An anti-dumping pressure limiting valve

Abstract

An anti-dumping pressure-limiting valve is used for the exhaust pipe of a high-pressure cooking appliance, comprising a valve cap, a valve body and a valve core. The upper part of the valve core passes through the valve body and connects to the valve cap. A reset elastic body is arranged in the middle hole of the top of the valve body. A spherical groove is arranged in the middle of the upper bottom surface of the valve cap and the upper surface of the reset elastic body. The two spherical grooves are continuously transitioned to form a spherical cavity. The upper part of the valve core is a sphere and is freely rotatable in the spherical cavity. The middle part is a column with a smaller size. The middle hole of the reset elastic body is sleeved on the column. The pressure-limiting valve structure of the present invention is not easy to tilt during exhaust operation, and can ensure uniform contact between the valve core and the exhaust pipe port, so as to improve the sealing performance, ensure the stability of the working pressure, and prevent water overflow.

Description

Technical Field

[0001] The invention relates to the technical field of kitchen cooking utensils, and in particular to an anti-dumping pressure-limiting valve. Background Art

[0002] A pressure cooker is also called a pressure cooker or a pressure cooker. It is a kind of kitchen cookware. The pressure cooker uses the physical phenomenon that the boiling point of liquid increases under high pressure to apply pressure to water, so that the water can reach a higher temperature without boiling, thereby speeding up the efficiency of stewing food. It is mainly composed of a pot body, a pot lid, a sealing rubber ring, a venting channel and a safety pressure limiting valve.

[0003] like Figure 1 and Figure 2 As shown in the figure, the common pressure limiting valve for pressure cookers on the market now includes a valve cap, a valve body and a valve core. The valve core is basically rigidly connected to the main body of the pressure limiting valve. When the pressure in the pot reaches the working pressure, the high-pressure gas in the pot pushes the pressure limiting valve open from the exhaust pipe to maintain the pressure in the pot. The pressure limiting valve will tilt under the impact of the gas, which causes the valve core and the exhaust pipe port to be misaligned and only form point contact, resulting in a large gap ( Figure 1 and Figure 2 The pressure in the pot will be lower than the rated working pressure, and the boiling water in the pot will easily overflow from the exhaust pipe, and the pressure limiting valve may even be pushed off the exhaust pipe and lose its function. Summary of the invention

[0004] The present invention aims to solve the problems of the prior art and provides an anti-dumping pressure-limiting valve which is not easy to tilt during exhaust operation and can ensure uniform contact between the valve core and the exhaust pipe port, thereby improving the sealing performance, ensuring stable working pressure, and preventing water overflow.

[0005] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0006] An anti-dumping pressure-limiting valve is used for the exhaust pipe of a high-pressure cooking appliance, comprising a valve cap, a valve body and a valve core. The upper part of the valve core passes through the valve body and is connected to the valve cap. A reset elastic body is arranged in the middle hole of the top of the valve body. A spherical groove is arranged in the middle of the upper bottom surface of the valve cap and the upper surface of the reset elastic body. The two spherical grooves are continuously transitioned to form a spherical cavity. The upper part of the valve core is a sphere and is freely rotatable in the spherical cavity. The middle part is a column with a smaller size. The middle hole of the reset elastic body is sleeved on the column. The upper part of the valve core is equivalent to the structure of the ball head. The valve cap, the valve body and the reset elastic body constitute a structure equivalent to the ball head seat. The upper sphere of the valve core rotates freely in the spherical cavity, and the valve core can swing at a limited angle. The reset elastic body plays the role of resetting the valve core to its initial position after swinging.

[0007] Preferably, a threaded structure is provided between the inner wall of the bottom of the valve bonnet and the outer wall of the valve body, and the valve bonnet and the valve body are tightly connected via the thread.

[0008] Preferably, a ring groove is provided on the top surface of the valve body, and a sealing ring is provided in the ring groove, which is squeezed by the valve cap and the valve body to perform a sealing function after assembly.

