An independent three-function composite exhaust valve

Abstract

This invention discloses an independent three-function composite exhaust valve, relating to the field of exhaust valve technology. It includes: an air guide valve and a valve core within the valve tube cavity; a pressure-holding spring is sleeved on the surface of the valve core; the valve core is slidably connected to the inner wall of the valve tube; exhaust grooves are formed at the upper and lower ends of the valve core and the inner wall of the valve tube; the pressure-holding spring is fixedly connected at both ends to the air guide valve and the valve core, respectively; bolts are threaded onto the inner wall of the exhaust pipe; a main vent pipe passes through the interior of a buffer valve; an air vent groove is formed along the axis inside the main vent pipe; air guide pipes are installed at both ends of the main vent pipe via connecting sleeves; an air vent is formed inside the buffer valve; the two ends of the air vent communicate with the air vent groove and the exhaust groove, respectively. This invention features a threaded line on the inner wall of the exhaust pipe, and the designed bolts are threaded onto the inner wall of the exhaust pipe to seal it. The sealed exhaust pipe prevents gas from flowing out from the exhaust groove and the inner cavity of the buffer groove, ensuring that the exhaust valve is not affected by the exhaust during the air intake process.

Description

Technical Field

[0001] This invention relates to the field of exhaust valve technology, and specifically to an independent three-function composite exhaust valve. Background Technology

[0002] As a key component in the air circuit system, the exhaust valve is widely used in massage chairs, medical rehabilitation equipment, airbag control devices, and other applications that require frequent exhaust switching and flow regulation.

[0003] In existing technologies, the control valves that are widely used usually open or close the air intake and exhaust channels by axially moving the valve core within the valve body. Its core function is to achieve the three functions of charging, pressure holding and exhaust.

[0004] However, in actual operation, this type of exhaust valve can usually only achieve simple switching between intake and exhaust. When existing equipment needs to install multiple exhaust valves, especially in the case of a structure in which intake and exhaust channels are set in the same valve body, the valve core is prone to mutual interference between intake and exhaust during the switching process, making it difficult for the exhaust valve to achieve a stable intermediate operating state. Summary of the Invention

[0005] The purpose of this invention is to provide an independent three-function composite exhaust valve to solve the technical problem that the valve core of the exhaust valve in the prior art is prone to mutual interference between intake and exhaust during the switching process.

[0006] The technical problem to be solved by this invention can be achieved through the following technical solution:

[0007] An independent three-function composite exhaust valve, comprising:

[0008] The valve tube has an air guide valve and a valve core inside. The valve tube is fixedly connected to the mounting bracket. The air guide valve is fixedly connected to the inner wall of the valve tube. A pressure holding spring is sleeved on the surface of the valve core. The valve core is slidably connected to the inner wall of the valve tube. The upper and lower ends of the valve core and the inner wall of the valve tube form an exhaust groove. The two ends of the pressure holding spring are fixedly connected to the air guide valve and the valve core, respectively.

[0009] A buffer valve is fixedly connected to the side end of the mounting bracket. The buffer valve has a buffer groove inside that communicates with the exhaust groove. An exhaust pipe that communicates with the inner cavity of the buffer groove is fixedly connected to the side end of the buffer valve. Bolts are threaded onto the inner wall of the exhaust pipe.

[0010] A venting main pipe is provided, which penetrates the interior of the buffer valve. A venting groove is provided inside the venting main pipe along the centerline. Air guide pipes are installed at both ends of the venting main pipe through connecting sleeves. A vent is provided inside the buffer valve, and the two ends of the vent are connected to the venting groove and the exhaust groove, respectively.

[0011] As a further embodiment of the present invention: the valve core has a receiving groove at one end near the buffer valve, and a plurality of air guide holes are formed inside the valve core along the axis. The valve core has a collecting hole at one end near the air guide valve along the axis. The two ends of the plurality of air guide holes are respectively connected to the inner cavity of the collecting hole and the inner cavity of the receiving groove. The air guide valve has a connecting hole along the axis, and the inner cavity of the connecting hole is connected to the inner cavity of the collecting hole.

[0012] As a further aspect of the present invention: the buffer valve has an annular buffer pad fixedly connected to one end near the valve core, the buffer pad being plastic and abutting against the inner wall of the receiving groove.

[0013] As a further aspect of the present invention: the air valve has two sets of guide plates fixedly connected to one end near the valve core, the curvature of the two sets of guide plates is equal to the curvature of the valve core, and guide grooves are respectively opened on both sides of the valve core, and the inner wall of the guide groove is slidably connected to the guide plate.

