Pressure limiting valve and container cover

Abstract

The pressure limiting valve comprises a valve seat, a valve body, an exhaust pipe and a balancing weight, the valve body is movably connected with the valve seat, the valve body is provided with a first valve cavity, the valve seat further comprises a sealing part and a matching part, the exhaust pipe comprises an air inlet and an exhaust port, the exhaust port is located in the first valve cavity, the sealing part can open or block the exhaust port, and the balancing weight is located on the outer side of the valve body. The first abutting part extends towards the valve body in the radial direction of the pressure limiting valve, the second abutting part extends away from the first abutting part in the radial direction of the pressure limiting valve, and the balancing weight can move relative to the valve body, so that the pressure limiting valve at least has a first state and a second state. In the first state, a first gap is formed between the first abutting part and the matching part in the height direction of the pressure limiting valve, and the second abutting part abuts against the valve seat in the height direction of the pressure limiting valve. And in the second state, the first abutting part abuts against the matching part in the height direction of the pressure limiting valve. A user can adjust different exhaust pressures of the pressure limiting valve by adjusting the state of the pressure limiting valve, and user requirements are met.

Description

Technical Field

[0001] The utility model relates to the technical field of cooking utensils, in particular to a pressure limiting valve and a container cover. Background Art

[0002] Cooking containers such as pressure cookers, micro-pressure cookers, and rice cookers are usually equipped with pressure limiting valves to shorten the cooking time of ingredients. However, the pressure value provided by the current pressure limiting valves is single, resulting in the pressure in the cooking container being unable to meet the cooking requirements of different foods. If the pressure in the cooking container is too low or too high, it is easy to cause the loss of nutrients in the ingredients themselves, thus failing to meet user needs. Utility Model Content

[0003] The present application provides a pressure limiting valve and a container cover, which are used to solve the problem that the current pressure limiting valve provides a single pressure value, resulting in the pressure in the cooking container being unable to meet the requirements for cooking different foods and unable to meet the needs of users.

[0004] In a first aspect, the present application provides a pressure-limiting valve, which includes a valve seat, a valve body, an exhaust pipe and a counterweight. The valve body is movably connected to the valve seat, the valve body has a first valve cavity, and the valve seat also includes a sealing portion and a matching portion, wherein the sealing portion is located in the first valve cavity. The exhaust pipe is fixedly connected to the valve seat, the exhaust pipe is provided with a connected air inlet and exhaust port, one end of the exhaust port is located in the first valve cavity, and the sealing portion can open or block the exhaust port during the movement of the valve body relative to the valve seat in the height direction of the pressure-limiting valve. The counterweight is located on the outside of the valve body, and the counterweight has a first abutment portion and a second abutment portion, the first abutment portion extends toward the valve body in the radial direction of the pressure-limiting valve, and the second abutment portion extends away from the first abutment portion in the radial direction of the pressure-limiting valve.

[0005] The counterweight block can move relative to the valve body, so that the pressure-limiting valve has at least a first state and a second state.

[0006] In the first state, the first abutting portion and the matching portion have a first gap along the height direction of the pressure limiting valve, and the second abutting portion abuts against the valve seat along the height direction of the pressure limiting valve. In the second state, the first abutting portion and the matching portion abut against the height direction of the pressure limiting valve.

[0007] In this solution, when the pressure-limiting valve is used for cooking, the user can drive the counterweight to move before using the pressure-limiting valve for cooking, so that the pressure-limiting valve is in the first state or the second state. In the first state, the second abutting portion of the counterweight abuts against the valve seat, and then the valve seat can be used to support the counterweight, so that the first abutting portion of the counterweight and the matching portion of the valve body have a first gap along the height direction of the pressure-limiting valve. At this time, when the pressure value reaches the first pressure, the sealing portion of the pressure-limiting valve can open the exhaust port so that the pressure-limiting valve can exhaust. In the second state, the first abutting portion of the counterweight abuts against the matching portion of the valve body, and then the valve body is used to support the counterweight. At this time, when the pressure value reaches the second pressure, the sealing portion of the pressure-limiting valve can open the exhaust port so that the pressure-limiting valve can exhaust.

[0008] When the pressure limiting valve switches from the initial state (the sealing part blocks the exhaust port) to the exhaust state (the sealing part opens the exhaust port) in the first state, the first pressure needs to at least overcome the gravity of the valve body and other components installed on the valve body (including at least the sealing part); when the pressure limiting valve switches from the initial state (the sealing part blocks the exhaust port) to the exhaust state (the sealing part opens the exhaust port) in the second state, the second pressure needs to at least overcome the gravity of the valve body, other components installed on the valve body (including at least the sealing part) and the counterweight. Therefore, the exhaust pressure of the pressure limiting valve in the first state is lower than the exhaust pressure in the second state, and the pressure limiting valve has at least two pressure limiting values, so that the user can adjust the pressure value of the cooking container according to actual use needs, reduce the risk of nutrient loss of the food itself due to too low or too high pressure in the cooking container, and thus help improve the user experience.

