Fluid regulating structure and negative pressure valve for gas generator

Abstract

The utility model relates to the field of negative pressure valve discloses a fluid regulating structure and negative pressure valve for gas generator. Its including valve body and conversion knob assembly, is equipped with the air inlet channel, the air outlet channel and the air outlet that communicate with each other on the valve body, the air inlet channel and the air outlet channel all are equipped with air inlet end and air outlet end, and the air outlet is located the air outlet end of air outlet channel. Conversion knob assembly is located between the air outlet channel and the air outlet, and conversion knob assembly is rotatably connected with the valve body, and one side of conversion knob assembly is exposed to the outside of valve body for rotating, and the other side is inserted in the valve body for adjusting the size of the communication port when the air outlet channel and the air outlet are communicated. The utility model only needs to rotate the rotary knob, can adjust the size of the aperture when the gas is discharged from the valve body, does not need to additionally dismount the valve body and replace the nozzle pipe, and the switching and adjusting are simple, convenient and easy to operate, can slightly adjust the liquefied gas supply, is more accurate control liquefied gas output, and improves the sealing effect.

Description

Technical Field

[0001] This utility model relates to the field of negative pressure valve technology, and more specifically, to a fluid regulating structure and a negative pressure valve for a gas generator. Background Technology

[0002] Existing gas generators are typically equipped with a negative pressure valve to regulate gas pressure and ensure stable generator operation. A nozzle pipe is threaded onto this valve, and this nozzle pipe connects to a gas hose for gas delivery. Gas generators can use either natural gas or liquefied petroleum gas (LPG). Due to differences in specific gravity, pressure, and flow characteristics between natural gas and LPG, the required nozzle pipe inner diameters differ. LPG requires a finer orifice to prevent incomplete combustion, while natural gas, with its lower pressure, requires a larger orifice diameter to meet combustion requirements.

[0003] The existing gas negative pressure valve cannot be adapted to both natural gas and liquefied petroleum gas (LPG). Therefore, when changing the gas from natural gas to LPG, the operator needs to first disconnect the hose connected to the nozzle pipe, then disconnect the nozzle pipe and replace it with a nozzle pipe with a smaller inner diameter that is compatible with LPG, and then reinstall the hose. The whole process is quite cumbersome and not convenient to operate. Utility Model Content

[0004] To address at least one of the aforementioned problems, this utility model first provides a fluid regulation structure, including a valve body and a switching knob assembly. The valve body has an inlet channel, an outlet channel, and an outlet that are interconnected. The switching knob assembly is rotatably connected to the valve body and includes a rotary knob and an adjusting baffle. The rotary knob is exposed outside the valve body for rotation, and the adjusting baffle is inserted into the valve body and located at the outlet end of the outlet channel. The adjusting baffle has liquefied gas communicating with the outlet channel and the outlet. The liquefied gas orifice has a diameter smaller than the inner diameter of the gas outlet channel. The adjusting baffle is fixedly connected to the rotary knob. When liquefied gas is introduced, the rotary knob is driven to rotate the adjusting baffle, which blocks the gas outlet end of the gas outlet channel. The liquefied gas then flows from the gas outlet channel to the gas outlet through the liquefied gas orifice. When natural gas is introduced, the rotary knob is driven to rotate the adjusting baffle so that the adjusting baffle does not block the gas outlet end of the gas outlet channel, and the natural gas flows directly from the gas outlet channel to the gas outlet.

[0005] Optionally, the valve body is provided with a mounting cavity, which is located at the air outlet end of the air outlet channel. Both the air outlet channel and the air outlet are connected to the mounting cavity. The adjusting baffle is located inside the mounting cavity, and the end of the rotary knob near the adjusting baffle is rotatably inserted into the mounting cavity.

[0006] Optionally, the outer wall of the rotary knob is provided with a sealing groove, and a sealing ring is provided in the sealing groove. The outer peripheral wall of the sealing ring abuts against the cavity wall of the mounting cavity.

[0007] Optionally, the outer wall of the rotary knob is provided with a rotary annular groove, which is located in the mounting cavity. A limit bolt is threadedly installed on the outer wall of the valve body, and the threaded end of the limit bolt is inserted into the rotary annular groove to lock the rotary knob when it is pulled out.

