阅读说明：本技术 带防干烧功能的燃气组合阀 (Gas combination valve with dry burning prevention function ) 是由 李华登 于 2019-10-28 设计创作，主要内容包括：本发明公开了一种带防干烧功能的燃气组合阀,包括：进气通道、出气通道、热力膨胀阀组件、熄火保护开关阀；热力膨胀阀组件包括膨胀阀阀体、膨胀阀阀芯、及设置在被加热物上的感温包,膨胀阀阀体内设有膨胀阀阀腔,感温包内的介质受热膨胀时能够驱动膨胀阀阀芯移动,熄火保护开关阀在燃气燃烧器火焰熄灭时关闭进气通道或出气通道,当被加热物出现干烧时,并达到一定温度时,感温包内的介质驱动膨胀阀阀芯移动至关闭热力膨胀阀组件的位置,以切断气源,熄灭火焰,防止事故的发生；同时熄火保护开关阀在火焰熄灭后切断气源,可避免被加热物及感温包温度降低后热力膨胀阀组件打开气源而造成燃气泄漏,进一步提高燃气设备使用的安全性。(The invention discloses a gas combination valve with an anti-dry burning function, which comprises: the gas inlet channel, the gas outlet channel, the thermal expansion valve component and the flameout protection switch valve are arranged on the gas inlet channel; the thermostatic expansion valve assembly comprises an expansion valve body, an expansion valve spool and a temperature sensing bulb arranged on a heated object, wherein an expansion valve cavity is arranged in the expansion valve body, a medium in the temperature sensing bulb can drive the expansion valve spool to move when being heated and expanded, the flameout protection switch valve closes an air inlet channel or an air outlet channel when flame of the gas burner is extinguished, and when the heated object is burnt dry and reaches a certain temperature, the medium in the temperature sensing bulb drives the expansion valve spool to move to a position for closing the thermostatic expansion valve assembly so as to cut off an air source and extinguish the flame, thereby preventing accidents; meanwhile, the flameout protection switch valve cuts off the gas source after the flame is extinguished, so that the gas leakage caused by the gas source opened by the thermal expansion valve component after the temperature of the heated object and the temperature sensing bulb is reduced can be avoided, and the use safety of the gas equipment is further improved.)

1. Gas combination valve of dry combustion method function is prevented in area, its characterized in that includes:

an intake passage (11);

an outlet channel (12);

the heating power expansion valve assembly (2), the heating power expansion valve assembly (2) includes an expansion valve body (22), an expansion valve spool (23) and a temperature sensing bulb (21) arranged on a heated object, an expansion valve cavity (24) connected with an air inlet channel (11) or an air outlet channel (12) is arranged in the expansion valve body (22), the expansion valve spool (23) is arranged in the expansion valve cavity (24), and a medium in the temperature sensing bulb (21) can drive the expansion valve spool (23) to move when being heated and expanded;

a flameout protection switch valve which can be connected with a flameout protection control assembly of the gas equipment and closes the gas inlet channel (11) or the gas outlet channel (12) when the flame of the gas burner is extinguished.

2. The gas combination valve with dry burning prevention function according to claim 1,

the expansion valve core (23) comprises a plugging piece (231) which is arranged in the expansion valve cavity (24) in a sliding mode and can plug the expansion valve cavity (24), a driving cylinder (232) and a piston piece (233) which is in sliding fit with the driving cylinder (232) are arranged on the plugging piece (231), the piston piece (233) is fixedly connected with the expansion valve body (22), the temperature sensing bulb (21) is communicated into the driving cylinder (232), and a medium in the temperature sensing bulb (21) can push the driving cylinder (232) and the plugging piece (231) to move after being heated and expanded.

3. The gas combination valve with dry burning prevention function according to claim 2,

the bulb (21) is connected to the piston part (233) via a connecting tube (211) and communicates through the piston part (233) into a drive cylinder (232).