[0009] In this solution, the counterweight block is sleeved on the outer side of the valve body, and the counterweight block can rotate relative to the valve body.

[0010] In this solution, the first abutting portion of the counterweight and the matching portion of the valve body can be abutted or released by rotating, so that the gravity of the counterweight falls on the valve body or the valve seat, which is conducive to improving the reliability of the pressure limiting valve in the first state or the second state. At the same time, switching the state of the pressure limiting valve by rotating is conducive to improving the convenience of the user in driving the counterweight.

[0011] In this embodiment, the valve seat is provided with a protrusion protruding along the height direction of the pressure limiting valve, and the second abutting portion is further provided with an avoidance notch. In the first state, the second abutting portion abuts against the protrusion, and in the second state, the avoidance notch is used to avoid the protrusion.

[0012] In this scheme, along the height direction of the pressure limiting valve, the protrusion is closer to the sealing part than the matching part. When the protrusion abuts the second abutting part of the counterweight, the first abutting part and the matching part have a first gap along the height direction of the pressure limiting valve, so that the weight of the counterweight falls on the valve seat, and the pressure limiting valve is in the first state, so that the exhaust pressure of the pressure limiting valve in the first state does not need to overcome the weight of the counterweight, so that the pressure limiting valve has a smaller exhaust pressure, that is, the first pressure. Therefore, the valve seat is provided with a protrusion so that the valve seat can be used to support the counterweight, and ensure that there is a first gap between the first abutting part of the counterweight and the matching part of the valve body, reducing the risk of the weight of the counterweight falling on the valve body, which is conducive to improving the reliability and stability of the pressure limiting valve in the first state. At the same time, when the pressure limiting valve is in the second state, the protrusion can fall into the avoidance gap, that is, compared with the first state, the height of the counterweight in the second state is reduced, so that when the pressure limiting valve is in the second state, the first abutting part of the counterweight abuts against the matching part of the valve body. Therefore, the avoidance gap can provide space for the counterweight to move downward and abut against the matching portion of the valve body.

[0013] In this aspect, in the second state, a second gap exists between the valve seat and the second abutting portion along a height direction of the pressure limiting valve.

[0014] In this solution, the valve seat further includes a platform portion, and the raised portion extends in the height direction relative to the platform portion toward the sealing portion. A second gap is provided between the second abutting portion and the platform portion in the height direction of the pressure limiting valve, that is, the second abutting portion of the counterweight block does not abut against the valve seat, thereby reducing the risk of the weight of the counterweight block falling on the valve seat, which is beneficial to improving the reliability and stability of the pressure limiting valve in maintaining the second state.

[0015] In this solution, the counterweight block further includes a main body portion extending along the height direction of the pressure-limiting valve, and the first abutting portion and the second abutting portion are both connected to the main body portion.

[0016] In this solution, the body can increase the weight of the counterweight, so that the pressure limiting valve has a larger exhaust pressure when in the second state, which is beneficial to reducing the cooking time of the food and improving the cooking efficiency. At the same time, in this embodiment, the valve seat has a second valve cavity, the body is located in the second valve cavity, and the side walls of the body can abut against the side walls of the valve body and the valve seat to limit the shaking of the exhaust pipe, reduce the risk of shaking of the pressure limiting valve in the exhaust state, and help improve the stability and reliability of the pressure limiting valve.

[0017] In this solution, the first abutting portion, the second abutting portion and the main body are integrally formed, and the cross section of the counterweight block is T-shaped.

[0018] In this solution, the first abutting portion, the second abutting portion and the main body are integrally formed to reduce the production process of the counterweight block, which is conducive to reducing the production cost of the pressure-limiting valve. At the same time, the first abutting portion, the second abutting portion and the main body are integrally formed, which is conducive to improving the connection rigidity between the first abutting portion and the second abutting portion and the main body. When the counterweight block abuts against the valve body or the valve seat, the risk of the first abutting portion and the second abutting portion breaking relative to the main body is reduced, which is conducive to improving the stability and reliability of the pressure-limiting valve. On the other hand, the cross-section of the counterweight block is T-shaped, that is, along the height direction of the pressure-limiting valve, the first abutting portion and the second abutting portion are at the same height, which is further conducive to reducing the size of the pressure-limiting valve along the height direction.

[0019] In this solution, the valve seat has a second valve cavity, the matching portion is located in the second valve cavity, and the second abutting portion is located outside the second valve cavity and can block the second valve cavity.

