A large-volume quantitative aerosol valve

Abstract

The invention discloses a quantitative aerosol valve with an ultra-large spray volume, comprising a pressing head, a nozzle, a sealing cup, an inner gasket, a valve stem, a spring and a valve chamber, wherein the upper end of the valve chamber is fixed on the inner side of a fixing cap of the sealing cup, an air inlet channel is provided between the fixing cap and the upper port of the valve chamber, the inner gasket is sleeved on the outer side of the valve stem and fixed between the upper port of the valve chamber and the fixing cap to seal the upper port of the valve chamber, the valve chamber is a hollow columnar structure with a closed lower end, a column platform is provided inside the valve chamber, which protrudes upward from the bottom to the middle position, an inner channel is provided in the column platform, a straw is inserted at the lower part of the inner channel, an inner port communicating with the inner cavity of the valve chamber is provided at the top, an annular thin sheet is provided on the edge of the inner port, the lower end of the valve stem passes through the inner port and is inserted into the inner channel, and the lower end of the valve stem is provided with a slope surface which is interference-fitted with the annular thin sheet to realize sealing, the valve stem is an inner hollow structure with an open upper end and a closed lower end, and is provided with an inlet located above the inner gasket, and has an ultra-large spray volume under the condition of small volume change.

Description

Technical Field

[0001] The invention relates to a super-large spray volume quantitative aerosol valve. Background Art

[0002] Aerosol valves are pressure-resistant containers with special valves that contain drugs, emulsions or suspensions and suitable propellants. When used, the contents are sprayed out in the form of aerosols with the help of the pressure of the propellant. It is difficult to achieve quantitative spraying with existing aerosol valves. Even if quantitative spraying is achieved, it is a small amount of quantitative spraying. The small amount of spraying here refers to the situation where the relative volume of the aerosol valve does not change much and is relatively small.

[0003] The present invention is made based on this situation. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a large spray volume quantitative aerosol valve, which has the characteristics of simple structure and large spray volume without much volume change.

[0005] The present invention is achieved through the following technical solutions:

[0006] A large-volume quantitative aerosol valve, comprising a push head, a sealing cup, an inner gasket, a valve stem, a spring, and a valve chamber, wherein a fixing cap is provided in the middle of the sealing cup, and the upper end of the valve chamber is fixed on the inner side of the fixing cap, and an air inlet passage is provided between the fixing cap and the valve chamber for the gas outside the valve chamber to enter the valve chamber through the upper port of the valve chamber, the valve stem is located in the valve chamber and the upper end passes through the fixing cap to be connected with the push head, the push head is provided with a nozzle, the inner gasket is sleeved on the outer side of the valve stem and fixed between the upper port of the valve chamber and the fixing cap to seal the upper port of the valve chamber, the valve chamber is a hollow cylindrical structure with a closed lower end, and a nozzle is provided inside the valve chamber from the bottom to the inside. A column platform protrudes from the upper part to the middle position, an inner channel is provided in the column platform, a straw is inserted in the lower part of the inner channel, an inner opening is provided on the top of the column platform for connecting the inner channel and the inner cavity of the valve chamber, an annular sheet extending into the inner channel is provided on the edge of the inner opening, the lower end of the valve stem passes through the inner opening and is inserted into the inner channel, and a slope surface is provided on the lower end of the valve stem for interference fit with the annular sheet to achieve sealing, the inner wall of the valve chamber and the column platform are spaced apart, and a reinforcing rib connecting the two is provided therebetween, the valve stem is an inner hollow structure with an open upper end and a closed lower end, and an entrance located above the inner gasket is provided on the side of the valve stem.

[0007] In the ultra-large spray volume metered aerosol valve as described above, the spring sleeve is arranged on the outside of the valve stem and its lower end presses on the column platform. A convex ring is provided on the outside of the valve stem for the upper end of the spring to press. The convex ring is located below the inner gasket and prevents the valve stem from falling out upwards.

