CN1565754A - Emulsion pump for highly viscous materials - Google Patents

Abstract

A emulsion pump comprises a cylinder with a one-way valve on the lower part, a piston head, a piston with an inner ring and an outer ring, which composes a up-one-way valve with the piston head, a pressure head fixed on the top of the piston head, and a spring between the lower part of the piston head and the down-one-way valve, in which, flange forms on the edge of the lower end of piston head, the flange comprises an inside first inclined plane, the piston comprises an inclined plane on the outer side of the inner ring lower part, and the first inclined plane of the piston head hermetically communicates with the inclined plane of the piston when the piston head contacts piston; or the flange comprises a second inclined plane on the outer side of top, the piston comprises an inclined plane on the inner side of the outer ring lower part, and the second inclined plane of the piston head hermetically communicates with the inclined plane of the piston when the piston head contacts the piston. Viscous liquid can be discharged from the emulsion pump easily by improving sealing performance of the one-way valve.

Description

High Viscosity Emulsion Pump

Technical field

The present invention relates to the emulsion pump, especially be applicable to the emulsion pump of high sizing liquid and lotion.

Background technology

Be used for being applied to daily life at present such as the viscous feed liquid of hair cream, shower cream etc. and the emulsion pump of lotion just increasingly extensively.This emulsion pump can aspirate out a certain amount of feed liquid with for people to use easily by push action from the feed liquid container.

Fig. 1 schematically shows a widely used on the market conventional emulsion pump structure.This emulsion pump comprises a cylinder 1, wherein be provided with a piston head 2 and a piston 3, the bottom of piston head 2 is to extending out out, form a shoulder, the periphery of shoulder is formed with the inclined-plane of outwards splaying 10, with can with inclined-plane 11 sealing contacts of the inboard, inner ring lower end of piston 3, make piston head 2 and piston 3 constitute check valve on; Its lower end is provided with a pearl 5 and a lower valve base 6, and pearl 5 and lower valve base 6 constitute check valve.The upper end of piston head 2 and a security 7 are permanently connected, be provided with a spring 8 between the lower end of piston head 2 and the following check valve, piston head 2 can utilize security 7 and spring 8 to pump in cylinder 1, produce negative pressure, thereby from feed liquid container (not shown), draw feed liquid by a suction pipe that is connected on cylinder 1 lower end.

Figure 1 shows that the quiescence (state security 7 reset after) of emulsion pump when not using, at this moment, push security 7 downwards, piston head 2 moves down under the effect of security 7, piston 3 is owing to separate with the piston head 2 that moves down with the friction force of cylinder 1 inwall, thereby opens check valve.At this moment, following closed check valve, the feed liquid between the check valve is just discharged from the jet hole 9 of security 7 up and down.When the user presses to bottom dead point with security 7 and unclamps, the elastic force that is pressed on the spring 8 on piston head 2 lower ends makes piston head 2 and security 7 up to reset, piston 3 is up with piston head 6, because the friction force of piston 7 and cylinder 3, piston 3 is urged on piston head 2, and forms the compressing sealing between the inclined-plane 11 of the inclined-plane 10 of the inboard, inner ring lower end of piston 3 and piston head 2 bottom shoulder peripheral regions.At this moment, form negative pressure up and down between the check valve, pearl 5 is up to leave lower valve base 6, thereby opens down check valve, drawing feed liquid by suction pipe 6 from the feed liquid container, uses for pressing operation next time.

