CN102200124A - Liquid distribution valve and liquid chromatographic pump equipped with same - Google Patents
Liquid distribution valve and liquid chromatographic pump equipped with same Download PDFInfo
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- CN102200124A CN102200124A CN201010129801XA CN201010129801A CN102200124A CN 102200124 A CN102200124 A CN 102200124A CN 201010129801X A CN201010129801X A CN 201010129801XA CN 201010129801 A CN201010129801 A CN 201010129801A CN 102200124 A CN102200124 A CN 102200124A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/26—Conditioning of the fluid carrier; Flow patterns
- G01N30/28—Control of physical parameters of the fluid carrier
- G01N30/32—Control of physical parameters of the fluid carrier of pressure or speed
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/053—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the inner ends of the cylinders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/128—Driving means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/12—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis
- F04B1/14—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinder axes coaxial with, or parallel or inclined to, main shaft axis having stationary cylinders
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B9/00—Piston machines or pumps characterised by the driving or driven means to or from their working members
- F04B9/02—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical
- F04B9/04—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms
- F04B9/042—Piston machines or pumps characterised by the driving or driven means to or from their working members the means being mechanical the means being cams, eccentrics or pin-and-slot mechanisms the means being cams
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
- G01N30/02—Column chromatography
- G01N30/26—Conditioning of the fluid carrier; Flow patterns
- G01N30/28—Control of physical parameters of the fluid carrier
- G01N30/32—Control of physical parameters of the fluid carrier of pressure or speed
- G01N2030/326—Control of physical parameters of the fluid carrier of pressure or speed pumps
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- Reciprocating Pumps (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
The invention provides a liquid distribution valve, which comprises a valve body. At least two working units are arranged on the valve body; each working unit comprises a liquid inlet, a liquid outlet and at least two interfaces; the liquid inlet, the liquid outlet and the at least two interfaces are mutually communicated in the valve body; and each liquid inlet and each liquid outlet are internally and respectively provided with a one-way valve. The liquid distribution valve has a simple structure and is convenient to use. The invention provides a liquid chromatographic pump equipped with the liquid distribution valve; liquid inlet one-way valves and liquid outlet one-way valves are arranged in the liquid inlets and the liquid outlets of liquid distribution valve and are not arranged on a pump head of the liquid chromatographic pump, and the functions of the liquid inlet one-way valves and the liquid outlet one-way valves are integratedly and uniformly completed by the liquid distribution valve. Therefore, the liquid chromatographic pump is reasonable in structural space layout of all parts, and has orderly pipeline arrangement and small overall size. Moreover, the liquid supply quantity of the liquid chromatographic pump can be improved by several times on the premise of unchanged plunger diameter and lift of a reciprocating liquid supply mechanism.
Description
Technical field
The liquid chromatography pump that the present invention relates to a kind of liquid path distribution valve and this liquid path distribution valve is installed.
Background technique
Liquid chromatography pump is one of important composition parts of liquid chromatograph, stability, repeatability and the analysis precision of the direct impact analysis of its performance.The liquid chromatography pump that is used for liquid chromatograph at present mainly contains 180 ° of single cam liquid chromatography pumps in parallel, 120 ° of single cam liquid chromatography pumps in parallel and 180 ° of double-cam liquid chromatography pumps.
As shown in Figure 1,180 ° of single cam liquid chromatography pumps in parallel comprise that cam 51, a symmetry that is installed on the camshaft 50 is installed in two reciprocal conveying mechanisms and two pump heads 55 of cam 51 both sides.Wherein back and forth conveying mechanism comprise by the bearing (not shown) be supported on plunger push rod 53 on the housing (not shown) of liquid chromatograph, be fixedly connected on plunger push rod 53 1 ends plunger 59, be fixedly connected on the plug of plunger push rod 53 the other ends and be rotatably installed in supporting roller 52 in the plug.The other end of plunger 59 stretches in the pump chamber 56 of pump head 55, is provided with seal element 54 between plunger push rod 53 and the pump head 55.Pump head 55 is provided with inlet opening 57 and the outage 58 that is communicated with pump chamber 56 respectively, inlet opening 57 and outage 58 are communicated with the liquid supplying device and the feeler mechanism of liquid chromatograph by pipeline respectively, in inlet opening 57 and outage 58 the one-way valve (not shown) are installed separately.On its basic circle excircle, be provided with cam curve on the cam 51, the cam curve contact matching of supporting roller 52 and cam 51.When driving mechanism drives cam 51 rotations, supporting roller 52 rolls along the cam curve of cam 51, thereby the rotational motion of cam 51 is converted into the to-and-fro motion of plunger push rod 53 and plunger 59, make the pressure size alternate in the pump chamber 56 of pump head 55, simultaneously advance, under the effect of two one-way valves in the outage, just realized that plunger 59 just whenever makes a round trip and extracted certain amount of fluid, and discharged certain amount of fluid, finished its liquor charging function from outage 58 from inlet opening 57.
Shown in Figure 2 is 120 ° of single cam liquid chromatography pumps in parallel, its structure is basic identical with 180 ° of single cam liquid chromatogram pump structures in parallel, more than only a reciprocal conveying mechanism and a pump head 55.Have 3 reciprocal conveying mechanisms and 3 pump heads 55 in these 120 ° single cam liquid chromatography pumps in parallel.3 reciprocal conveying mechanisms are radial even distribution around the cylindrical of cam 51, the angle between adjacent two reciprocal conveying mechanisms is 120 °.Back and forth conveying mechanism is identical with reciprocal conveying mechanism among Fig. 1, repeats no more.
To be objective, aforesaid 180 ° of single cams liquid chromatography pump in parallel and 120 ° of single cam liquid chromatography pumps in parallel have their original design, cam quantity is few, thereby design, finishing, the processing of cam curve have all been become easily, and these two kinds of pumps have solved headachy pulsation problem, have realized zero pulsation.But these two kinds of chromatogram pumps but can not get promotion and application in reality, withdrawed from stage prematurely.Its most important reason is: these two kinds of liquid chromatography pumps, because two or three reciprocal conveying mechanisms are arranged in the circumferencial direction of cam 51, so just feasible matching used with it other structures, relatively disperse on space layout as the feed liquor mechanism that is communicated with inlet opening, the drainage mechanism that is communicated with outage and analytical structure, each connecting pipeline etc., the line arrangement confusion, unreasonable, the industrial design difficulty; And the shared volume of carrier fluid part is big, causes the liquid chromatography pump overall volume big, needs very big containing space; In addition, the quantity of difficulty, particularly one-way valve of processing, assembling, adjustment, maintenance that has strengthened other key components and partss except that cam is very many, one-way valve is again an easily damaged parts, has more strengthened the difficulty of assembling, maintenance.Everything makes 180 ° of single cam liquid chromatography pumps in parallel and 120 ° of final become infeasible of single cam liquid chromatography pump in parallel.Here also have only two, three pump heads, imagine: how chaotic if six, eight, ten even more pump heads are arranged will be situation.This situation has seriously restricted big discharge capacity and the development of super large discharge liquid chromatography pump aspect liquid chromatograph.
