Exhaust check valve with noise reduction

Abstract

The application discloses an exhaust check valve with a noise reduction function, and relates to the technical field of check valves.The exhaust check valve comprises 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 and the valve body mechanism are tightly connected, the flow control mechanism and the valve body mechanism are tightly connected, the sealing temperature control mechanism and the valve body mechanism are tightly connected, and the self-cleaning mechanism and the valve body mechanism are tightly connected.The noise reduction mechanism, the flow control mechanism and the self-cleaning mechanism are located in the valve body mechanism, and the sealing temperature control mechanism is located outside the valve body mechanism.A spiral noise reduction assembly guides airflow rotation, reduces flow rate and noise, and the flow control mechanism realizes accurate flow control.The sealing temperature control mechanism is located outside the valve body mechanism, a compensation spring and a dynamic sealing ring ensure the sealing property of the valve at different temperatures, the self-cleaning mechanism regularly cleans the inside of the valve body, and a cleaning pipe discharges dirt.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of check valves, in particular to an exhaust check valve with noise reduction function. BACKGROUND

[0002] With the acceleration of industrialization process, mechanical equipment is increasingly widely used in various industries. As an important part of the exhaust system, its performance directly affects the efficiency of the equipment and the quality of the environment. The traditional exhaust check valve plays an important role in preventing medium backflow, but still has deficiencies in noise control, flow regulation, sealing performance and maintenance convenience. In recent years, in order to meet the needs of environmental protection and efficient production, the market demand for exhaust check valves with noise reduction function, precise flow control, reliable sealing and automatic cleaning is increasing. This has prompted the continuous innovation and development of related technologies, and in the future, exhaust check valves with multiple functions and high performance will have broad application prospects in the industrial field.

[0003] The exhaust check valves on the market at present mainly have single function, usually only have basic check and simple flow control function. Some improved valves add simple sound-absorbing cotton or sound-absorbing board in the valve body to reduce exhaust noise, but the effect is limited. In addition, the flow control mechanism of traditional valves usually relies on manual adjustment, which is difficult to achieve high-precision automatic control. In terms of sealing performance, fixed sealing structure is usually used, which cannot adapt to temperature and pressure changes, resulting in decreased sealing performance. For valve cleaning and maintenance, it usually needs to be disassembled during shutdown, which is time-consuming and affects production efficiency. These existing technologies have limitations in function integration, automation degree and maintenance convenience.

[0004] The existing exhaust check valve is not ideal in noise reduction effect, and cannot effectively reduce high-frequency and specific frequency noise, affecting the working environment and personnel health. In terms of flow control, there is a lack of precise automatic adjustment mechanism, which cannot meet the demand of modern industry for precise flow control. The sealing performance is limited by the fixed structure, which cannot adapt to temperature changes, resulting in increased leakage risk and affecting the safety and reliability of the system. In addition, the traditional valve lacks automatic cleaning function, and the accumulation of dirt can easily cause the valve to jam or fail, which requires frequent shutdown maintenance and reduces production efficiency. Therefore, the technical personnel in the field provide an exhaust check valve with noise reduction function. SUMMARY

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

[0006] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0007] The exhaust valve includes a valve body mechanism, a noise reduction mechanism, a flow control mechanism, a sealing temperature control mechanism and a self-cleaning mechanism.

