Full-mechanical anti-dry-burning adjustable self-closing gas valve

Abstract

The invention relates to the technical field of gas valves, and discloses a full-mechanical anti-dry-burning adjustable self-closing gas valve which comprises a bearing sliding frame, a base and a gravity control valve arranged between the bearing sliding frame and the base, a gas pipe is connected to the bottom of the gravity control valve, a gas outlet is formed in the top of the gravity control valve, and a gas outlet is formed in the bottom of the gravity control valve. A valve element assembly is arranged in the gravity control valve, the gravity control valve comprises a first valve body part and a second valve body part, the first valve body part is in sliding fit with the second valve body part, the first valve body part is fixed to the bearing sliding frame, and the second valve body part is fixed to the bearing sliding frame. The anti-dry-burning function is achieved through the bearing sliding frame, the base and the gravity control valve arranged between the bearing sliding frame and the base, when water in the pot is reduced to a certain degree, the overall weight of the pot is reduced, and therefore the bearing sliding frame moves upwards under the elastic force of the spring, the lock is triggered to be unlocked, the valve is closed instantly, dry burning is prevented, and the service life of the pot is prolonged. The whole device adopts a full-mechanical structure to realize dry burning prevention, and the performance is more stable.

Description

Technical Field

[0001] The invention relates to the technical field of gas valves, and in particular to a fully mechanical anti-burn-dry adjustable self-closing gas valve. Background Art

[0002] In daily life, when using gas to boil water or make soup, due to the long time, basically no one will stay at the stove all the time, especially when making soup, which takes even longer. Many people will choose to leave and do other things while the soup is making. This can easily lead to the water in the pot being burned dry while the soup is making, causing the pot to be dry-burned, which not only wastes a pot of ingredients, but also easily burns the pot. In more serious cases, it may cause a fire. At present, most stoves do not have an anti-dry-burn function and cannot avoid the occurrence of dry-burning. Some stoves with an anti-dry-burn function mostly use sensors to achieve anti-dry-burning, and the kitchen is not only hot but also humid, which can easily cause the sensor to fail or even be damaged.

[0003] At present, most of the anti-dry-burning gas valves control the gas cut-off by detecting the temperature of the bottom of the pot through a temperature sensor. However, when there is water in the pot, the temperature change of the bottom of the pot is not obvious. Only when there is little water in the pot or the water in the pot is boiled dry will the temperature change be more obvious. In this state, the food in the pot is mostly burnt, and the use effect is not ideal. Summary of the invention

[0004] The present invention aims to provide a fully mechanical dry burning prevention adjustable self-closing gas valve to solve the problem that the existing gas valve cannot prevent dry burning or the dry burning prevention effect is poor.

[0005] The present invention is achieved through the following technical solutions:

[0006] A fully mechanical anti-burn-dry adjustable self-closing gas valve, comprising a load-bearing slide, a base and a gravity control valve arranged between the load-bearing slide and the base, the gravity control valve comprising a valve core assembly and a valve body assembly, the valve body assembly comprising a valve core control portion at an upper end and an air inlet and outlet connecting portion at a lower end, the valve core control portion being used to control the up and down movement of the valve core assembly, an air inlet being provided at the lower end position of the air inlet and outlet connecting portion, an air outlet being provided at the upper end position of the air inlet and outlet connecting portion, a valve passageway being provided between the air inlet and the air outlet, the valve core assembly being used to open and close the valve passageway, thereby controlling the connection and disconnection between the air inlet and the air outlet, the valve core control portion comprising A first valve body and a second valve body, the first valve body and the second valve body are slidably matched, the first valve body is fixed on the load-bearing slide, the second valve body is fixed to the inlet and outlet connecting part, the inlet and outlet connecting part is fixed on the base, the valve core assembly includes a core shaft, one end of the core shaft is fixed on the load-bearing slide, and the other end of the core shaft is fixed with a sealing plug, a one-way valve structure is formed by the cooperation between the sealing plug and the valve channel, a return spring assembly and an elastic force adjustment assembly for adjusting the rebound force are provided between the first valve body and the second valve body, and the first valve body and the second valve body are also connected by a trigger lock assembly.

[0007] In a possible design, a sealing ring is fixedly provided at the top end of the air inlet and outlet connecting portion, and the sealing ring is in contact with the core shaft. The sealing ring can seal the matching gap between the top end of the air inlet and outlet connecting portion and the core shaft.

