JP2512368B2 - Flow control valve - Google Patents

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention comprises a flowable product exposed to gas pressure and a delivery valve in a delivery duct.
When opening the delivery valve, the product is a flow rate adjusting valve for a container, which is adapted to end out of the delivery duct and flow out, comprising a valve seat made of a hard material and a rubber elastic adjusting member,
Provided in the delivery duct, the rubber elasticity adjusting member,
When the delivery duct is opened, it is urged against the valve seat by the internal pressure of the container and the passage flow rate (thru
The rubber-elastic adjustment member causes the flow-flow clot of the delivery duct in the region of at least one throttle duct forming a part of the delivery duct so as to keep the gh flow substantially constant.
The flow-regulating valve (flow-regulating) that suppresses the gradual decrease of the loss-section due to the decrease of the internal pressure by the rubber elasticity adjusting member.
valve).

[0002]

BACKGROUND OF THE INVENTION Known flow control valves of this type (flow).
Regulating valve) [EP 2347
No. 97 B1], the adjusting member is formed of a rubber disk having an axial center hole forming the throttle duct and a recess on the side closer to the valve seat. When the internal pressure in the container is high, the rubber disc is compressed in the radial direction and the flow cross section of the hole is narrowed. As the internal pressure decreases, the holes shrink correspondingly and the flow cross section increases. The through flow is
Since it is a function of internal pressure and flow cross section, this flow rate remains substantially constant regardless of internal pressure. However, rubber elastic materials are often included in such containers, such as aerosol cans or spray cans, and thus have the property of expanding when contacted with some fluids, such as grease-containing fluids or oily fluids. Furthermore, the normal dimensions of rubber elastic parts cannot maintain precise tolerances during manufacture, aside from the fact that these parts are temperature dependent and change over time due to aging phenomena. However, since the flow cross section is kept extremely small, for example, about 0.2 mm ² so as to prevent unnecessary consumption of the product contained in the container, the passing flow rate is accurately maintained by the nominal dimension of the adjusting member. (Nomin
to a large extent.

The invention is based on the problem of providing a flow regulating valve as described above, in which the flow rate of passage is maintained with high accuracy.

According to the invention, the problem is that the throttle duct is bounded by the groove in the valve seat and the adjusting member (d).
solved by defining.

In this solution, the throttle duct is delimited largely by the groove and by only a small part by the rubber elastic adjusting member. If the groove is made of a hard material that can be made with a narrower dimensional tolerance than the rubber elastic member and that does not expand and causes a slight aging phenomenon, the entire flow-flow cross-s of the throttle duct can be obtained.
section) can be held more accurately than the cross section of the hole of the rubber elastic material. Correspondingly, the through-flow can also be set and maintained very accurately so that the consumption of the product contained in the container is limited as much as possible, substantially independent of pressure fluctuations in the container. Can be The rubber elasticity adjusting member is strongly or weakly pressed into the groove so as to keep the flow rate constant according to the internal pressure.

The valve seat may be formed by the connecting shoulder surface of the dip tube. The connecting portion is provided on the housing of the delivery valve. This configuration requires only minor modifications to the conventional delivery valve on the spray can.

Alternatively, the valve seat may be formed by the shoulder surface of the portion of the delivery duct that extends through the operative mounting of the delivery valve for the container. This construction does not require any modification of the conventional delivery valve, but it does require conventional actuating accessories.
ng fitment) requires only minor changes.

The valve seat may be formed by a substantially conical shoulder surface. In this case, the alignment of the adjusting member having the corresponding shape can be automatically performed.

That is, the surface of the adjusting member that cooperates with the valve seat can be formed by at least a part of a spherical surface or a conical surface. The spherical surface has the advantage that the contact surface area between the valve seat and the adjusting member is correspondingly small, so that the pressure required to deform the adjusting member to define the flow cross section of the throttle duct is also correspondingly low. To have. On the contrary, the conical surface has the advantage that it is made easier.

In this case, the spherical surface is formed by a part of the surface of a spherical section having a flat surface which forms each one of the bottom surfaces of the cylinder. The outer diameter of the cylinder is somewhat smaller than the inner diameter of the portion of the delivery duct located around the cylinder. In this way, these cylinders additionally guide the adjusting member in the delivery duct without disturbing the flow through.

