CN217049760U - Emulsion pump capable of better preventing liquid from flowing back - Google Patents

Emulsion pump capable of better preventing liquid from flowing back Download PDF

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Publication number
CN217049760U
CN217049760U CN202220942000.3U CN202220942000U CN217049760U CN 217049760 U CN217049760 U CN 217049760U CN 202220942000 U CN202220942000 U CN 202220942000U CN 217049760 U CN217049760 U CN 217049760U
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CN
China
Prior art keywords
pump body
side wall
central circular
liquid inlet
truncated cone
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Active
Application number
CN202220942000.3U
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Chinese (zh)
Inventor
吴婉媚
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Guangdong Zhongkai Plastic Industry Co ltd
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Guangdong Zhongkai Plastic Industry Co ltd
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Priority to CN202220942000.3U priority Critical patent/CN217049760U/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • B05B11/1066—Pump inlet valves
    • B05B11/1067—Pump inlet valves actuated by pressure
    • B05B11/1069—Pump inlet valves actuated by pressure the valve being made of a resiliently deformable material or being urged in a closed position by a spring
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • B05B11/1043—Sealing or attachment arrangements between pump and container
    • B05B11/1046—Sealing or attachment arrangements between pump and container the pump chamber being arranged substantially coaxially to the neck of the container
    • B05B11/1047—Sealing or attachment arrangements between pump and container the pump chamber being arranged substantially coaxially to the neck of the container the pump being preassembled as an independent unit before being mounted on the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1042—Components or details
    • B05B11/1073—Springs
    • B05B11/1074—Springs located outside pump chambers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
    • B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
    • B05B11/00—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use
    • B05B11/01—Single-unit hand-held apparatus in which flow of contents is produced by the muscular force of the operator at the moment of use characterised by the means producing the flow
    • B05B11/10—Pump arrangements for transferring the contents from the container to a pump chamber by a sucking effect and forcing the contents out through the dispensing nozzle
    • B05B11/1001—Piston pumps
    • B05B11/1023—Piston pumps having an outlet valve opened by deformation or displacement of the piston relative to its actuating stem

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  • Reciprocating Pumps (AREA)

Abstract

The utility model relates to an emulsion pump which can better prevent liquid from flowing back, comprising a press head, a lock cover, a pump body, an outer cover and a main column component; the main column assembly comprises a main column, a piston, an auxiliary column and a compression spring, a liquid inlet is formed in the bottom of the pump body, a backflow valve is arranged at the liquid inlet and comprises an outer ring, a central circular table and at least two connecting strips, the outer ring is positioned on the outer side of the central circular table, the inner side wall of the outer ring is connected with the outer side wall of the central circular table through each connecting strip, and a plurality of liquid inlet gaps are formed between the outer ring and the central circular table by separating the connecting strips; the bottom of the pump body is provided with a valve seat, the valve seat is positioned above the liquid inlet, the liquid inlet is communicated with the inner cavity of the pump body through a liquid inlet gap, the bottom surface of the central circular truncated cone is in close contact with the valve seat, the outer side wall of the outer ring is in close contact with the inner side wall of the pump body, and the bottom of the auxiliary column is in contact fit with the top surface of the central circular truncated cone. The utility model discloses an increase the sealing performance between the pump body and the backward flow valve, can prevent liquid reflux better.

