KR20040071484A - Over pressure safety apparatus of aerosol cans - Google Patents

Abstract

PURPOSE: An overpressure safety of an aerosol receptacle is provided to prevent explosion of the aerosol receptacle by installing a safety valve to a sub-housing and to keep the outside of the aerosol receptacle clean. CONSTITUTION: In an aerosol receptacle, a housing(30) is fastened to a mounting cap(10) assembled to the upper part of a receptacle body(2) and a valve stem(20) elastically supported via a spring(40) is fastened to the inside of the housing. An opening and shutting seal(50) is inserted between the upper end of the housing and the mounting cap, to open and shut an orifice(23) formed to the valve stem and to adjust the entrance and exit of a fluid in the receptacle. In an overpressure safety of the aerosol receptacle, a main receiving groove(31) in which the valve stem and the spring are built in, and a fluid inlet(32) communicating with the main receiving groove are each formed to the center of the housing. A sub-housing(60) with a relief hole(61) is integrally formed on a side of the housing. A sub-receiving groove(62) is formed to the inner upper part of the sub-housing. The bottom of the sub-receiving groove communicates with the relief hole and the upper end of the sub-receiving groove communicates with a discharge hole(12) formed to the mounting cap. A safety valve(70) selectively opening and shutting the relief hole according to the internal pressure of the aerosol receptacle is built in the sub-receiving groove.

Description

Over pressure safety apparatus of aerosol cans

The present invention relates to an overpressure safety device built in an aerosol container. In particular, when the external temperature is increased and the pressure in the aerosol container is excessively high, the overpressure gas in the aerosol container is ejected through a safety valve to prevent the aerosol container from exploding. To overpressure safety devices for aerosol containers

In general, an aerosol container filled with contents, such as a hairspray or a spray insecticide container, ejects the contents to the outside by using the pressure in the container and has a common feature that a predetermined pressure or more is always in the container.

Here, the contents filled in the container is composed of a functional liquid and a liquefied gas for injection that pressurizes the functional liquid, wherein the liquefied gas for injection is a gas which is separated from the liquid and collected in the upper layer of the container in addition to the gas collected in the functional liquid. Is done. Hereinafter, for convenience of description, the functional liquid and the injection liquefied gas dissolved therein will be referred to as a liquid, and the injection liquid liquefied gas which is not dissolved in the liquid and filled into the container will be referred to as a gas.

If the aerosol container as described above is elevated in internal pressure at high temperatures, there is always a risk of deformation and rupture of the container, which may cause a safety accident. For example, if the container is exposed to heat during a long time under direct sunlight or abnormally high temperature in the container increases excessively the internal pressure of the container, a safety accident that causes the container to explode frequently occurs.

As shown in Figure 1a to 1c, the general aerosol container as described above, the mounting cap 101 is fastened to the upper portion of the aerosol container 100, the fastening portion protruding in the center of the mounting cap 101 The valve stem 103 and the housing 104 are fastened to the inside thereof, and a spring 105 for elastically supporting the valve stem 103 upward is seated in the housing 104. The outer periphery of the opening and closing seal 106 is closely fixed between the upper end of the) and the fastening portion 102 of the mounting cap 101.

In addition, the liquid outlet 107 is formed in the upper side of the valve stem 104, an annular recess 108 is formed on one side of the outer peripheral surface, the orifice 109 in the center of the recess 108 ) Is formed so that the inner edge of the opening and closing seal 106 is in close contact with the inside of the concave inlet 108 to selectively open or close the orifice 109 according to the external force to discharge or block the liquid in the container 100. It is.

The aerosol container is always above a certain pressure in order to eject the liquid, the internal pressure is increased when the external temperature is high, there is a risk of deformation and rupture of the container there is always a risk for safety accidents.

In the overpressure safety device of the conventional aerosol container for preventing the above-mentioned risk, as shown in Figure 2a, the housing 202 and the valve stem 203 embedded in the housing 202 in the center of the mounting cap 201, respectively The overpressure safety spring 204 and the support spring 205 are respectively seated in the housing 202 to support the valve stem 203 and the locking jaw 202a of the housing 202. The seal 206 and the spring sheet 207 are laminated in this order.

