Safety gas valve

Abstract

The utility model provides a safety gas valve which comprises a valve body, a gas inlet channel, a middle channel, a gas outlet channel, a lower installation cavity and an upper installation cavity are arranged in the valve body, a ball valve used for opening and closing circulation of the middle channel and the gas outlet channel is arranged in the middle channel, and a valve rod connected with the ball valve is arranged on the valve body. An electromagnetic valve assembly is arranged in the lower mounting cavity, the electromagnetic valve assembly is connected with a sensing device through an electric control device, the upper mounting cavity is correspondingly arranged above the lower mounting cavity, a bouncing ejector rod assembly is arranged in the upper mounting cavity, the top end of the bouncing ejector rod assembly penetrates out of the valve body and abuts against the lower wall face of the cover plate, and the valve rod is sleeved with the cover plate; the gas stove is reasonable in structure, circulation of the middle channel and the gas outlet channel is controlled by rotating the ball valve through the valve rod, gas leakage caused by misoperation and accidental flameout and unattended conditions of the gas stove can be avoided through cooperation of the electromagnetic valve assembly, the sensing device and the bouncing ejector rod assembly, and the gas stove is safer to use.

Description

Technical Field

[0001] This utility model relates to a safety gas valve. Background Technology

[0002] Gas valves are safety devices in gas pipeline projects, used to cut off, connect, and regulate gas in the pipeline, possessing good control characteristics and sealing performance. However, current gas valves use only a single valve core for opening and closing, making them prone to misoperation. Furthermore, if a gas stove is accidentally extinguished and left unattended, gas will continue to flow, causing gas leaks and posing a significant safety hazard. Therefore, current technology requires improvement and development. Summary of the Invention

[0003] To address the shortcomings mentioned above, this utility model provides a safe gas valve.

[0004] To achieve the above objectives, this utility model provides a safety gas valve, including a valve body. The valve body has an inlet channel, a middle channel, an outlet channel, a lower mounting cavity, and an upper mounting cavity. A ball valve for opening and closing the middle channel and the outlet channel is provided within the middle channel. A valve stem connected to the ball valve is provided on the valve body. A solenoid valve assembly is provided in the lower mounting cavity, and the solenoid valve assembly is connected to a sensing device via an electronic control device. The upper mounting cavity is correspondingly located above the lower mounting cavity and contains a spring-loaded push rod assembly. The top end of the spring-loaded push rod assembly protrudes from the valve body and abuts against the lower wall of a cover plate. The solenoid valve assembly is mounted on the outside of the valve stem. In the power-off state, the solenoid valve assembly closes the flow of the intake channel and the intermediate channel. The solenoid valve assembly can be passively opened by pressing the spring-loaded rod assembly through the cover plate. When the temperature value detected by the sensor is higher than the preset temperature threshold, the electronic control device controls the solenoid valve assembly to automatically open the flow of the intake channel and the intermediate channel. When the temperature value detected by the sensor is not higher than the preset temperature threshold, the solenoid valve assembly is in the power-off state. When the spring-loaded rod assembly is released, it automatically rebounds, causing the solenoid valve assembly to restore the closed flow of the intake channel and the intermediate channel.

[0005] Furthermore, a valve cover is provided between the valve body and the cover plate. The valve stem includes a lower valve stem and an upper valve stem. The lower valve stem is in a clearance-sealed fit with the valve body and its lower end is engaged with a ball valve. The upper valve stem is in a clearance-fitted fit with the valve cover and its lower end is engaged with the lower valve stem and can move axially along the engaged position. A spring is provided between the lower valve stem and the upper valve stem for rebounding the upper valve stem. The upper end of the upper valve stem is engaged with a handwheel and an annular groove is provided on the side wall above the cover plate. A limiting member is sleeved on the annular groove.

