Pressure limiting valve, pressure cooker cover and pressure cooker

Abstract

The utility model provides a pressure limiting valve, a pressure cooker cover and a pressure cooker. The pressure limiting valve comprises an exhaust pipe; the valve element is installed on the exhaust pipe from top to bottom, and a first connecting part is arranged at the top of the valve element; the valve seat is connected to the exhaust pipe, the valve seat is provided with a second connecting part, and the second connecting part is arranged above the first connecting part at an interval; when the second connecting part is separated from the first connecting part, the valve element can slide up and down along the exhaust pipe so as to open or close the exhaust pipe; when the second connecting part is connected with the first connecting part, the valve element is hung and fixed to the valve seat, and the exhaust pipe is kept in an open state. The pressure in the pot can be quickly released, and the use requirement that the pressure pot cover is immediately opened after food cooking is completed is met.

Description

Technical Field

[0001] The present application relates to the technical field of kitchen appliances, and in particular to a pressure limiting valve, a pressure cooker cover, and a pressure cooker. Background Art

[0002] A pressure cooker is a common cooking appliance. Its primary function is to increase the temperature and speed of cooking by increasing the pressure inside the cooker. A pressure cooker consists of a lid and a pot body, secured together by means of snaps or other means. The lid is typically equipped with a pressure-limiting valve to control the pressure inside. After cooking, the pressure inside the pot remains high, and the lid cannot be opened immediately. Therefore, the pressure needs to be released quickly. Utility Model Content

[0003] The present application provides a pressure limiting valve, a pressure cooker lid and a pressure cooker, which can quickly release the pressure in the pot and meet the demand of opening the pressure cooker lid immediately after the food is cooked.

[0004] A first aspect of the present application provides a pressure limiting valve, comprising:

[0005] exhaust pipe;

[0006] A valve core is installed on the exhaust pipe from top to bottom, and a first connecting portion is provided on the top of the valve core;

[0007] a valve seat connected to the exhaust pipe, the valve seat being provided with a second connecting portion, the second connecting portion being spaced apart and disposed above the first connecting portion;

[0008] When the second connection portion is separated from the first connection portion, the valve core can slide up and down along the exhaust pipe to open or close the exhaust pipe;

[0009] When the second connection portion and the first connection portion are connected to each other, the valve core is suspended and fixed on the valve seat, and the exhaust pipe remains in an open state.

[0010] The pressure-limiting valve provided in the present application includes an exhaust pipe, a valve core, and a valve seat. The valve core is mounted on the exhaust pipe from top to bottom, and a first connection portion is provided on the top of the valve core. The valve seat is connected to the exhaust pipe and is provided with a second connection portion, which is spaced apart above the first connection portion. When the second connection portion is separated from the first connection portion, the valve core can slide up and down along the exhaust pipe to open or close the exhaust pipe, thereby meeting the high-pressure cooking requirements of the pressure cooker. In addition, the second connection portion forms an axial limit above the first connection portion to prevent the valve core from moving upward excessively and falling out of the exhaust pipe due to the impact of high-pressure gas. When the second connection portion is connected to the first connection portion, the valve core is suspended and fixed to the valve seat, the exhaust pipe remains open, and the gas in the pot can be continuously discharged through the exhaust pipe, thereby quickly releasing the pressure in the pot, meeting the user requirement of opening the pressure cooker lid immediately after cooking.

[0011] Optionally, the first connecting portion and the second connecting portion are mutually attractive magnetic components. On the one hand, magnetic attraction enables reliable connection and rapid separation, and does not cause wear and tear after multiple separation operations, thus providing a long service life. On the other hand, magnetic attraction only generates an adsorption force perpendicular to the contact surface, without forming a circumferential constraint. This allows the valve core to quickly exhaust air while also meeting various requirements such as rotational cleaning as needed.

[0012] Optionally, the valve seat includes: a main body connected to the exhaust pipe; an extension portion, which extends upward from the edge of the main body to above the valve core, and the second connecting portion is arranged at one end of the extension portion away from the main body so that the extension portion avoids the central area where the valve core and thermal insulation member are located, thereby avoiding interference between the extension portion and the valve core or thermal insulation member.

[0013] Optionally, the main body is an annular structure that sleeves onto the exhaust pipe, and the extensions are multiple, each of which is spaced apart circumferentially around the main body, and each of which is interconnected at one end away from the main body. This creates a strong cage-like structure for the valve seat as a whole, preventing the extensions from bending, deforming, or breaking. The extensions surround the periphery of components such as the valve core, providing some protection and preventing burns from excessive proximity to the valve core. The spaces between adjacent extensions create operating spaces, allowing the user to lift or release the valve core as needed.