[0008] As described above, an ultra-large spray volume metered aerosol valve, the upper end of the valve chamber is provided with a clamping portion that convexes outward and is clamped with the inside of a fixed cap, the clamping portion is provided with a downwardly concave groove, the inner gasket is arranged on the groove, and the bottom of the groove is provided with an annular sealing boss that protrudes in the groove and surrounds the upper port of the valve chamber, the clamping portion is provided with a plurality of vertically connected through grooves at intervals along the circumferential direction, the side surfaces of the groove are connected to the through grooves to form an air intake channel, the inner gasket is pressed on the sealing boss to close the air intake channel, and when the inner gasket is compressed under high pressure, a channel connecting the through groove and the upper port of the valve chamber is formed between the sealing boss and the inner gasket, thereby opening the air intake channel for gas to enter the valve chamber.

[0009] In the ultra-large spray volume metered aerosol valve as described above, the cross section of the sealing boss has an outer side that is a gradually changing arc structure that gradually rises from the outside to the inside, and an inner side that is an inverted arc structure.

[0010] In the ultra-large spray volume metered aerosol valve as described above, the reinforcing rib extends to be flush with the bottom of the groove to serve as a support for the inner gasket, and the width of the upper portion thereof located above the column platform becomes smaller.

[0011] The ultra-large spray volume quantitative aerosol valve as described above has an outer gasket arranged on one side of the sealing cup.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] 1. The present invention can maximize the spray volume and realize ultra-large quantitative spraying while ensuring that the shape and volume do not change much. The interference sealing structure of the annular sheet makes the pressing and rebounding smoother and more stable, and the sealing is safer and more stable.

[0014] 2. The gradually changing arc-shaped sealing boss makes the gas filling speed faster and greatly improves the filling productivity. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0016] Figure 1 It is a cross-sectional view of a large-volume quantitative aerosol valve of the present invention;

[0017] Figure 2 It is a structural schematic diagram of the valve chamber;

[0018] Figure 3 is a cross-sectional view of the valve chamber;

[0019] Figure 4 The present invention is a schematic diagram of an embodiment of an ultra-large spray volume metered aerosol valve installed on a pressure tank. DETAILED DESCRIPTION

[0020] The present invention will be further described below in conjunction with the accompanying drawings:

[0021] like Figures 1 to 3 The illustrated embodiment of a large-volume quantitative aerosol valve comprises a push head 1, a sealing cup 2, an inner gasket 3, a valve stem 4, a spring 5, and a valve chamber 6. A fixed cap 21 is provided in the middle of the sealing cup 2, and the upper end of the valve chamber 6 is fixed on the inner side of the fixed cap 21. An air inlet passage is provided between the fixed cap 21 and the valve chamber 6 for the gas outside the valve chamber to enter the valve chamber 6 through the upper port of the valve chamber 6. The valve stem 4 is located in the valve chamber 6 and the upper end passes through the fixed cap 21 to be connected with the push head 1. A nozzle 7 is provided on the push head 1. The inner gasket 3 is sleeved on the outer side of the valve stem 4 and fixed between the upper port of the valve chamber 6 and the fixed cap 21 to seal the upper port of the valve chamber 6. The valve chamber 6 is a hollow columnar structure with a closed lower end. A column platform 61 is provided inside the valve chamber 6, which protrudes upward from the bottom to the middle position. An inner channel 62 is provided in the column platform 61. A straw 8 is inserted into the lower part of the inner channel 62. The design of the valve chamber 6 and the column platform 61 structure of the columnar structure can maximize the volume of the inner cavity of the valve chamber 6 when the volume of the quantitative aerosol valve does not change much. The top of the column platform 61 is provided with an inner opening 63 connecting the inner channel 62 and the inner cavity of the valve chamber 6. The edge of the inner opening 63 is provided with an annular sheet 64 extending into the inner channel 62. The lower end of the valve stem 4 passes through the inner opening 63 and is inserted into the inner channel 62. The lower end of the valve stem 4 is provided with a slope surface that is interference fit with the annular sheet 64 to achieve sealing. The inner wall of the valve chamber 6 and the column platform 61 are arranged at an interval, and a reinforcing rib 65 connecting the two is provided therebetween. The valve stem 4 is an inner hollow structure with an open upper end and a closed lower end. The side of the valve stem 4 is provided with an inlet 41 located above the inner gasket 3.