[0006] Furthermore, the lower valve stem is provided with a vent hole one and a vent hole two communicating with the vent hole one on its side wall. The valve body side wall is provided with an exhaust port corresponding to the vent hole two. The ball valve is provided with a vent hole three in the rotation direction and a vent hole four perpendicular to the rotation plane. The vent hole four communicates with the vent hole one and the vent hole three respectively. The vent hole one is provided with a spring-loaded sealing assembly. The flow between the vent hole one and the vent hole four can be opened by pressing the spring-loaded sealing assembly with the upper valve stem.

[0007] Furthermore, the bouncing sealing assembly includes a bouncing core, a sealing ring 1, a limiting member 2, and a spring 2. The bouncing core has an annular groove 2 and an annular groove 3 at both ends, and the bouncing core is clearance-fitted with the vent hole 1. There are two sealing rings 1, which are respectively sleeved on the two ends of the bouncing core located at the vent hole 1. There are two limiting members 2, and both are sleeved on the upper end of the bouncing core located at the sealing ring 1. The spring 2 is located between the two limiting members 2 and is used to bounce the bouncing core back.

[0008] Furthermore, the valve body is connected to an ignition device at the exhaust port via a hose.

[0009] Furthermore, the lower valve stem sidewall is provided with multiple annular grooves four, and the corresponding vent hole two is provided with an annular groove five, and a sealing ring two is fitted on the annular groove four.

[0010] Furthermore, the lower mounting cavity is connected to the air intake channel and the upper mounting cavity respectively. The connection between the lower mounting cavity and the upper mounting cavity is a vent hole five. The upper mounting cavity is connected to the intermediate channel. The solenoid valve assembly includes a solenoid valve, a closing element, and a spring three. The solenoid valve is fixed in the lower mounting cavity and its output end is connected to the closing element. The spring three is located between the solenoid valve and the closing element. In the power-off state, the closing element blocks the vent hole five under the action of the spring three, and the closing element can be moved down to open the vent hole five by pressing the spring-loaded push rod assembly.

[0011] Furthermore, the spring-loaded push rod assembly includes a push rod and a spring four. The push rod is in a gap-sealed fit with the upper mounting cavity and has a convex ring at its upper end. The spring four is located between the upper mounting cavity and the convex ring and is used to rebound the push rod.

[0012] Furthermore, the upper mounting cavity is provided with a mounting slot corresponding to the spring four, and the top rod is provided with a sealing ring three corresponding to the mounting slot.

[0013] Furthermore, the valve body is provided with an installation port corresponding to the ball valve, and a cover is screwed onto the installation port.

[0014] The advantages of this utility model compared to the prior art are as follows: This utility model has a reasonable structure. The flow of gas in the intermediate channel and the gas outlet channel is controlled by rotating the ball valve through the valve stem. With the cooperation of the solenoid valve assembly, the sensing device, and the pop-up rod assembly, gas leakage can be avoided when the gas stove is accidentally extinguished and left unattended, or due to misoperation. It is safer to use. In addition, the cover plate of the pop-up rod assembly is sleeved on the outside of the valve stem, and the structure is compact. Attached Figure Description

[0015] Figure 1 This is a cross-sectional view of a safety gas valve according to the present invention;

[0016] Figure 2 This is a sectional view of the lower valve stem involved in this solution;

[0017] Figure 3 This is a 3D view of the lower valve stem involved in this solution;

[0018] Figure 4 This is a 3D view of the upper valve stem involved in this solution;

[0019] Figure 5 This is a 3D view of the gas valve involved in this solution;

[0020] Figure 6 This is a three-dimensional view of the valve body involved in this solution;

[0021] Figure 7 This is a plan view of the bouncing core involved in this solution. Detailed Implementation

