Safety valve of aerosol can

Abstract

The utility model discloses a safety valve of an aerosol can, which relates to the field of aerosol cans and comprises a lower valve body and a pull rod, a middle valve body is mounted at the top of the lower valve body, an upper valve body is mounted at the top end of the middle valve body through a connecting flange, a fixing cylinder is arranged at the top of the upper valve body, and a limiting component is arranged in the fixing cylinder. The limiting assembly comprises an internal thread ring arranged on the outer wall of the fixing cylinder in a sleeving mode, clamping holes formed in the upper portions of the two sides of the pull rod and second springs installed on the two sides of the interior of the fixing cylinder. By arranging the limiting assembly, when the piston does not need to move, the clamping column is clamped into the clamping hole, at the moment, the second spring is in a stretching state, the clamping column can clamp and limit the pull rod, the pull rod and the valve rod are prevented from moving at will, and then the stability of the valve rod and the piston is improved; random upward movement of the valve body and the piston caused by mistaken touch of the pressing plate is avoided, so that the sealing stability of the piston and the sealing ring is improved, and the safety is improved.

Description

Technical Field

[0001] This utility model relates to the field of aerosol cans, specifically a safety valve for an aerosol can. Background Technology

[0002] Aerosol cans, also known as spray cans, are metal or plastic containers that use internal pressure to spray liquid or semi-liquid contents in the form of mist, foam, or jet. Their core principle is that the pressure generated by the propellant drives the contents outwards. They are widely used in daily life, industry, and medical fields, and are typically equipped with safety valves.

[0003] According to Chinese Patent No. CN214946404U, a safety valve for an aerosol can is disclosed. The safety valve of the aerosol can is configured with a first connecting block, a second connecting block, a sealing gasket, and a spring. The first connecting block and the second connecting block are connected to the middle valve body and the upper valve body as a whole by bolts, which seals the connection and prevents air leakage caused by poor sealing due to excessive pressure, thus ensuring convenient maintenance.

[0004] Regarding the aforementioned patent content, a handle is provided so that rotating the handle allows the sealing gasket to move up and down. When the sealing gasket moves up and no longer blocks the vent pipe, the liquid in the aerosol can can be sprayed out. However, when not in use, the sealing gasket will block the vent pipe to prevent the liquid in the aerosol can from spraying out. Since the handle is directly exposed to the external environment and is difficult to limit, if an outsider accidentally touches or presses the handle, it may cause the sealing gasket to move up arbitrarily, thereby causing the liquid in the aerosol can to suddenly spray out, resulting in waste and reducing the safety of valve use. Utility Model Content

[0005] Therefore, the purpose of this utility model is to provide a safety valve for an aerosol can to solve the technical problem that the sealing gasket will move upwards at will when an outsider accidentally touches and presses the handle.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a safety valve for an aerosol can, comprising a lower valve body and a pull rod. A middle valve body is installed on the top of the lower valve body, and an upper valve body is installed on the top of the middle valve body via a connecting flange. A fixed cylinder is provided on the top of the upper valve body, and a limiting component is provided inside the fixed cylinder. The limiting component includes an internally threaded ring sleeved on the outer wall of the fixed cylinder, a locking hole opened on both sides above the pull rod, and a second spring installed on both sides inside the fixed cylinder. A pressing groove is opened on the inner wall of the internally threaded ring. One end of the second spring is connected to a locking pin extending into the locking hole, and one end of the locking pin is equipped with a pressure rod penetrating to the outside of the fixed cylinder.

[0007] By adopting the above technical solution, the limit on the pull rod can be released after the locking pin is removed from the locking hole, so that the pull rod can be moved when the pressure plate is pressed.

[0008] Furthermore, a first spring is installed inside the upper part of the upper valve body, and a piston is connected to the bottom end of the first spring. A sealing ring is provided on the outer wall of the piston.

[0009] By adopting the above technical solution, the setting of the sealing gasket improves the sealing performance between the piston and the middle valve body, thereby improving the sealing performance inside the middle valve body and thus improving the stability during operation.

[0010] Furthermore, an air outlet pipe is connected to one side of the middle valve body, and a connecting flange is installed at one end of the air outlet pipe and the bottom end of the lower valve body.

[0011] By adopting the above technical solution, the air outlet pipe can be connected to external equipment via a connecting flange, and the lower valve body can be connected to the aerosol can via a connecting flange.

[0012] Furthermore, a valve stem is fixed at the top center of the piston, extending into the interior of the fixed cylinder, and a lifting plate is fixed at the top of the valve stem, with a pull rod installed at the top of the lifting plate.

