CN103994065A - One-way valve plunger metering pump enhanced through external force - Google Patents
One-way valve plunger metering pump enhanced through external force Download PDFInfo
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- CN103994065A CN103994065A CN201410261756.1A CN201410261756A CN103994065A CN 103994065 A CN103994065 A CN 103994065A CN 201410261756 A CN201410261756 A CN 201410261756A CN 103994065 A CN103994065 A CN 103994065A
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- way valve
- metering pump
- plunger metering
- external force
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Abstract
The invention discloses a one-way valve plunger metering pump enhanced through external force. The one-way valve plunger metering pump enhanced through external force comprises a plunger metering pump body. The plunger metering pump body is provided with an input one-way valve and an output-way valve, and each one-way valve is provided with a driving device. According to the design, each driving device jacks an element of the corresponding one-way valve to keep the one-way valve in the closed state when the one-way valve needs to be closed. According to the one-way valve plunger metering pump enhanced through external force, due to the design, on the premise that the structure of the one-way valve metering pump is kept, the performance of the pump is greatly improved, the defect that sealing of the one-way valves of the one-way valve pump is not tight on some application occasions is overcome, and the precision of metered liquid feeding, the stability and the reliability of the pump are guaranteed.
Description
Technical field
The present invention relates to one-way valve plunger type metering pump technical field.
Background technique
It is a kind of metering pump being in daily use that plunger metering pump is joined input output one-way valve.Due to the accurate-metering of ram type pump, add the close synchronously opening function of input output one-way valve, the precision of common this pump is higher.This pump is suitable for middle low viscosity, not with the liquid of particle.Conventionally one-way valve structures is that spool and spring form by adopting conical valve seat, and poppet shaft is to being slidably mounted in valve seat.
The one-way sealing effect of one-way valve depends on following factor: the smooth and easy situation of the shape of spring force, conical valve seat and degree of finish, liquid fluid, the pressure of liquid, the factors such as physical property of liquid.Conventionally in order to allow fluid pressure smooth opening one-way valve, spring force can not be too large.Because spring force is limited, the sealing effect of one-way valve is also limited.If liquid contains microparticle or has under the factors such as crystal is separated out, fluid viscosity is large, liquid flow velocity is large, the sealing condition of one-way valve is just undesirable, thereby affects the measuring accuracy of metering pump.For the sealability of liftout plunger pump, the liquid that existing threeway rotary valve shape plunger pump can effectively adapt to the high liquid of viscosity, contain particle-liquid or have crystal to separate out.But rotary valve shape plunger pump, structure is more complicated, and the required precision of rotary valve is high, and actual application can stick situation about can not rotate because rotary valve appears in liquid crystalization.
Summary of the invention
The technical problem to be solved in the present invention is, opens under the prerequisite of one-way valve not affecting fluid pressure, and a kind of extra pressure is provided, and increases the sealing impacting force between poppe tvalve core liquid one-way valve seat, thereby promotes the sealability of one-way valve.Guaranteed the precision and stability of metering, fluid injection.Also can solve one-way valve pump in viscosity high liquid, containing microparticle liquid and the easily application of the aspects such as liquid of crystallization simultaneously.
For solving the problems of the technologies described above adopted technological scheme: a kind of external force enhancement one-way valve plunger metering pump, include plunger metering pump, plunger metering pump has input one-way valve and output one-way valve, it is characterized in that: each one-way valve all sets a drive unit, this drive unit is set as and when one-way valve need to be closed, heads on nonreturn valve core maintenance closed condition.
On the basis of the above, described drive unit is cylinder, and cylinder is set as when one-way valve need to be closed its piston rod and stretches out and head on nonreturn valve core and keep closed condition.
On the basis of the above, described plunger metering pump adopts pneumatic drive, the casing wall of described cylinder is provided with the pressure communication hole that is only communicated with cylinder atmospheric pressure cavity when piston rod stretches out, by pressure communication hole output pressure signal, control double air controlled four-way valve and move, then control plunger metering pump by double air controlled four-way valve.Or described plunger metering pump adopts motorized motions, the controller of pump is controlled motor driving plunger motion, and the cylinder with the program of Time Controller by two one-way valves of electromagnetic valve moves, and realization sequentially links.
