CN105003411B - Liquid chromatogram parallel high-pressure infusion pump - Google Patents
Liquid chromatogram parallel high-pressure infusion pump Download PDFInfo
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- CN105003411B CN105003411B CN201510419108.9A CN201510419108A CN105003411B CN 105003411 B CN105003411 B CN 105003411B CN 201510419108 A CN201510419108 A CN 201510419108A CN 105003411 B CN105003411 B CN 105003411B
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Abstract
The invention provides a liquid chromatogram parallel high-pressure infusion pump, and relates to the field of chromatogram detection. The liquid chromatogram parallel high-pressure infusion pump comprises two same pump heads, and two reciprocating liquid conveying mechanisms which are the same in structure and are connected with the two pump heads respectively. The liquid chromatogram parallel high-pressure infusion pump further comprises a fixing assembly, a driven assembly and three drive devices, wherein one drive device is fixedly connected with the fixing assembly and used for driving the driven assembly to reciprocate. The driven assembly comprises a connecting piece, two flat-plate-shaped moving cams and two adjusting blocks which are the same in shape. The two moving cams are symmetrically arranged and rotationally connected with the connecting piece. The plate faces, on the same side, of the two moving cams abut against wheels of the two reciprocating liquid conveying mechanisms, and the plate faces, on the other sides, of the two moving cams abut against the two adjusting blocks. The two adjusting blocks are symmetrically arranged. The other two drive devices are used for driving the two adjusting blocks to reciprocate. The liquid chromatogram parallel high-pressure infusion pump solves the technical problems of insufficient machining precision, the liquid supplying amount, the liquid supplying proportion, the liquid supplying pressure and the pressure pulsation in the prior art.
Description
Technical field
The present invention relates to chromatogram detection field, more particularly, to a kind of liquid chromatogram parallel high voltage infusion pump.
Background technology
Existing liquid chromatogram high-pressure parallel lobe pump, as shown in figure 4, including：Motor (not shown), pump main body 25
Two on all four pump heads 1 being fixedly connected with pump main body 25 and the camshaft 26 of motor connection, it is fixedly connected on camshaft
The consistent cylindrical cam 27 in parallel of 180 degree each other of two shapes on 26, the reciprocal conveying mechanism 2 of two nested structure identicals,
Two cams 27 are connected respectively by a set of reciprocal conveying mechanism 2 with two pump heads 1；Reciprocal conveying mechanism 2 is pushed away including plunger
Bar 28, plunger back seat 29 and the plunger 30 being fixedly connected with plunger back seat 29, one end of plunger stem 28 is provided with roller 31；Two
Pump head 1 is respectively with pump chamber and the inlet opening connected with pump chamber and outage；Feed liquor is provided with the inlet opening and fluid hole of pump head 1
Check valve and go out liquid individual event valve (not shown), the feed liquor individual event valve of pump head 1 is connected by pipeline with the solvent bottle of mobile phase
Connect；Discharge opeing check valve is connected by high-pressure transfusion tube with detecting system (not shown), is provided with close between pump head 1 and plunger 30
Compression spring 32 is arranged with outside seal, plunger back seat 29, the two ends of compression spring 32 head on respectively pump main body 25 and plunger back seat 29
The shaft shoulder；The excircle of cam 27 is provided with one group of cam curve, and this group of cam curve includes ascending curve and decline curve, on
Rise curve and decline curve is spiral of Archimedes, the top of the ascending curve of a cylindrical cam 27 corresponds to another
The end of the ascending curve of cylindrical cam 27, the ascending curve angle of cylindrical cam is 180 degree.During feed flow, cylindrical cam
Ascending curve be engaged with corresponding roller, the feed liquor closed check valve on pump head, feed flow check valve open, cylindrical cam
Rotary motion be transformed into the linear uniform motion of plunger, pump head is by feed flow check valve and high-pressure transfusion tube feed flow to system；
After one pump head feed flow terminates, the same action of another pump head is to system feed flow；Cam axle one week, two groups of pump heads are handed over
For feed flow and imbibition, the alternating of mobile phase is continuously supplied needed for complete paired systems.