At the defective of above-mentioned liquid chromatography pump in parallel, a kind of 180 ° of double-cam liquid chromatography pumps have appearred, and also be the liquid chromatography pump that generally uses at present.As shown in Figure 3,180 ° of double-cam liquid chromatography pumps comprise a camshaft 50, are installed in the main cam 511 and the auxiliary cam 512 at these camshaft 50 two ends, and two parallel reciprocal conveying mechanisms and two pump heads 55.Back and forth conveying mechanism respectively with main cam 511 and auxiliary cam 512 cooperatings.Reciprocal conveying mechanism wherein is identical with reciprocal liquor charging machine in 180 ° of single cams shown in Figure 1 liquid chromatography pumps in parallel, repeats no more.180 ° of double-cam liquid chromatography pumps of this kind can be designed to parallel or in-line according to the design needs.In 180 ° of double-cam liquid chromatography pump in parallel, main cam 511 is 180 ° with differing of auxiliary cam 512, when the plunger feed flow in one of them reciprocal conveying mechanism, plunger imbibition in another reciprocal conveying mechanism, the liquid chromatography pump continuous liquid supply has been guaranteed in two reciprocal conveying mechanism alternations like this.In 180 ° of double-cam series connection liquid chromatography pumps, also have certain differing between main cam 511 and the auxiliary cam 512.
In 180 ° of double-cam liquid chromatography pumps of this kind, two pump heads 55 are arranged in the same side of cam, and two reciprocal conveying mechanisms are arranged in parallel, and have improved mechanism design situation of difficult such as aforementioned two kinds of liquid chromatogram pump volumes are big, pipeline to a certain extent.But these 180 ° of double-cam liquid chromatography pumps have two reciprocal conveying mechanisms, and each reciprocal conveying mechanism is equipped with a pump head, promptly has two pump heads.Each pump head 55 is provided with pump chamber 56 and inlet opening 57 that is communicated with pump chamber 56 respectively and outage 58, inlet opening 57 and outage 58 are communicated with the liquid supplying device and the feeler mechanism of liquid chromatograph by pipeline respectively, in inlet opening 57 and outage 58 the one-way valve (not shown) are installed separately.Therefore, in 180 ° of double-cam liquid chromatography pumps of this kind,, finishing difficulty big except major and minor cam design difficulty is big, also exist each connecting pipeline etc. on space layout, to disperse, a series of defectives such as industrial design difficulty, machine volume are big.
Summary of the invention
One object of the present invention is to provide a kind of liquid path distribution valve simple in structure, easy to use, uses this liquid path distribution valve can concentrate layouts spatially such as each connecting pipeline in the liquid chromatography pump, simplifies industrial design, reduces the liquid chromatography pump machine volume;
Another object of the present invention is to provide a kind of liquid chromatography pump that this liquid path distribution valve is installed.
For solving the problems of the technologies described above, the present invention adopts following technological scheme:
Liquid path distribution valve of the present invention, comprise valve body, wherein on described valve body, be provided with at least two working cells, each described working cell comprises a liquid entering hole, a liquid outlet and at least two interfaces, described liquid entering hole, liquid outlet and at least two interfaces interconnect in described valve body, in each described liquid entering hole and each described liquid outlet an one-way valve are installed respectively.
Described valve body is provided with two working cells, and the center line setting of the center line of the liquid entering hole in each described working cell, the center line of liquid outlet and each interface at grade.
Wherein, the center line of the center line of the liquid entering hole in each described working cell and liquid outlet is arranged on same the straight line.
The quantity of described interface is even number, and described even number interface is symmetricly set on the both sides of this straight line.
Liquid chromatography pump of the present invention, comprise at least two pump heads, an inlet opening and an outage that each pump head is provided with a pump chamber and is communicated with this pump chamber respectively, wherein also comprise liquid path distribution valve of the present invention, the quantity of the working cell of described liquid path distribution valve is identical with the quantity of pump head, and each working cell is provided with two interfaces; Two interfaces of one of them working cell of described liquid path distribution valve are communicated with inlet opening and outage on the corresponding pump head by connecting pipeline respectively.
Liquid chromatography pump of the present invention comprises cam, pump head and at least 4 reciprocal conveying mechanisms with camshaft.Wherein also comprise liquid path distribution valve of the present invention, be provided with pump chamber that back and forth conveying mechanism quantity is identical in the wherein said pump head, each is separate, be not communicated with mutually.Described each reciprocal conveying mechanism comprises the plunger push rod, be fixedly connected on this plunger push rod one end and the plunger coaxial with it, be installed in the supporting roller of the described plunger push rod the other end rotationally, the cam curve contact matching work of described supporting roller and described cam.Described cam is an end cam, and its cam curve is arranged on the other end opposite with the end face with camshaft.Described cam curve comprises 2-5 curved unit, each curved unit comprises that an energy that is arranged in order converts the rotational motion of described cam to the ascend curve of described plunger uniform motion in a straight line, a recession curve that makes described plunger returning position and a transition curve, the two end part of described ascend curve are provided with trimming curve respectively, and the joint of two adjacent curves is provided with the rounding off line.The helical pitch of described ascend curve and described recession curve is identical, is r=4v/mn π D
2The transition angle z that falls angle y and every described transition curve correspondence of the lift angle x of every described ascend curve correspondence, every described recession curve correspondence satisfies condition: m (x+y+z)=360 °, wherein v represents described cam rotation one all described series parallel connection liquid chromatogram pump deliveries, D represents the diameter of described plunger, n represents the quantity of plunger, n is the integer more than or equal to 4, and m represents the quantity of curved unit, and m is the integer more than or equal to 2.Described at least 4 reciprocal conveying mechanisms are arranged in the side with cam curve of described cam, and arrange evenly that at circumferencial direction their center line all is parallel to the center line of described camshaft.The other end of 4 plungers of described at least 4 reciprocal conveying mechanisms stretches in 4 pump chambers of described pump head cooperating with it respectively.Described supporting roller is a truncated cone, and the circumference of any two cross sections of this supporting roller equates with the ratio of the girth of the cam curve of opposite position.The quantity of interface is identical with the pump chamber quantity of described pump head on the described liquid path distribution valve.Each interface of the same working cell of liquid path distribution valve respectively by connecting pipeline with described pump head the time each pump chamber of synchronous working be communicated with.
