Gas cock valve and upper and lower fire exhaust control system with the gas cock valve

Abstract

The present invention relates to a gas cock valve, comprising a valve body having an internal air inlet passage, a first air outlet passage, and a second air outlet passage. A valve core is disposed within a valve core cavity of the valve body, the valve core being provided with a vent cavity and a fire hole. A valve stem is provided through the valve body. The valve body is characterized in that a control valve mounting cavity is also disposed within the valve body, the control valve mounting cavity and the valve core cavity being connected via a valve port. The air inlet passage communicates with the control valve mounting cavity. An electrically controlled self-priming valve is mounted at the bottom of the valve body. When the electrically controlled self-priming valve loses power, it blocks the valve port. When the electrically controlled self-priming valve receives power, it opens the valve port. A potentiometer is secured to the top of the valve body, the rotor portion of the potentiometer being mounted on the valve stem. This gas cock valve enables automatic control of the fire intensity of upper and lower fire scoops. The present invention also relates to a control system for upper and lower fire scoops.

Description

Technical Field

[0001] The present invention relates to a gas cock valve with upper and lower fire grate control functions suitable for use in a gas oven, and also relates to an upper and lower fire grate control system with the gas cock valve. Background Art

[0002] Some gas ovens have two baking chambers spaced apart from each other, each of which is equipped with a fire grate. For example, the Chinese utility model patent "A double-cavity gas oven composed of a guide plate" with patent number ZL201220709936.8 (publication number CN203059420U) discloses such a gas oven.

[0003] In order to achieve the regulation of fire intensity, the applicant has applied for a Chinese utility model patent with patent number CN201821212627.3 (publication number CN208831808U) "Gas valve capable of controlling two fire bars and with a long-lasting flame function", which discloses a gas valve comprising a valve body with an air inlet channel, a first air outlet channel and a second air outlet channel inside, a rotatable valve core is provided in the valve body, a ventilation cavity with an opening facing downward is provided at the lower part of the valve core, a fire hole is provided on the side wall of the ventilation cavity, a knob rod for driving the valve core to rotate is passed through the valve body, and the knob rod maintains an upward movement tendency; it is characterized in that: a long-lasting flame outlet channel and a valve plate for controlling the air outlet amount of the first outlet channel are also provided in the valve body, and the rotation of the knob rod can drive the valve plate to move, the long-lasting flame outlet channel and the first air outlet channel are located on one side of the valve core, and the second air outlet channel is located on the other side of the valve core, and the air inlet channel is located at the bottom of the valve core; When the knob rod and the valve core are in the original state, the fire hole is blocked from the first air outlet channel, the second air outlet channel and the eternal fire air outlet channel at the same time; when the knob rod is rotated clockwise from the original state to the first angle state, the valve core is driven to rotate until the fire hole thereon is blocked from the eternal fire air outlet channel and the first air outlet channel, and at the same time, the fire hole is connected to the second air outlet channel; when the knob rod is rotated counterclockwise from the original state to the second angle state, the valve core is driven to rotate until the fire hole thereon is blocked from the second air outlet channel, and the valve plate is in a position that blocks the connection between the fire hole and the first air outlet channel, and at the same time, the fire hole is connected to the eternal fire air outlet channel; when the knob rod continues to rotate counterclockwise from the second angle state to the third angle, the rotation of the knob rod no longer drives the valve core to rotate, and the rotation of the knob rod drives the valve plate to move in the direction of increasing the air outlet volume of the first air outlet channel, and the fire hole is connected to the eternal fire air outlet channel and the first air outlet channel at the same time.

[0004] This type of gas cock valve uses the valve stem to drive the valve core to rotate, achieving changes in gas output and regulating the fire intensity of the fire exhaust. The valve core and internal channel design of this gas cock valve are complex, requiring very high assembly requirements. At the same time, it cannot achieve automatic control.

[0005] There are also fire control systems on the market that can automatically control the temperature up and down, but they are purely electronic system controls. In the event of electronic system failure, the gas cannot be automatically shut off. The system must be powered off to shut off the gas, which poses a safety hazard.

[0006] Therefore, it is necessary for technicians in this field to design a gas cock valve with a simpler structure that can automatically control the fire of the upper and lower fire rows and can also manually close the main gas inlet. Summary of the Invention

[0007] The first technical problem to be solved by the present invention is to provide a gas cock valve with a more reasonable and simple structure design in view of the above-mentioned existing technical status, which makes it possible to automatically control the fire of the upper and lower fire exhausts.

