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 a valve body provided with an exhaust pipe, and the inner side wall of the valve body is convexly provided with a first supporting part; the valve bonnet is rotationally connected to the valve body, and the valve bonnet and the valve body are relatively fixed in the axial direction; the valve element is connected to the valve bonnet in a sliding mode, the valve element is used for opening or closing the exhaust pipe, and a second supporting part is arranged on the outer side wall of the valve element in a protruding mode; the second supporting part is in lap joint with the first supporting part, one of the first supporting part and the second supporting part is a supporting block, and the other one of the first supporting part and the second supporting part is a supporting strip which extends in the circumferential direction and is provided with a lifting face; when the valve bonnet drives the valve element to rotate, the supporting block relatively slides along the supporting strip so as to drive the valve element to slide up and down along the valve bonnet. The stability and the sealing performance of the pressure limiting valve can be improved, external dirt is prevented from entering the pressure limiting valve, and the use experience is improved.

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 main function is to increase the heating temperature by increasing the gas pressure in the pot, thereby increasing the heating speed. The pressure cooker is mainly composed of a pressure cooker lid and a pot body. The pressure cooker lid is usually equipped with a pressure limiting valve. After cooking, it is usually necessary to open the pressure limiting valve to quickly exhaust the air.

[0003] In the prior art, it is usually necessary to move the valve cap up and down or remove it as a whole, resulting in poor stability and sealing of the pressure limiting valve. External dirt can easily enter the interior of the pressure limiting valve, affecting the user experience. Utility Model Content

[0004] The present application provides a pressure limiting valve, a pressure cooker cover and a pressure cooker, so as to improve the stability and sealing of the pressure limiting valve, prevent external dirt from entering the interior of the pressure limiting valve, and improve the user experience.

[0005] A first aspect of the present application provides a pressure limiting valve, comprising:

[0006] The valve body is provided with an exhaust pipe, and the inner side wall of the valve body is convexly provided with a first supporting portion;

[0007] A valve cap is rotatably connected to the valve body, and the valve cap and the valve body are relatively fixed along the axial direction;

[0008] A valve core is slidably connected to the valve cap, the valve core is directly facing the exhaust pipe, and a second supporting portion is convexly provided on the outer side wall of the valve core;

[0009] The second support portion is overlapped with the first support portion, and one of the first support portion and the second support portion is a support block, and the other is a support bar extending in the circumferential direction and having a lifting surface;

[0010] When the valve cap drives the valve core to rotate, the support block slides relatively along the support strip to drive the valve core to slide up and down along the valve cap.

[0011] The pressure-limiting valve provided in the present application includes a valve body, a valve cap and a valve core; the valve body is provided with an exhaust pipe, and a first supporting portion is convexly provided on the inner side wall of the valve body; the valve cap is rotatably connected to the valve body to form the external shape of the pressure-limiting valve, and the valve cap and the valve body are relatively fixed axially; the valve core is slidably connected to the valve cap, and the valve core is used to open or close the exhaust valve, and a second supporting portion is convexly provided on the outer side wall of the valve core; the second supporting portion overlaps the first supporting portion to provide support for the valve core; among the first supporting portion and the second supporting portion, one is a supporting block, and the other is a supporting strip extending circumferentially and having a lifting surface, the supporting block slides along the supporting strip, and when the valve cap drives When the valve core rotates, the support block slides relatively along the support strip to drive the valve core to slide up and down along the valve cap. That is to say, it is only necessary to rotate the external valve cap and drive the support block to slide along the support strip through the valve cap to change the height of the valve core and realize the up and down movement of the internal valve core, thereby opening or closing the exhaust valve. The structure is simple and the operation is convenient. During operation, only the internal valve core moves up and down, while the external valve cap and the valve body do not move relative to each other in the axial direction, so that the overall external shape of the pressure limiting valve remains unchanged, thereby improving the stability and sealing of the pressure limiting valve, effectively preventing external dirt from entering the interior of the pressure limiting valve, and improving the use experience.