[0013] By adopting the above technical solution, when the pull rod moves upward, it will drive the lifting plate to move upward, which in turn drives the valve rod to move upward, and then drives the piston to move upward.

[0014] Furthermore, the top end of the pull rod extends through to the outside of the fixed cylinder and is equipped with a movable plate. Two vertical plates are provided on one side of the top of the fixed cylinder, and a rotating shaft is rotatably provided between the two vertical plates. A pressure plate is installed on the outer wall of the rotating shaft.

[0015] By adopting the above technical solution, when the piston needs to be moved upward, the operator can press the pressure plate to make the pressure plate rotate through the shaft.

[0016] Furthermore, a pull plate is rotatably connected between the pressure plate and the movable plate.

[0017] By adopting the above technical solution, when the pressure plate rotates, it will pull the pull plate, which in turn can pull the movable plate to move.

[0018] Furthermore, the card post is adapted to the card hole.

[0019] By adopting the above technical solution, the pull rod can be clamped and limited after the locking pin is inserted into the locking hole.

[0020] Furthermore, one end of the pressure rod and the inner wall of the pressing groove are both set at an angle, and one end of the pressure rod is in contact with the inner wall of the pressing groove.

[0021] By adopting the above technical solution, the clamping groove can clamp and limit the pressure rod, preventing the pressure rod from moving arbitrarily.

[0022] Furthermore, the outer wall of the fixed cylinder is provided with threads, and the internal threaded ring is threadedly connected to the fixed cylinder.

[0023] By adopting the above technical solution, the internal threaded ring can move on the fixed cylinder when rotated, thereby adjusting the position of the internal threaded ring.

[0024] Furthermore, the outer wall of the internally threaded ring is provided with anti-slip texture.

[0025] By adopting the above technical solution, it is convenient for staff to rotate the internal threaded ring.

[0026] In summary, the present invention has the following main advantages:

[0027] 1. This utility model, by setting a limiting component, allows the locking pin to be inserted into the locking hole when the piston does not need to move. At this time, the second spring is in a stretched state, and the locking pin can lock and limit the pull rod, preventing the pull rod and valve stem from moving arbitrarily, thereby improving the stability of the valve stem and piston, avoiding accidental contact of the pressure plate which would cause the valve body and piston to move upward arbitrarily, thus improving the sealing stability of the piston and sealing ring and enhancing safety. When the piston needs to move upward, the operator can rotate the internal threaded ring, causing the internal threaded ring to move downward. At this time, the clamping groove moves downward, the second spring contracts, and thus drives the locking pin to move, allowing the locking pin to move out of the locking hole and release the limitation on the pull rod, thereby facilitating the movement of the pull rod when the pressure plate is pressed later.

[0028] 2. This utility model is equipped with an internal threaded ring, a clamping groove, and anti-slip texture. The internal threaded ring and the clamping groove can clamp and limit the pressure rod, preventing the pressure rod from moving freely after the clamping post is inserted into the clamping hole, thereby improving the stability after the clamping post is inserted into the clamping hole. The anti-slip texture makes it easy for the operator to rotate the internal threaded ring. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0030] Figure 2 This is a schematic diagram of the overall orthographic structure of this utility model;

[0031] Figure 3 This is a schematic diagram of the internal threaded ring structure of this utility model;

[0032] Figure 4 This is a schematic diagram of the pressure plate structure of this utility model;

[0033] Figure 5 This is a schematic diagram of the cross-sectional structure of the fixed cylinder of this utility model;

[0034] Figure 6 This is a schematic diagram of the movable plate structure of this utility model;

[0035] Figure 7 For the present utility model Figure 2 A magnified structural diagram of point A in the middle.

[0036] In the diagram: 1. Lower valve body; 2. Middle valve body; 3. Upper valve body; 4. Fixed cylinder; 5. Lifting plate; 6. Valve stem; 7. First spring; 8. Piston; 9. Limiting assembly; 901. Internal threaded ring; 902. Clamping groove; 903. Pressure rod; 904. Second spring; 905. Locking post; 906. Locking hole; 907. Anti-slip texture; 10. Air outlet pipe; 11. Pull rod; 12. Movable plate; 13. Pull plate; 14. Vertical plate; 15. Rotating shaft; 16. Pressure plate; 17. Sealing ring. Detailed Implementation

[0037] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0038] The embodiments of this utility model will be described below based on its overall structure.

