Sealing valve element assembly and pressure cooker
By wrapping plastic or aluminum wrapping layers at the metal valve core and fixed column connection, the problem of rust at the connection is solved, ensuring food safety and maintaining sealing function.
Patent Information
- Application Number
- CN202421930434.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-09
- Publication Date
- 2025-06-17
- Estimated Expiration
- 2034-08-09
AI Technical Summary
In the prior art, the connection between the metal valve core and the metal fixed column is prone to oxidation and rust, which affects food safety.
At the outer surface of the enclosure layer at the spherical metal valve core and the metal fixed column connection, the enclosure layer may be plastic or aluminum material, and a sealed spherical assembly is formed by injection molding or pressing wrapping.
It effectively avoids oxidation and rust at the connection, ensures the safety of cooking food, and does not affect the sealing function of the sealing valve core assembly.
Smart Images
Figure CN222982849U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of pressure cooker sealing, in particular to a sealing valve core assembly of a pressure limiting valve used in a pressure cooker. Background Art
[0002] A pressure cooker can not only cook rice, but also, because of its high-pressure function, can cook ingredients that are not easy to cook well relatively quickly, with very powerful functions. Therefore, it is very popular among consumers and has entered thousands of households. As the core component for controlling the pressure of a pressure cooker, the pressure limiting valve has also undergone many structural innovations.
[0003] In the prior art, the valve core of the pressure limiting valve is made of silica gel material, formed by a mold, and inserted into the exhaust pipe for sealing. There are tiny burrs in the exhaust pipe during the machining process. After being combined with the relatively soft silica gel valve core, there will be no air leakage problem at the beginning. However, under the action of high temperature, high pressure, acid, alkali and salt for a long time, the silica gel will quickly age and other problems will occur. Once the silica gel valve core ages, air leakage will definitely occur. In order to solve the problems existing in the prior art, both the valve core of the pressure limiting valve and the fixing column are made of metal materials, which can well solve the problem of silica gel valve core aging. However, when the metal valve core and the metal fixing column are connected, they often need to be fixed by high temperature. For example, the metal valve core and the metal fixing column are fixed by welding. The crystal structure of the material at the connection of the metal valve core and the metal fixing column changes due to high temperature, so it is easy to rust, and there is a food safety problem during cooking. Summary of the Utility Model
[0004] In order to overcome the deficiencies of the prior art, the main purpose of the utility model is to solve the technical problem that the connection between the metal valve core and the metal fixing column is prone to oxidation and rust.
[0005] In order to achieve the above purpose, the utility model provides a sealing valve core assembly, including a metal fixing column, a spherical metal valve core and a wrapping layer. The metal fixing column and the spherical metal valve core are fixedly connected to form the main body of the sealing valve core assembly. The surface of the spherical metal valve core away from the metal fixing column is a sealing surface; the wrapping layer at least wraps the outer surface of the connection between the metal fixing column and the spherical metal valve core, and the sealing surface of the spherical metal valve core is exposed outside the wrapping layer.
[0006] Preferably, the wrapping layer is a plastic wrapping layer.
[0007] Preferably, the plastic wrapping layer and the main body of the sealing valve core assembly are integrally formed by injection molding.
[0008] Preferably, the wrapping layer is an aluminum wrapping layer, and the aluminum wrapping layer is wrapped around the corresponding wrapped part of the main body of the sealing valve core assembly by pressing.
[0009] Preferably, the diameter of the spherical metal valve core is greater than or equal to 1 mm and less than or equal to 10 mm.
[0010] Preferably, the shape of the wrapping layer conforms to the outer surface shape of the main body of the sealing valve core assembly. The wrapping layer is wrapped on the outer surface of the main body of the sealing valve core assembly, and the distance between the lowest wrapping surface of the wrapping layer and the lowest surface of the spherical metal valve core is greater than or equal to the radius of the spherical metal valve core.
[0011] To achieve the above object, the present utility model further provides a pressure cooker, including a pot body, a pot lid, an exhaust pipe and a pressure limiting valve. The pot lid is used to open and close the pot body; it further includes any one of the above-mentioned sealing valve core assemblies; the corresponding part of the metal fixing column is arranged inside the internal cavity of the pressure limiting valve; the exhaust pipe passes through the pot lid and is fixed to the pot lid, and the exhaust pipe communicates the inside and outside of the pot body; the sealing surface of the spherical metal valve core is in close contact with the exhaust port of the exhaust pipe to seal the exhaust port.