Here there is following problem inevitable：First, the liquid chromatogram high-pressure parallel lobe pump in a low voltage state, cylinder
The rotary motion of cam is transformed into linear uniform motion when corresponding plunger is infused to promote two plunger alternations, then can
Obtain smooth output liquid stream.And under conditions of high pressure and super-pressure, temperature-resistant, pressure can be with by compressed liquid volume
Reduce and increase.In the presence of high pressure, super-pressure, liquid is compressed by, with plunger propulsion at the uniform velocity, can in pump chamber
The liquid volume compressed is less and less, and it is increasing that pressure can become therewith.During two pump heads replace feed flow, must
The regular pressure fluctuation as sine wave can be so produced, the liquid supply rate accuracy and repeatability that result in pump is all poor.For
Reduction pulse, prior art is the lifting rate by reducing each stroke, that is, reduce the stroke of plunger, at the same improve motor and
The rotating speed of camshaft, realizes so as to improve the frequency and movement velocity of the back and forth movement of plunger.But the motion of plunger frequency
The raising of rate and movement velocity can accelerate the abrasion of the associated components such as sealing ring, affect the life-span of pump.
Secondly：Current liquid chromatogram high-pressure parallel lobe pump, the scope for using all is restricted to a great extent.
Such as：Cam design is finished, and after assembling shaping, the maximum lift of cam is certain, the feed flow of camshaft each rotation be exactly it is certain,
Cannot be adjusted again；The curve of cam is certain, and the indices of lobe pump are also determined that, including pulsation, repeatability, accurately
Property, liquid supply pressure etc..Want to change, curve can only be redesigned；The curve of cam is certain, has difference in the face of Protean
The mobile phase of the compressed coefficient, lobe pump can seem such helpless under conditions of high pressure or super-pressure；At present pump is each
The design of component, is nearly all man-to-man, it is impossible to change the function of pump by simply changing certain component.
Have again：Two cams of design of current liquid chromatogram parallel high voltage infusion pump are duplicate 180 degrees each other,
This causes high pressure pump typically only to convey a kind of liquid, even if two kinds of liquid can be conveyed, the ratio of two kinds of liquid can only be 1:
1, which limits the use range of pump.
Also：The design of current liquid chromatogram parallel high voltage infusion pump, generally existing the fatal problem of manufacturability difference.
In other words, the design of some high pressure pumps at present, in order to meet the technological requirement of following process and assembling, it has to reduce
Design requirement.So that high pressure pump, use requirement is not just reached from design；Meet in the design of high pressure pump and use
Require but because manufacturability is poor, processing and assembling can not meet design requirement again.Should say, current liquid chromatogram parallel high voltage
Infusion pump, is China's liquid chromatogram high pressure pump to advanced international standard from the problem for being designed into processing, assembly process process difference
The yoke drawn close.
Based on this, the invention provides a kind of liquid chromatogram parallel high voltage infusion pump is solving above-mentioned technical problem.
The content of the invention
It is an object of the invention to provide a kind of liquid chromatogram parallel high voltage infusion pump, to solve prior art in liquid phase color
Spectrum high-voltage parallel lobe pump processing technology is poor, machining accuracy inadequate, the liquid supply rate accuracy of pump, poor repeatability, liquid supply rate,
For the technical problem that liquid proportional, liquid supply pressure and pressure fluctuation can not be adjusted.
A kind of liquid chromatogram parallel high voltage infusion pump is provided in an embodiment of the present invention, and the liquid chromatogram is in parallel high
Pressure infuser pump includes two identical pump heads, and the reciprocal conveying mechanism of two structure identicals being connected respectively with two pump heads,
The pump also includes fixation kit, driven subassembly and three driving means；Two reciprocal conveying mechanisms respectively with the fixation
Component is fixedly connected；One of them described driving means is fixedly connected with the fixation kit, for driving the driven subassembly
Along the direction reciprocating motion perpendicular to two reciprocal conveying mechanisms；
The driven subassembly includes connector, two flat translating cams of shape identical and two shape identicals
Adjustment block；
Two translating cams are symmetrical arranged, and rotate with the connector be connected respectively, and rotating shaft is described in two
Translating cam one end close to each other；The plate face of two described translating cam the same sides reciprocal conveying mechanism described with two respectively
Roller abut；The plate face of two translating cam opposite sides is abutted respectively with two adjustment blocks；
Two adjustment blocks are symmetrical arranged, and its symmetry axis is conllinear with the symmetry axis of two translating cams；
Two other described driving means is affixed with the connector, for driving two adjustment blocks along parallel to institute
The direction for stating symmetry axis moves back and forth.