But traditional emulsion pump is prone to the not situation of fluid, especially under the situation of the feed liquid of using some special thickness and lotion.The fluid major cause is not to go up check valve can not seal fully easily, thereby leaks, and the degree of vacuum about making between the check valve is lower, can't be filled feed liquid, and residual have a more air.According to traditional design, as Fig. 1 with traditionally shown in the enlarged view 2 of check valve, the inclined-plane 10 of the inboard, inner ring lower end of piston 3 is positioned at the outside on the inclined-plane 11 of piston head 2 bottom shoulder peripheral regions, and both tiltedly offset by equal lean-out.Like this, when security 7 is up from bottom dead point, when piston head 2 impinges upon on the piston packing face, impact can be decomposed into the outside tension force of a horizontal direction, make the inner ring of piston 3 be subjected to outside tension force, but, owing to can not center injection moulding there be " weld junction " in piston,, thereby cause check valve can't seal fully so such bump tension force is torn " weld junction " easily.And, after the emulsion pump is enabled, people did not push in most times of getting liquid, security can be in top dead point, and at this moment, spring 8 compressing piston heads 2 upwards, piston head 2 can be pressed on the sealing inclined-plane of piston too, produce the outside component of a horizontal direction, and this power is long-time, continual, so " weld junction " torn.In addition, tear in order to prevent " weld junction " as far as possible, the seal ring of piston 3 just can not be done thinlyyer, and the angle of inclination on inclined-plane can not be less, so bigger seal area can't be provided.And the seal ring of piston 3 does thickly more, and its flexibility is also poor more, so also poor more to the comformability of the aspect defectives such as right alignment after the part circularity of piston head 2, piston head 3 and cylinder 1 etc., concentricity, the assembling.These reasons all make check valve can not obtain good sealing effectiveness, thereby and cause emulsion pump not fluid or fluid difficulty.

Also there is a problem in traditional emulsion pump, promptly when using heavy body feed liquid (for example, during greater than 4000CPS), also the difficulty that resets can occur.At this moment because the resistance that viscous feed liquid climbs is bigger,, just need higher degree of vacuum and bigger spring force in suction pipe in suction pipe 6 if feed liquid is successfully climbed.If but strengthen spring force, and the feel of pump is increased the weight of, and the seal ring of piston is stressed bigger, easilier ftracture at the weld junction place.Under the certain situation of spring force, just require the friction force between piston 3 and the cylinder 1 as far as possible little, but the little piston 3 that can make again of friction force is bad with piston head 2 sealings, because from top narration as can be seen, friction force between piston 3 and cylinder 1 inwall provides the compressing between the inclined-plane 11 of the inclined-plane 10 of inboard, inner ring lower end of piston 3 and piston head 2 bottom shoulder peripheral regions to seal needed pressure just, so friction force is more little, sealing load is also more little, and sealing effectiveness is also poor more.So the emulsion pump piston of traditional design can be not too soft, the magnitude of interference can be too not little, and this has just caused the design of conventional emulsion pump in the sucking-off of viscous feed liquid with the contradiction between resetting.

Summary of the invention

The present invention designs in view of existing problem in the emulsion pump of above-mentioned prior art just.

Target of the present invention provides a kind of emulsion pump of fluid performance improvement.

The purpose of this invention is to provide a kind of emulsion pump that the check valve sealing property is improved of going up.

The objective of the invention is to be achieved through the following technical solutions, provide a kind of emulsion pump, it comprises: a cylinder, its lower end are provided with the check valve of upwardly-openable; One piston head, its bottom form a shoulder to extending out out; One piston, it has an inner ring and an outer ring, and constitutes check valve on piston head; One security is fixedly connected on the upper end of piston head; And a spring, it between piston head lower end and following check valve, can be with the security synergy so that piston head can be in cylinder crank motion; Wherein, the peripheral region of the bottom shoulder of piston head forms a bead, and the bead of piston head is provided with one first inclined-plane in the inboard, and piston is provided with the inclined-plane in the outside, inner ring lower end, when piston head contacts with piston, first inclined-plane of piston head and the inclined-plane sealing contact of piston; Perhaps, the bead of piston head is provided with one second inclined-plane in top outer, and piston is provided with on an inclined-plane of inboard, lower end, outer ring, when piston head contacts with piston, and second inclined-plane of piston head and the inclined-plane sealing contact of piston.

