the above problems, can not thoroughly solve.
The content of the invention
The utility model be for existing technology exist above mentioned problem there is provided a kind of sampler of automatic sampler
Structure, technical problem to be solved in the utility model is：How accurate sampling is realized.
The purpose of this utility model can be realized by following technical proposal：
A kind of automatic sampler, includes sampling mechanism, and the sampling mechanism includes：X-axis moving parts, Y-axis moving parts
And Z axis moving parts；
The X-axis moving parts include the X-axis guide rail being arranged on pedestal, and substrate holder is provided with X-axis guide rail,
X-axis optocoupler is provided with substrate holder, X-axis sample bottle spacer is provided with pedestal, if being provided with X-axis sample bottle spacer
Dry detent, the X-axis optocoupler is driven by X-axis drive mechanism with substrate holder and moved back and forth along X-axis guide rail, and substrate holder is logical
X-axis optocoupler state is crossed to determine mechanical origin and be moved to above corresponding sample bottle；
The Y-axis moving parts include the Y-axis guide rail being arranged on substrate, and sample bottle peace is provided with Y-axis guide rail
Plate is filled, the Y-axis sample bottle spacer parallel with Y-axis guide rail, Y-axis sample bottle spacer are provided with the side of sample bottle installing plate
On be provided with several detents, Y-axis optocoupler is provided with substrate, the Y-axis sample bottle spacer is installed with sample bottle
Plate is moved back and forth by Y-axis drive mechanism drives edge Y-axis guide rail, and sample bottle installing plate determines that machinery is former by Y-axis optocoupler state
Put and sample bottle is moved to corresponding position；
The Z axis moving parts include Z axis guide rail, and Z axis guide rail is arranged in substrate holder, is provided with Z axis guide rail
Sample introduction needle assemblies, sample introduction needle assemblies are pierced into sample bottle by the movement of Z axis drive mechanism drives edge Z axis guide rail.
In a kind of above-mentioned automatic sampler, the X-axis drive mechanism includes X-axis driving wheel, X-axis driven pulley and company
The timing belt of X-axis driving wheel and X-axis driven pulley is connect, X-axis driving wheel is by X-axis motor-driven rotation；The substrate holder is fixed on this
Moved on timing belt and with the timing belt.
In a kind of above-mentioned automatic sampler, the Y-axis drive mechanism includes Y-axis driving wheel, Y-axis driven pulley and company
The timing belt of Y-axis driving wheel and Y-axis driven pulley is connect, Y-axis driving wheel is driven by y-axis motor and rotated；The sample bottle installing plate connects
It is connected on the timing belt and is moved with the timing belt.
In a kind of above-mentioned automatic sampler, the Z axis drive mechanism includes Z axis driving wheel, Z axis driven pulley and company
The timing belt of Z axis driving wheel and Z axis driven pulley is connect, Z axis driving wheel is arranged on by Z axis motor-driven rotation, the Z axis driven pulley
On screw mandrel, sample introduction needle assemblies are arranged on screw mandrel and moved back and forth along Z axis guide rail.
In a kind of above-mentioned automatic sampler, groove, the X-axis sample are provided with the X-axis optocoupler, Y-axis optocoupler
Product bottle spacer is located at the groove center of X-axis optocoupler, and Y-axis sample bottle spacer is located at the groove center of Y-axis optocoupler.
Compared with prior art, the utility model has advantages below：
1st, the utility model controls the horizontal movement of sample introduction needle by stepper motor precision, has signal to sample bottle position
Feedback, control accuracy is less than 0.01mm, can effectively solve step-out, skidding in linear motion etc. and cause sample introduction needle unsceptered existing
As without encoder, just realizing being accurately positioned for sample introduction needle.
2nd, the special construction of sample bottle spacer of the present utility model, can once complete sample bottle positioning and origin is determined
Position, is that can be achieved without two sets of location equipments, cost is low, simple in construction, reliable.
Brief description of the drawings
Fig. 1 is the structural representation of background technology.
Fig. 2 is the structural representation of the sample bottle of background technology.