[0022] like Figure 1 As shown in the figure, a safety gas valve according to an embodiment of the present invention includes a valve body 1. The valve body 1 is provided with an inlet channel 101, an intermediate channel 102, an outlet channel 103, a lower mounting cavity 104, and an upper mounting cavity 105. The upper mounting cavity 105 is correspondingly located above the lower mounting cavity 104. The lower mounting cavity 104 is connected to both the inlet channel 101 and the upper mounting cavity 105. The connection between the lower mounting cavity 104 and the upper mounting cavity 105 is a vent hole 107. The upper mounting cavity 105 is connected to the intermediate channel 102, and the intermediate channel 102 is connected to the outlet channel 103. Gas enters the gas valve and flows out after passing through the inlet channel 101, the lower mounting cavity 104, the vent hole 107, the upper mounting cavity 105, the intermediate channel 102, and the outlet channel 103.

[0023] Furthermore, such as Figure 1As shown, in this embodiment, a ball valve 2 is provided in the intermediate channel 102. The valve body 1 has an installation port 108 corresponding to the ball valve 2, and a cover 24 is screwed onto the installation port 108. A valve stem 3 connected to the ball valve 2 is provided on the valve body 1. The valve stem 3 controls the rotation of the ball valve 2, thereby opening and closing the intermediate channel 102 and the gas outlet channel 103 for flow. At the same time, an electromagnetic valve assembly 6 is provided in the lower mounting cavity 104. The electromagnetic valve assembly 6 is connected to the sensing device 7 through an electronic control device. The sensing device 7 includes a sensing needle provided on the gas stove, used to sense the ignition temperature of the gas stove and transmit the signal to the electronic control device. A spring-loaded push rod assembly 8 is provided in the upper mounting cavity 105. The top of the spring-loaded push rod assembly 8 protrudes from the valve body 1 and abuts against the lower wall of the cover plate 9. The cover plate 9 is fitted over the valve stem 3. In the power-off state, the solenoid valve assembly 6 closes the flow of the intake channel 101 and the intermediate channel 102. The solenoid valve assembly 6 can be passively opened by pressing the spring rod assembly 8 through the cover plate 9. When the temperature value detected by the sensing device 7 is higher than the preset temperature threshold, the electronic control device controls the solenoid valve assembly 6 to be energized and automatically open the flow of the intake channel 101 and the intermediate channel 102. When the temperature value detected by the sensing device 7 is not higher than the preset temperature threshold, the solenoid valve assembly 6 is in the power-off state. When the spring rod assembly 8 is released, it automatically rebounds, causing the solenoid valve assembly 6 to resume closing the flow of the intake channel 101 and the intermediate channel 102.

[0024] Furthermore, such as Figures 1-4 As shown, in this embodiment, a valve cover 10 is provided between the valve body 1 and the cover plate 9. The valve cover 10 is fixed to the upper end of the valve body 1. The valve stem 3 includes a lower valve stem 4 and an upper valve stem 5. The lower valve stem 4 is in a clearance-sealed fit with the valve body 1. The lower end of the lower valve stem 4 is provided with a protrusion 4-1 and the upper end is provided with a groove 4-2. The lower valve stem 4 is engaged with the ball valve 2 through the protrusion 4-1. The upper valve stem 5 is in a clearance fit with the valve cover 10. The lower end of the upper valve stem 5 is provided with a protrusion 5-1 and the upper end is provided with a locking part 5-2. The upper valve stem 5 is engaged with the groove 4-2 of the lower valve stem 4 through the protrusion 5-1 and can move along... The locking position moves axially. A spring 11 is provided between the lower valve stem 4 and the upper valve stem 5 to rebound the upper valve stem 5. The upper end of the upper valve stem 5 is locked with a handwheel 12 through the locking part 5-2, and an annular groove 501 is provided on the side wall above the cover plate 9. A limiting part 13 is sleeved on the annular groove 501. In use, the upper valve stem 5, the lower valve stem 4 and the ball valve 2 can be driven to rotate by rotating the handwheel 12. The cover plate 9 and the spring rod assembly 8 can be driven to be stressed by pressing the handwheel 12, so that the solenoid valve assembly 6 passively opens the air intake channel 101 and the intermediate channel 102.