[0008] Optionally, the adjusting baffle has an adjusting hole on the side where the liquefied gas hole is opened. The adjusting hole is adapted to communicate with the gas outlet channel. The rotary knob has a threaded adjusting groove that communicates with the adjusting hole. An adjusting rod is threadedly installed in the threaded adjusting groove. One end of the adjusting rod is inserted into the adjusting hole to block the adjusting hole or adjust the size of the opening when the adjusting hole communicates with the gas inlet channel.

[0009] Optionally, the rotary knob has a mounting hole on the side away from the adjusting baffle, the threaded adjusting groove is located at the end of the mounting hole near the adjusting baffle, the mounting hole communicates with the threaded adjusting groove, and the diameter of the mounting hole is larger than the diameter of the threaded adjusting groove. The end of the adjusting rod away from the adjusting baffle is located in the mounting hole, and an O-ring is fitted on the side of the adjusting rod away from the adjusting baffle, with the outer peripheral wall of the O-ring abutting against the wall of the mounting hole.

[0010] Optionally, the valve body is provided with a diaphragm cavity, and the air outlet end of the air inlet channel and the air inlet end of the air outlet channel are both connected to the diaphragm cavity. The diaphragm cavity is provided with a valve plug assembly, which is adapted to block or open the air outlet end of the air inlet channel.

[0011] Optionally, the valve plug assembly includes a rotating frame, an elastic element, a rubber valve plug, and a valve plug pressure plate. The rotating frame is rotatably connected to the valve body. The rubber valve plug is located on the side of the rotating frame near the outlet end of the air intake channel and is connected to the rotating frame. The elastic element is located on the side of the rotating frame away from the rubber valve plug. Under normal pressure, it drives the rotating frame to rotate the rubber valve plug to block the outlet end of the air intake channel. The valve plug pressure plate is located on the side of the rubber valve plug away from the air intake channel and abuts against the rubber valve plug to apply pressure to the rubber valve plug.

[0012] Optionally, the membrane cavity is a hexagonal chamber.

[0013] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0014] 1. When natural gas or liquefied gas is introduced, under the same pressure value, the size of the orifice from which the gas is discharged from the valve body can be adjusted simply by turning the rotary knob. There is no need to disassemble the valve body or replace the nozzle tube. The switching and adjustment are simple and convenient.

[0015] 2. Different liquefied petroleum gas (LPG) components may have slight variations in content, requiring different LPG orifice diameters. Rotating the adjusting rod allows for adjustment of the orifice size, enabling some LPG to flow through the orifice to the outlet. This effectively increases the orifice diameter, allowing for minute adjustments to the LPG supply and more precise control of LPG output.

[0016] 3. During the processing of the valve body, the surface of the air outlet end of the air inlet channel will have errors. However, relying solely on the rubber valve plug to block these errors will result in poor density at the error points due to the lack of support for the rubber valve plug. In contrast, the valve plug pressure plate can provide rigid support and limit for the rubber valve plug. Under the action of the elastic element and the valve plug pressure plate, the rubber valve plug can improve the sealing effect and enhance the sealing at the error points.

[0017] 4. The hexagonal cavity design of the leather mold cavity is larger in volume than the existing circular cavity design, and the output pressure is more stable.

[0018] In addition, this utility model provides a negative pressure valve for a gas generator, including the fluid regulating structure described above.

[0019] Compared with the prior art, the negative pressure valve for gas generators described in this utility model has the same advantages as the fluid regulation structure described above, which will not be repeated here. Attached Figure Description

[0020] Figure 1 This is a cross-sectional view of the fluid regulating structure in an embodiment of the present invention (the arrow in the figure indicates the direction of gas flow).

[0021] Figure 2 This is a cross-sectional view of the embodiment of the present invention when liquefied gas is introduced (the arrow in the figure indicates the direction of gas flow).

[0022] Figure 3 This is a cross-sectional view of natural gas being introduced in an embodiment of this utility model (the arrow in the figure indicates the direction of gas flow).

