CN114962716A - Gas plug valve and have upper and lower fire of this gas plug valve and arrange control system - Google Patents

Abstract

The invention relates to a gas plug valve, which comprises a valve body, wherein the valve body is internally provided with a gas inlet channel, a first gas outlet channel and a second gas outlet channel; the method is characterized in that: the valve body is also internally provided with a control valve installation cavity, the control valve installation cavity is connected with the valve core cavity through a valve port, the air inlet channel is communicated with the control valve installation cavity, the lower part of the valve body is provided with an electric control self-priming valve, the electric control self-priming valve is powered off and is blocked, the electric control self-priming valve is powered on, and the valve port is opened; the upper portion of valve body is fixed with the potentiometre, and rotor part suit in the potentiometre is on the valve rod. The gas plug valve provides possibility for realizing automatic control of fire discharge of upper and lower fires. The invention also relates to a control system for the upper fire grate and the lower fire grate.

Description

Gas plug valve and upper and lower fire grate control system with same

Technical Field

The invention relates to a gas plug valve with an upper fire grate and a lower fire grate control function, which is suitable for a gas oven.

Background

Some gas oven have two baking chambers that set up at an interval from top to bottom inside, are equipped with a fire row in every baking chamber respectively, like chinese utility model patent "a two-chamber gas oven that comprises guide plate" that patent number is ZL201220709936.8 (the bulletin number is CN203059420U) just discloses such a gas oven.

In order to realize the regulation of fire, the applicant applies Chinese utility model patent with patent number CN201821212627.3 (publication number CN208831808U) for this purpose, namely, a gas valve which can control two fire rows and has the function of ever-burning fire, and discloses the gas valve which comprises a valve body internally provided with an air inlet channel, a first air outlet channel and a second air outlet channel, wherein a rotatable valve core is arranged in the valve body, the lower part of the valve core is provided with a downward opening ventilation cavity, the side wall of the ventilation cavity is provided with a fire hole, a knob rod for driving the valve core to rotate is arranged on the valve body in a penetrating way, and the knob rod keeps the trend of moving upwards; the method is characterized in that: the valve body is also internally provided with an ever-burning-flame outlet channel and a valve plate for controlling the air outlet quantity of the first outlet channel, the valve plate can be driven to move by the rotation of a knob rod, the ever-burning-flame outlet channel and the first outlet channel are positioned on one side of the valve core, the second outlet channel is positioned on the other side of the valve core, and the air inlet channel is positioned at the bottom of the valve core; when the knob rod and the valve core are in the original state, the fire hole is simultaneously blocked with the first air outlet channel, the second air outlet channel and the ever-burning fire air outlet channel; when the knob rod rotates clockwise from the original state to a first angle state, the fire hole on the valve core is driven to rotate to be blocked by the ever-burning fire air outlet channel and the first air outlet channel, and meanwhile, the fire hole is communicated with the second air outlet channel; when the knob rod rotates anticlockwise to a second angle state from an original state, the valve element is driven to rotate until a fire hole on the valve element is blocked with a second air outlet channel, the valve plate is located at a position for blocking the communication between the fire hole and the first air outlet channel, and meanwhile, the fire hole is communicated with the ever-burning fire air outlet channel; in the process that the knob rod continues to rotate anticlockwise to the third angle from the second angle state, the valve element is not driven to rotate by the rotation of the knob rod, the valve plate is driven to move towards the direction enabling the air output of the first air outlet channel to be increased by the rotation of the knob rod, and the fire hole is communicated with the ever-burning fire air outlet channel and the first air outlet channel simultaneously.

The valve core is driven by the valve rod to rotate, the change of the gas output is realized, the fire discharge is regulated, and the valve core and the inner pore channel of the valve body of the gas plug valve are complex in design and have high assembly requirements. And at the same time, cannot realize automatic control.

At present, a fire control system capable of automatically controlling temperature up and down is also available in the market, but the fire control system is controlled by a pure electronic system, gas cannot be automatically closed under the condition that the electronic system fails, the gas cannot be closed until the system is powered off, and potential safety hazards exist.

Therefore, the design of the gas plug valve which has a simpler structure, can realize automatic control of the fire of the upper fire grate and the lower fire grate and can manually close the main gas inlet is a direction needing to be researched by the technical personnel in the field.

