Safety structure of fire gun with automatic power-off protection function

Abstract

The utility model discloses a kind of automatic power-off protection function's flame gun safety structure, it is related to flame gun technical field, and it includes: gun body, its bottom end is provided with fuel storage cavity, inside fixed connection has igniter, front end is provided with flame port;Fuel delivery pipeline, fuel delivery pipeline one end is connected in fuel storage cavity, other end is butt joint with the flame port, the igniter corresponds the outlet end of fuel delivery pipeline;Sensor monitoring module is embedded in the gun body inside, for real-time acquisition flame gun's temperature and pressure data;Safety power-off module is connected in the power supply loop of flame gun, for cutting off the power supply loop and fuel delivery of flame gun;Intelligent control module is set in the gun body inside, including controller, man-machine interaction unit, the man-machine interaction unit is set on the surface of the gun body.This application has the function of real-time monitoring and automatic power-off.

Description

Technical Field

[0001] This utility model belongs to the field of flamethrower technology, specifically relating to a flamethrower safety structure with automatic power-off protection function. Background Technology

[0002] Flamethrowers, with their high-temperature flame characteristics, are widely used in welding, metal processing, outdoor ignition, cooking and many other fields.

[0003] CN216159046U describes a flamethrower with a safety locking switch. The flamethrower is connected to the ignition mechanism via a locking mechanism, which automatically locks the ignition mechanism to prevent accidental activation of the flamethrower.

[0004] CN214038408U introduces a new type of automatic locking flame gun, which simultaneously presses the first valve and the igniter by pressing the trigger, thereby achieving simultaneous gas release and ignition.

[0005] Neither device can be safely controlled during use, and risks such as overheating still exist. Utility Model Content

[0006] The purpose of this utility model is to provide a safety structure for a flamethrower with automatic power-off protection to solve the technical problems mentioned in the background art.

[0007] To achieve the above objectives, the specific technical solution of this utility model is as follows:

[0008] A safety structure for a flamethrower with automatic power-off protection includes:

[0009] The gun body has a fuel storage chamber at the bottom, an ignition device fixedly connected inside, and a flame nozzle at the front.

[0010] A fuel delivery pipeline, one end of which is connected to a fuel storage chamber and the other end of which is connected to the flame nozzle, and an ignition device corresponding to the outlet end of the fuel delivery pipeline;

[0011] A sensor monitoring module is embedded inside the gun body to collect temperature and pressure data of the flamethrower in real time.

[0012] The power-off module is connected in series in the power circuit of the flame gun to cut off the power circuit and fuel supply of the flame gun.

[0013] An intelligent control module is located inside the gun body and includes a controller and a human-machine interaction unit. The human-machine interaction unit is located on the surface of the gun body, and the controller is electrically connected to a sensor monitoring module and a safety power-off module.

[0014] The controller is configured as follows:

[0015] The system receives and analyzes the real-time data transmitted by the sensor monitoring module, and controls the power-off operation when the data exceeds a preset safety threshold.

[0016] Optionally, the sensor monitoring module includes:

[0017] A temperature sensor group, including a first temperature sensor and a second temperature sensor;

[0018] A pressure sensor group, including a first pressure sensor and a second pressure sensor;

[0019] The first temperature sensor is installed on the gun body near the nozzle to monitor the operating temperature in the nozzle area. The second temperature sensor is attached to the outer wall of the fuel storage chamber to monitor the temperature of the fuel storage chamber. The first pressure sensor is built into the fuel storage chamber to monitor the fuel pressure inside the chamber. The second pressure sensor is connected in series in the fuel delivery pipeline to monitor pressure changes during fuel delivery.

[0020] Optionally, the temperature sensor group uses a high-temperature resistant thermocouple sensor with a measurement accuracy of ±1℃; the pressure sensor group uses a high-precision pressure transmitter with a measurement accuracy of ±0.5%FS.

[0021] Optionally, the power-off module includes an electrically controlled fuel valve, which is connected in series in the fuel delivery pipeline and electrically connected to the power supply circuit and the controller, respectively.

