Pressure limiting valve and container cover

Abstract

The present application relates to a pressure limiting valve and a container cover. The pressure limiting valve includes a valve body, a valve cover and a valve stem. The valve body has a valve cavity and an exhaust port and an opening connected to the valve cavity. The valve body has a support portion. The valve cover is detachably connected to the valve body and is used to cover the opening. The valve stem includes a valve core. The valve core can move in the valve cavity along the height direction of the pressure limiting valve to block or open the exhaust port. The pressure limiting valve includes at least one counterweight block. The counterweight block can move relative to the valve body along the height direction of the pressure limiting valve so that the pressure limiting valve is in a first state or a second state. The counterweight block closest to the valve core in the height direction of the pressure limiting valve is the first counterweight block. In the first state, the first counterweight block is supported on the support portion so that the first counterweight block and the valve core have a first gap in the height direction of the pressure limiting valve. In the second state, the first counterweight block is supported on the valve core. The exhaust pressure of the pressure limiting valve in the first state and the second state is different. The user can adjust the pressure value of the cooking container according to actual needs to improve the use experience.

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] Some cooking appliances on the market are usually equipped with pressure limiting valves, which can improve the efficiency of cooking ingredients. However, the exhaust pressure value of the current pressure limiting valves is relatively single, resulting in the pressure inside the cooking appliances being unable to meet the cooking requirements of different foods, reducing the user experience. 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 exhaust pressure value of the pressure limiting valve is single, resulting in the pressure inside the cooking utensil being unable to meet the requirements of cooking different foods, thereby reducing the user experience.

[0004] A first aspect of the present application provides a pressure-limiting valve, comprising: a valve body having a valve cavity and an exhaust port and an opening communicated with the valve cavity, and the valve body having a support portion.

[0005] A valve cover is detachably connected to the valve body and is used to cover the opening.

[0006] A valve stem, wherein the valve stem comprises a valve core, and the valve core can move in the valve cavity along the height direction of the pressure-limiting valve to block or open the exhaust port.

[0007] Wherein, the pressure-limiting valve further comprises at least one counterweight block, and the counterweight block can move relative to the valve body along the height direction of the pressure-limiting valve to place the pressure-limiting valve in the first state or the second state.

[0008] The counterweight block that is closest to the valve core along the height direction of the pressure-limiting valve is the first counterweight block. In the first state, the first counterweight block is supported on the supporting portion so that there is a first gap between the first counterweight block and the valve core along the height direction of the pressure-limiting valve. In the second state, the first counterweight block is supported on the valve core.

[0009] In this solution, when the pressure-limiting valve is used for cooking, the user first drives the counterweight to move before using the pressure-limiting valve for cooking, so that the pressure-limiting valve can be switched to the first state or the second state as needed. In the first state, the first counterweight can be supported on the support portion of the valve body, so that the first counterweight and the valve core have a first gap along the height direction of the pressure-limiting valve, so that the valve body supports the first counterweight. Moreover, since the other counterweights are all located on the side of the first counterweight away from the valve core, the weight of all the counterweights in this state is supported by the support portion. At this time, when the pressure value in the container body reaches a value that can overcome the weight of the valve stem to drive the valve core to move away from the exhaust port, the valve core can open the exhaust port so that the pressure-limiting valve can exhaust.

[0010] In the second state, at least the first counterweight is supported on the valve core, so that the valve core supports the weight of at least the first counterweight. At this time, when the pressure value of the container body reaches a value that can overcome the gravity of the valve stem and the weight of the counterweight supported on the valve core to drive the valve core to move away from the exhaust port, the valve core can open the exhaust port to allow the pressure limiting valve to exhaust. Therefore, the exhaust pressure of the pressure limiting valve in the first state is lower than the exhaust pressure of the pressure limiting valve in the second state, so that the pressure limiting valve has at least two different exhaust pressures, and the user can adjust the pressure value of the cooking container according to actual needs, thereby improving the user's experience. In this solution, the support portion protrudes from the inner wall of the valve body, the counterweight is sleeved on the valve stem, and the outer peripheral wall of the counterweight is provided with an avoidance notch for avoiding the support portion.

[0011] In this solution, when the support portion is located in the avoidance gap of the counterweight block, the counterweight block is not supported by the support portion, and the support portion will not block the movement of the counterweight block along the height direction of the pressure limiting valve, thereby facilitating switching the state of the pressure limiting valve.

[0012] In a specific implementation, the inner wall of the valve body is further provided with a guide portion protruding from the inner wall of the valve body, and the outer peripheral wall of the counterweight block is provided with a groove, and the guide portion can be slidably matched with the groove.

[0013] In this solution, when the pressure limiting valve causes the counterweight to move in the height direction of the pressure limiting valve during the switching process, the groove can slidably cooperate with the guide part, thereby guiding the counterweight and improving the stability of the counterweight moving in the height direction of the pressure limiting valve.

[0014] In a specific implementation, the guide portion is located on a side of the support portion facing the valve cover and is connected to the support portion, and the support portion extends outwardly along the circumferential direction of the valve body relative to the guide portion.

[0015] In this solution, a step surface is formed at the connection between the guide part and the support part, and the counterweight block can abut against the step surface, so that the counterweight block can be supported on the support part. The avoidance notch and the groove are arranged at intervals along the outer peripheral wall of the counterweight block. By driving the counterweight block to rotate, the avoidance notch of the counterweight block can be matched with the guide part, so that the counterweight block can move toward the valve core and be supported on the valve core, or the groove of the counterweight block can be matched with the guide part, so that the counterweight block abuts against the step surface between the guide part and the support part, and then the counterweight block can be supported on the support part. Therefore, the avoidance notch and the groove arranged on the outer peripheral wall of the counterweight block can facilitate the support of the counterweight block on the support part or the valve core, thereby facilitating the switching of the state of the pressure limiting valve.

[0016] In a specific implementation, the support portion extends along a height direction of the pressure limiting valve toward the exhaust port.