[0014] As a further embodiment of the present invention: the air guide tube is rotatably connected to the inner wall of the connecting sleeve, a flow guide seat is fixedly connected to the inner wall of the air guide tube, the side end of the air guide tube is abutted to the connecting sleeve through a sealing ring, an air groove is opened inside the air vent tube along the axis, an obstruction seat is fixedly connected to the inner wall of the air groove, the cross-section of the obstruction seat and the flow guide seat is triangular, and the obstruction seat and the flow guide seat fit together.

[0015] As a further embodiment of the present invention: the connecting sleeve has a rotating groove along the axis, and a rotating plate is fixedly connected to the top end of the air guide pipe.

[0016] As a further aspect of the present invention: a pointer is fixedly connected to the side end of the rotating plate, and scale values ​​are equidistantly marked on the surface of the connecting sleeve.

[0017] As a further embodiment of the present invention: the upper and lower ends of the connecting sleeve are respectively fixedly connected to limit plates, and the limit plates are located at the ends of the rotating groove.

[0018] As a further aspect of the present invention: an air outlet groove is provided inside the bolt along the centerline, and a plurality of air outlet holes are provided at equal intervals at the top of the bolt. The air outlet groove is connected to the inner cavity of the buffer groove, and the bolt is in contact with the inner wall of the exhaust pipe.

[0019] As a further aspect of the present invention: the bolt side end is fixedly connected to a nut by a sealing gasket, and the sealing gasket is abutting against the exhaust pipe side end.

[0020] The beneficial effects of this invention are:

[0021] 1. The present invention has a threaded line on the inner wall of the exhaust pipe, and the designed bolt is connected to the inner wall of the exhaust pipe by the thread to seal the exhaust pipe. The sealed exhaust pipe can prevent gas from flowing out from the inner cavity of the exhaust groove and the buffer groove, so that the exhaust valve is not affected by the exhaust during the intake process.

[0022] 2. The valve core blocks the vent, allowing gas to be stably discharged through the exhaust pipe. According to the above design of the present invention, the mutual interference between air intake and exhaust during valve core switching can be avoided, ensuring that the exhaust valve achieves a stable intermediate operating state.

[0023] 3. When a single exhaust valve malfunctions and cannot exhaust, the bolt does not need to be loosened from the inner wall of the exhaust pipe. If this technical feature is missing, the air pressure inside the exhaust groove and buffer groove is equal to the air pressure outside the device. The air pressure inside the device is greater than the air pressure inside the exhaust groove and buffer groove, and the device will squeeze the exhaust valve, causing further damage to the exhaust valve.

[0024] 4. When different exhaust valves are used for venting, the corresponding exhaust pipes can be used for venting, and the bolts can be used to block the exhaust pipes, so that different exhaust valves can vent simultaneously or sequentially.

[0025] 5. When the exhaust valve is venting, the gas in the device first enters the exhaust groove and the inner cavity of the buffer groove. The inner cavity of the buffer groove can buffer the exhaust from the exhaust valve. When the technical feature of the buffer groove is missing, the gas will be discharged directly through the exhaust pipe, which will cause noise when the gas first flows out of the exhaust pipe. Attached Figure Description

[0026] The invention will now be further described with reference to the accompanying drawings.

[0027] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0028] Figure 2 This is a top view of the overall structure of the present invention;

[0029] Figure 3 For the present invention Figure 2 Overall structural AA section view;

[0030] Figure 4 For the present invention Figure 2 Overall structural BB section view;

[0031] Figure 5 For the present invention Figure 3 Enlarged schematic diagram of the structure at point D;

[0032] Figure 6 This is a schematic diagram of the connecting sleeve structure of the present invention;

[0033] Figure 7 This is a schematic diagram of the valve core structure of the present invention;

[0034] Figure 8 This is a left view of the valve core structure of the present invention;

[0035] Figure 9 For the present invention Figure 8 CC section view of valve core structure;

[0036] Figure 10 This is a left view of the air valve structure of the present invention;

[0037] Figure 11 This is a left view of the obstruction seat and flow guide seat structure of the present invention;

[0038] Figure 12 This is a left view of the bolt structure of the present invention.

