Safety electronic ignition valve for gas burner

Abstract

The invention discloses a safety electronic ignition valve for a gas burner, and relates to the technical field of gas electronic valves, firstly, a mechanical linkage structure of'deflector rod-air taper sleeve-gas limiting taper sleeve-taper rod 'is formed through combination, and active proportioning of air supply quantity and gas quantity is realized by combining real-time regulation and control of a control assembly; secondly, due to the spiral air groove structures of the fuel gas taper sleeve and the air taper sleeve, fuel gas and air form spiral turbulent flow to be evenly mixed, and finally, in the fire stopping stage, a fuel gas backflow channel is quickly blocked in a dual fuel gas cutting-off mode of a normal opening of the transfer ball core and an air limiting arc piece, and the fuel gas backflow channel is prevented from being blocked. And the pressure buffering effect of the middle air bag and the pressure supplementing effect of the air inlet are synchronously utilized, the reverse negative pressure difference is counteracted, flame backflow caused by negative pressure is avoided, the gas combining section of the double-right-angle flow channel provides a buffering space, the flame backflow path is prolonged, and the flame returning probability is further reduced.

Description

Technical Field

[0001] This invention relates to the field of gas electronic valve technology, and more specifically to a safety electronic ignition valve for a gas burner. Background Technology

[0002] Taking the ignition valve used in a gas burner as an example: it not only regulates the amount of gas but also provides safety protection. When an abnormality is detected (such as undervoltage or overcurrent), it can automatically shut off the gas intake process in a short time. However, it is important to note that: firstly, the amount of gas entering the burner must be guaranteed, and secondly, the amount of air entering the burner must be guaranteed.

[0003] The amount of gas / air entering the system varies depending on the combustion requirements, especially for high-volume gas requirements. For example, a high-powered kitchen stove uses about 3 m³ / h of gas. To ensure complete combustion, a certain amount of air supply is required. The air supply method is mainly self-aspiration (which works in conjunction with the pressure generated when the gas is supplied) and is directly proportional to the amount of gas entering the system. However, in reality, the air supply method achieved by self-aspiration is not sufficient to meet the combustion requirements. A gas-air mixture ratio that is too high or too low will affect the combustion effect.

[0004] It is particularly important to note that at the moment combustion stops, there is a high risk of backfire due to the high pressure difference generated by the instantaneous switching of air intake and the heat radiation from combustion. If the requirement of high gas intake is met, a high-pressure environment corresponding to the gas outlet direction is formed inside the overall gas duct. Then, at the moment the gas supply stops, a negative pressure difference in the opposite direction (corresponding to the gas supply direction) will inevitably be generated. This invention proposes a solution to this problem. Summary of the Invention

[0005] The purpose of this invention is to provide a safety electronic ignition valve for a gas burner. For safety valves used in the gas combustion process, the air supply method mainly depends on the gas supply process, which cannot fully meet the combustion requirements under actual conditions. In addition, there is a risk of backfire due to high negative pressure difference during the combustion cessation process.

[0006] The objective of this invention can be achieved through the following technical solution: a safety electronic ignition valve for a gas burner, comprising a valve body and an actuation component, wherein the valve body is provided with a double right-angle flow channel, and a transfer ball core and a gas limiting cone sleeve are respectively provided at the right-angle positions corresponding to the double right-angle flow channels, and a gas cone sleeve and an air cone sleeve are provided between the transfer ball core and the gas limiting cone sleeve, arranged from top to bottom; A vertically oriented lever is provided between the transfer ball core, the gas cone sleeve, and the air cone sleeve. An electromagnetic component corresponding to the lever is installed on the lower outer side of the valve body. An intermediate air bladder is provided between the gas cone sleeve and the air cone sleeve. A control assembly corresponding to the intermediate air bladder and the double right-angle flow channel is provided outside the valve body.

[0007] The configuration is further defined as follows: the transfer ball core is rotatably connected in the double right-angle flow channel via the action component along the radial direction of the lever, and the transfer ball core is provided with a normally open side corresponding to the gas inlet section of the double right-angle flow channel.

