Pressure limiting structure and pressure cooker having the same

Abstract

The present invention provides a pressure limiting structure and a pressure cooker having the same. The pressure limiting structure comprises a weight assembly, an adjusting component and a position detecting component. The weight assembly comprises a blocking portion for being inserted into a pipe opening of an exhaust pipe. The weight assembly comprises a plurality of weights, which are stacked in sequence along a vertical direction. The adjusting component is in transmission cooperation with at least part of the plurality of weights, so as to adjust the number of weights pressed on a fixing plate of the exhaust pipe by lifting at least part of the plurality of weights. The position detecting component is arranged on one side of the adjusting component to detect the position of the position detecting component of the adjusting component. That is, multi-level pressure limiting is achieved by adjusting the number of weights pressed on the exhaust pipe. The pressure limiting structure is applied to a pressure cooker to limit the pressure of the pressure cooker, so as to achieve multi-level pressure limiting of the pressure cooker, thereby solving the problem that the pressure limiting method of the pressure cooker in the prior art cannot achieve multi-level pressure limiting.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a pressure limiting structure and a pressure cooker having the same. Background Art

[0002] A pressure cooker is also called a pressure cooker or a pressure cooker. It is a kind of kitchen cookware. The pressure cooker uses the physical phenomenon that the boiling point of liquid increases at a higher pressure to apply pressure to water, so that the water can reach a higher temperature without boiling, thereby speeding up the efficiency of stewing food. It can be used to heat the food to be steamed to above 100℃. In high altitude areas, the use of a pressure cooker can avoid the problem of the water boiling point lowering and making it difficult to cook food.

[0003] However, the existing pressure cooker limits the pressure by arranging a fixed-weight pressure-limiting valve on the exhaust pipe, but this pressure-limiting method cannot achieve multi-stage pressure limiting. Summary of the invention

[0004] The main purpose of the present invention is to provide a pressure limiting structure and a pressure cooker having the same, so as to solve the problem that the pressure limiting method of the pressure cooker in the prior art cannot achieve multi-stage pressure limiting.

[0005] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, there is provided a pressure limiting structure, which includes: a weight assembly, the weight assembly having a sealing portion for being inserted into the pipe mouth of the exhaust pipe; the weight assembly including a plurality of weights, the plurality of weights being stacked in sequence along the vertical direction; an adjusting component, the adjusting component being transmission-coordinated with at least some of the plurality of weights to adjust the number of weights pressed on the exhaust pipe by lifting at least some of the plurality of weights; and a position detecting component, the position detecting component being arranged on one side of the adjusting component to detect the position of the adjusting component.

[0006] Furthermore, a micro-movement contact piece is provided on the adjusting component, and the position detecting component is a micro-movement switch, so that the micro-movement contact piece can trigger the micro-movement switch.

[0007] Furthermore, there are multiple micro-movement contact pieces, and the multiple micro-movement contact pieces are arranged at intervals along the movement direction of the adjusting component.

[0008] Furthermore, two adjacent weights are detachably connected, and have a first connection state and a second connection state; when the two adjacent weights are in the first connection state, the two adjacent weights are relatively fixed in the vertical direction; when the two adjacent weights are in the second connection state, the two adjacent weights have a predetermined movement stroke for relative movement in the vertical direction.

[0009] Furthermore, when two adjacent weights are in a first connection state, the two adjacent weights are threadedly connected; each weight has a lifting state that separates its gravity from the exhaust pipe, and when each weight is in the lifting state, the threaded connection between the weight and its adjacent weight is in an unlocked state.

[0010] Furthermore, the multiple weights include a first weight located at the bottom layer, and each weight located above the first weight has a threaded mating section and a smooth mating section that are connected to each other, and each smooth mating section is located above the corresponding threaded mating section; each weight is provided with a threaded mating portion that matches with the threaded mating section of the weight located above the weight; when each weight is in an initial state, the threaded mating portion of the weight matches with the threaded mating section of the weight above the weight; when each weight is in a lifted state, the threaded mating portion of the weight is located in the smooth mating section of the weight above the weight.

[0011] Furthermore, the multiple weights include a second weight located at the top layer, and the blocking portion is arranged on the second weight; the adjusting component and the weights located below the second weight are both limitedly matched to lift each weight located below the second weight one by one.

[0012] Furthermore, the adjusting component includes a rotating disk, a positioning block is provided on the rotating disk, and the weight assembly has a positioning groove, so that the matching relationship between the positioning block and the positioning groove can be adjusted by rotating the rotating disk to lift or release at least part of the multiple weights.

[0013] Further, there is one positioning block and there are multiple positioning grooves, and at least two of the multiple positioning grooves have a depth difference in the vertical direction, so that the height of at least some of the multiple weights can be raised by inserting the positioning block in the corresponding positioning groove; or, there are multiple positioning blocks and positioning grooves, and the multiple positioning blocks and the multiple positioning grooves are arranged along the circumference of the rotating disk; at least two of the multiple positioning blocks have a height difference in the vertical direction, and at least two of the multiple positioning grooves have a depth difference in the vertical direction, so that the height of at least some of the multiple weights can be raised by inserting each positioning block in the corresponding positioning groove.

[0014] Furthermore, the positioning groove is a strip groove, and the top wall of the positioning groove gradually extends in the vertical direction along the rotation direction of the rotating disk; the positioning block is inserted in the positioning groove, so that when the rotating disk rotates, at least part of the multiple weights can be lifted or released through the cooperation between the top wall of the positioning block and the top wall of the positioning groove.

[0015] Furthermore, the adjusting component also includes a rotating gear portion, which is arranged on the rotating disk to drive the rotating disk to rotate by pushing the rotating gear portion.

[0016] Furthermore, the adjusting component also includes a sleeve portion and a locking portion, the sleeve portion is sleeved on the rotating disk, the locking portion is arranged on the sleeve portion, at least part of the locking portion is telescopically arranged in the cavity of the sleeve portion, the locking portion is engaged with the rotating tooth portion, so as to push the rotating disk to rotate through the locking portion when the sleeve portion rotates; or, a pawl portion, the pawl portion cooperates with the rotating tooth portion to drive the rotating disk to rotate by driving the rotating tooth portion to rotate.

[0017] Further, the multiple weights include a second weight, on which the sealing portion is arranged; a first weight, at least part of which is located below the second weight; a rotating disk, on which a first positioning block is arranged on the disk surface, and on which a first positioning groove is arranged, and the rotating disk has an initial position and a first working position; wherein, when the rotating disk is located at the initial position, the first weight and the second weight are in a mutually locked state, and the first positioning block is located in the first positioning groove, so that the first weight and the second weight are simultaneously in an initial state in which their weight is applied to the exhaust pipe; when the rotating disk is in the first working position, the first weight and the second weight are in a mutually unlocked state, and the first positioning block is moved out of the first positioning groove to lift the first weight, so that the first weight is in a lifted state in which its weight is separated from the exhaust pipe.

[0018] Further, when the rotating disk is located at the initial position, the first weight is threadedly connected to the second weight; when the rotating disk is located at the first working position, the threaded connection between the first weight and the second weight is in an unlocked state.

[0019] Furthermore, a second positioning groove is arranged on the first weight, and the depth of the second positioning groove is smaller than the depth of the first positioning groove; when the rotating disk is in the first working position, the first positioning block is clamped in the second positioning groove.

[0020] Furthermore, a second positioning block is arranged on the disk surface of the rotating disk, and the second positioning block matches with the second positioning groove; when the rotating disk is in the initial position, the second positioning block is clamped in the second positioning groove.

[0021] Furthermore, the multiple weights also include a third weight, which is arranged between the first weight and the second weight; a third positioning block is arranged on the disk surface of the rotating disk, the third positioning block is arranged on the outside of the first positioning block, and a third positioning groove is arranged on the third weight, and the third positioning groove extends along the circumference of the third weight; the rotating disk also includes a second working position, and the initial position, the first working position and the second working position are arranged in sequence along the rotation direction of the rotating disk; wherein, when the rotating disk is located at the initial position and the first working position, the third weight and the second weight are in a mutually locked state, and the third positioning block is located in the third positioning groove, so that the third weight is in an initial state of applying its gravity to the exhaust pipe; when the rotating disk moves to the second working position, the third weight and the second weight are in a mutually unlocked state, and the third positioning block is moved out of the third positioning groove to lift the third weight.

[0022] Furthermore, a fourth positioning groove is arranged on the first weight, and the depth of the fourth positioning groove is smaller than the depth of the first positioning groove; when the rotating disk is in the second working position, the first positioning block is clamped in the fourth positioning groove.

[0023] Furthermore, a fourth positioning block is provided on the rotating disk, and the fourth positioning block matches with the fourth positioning groove; when the rotating disk is in the initial position, the fourth positioning block is located in the fourth positioning groove.

[0024] Further, when the rotating disk is in the initial position, the first weight is threadedly connected to the third weight, and the second weight is threadedly connected to the third weight; when the rotating disk is in the first working position, the threaded connection between the first weight and the third weight is in an unlocked state, and the second weight is threadedly connected to the third weight; when the rotating disk is in the second working position, the threaded connection between the first weight and the third weight is in an unlocked state, and the threaded connection between the second weight and the third weight is in an unlocked state.

[0025] Furthermore, the pressure limiting structure also includes a fixing plate, which is provided with a positioning hole and an avoidance hole for avoiding the exhaust pipe; wherein the multiple weights include a first weight located at the bottom layer, and the first weight is provided with a positioning column for being inserted into the positioning hole.