[0039] In the diagram: 1. Mounting bracket; 2. Valve pipe; 3. Air guide pipe; 4. Connecting sleeve; 5. Main air pipe; 6. Nut; 7. Exhaust pipe; 8. Buffer valve; 9. Air guide valve; 10. Valve core; 11. Pressure holding spring; 12. Air guide hole; 14. Collection hole; 15. Connecting hole; 16. Air groove; 17. Air vent; 18. Buffer pad; 19. Exhaust groove; 20. Buffer groove; 21. Obstruction seat; 22. Flow guide seat; 23. Sealing ring; 24. Rotating groove; 25. Pointer; 26. Rotating plate; 27. Limiting plate; 28. Receiving groove; 29. ​​Guide groove; 30. Guide plate; 31. Sealing gasket; 32. Bolt; 33. Air outlet; 34. Air outlet groove. Detailed Implementation

[0040] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] like Figure 1 - Figure 12As shown, an independent three-function composite exhaust valve includes: a valve pipe 2, a buffer valve 8, and a vent pipe 5. The valve pipe 2 has an inner cavity equipped with a guide valve 9 and a valve core 10. The valve pipe 2 is fixedly connected to a mounting bracket 1. The guide valve 9 is fixedly connected to the inner wall of the valve pipe 2. A pressure-holding spring 11 is sleeved on the surface of the valve core 10. The valve core 10 is slidably connected to the inner wall of the valve pipe 2. The upper and lower ends of the valve core 10 and the inner wall of the valve pipe 2 form exhaust grooves 19. The two ends of the pressure-holding spring 11 are fixedly connected to the guide valve 9 and the valve core 10, respectively. The buffer valve 8 is fixedly connected to the side end of the mounting bracket 1. The buffer valve 8 has an inner cavity 20 communicating with the exhaust groove 19. The side end of the buffer valve 8 is fixedly connected to a device communicating with the inner cavity of the buffer groove 20. The exhaust pipe 7 has a bolt 32 threadedly connected to its inner wall. The vent pipe 5 passes through the interior of the buffer valve 8. The vent pipe 5 has a vent groove 16 along its axis inside. The two ends of the vent pipe 5 are connected to the air guide pipes 3 via connecting sleeves 4. The buffer valve 8 has an air port 17 inside. The two ends of the air port 17 are connected to the air groove 16 and the exhaust groove 19, respectively. When the device needs to be inflated through multiple exhaust valves, in order to avoid the time-consuming and laborious process of simultaneously aligning the existing inflation device with multiple exhaust valves, the inflation device is installed at the air inlet of two air guide pipes 3. The inflation device introduces gas into the inner cavity of the air guide pipe 3, and the air guide pipe 3 delivers the gas to the inner cavity of the vent pipe 5.

[0042] The main vent pipe 5 can deliver gas to the buffer valve 8. When the gas comes into contact with the valve core 10 through the vent 17, due to the gas pressure, the gas pushes the valve core 10 towards the air guide valve 9. The valve core 10 releases its blocking effect on the vent 17, and the valve core 10 is compressed by the pressure holding spring 11. When the valve core 10 and the air guide valve 9 come into contact, the valve core 10 and the pressure holding spring 11 stop moving. During this process, the gas enters the exhaust groove 19 and the inner cavity of the buffer groove 20 through the gap between the valve core 10 and the vent 17. When the gas is delivered into the device through the valve core 10 and the air guide valve 9 in sequence, the gas will flow from the valve... The gap between the core 10 and the vent 17 continuously allows gas to enter the inner cavity of the exhaust groove 19 and the buffer groove 20. The gas in the inner cavity of the exhaust groove 19 and the buffer groove 20 is affected by the air pressure and will flow out through the exhaust pipe 7. In this case, the exhaust valve will be interfered with by the exhaust. To avoid this situation, the present invention has a threaded line on the inner wall of the exhaust pipe 7. The designed bolt 32 is connected to the inner wall of the exhaust pipe 7 by the thread, thereby sealing the exhaust pipe 7. After sealing, the exhaust pipe 7 can prevent gas from flowing out from the inner cavity of the exhaust groove 19 and the buffer groove 20, so that the exhaust valve will not be affected by the exhaust during the air intake process.

[0043] When the device is filled with gas, the inflation device stops operating. At this time, no new gas will be added to the inner cavity of the vent pipe 5, and the gas pressure in the inner cavity of the vent pipe 5 will not hold the valve core 10. The elastic force of the pressure holding spring 11 holds the valve core 10 to move away from the air guide valve 9, and the valve core 10 blocks the vent 17. At this time, the gas will not flow back from the vent 17 to the inner cavity of the vent pipe 5. It should be noted that when the valve core 10 is held by the buffer valve 8 and thus blocks the vent 17, a gap appears between the valve core 10 and the air guide valve 9, and the gas in the device can communicate with the inner cavity of the exhaust groove 19 through the air guide valve 9.

