CN110425102A - A kind of adjustable infusion pump surging damper - Google Patents
A kind of adjustable infusion pump surging damper Download PDFInfo
- Publication number
- CN110425102A CN110425102A CN201910721983.0A CN201910721983A CN110425102A CN 110425102 A CN110425102 A CN 110425102A CN 201910721983 A CN201910721983 A CN 201910721983A CN 110425102 A CN110425102 A CN 110425102A
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- China
- Prior art keywords
- upper cover
- ontology
- diameter
- inner chamber
- face
- Prior art date
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Classifications
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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
- F04B11/00—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation
- F04B11/0091—Equalisation of pulses, e.g. by use of air vessels; Counteracting cavitation using a special shape of fluid pass, e.g. throttles, ducts
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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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
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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
- F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
- F04B53/22—Arrangements for enabling ready assembly or disassembly
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16F—SPRINGS; SHOCK-ABSORBERS; MEANS FOR DAMPING VIBRATION
- F16F15/00—Suppression of vibrations in systems; Means or arrangements for avoiding or reducing out-of-balance forces, e.g. due to motion
- F16F15/02—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems
- F16F15/04—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means
- F16F15/08—Suppression of vibrations of non-rotating, e.g. reciprocating systems; Suppression of vibrations of rotating systems by use of members not moving with the rotating systems using elastic means with rubber springs ; with springs made of rubber and metal
- F16F15/085—Use of both rubber and metal springs
Abstract
The invention discloses a kind of adjustable infusion pump surging dampers, are related to a kind of pulsation damper.Including upper cover, elastic diaphragm, ontology and adjustment device；Flow path interface, circular groove and through-hole are provided on upper lid；Locating pad, lower locating pad and elastic component are provided in ontology；It adjusts device and contacts setting, the deformation quantity of adjustable elastic component with lower locating pad；When pulsation causes flow to increase, elastic diaphragm is pressurized downward deformation, compression elastic piece, and internal flow path cavity volume becomes larger, the extra liquid in storage part.When pulsation causes flow-reduction, elastic component restores, and squeezing elastic diaphragm makes internal flow path cavity volume become smaller, and supplements the insufficient liquid in part, to achieve the purpose that alleviate flow pulsation；The present invention is pulsed, and alleviation range is adjustable, and good airproof performance, elastic diaphragm can be replaced, and structure is simple and at low cost.
Description
Technical field
The present invention relates to a kind of pulsation damper more particularly to a kind of adjustable infusion pump surging dampers.
Background technique
Can continuous transfusion high performance liquid chromatography infusion pump frequently with serial or parallel connection formula reciprocating plunger pump configuration, plunger exists
Flow pulsation is often generated in pump chamber during alternating movement.For chromatography process, the stability of flow can shadow
Ring the repeatability of separating resulting.Repeatability is also reproducibility, is generally similarly tested under the same conditions, acquired results
Relative standard deviation.For liquid chromatographic system, flow is unstable, and separation process is just difficult to stablize, resulting chromatography point
It is just lower from result repeatability, so that relative standard deviation is become larger.Therefore it needs to eliminate or reduce flow pulsation.
Pulsation damper is the usual means for reducing flow pulsation, is generally arranged at infusion pump pump head near exit.Its work
It is to utilize the internal influence that there is the substance of certain elasticity or inelastic deformation ability to alleviate flow pulsation as principle.When pulsation is drawn
When playing flow raising, deformation mass volume becomes smaller, and so that internal flow path cavity volume is become larger by the conduction of diaphragm, and storage part is more
Remaining liquid, when pulsation causes flow-reduction, deformation mass volume becomes larger, and makes internal flow path cavity body by the conduction of diaphragm
Product becomes smaller, and supplements the insufficient liquid in part, to achieve the purpose that alleviate flow pulsation.
More filling gels, isopropanol or other buffer mediums are as deformation substance in the pulsation damper of the prior art, and
Flow pulsation can be alleviated under certain condition.But for different deformation substances, suitable pressure range is not
Together, when system pressure is too low, diaphragm can not come into full contact with deformation substance, can be more than deformation object when system pressure is excessively high
The buffering range of matter makes diaphragm reach displacement limits.It can not play the role of alleviating flow pulsation under two kinds of pressure conditions.