[0017] In this solution, when the counterweight block needs to be supported on the valve core, the supporting portion extends along the height direction of the pressure limiting valve toward the exhaust port, which can guide the movement of the counterweight block along the height direction of the pressure limiting valve toward the valve core, which is beneficial to improving the reliability of the counterweight block abutting against the valve core.

[0018] In a specific implementation, the groove and the avoidance gap are arranged at intervals along the circumference of the counterweight block; the cross-sectional area of ​​the groove is smaller than the cross-sectional area of ​​the support portion, so that the counterweight block can be supported on the support portion when the groove cooperates with the guide portion; the cross-sectional area of ​​the avoidance gap is larger than the cross-sectional area of ​​the support portion, so that the counterweight block can be supported on the valve core when the avoidance gap cooperates with the guide portion.

[0019] In this solution, when the groove cooperates with the guide part, since the cross-sectional area of ​​the groove is smaller than the cross-sectional area of ​​the support part, the counterweight block can be supported on the support part and cannot continue to move in the direction of the valve core. When the avoidance notch cooperates with the guide part, since the cross-sectional area of ​​the avoidance notch is larger than the cross-sectional area of ​​the support part, the support part will not block the counterweight block, and the counterweight block can continue to move in the direction of the valve core, so that the counterweight block can be supported on the valve core. Therefore, in this embodiment, by setting the grooves and avoidance notches with different cross-sectional areas, it is possible to conveniently switch the counterweight block to support the support part or the valve core, thereby conveniently switching the state of the pressure-limiting valve.

[0020] In a specific implementation, the counterweight block further includes at least one second counterweight block, and in the first state, the at least one second counterweight block is supported on the first counterweight block.

[0021] In the second state, the at least one second counterweight is supported on the first counterweight, or a portion of the at least one second counterweight is supported on the supporting portion, and another portion of the at least one second counterweight is supported on the first counterweight.

[0022] In this solution, the pressure limiting valve includes an exhaust channel for connecting the air inlet and the exhaust port. During cooking, when the pressure limiting valve is in a first state (low pressure state) and the valve core blocks the exhaust port, the steam in the container body enters the exhaust channel through the air inlet and flows to the exhaust port. At this time, the steam does not accumulate at the exhaust port, and the steam pressure acting on the valve core is small, which is insufficient to drive the valve core to move toward the valve cover along the height direction of the pressure limiting valve. Moreover, the steam accumulates at the exhaust port due to the valve core blocking the exhaust port. 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 stem, causing the valve core to move upward, thereby opening the exhaust port to achieve exhaust.

[0023] During cooking, when the second counterweight of the pressure limiting valve is supported on the supporting part and the valve core blocks the exhaust port, the steam in the container enters the exhaust channel through the air inlet and flows to the exhaust port. At this time, the steam has not accumulated at the exhaust port, and the steam pressure acting on the valve core is small, which is insufficient to drive the valve core to move toward the valve cover along the height direction of the pressure limiting valve. The steam accumulates at the exhaust port due to the valve core blocking the exhaust port. As the pressure in the container gradually increases to the second pressure value during the cooking process, the second pressure can overcome the gravity of the valve stem and other components connected to the valve stem (at least including the first counterweight), so that the valve stem and other components connected to the valve stem move upward, so that the valve core can open the exhaust port to achieve exhaust.

[0024] During cooking, when the second counterweight block of the pressure limiting valve is supported on the first counterweight block and the valve core blocks the exhaust port, the steam in the container body enters the exhaust channel through the air inlet and flows to the exhaust port. At this time, the steam has not accumulated at the exhaust port, and the steam pressure acting on the valve core is small, which is insufficient to drive the valve core to move toward the valve cover along the height direction of the pressure limiting valve. Moreover, the steam accumulates at the exhaust port due to the valve core blocking the exhaust port. As the pressure in the container body gradually increases to a third pressure value during the cooking process, the third pressure can overcome the gravity of the valve stem and other components connected to the valve stem (at least including the first counterweight block and the second counterweight block), so that the valve stem and other components connected to the valve stem move upward, so that the valve core can open the exhaust port to achieve exhaust.

[0025] In summary, the first pressure is less than the second pressure, and the second pressure is less than the third pressure, that is, the first state is the low-pressure state of the pressure-limiting valve, and in the second state, when the second counterweight is supported on the support portion, the pressure-limiting valve is in the medium-pressure state; in the second state, when the second counterweight is supported on the first counterweight, the pressure-limiting valve is in the high-pressure state. Therefore, the pressure-limiting valve is provided with at least two counterweights to increase the exhaust pressure of the pressure-limiting valve, which is more conducive to meeting user needs, reducing the risk of nutrient loss of the food itself due to too low or too high pressure in the cooking container, and thus helping to improve the user experience.

[0026] In a specific implementation, the counterweight block further includes an extension portion extending in the height direction of the pressure limiting valve, and the extension portion is sleeved on the valve stem. The counterweight block is further provided with a recessed portion on a side away from the extension portion, and the extension portion of the counterweight block can extend into the recessed portion of the counterweight block adjacent thereto.

[0027] In this solution, the extension is provided with a mounting hole, and the valve stem can extend into the mounting hole, so that the counterweight is sleeved on the valve stem through the extension. At the same time, in the process of switching the state of the pressure-limiting valve, the extension is convenient for the user to hold the counterweight, thereby improving the convenience of the user driving the counterweight to move. In addition, the counterweight is also provided with a recessed portion on the side away from the extension, so that when the pressure-limiting valve is in the low-pressure state and the high-pressure state, the extension of the first counterweight extends into the recessed portion of the second counterweight, so that the recessed portion of the second counterweight can be used to avoid the extension of the first counterweight, so that the second counterweight can abut against the first counterweight, so that the second counterweight can be supported on the first counterweight.

[0028] In a specific implementation, the valve cover has a matching hole, and the end of the valve stem away from the valve core can slide along the matching hole.