[0008] The further configuration is as follows: the lever is equipped with a gas-limiting arc plate corresponding to the transfer ball core, the gas-limiting arc plate is set at a 90-degree angle to the normal opening, and a dynamic opening is formed between the gas-limiting arc plate and the transfer ball core.

[0009] The configuration is further defined as follows: a buffer damping component corresponding to the upper end of the lever is installed at the center point of the top of the internal top of the transfer ball core, and the lever moves linearly in a small amplitude in the vertical direction through an electromagnetic component.

[0010] Further configuration: the double right-angle flow channel consists of a gas inlet section arranged in a horizontal direction, a mixed gas outlet section, and a gas combining section arranged in a vertical direction. The gas limiting cone sleeve is slidably connected in the vertical direction in the gas combining section, and multiple cone rods are installed at the lower end of the gas limiting cone sleeve.

[0011] The cone rod is further configured such that its cross-section is a frustum of a circle and it penetrates the lower end of the valve body. A spring is provided on the outer wall between the lower end of the limiting cone sleeve and the upper end of the combining section. An air inlet is formed between the cone rod and the valve body.

[0012] The gas cone sleeve and the air cone sleeve are further configured such that the cross-sections of the gas cone sleeve and the air cone sleeve are respectively conical and inverted conical, and spiral gas grooves are provided on the outer surface of both the gas cone sleeve and the air cone sleeve. The diameter of the lower end of the gas cone sleeve is smaller than the diameter of the upper end of the air cone sleeve.

[0013] The further configuration is as follows: the upper and lower ends of the air-limiting cone sleeve are open, and the position of the upper outer surface of the air-limiting cone sleeve matches the position of the outer surface of the air cone sleeve.

[0014] The gas cone sleeve, air cone sleeve, and lever are respectively connected in a sliding connection and a fixed connection, and the intermediate airbag and lever are connected in a sliding connection.

[0015] The present invention has the following beneficial effects: Based on the safety electronic valve, a double right-angle flow channel was first optimized. The mixing section within it provides a buffer space, extending the flame backflow path and the mixed gas path, reducing the probability of backfire. Based on the gas / air cone sleeve, the complementary conical and inverted conical structures of the gas and air cone sleeves, combined with the spiral gas grooves on the outer surface, create a strong turbulent mixing effect between the gas and air. This is significantly different from the conventional self-aspirating method, greatly improving the uniformity of the mixing and ensuring complete combustion. This not only improves energy utilization but also reduces the emission of harmful gases from incomplete combustion.

[0016] During the two processes of gas intake and air intake, the mechanical linkage structure of "lever - air cone sleeve - gas limiting cone sleeve - cone rod" combined with the real-time control of the control assembly enables the active and precise matching of air supply and gas volume. The intake volume can be dynamically adjusted according to combustion needs to meet different gas volume combustion requirements. The key feature is the "double insurance" gas cut-off mechanism of "converter ball core with constant opening + gas limiting arc plate". It quickly cuts off the gas supply at the moment combustion stops. At the same time, the gas-combining section of the double right-angle flow channel provides a buffer space. With the pressure buffer of the intermediate airbag and the pressure replenishment effect of the air inlet, it effectively counteracts the reverse negative pressure difference generated when the flame stops, completely blocks the backfire channel, prevents the flame from flowing back to the gas intake section, and eliminates safety hazards. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a safety electronic ignition valve for a gas burner proposed in this invention; Figure 2 For the present invention Figure 1 Sectional view of the middle valve body; Figure 3 For the present invention Figure 2 Cross-sectional view of the ball core in the intermediate transfer circuit; Figure 4 In this invention Figure 3 The front view; Figure 5 This is a schematic diagram of the air-limiting cone seat in this invention; Figure 6 This is a schematic diagram showing the positions of the gas cone sleeve and the air cone sleeve in this invention.

