Gas outlet structure of a flame gun
Patent Information
- Application Number
- CN202522374025.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-11-10
- Publication Date
- 2026-10-09
- Estimated Expiration
- 2035-11-10
AI Technical Summary
[0004]针对现有技术的不足，本实用新型的目的在于提供一种喷火枪出气结构，以解决现有技术中的喷火枪出气结构在低温、高温环境以及倒置时无法正常点火使用的技术问题
[0006]采用上述结构后，本实用新型一种喷火枪出气结构具有以下优点：通过转动旋钮压缩调压弹簧，弹簧力推动连接块往第一安装腔方向移动，带动阀杆移动从而顶开气门芯，气体经进气道、气门芯、第二安装腔从出气道流出，流出气体的压力会作用在连接块上，产生一个与调压弹簧的弹簧力相反的力，当出气压力大于弹簧力时，促使连接块往调压弹簧方向移动，进一步压缩调压弹簧而使得出气压力与弹簧力平衡，减小了气门芯开度，限制气流，当出气压力小于弹簧力时，促使连接块往远离调压弹簧方向移动，进一步拉伸调压弹簧而使得出气压力与弹簧力平衡，增大了气门芯开度，增大气流，使得喷火枪出气结构能够自适应气压的变化，喷火枪在低压、高压以及倒置时均能够正常点火使用。
Smart Images
Figure CN224837436U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of flamethrower technology, specifically to a flamethrower exhaust structure. Background Technology
[0002] In the gas outlet structure of a flamethrower, a needle valve is generally used to control the gas flow. A connector for connecting to a gas cylinder is set at the lower end of the needle valve. A spring is set in the connector to adjust the opening of the needle valve. When the gas cylinder pressure changes, the spring force is balanced with the gas pressure, which determines the opening of the needle valve.
[0003] In low-temperature environments, the gas pressure inside the cylinder decreases, the spring cannot be fully compressed, and the valve opening is insufficient, preventing gas from passing smoothly through the inlet and outlet channels and thus preventing normal ignition. In high-temperature environments, the pressure inside the cylinder increases significantly, and the high-pressure gas excessively compresses the spring, causing the valve opening to be too large and the gas to be released too forcefully. This results in an imbalance in the fuel-air mixture ratio, making it impossible to form a stable combustion flame and thus preventing normal ignition. When the flame gun is inverted, it will also cause excessive pressure, extinguishing the flame. Utility Model Content
[0004] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a flame gun exhaust structure to solve the technical problem that the existing flame gun exhaust structure cannot be used normally in low temperature, high temperature environment and when inverted.
[0005] To solve the above-mentioned technical problems, this utility model provides a flame gun exhaust structure, comprising: The mounting base has a first mounting cavity, a second mounting cavity, an air inlet, and an air outlet. The first mounting cavity and the second mounting cavity are connected and distributed in the mounting base in the left and right direction. The first mounting cavity is connected to the air inlet, and the second mounting cavity is connected to the air outlet. The valve core is connected to the first mounting cavity and includes a valve stem that slides in the left-right direction. The intake passage is connected to the second mounting cavity through the valve core by sliding the valve stem. The connecting block slides in the left-right direction and is connected to the valve stem in the second mounting cavity; The knob is threaded onto the mounting base. Rotating the knob moves it closer to or further away from the connecting block. The pressure adjusting spring is located in the second mounting cavity and abuts against the connecting block and the knob.