[0026] According to another aspect of the present invention, a pressure cooker is provided, which comprises an exhaust pipe and the above-mentioned pressure limiting structure, wherein the pressure limiting structure is used to apply gravity pressure to the exhaust pipe.

[0027] According to the technical solution of the present invention, the pressure limiting structure includes a weight assembly and an adjusting component, the sealing portion of the weight assembly is used to be inserted into the pipe mouth of the exhaust pipe to form a sealing effect on the exhaust pipe; the weight assembly includes a plurality of weights, and the plurality of weights are stacked in sequence along the vertical direction to play a pressure limiting role through the plurality of weights; the adjusting component is in transmission cooperation with at least part of the plurality of weights, that is, through the cooperation between the adjusting component and at least part of the plurality of weights, at least part of the plurality of weights can be lifted, and then by lifting at least part of the plurality of weights, the number of weights pressed on the exhaust pipe can be adjusted, that is, multi-level pressure limiting can be achieved by adjusting the number of weights pressed on the exhaust pipe; the pressure limiting structure is applied to a pressure cooker to limit the pressure of the pressure cooker, so as to achieve multi-level pressure limiting of the pressure cooker, so as to achieve multi-level pressure protection and multiple cooking effects of the pressure cooker, thereby solving the problem that the pressure limiting method of the pressure cooker in the prior art cannot achieve multi-level pressure limiting.

[0028] In addition, the pressure limiting structure also includes a position detection component, which is arranged on one side of the adjusting component to detect the position of the adjusting component, and then determine the matching state between the adjusting component and at least part of the multiple weights through the detected position information of the adjusting component, thereby determining the number of weights pressed on the fixed plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0030] Figure 1 A schematic diagram of the matching structure between the pressure limiting structure and the exhaust pipe after removing the position detection component according to the first embodiment of the present invention is shown;

[0031] Figure 2 Shows Figure 1 An internal cross-sectional view of the pressure limiting structure in the exhaust pipe after the position detection component is removed;

[0032] Figure 3 Shows Figure 1 A schematic diagram of the matching structure of the first weight and the fixed plate of the pressure limiting structure;

[0033] Figure 4 Shows Figure 1 Schematic diagram of the explosion structure of the first heavy hammer and the second heavy hammer of the pressure limiting structure;

[0034] Figure 5 Shows Figure 1 A schematic diagram of the state when the rotating disk of the pressure limiting structure is in the initial position;

[0035] Figure 6 It shows a schematic diagram of the matching structure between the pressure limiting structure and the exhaust pipe after removing the position detection component according to the second embodiment of the present invention;

[0036] Figure 7 Shows Figure 6 An internal cross-sectional view of the pressure limiting structure in the exhaust pipe after the position detection component is removed;

[0037] Figure 8 Shows Figure 6 A schematic diagram of the explosion structure of the pressure limiting structure and the exhaust pipe after the position detection component is removed;

[0038] Fig. 9 Shows Figure 6 A schematic diagram of the distribution structure of the positioning blocks of the regulating components of the pressure limiting structure;

[0039] Fig.10 Shows Figure 6 A schematic diagram of the structure of the first weight of the pressure limiting structure;

[0040] Fig.11 Shows Figure 6 A schematic diagram of a state in which the rotating disk of the pressure limiting structure is in the first working position;

[0041] Fig.12 Shows Figure 6 A schematic diagram of the state when the rotating disk of the pressure limiting structure is in the second working position;

[0042] Fig.13 A schematic structural diagram of an optional pressure limiting structure according to the present invention is shown;

[0043] Fig.14 Shows Fig.13 A schematic diagram of the structure of the pressure limiting structure after removing the position detection component;

[0044] Fig.15 Shows Fig.13 A schematic diagram of a state in which a pushing assembly of an adjusting component of a pressure limiting structure is in its initial position;

[0045] Fig.16 Shows Fig.13 A schematic diagram of a process in which a driving component of an adjusting component of a pressure limiting structure drives a rotating disk to rotate;

[0046] Fig.17 A schematic structural diagram of another optional pressure limiting structure according to the present invention is shown;

[0047] Fig.18 Shows Fig.17A schematic diagram of the structure of the pressure limiting structure after removing the position detection component;

[0048] Fig.19 Shows Fig.17 A schematic diagram of a state in which a pushing assembly of an adjusting component of a pressure limiting structure is in its initial position;

[0049] Fig. 20 Shows Fig.17 Schematic diagram of the process in which the pushing component of the adjusting component of the pressure limiting structure pushes the rotating disk to rotate.

[0050] The above drawings include the following reference numerals:

[0051] 101. pressure limiting structure; 104. exhaust pipe;

[0052] 110, fixing plate; 112, positioning hole; 113, avoidance hole;

[0053] 130. Heavy hammer assembly;

[0054] 131, first weight; 1312, positioning column; 1314, first clearance hole;

[0055] 132, second weight; 1324, blocking portion; 1325, second clearance hole;

[0056] 135, positioning groove; 1351, first positioning groove; 1352, second positioning groove;

[0057] 1371, threaded mating section; 1372, smooth mating section; 1373, threaded mating portion;

[0058] 140, adjusting component; 141, rotating disk; 143, rotating gear portion;

[0059] 142, positioning block; 1421, first positioning block; 1422, second positioning block;

[0060] 1441, sleeve portion; 1442, locking portion; 1443, first elastic member; 1445, mounting seat; 1446, first transmission plate; 1447, second transmission plate; 1448, first limiting column; 1449, first driving component; 1450, limiting channel;

[0061] 1451, ratchet portion; 1452, push plate; 1453, second elastic member; 1454, second limiting column; 1455, second driving member;

[0062] 146. Micro-touch pad;

[0063] 160. Position detection component; 161. Fixed seat;

[0064] 102. Pressure limiting structure;

[0065] 133, third weight hammer; 1331, third limit rod; 1332, third clearance hole;

[0066] 1353, third positioning groove; 1354, fourth positioning groove;

[0067] 1423. The third positioning block; 1424. The fourth positioning block. DETAILED DESCRIPTION

[0068] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0069] The present invention provides a pressure limiting structure, please refer to Figures 1 to 20 The pressure limiting structure includes a weight assembly 130, an adjusting component 140 and a position detecting component 160. The weight assembly 130 has a sealing portion 1324 for being inserted into the pipe mouth of the exhaust pipe 104; the weight assembly 130 includes a plurality of weights, and the plurality of weights are stacked in sequence along the vertical direction; the adjusting component 140 is in transmission cooperation with at least some of the plurality of weights to adjust the number of weights pressed on the exhaust pipe 104 by lifting at least some of the plurality of weights; the position detecting component 160 is arranged on one side of the adjusting component 140 to detect the position of the adjusting component 140.

[0070] In the pressure limiting structure of the present invention, the pressure limiting structure includes a weight assembly 130 and an adjusting component 140. The blocking portion 1324 of the weight assembly 130 is used to be inserted into the pipe opening of the exhaust pipe 104 to form a blocking effect on the exhaust pipe 104. The weight assembly 130 includes a plurality of weights, and the plurality of weights are stacked in sequence in the vertical direction to play a pressure limiting role through the plurality of weights. The adjusting component 140 is in transmission cooperation with at least some of the plurality of weights, that is, through the cooperation between the adjusting component 140 and at least some of the plurality of weights , it is possible to lift at least some of the multiple weights, and then adjust the number of weights pressed on the exhaust pipe 104 by lifting at least some of the multiple weights, that is, to achieve multi-level pressure limiting by adjusting the number of weights pressed on the exhaust pipe 104; the pressure limiting structure is applied to the pressure cooker to limit the pressure of the pressure cooker, thereby achieving multi-level pressure limiting of the pressure cooker, so as to achieve multi-level pressure protection and multiple cooking effects of the pressure cooker, thereby solving the problem that the pressure limiting method of the pressure cooker in the prior art cannot achieve multi-level pressure limiting.

[0071] In addition, the pressure limiting structure also includes a position detection component 160, which is arranged on one side of the adjusting component 140 to detect the position of the adjusting component 140, and then determine the matching state between the adjusting component 140 and at least part of the multiple weights through the detected position information of the adjusting component 140, thereby determining the number of weights pressed on the fixed plate 110.

[0072] Specifically, a micro-contact piece 146 is provided on the adjusting component 140, and the position detecting component 160 is a micro-switch, so that the micro-contact piece 146 triggers the micro-switch, and then determines the position information of the micro-contact piece 146 that triggers the micro-switch.

[0073] Specifically, there are a plurality of micro-movement contact pieces 146, which are arranged at intervals along the moving direction of the adjusting component 140. When two adjacent micro-movement contact pieces 146 trigger the micro switch in sequence, the position information between the two adjacent micro-movement contact pieces 146 can be determined.

[0074] Specifically, two adjacent weights are detachably connected, and the two adjacent weights have a first connection state and a second connection state; when the two adjacent weights are in the first connection state, the two adjacent weights are relatively fixed in the vertical direction; when the two adjacent weights are in the second connection state, the two adjacent weights have a predetermined moving stroke for relative movement in the vertical direction, so that the two adjacent weights can move relative to each other in the vertical direction, and then in the process of each weight moving in the vertical direction, the weight is lifted.

[0075] In order to achieve the coordination between two adjacent weights, when the two adjacent weights are in the first connection state, the two adjacent weights are threadedly connected; each weight has a lifting state in which its gravity is separated from the exhaust pipe 104, and when each weight is in the lifting state, the threaded connection between the weight and its adjacent weight is in an unlocked state, so that the two adjacent weights are in the second connection state; when the weight and its adjacent weight are threadedly coordinated, the weight and its adjacent weight are fixed to each other in the vertical direction, that is, the two adjacent weights are in the first connection state.