[0022] An outer gasket 9 is provided on one side of the sealing cup 2 so as to be sealed and connected with the bottle or can containing the contents. Figure 4 This is a schematic diagram of the metered-dose aerosol valve being mounted on a pressure tank.

[0023] The spring 5 is sleeved on the outside of the valve stem 4 and its lower end is pressed on the column 61. A convex ring 42 is provided on the outside of the valve stem 4 for the upper end of the spring 5 to press. The convex ring 42 is located below the inner gasket 3 and prevents the valve stem 4 from falling out upwards. The structure is simple and easy to assemble.

[0024] The upper end of the valve chamber 6 is provided with a convex clamping portion 66 that is clamped with the inside of the fixing cap 21, and the clamping portion 66 is provided with a downwardly concave groove 67. The inner gasket 3 is arranged on the groove 67, and the bottom of the groove 67 is provided with an annular sealing boss 68 that protrudes in the groove 67 and surrounds the upper end of the valve chamber 6. The clamping portion 66 is provided with a plurality of through grooves 69 that are connected to each other up and down at intervals in the circumferential direction. The side surfaces of the groove 67 are connected to the through grooves 69 to form an air intake passage. The inner gasket 3 is pressed on the sealing boss 68 to close the air intake passage. When the air pressure in the valve chamber 6 drops to a certain level, so that there is a certain pressure difference between the inside and outside of the valve chamber 6, when the inner gasket 3 is compressed under high pressure, a channel connecting the through groove 69 and the upper end of the valve chamber 6 is formed between the sealing boss 68 and the inner gasket 3, thereby opening the air intake passage for gas to enter the valve chamber 6.

[0025] The cross section of the sealing boss 68 has an outer side that is a gradually changing arc structure that gradually rises from the outside to the inside, and an inner side that is an inverted arc structure. The gradually changing arc sealing boss makes the gas filling speed faster and greatly improves the filling capacity.

[0026] The reinforcing rib 65 extends to be flush with the bottom of the groove 67 to prevent the inner gasket 3 from deforming and falling into the valve chamber 6, and the upper width thereof above the column platform 61 becomes smaller to serve as a support for the inner gasket 3 and to make the inner cavity volume of the valve chamber 6 as large as possible to increase the quantitative spraying amount.

[0027] When pressed, the valve stem 4 moves downward. During the pressing process, the annular sheet 64 and the valve stem 4 are always in interference fit, and the inner port 63 is always in a sealed state. When the inlet 41 moves to the bottom of the inner gasket 3, the contents in the valve chamber 6, including high-pressure gas and solution, enter the valve stem 4 from the inlet 41 and spray out aerosol from the nozzle 7; when the pressing is released and the valve stem 4 bounces up, the high-pressure contents in the valve chamber 6 have been sprayed out, the inside of the valve chamber 6 is in a low-pressure state, and the bottle outside the valve chamber 6 is in a high-pressure state. The inner gasket 3 is compressed under high pressure to form a channel for the gas in the bottle to enter the valve chamber 6. At the same time, the valve stem 4 is subjected to the pressure of the solution in the inner channel 62, and the slope surface of the lower end of the valve stem 4 is pushed open from the annular sheet 64, forming a gap for the solution to enter the valve chamber 6, until the pressure in the valve chamber 6 reaches a balanced state with the outside.