[0020] In this solution, the risk of steam being discharged through the second valve chamber is reduced, so that the steam can be gathered in the second valve chamber and communicate with the outside through the exhaust hole, which is beneficial to improving the reliability of the pressure limiting valve in the exhaust state.

[0021] In this solution, the valve seat is also provided with an exhaust hole connected to the second valve cavity.

[0022] In this solution, the exhaust hole is used to communicate with the outside world. The exhaust hole is set on the valve seat so that steam can flow into the first valve cavity through the exhaust pipe, and then flow to the second valve cavity connected to the first valve cavity, and then communicate with the outside world through the exhaust hole so that the steam can be discharged.

[0023] In this solution, the pressure-limiting valve further includes a valve handle, which is sleeved on the outer side of the valve body. Along the height direction of the pressure-limiting valve, the first abutting portion is located between the valve handle and the matching portion.

[0024] In this solution, the valve handle set on the pressure limiting valve can make the counterweight block be located between the valve handle and the valve seat, which reduces the risk of the counterweight block detaching from the pressure limiting valve during operation and reduces the risk of the counterweight block being lost during transportation of the pressure limiting valve.

[0025] The second aspect of the present application provides a container cover, the container cover comprises a cover body and a pressure limiting valve, the pressure limiting valve is the pressure limiting valve described above, wherein the pressure limiting valve is installed on the cover body through the valve seat.

[0026] In this solution, one end of the exhaust pipe of the pressure limiting valve has an exhaust port extending relative to the cover body, and when the container cover is closed over the container body, the exhaust port can extend into the container body. During the cooking process, the user can adjust the pressure limiting valve to the first state or the second state according to actual needs, so that the pressure limiting valve has different exhaust pressures, and thus the cooking container has different pressures, so as to meet the different cooking requirements of the user and improve the use experience of the container cover for the container body.

[0027] 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

[0028] Figure 1 This is a schematic structural diagram of a container cover provided in the present application in a specific embodiment, wherein the pressure limiting valve is in a first state;

[0029] Figure 2 This is a schematic structural diagram of a container cover provided in the present application in a specific embodiment, wherein the pressure limiting valve is in a second state;

[0030] Figure 3 for Figure 1 A cross-sectional view of a container cover provided in a specific embodiment;

[0031] Figure 4 for Figure 2 A cross-sectional view of a container cover provided in a specific embodiment;

[0032] Figure 5 for Figure 3 A partial enlarged view of part A;

[0033] Figure 6 for Figure 4 A partial enlarged view of part B.

[0034] Description of reference numerals:

[0035] 1-pressure limiting valve;

[0036] 11-valve seat;

[0037] 111- raised portion;

[0038] 112 - second valve chamber;

[0039] 113- Exhaust hole;

[0040] 114-Platform Department;

[0041] 12-valve body;

[0042] 121- sealing part;

[0043] 122-first valve chamber;

[0044] 123-cooperation part;

[0045] 124-first valve body;

[0046] 125- second valve body;

[0047] 13- Exhaust pipe;

[0048] 131-air inlet;

[0049] 132-exhaust port;

[0050] 133-limiting section;

[0051] 14- counterweight;

[0052] 141- first abutting portion;

[0053] 142- second abutting portion;

[0054] 143-Avoidance gap;

[0055] 144-Ontology part;

[0056] 15-valve handle;

[0057] 16-limiting piece;

[0058] 2- Cover body.

[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 better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0061] In a specific embodiment, the present application is further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0062] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0063] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0064] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0065] It should be noted that the directional words such as "upper", "lower", "left", and "right" 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 is also necessary to understand 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.

[0066] The embodiment of the present application provides a pressure limiting valve 1, which is used for a container cover of a cooking container, and the cooking container may be a pressure cooker, a micro-pressure cooker, an electric rice cooker, etc. The cooking container comprises a container cover and a container body, and the container cover can cover the container body.

[0067] like Figure 1 and Figure 3 As shown, the container cover includes a cover body 2, and a pressure limiting valve 1 is installed on the cover body 2. When the container cover is closed on the container body, the air inlet 131 of the exhaust pipe 13 of the pressure limiting valve 1 is communicated with the inner cavity of the container body, and the exhaust port 132 of the pressure limiting valve 1 is used to open when the pressure in the container body reaches a preset pressure during the cooking process, so as to exhaust the cooking container.