Description

Emulsion pump capable of better preventing liquid from flowing back
Technical Field
The utility model relates to a liquid outlet component of cosmetics and bath articles, in particular to an emulsion pump capable of better preventing liquid from flowing back.
Background
Emulsion pumps on the market generally comprise a press head, a lock cover, an outer cover, a pump body, a piston assembly and a compression spring; the side wall of the inner cavity of the lock cover is provided with inner threads, the lock cover is arranged at the upper end of the pump body, and the outer cover can be rotatably sleeved on the outer side of the lock cover; a liquid inlet is formed in the bottom of the pump body, and a check valve is arranged at the position of the liquid inlet; the piston assembly and the compression spring are arranged in the pump body, the piston assembly comprises a main column, a piston and an auxiliary column, the upper end of the auxiliary column is connected with the lower end of the main column, the press head is connected with the upper end of the main column, a first flow channel which runs up and down is arranged in the auxiliary column, a second flow channel which runs up and down is arranged in the main column, a third flow channel is arranged in the press head, and the first flow channel, the second flow channel and the third flow channel are sequentially communicated; the piston is annular and sleeved on the main column, the inner side wall of the piston is tightly contacted with the outer side wall of the main column, and the outer side wall of the piston is tightly contacted with the inner side wall of the pump body; the outer side wall of the main column is provided with a limiting ring, the lower side surface of the limiting ring is provided with an annular groove with a downward opening, and the upper end of the piston is matched with the annular groove (when the piston rises relative to the main column, the upper end of the piston can be embedded into the annular groove); the upper end of the compression spring is in contact with the auxiliary column, and the lower end of the compression spring is in contact with the pump body (the compression spring can apply upward acting force to the auxiliary column to enable the auxiliary column, the main column and the piston to ascend and reset).
In the emulsion pump, the check valve comprises a glass ball and a valve seat formed at the bottom of the pump body, the valve seat is provided with a truncated cone-shaped cavity with a large upper part and a small lower part (the bottom of the truncated cone-shaped cavity is communicated with the liquid inlet), and the glass ball is positioned in the truncated cone-shaped cavity. The glass ball can seal the liquid inlet of the pump body, and emulsion in the pump body is prevented from flowing back into a packaging bottle. However, the sealing fit between the glass ball and the valve seat at the bottom of the pump body is too simple, and after the emulsion pump is used for a long time, the glass ball cannot be well restored into the circular truncated cone-shaped cavity of the valve seat, so that the sealing effect between the glass ball and the valve seat is easily deteriorated, liquid backflow is easily caused, and the requirements of users cannot be met.
Disclosure of Invention
The utility model aims to solve the problem that an emulsion pump that can prevent liquid reflux better is provided, and this kind of emulsion pump that can prevent liquid reflux better through increasing the sealing performance between the pump body and the backward flow valve.
In order to solve the technical problem, the utility model discloses a technical scheme as follows:
a lotion pump capable of better preventing liquid from flowing back comprises a press head, a lock cover, a pump body, an outer cover and a main column assembly, wherein inner threads are arranged on the side wall of an inner cavity of the lock cover; the main column assembly comprises a main column, a piston, an auxiliary column and a compression spring, the upper end of the auxiliary column is connected with the main column, a first flow passage which moves up and down is arranged in the main column, a second flow passage is arranged in the auxiliary column, and the second flow passage is communicated with the first flow passage; the lower end of the auxiliary column is provided with at least one liquid inlet hole which is communicated with the second flow channel; the piston is annular and is sleeved on the auxiliary column, the inner side wall of the piston is in close contact with the outer side wall of the auxiliary column, and the outer side wall of the piston is in close contact with the inner side wall of the pump body; the compression spring is sleeved on the upper section of the main column, the upper end of the compression spring is contacted with the upper end of the main column, and the lower end of the compression spring is contacted with the upper end of the lock cover; the press head is provided with a third flow passage, the press head is connected with the upper end of the main column, and the third flow passage is communicated with the first flow passage; the pump body bottom is equipped with the inlet, its characterized in that: a backflow valve is arranged at the liquid inlet, the backflow valve comprises an outer ring, a central circular truncated cone and at least two connecting strips, the outer ring is positioned on the outer side of the central circular truncated cone, the inner side wall of the outer ring is connected with the outer side wall of the central circular truncated cone through the connecting strips, and the outer ring and the central circular truncated cone are separated by the connecting strips to form a plurality of liquid inlet gaps; the bottom of the pump body is equipped with the disk seat, and the disk seat is in the top of inlet, the inlet passes through the feed liquor clearance and communicates with the inner chamber of the pump body, the bottom surface and the disk seat in close contact with of center round platform, the lateral wall of outer loop and the inside wall in close contact with of the pump body, the bottom of auxiliary column and the top surface contact cooperation of center round platform.