[0014] Optionally, the main body is an annular structure that is sleeved on the exhaust pipe, and an annular cofferdam is protruding from the top of the main body, so that the main body is a cavity-like structure with an opening facing upward, thereby collecting liquids such as condensed water generated during the exhaust process, preventing the liquid from contaminating the pressure cooker lid or stove and other parts, and improving the user experience.

[0015] Optionally, the valve core includes: a sealing portion, located above the exhaust pipe to open or close the exhaust pipe; and a flow guide portion, located above the sealing portion, the flow guide portion having a downwardly opening cavity-like structure, the inner cavity of the flow guide portion being provided with an annular air guide groove. When the sealing portion opens the exhaust pipe, gas continuously enters the inner cavity of the flow guide portion and rotates along the air guide groove within the inner cavity of the flow guide portion, thereby enabling the valve core to rotate rapidly, achieving the purpose of automatically clearing blockages such as food residues, and effectively reducing the risk of clogging of the pressure limiting valve during use.

[0016] Optionally, the valve core further includes a rod portion, which is located below the sealing portion and extends axially along the valve core, and the rod portion is inserted into the exhaust pipe. On the one hand, the rod portion guides the valve core inside the exhaust pipe, thereby improving the relative position accuracy of the valve core and the exhaust pipe, ensuring that the valve core can accurately close the exhaust hole, and allowing a portion of the valve core to sink inside the exhaust pipe, thereby reducing the external volume of the pressure-limiting valve, improving the compactness of the overall structure of the pressure-limiting valve, and improving the appearance of the pressure cooker lid; on the other hand, the rod portion forms an annular gap inside the exhaust pipe, and exhaust is carried out through the annular gap, which can act as a filter to prevent blockages such as food residues from entering the exhaust pipe, thereby reducing the risk of exhaust pipe blockage.

[0017] Optionally, the pressure-limiting valve further includes a counterweight, located below the exhaust pipe and detachably connected to the rod. Positioning the counterweight on the inner side of the lid reduces the volume of the pressure-limiting valve exposed outside the lid, improving the compactness and aesthetics of the pressure cooker lid. Furthermore, the gap between the top surface of the counterweight and the bottom surface of the exhaust pipe limits the axial movement of the valve core along the exhaust pipe, preventing the valve core from separating from the exhaust pipe and falling.

[0018] Optionally, the pressure-limiting valve further includes a heat-insulating member, which is positioned over the maximum diameter of the valve core. The heat-insulating member has at least one handle protruding from its outer edge. A user grasps the handle of the heat-insulating member to lift the valve core, thereby providing excellent heat insulation and preventing burns, thereby preventing accidents such as burns during operation of the valve core.

[0019] The second aspect of the present application provides a pressure cooker lid, which includes a lid body and any one of the pressure-limiting valves provided in the present application, wherein the exhaust pipe is provided through the lid body and is connected and fixed to the lid body. When the second connecting portion is separated from the first connecting portion, the valve core can slide up and down along the exhaust pipe to open or close the exhaust pipe, thereby meeting the high-pressure cooking requirements of the pressure cooker. In addition, the second connecting portion forms an axial limit above the first connecting portion to prevent the valve core from moving upward excessively and falling out of the exhaust pipe under the impact of high-pressure gas. When the second connecting portion is connected to the first connecting portion, the valve core is suspended and fixed to the valve seat, the exhaust pipe remains open, and the gas in the pot can be continuously discharged through the exhaust pipe, thereby quickly releasing the pressure in the pot, meeting the requirement of opening the pressure cooker lid immediately after the food is cooked.

[0020] A third aspect of the present application provides a pressure cooker, comprising a cooker body and any one of the pressure cooker lids provided herein, wherein the pressure cooker lid is movably connected to the cooker body and can achieve a sealing engagement with the cooker body. When the second connecting portion is separated from the first connecting portion, the valve core can slide up and down along the exhaust pipe to open or close the exhaust pipe, thereby meeting the high-pressure cooking requirements of the pressure cooker. Furthermore, the second connecting portion forms an axial limiter above the first connecting portion to prevent the valve core from moving upward excessively and falling out of the exhaust pipe under the impact of high-pressure gas. When the second connecting portion is connected to the first connecting portion, the valve core is suspended and fixed to the valve seat, the exhaust pipe remains open, and the gas in the cooker can be continuously discharged through the exhaust pipe, thereby quickly releasing the pressure in the cooker and meeting the requirement of opening the pressure cooker lid immediately after cooking.