[0022] Optionally, the power-off module further includes:

[0023] The mechanical power-off unit further includes an electromagnetic actuator and mechanical contacts. The mechanical contacts are connected in series with the power circuit. The electromagnetic actuator is fixed inside the gun body and is in transmission cooperation with the mechanical contacts.

[0024] An electronic power-off unit includes a silicon controlled rectifier (SCR) element connected in series with the power supply circuit;

[0025] The controller is electrically connected to the electromagnetic driver, the thyristor element, and the ignition device, respectively.

[0026] The controller is configured to: when a power-off operation is performed, synchronously drive the electromagnetic driver to disconnect the mechanical contacts, control the thyristor element to turn off, and simultaneously stop the ignition device from igniting and de-energize and close the electronically controlled fuel valve.

[0027] Optionally, the operating logic of the power-off module is as follows:

[0028] When the controller controls the execution of a power-off operation, the mechanical power-off unit and the electronic power-off unit execute the power-off action synchronously;

[0029] If one of the power-off units fails, the other power-off unit can independently disconnect the power circuit;

[0030] After the power circuit is cut off, the electronically controlled fuel valve can be closed in two ways: "direct control by the controller" or "power failure". The ignition device stops working, forming a dual safety protection of electronic power failure and fuel delivery interruption.

[0031] Optionally, the human-computer interaction unit includes:

[0032] The operation panel is equipped with threshold adjustment buttons and function selection buttons.

[0033] The display screen is used to display the working temperature, fuel pressure and currently set safety threshold of the flame gun in real time.

[0034] Users can customize temperature and pressure safety thresholds using the buttons on the control panel, and the settings are transmitted to the controller and stored.

[0035] Optionally, the gun body is covered with a high-temperature insulation layer, which is made of flame-retardant and heat-insulating material.

[0036] Optionally, the fuel storage chamber and the gun body are connected by a detachable sealed connection, and a leak-proof sealing gasket is provided at the connection to facilitate fuel replacement and ensure sealing performance. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0038] Figure 2 This is a schematic diagram of the internal structure of an embodiment of this application;

[0039] Figure 3 This is a schematic diagram of the power-off procedure control structure according to an embodiment of this application;

[0040] The markings in the diagram are as follows: 1. Gun body; 10. High-temperature insulation layer; 11. Leak-proof sealing gasket; 2. Fuel storage chamber; 3. Ignition device; 4. Flame nozzle; 5. Fuel delivery pipeline; 6. Safety power-off module; 61. Mechanical power-off unit; 611. Electromagnetic actuator; 612. Mechanical contact; 62. Electronic power-off unit; 621. Thyristor element; 63. Electrically controlled fuel valve; 7. Controller; 8. Human-machine interface unit; 81. Operation panel; 82. Threshold adjustment button; 83. Function selection button; 84. Display screen; 91. First temperature sensor; 92. Second temperature sensor; 93. First pressure sensor; 94. Second pressure sensor. Detailed Implementation

[0041] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0042] This application discloses a safety structure for a flamethrower with automatic power-off protection.

[0043] Refer to the image Figure 1-3 As shown, this embodiment provides a safety structure for a flamethrower with automatic power-off protection, including a flamethrower body 1, a fuel delivery pipe 5, a sensor monitoring module, a safety power-off module 6, and an intelligent control module.

[0044] The gun body 1 has a fuel storage chamber 2 at its bottom for storing fuel. The fuel storage chamber 2 is connected to the mounting interface at the bottom of the gun body 1 via an external thread, and a leak-proof sealing gasket 11 is fitted at the connection. An ignition device 3 is fixedly connected to the gun body 1 via a bracket. The ignition device 3 supplies the flame after combustion. In this embodiment, the ignition device 3 is a high-voltage electronic igniter. The front end of the gun body 1 has an integrally formed flame nozzle 4, and the gun body 1 is covered with a high-temperature insulation layer 10, which is made of flame-retardant and heat-insulating material.