In addition, the lesser substance of deformation range, also smaller to the buffering effect of pulsation, the biggish substance of deformation range again there may be
Excessive deformation exceeds elasticity modulus.
For the liquid chromatographic system for using pulsation damper, system pressure and flow can be according to experiment conditions not
Pulsation damper that is same and being varied, therefore be filled only with a kind of buffer medium is only suitable for certain pressure intensity range or range of flow.
If thinking buffer traffic pulsation in other conditions, needs replacing pulsation damper or change the design of its structure, meeting when use
By larger limitation.
A kind of Chinese utility model " multiphase liquid state ripple damper " of Publication No. CN201547073U provides one kind
Multiphase liquid state ripple damper, the both ends for damping chamber enclosure are connected between dampener body and damping cavity end cap respectively, resistance
The inside of Buddhist nun's device main body is equipped with multiple damping cavities, is provided with damping diaphragm between damping cavity end cap and damping chamber enclosure, is hindering
The upper edge and lower edge of Buddhist nun's diaphragm are respectively equipped with sealing element, and inside is additionally provided with auxiliary reset device, the auxiliary reset
The surface of device is equipped with multiple through-holes, and edge is downwardly extending multiple elastic components, sets between the side of adjacent elastic members
There is opening.The utility model is all provided with multiple equipped with different damping liquid with the damping cavity for damping diaphragm and auxiliary reset device
It is placed in the inside of dampener body, good damping action can be played to the pressure oscillation of different system pressures, to meet system
The damping of pressure different level section needs, and realizes that high performance liquid chromatograph liquid-supplying system is all available in bigger pressure range
The effect of minimal ripple.But the utility model volume is larger, higher cost, and inconvenient for use.
It is adjustable that a kind of Chinese utility model " damping adjustable damper " of Publication No. CN205278209U provides damping
Damper.Mainly by piston rod, retaining ring, sealing device, front end housing, guiding device, piston head, nut, cylinder body, back cylinder cover, close
Seal the devices such as guiding device composition；Cylinder body is provided with piston rod assembly (being made of piston rod, piston head, nut), and front end housing exists
Between piston rod and cylinder body, it is respectively arranged between piston rod and front end housing, between front end housing and cylinder body, between back cylinder cover and cylinder body close
Seal apparatus；There is guiding device between piston head and cylinder body；Retaining ring is housed, retaining ring prevents front and back cylinder cap between cylinder body and front and back cylinder cap
It falls off from cylinder body, retaining ring is housed inside front end housing, retaining ring prevents sealing from falling off；Gap between cylinder body and front and back cylinder cap is full of
Elastic cement；Piston head end and back cylinder cover inner hole is tapered, has damping hole to be dislocatedly distributed on piston rod, adjusts live as needed
Chock plug shelters from the size of hole area on piston rod, to adjust the size of damping force, to realize the adjustable effect of damping.This is practical
New application range is wide, energy storage is big, light-weight, and damping performance is good, and it is small in size, energy consumption height, simple to install, be not easy to let out
Leakage.But device is complicated, higher cost.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of pulsation alleviate range is adjustable, good airproof performance, diaphragm can be more
It changes, the adjustable pulsation damper for high performance liquid chromatography infusion pump that structure is simple, at low cost.
To solve the above problems, the technical solution of the present invention is as follows:
A kind of adjustable infusion pump surging damper includes upper cover, elastic diaphragm, ontology and adjustment device, the upper cover and
Ontology is cylindrical, and the upper cover and ontology are fixedly and coaxially connected；
Far from flow path interface is axially provided with to ontology direction on one side end face of ontology, the flow path interface is set the upper cover
Two are set to, described two flow path interfaces are located on same circumference；
The upper cover is provided with circular groove, the circular groove and two flow path interface positions on one side end face of ontology
In on same periphery；
Through-hole is axially provided between the flow path interface and circular groove, the through-hole diameter is less than flow path interface and leads to
The diameter of hole contact site, the through-hole diameter are less than the width of circular groove；
The ontology is provided with first inner chamber close to upper cover side end face center, and the first inner chamber is tubular, and described the
The diameter of one inner cavity is greater than the outer diameter of circular groove, and the ontology between upper cover side end face center and first inner chamber far from being arranged
There is second inner chamber, the second inner chamber is tubular, is overlapped with first inner chamber axis, and the second inner chamber diameter is less than first inner chamber
Diameter；
The first inner chamber is provided with locating pad, and the second inner chamber is provided with lower locating pad, the upper locating pad with
Elastic component is fixedly installed between lower locating pad, the upper locating pad is spherical, the upper locating pad circular end face and elasticity
Part is fixedly connected, and the upper locating pad disc diameter is equal with first inner chamber diameter；
The elastic diaphragm is circle, and the elastic diaphragm diameter is greater than the first inner chamber diameter, the elastic diaphragm
It is fixedly installed between upper cover and the opposite end face of ontology at center；
The adjustment device contacts setting with lower locating pad, for adjusting the deformation quantity of elastic component.