Optionally, three driving means are motor.
Optionally, the connector includes flat first connecting portion and second connecting portion；Two translating cams
Rotated with the first connecting portion by rotating shaft and be connected, two rotating shafts are perpendicular to the first connecting portion；Described first connects
Socket part is vertical affixed with one of plate face of the second connecting portion；One of them described motor is solid with the fixation kit
Connect, its drive rod is connected with the second connecting portion using thread screw.
Optionally, the liquid chromatogram parallel high voltage infusion pump also includes drive component, and the drive component is provided with
Lower two parallel slide rails, another plate face of the second connecting portion is provided with the slide block matched with the slide rail；It is described
Slide block is slidably connected with the slide rail.
Optionally, correspondence is provided with two slide blocks per slide rail described in bar.
Optionally, the drive rod of motor described in another two is connected respectively with two adjustment blocks using thread screw.
Optionally, the fixation kit is provided with air vent at three motors.
Optionally, two adjustment blocks and the bearing surface of two translating cams are arc surface.
Optionally, two translating cams are rectangle.
Optionally, the fixation kit includes firm banking, and two reciprocal conveying mechanisms are solid with the firm banking
Connect.
The liquid chromatogram parallel high voltage infusion pump that the present invention is provided, keeps the pump head and reciprocal liquor charging machine of existing equipment
Structure is constant.Two are provided with mutually at an angle and mutually symmetrical with translating cam, by driving means one of them described
Driving, along doing reciprocal linear motion perpendicular to the direction of two reciprocal conveying mechanisms, translational speed is uniform motion.
In the starting stage, two translating cams and two reciprocating structures are in identical angle, and phase is also distinguished in the position of contact
Together, moving back and forth with two translating cams, is transformed into the linear uniform motion of plunger.Due to there is angle, wherein
One translating cam with linear motion, with the contact position of the roller of the reciprocal conveying mechanism constantly forward, from
And forward plunger motion is promoted, order about pump head feed flow.Another described translating cam is past with another described with linear motion
The contact position of the roller of multiple conveying mechanism constantly backward, so as to promote plunger to move backward, orders about another pump head imbibition.
After one pump head feed flow terminates, the same action of another pump head is to system feed flow；Two translating cams are moved back and forth
Once, two groups of pump heads replace feed flow and imbibition, and the alternating of mobile phase is continuously supplied needed for complete paired systems.
The liquid supply rate and liquid supply pressure for adjusting the liquid chromatogram parallel high voltage infusion pump is such as needed, can be by the driving
Device, adjusts the translational speed and stroke of two translating cams, and then plays the purpose for changing liquid supply rate and liquid supply pressure.
When translational speed and stroke one timing of two translating cams, also by driving means two other described, forward or to
Two adjustment blocks are adjusted afterwards, change the angle of two translating cams, so as to change two reciprocal conveying mechanisms
Plunger stroke, further change liquid supply rate and liquid supply pressure.Same principle, with increasing or can reduce two shiftings
The translational speed and stroke and angle of moving cam makes the accuracy and repeatability of the liquid supply rate of pump adjusting the pressure fluctuation of pump
Reach higher level.
Such as need to change liquid conveying ratio, only one of them described adjustment block need to be adjusted, so as to change one of liquid
Liquid supply rate, and then change the conveying ratio of two kinds of liquid.
The application can also make the translating cam move generated plunger by the control to two adjustment blocks
Linear uniform motion is converted into the linear motion of acceleration or even acceleration, deceleration or even deceleration, to meet the need of various complex situations
Ask.