Described ascend curve is the uniform pitch helix; Described recession curve is the uniform pitch helix.
The quantity m=2 of described curved unit; The quantity of described reciprocal conveying mechanism is 4; The lift angle x=90 of described ascend curve °, the angle y that falls of described recession curve correspondence is 30 °-55 °, the transition angle z=x-y of described transition curve correspondence.
The quantity m=3 of described curved unit; The quantity of described reciprocal conveying mechanism is 6; The lift angle x=60 of described ascend curve °, the angle y that falls of described recession curve correspondence is 40 °-50 °, the transition angle z=x-y of described transition curve correspondence.
Plunger push rod end in the described reciprocal conveying mechanism is fixedly connected with a plug, this plug comprises the pin of two positioned opposite, be the groove that is used to hold described supporting roller in the middle of two pins, the two ends of the central shaft of described supporting roller are supported on two described pin inboards respectively rotationally, 1=90 °-α of angle β/2 between the center line of the central shaft of described supporting roller and described plunger push rod, α is the cone angle of described truncated cone supporting roller.
Wherein, two sides that are formed on the middle groove of described two pins are parallel to each other, wherein 2=90 °-α of angle β/2 between a side and the bottom surface.
As shown from the above technical solution, the advantage and the good effect of liquid path distribution valve of the present invention and liquid chromatography pump are: liquid path distribution valve of the present invention, comprise at least two working cells that structure is identical, each working cell comprises liquid entering hole, liquid outlet and at least two interfaces that interconnect, an one-way valve is installed in liquid entering hole, the liquid outlet separately, and structure is very simple; During use, only corresponding interface in interface and the pump head need be coupled together and get final product, very convenient.
Liquid chromatography pump of the present invention is equipped with liquid path distribution valve of the present invention, feed liquor one-way valve and fluid one-way valve are installed in the liquid entering hole and liquid outlet of liquid path distribution valve, and no longer be installed on the pump head of liquid chromatography pump, the function of feed liquor one-way valve and fluid one-way valve is come centralized and unified finishing by the liquid path distribution valve.Therefore, the each several part structure space is rationally distributed in the liquid chromatography pump of the present invention, and line arrangement is in good order, and complete machine takes up room little.In the liquid chromatography pump of the present invention, pump head feed liquor and fluid can shared separately passages, and the design of liquid inlet and outlet no longer includes strict directivity requirement, thereby has simplified design and processing request; Arrange a plurality of pump chambers at circumferencial direction also for simultaneously a pump head, a plurality of reciprocal conveying mechanism series parallel connection design of the super large discharge pump of feed flow simultaneously together provide possibility, four, six, eight, ten even how reciprocal conveying mechanism feed flow simultaneously no longer are dreams.This just makes under all constant prerequisite of the plunger diameter of reciprocal conveying mechanism and lift, can tens of times improve the liquid supply rate of liquid chromatography pumps, therefore, the liquid chromatography pump of liquid path distribution valve of the present invention is installed, not only can satisfy simple series connection of a plurality of reciprocal conveying mechanisms and demand in parallel in the liquid chromatography pump, can also satisfy the demand of the many super large discharge pumps also of many strings.In addition, in the liquid chromatography pump of the present invention, easily damaged parts one-way valve and pipeline are concentrated on the liquid path distribution valve, be easy to reduce liquid chromatography pump failure judgment and maintenance difficulty with they design and installations in the open.
With reference to the accompanying drawing description of a preferred embodiment, above-mentioned and other purpose of the present invention, feature and advantage will be more obvious by following.
Description of drawings
Fig. 1 is existing 180 ° of single cams liquid chromatography pump structural representations in parallel;
Fig. 2 is existing 120 ° of single cams liquid chromatography pump structural representations in parallel;
Fig. 3 is existing 180 ° of double-cam liquid chromatography pump structural representations;
Fig. 4 A is liquid path distribution valve first an embodiment's of the present invention stereogram;
Fig. 4 B is liquid path distribution valve first an embodiment's of the present invention stereogram, has wherein cut a working cell open;
Fig. 5 is liquid path distribution valve second an embodiment's of the present invention stereogram, has wherein cut a working cell open;
Fig. 6 A is two string two and liquid chromatography pump embodiment's stereograms in the liquid chromatography pump of the present invention;
The stereogram of the matching relationship of the cam among string two of two shown in Fig. 6 B presentation graphs 6A and the liquid chromatography pump embodiment, reciprocal conveying mechanism and pump head, wherein not shown plunger cleaning head structure;
The stereogram of the cam among string two of two shown in Fig. 6 C presentation graphs 6A and the liquid chromatography pump embodiment;
The stereogram of the supporting roller among string two of two shown in Fig. 6 D presentation graphs 6A and the liquid chromatography pump embodiment;
The stereogram of the plunger push rod among string two of two shown in Fig. 6 E presentation graphs 6A and the liquid chromatography pump embodiment;
Fig. 7 is the stereogram that is used for the cam among liquid chromatography pump three strings two of the present invention and the liquid chromatography pump embodiment;
Fig. 8 A is four string two and liquid chromatography pump embodiment's stereograms in the liquid chromatography pump of the present invention, for the clear annexation that shows liquid path distribution valve and pump head, connecting pipeline is not shown;
Fig. 8 B is string two of four shown in Fig. 8 A and liquid chromatography pump embodiment's a stereogram, wherein shows connecting pipeline.
Embodiment
Related term definition among the present invention:
" also " in the series parallel connection liquid chromatography pump refers to the reciprocal conveying mechanism of many groups sequential working successively, to guarantee that liquid chromatography pump can be continuously to system's feed flow; " string " wherein refers to a plurality of reciprocal conveying mechanisms while synchronous workings in every group of reciprocal conveying mechanism, and this helps increasing pump delivery.
