WO2016154787A1

WO2016154787A1 - Quantitative spray valve

Info

Publication number: WO2016154787A1
Application number: PCT/CN2015/075203
Authority: WO
Inventors: 李明
Original assignee: 南京腾亚精工科技有限公司
Priority date: 2015-03-27
Filing date: 2015-03-27
Publication date: 2016-10-06
Also published as: CN106794934B; NZ736604A; AU2015388868A1; CN106794934A; AU2015388868B2

Abstract

A quantitative spray valve comprises a tubular valve (7) and a valve rod (1) inserted into the valve (7). A middle section of the valve rod (1) has a radial through-hole (1-2) communicating with an axial blind hole (1-1). The valve (7) is provided with a quantitative chamber (11). The valve rod (1) has a radial projection (1-3). When the valve rod (1) is at an outer limit position, the radial through-hole (1-2) is located outside of the quantitative chamber (11), the quantitative chamber (11) is isolated from the outside, and an inner end of the quantitative chamber (11) communicates with a fluid container. When the valve rod (1) is at an inner limit position, the radial through-hole (1-2) is located within the quantitative chamber (11), the quantitative chamber (11) communicates with the outside and the inner end of the quantitative chamber (11) is isolated from the fluid container by the radial projection (1-3). When the valve rod (1) is at a preset transition section between the outer limit position and the inner limit position, the radial through-hole (1-2) is located within the quantitative chamber (11), and the quantitative chamber (11) communicates with the outside and the fluid container. The quantitative spray valve has a simple structure and favorable sealability. The valve rod has a sufficient length from outside to inside, and effectively inhibits a quantitation failure caused by an offset. When the valve rod is controlled to be in a preset transition section between the outer limit position and the inner limit position and does not perform a filling operation but instead performs a spraying operation, the present invention can be used as an ordinary non-quantitative spray valve.

Description

Quantitative spray valve

Technical field

The invention relates to a spray valve, in particular to a quantitative spray valve, belonging to the technical field of fluid transport control devices.

Background technique

Aerosols are widely used in many fields such as cosmetics, medicine, and environmental protection. In some cases, there are strict requirements on the dosage of the aerosol, which needs to be controlled by means of an aerosol valve containing a metering valve.

The Chinese Patent Application Publication No. CN103803185 discloses a quantitative spray valve including an inner valve body, a metering valve chamber disposed in the inner valve body, an inner valve stem axially extending through the metering valve chamber, and an inner valve An annular boss is disposed in the middle of the rod, and the first sealing ring is fixedly disposed on the quantitative valve chamber, and the first sealing ring is sealingly engaged with the upper rod of the inner valve stem above the annular boss; a radially-distributed liquid inlet hole and an axially-distributed liquid discharge hole; the bottom of the liquid discharge hole is in communication with the liquid inlet hole; and the inner valve stem is disposed on the lower rod body below the annular boss a first annular tapered surface, the bottom port of the quantitative valve chamber is provided with a second annular tapered surface, the first and second annular tapered surfaces are opposite to each other; the inner valve stem is pressed down, and the inner valve stem is moved down to When the liquid inlet hole on the inner valve stem is below the first sealing ring, the first and second annular tapered surfaces are adapted to be sealingly fitted, and only the liquid in the metering valve chamber can be ejected, thereby realizing Quantitative spray function.

Although the use of such a valve can achieve quantitative output and filling functions, it has been proved that this prior art valve has the following drawbacks:

1) The metering and filling functions must be realized by the internal and external double valve stem structure. Since the inner valve stem and the outer valve stem are gap-fitted, leakage cannot be avoided during filling, resulting in waste, which is serious for volatile components. There are still security risks.

2) After the outer valve stem and the metering chamber are press-fitted, they depend on the spring to abut each other, because Under the action of the spring, the two are in a floating state for a long time, so the relative position is difficult to maintain stable, especially when the downward movement of the inner valve stem is too large, the quantitative chamber will be displaced downward, resulting in the separation from the outer valve stem, not only Causes quantitative failure and is unsafe due to leakage.

3) The length of the valve stem is short, and the easy deflection affects the sealing effect, leading to quantitative failure.

4) The number of parts is large, the structure is complex, and the manufacturing cost is high.

Summary of the invention

The object of the present invention is to provide a quantitative spray valve capable of ensuring long-term sealing effect and avoiding leakage without losing function and without increasing the number of parts, in view of the defects of the prior art described above. To ensure safe use.