[0044] When the device needs to exhaust gas, the bolt 32 is removed from the inner wall of the exhaust pipe 7. The bolt 32 releases its function of blocking the exhaust pipe 7, and the gas in the device can flow into the inner cavity of the exhaust pipe 7 in sequence through the air guide valve 9, the exhaust groove 19 and the buffer groove 20, and then be discharged through the exhaust pipe 7. During this process, since the valve core 10 blocks the air inlet 17, the gas can be discharged stably through the exhaust pipe 7. According to the above design of the present invention, the situation where the air intake and exhaust interfere with each other during the switching process of the valve core 10 can be avoided, ensuring that the exhaust valve achieves a stable intermediate operating state.

[0045] In actual use, multiple exhaust valves are mounted on the device via mounting bracket 1, and then the multiple exhaust valves are simultaneously vented through the vent header 5. However, when a single exhaust valve malfunctions and cannot vent, bolt 32 does not need to be removed from the inner wall of exhaust pipe 7. Without this technical feature, the air pressure inside the exhaust groove 19 and buffer groove 20 is equal to the air pressure outside the device, and the air pressure inside the device is greater than the air pressure inside the exhaust groove 19 and buffer groove 20. The device will squeeze the exhaust valve, causing further damage to the exhaust valve. It should be noted that when different exhaust valves vent, they can vent through the corresponding exhaust pipe 7, and bolt 32 can block the exhaust pipe 7, so that different exhaust valves can vent simultaneously or sequentially.

[0046] It should be noted that when the exhaust valve is venting, the gas in the device first enters the inner cavity of the exhaust groove 19 and the buffer groove 20. The inner cavity of the buffer groove 20 can buffer the exhaust of the exhaust valve. When the technical feature of the buffer groove 20 is missing, the gas will be discharged directly through the exhaust pipe 7, which will cause noise when the gas first flows out of the exhaust pipe 7.

[0047] In some specific embodiments, the valve core 10 has a receiving groove 28 at one end near the buffer valve 8, and a plurality of air guide holes 12 are formed along the axis inside the valve core 10. A collecting hole 14 is formed along the axis at one end of the valve core 10 near the air guide valve 9. The two ends of the plurality of air guide holes 12 are respectively connected to the inner cavity of the collecting hole 14 and the inner cavity of the receiving groove 28. The air guide valve 9 has a connecting hole 15 along the axis, and the inner cavity of the connecting hole 15 is connected to the inner cavity of the collecting hole 14. When gas presses against the valve core 10, the valve core 1... When the valve core 10 moves, in order to ensure that the gas enters the inner cavity of the valve core 10 better, the receiving groove 28 opened in the valve core 10 can guide the gas flow. Without this technical feature, when the gas enters the air guide hole 12, the gas will collide with the surface of the valve core 10 and enter the inner cavity of the exhaust groove 19 from the gap. In this invention, the gas flows out from the air vent 17 and enters the inner cavity of the receiving groove 28. The receiving groove 28 guides the gas flow and reduces the amount of gas flowing into the inner cavity of the exhaust groove 19 from the gap.

[0048] Gas flows along the inner cavity of several air guide holes 12, and then gathers at the collecting hole 14. Gas flows along the inner cavity of the collecting hole 14 into the inner cavity of the connecting hole 15. Finally, gas enters the device through the inner cavity of the connecting hole 15. When the valve core 10 and the air guide valve 9 come into contact, gas can flow sequentially along the receiving groove 28, the air guide holes 12, the collecting hole 14 and the connecting hole 15, thereby realizing a smooth air intake path for the exhaust valve.

[0049] In some specific embodiments, a ring-shaped buffer pad 18 is fixedly connected to one end of the buffer valve 8 near the valve core 10. The buffer pad 18 is plastic and abuts against the inner wall of the receiving groove 28. When the exhaust valve exhausts gas, the valve core 10 blocks the vent 17, only to prevent gas from flowing out of the vent 17. When the gas in the device is discharged through the inner cavity of the connecting hole 15, the gas will enter the inner cavity of the collecting hole 14, and then flow through the air guide hole 12 and the receiving groove 28 to the inner cavity of the buffer groove 20. In this case... In this case, the gas flows through multiple paths, and the shape of the air guide hole 12 of the present invention increases the path distance, which affects the gas discharge effect. Therefore, when the valve core 10 and the buffer valve 8 are pressed together, the buffer pad 18 is embedded in the inner wall of the receiving groove 28. Since the buffer pad 18 is plastic, the buffer pad 18 is squeezed and fills the receiving groove 28, and the buffer pad 18 blocks the receiving groove 28. At the same time, the buffer pad 18 blocks the air guide hole 12, thereby blocking the gas flow path along the collecting hole 14 and the air guide hole 12.