4. The gas combination valve with dry burning prevention function according to claim 2,

a compression spring (234) is arranged between the blocking piece (231) and the expansion valve body (22), and the compression spring (234) can provide an elastic force for driving the blocking piece (231) to the position for blocking the expansion valve cavity (24) for the blocking piece (231).

5. The gas combination valve with dry burning prevention function according to claim 2,

a step structure (241) is arranged in the expansion valve cavity (24), and the plugging piece (231) can move to be matched with the step structure (241) to plug the expansion valve cavity (24).

6. The gas combination valve with dry burning prevention function according to claim 2,

the lower end of the blocking piece (231) is provided with a guide post (235), and a guide hole (242) matched with the guide post (235) is arranged in the expansion valve cavity (24).

7. The gas combination valve with dry burning prevention function according to claim 1,

the flameout protection switching valve comprises an electromagnetic valve (31) arranged on the air inlet channel (11).

8. The gas combination valve with dry burning prevention function according to claim 1,

the gas flow control valve assembly (4) is further included, and the gas flow control valve assembly (4) can control the gas flow between the gas inlet channel (11) and the gas outlet channel (12).

9. The gas combination valve with dry burning prevention function according to claim 8,

the fuel gas flow control valve assembly (4) comprises a flow control valve body (41) and a valve core (42) arranged in the flow control valve body (41).

10. The gas combination valve with dry burning prevention function according to claim 9,

the flameout protection switch valve comprises an electromagnetic valve (31), a long valve cavity is arranged in a flow control valve body (41), a valve core (42) is arranged at the front end of the long valve cavity, the electromagnetic valve (31) is arranged at the rear end of the long valve cavity, an air inlet (431) is arranged in the middle of the long valve cavity, the electromagnetic valve (31) can cut off the communication state between the air inlet (431) and the front end of the long valve cavity, a thermal expansion valve component (2) comprises an expansion valve body (22) arranged at the air inlet (431) and an expansion valve core (23) arranged in the expansion valve body (22), an air inlet channel (11) is arranged on the expansion valve body (22), the expansion valve core (23) can cut off the communication state between the air inlet channel (11) and the air inlet (431), and an air outlet channel (12) is arranged on one side of the flow control valve body (41), the valve core (42) can control the outlet air flow of the outlet air channel (12).

Technical Field

The invention relates to the field of gas equipment, in particular to a gas combination valve with an anti-dry-burning function.

Background

At present, gas equipment such as gas cookers or gas water heaters is commonly used, in order to improve the safety of the use of the gas equipment, the gas equipment is basically provided with a flameout protection control assembly, and the function of closing a gas channel in flameout is realized through a thermocouple or a probe and the like.

Disclosure of Invention

The invention aims to solve at least one technical problem in the prior art and provides a gas combination valve with an anti-dry heating function.

The technical scheme adopted by the invention for solving the technical problems is as follows:

a gas combination valve with dry burning prevention function comprises: the gas inlet channel, the gas outlet channel, the thermal expansion valve component and the flameout protection switch valve are arranged on the gas inlet channel; the thermal expansion valve assembly comprises an expansion valve body, an expansion valve spool and a temperature sensing bulb arranged on a heated object, an expansion valve cavity connected with an air inlet channel or an air outlet channel is arranged in the expansion valve body, the expansion valve spool is movably arranged in the expansion valve cavity, a medium in the temperature sensing bulb can drive the expansion valve spool to move when heated and expanded, and the flameout protection switch valve can be connected with a flameout protection control assembly of the gas equipment and closes the air inlet channel or the air outlet channel when flame of a gas burner is extinguished.

One of the above technical solutions has at least one of the following advantages or beneficial effects: when the heated objects (such as a cooker and a heating water pipe of a water heater) are burnt dry, when the heated objects and the temperature sensing bulb reach a certain temperature, the medium in the temperature sensing bulb drives the valve core of the expansion valve to move to the position for closing the thermal expansion valve component, so that the air inlet channel or the air outlet channel is closed, the air source is cut off, flames are extinguished, and accidents are prevented; meanwhile, the flameout protection switch valve also closes the gas inlet channel or the gas outlet channel to cut off the gas source after the flame is extinguished, so that the gas leakage caused by the gas source opening of the thermal expansion valve component after the temperature of the heated object and the temperature sensing bulb is reduced (medium shrinkage) can be avoided, and the use safety of the gas equipment is further improved.