[0068] like Figure 1-Figure 4 As shown, the pressure-limiting valve 1 includes a valve seat 11, a valve body 12, an exhaust pipe 13 and a counterweight 14. The valve body 12 is movably connected to the valve seat 11. The valve body 12 includes a sealing portion 121 and a first valve cavity 122. The sealing portion 121 is located in the first valve cavity 122. The exhaust pipe 13 is fixedly connected to the valve seat 11. The exhaust pipe 13 is provided with a communicating air inlet 131 and an exhaust port 132. One end of the exhaust port 132 is located in the first valve cavity 122. When the valve body 12 moves relative to the valve seat 11 along the height direction of the pressure-limiting valve 1, the sealing portion 121 can open or block the exhaust port 132. The counterweight 14 is located on the outside of the valve body 12, and the counterweight 14 can move relative to the valve body 12, so that the pressure-limiting valve 1 has at least a first state and a second state. As shown Figure 5As shown, the counterweight 14 has a first abutting portion 141 and a second abutting portion 142, the first abutting portion 141 extends toward the valve body 12 along the radial direction of the pressure limiting valve 1, and the second abutting portion 142 extends away from the first abutting portion 141 along the radial direction of the pressure limiting valve 1, and the valve body 12 has a matching portion 123. In the first state, the first abutting portion 141 and the matching portion 123 have a first gap along the height direction of the pressure limiting valve 1, and the second abutting portion 142 abuts against the valve seat 11 along the height direction of the pressure limiting valve 1, as shown in FIG. Figure 6 As shown, in the second state, the first abutting portion 141 abuts against the matching portion 123 along the height direction of the pressure limiting valve 1 .

[0069] When the pressure limiting valve 1 is used for cooking, the user can drive the weight block 14 to move before using the pressure limiting valve 1 for cooking, so that the pressure limiting valve 1 is in the first state or the second state. Figure 5 As shown, the second abutting portion 142 of the counterweight 14 abuts against the valve seat 11, and the valve seat 11 can be used to support the counterweight 14, so that the first abutting portion 141 of the counterweight 14 and the matching portion 123 of the valve body 12 have a first gap along the height direction of the pressure limiting valve 1. Figure 1 and Figure 3 As shown, when the pressure value in the container reaches the first pressure, the sealing portion 121 of the pressure limiting valve 1 can open the exhaust port 132 to allow the pressure limiting valve 1 to exhaust. Figure 6 As shown, the first abutting portion 141 of the counterweight 14 abuts against the matching portion 123 of the valve body 12, and the valve body 12 is used to support the counterweight 14. Figure 2 and Figure 4 As shown, when the pressure value in the container reaches the second pressure, the sealing portion 121 of the pressure limiting valve 1 can open the exhaust port 132 so that the pressure limiting valve 1 can exhaust gas.

[0070] Specifically, the exhaust pipe 13 includes an exhaust passage for connecting the air inlet 131 and the exhaust port 132. When cooking, when the pressure limiting valve 1 is in a state such as Figure 3In the first state shown, and when the sealing portion 121 blocks the exhaust port 132 (the pressure-limiting valve 1 is in the initial state of the first state), the steam in the container body enters the exhaust channel through the air inlet 131 and flows to the exhaust port 132. At this time, the steam has not accumulated at the exhaust port 132, and the steam pressure acting on the sealing portion 121 is small, which is insufficient to drive the sealing portion 121 to move away from the exhaust pipe 13 along the height direction of the pressure-limiting valve 1, and the steam accumulates at the exhaust port 132 due to the sealing portion 121 blocking the exhaust port 132. As the pressure in the container body gradually increases to the first pressure value during the cooking process, the first pressure can overcome the gravity of the valve body 12 and other components connected to the valve body 12, so that the valve body 12 moves upward, so that the sealing portion 121 can open the exhaust port 132, and then the container body can be connected to the outside through the exhaust pipe 13 to achieve exhaust. At this time, the pressure-limiting valve 1 is in the exhaust state of the first state.

[0071] When cooking, when the pressure limiting valve 1 is in the Figure 4 In the second state shown, and when the sealing portion 121 blocks the exhaust port 132 (the pressure limiting valve 1 is in the initial state of the second state), the steam in the container body enters the exhaust channel through the air inlet 131 and flows to the exhaust port 132. At this time, the steam has not accumulated at the exhaust port 132, and the steam pressure acting on the sealing portion 121 is small, which is insufficient to drive the sealing portion 121 to move away from the exhaust pipe 13 along the height direction of the pressure limiting valve 1, and the steam accumulates at the exhaust port 132 due to the sealing portion 121 blocking the exhaust port 132. As the pressure in the container body gradually increases to the second pressure value during the cooking process, the second pressure can overcome the gravity of the valve body 12 and other components connected to the valve body 12, so that the valve body 12 moves upward, so that the sealing portion 121 can open the exhaust port 132, and then the container body can be connected to the outside through the exhaust pipe 13 to achieve exhaust. At this time, the pressure limiting valve 1 is in the exhaust state of the second state.