The liquid chromatogram parallel high voltage infusion pump that the present invention is provided, using two of changeable angle and translational speed
The translating cam, instead of two cylindrical cams in 180 degree in prior art, so as to pass through to change two movements
The angle and translational speed of cam, can change the liquid supply rate of whole pump, liquid supply pressure, for indexs such as liquid proportional, pressure fluctuations.
Meanwhile, the flat translating cam, processing is simple, and machining accuracy is higher than cylindrical cam, can make that the application's is described
Liquid chromatogram parallel high voltage infusion pump is better than prior art processing technology, and machining accuracy is high.
Based on this, than original technology, with processing technology is good, machining accuracy is high, the liquid supply rate of pump is accurate for the present invention
Property, repeated height, liquid supply rate, can adjust for liquid proportional, liquid supply pressure and pressure fluctuation, the little grade guardian technique of pressure fluctuation
Advantage.
Description of the drawings
In order to be illustrated more clearly that the specific embodiment of the invention or technical scheme of the prior art, below will be to concrete
The accompanying drawing to be used needed for embodiment or description of the prior art is briefly described, it is clear that, in describing below
Accompanying drawing is some embodiments of the present invention, for those of ordinary skill in the art, before creative work is not paid
Put, can be with according to these other accompanying drawings of accompanying drawings acquisition.
Fig. 1 is the structural representation of liquid chromatogram parallel high voltage infusion pump described in the present embodiment；
Fig. 2 is the structural representation of driven subassembly；
Fig. 3 is the structural representation that motor is connected with drive component；
Fig. 4 is prior art construction schematic diagram；
Fig. 5 is the calculating schematic diagram of specific design citing.
Reference：1- pump heads；The reciprocal conveying mechanisms of 2-；3- fixation kits；4- driven subassemblies；The motors of 5- first；6-
Two motors；The motors of 7- the 3rd；8- connectors；9- translating cams；10- adjustment blocks；11- first connecting portions；12- second connecting portions；
13- rotating shafts；14- drive rods；15- thread screw structures；The upper slide rails of 16-；17- glidepaths；18- slide blocks；The upper slide rails of 19- are fixed
Plate；20- glidepath fixed plates；21- connecting plates；22- air vents；The dust-proof barriers of 23-；24- firm bankings；25- pump main bodys；26-
Camshaft；27- cams；28- plunger stems；29- plunger back seats；30- plungers；31- rollers；32- compression springs.
Specific embodiment
Technical scheme is clearly and completely described below in conjunction with accompanying drawing, it is clear that described enforcement
Example is a part of embodiment of the invention, rather than the embodiment of whole.Based on the embodiment in the present invention, ordinary skill
The every other embodiment that personnel are obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
In describing the invention, it should be noted that term " " center ", " on ", D score, "left", "right", " vertical ",
The orientation or position relationship of the instruction such as " level ", " interior ", " outward " be based on orientation shown in the drawings or position relationship, merely to
Be easy to description the present invention and simplify description, rather than indicate or imply indication device or element must have specific orientation,
With specific azimuth configuration and operation, therefore it is not considered as limiting the invention.Additionally, term " first ", " second ",
" the 3rd " is only used for describing purpose, and it is not intended that indicating or implying relative importance.
In describing the invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " should be interpreted broadly, for example, it may be fixedly connected, or be detachably connected, or the connection of one；Can
Being to be mechanically connected, or be welded connection；Can be joined directly together, it is also possible to be indirectly connected to by intermediary, can be with
It is the connection of two element internals.For the ordinary skill in the art, can understand that above-mentioned term exists with concrete condition
Concrete meaning in the present invention.