[0021] It should be understood that the foregoing general description and the following detailed description are merely illustrative and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic diagram of a portion of the structure of a pressure cooker lid provided in an embodiment of the present application;

[0023] Figure 2 for Figure 1 A top view of

[0024] Figure 3 for Figure 1 Schematic diagram of the cross-section structure;

[0025] Figure 4 A schematic structural diagram of the valve core provided in an embodiment of the present application.

[0026] Reference numerals:

[0027] 1- Exhaust pipe;

[0028] 2-valve core;

[0029] 2a-first connecting portion;

[0030] 21- sealing portion;

[0031] 22- diversion part;

[0032] 221-air guide groove;

[0033] 23-rod;

[0034] 3-valve seat;

[0035] 3a-second connecting portion;

[0036] 31-main body;

[0037] 311-annular cofferdam;

[0038] 32- extension;

[0039] 4-Counterweight;

[0040] 41- exhaust slot;

[0041] 5- thermal insulation;

[0042] 51- handle;

[0043] 6- nut;

[0044] 7- Cover body.

[0045] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. DETAILED DESCRIPTION

[0046] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0047] In the description of this application, unless otherwise specified or limited, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; unless otherwise specified or explained, the term "plurality" refers to two or more; the terms "connected" and "fixed" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0048] In the description of this specification, it should be understood that the directional words such as "upper" and "lower" described in the embodiments of the present application are described from the perspectives shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it should be understood that when it is mentioned that an element is connected to another element "on" or "under", it can not only be directly connected to the other element "on" or "under", but also indirectly connected to the other element "on" or "under" through an intermediate element.

[0049] like Figure 1-Figure 4 As shown, an embodiment of the present application provides a pressure-limiting valve that can be applied to a lid 7 and, together with the lid 7, constitutes a pressure cooker lid. The pressure-limiting valve includes an exhaust pipe 1 and a valve core 2. The exhaust pipe 1 is used to connect the inside and outside of the lid 7. That is, the upper side of the exhaust pipe 1 is the outer side of the lid 7, and the lower side of the exhaust pipe 1 is the inner side of the lid 7, so that the gas in the pot can be discharged to the outside of the pot through the pressure-limiting valve; the valve core 2 faces the exhaust pipe 1 and can slide along the axial direction of the exhaust pipe 1 to open or close the exhaust pipe 1, thereby allowing the pressure-limiting valve to limit the maximum pressure in the pot.

[0050] Specifically, exhaust pipe 1 is connected and fixed to lid 7 to secure the pressure-limiting valve. Exhaust pipe 1 can be removably connected to lid 7 using a nut 6 or snap fastener, or non-removably connected using welding or integral molding, as long as it secures exhaust pipe 1 to lid 7. When valve core 2 closes exhaust pipe 1, the pot is sealed, increasing the pressure within the pot and meeting the requirements of high-pressure cooking. When valve core 2 opens exhaust pipe 1, the pot is depressurized, and gas within the pot is discharged through exhaust pipe 1, reducing the pressure within the pot.

[0051] The pressure-limiting valve further includes a valve seat 3, which is connected to the exhaust pipe 1. Specifically, the valve seat 3 can be detachably connected to the exhaust pipe 1 using a nut 6, or can be non-detachably connected using welding or integral molding. The valve core 2 is mounted on the exhaust pipe 1 from top to bottom, with a first connection portion 2a provided at the top. The valve seat 3 has a second connection portion 3a, which is spaced above the first connection portion 2a. When the second connection part 3a is separated from the first connection part 2a, the valve core 2 can slide up and down along the exhaust pipe 1 to open or close the exhaust pipe 1, thereby meeting the high-pressure cooking requirements of the pressure cooker. In addition, the second connection part 3a forms an axial limit above the first connection part 2a, which can prevent the valve core 2 from moving upward too much and falling out of the exhaust pipe 1 under the impact of high-pressure gas; when the second connection part 3a and the first connection part 2a are connected to each other, the valve core 2 is suspended and fixed on the valve seat 3, the exhaust pipe 1 remains open, and the gas in the pot can be continuously discharged from the exhaust pipe 1, so that the pressure in the pot can be quickly released, meeting the use requirement of opening the pressure cooker lid immediately after the food is cooked.