[0045] One end of the fuel delivery pipe 5 is sealed to the outlet of the fuel storage chamber 2 via a compression fitting, and the other end is threaded to the burner nozzle 4, forming a fuel delivery channel. The ignition needle of the ignition device 3 extends into the interior of the outlet end of the fuel delivery pipe 5 to ensure that the fuel can be ignited in time after it is sprayed out of the pipe, forming a stable flame.

[0046] The sensor monitoring module is embedded inside the gun body 1 to collect temperature and pressure data of the flamethrower in real time. It includes a temperature sensor group and a pressure sensor group. The temperature sensor group uses a high-temperature resistant thermocouple sensor with a measurement accuracy of ±1℃. It includes a first temperature sensor 91 and a second temperature sensor 92. The first temperature sensor 91 is fixedly connected to the inner side of the gun body 1 near the flame nozzle 4 by a bracket and is used to monitor the operating temperature of the flame nozzle 4 area in real time. The second temperature sensor 92 is fixedly attached to the middle of the outer wall of the fuel storage chamber 2 and is used to monitor the temperature change of the fuel storage chamber 2.

[0047] The pressure sensor group uses a high-precision pressure transmitter with a measurement accuracy of ±0.5%FS. This means its measurement range is compatible with the fuel operating pressure range of the flamethrower. The pressure sensor group includes a first pressure sensor 93 and a second pressure sensor 94. The first pressure sensor 93 is threadedly fixed inside the fuel storage chamber 2 to monitor the fuel pressure within the chamber. The second pressure sensor 94 is connected in series in the middle of the fuel delivery pipeline 5 to monitor pressure changes during fuel delivery.

[0048] The power-off module 6 is connected in series in the power circuit of the flamethrower. It includes a mechanical power-off unit 61, an electronic power-off unit 62, and an electronically controlled fuel valve 63. The mechanical power-off unit 61 includes an electromagnetic actuator 611 and a mechanical contact 612. In this embodiment, the electromagnetic actuator 611 is a push-pull electromagnet, and the mechanical contact 612 is a silver contact relay. The mechanical contact 612 is connected in series in the main power circuit. The electromagnetic actuator 611 is fixed to the mounting base inside the gun body 1 by bolts, and its driving end is in transmission cooperation with the mechanical contact 612 to cut off the power supply through mechanical action. The electronic power-off unit 62 includes a thyristor element 621, which is connected in series in the power circuit to cut off the power supply through an electronic signal. An electrically controlled fuel valve 63 is connected in series at one end of the fuel delivery pipeline 5 near the fuel storage chamber 2, and is connected to the power supply circuit. In this embodiment, the electrically controlled fuel valve 63 is a normally closed electromagnetic ball valve. Its initial state is closed. After being energized, the valve core opens to deliver fuel. After being de-energized, the valve core automatically resets and closes, ensuring that fuel delivery can be quickly interrupted in the event of power failure or malfunction. The mechanical contact 612 and the thyristor element 621 form a series dual protection. When either unit is disconnected, the main power supply circuit can be cut off, ensuring that power failure protection can still be achieved even if a single unit fails.

[0049] In this embodiment, the intelligent control module is housed in an independent mounting cavity inside the gun body 1, and includes a controller 7 and a human-machine interface unit 8. The human-machine interface unit 8 is embedded in an easily accessible location on the surface of the gun body 1, and includes an operation panel 81 and a display screen 84. The operation panel 81 is equipped with a threshold adjustment button 82 and a function selection button 83, allowing operators to customize temperature and pressure safety thresholds and start / stop the equipment. In this embodiment, the function selection button 83 is equipped with anti-accidental touch logic; a long press for 2 seconds is required to power on the equipment. The display screen 84 displays the flame gun's operating temperature, fuel pressure, and currently set safety thresholds in real time, allowing operators to monitor the equipment's operating status.