Embodiment one
As Figure 1-4, in the present embodiment there is provided a kind of liquid chromatogram parallel high voltage infusion pump, the liquid chromatogram
Parallel high voltage infusion pump includes two identical pump heads 1, and two structure identicals being connected respectively with two pump heads 1 are back and forth sent
Liquid mechanism 2, the pump also includes fixation kit 3, driven subassembly 4 and three driving means.Preferred three driving means are equal
For motor, (for ease of distinguishing description and understanding, three motors are separately labeled, for driving the first motor 5 of driven subassembly, are used for
Drive second motor 6 and the 3rd motor 7 of two adjustment blocks).Two reciprocal conveying mechanisms 2 respectively with the fixation kit
3 are fixedly connected.
The driven subassembly 4 includes the flat translating cam 9 of 8, two shape identicals of connector and two shape phases
Same adjustment block 10.
Two translating cams 9 are symmetrical arranged；The plate face of two the same sides of the translating cam 9 respectively with described in two
The roller 31 of reciprocal conveying mechanism 2 is abutted；The plate face of two opposite sides of the translating cam 9 respectively with two adjustment blocks 10
Abut.
The connector 8 includes flat first connecting portion 11 and second connecting portion 12；Two translating cams 9 lead to
Cross rotating shaft 13 and rotate with the first connecting portion 11 and be connected, rotating shaft 13 is located at two translating cams 9 one end close to each other.
Two rotating shafts 13 are perpendicular to the first connecting portion 11；The first connecting portion 11 is with the second connecting portion 12 wherein
One plate face is vertically affixed；First motor 5 is affixed with the fixation kit 3, its drive rod 14 and the second connecting portion
12 are connected using thread screw structure 15, for driving the driven subassembly 4 along perpendicular to two reciprocal conveying mechanisms 2
Direction moves back and forth.
Two adjustment blocks 10 are symmetrical arranged, and its symmetry axis is conllinear with the symmetry axis of two translating cams 9；
Two other driving means second motor 6 and the 3rd motor 7 are affixed with the second connecting portion 12 respectively, and second is electric
The drive rod of the motor 7 of machine 6 and the 3rd is connected respectively with two adjustment blocks 10 using thread screw, for driving described in two
Adjustment block 10 is moved back and forth along the direction parallel to the symmetry axis.
The liquid chromatogram parallel high voltage infusion pump that the present invention is provided, keeps the pump head 1 and reciprocal liquor charging of existing equipment
Mechanism 2 is constant.It is provided with two mutually at an angle and mutually symmetrical with translating cam 9, the first motor 5 is rotated, Ran Houtong
Thread screw structure 15 is crossed, the second connecting portion 12 is driven along straight reciprocating motion, so as to drive the whole driven subassembly 4
Reciprocal linear motion is done perpendicular to the direction of two reciprocal conveying mechanisms 2 in edge.By the rotating speed for controlling the first motor 5,
Translational speed is controlled for uniform motion.In the starting stage, two translating cams 9 and two reciprocating structures are in identical
Angle, the position of contact is also identical respectively, with moving back and forth for two translating cams 9, is transformed into plunger 30 at the uniform velocity
Linear motion.Due to there is angle, one of them described translating cam 9 with linear motion, with the reciprocal conveying mechanism 2
Constantly forward (direction that compression spring 32 is compressed in i.e. such as Fig. 4 forward herein is backward the contact position of roller 31
The direction of the retraction of compression spring 32), so as to promote plunger 30 to travel forward, order about the feed flow of pump head 1.Another described translating cam
9 with linear motion, so as to promote with the contact position of the roller 31 of reciprocal conveying mechanism 2 another described constantly backward
Plunger 30 is moved backward, orders about another imbibition of pump head 1.After one feed flow of pump head 1 terminates, another pump head 1 is moved with same
Make to system feed flow；Two translating cams 9 are moved back and forth once, and two groups of pump heads 1 replace feed flow and imbibition, complete paired systems
The alternating of required mobile phase is continuously supplied.