[0019] In the diagram: 1. Valve body; 2. Actuating component; 3. Control assembly; 4. Electromagnetic component; 5. Transfer ball core; 6. Gas cone sleeve; 7. Intermediate air bag; 8. Air cone sleeve; 9. Gas limiting cone sleeve; 10. Buffer damping component; 11. Lever; 12. Gas limiting arc plate; 13. Cone rod. Detailed Implementation

[0020] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] Example 1: For safety valves used in the gas combustion process, the air supply method mainly relies on the gas supply process, which cannot fully meet the combustion requirements under actual conditions. In addition, there is a risk of backfire due to high negative pressure difference during the combustion cessation process. The following technical solution is proposed to address this issue: Reference Figures 1-6 In this embodiment, a safety electronic ignition valve for a gas burner includes a valve body 1 and an actuation component 2. The valve body 1 is provided with a double right-angle flow channel, and a transfer ball core 5 and a gas limiting cone sleeve 9 are respectively provided at the right-angle positions of the double right-angle flow channel. A gas cone sleeve 6 and an air cone sleeve 8 are provided between the transfer ball core 5 and the gas limiting cone sleeve 9, arranged from top to bottom. A vertically oriented lever 11 is provided between the transfer ball core 5, the gas cone sleeve 6, and the air cone sleeve 8. An electromagnetic component 4 corresponding to the lever 11 is installed on the lower outer side of the valve body 1. An intermediate air bag 7 is provided between the gas cone sleeve 6 and the air cone sleeve 8. A control assembly 3 corresponding to the intermediate air bag 7 and the double right-angle flow channel is provided on the outside of the valve body 1. The transfer ball core 5 is rotatably connected in the double right-angle flow channel along the radial direction of the lever 11 via the actuation component 2. The transfer ball core 5 has a normally open side corresponding to the gas inlet section of the double right-angle flow channel.

[0022] Basic Structure Description: A brief explanation of the electronic ignition valve: It discharges the mixture of gas and air and ignites the mixture via electronic ignition. This invention will not elaborate on the electronic ignition process itself, but will focus on explaining the gas-air mixing process. Figure 1 As shown, the gas enters from the left side of valve body 1, while the air is drawn in from the lower side of valve body 1, and the mixture is finally discharged from the right side of valve body 1. This invention is based on the principle of valve components, such as a ball valve with a central ball core 5, which is driven to rotate directionally by the actuating component 2 to change the opening degree, and further refers to... Figure 3The electromagnetic component 4 can also be used to drive the lever 11 to move up and down, thereby driving the gas limiting arc plate 12 to adjust the opening in the vertical direction. The essence is to use a "double insurance" mechanism to adjust the amount of gas entering. The key purpose is to avoid the danger of gas backflow under high flow combustion requirements. For example, in the case of a high-power stove, the gas entering pressure (flow) is very high. At the moment of turning off the flame, the negative pressure difference generated will cause the gas mixture to backflow. Therefore, in this embodiment, two opening adjustment methods are used to avoid the gas mixture backflow. The key content of this invention lies in the overall double right-angle flow channel. In addition to the horizontally arranged gas inlet section and mixed gas outlet section, a "dedicated" mixing section is also provided for mixing gas and intake air. The purpose is to ensure that the gas and air have enough space to mix and to provide a buffer area for possible subsequent mixed gas backflow process. However, its focus still depends on the cooperation process of the gas cone sleeve 6 and the air cone sleeve 8.