[0008] By adopting the above technical scheme, the valve body mechanism is composed of a valve main body, an air inlet flange, an air outlet flange, a noise reduction body, a resonance elastic element, a mass block, an adjusting elastic element, an electromagnetic block and a cleaning chamber. The valve main body is in communication with the air inlet flange and the air outlet flange, and gas enters the valve main body from the air inlet flange. The noise reduction body is in communication with the inside of the valve main body, and the inside is provided with the resonance elastic element and the mass block. The mass block is slidably connected with the noise reduction body through the electromagnetic block, and the adjusting elastic element is connected between the electromagnetic block and the mass block, used for adjusting the resonance frequency to realize the absorption and reduction of specific noise. The noise reduction mechanism includes a spiral noise reduction assembly and a porous sound absorption assembly. The spiral noise reduction assembly is composed of a spiral block, a spiral valve flap, a valve rod and a rod elastic element. The spiral block is provided with spiral holes with gradually increasing hole diameters, used for guiding the rotation of the airflow to reduce the flow rate 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 gear motor. The flow sensor monitors the gas flow, and the ball gear motor drives the guide rod through the transmission gear and the ball gear to adjust the position of the adjustable orifice plate, realizing accurate flow control. The sealing temperature control mechanism is located outside the valve body mechanism and includes a temperature sensor, a compensation spring, a dynamic sealing ring, a guide sleeve, a cooling box, a heating box, an outer sleeve pipeline and a liquid pump. The temperature sensor detects the valve temperature, and the liquid pump circulates the cooling or heating medium to adjust the valve body temperature through the outer sleeve pipeline. The compensation spring and the dynamic sealing ring ensure the sealing performance of the valve at different temperatures. The self-cleaning mechanism periodically cleans the inside of the valve body, and a cleaning pipe discharges the dirt. Through the cooperation of these components, the valve realizes effective noise reduction, accurate flow control, reliable sealing and temperature adjustment, and automatic cleaning function, ensuring the efficient and stable operation of the valve.

[0009] Further, the valve body mechanism includes a valve main body, an air inlet flange, an air outlet flange, a noise reduction body, a resonance elastic element, a mass block, an adjusting elastic element, an electromagnetic block and a cleaning chamber. The valve main body is in communication with the air inlet flange, the air outlet flange is in communication with the valve main body, the noise reduction body is in communication with the valve main body, and the cleaning chamber is in communication with the valve main 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 fixedly connected, the adjusting elastic element and the electromagnetic block are fixedly connected, and the adjusting elastic element and the mass block are fixedly connected.

[0010] By adopting the above technical scheme, the valve body communicates with the gas inlet flange and the gas outlet flange to form a main channel for gas flow. The noise reduction body is installed in the valve body and communicates with it, and the inside is provided with a resonance elastic member and a mass block. The mass block is slidingly connected with the noise reduction body and is electrically connected with the electromagnetic block. The electromagnetic block is fixedly installed on the noise reduction body. One end of the adjusting elastic member is fixedly connected to the electromagnetic block, and the other end is fixedly connected to the mass block, forming a mass-spring system that can adjust the resonance frequency of the system. The electromagnetic force generated by the electromagnetic block adjusts the position and vibration characteristics of the mass block, so that the resonance system can absorb noise of a specific frequency to achieve the noise reduction effect. The cleaning chamber communicates with the valve body, facilitating cleaning and maintenance of the internal components to ensure normal operation of the valve. This design utilizes the resonance principle, and the resonance system composed of the mass block, the resonance elastic member and the adjusting elastic member absorbs and attenuates noise of a specific frequency. At the same time, the electromagnetic block allows the system to dynamically adjust the resonance frequency to adapt to the noise characteristics under different working conditions. The overall structure is compact, the components are reasonably connected, the noise is effectively reduced, and the working efficiency and service life of the valve are improved.

[0011] Further, the noise reduction mechanism includes a spiral noise reduction assembly, a porous sound absorption assembly, a first restoring elastic member, a first return valve, a second restoring elastic member, and a second return valve. The spiral noise reduction assembly is fixedly connected with the gas inlet flange and the gas outlet flange. The porous sound absorption assembly is fixedly connected with the valve body. The first restoring elastic member is fixedly connected with the valve body and the first return valve. The first return valve is hingedly connected with the valve body. The second return valve is slidingly connected with the valve body and fixedly connected with the second restoring elastic member. The second restoring elastic member is fixedly connected with the valve body and provided with a rotating protrusion in a half-moon shape in cross section.