[0008] In a possible design, the gas inlet and outlet connecting portion is also fixedly provided with a gas inlet pipe joint connected to the gas inlet and a gas outlet pipe joint connected to the gas outlet, the gas inlet pipe joint is connected to an external gas supply device through a conduit, and the gas outlet pipe joint is connected to the burner through a conduit.

[0009] In a possible design, the load-bearing slide includes a top plate and a pot support column, the top plate is fixedly connected to the first valve body portion, a plurality of pot support columns are evenly distributed on the top plate, and the plurality of pot support columns are used to support multiple pots.

[0010] In a possible design, the base includes a bottom plate and a plurality of bottom columns fixed under the bottom plate, a plurality of guide columns are also fixed on the bottom plate, and a number of sliding sleeves equal to the number of the guide columns are fixed on the top plate, and the sliding sleeves are slidably fitted with the guide columns.

[0011] In a possible design, the return spring assembly includes a main spring and a secondary spring, wherein the main spring is disposed inside the first valve body portion and the second valve body portion, and the secondary spring is disposed outside the first valve body portion and the second valve body portion.

[0012] In a possible design, the elastic force adjustment component is arranged between the main spring and the second valve body, and the elastic force adjustment component includes a first elastic force adjustment ring and a second elastic force adjustment ring, the first elastic force adjustment ring is arranged below the second elastic force adjustment ring, the first elastic force adjustment ring and the second valve body are only rotationally matched, and the second elastic force adjustment ring and the second valve body are only slidingly matched, a plurality of inclined surfaces are provided on the first elastic force adjustment ring and the second elastic adjustment ring, the first elastic force adjustment ring is fixedly connected to the adjustment lever, and the adjustment lever can be turned to control the rotation of the first elastic force adjustment ring, and the rotation of the first elastic adjustment ring can drive the second elastic adjustment ring to slide up and down, thereby controlling the compression amount of the main spring, the top end of the main spring is fixed to the end mounting ring, and the end mounting ring slides in the first valve body, and a plurality of elastic force adjustment threaded holes are provided on the top plate, and a main spring adjusting screw is threadedly connected to each elastic force adjustment threaded hole, and one end of each main spring adjusting screw located in the first valve body abuts against the end mounting ring.

[0013] In a possible design, a plurality of ball sockets are further provided on the first elastic force adjustment ring, and a rotation locking assembly is fixed on the second valve body portion, the rotation locking assembly includes a ball movable tube, a ball, a ball spring and a clamping force adjusting screw, the ball movable tube is fixed on the second valve body portion, the ball is slidably arranged in the ball movable tube, the ball movable tube is threadedly connected to the clamping force adjusting screw, the ball spring is provided between the ball and the clamping force adjusting screw, the ball spring is used to cooperate with the ball socket on the first elastic force adjustment ring to lock the first elastic force adjustment ring, and different ball sockets on the first elastic adjustment ring correspond to different elastic force conditions of the main spring.

[0014] In a possible design, the trigger lock assembly includes an arc-shaped slot plate, a first pressure rod, a lever iron sheet, a lock hook rolling ring, a second pressure rod and a push spring, the arc-shaped slot plate is fixed to the second valve body, an arc-shaped slot is provided on the arc-shaped slot plate, the first pressure rod and the second pressure rod slide in the arc-shaped slot, one end of the push spring is fixed to the top plate, the other end of the push spring is fixed to the middle part of the second pressure rod, a hinge seat is fixed on the top plate, one end of the lever iron sheet is hinged to the hinge seat on the top plate, and the other end of the lever iron sheet is provided with an expansion and pressure sheet, the bottom of which is hinged to the arc-shaped slot plate on one side. The hinged position is located below the bottom position of the arc-shaped groove, the lock hook rolling ring is rotatably arranged at the bottom of the lock hook frame, the top of the lock hook frame is fixed to the lower end of the lifting shaft, the lifting shaft passes through the top plate and the first valve body, the lifting shaft is slidably connected with the first valve body, a nut is fixed at the top end of the lifting shaft, a return spring is provided between the nut and the first valve body, the return spring enables the lock hook frame to be tightly attached to the first valve body except under the condition of gravity, when the load-bearing slide is at the topmost position, the first pressure rod abuts against the lock hook rolling ring, and a fixed rolling ring is rotatably provided at the upper position at the bottom of the arc-shaped groove.