Here, the opening and closing seal 206 is fitted in close contact with the inner periphery of the concave portion 203a of the valve stem 203 to open and close the liquid flow to the orifice 208, the spring seat 207 is a valve While being inserted into the outer circumference of the stem 203, the lower end of the overpressure safety spring 204 is abutted to close the opening / closing seal 206 in the direction of the locking step 202a.

In the conventional safety device configured as described above, when an external force is applied to discharge (or fill) the liquid in the container 200, as shown in FIG. 2B, the valve stem 203 is lowered, and thus the support spring 205. ) Is compressed and the orifice 208 blocked by the opening and closing seal 206 is opened so that the liquid (gas) in the container 200 can be discharged (filled) in the direction of the arrow (the opposite direction).

On the other hand, when the internal pressure of the container 200 is greater than the elastic force of the overpressure safety spring 204, as shown in Figure 2c, the overpressure safety spring 204 is compressed and at the same time the valve stem 203 is raised, thereby opening and closing the seal ( 206 is spaced apart from the locking jaw 202a, and the overpressure liquid passing through the spaced gap is discharged to the upper liquid outlet 210 through the inner part of the housing 202, so that the internal pressure of the container 200 is lowered, so that the container 200 ) Will prevent rupture.

However, the conventional overpressure safety device as described above has a structure in which liquid flows only through the orifice 208 which is a microhole when filling gas into the container 200 (in the opposite direction to the arrow in FIG. 2B). There is a problem that the filling efficiency is significantly lower than in the filling structure (see Fig. 1c) of the general container 100 without the overpressure safety device.

In addition, since the locking tube 211 connected to the bottom of the housing 202 and discharging the liquid is always locked in the liquid, the liquid flows out of the container 200 when the overpressure is applied in the state of FIG. 2A in which the container 200 is not used. There was a problem that the leaked and dirty container 200 and its surroundings.

On the other hand, the conventional overpressure safety device has a structure for discharging the overpressure gas by moving the valve stem 203 built in the housing 202, so that the length of the valve stem 203 and the housing 202 will be longer In addition, there is a problem that the cost of the assembly parts due to the size of the overpressure safety spring 204, etc. significantly increased.

The present invention has been made in order to solve the above problems, to form a sub-housing having a discharge passage on one side of the housing, the safety valve is mounted on the sub-housing when the internal pressure of the aerosol container is excessively high. It is an object of the present invention to provide an overpressure safety device for an aerosol container which is operated to discharge the gas filled in the upper part of the container to prevent the explosion of the container and to maintain the clean state outside the container.

Another object of the present invention is that when the safety valve is opened and the overpressure gas is partially discharged and the internal pressure of the container is lowered below a certain value, the safety valve is returned to its original state to prevent the release of unnecessary gas, thereby preventing reuse of the gas. To make it work.

Another object of the present invention is to install a safety valve in the sub-housing formed integrally with the housing without changing the existing automatic filling structure at all, reducing the cost or manufacturing cost, aerosol without the existing safety device The assembly line of the container can be used almost as it is, so that it can be easily adopted at the assembly site, and the cost of the parts assembled to the safety valve is also significantly reduced compared to the cost of the existing safety device structure.

Figure 1a is a longitudinal sectional view showing a typical aerosol container,

Figure 1b is a longitudinal sectional view showing a state of use of a typical aerosol container,

Figure 1c is a longitudinal cross-sectional view showing a state of filling the gas into a typical gas fuel container,

Figure 2a is a longitudinal sectional view showing the overpressure safety device of a conventional gas fuel container,

Figure 2b is a longitudinal sectional view showing a state of discharging liquid from the container in Figure 2a,

Figure 2c is a longitudinal sectional view showing an operating state during the overpressure action in the overpressure safety device of a conventional gas fuel container,

Figure 3a is a longitudinal sectional view showing the overpressure safety device of the aerosol container according to the present invention,

Figure 3b is a longitudinal cross-sectional view showing an operating state below the specified pressure in the overpressure safety device of the aerosol container according to the present invention,

Figure 3c is a longitudinal cross-sectional view showing a state of filling gas into the aerosol container in the present invention,

Figure 3d is a longitudinal cross-sectional view showing the action according to the overpressure of the overpressure safety device of the aerosol container according to the present invention,

Figure 4 is an exploded perspective view of a part of the overpressure safety device of the aerosol container according to the present invention,

5A and 5B illustrate another embodiment of the present invention as shown in FIGS. 3A and 4.

