Pressure relief valve for pressure cookers

Abstract

The utility model relates to the technical field of pressure cooker accessories, specifically relates to a pressure relief valve for pressure cooker, and technical scheme main points include valve body, valve core, sealing body and fastening nut, the lower extreme of valve body is matched with fastening nut and is used for assembling and fixing on pressure cooker, the lower extreme inner wall of valve body is provided with annular clamping slot and snap ring, chamber and inclined exhaust passage are provided on valve body, exhaust passage and chamber are communicated, the outer wall of sealing body is provided with cooperation groove, sealing body is matched with snap ring through cooperation groove, the side wall of sealing body is still fixed mutually with clamping slot cooperation, the inside of sealing body is provided with core groove, the lower extreme of valve core is provided with core ring part, core ring part is clamped on core groove and forms elastic sealing, the centre of valve body is provided with core hole, the diameter of core hole is less than core ring part to make valve core be limited by core hole after separating sealing body in the pressure relief process. The utility model improves safety performance, and is convenient for assembling and using.

Description

Technical Field

[0001] This utility model relates to the technical field of pressure cooker accessories, specifically to a pressure relief valve for a pressure cooker. Background Technology

[0002] Pressure cookers are widely used in the catering industry and are also common in households. Pressure cookers are equipped with a pressure relief valve on the lid, primarily to release excess pressure and prevent it from becoming too high. Traditional pressure relief relies on a pressure relief vent, located on the outer circumference. This means that during pressure release, the high-pressure steam is very hot and can easily spray onto the user. Some users may have their hands very close to the pressure relief valve while operating the cooker, increasing the risk of burns. Therefore, safety features need further improvement. Utility Model Content

[0003] In order to solve the technical problems and shortcomings of the prior art, the present invention provides a pressure relief valve for pressure cookers, which can improve safety performance and make it more convenient to use and install.

[0004] To achieve the above and other related objectives, the present invention adopts the following technical solution: A pressure relief valve for a pressure cooker includes a valve body, a valve core, a sealing body, and a fastening nut. The lower end of the valve body mates with the fastening nut and is used to assemble and fix it onto the pressure cooker. The inner wall of the lower end of the valve body is provided with an annular groove and a retaining ring. The valve body is provided with a chamber and an inclined exhaust channel, which communicates with the chamber. The outer wall of the sealing body is provided with a mating groove, and the sealing body mates with the retaining ring through the mating groove. The side wall of the sealing body also mates with the groove and is mutually fixed. The inner side of the sealing body is provided with a core groove. The lower end of the valve core is provided with a core ring portion, which is engaged with the core groove to form an elastic seal. The center of the valve body is provided with a core hole, the diameter of which is smaller than that of the core ring portion so that the valve core is limited by the core hole after it is disengaged from the sealing body during pressure relief.

[0005] Preferably, the sealing body is made of an elastic material, such as POM plastic or silicone plastic.

[0006] Preferably, the upper end of the sealing body is provided with a flared opening, which is used to cooperate with the core ring portion sliding into the core groove.

[0007] Preferably, the upper end of the valve core is provided with an end cap, and a limit cap is sleeved on the end cap, the limit cap being made of an elastic material.

[0008] Preferably, the outlet of the exhaust passage is located at the top of the valve body.

[0009] Preferably, the lower end of the valve body is provided with a threaded portion, the threaded portion is provided with a cut, and the end face of the threaded portion is provided with a groove at at least at both ends of one diameter.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model, through the assembly of the fastening nut and the valve body, allows the valve body to be firmly installed on the pressure cooker. Unlike the traditional design, it features an inclined exhaust channel, which causes the airflow to be inclined upward and outward during the pressure relief process, making it less likely to spray onto or towards the human body. To improve the reliability of the operation, the clamping force of the sealing body and the valve core is used to set the upper limit pressure of the pressure relief. At the same time, the valve core is limited by the core hole, making it less likely to detach from the valve body and allowing for reset and reuse multiple times.

[0011] 2. In this utility model, the flared design allows the valve core to be inserted into the core groove more smoothly and stably, thus achieving reset.

[0012] 3. The limit cap on the end cap can protect the valve core and play an elastic buffering role at the end of the valve core's up and down movement.