[0006] With the above structure, the gas outlet structure of this utility model for a flame gun has the following advantages: By rotating the knob to compress the pressure regulating spring, the spring force pushes the connecting block to move towards the first mounting cavity, thereby moving the valve stem and opening the valve core. Gas flows out from the outlet through the air inlet, valve core, and second mounting cavity. The pressure of the outflowing gas acts on the connecting block, generating a force opposite to the spring force of the pressure regulating spring. When the outlet pressure is greater than the spring force, it causes the connecting block to move towards the pressure regulating spring, further compressing the pressure regulating spring so that the outlet pressure is balanced with the spring force, reducing the valve core opening and restricting the airflow. When the outlet pressure is less than the spring force, it causes the connecting block to move away from the pressure regulating spring, further stretching the pressure regulating spring so that the outlet pressure is balanced with the spring force, increasing the valve core opening and increasing the airflow. This allows the flame gun outlet structure to adapt to changes in air pressure, and the flame gun can be used normally in low pressure, high pressure, and inverted conditions.
[0007] As an improvement, the outer peripheral wall of the connecting block is provided with a first annular groove along the circumference, and a sealing ring is connected in the first annular groove. The sealing ring slides and seals with the inner wall of the second mounting cavity. This structure prevents gas from leaking between the connecting block and the second mounting cavity.
[0008] As an improvement, a first protrusion is provided on the end face of the connecting block facing the knob, and a second protrusion is provided on the end face of the knob facing the connecting block. The two ends of the pressure regulating spring are respectively sleeved on the first protrusion and the second protrusion. With this structure, the first protrusion and the second protrusion constitute the positioning structure of the pressure regulating spring, which can effectively prevent the pressure regulating spring from lateral slippage or twisting during installation and operation, and ensure that the spring force is always uniformly applied to the connecting block and the knob along the axial direction.
[0009] As an improvement, a balance spring is provided between the end face of the connecting block away from the pressure regulating spring and the inner wall of the second mounting cavity; with this structure, the balance spring provides a preload force in the opposite direction to the pressure regulating spring, thereby setting the valve core opening threshold. The valve core needs to be opened by overcoming the force of the balance spring, and the valve core can be closed when the knob is closed.
[0010] As an improvement, the inner diameter of the second mounting cavity is larger than that of the first mounting cavity. A second annular groove is provided on the end face of the second mounting cavity near the first mounting cavity, surrounding the first mounting cavity. The balance spring is located in the second annular groove. With this structure, the second annular groove provides a precise and stable mounting position for the balance spring, ensuring that the balance spring will not deviate during operation and guaranteeing the stable performance of its mechanical properties. This layout surrounding the first mounting cavity makes the structure more compact, makes full use of the limited space in the mounting base, and achieves a symmetrical distribution of force.
[0011] As an improvement, the knob includes a threaded part and a rotating part. One end of the threaded part is threaded to the inner wall of the second mounting cavity, and the other end of the threaded part is connected to the rotating part.
[0012] As an improvement, the second mounting cavity is located to the right of the first mounting cavity, and the right end of the second mounting cavity passes through the mounting base, with the knob threaded onto the inner wall of the second mounting cavity.
[0013] As an improvement, the bottom of the mounting base is connected to a connector for connecting a gas cylinder, which connects to the air intake. Attached Figure Description
[0014] Figure 1 This is a cross-sectional view of the present invention.
[0015] Figure 2 for Figure 1 A magnified view of part A in the middle.
[0016] Figure 3 This is a three-dimensional structural diagram of the present invention.
[0017] Reference numerals: 1. Mounting base; 2. First mounting cavity; 3. Second mounting cavity; 4. Inlet passage; 5. Outlet passage; 6. Valve core; 61. Valve stem; 7. Connecting block; 8. Knob; 81. Threaded part; 82. Rotating part; 9. Pressure adjusting spring; 10. First annular groove; 11. Sealing ring; 12. First protrusion; 13. Second protrusion; 14. Balance spring; 15. Second annular groove; 16. Connector. Detailed Implementation
[0018] The following is a detailed description of the flame gun exhaust structure of this utility model with reference to the accompanying drawings.