[0015] In a possible design, when the load-bearing slide is pressed down to the lowest position, the first pressure rod is located at the bottom of the arc-shaped groove, and the locking hook roller is located below the first pressure rod.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0017] 1. The present invention realizes the anti-dry burning function through a load-bearing slide, a base and a gravity control valve arranged between the load-bearing slide and the base. When the water in the pot is reduced to a certain level, the overall weight of the pot is reduced, so that the load-bearing slide moves upward under the elastic force of the spring. After the lock is unlocked, the valve is closed instantly to prevent dry burning. The device as a whole adopts a fully mechanical structure to realize the anti-dry burning function, with more stable performance and more suitable for high-heat and high-humidity environments such as kitchens.

[0018] 2. The present invention controls the closing of the gas valve according to the weight reduction of water in the pot, and the adjustment is flexible. It can be flexibly adjusted according to the weight reduction of water in the pot. It can not only be used to prevent the cooker from drying out, but also can be used to automatically turn off the fire when making soup. For example, when making soup, without adding water to the pot, the total weight of the ingredients and the pot is two kilograms, and the user can adjust the total weight of the ingredients and the pot to three kilograms through the elastic adjustment component. In this way, the fire can be turned off when there is only one kilogram of water left in the pot, which can ensure that the fire can be turned off before the water in the pot is completely burned dry. The functions are diverse. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings described herein are used to provide a further understanding of the embodiments of the present invention, constitute a part of this application, and do not constitute a limitation of the embodiments of the present invention. In the drawings:

[0020] Figure 1 It is a structural schematic diagram of the fully mechanical anti-burn-dry adjustable self-closing gas valve of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the fully mechanical anti-burn-dry adjustable self-closing gas valve of the present invention observed from another direction;

[0022] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0023] Figure 4 It is a structural schematic diagram of the rotation locking assembly of the present invention;

[0024] Figure 5 It is a structural schematic diagram of the trigger lock assembly of the present invention;

[0025] Figure 6 A top view of the fully mechanical anti-burn-dry adjustable self-closing gas valve of the present invention;

[0026] Figure 7 for Figure 6 Sectional view at the middle BB;

[0027] Figure 8 for Figure 7 Enlarged view of point C in the middle;

[0028] Fig. 9 It is a schematic diagram of the structure at position C when the load-bearing slide is in a fully depressed state;

[0029] Fig.10 for Figure 7 Enlarged view of point D in the middle;

[0030] Fig.11 It is a structural schematic diagram of position D when the load-bearing slide is in a fully depressed state;

[0031] Fig.12 for Figure 7 Enlarged view of point E in the middle.

[0032] The reference numerals represent: 1-top plate, 2-bottom plate, 3-gravity control valve, 301-first valve body, 302-second valve body, 303-air outlet, 304-air inlet, 305-valve opening, 4-guide column, 5-triangular plate, 6-cooker support column, 7-adjusting lever, 8-arc groove plate, 9-first pressure rod, 10-lever iron sheet, 101-expansion pressure sheet, 11-bottom column, 12-core shaft, 13-sealing plug, 14-first elastic adjustment ring, 15-first Second elastic force adjustment ring, 16-main spring, 17-auxiliary spring, 18-gas outlet pipe joint, 19-ball socket, 20-touch ball movable tube, 21-touch ball, 22-touch ball spring, 23-clamping force adjustment screw, 24-lock hook rolling ring, 25-second pressure rod, 26-push spring, 27-lock hook frame, 28-pull back spring, 29-lifting shaft, 30-fixed rolling ring, 31-gas inlet pipe joint, 32-main spring adjustment screw, 33-end mounting ring, 34-sealing ring. DETAILED DESCRIPTION

[0033] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with embodiments and drawings. The exemplary embodiments of the present invention and their description are only used to explain the present invention and are not intended to limit the present invention.