[0023] Figure 4 This is an exploded view of the valve body and the switching knob assembly in an embodiment of this utility model;

[0024] Figure 5 This is an exploded view of the valve plug assembly in an embodiment of this utility model;

[0025] Figure 6 for Figure 1 Enlarged view of section A;

[0026] Figure 7 This is an exploded view of the conversion knob assembly in an embodiment of this utility model;

[0027] Figure 8 This is a partial enlarged cross-sectional view of an embodiment of this utility model.

[0028] Explanation of reference numerals in the attached drawings: 1. Valve body; 11. Inlet passage; 12. Outlet passage; 13. Outlet port; 14. Outlet connector; 15. Diaphragm chamber; 16. Diaphragm; 17. Top cover; 18. Mounting cavity; 19. Threaded hole; 191. Limit bolt; 2. Conversion knob assembly; 21. Rotary knob; 211. Rotary annular groove; 212. Mounting socket; 213. Threaded adjustment groove; 22. Adjustment baffle; 221. Liquefied gas port; 222. Adjustment hole; 23. Sealing ring; 24. Adjustment rod; 241. O-ring; 3. Valve plug assembly; 31. Rotating frame; 32. Elastic element; 33. Rubber valve plug; 34. Valve plug pressure plate; 35. Connecting column. Detailed Implementation

[0029] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the following description is provided in conjunction with the appendix. Figure 1-8 This application will be described in further detail.

[0030] The accompanying drawings of this utility model embodiment provide a coordinate system XYZ, where the positive direction of the X-axis represents the right, the negative direction of the X-axis represents the left, the positive direction of the Y-axis represents the front, the negative direction of the Y-axis represents the back, the positive direction of the Z-axis represents the top, and the negative direction of the Z-axis represents the bottom.

[0031] In a first aspect, embodiments of this utility model provide a fluid regulation structure, referring to... Figures 1 to 3 The fluid regulation structure includes a valve body 1 and a switching knob assembly 2. The valve body 1 has an interconnected inlet channel 11, an outlet channel 12, and an outlet 13. Both the inlet channel 11 and the outlet channel 12 have an inlet end and an outlet end, and the outlet 13 is located at the outlet end of the outlet channel 12. Fluid (gas or liquid) enters from the inlet end of the inlet channel 11; it enters the inlet end of the outlet channel 12 from the outlet end of the inlet channel 11, and then exits from the outlet end of the outlet channel 12 into the outlet 13. The switching knob assembly 2 is located between the outlet channel 12 and the outlet 13. The switching knob assembly 2 is rotatably connected to the valve body 1. One side of the switching knob assembly 2 is exposed outside the valve body 1 for rotation; the other side is inserted into the valve body 1 to adjust the size of the connection when the outlet channel 12 and the outlet 13 are connected, thus adapting to both natural gas and liquefied petroleum gas (LPG) use.

[0032] A gas outlet connector 14 is threadedly installed at the gas outlet 13. The gas outlet connector 14 can be connected to a pipeline, and the other end of the pipeline is connected to a generator to transport natural gas or liquefied gas.

[0033] Reference Figures 1 to 4 The valve body 1 has a diaphragm cavity 15 at its top. The diaphragm cavity 15 is a hexagonal chamber, which has a larger volume than the existing circular chambers and provides more stable output pressure. The air outlet of the air inlet channel 11 and the air inlet of the air outlet channel 12 are both connected to the diaphragm cavity 15. A diaphragm 16 is provided in the diaphragm cavity 15, which covers the opening at the top of the diaphragm cavity 15. A top cover 17 is bolted to the top of the diaphragm 16, and the top cover 17 presses the diaphragm 16 tightly to the valve body 1. A pressure chamber is spaced between the top cover 17 and the diaphragm 16. The diaphragm 16 divides the pressure chamber and the diaphragm cavity 15 into upper and lower chambers. The diaphragm 16 will deform and bend upwards or downwards according to the pressure difference between the pressure chamber and the diaphragm cavity 15.

