A pressure limiting valve facilitating rust prevention and a cooking utensil

Abstract

The utility model discloses a kind of pressure-limiting valve and cooking utensil convenient to prevent rust, belong to cooking utensil technical field, purpose is to overcome the defects of the existing pressure-limiting valve not easy to electroplate rust prevention. Pressure-limiting valve includes annular valve body, further include bonnet, valve cover and valve tip, the valve cover has the first chamber with opening downwards, the sealing tip of the valve tip is in the first chamber, the valve body is sleeved in the outside of the valve cover, the bonnet is covered in the upper end portion of the valve cover, the lower end of the bonnet is abutted in the upper end of the valve body. Since valve body is sleeved in the outside of bonnet, the contact amount of valve body and steam is less, not easy to rust, and valve body is external, convenient to electroplate operation to valve body, convenient to rustproof to valve body.

Description

Technical Field

[0001] This utility model belongs to the technical field of cooking utensils, and relates to a pressure relief valve and cooking utensil that are easy to prevent rust. Background Technology

[0002] Existing pressure cooker pressure relief valves primarily regulate the pressure cooker's working pressure through the weight of the valve body. The weight of the valve body determines the pressure cooker's rated working pressure. The valve body is made of metal, and to reduce material and processing costs, current pressure relief valves are typically manufactured by forming iron parts, machining them, and then electroplating them. However, during use, the valve body rusts due to contact corrosion in the acidic, alkaline, oily, and salty steam environment. The deep cavities of the valve body make electroplating difficult, resulting in significant rusting within the valve body's cavities. Summary of the Invention

[0003] This utility model addresses the problems existing in the prior art by proposing a pressure relief valve and cooking appliance that is easy to prevent rust, with the aim of overcoming the defect that an existing pressure relief valve is not easy to electroplate for rust prevention.

[0004] This utility model is implemented as follows:

[0005] A pressure relief valve for easy rust prevention includes an annular valve body, characterized in that it further includes a valve cap, a valve cover, and a valve tip, wherein the valve cover has a first chamber with an opening facing downward, the sealing tip of the valve tip is located in the first chamber, the valve body is sleeved on the outside of the valve cover, the valve cap is placed on the upper end of the valve cover, and the lower end of the valve cap abuts against the upper end of the valve body.

[0006] The lower sidewall of the valve cover has an outwardly protruding support portion, and the inner sidewall of the valve body has a first step that abuts against the upper end of the support portion.

[0007] The upper end of the valve tip passes through the top wall of the first chamber and is fixedly connected to the valve cap.

[0008] The upper end of the valve tip has an external thread, the valve cap has a threaded cavity that engages with the external thread for fixation, and the valve tip has a second step that abuts against the lower surface of the top wall.

[0009] The upper end of the sealing tip has a polygonal operating part.

[0010] The upper end of the valve cover is provided with an upward-facing non-circular groove, and the valve cap has an anti-rotation part that matches the non-circular groove and is embedded in the non-circular groove.

[0011] A deformation cavity is provided between the side wall of the threaded cavity and the anti-rotation part; a sealing ring is provided between the side wall of the threaded cavity and the top wall.

[0012] The upper end of the valve body has a boss on one side near the valve cover, and the valve cap has an extension wall surrounding the outside of the valve cover, with a clearance cavity between the extension wall and the outer wall of the valve cover.

[0013] A retaining ring is embedded in the inner wall of the first chamber, and the upper end of the valve cap has an upward-facing annular groove, in which an annular insert is fixed.

[0014] A cooking appliance, characterized in that it includes a cover and the aforementioned pressure-limiting valve, wherein the cover is provided with an exhaust column, the exhaust column having an exhaust hole, and the pressure-limiting valve covers the exhaust column.

[0015] The present invention has the following advantages: Since the valve body is sleeved on the outside of the valve cap, the valve body has less contact with steam, making it less prone to rusting. In addition, the external valve body facilitates electroplating and rust prevention. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the pressure relief valve.

[0017] Figure 2 This is a schematic diagram of the exploded structure of a pressure relief valve;

[0018] Figure 3 This is a cross-sectional view of the pressure relief valve.