[0012] Optionally, the support bar has a platform surface, and the platform surface is arranged at both ends of the lifting surface, so that the valve core can stably stay in the lowest position and the highest position. That is to say, even after the user loosens the valve cap, the valve core can stably stay in the position of closing the exhaust pipe or opening the exhaust pipe, ensuring that the state of the exhaust channel will not change during use.

[0013] Optionally, the number of the support blocks is not less than two, and the support blocks are centrally symmetrically arranged around the axis of the valve body, so that the valve core and the valve body form at least two support points, ensuring that the valve body provides stable support for the valve core;

[0014] The number of the lifting surfaces is an integer multiple of the number of the support blocks, and the lifting surfaces are centrally symmetrically arranged around the axis of the valve body, so that each support block can correspond to at least one lifting surface, and the support blocks can be lifted and lowered synchronously to achieve stable up and down movement of the valve core.

[0015] Optionally, the lifting surfaces on both sides of the highest point of the support bar or the lowest point of the support bar are mirror-symmetrical, so that the lifting directions of the two lifting surfaces on both sides of the highest point or the lowest point are opposite, so that the valve bonnet can achieve the expected adjustment purpose by rotating in the forward and reverse directions without identifying the rotation direction of the valve bonnet, thereby improving the convenience of operation.

[0016] Optionally, the lifting surfaces are connected end to end to form a closed annular structure. On the one hand, the support strip forms a continuous support for the support block, so that the valve core can be installed in any circumferential direction, further improving the convenience of assembling the pressure limiting valve; on the other hand, the valve cap can be rotated in any angle in both positive and negative directions, that is, there is no need to identify the rotation direction and rotation angle of the valve cap, further improving the convenience of operation.

[0017] Optionally, one of the valve core and the valve bonnet is provided with a connecting hole, and the inner wall of the connecting hole is provided with a limiting groove; the other is provided with a connecting column, and the outer wall of the connecting column is convexly provided with a limiting block; the connecting column is inserted into the connecting hole, and the limiting block extends into the limiting groove, thereby playing a circumferential limiting role between the valve core and the valve bonnet, ensuring that the valve core can rotate together with the valve bonnet; the height of the limiting groove is higher than the height of the limiting block, so as to avoid axial interference between the valve core and the valve bonnet, and ensure that the valve core and the valve bonnet can slide relative to each other in the axial direction.

[0018] Optionally, along the circumference of the valve core, the extension angle of the limit groove is greater than the extension angle of the limit block, so that the valve core and the valve cap can each independently rotate at a certain angle, so that the valve core can automatically descend along the lifting surface with the support block, thereby closing the exhaust pipe. That is to say, when closing the exhaust pipe, the angle at which the user rotates the valve cap is smaller than the actual rotation angle of the valve core. The exhaust pipe can be reliably closed by simply gently rotating the valve cap to separate the limit block from the support surface, further improving the convenience of operation and the reliability of use.

[0019] Optionally, the connecting column comprises an elastic cantilever, the elastic cantilever extends along the axial direction of the connecting column, and the limiting block is protruded from the elastic cantilever, so that the connection method is simple and has high connection reliability.

[0020] Optionally, the valve body includes a main body and a mask part, the mask part surrounds the outer side of the main body and forms an annular exhaust groove with the main body; the main body is provided with a first exhaust hole, the first exhaust hole connects the exhaust groove with the inner cavity of the main body; the mask part is provided with a second exhaust hole, the second exhaust hole connects the exhaust groove with the outside of the valve body; the second exhaust hole and the first exhaust hole are staggered along the circumference of the valve body. The exhaust groove cools the gas to prevent the high-temperature gas from being directly ejected and scalding the user, and can also buffer and reduce the noise of the gas to improve the user experience; the second exhaust hole and the first exhaust hole are staggered along the circumference of the valve body to force the gas in the exhaust groove to flow circumferentially, prolonging the residence time of the gas in the exhaust groove, thereby improving the cooling and buffering effects.

[0021] A second aspect of the present application provides a pressure cooker cover, which comprises a cover body and any one of the pressure limiting valves provided in the present application.