Disclosure of Invention

The first technical problem to be solved by the invention is to provide a gas plug valve with more reasonable and simple structural design aiming at the current situation of the prior art, and the gas plug valve provides possibility for realizing automatic control of fire discharging of upper and lower fires.

The technical scheme adopted by the invention for solving the technical problems is as follows: a gas plug valve comprises a valve body internally provided with a gas inlet channel, a first gas outlet channel and a second gas outlet channel, wherein a rotatable valve core is arranged in a valve core cavity of the valve body, the lower part of the valve core is provided with a vent cavity with a downward opening, the side wall of the vent cavity is provided with a fire hole communicated with the vent cavity, a valve rod for driving the valve core to rotate is arranged on the valve body in a penetrating way, and the valve rod keeps moving upwards under the action of a spring; the method is characterized in that: the valve body is also internally provided with a control valve installation cavity, the control valve installation cavity is connected with the valve core cavity through a valve port, the air inlet channel is communicated with the control valve installation cavity, the lower part of the valve body is provided with an electric control self-priming valve, the electric control self-priming valve is powered off, a telescopic rod of the electric control self-priming valve blocks the valve port under the action of a reset spring, the electric control self-priming valve is powered on, and the telescopic rod of the electric control self-priming valve moves downwards to open the valve port; a potentiometer is fixed on the upper part of the valve body, and a rotor part in the potentiometer is sleeved on the valve rod and can be driven by the valve rod to rotate so as to detect the rotating direction and angle of the valve rod; in an initial state, the fire holes are blocked from the first air outlet channel and the second air outlet channel; after the valve rod drives the valve core to rotate clockwise by a certain angle, the fire hole is communicated with the first air outlet channel; and after the valve rod drives the valve core to rotate anticlockwise by an angle, the fire hole is communicated with the second air outlet channel.

The valve is further improved, a microswitch is fixed on the upper part of the valve body, and a trigger disc which can rotate along with the valve rod is sleeved on the valve rod; in an initial state, the trigger plate does not trigger the microswitch, and after the valve rod drives the valve core to rotate clockwise or anticlockwise for a certain angle, the trigger plate triggers the microswitch. The setting of micro-gap switch ensures that only the actual physical position of valve rod is rotated in place, plays the master switch effect, uses safelyr.

In a further improvement, the two fire holes are respectively a first fire hole communicated with the first air outlet channel and a second fire hole communicated with the second air outlet channel, and the first fire hole and the second fire hole are arranged at intervals up and down; after the valve rod drives the valve core to rotate clockwise by a certain angle, the first fire hole is communicated with the first air outlet channel, and the second fire hole is staggered with the second air outlet channel and blocked; after the valve rod drives the valve core to rotate anticlockwise by an angle, the second fire hole is communicated with the second air outlet channel, and the first fire hole is staggered with the first air outlet channel to be blocked. The design of two fire holes is more convenient accurate control, can simplify the valve body inner passage. Of course, there may be only one fire hole.

Preferably, the peripheral wall of the trigger plate is provided with an inward notch, and in an initial state, a contact of the microswitch is positioned in the notch, and the microswitch is in an open circuit state; after the valve rod drives the trigger disc to rotate clockwise or anticlockwise for an angle, the contact of the micro switch is abutted to the peripheral surface of the trigger disc, and the micro switch is in a switch-on state.

The valve body comprises a valve seat and a valve cover fixed on the valve seat, wherein a limiting groove and a limiting boss are arranged on the inner top surface of the valve cover, and a laterally convex limiting column is fixed on the valve rod; when the knob rod is in an initial state, the limiting column keeps the trend of being clamped into the limiting groove; the design enables the gas valve to have a child lock function, namely the valve rod can be rotated only by moving down one position. The limiting boss is matched with the limiting column to limit the maximum angle of the valve rod in left-right rotation; the valve seat is characterized in that the potentiometer and the microswitch are fixed on the valve cover, the microswitch and the trigger plate are located below the potentiometer, and the air inlet channel, the first air outlet channel, the second air outlet channel, the valve core cavity and the control valve installation cavity are all arranged on the valve seat. And simultaneously, the components are convenient to assemble.

The second technical problem to be solved by the present invention is to provide an upper and lower fire grate control system with the gas plug valve, which can automatically control a gas oven, in view of the above-mentioned current state of the art.