[0034] Combination Figure 1 Reference Figures 4 to 6 A valve plug assembly 3 is provided inside the diaphragm cavity 15. The valve plug assembly 3 is suitable for blocking or opening the outlet end of the air intake channel 11. The valve plug assembly 3 includes a rotating frame 31, an elastic element 32, a rubber valve plug 33, and a valve plug pressure plate 34. The rotating frame 31 is rotatably mounted in the diaphragm cavity 15 at its middle position via a rotating shaft. The elastic element 32 is a spring, located on the side of the rotating frame 31 away from the outlet end of the air intake channel 11. One end of the elastic element 32 abuts against the cavity wall of the diaphragm cavity 15 away from the top opening; the other end abuts against the rotating frame 31, driving the rotating frame 31 to rotate and causing the rotating frame 31 to abut against the diaphragm 16. A groove is provided on the side of the rotating frame 31 near the outlet end of the air intake channel 11. A rubber connecting post 35 is integrally formed on the top of the rubber valve plug 33, and the connecting post 35 is interference-fitted into the groove. The outer diameter of the rubber valve plug 33 is larger than the inner diameter of the outlet end of the intake channel 11. When the diaphragm cavity 15 is under normal pressure, after the elastic element 32 drives the rotating frame 31 to rotate, the side of the rubber valve plug 33 away from the connecting post 35 can block and seal the entire outlet opening of the intake channel 11. The valve plug pressure plate 34 is made of insulating material and is made of a high-density material that is not easily deformed. The weight of the valve plug pressure plate 34 is greater than that of the rubber valve plug 33. The valve plug pressure plate 34 is located on the side of the rubber valve plug 33 where the connecting post 35 is located, and it contacts and fits against the rubber valve plug 33 to provide rigid support for the rubber valve plug 33. The outer diameter of the valve plug pressure plate 34 is larger than the inner diameter of the outlet end of the intake channel 11. The valve plug pressure plate 34 has an assembly groove, and the connecting post 35 is interference-fitted into the assembly groove. Both the rubber valve plug 33 and the valve plug pressure plate 34 rotate synchronously with the rotating frame 31. The rotating frame 31 has an integrally formed hemispherical protrusion on the side near the valve plug pressure plate 34, which presses against the valve plug pressure plate 34. The rubber valve plug 33 can improve the compression sealing effect and improve the sealing at the machining error by cooperating with the elastic element 32, the valve plug pressure plate 34 and the hemispherical protrusion.

[0035] Combination Figure 1 Reference Figures 4 to 6 When the generator is running, the diaphragm cavity 15 is under negative pressure. The diaphragm 16 bends towards the diaphragm cavity 15, causing the rotating frame 31 to move down on the side that abuts against the elastic element 32 and compress the elastic element 32. At this time, the other side of the rotating frame 31 drives the rubber valve plug 33 and the valve plug pressure plate 34 to rotate, which does not block the outlet end of the intake passage 11, allowing the combustion gas to enter the diaphragm cavity 15 and then enter the outlet passage 12. When the engine stops running, the diaphragm cavity 15 returns to normal pressure, the diaphragm 16 bends back towards the pressure chamber, and the rotating frame 31 rotates back to its original position under the action of the elastic element 32 to seal the outlet end of the intake passage 11.

[0036] The valve body 1 is provided with a mounting cavity 18, which is located at the air outlet end of the air outlet channel 12. Both the air outlet channel 12 and the air outlet 13 are connected to the mounting cavity 18. An opening is provided on one side of the mounting cavity 18, and the conversion knob assembly 2 is rotatably inserted into the mounting cavity 18 through the opening on one side of the mounting cavity 18.