[0008] The technical solution adopted by the present invention to solve the above technical problems is: a gas cock valve, including a valve body with an air inlet channel, a first air outlet channel and a second air outlet channel inside, a rotatable valve core is provided in the valve core cavity of the valve body, a ventilation cavity with an opening facing downward is provided at the lower part of the valve core, a fire hole connected to the ventilation cavity is provided on the side wall of the ventilation cavity, a valve stem for driving the valve core to rotate is passed through the valve body, and the valve stem maintains an upward movement trend by the action of a spring; it is characterized in that: a control valve installation cavity is also provided in the valve body, the control valve installation cavity and the valve core cavity are connected by a valve port, the air inlet channel is connected to the control valve installation cavity, and an electrically controlled self-priming When the electric self-priming valve loses power, the telescopic rod of the electric self-priming valve blocks the valve port under the action of the reset spring. When the electric self-priming valve is energized, the telescopic rod of the electric self-priming valve moves downward to open the valve port. A potentiometer is fixed to the upper part of the valve body. The rotor part of the potentiometer is mounted on the valve stem and can be driven to rotate by the valve stem to detect the direction and angle of rotation of the valve stem. In the initial state, the fire hole is blocked from the first air outlet channel and the second air outlet channel. After the valve stem drives the valve core to rotate clockwise by a certain angle, the fire hole is connected to the first air outlet channel. After the valve stem drives the valve core to rotate counterclockwise by an angle, the fire hole is connected to the second air outlet channel.

[0009] A further improvement is that a microswitch is fixed to the upper portion of the valve body, and a trigger disk is mounted on the valve stem, which rotates with it. In the initial state, the trigger disk does not trigger the microswitch. After the valve stem drives the valve core to rotate clockwise or counterclockwise through a certain angle, the trigger disk triggers the microswitch. The microswitch ensures that it functions as a master switch only when the valve stem is physically rotated, making it safer to use.

[0010] A further improvement is that there are two fire holes: a first fire hole for connecting to the first air outlet channel, and a second fire hole for connecting to the second air outlet channel, with the first and second fire holes spaced apart. When the valve stem drives the valve core to rotate clockwise through a certain angle, the first fire hole connects to the first air outlet channel, while the second fire hole is misaligned and blocked from the second air outlet channel. When the valve stem drives the valve core to rotate counterclockwise through a certain angle, the second fire hole connects to the second air outlet channel, while the first fire hole is misaligned and blocked from the first air outlet channel. The design of two fire holes facilitates more precise control and simplifies the internal passages of the valve body. Of course, only one fire hole is also possible.

[0011] Preferably, the peripheral wall of the trigger disk has a concave notch. In the initial state, the contacts of the microswitch are located in the notch, and the microswitch is in an off-circuit state. After the valve stem drives the trigger disk to rotate clockwise or counterclockwise through an angle, the contacts of the microswitch contact the peripheral surface of the trigger disk, and the microswitch is in an on-circuit state.

[0012] A further improvement is that the valve body comprises a valve seat and a valve cover fixed to the valve seat. The inner top surface of the valve cover is provided with a limiting groove and a limiting boss. A side-convex limiting post is fixed to the valve stem. When the valve stem is in its initial state, the limiting post maintains its tendency to engage the limiting groove. This design provides the gas valve with a child lock function, requiring the valve stem to be moved downward a certain distance before it can be rotated. The limiting boss cooperates with the limiting post to limit the maximum angle of left and right rotation of the valve stem. The potentiometer and microswitch are fixed to the valve cover, with the microswitch and trigger disk located below the potentiometer. The air inlet channel, first air outlet channel, second air outlet channel, valve core chamber, and control valve mounting chamber are all provided on the valve seat. This also facilitates assembly of the various components.

[0013] The second technical problem to be solved by the present invention is to provide an upper and lower fire grate control system with the above-mentioned gas cock valve, which can realize automatic control of the gas oven, in response to the above-mentioned existing technical status.