Further, the second inner chamber is provided with internal screw thread far from surface at upper cover end, and the adjustment device is tubular,
The adjustment assembly dia is equal with second inner chamber diameter, and the adjustment device side is provided with outer spiral shell corresponding with internal screw thread
Line.
Further, the adjustment device is micrometer head, including sleeve and screw rod, the sleeve are fixedly connected on second
Inner cavity is far from upper cover side.
Further, the mode that is fixedly connected is to be bolted, axial on the outside of the upper cover to be provided with tapped through hole, institute
Tapped through hole at least two is stated, the tapped through hole is uniformly arranged using upper cover axis as the center of circle along same circumference, described
Ontology is provided with threaded hole corresponding with upper cover tapped through hole.
Further, the tapped through hole is set as eight.
Further, the upper cover is axially provided with ring-shaped depression close to one side end face of ontology centered on axis, described
Ring-shaped depression internal diameter is greater than or slightly larger than diaphragm diameter, and the ring-shaped depression outer diameter is equal to upper cover diameter, and the ontology is close to upper
One side end face of lid is centered on axis, and axially extending annular protrusion out, the annular protrusion internal diameter is identical as ring-shaped depression internal diameter,
The annular protrusion height is less than ring-shaped depression height.
Further, the ontology is provided with concentric close to the annular region that one side end face of upper cover is in contact with diaphragm
Annular leakproof recess, the leakproof concave cross-section are " v " shape, and the ontology forms platform close to one side end face of upper cover and the first cavity
Rank is provided with chamfering at the step.
Further, the ontology is provided with concentric close to the annular region that one side end face of upper cover is in contact with diaphragm
Annular leakproof recess, the leakproof concave cross-section are " v " shape, and the ontology forms platform close to one side end face of upper cover and the first cavity
Rank is provided with chamfering at the step.
Further, the resilient diaphragm material is inertia fluorine polymeric material or stainless steel, the inertia fluorine polymeric material
It is copolymerized including polytetrafluoroethylene (PTFE), polyvinyl fluoride, tetrafluoroethene-perfluorinated alkoxy vinyl ether copolymer or perfluoroethylenepropylene
Object.
Further, the elastic component is spiral compression spring, disk spring or gas spring.
Compared with prior art, the invention has the following beneficial effects:
1. the present invention adjusts the deformation quantity of elastic component by setting tightening device, it is adapted to different pulsation and alleviates model
It encloses.It is set as micrometer head by the way that device will be adjusted, the deformation quantity of elastic component can be accurately adjusted, preferably adapt to different arteries and veins
It is dynamic to alleviate range.
2. the present invention makes the sealing of elastic diaphragm by the way that leakproof recess and chamfering are arranged between elastic diaphragm and end face
Become linear sealing, improves the leakproofness of device.
3. the present invention is bolted by setting, dismantle the present invention, so that replacement generates deformation because using for a long time
Elastic diaphragm, realize sustainable use, reduce costs.
Detailed description of the invention
Specific embodiments of the present invention will be described in further detail with reference to the accompanying drawing.
Fig. 1 is schematic diagram of the present invention；
Fig. 2 is schematic cross-sectional view of the present invention；
Fig. 3 is upper cover schematic diagram of the present invention；
Fig. 4 is ontology schematic diagram of the present invention；
Fig. 5 is present invention band micrometer head schematic diagram；
Wherein, 1 is upper cover；2 be ontology；3 be elastic diaphragm；4 be adjustment device；41 be micrometer head；5 connect for flow path
Mouthful；6 be circular groove；7 be first inner chamber；8 be second inner chamber；9 be upper locating pad；10 be lower locating pad；11 be elastic component；12
For tapped through hole；13 be ring-shaped depression；14 be protrusion；15 are recessed for leakproof；16 be chamfering.