The bottom of the cone also simultaneously forms the bottom of the cylinder. The outer diameter of this cylinder is somewhat smaller than the inner diameter of the part of the delivery duct which is arranged around this cylinder. In this configuration, too, the cylinder does not impede the flow rate through it, which gives an additional guiding effect.

The at least one narrow bypass duct then delivers the region of the container containing the compressed gas upstream of the regulating member through the housing of the valve and into communication with the duct.
The narrow bypass duct delivers the compressed gas contained in the container and mixes with the effluent product when the valve is opened, and this construction results in still less product consumption when the delivery valve is opened and the container sprays. Allows the product to be more finely distributed in drops as it exits the head.

If the bypass duct ends eccentrically in the vortex chamber through the delivery duct, then the product and compressed gas are mixed even better.

The present invention will now be described in more detail with reference to the accompanying drawings.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT As shown in FIGS. 1 and 2, a delivery valve housing 1 is fixedly inserted into a valve support 2. The valve support 2 forms the upper part of the top of the container that holds the product that flows and is exposed to gas pressure. The sealing between this top and the valve support 2 is provided by a rubber seal 3. Valve housing 1
Is provided by a peripheral wall 4 on the inside of the valve support 2 in the radial direction.
It is fixed inside. The peripheral wall 4 is provided at a plurality of peripheral locations with inwardly-pushed protrusions 5 which engage the underside of the flange 6 of the valve housing 1. Due to this structure, the clamping edge 7 provided on the top side of the valve housing 1 has a rubber elastic sealing disc [rubber-elast] on the end wall 9 of the valve support 2.
ic sealing disc] 8 is pressed. The hollow valve stem 10 engages through the central hole of the rubber elastic sealing disc 8. The peripheral portion of this hole is pressed against and supported by the constricted portion or constricted portion 12 of the valve rod 10. A lateral hole 13 that communicates with the internal cavity of the valve rod 10 is formed in the compressed portion 12. Actuating accessories for valves with spray nozzles or similar (a
The cacting fitting can be attached to the valve stem 10 in a conventional manner. The valve rod 10 is biased upward by a spring 14. Cavity 15 that receives the spring 14
Communicates with the interior of the container by a duct 16 extending through the connecting portion 17 so as to attach a dip tube 18. Valve stem 1
0 is a rubber elastic sealing disk 8 when pushed down by an operating accessory.
The peripheral portion of the inner hole is bent downward by the pressing portion 12. Therefore, the lateral hole 13 is exposed, and the delivery duct that opens from the inside of the container to the outside through the connecting portion 17, the cavity 15, the lateral hole 13 and the cavity in the valve rod 10 opens.

Between the peripheral wall 4 of the valve support 2 and the peripheral wall of the housing 1, an annular flexure space 19 and a flexure space 19 for the material of the rubber elastic sealing disk 8 are connected, and this flexure space is connected to the housing 1 There remains a filling duct 20 which communicates with the inside of the container on the outside of. A central hole is provided in the end wall 9 and an annular filling hole 21 exists around the valve rod 10.

In the filling operation, the fluid to be introduced enters the inside of the container not only through the cavity of the valve rod 10 but also through the filling hole 21. In this state, the filling pressure compresses the rubber elastic sealing disk 8 in the axial direction in the tightening area, and pushes the rubber elastic sealing disk 8 into the flexible space 19. Therefore, a clearance is exposed between the rubber elastic sealing disk 8 and the end wall 9 and the peripheral wall 4, and the fluid to be introduced can flow into the container through this clearance. Further fluid to be introduced can also be introduced by the delivery duct when the delivery valve is opened.

The duct 16 of the connecting portion 17 is also provided with a flow rate adjusting valve. The flow regulating valve has a valve seat 22 in the form of a conical shoulder surface at the connecting part 17. The valve seat 22 includes an adjusting member 24 extending in the flow direction and made of a rubber elastic material.
There is also provided a groove 23 which delimits, or delimits, the throttle duct. The surface of the adjusting member 24 cooperating with this valve seat is formed by part of the surface of the spherical area. The flat surface of this area forms one of the bottom surfaces of the cylinders 25, 26, respectively. Each cylinder 25, 2
The outer diameter of 6 is somewhat smaller than the inner diameter of the portion of the delivery duct located around cylinder 25 or cylinder 26. When the adjusting member 24 is introduced into the connecting part 17, the adjusting member is pushed over a radially inwardly projecting obliquely cut fixed projection formed inside the axial rod part 28. . The rod portions 28 are separated from each other by a slot 29.