[0029] In this solution, during the exhaust process of the pressure limiting valve, the valve core moves toward the valve cover along the height direction of the pressure limiting valve, and then the end of the valve stem away from the valve core can slide in the matching hole, reducing the risk that the valve stem cannot open the exhaust port due to the resistance of the valve cover, thereby improving the reliability of the valve core opening the exhaust port. At the same time, during the exhaust process of the pressure limiting valve, the valve stem is located in the matching hole, which can reduce the risk of the valve stem shaking, thereby helping to improve the reliability and stability of the pressure limiting valve.

[0030] The second aspect of the present application further provides a container cover, the container cover comprising a cover body and a pressure limiting valve, the pressure limiting valve being the pressure limiting valve described above, wherein the pressure limiting valve is installed on the cover body through the valve body.

[0031] In this solution, the valve body may further include an integrally formed exhaust channel, the exhaust channel is connected to the exhaust port, the exhaust channel extends relative to the cover body, and when the container cover is closed over the container body, the exhaust channel 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, 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.

[0032] 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

[0033] Figure 1 A cross-sectional view of a container cover provided by the present application in a specific embodiment, wherein the pressure limiting valve is in a low-pressure state;

[0034] Figure 2 A cross-sectional view of a container cover provided by the present application in a specific embodiment, wherein the pressure limiting valve is in a medium pressure state;

[0035] Figure 3 A cross-sectional view of a container cover provided by the present application in a specific embodiment, wherein the pressure limiting valve is in a high pressure state;

[0036] Figure 4 This is a schematic diagram of the structure of the avoidance gap and the support part provided in this application;

[0037] Figure 5 A structural schematic diagram showing another perspective of the coordination between the avoidance gap and the support portion provided in the present application;

[0038] Figure 6 This is a schematic diagram of the structure of the groove and the guide part provided in this application;

[0039] Figure 7 This is a schematic diagram of the structure of the valve body provided in this application.

[0040] Description of reference numerals:

[0041] 1-pressure limiting valve;

[0042] 11-valve body;

[0043] 111-valve chamber;

[0044] 112-exhaust port;

[0045] 113-supporting part;

[0046] 113a-step surface;

[0047] 114- guide part;

[0048] 115-air inlet;

[0049] 12-valve cover;

[0050] 121-matching hole;

[0051] 122-exhaust hole;

[0052] 13-valve stem;

[0053] 131-valve core;

[0054] 14- counterweight;

[0055] 141- first counterweight;

[0056] 142 - second counterweight;

[0057] 143-Avoidance gap;

[0058] 144-groove;

[0059] 145- extension;

[0060] 146-depression;

[0061] 2- Cover body.

[0062] 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

[0063] 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.

[0064] In a specific embodiment, the present application is further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] like Figure 1 and Figure 3 As shown, the container cover includes a cover body 2, a pressure limiting valve 1 is installed on the cover body 2, and the pressure limiting valve 1 also includes an air inlet 115 connected with the exhaust port 112. When the container cover is closed on the container body, the air inlet 115 of the pressure limiting valve 1 is connected with the inner cavity of the container body, and the exhaust port 112 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.

[0071] like Figure 1-Figure 3 As shown, the pressure limiting valve 1 includes a valve body 11, a valve cover 12 and a valve stem 13. The valve body 11 has a valve cavity 111 and an exhaust port 112 and an opening connected to the valve cavity 111. The valve cover 12 is detachably connected to the valve body 11 and is used to cover the opening. The valve stem 13 includes a valve core 131, and the valve core 131 can move in the valve cavity 111 along the height direction of the pressure limiting valve 1 to block or open the exhaust port 112. Among them, the pressure limiting valve 1 also includes at least one counterweight 14, and the counterweight 14 can move relative to the valve body 11 along the height direction of the pressure limiting valve 1 to make the pressure limiting valve 1 in the first state or the second state.

[0072] The counterweight 14 closest to the valve core 131 along the height direction of the pressure limiting valve 1 is the first counterweight 141. Figure 4 As shown, the valve body 11 has a supporting portion 113, such as Figure 1 As shown, in the first state, the first counterweight 141 is supported on the support portion 113, so that the first counterweight 141 and the valve core 131 have a first gap along the height direction of the pressure limiting valve 1, as shown in FIG. Figure 2 and Figure 3 As shown, in the second state, the first counterweight 141 is supported on the valve core 131 .

[0073] When the pressure limiting valve 1 is used for cooking, the user first drives the weight block 14 to move before using the pressure limiting valve 1 for cooking, so that the pressure limiting valve 1 switches to the first state or the second state as needed. Figure 1 In the first state shown, the first counterweight 141 can be supported on the support portion 113 of the valve body 11, so that the first counterweight 141 and the valve core 131 have a first gap along the height direction of the pressure limiting valve 1, and the valve body 11 supports the first counterweight 141. Moreover, since the other counterweights 14 are all located on the side of the first counterweight 141 away from the valve core 131, the weight of all the counterweights 14 in this state is supported by the support portion 113. At this time, when the pressure value in the container body reaches a value that can overcome the weight of the valve stem 13 and drive the valve core 131 to move away from the exhaust port 112, the valve core 131 can open the exhaust port 112, so that the pressure limiting valve 1 can exhaust.

[0074] In the second state, at least the first counterweight 141 is supported on the valve core 131, so that the valve core 131 supports at least the weight of the first counterweight 141. At this time, when the pressure value of the container body reaches a value that can overcome the gravity of the valve stem 13 and the weight of the counterweight 14 supported on the valve core 131 to drive the valve core 131 to move away from the exhaust port 112, the valve core 131 can open the exhaust port 112 to allow the pressure limiting valve 1 to exhaust. Therefore, the exhaust pressure of the pressure limiting valve 1 in the first state is lower than the exhaust pressure of the pressure limiting valve 1 in the second state, so that the pressure limiting valve 1 has at least two different exhaust pressures, and the user can adjust the pressure value of the cooking container according to actual needs, thereby improving the user's experience. The valve cover 12 is detachably connected to the valve body 11, so that the valve cover 12 can be removed from the valve body 11, so that the user can take out the counterweight 14 from the valve cavity 111, and then drive the counterweight 14 to move relative to the valve body 11, so as to facilitate the movement of the counterweight 14 to the position where the support portion 113 can be used to support the counterweight 14, or to facilitate the movement of the counterweight 14 to the position where the valve core 131 can be used to support the counterweight 14, so that the pressure-limiting valve 1 can switch between the first state and the second state. The valve cover 12 and the valve body 11 can be connected in a detachable manner such as threaded connection and clamping, and the present application does not limit the detachable connection method of the valve cover 12 and the valve body 11.