When the product packaged by the packaging bottle is in an unused state, the liquid inlet is sealed by the backflow valve at the bottom of the pump body, the pump body cavity above the backflow valve is in a sealed state, and at the moment, no emulsion exists in the second flow channel, the first flow channel and the third flow channel.
When the press head is pressed downwards, the press head drives the main column and the auxiliary column to move downwards, the compression spring is compressed, the piston rises to a high position relative to the auxiliary column, and the liquid inlet hole of the second flow channel is opened, so that the liquid inlet hole is communicated with the cavity of the pump body, and emulsion in the cavity at the lower part of the pump body can smoothly enter the second flow channel; when the piston moves downwards along with the main column, the emulsion in the pump body is subjected to pressure, so that the backflow valve is subjected to the pressure of the emulsion to seal the liquid inlet at the bottom of the pump body, the emulsion cannot flow back into the packaging bottle through the liquid inlet gap of the backflow valve, and the emulsion in the cavity of the pump body can only flow out of the liquid inlet hole in the auxiliary column, the second flow channel, the first flow channel of the main column and the third flow channel in the button in sequence.
After the pressing head is released and the pressing force is removed, the main column is acted by the upward rebound force of the compression spring to drive the pressing head and the auxiliary column to move upwards, the piston is lowered to a low position relative to the auxiliary column, and the liquid inlet hole at the lower part of the auxiliary column is closed, so that the liquid inlet hole is separated from the cavity of the pump body, and the negative pressure is generated in the cavity of the pump body; under the action of rebound and reset of the compression spring, the press head, the main column and the auxiliary column can drive the piston to continuously ascend and reset, negative pressure is generated in the pump body cavity, the backflow valve at the bottom of the pump body is upwards jacked up, and emulsion in the packaging bottle enters the pump body cavity through the liquid inlet gap of the liquid inlet and the backflow valve.
The backflow valve is used for sealing or opening a liquid inlet at the bottom of the pump body. The bottom surface of the central circular truncated cone of the backflow valve is in close contact with the valve seat at the bottom of the pump body, so that the sealing fit between the backflow valve and the valve seat can be enhanced; the outer side wall of the outer ring is in close contact with the inner side wall of the pump body, so that the sealing fit between the reflux valve and the inner side wall of the pump body can be enhanced, and double-layer sealing is realized.
Of course, the matching between the press head, the lock cover, the pump body, the outer cover, the main column assembly and the reflux valve is not unique, and the emulsion pump can also use the press head, the lock cover, the pump body, the outer cover and the main column assembly with other structures to match with the reflux valve according to actual needs.
As the utility model discloses a preferred scheme, the material of outer loop, central round platform, connecting strip is plastics, and outer loop, connecting strip, central round platform an organic whole are moulded plastics and are formed. The plastic is hard plastic with certain elasticity, so that the backflow valve can rebound in the jacking and descending processes.
As the utility model discloses a preferred scheme, the connecting strip is the arc strip, and the arc strip has interior link and outer link, and the arc strip is followed the circumference of center round platform is crooked, and the outer end of outer link is connected with the inside wall of outer loop, and the inner of interior link is connected with the lateral wall of center round platform. When negative pressure is generated in the pump body cavity and the reflux valve is jacked upwards, the arc-shaped strip is distorted and deformed due to the negative pressure, and the emulsion is pumped into the pump body cavity from the liquid inlet gap; when the reflux valve is pressed by emulsion to close the liquid inlet at the bottom of the pump body, the arc-shaped strip is restored to the original state, so that the bottom surface of the central circular truncated cone is in sealing fit with the valve seat.