Fig. 3 is the structural representation of the bottle cap of the sample bottle of background technology.
Fig. 4 is structural representation of the present utility model.
Fig. 5 is Fig. 4 A portions enlarged diagram.
In figure, 1, guide rail X；2nd, timing belt X；3rd, base plate；4th, driving wheel X；5th, stepper motor X；6th, optocoupler X；7th, optocoupler
Catch X；8th, guide rail Y；9th, timing belt Y；10th, bottom plate；11st, driving wheel Y；12nd, stepper motor Y；13rd, optocoupler Y；14th, optocoupler catch
Y；15th, guide rail Z；16th, screw mandrel；17th, timing belt Z；18th, stepper motor Z；19th, sample introduction needle；20th, bottle cap；21st, sample bottle；22nd, sample
Product bottle holder；23rd, pedestal；24th, X-axis guide rail；25th, substrate holder；26th, X-axis optocoupler；27th, X-axis sample bottle spacer；28th, position recessed
Groove；29th, mechanical origin；30th, sample bottle；31st, substrate；32nd, Y-axis guide rail；33rd, sample bottle installing plate；34th, Y-axis sample bottle is positioned
Piece 34；35th, Y-axis optocoupler；36th, Z axis guide rail；37th, sample introduction needle assemblies；38th, X-axis driving wheel；39th, X-axis driven pulley；40th, X-axis is connected
The timing belt of driving wheel and X-axis driven pulley；41st, X-axis motor；42nd, the timing belt of connection Y-axis driving wheel and Y-axis driven pulley；43、Z
Axle driving wheel；44th, Z axis driven pulley；45th, Z axis motor；46th, screw mandrel；47th, y-axis motor.
Embodiment
The following is specific embodiment of the utility model and with reference to accompanying drawing, further is made to the technical solution of the utility model
Description, but the utility model is not limited to these embodiments.
As shown in Figure 4,5.A kind of automatic sampler, includes sampling mechanism, and the sampling mechanism includes：X-axis moving parts,
Y-axis moving parts and Z axis moving parts；
The X-axis moving parts include the X-axis guide rail 24 being arranged on pedestal 23, and base is provided with X-axis guide rail 24
Panel seat 25, is provided with X-axis optocoupler 26 in substrate holder 25, and X-axis sample bottle spacer 27, wherein X-axis are provided with pedestal 23
Sample bottle spacer 27 is to be provided with several detents 28, the X-axis light on optocoupler catch, X-axis sample bottle spacer 27
Coupling 26 is driven by X-axis drive mechanism with substrate holder 25 and moved back and forth along X-axis guide rail 24, and substrate holder 25 passes through the shape of X-axis optocoupler 26
State determines mechanical origin 29 and is moved to the corresponding top of sample bottle 30；
The Y-axis moving parts include the Y-axis guide rail 32 set on the substrate 31, and sample is provided with Y-axis guide rail 32
Product bottle installing plate 33, the Y-axis sample bottle spacer 34 parallel with Y-axis guide rail 32 is provided with the side of sample bottle installing plate 33,
Wherein, Y-axis sample bottle spacer 34 is to be provided with several detents 28 on optocoupler catch, Y-axis sample bottle spacer 34,
Y-axis optocoupler 35 is provided with substrate 31, the Y-axis sample bottle spacer 34 is driven with sample bottle installing plate 33 by Y-axis drive mechanism
It is dynamic to be moved back and forth along Y-axis guide rail 32, and sample bottle installing plate 33 determines mechanical origin and by sample bottle by the state of Y-axis optocoupler 35
30 are moved to corresponding position；
The Z axis moving parts include Z axis guide rail 36, and Z axis guide rail 36 is arranged in substrate holder 25, in Z axis guide rail 36
On be provided with sample introduction needle assemblies 37, sample introduction needle assemblies 37 move piercing sample bottle 30 by Z axis drive mechanism drives edge Z axis guide rail 36
It is sampled.
