Piezoelectric ignition gas safety valve

Abstract

The utility model discloses a piezoelectric ignition gas safety valve relates to gas utensil field, aims at solving the problem of existing valve operation cumbersome, ignition ventilation is not synchronous. It includes first valve (including electromagnetic valve and jackscrew) and second valve (including valve body, valve core and pivot) that set up in proper order along the gas flow direction, and the pivot is set up valve core and drives its rotation to control gas passage, cam structure rotates with the pivot synchronously, and its first drive part drives the jackscrew to open electromagnetic valve through linkage mechanism (torsion spring), and the second drive part triggers the piezoelectric igniter of valve body one side. The case realizes two valve opening and ignition through single rotation action synchronously, and is equipped with double valve protection, and also can realize multi -gear adjustment fire through the valve core lead -through hole and the cooperation of multiple gas outlet, adapts the scene such as camping, and the operation is convenient, and the safety is high, and the adaptability is strong.

Description

Technical Field

[0001] This utility model relates to the field of gas appliances, specifically to a piezoelectric ignition gas safety valve. Background Technology

[0002] Gas stoves are an important cooking and heating tool in modern households, and gas safety valves are commonly used safety switching devices for gas stoves.

[0003] Chinese Patent Publication No. CN211175581U discloses a novel gas safety valve, including a valve seat and an upper valve body and a lower valve body disposed at both ends of the valve seat. The inner cavity of the valve seat has a first cavity connected to the gas inlet pipe and a second cavity connected to the gas outlet pipe, and a third cavity is provided between the first cavity and the second cavity. A solenoid valve is provided in the cavity of the lower valve body, and the solenoid valve is connected to a valve core. One end of the valve core is provided with a first sealing gasket for airtightly sealing the first cavity and the second cavity. This gas safety valve has a simple and efficient structure. Through the setting structure of the micro-switch, it is easier to use and operate, and has good safety performance. However, the gas safety valve in the prior art requires pressing the button for more than 10 seconds, which requires continuous force from the user and is prone to fatigue; moreover, it requires three steps: "press the button → turn on the ignition switch → turn on the main gas switch", which is redundant. In addition, the above-mentioned gas safety valves and traditional valves often have the problem of "ignition and gas supply not being synchronized": either gas is supplied first but not ignited, resulting in gas leakage, or ignition is supplied first but gas supply is not, resulting in ignition failure; and ignition, valve opening, and flame adjustment are independent functions that need to be operated separately.

[0004] Therefore, overcoming the aforementioned shortcomings has become an important issue that urgently needs to be addressed by those skilled in the art. Utility Model Content

[0005] This invention overcomes the shortcomings of the above-mentioned technologies and provides a piezoelectric ignition gas safety valve.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A piezoelectric ignition gas safety valve, comprising: The first valve 1 includes a solenoid valve 11 and a push rod 12. The push rod 12 is set corresponding to the trigger end of the solenoid valve 11 and is used to drive the trigger end to open the solenoid valve 11. The second valve 2 includes a valve body 21, a valve core 22 and a rotating shaft 23. The valve core 22 is rotatably installed in the valve body 21. The rotating shaft 23 passes through the valve core 22 and is connected to the valve core 22. When the rotating shaft 23 rotates, it drives the valve core 22 to rotate to control the gas passage. A cam structure that rotates synchronously with the rotating shaft 23, and the cam structure is provided with a first driving part and a second driving part; A linkage mechanism is provided on the valve body. The linkage mechanism has a first end that is driven by the second driving part and a second end for driving the push rod 12 to move. The piezoelectric igniter 5 is located on one side of the valve body 21 and is triggered by the second driving unit; Among them, the first valve 1 and the second valve 2 are set sequentially along the gas flow direction.

[0007] Preferably, the linkage mechanism is a torsion spring 4, and the valve body 21 has a longitudinal mounting member 211 protruding on one side of the cam structure. The torsion spring 4 includes: a torsion spring body 41 sleeved on the longitudinal mounting member 211, a first lever arm 42 that extends obliquely upward from the front starting end of the torsion spring body 41 toward the position near the first lever 31 and then bends backward, and a second lever arm 43 that extends obliquely downward from the rear end of the torsion spring body 41 toward the position near the second lever 32 and then bends backward.