[0022] A third aspect of the present application provides a pressure cooker, which comprises a pot body and any one of the pressure cooker lids provided in the present application.

[0023] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the structure of a pressure cooker lid provided in an embodiment of the present application;

[0025] Figure 2 An exploded diagram of a pressure limiting valve provided in an embodiment of the present application;

[0026] Figure 3 A schematic structural diagram of a cross section of a pressure limiting valve provided in an embodiment of the present application;

[0027] Figure 4 A schematic structural diagram of another cross section of the pressure limiting valve provided in an embodiment of the present application;

[0028] Figure 5 A schematic diagram of the structure of the valve body provided in the embodiment of the present application;

[0029] Figure 6 for Figure 5 Schematic diagram of the structure from another angle;

[0030] Figure 7 A schematic diagram of the structure of the valve core provided in an embodiment of the present application;

[0031] Figure 8 It is a cross-sectional view of the valve core and valve bonnet.

[0032] Reference numerals:

[0033] 01-pressure limiting valve;

[0034] 02-cover;

[0035] 1- Valve body;

[0036] 11- Exhaust pipe;

[0037] 12- support block;

[0038] 13- first exhaust hole;

[0039] 14- Exhaust slot;

[0040] 15- second exhaust hole;

[0041] 16-Card slot;

[0042] 1a-main body;

[0043] 1b-mask part;

[0044] 2-valve bonnet;

[0045] 21-connecting column;

[0046] 211-limiting block;

[0047] 212-elastic cantilever;

[0048] 22- elastic clamping convex;

[0049] 3-valve core;

[0050] 31- support bar;

[0051] 311-lifting surface;

[0052] 312- platform surface;

[0053] 32-connection hole;

[0054] 321-limiting slot;

[0055] 4- Sealing plug;

[0056] 5- first sealing ring;

[0057] 6- second sealing ring;

[0058] 7- The third sealing ring.

[0059] 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

[0060] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0061] In the description of this application, unless otherwise clearly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot 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 be a fixed connection, a detachable connection, an integral connection, or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0062] 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 at the angles 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 also be understood that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element.

[0063] like Figure 1 As shown, the embodiment of the present application provides a pressure cooker cover, which includes a cover body 02 and a pressure limiting valve 01. The cover body 02 is provided with a mounting hole, and at least a part of the pressure limiting valve 01 is penetrated through the mounting hole and extends into the inner side of the cover body 02, so that the gas in the pot can be discharged to the outside of the pot through the pressure limiting valve 01; the pressure limiting valve 01 can be fixed to the cover body 02 by means of nuts or buckles.

[0064] like Figure 2-Figure 4 As shown, the pressure limiting valve 01 provided in the embodiment of the present application includes a valve body 1, a valve bonnet 2 and a valve core 3. The valve body 1 is used to connect the cover body 02 to realize the installation and fixation of the pressure limiting valve 01. The valve body 1 is provided with an exhaust pipe 11, which is arranged through the installation hole of the cover body 02 and extends into the inner side of the cover body 02, thereby forming an exhaust channel connecting the inner and outer sides of the cover body 02; the valve bonnet 2 is connected to the valve body 1, thereby forming the external form of the pressure limiting valve 01; the valve core 3 is connected to the valve bonnet 2 and extends into the valve body 1, that is, the valve core 3 is located inside the pressure limiting valve 01, and the valve core 3 is used to open or close the exhaust pipe 11, thereby opening or closing the exhaust channel. Specifically, when the valve core 3 moves upward, the exhaust pipe 11 is opened, and the gas in the pot can be discharged outside the pot; when the valve core 3 moves downward, the exhaust pipe 11 is closed, and a high pressure state can be formed in the pot, meeting the requirements of high-pressure cooking.