[0076] Specifically, the multiple weights include a first weight 131 located at the bottom layer, and each weight located above the first weight 131 has a threaded fitting section 1371 and a smooth fitting section 1372 that are connected to each other, and each smooth fitting section 1372 is located above the corresponding threaded fitting section 1371; each weight is provided with a threaded fitting portion 1373 that matches with the threaded fitting section 1371 of the weight located above the weight, so that when each weight is in an initial state, the threaded fitting portion 1373 of the weight matches with the threaded fitting section 1371 of the weight located above the weight; when each weight is in a lifted state, the threaded fitting portion 1373 of the weight is located in the smooth fitting section 1372 of the weight above the weight.

[0077] Specifically, the pressure limiting structure 101 also includes a fixing plate 110, and the first weight 131 is arranged on the fixing plate 110; a positioning column 1312 is arranged on the first weight 131, and a positioning hole 112 is arranged on the fixing plate 110, and the positioning column 1312 is inserted into the positioning hole 112 to make the first weight 131 and the fixing plate 110 relatively fixed.

[0078] Specifically, the plurality of weights include a second weight 132 at the top, the blocking portion 1324 is disposed on the second weight 132, and the adjusting component 140 and the weights below the second weight 132 are limitedly matched to lift each weight below the second weight 132 one by one.

[0079] In order to achieve the limited cooperation between the adjusting component 140 and the weight located below the second weight 132, the adjusting component 140 includes a rotating disk 141, on which a positioning block 142 is provided, and the weight assembly 130 has a positioning groove 135, so that the cooperation relationship between the positioning block 142 and the positioning groove 135 can be adjusted by rotating the rotating disk 141 to lift or release at least some of the multiple weights.

[0080] Specifically, multiple micro-motion contact pieces 146 are arranged at intervals along the circumference of the rotating disk 141; during the rotation of the rotating disk 141, multiple micro-motion contact pieces 146 rotate synchronously with the rotating disk 141. When two adjacent micro-motion contact pieces 146 trigger the micro switch in sequence, the rotation position information of the rotating disk 141 can be determined based on the angle between the two adjacent micro-motion contact pieces 146, and then the state of each weight can be determined.

[0081] Specifically, the pressure limiting structure 101 further includes a fixing seat 161 , and the position detecting component 160 is disposed in the fixing seat 161 .

[0082] In order to realize the rotation of the rotating disk 141 , the adjusting component 140 further includes a rotating gear portion 143 . The rotating gear portion 143 is disposed on the rotating disk 141 , so as to drive the rotating disk 141 to rotate by pushing the rotating gear portion 143 .

[0083] In order to push the rotating gear portion 143 to rotate, the adjusting component 140 further includes a pushing component, so as to push the rotating gear portion 143 to rotate through the pushing component.

[0084] Specifically, one implementation of the push component is: Figures 17 to 20 As shown, the pushing assembly includes a sleeve portion 1441 and a locking portion 1442, wherein the sleeve portion 1441 is sleeved on the rotating disk 141, and the locking portion 1442 is disposed on the sleeve portion 1441, and at least a portion of the locking portion 1442 is telescopically disposed in the cavity of the sleeve portion 1441, and the locking portion 1442 is engaged with the rotating gear portion 143, so that when the sleeve portion 1441 rotates, the locking portion 1442 pushes the rotating disk 141 to rotate. Optionally, the locking portion 1442 is a block structure.

[0085] Specifically, the pushing assembly further includes a first elastic member 1443 and a mounting seat 1445, wherein the mounting seat 1445 is disposed on the sleeve portion 1441 so that the mounting seat 1445 is relatively fixed to the sleeve portion 1441; both ends of the first elastic member 1443 are respectively fixedly connected to the locking portion 1442 and the mounting seat 1445, so that under the elastic action of the first elastic member 1443, the locking portion 1442 can be extended and retracted relative to the mounting seat 1445 in the cavity of the sleeve portion 1441. Optionally, the first elastic member 1443 is a spring.

[0086] Specifically, the pushing assembly also includes a first transmission plate 1446 and a second transmission plate 1447. The first transmission plate 1446 is movably arranged along a first predetermined direction, and the second transmission plate 1447 is movably arranged on the first transmission plate 1446. The second transmission plate 1447 is used to be fixedly connected with the sleeve portion 1441, so that when the first transmission plate 1446 moves along the first predetermined direction, the first transmission plate 1446 pushes the second transmission plate 1447 and the sleeve portion 1441 to rotate, and the sleeve portion 1441 drives the locking portion 1442 to rotate, and the rotation of the locking portion 1442 drives the rotating disk 141 to rotate.

[0087] Optionally, the first transmission plate 1446 and the second transmission plate 1447 are both strip-shaped plates, one end of the second transmission plate 1447 is used for movably connecting with the first transmission plate 1446 , and the other end of the second transmission plate 1447 is used for connecting with the sleeve portion 1441 .

[0088] Specifically, the first transmission plate 1446 is provided with a first limiting column 1448, the second transmission plate 1447 has a limiting channel 1450, the first limiting column 1448 is inserted into the limiting channel 1450, and the outer wall surface of the first limiting column 1448 cooperates with the inner wall surface of the limiting channel 1450 to realize that when the first transmission plate 1446 moves along the first predetermined direction, the first transmission plate 1446 pushes the second transmission plate 1447 and the sleeve portion 1441 to rotate. In specific use, the outer wall surface of the first limiting column 1448 contacts the inner wall surface of the limiting channel 1450, and when the first transmission plate 1446 pushes the second transmission plate 1447 and the sleeve portion 1441 to rotate, the second transmission plate 1447 moves relative to the first limiting column 1448, so that the outer wall surface of the first limiting column 1448 slides in contact with the inner wall surface of the limiting channel 1450.

[0089] Optionally, the limiting channel 1450 is a strip-shaped hole, and the extension direction of the strip-shaped hole is the same as the extension direction of the second transmission plate 1447; the second transmission plate 1447 moves relative to the first limiting column 1448 along its extension direction.

[0090] Specifically, the first transmission plate 1446 is telescopically arranged so that the first transmission plate 1446 has its initial position and a maximum extension position, and the second transmission plate 1447 has its initial position and a maximum rotation position; the locking portion 1442 has its initial position and a maximum movement position relative to the mounting seat 1445, and when the locking portion 1442 is in its initial position, the first elastic member 1443 is in a free state; when the locking portion 1442 is in its maximum movement position, the first elastic member 1443 is compressed.

[0091] like Fig.19 As shown, when the first transmission plate 1446 is in its initial position, the second transmission plate 1447 is in its initial position, and the first limiting column 1448 is located in the limiting channel 1450 at the end close to the sleeve portion 1441; at this time, the locking portion 1442 is in its initial position, that is, the pushing surface of the locking portion 1442 abuts against the tooth surface of the rotating tooth portion 143, so that the pushing assembly is in its initial position.

[0092] When the first transmission plate 1446 is in its maximum extension position, the second transmission plate 1447 is in its maximum rotation position. At this time, the first limiting column 1448 is located in the limiting channel 1450 at the end away from the sleeve portion 1441; at this time, the locking portion 1442 is in its maximum movement position, and the locking portion 1442 is disengaged from the rotating tooth portion 143.

[0093] Specifically, a sliding slope is provided between two adjacent teeth of the rotating tooth portion 143 .

[0094] In the specific implementation process, Fig. 20As shown, when the first transmission plate 1446 moves from its initial position to its maximum extended position, since the outer wall surface of the first limiting column 1448 on the second transmission plate 1447 contacts the inner wall surface of the limiting channel 1450 of the first transmission plate 1446, and the second transmission plate 1447 is connected to the sleeve portion 1441, the first transmission plate 1446 pushes the second transmission plate 1447 and the sleeve portion 1441 to rotate, and the sleeve portion 1441 drives the mounting seat 1445 and the locking portion 1442 to rotate; since the pushing surface of the locking portion 1442 abuts against the tooth surface of the rotating tooth portion 143, the locking portion 1442 pushes the tooth body in contact with it to rotate , thereby pushing the rotating disk 141 to rotate; during this process, the first elastic member 1443 is gradually compressed, the locking portion 1442 pushes the rotating tooth portion 143 to rotate a certain angle, and the locking portion 1442 gradually disengages from the tooth body of the rotating tooth portion 143 with which it contacts, until it is completely disengaged from the rotating tooth portion 143; the second transmission plate 1447 moves relative to the first limiting column 1448, so that the outer wall surface of the first limiting column 1448 is in contact with the inner wall surface of the end of the limiting channel 1450 close to the sleeve portion 1441, and the contact is transformed into the outer wall surface of the first limiting column 1448 contacting the inner wall surface of the end of the limiting channel 1450 away from the sleeve portion 1441.

[0095] The moving direction of the first transmission plate 1446 when it moves from its initial position to its maximum extended position is the above-mentioned first predetermined direction.