[0023] Example 2: Explanation of the combustion gas entry stage and air intake stage during the air intake process: A limiting arc plate 12 corresponding to the transfer ball core 5 is installed on the lever 11. The limiting arc plate 12 is set at a 90-degree angle to the normally open end, and a dynamic opening is formed between the limiting arc plate 12 and the transfer ball core 5. A buffer damping element 10 corresponding to the upper end of the lever 11 is installed at the center point of the top of the transfer ball core 5. The lever 11 moves linearly in a small amplitude in the vertical direction via the electromagnetic component 4. The double right-angle flow channel consists of a horizontally arranged gas inlet section, a mixed gas outlet section, and a vertically arranged gas combining section. The limiting cone sleeve 9 is slidably connected in the vertical direction in the gas combining section, and multiple cone rods 13 are installed at the lower end of the limiting cone sleeve 9. The cross-section of the cone rod 13 is a frustum of a circle, and the cone rod 13... A spring is installed on the outer wall between the lower end of the gas limiting cone sleeve 9 and the upper end of the gas mixing section, at the lower end of the valve body 1. An air inlet is formed between the cone sleeve 13 and the valve body 1. The cross-sections of the gas cone sleeve 6 and the air cone sleeve 8 are conical and inverted conical, respectively. Spiral air grooves are opened on the outer surfaces of both the gas cone sleeve 6 and the air cone sleeve 8. The lower diameter of the gas cone sleeve 6 is smaller than the upper diameter of the air cone sleeve 8. The upper and lower ends of the gas limiting cone sleeve 9 are open, and the position of the upper outer surface of the gas limiting cone sleeve 9 matches the position of the outer surface of the air cone sleeve 8. The gas cone sleeve 6, the air cone sleeve 8 and the lever 11 are respectively slidably connected and fixedly connected. The intermediate air bag 7 and the lever 11 are slidably connected.

[0024] Based on the above, the gas combustion process is described as follows: S1: Gas ignition stage: The actuating component 2 drives the transfer ball core 5 to rotate radially along the lever 11, and the normally open section of the corresponding gas inlet gradually opens (in the initial state, the normally open section is closed). Gas flows from the horizontal gas inlet section into the double right-angle flow channel. At the same time, the electromagnetic component 4 is energized to generate magnetic force, which drives the lever 11 to move linearly downward in the vertical direction. When the lever 11 moves downward, the gas limiting arc plate 12 installed on it moves synchronously. Since the gas limiting arc plate 12 and the normally open section are set at a 90-degree angle, the two form a dynamic opening, thereby ensuring that the gas inlet section and the mixed gas outlet section are gradually connected. Therefore, the basic content of this invention is: the amount of gas passing through can be precisely controlled by the downward movement of the lever 11 to avoid excessive or insufficient gas during the start-up stage. During the downward movement of lever 11, air cone sleeve 8, which is fixedly connected to lever 11, moves downward synchronously, pushing gas limiting cone sleeve 9 to slide downward along the vertical direction of the gas mixing section. The cone rod 13 at the lower end of the gas limiting cone sleeve 9 moves downward accordingly, increasing the opening of the air inlet between the cone rod 13 and the valve body 1. Under the negative pressure generated by the flow of gas and the mechanical assistance of the movement of cone rod 13, outside air is quickly drawn into the gas mixing section from the air inlet. The following explanation is also required for part S1: S1-1: In the initial state, the air cone sleeve 8 is used to press down on the gas limiting cone sleeve 9, so that the gas limiting cone sleeve 9 is also in the initial state. In essence, the design of the frustum-shaped structure of the cone rod 13 relies on the forced elasticity of the spring to continuously generate an upward thrust on the gas limiting cone sleeve 9. The purpose is to ensure that the air inlet is also blocked when no gas enters. However, when the lever 11 moves downward, the air cone sleeve 8 can generate downward pressure on the gas limiting cone sleeve 9, thereby opening the air inlet. It should be explained that the opening degree of the air inlet is proportional to the opening degree of the gas limiting arc plate 12 relative to the transfer ball core 5. S1-2: In addition, the incoming gas enters the gas cone sleeve 6 area, and the air enters the air cone sleeve 8 area. The two form a spiral airflow through the spiral air grooves on their respective outer surfaces. They are initially mixed in the docking / intermediate area of ​​the gas cone sleeve 6 and the air cone sleeve 8 (because the diameter of the lower end of the gas cone sleeve is smaller than the diameter of the upper end of the air cone sleeve, a flared mixing space is formed), and then enter the mixing section to complete the full mixing. S2: Gas-air mixing stage: Firstly, monitoring structures can be added to the gas mixture discharge section and the intermediate gas bag 7, mainly for detecting gas pressure and gas concentration. The intermediate gas bag 7 only has a gas pressure detection structure. A gas pressure / concentration detection structure is also added to the gas mixture discharge section. If the gas concentration is detected to be too high or too low, the vertical position of the lever 11 is changed by adjusting the magnetic strength of the electromagnetic component 4, as shown below: When the gas concentration is too low, without changing the rotation angle of the transfer ball core 5, the lever 11 moves further down, the gas limiting arc plate 12 expands the dynamic opening, increasing the gas supply. At the same time, the air cone sleeve 8 moves down more, the air inlet opening increases, and the air intake volume is increased. Conversely, when the gas concentration is too high, the amount of gas entering the mixture needs to be reduced, and the amount of air intake will also be reduced in order to ensure the mixing process.