Specific embodiment
In order to be easy to understand to technical means, creative features, achievable purpose and effectiveness of the invention, below with reference to tool
Body diagram, the present invention is further explained.
Embodiment 1:
It is as shown in Figs 1-4 a kind of adjustable infusion pump surging damper, including upper cover 1, elastic diaphragm 3 and is adjusted ontology 2
Engagement positions 4.The upper cover 1 and ontology 2 are cylindrical, it is generally the case that the diameter of upper cover 1 is set as being slightly less than ontology 2
Diameter, the height of upper cover 1 is set smaller than the height of ontology 2, and upper cover 1 and the shape of ontology 2 are not limited to cylindrical.It is described
Upper cover 1 and 2 axis of ontology are overlapped and contact with each other, and the two mutually fits closely under normal conditions, to compress elastic diaphragm 3, institute
Upper cover 1 is stated to be fixedly connected with ontology 2.
It is to be bolted that upper cover 1 was fixedly connected with ontology 2, which is fixedly connected with mode,.Spiral shell is axially provided in 1 outside of upper cover
Line through-hole 12, tapped through hole 12 set at least to two, further, are set as eight.Tapped through hole 12 is with 1 axis of upper cover
The center of circle is uniformly arranged along same circumference.Ontology 2 is provided with threaded hole corresponding with 1 tapped through hole 12 of upper cover.Pass through
Axial bolt connection can be very good to fix upper cover 1 and ontology 2, while be supplied to the compression of 3 one axial directions of elastic diaphragm
Power fixes elastic diaphragm 3, while improving leakproofness.
In upper cover 1 far from being axially provided with two flow path interfaces 5, two flow paths to 2 direction of ontology on 2 one side end face of ontology
Interface 5 is located on same circumference, and preferred embodiment is setting symmetric about the axis.The shape of flow path interface 5 is that liquid chromatogram is general
Interface Shape, be followed successively by the threaded portion of tubular, the sword ring portion of truncated cone-shaped and the liquid outlet portion of tubular from top to bottom, liquid outlet
Lower end is connected with through-hole, and the diameter of liquid outlet is greater than the diameter of through-hole.
Circular groove 6 is provided on 2 one side end face of ontology in upper cover 1, it is straight among 6 outer diameter of circular groove and internal diameter
Diameter is formed by circumference and the axis of two flow path interfaces 5 is located on same periphery.
Through-hole is axially provided between flow path interface 5 and circular groove 6, through-hole diameter is less than flow path interface 5 and connects with through-hole
The diameter of contact portion position, through-hole diameter are less than the width of circular groove 6.
Ontology 2 is axially provided with first inner chamber 7 to 1 opposite direction of upper cover close to 1 side end face center of upper cover.First inner chamber
7 be tubular, has a diameter larger than the outer diameter of circular groove 6.In ontology 2 far between 1 side end face center of upper cover and first inner chamber 7
It is provided with second inner chamber 8.Second inner chamber 8 is tubular, is overlapped with 7 axis of first inner chamber.8 diameter of second inner chamber is less than first inner chamber
7 diameters；
First inner chamber 7 is provided with locating pad 9, and second inner chamber 8 is provided with lower locating pad 10, upper locating pad 9 with it is lower fixed
Elastic component 11 is fixedly installed between the pad 10 of position.Further, the elastic component 11 select spiral compression spring, disk spring or
Gas spring.Upper locating pad 9 be it is spherical, upper 9 circular end face of locating pad is fixedly connected with elastic component 11, upper 9 disc of locating pad
Diameter is equal with 7 diameter of first inner chamber.Upper locating pad 9 can be axially moved in first inner chamber 7.Lower 10 lower part of locating pad is set as
It is parallel to end face.When nature, elastic component 11 withstands locating pad 9, and upper locating pad 9 withstands elastic diaphragm 3, gives elastic diaphragm
3 one initial pressures.