[0008] Preferably, the cam structure includes a cam 3 sleeved on the outer periphery of the valve core 22, and the first driving part and the second driving part are respectively a first lever 31 and a second lever 32 protruding on the outer periphery of the cam 3. The first lever 31 protrudes on one side of the outer periphery of the cam 3, and the second lever 32 protrudes on the other side of the outer periphery of the cam 3 opposite to the first lever 31.

[0009] Preferably, a positioning recess 222 is formed on the top periphery of the valve core 22, and a protrusion 232 matching the positioning recess 222 is raised on the outer periphery of the rotating shaft 23. The rotating shaft 23 is engaged and fixed with the positioning recess 222 on the valve core 22 through the protrusion 232.

[0010] Preferably, the valve body 21 is provided with at least one air outlet 6, one end of the rotating shaft 23 extends out of the valve body 21 for operation, and the other end is connected to the valve core 22. The valve core 22 is embedded in the bottom of the valve body 21 and is provided with at least one first through hole 223. The first through hole 223 can be aligned or misaligned with different numbers of air outlets 6 in the valve body 21 as the valve core 22 rotates.

[0011] Preferably, the rotating shaft 23 has a planar step portion 230 at its top for easy gripping and rotation, and a limiting ring 231 is also fitted around the outer periphery of the rotating shaft 23.

[0012] Preferably, a first spring 7 is provided between the bottom of the rotating shaft 23 and the valve core 22.

[0013] Preferably, the first valve 1 is installed on the rear side of the second valve 2 by screws. It includes a first valve seat 13. The first valve seat 13 is provided with a transverse extension channel 131 and a vertical extension channel 132 communicating with the middle of the transverse extension channel 131. A solenoid valve 11 and a push rod 12 for pressing the trigger end of the solenoid valve 11 are installed inside the transverse extension channel 131. The bottom opening of the vertical extension channel 132 is an air inlet 8.

[0014] Preferably, the top of the top rod 12 is provided with a top plate 91, and a connecting ring 92 is sleeved in the middle therein, and a washer 93 is installed on the connecting ring 92. A second spring 94 is sleeved between the washer 93 and the top plate 91 on the top rod 12.

[0015] Preferably, the second valve 2 further includes: a second valve seat 24 that covers the top of the valve body 21 and covers the bottom of the valve core 22 and the rotating shaft 23. The second valve seat 24 is connected to an igniter bracket 25. A portion of the igniter bracket 25 covers the planar structure 251 on the top of the second valve seat 24, and another portion extends forward to form a suspended frame structure 252 for the piezoelectric igniter 5 to be placed therein.

[0016] Compared with the prior art, the beneficial effects of this utility model are: 1. This design triggers mechanical linkage through a single rotation of the shaft, simultaneously opening the second valve, the first solenoid valve (pushed by the push rod), and piezoelectric ignition. It eliminates the need for pressing and multi-step switching, solving the problem of redundant steps in traditional valve operation. It is especially suitable for scenarios with limited space and requiring rapid operation, such as camping. At the same time, the design of the flat stepped part on the top of the shaft increases the grip and further optimizes the user experience, greatly improving the ease of operation.

[0017] 2. This design employs a dual shut-off structure consisting of a solenoid valve (first valve) and a mechanical valve core (second valve). In the event of an accidental flameout, the solenoid valve can quickly cut off the gas supply. Furthermore, the precise coordination between the cam and the torsion spring ensures that the ignition and gas supply actions are linked and synchronized, reducing the risk of gas leakage. At the same time, the design of the first spring between the valve core and the rotating shaft, and the second spring at the push rod, respectively strengthens the valve core sealing and the solenoid valve triggering buffer, reducing component wear and leakage risks.