[0075] In a possible implementation manner, the pressure limiting valve 1 is further provided with an exhaust hole 122 connected to the valve cavity 111. During the exhaust process of the pressure limiting valve 1, steam passes through the air inlet 115, the exhaust port 112, the valve cavity 111 and the exhaust hole 122 in sequence, and is discharged to the outside from the exhaust hole 122. In a specific embodiment, as Figure 1As shown, the exhaust hole 122 is provided on the valve cover 12. In another possible implementation, the valve body 11 may be provided with an exhaust hole 122 communicating with the valve cavity 111, so that the steam can communicate with the outside through the exhaust hole 122.

[0076] like Figure 1-Figure 3 In the illustrated embodiment, the counterweight 14 further includes at least one second counterweight 142, and in the first state, the at least one second counterweight 142 is supported on the first counterweight 141. In the second state, the at least one second counterweight 142 is supported on the first counterweight 141, or a portion of the at least one second counterweight 142 is supported on the support portion 113, and another portion of the at least one second counterweight 142 is supported on the first counterweight 141.

[0077] The following description takes the pressure limiting valve 1 provided with two counterweights 14 as an example, that is, the pressure limiting valve 1 is provided with a first counterweight 141 and a second counterweight 142 , and the second counterweight 142 is located on the side of the first counterweight 141 away from the valve core 131 .

[0078] In the first state, the first counterweight 141 can be supported on the support portion 113 of the valve body 11, so that the first counterweight 141 and the valve core 131 have a first gap along the height direction of the pressure limiting valve 1, and the second counterweight 142 is supported on the first counterweight 141, and the second counterweight 142 and the valve core 131 have a second gap along the height direction of the pressure limiting valve 1, so that the weight of the first counterweight 141 and the second counterweight 142 can both fall on the support portion 113 of the valve body 11, as shown in FIG. Figure 1 As shown, at this time, when the pressure value in the container body is at the first pressure, the first pressure can overcome the gravity of the valve stem 13 to drive the valve core 131 to open the exhaust port 112, so that the pressure limiting valve 1 can exhaust. In the second state, the second counterweight block 142 is supported on the support portion 113, and the first counterweight block 141 is supported on the valve core 131, so that the weight of the first counterweight block 141 falls on the valve core 131, and the weight of the second counterweight block 142 falls on the valve body 11. Figure 2 As shown, at this time, when the pressure value of the container body reaches the second pressure, the second pressure can overcome the gravity of the valve stem 13 and the gravity of the first counterweight block 141 to drive the valve core 131 to open the exhaust port 112, so that the pressure limiting valve 1 can exhaust. When the first counterweight block 141 and the second counterweight block 142 are both supported on the valve core 131, the weight of the first counterweight block 141 and the second counterweight block 142 falls on the valve core 131, as shown in FIG. Figure 3As shown, at this time, when the pressure value of the container body is the third pressure, the third pressure can overcome the gravity of the valve stem 13 and the gravity of the first counterweight block 141 and the second counterweight block 142 to drive the valve core 131 to open the exhaust port 112, so that the pressure limiting valve 1 can exhaust. That is, when the pressure limiting valve 1 is provided with the first counterweight block 141 and the second counterweight block 142, the pressure limiting valve 1 has at least three different exhaust pressures.

[0079] Specifically, the pressure limiting valve 1 includes an exhaust passage for connecting the air inlet 115 and the exhaust port 112. When cooking, when the pressure limiting valve 1 is in a state such as Figure 1 In the first state (low-pressure state) shown in the figure, when the valve core 131 blocks the exhaust port 112, the steam in the container body enters the exhaust channel through the air inlet 115 and flows to the exhaust port 112. At this time, the steam has not accumulated at the exhaust port 112, and the steam pressure acting on the valve core 131 is small, which is insufficient to drive the valve core 131 to move toward the valve cover 12 along the height direction of the pressure-limiting valve 1. The steam accumulates at the exhaust port 112 because the valve core 131 blocks the exhaust port 112. 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 stem 13, causing the valve core 131 to move upward, thereby opening the exhaust port 112 to achieve exhaust.

[0080] When cooking, Figure 2 As shown, when the second counterweight 142 of the pressure-limiting valve 1 is supported on the supporting portion 113 and the valve core 131 blocks the exhaust port 112, the steam in the container body enters the exhaust channel through the air inlet 115 and flows to the exhaust port 112. At this time, the steam has not accumulated at the exhaust port 112, and the steam pressure acting on the valve core 131 is small, which is insufficient to drive the valve core 131 to move toward the valve cover 12 along the height direction of the pressure-limiting valve 1. The steam accumulates at the exhaust port 112 because the valve core 131 blocks the exhaust port 112. As the pressure in the container body gradually increases to a second pressure value during the cooking process, the second pressure can overcome the gravity of the valve stem 13 and other components connected to the valve stem 13 (at least including the first counterweight 141), so that the valve stem 13 and other components connected to the valve stem 13 move upward, so that the valve core 131 can open the exhaust port 112 to achieve exhaust.

[0081] When cooking, Figure 3As shown, when the second counterweight 142 of the pressure-limiting valve 1 is supported on the first counterweight 141 and the valve core 131 blocks the exhaust port 112, the steam in the container body enters the exhaust channel through the air inlet 115 and flows to the exhaust port 112. At this time, the steam has not accumulated at the exhaust port 112, and the steam pressure acting on the valve core 131 is small, which is insufficient to drive the valve core 131 to move toward the valve cover 12 along the height direction of the pressure-limiting valve 1. The steam accumulates at the exhaust port 112 due to the valve core 131 blocking the exhaust port 112. As the pressure in the container body gradually increases to a third pressure value during the cooking process, the third pressure can overcome the gravity of the valve stem 13 and other components connected to the valve stem 13 (at least including the first counterweight 141 and the second counterweight 142), so that the valve stem 13 and other components connected to the valve stem 13 move upward, so that the valve core 131 can open the exhaust port 112 to achieve exhaust.