[0014] A control system for upper and lower fire rows with the above-mentioned gas cock valve is characterized in that it includes an upper fire row ignition device, a lower fire row ignition device, at least one temperature detector and a circuit control board, the upper fire row ignition device, the lower fire row ignition device and the temperature detector are all connected to the circuit control board, and the potentiometer, the micro switch and the electric self-priming valve are also connected to the circuit control board; the valve stem drives the inner rotor of the potentiometer to rotate clockwise or counterclockwise to send a signal to the circuit control board to distinguish and identify whether the upper fire row ignition device or the lower fire row ignition device starts ignition, and the circuit control board sends a signal to the electric self-priming valve, which is energized and connected to the gas source; the valve stem The trigger disk is driven to trigger the micro switch to send a signal to the circuit control board for ignition; the temperature detector is used to detect the temperature of the upper fire row or the lower fire row after combustion; when the temperature of the upper fire row or the lower fire row after combustion reaches the set value, the signal is transmitted to the circuit control board, and the circuit control board sends a signal to the electric self-priming valve, the electric self-priming valve loses power and cuts off the gas source; when the temperature of the upper fire row or the lower fire row after combustion is lower than the set value, the signal is transmitted to the circuit control board, the circuit control board sends a signal to control the upper fire row ignition device or the lower fire row ignition device to start ignition, the circuit control board sends a signal to the electric self-priming valve, the electric self-priming valve is energized and the gas source is connected.

[0015] This system uses a potentiometer to identify which oven ignition device activates by rotating it clockwise or counterclockwise. A microswitch provides additional safety, preventing ignition from occurring even when the valve stem is not rotated, should the potentiometer malfunction. The microswitch ensures that the ignition device activates only when the valve stem is physically rotated into position. The opening and closing of the electrically controlled self-priming valve determines gas supply connectivity, and combined with a temperature detector, provides heat preservation and temperature control. This differs significantly from traditional gas valves, which adjust the fire size by varying the gas volume. Importantly, even if electrical components such as the circuit control board fail, the gas supply can be shut off by rotating the valve stem, allowing for manual emergency shutoff, making it safer to use.

[0016] Preferably, the device further includes an upper fire row ignition switch and a lower fire row ignition switch, which are connected to the circuit control board. The valve stem drives the inner rotor of the potentiometer to rotate clockwise or counterclockwise to send a signal to the circuit control board to distinguish and identify the upper fire row ignition switch or the lower fire row ignition switch to start working. The upper fire row ignition switch is used to control the ignition of the upper fire row ignition device, and the lower fire row ignition switch is used to control the ignition of the lower fire row ignition device. In this solution, the potentiometer sends a signal to the ignition switch, and the ignition switch then sends a signal to the ignition device to control its ignition. This control method separates the switch from the ignition device.

[0017] To further ensure system safety, the system also includes an upper and lower fire row flame detection pin connected to the circuit control board. The upper fire row flame detection pin is used to detect whether there is a flame in the upper fire row, and the lower fire row flame detection pin is used to detect whether there is a flame in the lower fire row. If there is no flame, a signal is transmitted to the circuit control board, which sends a signal to the electric self-priming valve, causing the electric self-priming valve to lose power and cut off the gas supply. This effectively prevents the situation where ventilation continues even if ignition fails.

[0018] Alternatively, the upper and lower fire row ignition devices can utilize either an ignition needle or a glow plug. Each has its own advantages and disadvantages. Ignition needles are inexpensive, but their disadvantage is that the gas supply begins flowing immediately upon ignition. If the ignition fails initially, the increased gas flow can easily produce a popping sound. Glow plugs are more expensive, but their advantage is that the gas supply does not flow until a certain period of time has passed, ensuring effective ignition.

[0019] Preferably, the upper fire row ignition device is integrated with the upper fire row flame detection pin; and the lower fire row ignition device is integrated with the lower fire row flame detection pin. Integrating the ignition device and flame detection pin reduces wiring and reduces costs compared to using two separate components.

[0020] The second technical problem to be solved by the present invention is to provide another upper and lower fire exhaust control system with the above-mentioned gas cock valve that can realize automatic control of the gas oven in response to the above-mentioned existing technical status.

[0021] A control system for upper and lower fire rows with the above-mentioned gas cock valve is characterized in that it includes an upper fire row ignition device, a lower fire row ignition device, at least one temperature detector and a circuit control board. The upper fire row ignition device, the lower fire row ignition device and the temperature detector are all connected to the circuit control board, and the potentiometer and the electric self-priming valve are also connected to the circuit control board; the valve stem drives the inner rotor of the potentiometer to rotate clockwise or counterclockwise to send a signal to the circuit control board to distinguish and identify whether the upper fire row ignition device or the lower fire row ignition device starts ignition, and the circuit control board sends a signal to the electric self-priming valve. The valve sends a signal, the electric self-priming valve is energized, and the gas source is connected; the temperature detector is used to detect the temperature of the upper or lower fire row after combustion; when the temperature of the upper or lower fire row after combustion reaches the set value, the signal is transmitted to the circuit control board, and the circuit control board sends a signal to the electric self-priming valve, the electric self-priming valve loses power, and the gas source is cut off; when the temperature of the upper or lower fire row after combustion is lower than the set value, the signal is transmitted to the circuit control board, and the circuit control board sends a signal to control the upper fire row ignition device or the lower fire row ignition device to start ignition, the electric self-priming valve is energized, and the gas source is connected.