Explanation of symbols on the main parts of the drawings

1: container 2: container body

10: mounting cap 11: fastening part

12: discharge hole 13: alignment jaw

20: valve stem 21: liquid outlet

22: indentation 23: orifice

30: housing 31: main receiving groove

32: liquid inlet 33: liquid suction pipe

40: spring 50: opening and closing seal

60: sub-housing 61: relief ball

62: Sub receiving groove 63: Seat

63a: circular projection 64: balance weight

65: circular forest 66: arm

70: safety valve 71: opening and closing member

71a: support portion 72: elastic member

73: sealing ring

Safety device of the present invention for achieving the above object, the housing and the valve stem is fastened to the mounting cap assembled on the top of the container body, respectively, the opening and closing seal is inserted between the upper end of the housing and the mounting cap valve stem Opening and closing the orifice formed to control the liquid in the container, the housing is formed in the center of the main receiving groove and the liquid inlet communicating with the receiving groove and the valve stem and the spring is built, respectively, one side of the housing The sub-housing having a relief hole in the body is integrally formed, and a sub-receiving groove in which a bottom surface communicates with the relief hole and an upper end communicates with a discharge hole formed in the mounting cap is formed on the inner upper portion of the sub-housing, With a safety valve in the groove for selectively opening and closing the relief ball in accordance with the internal pressure of the container It characterized.

The safety valve is mounted on the bottom of the sub-receiving groove, the opening and closing member for opening and closing the relief ball, an elastic member such as a coil spring that is embedded in the sub-receiving groove, the lower end is placed on the opening and closing member, and the upper end of the sub-receiving groove Built-in is configured to include a sealing ring inserted between the top and the mounting cap of the elastic member.

A support part is formed on an upper surface of the opening / closing member so that the lower end of the elastic member is fitted on the outer circumference thereof to prevent deformation in the transverse direction.

Meanwhile, at least one balance weight having the same shape as the sub-housing and symmetrical to each other is integrally formed on one side of the housing.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Figure 3a is a longitudinal cross-sectional view showing the overpressure safety device of the aerosol container according to the present invention, Figure 3b is a longitudinal cross-sectional view showing an operating state under a specified pressure in the overpressure safety device of the aerosol container according to the invention, Figure 3c Figure 3d is a longitudinal cross-sectional view showing a state filling gas into the aerosol container, Figure 3d is a longitudinal cross-sectional view showing the action according to the overpressure of the overpressure safety device of the aerosol container according to the present invention, Figure 4 is the overpressure safety of the aerosol container according to the present invention Partly exploded perspective view of the device.

As shown in the figure, in the overpressure safety device of the present invention, the mounting cap 10 is fastened to the upper portion of the body 2 of the aerosol container 1 filled with the functional liquid and the injection liquefied gas therein, the mounting cap The valve stem 20 and the housing 30 are fastened to an inner side of the fastening part 11 protruding from the center of the center portion 10, and the valve stem 20 is elastically supported upward in the housing 30. The spring 40 is coupled, and the outer periphery of the opening and closing seal 50 is tightly fixed between the upper end of the housing 30 and the fastening part 11 of the mounting cap 10.

The housing 30 has a main accommodation groove 31 in which the valve stem 20 and the spring 40 are built in the central portion thereof, and a liquid inlet 32 communicating with the main accommodation groove 31, respectively. The liquid inlet pipe 33 is detachably coupled to the tip of the liquid inlet 32.

Here, the liquid filled in the container 1 is lowered in accordance with the use, the liquid inlet pipe 33 can effectively suck out the liquid until the remaining amount of liquid in the container (1) can be discharged. The length is close to the bottom of the container (1) so that it is combined.