[0012] By adopting the above technical scheme, the spiral noise reduction assembly is fixedly connected with the gas inlet flange and the gas outlet flange, forming a spiral channel for gas flow, which promotes the rotation of the gas flow and reduces the flow rate and noise. The porous sound absorption assembly is fixedly connected with the valve body and filled with sound absorption material inside, which absorbs the remaining noise by using the porous structure. One end of the first return elastic member is fixedly connected with the valve body, and the other end is fixedly connected with the first return valve. The first return valve is hingedly connected with the valve body and can be opened or closed under the action of the elastic member to control the gas flow and further reduce the noise. The second return valve is slidingly connected with the valve body and fixedly connected with the second restoring elastic member. The second restoring elastic member is also fixedly connected with the valve body and provided with a rotating protrusion in a half-moon shape in cross section. This design allows the rotating protrusion to rotate smoothly, adjusts the position of the second return valve, adapts to changes in gas flow, and enhances the 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 the sensitivity and sealing performance of the valve are ensured, and the overall performance of the exhaust check valve is improved.

[0013] Further, the spiral noise reduction assembly includes a spiral block, a spiral valve, a valve stem, and a stem elastic element. The spiral block is fixedly connected with the air inlet flange, and a spiral channel is arranged on the spiral block. The diameter of the spiral channel gradually increases. The valve stem is hingedly connected with the spiral block. The spiral valve is slidingly connected with the valve stem. The stem elastic element is fixedly connected with the spiral valve. The valve stem is fixedly connected with the stem elastic element.

[0014] By adopting the above technical solution, the spiral block is fixedly connected with the air inlet flange, and a spiral channel is arranged on the spiral block. The diameter of the spiral channel gradually increases. When the gas enters from the air inlet, the gas is guided to flow spirally through the spiral channel of the spiral block. As the diameter increases, the gas flow velocity gradually decreases, and the pressure is relieved, achieving the effect of noise reduction. The valve stem is hingedly connected with the spiral block, allowing the valve stem to rotate within a certain angle range. The spiral valve is slidingly connected with the valve stem, allowing the spiral valve to freely move along the valve stem. One end of the stem elastic element is fixedly connected with the spiral valve, and the other end is fixedly connected with the valve stem, providing elastic restoring force. When the gas flow changes, the stem elastic element adjusts the position of the spiral valve in time, ensuring smooth gas flow and stable noise reduction effect. Through the synergistic effect of the above components, the gas forms a smooth spiral flow in the spiral channel, reducing turbulence and noise, achieving efficient noise reduction function, and improving the performance and reliability of the valve.

[0015] Further, the porous sound absorption assembly includes a porous sound absorption plate, a sound absorption material filler, and an iris assembly. The porous sound absorption plate is fixedly connected with the iris assembly. The sound absorption material filler is fixedly connected with the porous sound absorption plate. The porous sound absorption plate is fixedly connected with the valve body.

[0016] By adopting the above technical solution, the porous sound absorption plate is fixedly connected in the valve body and fixedly connected with the iris assembly, forming a structure for adjusting the gas flow channel. The sound absorption material filler is tightly filled in the pores of the porous sound absorption plate, enhancing the sound absorption effect. During operation, the gas passes through the iris assembly, and the iris assembly controls the speed and flow of the gas flow by adjusting the size of the aperture. Subsequently, the gas flow enters the porous sound absorption plate, and the sound waves are reflected and attenuated multiple times in the pores. The sound absorption material filler further absorbs sound energy, reducing noise. This design utilizes the combination of porous structure and sound absorption material, as well as the precise control of the gas flow by the iris assembly, achieving efficient noise reduction effect while ensuring the flow regulation function of the valve.

[0017] Further, the flow control mechanism includes a flow sensor, an adjustable orifice plate, a guide rod, a transmission gear, a ball gear and a ball gear motor, the flow sensor is fixedly connected with the inlet flange, the flow sensor is fixedly connected with the outlet flange, the adjustable orifice plate is fixedly connected with the inlet flange, the ball gear motor is fixedly connected with the inlet flange, the ball gear motor is provided with two transmission gears, the ball gear motor is in transmission connection with the transmission gears, the transmission gears are vertically arranged, the transmission gears are in transmission connection with the ball gear, and the ball gear is in transmission connection with the guide rod.