Liquid path distribution valve embodiment 1
Shown in Fig. 4 A and Fig. 4 B, liquid path distribution valve first embodiment of the present invention comprises valve body 1, is provided with two working cells on valve body 1.Each working cell comprises a liquid entering hole 11, liquid outlet 12 and two interfaces 13.Liquid entering hole 11, liquid outlet 12 and two interfaces 13 interconnect in valve body 1, in each liquid entering hole 11 and each liquid outlet 12 one-way valve 2 are installed respectively.The center line setting of the center line of the center line of liquid entering hole 11, liquid outlet 12 and each interface 13 at grade, and the center line of the center line of liquid entering hole 11 and liquid outlet 12 is arranged on same the straight line, and two interfaces 13 are symmetricly set on the both sides of this straight line.This symplex structure makes it in use stressed evenly, helps feed liquor, fluid reposefully.Certainly, liquid entering hole 11, liquid outlet 12 and the setting type of two interfaces 13 in valve body 1 are not limited to above-mentioned situation, in general, as long as liquid entering hole 11, liquid outlet 12 and two interfaces 13 are interconnected in valve body 1.Also being provided with on the pump head that is used to be connected to liquid chromatography pump on the valve body 1 or being connected to link on the fixing frame, as bolt hole 4 etc.During use, can cooperate with bolt hole 4 with bolt and be installed to the liquid path distribution valve on the liquid chromatography pump pump head or on the fixing frame.This first embodiment's liquid path distribution valve can be used in two strings two and the liquid chromatography pump.
Liquid path distribution valve embodiment 2
As shown in Figure 5, second embodiment of liquid path distribution valve of the present invention, the first example structure difference shown in its structure and Fig. 4 A and Fig. 4 B only is: be provided with four interfaces 13 in each working cell, these four interfaces 13 are arranged symmetrically in the center line both sides of liquid entering hole 11 and liquid outlet 12.All the other same sections repeat no more.This second embodiment's liquid path distribution valve can be used in four strings two and the liquid chromatography pump.
In the liquid path distribution valve of the present invention, the quantity of working cell is not limited to two, it can be according to the group number of the reciprocal conveying mechanism of sequential working (being parallel operation) is relevant successively in the matching used liquid chromatography pump, if two groups of reciprocal conveying mechanisms sequential working successively, promptly so-called " two also " then is provided with two working cells in the liquid path distribution valve, if " three also ", three working cells then are set in the liquid path distribution valve, and the rest may be inferred; In every group of reciprocal conveying mechanism in each working cell in the quantity of interface and the liquid chromatography pump included the time quantity of the reciprocal conveying mechanism of synchronous working (being series operation) relevant, if comprise two reciprocal conveying mechanisms of synchronous working simultaneously in every group of reciprocal conveying mechanism, promptly so-called " two strings ", two interfaces then are set in each working cell, if " three strings ", three interfaces then are set in each working cell, and the rest may be inferred.
Liquid chromatography pump embodiment 1: two string two and liquid chromatography pump
In two strings two and the liquid chromatography pump two groups of reciprocal conveying mechanisms sequential working is successively arranged, comprise two reciprocal conveying mechanisms synchronous working simultaneously in every group of reciprocal conveying mechanism, two pump chambers that match with the reciprocal conveying mechanism of these two while synchronous workings are the while synchronous working also.
Shown in Fig. 6 A and Fig. 6 B, two string two and liquid chromatography pump embodiments of the present invention comprise the pump housing 10, cam 61 and 4 reciprocal conveying mechanisms.Wherein plunger cleaning head 20, pump head 65 and liquid path distribution valve 30 of the present invention are installed successively at the pump housing 10 front ends.Cam 61 is installed in the pump housing 10 by its camshaft 60, and 4 reciprocal conveying mechanisms are installed in the pump housing 10, is positioned at the side with cam curve of cam 61, and arranges evenly that at circumferencial direction their center line all is parallel to the center line of camshaft 60.The drive motor 40 that is used for driving cam 61 rotations is installed in the pump housing 10 rearward end.
Shown in Fig. 6 C, cam 61 is end cams, and its cam curve is arranged on the other end opposite with the end face with camshaft 60.Each curve comprises at least two curved unit, each curved unit comprises that an energy converts the rotational motion of cam 61 to the ascend curve of plunger 69 uniform motion in a straight line, recession curve that makes plunger 69 returning positions and a transition curve that is connected ascend curve and recession curve, is provided with rounding off line (not shown) in two adjacent curve joints.In order to improve fluid pressure stability, the trimming curve (not shown) can be set at the two end part of ascend curve.
The helical pitch of every ascend curve is r=4v/mn π D
2The angle y that falls of the lift angle x of every ascend curve correspondence and every recession curve correspondence satisfies condition: m (x+y)=360 ° (not having under the transition curve situation) or m (x+y+z)=360 ° (has under the transition curve situation, z is the transition angle of transition curve correspondence), to guarantee continuously to system's feed flow.Wherein v represents that cam 61 rotates the discharge capacity in weeks, and D represents the diameter of plunger 69, and n represents the quantity of plunger 69, and n is the integer more than or equal to 4, and m represents the quantity of curved unit, for more than or equal to 2 integer.Ascend curve is preferably the uniform pitch helix, can certainly be other the curve that the rotational motion of cam 61 can be converted to plunger 69 uniform motion in a straight line.
The helical pitch of recession curve must be identical with the helical pitch of ascend curve, i.e. the helical pitch r=4v/mn π D of recession curve
2, recession curve can be the uniform pitch helix, also can be the other types curve.Transition curve can be a circular arc line, and helical pitch is zero.
Cam curve has two curved unit, and the lift angle x of the ascend curve 614 of each curved unit is 90 °, and the angle y that falls of recession curve 615 correspondences is 30 °, and the transition angle z of transition curve 616 correspondences is 60 °.The i.e. transition curve 616 of corresponding first curved unit in 615,120 ° of-180 ° of scopes of recession curve of corresponding first curved unit in 614,90 ° of-120 ° of scopes of ascend curve of corresponding first curved unit in 0 ° of-90 ° of scope of cam; The transition curve 616 of second curved unit of correspondence in 615,300 ° of-360 ° of scopes of recession curve of corresponding second curved unit in 614,270 ° of-300 ° of scopes of ascend curve of 180 ° of interior corresponding second curved unit of-270 ° of scopes.Certainly in each curved unit, the angle y that falls of recession curve 615 correspondences is not limited to 30 °, and the angle y that falls of recession curve 615 correspondences all is feasible in 10 ° of-90 ° of scopes, and correspondingly, transition curve changes in 0-80 ° of scope; When decline curve 615 correspondences angle y falls when being 90 °, each curved unit just only has an ascend curve 614 and a recession curve 615, and does not have transition curve 616.When actual design is used, the lift angle x of ascend curve 614 is 90 °, usually the angle y that falls of recession curve 615 correspondences can be in 30 ° of-55 ° of scopes, the transition angle z of transition curve 616 correspondences and guarantees falling angle y and a transition curve 616 corresponding excessive angle z and should satisfying relation y+z=90 ° of recession curve 615 correspondences in 35 ° of-60 ° of scopes.