[0025] The key points to note above are: S2-1: The gas cone sleeve 6, the intermediate air bag 7 and the lever 11 are slidably connected. Essentially, the two can slide around the axial direction or rotate around the radial direction with the lever 11. The downward movement / rotation of the gas cone sleeve 6 is directly related to the amount of gas entering. The intermediate air bag 7 is subjected to the gas pressure inside the overall double right-angle flow channel on the one hand, and the downward pressure from the gas cone sleeve 6 on the other hand. However, its auxiliary role is that when the gas supply pressure changes suddenly, the intermediate air bag 7 elastically expands and contracts to buffer the pressure impact and avoid the imbalance of the mixing ratio caused by the sudden rise or fall of the gas pressure. S2-2: Further explanation regarding the gas cone sleeve 6: The gas cone sleeve 6 maintains a sliding / rotational connection with the lever 11. Its conical structure complements the inverted conical structure of the air cone sleeve 8. Together with the spiral air grooves on the outer surfaces of the two, the gas and air form a strong turbulent mixing effect, breaking the mixing limitations of the traditional self-aspiration method. At the same time, the spring on the outer wall of the cone rod 13 provides elastic support for the gas limiting cone sleeve 9, so that the opening of the air inlet can be dynamically and adaptively adjusted according to the gas pressure, ensuring that the air supply is always proportional to the gas supply. S3: Combustion cessation stage. This stage is the key part of the invention. First, the gas supply needs to be cut off. The actuating component 2 drives the intermediate ball core 5 to rotate in the opposite direction, and the normally open end closes quickly. At the same time, the electromagnetic component 4 drives the lever 11 to move slowly upward. The buffer damping component 10 only serves as a connecting fulcrum. The gas limiting arc plate 12 quickly seals the dynamic opening. This double protection ensures that the gas supply is completely cut off in a short time. However, the overall process also involves the mixing process in S2. S3-1: When lever 11 moves upward, air cone sleeve 8 moves upward simultaneously, and gas limiting cone sleeve 9 slides upward under the elastic restoring force of spring. The air inlet gradually shrinks but does not close immediately. At this time, the negative pressure generated in the combined gas section due to the cessation of gas supply is balanced by a small amount of air drawn in through the not fully closed air inlet. At the same time, the intermediate airbag 7 elastically rebounds, releasing the buffer pressure and offsetting the reverse negative pressure difference. Its essence is to "retain" the generated negative pressure difference, but it will not draw in gas and cause backflow into the gas supply pipeline. Instead, it will re-draw in air for "reverse" balance. The constant opening of the transfer ball core 5 and the double sealing of the gas limiting arc plate 12, together with the buffer space of the combined gas section and the pressure replenishment effect of the air inlet, completely block the backfire channel caused by the high negative pressure difference at the moment of combustion cessation, and prevent the flame from flowing back to the gas inlet section. In summary, based on the above content, the overall solution of this invention is still based on the principle of gas combustion. First, it forms a mechanical linkage structure of "lever - air cone sleeve - gas limiting cone sleeve - cone rod". Combined with the real-time control of the control assembly, it realizes the active matching of air supply and gas quantity. Second, the spiral gas groove structure of the gas cone sleeve and air cone sleeve makes the gas and air form a spiral turbulent mixing uniformly. Finally, during the shutdown phase, the dual gas cut-off of the intermediate ball core and the gas limiting arc plate quickly blocks the gas backflow channel. At the same time, the pressure buffer of the intermediate air bag and the pressure supplement of the air inlet are used to offset the reverse negative pressure difference and prevent the flame from backflowing due to negative pressure. The gas mixing section of the double right-angle flow channel provides a buffer space, extends the flame backflow path, and further reduces the probability of backfire.

