CN201273254Y - Accurately adjustable fluid feed pump - Google Patents

Accurately adjustable fluid feed pump Download PDF

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Publication number
CN201273254Y
CN201273254Y CNU2008200017430U CN200820001743U CN201273254Y CN 201273254 Y CN201273254 Y CN 201273254Y CN U2008200017430 U CNU2008200017430 U CN U2008200017430U CN 200820001743 U CN200820001743 U CN 200820001743U CN 201273254 Y CN201273254 Y CN 201273254Y
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CN
China
Prior art keywords
piston rod
piston cavity
liquid
described piston
axis
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Expired - Fee Related
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CNU2008200017430U
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Chinese (zh)
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请求不公开姓名
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杨晓勇
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Priority to CNU2008200017430U priority Critical patent/CN201273254Y/en
Application granted granted Critical
Publication of CN201273254Y publication Critical patent/CN201273254Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

The utility model discloses an accurate and adjustable liquid supply pump, which comprises a pump head, a flow regulating component and a driving component, and is characterized in that the pump head comprises a piston rod, a piston cavity body and a piston cavity seat, wherein a liquid inlet, a liquid outlet, a cleaning fluid inlet and a cleaning fluid outlet are arranged on the piston cavity body. The flow regulating component comprises an adjusting knob, an elastic plate, a connecting ring and a motor support board. The piston rod is connected with a motor shaft through an oscillating bearing and an oscillating bearing seat, the piston rod can move a certain stroke and rotate one circle in the piston cavity body when the motor rotates one circle, the piston cavity body is fixed in the piston cavity seat, the piston cavity seat is connected with the elastic plate, and the bending angle of the elastic plate is changed through adjusting the screwing length of the adjusting knob and a connecting ring to change the bending angle of the elastic plate to achieve the adjustment of flow capability of the pump when the motor rotates one circle. The liquid supply pump can achieve that liquid is transported in micro scale, and the pump head is corrosion-resisting. The liquid supply pump is particularly suitable for the fields with high liquid feeding precision requirement, little liquid feeding and timing and quantitative feeding liquid on line.