In some embodiments, the valve element of the expansion valve comprises a plugging piece which is slidably disposed in a valve cavity of the expansion valve and can plug the valve cavity of the expansion valve, a driving cylinder and a piston piece which is slidably matched with the driving cylinder are disposed on the plugging piece, the piston piece is fixedly connected with the valve body of the expansion valve, the thermal bulb is communicated to the driving cylinder, and a medium in the thermal bulb expands when heated to push the driving cylinder and the plugging piece to move, so that the expansion driving function is achieved, and the structure is compact.

In some embodiments, the thermal bulb is connected to the piston member through a connecting pipe and communicated into the driving cylinder through the piston member, so that the medium in the thermal bulb is communicated into the cylinder body, and the structural layout is reasonable.

In some embodiments, a compression spring is disposed between the plugging member and the expansion valve body, and the compression spring can provide an elastic force for the plugging member to drive the plugging member to a position for plugging the expansion valve cavity, so as to assist the plugging member in plugging the expansion valve cavity, so as to maintain a good closing performance of the expansion valve cavity, and ensure a normal dry-burning prevention function.

In some embodiments, a step structure is arranged in the expansion valve chamber, and the plugging piece can move to be matched with the step structure to plug the expansion valve chamber, so that the expansion valve chamber has better sealing performance.

In some embodiments, the lower end of the blocking piece is provided with a guide post, and the expansion valve cavity is internally provided with a guide hole matched with the guide post, so as to ensure the moving precision of the blocking piece and ensure the better closing performance of the blocking piece.

In some specific embodiments, the flameout protection switching valve includes a solenoid valve disposed on the air inlet passage, and the solenoid valve closes the air inlet passage when the flame of the gas burner is extinguished, thereby implementing flameout protection.

In some specific embodiments, the gas flow control valve assembly is further included, and the gas flow control valve assembly can control the gas flow between the gas inlet channel and the gas outlet channel, so that the flame size is adjusted, the thermal expansion valve, the flameout protection switch valve and the gas flow control valve are integrated, and the structural compactness is improved.

In some embodiments, the gas flow control valve assembly comprises a flow control valve body and a valve core arranged in the flow control valve body, the flameout protection switch valve comprises a solenoid valve, an elongated valve cavity is arranged in the flow control valve body, the valve core is arranged at the front end of the elongated valve cavity, the solenoid valve is arranged at the rear end of the elongated valve cavity, an air inlet is arranged in the middle of the elongated valve cavity, the solenoid valve can cut off the communication state between the air inlet and the front end of the elongated valve cavity, the thermostatic expansion valve assembly comprises an expansion valve body arranged at the air inlet and an expansion valve core arranged in the expansion valve body, the air inlet channel is arranged on the expansion valve body, the expansion valve core can cut off the communication state between the air inlet channel and the air inlet, and the air outlet channel is arranged at one side of the front end of the flow control valve, the valve core can control the air outlet flow of the air outlet channel, the thermostatic expansion valve, the electromagnetic valve, the air inlet channel and the air outlet channel are integrated into a whole by utilizing the flow control valve body, the structure is compact and reasonable, and the maintenance and debugging are convenient.

In some embodiments, the electromagnetic valve is disposed at the rear end of the flow control valve body, the valve core is disposed at the front end of the flow control valve body, the thermal expansion valve assembly is disposed at one side of the flow control valve body, and the air outlet channel is disposed at the other side of the flow control valve body, so that the installation space is fully utilized, the space occupied by the combination valve is reduced, and the installation and maintenance are convenient.

Drawings

The invention is further described below with reference to the accompanying drawings and examples;

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic cross-sectional view of an embodiment of the present invention;

FIG. 3 is an exploded view of an embodiment of the present invention.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.