[0096] When the first transmission plate 1446 moves from its maximum extension position to its initial position, the first transmission plate 1446 pushes the second transmission plate 1447 and the sleeve portion 1441 to rotate in the opposite direction to the previous direction, and the sleeve portion 1441 drives the mounting seat 1445 and the locking portion 1442 to rotate in the opposite direction to the previous direction; and because the locking portion 1442 is completely separated from the rotating tooth portion 143, and the first elastic member 1443 is compressed, the locking portion 1442 is close to the rotating tooth portion 143 and abuts against a sliding inclined surface of the rotating tooth portion 143 under the elastic force of the first elastic member 1443 and the force of the sleeve portion 1441, and the locking portion 1442 moves along the sliding inclined surface after abutting against the sliding inclined surface. The inclined surface slides until it slides to the end of the sliding inclined surface, and the pushing surface of the locking part 1442 contacts the tooth surface of the next tooth body at the end of the sliding inclined surface again, so that the locking part 1442 returns to its original position; during this process, the second transmission plate 1447 moves relative to the first limiting column 1448, so that the outer wall surface of the first limiting column 1448 contacts the inner wall surface of the end of the limiting channel 1450 away from the sleeve part 1441, and then the outer wall surface of the first limiting column 1448 contacts the inner wall surface of the end of the limiting channel 1450 close to the sleeve part 1441, so that the second transmission plate 1447 returns to its original position; at this time, the first transmission plate 1446 also returns to its original position.

[0097] The “next tooth body” mentioned above refers to a tooth body that is adjacent to the tooth body pushed by the locking portion 1442 in the direction opposite to the rotation direction of the rotating disk 141 .

[0098] The pushing assembly further includes a first driving component 1449, which is connected to the first transmission plate 1446 to drive the first transmission plate 1446 to perform telescopic movement. Optionally, the first driving component 1449 is a driving cylinder or a linear motor.

[0099] Specifically, another implementation method of the push component is: Figures 13 to 16 As shown, the pushing assembly includes a pawl portion 1451 , and the pawl portion 1451 cooperates with the rotating tooth portion 143 to drive the rotating disk 141 to rotate by driving the rotating tooth portion 143 to rotate.

[0100] The pushing assembly also includes a push plate 1452, which is movably arranged along a second predetermined direction, and the pawl portion 1451 is rotatably arranged on the push plate 1452, so that when the push plate 1452 moves along the second predetermined direction, the pawl portion 1451 rotates relative to the push plate 1452; and during the rotation of the pawl portion 1451, the pawl portion 1451 pushes the rotating disk 141 to rotate.

[0101] The pushing assembly further includes a second elastic member 1453, the two ends of which are respectively fixedly connected to the pawl portion 1451 and the push plate 1452; the second elastic member 1453 is compressed during the rotation of the pawl portion 1451 relative to the push plate 1452. Optionally, the second elastic member 1453 is a spring.

[0102] Specifically, the push plate 1452 is telescopically arranged so that the push plate 1452 has its initial position and a maximum extended position, such as Fig.15 As shown, when the push plate 1452 is in its initial position, the pawl portion 1451 is also in its initial position relative to the push plate 1452, so that the pushing assembly is in its initial position; at this time, the second elastic member 1453 is in a free state, and the pushing surface of the pawl portion 1451 abuts against the tooth surface of the rotating tooth portion 143; when the push plate 1452 is in its maximum extended position, the pawl portion 1451 is also in its maximum movement position relative to the push plate 1452, at this time, the second elastic member 1453 is in a compressed state, and the pawl portion 1451 is disengaged from the rotating tooth portion 143.

[0103] Specifically, a sliding slope is provided between two adjacent teeth of the rotating tooth portion 143 .

[0104] In the specific implementation process, Fig.16As shown, when the push plate 1452 moves from its initial position to its maximum extended position, since the pawl portion 1451 abuts against the rotating tooth portion 143, the pawl portion 1451 rotates from its initial position to its maximum movement position. During this process, the second elastic member 1453 is gradually compressed, and the pawl portion 1451 pushes the rotating tooth portion 143 to rotate a certain angle, and the pawl portion 1451 gradually disengages from the tooth body of the rotating tooth portion 143 with which it contacts, until it is completely disengaged from the rotating tooth portion 143.

[0105] The moving direction of the push plate 1452 from its initial position to its maximum extended position is the second predetermined direction mentioned above.

[0106] When the push plate 1452 moves from its maximum extended position to its initial position, since the pawl portion 1451 is completely disengaged from the rotating tooth portion 143 and the second elastic member 1453 is compressed, the pawl portion 1451 approaches the rotating tooth portion 143 and abuts against a sliding inclined surface of the rotating tooth portion 143 under the elastic force of the second elastic member 1453 and the force of the push plate 1452. After abutting against the sliding inclined surface, the pawl portion 1451 slides along the sliding inclined surface until it slides to the end of the sliding inclined surface. The pushing surface of the pawl portion 1451 again contacts the tooth surface of the next tooth body at the end of the sliding inclined surface to restore the pawl portion 1451 to its initial position. At this time, the push plate 1452 also returns to its initial position.

[0107] The “next tooth” mentioned above refers to a tooth that is adjacent to the tooth that was previously pushed by the pawl portion 1451 and that is in the direction opposite to the rotation direction of the rotating disk 141 .

[0108] Specifically, a second limiting column 1454 is disposed on the push plate 1452 , and the pawl portion 1451 is rotatably sleeved on the second limiting column 1454 .

[0109] The pawl portion 1451 includes a first plate body and a second plate body that are connected to each other. The first plate body and the second plate body are set at a predetermined angle, which is greater than 90 degrees and less than 180 degrees; the free end face of the first plate body forms a pushing surface of the pawl portion 1451, and the end of the second plate body away from the first plate body is sleeved on the second limiting column 1454, and the second elastic member 1453 is connected at the connection between the first plate body and the second plate body.

[0110] The pushing assembly further includes a second driving component 1455, which is connected to the push plate 1452 to drive the push plate 1452 to perform telescopic movement. Optionally, the second driving component 1455 is a driving cylinder or a linear motor.

[0111] Now, exemplary embodiments according to the present application will be described in more detail with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in a variety of different forms and should not be interpreted as being limited to the embodiments described herein. It should be understood that these embodiments are provided to make the disclosure of the present application thorough and complete, and to fully convey the concepts of these exemplary embodiments to those of ordinary skill in the art. In the accompanying drawings, for clarity, the thickness of the layers and regions is enlarged, and the same reference numerals are used to represent the same devices, so their description will be omitted.

[0112] Embodiment 1

[0113] The pressure limiting structure provided in this embodiment is as follows Figures 1 to 5 As shown in the pressure limiting structure 101 , the weight assembly of the pressure limiting structure 101 in this embodiment is composed of a first weight 131 and a second weight 132 , forming a two-level pressure limiting structure.

[0114] In this embodiment, at least part of the first weight 131 is located below the second weight 132. The second weight 132 has a threaded fitting section 1371 and a smooth fitting section 1372 connected to each other, and the smooth fitting section 1372 of the second weight 132 is located above its threaded fitting section 1371; the first weight 131 is provided with a threaded fitting portion 1373 that matches with the threaded fitting section 1371 of the second weight 132, so that when both the first weight 131 and the second weight 132 are in the initial state, the threaded fitting portion 1373 of the first weight 131 matches with the threaded fitting section 1371 of the second weight 132, so that the first weight 131 and the second weight 132 are threadedly connected; when the first weight 131 is in its raised state, the threaded fitting portion 1373 of the first weight 131 is located in the smooth fitting section 1372 of the second weight 132.

[0115] In this embodiment, the threaded fitting section 1371 is a threaded hole section, the smooth fitting section 1372 is a smooth hole section, the threaded hole section and the smooth hole section of the second weight 132 are connected to each other; the threaded fitting portion 1373 is an external threaded portion.

[0116] Optionally, in order to ensure that the first weight 131 and the second weight 132 are in a combined state, the aperture of the threaded fitting section 1371 is smaller than the aperture of the smooth fitting section 1372; the threaded fitting portion 1373 is a flange portion provided on the corresponding weight.

[0117] Specifically, the fixing plate 110 is further provided with a relief hole 113 for making way for the exhaust pipe 104, the first weight 131 is provided with a first relief hole 1314 for making way for the exhaust pipe 104, and the second weight 132 is provided with a second relief hole 1325 for making way for the exhaust pipe 104, so that the exhaust pipe 104 is sequentially arranged in the relief hole 113, the first relief hole 1314 and the second relief hole 1325. Optionally, the second relief hole 1325 and the first relief hole 1314, and the first relief hole 1314 and the relief hole 113 are all connected.

[0118] Specifically, the inner wall of the second clearance hole 1325 is provided with an internal thread, and the outer wall of the exhaust pipe 104 is provided with an external thread, so that the exhaust pipe 104 and the second weight 132 are threadedly connected, thereby relatively fixing the exhaust pipe 104 and the second weight 132.

[0119] In this embodiment, the first weight 131 is limitedly matched with the adjusting component 140 , so that the first weight 131 is lifted through the cooperation between the first weight 131 and the adjusting component 140 .

[0120] Specifically, the blocking portion 1324 is located in the second evacuation hole 1325 .

[0121] In this embodiment, the rotating disk 141 is rotatably sleeved on the outer side of the first weight 131 , so that the rotating disk 141 rotates relative to the first weight 131 ; the second weight 132 is spaced apart from the adjusting component 140 .

[0122] Specifically, there is one positioning block 142, and there are multiple positioning grooves 135, and at least two positioning grooves 135 among the multiple positioning grooves 135 have a depth difference in the vertical direction, so that the height of at least some of the multiple weights can be raised by inserting the positioning block 142 into the corresponding positioning groove 135. That is, when the positioning block 142 rotates with the rotating disk 141, the positioning block 142 moves from the positioning groove 135 with a deeper depth to the positioning groove 135 with a shallower depth to raise the height of at least some of the multiple weights; the positioning block 142 then moves from the positioning groove 135 with a shallower depth to the positioning groove 135 with a deeper depth to release at least some of the multiple weights.