[0052] Specifically, when high-pressure cooking is desired, the user separates the first connection portion 2a from the second connection portion 3a, and the valve core 2 automatically closes the exhaust pipe 1 under its own weight. To quickly release the pressure within the pot, the user lifts the valve core 2 upward and connects the first connection portion 2a to the second connection portion 3a, thereby suspending the valve core 2 from the valve seat 3.

[0053] In one embodiment, the first connecting portion 2a and the second connecting portion 3a are mutually attractive magnetic components. For example, one of the first connecting portion 2a and the second connecting portion 3a is a magnet, and the other is a material that can be magnetically attracted, such as iron or a magnet. On the one hand, the magnetic attraction method can achieve reliable connection and rapid separation, and does not cause wear and tear after multiple separation operations, thereby having a long service life. On the other hand, the magnetic attraction method only generates an adsorption force perpendicular to the contact surface and does not form a circumferential constraint. This allows the valve core 2 to quickly exhaust air while achieving various different needs such as rotational cleaning as needed.

[0054] In other embodiments, the first connection portion 2a and the second connection portion 3a may also be connected to each other by any appropriate means such as snap connection, threaded connection, plug-in connection or bonding, as long as an axial force can be provided to the valve core 2 to suspend and fix the valve core 2 to the valve seat 3.

[0055] Furthermore, the pressure-limiting valve includes a thermal insulation member 5. This member is positioned over the maximum diameter of the valve core 2. The user grasps the thermal insulation member 5 to lift the valve core 2, preventing burns and other accidents during operation. At least one handle 51 is protruding from the outer edge of the thermal insulation member 5. This handle 51 increases the local width of the thermal insulation member 5, further enhancing the thermal insulation and anti-scalding effects. If multiple handles 51 are present, they are evenly distributed around the circumference of the thermal insulation member 5 to ensure even weight distribution and prevent the valve core 2 from tilting or other abnormalities.

[0056] Furthermore, the valve seat 3 includes a main portion 31 and an extension portion 32. The main portion 31 is connected to the exhaust pipe 1 to securely mount the valve seat 3. The extension portion 32 extends upward from the edge of the main portion 31 to above the valve core 2. The second connection portion 3a is located at the end of the extension portion 32 away from the main portion 31. This allows the extension portion 32 to avoid the central area where the valve core 2 and the thermal insulation member 5 are located, thereby preventing interference between the extension portion 32 and the valve core 2 or the thermal insulation member 5.

[0057] Furthermore, the main body 31 is an annular structure that is sleeved onto the exhaust pipe 1. This not only increases the mating area between the valve seat 3 and the exhaust pipe 1, improving the reliability of the connection between the valve seat 3 and the exhaust pipe 1, but also enhances the appearance of the pressure-limiting valve. It is understood that in other embodiments, the main body 31 can be connected to one side of the exhaust pipe 1.

[0058] Furthermore, multiple extensions 32 are arranged circumferentially around the main body 31 at intervals. Each extension 32 surrounds the outer circumference of the valve core 2 and other components, providing a protective barrier to prevent burns caused by users getting too close to the valve core 2. The spaces between adjacent extensions 32 create operating spaces, allowing users to lift or release the valve core 2 as needed. The ends of the extensions 32, distal from the main body 31, are interconnected, giving the valve seat 3 a cage-like structure. This increases the structural strength of the valve seat 3 and prevents damage such as bending, deformation, or breakage.

[0059] Furthermore, an annular cofferdam 311 is protruded from the top of the main body 31, so that the main body 31 has a cavity-like structure with an opening facing upward, thereby being able to collect liquids such as condensed water generated during the exhaust process, preventing the liquid from contaminating the pressure cooker lid or stove top, and improving the user experience.

[0060] Furthermore, the valve core 2 includes a sealing portion 21, which is located above the exhaust pipe 1 to open or close the exhaust pipe 1. The side of the sealing portion 21 facing the exhaust pipe 1 can be provided with a conical or curved surface, which forms a seal with the exhaust pipe 1. This reduces the sealing area and increases the reliability of the seal. Furthermore, it provides automatic centering, preventing the valve core 2 from deviating from the exhaust pipe 1 and affecting the sealing effect.