[0018] By adopting the above technical scheme, the flow sensor is fixedly connected with the inlet flange and the outlet flange, respectively, to monitor the gas flow entering and flowing out of the valve in real time. The adjustable orifice plate is fixedly connected with the inlet flange, and the gas flow can be adjusted by changing the hole diameter. The ball gear motor is also fixedly connected with the inlet flange, and is provided with two ball gear motors and two transmission gears. Each ball gear motor is in transmission connection with a transmission gear, and the two transmission gears are vertically arranged to be more effectively arranged in space. The transmission gears are in transmission connection with the ball gear, and the ball gear is in transmission connection with the guide rod. When the flow sensor detects that the gas flow needs to be adjusted, a signal is transmitted to the ball gear motor. After the ball gear motor is started, power is transmitted to the ball gear through the transmission gears, the ball gear changes the transmission direction of the power, and the rotary motion is transmitted to the guide rod. The guide rod drives the position change of the adjustable orifice plate under rotary or linear motion, adjusts the hole diameter of the adjustable orifice plate, and accurately controls the flow of the gas. The vertical arrangement of the two transmission gears makes the power transmission more smooth, and reduces mechanical loss. Through this design, the ball gear motor, the transmission gear, the ball gear and the guide rod are accurately matched to realize high-precision control of the adjustable orifice plate, and then accurately adjust the flow of the valve. The mechanism responds quickly, has high control precision, and ensures that the valve can maintain the best flow state under different working conditions, thereby improving the efficiency and reliability of the system.

[0019] Further, the sealing temperature control mechanism includes a temperature sensor, a compensation spring, a dynamic sealing ring, a guide sleeve, a cooling box, a heating box, an outer sleeve pipeline and a liquid pump, the temperature sensor is fixedly connected with the valve body, the compensation spring is fixedly connected with the dynamic sealing ring, the guide sleeve is fixedly connected with the inlet flange, the outer sleeve pipeline is arranged outside the valve body, the outer sleeve pipeline is in communication with the cooling box, the outer sleeve pipeline is in communication with the liquid pump, and the heating box is in communication with the liquid pump.

[0020] By adopting the above technical scheme, the temperature sensor is fastened to the valve body to monitor the temperature change of the valve in real time; the compensation elastic member is fastened to the dynamic sealing ring to provide elastic pressure and ensure that the dynamic sealing ring maintains good sealing with the valve body at different temperatures; the guide sleeve is fastened to the air inlet flange to guide the axial movement of the dynamic sealing ring; the outer sleeve pipeline is arranged outside the valve body and communicates with the cooling tank and the liquid pump, and the valve body temperature is reduced by circulating the cooling medium through the liquid pump; at the same time, the outer sleeve pipeline also communicates with the heating tank and the liquid pump, and when the temperature needs to be raised, the liquid pump delivers the heating medium to the outer sleeve pipeline 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 pipeline, so that the valve body temperature returns to the normal range; the compensation spring and the dynamic sealing ring cooperate to ensure that the sealing performance of the valve is not affected during the temperature change. Through this design, automatic temperature control and reliable sealing of the valve under different temperature conditions are realized, and stable operation and service life of the valve are ensured.

[0021] Further, 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, the cleaning motor and the cleaning brush are in transmission connection, the lifting hydraulic cylinder and the valve body are fastened, the lifting hydraulic cylinder and the cleaning block are in transmission connection, and the cleaning pipe and the valve body are in communication.