Specifically, the X-axis drive mechanism includes X-axis driving wheel 38, X-axis driven pulley 39 and connection X-axis driving wheel 38
With the timing belt 40 of X-axis driven pulley 39, X-axis driving wheel 38 drives rotation by X-axis motor 41；It is same that the substrate holder 25 is fixed on this
Move on step band 40 and with the timing belt 40.
Certainly, X-axis drive mechanism can also be substituted by cylinder, oil cylinder, screw mandrel etc..In view of installing space, cost
Etc. relation, the pulley driving mechanism of the present embodiment is preferably.
Specifically, the Y-axis drive mechanism include Y-axis driving wheel, Y-axis driven pulley and connection Y-axis driving wheel and Y-axis from
The timing belt 42 of driving wheel, Y-axis driving wheel drives rotation by y-axis motor 47；The sample bottle installing plate 33 is connected to the timing belt
Moved on 42 and with the timing belt 42.
Equally, Y-axis drive mechanism can also be substituted by cylinder, oil cylinder, screw mandrel etc..In view of installing space, cost
Etc. relation, the pulley driving mechanism of the present embodiment is preferably.
Specifically, the Z axis drive mechanism includes Z axis driving wheel 43, Z axis driven pulley 44 and connection Z axis driving wheel 43
With the timing belt of Z axis driven pulley 44, Z axis driving wheel 43 drives rotation by Z axis motor 45, and the Z axis driven pulley 44 is arranged on silk
On bar 46, sample introduction needle assemblies 37 are arranged on screw mandrel 46 and moved back and forth along Z axis guide rail 36.
The Z axis drive mechanism of the present embodiment can also be replaced directly by the structure such as motor drive screw or cylinder.Together
Sample also allows for the relations such as installing space, cost, and the drive mechanism of the belt pulley combination screw mandrel of the present embodiment is used as preferred side
Case.
Further, the X-axis optocoupler 26, be provided with groove, the X-axis sample bottle spacer 27 on Y-axis optocoupler 35
Positioned at the groove center of X-axis optocoupler 26, Y-axis sample bottle spacer 34 is located at the groove center of Y-axis optocoupler 35.
X-axis moving parts of the present utility model are horizontal movement, and Y-axis moving parts are corresponding with horizontal movement vertical
Motion, and Z axis moving parts are motion of the sample introduction needle in vertical direction.
One typical sampling flow：X-axis moving parts drive sample introduction needle is moved to the top of designated samples bottle 30, Y-axis
Moving parts drive sample bottle 30 to be moved to specified location, and Z groups moving parts control sample introduction needle assemblies 37 are moved downward, and make sample introduction
Sample bottle 30 is needled into, sampling is completed.
Sample injection method of the present utility model, comprises the following steps：
(1) X-axis is moved：Moved by X-axis drive component driving substrate holder 25 along X-axis guide rail 24 and according to X-axis optocoupler 26
State determines mechanical origin 29, then 25 position judgment and shifting according to the detent 28 on X-axis optocoupler 26 of control base board seat
Move to the position of sample bottle 30；
(2) Y-axis is moved：Moved by Y-axis drive component driving sample bottle installing plate 33 along Y-axis guide rail 32 and according to Y-axis light
The state of coupling 35 determines mechanical origin, then controls the sample bottle 30 on sample bottle installing plate 33 to be moved to corresponding position；
(3) Z axis is moved：Moved down by Z axis drive component driving sample introduction needle assemblies 37 along Z axis guide rail 36 and be pierced into sample
In product bottle 30, sampling is completed.
Further, the determination process of mechanical origin 29 of X-axis of the present utility model is as follows：The substrate holder 25 is according to X-axis
The state of optocoupler 26, if X-axis optocoupler 26 is not blocked, surface is currently in detent 28, X-axis drive mechanism driving substrate holder
25 continue positive mobile, until X-axis optocoupler 26 is blocked；When the status display of X-axis optocoupler 26 is blocked, the driving of X-axis drive mechanism
The counter motion of substrate holder 25, until X-axis optocoupler 26 is not blocked, display is currently at the state of detent 28, and calculates current
The width of detent 28, if width is less than setting value, substrate holder 25 continues, toward counter motion, to be more than setting until finding
The position of detent 28 (i.e. origin groove) of value, the position is mechanical origin 29.