[0012] Preferably, a chamfer is formed at the exhaust port of the exhaust pipe, and the sealing surface of the spherical metal valve core is in close contact with the chamfer to seal the exhaust port.
[0013] Preferably, a fillet is formed at the exhaust port of the exhaust pipe, and the sealing surface of the spherical metal valve core is in close contact with the fillet to seal the exhaust port.
[0014] Preferably, a sharp corner is formed at the exhaust port of the exhaust pipe, and the sealing surface of the spherical metal valve core is in close contact with the sharp corner to seal the exhaust port.
[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:
[0016] (1) Since at least the outer surface of the connection between the spherical metal valve core and the metal fixing column is wrapped with a wrapping layer, and the wrapping layer can isolate this connection from the outside world, therefore, it can effectively prevent this connection from rusting, thus ensuring the safety of cooking food;
[0017] (2) Since after adding the wrapping layer, the sealing surface of the spherical metal valve core is still exposed outside the wrapping layer, therefore, it will not affect the sealing function of the sealing valve core assembly. Description of the Drawings
[0018] Figure 1 It is a schematic structural diagram of the sealing valve core assembly of the present utility model;
[0019] Figure 2 It is a schematic structural diagram of the assembled sealing valve core assembly and the pressure cooker of the present utility model;
[0020] Figure 3 This is a schematic structural diagram of an embodiment of the sealing between the valve core and the exhaust port in the present utility model;
[0021] Figure 4 This is a schematic structural diagram of another embodiment of the sealing between the valve core and the exhaust port in the present utility model;
[0022] Figure 5 This is a schematic structural diagram of another embodiment of the sealing between the valve core and the exhaust port in the present utility model.
[0023] The descriptions of each identifier in the figure are as follows:
[0024] Sealing valve core assembly - 10; Metal fixing column - 11; Spherical metal valve core - 12; Wrapping layer - 13; Sealing surface - 14; Connection between the metal fixing column and the spherical metal valve core - 15; Lowest wrapping surface - 16; Pot lid - 20; Exhaust pipe - 30; Exhaust port 31; Pressure limiting valve - 40; Pot body - 50. Specific embodiments
[0025] The present utility model will be described in more detail below with reference to the accompanying drawings. It should be noted that the description of the present utility model with reference to the accompanying drawings below is only illustrative and not restrictive.
[0026] Where possible, the following described various different embodiments can be recombined with each other to form other embodiments not shown in the following description; the following described various different technical features can also be recombined with each other to form other embodiments not shown in the following description.
[0027] Embodiment 1
[0028] Please refer to Figures 1 to 5 , in order to solve the technical problem that the connection between the metal valve core and the metal fixing column is prone to rusting, this embodiment provides a sealing valve core assembly 10, which includes: a metal fixing column 11, a spherical metal valve core 12, and a wrapping layer 13; the metal valve core 12 and the spherical metal fixing column 11 are connected to form the main body of the sealing valve core assembly, and the surface of the spherical metal valve core 12 away from the metal fixing column 11 is the sealing surface 14; the wrapping layer 13 is wrapped on the outer surface of the connection 15 between the metal fixing column and the spherical metal valve core, and the sealing surface 14 of the spherical metal valve core 12 is exposed outside the wrapping layer 13.
[0029] When assembling this sealing valve core assembly, first weld and fix the spherical metal valve core and the metal fixing column at their connection to form the main body of the sealing valve core assembly, then perform passivation treatment on the sealing valve core assembly, and next wrap the wrapping layer on the outer surface of the connection between the metal fixing column and the spherical metal valve core to finally form this sealing valve core assembly.
[0030] Since the outer surface of the connection between the spherical metal valve core and the metal fixing column is wrapped with a wrapping layer, and the wrapping layer can isolate this connection from the outside world, it can effectively prevent this connection from rusting, thus ensuring the safety of cooked food. Moreover, after adding the wrapping layer, the sealing surface of the spherical metal valve core is still exposed outside the wrapping layer, so it will not affect the sealing function of the sealing valve core assembly.
[0031] When assembling the valve core assembly into a pressure cooker to seal the exhaust port of the exhaust pipe, due to the compensation effect of the spherical surface of the spherical valve core, the processing requirements of the exhaust pipe and the risk of air leakage in the pressure limiting valve sealing structure caused by the uneven stove can also be greatly reduced. Of course, in other embodiments, the valve core can also be a quasi-spherical valve core, an elliptical valve core, etc. It should be noted that the replacement of such valve cores with curved surfaces should be within the protection scope of this application.