[0082] In summary, the first pressure is less than the second pressure, and the second pressure is less than the third pressure, that is, Figure 1 The first state shown is a low-pressure state of the pressure-limiting valve 1. In the second state, when the second counterweight 142 is supported on the support portion 113, the pressure-limiting valve 1 is Figure 2 The medium pressure state shown; Figure 3 As shown, in the second state, when the second counterweight 142 is supported on the first counterweight 141, the pressure limiting valve 1 is in a high pressure state. Therefore, the pressure limiting valve 1 is provided with at least two counterweights 14 to increase the exhaust pressure of the pressure limiting valve 1, which is more conducive to meeting user needs, reducing the risk of nutrient loss of the food itself due to too low or too high pressure in the cooking container, and thus helping to improve the user experience.

[0083] The present application also provides a container cover, which is used to cover the container body. Figure 1-Figure 3 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 installed on the cover body 2 through a valve body 11, and the valve body 11 can be fixedly installed on the cover body 2, including but not limited to welding or bonding, and the valve body 11 can also be detachably installed on the cover body 2, such as screw connection.

[0084] The valve body 11 may also include an integrally formed exhaust channel, the exhaust channel is connected to the exhaust port 112, the exhaust channel extends relative to the lid body 2, and when the container lid covers the container body, the exhaust channel 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, to meet the different cooking requirements of the user, and improve the use experience of the container lid for the container body.

[0085] In a possible implementation, the valve body 11 may also be externally connected to an exhaust pipe, and the exhaust pipe is in communication with the air inlet 115 and the exhaust port 112, so that the steam in the container body can be communicated through the exhaust pipe.

[0086] In a possible implementation, Figure 4 and Figure 5 As shown, the support portion 113 protrudes from the inner wall of the valve body 11 , the counterweight block 14 is sleeved on the valve stem 13 , and an avoidance notch 143 is provided on the outer peripheral wall of the counterweight block 14 for avoiding the support portion 113 .

[0087] In this embodiment, when the support portion 113 is located in the avoidance gap 143 of the counterweight block 14, the counterweight block 14 is not supported by the support portion 113, and the support portion 113 will not block the movement of the counterweight block 14 along the height direction of the pressure limiting valve 1, thereby facilitating the switching of the state of the pressure limiting valve 1.

[0088] Taking the first counterweight 141 as an example, the support portion 113 is located in the avoidance notch 143 of the first counterweight 141, so that the first counterweight 141 can move along the height direction of the pressure-limiting valve 1. When the first counterweight 141 moves toward the valve core 131, the first counterweight 141 can move to abut against the valve core 131; when the first counterweight 141 moves away from the valve core 131, the first counterweight 141 can move to a position with a first gap between the first counterweight 141 and the valve core 131, and be supported by the support portion 113, or the first counterweight 141 can move to leave the valve cavity 111. Therefore, the setting of the avoidance notch 143 can facilitate the adjustment of the position of each counterweight 14, thereby adjusting the state of the pressure-limiting valve 1.

[0089] In a possible implementation, Figure 4 and Figure 6 As shown, the inner wall of the valve body 11 is also provided with a guide portion 114 protruding from the inner wall of the valve body 11, and the outer peripheral wall of the counterweight block 14 is provided with a groove 144, and the guide portion 114 can slide with the groove 144. Among them, the groove 144 and the avoidance gap 143 are arranged at intervals.

[0090] In this embodiment, when the pressure limiting valve 1 causes the counterweight 14 to move along the height direction of the pressure limiting valve 1 during the switching state, the groove 144 can slidably cooperate with the guide portion 114, thereby guiding the counterweight 14 and improving the stability of the counterweight 14 moving along the height direction of the pressure limiting valve 1.

[0091] Specifically, when it is necessary to switch the state of the pressure-limiting valve 1, first remove the valve cover 12 from the valve body 11, and take the counterweight 14 out of the valve cavity 111. During the process of rotating the counterweight 14 to adjust the angle of the counterweight 14 and installing the counterweight 14 in the valve cavity 111, the guide portion 114 extends into the groove 144 of the counterweight 14, so that the counterweight 14 can move along the height direction of the pressure-limiting valve 1 to the position corresponding to the first state or the second state through the guide portion 114. Then, the guide portion 114 plays a guiding role in the process of installing the counterweight 14 in the valve cavity 111, which is beneficial to improve the convenience and stability of installing the counterweight 14 in the valve cavity 111, and provide convenience and stability for switching the state of the pressure-limiting valve 1.

[0092] In a possible implementation, Figure 7 As shown, the guide portion 114 is located on the side of the support portion 113 facing the valve cover 12 and is connected to the support portion 113, and the support portion 113 extends outward along the circumference of the valve body 11 relative to the guide portion 114, so that a step surface 113a is formed at the connection between the guide portion 114 and the support portion 113, and the counterweight block 14 can abut against the step surface 113a, so that the counterweight block 14 can be supported on the support portion 113.

[0093] In this embodiment, the avoidance notch 143 and the groove 144 are arranged at intervals along the outer peripheral wall of the counterweight 14. By driving the counterweight 14 to rotate, the avoidance notch 143 of the counterweight 14 can be matched with the guide portion 114, so that the counterweight 14 can move toward the valve core 131 and be supported on the valve core 131, or the groove 144 of the counterweight 14 can be matched with the guide portion 114, so that the counterweight 14 abuts against the step surface 113a between the guide portion 114 and the support portion 113, and then the counterweight 14 can be supported on the support portion 113. Therefore, the avoidance notch 143 and the groove 144 arranged on the outer peripheral wall of the counterweight 14 can facilitate the counterweight 14 to be supported on the support portion 113 or the valve core 131, so as to facilitate the switching of the state of the pressure limiting valve 1.