[0009] Preferably, an annular groove is provided on the inner wall at the bottom of the valve body, and a retaining spring is provided in the annular groove. When the pressure limiting valve is lifted up, the retaining spring clamps the upper part of the exhaust pipe, so that the pressure limiting valve is not easy to fall out during operation.

[0010] Preferably, the contact surface between the valve body and the reset elastic body is set as a step structure that offsets each other, so as to avoid displacement of the reset elastic body and play a role in limiting stability.

[0011] Preferably, the lower portion of the valve core is spherical or conical.

[0012] Preferably, the inner wall of the pipe opening of the exhaust pipe is configured as a truncated cone slope or a concave spherical curved surface, and the lower portion of the valve core forms a sealing contact with the pipe opening of the exhaust pipe.

[0013] Preferably, the valve core is made of copper, stainless steel, ceramic or glass, and has good wear resistance.

[0014] Preferably, the reset elastic body is made of silicone rubber, which has outstanding heat resistance and can work for a long time at high temperature while maintaining elasticity.

[0015] The beneficial effects of the present invention are as follows: the pressure limiting valve structure of the present invention is not easy to tilt during exhaust operation, and can ensure uniform contact between the valve core and the exhaust pipe port, thereby achieving the effects of improving sealing, ensuring stable working pressure, and preventing water overflow. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the prior art;

[0017] Figure 2 It is another structural schematic diagram of the prior art;

[0018] Figure 3 is a cross-sectional view of the present invention;

[0019] Figure 4 It is a partial cross-sectional view of the location of the reset elastic body in the present invention (with the valve core hidden);

[0020] Figure 5 It is a cross-sectional view of the working state of the present invention;

[0021] Figure 6 yes Figure 5 A magnified schematic diagram of center A.

[0022] Explanation of the main component symbols in the figure: 1. Valve bonnet, 2. Valve body, 3. Valve core, 4. Reset elastic body, 5. Sealing ring, 6. Retaining spring, 7. Exhaust pipe, 100. Spherical cavity, 200. Threaded structure, 300. Step structure. DETAILED DESCRIPTION

[0023] The present invention will be further described below through specific implementation modes and accompanying drawings.

[0024] The implementation method is: Figure 3-4 As shown, an anti-dumping pressure-limiting valve is used for an exhaust pipe 7 of a high-pressure cooking appliance, comprising a valve cap 1, a valve body 2 and a valve core 3. A threaded structure 200 is provided between the inner wall at the bottom of the valve cap 1 and the outer wall of the valve body 2. In addition, an annular groove is provided on the top surface of the valve body 2, a sealing ring 5 is provided in the annular groove, and an annular groove is provided on the inner wall at the bottom of the valve body 2, a retaining spring 6 is provided in the annular groove.

[0025] The upper part of the valve core 3 is spherical, the middle part is a smaller cylinder, and the lower part is spherical or conical. The inner wall of the pipe opening of the corresponding exhaust pipe 7 is set as a truncated cone slope or a concave spherical curved surface. A reset elastic body 4 is arranged in the middle hole of the top of the valve body 2. A spherical groove is arranged in the middle of the upper bottom surface of the valve cap 1 and the upper surface of the reset elastic body 4. The two spherical grooves are continuously transitioned to form a spherical cavity 100. The upper sphere of the valve core 3 is freely rotatable in the spherical cavity 100, and the middle hole of the reset elastic body 4 is sleeved on the middle cylinder. Among them, the contact surface between the valve body 2 and the reset elastic body 4 is set as a step structure 300 that abuts against each other.

[0026] In addition, the valve core 3 is made of one of wear-resistant copper, stainless steel, ceramic or glass, and the reset elastic body 4 is made of high-temperature resistant silicone rubber.