[0123] Alternatively, there are multiple positioning blocks 142 and positioning grooves 135, and the multiple positioning blocks 142 and the multiple positioning grooves 135 are arranged along the circumference of the rotating disk 141; at least two positioning blocks 142 among the multiple positioning blocks 142 have a height difference in the vertical direction, and at least two positioning grooves among the multiple positioning grooves 135 have a depth difference in the vertical direction, so that the height of at least part of the multiple weights can be raised by inserting each positioning block 142 into the corresponding positioning groove 135. In the specific implementation process, when the positioning blocks 142 rotate with the rotating disk 141, the positioning blocks 142 with higher height among the multiple positioning blocks 142 move from the corresponding positioning groove 135 with deeper depth to the corresponding positioning groove 135 with shallower depth to raise the height of at least part of the multiple weights; the positioning blocks 142 with higher height among the multiple positioning blocks 142 then move from the corresponding positioning groove 135 with shallower depth to the corresponding positioning groove 135 with deeper depth to release at least part of the multiple weights.

[0124] Specifically, the positioning groove 135 is a strip-shaped groove, and the top wall of the positioning groove 135 gradually extends in the vertical direction along the rotation direction of the rotating disk 141; the positioning block 142 is inserted in the positioning groove 135, so that when the rotating disk 141 rotates, at least part of the multiple weights can be lifted or released through the cooperation between the top wall of the positioning block 142 and the top wall of the positioning groove 135. That is, the top wall of the positioning block 142 contacts the top wall of the corresponding positioning groove 135 to achieve the lifting or release of at least part of the multiple weights.

[0125] In this embodiment, a first positioning block 1421 is disposed on the disk surface of the rotating disk 141 , a first positioning groove 1351 is disposed on the first weight 131 , and the rotating disk 141 has an initial position and a first working position.

[0126] During the specific implementation process, when the rotating disk 141 is located at the initial position, the first weight 131 and the second weight 132 are in a mutually locked state, and the first positioning block 1421 is located in the first positioning groove 1351, so that the first weight 131 and the second weight 132 are simultaneously in the initial state of applying their gravity to the exhaust pipe 104; when the rotating disk 141 is in the first working position, the first weight 131 and the second weight 132 are in a mutually unlocked state, and the first positioning block 1421 is moved out of the first positioning groove 1351 to lift the first weight 131, so that the first weight 131 is in a lifted state in which its gravity is separated from the exhaust pipe 104.

[0127] Specifically, when the rotating disk 141 is located at the initial position, the first weight 131 and the second weight 132 are threadedly connected; when the rotating disk 141 is located at the first working position, the threaded connection between the first weight 131 and the second weight 132 is in an unlocked state.

[0128] In this embodiment, a second positioning groove 1352 is provided on the first weight 131 , and the depth of the second positioning groove 1352 is smaller than the depth of the first positioning groove 1351 ; when the rotating disk 141 is in the first working position, the first positioning block 1421 is clamped in the second positioning groove 1352 .

[0129] In this embodiment, a second positioning block 1422 is provided on the disk surface of the rotating disk 141 , and the second positioning block 1422 cooperates with the second positioning groove 1352 ; when the rotating disk 141 is in the initial position, the second positioning block 1422 is clamped in the second positioning groove 1352 .

[0130] A first positioning groove group is arranged on the first weight 131, and the first positioning groove group includes a pair of first positioning grooves 1351 and a second positioning groove 1352, and the pair of first positioning grooves 1351 and the second positioning grooves 1352 are arranged at intervals along the circumference of the first weight 131; a first positioning block group is arranged on the rotating disk 141, and the first positioning block group includes a pair of first positioning blocks 1421 and a second positioning block 1422, and the pair of first positioning blocks 1421 and the second positioning blocks 1422 are arranged at intervals along the circumference of the rotating disk 141.

[0131] Optionally, a plurality of first positioning groove groups are provided on the first weight 131, and the plurality of first positioning groove groups are arranged at intervals along the circumference of the first weight 131; and a group of first positioning block groups are provided on the rotating disk 141. The first positioning block 1421 is located in a first positioning groove 1351 of one of the plurality of first positioning groove groups, and the second positioning block 1422 is located in a second positioning groove 1352 of the first positioning groove group, so that the first weight 131 is in an initial state where its gravity acts on the exhaust pipe 104.

[0132] When it is necessary to lift the first weight 131, firstly, the first weight 131 or the second weight 132 is screwed to unlock the threaded connection between the first weight 131 and the second weight 132. Even if the first weight 131 enters the smooth mating section 1372 of the second weight 132, after the first weight 131 enters the smooth mating section 1372 of the second weight 132, the first weight 131, under the action of its own gravity, the lower flange of the threaded mating portion 1373 of the first weight 131 will be stuck on the upper flange of the threaded mating section 1371 of the second weight 132, so that the first weight 131 is hung on the second weight 132. Therefore, the gravity of the first weight 131 continues to be pressed on the exhaust pipe 104 through the second weight 132.

[0133] Then rotate the rotating disk 141 to make it rotate relative to the first weight 131. During the rotation of the rotating disk 141 relative to the first weight 131, the first positioning block 1421 and the second positioning block 1422 both rotate with the rotating disk 141. When the first positioning block 1421 moves to the second positioning slot 1352 of the first positioning slot group, the first positioning block 1421 is inserted in the second positioning slot 1352 to lift the first weight 131 so that the first weight 131 is in its lifted state; the second positioning block 1422 moves to the first positioning slot 1351 of the first positioning slot group adjacent to the first positioning slot group and is at least partially inserted in this first positioning slot 1351.

[0134] Continue to rotate the rotating disk 141 to move the first positioning block 1421 to the first positioning slot 1351 of the first positioning slot group adjacent to the first positioning slot group and insert it into the first positioning slot 1351 to restore the first weight 131 to its initial state. At this time, the second positioning block 1422 moves to the second positioning slot 1352 of the first positioning slot group adjacent to the first positioning slot group and inserts it into the second positioning slot 1352.

[0135] Optionally, a plurality of first positioning groove groups are provided on the first weight 131, and the plurality of first positioning groove groups are arranged at intervals along the circumference of the first weight 131; a plurality of first positioning block groups are provided on the rotating disk 141, and the plurality of first positioning block groups are provided in one-to-one correspondence with the plurality of first positioning groove groups, and the first positioning blocks 1421 and the second positioning blocks 1422 in each first positioning block group are inserted in one-to-one correspondence into the first positioning grooves 1351 and the second positioning grooves 1352 of the corresponding first positioning groove groups, so that the first weight 131 is in its initial state, and at this time, the rotating disk 141 is in its initial position.

[0136] When it is necessary to lift the first weight 131, firstly, the first weight 131 or the second positioning groove 1352 is screwed to unlock the threaded connection between the first weight 131 and the second weight 132, that is, the first weight 131 enters the smooth matching section 1372 of the second weight 132; then the rotating disk 141 is rotated to make it rotate relative to the first weight 131. During the rotation of the rotating disk 141 relative to the first weight 131, when each first positioning block 1421 moves into the second positioning groove 1352 of its corresponding first positioning groove group and lifts up the first weight 131, the first weight 131 is in its lifting state; at this time, each second positioning block 1422 moves into the first positioning groove 1351 of the first positioning groove group adjacent to its corresponding first positioning groove group, so that the rotating disk 141 is in its first working position.

[0137] Continue to rotate the rotating disk 141 to move each first positioning block 1421 into the first positioning slot 1351 of the first positioning slot group adjacent to its corresponding first positioning slot group, so that the first weight 131 returns to its initial state. At this time, each second positioning block 1422 moves into the second positioning slot 1352 of the first positioning slot group adjacent to its corresponding first positioning slot group.

[0138] In this embodiment, the first positioning block 1421 and the second positioning block 1422 are both conical structures, and the cross-sectional areas of the first positioning block 1421 and the second positioning block 1422 gradually decrease in the direction away from the rotating disk 141, so as to facilitate the first positioning block 1421 and the second positioning block 1422 to move out of the first positioning groove 1351 and the second positioning groove 1352 respectively; wherein, the cross-sectional areas of the first positioning block 1421 and the second positioning block 1422 both refer to the area of ​​the cross section perpendicular to the center direction of the rotating disk 141.

[0139] By using the pressure limiting structure 101 in this embodiment, two-level pressure limiting can be achieved.

[0140] This embodiment further provides a pressure cooker, which includes an exhaust pipe 104 and the above-mentioned pressure limiting structure 101 . The pressure limiting structure 102 is arranged on the exhaust pipe 104 .

[0141] Embodiment 2

[0142] The pressure limiting structure 102 provided in this embodiment has a weight assembly composed of a first weight 131, a second weight 132 and a third weight 133, forming a three-level pressure limiting structure. The difference between the pressure limiting structure 102 in the second embodiment and the pressure limiting structure 101 in the first embodiment is as follows:

[0143] Please refer to Figures 6 to 12 The third weight 133 is arranged between the first weight 131 and the second weight 132; a third positioning block 1423 is arranged on the disk surface of the rotating disk 141, and the third positioning block 1423 is arranged on the outer side of the first positioning block 1421. The third weight 133 is provided with a third positioning groove 1353, and the third positioning groove 1353 extends along the circumference of the third weight 133.