[0025] Furthermore, such as 1~ Figure 6As shown, in this embodiment, the lower valve stem 4 is provided with a vent hole 401 and a vent hole 402 communicating with the vent hole 401 on its side wall. The valve body 1 is provided with an exhaust port 106 corresponding to the vent hole 402 on its side wall. The vent hole 401, the vent hole 402, and the exhaust port 106 are connected to form an exhaust channel 103. The valve body 1 is connected to an ignition device 26 through a hose at the exhaust port 106. At the same time, the ball valve 2 is provided with a vent hole 201 in the rotation direction and a vent hole 202 perpendicular to the rotation plane. The vent hole 202 communicates with the vent hole 401 and the vent hole 201 respectively. The intermediate channel 102 and the exhaust channel 103 can be opened and closed by rotating the ball valve 2.

[0026] Furthermore, such as Figures 1-7 As shown, in this embodiment, a spring-loaded sealing assembly 14 is provided on the vent hole 401. The spring-loaded sealing assembly 14 includes a spring core 15, a sealing ring 16, a limiting member 17, and a spring 25. The two ends of the spring core 15 are respectively provided with annular groove 1501 and annular groove 1502. The spring core 15 is clearance-fitted with the vent hole 401. There are two sealing rings 16. One sealing ring 16 is sleeved on the annular groove 1502 at the lower end of the vent hole 401 on the spring core 15, and the other sealing ring 16 is sleeved on the side wall of the spring core 15 at the upper end of the vent hole 401. There are two limiting members 17, both of which are sleeved on the side wall of the spring core 15 at the upper end of the sealing ring 16. The spring 25 is located between the two limiting members 17 and is used for rebound. The spring core 15; in the initial state, the spring core 15 tends to move upward under the spring force of the second spring 25, so that the sealing ring 16 at the lower end of the vent hole 401 blocks the flow between the vent hole 402 and the vent hole 401. When the handwheel 12 is pressed, the upper valve stem 5 moves downward, the spring core 15 moves downward after being pressed, and the sealing ring 16 at the lower end leaves the vent hole 401, and the vent hole 401 and the vent hole 402 are opened for flow. That is, pressing the handwheel 12 can passively open the flow between the air intake channel 101 and the intermediate channel 102 of the solenoid valve assembly 6, and can also open the flow between the intermediate channel 102 and the air outlet channel 103. The flow between the intermediate channel 102 and the air outlet channel 103 is affected by the combined action of the rotation and pressing of the handwheel 12.

[0027] Furthermore, such as Figure 2 , Figure 3 , Figure 6As shown, in this embodiment, the lower valve stem 4 has multiple annular grooves 403 on its side wall and an annular groove 404 corresponding to the vent hole 402. A sealing ring 27 is fitted on the annular groove 403. The sealing ring 27 improves the sealing between the lower valve stem 4 and the valve body 1. The annular groove 5 404 is located between the multiple annular grooves 403, which makes the flow between the vent hole 402 and the exhaust port 106 smoother.

[0028] Furthermore, such as Figure 1 As shown, the solenoid valve assembly 6 in this embodiment includes a solenoid valve 18, a closing element 19, and a spring 20. The solenoid valve 18 is fixed in the lower mounting cavity 104 and its output end is connected to the closing element 19. The spring 20 is located between the solenoid valve 18 and the closing element 19. In the power-off state, the closing element 19 blocks the vent hole 107 under the action of the spring 20, and the closing element 19 can be moved down to open the vent hole 107 by pressing the spring-loaded rod assembly 8.

