Exhaust check valve with noise reduction function

Abstract

The present invention relates to the technical field of check valves. Disclosed is an exhaust check valve with noise reduction function, comprising a valve body mechanism, a noise reduction mechanism, a flow control mechanism, a sealing and temperature control mechanism and a self-cleaning mechanism, wherein the noise reduction mechanism is securely connected to the valve body mechanism, the flow control mechanism is securely connected to the valve body mechanism, the sealing and temperature control mechanism is securely connected to the valve body mechanism, and the self-cleaning mechanism is securely connected to the valve body mechanism; the noise reduction mechanism, the flow control mechanism and the self-cleaning mechanism are all located inside the valve body mechanism, and the sealing and temperature control mechanism is located outside the valve body mechanism. The helical noise reduction assembly guides airflow to rotate, thereby reducing the flow velocity and noise. The flow control mechanism achieves precise flow control. The sealing and temperature control mechanism located outside the valve body mechanism uses a compensation spring and a dynamic sealing ring to ensure valve sealing performance under different temperatures. The self-cleaning mechanism periodically cleans the interior of a valve body, with contaminants being discharged through a cleaning tube.

Description

An exhaust check valve with noise reduction function Technical Field

[0001] This invention relates to the field of check valve technology, specifically an exhaust check valve with noise reduction function.

[0002] With the acceleration of industrialization, the application of machinery and equipment in various industries is becoming increasingly widespread. Exhaust systems, as a crucial component, directly impact equipment efficiency and environmental quality. Traditional exhaust check valves play a vital role in preventing backflow, but they still have shortcomings in noise control, flow regulation, sealing performance, and ease of maintenance. In recent years, to meet the demands of environmental protection and efficient production, the market demand for exhaust check valves with noise reduction capabilities, precise flow control, reliable sealing, and automatic cleaning has been growing. This has spurred continuous innovation and development in related technologies, and multifunctional, high-performance exhaust check valves will have broad application prospects in the industrial field in the future.

[0003] Currently, most exhaust check valves on the market are single-function, typically offering only basic check and simple flow control. Some improved valves incorporate simple sound-absorbing cotton or plates within the valve body to reduce exhaust noise, but the effect is limited. Furthermore, traditional valve flow control mechanisms usually rely on manual adjustment, making high-precision automatic control difficult. In terms of sealing performance, most employ fixed sealing structures, which cannot adapt to changes in temperature and pressure, leading to decreased sealing performance. Cleaning and maintenance of these valves typically require shutdown and disassembly, which is time-consuming and impacts production efficiency. These existing technologies have limitations in terms of functional integration, automation, and ease of maintenance.

[0004] Existing exhaust check valves are not ideal in terms of noise reduction, failing to effectively reduce high-frequency and specific-frequency noise, thus affecting the working environment and personnel health. Regarding flow control, they lack precise automated adjustment mechanisms, failing to meet the demands of modern industry for accurate flow control. Sealing performance is limited by the fixed structure, unable to adapt to temperature changes, leading to increased leakage risk and impacting system safety and reliability. Furthermore, traditional valves lack automatic cleaning functions; dirt accumulation can easily cause valve jamming or failure, requiring frequent downtime for maintenance and reducing production efficiency. Therefore, those skilled in the art provide an exhaust check valve with integrated noise reduction functionality. Summary of the Invention

[0005] The purpose of this invention is to provide an exhaust check valve with noise reduction function to solve the problems mentioned in the prior art.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] The exhaust check valve includes a valve body mechanism, a noise reduction mechanism, a flow control mechanism, a sealing temperature control mechanism, and a self-cleaning mechanism. The noise reduction mechanism is fastened to the valve body mechanism, the flow control mechanism is fastened to the valve body mechanism, the sealing temperature control mechanism is fastened to the valve body mechanism, and the self-cleaning mechanism is fastened to the valve body mechanism. The noise reduction mechanism, the flow control mechanism, and the self-cleaning mechanism are all located inside the valve body mechanism, while the sealing temperature control mechanism is located outside the valve body mechanism.

[0008] By adopting the above technical solution, the valve body mechanism consists of a valve body, an inlet flange, an outlet flange, a noise reduction body, a resonant elastic element, a mass block, an adjusting elastic element, an electromagnetic block, and a cleaning chamber. The valve body is connected to the inlet flange and the outlet flange, and gas enters the valve body from the inlet flange. The noise reduction body is connected to the interior of the valve body and contains a resonant elastic element and a mass block. The mass block is slidably connected to the noise reduction body through the electromagnetic block. The adjusting elastic element is connected between the electromagnetic block and the mass block to adjust the resonant frequency, thereby absorbing and reducing specific noise. The noise reduction mechanism includes a spiral noise reduction component and a porous sound absorption component. The spiral noise reduction component consists of a spiral block, a spiral valve disc, a valve stem, and a rod elastic element. The spiral block has spiral channels with gradually increasing diameters to guide airflow rotation and reduce flow velocity and noise. The flow control mechanism includes a flow sensor, an adjustable orifice plate, a guide rod, a transmission gear, a ball gear, and a ball-tooth motor. The flow sensor monitors the gas flow rate, and the ball-tooth motor drives the guide rod through the transmission gear and the ball gear to adjust the position of the adjustable orifice plate, achieving precise flow control. The sealing and temperature control mechanism is located outside the valve body and includes a temperature sensor, compensating spring, dynamic sealing ring, guide sleeve, cooling box, heating box, outer casing pipe, and liquid pump. The temperature sensor detects the valve temperature, the liquid pump circulates cooling or heating medium, the outer casing pipe regulates the valve body temperature, and the compensating spring and dynamic sealing ring ensure the valve's sealing performance at different temperatures. A self-cleaning mechanism periodically cleans the inside of the valve body, and the cleaning pipe discharges contaminants. Through the coordinated operation of these components, the valve achieves effective noise reduction, precise flow control, reliable sealing and temperature regulation, and automatic cleaning, ensuring efficient and stable operation.