In order to achieve the above object, the basic technical solution of the quantitative spray valve of the present invention comprises: a valve body including an outer end and a middle portion respectively sealed and fixed to the cup cover and the fluid container, and an outer limit position and an inner limit position which are inserted in the valve body. a valve stem; the middle portion of the valve stem has a radial perforation in communication with the axial blind hole and tends to an outer limit position; a quantitative chamber is disposed between the middle portion and the bottom end of the valve body, and the valve stem is located in the quantitative The inner portion has a radial protrusion; when the valve stem is in an outer limit position, the radial perforation is located outside the dosing chamber, the dosing chamber is blocked from the outside to communicate with the fluid container; when the valve stem is at the inner limit In position, the radial perforations are located within the dosing chamber, the dosing chamber is in communication with the outside to be blocked from the fluid container by the radial protrusion; when the valve stem is in a predetermined transition between the outer extreme position and the inner extreme position In the section, the radial perforations are located within a dosing chamber that is in communication with the outside and in communication with the fluid container.

Therefore, the quantitative spray valve of the present invention can realize the quantitative spray function of pre-storing the spray in the fluid container in the quantitative chamber by means of the switching between the outer limit position and the inner limit position, and can be quantitatively released by means of the transition section. The filling and filling and non-quantitative release functions of the fluid container are realized. Since there is only one valve stem, it not only simplifies the structure, but also avoids the leakage factor caused by the double valve stem, and the measuring chamber is fixedly mounted in the valve body. The seal will not be affected by its unstable position; in addition, the integral valve stem has sufficient length from the outside to the inside, which effectively suppresses the quantitative failure caused by the offset. In particular, if the control valve stem is in a predetermined transition section between the outer limit position and the inner limit position, the metered spray of the present invention can be used as a non-quantitative ordinary spray valve without performing a filling operation but spraying.

It can be seen that the present invention not only overcomes the various shortcomings of the prior art, but also increases the use function, has outstanding substantive features and significant progress.

DRAWINGS

The invention will now be further described with reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a schematic view showing the outer limit position structure of a preferred embodiment of the present invention.

2 is a schematic view showing the structure of the inner limit position of the embodiment of FIG. 1.

3 is a schematic structural view of a transition section of the embodiment of FIG. 1.

detailed description

Embodiment 1

The quantitative spray valve of the present embodiment has a structure as shown in FIG. 1 and includes a tubular valve body 7. The outer circumference of the outer end is press-fitted with the cup cover 4, and the inner hole of the outer end and the chassis 2-1 of the limit sleeve 2. In the middle of the chassis 2-1, the center of the chassis 2-1 extends outwardly from the guiding tube 2-2. The outer circumference of the guiding tube 2-2 and the counterbore of the outer port of the valve body 7 are limited to the end of the cup cover 4 Outer seal ring 3. The middle portion of the valve body 7 extends radially outwardly from the lock ring 10 and the lock bag seal 8 to form a lock ring 7-1 for sealing and sealing the fluid container (bag) port. The outer end of the lock ring 10 has a ring 10-1 opposite to the lock ring 7-1, and the inner end is tapered by a transition arc into a lock cylinder 10-2 that is caught in a recess corresponding to the position of the valve body 7. The valve stem 1 is inserted into the valve body 7 through the limit sleeve 2, and has a limit projection 1-4 corresponding to the position in the limit sleeve 2, thus having an outer limit position. A dosing chamber 11 is disposed between the middle portion and the inner end (ie, the lower end) of the valve body 7. The inner end hole of the dosing chamber 11 has a gap with the corresponding position of the valve stem 1, and the portion of the valve stem 1 located in the dosing chamber 11 has The outer diameter is larger than the radial projections 1-3 of the inner end holes of the dosing chamber 11, and thus has an inner limit position. In order to facilitate assembly and sealing, the inner sleeve 5 of the inner seal ring 9 is disposed between the outer end of the dosing chamber 11 and the limit sleeve 2, and between the inner sleeve 5 and the limiting protrusion 1-3 of the valve stem 1 The spring 6 is mounted so that the valve stem 1 tends to the outer limit position. The middle section of the valve stem 1 has a radial bore 1-2 that communicates with the axial blind bore 1-1.