[0029] Furthermore, such as Figure 1 As shown, the spring-loaded push rod assembly 8 in this embodiment includes a push rod 21 and a spring 22. The push rod 21 is in a clearance-sealed fit with the upper mounting cavity 105 and has a protruding ring 2101 at its upper end. The upper mounting cavity 105 has a mounting slot 1051. The spring 22 is located between the mounting slot 1051 and the protruding ring 2101 in the upper mounting cavity 105 and is used to rebound the push rod 21. A sealing ring 23 is provided on the outside of the push rod 21 corresponding to the mounting slot 1051. The sealing ring 23 is located between the mounting slot 1051 and the spring 22 and is sealed by the action of the spring 22 to prevent gas from leaking out of the mounting slot 1051.

[0030] In practical use, such as Figure 1 , Figure 2As shown: First, turn the handwheel 12 to drive the ball valve 2 to rotate, allowing the vent 3 201 to flow through the intermediate channel 102. Press the handwheel 12 to move the closing element 19 down to open the vent 5 107, and cause the spring-loaded core 15 to move down to open the vent 1 401 and the vent 4 202. After releasing the handwheel 12, the spring-loaded core 15 and the closing element 19 rebound for a certain period of time, leaving a certain amount of gas in the hose between the gas valve and the ignition device 26. Turn on the ignition device 26 on the gas stove. When the temperature value detected by the sensing device 7 is higher than the preset temperature threshold... When the value is reached, the electronic control device controls the solenoid valve assembly 6 to be energized, and the closing element 19 is kept in a downward state by electromagnetic force, so that the gas can flow continuously in the gas valve. If the temperature value detected by the sensing needle on the sensing device 7 is not higher than the preset temperature threshold, the electronic control device controls the solenoid valve assembly 6 to be de-energized, and the closing element 19 blocks the vent hole 107 under the action of spring 3 20. The spring core 15 blocks the flow of vent hole 1 401 and vent hole 4 202 under the action of spring 2 25. When the handwheel 12 is not turned to drive the ball valve 2 to rotate, pressing the handwheel 12 will not allow the gas to flow.

[0031] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A safety gas valve, characterized in that: The system includes a valve body (1), which contains an air inlet channel (101), an intermediate channel (102), an air outlet channel (103), a lower mounting cavity (104), and an upper mounting cavity (105). The intermediate channel (102) contains a ball valve (2) for opening and closing the flow between the intermediate channel (102) and the air outlet channel (103). A valve stem (3) connected to the ball valve (2) is mounted on the valve body (1). A solenoid valve assembly (6) is located in the lower mounting cavity (104). The solenoid valve assembly (6) is connected to a sensing device (7) via an electronic control device. The upper mounting cavity (105) is positioned above the lower mounting cavity (104) and contains a spring-loaded rod assembly (8). The top of the spring-loaded rod assembly (8) extends out of the valve body (1) and abuts against the lower wall of a cover plate (9). The cover plate (9)... The solenoid valve assembly (6) is sleeved outside the valve stem (3). In the power-off state, the solenoid valve assembly (6) closes the flow of the intake channel (101) and the intermediate channel (102). The solenoid valve assembly (6) can be passively opened by pressing the spring rod assembly (8) through the cover plate (9). When the temperature value detected by the sensing device (7) is higher than the preset temperature threshold, the electronic control device controls the solenoid valve assembly (6) to be powered on and automatically open the flow of the intake channel (101) and the intermediate channel (102). When the temperature value detected by the sensing device (7) is not higher than the preset temperature threshold, the solenoid valve assembly (6) is in the power-off state. When the spring rod assembly (8) is released, it automatically rebounds and the solenoid valve assembly (6) resumes closing the flow of the intake channel (101) and the intermediate channel (102).