[0144] During the specific implementation process, the rotating disk 141 also includes a second working position, and the initial position, the first working position and the second working position are arranged in sequence along the rotation direction of the rotating disk 141; wherein, when the rotating disk 141 is located at the initial position and the first working position, the third weight 133 and the second weight 132 are in a mutually locked state, and the third positioning block 142 is located in the third positioning groove 1353, so that the third weight 133 is in an initial state of applying its gravity to the exhaust pipe 104; when the rotating disk 141 moves to the second working position, the third weight 133 and the second weight 132 are in a mutually unlocked state, and the third positioning block 142 is moved out of the third positioning groove 1353 to lift the third weight 133.

[0145] Specifically, a fourth positioning groove 1354 is further provided on the first weight 131 , and the depth of the fourth positioning groove 1354 is smaller than the depth of the first positioning groove 1351 ; when the rotating disk 141 is in the second working position, the first positioning block 1421 is clamped in the fourth positioning groove 1354 .

[0146] Specifically, the rotating disk 141 is provided with a fourth positioning block 1424, which cooperates with the fourth positioning slot 1354; when the rotating disk 141 is in the initial position, the fourth positioning block 1424 is located in the fourth positioning slot 1354. Optionally, the height of the fourth positioning block 1424 is the same as that of the second positioning block 1422.

[0147] During the specific implementation process, when the rotating disk 141 is located at the initial position, the second weight 132 is threadedly connected with the third weight 133 so that the third weight 133 and the second weight 132 are relatively fixed, so that the third weight 133 is pressed on the exhaust pipe 104 by the weight of the second weight 132; the first weight 131 is threadedly connected with the third weight 133 so that the first weight 131 and the third weight 133 are relatively fixed, so that the first weight 131 is pressed on the exhaust pipe 104 by the weight of the third weight 133 and the second weight 132.

[0148] When the rotating disk 141 is in the first working position, the threaded connection between the first weight 131 and the third weight 133 is in an unlocked state, and the second weight 132 and the third weight 133 are threadedly connected; when the rotating disk 141 is in the second working position, the threaded connection between the first weight 131 and the third weight 133 is in an unlocked state, and the threaded connection between the second weight 132 and the third weight 133 is in an unlocked state.

[0149] In this embodiment, the second weight 132 is sleeved on the third weight 133, and the third weight 133 is sleeved on the first weight 131; the second weight 132 has a threaded mating section 1371 and a smooth mating section 1372 that are interconnected, the smooth mating section 1372 of the second weight 132 is located above its threaded mating section 1371, and the third weight 133 is provided with a threaded mating portion 1373 for mating with the threaded mating section 1371 of the second weight 132; the third weight 133 also has a threaded mating section 1371 and a smooth mating section 1372 that are interconnected, the smooth mating section 1372 of the third weight 133 is located above its threaded mating section 1371, and the first weight 131 is provided with a threaded mating portion 1373 for mating with the threaded mating section 1371 of the third weight 133.

[0150] In this embodiment, the threaded fitting section 1371 of the second weight 132 is a threaded hole section, the smooth fitting section 1372 of the second weight 132 is a smooth hole section, the threaded hole section and the smooth hole section of the second weight 132 are connected to each other, and the threaded fitting portion 1373 of the third weight 133 is an external threaded portion; the threaded fitting section 1371 of the third weight 133 is a threaded rod section, the smooth fitting section 1372 of the third weight 133 is a smooth rod section, and the threaded fitting portion 1373 of the first weight 131 is an internal threaded portion.

[0151] Optionally, in order to ensure that the third weight 133 and the second weight 132 are in a combined state, the aperture of the threaded mating section 1371 of the second weight 132 is smaller than the aperture of its smooth mating section 1372 , and the threaded mating portion 1373 of the third weight 133 is a flange portion arranged on the third weight 133 .

[0152] Optionally, in order to ensure that the first weight 131 and the third weight 133 are in a combined state, the threaded fitting section 1371 of the third weight 133 is a flange portion provided on the third weight 133 .

[0153] Specifically, the third weight 133 has a third limiting rod 1331, and the threaded matching section 1371 and the smooth matching section 1372 of the third weight 133 are both located on the third limiting rod 1331. The threaded matching portion 1373 of the first weight 131 is located in the first clearance hole 1314, so that when the threaded matching portion 1373 of the first weight 131 is matched with the threaded matching section 1371 of the third weight 133, at least a portion of the third limiting rod 1331 is inserted into the first clearance hole 1314.

[0154] Specifically, the third weight 133 has a third clearance hole 1332, and the third clearance hole 1332 is located on the third limiting rod 1331, so that the exhaust pipe 104 is sequentially arranged in the avoidance hole 113, the first clearance hole 1314, the third clearance hole 1332 and the second clearance hole 1325. Optionally, the second clearance hole 1325 and the third clearance hole 1332, the third clearance hole 1332 and the first clearance hole 1314, and the first clearance hole 1314 and the avoidance hole 113 are all connected.

[0155] A second positioning groove group is arranged on the first weight 131, and the second positioning groove group includes a first positioning groove 1351, a second positioning groove 1352, and a fourth positioning groove 1354 which are arranged in sequence and at intervals along the circumference of the first weight 131; a second positioning block group is arranged on the rotating disk 141, and the second positioning block group includes a first positioning block 1421, a second positioning block 1422, and a fourth positioning block 1424 which are arranged in sequence and at intervals along the circumference of the rotating disk 141.

[0156] Optionally, a plurality of second positioning groove groups are provided on the first weight 131, and the plurality of second positioning groove groups are arranged at intervals along the circumference of the first weight 131; a group of second positioning block groups and a third positioning block 1423 are provided on the rotating disk 141; a plurality of third positioning grooves 1353 are provided on the third weight 133, and the plurality of third positioning grooves 1353 are arranged at intervals along the circumference of the third weight 133.

[0157] When the rotating disk 141 is in its initial position, the first positioning block 1421 is located in the first positioning slot 1351 of one of the multiple second positioning slot groups, the second positioning block 1422 is located in the second positioning slot 1352 of the second positioning slot group, and the fourth positioning block 1424 is located in the fourth positioning slot 1354 of the second positioning slot group, so that the first weight 131 is in its initial state; the third positioning block 1423 is located in one of the multiple third positioning slots 1353, so that the first weight 131, so that the third weight 133 is in the initial state of applying its gravity to the exhaust pipe 104.

[0158] When it is necessary to lift the first weight 131, firstly, the first weight 131 or the third weight 133 is screwed to unlock the threaded connection between the first weight 131 and the third weight 133, even if the first weight 131 is in the smooth mating section 1372 of the third weight 133, after the first weight 131 is in the smooth mating section 1372 of the second weight 132, the first weight 131, under the action of its own gravity, the lower flange of the threaded mating part 1373 of the first weight 131 will be stuck on the upper flange of the threaded mating section 1371 of the third weight 133, so that the first weight 131 is hung on the third weight 133, so that the gravity of the first weight 131 continues to be pressed on the exhaust pipe 104 through the third weight 133 and the second weight 132.

[0159] Then rotate the rotating disk 141 to make it rotate relative to the first weight 131. During the rotation of the rotating disk 141 relative to the first weight 131, the first positioning block 1421, the second positioning block 1422, the third positioning block 1423 and the fourth positioning block 1424 all rotate with the rotating disk 141. When the rotating disk 141 rotates relative to the first weight 131 and rotates to its first working position, the first positioning block 1421 moves to the second positioning groove 1352 of the second positioning groove group, and the first positioning block 1421 is inserted into the second positioning groove 1352 to lift the first weight 131, so that the first The weight 131 is in its raised state; the second positioning block 1422 moves to the fourth positioning slot 1354 of the second positioning slot group and is at least partially inserted in the fourth positioning slot 1354, and the fourth positioning block 1424 moves to the first positioning slot 1351 of the second positioning slot group adjacent to the second positioning slot group and is at least partially inserted in this first positioning slot 1351; during this rotation process, the third positioning block 1423 moves in the third positioning slot 1353 in which it is located and remains in the third positioning slot 1353, so that the third weight 133 maintains its initial state.

[0160] When it is necessary to lift the third weight 133, firstly, the third weight 133 or the second weight 132 is screwed to unlock the threaded connection between the third weight 133 and the second weight 132. Even if the third weight 133 enters the smooth mating section 1372 of the second weight 132, after the third weight 133 enters the smooth mating section 1372 of the second weight 132, the third weight 133, under the action of its own gravity, the lower flange of the threaded mating portion 1373 of the third weight 133 will be stuck on the upper flange of the threaded mating section 1371 of the second weight 132, so that the third weight 133 is hung on the second weight 132. Therefore, the gravity of the third weight 133 continues to be pressed on the exhaust pipe 104 through the second weight 132.

[0161] When the rotating disk 141 is further rotated to rotate relative to the third weight 133 and the first weight 131, and the rotating disk 141 is rotated from its first working position to its second working position, the first positioning block 1421 moves to the fourth positioning slot 1354 of the second positioning slot group, and the first positioning block 1421 is inserted in the fourth positioning slot 1354 to maintain its lifting state for the first weight 131, and the second positioning block 1422 moves to the first positioning slot 1351 of the second positioning slot group adjacent to the second positioning slot group and is at least partially inserted therein. In this first positioning groove 1351, the fourth positioning block 1424 moves to the second positioning groove 1352 of the second positioning groove group adjacent to the second positioning groove group and is at least partially inserted into this second positioning groove 1352; during this rotation process, at least a portion of the third positioning block 1423 moves out from the third positioning groove 1353 in which it is located so that the third positioning block 1423 is located outside the third positioning groove 1353 and contacts the bottom wall of the third weight 133 to lift the third weight 133 so that the third weight 133 is in its lifted state.