The utility model provides a go up fire and arrange control system from top to bottom with aforementioned gas plug valve which characterized in that: the automatic fire extinguishing device comprises an upper fire grate ignition device, a lower fire grate ignition device, at least one temperature detector and a circuit control board, wherein the upper fire grate ignition device, the lower fire grate ignition device and the temperature detector are all connected with the circuit control board, and a potentiometer, a microswitch and an electric control self-priming valve are also connected with the circuit control board; the valve rod drives the inner rotor of the potentiometer to rotate clockwise or anticlockwise to send a signal to the circuit control board so as to distinguish and identify the ignition device of the upper fire grate or the ignition device of the lower fire grate to start ignition, the circuit control board sends a signal to the electric control self-priming valve, the electric control self-priming valve is electrified, and an air source is connected; the valve rod drives the trigger plate to trigger the microswitch to give a signal which can be ignited to the circuit control panel; the temperature detector detects the temperature of the upper fire grate or the lower fire grate after combustion; when the temperature of the upper fire grate or the lower fire grate after combustion reaches a set value, transmitting a signal to a circuit control board, sending a signal to an electric control self-suction valve by the circuit control board, powering off the electric control self-suction valve, and cutting off an air source; when the temperature of the upper fire grate or the lower fire grate after combustion is lower than a set value, a signal is transmitted to the circuit control board, the circuit control board sends a signal to control the ignition device of the upper fire grate or the ignition device of the lower fire grate to start ignition, the circuit control board sends a signal to the electric control self-priming valve, the electric control self-priming valve is electrified, and an air source is connected.

This system distinguishes that ignition of discernment oven through the potentiometre clockwise rotation, further increases the insurance through micro-gap switch's setting, avoids the potentiometre malfunctioning back, also ignites at the valve rod is not rotatory, and micro-gap switch's setting ensures that only the valve rod actual physical position is rotatory to the position, and ignition just plays a role. Whether an air source is communicated or not is determined by opening and closing the electric control self-priming valve, and a heat preservation and temperature control function is realized by combining a temperature detector, so that the realization mode is completely different from that of the traditional gas valve in which the fire intensity is adjusted by changing the gas quantity. Importantly, even if electrical elements such as a circuit control board and the like fail, the air source can be closed by rotating the valve rod, namely, the air source can be closed through manual emergency operation, and the use is safer.

Preferably, the ignition switch of the upper fire grate and the ignition switch of the lower fire grate are further included, the ignition switch of the upper fire grate and the ignition switch of the lower fire grate are connected with the circuit control board, the valve rod drives the inner rotor of the potentiometer to rotate clockwise or anticlockwise to send a signal to the circuit control board so as to distinguish and identify the ignition switch of the upper fire grate or the ignition switch of the lower fire grate to start working, the ignition switch of the upper fire grate is used for controlling the ignition of the ignition device of the upper fire grate, and the ignition switch of the lower fire grate is used for controlling the ignition of the ignition device of the lower fire grate. This scheme sends the signal for ignition switch through the potentiometre, and the rethread ignition switch sends the signal for ignition control its ignition, and this kind of control mode separately sets up switch and ignition.

For the security of further ensureing system's work, still include the last fire row flame probe and the fire row flame probe down that are connected with circuit control board, it arranges the flame probe and is used for surveying the last fire and arranges whether have flame, the fire is arranged down the flame probe and is used for surveying the fire and arranges whether have flame down, if no flame then transmit signal gives circuit control board, and circuit control board gives automatically controlled self-priming valve signals, and automatically controlled self-priming valve loses the electricity, cuts off the air supply. Effectively avoiding the situation that the ignition is not successful and the ventilation is continued.

Alternatively, the upper fire grate ignition device and the lower fire grate ignition device adopt an ignition needle or an ignition plug structure. The ignition needle or the ignition plug structure has the advantages and the disadvantages that the ignition needle is cheap, when the ignition needle is in the disadvantages, the air source is closed when the ignition is carried out, if the ignition is not carried out at the beginning, the increase of the gas quantity is easy to generate slamming crackles. The ignition plug is high in price, and has the advantage that an air source is communicated after the ignition is carried out for a certain time, so that the effective ignition is ensured.

Preferably, the ignition device of the upper fire grate is integrated with the flame detection needle of the upper fire grate; the lower fire grate ignition device and the lower fire grate flame detection needle are integrated together. The ignition device and the flame detection needle are integrated together, so that connecting lines can be reduced, and meanwhile, compared with the case that two independent components are adopted, the cost can be reduced by integrating the ignition device and the flame detection needle into one component.