Description

Accurate adjustable liquid-feeding pump
Affiliated technical field
The utility model is a kind of liquid-feeding pump.Be specially a kind of metering pump that is used for accurate feeding in medical treatment, chemical industry, food and field, laboratory.
Technical background
The import and export of known liquid-feeding pump all have valve to come the flow direction of controlling liquid, will change the pressure of liquid outlet liquid owing to the internal motion of valve like this, thereby produce drop in the outlet port, have influenced the accuracy and the precision of feeding.And the import and export that the utility model successfully is implemented in pump by a piston that can move reciprocatingly simultaneously and rotatablely move does not have the control of valve, will improve the accuracy and the precision of feeding so greatly.
Known liquid-feeding pump because the characteristic of partially liq when pump does not use for a long time, will form some crystals in the inside of pump, often carries out clean and maintenance to pump with regard to needs like this, uses inconvenience.And the utility model can be implemented in line the pump housing is cleaned, very convenient pump is safeguarded.
The utility model pump housing has corrosion-resistant function simultaneously.Can regulate easily and control outlet fluid flow and pressure.
The model utility content
The utility model provides a kind of liquid conveying system, is particularly suitable for the conveying of accurate liquid, and is very reliable, stable.Motor whenever circles, and pump can be carried certain amount of fluid accurately, and this amount can be adjusted as required.Simultaneously can implement on-line cleaning to pump head.Pump has adaptability widely to the liquid of carrying, corrosion protection, and degree of accuracy is at positive and negative 0.5 microlitre, and precision is less than 1%CV.
In order to achieve the above object, the technical solution adopted in the utility model is:
The embodiment of the invention discloses a kind of accurate adjustable liquid-feeding pump, comprise: pump head, regulate parts and driver part, wherein, described pump head mainly comprises: piston rod, piston cavity, the piston rod attachment cap, the rod seal nut, joint shaft bearing coupling shaft and piston cavity seat, described piston rod is positioned at described piston cavity, and be slidingly connected with described piston cavity, described piston cavity is fixedlyed connected with described piston cavity seat, all have two holes on described piston cavity and the piston cavity seat symmetrically, the central lines in the hole on hole on the described piston cavity and the described piston cavity seat, one of them hole is inlet, another is outlet, one end of described piston rod has a plane breach, the other end of described piston rod is fixedlyed connected with described piston rod attachment cap, described rod seal nut is fixedlyed connected with described piston cavity seat, one end of described joint shaft bearing coupling shaft is fixedlyed connected with described piston rod attachment cap, the other end of described joint shaft coupling shaft and described driver part are connected, drive described piston rod simultaneously along the axis to-and-fro motion of described piston cavity with along the axis rotation of described piston rod by described driver part by described joint shaft coupling shaft and piston rod attachment cap, when the plane breach on the described piston rod move to described piston cavity on inlet when connecting, liquid flows into from described inlet, when the plane breach on the described piston rod move to described piston cavity on outlet when connecting, liquid flows out from described outlet, described adjusting parts are used for regulating by the reciprocating stroke that changes described piston rod the flow of described liquid-feeding pump.
Preferably, described driver part comprises: motor, joint bearing block and plain radial bearing, wherein, described joint bearing block is connected by motor shaft and described motor, one end of the described joint shaft bearing coupling shaft in described plain radial bearing and the described pump head is hinged, rotation by described motor drives described joint bearing block rotation, the rotation of described joint bearing block drives described joint shaft bearing coupling shaft slip and rotates, when between the axis of the axis of described piston rod and motor shaft when angled, the slip of described joint shaft bearing coupling shaft and rotating drives described piston rod simultaneously along the axis to-and-fro motion of described piston cavity with along the axis rotation of described piston rod.
Preferably, described adjusting parts mainly comprise: diving board, connecting ring, copper ring, adjusting knob and rotation scale, wherein, described diving board is a bending-like, one end of bending is connected by screw fit with the rod seal nut of described pump head, the other end of bending is connected by screw fit with described connecting ring, described connecting ring is fixed on the electric machine support, described adjusting knob is connected by screw-thread fit with described connecting ring, be carved with the circular scale diagraph on the described adjusting knob, be carved with the straight line diagraph on the described connecting ring, described rotation scale is connected by screw fit with described adjusting rotation, when the described adjusting knob of rotation, make described copper ring oppress described diving board and be in different bending states, drive described piston seal nut motion by described diving board, the motion of described piston seal nut drives described piston cavity seat motion, the motion of described piston cavity seat changes the angle between the axis of the axis of described piston rod and described motor shaft, and the change of described angle changes the reciprocating stroke of described piston rod; Described rotation scale and described adjusting knob rotate synchronously, indicate the flow of described liquid-feeding pump by the scale on described rotation scale and the described adjusting knob.