[0022] By adopting the above technical scheme, the cleaning motor is fastened to the cleaning block to drive the movement of the cleaning block; the cleaning motor drives the cleaning brush to rotate through the transmission connection to clean the inside of the valve body. The lifting hydraulic cylinder is fastened to the valve body to control the lifting position of the cleaning block through the transmission connection, so that the cleaning brush can reach different cleaning areas. The cleaning pipe is in communication with the valve body for discharging dirt generated during cleaning. When cleaning is needed, the lifting hydraulic cylinder adjusts the position of the cleaning block, the cleaning motor is started to drive the cleaning brush to rotate and clean the inner wall of the valve body; the dirt generated during cleaning is discharged through the cleaning pipe. Through the synergistic effect of the above components, the automatic cleaning function of the valve is realized, and the normal operation and service life of the valve are ensured.

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

[0024] Noise reduction: through the synergistic effect of each part in the noise reduction mechanism, effective noise reduction is realized. The spiral block in the spiral noise reduction assembly is fastened to the air inlet flange and has a spiral hole with gradually increasing hole diameter. After the gas enters the spiral hole, it is guided to flow in a spiral shape, and as the hole diameter increases, the airflow velocity gradually decreases and the pressure is relieved, achieving the effect of noise reduction. The spiral valve flap is hinged to the screw block through the valve rod, and the rod elastic member is connected between the valve rod and the spiral valve flap to provide elastic restoring force, ensuring that the valve flap adjusts the position in time with the change of airflow and maintains the stability of the noise reduction effect.

[0025] Flow control and system efficiency improvement: The flow control mechanism realizes precise control of gas flow through the precise fit of various parts. The flow sensor is tightly connected with the inlet flange and outlet flange, and monitors the gas flow in real time. The adjustable orifice is tightly connected with the inlet flange, and its position is controlled by the guide rod. The ball tooth motor is tightly connected with the inlet flange, and is provided with two ball tooth motors and two transmission gears, which are vertically arranged to optimize the space. The ball tooth motor drives the transmission gear, which in turn drives the ball gear. Finally, through the transmission connection between the ball gear and the guide rod, the position and aperture size of the adjustable orifice are accurately adjusted, realizing precise control of the gas flow and improving the efficiency and reliability of the system.

[0026] Reliable sealing and temperature control: The sealing and temperature control mechanism ensures the sealing and stability of the valve through temperature sensing and automatic adjustment. The temperature sensor is tightly connected with the valve body and detects the valve temperature in real time. The compensation spring is tightly connected with the dynamic sealing ring and provides elastic pressure to ensure that the sealing ring can tightly fit the valve body even when the temperature changes. The guide sleeve is tightly connected with the inlet flange and guides the movement of the dynamic sealing ring. The outer sleeve pipeline is arranged outside the valve body and is connected with the cooling box, heating box and liquid pump. When the temperature deviates from the set range, the liquid pump starts to circulate the cooling or heating medium, adjusts the valve temperature through the outer sleeve pipeline, and ensures the reliable operation of the valve under different temperature conditions.

[0027] Automatic cleaning function to prolong the service life of the equipment: The automatic cleaning mechanism ensures long-term stable operation of the valve. The cleaning motor is tightly connected with the cleaning block and drives the movement of the cleaning block, and the cleaning brush is rotated through the transmission connection. The lifting hydraulic cylinder is tightly connected with the valve body and controls the lifting position of the cleaning block, so that the cleaning brush can clean different areas. The cleaning pipe is connected with the valve body and is used to discharge the dirt generated during cleaning. When cleaning is needed, the lifting hydraulic cylinder adjusts the position of the cleaning block, the cleaning motor starts to drive the cleaning brush to clean the inside of the valve body, and the dirt is discharged through the cleaning pipe. This design effectively prevents dirt accumulation, reduces the need for manual maintenance, and prolongs the service life of the valve. BRIEF DESCRIPTION OF DRAWINGS

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

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

[0030] Figure 3 The figure is a schematic diagram of the resonance elastic element structure of the invention;

[0031] Figure 4 The figure is a schematic diagram of the spiral noise reduction assembly structure of the invention;

[0032] Figure 5 The second return valve structure schematic diagram of the present application;

[0033] Figure 6 The porous sound absorption assembly structure schematic diagram of the present application;

[0034] Figure 7 The flow control mechanism structure schematic diagram of the present application;

[0035] Figure 8 The self-cleaning mechanism structure schematic diagram of the present application.