[0094] In one possible implementation, Figure 4 As shown, the groove 144 and the avoidance notch 143 are arranged at intervals along the circumference of the counterweight 14, the cross-sectional area of ​​the groove 144 is smaller than the cross-sectional area of ​​the support portion 113, and the cross-sectional area of ​​the avoidance notch 143 is larger than the cross-sectional area of ​​the support portion 113. The guide portion 114 can cooperate with the avoidance notch 143 so that the counterweight 14 can be supported on the valve core 131, or the guide portion 114 can cooperate with the groove 144 so that the counterweight 14 can be supported on the support portion 113.

[0095] In this embodiment, when the groove 144 cooperates with the guide portion 114, since the cross-sectional area of ​​the groove 144 is smaller than the cross-sectional area of ​​the support portion 113, the counterweight 14 can be supported on the support portion 113 and cannot continue to move in the direction of the valve core 131. When the avoidance notch 143 cooperates with the guide portion 114, since the cross-sectional area of ​​the avoidance notch 143 is larger than the cross-sectional area of ​​the support portion 113, the support portion 113 will not block the counterweight 14, and the counterweight 14 can continue to move in the direction of the valve core 131, so that the counterweight 14 can be supported on the valve core 131. Therefore, in this embodiment, by setting the grooves 144 and the avoidance notch 143 with different cross-sectional areas, it is possible to conveniently switch the counterweight 14 to be supported on the support portion 113 or the valve core 131, thereby conveniently switching the state of the pressure limiting valve 1.

[0096] In a possible embodiment, the counterweight block 14 may be provided with a plurality of avoidance notches 143 and grooves 144 at intervals, which is beneficial to improving the convenience of installing the counterweight block 14 on the valve body 11, while improving the reliability of installing the counterweight block 14 on the valve body 11, reducing the risk of the counterweight block 14 rotating relative to the valve body 11 after installation, and improving the stability and reliability of the pressure limiting valve 1.

[0097] Specifically, when the pressure limiting valve 1 switches from the low pressure state to the medium pressure state, that is, from Figure 1 Switch to Figure 2 In the pressure limiting valve 1 shown, the user removes the valve cover 12 from the valve body 11, and then takes out the first counterweight 141 and the second counterweight 142 in the valve cavity 111 from the valve cavity 111, and drives the first counterweight 141 to rotate and adjust its angle. When each counterweight 14 is installed in the valve body 11, the avoidance notch 143 of the first counterweight 141 is matched with the guide portion 114, and the groove 144 is not matched with the guide portion 114. When the first counterweight 141 moves toward the valve core 131 along the height direction of the pressure limiting valve 1, the support portion 113 avoids through the avoidance notch 143, so that the support portion 113 does not block the first counterweight 141 from moving toward the valve core 131, so that the first counterweight 141 can be placed on the valve core 131. The groove 144 of the second counterweight 142 is matched with the guide portion 114, and the avoidance notch 143 of the second counterweight 142 is not matched with the guide portion 114, so that the second counterweight 142 can slide along the guide portion 114 until it abuts against the step surface 113a, and then the support portion 113 can support the second counterweight 142, so that there is a first gap between the second counterweight 142 and the valve core 131. That is, the first counterweight 141 is supported on the valve core 131, and the second counterweight 142 is supported on the support portion 113 of the valve body 11. At this time, the pressure limiting valve 1 is in a medium pressure state.

[0098] When the pressure limiting valve 1 switches from the medium pressure state to the low pressure state, that is, from Figure 2 The pressure limiting valve 1 shown is switched to Figure 1 In the pressure limiting valve 1 shown, the user removes the valve cover 12 from the valve body 11, and then takes out the first counterweight 141 and the second counterweight 142 in the valve cavity 111 from the valve cavity 111, and drives the first counterweight 141 to rotate and adjust its angle. When each counterweight 14 is installed in the valve body 11, the avoidance notch 143 of the first counterweight 141 does not match the guide portion 114, and the groove 144 matches the guide portion 114. When the first counterweight 141 moves toward the valve core 131 along the height direction of the pressure limiting valve 1, the support portion 113 cannot avoid through the avoidance notch 143, so that the support portion 113 can block the first counterweight 141 from moving toward the valve core 131, so that the first counterweight 141 can slide along the guide portion 114 until it abuts against the step surface 113a, and then the support portion 113 can support the first counterweight 141. The groove 144 of the second counterweight block 142 cooperates with the guide portion 114, and the avoidance notch 143 of the second counterweight block 142 does not cooperate with the guide portion 114, so that the second counterweight block 142 can slide along the guide portion 114 until it abuts against the first counterweight block 141 located on the step surface 113a, so that the first counterweight block 141 and the valve core 131 have a first gap, and the second counterweight block 142 and the valve core 131 have a second gap, that is, the first counterweight block 141 and the second counterweight block 142 are both supported on the support portion 113. At this time, the pressure-limiting valve 1 is in a low-pressure state.

[0099] When the pressure limiting valve 1 switches from the medium pressure state to the high pressure state, that is, from Figure 2 The pressure limiting valve 1 shown is switched to Figure 3 In the pressure limiting valve 1 shown, the user removes the valve cover 12 from the valve body 11, and then only needs to take out the second counterweight 142 in the valve cavity 111 from the valve cavity 111, that is, there is no need to drive the first counterweight 141 to move, and drive the second counterweight 142 to rotate and adjust its angle. When the second counterweight 142 is installed in the valve body 11, the groove 144 of the second counterweight 142 is not matched with the guide part 114, and the avoidance notch 143 of the second counterweight 142 is matched with the guide part 114. When the second counterweight 142 moves toward the valve core 131 along the height direction of the pressure limiting valve 1, the support part 113 avoids through the avoidance notch 143, so that the support part 113 will not block the second counterweight 142 from moving toward the valve core 131, so that the second counterweight 142 can be placed on the first counterweight 141 supported by the valve core 131. Then, the second counterweight 142 can be placed on the first counterweight 141 , and at this time, the pressure-limiting valve 1 is in a high-pressure state.