[0028] The present invention can maximize the spray volume while ensuring that the shape and volume do not change much, and the interference sealing structure of the annular sheet 64 makes the pressing and rebounding smoother and more stable, and the sealing is safer and more stable.

Claims

1. A large-volume quantitative aerosol valve, characterized in that: The invention comprises a pressing head (1), a sealing cup (2), an inner gasket (3), a valve stem (4), a spring (5), and a valve chamber (6); a fixing cap (21) is provided in the middle of the sealing cup (2); the upper end of the valve chamber (6) is fixed on the inner side of the fixing cap (21); an air inlet passage is provided between the fixing cap (21) and the valve chamber (6) for allowing gas outside the valve chamber to enter the valve chamber (6) through the upper port of the valve chamber (6); the valve stem (4) is located in the valve chamber (6) and the upper end thereof passes through the fixing cap (21) and is connected to the pressing head (1); a nozzle (7) is provided on the pressing head (1); the inner gasket (3) is sleeved on the outer side of the valve stem (4) and fixed between the upper port of the valve chamber (6) and the fixing cap (21) to seal the valve. The upper end of the chamber (6) is sealed, the valve chamber (6) is a hollow columnar structure with a closed lower end, the valve chamber (6) is provided with a columnar platform (61) protruding from the bottom to the middle, the columnar platform (61) is provided with an inner channel (62), the lower part of the inner channel (62) is plugged with a straw (8), the top of the columnar platform (61) is provided with an inner opening (63) connecting the inner channel (62) and the inner cavity of the valve chamber (6), the edge of the inner opening (63) is provided with an annular sheet (64) extending into the inner channel (62), the lower end of the valve stem (4) passes through the inner opening (63) and is inserted into the inner channel (62), and the lower end of the valve stem (4) is provided with an interference fit with the annular sheet (64). A slope surface is provided to achieve sealing, the inner wall of the valve chamber (6) and the column platform (61) are arranged at intervals, and a reinforcing rib (65) is provided between the two to connect the two, the valve stem (4) is an inner hollow structure with an upper end open and a lower end closed, the side of the valve stem (4) is provided with an inlet (41) located above the inner gasket (3), the upper end of the valve chamber (6) is provided with a convex clamping portion (66) that is clamped with the inside of the fixing cap (21), the clamping portion (66) is provided with a groove (67) that is concave downward, the inner gasket (3) is arranged on the groove (67), and the bottom of the groove (67) is provided with an annular sealing boss that protrudes in the groove (67) and surrounds the upper end of the valve chamber (6) (68), a plurality of vertically connected through grooves (69) are arranged at intervals along the circumferential direction on the clamping portion (66), the side of the groove (67) is connected to the through groove (69) to form an air intake passage, the inner gasket (3) is pressed on the sealing boss (68) to close the air intake passage, and when the inner gasket (3) is compressed under high pressure, a passage connecting the through groove (69) and the upper port of the valve chamber (6) is formed between the sealing boss (68) and the inner gasket (3), opening the air intake passage for gas to enter the valve chamber (6), the cross section of the sealing boss (68), the outer side of which is a gradually changing arc structure that gradually rises from the outside to the inside, and the inner side is an inverted arc structure, and an outer gasket (9) is arranged on one side of the sealing cup (2).

2. The large-volume quantitative aerosol valve according to claim 1, characterized in that: The spring (5) is sleeved on the outside of the valve stem (4) and its lower end is pressed against the column platform (61). A convex ring (42) is provided on the outside of the valve stem (4) for the upper end of the spring (5) to press against. The convex ring (42) is located below the inner gasket (3) and prevents the valve stem (4) from falling out upward.

3. The large-volume quantitative aerosol valve according to claim 1, characterized in that: The reinforcing rib (65) extends to be flush with the bottom of the groove (67) to serve as a support for the inner gasket (3), and the width of the upper portion thereof located above the column base (61) becomes smaller.

Images