[0018] 3. In this case, the rotating shaft and valve core are fixed by a protrusion and a positioning notch. The irregular configuration of the cam and torsion spring (obliquely extending and bending lever arm) achieves efficient transmission and ensures the linkage and synchronization of each component. The "planar structure + suspended frame" of the igniter bracket provides a stable installation and operating space for the piezoelectric igniter. The pad and spring at the top rod ensure even force distribution and automatic reset. At the same time, the number of valve core guide holes can be adjusted to accommodate multiple gas outlets, realizing multi-level firepower adjustment to cover different cooking needs and making it more adaptable. Attached Figure Description

[0019] Figure 1 This is one of the three-dimensional structural diagrams of the piezoelectric ignition gas safety valve in this case.

[0020] Figure 2 This is the second three-dimensional structural diagram of the piezoelectric ignition gas safety valve in this case.

[0021] Figure 3 This is an exploded view of the piezoelectric ignition gas safety valve in this case.

[0022] Figure 4 This is a partial structural diagram of the piezoelectric ignition gas safety valve in this case, showing a hidden portion of its structure.

[0023] Figure 5 This is a cross-sectional structural diagram of the first valve in this case.

[0024] Figure 6 This is a cross-sectional structural diagram of the second valve in this case. Detailed Implementation

[0025] The following examples provide a more detailed description of the features and other related characteristics of this utility model, to facilitate understanding by those skilled in the art: Example 1 like Figures 1 to 6 A piezoelectric ignition gas safety valve includes a first valve 1 and a second valve 2 arranged sequentially along the gas flow direction; The first valve 1 is installed on the rear side of the second valve 2 by screws. It includes a first valve seat 13, which has a horizontally extending channel 131 and a vertically extending channel 132 connected to the middle of the horizontally extending channel 131. A solenoid valve 11 and a push rod 12 for pressing the trigger end of the solenoid valve 11 are installed inside the horizontally extending channel 131. The bottom opening of the vertically extending channel 132 is an air inlet 8. Thus, the first valve is installed on the rear side of the second valve by screws, achieving precise fixation of both valves along the gas flow direction and facilitating disassembly and maintenance. The horizontally extending channel and the vertically extending channel of the first valve seat form a "T-shaped" gas passage, creating a continuous flow path between the air inlet (bottom of the vertical channel), the solenoid valve (inside the horizontal channel), and the second valve, ensuring gas flow along a preset path. Simultaneously, the horizontal channel provides stable installation space for the solenoid valve and the push rod, ensuring precise pressing of the push rod against the trigger end of the solenoid valve, effectively improving valve assembly efficiency and operational reliability.

[0026] The second valve 2 includes a valve body 21, a valve core 22, and a rotating shaft 23. The valve core 22 is rotatably embedded in the valve body 21. The rotating shaft 23 passes through the middle of the valve core 22 and is fixedly connected to it. When the rotating shaft 23 rotates, it drives the valve core 22 to rotate to control the gas passage. Specifically, the valve core 22 is embedded in the bottom of the valve body 21 and has first through holes 223 on both sides. The valve body 21 has gas outlets 6 on both sides. One end of the rotating shaft 23 extends out of the valve body 21 for operation, and the other end is connected to the valve core 22. Thus, when rotating, it drives the valve core 22 to rotate, thereby opening the first through holes 223 to the gas outlets 6, thus opening the second valve 2 and controlling the gas passage. In specific implementations, the structure of the valve core can also be adjusted, such as the number of through holes, to allow multiple gas outlets to be made. The firepower can be adjusted by changing the number of gas outlets. In this way, by rotating the valve core to align the guide hole with different numbers of air outlets, the firepower can be adjusted in different levels (such as high, medium, and low), improving the product's practicality and user experience.

[0027] The cam structure rotates synchronously with the rotating shaft 23. The cam structure includes a first driving part and a second driving part. Specifically, the cam structure includes a cam 3 sleeved on the outer periphery of the valve core 22 and connected to the rotating shaft 23. The first driving part and the second driving part are respectively a first lever and a second lever. Furthermore, the cam 3 rests on the second valve body 21, is fixedly connected to the rotating shaft 23, has a first lever 31 protruding from one side of its outer periphery, and a second lever 32 protruding from the other side of its outer periphery opposite to the first lever 31.