[0037] Combination Figure 1 Reference Figures 4 to 8 The conversion knob assembly 2 includes a rotary knob 21 and an adjusting baffle 22, which are integrally formed. The adjusting baffle 22 is rotatably inserted into the mounting cavity 18, and the end of the rotary knob 21 near the adjusting baffle 22 is rotatably inserted into the mounting cavity 18; the side of the rotary knob 21 away from the adjusting baffle 22 protrudes from the mounting cavity 18 and is exposed to the outside of the valve body 1 for user rotation and adjustment. The adjusting baffle 22 can block the gas outlet end of the gas outlet channel 12. The adjusting baffle 22 has a liquefied gas hole 221 that penetrates through it, and both the gas outlet channel 12 and the gas outlet 13 are connected to the liquefied gas hole 221. The diameter of the liquefied gas hole 221 is smaller than the inner diameter of the outlet end of the gas outlet channel 12. When liquefied petroleum gas (LPG) is introduced, the rotary knob 21 drives the adjusting baffle 22 to rotate, which blocks the outlet end of the gas outlet channel 12. The LPG then flows from the gas outlet channel 12 to the outlet 13 through the LPG port 221. When natural gas is introduced, the rotary knob 21 drives the adjusting baffle 22 to rotate, so that the adjusting baffle 22 does not block the outlet end of the gas outlet channel 12. The natural gas then flows directly from the gas outlet channel 12 to the outlet 13.

[0038] Combination Figure 4 Reference Figures 7 to 8The rotary knob 21 has a sealing groove on the outer wall of the mounting cavity 18. A sealing ring 23 is fitted inside the sealing groove, and the outer peripheral wall of the sealing ring 23 abuts against the cavity wall of the mounting cavity 18, thus sealing the surface and preventing gas leakage from the rotary knob 21. Simultaneously, this provides a damping effect to the rotary knob 21, preventing it from rotating on its own due to vibration or gas pressure in the gas outlet channel 12 after manual adjustment. To further improve the sealing performance, two sealing grooves are spaced apart, each containing a sealing ring 23, forming a double-sealed structure.

[0039] A threaded hole 19 is provided on one side of the cavity wall of the mounting cavity 18, and the threaded hole 19 penetrates the wall thickness of the corresponding side of the valve body 1 along the opening direction. A limit bolt 191 is inserted into the threaded hole 19, and the limit bolt 191 is installed in the threaded hole 19 from the outer wall of the valve body 1. A rotating annular groove 211 is provided on the outer wall of the rotary knob 21, and the rotating annular groove 211 is located in the mounting cavity 18. The threaded end of the limit bolt 191 is inserted into the rotating annular groove 211, so that the movement of the rotary knob 21 in the direction of pulling out and inserting from the mounting cavity 18 is limited, but the rotation of the rotary knob 21 is not affected.

[0040] Combination Figure 1 Reference Figures 4 to 8 An adjustment hole 222 is provided on the side of the adjustment baffle 22 where the liquefied gas port 221 is located. The adjustment hole 222 also penetrates the adjustment baffle 22, so that both the gas outlet 13 and the gas outlet passage 12 are connected to the adjustment hole 222. A mounting hole 212 is provided on the side of the rotary knob 21 away from the adjustment baffle 22. A threaded adjustment groove 213 is provided at the end of the mounting hole 212 near the adjustment baffle 22. The threaded adjustment groove 213 is connected to the adjustment hole 222, and the inner diameter of the threaded adjustment groove 213 is smaller than the diameter of the mounting hole 212. An adjustment rod 24 is threadedly installed in the threaded adjustment groove 213. The end of the adjustment rod 24 near the adjustment baffle 22 is inserted into the adjustment hole 222 to block the adjustment hole 222, or to adjust the size of the opening when the adjustment hole 222 is connected to the air inlet passage 11. That is, different liquefied petroleum gas (LPG) component ratios will have slight deviations, requiring different orifice diameters for LPG orifice 221. Rotating the adjusting rod 24 adjusts the size of the adjusting orifice 222, allowing some LPG to flow through the adjusting orifice 222 to the outlet 13. This is equivalent to increasing the orifice diameter of LPG orifice 221, enabling minute adjustments to the LPG supply and more precise control of LPG output. The other end of the adjusting rod 24 is located inside the mounting hole 212. An annular groove is formed on the portion of the adjusting rod 24 located in the mounting hole 212, and an O-ring 241 is fitted inside the annular groove. The outer peripheral wall of the O-ring 241 abuts against the hole wall of the mounting hole 212 to form a seal, preventing gas leakage.