In above-mentioned emulsion pump, the bead of piston head can be provided with one first inclined-plane simultaneously and in top outer one second inclined-plane is set in the inboard, piston can be provided with an inclined-plane on arranged outside one inclined-plane, inner ring lower end and in inboard, lower end, outer ring simultaneously, when piston head contacts with piston, the inclined-plane sealing contact in first inclined-plane of piston head and the outside, piston inner ring lower end, the inclined-plane sealing contact of second inclined-plane of piston head and inboard, lower end, piston outer ring.

Because piston head and the such inclined design of piston, under the state of last closed check valve, the piston inclined-plane is subjected to piston head inclined-plane or the cylinder inside wall inside constrained force to it, rather than outside tension force, so needn't worry the weld junction cracking of piston, event can be done the seal ring of piston thinner, the angle on inclined-plane is done lessly, like this, not only increased seal area, and the contact place, inclined-plane flexibility also improve, can adapt to the adverse effect that causes because of circularity, concentricity, right alignment better.So the sealing property of last check valve has obtained tangible improvement, even under the situation of the feed liquid of using special thickness, the emulsion pump also is easy to fluid.And the improvement of sealing property makes and need not bigger spring force in the emulsion pump and just can provide bigger degree of vacuum, helps the sucking-off of heavy body feed liquid, and it is light to push feel.

In addition, its manufacturing of emulsion pump of the present invention and the method for assembling are basic identical with the emulsion pump of prior art, can utilize traditional manufacturing equipment to make fully, so also the emulsion pump with prior art is suitable for manufacturing cost.

The accompanying drawing summary

Hereinafter with reference to the accompanying drawings concrete description is carried out in preferred embodiment of the present invention, in these accompanying drawings:

Fig. 1 is a conventional emulsion pump structure scheme drawing, and wherein semi-sictional view goes out the structure of cylinder interior;

Fig. 2 is the enlarged view of the last check valve of conventional emulsion pump shown in Figure 1;

Fig. 3 is that wherein semi-sictional view goes out the structure of cylinder interior according to emulsion pump structure scheme drawing of the present invention;

Fig. 4 is the enlarged view according to an embodiment of check valve on the emulsion pump of the present invention;

Fig. 5 is the enlarged view according to another embodiment of check valve on the emulsion pump of the present invention; And,

Fig. 6 is the enlarged view of an embodiment again according to check valve on the emulsion pump of the present invention;

The specific embodiment

Fig. 3 schematically shows according to an emulsion pump structure of the present invention, and except the structure of last check valve, its basic structure is identical with conventional emulsion pump configuration shown in Figure 1.

The view that check valve amplifies from emulsion pump shown in Figure 4 as seen, the piston head of present embodiment is with Seal Design and the different of traditional design between the piston, the periphery of piston head 12 bottom shoulders is formed with a bead 13, bead 13 inboard formation one are bevelled first inclined-plane 16 to the inside, the piston 14 inner ring lower ends outsides forms an intilted inclined-plane 15, and the inclined-plane 16 of piston head 12 is offseted with 15 outsides, inclined-plane of piston 14 contact.Therefore, when pressing to after bottom center with security 7, the user unclamps, piston head 12 and security 7 horizontal reset under the elastic force effect of spring 8, and when making piston 14 press against on the piston head 12, the power that acts on the sealing inclined-plane 15 of piston inwardly makes progress, that is, its horizontal component of force is inside binding force, rather than original outside tension force, so the weld junction of piston inner ring can not ftracture.Thereby can the piston inner ring be done thinly as far as possible, the angle of inclination, inclined-plane is done little, thereby increases seal area, improves sealing effectiveness.Simultaneously, because the piston inner ring is done thinly,, be easier to adapt to the defective that influences sealing effectiveness that factors such as circularity, concentricity, right alignment are brought so its flexibility is also improved.