[0036] In the figure: 1, valve body mechanism; 11, valve main body; 12, air inlet flange; 13, air outlet flange; 14, noise reduction body; 15, resonance elastic piece; 16, mass block; 17, adjusting elastic piece; 18, electromagnetic block; 19, cleaning chamber; 2, noise reduction mechanism; 21, spiral noise reduction assembly; 211, spiral block; 2111, spiral hole; 212, spiral valve flap; 213, valve rod; 214, rod elastic piece; 22, porous sound absorption assembly; 221, porous sound absorption plate; 222, sound absorption material filler; 223, iris assembly; 23, first restoring elastic piece; 24, first return valve; 25, second restoring elastic piece; 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, compensation spring; 43, active sealing ring; 44, guide sleeve; 45, cooling box; 46, heating box; 47, outer sleeve 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 DESCRIPTION

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0038] Please refer to Figure 1 - Figure 8 As shown in the figure, the present application provides a technical solution of an exhaust check valve with noise reduction function:

[0039] The exhaust 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 and the valve body mechanism 1 are tightly connected, the flow control mechanism 3 and the valve body mechanism 1 are tightly connected, the sealing temperature control mechanism 4 and the valve body mechanism 1 are tightly connected, and the self-cleaning mechanism 5 and the valve body mechanism 1 are tightly connected. The noise reduction mechanism 2, the flow control mechanism 3, and the self-cleaning mechanism 5 are located inside the valve body mechanism 1, and the sealing temperature control mechanism 4 is located outside the valve body mechanism 1.

[0040] By adopting the above technical scheme, the valve body mechanism 1 is composed of a valve main body 11, an air inlet flange 12, an air outlet flange 13, a noise reduction body 14, a resonance elastic element 15, a mass block 16, an adjusting elastic element 17, an electromagnetic block 18, and a cleaning chamber 19. The valve main body 11 is in communication with the air inlet flange 12 and the air outlet flange 13, and gas enters the valve main body 11 from the air inlet flange 12. The noise reduction body 14 is in communication with the inside of the valve main body 11, and the inside is provided with the resonance elastic element 15 and the mass block 16. The mass block 16 is slidably connected with the noise reduction body 14 through the electromagnetic block 18, and the adjusting elastic element 17 is connected between the electromagnetic block 18 and the mass block 16, which is used to adjust the resonance frequency, so as to realize the absorption and reduction of specific noise. The noise reduction mechanism 2 includes a spiral noise reduction assembly 21 and a porous sound absorption assembly 22. The spiral noise reduction assembly 21 is composed of a spiral block 211, a spiral valve flap 212, a valve rod 213, and a rod elastic element 214. The spiral block 211 is provided with spiral holes 2111 with gradually increasing hole diameters, which guide the rotation of the airflow and reduce the flow rate 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, and the ball gear motor 36 drives the guide rod 33 through the transmission gear 34 and the ball gear 35, adjusts the position of the adjustable orifice plate 32, and realizes accurate flow control. The sealing temperature control mechanism 4 is located outside the valve body mechanism 1 and includes a temperature sensor 41, a compensation spring 42, a dynamic sealing ring 43, a guide sleeve 44, a cooling tank 45, a heating tank 46, an outer sleeve pipe 47, and a liquid pump 48. The temperature sensor 41 detects the temperature of the valve, the liquid pump 48 circulates the cooling or heating medium, and the outer sleeve pipe 47 adjusts the temperature of the valve body. The compensation spring 42 and the dynamic sealing ring 43 ensure the sealing performance of the valve at different temperatures. The self-cleaning mechanism 5 periodically cleans the inside of the valve body, and the cleaning pipe 55 discharges the dirt. Through the cooperation of these components, the valve realizes effective noise reduction, accurate flow control, reliable sealing and temperature adjustment, and automatic cleaning function, which ensures the efficient and stable operation of the valve.