[0013] 4. The cuts on the threaded structure of the valve body can improve assembly efficiency, and the slots make it easy to operate with a screwdriver and facilitate tightening.

[0014] Other additional advantages and benefits of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is an overall schematic diagram of an embodiment of this application; Figure 2 This is a structural cross-sectional view of an embodiment of this application; Figure 3 This is an exploded view of the structure of an embodiment of this application.

[0016] Explanation of reference numerals for major components: 1. Valve body; 11. Snap groove; 12. Snap ring; 13. Exhaust passage; 14. Chamber; 15. Core hole; 16. Threaded part; 17. Cutout; 18. Groove; 2. Valve core; 21. Core ring part; 22. End cap; 3. Sealing body; 31. Mating groove; 32. Core groove; 33. Flared mouth; 4. Fastening nut; 5. Pressure cooker mounting position; 6. Limit cap; 7. Sealing ring. Detailed Implementation

[0017] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. The following specific examples illustrate the embodiments of the present invention, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, unless otherwise specified, the following embodiments and features in the embodiments can be combined with each other.

[0018] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The illustrations only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be changed at will, and the layout of the components may also be more complex.

[0019] It should be noted that in the description of this application, the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the invention. Furthermore, it should be noted that in the description of this application, unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two elements. Those skilled in the art can understand the specific meaning of the above terms in the invention based on the specific circumstances. Example

[0020] This invention discloses a pressure relief valve for a pressure cooker, combined with... Figure 1 , Figure 2 and Figure 3 Understanding includes valve body 1, valve core 2, sealing body 3, and fastening nut 4, in Figure 2As can be seen, the lower end of the valve body 1 is fitted with the fastening nut 4 and used to assemble and fix it on the pressure cooker mounting position 5 (partial pressure cooker shown). The lower inner wall of the valve body 1 is provided with an annular groove 11 and a retaining ring 12. The valve body 1 is provided with a chamber 14 and an inclined exhaust channel 13. The exhaust channel 13 and the chamber 14 are connected. The outer wall of the sealing body 3 is provided with a mating groove 31. The sealing body 3 is fitted with the retaining ring 12 through the mating groove 31. The side wall of the sealing body 3 is also fitted with the groove 11 and fixed to each other. The inner side of the sealing body 3 is provided with a core groove 32. The lower end of the valve core 2 is provided with a core ring part 21. The core ring part 21 is snapped into the core groove 32 to form an elastic seal. The center of the valve body 1 is provided with a core hole 15. The diameter of the core hole 15 is smaller than that of the core ring part 21 so that the valve core 2 is limited by the core hole 15 after it is separated from the sealing body 3 during the pressure relief process.

[0021] Based on the above scheme, during assembly, by fastening the nut 4 and the valve body 1, the valve body 1 can be firmly installed on the pressure cooker. Unlike traditional designs, this scheme features an inclined exhaust channel 13, which ensures that the airflow is inclined upwards and outwards during pressure relief and exhaust, making it less likely to spray onto or towards the human body. To improve the reliability of the valve core 2's movement, the clamping force between the sealing body 3 and the valve core 2 is used to set the upper limit pressure for pressure relief. At the same time, the valve core 2 is limited by the core hole 15, making it difficult to detach from the valve body 1 and allowing for multiple resets. When the pressure inside the cooker exceeds the clamping force between the valve core 2 and the sealing body 3, the valve core 2 will be pushed open, allowing air to pass through. The airflow exits from the exhaust channel 13. At this time, while the valve core 2 is pushed open, the core ring 21 on the valve core 2 is limited, preventing it from detaching from the valve body 1. After the pressure relief ends, the valve core 2 can be pressed again to reset it.

[0022] The assembly process of this product is as follows: First, the sealing element can be assembled into the valve body 1 to form a snap-fit ​​fixation. Then, the valve core 2 is passed through the middle of the sealing element from bottom to top. The lower opening of the sealing element also has a guide curved surface to facilitate the insertion of the valve core 2 until the core ring 21 on the valve core 2 is engaged with the core groove 32, or it can be pushed further in to reach the top of the valve body 1. Then, the limiting cap 6 is put on the valve core 2, thus limiting the valve core 2 both vertically and vertically. Next, this component can be placed into the hole on the pressure cooker mounting position 5. By adding a sealing ring 7 to the fastening nut 4, the sealing effect is further improved, thereby achieving stable installation and use of the whole.