[0034] Examples, such as Figures 1 to 12 As shown, the fully mechanical anti-burn-dry adjustable self-closing gas valve of this embodiment includes a load-bearing slide, a base, and a gravity control valve 3 arranged between the load-bearing slide and the base, the gravity control valve 3 includes a valve core assembly and a valve body assembly, the valve body assembly includes a valve core control part at the upper end and an inlet and outlet communicating part at the lower end, and the valve core control part is used to control the up and down movement of the valve core assembly;

[0035] An air inlet 304 is provided at the lower end of the air inlet and outlet communicating portion, and an air outlet 303 is provided at the upper end of the air inlet and outlet communicating portion. A valve opening 305 is provided between the air inlet 304 and the air outlet 303, and the valve core assembly is used to open and close the valve opening 305, thereby controlling the connection and disconnection between the air inlet 304 and the air outlet 303.

[0036] The valve core control part includes a first valve body part 301 and a second valve body part 302, the first valve body part 301 and the second valve body part 302 are slidably matched, the first valve body part 301 is fixed on the load-bearing slide, the second valve body part 302 is fixed to the inlet and outlet communication part, and the inlet and outlet communication part is fixed on the base;

[0037] The valve core assembly includes a core shaft 12, one end of the core shaft 12 is fixed on the load-bearing slide, and the other end of the core shaft 12 is fixed with a sealing plug 13. A one-way valve structure is formed by the cooperation between the sealing plug 13 and the valve opening 305. After the sealing plug 13 contacts the valve opening 305 above, the increase in air pressure below the sealing plug 13 will only increase the squeezing force of the sealing plug 13 on the valve opening 305, thereby ensuring the sealing effect between the sealing plug 13 and the valve opening 305. When the load-bearing slide is pressed down, the load-bearing slide drives the sealing plug 13 downward through the core shaft 12, thereby opening the valve opening 305, so that the natural gas entering from the gas pipe can reach the gas outlet 303 for combustion.

[0038] Furthermore, in order to ensure the sealing of the inlet and outlet connecting part, a sealing ring 34 is fixedly provided at the top of the inlet and outlet connecting part, and the sealing ring 34 is in contact with the core shaft 12. The sealing ring 34 can seal the fitting gap between the top of the inlet and outlet connecting part and the core shaft 12 to ensure that the sliding of the core shaft 12 will not cause leakage at the top of the inlet and outlet connecting part.

[0039] In this embodiment, a return spring assembly is provided between the first valve body portion 301 and the second valve body portion 302, and when the return spring assembly lifts the second valve body portion 302 to reach the topmost position, the sealing plug 13 closes the valve channel opening 305, and when the second valve body portion 302 drops to the lowest position, the opening and closing state between the sealing plug 13 and the valve channel opening 305 is the largest, and pressing the load-bearing slide can compress the return spring assembly, and after the pressing force is cancelled, the return spring assembly can restore the load-bearing slide to its original state. When boiling water, the pot is placed on the load-bearing slide. The weight of the pot and the water inside the pot is large, and the load-bearing slide is pressed down to the lowest position. In the process of the water in the pot being gradually evaporated, the return spring assembly drives the load-bearing slide to rise, and when the load-bearing slide rises, it drives the sealing plug 13 to rise, and finally closes the valve channel opening 305 to prevent the pot from being dry-burned.

[0040] Advantageously, a gas inlet pipe joint 31 connected to the air inlet 304 and a gas outlet pipe joint 18 connected to the air outlet 303 are fixedly provided on the air inlet and outlet connecting portion. The gas inlet pipe joint 31 is connected to an external gas supply device via a conduit, and the gas outlet pipe joint 18 is connected to the burner via a conduit to provide gas for combustion of the burner.

[0041] Furthermore, the load-bearing slide includes a top plate 1 and a pot support column 6, the top plate 1 is fixedly connected to the first valve body portion 301, and a plurality of pot support columns 6 are evenly distributed on the top plate 1, and the plurality of pot support columns 6 are used to support multiple pots, so that the plurality of pot support columns 6 act as a pot rack.

[0042] The base includes a bottom plate 2 and a plurality of bottom columns 11 fixedly arranged below the bottom plate 2, a plurality of guide columns 4 are also fixedly arranged on the bottom plate 2, and a sliding sleeve with the same number as the guide columns 4 is fixedly arranged on the top plate 1, and the sliding sleeves are slidably fitted with the guide columns 4, and the guide columns 4 can serve as sliding guides for the top plate 1, and the guide columns 4 can not only prevent the rotation between the load-bearing slide and the base, but also make the sliding of the load-bearing slide and the base bracket smoother, and can also keep the load-bearing slide and the base parallel to each other.