[0028] The rotating shaft 23 has a protrusion 232 on its outer periphery, which engages with the positioning recess 222 on the valve core 22 for fixation. When the rotating shaft 23 rotates, it drives the cam structure to rotate, thereby driving the first shift block 31 and the second shift block 32 to rotate together. In this way, the engagement structure between the protrusion and the positioning recess fixes the rotating shaft and the valve core, ensuring the synchronization and reliability of the transmission, while also simplifying assembly and facilitating production and maintenance.

[0029] The linkage mechanism is a torsion spring 4 located near the first lever 31 and longitudinally mounted on the valve body 21 via a longitudinal mounting member 211. Unlike a typical torsion spring, the torsion spring 4 includes a torsion spring body 41. A first lever arm 42 extends obliquely upwards from the front end of the torsion spring body 41 towards the first lever 31 and then bends backwards. A second lever arm 43 extends obliquely downwards from the rear end of the torsion spring body 41 towards the second lever 32 and then bends backwards. When the shaft rotates, the first lever arm 42 is pushed by the first lever 31, causing the torsion spring to rotate, which in turn causes the second lever arm 43 to rotate, thereby pushing the push rod 12 and pressing the trigger end to open the solenoid valve 11. Thus, this application further clarifies that the linkage mechanism is a torsion spring and its unique spatial configuration. The patent itself utilizes an irregular torsion spring design that "slopes upward and then backward" and "slopes downward and then backward," which can efficiently convert the rotational motion of the cam into a linear push on the push rod. It also takes advantage of the energy storage and reset characteristics of the spring, resulting in a clever structure, reliable transmission, and low cost.

[0030] The piezoelectric igniter 5 is located on one side of the valve body 21 and has a pressable trigger cover 51. The cover 51 is pushed by the second drive part / second lever 32 to make the piezoelectric igniter generate a high-voltage electric spark.

[0031] When the rotating shaft 23 rotates, it drives the cam 3 to rotate, causing the first lever 31 and the second lever 32 to rotate together. The rotational force of the first lever 31 actuates the first lever arm 42, causing the torsion spring to rotate. This causes the second lever arm 43 to rotate downwards, pushing the push rod and triggering the solenoid valve to open, thus opening the first valve. Simultaneously, before the first valve is fully opened, the second lever rotates along with the rotating shaft. The force of the second lever pushes the piezoelectric cap, and the force generated by the cap pressing down momentarily strikes the ceramic, producing a momentary high-voltage electric spark. Thus, this application concretizes the first and second driving parts as levers on opposite sides of the outer periphery of the cam, resulting in a simple structure and convenient processing.

[0032] As described above, this application achieves the opening of two valves and triggering ignition through a single action: a fully automated and safe process of mechanical valve opening → linkage opening of the solenoid valve → synchronous piezoelectric ignition. Users do not need to press any buttons, simplifying operation and fundamentally solving the problems of redundant steps and cumbersome operation. Furthermore, the two-valve design (solenoid valve + mechanical valve) uses the first valve as an emergency flameout control solenoid valve and the second valve as a normal valve, improving safety and preventing gas leakage. Simultaneously, this application forces ignition and gas supply synchronization through mechanical linkage, fundamentally eliminating the risk of gas leakage and ignition failure. Through the precise coordination of the cam structure and linkage mechanism, ignition is triggered before the first valve (solenoid valve) is fully opened, ensuring that gas is already flowing during ignition and that ignition occurs instantaneously after gas supply, resulting in extremely high synchronization and guaranteed safety.

[0033] like Figure 1 and Figure 6 As shown, in a preferred embodiment, the rotating shaft 23 has a flat stepped portion 230 at its top for easy gripping and rotation, and a limiting ring 231 is also fitted around the outer periphery of the rotating shaft 23. Thus, the design of the flat stepped portion increases the convenience and feel of user operation, prevents slippage, and is a detailed design detail that enhances the user experience. The limiting ring is used for axial positioning of the rotating shaft 23.