[0041] The end of the adjusting rod 24 located inside the mounting hole 212 has a drive groove. When it is necessary to rotate the adjusting rod 24 to adjust the size of the opening when the adjusting hole 222 is connected to the air intake channel 11, the corresponding screwdriver or the corresponding drive tool can be inserted into the drive groove to turn the adjusting rod 24.

[0042] The implementation principle of a fluid regulation structure in this application embodiment is as follows: the inlet end of the inlet channel 11 is connected to the gas source through a pipeline; the outlet 13 is connected to the generator through a pipeline. Natural gas or liquefied petroleum gas (LPG) enters the valve body 1 from the inlet end of the inlet channel 11; it enters the diaphragm chamber 15 from the outlet end of the inlet channel 11; then it enters the outlet channel 12; and then it enters the generator from the outlet 13 from the outlet end of the outlet channel 12. When LPG is introduced, the rotary knob 21 drives the adjusting baffle 22 to rotate, and the adjusting baffle 22 blocks the outlet end of the outlet channel 12, allowing the LPG to flow from the outlet channel 12 to the outlet 13 through the LPG hole 221. When natural gas is introduced, the rotary knob 21 drives the adjusting baffle 22 to rotate so that the adjusting baffle 22 does not block the outlet end of the outlet channel 12, and the natural gas flows directly from the outlet channel 12 to the outlet 13.

[0043] Different liquefied petroleum gas (LPG) component ratios may have slight deviations, requiring different orifice diameters for LPG orifice 221. Rotating the adjusting rod 24 can adjust the size of the adjusting orifice 222, allowing some LPG to flow through the adjusting orifice 222 to the outlet 13. This is equivalent to increasing the orifice diameter of LPG orifice 221, enabling minute adjustments to the LPG supply and more precise control of LPG output.

[0044] Secondly, another embodiment of the present invention provides a negative pressure valve for a gas generator, including the fluid regulating structure described in the first aspect.

[0045] Similarly, the components included in the "components," "mechanisms," and "devices" of this disclosure can also be flexibly combined. They can be modularly produced according to actual needs and assembled as an independent module; or they can be assembled separately to form a module in this device. The division of the above-mentioned components in this disclosure is only one embodiment for ease of reading and is not intended to limit the scope of protection of this disclosure. Any technical solution that includes the above-mentioned components and has the same function should be understood as an equivalent technical solution of this disclosure.

[0046] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0047] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0048] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0049] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0050] It should be noted that when a component is referred to as "fixed to," "set on," "fixed to," or "mounted on" another component, it can be directly on the other component or there may be an intervening component. When a component is considered to be "connected to another component," it can be directly connected to the other component or there may be an intervening component. Furthermore, when a component is considered to be "fixedly connected" to another component, the connection can be detachable or non-detachable, such as through socketing, snap-fitting, integral molding, welding, etc., which are achievable in conventional technologies and will not be elaborated upon here.

[0051] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0052] The above embodiments are merely illustrative of several implementation methods of this disclosure, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of this disclosure, and these modifications and improvements all fall within the protection scope of this disclosure.

Claims

1. A fluid regulation structure, characterized in that: The system includes a valve body (1) and a rotary knob assembly (2). The valve body (1) has an inlet channel (11), an outlet channel (12), and an outlet (13) that are interconnected. The rotary knob assembly (2) is rotatably connected to the valve body (1). The rotary knob assembly (2) includes a rotary knob (21) and an adjusting baffle (22). The rotary knob (21) is exposed outside the valve body (1) for rotation. The adjusting baffle (22) is inserted into the valve body (1) and located at the outlet end of the outlet channel (12). The adjusting baffle (22) has a liquefied gas hole (221) that communicates with the outlet channel (12) and the outlet (13). The hole of the liquefied gas hole (221) is... The diameter is smaller than the inner diameter of the gas outlet channel (12), and the adjusting baffle (22) is fixedly connected to the rotary knob (21). When liquefied gas is introduced, the rotary knob (21) is driven to drive the adjusting baffle (22) to rotate, and the adjusting baffle (22) will block the gas outlet end of the gas outlet channel (12). The liquefied gas will flow from the gas outlet channel (12) to the gas outlet (13) through the liquefied gas hole (221). When natural gas is introduced, the rotary knob (21) is driven to drive the adjusting baffle (22) to rotate, so that the adjusting baffle (22) does not block the gas outlet end of the gas outlet channel (12), and the natural gas will flow directly from the gas outlet channel (12) to the gas outlet (13).

