Cartridge valve with double overpressure protection

Abstract

The utility model discloses a cassette valve with double overvoltage protection device, including valve body, the inside of valve body is equipped with air inlet cavity, intercommunication chamber, inner chamber and air outlet cavity respectively and is used for air inlet, flow, pressure stabilization and air outlet in proper order, first overvoltage protection mechanism is installed to air inlet cavity, second overvoltage protection mechanism is installed to intercommunication chamber. In the utility model, when the use pressure of gas tank exceeds the set pressure, first, the explosion -proof rod will directly jump, protrude, make the air outlet hole between intercommunication chamber and pressure stabilization chamber in two rubber rings, reach the cut -off air inlet source, when the air pressure further increases, the air inlet ejector pin will be pushed out, and the gas tank is pushed away from the valve body, and the air source is completely cut off, and after the bottle is retreated, the air inlet ejector pin resets simultaneously, so that the gas in the air inlet cavity cannot be leaked, which is more safe and reliable, realizes double overvoltage protection, and the overall safety factor is higher.

Description

Technical Field

[0001] This utility model relates to the field of cassette valve technology, and in particular to a cassette valve with a dual overpressure protection device. Background Technology

[0002] Portable cartridge stoves are small, lightweight gas stoves primarily used for outdoor activities (such as camping, picnics, and hiking) or for emergency heating of food or boiling water at home. They typically use dedicated, quick-replacement cartridge gas canisters (also called butane canisters or lighter-style gas canisters) as fuel. These canisters have a standard connector on top for a quick "click" to attach and detach the stove. When connected to an external gas source, a cartridge valve is usually installed to control the gas flow.

[0003] Currently, existing technologies lack a structure where the air enters the pressure-stabilizing chamber through an overpressure protection mechanism at the inlet end of the cassette valve, resulting in a low safety factor and potential leakage risk when the gas tank pressure is high. Therefore, this invention proposes a new cassette valve with dual overpressure protection devices. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by proposing a cassette valve with a dual overpressure protection device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a cassette valve with dual overpressure protection devices, comprising a valve body, wherein the valve body is provided with an air inlet chamber, a connecting chamber, an inner chamber and an air outlet chamber respectively for air intake, flow, pressure stabilization and air outlet in sequence; the air inlet chamber is equipped with a first overpressure protection mechanism and the connecting chamber is equipped with a second overpressure protection mechanism.

[0006] The first overpressure protection mechanism includes a fixed plate fixedly connected to one side of the outer surface of the valve body, and an explosion-proof rod is slidably connected through the side wall of the fixed plate;

[0007] The second overpressure protection mechanism includes a magnetic air inlet nozzle fixedly connected to one end of the valve body. An air inlet copper sleeve is slidably connected through the inside of the magnetic air inlet nozzle, and an air inlet pin is slidably connected through the inside of the air inlet copper sleeve.

[0008] Furthermore, an explosion-proof rod spring is fitted onto the outer surface of the explosion-proof rod, and one end of the explosion-proof rod spring is fixedly connected to the inner wall of the valve body.

[0009] Furthermore, a pin spring is fitted on the outer surface of the air intake pin, and one end of the pin spring is fixedly connected to the inner wall of the air intake copper sleeve.

[0010] Furthermore, an air inlet spring is fitted on the outer surface of the air inlet copper sleeve, and one end of the air inlet spring is fixedly connected to the inner wall of the magnetic air inlet nozzle.

[0011] Furthermore, a push plate is slidably connected to the outer surface of the explosion-proof rod, and the push plate is fixedly connected to the inner side of the fixed plate.

[0012] Furthermore, a magnet bracket is fixedly connected to the outer surface of the magnetic air inlet nozzle, and a magnet is fixedly connected to the inner side of the magnet bracket.

[0013] Furthermore, an air tank holder is provided inside the side wall of the magnetic air inlet nozzle at the end away from the valve body.

[0014] This utility model has the following beneficial effects:

[0015] In use, this utility model features a cassette valve with dual overpressure protection. Through the first and second overpressure protection mechanisms, when the operating pressure of the gas cylinder exceeds the set pressure, the explosion-proof rod will first jump and protrude, positioning the vent between the connecting chamber and the pressure-stabilizing chamber between the two rubber rings, thus cutting off the air supply. When the air pressure further increases, the inlet pin will push outwards, removing the gas cylinder from the valve body and completely cutting off the air supply. After the cylinder is removed, the inlet pin simultaneously resets, preventing gas leakage from the inlet chamber, making it safer and more reliable. This dual overpressure protection provides a higher overall safety factor. Attached Figure Description

[0016] Figure 1 Exploded views of the first and second overvoltage protection mechanisms of this utility model;

[0017] Figure 2 This is a first-view sectional view of the present invention;

[0018] Figure 3 This is a second-view sectional view of the present invention in two states, a and b.