In a preferred scheme, the inner edge of the valve seat is provided with a first annular step, the bottom surface of the central circular truncated cone is a plane, and the edge of the plane is positioned above the first annular step and is in close contact with the first annular step. Through the arrangement, the bottom surface of the central circular truncated cone of the valve seat is in sealing fit with the first annular step on the inner edge of the valve seat, and plane sealing is realized.
In another preferred scheme, the interior border of disk seat is equipped with first inclined plane, and first inclined plane is from outer to interior downward sloping gradually, the bottom border of center round platform be equipped with first inclined plane complex second inclined plane, the second inclined plane from outer to interior downward sloping gradually, second inclined plane and first inclined plane in close contact with. Through the arrangement, the second inclined plane of the circular truncated cone at the center of the valve seat is in sealing fit with the first inclined plane of the inner edge of the valve seat, and the inclined plane is sealed.
As the utility model discloses a preferred scheme, be equipped with the protruding edge of annular on the inside wall of the pump body, the protruding edge of annular is in the top of outer loop up end and with outer loop up end in close contact with.
As the utility model discloses a preferred scheme, the lower part of vice post is equipped with the spacing recess that the opening is decurrent, works as press the head down to press when on the earth, the upper portion of center round platform is in spacing recess, the lower terminal surface of vice post is in the top in feed liquor clearance.
As a further preferred scheme of the utility model, the internal diameter of spacing recess is from last to grow gradually down, the upper portion of center round platform is equipped with the spacing portion of big end down's round platform form, spacing portion of round platform form and the cooperation of spacing recess contact. When the pressing head is pressed downwards to the bottom, the circular truncated cone-shaped limiting part is positioned in the limiting groove; after the press head is released and the pressing force is removed, the auxiliary column gradually moves upwards along with the press head and the main column, and the circular truncated cone-shaped limiting part is disengaged from the limiting groove.
Generally, the above-mentioned locking cap is used to be coupled with a mouth of a packing bottle, thereby mounting the lotion pump to the packing bottle. The top of the pump body is also provided with an annular gasket, the upper end face of the annular gasket is in close contact with the lower end face of the top of the pump body, and the lower end face of the annular gasket is in close contact with the upper end face of the bottle opening of the packaging bottle, so that the packaging bottle is in sealed fit with the pump body.
The emulsion pump also comprises a pipette, the lower end of the pump body is integrally connected with a connecting pipe, the upper end of the pipette is spliced with the connecting pipe (usually, the upper end of the pipette is inserted in the connecting pipe), and the pipette is communicated with a liquid inlet at the bottom of the pump body. The depth of the emulsion pump extending into the liquid can be increased by using the pipette.
Compared with the prior art, the utility model, have following advantage:
the utility model discloses a backwash valve realizes double-deck sealed, can prevent liquid reflux better, and is more guaranteed with the sealed of pump body bottom for traditional glass ball, and the emulsion flows back the probability in the packing bottle littleer, also makes the resilience of parts such as according to head, principal post, subpost more smooth and easy simultaneously for according to pressing down of head feel and the pumping volume is more smooth and easy, accurate.
Drawings
FIG. 1 is a schematic structural diagram of embodiment 1 of the present invention;
fig. 2 is a schematic structural diagram of a reflux valve in embodiment 1 of the present invention.
Fig. 3 is a schematic structural view of the central circular truncated cone of embodiment 1 of the present invention, in which the upper portion of the central circular truncated cone is located in the limiting groove;
fig. 4 is a schematic structural diagram of embodiment 2 of the present invention.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
Example 1
As shown in fig. 1-3, the lotion pump capable of better preventing liquid from flowing back in this embodiment includes a button 1, a lock cover 2, a pump body 3, an outer cover 4 and a main column assembly 5, wherein the side wall of the inner cavity of the lock cover 2 has internal threads, the lock cover 2 is installed at the upper end of the pump body 3, the outer cover 4 is rotatably sleeved on the outer side of the lock cover 2, and the main column assembly 5 is installed in the inner cavity of the pump body 3; the main column assembly 5 comprises a main column 51, a piston 52, an auxiliary column 53 and a compression spring 54, wherein the upper end of the auxiliary column 53 is connected with the main column 51, a first flow passage 511 which runs up and down is arranged in the main column 51, a second flow passage 531 is arranged in the auxiliary column 53, and the second flow passage 531 is communicated with the first flow passage 511; the lower end of the auxiliary column 53 is provided with three liquid inlet holes 533, and the liquid inlet holes 533 are communicated with the second flow channel 531; the piston 52 is annular