[0043] In this embodiment, the return spring assembly includes a main spring 16 and a secondary spring 17. The main spring 16 is arranged inside the first valve body 301 and the second valve body 302, and the secondary spring 17 is arranged outside the first valve body 301 and the second valve body 302.

[0044] When placing ingredients of different weights in the pot, it is necessary to make the rebound force for closing the valve mouth different. Therefore, the present embodiment further includes an elastic force adjustment component, which is arranged in the gravity control valve 3. More specifically, the elastic force adjustment component is arranged between the main spring 16 and the second valve body 302. The elastic force adjustment component includes a first elastic force adjustment ring 14 and a second elastic force adjustment ring 15. The first elastic force adjustment ring 14 is arranged below the second elastic force adjustment ring 15. The first elastic force adjustment ring 14 and the second valve body 302 are only rotationally matched. The second elastic force adjustment ring 15 and the first elastic force adjustment ring 14 are only rotationally matched. The two valve body parts 302 only slide together, and the first elastic adjustment ring 14 and the second elastic adjustment ring 15 are provided with multiple inclined surfaces. The first elastic adjustment ring 14 is fixedly connected to the adjustment lever 7. Turning the adjustment lever 7 can control the rotation of the first elastic adjustment ring 14. Rotating the first elastic adjustment ring 14 can drive the second elastic adjustment ring 15 to slide up and down, thereby controlling the compression amount of the main spring 16, and playing the effect of adjusting the elastic force of the main spring 16. After the main spring 16 is compressed, it will produce greater elastic force to lift heavier weight, thereby achieving the effect of adjusting the rebound force according to the weight of different ingredients in the pot.

[0045] It should be noted that an adjustment scale of the adjustment lever 7 is provided on the housing of the gas valve. When the adjustment lever 7 is rotated to the corresponding scale, it means that the resilience of the return spring assembly can lift an object of that weight and ensure that the sealing plug 13 closes the valve opening 305.

[0046] Furthermore, a plurality of ball sockets 19 are provided on the first elastic force adjustment ring 14, and a rotation locking assembly is fixed on the second valve body portion 302, wherein the rotation locking assembly comprises a ball movable tube 20, a ball 21, a ball spring 22 and a clamping force adjusting screw 23, wherein the ball movable tube 20 is fixed on the second valve body portion 302, the ball 21 is slidably arranged in the ball movable tube 20, the ball movable tube 20 is threadedly connected with the clamping force adjusting screw 23, and the ball spring 22 is provided between the ball 21 and the clamping force adjusting screw 23, the ball spring 22 is used to cooperate with the ball sockets 19 on the first elastic force adjustment ring 14 to lock the first elastic force adjustment ring 14, and the different ball sockets 19 on the first elastic force adjustment ring 14 correspond to the different elastic forces of the main spring 16, and further can correspond to the recovery elastic forces required for the different weights of the food in the cookware, thereby realizing the rapid adjustment of the food of different weights.

[0047] Advantageously, the top end of the main spring 16 is fixed to an end mounting ring 33, and the end mounting ring 33 slides in the first valve body portion 301. The top plate 1 is provided with a plurality of elastic force adjustment threaded holes, each of which is threadedly connected with a main spring adjusting screw 32. One end of each main spring adjusting screw 32 located in the first valve body portion 301 abuts against the end mounting ring 33. By rotating the main spring adjusting screw 32, the end mounting ring 33 can be driven to slide, thereby further controlling the elastic force of the main spring 16. After the elastic force of the main spring 16 changes during long-term use, the main spring adjusting screw 32 can further correct the elastic force of the main spring 16, thereby ensuring that the elastic force adjusted at the adjustment lever 7 will not deviate too much from the corresponding elastic force on the scale.

[0048] When in use, after adding ingredients of different weights into the pot, the overall weight of the pot changes. At this time, the adjustment lever 7 can be rotated to adjust the rebound force. A spring adjustment component is fixed on the entire gas valve shell to ensure that when no water is added to the pot, the load-bearing frame slide and the pot top on the slide can be raised to the highest position. At the same time, it is also necessary to ensure that after adding water, the pot can press down the load-bearing slide to open the valve opening 305. When the load-bearing slide bounces to the highest position, the sealing plug 13 closes the valve opening 305, and then water is added to the pot. After adding water, the weight of the pot increases. When the water in the pot increases to a level that the overall weight of the pot exceeds the rebound force, the load-bearing slide descends and continues to reach the lowest position during the process of adding water. After the water is added, you can start igniting.