[0065] Among them, a first sealing ring 5 can be arranged between the exhaust pipe 11 and the cover body 02 to prevent the gas in the pot from leaking along the exhaust pipe 11 and the cover body 02, affecting the sealing performance of the pressure limiting valve 01. A second sealing ring 6 can be arranged at the lower end of the valve body 1 (the end of the valve body 1 facing the cover body 02), so as to form a sealing fit between the valve body 1 and the cover body 02, so as to prevent the gas in the pressure limiting valve 01 from leaking along the gap between the valve body 1 and the cover body 02 and scalding the user. A third sealing ring 7 can be arranged between the valve body 1 and the valve cap 2, so as to form a sealing fit between the valve body 1 and the valve cap 2, so as to prevent the gas in the pressure limiting valve 01 from leaking along the gap between the valve body 1 and the valve cap 2 and scalding the user.

[0066] Furthermore, the valve bonnet 2 is rotatably connected to the valve body 1, the valve bonnet 2 and the valve body 1 are relatively fixed in the axial direction, and the inner wall of the valve body 1 is convexly provided with a first support portion; the valve core 3 is slidably connected to the valve bonnet 2, the valve core 3 faces the exhaust pipe 11 to open or close the exhaust pipe 11, and the outer wall of the valve core 3 is convexly provided with a second support portion; the second support portion is overlapped with the first support portion, thereby providing support for the valve core 3. The first supporting part and the second supporting part, one of which is a supporting block 12, and the other is a supporting strip 31 extending circumferentially and having a lifting surface 311 (the lifting surface 311 refers to a surface whose height gradually increases or gradually decreases while extending circumferentially, for example, a circumferentially extending inclined surface or arc surface, etc.). When the valve cap 2 drives the valve core 3 to rotate, the supporting block 12 slides relatively along the supporting strip 31 to drive the valve core 3 to slide up and down along the valve cap 2. That is to say, it is only necessary to rotate the external valve cap 2 and drive the supporting block 12 to slide along the supporting strip 31 through the valve cap 2 to change the height of the valve core 3, so as to realize the up and down movement of the internal valve core 3, thereby opening or closing the exhaust valve. The structure is simple and the operation is convenient. During the operation, only the internal valve core 3 moves up and down, while the external valve cap 2 and the valve body 1 do not move relative to each other in the axial direction, so that the overall external shape of the pressure limiting valve 01 remains unchanged, thereby improving the stability and sealing of the pressure limiting valve 01, effectively preventing external dirt from entering the interior of the pressure limiting valve 01, and improving the use experience.

[0067] Specifically, the side wall of the valve body 1 is provided with an annular clamping groove 16, which is recessed in the outer periphery of the valve body 1. The side wall of the valve cap 2 is provided with an elastic clamping protrusion 22, which protrudes from the inner periphery of the valve cap 2. The elastic clamping protrusion 22 is clamped into the clamping groove 16, so that the valve body 1 and the valve cap 2 are relatively fixed in the axial direction; the elastic clamping protrusion 22 can slide along the clamping groove 16, so that the valve body 1 and the valve cap 2 can rotate relative to each other. It can be understood that the valve cap 2 and the valve body 1 can also be connected to each other by means of a retaining spring or a bearing, as long as the requirements of axial fixation and circumferential rotation can be met.

[0068] like Figure 3-Figure 6 As shown, the valve body 1 includes a main body 1a. The main body 1a is configured as a cylindrical structure with an opening facing upward, and an exhaust pipe 11 is disposed in the inner cavity of the main body 1a. A portion of the exhaust pipe 11 passes through the bottom of the main body 1a and extends out of the valve body 1, so that the gas in the pot can enter the inner cavity of the main body 1a along the exhaust pipe 11. The exhaust pipe 11 and the main body 1a can be connected to each other in a non-detachable manner such as integral molding, welding or injection molding, or can be connected to each other in a detachable manner such as threaded connection. The main body 1a is provided with a first exhaust hole 13, and the first exhaust hole 13 penetrates the main body 1a in the radial direction of the main body 1a, so that the gas in the inner cavity of the main body 1a can be discharged along the first exhaust hole 13.