[0039] Example 1:

[0040] A safety valve for an aerosol can, such as Figures 1-7 As shown, it includes a lower valve body 1 and a pull rod 11. A middle valve body 2 is installed on the top of the lower valve body 1, and an upper valve body 3 is installed on the top of the middle valve body 2 through a connecting flange. A fixed cylinder 4 is provided on the top of the upper valve body 3, and a limiting component 9 is provided inside the fixed cylinder 4. A first spring 7 is installed on the upper part of the interior of the upper valve body 3, and a piston 8 is connected to the bottom end of the first spring 7. An air outlet pipe 10 is connected to one side of the middle valve body 2, and a connecting flange is installed at one end of the air outlet pipe 10 and the bottom end of the lower valve body 1. The air outlet pipe 10 can be connected to external equipment through the connecting flange. The lower valve body 1 can be connected to an aerosol can through the connecting flange. A valve stem 6 that penetrates into the interior of the fixed cylinder 4 is fixed at the middle position of the top of the piston 8, and a lifting plate 5 is fixed at the top of the valve stem 6.

[0041] See Figures 2-6A pull rod 11 is installed on the top of the lifting plate 5. When the pull rod 11 moves upward, it will drive the lifting plate 5 to move upward, which in turn will drive the valve stem 6 to move upward, and then drive the piston 8 to move upward. The top of the pull rod 11 extends through to the outside of the fixed cylinder 4 and is equipped with a movable plate 12. Two vertical plates 14 are provided on one side of the top of the fixed cylinder 4, and a rotating shaft 15 is rotatably provided between the two vertical plates 14. A pressure plate 16 is installed on the outer wall of the rotating shaft 15. When the piston 8 needs to be moved upward, the operator can press the pressure plate 16 to make the pressure plate 16 rotate through the rotating shaft 15. A pull plate 13 is rotatably connected between the pressure plate 16 and the movable plate 12. When the pressure plate 16 rotates, it will pull the pull plate 13, which can pull the movable plate 12 to move. The pressure plate 16 is rotatably connected to the vertical plate 14 through the rotating shaft 15.

[0042] Specifically, the limiting component 9 includes an internal threaded ring 901 sleeved on the outer wall of the fixed cylinder 4, a locking hole 906 opened on both sides of the pull rod 11, and a second spring 904 installed on both sides inside the fixed cylinder 4. The inner wall of the internal threaded ring 901 is provided with a pressing groove 902. One end of the second spring 904 is connected to a locking post 905 extending into the locking hole 906, and one end of the locking post 905 is equipped with a pressure rod 903 that penetrates to the outside of the fixed cylinder 4. When the locking post 905 is moved out of the locking hole 906, the limiting of the pull rod 11 can be released, so that the pull rod 11 can be moved when the pressure plate 16 is pressed. The locking post 905 is adapted to the locking hole 906. When the locking post 905 is inserted into the locking hole 906, the pull rod 11 can be locked and limited.

[0043] Specifically, one end of the pressure rod 903 and the inner wall of the clamping groove 902 are both set at an angle. One end of the pressure rod 903 fits against the inner wall of the clamping groove 902. The end of the pressure rod 903 that fits against the inner wall of the clamping groove 902 and the inner wall of the clamping groove 902 are both smooth. The clamping groove 902 can clamp and limit the pressure rod 903 to prevent the pressure rod 903 from moving at will. The outer wall of the fixed cylinder 4 is provided with threads. The inner threaded ring 901 is threadedly connected to the fixed cylinder 4 so that when the inner threaded ring 901 is rotated, the inner threaded ring 901 can move on the fixed cylinder 4, thereby adjusting the position of the inner threaded ring 901. The outer wall of the inner threaded ring 901 is provided with anti-slip texture 907 to facilitate the rotation of the inner threaded ring 901 by the operator.

[0044] Example 2:

[0045] Based on the above embodiment 1, in order to improve the sealing between the piston 8 and the middle valve body 2, the following structure will be set.

[0046] See Figures 2-4 The outer wall of the piston 8 is provided with a sealing ring 17. The outer wall of the sealing ring 17 fits against the inner wall of the middle valve body 2. The setting of the sealing ring 17 improves the sealing between the piston 8 and the middle valve body 2, thereby improving the sealing inside the middle valve body 2 and thus improving the stability during operation.