[0022] Compared to the previous solution, this solution lacks a micro switch, making it slightly less secure. This can be improved by programming the circuit control board to compensate for the lack of a micro switch.

[0023] Compared with the prior art, the advantages of the present invention are: the upper and lower fire grates can be distinguished and identified by the setting of the potentiometer, and compared with the traditional gas valve, there is no need for the complex design of the valve core and the internal channel and transmission structure of the valve body, and the overall structure of the gas cock valve is simpler; through the design of the electric self-priming valve, compared with the traditional safety solenoid valve, there is no need to move the valve stem downward to trigger the solenoid valve, and a signal can be given through the external circuit control board to control the working state of the electric self-priming valve and realize the on and off of the gas source, so that the gas valve makes it possible to realize the insulation temperature control function, that is, to provide the possibility of automatic control of the fire in the fire grate. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the three-dimensional structure of an embodiment of a gas cock valve;

[0025] Figure 2 1 is a cross-sectional view of a gas cock valve embodiment along the gas outlet channel (initial position);

[0026] Figure 3 1 is a cross-sectional view of a gas cock valve embodiment along the direction of the gas inlet passage (initial position);

[0027] Figure 4 1. It is a cross-sectional view of an embodiment of a gas cock valve along the direction of the gas outlet channel (the position where the first gas outlet channel is ventilated);

[0028] Figure 5 1. It is a cross-sectional view of an embodiment of a gas cock valve along the direction of the gas outlet channel (the position where the first gas outlet channel is ventilated);

[0029] Figure 6 1. It is a cross-sectional view of an embodiment of a gas cock valve along the direction of the gas outlet channel (the position where the second gas outlet channel is ventilated);

[0030] Figure 7 It is a three-dimensional exploded view of a gas cock valve embodiment;

[0031] Figure 8 This is a schematic diagram of the connection structure of the valve in the control system embodiment;

[0032] Figure 9 Schematic diagram of the working principle of the control system valve Figure 1 ;

[0033] Figure 10 Schematic diagram of the working principle of the control system valve Figure 2 . DETAILED DESCRIPTION

[0034] The present invention will be described in further detail below with reference to the accompanying drawings and embodiments.

[0035] like Figures 1 to 7 FIG. 1 is a preferred embodiment of the gas cock valve of the present invention.

[0036] A gas cock valve comprises a valve body 1 having an internal air inlet channel 1a, a first air outlet channel 1b and a second air outlet channel 1c. A rotatable valve core 2 is provided in a valve core cavity 111 of the valve body 1. A downwardly opening vent cavity 21 is provided at the lower portion of the valve core 2. A fire hole 22 communicating with the vent cavity 21 is provided on the side wall of the vent cavity 21. There are two fire holes 22, namely a first fire hole 221 for communicating with the first air outlet channel 1b and a second fire hole 222 for communicating with the second air outlet channel 1c. The first fire hole 221 and the second fire hole 222 are spaced apart from each other. A valve stem 3 for driving the valve core 2 to rotate is provided on the valve body 1. The valve stem 3 is maintained in an upward movement trend by the action of a spring 4.

[0037] A control valve installation cavity 112 is also provided in the valve body 1. The control valve installation cavity 112 is connected to the valve core cavity 111 through a valve port 113. The air inlet passage 1a is communicated with the control valve installation cavity 112. An electrically controlled self-priming valve 5 is installed at the lower part of the valve body 1. When the electrically controlled self-priming valve 5 loses power, the telescopic rod 51 of the electrically controlled self-priming valve 5 blocks the valve port 113 under the action of the reset spring 52. When the electrically controlled self-priming valve 5 is energized, the valve stem 3 moves downward to open the valve port 113. A micro switch 6 and a potentiometer 7 are fixed to the upper part of the valve body 1. The rotor part of the potentiometer 7 is mounted on the valve stem 3 and can be driven to rotate by the valve stem 3 to detect the direction and angle of rotation of the valve stem 3. The valve stem 3 is also mounted with a trigger disk 8 that can rotate with it.

[0038] In the initial state, the trigger disk 8 does not trigger the micro switch 6, and the fire hole 22 is blocked from the first gas outlet channel 1b and the second gas outlet channel 1c at the same time.