Preferably, described piston rod and described rod end chamber body and function ceramic material.
Preferably, a liquid inlet and a liquid outlet are arranged respectively on described piston cavity (9) and the piston cavity seat (10), and a filter washing water inlet and a rinse liquid outlet, totally 4 liquid gateways, described piston cavity seat (10) has two rings (46), (47) in its special design in place, liquid gateway around piston cavity seat cylindrical outer wall.
Preferably, described rod seal nut (12) is made by macromolecular material, and rod seal nut (12) has 3 attachment holes, and is fixedly connected by the attachment hole that screw is corresponding with diving board.
Preferably, described joint bearing block (3) has two rectangular arms, all porosely on each arm cooperates with plain radial bearing outer ring and motor shaft respectively, and the axially bored line that is connected with motor shaft is A to the hole centre distance on another arm of joint bearing block.
Preferably, along the reciprocating stroke S of piston rod axis, distance A has certain relation between these three parameters, that is: S=2Asin θ in piston cavity for the angle θ between described piston rod axis and the motor shaft axis, piston rod.
Description of drawings
Below in conjunction with accompanying drawing the utility model is further specified.
Fig. 1 is explosive view of the present utility model (an overall components constitutional diagram)
Fig. 2 is a plan view.
Fig. 3 is a plan view.
Fig. 4 is the A--A sectional view of Fig. 2.
Fig. 5 is the B--B sectional view of Fig. 4.
Fig. 6 is the normal axomometric drawing of piston rod 8.
Fig. 7 is the main sectional view of sealing gasket 11.
Embodiment
In Fig. 1, liquid-feeding pump mainly comprises following parts: pump head, Flow-rate adjustment and driver part and motor support plate 1.Pump head is by joint shaft bearing coupling shaft 6, piston rod attachment cap 7, and piston rod 8, piston cavity 9, piston cavity seat 10, sealing gasket 11, rod seal nut 12, pad 13 is formed.Flow regulating part is by diving board 14, connecting ring 15, and copper ring 16, adjusting knob 17, rotation scale 18, screw 19, screw 20, Cock screw 30 is formed.Driver part is by motor 2, joint bearing block 3, and plain radial bearing 4,5, optoelectronic switch baffle plate 24, optoelectronic switch 25, optoelectronic switch cover 26 is formed.
Pump head parts: as shown in Figure 5, piston cavity 9 is fixed in the piston cavity seat 10,31, the 32 and liquid outlets 33,34 in a liquid inlet are arranged respectively on piston cavity 9 and piston cavity seat 10, make separately liquid entering hole 31 and 32 the axial alignment and the axial alignment of liquid outlet 33 and 34 when mounted, can be connected all kinds of pipe joints with outlet 34 places at the inlet 32 of piston cavity seat 10.Must not closely cooperate between 9 and 10 has air or liquid to reveal, and piston rod 8 can smooth and easy slip piston cavity 9 in, but 8 and 9 cooperation can not make liquid produce leakage along the cooperation place between piston rod and the piston cavity.As shown in Figure 4, piston rod attachment cap 7 is adhesively fixed together with piston rod 8, and joint shaft bearing coupling shaft 6 is adhesively fixed with piston rod attachment cap 7 again and is in the same place, and this exemplar 6,7,8 just becomes as a whole.Outside thread 35 on the piston cavity seat 10 cooperates with internal thread 36 on the rod seal nut 12 and screws, there is being 2 sealing gaskets 11 and 1 pad 13 to leak along piston rod when piston rod has liquid during along the to-and-fro motion of piston rod axis preventing between 10 and 12, there are flange 37 (see figure 7)s at the endoporus place of sealing gasket 11, cooperates closely with piston rod.
Flow regulating part: diving board 14 is fixed on the connecting ring 15 by 2 screw 20 (see figure 1)s, and connecting ring 15 all is fixed on the motor support plate 1 with motor 2.As shown in Figure 4, diving board is processed into the bending state, and 38 places are flexible in bending, and bending 38 can be driven plain maybe can return to the bending state from state of applanation.The internal thread 39 of adjusting knob 17 matches with outside thread 40 on the connecting ring 15, and the outer ring face of adjusting knob 17 has annular knurl 41 (see figure 3)s, can be manually clockwise or be rotated counterclockwise the flow (see figure 2) of regulating pump.When rotation adjusting knob 17, copper ring 16 will flatten the bending 38 of diving board 14 or the (see figure 4) that resets, thereby changes the angle θ between piston rod 8 axis and motor 2 axis.Rotation scale 18 is fixed on the adjusting knob 17 by Cock screw 30, when adjusting knob 17 rotations, will rotate synchronously by driven rotary scale 18, circular scale diagraph 42 on rotation scale 18 is corresponding with the straight line diagraph 43 of connecting ring 15, just can read the flow/commentaries on classics (see figure 3) of pump after regulating easily.The diving board 14 of flow regulating part is connected with the rod seal nut 12 of pump head by 3 screws 19.