[0050] The controller 7 is fixed inside the gun body 1. In this embodiment, the controller 7 is connected to the power supply via an independent power supply branch. This branch bypasses the mechanical power-off unit 61 and the electronic power-off unit 62, ensuring that the controller can still maintain short-term power supply to complete the execution of the electronic fuel valve closing command after the main power circuit is cut off. The controller 7 is electrically connected to the sensor monitoring module, the fuse power-off module 6, the ignition device 3, and the electronic fuel valve 63.

[0051] The controller 7 is configured to execute the following control logic: receive temperature and pressure data transmitted by the sensor monitoring module in real time, and compare and analyze them with the preset safety threshold set by the operator through the human-machine interaction unit 8;

[0052] When any monitoring data exceeds the preset safety threshold, the mechanical power-off unit 61 and the electronic power-off unit 62 are controlled to simultaneously perform the power-off action—the electromagnetic driver 611 drives the mechanical contact 612 to open, and the thyristor element 621 is turned off, thus providing double protection to cut off the power circuit.

[0053] If one of the power-off units fails, the other power-off unit can independently disconnect the power circuit, ensuring reliable power-off. Simultaneously with the power circuit disconnection, the controller 7 directly sends a closing command to the electronically controlled fuel valve 63, which has an automatic closing function in case of power failure. By closing the valve through both "direct control by the controller 7" and "power failure," the fuel supply is cut off, and the ignition device 3 simultaneously stops working, forming a dual safety protection system of electronic power failure and fuel supply interruption.

[0054] The working process of this embodiment is as follows: The operator sets the safety threshold using the threshold adjustment button 82 and controls the power-on start using the function selection button 83. After receiving the start signal, the controller 7 controls the electronic fuel valve 63 to open, and after a delay of 80ms (the filling time adapted to the length of the fuel delivery pipeline), it drives the ignition device 3 to ignite. The fuel is ignited precisely when it is delivered to the flame nozzle 4 through the fuel delivery pipeline 5. The sensor monitoring module collects various parameters in real time and transmits them to the controller 7, which is simultaneously displayed on the display screen 84.

[0055] If the temperature of the burner nozzle 4 rises sharply and exceeds the threshold due to factors such as pipe blockage, the controller 7 immediately performs a power-off operation. This controls the electromagnetic actuator 611 to pull the mechanical contact 612 out of the circuit, simultaneously turning off the thyristor element 621 and cutting off the power circuit. At the same time, the controller 7 controls the electronic fuel valve 63 to close, the ignition device 3 stops working, and the flame extinguishes due to fuel shortage. Even if the mechanical contact 612 fails due to adhesion, the thyristor element 621 can still cut off the power supply, ensuring the execution of the protection action.

[0056] After the operation is completed, the operator controls the power-off shutdown via function selection button 83, controller 7 controls the electronic fuel valve 63 to close and the ignition device 3 to stop, and at the same time cuts off the power supply, and the equipment enters standby mode.

[0057] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model are included within the scope of protection of this utility model.

Claims

1. A safety structure for a flamethrower with automatic power-off protection, characterized in that, include: The gun body (1) has a fuel storage chamber (2) at its bottom end, an ignition device (3) is fixedly connected inside, and a flame nozzle (4) is opened at the front end; A fuel delivery pipe (5) is connected at one end to a fuel storage chamber (2) and at the other end to a flame nozzle (4). The ignition device (3) corresponds to the outlet end of the fuel delivery pipe (5). The sensor monitoring module is embedded inside the gun body (1) and is used to collect the temperature and pressure data of the flame gun in real time. The power-off module (6) is connected in series in the power circuit of the flame gun to cut off the power circuit and fuel supply of the flame gun. The intelligent control module is located inside the gun body (1) and includes a controller (7) and a human-machine interaction unit (8). The human-machine interaction unit (8) is located on the surface of the gun body (1). The controller (7) is electrically connected to the sensor monitoring module and the safety power-off module (6). The controller (7) is configured as follows: The system receives and analyzes the real-time data transmitted by the sensor monitoring module, and controls the power-off operation when the data exceeds a preset safety threshold.