[0009] Furthermore, the valve body mechanism includes a valve body, an inlet flange, an outlet flange, a noise reduction body, a resonant elastic element, a mass block, an adjusting elastic element, an electromagnetic block, and a cleaning chamber. The valve body is connected to the inlet flange, the outlet flange is connected to the valve body, the noise reduction body is connected to the valve body, the cleaning chamber is connected to the valve body, the mass block and the electromagnetic block are electrically connected, the mass block and the noise reduction body are slidably connected, the electromagnetic block and the noise reduction body are fastened together, the adjusting elastic element and the electromagnetic block are fastened together, and the adjusting elastic element and the mass block are fastened together.

[0010] By adopting the above technical solution, the valve body is connected to the inlet flange and outlet flange, forming the main channel for gas flow. A noise-reducing element is installed inside the valve body and communicates with it, containing a resonant elastic element and a mass block. The mass block is slidably connected to the noise-reducing element and electrically connected to it via an electromagnetic block, which is fixedly mounted on the noise-reducing element. One end of the adjusting elastic element is fixedly connected to the electromagnetic block, and the other end is fixedly connected to the mass block, forming a mass-spring system capable of adjusting the system's resonant frequency. The electromagnetic force generated by the electromagnetic block adjusts the position and vibration characteristics of the mass block, enabling the resonant system to absorb noise of specific frequencies, achieving a noise reduction effect. The cleaning chamber is connected to the valve body, facilitating the cleaning and maintenance of internal components and ensuring the normal operation of the valve. This design utilizes the principle of resonance, using a resonant system composed of a mass block, a resonant elastic element, and an adjusting elastic element to absorb and attenuate noise of specific frequencies. Simultaneously, the electromagnetic block allows the system to dynamically adjust the resonant frequency to adapt to noise characteristics under different operating conditions. The overall structure is compact, with reasonable connections between components, effectively reducing noise and improving the valve's working efficiency and service life.

[0011] Furthermore, the noise reduction mechanism includes a spiral noise reduction component, a porous sound absorption component, a first restoring elastic element, a first return valve, a second restoring elastic element, and a second return valve. The spiral noise reduction component is fastened to the air inlet flange and the air outlet flange. The porous sound absorption component is fastened to the valve body. The first restoring elastic element is fastened to the valve body and the first return valve. The first return valve is hinged to the valve body. The second return valve is slidably connected to the valve body. The second return valve and the second restoring elastic element are fastened together. The second restoring elastic element is fastened to the valve body. The second restoring elastic element has a rotating protrusion with a crescent-shaped cross-section.

[0012] By adopting the above technical solution, the spiral noise reduction component is firmly connected to the inlet flange and outlet flange respectively, forming a spiral channel for gas flow, which promotes airflow rotation and reduces flow velocity and noise. The porous sound-absorbing component is fixed inside the valve body and filled with sound-absorbing material, using its porous structure to absorb residual noise. One end of the first restoring elastic element is firmly connected to the valve body, and the other end is firmly connected to the first restoring valve. The first restoring valve is hinged to the valve body and can open or close under the action of the elastic element, controlling the airflow and further reducing noise. The second restoring valve is slidably connected to the valve body and fixedly connected to the second restoring elastic element. The second restoring elastic element is also firmly connected to the valve body and has a rotating protrusion with a crescent-shaped cross-section. This design allows the rotating protrusion to rotate smoothly, adjusting the position of the second restoring valve to adapt to changes in airflow, enhancing sealing performance and noise reduction effect. Through the synergistic effect of the above components, the gas is effectively noise-reduced when passing through the valve, while ensuring the valve's sensitivity and sealing performance, improving the overall performance of the exhaust check valve.

[0013] Furthermore, the helical noise reduction assembly includes a helical block, a helical valve disc, a valve stem, and a rod elastic element. The helical block is fastened to the air inlet flange. The helical block has a helical channel with a gradually increasing diameter. The valve stem and the helical block are hinged. The helical valve disc and the valve stem are slidably connected. The rod elastic element and the helical valve disc are fastened together. The valve stem and the rod elastic element are fastened together.

[0014] By adopting the above technical solution, the spiral block is firmly connected to the inlet flange, and it is provided with spiral channels with gradually increasing diameters. When gas enters from the inlet, it passes through the spiral channels of the spiral block and is guided into a spiral flow. As the diameter increases, the airflow velocity gradually decreases, the pressure is relieved, and noise reduction is achieved. The valve stem is hinged to the spiral block, allowing the valve stem to rotate within a certain angle range. The spiral valve disc is slidably connected to the valve stem, allowing it to move freely along the valve stem direction. One end of the rod elastic element is firmly connected to the spiral valve disc, and the other end is firmly connected to the valve stem, providing elastic restoring force. When the airflow changes, the rod elastic element causes the spiral valve disc to adjust its position in time, ensuring smooth airflow and stable noise reduction effect. Through the synergistic effect of the above components, the gas forms a smooth spiral flow within the spiral channels, reducing turbulence and noise, achieving efficient noise reduction, and improving the performance and reliability of the valve.

[0015] Furthermore, the porous sound-absorbing component includes a porous sound-absorbing plate, a sound-absorbing material filler, and an iris component. The porous sound-absorbing plate and the iris component are fastened together, the sound-absorbing material filler and the porous sound-absorbing plate are fastened together, and the porous sound-absorbing plate and the valve body are fastened together.

[0016] By adopting the above technical solution, a porous sound-absorbing plate is fixedly connected inside the valve body and securely connected to the iris assembly, forming a structure for regulating airflow. The sound-absorbing material filler is tightly packed into the pores of the porous sound-absorbing plate, enhancing the sound absorption effect. During operation, gas passes through the iris assembly, which controls the airflow speed and flow rate by adjusting the pore size. Subsequently, the airflow enters the porous sound-absorbing plate, where sound waves are reflected and attenuated multiple times within the pores, and the sound-absorbing material filler further absorbs sound energy, reducing noise. This design utilizes the combination of a porous structure and sound-absorbing material, along with the precise control of airflow by the iris assembly, to achieve highly efficient noise reduction while ensuring the valve's flow regulation function.

