Portable gas stove and valve thereof

Abstract

The utility model provides a portable gas stove and a valve thereof, the portable gas stove comprises a stove head and the valve, the valve comprises a valve body and a safety valve core, and the valve body is provided with a gas inlet and a gas outlet interface; an overpressure protection cavity communicated with the air inlet and the air outlet connector is formed in the valve body. The safety valve core is movably arranged in the overpressure protection chamber between an opening position and a closing position along a preset axis; the safety valve element is arranged to be in an opening position when the pressure of the overpressure protection cavity is smaller than a preset value and to be switched to a closing position when the pressure is larger than the preset value. The air inlet is communicated with the air outlet connector when the safety valve element is in the opening position. And the valve is disconnected with the air outlet connector at the closing position. And the air outlet interface is communicated with the furnace end. According to the valve of the portable gas stove, when the pressure of the gas supply path exceeds a preset value, the safety valve element can be driven to be automatically closed, the purposes of flameout and gas cut-off are achieved, and the use safety of the portable gas stove is guaranteed.

Description

Technical Field

[0001] The utility model relates to a cartridge furnace and a valve thereof. Background Art

[0002] A cartridge stove, also known as a cartridge burner, refers to a burner that uses a disposable fuel cylinder whose butane content is not less than 95%, and the cylinder is connected to the burner by a snap-in method to supply gas.

[0003] According to relevant regulations, when a cassette stove is in normal use, the pressure on the high-pressure side of the gas circuit of the cassette stove can be cut off and the flame can be extinguished within the range of 0.4MPa to 0.7MPa. The gas cylinder of an existing cassette stove is usually fixed to the furnace body by a magnetic suction valve. In order to meet the above regulations, the magnetic suction force of the gas cylinder and the furnace valve must be set to be lower than 0.7MPa, so that the gas cylinder can automatically be disconnected from the furnace body (i.e., the bottle can be detached) in the event of overpressure, thereby cutting off the gas and extinguishing the flame. However, since the magnetic suction force is lower than 0.7MPa, the gas cylinder may not be able to be sucked during operations such as moving and shaking during use, and the bottle may accidentally fall off during normal use (such as carrying and shaking), affecting the user experience. Utility Model Content

[0004] The utility model aims to provide a valve for a cartridge furnace, comprising a valve body, the valve body being provided with an air inlet for inputting fuel from a gas supply bottle and an air outlet interface for outputting the fuel from the gas supply bottle to the furnace body; the valve also comprising a safety valve core; an overpressure protection chamber connected to the air inlet and the air outlet interface respectively is provided within the valve body; the safety valve core is movably installed in the overpressure protection chamber along a predetermined axis between an open position and a closed position; the safety valve core is configured to be in an open position when the pressure in the overpressure protection chamber is less than a preset value, and to switch to a closed position when the pressure in the overpressure protection chamber is greater than a preset value; the air inlet is connected to the air outlet interface when the safety valve core is in the open position; the air inlet is disconnected from the air outlet interface when the safety valve core is in the closed position.

[0005] Another object of the utility model is to provide a cartridge stove, comprising a stove head and the above-mentioned valve; the gas outlet interface is communicated with the stove head.

[0006] When the gas supply line pressure of the cartridge furnace of the utility model exceeds a preset value (such as 0.7MPa), the valve of the cartridge furnace can drive the safety valve core to automatically close, thereby achieving the purpose of flameout and gas cut-off. When this overpressure protection method is adopted, the magnetic attraction setting of the gas cylinder can be increased as needed, which can not only ensure the safety of the cartridge furnace, but also improve the stability of the gas cylinder installation, thus meeting the needs of users. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figures 1 to 3 It is a schematic diagram of the structure of the valve of the utility model at different angles.

[0008] Figure 4 for Figure 3 Section view of the AA plane

[0009] Figure 5 for Figure 3 Cross-sectional view of the middle BB plane

[0010] Figure 6 for Figure 5 The structural schematic diagram of the safety valve core and spring is omitted.

[0011] Figure 7 For Figure 5 Structural diagram of the safety valve core in the closed position.

[0012] Figure 8 for Figure 7 The structural schematic diagram of the safety valve core and spring is omitted.

[0013] Fig. 9 It is a sectional exploded view of the utility model.