[0039] After the valve stem 3 drives the valve core 2 to rotate clockwise by a certain angle, the trigger disk 8 triggers the micro switch 6, the first fire hole 221 is connected to the first air outlet channel 1b, and the second fire hole 222 is misaligned with the second air outlet channel 1c and blocked.

[0040] After the valve stem 3 drives the valve core 2 to rotate counterclockwise by an angle, the trigger disk triggers the micro switch 6, the second fire hole 222 is connected to the second air outlet channel 1c, and the first fire hole 221 is misaligned with the first air outlet channel 1b and blocked.

[0041] There is a concave notch 81 on the peripheral wall of the trigger disk 8. In the initial state, the contact of the microswitch 6 is located in the notch 81, and the microswitch 6 is in the off-circuit state; after the valve stem 3 drives the trigger disk 8 to rotate clockwise or counterclockwise by an angle, the contact of the microswitch 6 contacts the peripheral surface of the trigger disk 8, and the microswitch 6 is in the on-circuit state.

[0042] The valve body 1 includes a valve seat 11 and a valve cover 12 fixed on the valve seat 11. The inner top surface of the valve cover 12 is provided with a limiting groove 121 and a limiting boss 122. A side-convex limiting column 31 is fixed on the valve stem 3. When the valve stem 3 is in the initial state, the limiting column 31 maintains the tendency to be stuck in the limiting groove 121. The limiting boss 122 cooperates with the limiting column 31 to limit the maximum angle of left and right rotation of the valve stem 3. The potentiometer 7 and the microswitch 6 are fixed on the valve cover 12. The microswitch 6 and the trigger disk 8 are located below the potentiometer 7. The air inlet channel 1a, the first air outlet channel 1b, the second air outlet channel 1c, the valve core cavity 111 and the control valve installation cavity 112 are all arranged on the valve seat 11.

[0043] The potentiometer 5 is a purchased part and can be purchased. The specific internal structure of the potentiometer is not shown in the drawing.

[0044] like Figures 8 and 9 The figure shows a preferred embodiment of the upper and lower fire bar control system of the present invention.

[0045] A control system for upper and lower fire rows of a gas cock valve having the aforementioned embodiment, wherein the first fire hole 221 and the first gas outlet channel 1b are connected to the upper fire row, and the second fire hole 222 and the second gas outlet channel 1c are connected to the lower fire row.

[0046] Specifically, it includes an upper fire row ignition switch 9a, a lower fire row ignition switch 9b, an upper fire row ignition device 13a, a lower fire row ignition device 13b, at least one temperature detector 14 and a circuit control board 10. The upper fire row ignition switch 9a, the lower fire row ignition switch 9b, the upper fire row ignition device 13a, the lower fire row ignition device 13b and the temperature detector 14 are all connected to the circuit control board 10, and the potentiometer 7, the micro switch 6 and the electric self-priming valve 5 are also connected to the circuit control board 10; the valve stem 3 drives the inner rotor of the potentiometer 7 to rotate clockwise or counterclockwise to send a signal to the circuit control board 10 to distinguish and identify whether the upper fire row ignition switch 9a or the lower fire row ignition switch 9b starts working. The circuit control board 10 also sends a signal to the electric self-priming valve 5, and the electric self-priming valve 5 is energized and connected to the gas source, and the corresponding upper fire row ignition device 13a is energized. a or the lower fire row ignition device 13b starts to ignite; the valve stem 3 drives the trigger disk 8 to trigger the microswitch 6 to power the upper fire row ignition switch 9a and / or the lower fire row ignition switch 9b; the temperature detector 14 is used to detect the temperature of the upper fire row or the lower fire row after combustion; when the temperature of the upper fire row or the lower fire row after combustion reaches the set value, the signal is transmitted to the circuit control board 10, the circuit control board 10 sends a signal to the electric self-priming valve 5, the electric self-priming valve 5 loses power and cuts off the gas source; when the temperature of the upper fire row or the lower fire row after combustion is lower than the set value, the signal is transmitted to the circuit control board 10, the circuit control board 10 sends a signal to the electric self-priming valve 5 and the upper fire row ignition switch 9a or the lower fire row ignition switch 9b, the upper fire row ignition device 13a or the lower fire row ignition device 13b starts to ignite, the electric self-priming valve 5 is energized, and the gas source is connected.

[0047] If there is only one temperature detector 14, it is placed next to the lower fire row ignition device 13b. If there are two temperature detectors 14, they are placed next to the upper fire row ignition device 13a and the lower fire row ignition device 13b respectively.