[0019] like Figures 1 to 3 As shown, a flame gun exhaust structure includes a mounting base 1, a valve core 6, a connecting block 7, a knob 8, and a pressure regulating spring 9. The mounting base 1 has a first mounting cavity 2, a second mounting cavity 3, an air inlet 4, and an air outlet 5. The first mounting cavity 2 and the second mounting cavity 3 are connected and distributed in the mounting base 1 in the left-right direction. The first mounting cavity 2 is connected to the air inlet 4, and the second mounting cavity 3 is connected to the air outlet 5.
[0020] Specifically, such as Figure 1 As shown, the second mounting cavity 3 is located to the right of the first mounting cavity 2. The right end of the second mounting cavity 3 passes through the mounting base 1. The bottom end of the mounting base 1 is connected to a connector 16 for connecting a gas cylinder. The connector 16 connects to the air inlet 4. The air inlet 4 is obliquely arranged below the first mounting cavity 2, while the air outlet 5 is obliquely arranged above the second mounting cavity 3.
[0021] like Figure 1As shown, the valve core 6 is connected in the first mounting cavity 2 and includes a valve stem 61 that slides in the left-right direction. The intake passage 4 is connected to the second mounting cavity 3 through the valve core 6 by sliding the valve stem 61. In this embodiment, when the valve stem 61 is at the right limit position, the valve core 6 is closed. When the valve stem 61 moves to the left, the valve core 6 is open, and the opening degree of the valve core 6 is proportional to the leftward displacement of the valve stem 61. The specific structure and working principle of the valve core 6 are existing technologies and will not be described in detail here.
[0022] like Figure 1 and Figure 2 As shown, the connecting block 7 is slidably connected to the second mounting cavity 3 in the left-right direction and connected to the valve stem 61. Specifically, the right end of the valve stem 61 is inserted into the left end face of the connecting block 7, and the air outlet 5 is located on the left side of the connecting block 7. In addition, the outer peripheral wall of the connecting block 7 is provided with a first annular groove 10 in the circumferential direction, and a sealing ring 11 is connected in the first annular groove 10. The sealing ring 11 slides and seals with the inner wall of the second mounting cavity 3.
[0023] like Figure 1 As shown, the knob 8 is threadedly connected to the mounting base 1. By rotating the knob 8, the knob 8 can be moved closer to or further away from the connecting block 7. Specifically, the knob 8 is located on the right side of the connecting block 7 and is threadedly connected to the inner wall of the second mounting cavity 3. The knob 8 includes a threaded part 81 and a rotating part 82. One end of the threaded part 81 is threadedly connected to the inner wall of the second mounting cavity 3, and the other end of the threaded part 81 is connected to the rotating part 82. The rotating part 82 is located outside the mounting base 1.
[0024] like Figure 1 and Figure 2 As shown, the pressure regulating spring 9 is located in the second mounting cavity 3 and abuts against the connecting block 7 and the knob 8; the connecting block 7 has a first protrusion 12 on its end face facing the knob 8, and the knob 8 has a second protrusion 13 on its end face facing the connecting block 7. The two ends of the pressure regulating spring 9 are respectively sleeved on the first protrusion 12 and the second protrusion 13. Specifically, the left end face of the threaded part 81 has an inner hole, and the second protrusion 13 is located on the right end face of the inner hole.
[0025] like Figure 1 and Figure 2 As shown, a balance spring 14 is provided between the end face of the connecting block 7 away from the pressure regulating spring 9 and the inner wall of the second mounting cavity 3; specifically, the inner diameter of the second mounting cavity 3 is larger than the inner diameter of the first mounting cavity 2, and a second annular groove 15 is provided on the end face of the second mounting cavity 3 near the first mounting cavity 2, which surrounds the first mounting cavity 2. The balance spring 14 is located in the second annular groove 15, and the air outlet 5 is directly connected to the second annular groove 15.