Elastic diaphragm 3 is circle, and 3 diameter of elastic diaphragm is greater than 7 diameter of first inner chamber, the elastic diaphragm 3
It is fixedly installed between upper cover 1 and the opposite end face of ontology 2 at center.Further, resilient diaphragm material is the polymerization of inertia fluorine
Material or stainless steel.Inertia fluorine polymeric material is exactly that chemical property is more stable, the one kind that do not react with most of organic solvents
Polymer containing fluorine element.Inertia fluorine polymeric material includes polytetrafluoroethylene (PTFE), polyvinyl fluoride, tetrafluoroethene-perfluoro alkoxy second
Alkenyl ether copolymer or fluorinated ethylene propylene copolymer etc..Elastic diaphragm 3 is extruded the shallow annular line of outer ring by upper cover 1 and ontology 2,
Forming face sealing.
Further, the ontology 2 is provided with close to the annular region that 1 one side end face of upper cover is in contact with elastic diaphragm 3
The annular leakproof recess 15 of concentric, the leakproof 15 sections that are recessed are " v " shape, the ontology 2 close to 1 one side end face of upper cover with
First cavity forms step, is provided with chamfering 16 at the step.There are gaps between leakproof recess 15 and chamfering 16.Pass through conjunction
The size of setting leakproof recess 15 is managed, two annulars of compression formation are linear respectively at the both ends of leakproof recess 15 for elastic diaphragm 3
Shallow line, sealing means change into two layers of linear sealing by face sealing, and sealing shape is more preferable.
In use, the interface of liquid chromatogram pipeline and outlet are respectively connected to flow path interface 5, mobile phase enters circle from through-hole
Connected in star 6 squeezes elastic diaphragm 3, and the downward deformation of elastic diaphragm 3, mobile phase is through the formation between elastic diaphragm 3 and upper cover 1
It is flowed out from the flow path interface 5 of outlet inner cavity.When pulsation causes flow to increase, elastic diaphragm 3 is pressurized downward deformation, compresses bullet
Property part 11, internal flow path cavity volume becomes larger, the extra liquid in storage part.When pulsation causes flow-reduction, elastic component
11 restore, and squeezing elastic diaphragm 3 makes internal flow path cavity volume become smaller, and supplement the insufficient liquid in part, to reach alleviation stream
Measure the purpose of pulsation.
Surface at 1 end of upper cover is provided with internal screw thread in second inner chamber 8, the adjustment device 4 is tubular, the adjustment
4 diameter of device is equal with 8 diameter of second inner chamber, and side is provided with external screw thread corresponding with internal screw thread.Adjust 4 inner face of device
It is contacted with lower locating pad 10, outer end face is set as interior hexagon, it is facilitated to be submerged in the second cavity completely.
In use, adjusting the deformation quantity of elastic component 11 according to the actual conditions rotation adjuster 4 of pulsation and pressure.
Embodiment 2:
As shown in figure 5, the difference of the present embodiment and embodiment 1 is only that adjustment device 4 is set as micrometer head 41, including
Sleeve and screw rod, the sleeve are fixedly connected on second inner chamber 8 far from 1 side of upper cover.
In use, can be according to the actual conditions rotation adjuster 4 of pulsation and pressure, the accurate deformation for adjusting elastic component 11
Amount.
Embodiment 3:
It is as shown in Figs 1-4 a kind of adjustable infusion pump surging damper, including upper cover 1, elastic diaphragm 3 and is adjusted ontology 2
Engagement positions 4.The upper cover 1 and ontology 2 are cylindrical, it is generally the case that the diameter of upper cover 1 is set as being slightly less than ontology 2
Diameter, the height of upper cover 1 is set smaller than the height of ontology 2, and upper cover 1 and the shape of ontology 2 are not limited to cylindrical.It is described
Upper cover 1 and 2 axis of ontology are overlapped and contact with each other, and the two mutually fits closely under normal conditions, to compress elastic diaphragm 3, institute
Upper cover 1 is stated to be fixedly connected with ontology 2.
It is to be bolted that upper cover 1 was fixedly connected with ontology 2, which is fixedly connected with mode,.Spiral shell is axially provided in 1 outside of upper cover
Line through-hole 12, tapped through hole 12 set at least to two, further, are set as eight.Tapped through hole 12 is with 1 axis of upper cover
The center of circle is uniformly arranged along same circumference.Ontology 2 is provided with threaded hole corresponding with 1 tapped through hole 12 of upper cover.Pass through
Axial bolt connection can be very good to fix upper cover 1 and ontology 2, while be supplied to the compression of 3 one axial directions of elastic diaphragm
Power fixes elastic diaphragm 3, while improving leakproofness.