[0017] Furthermore, the flow control mechanism includes a flow sensor, an adjustable orifice plate, a guide rod, a transmission gear, a ball gear, and a ball-tooth motor. The flow sensor is fastened to the inlet flange, the flow sensor is fastened to the outlet flange, the adjustable orifice plate is fastened to the inlet flange, the ball-tooth motor is fastened to the inlet flange, and there are two ball-tooth motors and transmission gears. The ball-tooth motor and the transmission gears are connected in a driving connection. The two transmission gears are arranged vertically, and the transmission gears are connected in a driving connection with the ball gears. The ball gears are connected in a driving connection with the guide rod.

[0018] By adopting the above technical solution, the flow sensor is securely connected to both the inlet flange and the outlet flange, respectively, to monitor the gas flow rate entering and exiting the valves in real time. The adjustable orifice plate is securely connected to the inlet flange, allowing for adjustment of the gas flow rate by changing the orifice diameter. Two ball-tooth motors and two drive gears are also securely connected to the inlet flange. Each ball-tooth motor is connected to a drive gear, and these two drive gears are vertically arranged for more efficient spatial layout. The drive gears are in turn connected to ball gears, which are further connected to a guide rod. When the flow sensor detects that the gas flow rate needs adjustment, it transmits a signal to the ball-tooth motors. After the ball-tooth motors start, they transmit power to the ball gears via the drive gears. The ball gears change the direction of power transmission, transmitting rotational motion to the guide rod. The guide rod, through rotation or linear motion, drives the adjustable orifice plate to change its position, adjusting the orifice diameter and precisely controlling the gas flow rate. The vertical arrangement of the two drive gears ensures smoother power transmission and reduces mechanical losses. This design utilizes the precise coordination of a ball-tooth motor, transmission gears, ball gears, and guide rods to achieve high-precision control of the adjustable orifice plate, thereby accurately regulating the valve's flow rate. This mechanism offers rapid response and high control accuracy, ensuring the valve maintains optimal flow under various operating conditions, thus improving system efficiency and reliability.

[0019] Furthermore, the sealing temperature control mechanism includes a temperature sensor, a compensating spring, a dynamic sealing ring, a guide sleeve, a cooling box, a heating box, an outer casing pipe, and a liquid pump. The temperature sensor is fastened to the valve body, the compensating spring is fastened to the dynamic sealing ring, the guide sleeve is fastened to the air inlet flange, the outer casing pipe is located outside the valve body, the outer casing pipe is connected to the cooling box, the outer casing pipe is connected to the liquid pump, and the heating box is connected to the liquid pump.

[0020] By adopting the above technical solution, the temperature sensor is firmly connected to the valve body to monitor the valve's temperature changes in real time; the compensating elastic element is firmly connected to the dynamic sealing ring to provide elastic pressure, ensuring that the dynamic sealing ring maintains a good seal with the valve body at different temperatures; the guide sleeve is firmly connected to the inlet flange to guide the axial movement of the dynamic sealing ring; the outer sleeve is located outside the valve body and is connected to the cooling tank and liquid pump, through which the liquid pump circulates the cooling medium to reduce the valve body temperature; simultaneously, the outer sleeve is also connected to the heating tank and liquid pump, when heating is required, the liquid pump delivers the heating medium to the outer sleeve to increase the valve body temperature. When the temperature sensor detects that the valve body temperature deviates from the set range, the control system starts the liquid pump to circulate the cooling or heating medium through the outer sleeve, restoring the valve body temperature to the normal range; the compensating spring and the dynamic sealing ring work together to ensure that the valve's sealing performance is not affected during temperature changes. Through this design, automatic temperature control and reliable sealing of the valve under different temperature conditions are achieved, ensuring the stable operation and service life of the valve.

[0021] Furthermore, the self-cleaning mechanism includes a cleaning brush, a lifting hydraulic cylinder, a cleaning motor, a cleaning block, and a cleaning pipe. The cleaning motor and the cleaning block are fastened together, the cleaning motor and the cleaning brush are driven together, the lifting hydraulic cylinder and the valve body are fastened together, the lifting hydraulic cylinder and the cleaning block are driven together, and the cleaning pipe and the valve body are connected.

[0022] By adopting the above technical solution, the cleaning motor is securely connected to the cleaning block, driving its movement. The cleaning motor, through a transmission connection, drives the cleaning brush to rotate, cleaning the interior of the valve body. A lifting hydraulic cylinder is securely connected to the valve body, controlling the lifting position of the cleaning block via a transmission connection, allowing the cleaning brush to reach different cleaning areas. A cleaning pipe is connected to the valve body to remove contaminants generated during the cleaning process. When cleaning is required, the lifting hydraulic cylinder adjusts the position of the cleaning block, the cleaning motor starts, and the cleaning brush rotates to clean the inner wall of the valve body; contaminants generated during cleaning are discharged through the cleaning pipe. Through the coordinated action of these components, the valve's automatic cleaning function is achieved, ensuring normal valve operation and extending its service life.

[0023] Compared with the prior art, the beneficial effects of the present invention are:

[0024] Noise Reduction: Effective noise reduction is achieved through the coordinated action of various components within the noise reduction mechanism. The spiral block in the spiral noise reduction assembly is securely connected to the inlet flange and features spiral channels with gradually increasing diameters. After entering the spiral channels, the gas is guided into a spiral flow; as the diameter increases, the airflow velocity gradually decreases, relieving pressure and achieving noise reduction. The spiral valve disc is hinged to the spiral block via a valve stem, and an elastic element connects the valve stem and the spiral valve disc, providing elastic restoring force to ensure the valve disc adjusts its position promptly according to airflow changes, maintaining stable noise reduction performance.