and is sleeved on the auxiliary column 53, the inner side wall of the piston 52 is tightly contacted with the outer side wall of the auxiliary column 53, and the outer side wall of the piston 52 is tightly contacted with the inner side wall of the pump body 3; the compression spring 54 is sleeved on the upper section of the main column 51, the upper end of the compression spring 54 is contacted with the upper end of the main column 51, and the lower end of the compression spring 54 is contacted with the upper end of the lock cover 2; the press head 1 is provided with a third flow channel 11, the press head 1 is connected with the upper end of the main column 51, and the third flow channel 11 is communicated with the first flow channel 511; the bottom of the pump body 3 is provided with a liquid inlet 31, a backflow valve 6 is arranged at the liquid inlet 31, the backflow valve 6 comprises an outer ring 61, a central circular truncated cone 62 and three connecting strips 63, the outer ring 61 is positioned at the outer side of the central circular truncated cone 62, the inner side wall of the outer ring 61 is connected with the outer side wall of the central circular truncated cone 62 through the connecting strips 63, and the outer ring 61 and the central circular truncated cone 62 are separated by the connecting strips 63 to form a plurality of liquid inlet gaps 64; the bottom of the pump body 3 is provided with a valve seat 32, the valve seat 32 is positioned above the liquid inlet 31, the liquid inlet 31 is communicated with an inner cavity of the pump body 3 through a liquid inlet gap 64, the bottom surface of the central circular truncated cone 62 is in close contact with the valve seat 32, the outer side wall of the outer ring 61 is in close contact with the inner side wall of the pump body 3, and the bottom of the auxiliary column 53 is in contact fit with the top surface of the central circular truncated cone 62.
The outer ring 61, the central circular truncated cone 62 and the connecting strip 63 are all made of plastics, and the outer ring 61, the connecting strip 63 and the central circular truncated cone 62 are integrally formed by injection molding. The plastic is hard plastic with certain elasticity, so that the backflow valve 6 can rebound in the jacking and descending processes.
The connecting strip 63 is an arc strip 631, the arc strip 631 has an inner connecting end 632 and an outer connecting end 633, the arc strip 631 bends along the circumferential direction of the central circular truncated cone 62, the outer end of the outer connecting end 633 is connected with the inner side wall of the outer ring 61, and the inner end of the inner connecting end 632 is connected with the outer side wall of the central circular truncated cone 62. When negative pressure is generated in the cavity of the pump body 3 and the backflow valve 6 is jacked upwards, the arc-shaped strip 631 is distorted and deformed due to the negative pressure, and emulsion is pumped into the cavity of the pump body 3 from the liquid inlet gap 64; when the return valve 6 is pressurized by the emulsion to close the liquid inlet 31 at the bottom of the pump body 3, the arc-shaped strip 631 returns to the original state, so that the bottom surface of the central circular truncated cone 62 is in sealing fit with the valve seat 32.
The inner edge of the valve seat 32 is provided with a first annular step 321, the bottom surface of the central circular truncated cone 62 is a plane, and the edge of the plane is located above the first annular step 321 and is in close contact with the first annular step 321. Through the arrangement, the bottom surface of the central circular truncated cone 62 of the valve seat 32 is in sealing fit with the first annular step 321 on the inner edge of the valve seat 32, and plane sealing is realized.
An annular convex edge 33 is arranged on the inner side wall of the pump body 3, and the annular convex edge 33 is positioned above the upper end surface of the outer ring 61 and is tightly contacted with the upper end surface of the outer ring 61.
The lower part of the auxiliary column 53 is provided with a limiting groove 532 with a downward opening, when the pressing head 1 is pressed downwards to the bottom, the upper part of the central circular truncated cone 62 is positioned in the limiting groove 532, and the lower end surface of the auxiliary column 53 is positioned above the liquid inlet gap 64.
The inner diameter of the limiting groove 532 gradually increases from top to bottom, a round table-shaped limiting portion 621 which is small in top and large in bottom is arranged on the upper portion of the central round table 62, and the round table-shaped limiting portion 621 is in contact fit with the limiting groove 532. When the pressing head 1 is pressed downwards to the bottom, the truncated cone-shaped limiting part 621 is positioned in the limiting groove 532; when the pressing head 1 is released and the pressing force is released, the sub-post 53 gradually moves upward along with the pressing head 1 and the main post 51, and the circular truncated cone-shaped limiting part 621 is disengaged from the limiting groove 532.
Generally, the above-mentioned locking cap 2 is used to be coupled with a mouth of a packing bottle, thereby mounting the lotion pump to the packing bottle. The top of the pump body 3 is also provided with an annular gasket 7, the upper end face of the annular gasket 7 is in close contact with the lower end face of the top of the pump body 3, and the lower end face of the annular gasket 7 is in close contact with the upper end face of the bottle opening of the packaging bottle, so that the packaging bottle is in sealed fit with the pump body 3.