[0050] It should be noted that the valve core 10 is pushed by the elastic tension of the pressure-holding spring 11 and the air pressure inside the device, so that the valve core 10 can resist the buffer valve 8. Under the action of these two forces, the impact force of the valve core 10 on the buffer valve 8 increases, while the buffer pad 18 can buffer the impact force of the valve core 10, preventing the buffer valve 8 from buffering the valve core 10 by directly impacting it.

[0051] In some specific implementations, the air valve 9 has two sets of guide plates 30 fixedly connected to one end near the valve core 10. The curvature of the two sets of guide plates 30 is equal to that of the valve core 10. Guide grooves 29 are respectively opened on both sides of the valve core 10. The inner wall of the guide groove 29 is slidably connected to the guide plate 30. When the valve core 10 moves repeatedly in the valve tube 2, the pressure holding spring 11 will experience fatigue. In addition, when the exhaust valve is charging and venting, the impact of the gas on the valve core 10 will also cause the valve core 10 to deviate and rotate. When the valve core 10 deviates, the exhaust groove 19 and the buffer groove 20 between the valve core 10 and the inner wall of the valve tube 2 will be misaligned. In this case, when the exhaust valve is venting, the effective area of ​​the gas flowing from the inner cavity of the exhaust groove 19 to the inner cavity of the buffer groove 20 becomes smaller, which causes the exhaust path to be disturbed.

[0052] Therefore, the guide plate 30 designed in this invention can provide a limiting and guiding function for the movement of the air valve 9. The specific working principle is as follows: when the air valve 9 slides along the inner wall of the valve tube 2, the guide grooves 29 opened at both ends of the air valve 9 slide along the guide plate 30. The fit between the guide plate 30 and the inner wall of the guide groove 29 limits the movement of the air valve 9, preventing the air valve 9 from shifting and rotating within the valve tube 2, thereby ensuring that the exhaust valve achieves a stable intermediate operating state.

[0053] In some specific embodiments, the air guide pipe 3 is rotatably connected to the inner wall of the connecting sleeve 4, and a flow guide seat 22 is fixedly connected to the inner wall of the air guide pipe 3. The side end of the air guide pipe 3 is abutted to the connecting sleeve 4 through a sealing ring 23. An air vent groove 16 is opened along the axis inside the air vent main pipe 5, and an obstruction seat 21 is fixedly connected to the inner wall of the air vent groove 16. The cross-sections of the obstruction seat 21 and the flow guide seat 22 are triangular, and the obstruction seat 21 and the flow guide seat 22 fit together. When the exhaust valve of the present invention is used, the inflation device directly vents air into the air guide pipe 3. If the air pressure introduced by the inflation device is too high, the gas will directly impact the valve core 10. In order to slowly increase the air pressure in the inner cavity of the air vent main pipe 5 and avoid the gas directly impacting the valve core 10, the air vent main pipe 5 is designed to be ventilated. To prevent a significant impact on the valve core 10, this invention designs an obstruction seat 21 and a flow guide seat 22. By rotating the air guide pipe 3, the air guide pipe 3 rotates along with the flow guide seat 22, creating a misaligned ventilation area between the flow guide seat 22 and the obstruction seat 21. Gas can enter the inner cavity of the main ventilation pipe 5 through this misaligned ventilation area. As the air guide pipe 3 rotates at different angles, the misaligned ventilation area between the obstruction seat 21 and the flow guide seat 22 changes, and the amount of gas passing through this misaligned ventilation area also varies. Through this design, this invention can control the amount of gas entering the inner cavity of the main ventilation pipe 5, avoiding direct impact on the valve core 10 and allowing the valve core 10 to move smoothly within the valve pipe 2.

[0054] When the exhaust valve stops intake, the guide seat 22 resets. The guide seat 22 and the obstruction seat 21 seal the air inlets at both ends of the vent pipe 5 by fitting together. When the gas passes through the guide seat 22, the shape of the guide seat 22 can guide the gas through the misaligned ventilation area. When the gas flows along the surface of the obstruction seat 21 through the guide seat 22, the shape of the obstruction seat 21 can reduce the pressure of the gas on the surface of the obstruction seat 21.