[0019] Legend:

[0020] 1. Valve body; 2. Magnet bracket; 3. Magnet; 4. Magnetic air inlet nozzle; 5. Air inlet spring; 6. Air inlet copper sleeve; 7. Air inlet pin; 8. Pin spring; 9. Fixing plate; 10. Push plate; 11. Explosion-proof rod spring; 12. Explosion-proof rod; a. Positional relationship of the explosion-proof rod under overpressure protection state; b. Positional relationship of the explosion-proof rod under normal state. Detailed Implementation

[0021] Figures 1 to 3As shown, a cassette valve with dual overpressure protection devices is disclosed, including a valve body 1. The valve body 1 has an air inlet chamber, a connecting chamber, an inner chamber and an air outlet chamber respectively, which are used for air intake, flow, pressure stabilization and air outlet in sequence. The air inlet chamber is equipped with a first overpressure protection mechanism and the connecting chamber is equipped with a second overpressure protection mechanism.

[0022] The first overpressure protection mechanism includes a fixing plate 9 fixedly connected to one side of the outer surface of the valve body 1. An explosion-proof rod 12 is slidably connected through the side wall of the fixing plate 9. An explosion-proof rod spring 11 is sleeved on the outer surface of the explosion-proof rod 12. One end of the explosion-proof rod spring 11 is fixedly connected to the inner wall of the valve body 1. A plurality of rubber rings are sleeved on the outer surface of the end of the explosion-proof rod 12 away from the explosion-proof rod spring 11.

[0023] The first layer of overpressure protection ensures that, under normal conditions, the explosion-proof rod spring 11 presses the explosion-proof rod 12 into the vent hole, which is normally connected. When the gas tank pressure exceeds 4.5KG (when the inlet pressure reaches the spring contraction pressure), the explosion-proof rod 12 will push outward, so that the vent hole between the connecting chamber and the pressure stabilizing chamber is between the two rubber rings, thus cutting off the air supply. The outer end of the explosion-proof rod 12 and the fixing plate 9 are equipped with a buckle structure (the top of the explosion-proof rod 12 has a buckle groove, and the fixing plate 9 has a retaining spring and a pressure plate, which pops out the retaining spring to lock the jump rod), to prevent misoperation after jumping. It is necessary to manually press the reset button before air can be supplied.

[0024] The first overpressure protection mechanism is used to push the explosion-proof rod 12 outward to a fixed position when the set pressure is reached, cutting off the air intake source from entering the inner cavity of the valve body 1.

[0025] Correspondingly, a push plate 10 is slidably connected to the outer surface of the explosion-proof rod 12, and the push plate 10 is fixedly connected to the inner side of the fixing plate 9. The diameter of the hole through which the push plate 10 passes is slightly smaller than the diameter of the hole in the fixing plate 9. A groove matching the diameter of the hole in the push plate 10 is opened on the outer surface of the explosion-proof rod 12. When the explosion-proof rod 12 is pushed outward, the inner wall of the groove will abut against the push plate 10, which is equivalent to having a fixed stroke device to prevent the explosion-proof rod 12 from falling off the valve body 1.

[0026] The second overpressure protection mechanism includes a magnetic air inlet nozzle 4 fixedly connected to one end of the valve body 1. An air inlet copper sleeve 6 is slidably connected through the inside of the magnetic air inlet nozzle 4. An air inlet spring 5 is sleeved on the outer surface of the air inlet copper sleeve 6. One end of the air inlet spring 5 is fixedly connected to the inner wall of the magnetic air inlet nozzle 4. An air inlet pin 7 is slidably connected through the inside of the air inlet copper sleeve 6. A pin spring 8 is sleeved on the outer surface of the air inlet pin 7. One end of the pin spring 8 is fixedly connected to the inner wall of the air inlet copper sleeve 6.

[0027] The second overpressure protection mechanism activates after the explosion-proof rod 12 of the first overpressure protection mechanism trips. If the gas cylinder pressure continues to rise to 5KG, the inlet pin 7 in the second overpressure protection mechanism will push outward, pushing the gas cylinder away from the valve body, cutting off the gas supply. After the cylinder is removed, the inlet pin 7 will reset, preventing the gas in the inlet chamber from leaking out.