The liquid supply rate and liquid supply pressure for adjusting the liquid chromatogram parallel high voltage infusion pump is such as needed, can be by control first
The rotating speed of motor 5 and the stroke of drive screw, adjust the translational speed and stroke of two translating cams 9, and then play and change
Become the purpose of liquid supply rate and liquid supply pressure.Translational speed and the timing of stroke one when two translating cams 9, also by control
The driving stroke of second motor 6 and the 3rd motor 7 to screw rod, adjusts forward or backward two adjustment blocks 10, changes two
The angle of the translating cam 9, so as to change the stroke of the plunger 30 of two reciprocal conveying mechanisms 2, further changes
Liquid supply rate and liquid supply pressure.Same principle, can with increase or reduce two translating cams 9 translational speed and stroke with
And angle, adjusting the pressure fluctuation of pump, the accuracy and repeatability for making the liquid supply rate of pump reaches higher level.
Such as need to change liquid conveying ratio, need to only adjust one of them described adjustment block 10, change the corresponding movement
The angle of cam 9, so as to change the liquid supply rate of one of liquid, and then changes the conveying ratio of two kinds of liquid.
The application can also pass through the rotating speed of the second motor 6 of adjustment and the 3rd motor 7, two adjustment blocks 10 of change
Translational speed, makes the translating cam 9 move the generated linear uniform motion of plunger 30 and is converted into accelerating or even acceleration, deceleration
Or the linear motion of even deceleration, to meet the demand of various complex situations.
When the first motor 5 is turned to, the motion of driven subassembly 4 has one by being decelerated to stopping, again by stopping to acceleration
Process.Pressure drop now and the loss of flow, the angle that adjustment translating cam 9 is passed through by the second motor 6 and the 3rd motor 7
To compensate, make up the first motor 5 and occur stopping the phenomenons such as caused pressure drop wink when turning to.
If there is because of the plunger forward compression of reciprocal conveying mechanism, the liquid volume in pump chamber progressively reduces and causes pressure
Power is gradually increasing, and during situation (being likely to occur in high pressure or super-pressure) of increasing of pulsing, can reduce movement by micro
The angle of cam 9 is changed into the mode of uniformly retarded motion to solve the linear uniform motion that makes plunger.Meanwhile, appropriate increasing from
The stroke of dynamic component 4, to the accuracy for ensureing pumpage while pressure fluctuation is reduced.
The liquid chromatogram parallel high voltage infusion pump that the present invention is provided, using two of changeable angle and translational speed
The translating cam 9, instead of two cams 27 in 180 degree in prior art, convex so as to pass through two movements of change
The angle and translational speed of wheel 9, can change the liquid supply rate of whole pump, liquid supply pressure, for indexs such as liquid proportional, pressure fluctuations.
Meanwhile, the flat translating cam 9, processing is simple, and machining accuracy is higher than cylindrical cam, can make that the application's is described
Liquid chromatogram parallel high voltage infusion pump is better than prior art processing technology, and machining accuracy is high.
The liquid chromatogram parallel high voltage infusion pump of the application, can be accurately controlled three electricity by computer program
The rotating speed of machine and the driving stroke to screw rod, accurately change liquid supply rate, liquid supply pressure, refer to for liquid proportional, pressure fluctuation etc.
Mark..
Such as Fig. 3, in the alternative of the present embodiment, the liquid chromatogram parallel high voltage infusion pump also includes drive component,
The drive component is provided with upper and lower two parallel slide rails, and slide rail 16 and glidepath 17 are designated in figure, and described second connects
Another plate face of socket part 12 is provided with the slide block 18 matched with the slide rail；The slide block 18 is slidably connected with slide rail.It is excellent
Choosing, the drive component includes upper slide rail fixed plate 19, glidepath fixed plate 20, connecting plate 21, the upper slide rail fixed plate
19th, glidepath fixed plate 20 is vertical with connecting plate 21 affixed respectively, and the upper slide rail 16 is affixed with the upper slide rail fixed plate 19,
The glidepath 17 is affixed with the glidepath fixed plate 20, and the glidepath fixed plate 20 is provided with air vent 22, it is described on
Slide rail fixed plate 19 is provided with dust control by ventilation barrier 23, for dust control by ventilation.First motor 5 and the glidepath fixed plate
20 is affixed, and the glidepath fixed plate 20 is affixed with fixation kit 3.The driven subassembly 4 is improved by slide rail and slide block
Precision of rectilinear motion.