[0072] In summary, when the pressure limiting valve 1 switches from the initial state to the exhaust state in the first state, the first pressure needs to at least overcome the gravity of the valve body 12 and other components installed on the valve body 12 (including at least the sealing part 121); when the pressure limiting valve 1 switches from the initial state to the exhaust state in the second state, the second pressure needs to at least overcome the gravity of the valve body 12, other components installed on the valve body 12 (including at least the sealing part 121) and the counterweight 14. Therefore, the exhaust pressure of the pressure limiting valve 1 in the first state is lower than the exhaust pressure in the second state, and the pressure limiting valve 1 has at least two pressure limiting values, so that the user can adjust the pressure value of the cooking container according to actual use needs, reduce the risk of nutrient loss of the food itself due to too low or too high pressure in the cooking container, and thus help improve the user experience.

[0073] In addition, the counterweight 14 is located outside the valve body 12, so that the user can directly drive the counterweight 14 to move to adjust the pressure-limiting valve 1 to the first state or the second state, which is conducive to improving the convenience of user use. At the same time, compared with the pressure-limiting valve 1 provided with a driving component to drive the counterweight 14 to move, the user directly drives the counterweight 14 to move, which can simplify the structure of the pressure-limiting valve 1, thereby reducing the production cost of the pressure-limiting valve 1. On the other hand, the radial extension of the first abutment portion 141 and the second abutment portion 142 along the pressure-limiting valve 1 is conducive to reducing the size of the pressure-limiting valve 1 along the height direction, thereby reducing the volume of the pressure-limiting valve 1, and facilitating the actual use of the user.

[0074] In a possible implementation, the pressure limiting valve 1 may include a plurality of counterweights 14 , and by driving different counterweights 14 to move, different counterweights 14 are connected to the valve body 12 , so that the pressure limiting valve 1 has a plurality of different exhaust pressures.

[0075] The present application also provides a container cover, which is used to cover the container body. Figure 3 and Figure 4 As shown, the container cover includes a cover body 2 and a pressure limiting valve 1, and the pressure limiting valve 1 is the pressure limiting valve 1 in any of the above embodiments. The pressure limiting valve 1 is mounted on the cover body 2 through a valve seat 11, and the valve seat 11 can be fixedly mounted on the cover body 2, including but not limited to welding or bonding, and the valve seat 11 can also be detachably mounted on the cover body 2, such as screw connection.

[0076] The exhaust pipe 13 of the pressure limiting valve 1 has one end of the exhaust port 132 extending relative to the cover body 2, and when the container cover is closed over the container body, the exhaust port 132 can extend into the container body. During the cooking process, the user can adjust the pressure limiting valve 1 to the first state or the second state according to actual needs, so that the pressure limiting valve 1 has different exhaust pressures, so that the cooking container has different pressures, so as to meet the different cooking requirements of the user and improve the use experience of the container cover for the container body.

[0077] In a possible implementation, Figure 1 and Figure 2 As shown, the counterweight 14 is sleeved on the outside of the valve body 12, and the counterweight 14 can rotate relative to the valve body 12. Therefore, the first abutting portion 141 of the counterweight 14 and the matching portion 123 of the valve body 12 can be abutted or released by rotation, so that the gravity of the counterweight 14 can fall on the valve body 12 or the valve seat 11, which is conducive to improving the reliability of the pressure-limiting valve 1 in the first state or the second state. At the same time, switching the state of the pressure-limiting valve 1 by rotation is conducive to improving the convenience of the user driving the counterweight 14.

[0078] In other embodiments, the counterweight 14 can move relative to the valve body 12 along the height direction of the pressure-limiting valve 1 so that the first abutment portion 141 of the counterweight 14 and the matching portion 123 of the valve body 12 can abut or release the abutment, and thus the pressure-limiting valve 1 can switch between the first state and the second state.