[0034] like Figure 3 and Figure 4 as well as Figure 6 As shown, in a preferred embodiment, a first spring 7 is provided between the bottom of the rotating shaft 23 and the valve core 22. Thus, by providing a first spring between the bottom of the rotating shaft and the valve core, a continuous axial preload can ensure a tight seal when the valve core is closed, reducing gas leakage; it also buffers the impact force during rotation, preventing component wear and extending service life; simultaneously, it accommodates assembly errors, ensures reliable linkage, and comprehensively optimizes the valve's sealing performance, durability, and assembly compatibility.

[0035] like Figure 4 As shown, in a preferred embodiment, the top of the push rod 12 is provided with a top plate 91, and a connecting ring 92 is sleeved in its middle, with a washer 93 installed on the connecting ring 92. A second spring 94 is sleeved between the washer 93 and the top plate 91 on the push rod 12. This ensures smooth contact and uniform force between the push rod and the trigger end of the solenoid valve, and the spring provides buffering and automatic reset, protecting the solenoid valve from damage by hard impacts, improving the reliability of operation and extending component life.

[0036] like Figure 2 and Figure 3 As shown, in a preferred embodiment, the second valve 2 further includes a second valve seat 24 that covers the top of the valve body 21, the second valve seat 24 housing the valve core 22 and the bottom of the rotating shaft 23. The second valve seat 24 is connected to an igniter bracket 25, a portion of which covers the planar structure 251 on top of the second valve seat 24, and another portion extends forward to form a suspended frame structure 252 into which the piezoelectric igniter 5 is inserted. Specifically, the piezoelectric igniter has a protruding locking block at its bottom, and the suspended frame structure 252 has a locking slot that matches the locking block, facilitating stable installation of the piezoelectric igniter.

[0037] As described above, the second valve seat and the specially designed igniter bracket provide a stable, reliable, and accurately positioned mounting base for the piezoelectric igniter. This suspended frame structure ensures the stability of the piezoelectric igniter while providing it with sufficient operating space, serving as a crucial structural support for ensuring the reliability of the ignition action.

[0038] In summary, this case discloses a piezoelectric ignition gas safety valve, relating to the field of gas appliances, aiming to solve the problems of cumbersome operation and asynchronous ignition and gas flow in existing valves. It includes a first valve (including a solenoid valve and a push rod) and a second valve (including a valve body, valve core, and rotating shaft) arranged sequentially along the gas flow direction. The rotating shaft passes through the valve core and drives it to rotate to control the gas passage. A cam structure rotates synchronously with the rotating shaft; its first drive unit drives the push rod to open the solenoid valve through a linkage mechanism (torsion spring), and the second drive unit triggers the piezoelectric igniter on one side of the valve body. This invention achieves simultaneous opening and ignition of both valves through a single rotational action, and features dual valve protection. Furthermore, it can achieve multi-level ignition adjustment through the valve core's guide hole and multiple gas outlets, making it suitable for camping and other scenarios. It is convenient to operate, highly safe, and highly adaptable.

[0039] As stated above, this case protects a piezoelectric ignition gas safety valve, and all technical solutions that are the same as or similar to this case should be considered to fall within the scope of protection of this case.

Claims

1. A piezoelectric ignition gas safety valve, characterized in that, include: The first valve (1) includes a solenoid valve (11) and a push rod (12). The push rod (12) is set to the trigger end of the solenoid valve (11) and is used to drive the trigger end to open the solenoid valve (11). The second valve (2) includes a valve body (21), a valve core (22) and a rotating shaft (23). The valve core (22) is rotatably installed inside the valve body (21). The rotating shaft (23) passes through the valve core (22) and is connected to the valve core (22). When the rotating shaft (23) rotates, it drives the valve core (22) to rotate to control the gas passage. A cam structure that rotates synchronously with the rotating shaft (23) is provided with a first driving part and a second driving part; A linkage mechanism is provided on the valve body. The linkage mechanism has a first end that is driven by the second driving part and a second end for driving the push rod (12) to move. A piezoelectric igniter (5) is disposed on one side of the valve body (21) and is triggered by the second drive unit; Among them, the first valve (1) and the second valve (2) are set in sequence along the gas flow direction.