[0032] Since the valve core assembly finally needs to be assembled into the pressure limiting valve of the pressure cooker, and the cavity space of the pressure limiting valve is limited, the diameter of the spherical valve core should not be too large. An overly large spherical valve core will inevitably lead to an overly large valve core seat, making it impossible to install the overly large valve core assembly into the cavity of the pressure limiting valve of the pressure cooker. In a further specific embodiment, the diameter SR of the spherical valve core is greater than or equal to 1 mm and less than or equal to 10 mm. For example, the diameter SR of the spherical valve core is 1 mm, 1.5 mm, 2.1 mm, 5.6 mm, 8.8 mm, 9.3 mm, 10 mm, and so on.
[0033] In a further specific embodiment, the wrapping layer is a plastic wrapping layer, and the plastic wrapping layer and the main body of the sealing valve core assembly are integrally formed by injection molding. The plastic material itself is not easy to rust, and its integral formation with the main body of the sealing valve core assembly through injection molding not only makes the process simple, but also can completely isolate the part of the main body of the sealing valve core assembly wrapped by the plastic wrapping layer from the outside world, further reducing the possibility of rusting. In other embodiments, the wrapping layer can also be an aluminum wrapping layer, which is wrapped around the corresponding wrapped part of the main body of the sealing valve core assembly by pressing.
[0034] Embodiment 2
[0035] Please refer to Figures 1 to 5 , the difference between this embodiment and Embodiment 1 is mainly that not only the connection between the metal fixing column and the spherical metal valve core is wrapped and isolated, but also other parts of the main body of the sealing valve core assembly formed by the fixed connection between the spherical metal valve core and the metal fixing column can be further wrapped and protected.
[0036] Therefore, on the basis of implementing Column 1, the sealing valve core assembly provided in this embodiment has a wrapping layer 13 whose shape is adapted to the outer surface shape of the main body of the sealing valve core assembly. The wrapping layer 13 is wrapped on the outer surface of the main body of the sealing valve core assembly, and the distance between the lowest wrapping surface 16 of the wrapping layer 13 and the lowest surface of the spherical metal valve core is greater than or equal to the radius of the spherical metal valve core. In this way, not only is the connection between the metal fixing column and the spherical metal valve core wrapped and isolated to prevent oxidation and rust, but also other parts of the main body of the sealing valve core assembly are further wrapped and protected. At the same time, since the distance between the lowest wrapping surface of the wrapping layer and the lowest surface of the spherical metal valve core is greater than or equal to the radius of the spherical metal valve core, the wrapping layer will not affect the sealing function of the sealing surface.
[0037] Embodiment Three
[0038] Please refer to Figures 1 to 5 , this embodiment provides a pressure cooker, including a pot lid 20, an exhaust pipe 30, a pressure limiting valve 40, and a pot body 50. The pot lid 20 is used to open and close the pot body 50. The sealing valve core assembly 10 described in any one of Embodiment 1 and Embodiment 2 is applied to this pressure cooker to seal the exhaust pipe 30. Specifically, it can be:
[0039] The corresponding part of the metal fixing column 11 is arranged in the internal cavity of the pressure limiting valve 40. It can be that the sealing valve core assembly 10 is formed into the pressure limiting valve by insert injection molding. The exhaust pipe 30 passes through the pot lid 20 and is fixed to the pot lid. The exhaust pipe 30 communicates the inside and outside of the pot body. The sealing surface 14 of the spherical metal valve core 12 is in close contact with the exhaust port 31 of the exhaust pipe 30 to seal the exhaust port.
[0040] Since at least the outer surface of the connection between the spherical metal valve core and the metal fixing column is wrapped with a wrapping layer, and the wrapping layer can isolate this connection from the outside world, therefore, it can effectively prevent this connection from oxidizing and rusting, and no rust particles will fall into the cooking cavity, thus ensuring the safety of the cooked food; moreover, after the spherical metal valve core, the metal fixing column, and the wrapping layer are assembled, the sealing surface of the spherical metal valve core is still exposed outside the wrapping layer, and the sealing surface of the spherical metal valve core can still cover the entire exhaust port. Therefore, it will not affect the sealing function of the sealing valve core assembly, thus avoiding the problem of air leakage caused by poor sealing of the exhaust port.