[0019] Figure 4 This is a schematic diagram of the valve tip.

[0020] Figure labeling: 100, valve body; 110, first step; 120, boss; 200, valve cap; 210, threaded cavity; 220, anti-rotation part; 230, deformation cavity; 240, sealing ring; 250, extension wall; 251, clearance cavity; 300, valve cover; 310, first chamber; 320, support part; 330, top wall; 340, non-circular groove; 400, valve tip; 410, sealing tip; 420, external thread; 430, second step; 440, operating part; 500, snap ring; 600, insert. Detailed Implementation

[0021] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, so as to make the technical solution of this utility model easier to understand and master. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0022] This embodiment provides a pressure cooker, which is a specific application of the innovative solution of this utility model in a pressure cooker. The pressure-limiting valve of this utility model can also be applied to other cooking appliances that require pressure cooking. The pressure cooker includes a lid, on which there is a vent column and a pressure-limiting valve. The vent column has a vent hole, and the pressure-limiting valve is located on the vent column. Figure 1-4 As shown, the pressure relief valve includes an annular valve body 100, a valve cap 200, a valve cover 300, and a valve tip 400. The valve cover 300 has a first chamber 310 with its opening facing downwards. The sealing tip 410 of the valve tip 400 is located within the first chamber 310. The valve body 100 is fitted over the outside of the valve cover 300. The valve cap 200 covers the upper end of the valve cover 300, and the lower end of the valve cap 200 abuts against the upper end of the valve body 100. The valve tip 400 can block or release the vent hole.

[0023] Because the valve body 100 is fitted onto the outside of the valve cap 200, the valve body 100 has less contact with steam, making it less prone to rust. Furthermore, the external placement of the valve body 100 facilitates electroplating, thus reducing rust. One advantage of this invention is the ease of electroplating for rust prevention. The valve body 100 does not necessarily require electroplating; in other alternative embodiments, the valve body 100 can be made of stainless steel without electroplating.

[0024] like Figure 2 , 3 As shown, the lower sidewall of the valve cover 300 has an outwardly protruding support portion 320, and the inner sidewall of the valve body 100 has a first step 110 that abuts against the upper end of the support portion 320. Thus, the valve cap 200 abuts against the valve body 100, locking the valve body 100 onto the valve cover 300, facilitating the assembly and disassembly of the valve body 100. In other alternative embodiments, the valve body 100 can also be fixed to the valve cover 300 by threads or an interference fit.

[0025] like Figure 3 , 4 As shown, the upper end of the valve tip 400 passes through the top wall 330 of the first chamber 310 and is fixedly connected to the valve cap 200. Specifically, the upper end of the valve tip 400 has an external thread 420, the valve cap 200 has a threaded cavity 210 that engages with the external thread 420 for fixation, and the valve tip 400 has a second step 430 that abuts against the lower surface of the top wall 330. In this way, the valve tip 400 can lock and fix the valve cap 200 onto the valve cover 300.

[0026] like Figure 4 As shown, the upper end of the sealing tip 410 has a polygonal operating portion 440. The operating portion 440 can be a hexagonal prism, which facilitates the rotation of the valve tip 400 by a sleeve tool.

[0027] like Figure 2 As shown, the upper end of the valve cover 300 is provided with an upward-facing non-circular groove 340, and the valve cap 200 has an anti-rotation part 220 that matches the non-circular groove 340 and is embedded in the non-circular groove 340. This prevents the valve cap 200 and the valve cover 300 from rotating relative to each other.

[0028] like Figure 3 As shown, a deformation cavity 230 is provided between the side wall of the threaded cavity 210 and the anti-rotation part 220. This facilitates the pre-fixation of the anti-rotation part 220 within the non-circular groove 340, making it easier to further tighten the valve tip 400. A sealing ring 240 is provided between the side wall of the threaded cavity 210 and the top wall 330. This improves the fastening effect of the valve cap 200 and the valve cover 300, and also prevents steam from entering the deformation cavity 230, thus helping to keep the deformation cavity 230 clean. In this embodiment, the non-circular groove 340 is a D-shaped groove. In other optional embodiments, the non-circular groove 340 can also be a square groove.