2. The fluid regulating structure according to claim 1, characterized in that: The valve body (1) is provided with an installation cavity (18), which is located at the air outlet end of the air outlet channel (12). The air outlet channel (12) and the air outlet (13) are both connected to the installation cavity (18). The adjusting baffle (22) is located inside the installation cavity (18), and the rotary knob (21) is rotatably inserted into the installation cavity (18) at one end near the adjusting baffle (22).

3. The fluid regulation structure according to claim 2, characterized in that: The outer wall of the rotary knob (21) is provided with a sealing groove, and a sealing ring (23) is provided in the sealing groove. The outer peripheral wall of the sealing ring (23) abuts against the cavity wall of the mounting cavity (18).

4. The fluid regulating structure according to claim 2, characterized in that: The outer wall of the rotary knob (21) is provided with a rotary annular groove (211), which is located in the mounting cavity (18). A limit bolt (191) is threadedly installed on the outer wall of the valve body (1). The threaded end of the limit bolt (191) is inserted into the rotary annular groove (211) to lock the rotary knob (21) when it is pulled out.

5. The fluid regulation structure according to claim 1, characterized in that: The adjusting baffle (22) has an adjusting hole (222) on one side of the liquefied gas hole (221). The adjusting hole (222) is adapted to communicate with the gas outlet channel (12). The rotary knob (21) has a threaded adjusting groove (213) that communicates with the adjusting hole (222). An adjusting rod (24) is threadedly installed in the threaded adjusting groove (213). One end of the adjusting rod (24) is inserted into the adjusting hole (222) to block the adjusting hole (222) or adjust the size of the opening when the adjusting hole (222) communicates with the gas inlet channel (11).

6. The fluid regulation structure according to claim 5, characterized in that: The rotary knob (21) has a mounting hole (212) on the side away from the adjusting baffle (22). The threaded adjusting groove (213) is located at the end of the mounting hole (212) near the adjusting baffle (22). The mounting hole (212) communicates with the threaded adjusting groove (213), and the diameter of the mounting hole (212) is larger than the diameter of the threaded adjusting groove (213). The end of the adjusting rod (24) away from the adjusting baffle (22) is located inside the mounting hole (212). An O-ring (241) is fitted on the side of the adjusting rod (24) away from the adjusting baffle (22). The outer peripheral wall of the O-ring (241) abuts against the wall of the mounting hole (212).

7. The fluid regulating structure according to any one of claims 1-6, characterized in that: The valve body (1) is provided with a diaphragm cavity (15). The air outlet end of the air inlet channel (11) and the air inlet end of the air outlet channel (12) are both connected to the diaphragm cavity (15). The diaphragm cavity (15) is provided with a valve plug assembly (3). The valve plug assembly (3) is adapted to block or open the air outlet end of the air inlet channel (11).

8. The fluid regulation structure according to claim 7, characterized in that: The valve plug assembly (3) includes a rotating frame (31), an elastic element (32), a rubber valve plug (33), and a valve plug pressure plate (34). The rotating frame (31) is rotatably connected to the valve body (1). The rubber valve plug (33) is located on the side of the rotating frame (31) near the outlet end of the air intake channel (11). The rubber valve plug (33) is connected to the rotating frame (31). The elastic element (32) is located on the side of the rotating frame (31) away from the rubber valve plug (33). Under normal pressure, it drives the rotating frame (31) to rotate the rubber valve plug (33) to block the outlet end of the air intake channel (11). The valve plug pressure plate (34) is located on the side of the rubber valve plug (33) away from the air intake channel (11) and abuts against the rubber valve plug (33) to apply pressure to the rubber valve plug (33).

9. The fluid regulating structure according to claim 7, characterized in that: The membrane cavity (15) is a hexagonal chamber.

10. A negative pressure valve for a gas generator, characterized in that, Includes the fluid regulation structure as described in any one of claims 1-9.

Images