[0048] It also includes an upper fire row flame detection needle 15a and a lower fire row flame detection needle 15b connected to the circuit control board 10. The upper fire row flame detection needle 15a is used to detect whether there is a flame in the upper fire row, and the lower fire row flame detection needle 15b is used to detect whether there is a flame in the lower fire row. If there is no flame, a signal is transmitted to the circuit control board 10, and the circuit control board 10 sends a signal to the electric-controlled self-priming valve 5, and the electric-controlled self-priming valve 5 loses power and cuts off the gas source.

[0049] The upper fire row ignition device 13a and the lower fire row ignition device 13b adopt an ignition needle or ignition plug structure.

[0050] like Figure 8 As shown, the upper fire row ignition device 13a and the upper fire row flame detection needle 15a can be separately provided, and the lower fire row ignition device 13b and the lower fire row flame detection needle 15b can be separately provided.

[0051] like Figure 10As shown, the upper fire row ignition device 13a and the upper fire row flame detection needle 15a can also be integrated together to form a needle shape; the lower fire row ignition device 13b and the lower fire row flame detection needle 15b can also be integrated together to form a needle shape.

[0052] The working principle and process of the upper and lower fire row control system are as follows: Figure 9 shown.

[0053] Press down and rotate the valve stem 3 clockwise or counterclockwise to a set angle (e.g., 50 degrees). The valve stem 3 drives the trigger disk 8 to trigger the micro switch 6, which sends a signal to the circuit control board 10 to ignite. At the same time, the valve stem 3 drives the inner rotor of the potentiometer 7 to rotate clockwise or counterclockwise, sending a signal to the circuit control board 10 to distinguish and identify whether the upper fire row ignition switch 9a or the lower fire row ignition switch 9b starts working. After a certain delay (the upper fire row ignition device 13a and the lower fire row ignition device 13b use ignition needles), the corresponding upper fire row ignition device 13a or the lower fire row ignition device 13b starts to ignite. The circuit control board 10 also sends a signal to the electronically controlled self-priming valve 5, which is energized and connected to the gas source.

[0054] The temperature detector 14 detects the post-combustion temperature of the upper or lower fire bar. When the post-combustion temperature reaches a set value (e.g., 200°C), it transmits a signal to the circuit control board 10, which in turn sends a signal to the electrically controlled self-priming valve 5, de-energizing the valve 5 and shutting off the gas supply. When the post-combustion temperature of the upper or lower fire bar falls below the set value, it transmits a signal to the circuit control board 10, which in turn sends a signal to the electrically controlled self-priming valve 5 and the upper or lower fire bar ignition switch 9a or 9b. After a delay (the upper or lower fire bar ignition device 13a or 13b uses an ignition needle), the upper or lower fire bar ignition device 13a or 13b begins ignition, energizing the electrically controlled self-priming valve 5, opening valve port 113 and connecting the gas supply. This achieves the function of heat preservation and temperature control.

[0055] The upper fire row flame detection needle 15a is used to detect whether there is a flame in the upper fire row, and the lower fire row flame detection needle 15b is used to detect whether there is a flame in the lower fire row. If there is no flame, a signal is transmitted to the circuit control board 10, and the circuit control board 10 sends a signal to the electric control self-priming valve 5, which loses power to the electric control self-priming valve 5, sealing the valve port 113 and cutting off the gas supply. This provides a safety protection function.

[0056] If the electronic components are damaged and the gas source cannot be cut off normally, the valve stem 3 can be rotated to the initial position. The trigger disk 8 does not trigger the micro switch 6, and the fire hole 22 is blocked from the first gas outlet channel 1b and the second gas outlet channel 1c at the same time, which plays an emergency protection role.

[0057] It should be noted that in the description of this embodiment, the terms "front, rear", "left, right", "up, down", etc. indicating directions or positional relationships are all based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention. The terms "install", "connect", and "connected" should be understood in a broad sense. For example, they can be fixed connections, detachable connections, or integral connections; they can be directly connected, or indirectly connected through an intermediate medium, or they can be internal connections between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