[0069] Furthermore, the valve body 1 includes a mask portion 1b. The mask portion 1b surrounds the outer side of the main body portion 1a, and forms an annular exhaust groove 14 with the main body portion 1a. The first exhaust hole 13 connects the exhaust groove 14 with the inner cavity of the main body portion 1a. The gas discharged from the first exhaust hole 13 enters the exhaust groove 14 and then is discharged from the exhaust groove 14 instead of being directly discharged into the atmosphere. The gas is cooled by the exhaust groove 14 to prevent the high-temperature gas from being directly ejected and scalding the user. The gas can also be buffered and noise-reduced to improve the user experience.

[0070] Furthermore, the mask portion 1b is provided with a second exhaust hole 15, which connects the exhaust groove 14 with the outside of the valve body 1. The second exhaust hole 15 and the first exhaust hole 13 are staggered with each other along the circumference of the valve body 1 to force the gas in the exhaust groove 14 to flow along the circumferential direction, prolonging the residence time of the gas in the exhaust groove 14, thereby improving the cooling and buffering effects.

[0071] like Figure 5-Figure 7 As shown, the number of support blocks 12 is not less than two (including two or more), and each support block 12 is centrally symmetrically arranged around the axis of the valve body 1, so that the valve core 3 and the valve body 1 form at least two support points, ensuring that the valve body 1 provides stable support for the valve core 3. Of course, in some embodiments, only one support block 12 may be provided, and the stability of the valve core 3 may be ensured by means of a guide structure or the like.

[0072] Further, the number of the lifting surfaces 311 is an integer multiple (for example, 1, 2 or 3 times, etc.) of the number of the support blocks 12, and each lifting surface 311 is centrally symmetrically arranged around the axis of the valve body 1, so that each support block 12 can correspond to at least one lifting surface 311, and each support block 12 can be lifted and lowered synchronously to achieve stable up and down movement of the valve core 3. Typically but not restrictively, the number of the support blocks 12 is two, the number of the lifting surfaces 311 is two, four, six or eight, etc.; the number of the support blocks 12 is three, the number of the lifting surfaces 311 is three or six, etc.

[0073] When the number of lifting surfaces 311 is 1 times the number of support blocks 12, the support blocks 12 correspond to the lifting surfaces 311 one by one. When the number of lifting surfaces 311 is 2 times or more the number of support blocks 12, each support block 12 can correspond to multiple lifting surfaces 311, that is, to multiple installation positions, which can reduce the installation position requirements of the valve core 3 and improve the convenience of assembling the pressure limiting valve 01.

[0074] Furthermore, when the number of lifting surfaces 311 is 2 times or more than the number of support blocks 12, the multiple lifting surfaces 311 corresponding to each support block 12 can be located at the same height position, so that the valve core 3 only forms one height adjustment range; the multiple lifting surfaces 311 corresponding to each support block 12 can also be located at different height positions, that is, at least two lifting surfaces 311 are arranged in sequence along the height direction, so that the valve core 3 can form at least two height adjustment ranges.

[0075] Furthermore, the lifting surfaces 311 on both sides of the highest point of the support bar 31 or the lowest point of the support bar are mirror-symmetrical, so that the lifting directions of the two lifting surfaces 311 on both sides of the highest point or the lowest point are opposite, so that the valve cap 2 can achieve the expected adjustment purpose by rotating in the forward and reverse directions, without identifying the rotation direction of the valve cap 2, thereby improving the convenience of operation.

[0076] Furthermore, each lifting surface 311 is connected end to end to form a closed annular structure. On the one hand, the support strip 31 forms a continuous support for the support block 12, so that the valve core 3 can be installed in any circumferential direction, further improving the convenience of assembling the pressure limiting valve 01; on the other hand, the valve cap 2 can be rotated in any angle in both positive and negative directions, that is, there is no need to identify the rotation direction and rotation angle of the valve cap 2, further improving the convenience of operation. It can be understood that in other embodiments, each lifting surface 311 can also be arranged at intervals from each other.