The adjusting member 24 is omitted from the drawing below FIG. 2 in order to simplify the drawing.

When the delivery valve is opened by pushing down the valve stem, the adjusting member 24 is moved to the valve seat 22 by the product or fluid flowing out under the gas pressure obtained in the container as shown in FIG. Immediately pressed, the groove 23 and the adjusting member 24
Product flow rate (flo through the throttle duct defined by
w) is narrowed down. At the beginning of the venting operation, the container still has a high gas pressure when it is still full. In this case, the rubber elastic material of the adjusting member 24 is used as the groove 23.
Partially pushed in, the point of contact between the valve seat 22 and the adjusting member 24 substantially narrows the throttle duct, correspondingly producing a smaller quantity of product. If the gas pressure drops during the discharge of the container, the pressure applied to the adjusting member 24 also drops and the adjusting member 24 enters the groove 23 more shallowly, and the flow cross section of the throttle duct increases slightly. In this way, this construction guarantees an economical consumption of the product, the flow rate of the product through the throttle duct remaining substantially constant regardless of the internal pressure in the container.

The housing 1 is made of a material relatively hard as compared with the rubber elastic material of the adjusting member 24, for example, a plastic material or a metal. Groove 23 can therefore be made with relatively close dimensional tolerances. In this case, the dimensions of the groove 23 are less dependent on temperature or aging. Obviously, the dimensions of the rubber elasticity adjusting member 24 are only held to a greater tolerance and are more strongly temperature dependent and more strongly subject to changes caused by aging. However, since the throttle duct is formed by only a small portion of the surface of the adjusting member 24, the throttle duct is more accurately held and more temperature dependent than the throttle duct defined by the rubber elastic material over the entire periphery. Low and less susceptible to changes caused by aging. Valve seat 2
The conical surface of 2 cooperates with the spherical surface of the adjusting member 24 to form the valve seat 2
The centering action of the adjusting member 24 in 2 occurs and the adjusting member 24 hits the valve seat 22 over its entire circumference in a sealed state except for the groove 23, and the respective cylinders 25 and 26 deliver the adjusting member 24 in the duct. It acts as a guide and the annular space surrounding them allows the product to flow without resistance.

As soon as the delivery valve is no longer actuated, ie the valve stem 10 is no longer pushed down, the spring 14 urges the valve stem 10 rearwardly to the position shown in which the delivery valve is closed and then adjusted. The member 24 is lowered by its own weight until it hits the fixing projection 27.

FIG. 3 shows a modification of the flow rate adjusting valve shown in FIG. In this modification, a ball-shaped adjusting member 24a is provided instead of the adjusting member 24. Everything else is the same as the embodiment shown in FIG. Therefore, FIG. 3 shows only the housing 1 with the flow regulating valve. The operation system of the flow control valve illustrated in FIG. 3 also corresponds to the operation system of the flow control valve shown in FIG.

The modification shown in FIG. 4 also differs from the embodiment shown in FIG. 1 only in the adjusting member 25b having the cone 30.
The bottom surface of the cone 30 simultaneously forms the bottom surface of the cylinder 26.
The outer diameter of the cylinder 26 is smaller than the portion of the delivery duct arranged around the cylinder 26. The operation method of the flow rate adjusting valve also corresponds to the operation method of the flow rate adjusting valve illustrated in FIG.