[0100] When the pressure limiting valve 1 switches from the high pressure state to the medium pressure state, that is, from Figure 3 The pressure limiting valve 1 shown is switched to Figure 2For the pressure-limiting valve 1 shown, the user removes the valve cover 12 from the valve body 11 , and then only needs to take out the second counterweight 142 in the valve cavity 111 , i.e., there is no need to drive the first counterweight 141 to move, but drive the second counterweight 142 to rotate and adjust its angle. When the second counterweight 142 is installed in the valve body 11, the groove 144 of the second counterweight 142 cooperates with the guide portion 114, and the avoidance notch 143 of the second counterweight 142 does not cooperate with the guide portion 114. When the second counterweight 142 moves along the height direction of the pressure-limiting valve 1 toward the valve core 131, the support portion 113 cannot avoid through the avoidance notch 143, so that the support portion 113 can block the second counterweight 142 from moving toward the valve core 131, so that the second counterweight 142 can slide along the guide portion 114 until it abuts against the step surface 113a, so that the second counterweight 142 and the valve core 131 have a first gap, that is, the second counterweight 142 is supported on the support portion 113 of the valve body 11. At this time, the pressure-limiting valve 1 is in a medium pressure state.

[0101] In addition, the limit can also be switched directly from a low pressure state to a high pressure state, or, alternatively, from a high pressure state to a high pressure state.

[0102] Specifically, when the pressure limiting valve 1 switches from a low pressure state to a high pressure state, that is, from Figure 1 The pressure limiting valve 1 shown is switched to Figure 3 For the pressure-limiting valve 1 shown, the user removes the valve cover 12 from the valve body 11 , and then takes out the first counterweight 141 and the second counterweight 142 in the valve cavity 111 , and drives the first counterweight 141 and the second counterweight 142 to rotate and adjust their angles. When each counterweight 14 is installed in the valve body 11, the avoidance notches 143 of the first counterweight 141 and the second counterweight 142 are both matched with the guide part 114, and the grooves 144 are not matched with the guide part 114. When the first counterweight 141 and the second counterweight 142 move toward the valve core 131 along the height direction of the pressure-limiting valve 1, the support part 113 avoids through the avoidance notch 143, so that the support part 113 will not block the first counterweight 141 and the second counterweight 142 from moving toward the valve core 131, and then the first counterweight 141 can abut against the valve core 131, and the second counterweight 142 can abut against the first counterweight 141, that is, the first counterweight 141 and the second counterweight 142 can both be supported on the valve core 131. At this time, the pressure-limiting valve 1 is in a high-pressure state.

[0103] When the pressure limiting valve 1 switches from a high pressure state to a low pressure state, that is, from Figure 3 The pressure limiting valve 1 shown is switched to Figure 1In the pressure-limiting valve 1 shown, the user removes the valve cover 12 from the valve body 11, and then takes out the first counterweight 141 and the second counterweight 142 in the valve cavity 111 from the valve cavity 111, and drives the first counterweight 141 and the second counterweight 142 to rotate and adjust their angles. When installing each counterweight 14 in the valve body 11, the avoidance notches 143 of the first counterweight 141 and the second counterweight 142 are not matched with the guide portion 114, and the grooves 144 are matched with the guide portion 114. When the first counterweight 141 and the second counterweight 142 move toward the valve core 131 along the height direction of the pressure-limiting valve 1, the support portion 113 cannot avoid through the avoidance notch 143, so that the support portion 113 can block the first counterweight 141 and the second counterweight 142 from moving toward the valve core. 131 moves, so that the first counterweight block 141 can slide along the guide portion 114 until it abuts against the step surface 113a, and the second counterweight block 142 can slide along the guide portion 114 until it abuts against the first counterweight block 141, thereby making the first counterweight block 141 and the valve core 131 have a first gap, and the second counterweight block 142 and the valve core 131 have a second gap, that is, the first counterweight block 141 and the second counterweight block 142 can both support the supporting portion 113 of the valve body 11. At this time, the pressure-limiting valve 1 is in a low-pressure state.

[0104] In summary, the support portion 113 extends outwardly along the circumference of the valve body 11 relative to the guide portion 114 to form a step surface 113a for abutting against the counterweight 14, which is beneficial to improving the stability and reliability of the pressure-limiting valve 1 in maintaining the low-pressure state and the medium-pressure state.

[0105] In a possible implementation, Figure 7 As shown, the support portion 113 extends along the height direction of the pressure limiting valve 1 toward the exhaust port 112 .

[0106] In this embodiment, when the counterweight 14 needs to be supported on the valve core 131, the support portion 113 extends along the height direction of the pressure-limiting valve 1 toward the exhaust port 112, which can guide the movement of the counterweight 14 along the height direction of the pressure-limiting valve 1 toward the valve core 131, which is beneficial to improving the reliability of the counterweight 14 abutting against the valve core 131.

[0107] In a possible implementation, Figure 7 As shown, the outer contour of the support portion 113 is arc-shaped, and the inner wall of the avoidance gap 143 is arc-shaped.

[0108] In this embodiment, the outer contour of the support portion 113 is arc-shaped, and the inner wall of the avoidance notch 143 is arc-shaped. In the process of sliding along the support portion 113, the avoidance notch 143 of the counterweight 14 reduces the risk of mutual wear between the avoidance notch 143 and the support portion 113 along the height direction of the pressure-limiting valve 1, which is conducive to improving the service life of the counterweight 14 and the valve body 11, and further to improving the service life of the pressure-limiting valve 1. At the same time, during the exhaust process of the pressure-limiting valve 1, the cooperation between the avoidance notch 143 and the support portion 113 can reduce the risk of the counterweight 14 rotating relative to the valve body 11, which is conducive to improving the reliability of the pressure-limiting valve 1 during the exhaust process.