[0055] In some specific implementations, the connecting sleeve 4 has a rotating groove 24 along its axis, a rotating plate 26 is fixedly connected to the top of the air guide pipe 3, a pointer 25 is fixedly connected to the side of the rotating plate 26, and scale values ​​are equidistantly marked on the surface of the connecting sleeve 4. Limiting plates 27 are fixedly connected to the upper and lower ends of the connecting sleeve 4, and the limiting plates 27 are located at the ends of the rotating groove 24. When the air guide pipe 3 rotates along the inner wall of the connecting sleeve 4, the rotating plate 26 seals the gap between the air guide pipe 3 and the connecting sleeve 4. The air guide pipe 3, along with the rotating plate 26, rotates along the inner wall of the rotating groove 24. The inner wall of the rotating groove 24 and the rotating plate 26 fit together to limit the air guide pipe 3. The rotating plate 26, along with the pointer 25, moves along the surface of the connecting sleeve 4. When the air guide pipe 3 rotates at different angles, the pointer 25 points to the scale value on the surface of the connecting sleeve 4, which can display the specific ventilation area value, so that the exhaust valve can accurately adjust the amount of gas entering the ventilation header 5.

[0056] When the rotating plate 26 rotates half a circle, the limiting plate 27 blocks the path of the rotating plate 26 and limits the rotating plate 26, so that the rotating plate 26 rotates within the path designed by the pointer 25.

[0057] In some specific embodiments, an air outlet groove 34 is formed inside the bolt 32 along its axis, and several air outlet holes 33 are formed at equal intervals at the top of the bolt 32. The air outlet groove 34 communicates with the inner cavity of the buffer groove 20. The bolt 32 fits against the inner wall of the exhaust pipe 7, and a nut 6 is fixedly connected to the side end of the bolt 32 through a sealing gasket 31. The sealing gasket 31 abuts against the side end of the exhaust pipe 7. When the exhaust valve of the present invention is used for exhaust, it releases the blocking effect of the bolt 32 on the exhaust pipe 7, and the gas is directly discharged through the exhaust pipe 7. For some devices... If the venting is too fast, it will affect the normal use of the device in the later stage. Therefore, the venting groove 34 in the inner cavity of the bolt 32 of the present invention is connected to the inner cavity of the buffer groove 20. When the bolt 32 rotates along the inner wall of the exhaust pipe 7, the venting holes 33 leak out from the exhaust pipe 7 in sequence. The gas in the inner cavity of the venting groove 34 flows out through the venting holes 33. In the present invention, the number of venting holes 33 leaking out from the exhaust pipe 7 can determine the effective area of ​​gas discharged from the exhaust pipe 7, thereby enabling the exhaust valve to accurately control the exhaust volume.

[0058] When bolt 32 blocks exhaust pipe 7, a gap is formed between exhaust pipe 7 and bolt 32. The sealing gasket 31 is squeezed by the resistance between nut 6 and exhaust pipe 7, and the sealing gasket 31 seals the gap between bolt 32 and exhaust pipe 7.

[0059] To facilitate understanding of the embodiments of this solution by those skilled in the art, the working principle of this solution is now comprehensively explained in conjunction with specific application scenarios:

[0060] When the device is inflated through multiple exhaust valves, the inflation device is simultaneously installed at the inlet of two air inlets 3. The inflation device introduces gas into the inner cavity of the air inlet 3, and the air inlet 3 delivers the gas to the inner cavity of the main air inlet 5. The main air inlet 5 can deliver the gas to the buffer valve 8 respectively. When the gas comes into contact with the valve core 10 through the air inlet 17, due to the air pressure, the gas pushes the valve core 10 against the air inlet 9 and moves it towards the air inlet valve 9. The valve core 10 releases its blocking effect on the air inlet 17, and the valve core 10 is compressed with the pressure holding spring 11. When the valve core 10 and the air inlet valve 9 are against each other, the valve core 10 stops moving with the pressure holding spring 11. At this time, the bolt 32 designed in this invention is connected to the inner wall of the exhaust pipe 7 by threads, thereby blocking the exhaust pipe 7. After being blocked, the exhaust pipe 7 can prevent gas from flowing out from the inner cavity of the exhaust groove 19 and the buffer groove 20, so that the exhaust valve is not affected by the exhaust during the air intake process.