[0162] Continue to rotate the rotating disk 141 to move the first positioning block 1421 to the first positioning slot 1351 of the second positioning slot group adjacent to the second positioning slot group and insert it into the first positioning slot 1351 to restore the first weight 131 to its initial state. At this time, the second positioning block 1422 moves to the second positioning slot 1352 of the second positioning slot group adjacent to the second positioning slot group and inserts it into the second positioning slot 1352. The fourth positioning block 1424 moves to the fourth positioning slot 1354 of the second positioning slot group adjacent to the second positioning slot group and inserts it into the fourth positioning slot 1354. The third positioning block 1423 moves to the third positioning slot 1353 adjacent to the third positioning slot 1353 and inserts it into the adjacent third positioning slot 1353 to restore the third weight 133 to its initial state.

[0163] Optionally, a plurality of second positioning groove groups are provided on the first weight 131, and the plurality of second positioning groove groups are arranged at intervals along the circumference of the first weight 131; a plurality of second positioning block groups and a plurality of third positioning blocks 1423 are provided on the rotating disk 141, and the plurality of third positioning blocks 1423 are arranged one-to-one on the outer sides of the first positioning blocks 1421 of the plurality of second positioning block groups; the plurality of second positioning block groups are provided one-to-one with the plurality of second positioning groove groups, and the first positioning block 1421, the second positioning block 1422, and the fourth positioning block 1424 in each second positioning block group are inserted one-to-one into the first positioning groove 1351, the second positioning groove 1352, and the fourth positioning groove 1354 of the corresponding second positioning groove group; a plurality of third positioning grooves 1353 are provided on the third weight 133, and the plurality of third positioning grooves 1353 are arranged at intervals along the circumference of the third weight 133, and the plurality of third positioning blocks 1423 are inserted one-to-one into the plurality of third positioning grooves 1353.

[0164] When the rotating disk 141 is in its initial position, as shown in FIG. Figure 6 As shown, Figure 6 A schematic diagram shows the state in which the rotating disk 141 of the pressure limiting structure 102 is in its initial position; each first positioning block 1421 is located in the first positioning slot 1351 of the corresponding second positioning slot group, each second positioning block 1422 is located in the second positioning slot 1352 of the corresponding second positioning slot group, and each fourth positioning block 1424 is located in the fourth positioning slot 1354 of the corresponding second positioning slot group, so that the first weight 131 is in its initial state; each third positioning block 1423 is located in the corresponding third positioning slot 1353, so that the third weight 133 is in its initial state.

[0165] When the first weight 131 needs to be lifted, the first weight 131 or the third weight 133 is firstly screwed to unlock the threaded connection between the first weight 131 and the third weight 133, that is, the first weight 131 is in the smooth matching section 1372 of the third weight 133; then the rotating disk 141 is rotated to rotate relative to the first weight 131. During the rotation of the rotating disk 141 relative to the first weight 131, when the rotating disk 141 rotates to its first working position, as shown in FIG. Fig.11 As shown, each first positioning block 1421 moves into the second positioning slot 1352 of its corresponding second positioning slot group to lift up the first weight 131, so that the first weight 131 is in a lifted state; each second positioning block 1422 moves into the fourth positioning slot 1354 of its corresponding second positioning slot group, and each fourth positioning block 1424 moves into the first positioning slot 1351 of the second positioning slot group adjacent to its corresponding second positioning slot group. During this rotation process, each third positioning block 1423 moves in the corresponding third positioning slot 1353 and remains in the corresponding third positioning slot 1353, so that the third weight 133 maintains its initial state.

[0166] When the third weight 133 needs to be lifted, the third weight 133 or the second weight 132 is firstly screwed to unlock the threaded connection between the third weight 133 and the second weight 132, that is, the third weight 133 enters the smooth matching section 1372 of the second weight 132; then the rotating disk 141 is continuously rotated to rotate relative to the third weight 133 and the first weight 131, and the rotating disk 141 is rotated from its first working position to its second working position. Fig.12 As shown, each first positioning block 1421 moves to the fourth positioning slot 1354 of its corresponding second positioning slot group to maintain the lifting state of the first weight 131, each second positioning block 1422 moves to the first positioning slot 1351 of the second positioning slot group adjacent to its corresponding second positioning slot group, and each fourth positioning block 1424 moves to the second positioning slot 1352 of the second positioning slot group adjacent to its corresponding second positioning slot group. During this rotation process, at least part of each third positioning block 1423 moves out of the corresponding third positioning slot 1353, so that each third positioning block 1423 is located on the outside of the corresponding third positioning slot 1353 and contacts the bottom wall of the third weight 133 to lift the third weight 133 so that the third weight 133 is in its lifting state.

[0167] Continue to rotate the rotating disk 141 to move each first positioning block 1421 into the first positioning slot 1351 of the second positioning slot group adjacent to its corresponding second positioning slot group, so that the first weight 131 recovers its initial state. At this time, the second positioning block 1422 moves into the second positioning slot 1352 of the second positioning slot group adjacent to its corresponding second positioning slot group, and the fourth positioning block 1424 moves into the fourth positioning slot 1354 of the second positioning slot group adjacent to its corresponding second positioning slot group; each third positioning block 1423 moves into the third positioning slot 1353 adjacent to its corresponding third positioning slot 1353, so that the third weight 133 recovers its second initial state.

[0168] In this embodiment, the first positioning block 1421, the second positioning block 1422, the third positioning block 1423 and the fourth positioning block 1424 are all conical structures. In the direction away from the rotating disk 141, the cross-sectional areas of the first positioning block 1421, the second positioning block 1422, the third positioning block 1423 and the fourth positioning block 1424 gradually decrease, so as to facilitate the first positioning block 1421, the second positioning block 1422, the third positioning block 1423 and the fourth positioning block 1424 to move out from the first positioning groove 1351, the second positioning groove 1352, the third positioning groove 1353 and the fourth positioning groove 1354 respectively; wherein, the cross-sectional areas of the first positioning block 1421, the second positioning block 1422, the third positioning block 1423 and the fourth positioning block 1424 all refer to the area of ​​the cross section perpendicular to the center direction of the rotating disk 141.

[0169] Using the pressure limiting structure 102 in this embodiment, three-level pressure limiting can be achieved.

[0170] By analogy, more levels of pressure limiting can be achieved by increasing the number of corresponding weights between the first weight 131 and the second weight 132, adding corresponding positioning blocks on the rotating disk 141, and adding corresponding positioning grooves on the first weight 131 and the added weights.

[0171] In this embodiment, there are three micro-movement contact pieces 146, and the three micro-movement contact pieces 146 are arranged at intervals along the circumference of the rotating disk 141, that is, the angle between two adjacent micro-movement contact pieces 146 is 120 degrees; the three micro-movement contact pieces 146 correspond to the three states of the rotating disk 141 respectively. When the first micro-movement contact piece 146 triggers the micro-switch, the rotating disk 141 is in its initial state. After the rotating disk 141 rotates 120 degrees from its initial position, the second micro-movement contact piece 146 triggers the micro-switch, and the rotating disk 141 is in its first working position. After the rotating disk 141 rotates 120 degrees from its first working position, the third micro-movement contact piece 146 triggers the micro-switch, and the rotating disk 141 is in its second working position.

[0172] This embodiment further provides a pressure cooker, which includes an exhaust pipe 104 and the above-mentioned pressure limiting structure 102 , and the pressure limiting structure 102 is arranged on the exhaust pipe 104 .

[0173] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0174] In the pressure limiting structure of the present invention, the pressure limiting structure includes a weight assembly 130 and an adjusting component 140. The blocking portion 1324 of the weight assembly 130 is used to be inserted into the pipe opening of the exhaust pipe 104 to form a blocking effect on the exhaust pipe 104. The weight assembly 130 includes a plurality of weights, and the plurality of weights are stacked in sequence in the vertical direction to play a pressure limiting role through the plurality of weights. The adjusting component 140 is in transmission cooperation with at least some of the plurality of weights, that is, through the cooperation between the adjusting component 140 and at least some of the plurality of weights , it is possible to lift at least some of the multiple weights, and then adjust the number of weights pressed on the exhaust pipe 104 by lifting at least some of the multiple weights, that is, to achieve multi-level pressure limiting by adjusting the number of weights pressed on the exhaust pipe 104; the pressure limiting structure is applied to the pressure cooker to limit the pressure of the pressure cooker, thereby achieving multi-level pressure limiting of the pressure cooker, so as to achieve multi-level pressure protection and multiple cooking effects of the pressure cooker, thereby solving the problem that the pressure limiting method of the pressure cooker in the prior art cannot achieve multi-level pressure limiting.

[0175] In addition, the pressure limiting structure also includes a position detection component 160, which is arranged on one side of the adjusting component 140 to detect the position of the adjusting component 140, and then determine the matching state between the adjusting component 140 and at least part of the multiple weights through the detected position information of the adjusting component 140, thereby determining the number of weights pressed on the fixed plate 110.

[0176] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0177] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0178] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein, for example. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0179] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pressure limiting structure, characterized in that: include: A weight assembly (130), the weight assembly (130) having a blocking portion (1324) for being inserted into the pipe opening of the exhaust pipe (104); the weight assembly (130) comprises a plurality of weights, the plurality of weights being stacked in sequence in a vertical direction; an adjusting component (140), the adjusting component (140) being in transmission cooperation with at least some of the plurality of weights, so as to adjust the number of weights pressed on the exhaust pipe (104) by lifting at least some of the plurality of weights; a position detection component (160), the position detection component (160) being arranged on one side of the adjustment component (140) to detect the position of the adjustment component (140); The adjusting component (140) is provided with a micro-movement contact piece (146), and the position detecting component (160) is a micro-movement switch, so that the micro-movement contact piece (146) triggers the micro-movement switch; The adjusting component (140) comprises: a rotating disk (141), a positioning block (142) is arranged on the rotating disk (141), and the weight assembly (130) has a positioning groove (135), so that the matching relationship between the positioning block (142) and the positioning groove (135) can be adjusted by rotating the rotating disk (141) to lift or release at least part of the multiple weights; A plurality of the micro-movement contact pieces (146) are arranged at intervals along the circumference of the rotating disk (141).