[0025] Flow control improves system efficiency: The flow control mechanism achieves precise control of gas flow through the precise coordination of its components. Flow sensors are securely connected to both the inlet and outlet flanges to monitor gas flow in real time. The adjustable orifice plate is securely connected to the inlet flange, its position controlled by a guide rod. Two ball-tooth motors and two drive gears are vertically positioned to optimize space, and the ball-tooth motors drive the drive gears, which in turn drive the ball gears. Ultimately, through the transmission connection between the ball gears and the guide rod, the position and orifice diameter of the adjustable orifice plate are precisely adjusted, achieving precise control of the gas flow and improving system efficiency and reliability.

[0026] Reliable Sealing and Temperature Control: The sealing and temperature control mechanism ensures the valve's sealing performance and stability through temperature sensing and automatic adjustment. A temperature sensor is securely connected to the valve body, monitoring the valve body temperature in real time. A compensating spring is securely connected to the dynamic sealing ring, providing elastic pressure to ensure the sealing ring remains tightly fitted to the valve body even with temperature changes. A guide sleeve is securely connected to the inlet flange, guiding the movement of the dynamic sealing ring. An outer casing pipe is located outside the valve body, connecting to the cooling box, heating box, and liquid pump. When the temperature deviates from the set range, the liquid pump starts, circulating the cooling or heating medium and adjusting the valve body temperature through the outer casing pipe, ensuring reliable valve operation under different temperature conditions.

[0027] Automatic cleaning function extends equipment life: The self-cleaning mechanism enables automatic valve cleaning, ensuring long-term stable operation. A cleaning motor is securely connected to the cleaning block, driving its movement and, through a transmission connection, rotating the cleaning brush. A lifting hydraulic cylinder is securely connected to the valve body, controlling the lifting position of the cleaning block so the cleaning brush can clean different areas. A cleaning pipe connects to the valve body to remove contaminants generated during cleaning. When cleaning is needed, the lifting hydraulic cylinder adjusts the cleaning block's position, the cleaning motor starts, and the cleaning brush cleans the inside of the valve body; contaminants are discharged through the cleaning pipe. This design effectively prevents contaminant accumulation, reduces the need for manual maintenance, and extends the valve's service life. Attached Figure Description

[0028] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0029] Figure 2 is a schematic diagram of the valve body mechanism of the present invention;

[0030] Figure 3 is a schematic diagram of the resonant elastic element structure of the present invention;

[0031] Figure 4 is a schematic diagram of the spiral noise reduction component of the present invention;

[0032] Figure 5 is a schematic diagram of the second recovery valve structure of the present invention;

[0033] Figure 6 is a schematic diagram of the porous sound-absorbing component structure of the present invention;

[0034] Figure 7 is a schematic diagram of the flow control mechanism of the present invention;

[0035] Figure 8 is a schematic diagram of the self-cleaning mechanism of the present invention.

[0036] In the diagram: 1. Valve body mechanism; 11. Valve body; 12. Inlet flange; 13. Outlet flange; 14. Noise reduction body; 15. Resonant elastic element; 16. Mass block; 17. Adjusting elastic element; 18. Electromagnetic block; 19. Clean chamber; 2. Noise reduction mechanism; 21. Spiral noise reduction assembly; 211. Spiral block; 2111. Spiral channel; 212. Spiral valve disc; 213. Valve stem; 214. Stem elastic element; 22. Porous sound absorption assembly; 221. Porous sound absorption panel; 222. Sound absorption material filler; 223. Iris assembly; 23. First restoring elastic element; 24. First return valve; 25. Second restoring elastic element; 26. Second return valve; 261. Rotating protrusion; 3. Flow control mechanism; 31. Flow sensor; 32. Adjustable orifice plate; 33. Guide rod; 34. Transmission gear; 35. Ball gear; 36. Ball gear motor; 4. Sealing temperature control mechanism; 41. Temperature sensor; 42. Compensating spring; 43. Active sealing ring; 44. Guide sleeve; 45. Cooling box; 46. Heating box; 47. Outer pipe; 48. Liquid pump; 5. Self-cleaning mechanism; 51. Cleaning brush; 52. Lifting hydraulic cylinder; 53. Cleaning motor; 54. Cleaning block; 55. Cleaning pipe. Detailed Implementation

[0037] 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.

[0038] Please refer to Figures 1-8. This invention provides a technical solution for an exhaust check valve with noise reduction function:

[0039] The exhaust check valve includes a valve body mechanism 1, a noise reduction mechanism 2, a flow control mechanism 3, a sealing temperature control mechanism 4, and a self-cleaning mechanism 5. The noise reduction mechanism 2 is fastened to the valve body mechanism 1, the flow control mechanism 3 is fastened to the valve body mechanism 1, the sealing temperature control mechanism 4 is fastened to the valve body mechanism 1, and the self-cleaning mechanism 5 is fastened to the valve body mechanism 1. The noise reduction mechanism 2, the flow control mechanism 3, and the self-cleaning mechanism 5 are all located inside the valve body mechanism 1, while the sealing temperature control mechanism 4 is located outside the valve body mechanism 1.