The second technical problem to be solved by the present invention is to provide another upper and lower fire grate control system with the gas plug valve, which can automatically control a gas oven, in view of the above-mentioned current state of the art.

The utility model provides a go up fire and arrange control system from top to bottom with aforementioned gas plug valve which characterized in that: the automatic control device comprises an upper fire grate ignition device, a lower fire grate ignition device, at least one temperature detector and a circuit control board, wherein the upper fire grate ignition device, the lower fire grate ignition device and the temperature detector are all connected with the circuit control board, and a potentiometer and an electric control self-suction valve are also connected with the circuit control board; the valve rod drives the inner rotor of the potentiometer to rotate clockwise or anticlockwise to send a signal to the circuit control board so as to distinguish and identify the ignition device of the upper fire grate or the ignition device of the lower fire grate to start ignition, the circuit control board sends a signal to the electric control self-priming valve, the electric control self-priming valve is electrified, and an air source is connected; the temperature detector detects and detects the temperature of the upper fire grate or the lower fire grate after combustion; when the temperature of the upper fire grate or the lower fire grate after combustion reaches a set value, transmitting a signal to a circuit control board, sending a signal to an electric control self-suction valve by the circuit control board, powering off the electric control self-suction valve, and cutting off an air source; when the temperature of the upper fire grate or the lower fire grate after combustion is lower than a set value, a signal is transmitted to the circuit control board, the circuit control board sends out a signal to control the ignition device of the upper fire grate or the ignition device of the lower fire grate to start ignition, the electric control self-priming valve is electrified, and an air source is switched on.

Compared with the prior scheme, the scheme has the advantages that one microswitch is omitted, and the safety is slightly poor compared with the prior scheme. The safety can be improved by programming the circuit control board, and the defects caused by no micro switch are overcome.

Compared with the prior art, the invention has the advantages that: the potentiometer is arranged, so that the distinguishing and identification of the upper fire grate and the lower fire grate can be realized, and compared with the traditional gas valve, the design of a complicated valve core, a valve body internal channel and a transmission structure is not needed, and the overall structure of the gas plug valve is simpler; through the design of automatically controlled self-priming valve, compare with traditional safety solenoid valve, need not the valve rod and move down to trigger the solenoid valve, the operating condition of automatically controlled self-priming valve is controlled to the signal of accessible external circuit control panel, realizes the break-make of air supply whether for this gas valve provides probably for the realization of heat preservation control by temperature change function, promptly provides probably for the automatic control of the fire row intensity of a fire.

Drawings

FIG. 1 is a schematic perspective view of an embodiment of a gas plug valve;

FIG. 2 is a cross-sectional view of an embodiment of a gas plug valve taken along the direction of an outlet passage (initial position);

FIG. 3 is a cross-sectional view of an embodiment of a gas plug valve taken along the direction of the intake passage (initial position);

FIG. 4 is a cross-sectional view of an embodiment of the gas plug valve along the direction of the gas outlet channel (the position of the first gas outlet channel for ventilation);

FIG. 5 is a cross-sectional view of an embodiment of the gas plug valve taken along the direction of the outlet channel (the position of the first outlet channel being vented);

FIG. 6 is a cross-sectional view of an embodiment of the gas plug valve along the direction of the outlet channel (the position of the second outlet channel venting);

FIG. 7 is an exploded perspective view of the valve of the gas plug valve embodiment;

FIG. 8 is a schematic diagram of a valve connection configuration according to an embodiment of the control system;

FIG. 9 is a first schematic diagram of the operation of a valve according to an embodiment of the control system;

FIG. 10 is a second schematic diagram of the operation of a valve according to an embodiment of the control system.

Detailed Description

The invention is described in further detail below with reference to the accompanying examples.

Fig. 1 to 7 show a preferred embodiment of the gas cock valve of the present invention.

A gas plug valve comprises a valve body 1 internally provided with an air inlet channel 1a, a first air outlet channel 1b and a second air outlet channel 1c, wherein a rotatable valve core 2 is arranged in a valve core cavity 111 of the valve body 1, the lower part of the valve core 2 is provided with a downward vent cavity 21, the side wall of the vent cavity 21 is provided with two fire holes 22 communicated with the vent cavity 21, the two fire holes 22 are respectively a first fire hole 221 communicated with the first air outlet channel 1b and a second fire hole 222 communicated with the second air outlet channel 1c, and the first fire hole 221 and the second fire hole 222 are arranged at intervals up and down; a valve rod 3 for driving the valve core 2 to rotate penetrates through the valve body 1, and the valve rod 3 keeps moving upwards under the action of a spring 4.