Driver part: the outer ring 43 and joint bearing block 3 holes 44 of plain radial bearing 4,5 are tightly fixed, and the hole 48 of joint bearing block 3 is connected by the rotating shaft of Cock screw and motor 2 again.Pump head and the driver part joint shaft bearing coupling shaft 6 by pump head interrelates with the plain radial bearing 4,5 of driver part, joint shaft bearing coupling shaft 6 (see figure 4) of can sliding in plain radial bearing 4,5 inner rings.The center in the hole 44 on the joint bearing block 3 and the distance between center line in hole 48 are the A (see figure 4).
In Fig. 5, the piston rod 8 of pump head and piston cavity 9 by ceramic material, have stronger corrosion resistance, abrasiveness.Piston cavity seat 10 can be made by metallic material or macromolecular material.Rod seal nut 12 in Fig. 4 is made by macromolecular material.The copper ring 16 of flow regulating part is by copper alloy made, when clockwise (see figure 2) is rotated adjusting knob 17, rod seal nut 12 will produce friction with copper ring 16 under the effect of diving board 14 elastic force, and the friction factor of these two kinds of storerooms is lower, can make the rotation of adjusting knob 17 more easy and convenient like this.
In Fig. 4, when 2 rotations of motor, will drive the joint bearing block 3 that is connected on 2 in the motor rotates, joint bearing block 3 rotates drivening piece 6,7,8 simultaneously, when there was certain angle 0 in the axis of the axis of piston rod 8 and motor 2, piston rod 8 was also can moving axially along piston cavity 9 in self axis rotation.In Fig. 6, the termination of piston rod 8 has been designed a plane breach 45.During beginning, the parallel axes (see figure 5) of plane breach 45 and liquid entering hole 31 and liquid outlet 33, when piston rod 8 rotates to plane breach 45 with liquid entering hole 31 connections, this moment, piston rod 8 moved certain distance to the axis of outer piston cavity 9, in piston cavity 9, will produce negative pressure, liquid will be pressed in the piston cavity 9 by atmosphere like this, piston rod 8 continues rotation, liquid continues to enter in the piston cavity 9, when piston rod 8 has rotated 180 when spending from the initial position, when after this piston rod 8 continues rotation, 8 beginnings of piston rod are oppositely inwardly moved along the axis of piston cavity 9, when piston rod 8 rotates to plane breach 45 with liquid outlet 33 connections (plane breach 45 is closed with liquor inlet 31 simultaneously), liquid will flow out from liquid outlet, rotate to the plane breach and liquid outlet is closed fully up to piston rod, piston rod 8 has rotated 360 degree simultaneously, and liquid is discharged from liquid outlet 33 fully.Whole process does not have the control of valve, has completed successfully the conveying of liquid fully by the motion of the piston rod 8 of pump own, and accurately and reliably.
The liquid-feeding pump revolution is carried the how much relevant with angle θ, distance A among Fig. 4 of amount of liquid.In the utility model, stroke S and θ, the A of piston rod 8 in piston cavity 9 has following relation:
S=2Asin θ (formula 1)
Can reach the amount that the pump revolution is carried liquid of regulating by changing A or θ value, for the range of pump mainly by the external diameter decision of A, θ value and piston rod 8, for online adjusting mainly by changing the adjusting that the θ value realizes the amount of revolution conveying liquid.In Fig. 4, when adjusting knob 17 turns clockwise, the screw-thread fit length of adjusting knob and connecting ring increases, adjusting knob 17 will be by copper ring 16 pushing diving boards 14, the bending 38 of diving board 14 is flattened, thereby changed the θ value, when adjusting knob 17 is rotated counterclockwise, the screw-thread fit length of adjusting knob and connecting ring reduces, adjusting knob 17 and copper ring 16 will leave diving board 14, and diving board 14 can recover the bending state gradually by the elastic force of inside, thereby has oppositely changed the θ value, has just reached by rotation adjusting knob 17 like this and has regulated the purpose that the pump revolution is carried amount of liquid.Piston cavity seat 10, special design has two ring 46,47 (see figure 4)s around piston cavity seat 10 cylindrical outer wall at liquid gateway place, the disengaging of adjusting knob 17 and connecting ring 15 when ring 46 can prevent that adjusting knob 17 is rotated counterclockwise.
In Fig. 5, on the piston cavity 9 of pump head and piston cavity seat 10,48,49 and rinse liquid outlets 50,51 in a filter washing water inlet (cleaning solution can be water or other liquid) are arranged respectively, utilize other liquid pump to beat liquid and can carry out online in good time cleaning piston cavity 9 and piston rod 8, to guarantee the long-term stability in use and the reliability of pump, made things convenient for maintenance to pump.
In Fig. 4, by the other end optoelectronic switch baffle plate 24 is installed at motor shaft, on motor 2 bodies, installed and fixed optoelectronic switch cover 26, optoelectronic switch cover 26 optoelectronic switches 25 that installed and fixed on duty.By the feedback of optoelectronic switch 25, can guarantee the sense of rotation and the control rotating speed of motor of motor, with the change rotational speed, thereby can increase or reduce liquid outlet pressure.
The utility model can be realized trace conveying liquid, and pump head is corrosion-resistant, is particularly suitable for liquid feeding required precision height, the few and online liquid feeding at regular time and quantity field of liquid feeding.