Piston and piston head can also design as illustrated in fig. 5.In the embodiment shown in fig. 5, not only bead 18 inboards of piston head 17 bottoms are provided with one first inclined-plane 16, contact offseting with the intilted inclined-plane 15 in the outside, piston inner ring lower end, and bead 18 top outer of piston head 17 also are provided with one second inclined-plane 21, offseting hermetically with the inclined-plane 20 of the inboard, outer ring of piston.Stressed and the working condition on first inclined-plane 15 of the piston head 17 in the present embodiment is similar to first inclined-plane 15 of first embodiment, has good seal performance and other advantage too.The characteristics of present embodiment are also to be provided with one second inclined-plane 21.Although the inclined-plane, outer ring 20 of the 21 pairs of pistons 19 in second inclined-plane of piston head 17 applies an outside tension force, but because the outer ring of piston 19 itself has been resisted against on the inwall of cylinder 1, so be subjected to the constraint of cylinder 1 inwall, the outer ring of piston 19 can't outwards be expanded again, and the weld junction of outer ring just can not torn.Moreover, the tension force that second inclined-plane 21 of piston head 17 is applied is also all as sealing load, further improved the sealing effectiveness between the inwall of piston head 17 and piston 19 and piston 19 and cylinder 1.

The above embodiments and accompanying drawing only are one exemplary embodiment of the present invention, at cylinder, piston, the first-class detail design of piston can be according to concrete demand change.Within the scope of the invention, can also make various modifications and modification to the above embodiments, for example, as shown in Figure 6, when only having a sealed outer ring, extends downwards with the time in piston 24 with the piston head sealing contact, the bead 23 of the bottom of piston head 22 can only be provided with second inclined-plane 21 that is positioned at the top outside, and this inclined-plane 21 can offset hermetically with the inclined-plane 20 of inboard, piston outer ring.Owing to be subjected to the constraint of the inwall of cylinder 1,, can obtain good sealing effectiveness equally so the weld junction of piston 24 outer rings can not torn.All modifications and modification all fall within the protection domain of qualification of appended claims.

Claims (2)

1. emulsion pump, it comprises:

One cylinder (1), its lower end are provided with the check valve of upwardly-openable;

One piston head (12,17,22), its bottom forms a shoulder to extending out out;

One piston (14,19,24), it has an inner ring and an outer ring, and constitutes check valve on piston head;

One security (7) is fixedly connected on the upper end of piston head; And

One spring (8), it between piston head lower end and following check valve, can be with security synergy so that piston head can be in cylinder crank motion;

It is characterized in that piston head (12,17, the peripheral region of bottom shoulder 22) forms a bead (13,18,21), the described bead (13 of piston head (12,17), 18) be provided with one first inclined-plane (16) in the inboard, piston (14,19) is provided with the inclined-plane (15) in the outside, inner ring lower end, when piston head (12, during 17) with piston (14,19) contact, described inclined-plane (15) sealing contact of described first inclined-plane (16) of piston head and piston; Perhaps, piston head (17,22) described bead (18,21) be provided with one second inclined-plane (21) in top outer, piston (19,24) is provided with the inclined-plane (20) in inboard, lower end, outer ring, when piston head (17, during 22) with piston (19,24) contact, described inclined-plane (20) sealing contact of described second inclined-plane (21) of piston head and piston.

2. emulsion pump as claimed in claim 1, it is characterized in that, the described bead (18) of piston head (17) is provided with on one first inclined-plane (16) of inboard with on one second inclined-plane (21) of top outer, piston (14,19) be provided with on the inclined-plane (15) in the inner ring lower end outside with on the inclined-plane (20) of inboard, lower end, outer ring, when piston head (17) and piston (19) when contacting, described inclined-plane (15) sealing contact of described first inclined-plane (16) of piston head and piston, described inclined-plane (20) sealing contact of described second inclined-plane (21) of piston head and piston.

Images