The present embodiment sets the width of detent 28 as 1mm.Then width is less than 1mm, and substrate holder 25 continues to move backward,
Position until finding detent 28 of the width more than 1mm.
Further, the timer n=0 that substrate holder 25 is set according to single-chip microcomputer, X-axis drive mechanism is moved to the forward,
When detecting a position of detent 28, then n=n+1, the quantity for detecting the position of detent 28 is the quantity number
Sample bottle 30 position, i.e., the position of described detent 28 is corresponded with the position of sample bottle 30, in detent 28
The heart is the center of sample bottle 30.It is assumed that to find No. 6 is sample bottle position, then as n=6, current location is No. 6 sample bottles
Position.
In addition, the positive movement of the present embodiment, counter motion depend on the forward and reverse of the motor of X-axis drive mechanism.
And, motor is stepper motor.
Similarly, the determination process of the mechanical origin of Y-axis is as follows：Y-axis sample bottle spacer 34 is with sample bottle installing plate 33
Move together, sample bottle installing plate 33 is according to the state of Y-axis optocoupler 35, if Y-axis optocoupler 35 is not blocked, surface is currently at positioning
In groove 28, Y-axis drive mechanism driving sample bottle installing plate 33 continues positive movement, until Y-axis optocoupler 35 is blocked；Work as Y-axis
When the status display of optocoupler 35 is blocked, the counter motion of Y-axis drive mechanism driving sample bottle installing plate 33, until Y-axis optocoupler 35 not by
Block, display is currently at the state of detent 28, and calculates the width of current detent 28, if width is less than setting
Value, then sample bottle installing plate 33 continue toward counter motion, position (the i.e. origin until finding the detent 28 for being more than setting value
Groove), the position is mechanical origin.
Further, the timer n=0 that sample bottle installing plate 33 is set according to single-chip microcomputer, Y-axis drive mechanism is to the forward
Motion, when detecting a position of detent 28, then n=n+1, the quantity for detecting the position of detent 27 is the quantity
The position to be moved to of sample bottle 30 of number, the center of detent 28 is the center of sample bottle.
The position of sample bottle 30 is finally determined by the movement of X-axis, Y-axis, finally by sample introduction needle assemblies 37 move downward into
Sample pin just can be pierced into sample bottle 30.
Completed because the position of detent 28 of X-axis of the present utility model, Y-axis sample bottle spacer 27,34 is machined
Afterwards, corresponded with the position of sample bottle 30, motor is in motion process, according to the position judgment sample bottle 30 of detent 28
Position, occurs step-out in motion process or loses the fortuitous events such as step, also can accurately find very much sample bottle 30
Put.
Specific embodiment described herein is only to the utility model spirit explanation for example.The utility model institute
Category those skilled in the art can make various modifications or supplement or using similar to described specific embodiment
Mode substitute, but without departing from spirit of the present utility model or surmount scope defined in appended claims.
Claims (5)
1. a kind of automatic sampler, includes sampling mechanism, it is characterised in that：The sampling mechanism includes：X-axis moving parts, Y-axis
Moving parts and Z axis moving parts；
The X-axis moving parts include the X-axis guide rail being arranged on pedestal, and substrate holder is provided with X-axis guide rail, in substrate
X-axis optocoupler is provided with seat, is provided with pedestal on X-axis sample bottle spacer, X-axis sample bottle spacer and is provided with several
Detent, the X-axis optocoupler is driven by X-axis drive mechanism with substrate holder and moved back and forth along X-axis guide rail, and substrate holder passes through X
Axle optocoupler state determines mechanical origin and is moved to above corresponding sample bottle；
The Y-axis moving parts include the Y-axis guide rail being arranged on substrate, and sample bottle installing plate is provided with Y-axis guide rail,
It is provided with the Y-axis sample bottle spacer parallel with Y-axis guide rail, Y-axis sample bottle spacer and sets in the side of sample bottle installing plate
Several detents are equipped with, Y-axis optocoupler are provided with substrate, the Y-axis sample bottle spacer is with sample bottle installing plate by Y
Axle drive mechanism drives edge Y-axis guide rail is moved back and forth, and sample bottle installing plate determines mechanical origin by Y-axis optocoupler state and incited somebody to action
Sample bottle is moved to corresponding position；
The Z axis moving parts include Z axis guide rail, and Z axis guide rail is arranged in substrate holder, and sample introduction is provided with Z axis guide rail
Needle assemblies, sample introduction needle assemblies are pierced into sample bottle by the movement of Z axis drive mechanism drives edge Z axis guide rail.