[0041] In a more specific embodiment, such as Figure 3As shown, a chamfer is formed at the exhaust port 31 of the exhaust pipe 30, and a part of the metal valve core 12 is in close contact with the chamfer to seal the exhaust port. The setting of the chamfer makes the position of the exhaust port slightly lower than that of the chamfer. The valve core is not only in close contact with the exhaust port but also with the chamfer, increasing the sealing contact area and thus making the sealing effect better. Moreover, for the exhaust pipe with a chamfer, since the gas is affected by the ball when discharging from the chamfer, the pressure range from the start of exhaust to the stable air pressure will be lengthened. For a pressure cooker without a safety valve, the pressure limiting valve can be used as a safety valve.
[0042] In another more specific embodiment, as Figure 4 shown, a fillet is formed at the exhaust port 31 of the exhaust pipe 30, and a part of the metal valve core 12 is in close contact with the fillet to seal the exhaust port. Although the exhaust port and the fillet are at the same level, when the metal valve core is a spherical valve core, the contact area will be increased due to the contact between the arc surface of the valve core and the arc surface of the fillet, thus making the sealing effect better. Moreover, when the gas is discharged from the fillet, affected by the ball, the pressure range from the start of exhaust to the stable air pressure is relatively short. For a pressure cooker with a safety valve, this can fully meet the working pressure from the start of exhaust to the pressure stability within 30 s.
[0043] In another more specific embodiment, as Figure 5 shown, a sharp corner is formed at the exhaust port 31 of the exhaust pipe 30. Although there will be burrs on the sharp corner no matter how it is processed, since the valve core is the metal valve core 12, there is no need to worry about air leakage caused by the burrs.
[0044] Although multiple specific embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are merely exemplary and should not be construed as limiting the protection scope of the present invention. Any non-substantial changes and substitutions made by those of ordinary skill in the art fall within the scope of protection required by the present invention.
Claims
1. A sealing valve core assembly, characterized in that: It includes a metal fixing column, a spherical metal valve core and a wrapping layer, wherein the metal fixing column and the spherical metal valve core are fixedly connected to form a sealing valve core assembly body, and the surface of the spherical metal valve core away from the metal fixing column is a sealing surface; The wrapping layer at least wraps around the outer surface of the connection between the metal fixing column and the spherical metal valve core, and the sealing surface of the spherical metal valve core is exposed outside the wrapping layer.
2. The sealing valve core assembly according to claim 1, characterized in that: The wrapping layer is a plastic wrapping layer.
3. The sealing valve core assembly according to claim 2, characterized in that: The plastic wrapping layer and the sealing valve core component body are formed into one piece by injection molding.
4. The sealing valve core assembly according to claim 1, characterized in that: The wrapping layer is an aluminum wrapping layer, and the aluminum wrapping layer is wrapped around the corresponding wrapped portion of the sealing valve core assembly body by pressing.
5. The sealing valve core assembly according to claim 1, characterized in that: The diameter of the spherical metal valve core is greater than or equal to 1 mm and less than or equal to 10 mm.
6. The sealing valve core assembly according to any one of claims 1 to 5, characterized in that: The shape of the wrapping layer is adapted to the outer surface shape of the sealing valve core assembly body, the wrapping layer is wrapped on the outer surface of the sealing valve core assembly body, and the distance between the lowest wrapping surface of the wrapping layer and the lowest surface of the spherical metal valve core is greater than or equal to the radius of the spherical metal valve core.
7. A pressure cooker, comprising a cooker body, a cooker cover, an exhaust pipe and a pressure limiting valve, wherein the cooker cover is used to open and close the cooker body, characterized in that: Also includes a sealing valve core assembly as claimed in any of the preceding claims; The corresponding part of the metal fixing column is arranged in the internal cavity of the pressure limiting valve; The exhaust pipe passes through the pot cover and is fixed to the pot cover, and the exhaust pipe is connected to the inside and outside of the pot body; The sealing surface of the spherical metal valve core is in close contact with the exhaust port of the exhaust pipe to form a seal for the exhaust port.
8. The pressure cooker according to claim 7, characterized in that A chamfer is formed at the exhaust port of the exhaust pipe, and the sealing surface of the spherical metal valve core is in close contact with the chamfer to form a seal for the exhaust port.
9. The pressure cooker according to claim 7, characterized in that A rounded corner is formed at the exhaust port of the exhaust pipe, and the sealing surface of the spherical metal valve core is in close contact with the rounded corner to form a seal for the exhaust port.
10. The pressure cooker according to claim 7, characterized in that A sharp corner is formed at the exhaust port of the exhaust pipe, and the sealing surface of the spherical metal valve core is in close contact with the sharp corner to form a seal for the exhaust port.