[0027] The assembly process is that the upper ball of the valve core 3 passes through the hole of the valve body 2 and extends out from the top of the valve body 2, the reset elastic body 4 is inserted into the upper ball of the valve core 3, the middle hole is sleeved on the middle column of the valve core 3, and then embedded in the hole of the valve body 2, and installed in place through the step structure 300, the sealing ring 5 is placed in the annular groove on the top surface of the valve body 2, and the retaining spring 6 is inserted into the groove of the valve body 2 to form an integral component, and the integral component assembled with the valve body 2, valve core 3, reset elastic body 4, sealing ring 5, and retaining spring 6 is screwed into the valve cap 1, and is tightly connected through the threaded structure 200 of the valve body 2 and the valve cap 1.

[0028] Combination Figure 5-6As shown, during the working process, when the pressure in the pot reaches the working pressure, the high-pressure gas in the pot lifts up the pressure-limiting valve to exhaust to keep the pressure in the pot within the working pressure range. At this time, the whole (pressure-limiting valve body) composed of the valve cap 1 and the valve body 2 is under the action of gravity inertia, and the valve core 3 can swing relative to the pressure-limiting valve body, so the vertical posture of the pressure-limiting valve body remains unchanged, the pressure-limiting valve body only moves horizontally but does not tilt, and the valve core 3 swings at an angle relative to the pressure-limiting valve body, and does not misalign with the exhaust pipe port to form a Figure 1 and Figure 2 When the valve core 3 swings, it squeezes the reset elastic body 4 and deforms it (such as Figure 6 The right side of the middle column of the valve core 3 is in contact with the reset elastic body 4), and under the elastic force of the reset elastic body 4, the valve core 3 will return to the initial position coaxial with the pressure limiting valve body, thereby driving the pressure limiting valve body to return to the initial position. In this process, the pressure limiting valve is always in a vertical posture so that the valve core 3 can maintain close contact with the uniform gap of the exhaust pipe 7.

[0029] The above description is only a specific embodiment of the present invention, but the structural features of the present invention are not limited thereto. The present invention can be used on similar products. Any changes or modifications made by any technician in the field of the present invention are covered by the patent scope of the present invention.

Claims

1. An anti-dumping pressure-limiting valve for an exhaust pipe (7) of a high-pressure cooking appliance, comprising a valve cap (1), a valve body (2) and a valve core (3), wherein the upper portion of the valve core (3) passes through the valve body (2) and is connected to the valve cap (1), and is characterized in that: A reset elastic body (4) is provided in the middle hole at the top of the valve body (2); a spherical groove is provided in the middle of the upper bottom surface of the valve cap (1) and the upper surface of the reset elastic body (4); the two spherical grooves are continuously transitioned to form a spherical cavity (100); the upper part of the valve core (3) is in the form of a sphere and is freely rotatable in the spherical cavity (100); the middle part is in the form of a smaller cylinder, and the middle hole of the reset elastic body (4) is sleeved on the cylinder; The lower part of the valve core (3) is in the shape of a sphere or a cone; The inner wall of the pipe opening of the exhaust pipe (7) is configured as a truncated cone inclined surface or a concave spherical curved surface.

2. The anti-dumping pressure-limiting valve according to claim 1, characterized in that: A threaded structure (200) is provided between the inner wall of the bottom of the valve cap (1) and the outer wall of the valve body (2).

3. The anti-dumping pressure-limiting valve according to claim 2, characterized in that: The top surface of the valve body (2) is provided with an annular groove, and a sealing ring (5) is provided in the annular groove.

4. The anti-dumping pressure-limiting valve according to claim 1, characterized in that: An annular groove is provided on the inner wall of the bottom of the valve body (2), and a retaining spring (6) is provided in the annular groove.

5. The anti-dumping pressure-limiting valve according to claim 1, characterized in that: The contact surfaces between the valve body (2) and the reset elastic body (4) are provided as abutting step structures (300).

6. An anti-dumping pressure-limiting valve according to any one of claims 1 to 5, characterized in that: The valve core (3) is made of one of copper, stainless steel, ceramic or glass.

7. An anti-dumping pressure-limiting valve according to any one of claims 1 to 5, characterized in that: The material of the resetting elastic body (4) is silicone rubber.

Images