In upper cover 1 far from being axially provided with two flow path interfaces 5, two flow paths to 2 direction of ontology on 2 one side end face of ontology
Interface 5 is located on same circumference, and preferred embodiment is setting symmetric about the axis.The shape of flow path interface 5 is that liquid chromatogram is general
Interface Shape, be followed successively by the threaded portion of tubular, the sword ring portion of truncated cone-shaped and the liquid outlet portion of tubular from top to bottom, liquid outlet
Lower end is connected with through-hole, and the diameter of liquid outlet is greater than the diameter of through-hole.
Circular groove 6 is provided on 2 one side end face of ontology in upper cover 1, it is straight among 6 outer diameter of circular groove and internal diameter
Diameter is formed by circumference and the axis of two flow path interfaces 5 is located on same periphery.
Through-hole is axially provided between flow path interface 5 and circular groove 6, through-hole diameter is less than flow path interface 5 and connects with through-hole
The diameter of contact portion position, through-hole diameter are less than the width of circular groove 6.
Ontology 2 is axially provided with first inner chamber 7 to 1 opposite direction of upper cover close to 1 side end face center of upper cover.First inner chamber
7 be tubular, has a diameter larger than the outer diameter of circular groove 6.In ontology 2 far between 1 side end face center of upper cover and first inner chamber 7
It is provided with second inner chamber 8.Second inner chamber 8 is tubular, is overlapped with 7 axis of first inner chamber.8 diameter of second inner chamber is less than first inner chamber
7 diameters；
First inner chamber 7 is provided with locating pad 9, and second inner chamber 8 is provided with lower locating pad 10, upper locating pad 9 with it is lower fixed
Elastic component 11 is fixedly installed between the pad 10 of position.Further, the elastic component 11 select spiral compression spring, disk spring or
Gas spring.Upper locating pad 9 be it is spherical, upper 9 circular end face of locating pad is fixedly connected with elastic component 11, upper 9 disc of locating pad
Diameter is equal with 7 diameter of first inner chamber.Upper locating pad 9 can be axially moved in first inner chamber 7.Lower 10 lower part of locating pad is set as
It is parallel to end face.When nature, elastic component 11 withstands locating pad 9, and upper locating pad 9 withstands elastic diaphragm 3, gives elastic diaphragm
3 one initial pressures.
Upper cover 1 close to 2 one side end face of ontology centered on axis, it is axially extending go out ring-shaped depression 13.The ring-shaped depression
13 internal diameters are greater than or slightly larger than 3 diameters of elastic diaphragm, and 13 outer diameter of ring-shaped depression is equal to 1 diameter of upper cover.The ontology 2 is close
1 one side end face of upper cover is centered on axis, axially extending annular protrusion 14 out, 14 internal diameter of annular protrusion and ring-shaped depression 13
Internal diameter is identical, and 14 height of annular protrusion is less than 13 height of ring-shaped depression.Such setting joint bolt, can make upper cover 1
It presses tighter with ontology 2, improves leakproofness.
Elastic diaphragm 3 is circle, and 3 diameter of elastic diaphragm is greater than 7 diameter of first inner chamber, the elastic diaphragm 3
It is fixedly installed between upper cover 1 and the opposite end face of ontology 2 at center.Further, resilient diaphragm material is the polymerization of inertia fluorine
Material or stainless steel.Inertia fluorine polymeric material is exactly that chemical property is more stable, the one kind that do not react with most of organic solvents
Polymer containing fluorine element.Inertia fluorine polymeric material includes polytetrafluoroethylene (PTFE), polyvinyl fluoride, tetrafluoroethene-perfluoro alkoxy second
Alkenyl ether copolymer or fluorinated ethylene propylene copolymer etc..Elastic diaphragm 3 is extruded the shallow annular line of outer ring by upper cover 1 and ontology 2,
Forming face sealing.