[0061] Among the features of this invention are the triangular cross-section of the obstruction seat 21 and the flow guide seat 22. By rotating the air guide pipe 3, the flow guide seat 22 rotates with the air guide pipe 3. A misaligned ventilation area is generated between the flow guide seat 22 and the obstruction seat 21. Gas can enter the inner cavity of the air main pipe 5 through this misaligned ventilation area. The misaligned ventilation area between the obstruction seat 21 and the flow guide seat 22 changes with different rotation angles of the air guide pipe 3, and the amount of gas passing through this misaligned ventilation area also varies. Through this setting, this invention can control the amount of gas entering the inner cavity of the air main pipe 5, avoid direct impact on the valve core 10, and allow the valve core 10 to move smoothly within the valve pipe 2.

[0062] In order to precisely control the size of the ventilation area caused by the misalignment between the obstruction seat 21 and the guide seat 22, the air guide pipe 3, along with the rotating plate 26, rotates along the inner wall of the rotating groove 24. The inner wall of the rotating groove 24 and the rotating plate 26 fit together to limit the air guide pipe 3. The rotating plate 26, along with the pointer 25, moves along the surface of the connecting sleeve 4. When the air guide pipe 3 rotates at different angles, the pointer 25 points to the scale value on the surface of the connecting sleeve 4 to display the specific ventilation area value, so that the exhaust valve can accurately adjust the amount of gas entering the main ventilation pipe 5.

[0063] During the inflation process of the exhaust valve, the receiving groove 28 of the valve core 10 can guide the gas flow. Then, the gas flows along the inner cavity of several air guide holes 12 and is collected at the collecting hole 14. The gas flows along the inner cavity of the collecting hole 14 and enters the inner cavity of the connecting hole 15. Finally, the gas enters the device through the inner cavity of the connecting hole 15. When the valve core 10 and the air guide valve 9 come into contact, the gas can flow along the receiving groove 28, the air guide holes 12, the collecting hole 14 and the connecting hole 15 in sequence, thereby realizing a smooth air intake path for the exhaust valve. It should be noted that when the rotating plate 26 rotates half a turn, the limiting plate 27 blocks the rotation path of the rotating plate 26 and limits the rotating plate 26, so that the rotating plate 26 rotates within the path designed by the pointer 25.

[0064] When inflation ends, the valve core 10 needs to be reset to achieve the pressure-holding function of the exhaust valve. In this invention, when the valve core 10 is reset by the elastic tension of the pressure-holding spring 11, the buffer pad 18 is embedded in the inner wall of the receiving groove 28. Due to the plasticity of the buffer pad 18, it is compressed and fills the receiving groove 28, sealing the receiving groove 28. At the same time, the buffer pad 18 also seals the air guide hole 12. Simultaneously, the buffer pad 18 can buffer the impact force of the valve core 10, preventing the buffer valve 8 from directly impacting the valve core 10. Simultaneously, the guide seat 22 is reset, and the guide seat 22 and the obstruction seat 21, through their contact, seal the air inlets at both ends of the vent pipe 5.

[0065] When the exhaust valve is venting, bolt 32 is removed from the inner wall of exhaust pipe 7. Bolt 32 releases its function of blocking exhaust pipe 7, and the gas in the device can flow into the inner cavity of exhaust pipe 7 in sequence through air guide valve 9, exhaust groove 19 and buffer groove 20, and then be discharged through exhaust pipe 7. During this process, since valve core 10 blocks air inlet 17, gas can be discharged stably through exhaust pipe 7. Among them, gas first enters the inner cavity of exhaust groove 19 and buffer groove 20. The inner cavity of buffer groove 20 can buffer the exhaust of exhaust valve. When the technical feature of buffer groove 20 is missing, when gas is discharged directly through exhaust pipe 7, noise will occur when the gas first flows out of exhaust pipe 7.

[0066] In order for the exhaust valve to exhaust accurately, the vent groove 34 in the inner cavity of the bolt 32 of the present invention is connected to the inner cavity of the buffer groove 20. When the bolt 32 rotates along the inner wall of the exhaust pipe 7, the vent holes 33 leak out from the exhaust pipe 7 in sequence, and the gas in the inner cavity of the vent groove 34 flows out through the vent holes 33. In the present invention, the number of vent holes 33 leaking out from the exhaust pipe 7 can determine the effective area of ​​gas discharged from the exhaust pipe 7, thereby enabling the exhaust valve to accurately control the exhaust volume.

[0067] According to the above design of the present invention, the mutual interference between air intake and exhaust during the switching process of valve core 10 can be avoided, ensuring that the exhaust valve achieves a stable intermediate operating state.