[0014] Figures 10 to 12 It is a schematic diagram of the structure of the valve body of the utility model at different angles. DETAILED DESCRIPTION

[0015] The present application scheme is further described as follows in conjunction with the accompanying drawings:

[0016] Embodiment 1

[0017] See attached Figure 1-12 A valve for a cartridge furnace comprises a valve body 1 and a safety valve core 2. The valve body 1 is provided with an air inlet 111 for inputting fuel from a gas supply bottle and an air outlet interface 15 for outputting the fuel from the gas supply bottle to the furnace body.

[0018] An overpressure protection chamber 12 is provided in the valve body 1 and is connected with an air inlet 111 and an air outlet interface 15 respectively; the safety valve core 2 is installed in the overpressure protection chamber 12 so as to be movably installed between an open position and a closed position along a predetermined axis L1; the safety valve core 2 is configured to be in an open position when the pressure in the overpressure protection chamber 12 is less than a preset value, and to switch to a closed position when the pressure in the overpressure protection chamber 12 is greater than a preset value; the air inlet 111 is connected with the air outlet interface 15 when the safety valve core 2 is in the open position; the air inlet 111 is disconnected from the air outlet interface 15 when the safety valve core 2 is in the closed position.

[0019] When the gas supply line pressure of the cartridge furnace valve of the technical solution exceeds a preset value (such as 0.7MPa), the safety valve core 2 can be driven to automatically close to achieve the purpose of flameout and gas cut-off. When this overpressure protection method is adopted, the magnetic attraction setting of the gas cylinder can be increased as needed, which can not only ensure the safety of the cartridge furnace, but also improve the stability of the gas cylinder installation to meet user needs.

[0020] The axis of the safety valve core 2 is on the predetermined axis L1; the outer wall of the safety valve core 2 is provided with a front elastic sealing ring 3 and a rear elastic sealing ring 4 that move with the safety valve core 2, and the front elastic sealing ring 3 and the rear elastic sealing ring 4 are distributed at intervals along the axis of the safety valve core 2, wherein along the direction of movement of the safety valve core 2 from the open position to the closed position, the front elastic sealing ring 3 is located in front of the rear elastic sealing ring 4.

[0021] The front elastic sealing ring 3 and the rear elastic sealing ring 4 are both in contact with the inner wall of the overpressure protection chamber 12; so that the gap between the front elastic sealing ring 3 and the rear elastic sealing ring 4 from the outer wall of the safety valve core 2 to the inner wall of the overpressure protection chamber 12 is closed by the front elastic sealing ring 3 and the rear elastic sealing ring 4; and the front elastic sealing ring 3 and the rear elastic sealing ring 4 are always in contact with the inner wall of the overpressure protection chamber 12 when the safety valve core 2 moves along the predetermined axis L1.

[0022] A protection chamber inlet 121 and a protection chamber outlet 122 are provided on the inner wall of the overpressure protection chamber 12; the protection chamber inlet 121 and the protection chamber outlet 122 are spaced apart along a predetermined axis L1; the protection chamber inlet 121 is connected to the air inlet 111 through an air inlet channel 112; the protection chamber outlet 122 is connected to the air outlet interface 15 through an air outlet channel.

[0023] like Figure 5 and Figure 6 As shown, the protection chamber inlet 121 and the protection chamber outlet 122 are located between the front elastic sealing ring 3 and the rear elastic sealing ring 4 when the safety valve core 2 is in the open position; that is, along the direction in which the safety valve core 2 moves from the open position to the closed position (i.e. Figure 5 (as shown from right to left in the figure) are the rear elastic sealing ring 4, the protection chamber outlet 122, the protection chamber inlet 121 and the front elastic sealing ring 3 in sequence; at this time, the protection chamber outlet 122 is connected to the protection chamber inlet 121 through the gap from the outer wall of the safety valve core 2 between the front elastic sealing ring 3 and the rear elastic sealing ring 4 to the inner wall of the overpressure protection chamber 12; that is, the air inlet channel 112 is connected to the air outlet channel.

[0024] like Figure 7 and Figure 8As shown, the front elastic sealing ring 3 is located between the protection chamber inlet 121 and the protection chamber outlet 122 when the safety valve core 2 is in the closed position; that is, along the direction in which the safety valve core 2 moves from the open position to the closed position (i.e. Figure 7 In the figure (shown from right to left), they are the protection chamber outlet 122, the rear elastic sealing ring 4, the protection chamber inlet 121, and the front elastic sealing ring 3; at this time, the protection chamber outlet 122 and the protection chamber inlet 121 are blocked by the rear elastic sealing ring 4, and the fuel in the overpressure protection chamber 12 cannot pass through the rear elastic sealing ring 4, and therefore cannot enter the air outlet channel to reach the air outlet interface 15.