Further correspondence is provided with two slide blocks per slide rail described in bar.Two slide blocks are set, and precision of rectilinear motion is higher.
In the alternative of the present embodiment, the fixation kit 3 is provided with air vent 22 at three motors, is easy to electricity
The radiating of machine.
Such as Fig. 1, in the alternative of the present embodiment, the abutting of two adjustment blocks 10 and two translating cams 9
Face is arc surface.Arc surface is set to, the translating cam 9 is always maintained at 90 degree not with the contact angle of the adjustment block 10
Become, be easy to accurate calculating.Illustrate：With the present invention, a liquid chromatogram high-pressure parallel lobe pump is designed.
The use requirement of pump is analytic type high-pressure pump, and it is 1ml/min to commonly use discharge capacity, first designs pump parameter：Such as Fig. 5, s is rolling
Wheel faces the distance of walking directly along translating cam, and m is the lift of plunger, and n is the air line distance of the walking of translating cam 9.
1st, design uses diameter of plunger φ 3.175mm, plunger sectional area 7.917mm2.
2nd, total lift=126.31mm of pump plunger.
3rd, set the first motor and come and go number of times 20/min, then the round discharge capacity of single is 50 μ l.
Then have：50*20=1000 (μ l/min)=1 (ml/min)
4th, the lift of one way pump plunger：50/7.917=6.316 (mm)
There are two reciprocal transfusion mechanisms：Single plunger lift m is 6.316/2=3.158mm
5th, set translating cam 9 and be less than 300 as basic demand (pressure angle) with the angle of plunger center line,
Then have:S length=sin300*3.158mm=6.316mm
I.e.：S length need to be more than 6.316mm, can so meet the basic demand to maximum pressure angle.
6th, it is 20mm now to take translating cam 9 and move along a straight line apart from n.
7th, then have：3.158/20=tan α=0.1579
α=8.9730 are eligible less than 300
8th, roller face directly along translating cam move apart from s：
=20/cos8.972920=20/0.98776=20.2478 (mm)
9th, inference：When the first motor moves back and forth 20mm, translating cam 9 with the center of rotating shaft 13 as 0 point with 20.2478 as half
It is promoted forward footpath, adjustment block 10 8.972920, when rectilinear path is 3.158mm, and the one-stroke liquid supply rate of a pump is 25 μ
l。
Two parallel connection of pumps feed flows are 1000 (μ l/min)
Such as Fig. 1, in the alternative of the present embodiment, two translating cams 9 are rectangle.The rectangular movement
Cam 9 is easy to processing.
Such as Fig. 1, in the alternative of the present embodiment, the fixation kit 3 includes firm banking 24, and two described back and forth to send
Liquid mechanism 2 is affixed with the firm banking 24.The preferred firm banking 24 is rectangle.With reference to Fig. 3 it can be seen that, the present invention
Designed liquid chromatogram parallel high voltage infusion pump, is substantially built into plate, and is mostly slab.The processing of this combination
Manufacturability with assembling is extraordinary.In addition, in all parts of traditional liquid chromatogram parallel high voltage lobe pump, it is convex
Wheel is to be most difficult to one of part for designing and processing.And in the present invention, play simply two pieces of very easy designs of cam effect
With the flat board of processing.This design, can easily realize the design concept of designer.
Finally it should be noted that：Various embodiments above only to illustrate technical scheme, rather than a limitation；To the greatest extent
Pipe has been described in detail with reference to foregoing embodiments to the present invention, it will be understood by those within the art that：Its according to
So the technical scheme described in foregoing embodiments can be modified, either which part or all technical characteristic are entered
Row equivalent；And these modifications or replacement, do not make the essence disengaging various embodiments of the present invention technology of appropriate technical solution
The scope of scheme.