[0026] By rotating knob 8 to compress pressure regulating spring 9, the spring force pushes connecting block 7 towards the first mounting cavity 2, causing valve stem 61 to move and thus open valve core 6. Gas flows out from outlet 5 through intake duct 4, valve core 6, and second mounting cavity 3. The pressure of the outflowing gas acts on connecting block 7, generating a force opposite to the spring force of pressure regulating spring 9. When the outlet pressure is greater than the spring force, it causes connecting block 7 to move towards pressure regulating spring 9, further compressing pressure regulating spring 9 to balance outlet pressure with spring force, reducing valve core 6 opening and restricting airflow. When the outlet pressure is less than the spring force, it causes connecting block 7 to move away from pressure regulating spring 9, further stretching pressure regulating spring 9 to balance outlet pressure with spring force, increasing valve core 6 opening and increasing airflow. This allows the flame gun's outlet structure to adapt to changes in air pressure, enabling the flame gun to ignite and be used normally under low pressure, high pressure, and when inverted.
[0027] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above-described embodiment. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.
Claims
1. A flamethrower exhaust structure, characterized in that, include: Mounting base (1), the mounting base (1) is provided with a first mounting cavity (2), a second mounting cavity (3), an air inlet (4) and an air outlet (5). The first mounting cavity (2) and the second mounting cavity (3) are connected and distributed in the mounting base (1) in the left and right direction. The first mounting cavity (2) is connected to the air inlet (4) and the second mounting cavity (3) is connected to the air outlet (5). The valve core (6) is connected in the first mounting cavity (2) and includes a valve stem (61) that is slidably disposed in the left and right direction. By sliding the valve stem (61), the intake passage (4) is connected to the second mounting cavity (3) through the valve core (6). The connecting block (7) is slidably connected in the second mounting cavity (3) in the left and right direction and connected to the valve stem (61); A knob (8) is threaded onto the mounting base (1). By rotating the knob (8), the knob (8) can be moved closer to or further away from the connecting block (7). The pressure regulating spring (9) is located in the second mounting cavity (3) and abuts against the connecting block (7) and the knob (8).
2. The flamethrower exhaust structure according to claim 1, characterized in that, The outer peripheral wall of the connecting block (7) is provided with a first annular groove (10) along the circumferential direction. A sealing ring (11) is connected in the first annular groove (10). The sealing ring (11) slides and seals with the inner wall of the second mounting cavity (3).
3. The flamethrower exhaust structure according to claim 1, characterized in that, The connecting block (7) has a first protrusion (12) on its end face facing the knob (8), and the knob (8) has a second protrusion (13) on its end face facing the connecting block (7). The two ends of the adjusting spring (9) are respectively sleeved on the first protrusion (12) and the second protrusion (13).
4. The flamethrower exhaust structure according to claim 1, characterized in that, A balance spring (14) is provided between the end face of the connecting block (7) away from the pressure regulating spring (9) and the inner wall of the second mounting cavity (3).
5. The flamethrower exhaust structure according to claim 4, characterized in that, The inner diameter of the second mounting cavity (3) is larger than the inner diameter of the first mounting cavity (2). A second annular groove (15) is provided on the end face of the second mounting cavity (3) and near the first mounting cavity (2), surrounding the first mounting cavity (2). The balance spring (14) is located in the second annular groove (15).
6. The flamethrower exhaust structure according to claim 1, characterized in that, The knob (8) includes a threaded part (81) and a rotating part (82). One end of the threaded part (81) is threaded to the inner wall of the second mounting cavity (3), and the other end of the threaded part (81) is connected to the rotating part (82).
7. The flamethrower exhaust structure according to claim 1, characterized in that, The second mounting cavity (3) is located to the right of the first mounting cavity (2), and the right end of the second mounting cavity (3) passes through the mounting base (1). The knob (8) is threaded onto the inner wall of the second mounting cavity (3).
8. The flamethrower exhaust structure according to claim 1, characterized in that, The bottom end of the mounting base (1) is connected to a connector (16) for connecting a gas cylinder, and the connector (16) is connected to the air inlet (4).