[0025] This technical solution controls the connectivity between the protection chamber inlet 121 and the protection chamber outlet 122 by changing the positions of the front elastic sealing ring 3 and the rear elastic sealing ring 4 following the movement of the safety valve core 2. The design is reasonable and easy to implement.

[0026] The overpressure protection chamber 12 is provided with an elastic return member which enables the safety valve core 2 to have a tendency to return from the closed position to the open position.

[0027] Along the direction of movement from the open position to the closed position of the safety valve core 2, the safety valve core 2 has a front end portion 21 before the front elastic sealing ring 3 and a rear end portion 22 after the rear elastic sealing ring 4; the valve body 1 is provided with a mounting hole 124 connected to the overpressure protection chamber 12; the mounting hole 124 is provided with a sealing cover 6 for sealing the mounting hole 124; the sealing cover 6 is provided with a through hole 61 coaxial with the safety valve core 2; the front end portion 21 of the safety valve core 2 is penetrated into the through hole 61.

[0028] The elastic reset member is a spring 5, which is sleeved on the safety valve core 2 and has one end against the mounting valve core and the other end against the inner side of the sealing cover 6. When the safety valve core 2 is in the open position, its rear end 22 abuts against the inner wall of the overpressure protection chamber 12.

[0029] The valve body 1 of the present technical solution is provided with a mounting hole to facilitate the installation of the valve core and the spring 5; the front end of the safety valve core 2 is inserted into the through hole 61 of the sealing cover 6, and when the position is switched, the safety valve core 2 moves in the through hole 61 to have a limiting and guiding effect, thereby improving the stability of the activity.

[0030] The valve body 1 is provided with a decompression chamber 13 for installing the decompression valve core 8; the inner wall of the decompression chamber 13 is provided with a decompression chamber inlet 131 and a decompression chamber outlet 132; the air outlet channel includes a first air outlet channel 123 connecting the protection chamber outlet 122 and the decompression chamber inlet 131.

[0031] The valve body 1 is provided with a flow regulating chamber 14 for installing the switch valve core 9; the inner wall of the flow regulating chamber 14 is provided with a flow regulating chamber inlet 141 and a flow regulating chamber outlet 142; the air outlet channel includes a second air outlet channel connecting the pressure reducing chamber outlet 132 and the flow regulating chamber inlet 141 and a third air outlet channel connecting the flow regulating chamber outlet 142 and the air outlet interface 15.

[0032] The valve body 1 is provided with an air intake chamber 11 for installing the air intake valve core 7 ; the air intake inlet 111 is provided on the inner wall of the air intake chamber 11 .

[0033] The air intake chamber 11 is equipped with an air intake valve core 7 for connecting to a gas cylinder; the flow regulating chamber 14 is equipped with a switch valve core 9; the axis L2 of the air intake valve core and the axis L3 of the switch valve core are in the same straight line, and the axis L2 of the air intake valve core and the axis L3 of the switch valve core are perpendicular to the axis of the safety valve core 2.

[0034] The chambers of the technical solution are reasonably arranged and compactly structured, making full use of the internal space of the valve body 1, wherein the axis L2 of the air inlet valve core and the axis L3 of the switch valve core are in the same straight line, that is, the switch of the gas cylinder and the furnace body are arranged in the same straight line, thereby improving the space utilization rate in the cassette furnace.

[0035] The intake valve core 7 and the switch valve core 9 belong to the prior art, so they are not described in detail.

[0036] In this embodiment, a clamping ring 71 for clamping with the gas cylinder is sleeved on the intake valve core 7, and an annular magnetic block (not shown in the drawings) for magnetically cooperating with the gas cylinder is arranged inside the clamping ring 71.

[0037] Embodiment 2

[0038] A cartridge stove comprises a stove head and the valve of the first embodiment; the gas outlet interface 15 is connected to the stove head.

[0039] The above-mentioned preferred implementation modes should be regarded as illustrative examples of the implementation modes of the present application scheme. Any technical deductions, replacements, improvements, etc. that are identical or similar to the present application scheme or made based on this scheme should be regarded as within the scope of protection of this patent.