The modification shown in FIGS. 5 and 6 is different from the embodiment shown in FIG. 1 in that the housing portion 1a extending the housing 1 is fitted into the connecting portion 17 of the housing 1 by press fitting, and the dipping pipe 18 Connected part 1 by press fitting
The only difference is that it has 7a. Housing part 19
In this case comprises an intermediate wall 31 with a through hole 32, the substantially cup-shaped insert 33 being adapted to the lower end of the connecting part 17 and the intermediate wall 3.
It is inserted between 1 and 1. The insert 33 has, on its lower side, a spiral chamber 34 which communicates with an annular space 36 by means of a narrow groove 35 which opens tangentially in the spiral chamber. The annular space 36 is
A groove 37 in the peripheral wall of the housing part 1a communicates with the region inside the container filled with compressed gas. A coaxial bore 39 also extends through the bottom 38 of the insert 33 and is aligned with the vortex chamber winding 34 and the bore 32. The lower groove 35 of the insert 33 is closed below by the intermediate wall 31. Each groove 35, together with the annular space 36 and the groove hole 37, forms a narrow bypass passage. Through this bypass passage, the compressed gas enters the swirl chamber 34, flows tangentially to the swirl chamber and mixes with the product exiting through the holes 32 during actuation of the delivery valve, which product is divided into fine particles. It In this way, an additional throttling effect is obtained on the delivery duct, resulting in an even more economical consumption of the product.

The embodiment shown in FIGS. 7 and 8 is different from the embodiment shown in FIG. 1 only in that the housing 1 has a minute hole 40 on its side wall upstream of the flow rate adjusting valve. Each hole 40 forms a narrow bus-pass duct that extends radially through this sidewall to extend into the duct and discharge compressed gas which mixes with the product upstream of the throttle duct.

The embodiment shown in FIGS. 9 and 10 is shown in FIGS.
The difference from the embodiment shown in FIG. 1 is that the shoulder of the housing 1 adjacent to the connecting part 17 has a radial groove 41 and the outside of the connecting part 17 has a narrow axial groove 42. Each groove 42 is aligned with the radial groove 41 and is closed by the dip tube 18 except at each end,
In this way, a narrow (ultrafine) bypass duct as well as the hole 40 is formed.

The embodiment shown in FIGS. 11 and 12 differs from the embodiment shown in FIGS. 5 and 6 only in the following points.
That is, the housing 1b has a single-piece structure and does not include a flow rate adjusting valve. On the contrary, the flow regulating valve is fitted in a cap-shaped actuating accessory 43 for actuation of the delivery valve, in particular in a connecting part 45 formed in the end part 44 of the actuating accessory 43 made of hard plastic material or metal. There is. Valve stem 10
The upper end portion of is inserted into the connecting portion 45 by press fitting. The conical valve seat 22 of the connecting part 45 is provided with a plurality of grooves 23 which together with the adjusting member 24 form an adjustable throttle duct. A plurality of axial grooves 46 are provided on the cylinder 26 of the adjusting member 24 and are distributed over the periphery of this cylinder. A radial hole 47 downstream of this flow regulating valve leads to the part of the delivery duct defined by the connecting part 45. The radial holes 47 end in an annular groove 48. A substantially cup-shaped nozzle insert 49 is slip fit in the annular groove 48. Nozzle insert 49
Also, on the inner side in the radial direction of the end portion, an annular space 51
It has a vortex winding chamber 50 communicating with the hole 37 by each tangential duct and each hole leading to the. Also, at the bottom of the spiral chamber 50,
A coaxial hole 52 is provided to form the discharge nozzle. The mode of operation is the same as in the embodiment illustrated in FIGS.

The embodiment shown in FIGS. 13 and 14 corresponds to FIG.
Compared with the embodiment illustrated in FIGS. 12 and 12, the only difference is that instead of the adjusting member 24, only the adjusting member 24b and one groove 23 are provided. The nozzle insert 49 fitted in the annular groove 48 is omitted from FIG. 13 for simplicity of the drawing.

The embodiment shown in FIG. 15 differs from the embodiment shown in FIGS. 13 and 14 only in that an adjusting member 24a is provided instead of the adjusting member 24b.

[Brief description of drawings]

1 is an axial cross-section of a delivery valve with a flow control valve according to the invention in the valve support of a spray container (not shown) in the form of a spherical section with an axial extension in the form of a cylinder. is there.

2 is a bottom view of the housing of the delivery valve shown in FIG. 1. FIG.

FIG. 3 is an axial cross-sectional view of the housing of the delivery valve shown in FIGS. 1 and 2 having a ball-shaped adjustment member.

4 is an axial sectional view of the housing of the delivery valve shown in FIGS. 1 and 2 with a conical and cylindrical shaped adjusting member formed on the bottom surface.