[0028] The second overpressure protection is used to push the lever outward when the set pressure is reached, pushing the gas tank away from the valve body and cutting off the gas supply.

[0029] A magnetic bracket 2 is fixedly connected to the outer surface of the magnetic air inlet nozzle 4. A magnet 3 is fixedly connected to the inner side of the magnetic bracket 2. An air canister holder is provided inside the side wall of the magnetic air inlet nozzle 4 away from the valve body 1. An external air canister can be inserted into the magnetic air inlet nozzle 4 and locked into the air canister holder. The magnetic installation method makes it easy and quick to install and remove the air canister.

[0030] The valve body 1 contains traditional components such as a valve core and an exhaust copper pipe. The gas source from the gas tank enters through the inlet chamber (equipped with a second overpressure protection mechanism), then enters the connecting chamber (equipped with a first overpressure protection mechanism), and enters the inner cavity through the exhaust hole between the connecting chamber and the pressure stabilizing chamber for pressure regulation. Then, it enters the exhaust chamber where the valve core is located through the pressure stabilizing chamber, and after being regulated by the valve core, it enters the exhaust copper pipe and finally exhausts gas into the gas inlet pipe of the cassette stove (the gas flow process not described in detail above is common knowledge in this technical field).

[0031] When using a cartridge valve with dual overpressure protection, after the gas canister is inserted into the gas canister holder of the magnetic inlet nozzle 4 and installed in place, the first and second overpressure protection mechanisms will activate when the gas canister's operating pressure exceeds the set pressure. First, the explosion-proof rod 12 will jump out, positioning the vent between the connecting chamber and the pressure stabilizing chamber between the two rubber rings, thus cutting off the gas supply. When the gas pressure increases further, the inlet pin 7 will push outward, removing the gas canister from the valve body 1 and completely cutting off the gas supply. After the canister is removed, the inlet pin 7 will simultaneously reset, preventing gas leakage from the inlet chamber, making it safer and more reliable. This dual overpressure protection provides a higher overall safety factor and greater reliability.

[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A cassette valve with dual overpressure protection devices, comprising a valve body (1), characterized in that: The valve body (1) has an air inlet chamber, a connecting chamber, an inner chamber and an air outlet chamber respectively for air intake, flow, pressure stabilization and air outlet. The air inlet chamber is equipped with a first overpressure protection mechanism and the connecting chamber is equipped with a second overpressure protection mechanism. The first overpressure protection mechanism includes a fixed plate (9) fixedly connected to one side of the outer surface of the valve body (1), and an explosion-proof rod (12) is slidably connected through the side wall of the fixed plate (9). The second overpressure protection mechanism includes a magnetic air inlet nozzle (4) fixedly connected to one end of the valve body (1), an air inlet copper sleeve (6) is slidably connected through the inside of the magnetic air inlet nozzle (4), and an air inlet pin (7) is slidably connected through the inside of the air inlet copper sleeve (6).

2. A cassette valve with dual overpressure protection device according to claim 1, characterized in that: An explosion-proof rod spring (11) is fitted on the outer surface of the explosion-proof rod (12), and one end of the explosion-proof rod spring (11) is fixedly connected to the inner wall of the valve body (1).

3. A cassette valve with dual overpressure protection device according to claim 1, characterized in that: The outer surface of the air intake pin (7) is fitted with a pin spring (8), and one end of the pin spring (8) is fixedly connected to the inner wall of the air intake copper sleeve (6).

4. A cassette valve with dual overpressure protection device according to claim 1, characterized in that: An air inlet spring (5) is fitted on the outer surface of the air inlet copper sleeve (6), and one end of the air inlet spring (5) is fixedly connected to the inner wall of the magnetic air inlet nozzle (4).

5. A cassette valve with dual overpressure protection device according to claim 1, characterized in that: The outer surface of the explosion-proof rod (12) is fitted with a sliding push plate (10), and the push plate (10) is fixedly connected to the inner side of the fixed plate (9).

6. A cassette valve with dual overpressure protection device according to claim 1, characterized in that: The outer surface of the magnetic air inlet nozzle (4) is fitted with a magnet bracket (2) and a magnet (3) is fixedly connected to the inner side of the magnet bracket (2).

7. A cassette valve with dual overpressure protection device according to claim 1, characterized in that: The magnetic air inlet nozzle (4) has an air tank holder inside the side wall at the end away from the valve body (1).

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