[0049] In another case, such as when making soup, the weight of the ingredients and the pot in the pot without adding water is one catty. When in use, the weight of the adjustment lever 7 can be adjusted to two catties. In this way, the fire can be automatically turned off when the water in the pot is dried up to only one catty. This can not only achieve the effect of preventing dry burning, but also achieve the effect of "quantitative fire turning off" when making soup. It has various functions and can be used as a safety device or as a cooking auxiliary device. It is flexible and changeable to use.

[0050] The first valve body 301 and the second valve body 302 are also connected by a trigger lock assembly. After the cooking pot is placed on the load-bearing slide, the trigger lock assembly is pressed down to lock. During the heating process, the moisture in the pot decreases and it rises slowly in the early stage. After reaching the trigger unlocking height, the trigger lock is unlocked. The load-bearing slide drives the pot to rise rapidly, and at the same time, the sealing plug 13 also rises to cut off the gas.

[0051] refer to Figure 8 and Fig. 9 In this embodiment, the trigger lock assembly includes an arc-shaped groove plate 8, a first pressure rod 9, a lever iron sheet 10, a lock hook rolling ring 24, a second pressure rod 25 and a push spring 26. The arc-shaped groove plate 8 is fixed to the second valve body portion 302. An arc-shaped groove is provided on the arc-shaped groove plate 8. The first pressure rod 9 and the second pressure rod 25 slide in the arc-shaped groove. One end of the push spring 26 is fixed to the top plate 1, and the other end of the push spring 26 is fixed to the middle part of the second pressure rod 25. A hinge seat is fixed on the top plate 1. One end of the lever iron sheet 10 is hinged to the hinge seat on the top plate 1. The other end of the lever iron sheet 10 is provided with an expansion and compression sheet 101. The bottom of the expansion and compression sheet 101 is hinged to the arc-shaped groove plate 8 on one side. The hinged position is located below the bottom position of the arc groove, the lock hook roller 24 is rotatably arranged at the bottom of the lock hook frame 27, the top of the lock hook frame 27 is fixed to the lower end of the lifting shaft 29, the lifting shaft 29 passes through the top plate 1 and the first valve body 301, the lifting shaft 29 is slidably connected with the first valve body 301, a nut is fixed at the top end of the lifting shaft 29, a return spring 28 is provided between the nut and the first valve body 301, the return spring 28 enables the lock hook frame 27 to be tightly attached to the first valve body 301 except under the force of gravity, when the load-bearing slide is at the topmost position, the first pressure rod 9 abuts against the lock hook roller 24, and a fixed roller 30 is rotatably provided at the upper position at the bottom of the arc groove.

[0052] When in use, when the pot and the water inside push the load-bearing slide down to the lowest position (such as Fig. 9), the first pressure rod 9 is located at the bottom of the arc groove, and the lock hook roller ring 24 is located below the first pressure rod 9. At this time, the sealing plug 13 opens the valve channel 305, and the pot can be ignited to heat the pot. When the water in the pot is continuously evaporated, the lock hook roller ring 24 rises and contacts the first pressure rod 9 first, and then drives the first pressure rod 9 to rise together. After further rising, the fixed roller ring 30 and the lock hook roller ring 24 clamp and lock the first pressure rod 9 to complete the locking. At this time, the load-bearing slide rises further, and the pull-back spring 28 is compressed to store energy. During the rising process of the load-bearing slide, the lever iron sheet 10 will rotate with the expansion and pressure sheet 101. The rotation of the expansion and pressure sheet 101 will push the first pressure rod 9 out from the clamping state of the fixed roller ring 30 and the lock hook roller ring 24 to unlock it. At the moment of unlocking, the return spring 28 releases its elastic potential energy, causing the lock hook roller ring 24 and the lock hook frame 27 to rise rapidly, and the downward pressure on the load-bearing slide at the return spring 28 is also reduced. The rapid rise of the load-bearing slide drives the sealing plug 13 to close the valve opening 305.