A control valve installation cavity 112 is further arranged in the valve body 1, the control valve installation cavity 112 is connected with the valve core cavity 111 through a valve port 113, the air inlet channel 1a is communicated with the control valve installation cavity 112, an electric control self-priming valve 5 is installed at the lower part of the valve body 1, the electric control self-priming valve 5 is powered off, a telescopic rod 51 of the electric control self-priming valve 5 blocks the valve port 113 under the action of a reset spring 52, the electric control self-priming valve 5 is powered on, and the valve rod 3 moves downwards to open the valve port 113; the upper portion of valve body 1 is fixed with micro-gap switch 6 and potentiometre 7, rotor part suit among the potentiometre 7 is in on valve rod 3 and can be driven by valve rod 3 rotatory direction and angle in order to detect valve rod 3 rotatory, still the cover is equipped with on the valve rod 3 can be along with its rotatory trigger plate 8.

In the initial state, the trigger plate 8 does not trigger the microswitch 6, and the fire hole 22 is simultaneously blocked with the first air outlet channel 1b and the second air outlet channel 1 c.

After the valve rod 3 drives the valve core 2 to rotate clockwise by a certain angle, the trigger disc 8 triggers the micro switch 6, the first fire hole 221 is communicated with the first air outlet channel 1b, and the second fire hole 222 is staggered with the second air outlet channel 1c to be blocked.

After the valve rod 3 drives the valve core 2 to rotate counterclockwise by an angle, the trigger plate triggers the micro switch 6, the second fire hole 222 is communicated with the second air outlet channel 1c, and the first fire hole 221 is staggered with the first air outlet channel 1b to be blocked.

The peripheral wall of the trigger plate 8 is provided with an inwards concave notch 81, in an initial state, the contact of the micro switch 6 is positioned in the notch 81, and the micro switch 6 is in a broken circuit state; after the valve rod 3 drives the trigger plate 8 to rotate clockwise or anticlockwise for an angle, the contact of the micro switch 6 is abutted against the peripheral surface of the trigger plate 8, and the micro switch 6 is in a connection state.

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, and a laterally convex limiting column 31 is fixed on the valve rod 3; when the knob rod 3 is in an initial state, the limiting column 31 keeps the tendency of being clamped into the limiting groove 121; the limit boss 122 is matched with the limit column 31 to limit the maximum angle of the left-right rotation of the valve rod 3; the potentiometer 7 and the microswitch 6 are fixed on the valve cover 12, the microswitch 6 and the trigger disc 8 are positioned below the potentiometer 7, and 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.

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

As shown in FIGS. 8 to 9, a preferred embodiment of the fire grate control system of the present invention is shown.

A gas cock valve of the above embodiment has a fire hole 221 and a first gas outlet channel 1b communicating with a fire hole, and a second fire hole 222 and a second gas outlet channel 1c communicating with a fire hole.

The automatic control device comprises an upper fire grate ignition switch 9a, a lower fire grate ignition switch 9b, an upper fire grate ignition device 13a, a lower fire grate ignition device 13b, at least one temperature detector 14 and a circuit control board 10, wherein the upper fire grate ignition switch 9a, the lower fire grate ignition switch 9b, the upper fire grate ignition device 13a, the lower fire grate ignition device 13b and the temperature detector 14 are all connected with the circuit control board 10, and a potentiometer 7, a microswitch 6 and an electric control self-priming valve 5 are also connected with the circuit control board 10; the valve rod 3 drives the rotor in the potentiometer 7 to rotate clockwise or anticlockwise to send a signal to the circuit control board 10 so as to distinguish and identify that the ignition switch 9a of the upper fire row or the ignition switch 9b of the lower fire row starts to work, the circuit control board 10 simultaneously sends a signal to the electric control self-priming valve 5, the electric control self-priming valve 5 is electrified and is switched on an air source, and the corresponding ignition device 13a of the upper fire row or the ignition device 13b of the lower fire row starts to ignite; the valve rod 3 drives the trigger plate 8 to trigger the microswitch 6 to supply power to the ignition switch 9a of the upper fire grate and/or the ignition switch 9b of the lower fire grate; the temperature detector 14 detects the temperature of the upper fire row or the lower fire row after combustion; when the temperature of the upper fire grate or the lower fire grate reaches a set value after combustion, a signal is transmitted to the circuit control board 10, the circuit control board 10 sends a signal to the electric control self-suction valve 5, the electric control self-suction valve 5 is powered off, and an air source is cut off; when the temperature of the upper fire grate or the lower fire grate after combustion is lower than a set value, 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 ignition switch 9a of the upper fire grate or the ignition switch 9b of the lower fire grate, the ignition device 13a of the upper fire grate or the ignition device 13b of the lower fire grate starts to ignite, the electric control self-priming valve 5 is electrified, and an air source is switched on.