Claims

1. A gas cock valve, comprising a valve body (1) having an air inlet passage (1a), a first air outlet passage (1b) and a second air outlet passage (1c) therein, a rotatable valve core (2) being provided in a valve core cavity (111) of the valve body (1), a vent cavity (21) opening downwardly being provided at the lower portion of the valve core (2), a fire hole (22) being provided on a side wall of the vent cavity (21) and communicating with the vent cavity (21), a valve stem (3) being provided on the valve body (1) for driving the valve core (2) to rotate, the valve stem (3) being maintained in an upward movement tendency by the action of a spring (4); and characterized in that: A control valve installation cavity (112) is further provided in the valve body (1), and the control valve installation cavity (112) is connected to the valve core cavity (111) via a valve port (113). The air inlet passage (1a) is communicated with the control valve installation cavity (112). An electrically controlled self-priming valve (5) is installed at the lower portion of the valve body (1). When the electrically controlled self-priming valve (5) loses power, the telescopic rod (51) of the electrically controlled self-priming valve (5) blocks the valve port (113) under the action of a return spring (52). When the electrically controlled self-priming valve (5) receives power, the telescopic rod (51) of the electrically controlled self-priming valve (5) moves downward to open the valve port (113). A potentiometer (7) is fixed to the upper portion of the valve body (1), and a rotor portion of the potentiometer (7) is sleeved on the valve stem (3) and can be driven to rotate by the valve stem (3) to detect the direction and angle of rotation of the valve stem (3). In the initial state, the fire hole (22) is blocked from the first air outlet channel (1b) and the second air outlet channel (1c); After the valve stem (3) drives the valve core (2) to rotate clockwise by a certain angle, the fire hole (22) is communicated with the first air outlet channel (1b); After the valve stem (3) drives the valve core (2) to rotate counterclockwise by an angle, the fire hole (22) is communicated with the second air outlet channel (1c).

2. The gas cock valve according to claim 1, characterized in that: A micro switch (6) is also fixed on the upper part of the valve body (1), and a trigger disk (8) that can rotate with the valve stem (3) is also mounted on the valve stem (3); in an initial state, the trigger disk (8) does not trigger the micro switch (6); after the valve stem (3) drives the valve core (2) to rotate clockwise or counterclockwise by a certain angle, the trigger disk (8) triggers the micro switch (6).

3. The gas cock valve according to claim 1 or 2, characterized in that: There are two fire holes (22), namely a first fire hole (221) for communicating with the first air outlet channel (1b), and a second fire hole (222) for communicating with the second air outlet channel (1c). The first fire hole (221) and the second fire hole (222) are arranged at intervals in the upper and lower parts. After the valve stem (3) drives the valve core (2) to rotate clockwise by a certain angle, the first fire hole (221) is connected to the first air outlet channel (1b), and the second fire hole (222) is misaligned and blocked from the second air outlet channel (1c); After the valve stem (3) drives the valve core (2) to rotate counterclockwise by an angle, the second fire hole (222) is connected to the second air outlet channel (1c), and the first fire hole (221) is misaligned and blocked from the first air outlet channel (1b).

4. The gas cock valve according to claim 2, characterized in that: The peripheral wall of the trigger disk (8) is provided with an inwardly concave notch (81). In an initial state, the contact of the micro switch (6) is located in the notch (81), and the micro switch (6) is in an off-circuit state. After the valve stem (3) drives the trigger disk (8) to rotate clockwise or counterclockwise by a certain angle, the contact of the micro switch (6) contacts the peripheral surface of the trigger disk (8), and the micro switch (6) is in an on-circuit state.

5. The gas cock valve according to claim 2, characterized in that: The valve body (1) comprises a valve seat (11) and a valve cover (12) fixed on the valve seat (11); the inner top surface of the valve cover (12) is provided with a limiting groove (121) and a limiting boss (122); a side-convex limiting column (31) is fixed on the valve stem (3); when the valve stem (3) is in an initial state, the limiting column (31) maintains a tendency to be stuck in the limiting groove (121); the limiting boss (122) cooperates with the limiting column (31) to limit the maximum angle of left and right rotation of the valve stem (3); the potentiometer (7) and the micro switch (6) are fixed on the valve cover (12); the micro switch (6) and the trigger disk (8) are located below the potentiometer (7); the air inlet channel (1a), the first air outlet channel (1b), the second air outlet channel (1c), the valve core cavity (111) and the control valve installation cavity (112) are all arranged on the valve seat (11).