A sub housing 60 having a relief hole 61 is integrally formed on one side of the housing 30, and a bottom surface of the sub housing 60 communicates with the relief hole 61 and an upper end thereof. A sub receiving groove 62 is formed in communication with the discharge hole 11 formed in the mounting cap 10, and the relief hole 61 is formed in the sub receiving groove 62 according to the internal pressure of the container 1. There is a built-in safety valve 70 for selectively opening and closing.

The discharge hole 12 formed in the mounting cap 10 is for discharging the overpressure gas in the container 1 to the outside. In the past, a progressive dieset includes a plurality of processes such as drawing and cutting; (Not shown), and the discharge hole 12 can also be formed simply by installing a perforator (not shown) without large design changes to the existing progressive die set.

The valve stem 20 has an upper portion penetrated through the mounting cap 10 and inserted into the fastening portion 11, and a lower portion thereof is embedded in the housing 30 and is elastically supported upward through the spring 40. The liquid discharge port 21 is formed inside the upper side.

In addition, an annular recess 22 is formed at one side of the valve stem 20 outer circumferential surface, and an orifice 23 is formed at the center of the recess 22 in the horizontal direction, so that the opening / closing seal 50 is formed. The inner edge portion is fitted in close contact with the indentation portion 22 so as to block the liquid discharge to the orifice 23.

On the other hand, the sub-housing 60 has a relief hole 61 is formed in the lower inner side, the bottom surface is in communication with the relief hole 61 on the inner upper portion of the sub-housing 60 and the upper end of the mounting cap 10 Sub receiving groove 62 is formed in communication with the discharge hole 12 formed in the.

On the other hand, the sub-receiving groove 62 of the sub-housing 60 has a safety valve 70 is built, so that when the internal pressure of the aerosol container 1 is higher than the set pressure is opened and can be closed when the set pressure is below the set pressure. have.

The safety valve 70 is seated on the bottom of the sub receiving groove 62, the opening and closing member 71 for opening or closing the relief hole 61, and the lower end of the safety valve 70 is built in the sub receiving groove 62 An elastic member 72 seated on the opening / closing member 71 and a sealing ring 73 inserted between the upper end of the elastic member 72 and the mounting cap 10 while being embedded in the upper end of the sub receiving groove 62. It consists of

The elastic member 72 for opening and closing the relief hole 61 is preferably made of a material that can be stretched in the longitudinal direction, such as a spring, using a cylindrical coil spring that is easy to design and manufacture, such as the selection of elastic modulus in the spring. More preferred.

The opening and closing member 71 has a smooth bottom and a support portion 71a protrudes on the upper surface, and the lower end of the cylindrical coil spring, which is an elastic member 72, is supported on the outer circumference of the support portion 71a so that the compression force in the longitudinal direction is supported. The spring is prevented from being deformed laterally.

In the seat surface 63 which is the bottom surface of the sub housing 60 of the sub housing 60, a circular protrusion 63a having an inner diameter larger than the inner diameter of the relief hole 61 is formed in the circumferential direction, so that the elastic member ( When closing the relief hole 61 through 72, the elastic member 72 is in close contact with the circular projection (63a) and the seat surface 63 is to increase the sealing effect.

The sealing ring 73 fastened between the upper end of the elastic member 72 and the mounting cap 10 is made of a deformable elastic material such as rubber, and when pressure is applied from the spring 40 which is the elastic member 72. While deforming, the upper end of the housing 30 and the mounting cap 10 are sealed to prevent leakage of high pressure liquid.

The lower end of the sealing ring 73 is in contact with the upper end of the spring 40, which is an elastic member 72 is to be in close contact with the inner edge surface of the discharge hole (12).

In the seat surface 63 which is the bottom surface of the sub housing 60 of the sub housing 60, a circular protrusion 63a having an inner diameter larger than the inner diameter of the relief hole 61 is formed in the circumferential direction, so that the elastic member ( When closing the relief hole 61 through 72, the elastic member 72 is in close contact with the seat surface 63 to enhance the sealing effect.