[0023] Alternatively, the sealing body 3 can be made of an elastic material, such as POM plastic or silicone plastic. Food-grade elastic plastic can be selected as the sealing body 3, which can work with the valve core 2 to complete reliable sealing and pressure limiting actions.

[0024] To facilitate the reset of the valve core 2, a flared opening 33 is provided at the upper end of the sealing body 3. The flared opening 33 is used to cooperate with the core ring 21 to slide into the core groove 32. The design of the flared opening 33 allows the valve core 2 to be more smoothly and stably inserted into the core groove 32, thus achieving reset.

[0025] To prevent hard impacts on the valve core 2, this design incorporates an end cap 22 at the upper end of the valve core 2. A limit cap 6, made of elastic material, is fitted onto the end cap 22. The limit cap 6 on the end cap 22 protects the valve core 2 and provides elastic cushioning at the end of its vertical movement.

[0026] exist Figure 2 As can be seen, the outlet of the exhaust channel 13 is located at the top of the valve body 1. This prevents the released hot air from being sprayed towards the human body.

[0027] To facilitate assembly and improve assembly efficiency and robustness, the lower end of the valve body 1 is provided with a threaded portion 16, on which a notch 17 is provided. On the end face of the threaded portion 16, at least at both ends of one diameter, a groove 18 is provided. The notch 17 on the threaded portion 16 of the valve body 1 improves assembly efficiency, and the groove 18 facilitates screwdriver operation and tightening. The fastening nut 4 can be secured with a wrench, and then a flathead screwdriver or other similar tool can be inserted into the groove 18. Alternatively, the fastening nut 4 can be rotated to keep the valve body 1 stationary, or the fastening nut 4 can be kept stationary while the valve body 1 is rotated.

[0028] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A pressure relief valve for a pressure cooker, comprising a valve body (1), a valve core (2), a sealing body (3), and a fastening nut (4), wherein the lower end of the valve body (1) engages with the fastening nut (4) and is used for mounting and fixing onto the pressure cooker, characterized in that, The valve body (1) has an annular groove (11) and a retaining ring (12) on its lower inner wall. The valve body (1) has a chamber (14) and an inclined exhaust channel (13) connected to the chamber (14). The outer wall of the sealing body (3) has a mating groove (31). The sealing body (3) is mated with the retaining ring (12) through the mating groove (31). The side wall of the sealing body (3) is also mated with the groove (11) and fixed to each other. The inner side of the sealing body (3) has a core groove (32). The lower end of the valve core (2) has a core ring (21). The core ring (21) is snapped into the core groove (32) to form an elastic seal. The center of the valve body (1) has a core hole (15). The diameter of the core hole (15) is smaller than that of the core ring (21) so that the valve core (2) is limited by the core hole (15) after it is removed from the sealing body (3) during the depressurization process.

2. The pressure relief valve for a pressure cooker according to claim 1, characterized in that, The sealing body (3) is made of elastic material, such as POM plastic or silicone plastic.

3. The pressure relief valve for a pressure cooker according to claim 1, characterized in that, The upper end of the sealing body (3) is provided with a flared mouth (33), which is used to cooperate with the core ring part (21) to slide into the core groove (32).

4. The pressure relief valve for a pressure cooker according to claim 2, characterized in that, The valve core (2) is provided with an end cap (22) at its upper end, and a limit cap (6) is fitted on the end cap (22). The limit cap (6) is made of elastic material.

5. The pressure relief valve for a pressure cooker according to claim 1, characterized in that, The outlet of the exhaust passage (13) is located at the top of the valve body (1).

6. The pressure relief valve for a pressure cooker according to claim 1, characterized in that, The lower end of the valve body (1) is provided with a threaded portion (16), and a cut (17) is provided on the threaded portion (16). A groove (18) is provided on the end face of the threaded portion (16) at least at both ends of one diameter.

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