If there is one temperature detector 14, it is placed beside the lower fire row ignition device 13b, and if there are two temperature detectors 14, it is placed beside the upper fire row ignition device 13a and the lower fire row ignition device 13b, respectively.

Still include the last fire row flame probe 15a and the fire row flame probe 15b down that are connected with circuit control board 10, it arranges flame probe 15a and is used for surveying the last fire and arranges whether there is flame, the fire is arranged down flame probe 15b and is used for surveying the fire and arranges whether there is flame, if there is not flame then transmit signal gives circuit control board 10, and circuit control board 10 gives automatically controlled self-priming valve 5 signals, and automatically controlled self-priming valve 5 loses electricity, cuts off the air supply.

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

As shown in fig. 8, the ignition device 13a of the upper bank and the flame detection needle 15a of the upper bank may be provided separately, and the ignition device 13b of the lower bank and the flame detection needle 15b of the lower bank may be provided separately.

As shown in fig. 10, the ignition device 13a of the fire-fighting row and the flame detection needle 15a of the fire-fighting row can also be integrated together and have a needle shape; the lower fire row ignition device 13b and the lower fire row flame detection needle 15b can also be integrated together and are in the shape of a needle.

The working principle and the process of the upper fire grate and the lower fire grate control system are as follows, as shown in figure 9.

The valve rod 3 is pressed downwards and rotated clockwise or anticlockwise to a set angle (such as 50 degrees), and the valve rod 3 drives the trigger plate 8 to trigger the microswitch 6 to give a signal that the circuit control board 10 can be ignited; meanwhile, the valve rod 3 drives the rotor of the potentiometer 7 to rotate clockwise or anticlockwise to send a signal to the circuit control board 10 so as to distinguish and identify that the upper fire row ignition switch 9a or the lower fire row ignition switch 9b starts to work, after a certain time delay (the upper fire row ignition device 13a and the lower fire row ignition device 13b adopt 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 simultaneously sends a signal to the electric control self-priming valve 5, the electric control self-priming valve 5 is powered on, and an air source is switched on;

the temperature detector 14 can detect the temperature of the upper fire grate or the lower fire grate after combustion, when the temperature of the upper fire grate or the lower fire grate after combustion reaches a set value (such as 200 ℃), 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, the electric control self-priming valve 5 loses power, and an air source is cut off; when the temperature of the upper fire grate or the lower fire grate after combustion is lower than a set value, 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 ignition switch 9a of the upper fire grate or the ignition switch 9b of the lower fire grate, after a certain time delay (the ignition device 13a of the upper fire grate and the ignition device 13b of the lower fire grate adopt ignition needles), the ignition device 13a of the upper fire grate or the ignition device 13b of the lower fire grate starts to ignite, the electric control self-priming valve 5 is electrified, and the valve port 113 is opened to connect with an air source. Thereby realizing the functions of heat preservation and temperature control.

The upper fire row flame detection needle 15a is used for detecting whether the upper fire row has flame, the lower fire row flame detection needle 15b is used for detecting whether the lower fire row has flame, if no flame exists, 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, the electric control self-priming valve 5 is powered off, and the valve port 113 is plugged to cut off an air source. The safety protection function is achieved.

If the electronic element is damaged and the air source cannot be normally cut off, the valve rod 3 can be rotated to the initial position, the trigger plate 8 does not trigger the microswitch 6, and the fire hole 22 is simultaneously blocked with the first air outlet channel 1b and the second air outlet channel 1 c; the emergency protection function is realized.