5 is an axial cross-sectional view of the modified flow control valve of FIG. 1 including an insert body having a spiral chamber.

FIG. 6 is a bottom view of the insert shown in FIG.

7 is an axial cross-sectional view of a modification of the valve housing shown in FIG.

8 is a bottom view of the valve housing shown in FIG. 7. FIG.

9 is an axial cross-sectional view of the valve housing shown in FIG.

10 is a bottom view of the valve housing shown in FIG. 9. FIG.

FIG. 11 is an axial cross-sectional view of another embodiment of the flow control valve of the present invention inserted into the working accessory of the delivery valve.

12 is a bottom view of the actuation accessory shown in FIG. 11. FIG.

13 is an axial cross-sectional view of a modification of the actuation accessory shown in FIG.

14 is a bottom view of the actuating accessory shown in FIG. 13. FIG.

FIG. 15 is an axial cross-sectional view of a modification of the actuation accessory shown in FIG.

[Explanation of symbols]

8, 13 Delivery valve 22 Valve seat 22, 23, 24, 24a, 24b Flow rate adjusting valve (throttle duct) 24, 24a, 24b Rubber elastic adjusting member 23 Groove 23, 24, 24a, 24b Throttle duct

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-3-256879 (JP, A) Actual development Sho 55-58983 (JP, U) Japanese Patent Sho 31-10488 (JP, B1) Japanese Patent Sho 51- 31964 (JP, B2) Actual public 63-1119 (JP, Y2) Actual public 58-27986 (JP, Y2)

Claims (8)

(57) [Claims] 1. A flowable product exposed to gas pressure,
A flow control valve for a container, comprising a delivery valve (8, 13) in a delivery duct, wherein the product flows out through the delivery duct when the delivery valve is opened,
A valve seat (22) made of a hard material and a rubber elastic adjusting member (24; 24a; 24b) are provided in the delivery duct, and the rubber elastic adjusting member is configured to open the delivery duct when opening the delivery duct. At least one throttle duct (a part of the delivery duct) formed by the rubber elasticity adjusting member is biased by the internal pressure of the container against the valve seat to keep the passing flow rate substantially constant. 23, 24, 24
a, 24b), the flow cross-section of the delivery duct is suppressed by the rubber elasticity adjusting member from gradually decreasing with the decrease of the internal pressure.
23, 24, 24a, 24b), the throttle duct is defined by the groove (23) in the valve seat and the rubber elasticity adjusting member (24; 24a; 24b) to define the valve seat (22). A flow control valve characterized by being formed by a substantially conical shoulder surface. 2. The shoulder surface is provided on a connecting part (17) for a dip tube (18) and the connecting part is provided on a housing (1) of the delivery valve. Flow control valve. 3. A flow regulating valve according to claim 1, characterized in that said shoulder surface is provided on a part of a delivery duct which passes through an operating accessory (43) of the delivery valve for said container. 4. The surface of the rubber elasticity adjusting member (24; 24a; 24b) cooperating with the valve seat (22) is formed by at least a part of a spherical surface or a conical surface. 1 flow control valve. 5. The spherical surface is formed by a part of the surface of a spherical section, the flat surface of the spherical section forming one of the bottom surfaces of each cylinder (25; 26), respectively. 25; 26), the outer diameter of which is slightly smaller than the inner diameter of a portion of the delivery ducts arranged around these cylinders. 6. A portion of the delivery duct in which the base surface of the cone simultaneously forms the base surface of a cylinder (26) and the outer diameter of the cylinder (26) is arranged around the cylinder (26). The flow control valve according to claim 4, wherein the flow control valve is slightly smaller than the inner diameter of the. 7. At least one narrow bypass duct (35, 36, 37; 40; 41, 42) for compressing gas in the container upstream of the rubber resilience adjusting member (24) with respect to the delivery duct. The flow control valve according to any one of claims 1 to 6, characterized in that a region including the above is communicated through the housing (1; 1a; 1b) of the delivery valve. 8. The bypass duct (35, 36, 3)
7) is a spiral chamber (34) which penetrates the delivery duct.
8. The flow rate control valve according to claim 7, wherein the flow control valve ends eccentrically.