One side of the housing 30 has one or more balance weights 64 having the same shape as the sub-housing 60 and are integrally molded while being symmetric to balance the mass of the housing 30 and the sub-housing 60. It is possible to achieve.

Here, the housing 30, the sub-housing 60 and the balance weight 64 are injection molded integrally with each other as a synthetic resin material.

On the other hand, the alignment jaw 13 is formed on the outside of the discharge hole 12 formed in the mounting cap 10 to guide the assembly of the sub-housing 60 and the balance weight 64, the assembled sub-housing ( 60 and the position of the balance weight 64 can be prevented from changing.

Operation of the overpressure safety device according to the present invention made as described above is made as follows.

First, a process of discharging or blocking the liquid in the aerosol container 1 will be described.

As shown in FIG. 3B, when the valve stem 20 is pressed downward by applying an external force in the direction of the arrow to discharge the liquid from the aerosol container 1, a spring 40 for elastically supporting the valve stem 20 is provided. Simultaneously with the compression, the orifice 23 of the valve stem 20 is opened while the inner periphery of the opening and closing seal 50 is bent.

Accordingly, the liquid filled in the aerosol container 1 is in the direction of the arrow, that is, the liquid suction pipe 33, the liquid inlet 32, the main accommodation groove 31, the orifice 23, and the liquid outlet 21. Will be discharged through sequentially.

Next, the process of filling the liquefied gas, that is, the gas for injection into the container 1 is performed in the reverse direction of the liquid discharge process as shown in FIG. 3C.

Herein, the filling mechanism will be described in detail. About 20% of the gas filled in the container 1 is filled through the liquid discharge path, and the remaining 80% of the liquid is fastened to the mounting cap 10. And is charged between the housing 30 and the main accommodation groove 31, thereby reducing the charging efficiency caused by the overpressure safety device.

When the external force acting on the valve stem 20 is removed in the process of discharging (or filling) the liquid as described above, the compressed spring 40 is extended by the restoring force and the valve stem 20 protrudes as shown in FIG. 3A. After returning to the original position, the opening and closing seal 50 is also opened to its original state and the orifice 23 of the valve stem 20 is closed again to block the discharge (charge) of the liquid (gas).

On the other hand, when the internal pressure of the aerosol container (1) is greater than the prescribed value, that is, the spring elastic force of the safety valve 70, as shown in Figure 3d, the gas acting on the opening and closing member 71 through the relief hole 61 below The pressure compresses the spring, which is the elastic member 72, so that the opening and closing member 71 is also spaced apart from the seat surface 63.

At the same time, the overpressure gas collected in the upper layer of the aerosol container 1 is, as indicated by the arrow, a gap between the relief hole 61, the opening / closing member 71 and the seat surface 63, and the sub accommodation groove 62. ) And is discharged to the outside while sequentially passing through the discharge hole 12, thereby lowering the pressure inside the container (1) to prevent breakage of the aerosol container (1) due to overpressure.

Next, when the internal pressure of the aerosol container 1 again falls below the prescribed value, as shown in FIG. 3B, the spring, which is the compressed elastic member 72, is extended by the restoring force, and the opening and closing member 72 returns to its original position. While being seated on the seat surface 63 of the sub-housing 60.

Accordingly, the opening and closing member 72 closes the relief hole 61 again to block the discharge of the gas, and the container 1 is again in a safe state, that is, the state of FIG. 3A is maintained.

The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea of the present invention.

For example, FIG. 5 shows another embodiment of the sub-housing 60. A circular rim 65 having a concentric circle with the main accommodating groove 31 is formed integrally outside the sub-housing 60. Rim 65 and housing 30 are connected by a plurality of arms 66 to reinforce circular rim 65.

Here, the circular rim 65 and the arm 66 is preferably manufactured by selecting the thickness and number of the sub-housing 60 to achieve a mass balance.