It should be noted that in the description of the present embodiment, the terms "front, back", "left, right", "up, down", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for convenience of describing the present invention and simplifying the description, but does not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. The terms "mounted," "connected," and "coupled" are to be construed broadly and may, for example, be fixedly coupled, detachably coupled, or integrally coupled; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Claims (10)

1. A gas plug valve comprises a valve body (1) internally provided with an air inlet channel (1a), a first air outlet channel (1b) and a second air outlet channel (1c), wherein a rotatable valve core (2) is arranged in a valve core cavity (111) of the valve body (1), the lower part of the valve core (2) is provided with a vent cavity (21) with a downward opening, the side wall of the vent cavity (21) is provided with a fire hole (22) communicated with the vent cavity (21), a valve rod (3) for driving the valve core (2) to rotate penetrates through the valve body (1), and the valve rod (3) keeps moving upwards under the action of a spring (4); the method is characterized in that: the valve body (1) is also internally provided with a control valve installation cavity (112), the control valve installation cavity (112) is connected with the valve core cavity (111) through a valve port (113), the air inlet channel (1a) is communicated with the control valve installation cavity (112), the lower part of the valve body (1) is provided with an electric control self-suction valve (5), the electric control self-suction valve (5) is powered off, a telescopic rod (51) of the electric control self-suction valve (5) is sealed and blocked on the valve port (113) under the action of a reset spring (52), the electric control self-suction valve (5) is powered on, and the telescopic rod (51) of the electric control self-suction valve (5) moves downwards to open the valve port (113); a potentiometer (7) is fixed on the upper part of the valve body (1), and a rotor part in the potentiometer (7) is sleeved on the valve rod (3) and can be driven by the valve rod (3) to rotate so as to detect the rotating direction and angle of the valve rod (3);

in the initial state, the fire holes (22) are blocked from the first gas outlet channel (1b) and the second gas outlet channel (1 c);

after the valve rod (3) drives the valve core (2) to rotate clockwise for a certain angle, the fire hole (22) is communicated with the first air outlet channel (1 b);

after the valve rod (3) drives the valve core (2) to rotate anticlockwise by an angle, the fire hole (22) is communicated with the second air outlet channel (1 c).

2. The gas plug valve of claim 1, wherein: a microswitch (6) is fixed on the upper part of the valve body (1), and a trigger disc (8) capable of rotating along with the microswitch is sleeved on the valve rod (3); in an initial state, the trigger disc (8) does not trigger the microswitch (6), and after the valve rod (3) drives the valve core (2) to rotate clockwise or anticlockwise for a certain angle, the trigger disc (8) triggers the microswitch (6).

3. The gas plug valve according to claim 1 or 2, characterized in that: the two fire holes (22) are respectively a first fire hole (221) communicated with the first gas outlet channel (1b) and a second fire hole (222) communicated with the second gas outlet channel (1c), and the first fire hole (221) and the second fire hole (222) are arranged at intervals up and down;

after the valve rod (3) drives the valve core (2) to rotate clockwise for a certain angle, the first fire hole (221) is communicated with the first air outlet channel (1b), and the second fire hole (222) is staggered with the second air outlet channel (1c) to be blocked;

after the valve rod (3) drives the valve core (2) to rotate anticlockwise by an angle, the second fire hole (222) is communicated with the second air outlet channel (1c), and the first fire hole (221) and the first air outlet channel (1b) are staggered and blocked.

4. The gas plug valve of claim 2, wherein: the peripheral wall of the trigger plate (8) is provided with an inwards concave notch (81), in an initial state, a contact of the micro switch (6) is positioned in the notch (81), and the micro switch (6) is in a broken circuit state; after the valve rod (3) drives the trigger plate (8) to rotate clockwise or anticlockwise for an angle, the contact of the microswitch (6) is abutted against the peripheral surface of the trigger plate (8), and the microswitch (6) is in a switch-on state.

5. The gas plug valve of claim 2, wherein: 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), and a laterally convex limiting column (31) is fixed on the valve rod (3); when the knob rod (3) is in an initial state, the limiting column (31) keeps the trend of being clamped into the limiting groove (121); the limiting boss (122) is matched with the limiting column (31) to limit the maximum angle of the left-right rotation of the valve rod (3); the novel gas valve is characterized in that the potentiometer (7) and the microswitch (6) are fixed on the valve cover (12), the microswitch (6) and the trigger disc (8) are located below the potentiometer (7), and the gas inlet channel (1a), the first gas outlet channel (1b), the second gas outlet channel (1c), the valve core cavity (111) and the control valve installation cavity (112) are all arranged on the valve seat (11).