In order to reduce the fluid pressure fluctuation, can be as the case may be under 90 ° of prerequisites of theoretical value in the angle of the ascend curve correspondence of cam curve, 1 °-5 ° or lag behind 1 °-5 ° in advance, the curve pairing angle adjacent with this ascend curve correspondingly lags behind or 1 °-5 ° in advance.The angular advance of ascend curve correspondence or hysteresis are corresponding with at the ascend curve two end part trimming curve being set, and just the angle of angle that shifts to an earlier date on the angle basis of ascend curve correspondence or hysteresis is corresponding to the shared angle of trimming curve.
Shown in Fig. 6 B, Fig. 6 D and Fig. 6 E, each reciprocal conveying mechanism comprises a plunger push rod 63, a plunger 69 and a supporting roller 62.
Supporting roller 62 is truncated cone, and cone angle is α.Be provided with central shaft 621 at supporting roller 62 middle positions.The cam curve contact matching of this supporting roller 62 and cam 61.
One end of plunger push rod 63 is fixedly connected with the plunger coaxial with it 69, and the other end is fixedly connected with plug.The other end of plunger push rod 63 extend in the pump chamber of pump head 65, is provided with the seal element (not shown) between plunger push rod 63 and pump head 65, and seal element and installation thereof can be same as the prior art, repeat no more here.
The plug of plunger push rod 63 the other ends comprises that 631, two pins of pin 631 of two positioned opposite are middle for being used to hold the groove of supporting roller 62.The two ends of the central shaft 621 of supporting roller 62 are supported on two pin 631 inboards respectively rotationally.1=90 °-α of angle β/2 between the central shaft 621 of supporting roller 62 and the center line of plunger push rod 63, α is the cone angle of taper supporting roller 62; That is to say the central shaft 621 and non-perpendicular being installed on two pins 631 of supporting roller 62, but the angle beta 1 that tilts, its purpose is to guarantee that the girth ratio of circumference and the cam curve of opposite position of arbitrary cross section of supporting roller 62 is constants, this constant can be a positive integer, also can be decimal; Furtherly, inconsistent phenomenon such as when truncated cone supporting roller 62 rolls on cam 61, can not twist.For example, the circumference of circle 622 is 0.3 with the girth ratio of cam 61 inner rings 617 at the bottom of the awl of supporting roller 62, and the circumference of the vertex of a cone circle 623 of supporting roller 62 is 0.3 with the girth of cam 61 outer rings 618 than also.
In addition, two sides that are formed at two grooves between the pin 631 are parallel to each other, the bottom surface and wherein the angle of the angle β 2 between the side can be designed as 90 °-α/2, can make plug and supporting roller 62 this part structure compact more like this, be beneficial to the volume that reduces pump, and be of value to the quality of fit that guarantees supporting roller 62 and cam 61.
If plunger push rod 63 ends are not provided with plug, supporting roller 62 also can otherwise be rotatably installed in plunger push rod 63 ends, as long as can guarantee that supporting roller 62 can be along the natural trajectory contact matching work of the cam curve of itself and cam 61.
Shown in Fig. 6 B, be provided with 4 separate pump chambers in the pump head 65,4 plungers in 4 reciprocal conveying mechanisms stretch into respectively in the pump chamber corresponding with it in 4 pump chambers, with this pump chamber cooperating.4 reciprocal conveying mechanisms are divided into two groups, these two groups of reciprocal conveying mechanisms are sequential working successively, two reciprocal conveying mechanisms in each group are synchronous workings simultaneously, with these two also synchronous workings simultaneously of the reciprocal conveying mechanism of synchronous workings two pump chambers matching simultaneously.
Be used for the liquid path distribution valve of two strings two and liquid chromatography pump, shown in Fig. 4 A and Fig. 4 B, have two working cells, each working cell has two interfaces 13.4 interfaces of two working cells of liquid path distribution valve are communicated with 4 pump chambers of pump head by connecting pipeline respectively, two pump chambers of synchronous working in the time of the corresponding pump head of two interfaces 13 of one of them working cell, two other of two interface 13 corresponding pump heads of another working cell be two pump chambers of synchronous working simultaneously, could guarantee two string two and liquid chromatography pump continuous liquid supplies like this.
Only designing in two strings two of present embodiment and the liquid chromatography pump has a pump head, and this can reduce the volume of series parallel connection liquid chromatography pump on the one hand; Make that on the other hand the installation of this application for a patent for invention is very convenient, benefit the assurance installation precision, and good installation precision is beneficial to equally and improves fluid pressure stability.Simultaneously, the liquid path distribution valve will be connected in the front end that two strings two and each pipeline of liquid chromatography pump concentrate on the pump housing, be beneficial to centralized management, safeguard, reduce the also shared spatial volumes of liquid chromatography pump of two strings two greatly, reduce the industrial design difficulty significantly.
Liquid chromatography pump embodiment 2: three string two and liquid chromatography pump
In three strings two and the liquid chromatography pump two groups of reciprocal conveying mechanisms sequential working is successively arranged, comprise 3 reciprocal conveying mechanisms synchronous working simultaneously in every group of reciprocal conveying mechanism, 3 pump chambers that match with the reciprocal conveying mechanism of these 3 while synchronous workings are the while synchronous working also.
Two strings two and liquid chromatography pump embodiment difference shown in the present embodiment three string two and liquid chromatography pump embodiment and prior figures 4A and Fig. 4 B only are: cam has 3 curved unit; Back and forth the quantity of conveying mechanism is 6; The quantity of independent pump chamber is 6 in the pump head, is used for and 6 reciprocal conveying mechanism cooperatings.
As shown in Figure 7, the cam curve in three strings two and the liquid chromatography pump has 3 curved unit, and the lift angle x of the ascend curve 614 of each curved unit is 60 °, and the angle y that falls of recession curve 615 correspondences is 45 °, and the transition angle z of transition curve 616 correspondences is 15 °.The i.e. transition curve 616 of corresponding first curved unit in 615,105 ° of-120 ° of scopes of recession curve of corresponding first curved unit in 614,60 ° of-105 ° of scopes of ascend curve of corresponding first curved unit in 0 ° of-60 ° of scope of cam; The transition curve 616 of second curved unit of correspondence in 615,225 ° of-240 ° of scopes of recession curve of corresponding second curved unit in 614,180 ° of-225 ° of scopes of ascend curve of 120 ° of interior corresponding second curved unit of-180 ° of scopes; The transition curve 616 of the 3rd curved unit of correspondence in 615,345 ° of-360 ° of scopes of recession curve of corresponding the 3rd curved unit in 614,300 ° of-345 ° of scopes of ascend curve of 240-300 ° of interior corresponding the 3rd curved unit of scope.Certainly in each curved unit, the lift angle x of ascend curve 614 is 60 °, the angle y that falls of recession curve 615 correspondences is not limited to 45 °, the angle y that falls of recession curve 615 correspondences can all be feasible in 10 ° of-60 ° of scopes, correspondingly, the transition angle z of transition curve correspondence changes in 0-50 ° of scope; When decline curve 615 correspondences angle y falls when being 60 °, just only have an ascend curve 614 and a recession curve 615 in each curved unit, and do not have transition curve 616.When actual design is used, the lift angle x of ascend curve 614 is under 60 ° of situations, usually recession curve 615 correspondences falls angle y in 40 ° of-50 ° of scopes, the transition angle z of transition curve 616 correspondences and guarantees falling angle y and a transition curve 616 corresponding excessive angle z and should satisfying relation y+z=60 ° of recession curve 615 correspondences in 10 ° of-20 ° of scopes.