2. a kind of automatic sampler according to claim 1, it is characterised in that：The X-axis drive mechanism includes X-axis master
The timing belt of driving wheel, X-axis driven pulley and connection X-axis driving wheel and X-axis driven pulley, X-axis driving wheel is by X-axis motor-driven rotation；
The substrate holder is fixed on timing belt and moved with timing belt.
3. a kind of automatic sampler according to claim 1, it is characterised in that：The Y-axis drive mechanism includes Y-axis master
The timing belt of driving wheel, Y-axis driven pulley and connection Y-axis driving wheel and Y-axis driven pulley, Y-axis driving wheel is driven by y-axis motor and rotated；
The sample bottle installing plate is connected on timing belt and moved with timing belt.
4. a kind of automatic sampler according to claim 1, it is characterised in that：The Z axis drive mechanism includes Z axis master
Driving wheel, Z axis driven pulley and connection Z axis driving wheel and Z axis driven pulley timing belt, Z axis driving wheel by Z axis motor-driven rotation,
The Z axis driven pulley is arranged on screw mandrel, and sample introduction needle assemblies are arranged on screw mandrel and moved back and forth along Z axis guide rail.
5. a kind of automatic sampler according to claim 1, it is characterised in that：It is all provided with the X-axis optocoupler, Y-axis optocoupler
Groove is equipped with, the X-axis sample bottle spacer is located at the groove center of X-axis optocoupler, and Y-axis sample bottle spacer is located at Y-axis optocoupler
Groove center.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621414378.7U CN206515304U (en) | 2016-12-21 | 2016-12-21 | A kind of automatic sampler |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201621414378.7U CN206515304U (en) | 2016-12-21 | 2016-12-21 | A kind of automatic sampler |
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| CN206515304U true CN206515304U (en) | 2017-09-22 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106645523A (en) * | 2016-12-21 | 2017-05-10 | 浙江福立分析仪器股份有限公司 | Automatic sampler and sampling method thereof |
| CN107991422A (en) * | 2017-11-22 | 2018-05-04 | 中国石油大学(北京) | Heat splits gas-chromatography solid auto injection heat and splits device |
| CN109030808A (en) * | 2018-10-24 | 2018-12-18 | 嘉兴凯实生物科技有限公司 | A kind of improved automatic chemical illumination immunity analysis instrument |
| CN111879955A (en) * | 2020-07-30 | 2020-11-03 | 中国科学院植物研究所 | Automatic sample injector |
-
2016
- 2016-12-21 CN CN201621414378.7U patent/CN206515304U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106645523A (en) * | 2016-12-21 | 2017-05-10 | 浙江福立分析仪器股份有限公司 | Automatic sampler and sampling method thereof |
| CN106645523B (en) * | 2016-12-21 | 2018-08-28 | 浙江福立分析仪器股份有限公司 | A kind of autosampler and its sampling method |
| CN107991422A (en) * | 2017-11-22 | 2018-05-04 | 中国石油大学(北京) | Heat splits gas-chromatography solid auto injection heat and splits device |
| CN107991422B (en) * | 2017-11-22 | 2020-07-24 | 中国石油大学(北京) | Hot-splitting gas chromatography solid automatic sample feeding hot-splitting device |
| CN109030808A (en) * | 2018-10-24 | 2018-12-18 | 嘉兴凯实生物科技有限公司 | A kind of improved automatic chemical illumination immunity analysis instrument |
| CN111879955A (en) * | 2020-07-30 | 2020-11-03 | 中国科学院植物研究所 | Automatic sample injector |
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