[0109] In a possible implementation, Figure 3 As shown, the counterweight 14 further includes an extension portion 145 extending in the height direction of the pressure limiting valve 1, and the extension portion 145 is sleeved on the valve stem 13. The counterweight 14 is further provided with a recessed portion 146 on a side away from the extension portion 145, and the extension portion 145 of the counterweight 14 can extend into the recessed portion 146 of the counterweight 14 adjacent thereto.

[0110] In this embodiment, the extension portion 145 is provided with a mounting hole, and the valve stem 13 can extend into the mounting hole, so that the counterweight 14 is sleeved on the valve stem 13 through the extension portion 145. At the same time, in the process of switching the state of the pressure limiting valve 1, the extension portion 145 is convenient for the user to hold the counterweight 14, thereby improving the convenience of the user driving the counterweight 14 to move. In addition, the counterweight 14 is also provided with a recessed portion 146 on the side away from the extension portion 145, so that when the pressure limiting valve 1 is in the low pressure state and the high pressure state, the extension portion 145 of the first counterweight 141 extends into the recessed portion 146 of the second counterweight 142, so that the recessed portion 146 of the second counterweight 142 can be used to avoid the extension portion 145 of the first counterweight 141, so that the second counterweight 142 can abut against the first counterweight 141, so that the second counterweight 142 can be supported on the first counterweight 141.

[0111] In a possible implementation, Figure 1-Figure 3 As shown, the valve cover 12 has a matching hole 121 , and one end of the valve stem 13 away from the valve core 131 can slide along the matching hole 121 .

[0112] In this embodiment, during the exhaust process of the pressure-limiting valve 1, the valve core 131 moves toward the valve cover 12 along the height direction of the pressure-limiting valve 1, and then the end of the valve stem 13 away from the valve core 131 can slide in the matching hole 121, reducing the risk that the valve stem 13 cannot open the exhaust port 112 due to the resistance of the valve cover 12, thereby improving the reliability of the valve core 131 opening the exhaust port 112. At the same time, during the exhaust process of the pressure-limiting valve 1, the valve stem 13 is located in the matching hole 121, which can reduce the risk of the valve stem 13 shaking, thereby helping to improve the reliability and stability of the operation of the pressure-limiting valve 1.

[0113] 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: A valve body (11), the valve body (11) comprising a valve cavity (111) and an exhaust port (112) and an opening communicating with the valve cavity (111), the valve body (11) comprising a support portion (113); a valve cover (12), the valve cover (12) being detachably connected to the valve body (11) and being used to cover the opening; a valve stem (13), the valve stem (13) comprising a valve core (131), the valve core (131) being capable of moving in the valve cavity (111) along the height direction of the pressure limiting valve (1) to block or open the exhaust port (112); The pressure-limiting valve (1) further comprises at least one counterweight (14), wherein the counterweight (14) is capable of moving relative to the valve body (11) along a height direction of the pressure-limiting valve (1) so that the pressure-limiting valve (1) is in a first state or a second state; The counterweight block (14) which is closest to the valve core (131) along the height direction of the pressure-limiting valve (1) is a first counterweight block (141); in the first state, the first counterweight block (141) is supported on the support portion (113) so that there is a first gap between the first counterweight block (141) and the valve core (131) along the height direction of the pressure-limiting valve (1); in the second state, the first counterweight block (141) is supported on the valve core (131).

2. The pressure limiting valve according to claim 1, characterized in that: The support portion (113) protrudes from the inner wall of the valve body (11), the counterweight block (14) is sleeved on the valve stem (13), and the outer peripheral wall of the counterweight block (14) is provided with an avoidance notch (143) for avoiding the support portion (113).

3. The pressure limiting valve according to claim 2, characterized in that: The inner wall of the valve body (11) is also provided with a guide portion (114) protruding from the inner wall of the valve body (11), and the outer peripheral wall of the counterweight block (14) is provided with a groove (144), and the guide portion (114) can be slidably matched with the groove (144).

4. The pressure limiting valve according to claim 3, characterized in that: The guide portion (114) is located on a side of the support portion (113) facing the valve cover (12) and is connected to the support portion (113). The support portion (113) extends outwardly along the circumference of the valve body (11) relative to the guide portion (114).

5. The pressure limiting valve according to claim 4, characterized in that: The groove (144) and the avoidance notch (143) are arranged at intervals along the circumference of the counterweight block (14); The cross-sectional area of ​​the groove (144) is smaller than the cross-sectional area of ​​the support portion (113), so that when the groove (144) cooperates with the guide portion (114), the counterweight (14) can be supported on the support portion (113); The cross-sectional area of ​​the avoidance notch (143) is greater than the cross-sectional area of ​​the support portion (113), so that the counterweight (14) can be supported on the valve core (131) when the avoidance notch (143) cooperates with the guide portion (114).

6. The pressure limiting valve according to claim 2, characterized in that: The support portion (113) extends along the height direction of the pressure limiting valve (1) towards the exhaust port (112).

7. The pressure limiting valve according to any one of claims 1 to 6, characterized in that: The counterweight block (14) further comprises at least one second counterweight block (142); in the first state, the at least one second counterweight block (142) is supported on the first counterweight block (141); In the second state, the at least one second counterweight (142) is supported on the first counterweight (141), or a portion of the at least one second counterweight (142) is supported on the supporting portion (113), and another portion of the at least one second counterweight (142) is supported on the first counterweight (141).

8. The pressure limiting valve according to any one of claims 1 to 6, characterized in that: The counterweight block (14) further comprises an extension portion (145) extending along the height direction of the pressure limiting valve (1), and the extension portion (145) is sleeved on the valve stem (13); The counterweight block (14) is further provided with a recessed portion (146) on a side facing away from the extension portion (145), and the extension portion (145) of the counterweight block (14) can extend into the recessed portion (146) of the counterweight block (14) adjacent thereto.

9. The pressure limiting valve according to any one of claims 1 to 6, characterized in that: The valve cover (12) has a matching hole (121), and an end of the valve stem (13) away from the valve core (131) can slide along the matching hole (121).

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 installed on the cover body (2) through the valve body (11).

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