6. A control system for upper and lower fire exhausts having the gas cock valve according to claim 2, characterized in that: The invention comprises an upper fire row ignition device (13a), a lower fire row ignition device (13b), at least one temperature detector (14) and a circuit control board (10), wherein the upper fire row ignition device (13a), the lower fire row ignition device (13b) and the temperature detector (14) are all connected to the circuit control board (10), and the potentiometer (7), the micro switch (6) and the electric self-priming valve (5) are also connected to the circuit control board (10); the valve stem (3) drives the inner rotor of the potentiometer (7) to rotate clockwise or counterclockwise to send a signal to the circuit control board (10) to distinguish and identify whether the upper fire row ignition device (13a) or the lower fire row ignition device (13b) starts ignition, and the circuit control board (10) sends a signal to the electric self-priming valve (5), and the electric self-priming valve (5) is energized and connected to the gas source; the valve stem ( 3) driving the trigger disk (8) to trigger the micro switch (6) to send a signal to the circuit control board (10) to ignite; the temperature detector (14) is used to detect the temperature of the upper fire row or the lower fire row after combustion; when the temperature of the upper fire row or the lower fire row after combustion reaches a set value, the signal is transmitted to the circuit control board (10), the circuit control board (10) sends a signal to the electric control self-priming valve (5), the electric control self-priming valve (5) loses power, and the gas source is cut off; when the temperature of the upper fire row or the lower fire row after combustion is lower than the set value, the signal is transmitted to the circuit control board (10), the circuit control board (10) sends a signal to control the upper fire row ignition device (13a) or the lower fire row ignition device (13b) to start ignition, the circuit control board (10) sends a signal to the electric control self-priming valve (5), the electric control self-priming valve (5) is powered, and the gas source is connected.

7. The upper and lower fire exhaust control system of the gas cock valve according to claim 6, characterized in that: The invention also includes an upper fire row ignition switch (9a) and a lower fire row ignition switch (9b), wherein the upper fire row ignition switch (9a) and the lower fire row ignition switch (9b) are connected to the circuit control board (10), and the valve stem (3) drives the inner rotor of the potentiometer (7) to rotate clockwise or counterclockwise to send a signal to the circuit control board (10) to distinguish and identify whether the upper fire row ignition switch (9a) or the lower fire row ignition switch (9b) starts working. The upper fire row ignition switch (9a) is used to control the ignition of the upper fire row ignition device (13a), and the lower fire row ignition switch (9b) is used to control the ignition of the lower fire row ignition device (13b).

8. The upper and lower fire exhaust control system of the gas cock valve according to claim 6, characterized in that: The invention also comprises an upper fire row flame detection needle (15a) and a lower fire row flame detection needle (15b) connected to the circuit control board (10). The upper fire row flame detection needle (15a) is used to detect whether there is a flame in the upper fire row, and the lower fire row flame detection needle (15b) is used to detect whether there is a flame in the lower fire row. If there is no flame, a signal is transmitted to the circuit control board (10). The circuit control board (10) sends a signal to the electric control self-priming valve (5), and the electric control self-priming valve (5) loses power, thereby cutting off the gas source.

9. The upper and lower fire exhaust control system of the gas cock valve according to claim 8, characterized in that: The upper fire row ignition device (13a) is integrated with the upper fire row flame detection needle (15a); and the lower fire row ignition device (13b) is integrated with the lower fire row flame detection needle (15b).

10. A control system for upper and lower fire exhausts having the gas cock valve according to claim 1, characterized in that: The invention comprises an upper fire row ignition device (13a), a lower fire row ignition device (13b), at least one temperature detector (14) and a circuit control board (10); the upper fire row ignition device (13a), the lower fire row ignition device (13b) and the temperature detector (14) are all connected to the circuit control board (10); the potentiometer (7) and the electric-controlled self-priming valve (5) are also connected to the circuit control board (10); the valve stem (3) drives the inner rotor of the potentiometer (7) to rotate clockwise or counterclockwise to send a signal to the circuit control board (10) to distinguish and identify whether the upper fire row ignition device (13a) or the lower fire row ignition device (13b) starts ignition, and the circuit control board (10) sends a signal to the electric-controlled self-priming valve (5) sends a signal, the electric-controlled self-priming valve (5) is energized, and the gas source is connected; the temperature detector (14) is used to detect the temperature of the upper fire row or the lower fire row after combustion; when the temperature of the upper fire row or the lower fire row after combustion reaches a set value, the signal is transmitted to the circuit control board (10), the circuit control board (10) sends a signal to the electric-controlled self-priming valve (5), the electric-controlled self-priming valve (5) loses power, and the gas source is cut off; when the temperature of the upper fire row or the lower fire row after combustion is lower than the set value, the signal is transmitted to the circuit control board (10), the circuit control board (10) sends a signal to control the upper fire row ignition device (13a) or the lower fire row ignition device (13b) to start ignition, the electric-controlled self-priming valve (5) is energized, and the gas source is connected.

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