Further, the ontology 2 is provided with close to the annular region that 1 one side end face of upper cover is in contact with elastic diaphragm 3
The annular leakproof recess 15 of concentric, the leakproof 15 sections that are recessed are " v " shape, the ontology 2 close to 1 one side end face of upper cover with
First cavity forms step, is provided with chamfering 16 at the step.There are gaps between leakproof recess 15 and chamfering 16.Pass through conjunction
The size of setting leakproof recess 15 is managed, two annulars of compression formation are linear respectively at the both ends of leakproof recess 15 for elastic diaphragm 3
Shallow line, sealing means change into two layers of linear sealing by face sealing, and sealing shape is more preferable.
In use, the interface of liquid chromatogram pipeline and outlet are respectively connected to flow path interface 5, mobile phase enters circle from through-hole
Connected in star 6 squeezes elastic diaphragm 3, and the downward deformation of elastic diaphragm 3, mobile phase is through the formation between elastic diaphragm 3 and upper cover 1
It is flowed out from the flow path interface 5 of outlet inner cavity.When pulsation causes flow to increase, elastic diaphragm 3 is pressurized downward deformation, compresses bullet
Property part 11, internal flow path cavity volume becomes larger, the extra liquid in storage part.When pulsation causes flow-reduction, elastic component
11 restore, and squeezing elastic diaphragm 3 makes internal flow path cavity volume become smaller, and supplement the insufficient liquid in part, to reach alleviation stream
Measure the purpose of pulsation.
Surface at 1 end of upper cover is provided with internal screw thread in second inner chamber 8, the adjustment device 4 is tubular, the adjustment
4 diameter of device is equal with 8 diameter of second inner chamber, and side is provided with external screw thread corresponding with internal screw thread.Adjust 4 inner face of device
It is contacted with lower locating pad 10, outer end face is set as interior hexagon, it is facilitated to be submerged in the second cavity completely.
In use, adjusting the deformation quantity of elastic component 11 according to the actual conditions rotation adjuster 4 of pulsation and pressure.
Embodiment 4:
As shown in figure 5, the difference of the present embodiment and embodiment 3 is only that adjustment device 4 is set as micrometer head 41, including
Sleeve and screw rod, the sleeve are fixedly connected on second inner chamber 8 far from 1 side of upper cover.
In use, can be according to the actual conditions rotation adjuster 4 of pulsation and pressure, the accurate deformation for adjusting elastic component 11
Amount.
It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, essence of the invention is not being departed from
Under the premise of mind and range, various changes and improvements may be made to the invention, these changes and improvements both fall within claimed
In invention scope.The scope of the present invention is defined by the appended claims and its equivalents.
Claims (10)
1. a kind of adjustable infusion pump surging damper, it is characterised in that: including upper cover, elastic diaphragm, ontology and adjustment device,
The upper cover and ontology are cylindrical, and the upper cover and ontology are fixedly and coaxially connected；
Far from flow path interface is axially provided with to ontology direction on one side end face of ontology, the flow path interface is set as the upper cover
Two, described two flow path interfaces are located on same circumference；
The upper cover is provided with circular groove on one side end face of ontology, and the circular groove and two flow path interfaces are located at same
On one periphery；
Through-hole is axially provided between the flow path interface and circular groove, the through-hole diameter is less than flow path interface and connects with through-hole
The diameter of contact portion position, the through-hole diameter are less than the width of circular groove；
The ontology is provided with first inner chamber close to upper cover side end face center, and the first inner chamber is tubular, in described first
The diameter of chamber is greater than the outer diameter of circular groove, and the ontology is far from being provided with the between upper cover side end face center and first inner chamber
Two inner cavities, the second inner chamber are tubular, are overlapped with first inner chamber axis, and it is straight that the second inner chamber diameter is less than first inner chamber
Diameter；
The first inner chamber is provided with locating pad, and the second inner chamber is provided with lower locating pad, the upper locating pad with it is lower fixed
Be fixedly installed elastic component between the pad of position, the upper locating pad be it is spherical, the upper locating pad circular end face and elastic component are solid
Fixed connection, the upper locating pad disc diameter are equal with first inner chamber diameter；
The elastic diaphragm is circle, and the elastic diaphragm diameter is greater than the first inner chamber diameter, and the elastic diaphragm is fixed
It is set between upper cover and the opposite end face of ontology at center；
The adjustment device contacts setting with lower locating pad, for adjusting the deformation quantity of elastic component.