[0041] Further, the valve body mechanism 1 comprises a valve body 11, an air inlet flange 12, an air outlet flange 13, a noise reduction body 14, a resonance 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 and the air inlet flange 12 are in communication, the air outlet flange 13 and the valve body 11 are in communication, the noise reduction body 14 and the valve body 11 are in communication, the cleaning chamber 19 and the valve body 11 are in communication, the mass block 16 and the electromagnetic block 18 are electrically connected, the mass block 16 and the noise reduction body 14 are slidingly connected, the electromagnetic block 18 and the noise reduction body 14 are fixedly connected, the adjusting elastic element 17 and the electromagnetic block 18 are fixedly connected, and the adjusting elastic element 17 and the mass block 16 are fixedly connected.

[0042] By adopting the above technical scheme, the valve body 11 is in communication with the air inlet flange 12 and the air outlet flange 13 to form a main channel for gas flow. The noise reduction body 14 is installed in the valve body 11 and is in communication therewith, and the resonance elastic element 15 and the mass block 16 are arranged inside. The mass block 16 is slidingly connected with the noise reduction body 14 and is electrically connected with the noise reduction body 14 through the electromagnetic block 18. The electromagnetic block 18 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 that can adjust the resonance frequency of the system. The position and vibration characteristics of the mass block 16 are adjusted by the electromagnetic force generated by the electromagnetic block 18, so that the resonance system can absorb noise of a specific frequency, achieving a noise reduction effect. The cleaning chamber 19 is in communication with the valve body 11, facilitating cleaning and maintenance of the internal components to ensure normal operation of the valve. This design utilizes the resonance principle, and the resonance system composed of the mass block 16, the resonance elastic element 15, and the adjusting elastic element 17 absorbs and attenuates noise of a specific frequency. At the same time, the electromagnetic block 18 allows the system to dynamically adjust the resonance frequency to adapt to noise characteristics under different working conditions. The overall structure is compact, the connections between components are reasonable, noise is effectively reduced, and the working efficiency and service life of the valve are improved.

[0043] Further, the noise reduction mechanism 2 comprises a spiral noise reduction assembly 21, a porous sound absorption assembly 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 assembly 21 is fixedly connected with the air inlet flange 12, the spiral noise reduction assembly 21 is fixedly connected with the air outlet flange 13, the porous sound absorption assembly 22 is fixedly connected with the valve body 11, the first restoring elastic element 23 is fixedly connected with the valve body 11, the first restoring elastic element 23 is fixedly connected with the first return valve 24, the first return valve 24 is hingedly connected with the valve body 11, the second return valve 26 is slidingly connected with the valve body 11, the second return valve 26 is fixedly connected with the second restoring elastic element 25, the second restoring elastic element 25 is fixedly connected with the valve body 11, and the second restoring elastic element 25 is provided with a rotating protrusion 261 in the form of a half-moon.

[0044] By adopting the technical scheme, the spiral noise reduction assembly 21 is fastened and connected with the air inlet flange 12 and the air outlet flange 13 respectively, a spiral channel for gas flow is formed, the gas flow is rotated, the flow rate is reduced, and the noise is reduced. The porous sound absorption assembly 22 is fixed in the valve body 11 and filled with sound absorption material inside, and the remaining noise is absorbed by using the porous structure. One end of the first elastic recovery member 23 is fastened and connected with the valve body 11, the other end is fastened and connected with the first return valve 24, the first return valve 24 is hinged with the valve body 11, can be opened or closed under the action of the elastic member, controls the gas flow and further reduces the noise. The second return valve 26 is slidingly connected with the valve body 11 and is fixedly connected with the second elastic recovery member 25, the second elastic recovery member 25 is also fastened and connected with the valve body 11, and a rotating protrusion 261 is arranged on the second elastic recovery member 25, the cross section of the rotating protrusion 261 is half-moon-shaped, the design enables the rotating protrusion 261 to rotate smoothly, adjusts the position of the second return valve 26, adapts to the change of the gas flow, and enhances the sealing performance and the noise reduction effect. Through the synergistic effect of the above-mentioned components, the gas is effectively noise-reduced when passing through the valve, the sensitivity and the sealing performance of the valve are ensured, and the overall performance of the exhaust check valve is improved.