The emulsion pump can also comprise a pipette 8, the lower end of the pump body 3 is integrally connected with a connecting pipe 34, the upper end of the pipette 8 is inserted into the connecting pipe 34 (usually, the upper end of the pipette 8 is inserted into the connecting pipe 34), and the pipette 8 is communicated with the liquid inlet 31 at the bottom of the pump body 3. The depth of the emulsion pump into the liquid can be increased by means of the pipette 8.
When the product packaged by the packaging bottle is in an unused state, the liquid inlet 31 is sealed by the backflow valve 6 at the bottom of the pump body 3, the cavity of the pump body 3 above the backflow valve 6 is in a sealed state, and at the moment, no emulsion exists in the second flow passage 531, the first flow passage 511 and the third flow passage 11.
When the press head 1 is pressed downwards, the press head 1 drives the main column 51 and the auxiliary column 53 to move downwards, the compression spring 54 is compressed, the piston 52 rises to a high position relative to the auxiliary column 53, and the liquid inlet hole 533 of the second flow passage 531 is opened, so that the liquid inlet hole 533 is communicated with the cavity of the pump body 3, and emulsion in the cavity at the lower part of the pump body 3 can smoothly enter the second flow passage 531; when the piston 52 moves downward along with the main column 51, the emulsion in the pump body 3 is pressurized, so that the backflow valve 6 is pressurized by the emulsion to close the liquid inlet 31 at the bottom of the pump body 3, and the emulsion cannot flow back into the packaging bottle through the liquid inlet 31 through the liquid inlet gap 64 of the backflow valve 6, so that the emulsion in the cavity of the pump body 3 can only flow out from the liquid inlet hole 533 in the auxiliary column 53, the second flow passage 531, the first flow passage 511 of the main column 51 and the third flow passage 11 in the pressing head 1 in sequence.
After the pressing head 1 is released and the pressing force is released, the main column 51 is acted by the upward rebound force of the compression spring 54 to drive the pressing head 1 and the auxiliary column 53 to move upwards, the piston 52 descends to a low position relative to the auxiliary column 53, and the liquid inlet hole 533 at the lower part of the auxiliary column 53 is closed, so that the liquid inlet hole 533 is separated from the cavity of the pump body 3, and the negative pressure is generated in the cavity of the pump body 3; under the action of resilience resetting of the compression spring 54, the press head 1, the main column 51 and the auxiliary column 53 can drive the piston 52 to continuously rise and reset, negative pressure is generated in the cavity of the pump body 3, the backflow valve 6 at the bottom of the pump body 3 is jacked upwards, and emulsion in a packaging bottle enters the cavity of the pump body 3 through the liquid inlet 31 and the liquid inlet gap 64 of the backflow valve 6.
The return valve 6 is used for sealing or opening the liquid inlet 31 at the bottom of the pump body 3. The bottom surface of the central circular truncated cone 62 of the backflow valve 6 is tightly contacted with the valve seat 32 at the bottom of the pump body 3, so that the sealing fit between the backflow valve 6 and the valve seat 32 can be enhanced; the outer side wall of the outer ring 61 is in close contact with the inner side wall of the pump body 3, so that the sealing fit between the reflux valve 6 and the inner side wall of the pump body 3 can be enhanced, and double-layer sealing is realized.
Of course, the fitting between the plunger 1, the lock cap 2, the pump body 3, the outer cap 4, the main column assembly 5, and the return valve 6 is not exclusive, and the emulsion pump may be fitted with the return valve 6 using the plunger 1, the lock cap 2, the pump body 3, the outer cap 4, and the main column assembly 5 of other structures according to actual needs.
Example 2
As shown in fig. 4, the emulsion pump of this embodiment, which can prevent the liquid from flowing back better, is different from that of embodiment 1 in that:
the interior border of valve seat 32 is equipped with first inclined plane 322, and first inclined plane 322 is from outer slope 622 to interior slope down gradually, the bottom border of center round platform 62 be equipped with first inclined plane 322 complex second inclined plane 622, second inclined plane 622 from outer slope 622 to interior slope down gradually, second inclined plane 622 and first inclined plane 322 in close contact with. Through the arrangement, the second inclined surface 622 of the central circular truncated cone 62 of the valve seat 32 is in sealing fit with the first inclined surface 322 of the inner edge of the valve seat 32, and inclined surface sealing is achieved.
In addition, it should be noted that the names of the various parts of the embodiments described in the present specification may be different, and all the equivalent or simple changes made according to the structures, characteristics and principles of the present invention are included in the protection scope of the present invention. Various modifications, additions and substitutions may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.