In order to reduce the fluid pressure fluctuation, can be as the case may be under 60 ° of prerequisites of theoretical value in the angle of the ascend curve correspondence of cam curve, 1 °-5 ° or lag behind 1 °-5 ° in advance, the curve pairing angle adjacent with this ascend curve correspondingly lags behind or 1 °-5 ° in advance.The angular advance of ascend curve correspondence or hysteresis are corresponding with at the ascend curve two end part trimming curve being set, and just the angle of angle that shifts to an earlier date on the angle basis of ascend curve correspondence or hysteresis is corresponding to the shared angle of trimming curve.
The liquid path distribution valve only is with the difference of the liquid path distribution valve that is used for two strings two and liquid chromatography pump: each working cell has 3 interfaces 13.3 interfaces 13 of each working cell are communicated with by the pump chamber of connecting pipeline with 3 while synchronous workings of pump head respectively.
In the present embodiment, the remaining part identical with two strings two and liquid chromatography pump embodiment repeats no more.
In the series parallel connection liquid chromatography pump that is provided with end cam (be that cam curve is arranged on the end face of cam, and on the on-circular), according to formula r=4v/mn π D
2, m (x+y)=360 °, perhaps according to formula r=4v/mn π D
2M (x+y+z)=360 °, wherein r represents the helical pitch of ascend curve or recession curve, x represents the lift angle of every ascend curve correspondence, y represents the angle that falls of every recession curve correspondence, v represents cam rotation one all series parallel connection liquid chromatogram pump deliveries, D represents the diameter of plunger, n represents the quantity of plunger, m represents the quantity of curved unit, can also derive multiple different specific embodiment: for example, need only coincidence formula n=2m in many strings two and liquid chromatography pump, can select: m=4, n=8; During m=5, n=10; During m=6, n=12, or the like.In many strings 3 and liquid chromatography pump, as long as coincidence formula n=3m can select: m=2, n=6; M=3, n=9; During m=4, n=12, or the like.In a word, when on using, needing to design the parallel connection of multiple-unit curve P group, all be fine as long as meet n=Pm.Again according to liquid chromatography pump embodiment one and liquid chromatography pump embodiment two, adapt with these a few embodiments of deriving, can derive a plurality of embodiments that liquid path distribution valve of the present invention is installed, in these embodiments, the working cell number of liquid path distribution valve is identical with the quantity of reciprocal conveying mechanism of parallel operation in string and the liquid chromatography pump, the quantity of interface is identical with the quantity of reciprocal conveying mechanism of series operation in string and the liquid chromatography pump in each working cell number, with the interface in the liquid path distribution valve and string also the respective pump chambers in the pump head of liquid chromatography pump be communicated with and get final product.Here give an example no longer one by one.
Be provided with the comparison in the liquid chromatography pump design of the series parallel connection liquid chromatography pump of end cam and existing other several types: when flow one regularly, four Room in this application for a patent for invention liquid chromatography pump embodiment's in parallel single plunger stroke can be significantly less than single plunger stroke in the liquid chromatography pump in parallel of each traditional type, but therefore several times working life of improving the series parallel connection liquid chromatography pump; When plunger stroke one timing, the liquid supply rate meeting of the series parallel connection liquid chromatography pump of this application for a patent for invention is obviously greater than the liquid chromatography pump of each traditional type, and is this in the coabsolute advantage of liquid supply rate, can bring the liquid chromatogram application more vast imagination space.What in sum, the series parallel connection liquid chromatography pump of this application for a patent for invention brought to us is completely new concept.The application of end cam in liquid chromatography pump not only reduced the design difficulty of cam significantly, improved fluid pressure stability, and made the multicell series parallel connection of liquid chromatography pump be integrated into a limited space, reduced the volume of chromatogram pump.Meanwhile, the various connecting pipelines of series parallel connection liquid chromatography pump are all concentrated and are connected on the liquid path distribution valve, have simplified spatial arrangement, have optimized industrial design, and have made things convenient for maintenance, repairing.
Liquid chromatography pump embodiment 3: four string two and liquid chromatography pump
In four strings two and the liquid chromatography pump two groups of reciprocal conveying mechanisms sequential working is successively arranged, comprise 4 reciprocal conveying mechanisms synchronous working simultaneously in every group of reciprocal conveying mechanism, 4 pump chambers that match with the reciprocal conveying mechanism of these 4 while synchronous workings are the while synchronous working also.
Two strings two and liquid chromatography pump embodiment difference shown in the present embodiment four string two and liquid chromatography pump embodiment and prior figures 4A and Fig. 4 B are: cam 80 has 4 curved unit; Back and forth the quantity of conveying mechanism has 8; The quantity of independent pump chamber is 8 in the pump head 90, is used for and 8 reciprocal conveying mechanism cooperatings.
Shown in Fig. 8 A and Fig. 8 B, the liquid path distribution valve in the present embodiment only is with the difference of the liquid path distribution valve that is used for two strings two and liquid chromatography pump: each working cell has 4 interfaces 13.4 interfaces 13 of each working cell are communicated with by the pump chamber of connecting pipeline 70 with 4 while synchronous workings of pump head respectively.In the present embodiment, the remaining part identical with two strings two and liquid chromatography pump embodiment repeats no more.