2. a kind of adjustable infusion pump surging damper according to claim 1, it is characterised in that: the second inner chamber is remote
Surface at upper cover end is provided with internal screw thread, the adjustment device is tubular, the adjustment assembly dia and second inner chamber diameter
Equal, the adjustment device side is provided with external screw thread corresponding with internal screw thread.
3. a kind of adjustable infusion pump surging damper according to claim 1, it is characterised in that: the adjustment device is
Micrometer head, including sleeve and screw rod, the sleeve are fixedly connected on second inner chamber far from upper cover side.
4. a kind of adjustable infusion pump surging damper according to claim 1 or 2 or 3, it is characterised in that: the fixation
Connection type is to be bolted, and axial on the outside of the upper cover to be provided with tapped through hole, the tapped through hole at least two is described
Tapped through hole is uniformly arranged using upper cover axis as the center of circle along same circumference, and the ontology is provided with and upper cover tapped through hole
Corresponding threaded hole.
5. a kind of adjustable infusion pump surging damper according to claim 4, it is characterised in that: the tapped through hole is set
It is set to eight.
6. a kind of adjustable infusion pump surging damper according to claim 4, it is characterised in that: the upper cover is close to this
One side end face of body is axially provided with ring-shaped depression centered on axis, and the ring-shaped depression internal diameter is greater than or straight slightly larger than diaphragm
Diameter, the ring-shaped depression outer diameter be equal to upper cover diameter, the ontology close to one side end face of upper cover centered on axis, it is axially extending
Annular protrusion out, the annular protrusion internal diameter is identical as ring-shaped depression internal diameter, and it is high that the annular protrusion height is less than ring-shaped depression
Degree.
7. a kind of adjustable infusion pump surging damper according to claim 4, it is characterised in that: the ontology is close to upper
The annular region that one side end face of lid is in contact with diaphragm is provided with the annular leakproof recess of concentric, and the leakproof concave cross-section is
" v " shape, the ontology form step close to one side end face of upper cover and the first cavity, are provided with chamfering at the step.
8. a kind of adjustable infusion pump surging damper according to claim 6, it is characterised in that: the ontology is close to upper
The annular region that one side end face of lid is in contact with diaphragm is provided with the annular leakproof recess of concentric, and the leakproof concave cross-section is
" v " shape, the ontology form step close to one side end face of upper cover and the first cavity, are provided with chamfering at the step.
9. a kind of adjustable infusion pump surging damper according to claim 1, it is characterised in that: the elastic diaphragm material
Material is inertia fluorine polymeric material or stainless steel, and the inertia fluorine polymeric material includes polytetrafluoroethylene (PTFE), polyvinyl fluoride, tetrafluoro second
Alkene-perfluorinated alkoxy vinyl ether copolymer or fluorinated ethylene propylene copolymer.
10. a kind of adjustable infusion pump surging damper according to claim 1, it is characterised in that: the elastic component is
Spiral compression spring, disk spring or gas spring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910721983.0A CN110425102B (en) | 2019-08-06 | 2019-08-06 | Adjustable infusion pump pulsation damper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910721983.0A CN110425102B (en) | 2019-08-06 | 2019-08-06 | Adjustable infusion pump pulsation damper |
Publications (2)
| Publication Number | Publication Date |
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| CN110425102A true CN110425102A (en) | 2019-11-08 |
| CN110425102B CN110425102B (en) | 2020-12-22 |
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ID=68412866
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910721983.0A Active CN110425102B (en) | 2019-08-06 | 2019-08-06 | Adjustable infusion pump pulsation damper |
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| Country | Link |
|---|---|
| CN (1) | CN110425102B (en) |
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| CN111396304A (en) * | 2020-04-28 | 2020-07-10 | 徐州工业职业技术学院 | Plunger for hydraulic pump with small flow pulsation |
| CN112879385A (en) * | 2021-01-11 | 2021-06-01 | 南京航空航天大学 | Integrated actuating device based on flexible cavity group and peak-pressure flow-dividing single-piston pump |
| CN113522171A (en) * | 2021-07-21 | 2021-10-22 | 高砂电气(苏州)有限公司 | Quantitative discharging device |
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| CN113522171B (en) * | 2021-07-21 | 2024-03-19 | 高砂电气(苏州)有限公司 | Quantitative discharge device |
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| Publication number | Publication date |
|---|---|
| CN110425102B (en) | 2020-12-22 |
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