Claims (10)
1. a kind of liquid chromatogram parallel high voltage infusion pump, including two identical pump heads, and two be connected respectively with two pump heads
The reciprocal conveying mechanism of individual structure identical, it is characterised in that the pump also includes that fixation kit, driven subassembly and three drive dress
Put；Two reciprocal conveying mechanisms are fixedly connected respectively with the fixation kit；One of them described driving means with it is described
Fixation kit is fixedly connected, for driving the driven subassembly edge back and forth to transport perpendicular to the direction of two reciprocal conveying mechanisms
It is dynamic；
The driven subassembly includes connector, two flat translating cams of shape identical and two shape identical adjustment
Block；
Two translating cams are symmetrical arranged, and rotate with the connector be connected respectively, and rotating shaft is positioned at two movements
Cam one end close to each other；The rolling of the plate face of two described translating cam the same sides reciprocal conveying mechanism described with two respectively
Wheel is abutted；The plate face of two translating cam opposite sides is abutted respectively with two adjustment blocks；
Two adjustment blocks are symmetrical arranged, and its symmetry axis is conllinear with the symmetry axis of two translating cams；
Two other described driving means is affixed with the connector, for driving two adjustment blocks along parallel to described right
The direction for claiming axle moves back and forth.
2. liquid chromatogram parallel high voltage infusion pump according to claim 1, it is characterised in that three driving means are equal
For motor.
3. liquid chromatogram parallel high voltage infusion pump according to claim 2, it is characterised in that the connector includes flat board
The first connecting portion and second connecting portion of shape；Two translating cams are rotated with the first connecting portion by rotating shaft and are connected,
Two rotating shafts are perpendicular to the first connecting portion；One of plate face of the first connecting portion and the second connecting portion
It is vertical affixed；One of them described motor is affixed with the fixation kit, and its drive rod adopts screw thread with the second connecting portion
Screw rod connects.
4. liquid chromatogram parallel high voltage infusion pump according to claim 3, it is characterised in that the liquid chromatogram is in parallel high
Pressure infuser pump also includes drive component, and the drive component is provided with upper and lower two parallel slide rails, the second connecting portion
Another plate face is provided with the slide block matched with the slide rail；The slide block is slidably connected with the slide rail.
5. liquid chromatogram parallel high voltage infusion pump according to claim 4, it is characterised in that correspondence sets per slide rail described in bar
It is equipped with two slide blocks.
6. liquid chromatogram parallel high voltage infusion pump according to claim 3, it is characterised in that the drive of motor described in another two
Lever is connected respectively with two adjustment blocks using thread screw.
7. liquid chromatogram parallel high voltage infusion pump according to claim 2, it is characterised in that the fixation kit is near three
Air vent is provided with the individual motor.
8. liquid chromatogram parallel high voltage infusion pump according to claim 1, it is characterised in that two adjustment blocks and two
The bearing surface of the individual translating cam is arc surface.
9. liquid chromatogram parallel high voltage infusion pump according to claim 1, it is characterised in that two translating cams are
Rectangle.
10. the liquid chromatogram parallel high voltage infusion pump according to any one of claim 1-9, it is characterised in that the fixation
Component includes firm banking, and two reciprocal conveying mechanisms are affixed with the firm banking.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510419108.9A CN105003411B (en) | 2015-07-16 | 2015-07-16 | Liquid chromatogram parallel high-pressure infusion pump |
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| CN201510419108.9A CN105003411B (en) | 2015-07-16 | 2015-07-16 | Liquid chromatogram parallel high-pressure infusion pump |
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| CN112630360B (en) * | 2020-12-14 | 2022-10-25 | 盐城工学院 | Four-phase cam pump for ion chromatograph |
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| NO316653B1 (en) * | 2000-09-15 | 2004-03-22 | Nat Oilwell Norway As | Device by piston machine and method of use in controlling the pistons |
| CN202176474U (en) * | 2011-07-22 | 2012-03-28 | 苏州海力电器有限公司 | Power device for water pump |
| CN203272042U (en) * | 2013-05-08 | 2013-11-06 | 深圳市铂纳特斯自动化科技有限公司 | Double-end liquid charge pump |
| CN205064208U (en) * | 2015-07-16 | 2016-03-02 | 河北欧世盛科技有限公司 | Liquid chromatogram high -pressure transfusion pump that connects in parallel |
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