According to the overpressure safety device of the present invention made as described above, when the internal pressure of the aerosol container is higher than the predetermined pressure to eject the gas gathered in the upper layer prior to the deformation pressure of the aerosol container to prevent deformation and explosion of the container. In addition, it is possible to prevent a decrease in fuel charging efficiency as in the conventional method generated by the safety valve is provided.

In addition, the gas discharged through the safety valve is a non-liquid gas, and the gas discharged in this way does not remain in the vicinity of the container and is dispersed in the outside air, thereby preventing the phenomenon such as impurity around the container or deterioration of the spout. It can be maintained well.

When the safety valve is opened and the overpressure gas is partially released and the internal pressure of the container falls below a certain value, the safety valve returns to its original state and blocks the relief hole to prevent the release of unnecessary gas, thereby maintaining a constant pressure in the container. It can be reused.

On the other hand, by using the existing valve stem as it is, by simply installing a safety valve in the sub-housing formed in the housing to prevent damage due to overpressure of the aerosol container, the design of the main housing after the design deformation and then the safety device is designed. The effect of remarkably reducing the cumbersome change of manufacturing cost and manufacturing cost can be obtained.

In addition, the assembly line of the aerosol container without the existing safety device can be used almost as it is, there is also an effect that can be easily adopted and used in the existing assembly site.

Claims (9)

The housing 30 is fastened to the mounting cap 10 assembled to the upper part of the container body 2, and the valve stem 20 which is elastically supported through the spring 40 is fastened to the inside of the housing 30, Opening and closing seal 50 is inserted between the top of the housing 30 and the mounting cap 10 to open and close the orifice 23 formed in the valve stem 20 to control the liquid in and out of the container (1) To The housing 30 has a main accommodation groove 31 in which the valve stem 20 and the spring 40 are built in the center, and a liquid inlet 32 communicating with the accommodation groove 31, respectively. (30) The sub-housing 60 having a relief hole 61 on one side is integrally molded, and a bottom surface of the sub-housing 60 communicates with the relief hole 61 and an upper end of the mounting cap. Sub receiving grooves 62 communicating with the discharge holes 12 formed in the 10 are formed, and the relief holes 61 are selectively opened and closed in the sub receiving grooves 62 according to the internal pressure of the container 1. Overpressure safety device of the aerosol container, characterized in that the safety valve 70 is built. According to claim 1, wherein the safety valve 70 is seated on the bottom of the sub receiving groove 62, the opening and closing member 71 for opening and closing the relief hole 61 and the sub receiving groove 62 An elastic member 72 having a lower end placed on the opening and closing member 71 and a sealing ring 73 inserted between the upper end of the elastic member 72 and the mounting cap 10 while being embedded in an upper end of the sub receiving groove 62. Overpressure safety device of the aerosol container, characterized in that configured to include). 3. The overpressure safety device of an aerosol container according to claim 2, wherein the elastic member (72) is a cylindrical coil spring. According to claim 2 or 3, wherein the upper and lower ends of the elastic member 72 is fitted on the upper surface of the opening and closing member 71, characterized in that the support portion 71a for preventing deformation in the transverse direction is formed. Overpressure safety device for aerosol container. 2. The overpressure safety device of an aerosol container according to claim 1, wherein a circular protrusion (63a) having an inner diameter larger than that of the relief hole (61) is formed in the seat surface (63) of the sub-housing (60) in the circumferential direction. . 3. The overpressure safety device of an aerosol container according to claim 2, wherein the sealing ring (73) is made of a rubber material. The aerosol according to claim 1 or 2, wherein one side of the housing 30 is integrally formed with one or more balance weights 64 having the same shape as the sub-housing 60 and symmetrical to each other. Container overpressure safety device. 8. The overpressure safety of the gas fuel container according to claim 7, wherein the alignment jaw 13 is formed at an outer side of the discharge hole 12 formed in the mounting cap 10, into which the upper end of the sub housing 60 is inserted. Device. The circular rim 65 having a concentric circle with the main accommodation groove 31 is formed integrally outside the sub-housing 60. The circular rim 65 and the housing 30 according to claim 1 or 2 are formed. The overpressure safety device of the aerosol container, characterized in that connected to a plurality of arms (66).