[0053] It should be noted that the effect achieved by the trigger lock assembly is that the load-bearing slide rises slowly at first and then quickly, which mainly prevents the load-bearing slide from rising slowly and steadily, and the sealing plug 13 fails to completely close the valve opening 305 after rising to a certain position. At this time, the gas output of the valve opening 305 cannot support the burning of the flame, and the flame is extinguished, thereby causing gas leakage. In this embodiment, the trigger lock assembly is locked and energy is stored during the slow rise of the load-bearing slide. In this state, the flame can be ensured not to be extinguished, and then it is unlocked by the expansion and pressure plate 101. After unlocking, the load-bearing slide rises rapidly, and drives the sealing plug 13 to close the valve opening 305 to prevent gas leakage, thereby avoiding the occurrence of the above situation.

[0054] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A fully mechanical anti-burning dry adjustable self-closing gas valve, comprising a load-bearing slide, a base and a gravity control valve (3) arranged between the load-bearing slide and the base, characterized in that: The gravity control valve (3) comprises a valve core assembly and a valve body assembly, wherein the valve body assembly comprises a valve core control portion at the upper end and an air inlet and outlet communicating portion at the lower end, wherein the valve core control portion is used to control the up and down movement of the valve core assembly; An air inlet (304) is provided at the lower end of the air inlet and outlet connecting portion, an air outlet (303) is provided at the upper end of the air inlet and outlet connecting portion, a valve opening (305) is provided between the air inlet (304) and the air outlet (303), and the valve core assembly is used to open and close the valve opening (305), thereby controlling the connection and disconnection between the air inlet (304) and the air outlet (303); The valve core control part comprises a first valve body part (301) and a second valve body part (302), the first valve body part (301) and the second valve body part (302) are slidably matched, the first valve body part (301) is fixed on the load-bearing slide, the second valve body part (302) is fixed to the air inlet and outlet connecting part, and the air inlet and outlet connecting part is fixed on the base; The valve core assembly comprises a core shaft (12), one end of the core shaft (12) is fixed on a load-bearing slide, and the other end of the core shaft (12) is fixed with a sealing plug (13), and a one-way valve structure is formed by the cooperation between the sealing plug (13) and the valve channel opening (305); A return spring component and an elastic force adjustment component for adjusting the rebound force are provided between the first valve body portion (301) and the second valve body portion (302); The first valve body part (301) and the second valve body part (302) are also connected via a trigger lock assembly.

2. A fully mechanical anti-burn-dry adjustable self-closing gas valve according to claim 1, characterized in that: A sealing ring (34) is fixedly provided at the top end of the air inlet and outlet connecting portion, and the sealing ring (34) is in contact with and fits with the core shaft (12). The sealing ring (34) can seal the fitting gap between the top end of the air inlet and outlet connecting portion and the core shaft (12).

3. A fully mechanical anti-burn dry adjustable self-closing gas valve according to claim 1, characterized in that: A gas inlet pipe joint (31) connected to the gas inlet (304) and a gas outlet pipe joint (18) connected to the gas outlet (303) are also fixedly provided on the gas inlet and outlet connecting portion; the gas inlet pipe joint (31) is connected to an external gas supply device via a conduit, and the gas outlet pipe joint (18) is connected to the burner via a conduit.

4. A fully mechanical anti-burn dry adjustable self-closing gas valve according to claim 1, characterized in that: The load-bearing slide comprises a top plate (1) and a pot support column (6); the top plate (1) is fixedly connected to the first valve body (301); a plurality of pot support columns (6) are evenly distributed on the top plate (1); and the plurality of pot support columns (6) are used to support multiple pots.

5. A fully mechanical anti-burn-dry adjustable self-closing gas valve according to claim 4, characterized in that: The base comprises a bottom plate (2) and a plurality of bottom columns (11) fixedly arranged below the bottom plate (2); a plurality of guide columns (4) are also fixedly arranged on the bottom plate (2); and the top plate (1) is fixedly provided with sliding sleeves having the same number as the guide columns (4); the sliding sleeves are slidably matched with the guide columns (4).

6. A fully mechanical anti-burn-dry adjustable self-closing gas valve according to claim 1, characterized in that: The return spring assembly comprises a main spring (16) and a secondary spring (17), wherein the main spring (16) is arranged inside the first valve body portion (301) and the second valve body portion (302), and the secondary spring (17) is arranged outside the first valve body portion (301) and the second valve body portion (302).