[0079] In a possible implementation, Figure 1 , Figure 3 and Figure 5 As shown, the valve seat 11 is provided with a protrusion 111 protruding along the height direction of the pressure limiting valve 1, as shown in FIG. Figure 1 and Figure 5 As shown, in the first state, the second abutting portion 142 abuts against the protruding portion 111, so that the first abutting portion 141 and the matching portion 123 have a first gap along the height direction of the pressure limiting valve 1. Figure 2 and Figure 6 As shown, in the second state, the avoidance notch 143 is used to avoid the protrusion 111. In this embodiment, along the height direction of the pressure-limiting valve 1, the protrusion 111 is closer to the sealing portion 121 than the matching portion 123. When the protrusion 111 abuts against the second abutting portion 142 of the counterweight 14, the first abutting portion 141 and the matching portion 123 have a first gap along the height direction of the pressure-limiting valve 1, so that the weight of the counterweight 14 falls on the valve seat 11, and the pressure-limiting valve 1 is in the first state, so that the exhaust pressure of the pressure-limiting valve 1 in the first state does not need to overcome the weight of the counterweight 14, so that the pressure-limiting valve 1 has a smaller exhaust pressure, that is, the first pressure. Therefore, the valve seat 11 is provided with a protrusion 111 so that the valve seat 11 can be used to support the counterweight 14 and ensure that there is a first gap between the first abutting portion 141 of the counterweight 14 and the matching portion 123 of the valve body 12, thereby reducing the risk of the weight of the counterweight 14 falling on the valve body 12, which is beneficial to improving the reliability and stability of the pressure-limiting valve 1 in maintaining the first state.

[0080] At the same time, when the pressure-limiting valve 1 is in the second state, the protrusion 111 can fall into the avoidance notch 143, that is, compared with the first state, the height of the counterweight 14 in the second state is reduced, so that when the pressure-limiting valve 1 is in the second state, the first abutting portion 141 of the counterweight 14 abuts against the matching portion 123 of the valve body 12. Therefore, the avoidance notch 143 can provide a space for the counterweight 14 to move downward and abut against the matching portion 123 of the valve body 12.

[0081] Specifically, when the pressure limiting valve 1 needs to be switched from the second state to the first state, the user needs to pull out the counterweight 14 upward and drive the counterweight 14 to rotate relative to the valve seat 11, so that the second abutting portion 142 can abut against the protruding portion 111. At this time, the first abutting portion 141 and the matching portion 123 have a first gap along the height direction of the pressure limiting valve 1, so that the weight of the counterweight 14 can fall on the valve seat 11, and at this time, the pressure limiting valve 1 is switched to the first state. When the pressure limiting valve 1 needs to be switched from the first state to the second state, the counterweight 14 is driven to rotate relative to the valve seat 11 and the counterweight 14 is pressed downward, so that the avoidance notch 143 can avoid the protruding portion 111, and then the first abutting portion 141 can abut against the matching portion 123. At this time, the second abutting portion 142 and the valve seat 11 have a second gap along the height direction of the pressure limiting valve 1, so that the weight of the counterweight 14 can fall on the valve body 12, and at this time, the pressure limiting valve 1 is switched to the second state.

[0082] In a specific embodiment, the first gap is configured such that when the pressure-limiting valve 1 is in the first state and the valve body 12 is lifted by steam, the matching portion 123 of the valve body 12 still does not abut against the first abutting portion 141 of the counterweight 14 .

[0083] like Figure 2 As shown, in the second state, the valve seat 11 and the second abutting portion 142 have a second gap along the height direction of the pressure limiting valve 1 .

[0084] In this embodiment, if Figure 2 As shown, the valve seat 11 further includes a platform portion 114, and the protrusion 111 extends in the height direction toward the sealing portion 121 relative to the platform portion 114. Along the height direction of the pressure limiting valve 1, the matching portion 123 is closer to the sealing portion 121 relative to the platform portion 114, and when the pressure limiting valve 1 is in the second state, the first abutting portion 141 of the counterweight 14 abuts against the matching portion 123 of the valve body 12 so that the weight of the counterweight 14 can fall on the valve body 12, and at the same time, the second abutting portion 142 and the platform portion 114 have a second gap along the height direction of the pressure limiting valve 1, that is, the second abutting portion 142 of the counterweight 14 does not abut against the valve seat 11, reducing the risk of the weight of the counterweight 14 falling on the valve seat 11, which is conducive to improving the reliability and stability of the pressure limiting valve 1 in the second state.

[0085] In another possible implementation, when the pressure-limiting valve 1 is in the second state, the second abutting portion 142 and the platform portion 114 of the valve seat 11 may also overlap, that is, there may be no second gap between them.

[0086] In a possible implementation, Figure 5 and Figure 6 As shown, the counterweight 14 further includes a main body portion 144 extending along the height direction of the pressure-limiting valve 1 , and the first abutting portion 141 and the second abutting portion 142 are both connected to the main body portion 144 .

[0087] In this embodiment, the body 144 can increase the weight of the counterweight 14, so that the pressure limiting valve 1 has a larger exhaust pressure when it is in the second state, which is beneficial to reducing the cooking time of the food and improving the cooking efficiency. At the same time, in this embodiment, the valve seat 11 has a second valve cavity 112, and the body 144 is located in the second valve cavity 112. The side walls of the body 144 can abut against the side walls of the valve body 12 and the valve seat 11 to limit the shaking of the exhaust pipe 13, reduce the risk of shaking of the pressure limiting valve 1 in the exhaust state, and help improve the stability and reliability of the pressure limiting valve 1.