[0047] The working principle of this utility model is as follows: First, the middle valve body 2 and the upper valve body 3 are installed together through a connecting flange. The air outlet pipe 10 can be connected to external equipment through the connecting flange, and the lower valve body 1 can be connected to the aerosol can through the connecting flange. When the piston 8 does not need to move, the locking pin 905 is inserted into the locking hole 906. At this time, the second spring 904 is in a stretched state, and the locking pin 905 can lock and limit the pull rod 11. The internal threaded ring 901 abuts and limits the pressure rod 903, preventing the pressure rod 903 from moving arbitrarily. This prevents the pull rod 11 and the valve rod 6 from moving arbitrarily and improves the stability of the valve rod 6 and the piston 8. When it is necessary to move the piston 8 upward so that the liquid in the aerosol can be sprayed out, the operator can rotate the internal threaded ring 901 so that the internal threaded ring... As 901 moves downward, the clamping groove 902 also moves downward, and the internal threaded ring 901 no longer clamps against the pressure rod 903. The second spring 904 contracts, thereby driving the locking pin 905 to reset and move, so that the locking pin 905 moves out of the locking hole 906 and releases the limit on the pull rod 11. Then, the operator presses the pressure plate 16, and the pressure plate 16 rotates, which pulls the pull plate 13. The pull plate 13 then pulls the movable plate 12 upward, which in turn drives the pull rod 11 and the lifting plate 5 upward, and drives the valve rod 6 upward, and then drives the piston 8 upward. Thus, the piston 8 and the sealing ring 17 no longer block the liquid rising from the pressure aerosol can into the lower valve body 1 under the action of pressure. Under the action of the pressure difference between the inside and outside, the liquid in the lower valve body 1 can pass through the middle valve body 2 and finally be sprayed out from the air outlet pipe 10.

[0048] Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. After reading this specification, those skilled in the art may make modifications, substitutions, and variations to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, and variations are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A safety valve for an aerosol container comprising a lower valve body (1) and a pull rod (11), characterized in that: The top of the lower valve body (1) is provided with a middle valve body (2), and the top end of the middle valve body (2) is provided with an upper valve body (3) through a connecting flange, the top of the upper valve body (3) is provided with a fixing cylinder (4), the inside of the fixing cylinder (4) is provided with a limiting assembly (9), the limiting assembly (9) comprises an internal thread ring (901) sleeved on the outer wall of the fixing cylinder (4), a clamping hole (906) opened on the upper side of the pull rod (11) and a second spring (904) mounted on the inside of the fixing cylinder (4), the inner wall of the internal thread ring (901) is provided with an abutting groove (902), one end of the second spring (904) is connected with a clamping column (905) extending into the clamping hole (906), and one end of the clamping column (905) is provided with a pressing rod (903) penetrating to the outside of the fixing cylinder (4).

2. A safety valve for an aerosol container according to claim 1, wherein: The inside of the upper valve body (3) is provided with a first spring (7) above, and the bottom end of the first spring (7) is connected with a piston (8), and the outer wall of the piston (8) is provided with a sealing ring (17).

3. A safety valve for an aerosol container according to claim 1, wherein: One side of the middle valve body (2) is connected with an air outlet pipe (10), and one end of the air outlet pipe (10) and the bottom end of the lower valve body (1) are provided with a connecting flange.

4. A safety valve for an aerosol container according to claim 2, wherein: The top of the piston (8) is fixed with a valve rod (6) penetrating to the inside of the fixing cylinder (4), and the top end of the valve rod (6) is fixed with a lifting plate (5), and the top of the lifting plate (5) is provided with a pull rod (11).

5. A safety valve for an aerosol container according to claim 4, wherein: The top end of the pull rod (11) penetrates to the outside of the fixing cylinder (4) and is provided with a movable plate (12), one side of the top of the fixing cylinder (4) is provided with two vertical plates (14), and the two vertical plates (14) are rotatably provided with a rotating shaft (15), and the outer wall of the rotating shaft (15) is provided with a pressing plate (16).

6. A safety valve for an aerosol container according to claim 5, wherein: The pull plate (13) is rotatably connected between the pressing plate (16) and the movable plate (12).

7. A safety valve for an aerosol container according to claim 1 wherein: The clamping column (905) is matched with the clamping hole (906).

8. A safety valve for an aerosol container according to claim 1, wherein: One end of the pressing rod (903) and the inner wall of the abutting groove (902) are both provided with inclined surfaces, and one end of the pressing rod (903) is matched with the inner wall of the abutting groove (902).

9. A safety valve for an aerosol container according to claim 1 wherein: The outer wall of the fixing cylinder (4) is provided with threads, and the internal thread ring (901) is threadedly connected with the fixing cylinder (4).

10. A safety valve for an aerosol container according to claim 1, wherein: The outer wall of the internal thread ring (901) is provided with anti-skid lines (907).

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