2. The pressure limiting structure according to claim 1, characterized in that: There are a plurality of micro-movement contact pieces (146), and the plurality of micro-movement contact pieces (146) are arranged at intervals along the movement direction of the adjustment component (140).

3. The pressure limiting structure according to claim 1, characterized in that: The two adjacent weights are detachably connected, and have a first connection state and a second connection state; when the two adjacent weights are in the first connection state, the two adjacent weights are relatively fixed in the vertical direction; when the two adjacent weights are in the second connection state, the two adjacent weights have a predetermined movement stroke for relative movement in the vertical direction.

4. The pressure limiting structure according to claim 3, characterized in that: When two adjacent weights are in the first connection state, the two adjacent weights are threadedly connected to each other; each weight has a lifting state in which its weight is separated from the exhaust pipe (104), and when each weight is in the lifting state, the threaded connection between the weight and its adjacent weight is in an unlocked state.

5. The pressure limiting structure according to claim 4, characterized in that: The plurality of weights include a first weight (131) located at the bottom layer, and each weight located above the first weight (131) has a threaded fitting section (1371) and a smooth fitting section (1372) connected to each other, and each smooth fitting section (1372) is located above the corresponding threaded fitting section (1371); Each of the weights is provided with a threaded mating portion (1373) that is mating with a threaded mating section (1371) of the weight located above the weight; when each of the weights is in an initial state, the threaded mating portion (1373) of the weight is mating with the threaded mating section (1371) of the weight above the weight; when each of the weights is in the lifted state, the threaded mating portion (1373) of the weight is located within the smooth mating section (1372) of the weight above the weight.

6. The pressure limiting structure according to claim 1, characterized in that: The multiple weights include a second weight (132) located at the top layer, and the blocking portion (1324) is arranged on the second weight (132); the adjusting component (140) and the weights located below the second weight (132) are both limitedly matched to lift each of the weights located below the second weight (132) one by one.

7. The pressure limiting structure according to claim 1, characterized in that: There is one positioning block (142), there are multiple positioning grooves (135), and at least two positioning grooves (135) among the multiple positioning grooves (135) have a depth difference along the vertical direction, so that the height of at least part of the multiple weights can be raised by inserting the positioning block (142) into the corresponding positioning groove (135); or There are multiple positioning blocks (142) and multiple positioning grooves (135), and the multiple positioning blocks (142) and the multiple positioning grooves (135) are arranged along the circumference of the rotating disk (141); at least two positioning blocks (142) among the multiple positioning blocks (142) have a height difference in the vertical direction, and at least two positioning grooves among the multiple positioning grooves (135) have a depth difference in the vertical direction, so that the height of at least part of the multiple weights can be raised by inserting each positioning block (142) into the corresponding positioning groove (135).

8. The pressure limiting structure according to claim 7, characterized in that: The positioning groove (135) is a strip-shaped groove, and along the rotation direction of the rotating disk (141), the top wall of the positioning groove (135) gradually extends in the vertical direction; the positioning block (142) is inserted into the positioning groove (135), so that when the rotating disk (141) rotates, at least part of the multiple weights can be lifted or released through the cooperation between the top wall of the positioning block (142) and the top wall of the positioning groove (135).

9. The pressure limiting structure according to claim 1, characterized in that: The adjusting component (140) further comprises: A rotating tooth portion (143), wherein the rotating tooth portion (143) is arranged on the rotating disk (141) so as to drive the rotating disk (141) to rotate by pushing the rotating tooth portion (143).

10. The pressure limiting structure according to claim 9, characterized in that: The adjusting component (140) further comprises: a sleeve portion (1441) and a locking portion (1442), wherein the sleeve portion (1441) is sleeved on the rotating disk (141), the locking portion (1442) is arranged on the sleeve portion (1441), at least a portion of the locking portion (1442) is telescopically arranged in a cavity of the sleeve portion (1441), and the locking portion (1442) is engaged with the rotating tooth portion (143) so as to push the rotating disk (141) to rotate through the locking portion (1442) when the sleeve portion (1441) rotates; or A ratchet portion (1451), wherein the ratchet portion (1451) cooperates with the rotating tooth portion (143) to drive the rotating tooth portion (143) to rotate, thereby driving the rotating disk (141) to rotate.

11. The pressure limiting structure according to claim 1, characterized in that: The plurality of weights include: A second weight (132), wherein the blocking portion (1324) is disposed on the second weight (132); a first weight (131), wherein at least a portion of the first weight (131) is located below the second weight (132); A rotating disk (141), wherein a first positioning block (1421) is arranged on a disk surface of the rotating disk (141), a first positioning groove (1351) is arranged on the first weight (131), and the rotating disk (141) has an initial position and a first working position; Wherein, when the rotating disk (141) is located at the initial position, the first weight (131) and the second weight (132) are in a mutually locked state, and the first positioning block (1421) is located in the first positioning groove (1351), so that the first weight (131) and the second weight (132) are simultaneously in an initial state in which their weight acts on the exhaust pipe (104); When the rotating disk (141) is in the first working position, the first weight (131) and the second weight (132) are in a mutually unlocked state, and the first positioning block (1421) is moved out of the first positioning groove (1351) to lift the first weight (131), so that the first weight (131) is in a lifted state in which its weight is separated from the exhaust pipe (104).

12. The pressure limiting structure according to claim 11, characterized in that: When the rotating disk (141) is located at the initial position, the first weight (131) and the second weight (132) are threadedly connected; when the rotating disk (141) is located at the first working position, the threaded connection between the first weight (131) and the second weight (132) is in an unlocked state.

13. The pressure limiting structure according to claim 11, characterized in that: The first weight (131) is provided with a second positioning groove (1352), the depth of the second positioning groove (1352) being smaller than the depth of the first positioning groove (1351); when the rotating disk (141) is in the first working position, the first positioning block (1421) is clamped in the second positioning groove (1352).

14. According to the pressure limiting structure of claim 13, a second positioning block (1422) is provided on the disk surface of the rotating disk (141), and the second positioning block (1422) cooperates with the second positioning groove (1352); when the rotating disk (141) is in the initial position, the second positioning block (1422) is clamped in the second positioning groove (1352).

15. The pressure limiting structure according to claim 11, characterized in that: The plurality of weights also include: a third weight (133), the third weight (133) being disposed between the first weight (131) and the second weight (132); A third positioning block (142) is arranged on the disk surface of the rotating disk (141), and the third positioning block (142) is arranged on the outer side of the first positioning block (1421); a third positioning groove (1353) is arranged on the third weight (133), and the third positioning groove (1353) extends along the circumference of the third weight (133); the rotating disk (141) also includes a second working position, and the initial position, the first working position and the second working position are arranged in sequence along the rotation direction of the rotating disk (141); Wherein, when the rotating disk (141) is located at the initial position and the first working position, the third weight (133) and the second weight (132) are in a mutually locked state, and the third positioning block (142) is located in the third positioning groove (1353), so that the third weight (133) is in an initial state of applying its gravity to the exhaust pipe (104); when the rotating disk (141) moves to the second working position, the third weight (133) and the second weight (132) are in a mutually unlocked state, and the third positioning block (142) is moved out of the third positioning groove (1353) to lift the third weight (133).

16. The pressure limiting structure according to claim 15, characterized in that: A fourth positioning groove (1354) is provided on the first weight (131), and the depth of the fourth positioning groove (1354) is smaller than the depth of the first positioning groove (1351); when the rotating disk (141) is in the second working position, the first positioning block (1421) is clamped in the fourth positioning groove (1354).

17. The pressure limiting structure according to claim 16, characterized in that: The rotating disk (141) is provided with a fourth positioning block (1424), and the fourth positioning block (1424) cooperates with the fourth positioning groove (1354); when the rotating disk (141) is in the initial position, the fourth positioning block (1424) is located in the fourth positioning groove (1354).

18. The pressure limiting structure according to claim 15, characterized in that: When the rotating disk (141) is located at the initial position, the first weight (131) is threadedly connected to the third weight (133), and the second weight (132) is threadedly connected to the third weight (133); when the rotating disk (141) is at the first working position, the threaded connection between the first weight (131) and the third weight (133) is in an unlocked state, and the second weight (132) is threadedly connected to the third weight (133); when the rotating disk (141) is at the second working position, the threaded connection between the first weight (131) and the third weight (133) is in an unlocked state, and the threaded connection between the second weight (132) and the third weight (133) is in an unlocked state.

19. The pressure limiting structure according to claim 1, characterized in that: The pressure limiting structure also includes: A fixing plate (110), wherein the fixing plate (110) is provided with a positioning hole (112) and an avoidance hole (113) for avoiding the exhaust pipe (104); The plurality of weights include a first weight (131) located at the bottom layer, and the first weight (131) is provided with a positioning column (1312) for being inserted into the positioning hole (112).

20. A pressure cooker, comprising an exhaust pipe (104) and a pressure limiting structure for applying gravity pressure to the exhaust pipe (104), characterized in that: The pressure limiting structure is the pressure limiting structure according to any one of claims 1 to 18.

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