[0088] In a possible implementation, Figure 3 As shown, the first abutting portion 141 , the second abutting portion 142 and the main body portion 144 are integrally formed, and the cross section of the counterweight 14 is T-shaped.

[0089] In this embodiment, the first abutting portion 141, the second abutting portion 142 and the main body 144 are integrally formed to reduce the production process of the counterweight 14, which is conducive to reducing the production cost of the pressure limiting valve 1. At the same time, the first abutting portion 141, the second abutting portion 142 and the main body 144 are integrally formed, which is conducive to improving the connection rigidity between the first abutting portion 141 and the second abutting portion 142 and the main body 144. When the counterweight 14 abuts against the valve body 12 or the valve seat 11, the risk of the first abutting portion 141 and the second abutting portion 142 breaking relative to the main body 144 is reduced, which is conducive to improving the stability and reliability of the pressure limiting valve 1. On the other hand, the cross section of the counterweight 14 is T-shaped, that is, along the height direction of the pressure limiting valve 1, the first abutting portion 141 and the second abutting portion 142 are at the same height, which is further conducive to reducing the size of the pressure limiting valve 1 along the height direction.

[0090] In any of the above embodiments, Figure 1 and Figure 3 As shown, the valve seat 11 is further provided with an exhaust hole 113 communicating with the second valve chamber 112 .

[0091] Therefore, the exhaust hole 113 is used to communicate with the outside world. The exhaust hole 113 is set on the valve seat 11, so that the steam flows into the first valve chamber 122 through the exhaust pipe 13, and then flows to the second valve chamber 112 connected with the first valve chamber 122, and then can communicate with the outside world through the exhaust hole 113, so that the steam can be discharged.

[0092] In a possible implementation, Figure 5As shown, the matching portion 123 is located in the second valve cavity 112, the second abutting portion 142 is located on the outside of the second valve cavity 112, and the first abutting portion 141 and the second abutting portion 142 can block the second valve cavity 112, reducing the risk of steam being discharged through the second valve cavity 112, so that the steam can gather in the second valve cavity 112 and communicate with the outside through the exhaust hole 113, which is beneficial to improving the reliability of the pressure limiting valve 1 in the exhaust state.

[0093] In a possible implementation, Figure 3 and Figure 5 As shown, the pressure limiting valve 1 further includes a valve handle 15, which is sleeved on the outer side of the valve body 12 and connected to the valve body 12, and the connection methods include but are not limited to clamping, threaded connection, bonding, welding, etc. Along the height direction of the pressure limiting valve 1, the first abutting portion 141 is located between the valve handle 15 and the matching portion 123. Therefore, the valve handle 15 provided in the pressure limiting valve 1 can make the counterweight 14 located between the valve handle 15 and the valve seat 11, and the risk of the counterweight 14 detaching from the pressure limiting valve 1 is reduced during the operation of the pressure limiting valve 1, and the risk of the counterweight 14 being lost is reduced during the transportation of the pressure limiting valve 1.

[0094] In a possible implementation, Figure 3 As shown, the sealing portion 121 described in the above embodiments can be a valve core fixedly connected to the valve handle 15. Along the height direction of the pressure limiting valve 1, one end of the valve core facing the valve seat 11 is threadedly connected to the valve body 12, that is, the valve handle 15 is threadedly connected to the valve body 12 through the valve core. Among them, the outer wall of the valve core can be provided with an external thread, and the inner wall of the valve body 12 connected to the valve core can be provided with an internal thread, so that the valve handle 15 and the valve body 12 can be detachably connected.

[0095] In a possible implementation, Figure 3 As shown, the valve body 12 includes a first valve body 124 and a second valve body 125 which are detachably connected, the second valve body 125 is sleeved on the outside of the first valve body 124, the first valve cavity 122 is provided in the first valve body 124, the matching portion 123 is provided in the second valve body 125, and extends radially outward relative to the outer wall of the second valve body 125. Therefore, the first valve body 124 and the second valve body 125 are detachably connected, so that the user can replace the first valve body 124 and the second valve body 125 according to needs, which is conducive to improving the service life of the pressure limiting valve 1.

[0096] The material of the first valve body 124 may be plastic, so as to process the internal thread. The material of the second valve body 125 may be metal, so that the valve body 12 has a preset weight.