When the valve stem 1 is in the outer limit position under the reset action of the spring 6, as shown in FIG. 1, the radial perforation 1-2 on the valve stem is located outside the dosing chamber 11, and the dosing chamber 11 cannot communicate with the axial direction of the valve stem 1. The blind hole 1-1 is thus blocked from the outside, but since its lower end perforation is not blocked by the radial projections 1-3, it communicates with the fluid container via the gap with the valve stem 1. At this point the fluid in the fluid container will fill the dosing chamber.

When the valve stem 1 is completely urged against the force of the spring 6 by the external force, in the inner limit position, as shown in FIG. 2, the radial through hole 1-2 on the valve stem is located in the dosing chamber 11, through which the dosing chamber 11 passes The axial blind hole 1-1 of the valve stem 1 communicates with the outside, and the gap between the low end perforation and the valve stem 1 is closed by the radial projections 1-3 on the valve stem, thereby being blocked from the fluid container. At this time, the fluid originally filled in the dosing chamber 11 will quantitatively release the output.

When the valve stem 1 is subjected to the external force to partially overcome the force of the spring 6, in a predetermined transition section between the outer limit position and the inner limit position, as shown in FIG. 3, the radial perforations 1-2 on the valve stem are located in the quantitative In the chamber 11, the dosing chamber 11 communicates with the axial blind hole 1-1 of the valve stem 1 through the hole, thereby communicating with the outside, and the low-end perforation is not blocked by the radial projections 1-3, so the dosing chamber 11 The fluid container is also in communication via the low end perforations and the gap of the valve stem 1. At this point, the fluid of the fluid container can be artificially controlled to non-quantitative release output, or external high pressure fluid can be poured into the fluid container.

It can be seen that, based on the prior art, the quantitative spray valve of the present embodiment can realize the pre-storage of the spray in the fluid container in the quantitative chamber by switching between the outer limit position and the inner limit position by simple and ingenious improvement. Quantitative spray function for re-quantitative release; filling and filling and non-quantitative release of fluid containers can also be achieved by means of the transition section can. Tests have proven that its performance is reliable and easy to operate, especially for burning power tools such as nail guns.

Other than the above-described embodiments, the present invention may have other embodiments. Any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope of the present invention.

Claims

A quantitative spray valve comprising a valve body in which an outer end and a middle portion are respectively sealed and sealed with a cup cover and a fluid container, and a valve stem inserted in the valve body having an outer limit position and an inner limit position; the middle portion of the valve stem has a radial perforation communicating with the axial blind hole and tending to an outer limit position; wherein: a quantitative chamber is disposed between the middle portion and the bottom end of the valve body, and the portion of the valve stem located in the quantitative chamber has a radial direction a protrusion; when the valve stem is in an outer limit position, the radial perforation is located outside the dosing chamber, the dosing chamber is blocked from the outside to communicate with the fluid container; when the valve stem is in the inner limit position, the diameter The perforation is located within the dosing chamber, the dosing chamber being in communication with the outside to be blocked from the fluid container by the radial projection; and when the valve stem is in a predetermined transition between the outer extreme position and the inner extreme position, A radial perforation is located within the dosing chamber that is in communication with the outside and in communication with the fluid container.
The metered dose valve of claim 1 wherein the outer circumference of the outer end of the valve is press-fitted to the cup lid.
The metering spray valve according to claim 2, wherein the inner hole of the outer end of the valve is tightly coupled to the chassis of the limiting sleeve.
A metered dose valve according to claim 3 wherein the central portion of the chassis projects out of the guide tube.
The metering spray valve according to claim 4, wherein the outer circumference of the guide tube and the counterbore of the outer port of the valve are fitted with an outer seal ring that is limited to the flange of the end of the lid.
The metering spray valve according to claim 5, wherein the middle portion of the valve body extends radially to form a lock ring with the lock ring and the lock bag sealing ring to clamp and seal the fluid container port.
The quantitative spray valve according to claim 6, wherein the outer end of the lock ring has a ring opposite to the lock ring, and the inner end thereof is tapered by a transition arc to be caught in the corresponding position depression of the valve body. Locking column.
The metering spray valve according to claim 7, wherein the valve stem is inserted into the valve body through the limiting sleeve, and the position in the corresponding limiting sleeve has a limiting protrusion.
The metering spray valve according to claim 8, wherein the inner end hole of the dosing chamber has a gap with a corresponding position of the valve stem.
The quantitative spray valve according to claim 9, wherein an inner sleeve of the inner seal and the inner end of the inner sleeve and the valve stem are arranged between the outer end of the quantitative chamber and the limiting sleeve. A spring is placed between the projections.