[0040] By adopting the above technical solution, the valve body mechanism 1 consists of a valve body 11, an inlet flange 12, an outlet flange 13, a noise reduction body 14, a resonant elastic element 15, a mass block 16, an adjusting elastic element 17, an electromagnetic block 18, and a cleaning chamber 19. The valve body 11 is connected to the inlet flange 12 and the outlet flange 13, and gas enters the valve body 11 from the inlet flange 12. The noise reduction body 14 is connected to the interior of the valve body 11, and has a resonant elastic element 15 and a mass block 16 inside. The mass block 16 is slidably connected to the noise reduction body 14 through the electromagnetic block 18. The adjusting elastic element 17 is connected between the electromagnetic block 18 and the mass block 16 to adjust the resonant frequency, thereby absorbing and reducing specific noise. The noise reduction mechanism 2 includes a spiral noise reduction component 21 and a porous sound absorption component 22. The spiral noise reduction component 21 consists of a spiral block 211, a spiral valve disc 212, a valve stem 213, and a rod elastic element 214. The spiral block 211 has spiral channels 2111 with gradually increasing apertures to guide airflow rotation and reduce flow velocity and noise. The flow control mechanism 3 includes a flow sensor 31, an adjustable orifice plate 32, a guide rod 33, a transmission gear 34, a ball gear 35, and a ball gear motor 36. The flow sensor 31 monitors the gas flow rate. The ball gear motor 36 drives the guide rod 33 through the transmission gear 34 and the ball gear 35 to adjust the position of the adjustable orifice plate 32, thereby achieving precise flow control. The sealing and temperature control mechanism 4 is located outside the valve body mechanism 1 and includes a temperature sensor 41, a compensating spring 42, a dynamic sealing ring 43, a guide sleeve 44, a cooling box 45, a heating box 46, an outer casing pipe 47, and a liquid pump 48. The temperature sensor 41 detects the valve temperature, the liquid pump 48 circulates cooling or heating media, the outer casing pipe 47 regulates the valve body temperature, and the compensating spring 42 and dynamic sealing ring 43 ensure the valve's sealing performance at different temperatures. The self-cleaning mechanism 5 periodically cleans the inside of the valve body, and the cleaning pipe 55 discharges contaminants. Through the cooperation of these components, the valve achieves effective noise reduction, precise flow control, reliable sealing and temperature regulation, as well as an automatic cleaning function, ensuring the valve's efficient and stable operation.

[0041] Furthermore, the valve body mechanism 1 includes a valve body 11, an inlet flange 12, an outlet flange 13, a noise reduction body 14, a resonant elastic element 15, a mass block 16, an adjusting elastic element 17, an electromagnetic block 18, and a cleaning chamber 19. The valve body 11 is connected to the inlet flange 12, the outlet flange 13 is connected to the valve body 11, the noise reduction body 14 is connected to the valve body 11, the cleaning chamber 19 is connected to the valve body 11, the mass block 16 and the electromagnetic block 18 are electrically connected, the mass block 16 and the noise reduction body 14 are slidably connected, the electromagnetic block 18 and the noise reduction body 14 are fastened together, the adjusting elastic element 17 and the electromagnetic block 18 are fastened together, and the adjusting elastic element 17 and the mass block 16 are fastened together.

[0042] By adopting the above technical solution, the valve body 11 is connected to the inlet flange 12 and the outlet flange 13, forming the main channel for gas flow. A noise reduction body 14 is installed inside and connected to the valve body 11, and contains a resonant elastic element 15 and a mass block 16. The mass block 16 is slidably connected to the noise reduction body 14 and electrically connected to it via an electromagnetic block 18, which is fixedly installed on the noise reduction body 14. One end of the adjusting elastic element 17 is fixedly connected to the electromagnetic block 18, and the other end is fixedly connected to the mass block 16, forming a mass-spring system capable of adjusting the system's resonant frequency. The electromagnetic force generated by the electromagnetic block 18 adjusts the position and vibration characteristics of the mass block 16, enabling the resonant system to absorb noise of a specific frequency, achieving a noise reduction effect. The cleaning chamber 19 is connected to the valve body 11, facilitating the cleaning and maintenance of internal components and ensuring the normal operation of the valve. This design utilizes the principle of resonance, using the resonant system composed of the mass block 16, the resonant elastic element 15, and the adjusting elastic element 17 to absorb and attenuate noise of a specific frequency. Meanwhile, the electromagnetic block 18 enables the system to dynamically adjust the resonant frequency, adapting to noise characteristics under different operating conditions. The overall structure is compact, with reasonable connections between components, effectively reducing noise and improving valve efficiency and service life.

[0043] Furthermore, the noise reduction mechanism 2 includes a spiral noise reduction component 21, a porous sound absorption component 22, a first restoring elastic element 23, a first return valve 24, a second restoring elastic element 25, and a second return valve 26. The spiral noise reduction component 21 is fastened to the air inlet flange 12 and the air outlet flange 13. The porous sound absorption component 22 is fastened to the valve body 11. The first restoring elastic element 23 is fastened to the valve body 11 and the first return valve 24. The first return valve 24 is hinged to the valve body 11. The second return valve 26 is slidably connected to the valve body 11. The second return valve 26 is fastened to the second restoring elastic element 25 and the second restoring elastic element 25 is fastened to the valve body 11. The second restoring elastic element 25 is provided with a rotating protrusion 261, and the cross-section of the rotating protrusion 261 is crescent-shaped.

[0044] By adopting the above technical solution, the spiral noise reduction component 21 is securely connected to the inlet flange 12 and the outlet flange 13 respectively, forming a spiral channel for gas flow, which promotes airflow rotation and reduces flow velocity and noise. The porous sound-absorbing component 22 is fixed inside the valve body 11 and filled with sound-absorbing material, using its porous structure to absorb residual noise. One end of the first restoring elastic member 23 is securely connected to the valve body 11, and the other end is securely connected to the first return valve 24. The first return valve 24 is hinged to the valve body 11 and can be opened or closed under the action of the elastic member to control airflow and further reduce noise. The second return valve 26 is slidably connected to the valve body 11 and fixedly connected to the second restoring elastic member 25. The second restoring elastic member 25 is also securely connected to the valve body 11 and has a rotating protrusion 261 with a crescent-shaped cross-section. This design allows the rotating protrusion 261 to rotate smoothly, adjusting the position of the second return valve 26 to adapt to airflow changes and enhance sealing performance and noise reduction effect. Through the synergistic effect of the above components, the gas is effectively noise-reduced as it passes through the valve, while ensuring the valve's sensitivity and sealing performance, thus improving the overall performance of the exhaust check valve.