[0077] Furthermore, the support bar 31 has a platform surface 312, and the platform surface 312 is arranged at both ends of the lifting surface 311, that is, the highest point of the lifting surface 311 and the lowest point of the lifting surface 311 are respectively provided with a platform surface 312, and the platform surface 312 is a plane extending circumferentially and having a constant height, so that the valve core 3 can stably stay at the lowest position and the highest position, that is, even after the user loosens the valve cap 2, the valve core 3 can stably stay at the position of closing the exhaust pipe 11 or opening the exhaust pipe 11, ensuring that the state of the exhaust channel will not change during use. The platform surfaces 312 of two adjacent lifting surfaces 311 can be connected to each other, so that each lifting surface 311 forms a ring structure connected end to end through the platform surface 312; the platform surfaces 312 of two adjacent lifting surfaces 311 can also be disconnected from each other, so that each lifting surface 311 is arranged at intervals from each other.

[0078] like Figure 3 , Figure 4 and Figure 8 As shown, one of the valve core 3 and the valve cap 2 is provided with a connecting hole 32, and the other is provided with a connecting column 21. The connecting column 21 is inserted into the connecting hole 32, thereby playing a radial limiting role between the valve core 3 and the valve cap 2, ensuring that the valve core 3 can face the exhaust pipe 11, thereby improving the sealing performance of the valve core 3 and the exhaust pipe 11.

[0079] Furthermore, a limit groove 321 is provided on the inner wall of the connecting hole 32, and a limit block 211 is protruding from the outer wall of the connecting column 21. The limit block 211 extends into the limit groove 321, thereby playing a circumferential limiting role between the valve core 3 and the valve cap 2, ensuring that the valve core 3 can rotate together with the valve cap 2; the height of the limit groove 321 is higher than the height of the limit block 211, that is, the limit block 211 can slide axially a certain distance in the limit groove 321 to avoid axial interference between the valve core 3 and the valve cap 2, ensuring that the valve core 3 and the valve cap 2 can slide relative to each other axially.

[0080] Furthermore, the connecting column 21 includes an elastic cantilever 212, which extends along the axial direction of the connecting column 21, and a limit block 211 is protruded from the elastic cantilever 212, so that the limit block 211 and the elastic cantilever 212 together constitute an elastic buckle structure, so that the valve core 3 and the valve bonnet 2 are connected to each other by a buckle method, and the connection method is simple and has high connection reliability. Specifically, the limit block can be retracted along with the elastic cantilever 212, so as to facilitate the assembly of the valve core 3 and the valve bonnet 2; the limit block can be ejected along with the elastic cantilever 212, so that the valve core 3 and the valve bonnet 2 are stably maintained in a connected state, and the connection between the valve core 3 and the valve bonnet 2 is prevented from being loosened. It can be understood that the valve core 3 and the valve bonnet 2 can also be connected to each other by any appropriate method such as pin connection or key connection.

[0081] Furthermore, a through hole is formed in the center of the connecting column 21, and a sealing plug 4 is installed in the through hole. A part of the sealing plug 4 passes through the through hole and extends into the inner side of the elastic cantilever 212 (the side of the elastic cantilever 212 close to the axis of the connecting column 21), thereby providing an outward expansion effect on the elastic cantilever 212, ensuring that the elastic cantilever 212 can pop out outward and stably remain in the pop-up state, thereby preventing the valve core 3 and the valve cap 2 from accidentally loosening during use.

[0082] Furthermore, along the circumference of the valve core 3, the extension angle of the limit groove 321 is greater than the extension angle of the limit block 211 (refer to Figure 8 ), that is to say, the limit block 211 can rotate a certain angle in the circumferential direction in the limit groove 321, so that the valve core 3 and the valve cap 2 can rotate a certain angle independently, so that the valve core 3 can automatically descend along the lifting surface 311 with the support block 12, thereby closing the exhaust pipe 11. That is to say, when closing the exhaust pipe 11, the angle at which the user rotates the valve cap 2 is smaller than the actual rotation angle of the valve core 3. The user only needs to gently rotate the valve cap 2 to separate the limit block 211 from the supporting table, so that the exhaust pipe 11 can be reliably closed, further improving the convenience of operation and the reliability of use.