[0097] In a possible implementation, Figure 4As shown, the pressure limiting valve 1 may further include a stopper 16 located in the first valve cavity 122, and the inner wall of the first valve body 124 may further be provided with a stopper groove, the exhaust pipe 13 may further include a stopper section 133, the outer wall of the stopper section 133 may be vertically arranged relative to the height direction of the pressure limiting valve 1, one end of the stopper 16 may be installed in the stopper groove, and the other end may abut against the outer wall of the stopper section 133, which may help reduce the risk of the exhaust pipe 13 shaking relative to the valve seat 11 during the exhaust process of the pressure limiting valve 1, and further improve the reliability of the operation of the pressure limiting valve 1. The stopper 16 may further include a through hole, so that steam may flow into the second valve cavity 112 through the through hole.

[0098] The above is only a specific implementation of the embodiment of the present application, but the protection scope of the embodiment of the present application is not limited thereto, and any changes or replacements within the technical scope disclosed in the embodiment of the present application should be included in the protection scope of the embodiment of the present application. Therefore, the protection scope of the embodiment of the present application should be based on the protection scope of the claims.

Claims

1. A pressure limiting valve, characterized in that: The pressure limiting valve (1) comprises: Valve seat (11); A valve body (12) is movably connected to the valve seat (11), the valve body (12) having a first valve cavity (122), the valve seat (11) further comprising a sealing portion (121) and a matching portion (123), the sealing portion (121) being located in the first valve cavity (122); an exhaust pipe (13) fixedly connected to the valve seat (11), the exhaust pipe (13) being provided with an air inlet (131) and an exhaust port (132) which are in communication with each other, one end of the exhaust port (132) being located in the first valve cavity (122), and the sealing portion (121) being capable of opening or blocking the exhaust port (132) when the valve body (12) moves relative to the valve seat (11) along the height direction of the pressure-limiting valve (1); a counterweight (14) located outside the valve body (12), the counterweight (14) comprising a first abutting portion (141) and a second abutting portion (142), the first abutting portion (141) extending along the radial direction of the pressure-limiting valve (1) toward the valve body (12), and the second abutting portion (142) extending along the radial direction of the pressure-limiting valve (1) away from the first abutting portion (141); The counterweight (14) is movable relative to the valve body (12) so that the pressure-limiting valve (1) has at least a first state and a second state; In the first state, the first abutting portion (141) and the matching portion (123) have a first gap along the height direction of the pressure limiting valve (1), and the second abutting portion (142) abuts against the valve seat (11) along the height direction of the pressure limiting valve (1). In the second state, the first abutting portion (141) and the matching portion (123) abut against each other along the height direction of the pressure limiting valve (1).

2. The pressure limiting valve according to claim 1, characterized in that: The counterweight block (14) is sleeved on the outer side of the valve body (12), and the counterweight block (14) is rotatable relative to the valve body (12).

3. The pressure limiting valve according to claim 2, characterized in that: The valve seat (11) is provided with a protruding portion (111) protruding along the height direction of the pressure limiting valve (1), and the second abutting portion (142) is also provided with an avoidance notch (143); In the first state, the second abutting portion (142) abuts against the protruding portion (111), and in the second state, the avoidance notch (143) is used to avoid the protruding portion (111).

4. The pressure limiting valve according to claim 1, characterized in that: In the second state, a second gap is formed between the valve seat (11) and the second abutting portion (142) along the height direction of the pressure limiting valve (1).

5. The pressure limiting valve according to claim 1, characterized in that: The counterweight block (14) further comprises a main body portion (144) extending along the height direction of the pressure limiting valve (1), and the first abutting portion (141) and the second abutting portion (142) are both connected to the main body portion (144).

6. The pressure limiting valve according to claim 5, characterized in that: The first abutting portion (141), the second abutting portion (142) and the main body portion (144) are integrally formed, and the cross section of the counterweight block (14) is T-shaped.

7. The pressure limiting valve according to claim 1, characterized in that: The valve seat (11) has a second valve cavity (112), the matching portion (123) is located in the second valve cavity (112), and the second abutting portion (142) is located outside the second valve cavity (112) and can block the second valve cavity (112).

8. The pressure limiting valve according to claim 7, characterized in that: The valve seat (11) is also provided with an exhaust hole (113) communicating with the second valve cavity (112).

9. The pressure limiting valve according to any one of claims 1 to 8, characterized in that: The pressure-limiting valve (1) further comprises a valve handle (15), wherein the valve handle (15) is sleeved on the outer side of the valve body (12), and along the height direction of the pressure-limiting valve (1), the first abutting portion (141) is located between the valve handle (15) and the matching portion (123).

10. A container cover, characterized in that: The container cover comprises: Cover body (2); A pressure-limiting valve (1), wherein the pressure-limiting valve (1) is the pressure-limiting valve (1) according to any one of claims 1 to 9; Wherein, the pressure limiting valve (1) is mounted on the cover body (2) via the valve seat (11).

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