[0045] Furthermore, the spiral noise reduction assembly 21 includes a spiral block 211, a spiral valve disc 212, a valve stem 213, and a rod elastic element 214. The spiral block 211 is fastened to the air inlet flange 12. The spiral block 211 is provided with a spiral channel 2111, the diameter of which gradually increases. The valve stem 213 is hinged to the spiral block 211, the spiral valve disc 212 is slidably connected to the valve stem 213, the rod elastic element 214 is fastened to the spiral valve disc 212, and the valve stem 213 is fastened to the rod elastic element 214.

[0046] By adopting the above technical solution, the spiral block 211 is securely connected to the inlet flange 12, and has a spiral channel 2111 on it, the diameter of which gradually increases. When gas enters from the inlet, it passes through the spiral channel 2111 of the spiral block 211, and the gas is guided into a spiral flow. As the diameter increases, the airflow velocity gradually decreases, the pressure is relieved, and the noise reduction effect is achieved. The valve stem 213 is hinged to the spiral block 211, allowing the valve stem 213 to rotate within a certain angle range. The spiral valve disc 212 is slidably connected to the valve stem 213, and can move freely along the direction of the valve stem 213. One end of the rod elastic element 214 is securely connected to the spiral valve disc 212, and the other end is securely connected to the valve stem 213, providing elastic restoring force. When the airflow changes, the rod elastic element 214 causes the spiral valve disc 212 to adjust its position in time, ensuring smooth airflow and stable noise reduction effect. Through the synergistic effect of the above components, the gas forms a smooth spiral flow within the spiral channel 2111, reducing turbulence and noise, achieving efficient noise reduction, and improving the performance and reliability of the valve.

[0047] Furthermore, the porous sound-absorbing component 22 includes a porous sound-absorbing plate 221, a sound-absorbing material filler 222, and an iris component 223. The porous sound-absorbing plate 221 and the iris component 223 are fastened together, the sound-absorbing material filler 222 and the porous sound-absorbing plate 221 are fastened together, and the porous sound-absorbing plate 221 and the valve body 11 are fastened together.

[0048] By adopting the above technical solution, the porous sound-absorbing plate 221 is fixedly connected inside the valve body 11 and tightly connected to the iris assembly 223, forming a structure for regulating airflow. The sound-absorbing material filler 222 is tightly filled into the pores of the porous sound-absorbing plate 221, enhancing the sound absorption effect. During operation, gas passes through the iris assembly 223, which controls the speed and flow rate of the airflow by adjusting the pore size. Subsequently, the airflow enters the porous sound-absorbing plate 221, where sound waves are reflected and attenuated multiple times within the pores. The sound-absorbing material filler 222 further absorbs sound energy, reducing noise. This design utilizes the combination of a porous structure and sound-absorbing material, along with the precise control of airflow by the iris assembly 223, to achieve efficient noise reduction while ensuring the valve's flow regulation function.

[0049] Furthermore, the flow control mechanism 3 includes a flow sensor 31, an adjustable orifice plate 32, a guide rod 33, a transmission gear 34, a ball gear 35, and a ball-tooth motor 36. The flow sensor 31 is fastened to the inlet flange 12 and the outlet flange 13. The adjustable orifice plate 32 is fastened to the inlet flange 12. The ball-tooth motor 36 is fastened to the inlet flange 12. There are two ball-tooth motors 36 and two transmission gears 34. The ball-tooth motor 36 and the transmission gear 34 are connected in a driving connection. The two transmission gears 34 are arranged vertically. The transmission gear 34 and the ball gear 35 are connected in a driving connection. The ball gear 35 and the guide rod 33 are connected in a driving connection.

[0050] By adopting the above technical solution, the flow sensor 31 is securely connected to the inlet flange 12 and the outlet flange 13 respectively, monitoring the gas flow rate entering and exiting the valves in real time. The adjustable orifice plate 32 is securely connected to the inlet flange 12, allowing adjustment of the gas flow rate by changing the orifice size. The ball gear motor 36 is also securely connected to the inlet flange 12, and includes two ball gear motors 36 and two drive gears 34. Each ball gear motor 36 is driven by one drive gear 34, and these two drive gears 34 are vertically arranged for more efficient spatial layout. The drive gear 34 is further driven by a ball gear 35, which is in turn driven by a guide rod 33. When the flow sensor 31 detects that the gas flow rate needs adjustment, it transmits a signal to the ball gear motor 36. After the ball gear motor 36 starts, it transmits power to the ball gear 35 through the drive gear 34. The ball gear 35 changes the direction of power transmission, transmitting the rotational motion to the guide rod 33. The guide rod 33, through rotation or linear motion, drives the adjustable orifice plate 32 to change its position, adjusting the orifice diameter and precisely controlling the gas flow rate. The vertical arrangement of the two transmission gears 34 ensures smoother power transmission and reduces mechanical losses. This design, utilizing the precise coordination of the ball gear motor 36, transmission gears 34, ball gears 35, and guide rod 33, achieves high-precision control of the adjustable orifice plate 32, thereby precisely regulating the valve's flow rate. This mechanism offers rapid response and high control accuracy, ensuring the valve maintains optimal flow under various operating conditions, thus improving system efficiency and reliability.

[0051] Furthermore, the sealing temperature control mechanism 4 includes a temperature sensor 41, a compensating spring 42, a dynamic sealing ring 43, a guide sleeve 44, a cooling box 45, a heating box 46, an outer casing pipe 47, and a liquid pump 48. The temperature sensor 41 is fastened to the valve body 11, the compensating spring 42 is fastened to the dynamic sealing ring 43, the guide sleeve 44 is fastened to the air inlet flange 12, the outer casing pipe 47 is located outside the valve body 11, the outer casing pipe 47 is connected to the cooling box 45, the outer casing pipe 47 is connected to the liquid pump 48, and the heating box 46 is connected to the liquid pump 48.