7. A fully mechanical anti-burn-dry adjustable self-closing gas valve according to claim 6, characterized in that: The elastic force adjustment component is arranged between the main spring (16) and the second valve body (302), and the elastic force adjustment component includes a first elastic force adjustment ring (14) and a second elastic force adjustment ring (15). The first elastic force adjustment ring (14) is arranged below the second elastic force adjustment ring (15). The first elastic force adjustment ring (14) and the second valve body (302) are rotationally matched, and the second elastic force adjustment ring (15) and the second valve body (302) are slidingly matched. The first elastic force adjustment ring (14) and the second elastic force adjustment ring (15) are provided with a plurality of inclined surfaces. The first elastic force adjustment ring (14) is fixedly connected to the adjustment lever (7). The adjusting lever (7) can control the rotation of the first elastic force adjusting ring (14). Rotating the first elastic force adjusting ring (14) can drive the second elastic force adjusting ring (15) to slide up and down, thereby controlling the compression amount of the main spring (16). The top end of the main spring (16) is fixed to the end mounting ring (33). The end mounting ring (33) slides in the first valve body (301). A plurality of elastic force adjusting threaded holes are provided on the top plate (1). A main spring adjusting screw (32) is threadedly connected to each elastic force adjusting threaded hole. One end of each main spring adjusting screw (32) located in the first valve body (301) abuts against the end mounting ring (33).

8. A fully mechanical anti-burn-dry adjustable self-closing gas valve according to claim 7, characterized in that: A plurality of ball sockets (19) are also provided on the first elastic force adjustment ring (14), and a rotation locking assembly is fixed on the second valve body (302), wherein the rotation locking assembly comprises a ball movable tube (20), a ball (21), a ball spring (22) and a clamping force adjustment screw (23), wherein the ball movable tube (20) is fixed on the second valve body (302), the ball (21) is slidably arranged in the ball movable tube (20), the ball movable tube (20) is threadedly connected to the clamping force adjustment screw (23), and the ball spring (22) is provided between the ball (21) and the clamping force adjustment screw (23), and the ball spring (22) is used to cooperate with the ball socket (19) on the first elastic force adjustment ring (14) so ​​as to lock the first elastic force adjustment ring (14).

9. A fully mechanical anti-burn-dry adjustable self-closing gas valve according to claim 1, characterized in that: The trigger lock assembly comprises an arc-shaped groove plate (8), a first pressure rod (9), a lever iron sheet (10), a lock hook roller ring (24), a second pressure rod (25) and a push spring (26); the arc-shaped groove plate (8) is fixed to the second valve body (302); an arc-shaped groove is provided on the arc-shaped groove plate (8); the first pressure rod (9) and the second pressure rod (25) slide in the arc-shaped groove; one end of the push spring (26) is fixed to the top plate (1); the other end of the push spring (26) is fixed to the middle of the second pressure rod (25); a hinge seat is fixed on the top plate (1); one end of the lever iron sheet (10) is hinged to the hinge seat on the top plate (1); the other end of the lever iron sheet (10) is provided with an expansion and compression sheet (101); the bottom of the expansion and compression sheet (101) is hinged to the arc-shaped groove plate (8) on one side; the expansion and compression sheet (101) ) and the arc groove plate (8) are located below the bottom of the arc groove, the lock hook roller (24) is rotatably arranged at the bottom of the lock hook frame (27), the top of the lock hook frame (27) is fixed to the lower end of the lifting shaft (29), the lifting shaft (29) passes through the top plate (1) and the first valve body (301), the lifting shaft (29) is slidably connected to the first valve body (301), a nut is fixed at the top end of the lifting shaft (29), a return spring (28) is provided between the nut and the first valve body (301), the return spring (28) enables the lock hook frame (27) to be tightly attached to the first valve body (301) except under the condition of gravity, when the load-bearing slide is at the topmost position, the first pressure rod (9) abuts against the lock hook roller (24), and a fixed roller (30) is rotatably provided at the upper position of the bottom of the arc groove.

10. A fully mechanical anti-burn dry adjustable self-closing gas valve according to claim 9, characterized in that: When the load-bearing slide is pressed down to the lowest position, the first pressing rod (9) is located at the bottom of the arc-shaped groove, and the locking hook rolling ring (24) is located below the first pressing rod (9).

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