6. An upper and lower fire grate control system with the gas plug valve of claim 2, characterized in that: the automatic control device comprises an upper fire grate ignition device (13a), a lower fire grate ignition device (13b), at least one temperature detector (14) and a circuit control board (10), wherein the upper fire grate ignition device (13a), the lower fire grate ignition device (13b) and the temperature detector (14) are all connected with the circuit control board (10), and a potentiometer (7), a microswitch (6) and an electric control self-priming valve (5) are also connected with the circuit control board (10); the valve rod (3) drives an inner rotor of the potentiometer (7) to rotate clockwise or anticlockwise to send a signal to the circuit control board (10) so as to distinguish and identify an upper fire row ignition device (13a) or a 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 on, and an air source is switched on; the valve rod (3) drives the trigger plate (8) to trigger the microswitch (6) to give a signal which can be ignited to the circuit control board (10); the temperature detector detects (14) the temperature after combustion of the upper fire row or the lower fire row; when the temperature of the upper fire grate or the lower fire grate after combustion reaches a set value, a signal is transmitted to the circuit control board (10), the circuit control board (10) sends a signal to the electric control self-suction valve (5), the electric control self-suction valve (5) is powered off, and an air source is cut off; when the temperature of the upper fire grate or the lower fire grate after combustion is lower than a set value, a signal is transmitted to the circuit control board (10), the circuit control board (10) sends a signal to control the ignition device (13a) of the upper fire grate or the ignition device (13b) of the lower fire grate 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 electrified, and an air source is switched on.

7. The gas plug valve's row of getting on and off fire control system according to claim 6 characterized in that: still include fire row's ignition switch (9a), fire row's ignition switch (9b) down, fire row's ignition switch (9a), fire row's ignition switch (9b) down and circuit control board (10) are connected, valve rod (3) drive potentiometre (7) inner rotor clockwise or anticlockwise rotation give circuit control board (10) signals in order to distinguish discernment fire row's ignition switch (9a) or fire row's ignition switch (9b) start work down, fire row's ignition switch (9a) are used for controlling fire row's ignition (13a) and ignite, fire row's ignition switch (9b) are arranged for controlling fire row's ignition (13b) and ignite down.

8. The gas plug valve's row of getting on and off fire control system according to claim 6 characterized in that: still include the last fire row flame probe (15a) of being connected with circuit control board (10) and arrange flame probe (15b) down, it arranges flame probe (15a) and is used for surveying the last fire and arranges whether there is flame to go up the fire, arrange flame probe (15b) down and be used for surveying down the fire and arrange whether there is flame, if no flame then transmit signal for circuit control board (10), circuit control board (10) are for automatically controlled self-priming valve (5) signals, and automatically controlled self-priming valve (5) loses electricity, cuts off the air supply.

9. The gas plug valve's row of getting on and off fire control system according to claim 6 characterized in that: the ignition device (13a) of the upper fire bank is integrated with the flame detection needle (15a) of the upper fire bank; the lower fire row ignition device (13b) and the lower fire row flame detection needle (15b) are integrated together.

10. An upper and lower fire grate control system with the gas plug valve of claim 1, characterized in that: the automatic control system comprises an upper fire grate ignition device (13a), a lower fire grate ignition device (13b), at least one temperature detector (14) and a circuit control board (10), wherein the upper fire grate ignition device (13a), the lower fire grate ignition device (13b) and the temperature detector (14) are all connected with the circuit control board (10), and a potentiometer (7) and an electric control self-suction valve (5) are also connected with the circuit control board (10); the valve rod (3) drives an inner rotor of the potentiometer (7) to rotate clockwise or anticlockwise to send a signal to the circuit control board (10) so as to distinguish and identify an upper fire row ignition device (13a) or a 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 electrified, and an air source is switched on; the temperature detector detects (14) the temperature after combustion of the upper fire row or the lower fire row; when the temperature of the upper fire grate or the lower fire grate after combustion reaches a set value, a signal is transmitted to the circuit control board (10), the circuit control board (10) sends a signal to the electric control self-suction valve (5), the electric control self-suction valve (5) is powered off, and an air source is cut off; when the temperature of the upper fire grate or the lower fire grate after combustion is lower than a set value, a signal is transmitted to the circuit control board (10), the circuit control board (10) sends out a signal to control the ignition device (13a) of the upper fire grate or the ignition device (13b) of the lower fire grate to start ignition, the electric control self-suction valve (5) is electrified, and an air source is connected.

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