CN203892180U - External force enhanced one-way valve plunger metering pump - Google Patents

External force enhanced one-way valve plunger metering pump Download PDF

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Publication number
CN203892180U
CN203892180U CN201420313716.2U CN201420313716U CN203892180U CN 203892180 U CN203892180 U CN 203892180U CN 201420313716 U CN201420313716 U CN 201420313716U CN 203892180 U CN203892180 U CN 203892180U
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China
Prior art keywords
way valve
metering pump
plunger metering
external force
cylinder
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Application number
CN201420313716.2U
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Chinese (zh)
Inventor
黄锦成
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Foshan City You Ba Machinery Co Ltd
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Foshan City You Ba Machinery Co Ltd
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Abstract

The utility model discloses an external force enhanced one-way valve plunger metering pump. The external force enhanced one-way valve plunger metering pump comprises a plunger metering pump body which is provided with an input one-way valve and an output one-way valve. Each one-way valve is provided with a driving device which is set to eject a one-way valve element to be in a closed state when the one-way valve needs to be closed. By means of the design, the performance of the external force enhanced one-way valve plunger metering pump can be greatly improved on the premise that the structure of a one-way valve metering pump is retained, the defect that the one-way valves are not sealed firmly on some occasions is overcome, and the metering liquid infusion precision, stability and reliability of the pump are guaranteed.

Description

External force enhancement one-way valve plunger metering pump
Technical field
The utility model 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 the liquid with particle.Conventionally one-way valve structures is by adopting conical valve seat, spool and spring composition, 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 factors such as pressure, the physical property of liquid 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.
Model utility content
The technical problems to be solved in the utility model 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.Ensure 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 aspect 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 arranges a drive unit, this drive unit is set as and in the time that 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 in the time that 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 in the time that piston rod stretches out, control double air controlled four-way valve by pressure communication hole output pressure signal and move, then by double air controlled four-way valve control plunger metering pump.Or described plunger metering pump adopts motorized motions, the controller control motor driving plunger motion of pump, moves by the cylinder of two one-way valves of electromagnetic valve with the program of Time Controller, the interlock of realization order.
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 model utility 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, ensured metering fluid injection precision, stability and the reliability of pump.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model external force enhancement one-way valve plunger metering pump.
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 arranges a drive unit, and this drive unit is set as and in the time that 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 in the time that 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 condition.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, no longer describes in detail at this.
For the ease of the manipulation 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 in the time that 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 in the time of sucking pump alternately.If be the plunger metering pump that adopts motorized motions, need employing program to control the coordination of each step action.
Set forth working principle of the present utility model as an example of pneumatic plunger metering pump example: start cylinder 5, shifter cylinder 4 simultaneously, 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, shifter cylinder 5 simultaneously, 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 utility model 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, ensures 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, ensures 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 arranges a drive unit, this drive unit is set as and in the time that 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 in the time that 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 in the time that 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.
CN201420313716.2U 2014-06-12 2014-06-12 External force enhanced one-way valve plunger metering pump Active CN203892180U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420313716.2U CN203892180U (en) 2014-06-12 2014-06-12 External force enhanced one-way valve plunger metering pump

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420313716.2U CN203892180U (en) 2014-06-12 2014-06-12 External force enhanced one-way valve plunger metering pump

Publications (1)

Publication Number Publication Date
CN203892180U true CN203892180U (en) 2014-10-22

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CN201420313716.2U Active CN203892180U (en) 2014-06-12 2014-06-12 External force enhanced one-way valve plunger metering pump

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103994065A (en) * 2014-06-12 2014-08-20 佛山市优霸机械设备有限公司 One-way valve plunger metering pump enhanced through external force

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103994065A (en) * 2014-06-12 2014-08-20 佛山市优霸机械设备有限公司 One-way valve plunger metering pump enhanced through external force

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