2. The safety structure of a flamethrower with automatic power-off protection function according to claim 1, characterized in that, The sensor monitoring module includes: A temperature sensor group, including a first temperature sensor (91) and a second temperature sensor (92); The pressure sensor group includes a first pressure sensor (93) and a second pressure sensor (94); The first temperature sensor (91) is installed on the gun body (1) near the nozzle (4) to monitor the operating temperature of the nozzle (4) area. The second temperature sensor (92) is attached to the outer wall of the fuel storage chamber (2) to monitor the temperature of the fuel storage chamber (2). The first pressure sensor (93) is built into the fuel storage chamber (2) to monitor the fuel pressure in the chamber. The second pressure sensor (94) is connected in series in the fuel delivery pipe (5) to monitor the pressure change during the fuel delivery process.

3. The safety structure of a flamethrower with automatic power-off protection function according to claim 2, characterized in that, The temperature sensor group uses a high-temperature resistant thermocouple sensor with a measurement accuracy of ±1℃; the pressure sensor group uses a high-precision pressure transmitter with a measurement accuracy of ±0.5%FS.

4. The safety structure of a flamethrower with automatic power-off protection function according to claim 1, characterized in that, The power-off module (6) includes an electronically controlled fuel valve (63), which is connected in series in the fuel delivery pipeline (5) and is electrically connected to the power circuit and the controller (7).

5. The safety structure of a flamethrower with automatic power-off protection function according to claim 4, characterized in that, The power-off module (6) also includes: The mechanical power-off unit (61) further includes an electromagnetic driver (611) and a mechanical contact (612). The mechanical contact (612) is connected in series with the power circuit. The electromagnetic driver (611) is fixed inside the gun body (1) and is in transmission cooperation with the mechanical contact (612). The electronic power-off unit (62) includes a silicon controlled rectifier (621) connected in series with the power supply circuit; The controller (7) is electrically connected to the electromagnetic driver (611), the thyristor (621), and the ignition device (3) respectively; The controller (7) is configured to: when the power-off operation is executed, synchronously drive the electromagnetic driver (611) to disconnect the mechanical contact (612), control the thyristor element (621) to turn off, and at the same time cause the ignition device (3) to stop ignition and the electronic fuel valve (63) to shut down due to power failure.

6. The safety structure of a flamethrower gun with automatic power-off protection function according to claim 5, characterized in that, The working logic of the power-off module (6) is as follows: When the controller (7) controls the execution of the power-off operation, the mechanical power-off unit (61) and the electronic power-off unit (62) execute the power-off action synchronously; If one of the power-off units fails, the other power-off unit can independently disconnect the power circuit; After the power circuit is cut off, the electronically controlled fuel valve (63) can be closed in two ways: "direct control by controller (7)" or "power failure". The ignition device (3) stops working, forming a dual safety protection of electronic power failure and fuel delivery interruption.

7. The safety structure of a flamethrower with automatic power-off protection function according to claim 1, characterized in that, The human-computer interaction unit (8) includes: The operation panel (81) is provided with a threshold adjustment button (82) and a function selection button (83); Display screen (84), the display screen is used to display the working temperature of the flame gun, fuel pressure and the currently set safety threshold in real time; The user can customize the temperature safety threshold and pressure safety threshold by using the buttons on the operation panel (81), and the set data is transmitted to the controller (7) and stored.

8. The safety structure of a flamethrower with automatic power-off protection function according to claim 1, characterized in that, The gun body (1) is covered with a high-temperature insulation layer (10), which is made of flame-retardant and heat-insulating material.

9. The safety structure of a flamethrower with automatic power-off protection function according to claim 1, characterized in that, The fuel storage chamber (2) and the gun body (1) are connected by a detachable sealed connection, and a leak-proof sealing gasket (11) is provided at the connection to facilitate fuel replacement and ensure sealing performance.

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