Claims (8)

1, a kind of accurate adjustable liquid-feeding pump is characterized in that: comprising: pump head, adjusting parts and driver part, wherein,
Described pump head comprises: piston rod, piston cavity, the piston rod attachment cap, the rod seal nut, joint shaft bearing coupling shaft and piston cavity seat, described piston rod is positioned at described piston cavity, and be slidingly connected with described piston cavity, described piston cavity is fixedlyed connected with described piston cavity seat, all have two holes on described piston cavity and the piston cavity seat symmetrically, the central lines in the hole on hole on the described piston cavity and the described piston cavity seat, one of them hole is inlet, another is outlet, one end of described piston rod has a plane breach, the other end of described piston rod is fixedlyed connected with described piston rod attachment cap, described rod seal nut is fixedlyed connected with described piston cavity seat, one end of described joint shaft bearing coupling shaft is fixedlyed connected with described piston rod attachment cap, the other end of described joint shaft coupling shaft and described driver part are connected, drive described piston rod simultaneously along the axis to-and-fro motion of described piston cavity with along the axis rotation of described piston rod by described driver part by described joint shaft coupling shaft and piston rod attachment cap, when the plane breach on the described piston rod move to described piston cavity on inlet when connecting, liquid flows into from described inlet, when the plane breach on the described piston rod move to described piston cavity on outlet when connecting, liquid flows out from described outlet, described adjusting parts are used for regulating by the reciprocating stroke that changes described piston rod the flow of described liquid-feeding pump.
2, accurate adjustable liquid-feeding pump as claimed in claim 1, it is characterized in that: described driver part comprises: motor, joint bearing block and plain radial bearing, wherein,
Described joint bearing block is connected by motor shaft and described motor, one end of the described joint shaft bearing coupling shaft in described plain radial bearing and the described pump head is hinged, rotation by described motor drives described joint bearing block rotation, the rotation of described joint bearing block drives described joint shaft bearing coupling shaft slip and rotates, when between the axis of the axis of described piston rod and motor shaft when angled, the slip of described joint shaft bearing coupling shaft and rotating drives described piston rod simultaneously along the axis to-and-fro motion of described piston cavity with along the axis rotation of described piston rod.
3, accurate adjustable liquid-feeding pump as claimed in claim 1, it is characterized in that: described adjusting parts comprise: diving board, connecting ring, copper ring, adjusting knob and rotation scale, wherein,
Described diving board is a bending-like, one end of bending is connected by screw fit with the rod seal nut of described pump head, the other end of bending is connected by screw fit with described connecting ring, described connecting ring is fixed on the electric machine support, described adjusting knob is connected by screw-thread fit with described connecting ring, be carved with the circular scale diagraph on the described adjusting knob, be carved with the straight line diagraph on the described connecting ring, described rotation scale is connected by screw fit with described adjusting rotation, when the described adjusting knob of rotation, make described copper ring oppress described diving board and be in different bending states, drive described piston seal nut motion by described diving board, the motion of described piston seal nut drives described piston cavity seat motion, the motion of described piston cavity seat changes the angle between the axis of the axis of described piston rod and described motor shaft, and the change of described angle changes the reciprocating stroke of described piston rod; Described rotation scale and described adjusting knob rotate synchronously, indicate the flow of described liquid-feeding pump by the scale on described rotation scale and the described adjusting knob.
4, accurate adjustable liquid-feeding pump as claimed in claim 1 is characterized in that: described piston rod and described rod end chamber body and function ceramic material.
5, accurate adjustable liquid-feeding pump as claimed in claim 1, it is characterized in that: a liquid inlet and a liquid outlet are arranged respectively on described piston cavity (9) and the piston cavity seat (10), and a filter washing water inlet and a rinse liquid outlet, totally 4 liquid gateways, described piston cavity seat (10) has two rings (46), (47) in its special design in place, liquid gateway around piston cavity seat cylindrical outer wall.
6, accurate adjustable liquid-feeding pump as claimed in claim 1 is characterized in that: described rod seal nut (12) is made by macromolecular material, and rod seal nut (12) has 3 attachment holes, and is fixedly connected by the attachment hole that screw is corresponding with diving board.
7, accurate adjustable liquid-feeding pump as claimed in claim 1, it is characterized in that: described joint bearing block (3) has two rectangular arms, all porosely on each arm cooperate with plain radial bearing outer ring and motor shaft respectively, the axially bored line that is connected with motor shaft is A to the hole centre distance on another arm of joint bearing block.
8, accurate adjustable liquid-feeding pump as claimed in claim 1, it is characterized in that: the angle θ between described piston rod axis and the motor shaft axis, piston rod in piston cavity along the reciprocating stroke S of piston rod axis, distance A, between these three parameters certain relation is arranged, that is: S=2Asin θ.
CNU2008200017430U 2008-01-06 2008-01-06 Accurately adjustable fluid feed pump Expired - Fee Related CN201273254Y (en)