Claims

1. A valve for a cartridge furnace, comprising a valve body, the valve body being provided with an air inlet for inputting fuel from a gas supply bottle and an air outlet for outputting fuel from the gas supply bottle to the furnace body; characterized in that: The valve also includes a safety valve core; The valve body is provided with an overpressure protection chamber which is connected to the air inlet and the air outlet respectively; The safety valve core is installed in the overpressure protection chamber so as to be movable along a predetermined axis between an open position and a closed position; The safety valve core is configured to be in an open position when the pressure in the overpressure protection chamber is less than a preset value, and to switch to a closed position when the pressure in the overpressure protection chamber is greater than the preset value; The air inlet is connected to the air outlet interface when the safety valve core is in the open position; the air inlet is disconnected from the air outlet interface when the safety valve core is in the closed position.

2. The valve of the cartridge furnace according to claim 1, characterized in that: The axis of the safety valve core is on the predetermined axis; The outer wall of the safety valve core is provided with a front elastic sealing ring and a rear elastic sealing ring that move with the safety valve core, and the front elastic sealing ring and the rear elastic sealing ring are spaced apart along the axis of the safety valve core, wherein along the direction in which the safety valve core moves from the open position to the closed position, the front elastic sealing ring is located in front of the rear elastic sealing ring; The front elastic sealing ring and the rear elastic sealing ring are both in contact with the inner wall of the overpressure protection chamber; A protection chamber inlet and a protection chamber outlet are provided on the inner wall of the overpressure protection chamber; the protection chamber inlet and the protection chamber outlet are spaced apart and distributed along a predetermined axis; The protection cavity inlet is connected with the air inlet through an air inlet channel; The protection cavity outlet is connected to the gas outlet interface through a gas outlet channel; The protection chamber inlet and the protection chamber outlet are located between the front elastic sealing ring and the rear elastic sealing ring when the safety valve core is in the open position; When the safety valve core is in the closed position, the front elastic sealing ring is located between the protection chamber inlet and the protection chamber outlet.

3. The valve of the cartridge furnace according to claim 2, characterized in that: An elastic reset member is arranged in the overpressure protection chamber, which makes the safety valve core have a tendency to return from the closed position to the open position.

4. The valve of the cartridge furnace according to claim 3, characterized in that: In the direction of movement of the safety valve core from the open position to the closed position, the safety valve core has a front end portion before the front elastic sealing ring and a rear end portion after the rear elastic sealing ring; The valve body is provided with a mounting hole communicating with the overpressure protection chamber; the mounting hole is provided with a sealing cover for sealing the mounting hole; the sealing cover is provided with a through hole coaxial with the safety valve core; the front end of the safety valve core is inserted into the through hole; The elastic reset member is a spring; the spring is sleeved on the safety valve core, one end of the spring abuts against the mounting valve core, and the other end abuts against the inner side of the sealing cover.

5. The valve of the cartridge furnace according to any one of claims 2 to 3, characterized in that: The valve body is provided with a pressure reducing chamber for installing a pressure reducing valve core; The inner wall of the decompression chamber is provided with a decompression chamber inlet and a decompression chamber outlet; The air outlet passage comprises a first air outlet passage communicating with the protection chamber outlet and the decompression chamber inlet.

6. The valve of the cartridge furnace according to claim 5, characterized in that: The valve body is provided with a flow regulating chamber for installing a switch valve core; The inner wall of the flow regulating chamber is provided with a flow regulating chamber inlet and a flow regulating chamber outlet; The air outlet channel comprises a second air outlet channel connecting the outlet of the decompression chamber and the inlet of the flow regulating chamber, and a third air outlet channel connecting the outlet of the flow regulating chamber and the air outlet interface.

7. The valve of the cartridge furnace according to claim 6, characterized in that: The valve body is provided with an air intake chamber for installing an air intake valve core; The air inlet is arranged on the inner wall of the air inlet chamber.

8. The valve of the cartridge furnace according to claim 7, characterized in that: The air intake chamber is equipped with an air intake valve core for connecting with a gas cylinder; The flow regulating chamber is equipped with a switch valve core; The axis of the air intake valve core and the axis of the switch valve core are in the same straight line, and the axes of the air intake valve core, the switch valve core and the safety valve core are perpendicular to each other.

9. A cartridge furnace, characterized in that: It comprises a burner head and the valve according to any one of claims 1 to 8; the gas outlet interface is connected to the burner head.

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