During work, drive motor 40 drives cam 80 and moves in a circle, under four sets of curves effects on the cam 80,8 reciprocal conveying mechanisms are done straight reciprocating motion, wherein 4 reciprocal conveying mechanisms are one group, while synchronization motion, the direction of action of two groups of reciprocal conveying mechanisms.One group of reciprocal conveying mechanism of wherein 4 pump chamber correspondences of pump head 90 is 90 ° and evenly distributes, cam 80 each reciprocal conveying mechanism that rotates a circle is finished 4 feed liquors and 4 feed flows to system, and and another organize reciprocal conveying mechanism parallel connection, alternately finish continuous liquid supply to system.Each pump chamber of pump head 90 has only been used a passage, be connected by the corresponding interface of connecting pipeline 70 with the liquid path distribution valve, 4 pump chambers of 4 reciprocal conveying mechanism cooperatings of synchronousing working with the while are communicated to the interface of the same working cell of liquid path distribution valve respectively by connecting pipeline 70, when 4 reciprocal conveying mechanisms move imbibition simultaneously, under the effect of pump chamber negative pressure, fluid closed check valve in the feed liquor one-way valve opens in the liquid entering hole, liquid outlet; When 4 reciprocal conveying mechanisms move simultaneously feed flow, under the effect of pump chamber malleation, fluid one-way valve opens, feed liquor closed check valve.
The liquid chromatography pump of this enforcement, the liquid path distribution valve all concentrates on the front end of pump with all liquid inlet and outlet pipelines, and shared space is little, and liquid is short out, the industrial design advantages of simple; Simultaneously, installation, debugging and maintenance are all very convenient.
Liquid chromatography pump of the present invention, the application of liquid path distribution valve on liquid chromatography pump arranges a plurality of pump chambers at circumferencial direction for a pump head, and a plurality of pump series parallel connection design of the super large discharge pump of feed flow simultaneously together provide possibility.With regard to this enforcement, under the plunger diameter prerequisite identical with stroke, the liquid supply rate of pump improves 32 times than 180 ° of traditional double-cam liquid chromatography pumps shown in Figure 3, and this quantity also is the limit that the liquid path distribution valve can provide far from.
Liquid chromatography pump embodiment 4
As previously mentioned, 180 ° of single cams liquid chromatography pump in parallel shown in Figure 1 comprises that cam 51, a symmetry are installed in two reciprocal conveying mechanisms and two pump heads 55 of cam 51 both sides, each pump head 55 comprises pump chamber 56 and inlet opening 57 that is communicated with pump chamber 56 respectively and outage 58, in inlet opening 57 and the outage 58 one-way valve is installed separately, two one-way valves connect liquid supplying device and feeler mechanism respectively.Each connecting pipeline in this kind liquid chromatography pump etc. relatively disperse on space layout, the industrial design difficulty; And the shared volume of carrier fluid part is big, causes the liquid chromatography pump overall volume big, needs very big containing space.If equipped liquid path distribution valve of the present invention, these problems can be resolved at once.
The liquid path distribution valve of Fig. 4 A is installed near the pump head 55 the fixing frame, perhaps is installed on other the device that is equivalent to fixing frame, do not need one-way valve is installed in the inlet opening 57 of pump head 55 and the outage 58 again, and only as liquid entering hole and liquid outlet; Two interfaces of one of them working cell of liquid path distribution valve are communicated with the liquid entering hole and the liquid outlet of a pump head respectively, and two interfaces of another working cell of liquid path distribution valve are communicated with the liquid entering hole and the liquid outlet of another pump head respectively.Two one-way valves of liquid path distribution valve connect liquid supplying device and feeler mechanism respectively.So just messy pipeline in 180 ° of single cam liquid chromatography pumps in parallel is brought together, has not only reduced the volume of pump, main is to have simplified allocation of industry, has optimized industrial design.Therefore, installed liquid path distribution valve of the present invention additional after, the extensive use of traditional various single cam serial or parallel connection liquid chromatography pump becomes possibility.
As a same reason, the liquid path distribution valve shown in Fig. 4 A also can be installed on 180 ° of double-cam liquid chromatography pumps shown in Figure 3.Liquid path distribution valve with three working cells also can be installed on 120 ° of single cams liquid chromatography pump in parallel shown in Figure 2.
Though described the present invention with reference to several exemplary embodiments, should be appreciated that used term is explanation and exemplary and nonrestrictive term.The spirit or the essence that do not break away from invention because the present invention can specifically implement in a variety of forms, so be to be understood that, the foregoing description is not limited to any aforesaid details, and should be in the spirit and scope that claim limited of enclosing explain widely, therefore fall into whole variations in claim or its equivalent scope and remodeling and all should be the claim of enclosing and contain.
Claims (11)
1. liquid path distribution valve, comprise valve body (1), it is characterized in that: on described valve body (1), be provided with at least two working cells, each described working cell comprises a liquid entering hole (11), a liquid outlet (12) and at least two interfaces (13), described liquid entering hole (11), liquid outlet (12) and at least two interfaces (13) interconnect in described valve body (1), in each described liquid entering hole (11) and each the described liquid outlet (12) one-way valve (2) are installed respectively.
2. liquid path distribution valve as claimed in claim 1, it is characterized in that: described valve body (1) is provided with two working cells, and the center line setting of the center line of the liquid entering hole (11) in each described working cell, the center line of liquid outlet (12) and each interface (13) at grade.
3. liquid path distribution valve as claimed in claim 2 is characterized in that: the center line of the liquid entering hole (11) in each described working cell and the center line of liquid outlet (12) are arranged on same the straight line.
4. liquid path distribution valve as claimed in claim 3 is characterized in that: the quantity of described interface (13) is even number, and described even number interface (13) is symmetricly set on the both sides of this straight line.
5. liquid chromatography pump, comprise at least two pump heads, an inlet opening and an outage that each pump head is provided with a pump chamber and is communicated with this pump chamber respectively, it is characterized in that: also comprise each described liquid path distribution valve as claim 1-4, the quantity of the working cell of described liquid path distribution valve is identical with the quantity of pump head, and each working cell is provided with two interfaces; Two interfaces of one of them working cell of described liquid path distribution valve are communicated with inlet opening and outage on the corresponding pump head by connecting pipeline respectively.