2. A safety gas valve according to claim 1, characterized in that: A valve cover (10) is provided between the valve body (1) and the cover plate (9). The valve stem (3) includes a lower valve stem (4) and an upper valve stem (5). The lower valve stem (4) is sealed to the valve body (1) with a gap and its lower end is engaged with the ball valve (2). The upper valve stem (5) is fitted to the valve cover (10) with a gap and its lower end is engaged with the lower valve stem (4) and can move axially along the engagement position. A spring (11) is provided between the lower valve stem (4) and the upper valve stem (5) for rebounding the upper valve stem (5). The upper end of the upper valve stem (5) is engaged with the handwheel (12) and an annular groove (501) is provided on the side wall above the cover plate (9). A limiting member (13) is sleeved on the annular groove (501).

3. A safety gas valve according to claim 2, characterized in that: The lower valve stem (4) is provided with a vent hole 1 (401) and a vent hole 2 (402) communicating with the vent hole 1 (401) on its side wall. The valve body (1) is provided with an exhaust port (106) corresponding to the vent hole 2 (402) on its side wall. The ball valve (2) is provided with a vent hole 3 (201) in the rotation direction and a vent hole 4 (202) perpendicular to the rotation plane. The vent hole 4 (202) is connected to the vent hole 1 (401) and the vent hole 3 (201) respectively. The vent hole 1 (401) is provided with a spring-loaded sealing assembly (14). The flow between the vent hole 1 (401) and the vent hole 4 (202) can be opened by pressing the spring-loaded sealing assembly (14) with the upper valve stem (5).

4. A safety gas valve according to claim 3, characterized in that: The bouncing sealing assembly (14) includes a bouncing core (15), a sealing ring (16), a limiting member (17), and a spring (25). The two ends of the bouncing core (15) are respectively provided with annular grooves (1501) and annular grooves (1502). The bouncing core (15) is in clearance fit with the vent hole (401). There are two sealing rings (16), which are respectively sleeved on the two ends of the bouncing core (15) located at the vent hole (401). There are two limiting members (17), which are both sleeved on the upper end of the bouncing core (15) located at the sealing ring (16). The spring (25) is located between the two limiting members (17) and is used to bounce the bouncing core (15).

5. A safety gas valve according to claim 3, characterized in that: The valve body (1) is connected to an ignition device (26) via a hose at the exhaust port (106).

6. A safety gas valve according to claim 3, 4, or 5, characterized in that: The lower valve stem (4) has multiple annular grooves four (403) on its side wall and an annular groove five (404) corresponding to the vent hole two (402). A sealing ring two (27) is fitted on the annular groove four (403).

7. A safety gas valve according to claim 1, characterized in that: The lower mounting cavity (104) is connected to the air intake channel (101) and the upper mounting cavity (105) respectively. The connection between the lower mounting cavity (104) and the upper mounting cavity (105) is the vent hole five (107). The upper mounting cavity (105) is connected to the intermediate channel (102). The solenoid valve assembly (6) includes a solenoid valve (18), a closing element (19), and a spring three (20). The solenoid valve (18) is fixed in the lower mounting cavity (104) and its output end is connected to the closing element (19). The spring three (20) is located between the solenoid valve (18) and the closing element (19). In the power-off state, the closing element (19) blocks the vent hole five (107) under the action of the spring three (20), and the closing element (19) can be moved down to open the vent hole five (107) by pressing the spring-loaded rod assembly (8).

8. A safety gas valve according to claim 1 or 7, characterized in that: The spring-loaded top rod assembly (8) includes a top rod (21) and a spring four (22). The top rod (21) is in a gap-sealed fit with the upper mounting cavity (105) and has a convex ring (2101) at its upper end. The spring four (22) is located between the upper mounting cavity (105) and the convex ring (2101) and is used to rebound the top rod (21).

9. A safety gas valve according to claim 8, characterized in that: The upper mounting cavity (105) is provided with a mounting slot (1051) corresponding to the spring four (22), and the top rod (21) is provided with a sealing ring three (23) corresponding to the mounting slot (1051).

10. A safety gas valve according to claim 1, characterized in that: The valve body (1) is provided with an installation port (108) corresponding to the ball valve (2), and a cover (24) is screwed onto the installation port (108).

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