[0083] In addition, an embodiment of the present application further provides a pressure cooker, which includes a pot body and any one of the pressure cooker covers provided in the embodiments of the present application, wherein the pressure cooker cover is movably connected to the pot body and can be sealed with the pot body.

[0084] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A pressure limiting valve, It is characterized in that include: A valve body (1) is provided with an exhaust pipe (11), and a first supporting portion is convexly provided on the inner side wall of the valve body (1); A valve cap (2) is rotatably connected to the valve body (1), and the valve cap (2) and the valve body (1) are relatively fixed in the axial direction; A valve core (3) is slidably connected to the valve cap (2), the valve core (3) is used to open or close the exhaust pipe (11), and a second supporting portion is convexly provided on the outer side wall of the valve core (3); The second support portion is overlapped with the first support portion, and one of the first support portion and the second support portion is a support block (12), and the other is a support bar (31) extending in the circumferential direction and having a lifting surface (311); When the valve cap (2) drives the valve core (3) to rotate, the support block (12) slides relatively along the support strip (31) to drive the valve core (3) to slide up and down along the valve cap (2).

2. The pressure limiting valve according to claim 1, It is characterized in that The support bar (31) has a platform surface (312), and the platform surface (312) is arranged at both ends of the lifting surface (311).

3. The pressure limiting valve according to claim 1, It is characterized in that The number of the support blocks (12) is no less than two, and each of the support blocks (12) is centrally symmetrically arranged around the axis of the valve body (1); The number of the lifting surfaces (311) is an integer multiple of the number of the support blocks (12), and the lifting surfaces (311) are arranged in a centrally symmetrical manner around the axis of the valve body (1).

4. The pressure limiting valve according to claim 2, It is characterized in that The lifting surfaces (311) on both sides of the highest point of the support bar (31) or the lowest point of the support bar (31) are mirror-symmetrical.

5. The pressure limiting valve according to claim 2, It is characterized in that The lifting surfaces (311) are connected end to end to form a closed annular structure.

6. The pressure limiting valve according to any one of claims 1 to 5, It is characterized in that Among the valve core (3) and the valve cap (2), One of them is provided with a connecting hole (32), and the inner wall of the connecting hole (32) is provided with a limiting groove (321); The other is provided with a connecting column (21), and a limiting block (211) is protrudingly provided on the outer wall of the connecting column (21); The connecting column (21) is inserted into the connecting hole (32), the limiting block (211) extends into the limiting groove (321), and the height of the limiting groove (321) is higher than the height of the limiting block (211).

7. The pressure limiting valve according to claim 6, It is characterized in that Along the circumference of the valve core (3), the extension angle of the limiting groove (321) is greater than the extension angle of the limiting block (211).

8. The pressure limiting valve according to claim 6, It is characterized in that The connecting column (21) comprises an elastic cantilever (212), the elastic cantilever (212) extending along the axial direction of the connecting column (21), and the limiting block (211) protrudingly arranged on the elastic cantilever (212).

9. The pressure limiting valve according to any one of claims 1 to 5, It is characterized in that The valve body (1) comprises a main body (1a) and a mask (1b), wherein the mask (1b) surrounds the outside of the main body (1a) and forms an annular exhaust groove (14) with the main body (1a); The main body (1a) is provided with a first exhaust hole (13), and the first exhaust hole (13) communicates with the exhaust groove (14) and the inner cavity of the main body (1a); The mask portion (1b) is provided with a second exhaust hole (15), and the second exhaust hole (15) is connected with the exhaust groove (14) and the outside of the valve body (1); The second exhaust hole (15) and the first exhaust hole (13) are staggered with each other along the circumferential direction of the valve body (1).

10. A pressure cooker lid, It is characterized in that It comprises a cover body and the pressure-limiting valve according to any one of claims 1 to 9.

11. A pressure cooker, It is characterized in that The invention comprises a pot body and the pressure cooker cover according to claim 10.

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