6. liquid chromatography pump, comprise have camshaft cam (61), pump head (65) and at least 4 the reciprocal conveying mechanisms of (60), it is characterized in that: also comprise each described liquid path distribution valve as claim 1-4, be provided with pump chamber that back and forth conveying mechanism quantity is identical in the wherein said pump head (65), each is separate, be not communicated with mutually; Described each reciprocal conveying mechanism comprises plunger push rod (63), be fixedly connected on these plunger push rod (63) one ends and the plunger (69) coaxial with it, be installed in the supporting roller (62) of described plunger push rod (63) the other end rotationally, described supporting roller (62) is worked with the cam curve contact matching of described cam (61), described cam (61) is an end cam, its cam curve is arranged on the other end opposite with the end face with camshaft (60), described cam curve comprises 2-5 curved unit, each curved unit comprises that an energy that is arranged in order converts the rotational motion of described cam (61) to the ascend curve of described plunger (69) uniform motion in a straight line, article one, make recession curve and a transition curve of described plunger (69) returning position, the two end part of described ascend curve are provided with trimming curve respectively, the joint of two adjacent curves is provided with the rounding off line, the helical pitch of described ascend curve and described recession curve is identical, is r=4v/mn π D
2The transition angle z that falls angle y and every described transition curve correspondence of the lift angle x of every described ascend curve correspondence, every described recession curve correspondence satisfies condition: m (x+y+z)=360 °, wherein v represents that described cam (61) rotates all described series parallel connection liquid chromatogram pump deliveries, D represents the diameter of described plunger (69), n represents the quantity of plunger (69), n is the integer more than or equal to 4, and m represents the quantity of curved unit, and m is the integer more than or equal to 2; Described at least 4 reciprocal conveying mechanisms are arranged in the side with cam curve of described cam, and evenly arrange at circumferencial direction, their center line all is parallel to the center line of described camshaft (60), and the other end of 4 plungers (69) of described at least 4 reciprocal conveying mechanisms stretches in 4 pump chambers of described pump head (65) cooperating with it respectively; Described supporting roller (62) is a truncated cone, and the circumference of any two cross sections of this supporting roller (62) equates with the ratio of the girth of the cam curve of opposite position; The quantity of interface is identical with the pump chamber quantity of described pump head on the described liquid path distribution valve, each interface of the same working cell of liquid path distribution valve respectively by connecting pipeline with described pump head the time each pump chamber of synchronous working be communicated with.
7. series parallel connection liquid chromatography pump as claimed in claim 6 is characterized in that: described ascend curve is the uniform pitch helix; Described recession curve is the uniform pitch helix.
8. series parallel connection liquid chromatography pump as claimed in claim 6 is characterized in that: the quantity m=2 of described curved unit; The quantity of described reciprocal conveying mechanism is 4; The lift angle x=90 of described ascend curve °, the angle y that falls of described recession curve correspondence is 30 °-55 °, the transition angle z=x-y of described transition curve correspondence.
9. series parallel connection liquid chromatography pump as claimed in claim 6 is characterized in that: the quantity m=3 of described curved unit; The quantity of described reciprocal conveying mechanism is 6; The lift angle x=60 of described ascend curve °, the angle y that falls of described recession curve correspondence is 40 °-50 °, the transition angle z=x-y of described transition curve correspondence.
10. series parallel connection liquid chromatography pump as claimed in claim 6, it is characterized in that: plunger push rod (63) end in the described reciprocal conveying mechanism is fixedly connected with a plug, this plug comprises the pin (631) of two positioned opposite, be to be used to hold the groove of described supporting roller (62) in the middle of two pins (631), the two ends of the central shaft of described supporting roller (62) are supported on two described pins (631) inboard respectively rotationally, 1=90 °-α of angle β/2 between the central shaft (621) of described supporting roller (62) and the center line of described plunger push rod (63), α is the cone angle of described truncated cone supporting roller (62).
11. series parallel connection liquid chromatography pump as claimed in claim 10 is characterized in that: two sides that are formed on the middle groove of described two pins (631) are parallel to each other, wherein 2=90 °-α of angle β/2 between a side and the bottom surface.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010129801 CN102200124B (en) | 2010-03-23 | 2010-03-23 | Liquid distribution valve and liquid chromatographic pump equipped with same |
| PCT/CN2011/000486 WO2011116633A1 (en) | 2010-03-23 | 2011-03-23 | Liquid path distributing valve and liquid-phase chromatographic pump comprising the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010129801 CN102200124B (en) | 2010-03-23 | 2010-03-23 | Liquid distribution valve and liquid chromatographic pump equipped with same |
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| CN102200124A true CN102200124A (en) | 2011-09-28 |
| CN102200124B CN102200124B (en) | 2013-09-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201010129801 Active CN102200124B (en) | 2010-03-23 | 2010-03-23 | Liquid distribution valve and liquid chromatographic pump equipped with same |
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| CN (1) | CN102200124B (en) |
| WO (1) | WO2011116633A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021223332A1 (en) * | 2020-05-06 | 2021-11-11 | 北京美联泰科生物技术有限公司 | Multi-passage reversing valve and integrated multi-channel liquid passage module |
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| US5316042A (en) * | 1992-09-04 | 1994-05-31 | Daewoo Electronics Co., Ltd. | Multi-way rotary valve |
| CN2608791Y (en) * | 2003-03-27 | 2004-03-31 | 陈书祯 | Pipe network constant flow distributing valve |
| CN2729013Y (en) * | 2004-09-20 | 2005-09-28 | 岳波 | Distribution valve for granular material |
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| JP2536862B2 (en) * | 1987-02-28 | 1996-09-25 | 株式会社島津製作所 | Multi liquid transfer pump |
| JPH06101635A (en) * | 1992-09-18 | 1994-04-12 | Hitachi Ltd | Liquid chromatographic pump |
| JP3449113B2 (en) * | 1996-03-29 | 2003-09-22 | 株式会社島津製作所 | Liquid sending device for liquid chromatograph |
| CN1238717C (en) * | 2001-06-29 | 2006-01-25 | 中国科学院大连化学物理研究所 | Low-pulse high-precision efficient liquid-phase chromatographic pump with dual plungers |
| US20070189911A1 (en) * | 2006-02-16 | 2007-08-16 | Campbell Hausfeld/Scott Fetzer Company | Liquid pump |
| CN101603516A (en) * | 2009-06-26 | 2009-12-16 | 上海舜宇恒平科学仪器有限公司 | High-pressure constant flow pump for single lobe of liquid chromatograph |
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2010
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- 2011-03-23 WO PCT/CN2011/000486 patent/WO2011116633A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5316042A (en) * | 1992-09-04 | 1994-05-31 | Daewoo Electronics Co., Ltd. | Multi-way rotary valve |
| CN2608791Y (en) * | 2003-03-27 | 2004-03-31 | 陈书祯 | Pipe network constant flow distributing valve |
| CN2729013Y (en) * | 2004-09-20 | 2005-09-28 | 岳波 | Distribution valve for granular material |
| CN2783068Y (en) * | 2005-03-22 | 2006-05-24 | 北京安氧舒科技发展有限公司 | Combined air distribution valve for oxygen preparing or nitrogen preparing machine |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2021223332A1 (en) * | 2020-05-06 | 2021-11-11 | 北京美联泰科生物技术有限公司 | Multi-passage reversing valve and integrated multi-channel liquid passage module |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102200124B (en) | 2013-09-11 |
| WO2011116633A1 (en) | 2011-09-29 |
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