[0061] Furthermore, the valve core 2 also includes a guide portion 22, which is located above the sealing portion 21 and has a downward-opening cavity-like structure. The inner cavity of the guide portion 22 is provided with an annular air guide groove 221. When the sealing portion 21 opens the exhaust pipe 1, gas continuously enters the inner cavity of the guide portion 22 and rotates along the air guide groove 221 in the inner cavity of the guide portion 22, thereby enabling the valve core 2 to rotate rapidly, achieving the purpose of automatically clearing blockages such as food residues, and effectively reducing the risk of clogging of the pressure limiting valve during use.

[0062] Furthermore, the valve core 2 also includes a rod 23, which is located below the sealing portion 21 and extends axially along the valve core 2. The rod 23 is disposed within the exhaust pipe 1. On the one hand, the rod 23 guides the valve core 2 within the exhaust pipe 1, improving the relative positioning accuracy of the valve core 2 and the exhaust pipe 1, ensuring that the valve core 2 can accurately close the exhaust hole. It also allows a portion of the valve core 2 to sink into the exhaust pipe 1, thereby reducing the external volume of the pressure-limiting valve, increasing the compactness of the overall structure of the pressure-limiting valve, and improving the appearance of the pressure cooker lid. On the other hand, the rod 23 forms an annular gap within the exhaust pipe 1, through which exhaust is discharged, acting as a filter to prevent obstructions such as food residue from entering the exhaust pipe 1, thereby reducing the risk of blockage. It is understood that in other embodiments, the valve core 2 may also be provided with a guide structure on the exterior of the exhaust pipe 1.

[0063] Furthermore, the sealing portion 21, the flow guide portion 22, and the stem portion 23 are integrally formed, which can not only reduce processing errors and improve the precision of the valve core 2 itself, but also reduce the number of parts and reduce production costs. It is understood that in other embodiments, any of the sealing portion 21, the flow guide portion 22, and the stem portion 23 can be provided as separate components and connected to each other by means of threaded engagement or the like to form a whole.

[0064] Furthermore, the pressure-limiting valve includes a counterweight 4 connected to the valve core 2. The counterweight 4 and the valve core 2 jointly limit the pressure within the pot, thereby reducing the volume and weight of the valve core 2. The counterweight 4 and the valve core 2 can be connected to each other in a detachable manner such as threaded engagement, or can be connected to each other in a non-detachable manner such as welding or integral molding.

[0065] Furthermore, a counterweight 4 is positioned below the exhaust pipe 1, with a gap between its top surface and the bottom surface of the exhaust pipe 1. The counterweight 4 is detachably connected to the stem 23 of the valve core 2. Positioning the counterweight 4 inside the lid 7 reduces the volume of the pressure-limiting valve exposed outside the lid 7, improving the compactness and aesthetics of the pressure cooker lid. Furthermore, the gap between the top surface of the counterweight 4 and the bottom surface of the exhaust pipe 1 limits the axial travel of the valve core 2 along the exhaust pipe 1, preventing it from falling out of the exhaust pipe 1. Furthermore, the detachable connection of the counterweight 4 to the stem 23 facilitates disassembly and cleaning of the pressure-limiting valve.

[0066] Furthermore, a vent groove 41 is provided on the top surface of the counterweight 4, facing the rod portion 23. The vent groove 41 extends radially along the counterweight 4 and penetrates the edge of the counterweight 4 to prevent the counterweight 4 from completely fitting against the exhaust pipe 1 when the valve core 2 rises, thereby closing the exhaust pipe 1 and affecting the normal discharge of gas. Specifically, when the valve core 2 rises, causing the top surface of the counterweight 4 to abut against the bottom surface of the exhaust pipe 1, the bottom of the vent groove 41 separates from the bottom surface of the exhaust pipe 1, allowing gas to flow into the vent groove 41 along both ends and be discharged from the exhaust pipe 1. In addition, the top surface of the counterweight 4 and the bottom surface of the exhaust pipe 1 abut against each other through a relatively large flat surface, which can prevent them from being damaged by the impact of high-pressure gas, such as indentations. It is understood that in other embodiments, a limiting structure such as a protrusion or a rib can be provided between the counterweight 4 and the exhaust pipe 1 to prevent the counterweight 4 from completely fitting against the exhaust pipe 1.

[0067] Furthermore, the counterweight 4 can be configured as a circular columnar structure with a large diameter and a small height to minimize the distance the counterweight 4 extends downward, thereby preventing the liquid or foam in the pot from coming into contact with the counterweight 4, which could cause contamination or weight change of the counterweight 4. It is understood that in other embodiments, the counterweight 4 can also be configured in other shapes as needed, such as a cone or polygonal column.