[0052] By adopting the above technical solution, the temperature sensor 41 is tightly connected to the valve body 11 to monitor the valve's temperature changes in real time; the compensating elastic element is tightly connected to the dynamic sealing ring 43 to provide elastic pressure, ensuring that the dynamic sealing ring 43 maintains a good seal with the valve body at different temperatures; the guide sleeve 44 is tightly connected to the inlet flange 12 to guide the axial movement of the dynamic sealing ring 43; the outer sleeve pipe 47 is located outside the valve body 11 and is connected to the cooling box 45 and the liquid pump 48, through which the cooling medium is circulated to reduce the valve body temperature; at the same time, the outer sleeve pipe 47 is also connected to the heating box 46 and the liquid pump 48, when heating is required, the liquid pump 48 delivers the heating medium to the outer sleeve pipe 47 to increase the valve body temperature. When the temperature sensor 41 detects that the valve body temperature deviates from the set range, the control system starts the liquid pump 48 to circulate the cooling or heating medium through the outer sleeve pipe 47 to restore the valve body temperature to the normal range; the compensating spring 42 and the dynamic sealing ring 43 cooperate to ensure that the valve's sealing performance is not affected during temperature changes. This design enables automatic temperature control and reliable sealing of the valve under different temperature conditions, ensuring stable operation and service life of the valve.

[0053] Furthermore, the self-cleaning mechanism 5 includes a cleaning brush 51, a lifting hydraulic cylinder 52, a cleaning motor 53, a cleaning block 54, and a cleaning pipe 55. The cleaning motor 53 and the cleaning block 54 are fastened together, the cleaning motor 53 and the cleaning brush 51 are driven together, the lifting hydraulic cylinder 52 and the valve body 11 are fastened together, the lifting hydraulic cylinder 52 and the cleaning block 54 are driven together, and the cleaning pipe 55 is connected to the valve body 11.

[0054] By adopting the above technical solution, the cleaning motor 53 is securely connected to the cleaning block 54, driving the movement of the cleaning block 54; the cleaning motor 53 drives the cleaning brush 51 to rotate via a transmission connection, cleaning the inside of the valve body 11. The lifting hydraulic cylinder 52 is securely connected to the valve body 11, controlling the lifting position of the cleaning block 54 via a transmission connection, enabling the cleaning brush 51 to reach different cleaning areas. The cleaning pipe 55 is connected to the valve body 11 and is used to remove dirt generated during the cleaning process. When cleaning is required, the lifting hydraulic cylinder 52 adjusts the position of the cleaning block 54, the cleaning motor 53 starts, driving the cleaning brush 51 to rotate, cleaning the inner wall of the valve body 11; dirt generated during the cleaning process is discharged through the cleaning pipe 55. Through the synergistic action of the above components, the automatic cleaning function of the valve is realized, ensuring the normal operation of the valve and extending its service life.

[0055] The working principle of this invention is as follows: Through the coordinated action of various components within the noise reduction mechanism 2, effective noise reduction is achieved. The spiral block 211 in the spiral noise reduction assembly 21 is securely connected to the inlet flange 12 and has a spiral channel 2111 with gradually increasing aperture. After the gas enters the spiral channel 2111, it is guided into a spiral flow. As the aperture increases, the airflow velocity gradually decreases, and the pressure is relieved, achieving a noise reduction effect. The spiral valve disc 212 is hinged to the spiral block 211 via the valve stem 213. An elastic member 214 connects the valve stem 213 and the spiral valve disc 212, providing elastic restoring force to ensure that the valve disc adjusts its position promptly according to airflow changes, maintaining a stable noise reduction effect. The flow control mechanism 3 achieves precise control of the gas flow rate through the precise cooperation of its components. The flow sensor 31 is securely connected to both the inlet flange 12 and the outlet flange 13, respectively, to monitor the gas flow rate in real time. The adjustable orifice plate 32 is securely connected to the inlet flange 12, and its position is controlled by the guide rod 33. The ball-tooth motor 36 is securely connected to the inlet flange 12. Two ball-tooth motors 36 and two transmission gears 34 are vertically arranged to optimize space. The ball-tooth motors 36 drive the transmission gears 34, which in turn drive the ball gears 35. Finally, through the transmission connection between the ball gears 35 and the guide rod 33, the position and orifice size of the adjustable orifice plate 32 are precisely adjusted, achieving precise control of the gas flow rate and improving system efficiency and reliability. The sealing temperature control mechanism 4 ensures the valve's sealing performance and stability through temperature sensing and active adjustment. The temperature sensor 41 is securely connected to the valve body 11 to detect the valve body temperature in real time. The compensating spring 42 is securely connected to the dynamic sealing ring 43, providing elastic pressure to ensure the sealing ring remains tightly fitted to the valve body even with temperature changes. The guide sleeve 44 is securely connected to the inlet flange 12 to guide the movement of the dynamic sealing ring 43. The outer casing pipe 47 is located outside the valve body 11 and connects to the cooling box 45, the heating box 46, and the liquid pump 48, respectively. When the temperature deviates from the set range, the liquid pump 48 starts, circulating the cooling or heating medium and adjusting the valve body temperature through the outer casing pipe 47 to ensure reliable valve operation under different temperature conditions. The self-cleaning mechanism 5 enables automatic valve cleaning, ensuring long-term stable operation. The cleaning motor 53 is securely connected to the cleaning block 54, driving its movement and, through a transmission connection, rotating the cleaning brush 51. The lifting hydraulic cylinder 52 is securely connected to the valve body 11, controlling the lifting position of the cleaning block 54 so that the cleaning brush 51 can clean different areas. The cleaning pipe 55 is connected to the valve body 11 to remove dirt generated during the cleaning process. When cleaning is required, the lifting hydraulic cylinder 52 adjusts the position of the cleaning block 54, the cleaning motor 53 starts, and the cleaning brush 51 cleans the inside of the valve body 11, with dirt discharged through the cleaning pipe 55. This design effectively prevents dirt accumulation, reduces the need for manual maintenance, and extends the valve's service life.