The main points of order interlock are: defeat outside while tightly closing input one-way valve, output one-way valve is not subject to cylinder External Force Acting, and plunger metering pump pumps liquid by output one-way valve; Defeat outside while tightly closing output one-way valve, input one-way valve is not subject to cylinder External Force Acting, and plunger metering pump sucks liquid by input one-way valve.
The beneficial effect that adopts invention to bring: the external force enhancement one-way valve plunger metering pump that adopts this design, can retain under the prerequisite of one-way valve metering pump structure, pump performance is promoted greatly, overcome one-way valve pump not tight situation of unidirectional valve seal under some applications, guaranteed metering fluid injection precision, stability and the reliability of pump.
Accompanying drawing explanation
Fig. 1 is the structural representation of external force enhancement one-way valve plunger metering pump of the present invention.
Embodiment
As shown in Figure 1, a kind of external force enhancement one-way valve plunger metering pump, include plunger metering pump 1, plunger metering pump 1 has input one-way valve 2 and output one-way valve 3, each one-way valve 2,3 all sets a drive unit, and this drive unit is set as and when one-way valve 2,3 need to be closed, heads on nonreturn valve core maintenance closed condition.Described drive unit is cylinder 4,5, and cylinder 4,5 is set as when one-way valve 2,3 need to be closed its piston rod 6,7 and stretches out and head on respectively input nonreturn valve core 8 and output one-way valve 9 keeps closed conditions.Concrete, cylinder 4,5 is separately fixed at the direction end of the flow of fluid of input one-way valve 2 and output one-way valve 3, and both piston rods 6,7 stretch into respectively in the valve pocket of input one-way valve 2 and output one-way valve 3.After cylinder 4,5 starts, both piston rods 6,7 stretch out, and head on respectively input nonreturn valve core 8 and output one-way valve core 9 and are pressed on valve seat separately, make to input one-way valve 2 and output one-way valve 3 is closed.Between piston rod 6,7 and valve body, seal ring is installed, to guarantee the sealing of valve body.Certainly, drive unit also can adopt other conventional power plant, such as the flexible mechanism of Electromagnetic Drive, at this, no longer describes in detail.
For the ease of controlling of plunger metering pump, for the plunger metering pump that adopts pneumatic drive, on the casing wall of described cylinder 4,5, be equipped with and only when its piston rod 6,7 stretches out, be communicated with the pressure communication hole 10,11 of atmospheric pressure cavity separately, concrete, the piston that pressure communication hole 10,11 can be opened in atmospheric pressure cavity stretches out the end of stroke, utilize the two-way air pressure signal of pressure communication hole 10,11 outputs, by double air controlled solenoid operated four-way valve, alternately start cylinder 4,5, just can control plunger metering pump the moving back and forth of plunger when sucking pump alternately.If be the plunger metering pump that adopts motorized motions, need employing program to control the coordination of each step action.
The pneumatic plunger metering pump of take is set forth working principle of the present invention as example: start cylinder 5, while shifter cylinder 4, the piston rod 7 of cylinder 5 stretches out, and output one-way valve core 9 is pressed on valve seat, and output one-way valve 3 is closed, now, the piston of cylinder 5 is crossed pressure communication hole 11, and pressure communication hole 11 is communicated with atmospheric pressure cavity, output pressure signal, start the action of double air controlled solenoid operated four-way valve, make plunger metering pump imbibition, start cylinder 4, while shifter cylinder 5, the piston rod 6 of cylinder 4 stretches out, input nonreturn valve core 8 is pressed on valve seat, making to input one-way valve 2 closes, now, the piston of cylinder 4 is crossed pressure communication hole 10, pressure communication hole 10 is communicated with atmospheric pressure cavity, output pressure signal, the action of reverse starting double air controlled solenoid operated four-way valve, make plunger metering pump pump liquid, closing of cylinder 5 disappears the active force that compresses output one-way valve core 9, liquid fails to be convened for lack of a quorum and promotes output one-way valve core 9 and retreat, and head on piston rod 7 and retreat reset, output one-way valve 3 is opened, plunger metering pump can outwards pump liquid.