[0068] In addition, embodiments of the present application further provide a pressure cooker lid, comprising a lid body 7 and any of the pressure-limiting valves provided in the embodiments of the present application. An exhaust pipe 1 of the pressure-limiting valve is disposed through the lid body 7, thereby enabling communication between the inside and outside of the lid body 7. The exhaust pipe 1 is connected and fixed to the lid body 7, thereby securing the pressure-limiting valve to the lid body 7.

[0069] In addition, an embodiment of the present application further provides a pressure cooker comprising a cooker body and any one of the pressure cooker lids provided herein. The pressure cooker lid is movably connected to the cooker body and can be sealed with the cooker body to generate high pressure in the cooker to meet the requirements of high-pressure cooking.

[0070] The above description is merely a preferred embodiment of the present application and is not intended to limit the present application. Various modifications and variations are possible for those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A pressure limiting valve, characterized in that: include: exhaust pipe (1); A valve core (2), the valve core (2) being mounted on the exhaust pipe (1) from top to bottom, and a first connecting portion (2a) being provided on the top of the valve core (2); A valve seat (3) is connected to the exhaust pipe (1), and the valve seat (3) is provided with a second connecting portion (3a), and the second connecting portion (3a) is spaced apart and arranged above the first connecting portion (2a); When the second connecting portion (3a) and the first connecting portion (2a) are separated from each other, the valve core (2) can slide up and down along the exhaust pipe (1) to open or close the exhaust pipe (1); When the second connecting portion (3a) and the first connecting portion (2a) are connected to each other, the valve core (2) is suspended and fixed on the valve seat (3), and the exhaust pipe (1) remains in an open state.

2. The pressure limiting valve according to claim 1, characterized in that The first connecting portion (2a) and the second connecting portion (3a) are magnetic components that attract each other.

3. The pressure limiting valve according to claim 1, characterized in that The valve seat (3) comprises: A main body (31) connected to the exhaust pipe (1); An extension portion (32) extends upward from the edge of the main body (31) to above the valve core (2), and the second connecting portion (3a) is arranged at an end of the extension portion (32) away from the main body (31).

4. The pressure limiting valve according to claim 3, characterized in that The main body (31) is an annular structure sleeved on the exhaust pipe (1); the extension parts (32) are multiple in number, each of the extension parts (32) is arranged at intervals in the circumferential direction around the main body (31), and one end of each of the extension parts (32) away from the main body (31) is connected to each other.

5. The pressure limiting valve according to claim 3, characterized in that: The main body (31) is an annular structure sleeved on the exhaust pipe (1), and an annular cofferdam (311) is protruding from the top of the main body (31).

6. The pressure limiting valve according to any one of claims 1 to 5, characterized in that: The valve core (2) comprises: a sealing portion (21), the sealing portion (21) being located above the exhaust pipe (1) to open or close the exhaust pipe (1); A flow guide portion (22), the flow guide portion (22) is located above the sealing portion (21), the flow guide portion (22) is a cavity-shaped structure with an opening facing downward, and an annular air guide groove (221) is provided in the inner cavity of the flow guide portion (22).

7. The pressure limiting valve according to claim 6, characterized in that The valve core (2) further comprises a rod portion (23), the rod portion (23) being located below the sealing portion (21) and extending along the axial direction of the valve core (2), and the rod portion (23) being arranged through the exhaust pipe (1).

8. The pressure limiting valve according to claim 7, characterized in that The pressure limiting valve further comprises a counterweight (4), the counterweight (4) being located below the exhaust pipe (1), and the counterweight (4) being detachably connected to the rod (23).

9. The pressure limiting valve according to any one of claims 1 to 5, characterized in that: The pressure-limiting valve further comprises a heat insulating member (5), wherein the heat insulating member (5) is sleeved on the maximum diameter of the valve core (2), and at least one handle (51) is protruded from the outer edge of the heat insulating member (5).

10. A pressure cooker lid, characterized in that: It comprises a cover body and the pressure limiting valve according to any one of claims 1 to 9, wherein the exhaust pipe (1) is passed through the cover body, and the exhaust pipe (1) is connected and fixed to the cover body.

11. A pressure cooker, characterized in that: The pressure cooker comprises a pot body and the pressure cooker cover according to claim 10, wherein the pressure cooker cover is movably connected to the pot body and can achieve sealing cooperation with the pot body.

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