[0068] The foregoing has described several embodiments of the present invention in detail, but these embodiments are not limited thereto and should not be considered as limiting the scope of the invention. All equivalent variations and improvements made within the scope of the claims of this invention should still fall within the patent coverage of this invention.

Claims

1. An independent three-function composite exhaust valve, characterized in that, include: Valve tube (2), the inner cavity of the valve tube (2) is provided with air guide valve (9) and valve core (10), the valve tube (2) is fixedly connected to the mounting bracket (1), the air guide valve (9) is fixedly connected to the inner wall of the valve tube (2), the valve core (10) is sleeved with a pressure holding spring (11), the valve core (10) is slidably connected to the inner wall of the valve tube (2), the upper and lower ends of the valve core (10) and the inner wall of the valve tube (2) form an exhaust groove (19), the two ends of the pressure holding spring (11) are fixedly connected to the air guide valve (9) and the valve core (10) respectively; The buffer valve (8) is fixedly connected to the side of the mounting bracket (1). The buffer valve (8) has a buffer groove (20) that communicates with the exhaust groove (19) inside. The side of the buffer valve (8) is fixedly connected to an exhaust pipe (7) that communicates with the inner cavity of the buffer groove (20). The inner wall of the exhaust pipe (7) is threaded with a bolt (32). A venting main pipe (5) is provided, which penetrates the interior of the buffer valve (8). A venting groove (16) is provided inside the venting main pipe (5) along the axis. A guide pipe (3) is installed at both ends of the venting main pipe (5) through a connecting sleeve (4). A venting port (17) is provided inside the buffer valve (8). The two ends of the venting port (17) are connected to the venting groove (16) and the exhaust groove (19) respectively. The bolt (32) has an air outlet groove (34) inside along the center line, and a number of air outlet holes (33) are equally spaced at the top of the bolt (32). The air outlet groove (34) is connected to the inner cavity of the buffer groove (20), and the bolt (32) is in contact with the inner wall of the exhaust pipe (7). The bolt (32) is fixedly connected to a nut (6) by a sealing gasket (31) on its side end, and the sealing gasket (31) is abutted against the side end of the exhaust pipe (7).

2. The independent three-function composite exhaust valve according to claim 1, characterized in that, The valve core (10) has a receiving groove (28) at one end near the buffer valve (8). The valve core (10) has several air guide holes (12) along the axis inside. The valve core (10) has a collecting hole (14) along the axis at one end near the air guide valve (9). The two ends of the several air guide holes (12) are respectively connected to the inner cavity of the collecting hole (14) and the inner cavity of the receiving groove (28). The air guide valve (9) has a connecting hole (15) along the axis. The inner cavity of the connecting hole (15) is connected to the inner cavity of the collecting hole (14).

3. The independent three-function composite exhaust valve according to claim 2, characterized in that, The buffer valve (8) has an annular buffer pad (18) fixedly connected to one end near the valve core (10). The buffer pad (18) is plastic and abuts against the inner wall of the receiving groove (28).

4. The independent three-function composite exhaust valve according to claim 1, characterized in that, The air valve (9) has two sets of guide plates (30) fixedly connected at one end near the valve core (10). The curvature of the two sets of guide plates (30) is equal to that of the valve core (10). Guide grooves (29) are respectively opened on both sides of the valve core (10). The inner wall of the guide groove (29) is slidably connected to the guide plate (30).

5. The independent three-function composite exhaust valve according to claim 1, characterized in that, The air guide tube (3) is rotatably connected to the inner wall of the connecting sleeve (4). A flow guide seat (22) is fixedly connected to the inner wall of the air guide tube (3). The side end of the air guide tube (3) is abutted against the connecting sleeve (4) through a sealing ring (23). An obstruction seat (21) is fixedly connected to the inner wall of the air passage (16). The cross-section of the obstruction seat (21) and the flow guide seat (22) is triangular. The obstruction seat (21) and the flow guide seat (22) fit together.

6. The independent three-function composite exhaust valve according to claim 5, characterized in that, The connecting sleeve (4) has a rotating groove (24) along the axis, and the top end of the air guide pipe (3) is fixedly connected to a rotating plate (26).

7. The independent three-function composite exhaust valve according to claim 6, characterized in that, The rotating plate (26) is fixedly connected to a pointer (25) on its side end, and the connecting sleeve (4) is marked with scale values ​​at equal intervals on its surface.

8. The independent three-function composite exhaust valve according to claim 6, characterized in that, The upper and lower ends of the connecting sleeve (4) are respectively fixedly connected to the limiting plate (27), and the limiting plate (27) is located at the end of the rotating groove (24).

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