[0026] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to specific implementations. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A safety electronic ignition valve for a gas burner, comprising a valve body (1) and an actuation assembly (2), characterized in that, The valve body (1) is provided with a double right-angle flow channel inside, and a transfer ball core (5) and a gas limiting cone sleeve (9) are respectively provided at the right-angle position of the double right-angle flow channel. A gas cone sleeve (6) and an air cone sleeve (8) are provided between the transfer ball core (5) and the gas limiting cone sleeve (9) from top to bottom. A lever (11) is arranged vertically between the transfer ball core (5), the gas cone sleeve (6) and the air cone sleeve (8). An electromagnetic component (4) corresponding to the lever (11) is installed on the lower outer side of the valve body (1). An intermediate air bag (7) is arranged between the gas cone sleeve (6) and the air cone sleeve (8). A control assembly (3) corresponding to the intermediate air bag (7) and the double right-angle flow channel is arranged on the outside of the valve body (1).

2. A safety electronic ignition valve for a gas burner according to claim 1, characterized in that, The transfer ball core (5) is rotatably connected in the double right-angle flow channel via the action component (2) along the lever (11), and the transfer ball core (5) is provided with a normal opening on one side of the gas inlet section of the double right-angle flow channel.

3. A safety electronic ignition valve for a gas burner according to claim 2, characterized in that, The lever (11) is equipped with a gas limiting arc plate (12) corresponding to the transfer ball core (5). The gas limiting arc plate (12) is set at a 90-degree angle to the normal opening, and a dynamic opening is formed between the gas limiting arc plate (12) and the transfer ball core (5).

4. A safety electronic ignition valve for a gas burner according to claim 3, characterized in that, The center point of the top of the transfer ball core (5) is equipped with a buffer damping element (10) corresponding to the upper end of the lever (11). The lever (11) moves linearly in a small amplitude in the vertical direction through the electromagnetic component (4).

5. A safety electronic ignition valve for a gas burner according to claim 1, characterized in that, The double right-angle flow channel consists of a gas inlet section arranged in a horizontal direction, a mixed gas outlet section, and a gas combining section arranged in a vertical direction. The gas limiting cone sleeve (9) is slidably connected in the vertical direction in the gas combining section, and multiple cone rods (13) are installed at the lower end of the gas limiting cone sleeve (9).

6. A safety electronic ignition valve for a gas burner according to claim 5, characterized in that, The cone rod (13) has a cross-section in the shape of a frustum of a circle and passes through the lower end of the valve body (1). A spring is provided on the outer wall between the lower end of the gas limiting cone sleeve (9) and the upper end of the gas combining section. An air inlet is formed between the cone rod (13) and the valve body (1).

7. A safety electronic ignition valve for a gas burner according to claim 1, characterized in that, The cross-sections of the gas cone sleeve (6) and the air cone sleeve (8) are conical and inverted conical, respectively, and spiral gas grooves are provided on the outer surfaces of both the gas cone sleeve (6) and the air cone sleeve (8). The lower diameter of the gas cone sleeve (6) is smaller than the upper diameter of the air cone sleeve (8).

8. A safety electronic ignition valve for a gas burner according to claim 7, characterized in that, The upper and lower ends of the air-limiting cone sleeve (9) are open, and the position of the upper outer surface of the air-limiting cone sleeve (9) matches the position of the outer surface of the air cone sleeve (8).

9. A safety electronic ignition valve for a gas burner according to claim 7, characterized in that, The gas cone sleeve (6), the air cone sleeve (8) and the lever (11) are respectively slidably connected and fixedly connected, and the intermediate airbag (7) and the lever (11) are slidably connected.

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