Plunger pump of the present invention is in the process of pump liquid, and input nonreturn valve core 8 is pressed by the piston rod 6 of cylinder 4, and valve seat is sealed completely, guarantees that the amount of liquid 100% of plunger stroke pumps output channel by output one-way valve 3; Plunger pump is in the process of imbibition, and output one-way valve core 9 is pressed by the piston rod 7 of cylinder 5, and valve seat is sealed completely, guarantees that the amount of liquid 100% of plunger stroke is by input one-way valve 2 inspiration pump thoraxes.
Claims (4)
1. an external force enhancement one-way valve plunger metering pump, include plunger metering pump, plunger metering pump has input one-way valve and output one-way valve, it is characterized in that: each one-way valve all sets a drive unit, this drive unit is set as and when one-way valve need to be closed, heads on nonreturn valve core maintenance closed condition.
2. external force enhancement one-way valve plunger metering pump according to claim 1, is characterized in that: described drive unit is cylinder, and cylinder is set as when one-way valve need to be closed its piston rod and stretches out and head on nonreturn valve core and keep closed condition.
3. external force enhancement one-way valve plunger metering pump according to claim 2, is characterized in that: described plunger metering pump adopts pneumatic drive, and the casing wall of described cylinder is provided with the pressure communication hole that is only communicated with cylinder atmospheric pressure cavity when piston rod stretches out.
4. external force enhancement one-way valve plunger metering pump according to claim 1, is characterized in that: described plunger metering pump adopts motorized motions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410261756.1A CN103994065A (en) | 2014-06-12 | 2014-06-12 | One-way valve plunger metering pump enhanced through external force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410261756.1A CN103994065A (en) | 2014-06-12 | 2014-06-12 | One-way valve plunger metering pump enhanced through external force |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103994065A true CN103994065A (en) | 2014-08-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410261756.1A Pending CN103994065A (en) | 2014-06-12 | 2014-06-12 | One-way valve plunger metering pump enhanced through external force |
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| CN (1) | CN103994065A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112460013A (en) * | 2019-09-06 | 2021-03-09 | 中石化石油工程技术服务有限公司 | Hydraulic plunger pump and hydraulic end thereof |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5917273B2 (en) * | 1979-09-17 | 1984-04-20 | 豊 山田 | quick-closing check valve |
| CN101245770A (en) * | 2007-02-17 | 2008-08-20 | 卓越剂量技术有限公司 | Electromotor driven metering pump |
| CN201377402Y (en) * | 2009-04-13 | 2010-01-06 | 成都经纬机械制造有限公司 | Rotary valve piston-type pneumatic stroke pump |
| CN201723437U (en) * | 2010-06-01 | 2011-01-26 | 黑旋风工程机械开发有限公司 | Forced suction and discharge valve for reciprocating pump |
| CN103161707A (en) * | 2011-12-19 | 2013-06-19 | 袁平 | Pneumatic plunger metering pump |
| CN203892180U (en) * | 2014-06-12 | 2014-10-22 | 佛山市优霸机械设备有限公司 | External force enhanced one-way valve plunger metering pump |
-
2014
- 2014-06-12 CN CN201410261756.1A patent/CN103994065A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5917273B2 (en) * | 1979-09-17 | 1984-04-20 | 豊 山田 | quick-closing check valve |
| CN101245770A (en) * | 2007-02-17 | 2008-08-20 | 卓越剂量技术有限公司 | Electromotor driven metering pump |
| CN201377402Y (en) * | 2009-04-13 | 2010-01-06 | 成都经纬机械制造有限公司 | Rotary valve piston-type pneumatic stroke pump |
| CN201723437U (en) * | 2010-06-01 | 2011-01-26 | 黑旋风工程机械开发有限公司 | Forced suction and discharge valve for reciprocating pump |
| CN103161707A (en) * | 2011-12-19 | 2013-06-19 | 袁平 | Pneumatic plunger metering pump |
| CN203892180U (en) * | 2014-06-12 | 2014-10-22 | 佛山市优霸机械设备有限公司 | External force enhanced one-way valve plunger metering pump |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112460013A (en) * | 2019-09-06 | 2021-03-09 | 中石化石油工程技术服务有限公司 | Hydraulic plunger pump and hydraulic end thereof |
| CN112460013B (en) * | 2019-09-06 | 2023-04-18 | 中石化石油工程技术服务有限公司 | Hydraulic plunger pump and hydraulic end thereof |
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Application publication date: 20140820 |
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