2. The piezoelectric ignition gas safety valve according to claim 1, characterized in that, The linkage mechanism is a torsion spring (4). The valve body (21) has a longitudinal mounting piece (211) protruding on one side of the cam structure. The torsion spring (4) includes: a torsion spring body (41) sleeved on the longitudinal mounting piece (211), a first lever arm (42) extending obliquely upward from the front starting end of the torsion spring body (41) towards the position close to the first lever (31) and then bending backward. A second lever arm (43) extending obliquely downward from the rear end of the torsion spring body (41) towards the position close to the second lever (32) and then bending backward.

3. The piezoelectric ignition gas safety valve according to claim 1, characterized in that, The cam structure includes a cam (3) sleeved on the outer periphery of the valve core (22). The first driving part and the second driving part are respectively a first paddle (31) and a second paddle (32) protruding on the outer periphery of the cam (3). The first paddle (31) protrudes on one side of the outer periphery of the cam (3), and the second paddle (32) protrudes on the other side of the outer periphery of the cam (3) opposite to the first paddle (31).

4. The piezoelectric ignition gas safety valve according to claim 1 or 3, characterized in that, The valve core (22) has a positioning recess (222) formed on the top four sides of the wall. The rotating shaft (23) has a protrusion (232) on its outer periphery that matches the positioning recess (222). The rotating shaft (23) is locked and fixed to the positioning recess (222) on the valve core (22) by the protrusion (232).

5. The piezoelectric ignition gas safety valve according to claim 1, characterized in that, The valve body (21) is provided with at least one air outlet (6). One end of the rotating shaft (23) extends out of the valve body (21) for operation, and the other end is connected to the valve core (22). The valve core (22) is embedded in the bottom of the valve body (21) and has at least one first through hole (223). The first through hole (223) can be aligned or misaligned with different numbers of the air outlets (6) in the valve body (21) as the valve core (22) rotates.

6. The piezoelectric ignition gas safety valve according to claim 1 or 5, characterized in that, The rotating shaft (23) has a flat step (230) at its top for easy gripping and rotation, and a limiting ring (231) is also fitted around the outer periphery of the rotating shaft (23).

7. The piezoelectric ignition gas safety valve according to claim 1 or 3, characterized in that, A first spring (7) is provided between the bottom of the rotating shaft (23) and the valve core (22).

8. The piezoelectric ignition gas safety valve according to claim 1, characterized in that, The first valve (1) is installed on the rear side of the second valve (2) by screws. It includes a first valve seat (13). The first valve seat (13) is provided with a transverse extension channel (131) and a vertical extension channel (132) connected to the middle of the transverse extension channel (131). A solenoid valve (11) and a push rod (12) for pressing the trigger end of the solenoid valve (11) are installed inside the transverse extension channel (131). The bottom opening of the vertical extension channel (132) is an air inlet (8).

9. The piezoelectric ignition gas safety valve according to claim 1, characterized in that, The top rod (12) has a top plate (91) at the top and a connecting ring (92) in the middle and a washer (93) on the connecting ring (92). A second spring (94) is sleeved between the washer (93) and the top plate (91) on the top rod (12).

10. The piezoelectric ignition gas safety valve according to claim 1, characterized in that, The second valve (2) further includes: a second valve seat (24) that covers the top of the valve body (21) and covers the bottom of the valve core (22) and the shaft (23). The second valve seat (24) is connected to an igniter bracket (25). A portion of the igniter bracket (25) covers the planar structure (251) on top of the second valve seat (24), and the other portion extends forward to form a suspended frame structure (252) into which the piezoelectric igniter (5) is placed.

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