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Application Number Priority Date Filing Date Title
CNU2008200017430U CN201273254Y (en) 2008-01-06 2008-01-06 Accurately adjustable fluid feed pump

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Application Number Priority Date Filing Date Title
CNU2008200017430U CN201273254Y (en) 2008-01-06 2008-01-06 Accurately adjustable fluid feed pump

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102078220A (en) * 2010-12-07 2011-06-01 成都老肯科技股份有限公司 Quantitative liquid adding device for full-automatic medical cleaner and control method thereof
CN103557133A (en) * 2013-11-15 2014-02-05 成都蓉药集团四川长威制药有限公司 Micro liquid metering ceramic pump for drug production
CN106640579A (en) * 2016-12-05 2017-05-10 广州飞升精密设备有限公司 Precise adjustment metering pump
CN112922820A (en) * 2021-03-26 2021-06-08 深圳市恒永达科技有限公司 Valveless plunger pump capable of finely adjusting stroke

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102078220A (en) * 2010-12-07 2011-06-01 成都老肯科技股份有限公司 Quantitative liquid adding device for full-automatic medical cleaner and control method thereof
CN103557133A (en) * 2013-11-15 2014-02-05 成都蓉药集团四川长威制药有限公司 Micro liquid metering ceramic pump for drug production
CN106640579A (en) * 2016-12-05 2017-05-10 广州飞升精密设备有限公司 Precise adjustment metering pump
CN106640579B (en) * 2016-12-05 2018-05-29 广州飞升精密设备有限公司 A kind of accurate adjusting metering pump
CN112922820A (en) * 2021-03-26 2021-06-08 深圳市恒永达科技有限公司 Valveless plunger pump capable of finely adjusting stroke

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C14 Grant of patent or utility model
GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20090715

Termination date: 20100208