[0056] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An exhaust check valve with noise reduction function, characterized in that: The exhaust check valve includes a valve body mechanism (1), a noise reduction mechanism (2), a flow control mechanism (3), a sealing temperature control mechanism (4), and a self-cleaning mechanism (5). The noise reduction mechanism (2) is fastened to the valve body mechanism (1), the flow control mechanism (3) is fastened to the valve body mechanism (1), the sealing temperature control mechanism (4) is fastened to the valve body mechanism (1), and the self-cleaning mechanism (5) is fastened to the valve body mechanism (1). The noise reduction mechanism (2), the flow control mechanism (3), and the self-cleaning mechanism (5) are all located inside the valve body mechanism (1), and the sealing temperature control mechanism (4) is located outside the valve body mechanism (1).

2. The exhaust check valve with noise reduction function according to claim 1, characterized in that: The valve body mechanism (1) includes a valve body (11), an inlet flange (12), an outlet flange (13), a noise reduction body (14), a resonant elastic element (15), a mass block (16), an adjusting elastic element (17), an electromagnetic block (18), and a cleaning chamber (19). The valve body (11) is connected to the inlet flange (12), the outlet flange (13) is connected to the valve body (11), the noise reduction body (14) is connected to the valve body (11), the cleaning chamber (19) is connected to the valve body (11), the mass block (16) and the electromagnetic block (18) are electrically connected, the mass block (16) and the noise reduction body (14) are slidably connected, the electromagnetic block (18) and the noise reduction body (14) are fastened together, the adjusting elastic element (17) and the electromagnetic block (18) are fastened together, and the adjusting elastic element (17) and the mass block (16) are fastened together.

3. The exhaust check valve with noise reduction function according to claim 2, characterized in that: The noise reduction mechanism (2) includes a spiral noise reduction component (21), a porous sound absorption component (22), a first restoring elastic element (23), a first recovery valve (24), a second restoring elastic element (25), and a second recovery valve (26). The spiral noise reduction component (21) is fastened to the air inlet flange (12), the spiral noise reduction component (21) is fastened to the air outlet flange (13), the porous sound absorption component (22) is fastened to the valve body (11), and the first restoring elastic element (23) is fastened to the valve body (11). The first restoring elastic element (23) and the first return valve (24) are fastened together. The first return valve (24) and the valve body (11) are hinged together. The second return valve (26) and the valve body (11) are slidably connected. The second return valve (26) and the second restoring elastic element (25) are fastened together. The second restoring elastic element (25) and the valve body (11) are fastened together. The second restoring elastic element (25) is provided with a rotating protrusion (261), and the rotating protrusion (261) has a crescent-shaped cross section.

4. The exhaust check valve with noise reduction function according to claim 3, characterized in that: The spiral noise reduction assembly (21) includes a spiral block (211), a spiral valve disc (212), a valve stem (213), and a rod elastic element (214). The spiral block (211) is fastened to the air inlet flange (12). The spiral block (211) is provided with a spiral channel (2111). The diameter of the spiral channel (2111) gradually increases. The valve stem (213) and the spiral block (211) are hinged. The spiral valve disc (212) and the valve stem (213) are slidably connected. The rod elastic element (214) and the spiral valve disc (212) are fastened together. The valve stem (213) and the rod elastic element (214) are fastened together.

5. The exhaust check valve with noise reduction function according to claim 4, characterized in that: The porous sound-absorbing component (22) includes a porous sound-absorbing plate (221), a sound-absorbing material filler (222), and an iris component (223). The porous sound-absorbing plate (221) and the iris component (223) are fastened together. The sound-absorbing material filler (222) and the porous sound-absorbing plate (221) are fastened together. The porous sound-absorbing plate (221) and the valve body (11) are fastened together.

6. The exhaust check valve with noise reduction function according to claim 5, characterized in that: The flow control mechanism (3) includes a flow sensor (31), an adjustable orifice plate (32), a guide rod (33), a transmission gear (34), a ball gear (35), and a ball-tooth motor (36). The flow sensor (31) is fastened to the inlet flange (12), the flow sensor (31) is fastened to the outlet flange (13), the adjustable orifice plate (32) is fastened to the inlet flange (12), the ball-tooth motor (36) is fastened to the inlet flange (12), and there are two ball-tooth motors (36) and transmission gears (34). The ball-tooth motors (36) and transmission gears (34) are connected in a transmission manner. The two transmission gears (34) are arranged vertically. The transmission gears (34) and ball gears (35) are connected in a transmission manner. The ball gears (35) and guide rod (33) are connected in a transmission manner.

7. The exhaust check valve with noise reduction function according to claim 6, characterized in that: The sealing temperature control mechanism (4) includes a temperature sensor (41), a compensation spring (42), a dynamic sealing ring (43), a guide sleeve (44), a cooling box (45), a heating box (46), an outer casing pipe (47), and a liquid pump (48). The temperature sensor (41) is fastened to the valve body (11), the compensation spring (42) is fastened to the dynamic sealing ring (43), the guide sleeve (44) is fastened to the air inlet flange (12), the outer casing pipe (47) is located outside the valve body (11), the outer casing pipe (47) is connected to the cooling box (45), the outer casing pipe (47) is connected to the liquid pump (48), and the heating box (46) is connected to the liquid pump (48).

8. The exhaust check valve with noise reduction function according to claim 7, characterized in that: The self-cleaning mechanism (5) includes a cleaning brush (51), a lifting hydraulic cylinder (52), a cleaning motor (53), a cleaning block (54), and a cleaning pipe (55). The cleaning motor (53) and the cleaning block (54) are fastened together. The cleaning motor (53) and the cleaning brush (51) are connected by a drive. The lifting hydraulic cylinder (52) and the valve body (11) are fastened together. The lifting hydraulic cylinder (52) and the cleaning block (54) are connected by a drive. The cleaning pipe (55) and the valve body (11) are connected.

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