[0029] like Figure 3 As shown, the upper end of the valve body 100 has a boss 120 near the valve cover 300, and the valve cap 200 has an extension wall 250 surrounding the outer side of the valve cover 300. A clearance cavity 251 is provided between the extension wall 250 and the outer wall of the valve cover 300. The different heights of the bosses 120 correspond to different weights of the valve body 100. The clearance cavity 251 facilitates the insertion of bosses 120 of different heights, allowing the valve cover 300 and valve cap 200 to accommodate valve bodies 100 of varying weights.

[0030] like Figure 2 , 3 As shown, a retaining spring 500 is embedded in the inner wall of the first chamber 310. The retaining spring 500 can be locked onto the exhaust column to prevent the pressure relief valve from detaching from the exhaust column. The upper end of the valve cap 200 has an upward-facing annular groove, in which an annular insert 600 is fixed.

[0031] The above description is merely a specific embodiment of the utility model, but the scope of protection of the utility model is not limited thereto. Those skilled in the art should understand that the utility model includes, but is not limited to, the content described in the accompanying drawings and the specific embodiments above. Any modifications that do not depart from the functional and structural principles of the utility model will be included within the scope of the claims.

Claims

1. A pressure relief valve that facilitates rust prevention, comprising an annular valve body (100), characterized in that, It also includes a valve cap (200), a valve cover (300), and a valve tip (400). The valve cover (300) has a first chamber (310) with its opening facing downwards. The sealing tip (410) of the valve tip (400) is located in the first chamber (310). The valve body (100) is sleeved on the outside of the valve cover (300). The valve cap (200) covers the upper end of the valve cover (300), and the lower end of the valve cap (200) abuts against the upper end of the valve body (100).

2. The pressure relief valve for easy rust prevention according to claim 1, characterized in that, The lower sidewall of the valve cover (300) has an outwardly protruding support portion (320), and the inner sidewall of the valve body (100) has a first step (110) that abuts against the upper end of the support portion (320).

3. The pressure relief valve for easy rust prevention according to claim 1, characterized in that, The upper end of the valve tip (400) passes through the top wall (330) of the first chamber (310) and is fixedly connected to the valve cap (200).

4. A pressure relief valve for easy rust prevention according to claim 3, characterized in that, The upper end of the valve tip (400) has an external thread (420), the valve cap (200) has a threaded cavity (210) that is fixed to the external thread (420), and the valve tip (400) has a second step (430) that abuts against the lower surface of the top wall (330).

5. A pressure relief valve for easy rust prevention according to claim 1, characterized in that, The upper end of the sealing tip (410) has a polygonal operating part (440).

6. A pressure relief valve for easy rust prevention according to claim 4, characterized in that, The upper end of the valve cover (300) is provided with an upward-facing non-circular groove (340), and the valve cap (200) has an anti-rotation part (220) that matches the non-circular groove (340) and is embedded in the non-circular groove (340).

7. A pressure relief valve for easy rust prevention according to claim 6, characterized in that, The threaded cavity (210) has a deformation cavity (230) between its sidewall and the anti-rotation part (220); a sealing ring (240) is provided between the sidewall of the threaded cavity (210) and the top wall (330).

8. A pressure relief valve for easy rust prevention according to claim 1, characterized in that, The upper end of the valve body (100) near the side of the valve cover (300) has a boss (120), and the valve cap (200) has an extension wall (250) surrounding the outside of the valve cover (300), and a relief cavity (251) is provided between the extension wall (250) and the outer wall of the valve cover (300).

9. A pressure relief valve for easy rust prevention according to claim 1, characterized in that, A retaining ring (500) is embedded in the inner wall of the first chamber (310), and the upper end of the valve cap (200) has an annular groove with an upward opening, and an annular insert (600) is fixed in the annular groove.

10. A cooking utensil, characterized in that, The device includes a cover and a pressure relief valve as described in any one of claims 1-9, wherein the cover is provided with an exhaust column, the exhaust column has an exhaust hole, and the pressure relief valve covers the exhaust column.

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