Claims (8)

1. A lotion pump capable of better preventing liquid from flowing back comprises a press head, a lock cover, a pump body, an outer cover and a main column assembly, wherein inner threads are arranged on the side wall of an inner cavity of the lock cover; the main column assembly comprises a main column, a piston, an auxiliary column and a compression spring, the upper end of the auxiliary column is connected with the main column, a first flow passage which runs up and down is arranged in the main column, a second flow passage is arranged in the auxiliary column, and the second flow passage is communicated with the first flow passage; the lower end of the auxiliary column is provided with at least one liquid inlet hole which is communicated with the second flow channel; the piston is annular and is sleeved on the auxiliary column, the inner side wall of the piston is in close contact with the outer side wall of the auxiliary column, and the outer side wall of the piston is in close contact with the inner side wall of the pump body; the compression spring is sleeved on the upper section of the main column, the upper end of the compression spring is contacted with the upper end of the main column, and the lower end of the compression spring is contacted with the upper end of the lock cover; the press head is provided with a third flow passage, the press head is connected with the upper end of the main column, and the third flow passage is communicated with the first flow passage; the pump body bottom is equipped with inlet, its characterized in that: a backflow valve is arranged at the liquid inlet, the backflow valve comprises an outer ring, a central circular truncated cone and at least two connecting strips, the outer ring is positioned on the outer side of the central circular truncated cone, the inner side wall of the outer ring is connected with the outer side wall of the central circular truncated cone through the connecting strips, and the outer ring and the central circular truncated cone are separated by the connecting strips to form a plurality of liquid inlet gaps; the bottom of the pump body is provided with a valve seat, the valve seat is positioned above the liquid inlet, the liquid inlet is communicated with the inner cavity of the pump body through a liquid inlet gap, the bottom surface of the central circular truncated cone is in close contact with the valve seat, the outer side wall of the outer ring is in close contact with the inner side wall of the pump body, and the bottom of the auxiliary column is in contact fit with the top surface of the central circular truncated cone.
2. An emulsion pump of claim 1 which is more resistant to backflow of liquids, wherein: the outer ring, the central circular truncated cone and the connecting strip are made of plastics and are integrally formed by injection molding.
3. An emulsion pump of claim 1 which is more resistant to backflow of liquids, wherein: the connecting strip is an arc-shaped strip, the arc-shaped strip is provided with an inner connecting end and an outer connecting end, the arc-shaped strip is bent along the circumferential direction of the central circular truncated cone, the outer end of the outer connecting end is connected with the inner side wall of the outer ring, and the inner end of the inner connecting end is connected with the outer side wall of the central circular truncated cone.
4. An emulsion pump better able to prevent backflow of liquids as in claim 1, wherein: the inner edge of the valve seat is provided with a first annular step, the bottom surface of the central circular truncated cone is a plane, and the edge of the plane is positioned above the first annular step and is in close contact with the first annular step.
5. An emulsion pump better able to prevent backflow of liquids as in claim 1, wherein: the interior border of disk seat is equipped with first inclined plane, and first inclined plane is from outer to interior downward sloping gradually, the bottom border of center round platform be equipped with first inclined plane complex second inclined plane, the second inclined plane from outer to interior downward sloping gradually, second inclined plane and first inclined plane in close contact with.
6. An emulsion pump better able to prevent backflow of liquids as in claim 1, wherein: and an annular convex edge is arranged on the inner side wall of the pump body, is positioned above the upper end surface of the outer ring and is in close contact with the upper end surface of the outer ring.
7. An emulsion pump of claim 1 which is more resistant to backflow of liquids, wherein: the lower part of the auxiliary column is provided with a limiting groove with a downward opening, when the pressing head is pressed downwards to the bottom, the upper part of the central circular truncated cone is positioned in the limiting groove, and the lower end face of the auxiliary column is positioned above the liquid inlet gap.
8. An emulsion pump of claim 7 having improved resistance to backflow of liquid, wherein: the inner diameter of the limiting groove is gradually increased from top to bottom, a round table-shaped limiting portion which is small in top and large in bottom is arranged on the upper portion of the central round table, and the round table-shaped limiting portion is in contact fit with the limiting groove.
CN202220942000.3U 2022-04-22 2022-04-22 Emulsion pump capable of better preventing liquid from flowing back Active CN217049760U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202220942000.3U CN217049760U (en) 2022-04-22 2022-04-22 Emulsion pump capable of better preventing liquid from flowing back

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202220942000.3U CN217049760U (en) 2022-04-22 2022-04-22 Emulsion pump capable of better preventing liquid from flowing back

Publications (1)

Publication Number Publication Date
CN217049760U true CN217049760U (en) 2022-07-26

Family

ID=82472376

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202220942000.3U Active CN217049760U (en) 2022-04-22 2022-04-22 Emulsion pump capable of better preventing liquid from flowing back

Country Status (1)

Country Link
CN (1) CN217049760U (en)

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