[0045] Further, the spiral noise reduction assembly 21 comprises a spiral block 211, a spiral valve disc 212, a valve rod 213 and a rod elastic member 214, the spiral block 211 is fastened and connected with the air inlet flange 12, the spiral block 211 is provided with a spiral hole channel 2111, the hole diameter of the spiral hole channel 2111 gradually increases, the valve rod 213 is hinged with the spiral block 211, the spiral valve disc 212 is slidingly connected with the valve rod 213, the rod elastic member 214 is fastened and connected with the spiral valve disc 212, and the valve rod 213 is fastened and connected with the rod elastic member 214.

[0046] By adopting the technical scheme, the spiral block 211 is fastened and connected with the air inlet flange 12, and is provided with the spiral hole channel 2111, the hole diameter of the spiral hole channel 2111 gradually increases. When the gas enters from the air inlet, the gas is guided to flow spirally through the spiral hole channel 2111 of the spiral block 211, the flow rate of the gas gradually decreases with the increase of the hole diameter, the pressure is relieved, and the noise reduction effect is achieved. The valve rod 213 is hingedly connected with the spiral block 211, allowing the valve rod 213 to rotate within a certain angle range. The spiral valve disc 212 is slidingly connected with the valve rod 213, and can freely move along the direction of the valve rod 213. One end of the rod elastic member 214 is fastened and connected with the spiral valve disc 212, and the other end is fastened and connected with the valve rod 213, providing elastic recovery force. When the gas flow changes, the rod elastic member 214 adjusts the position of the spiral valve disc 212 in time, ensuring the smoothness of the gas flow and the stability of the noise reduction effect. Through the synergistic effect of the above-mentioned components, the gas forms a smooth spiral flow in the spiral hole channel 2111, the turbulent flow and the noise are reduced, the high-efficiency noise reduction function is achieved, and the performance and the reliability of the valve are improved.

[0047] Further, the porous sound-absorbing assembly 22 comprises a porous sound-absorbing plate 221, a sound-absorbing material filler 222, and an iris assembly 223, the porous sound-absorbing plate 221 and the iris assembly 223 are fixedly connected, the sound-absorbing material filler 222 and the porous sound-absorbing plate 221 are fixedly connected, and the porous sound-absorbing plate 221 and the valve body 11 are fixedly connected.

[0048] By adopting the above technical scheme, the porous sound-absorbing plate 221 is fixedly connected in the valve body 11 and fixedly connected with the iris assembly 223, forming a structure for adjusting the air flow channel. The sound-absorbing material filler 222 is tightly filled in the pores of the porous sound-absorbing plate 221, enhancing the sound-absorbing effect. In operation, the gas passes through the iris assembly 223, and the iris assembly 223 controls the speed and flow of the air flow by adjusting the aperture size. Then, the air flow enters the porous sound-absorbing plate 221, and the sound wave is reflected and attenuated multiple times in the pores, and the sound-absorbing material filler 222 further absorbs sound energy to reduce noise. The design utilizes the combination of the porous structure and the sound-absorbing material, and the precise control of the air flow by the iris assembly 223, achieving a high-efficiency noise reduction effect while ensuring the flow regulation function of the valve.

[0049] Further, the flow control mechanism 3 comprises 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 and the inlet flange 12 are fixedly connected, the flow sensor 31 and the outlet flange 13 are fixedly connected, the adjustable orifice plate 32 and the inlet flange 12 are fixedly connected, the ball gear motor 36 and the inlet flange 12 are fixedly connected, the ball gear motor 36 and the transmission gear 34 are provided with two, the ball gear motor 36 and the transmission gear 34 are in transmission connection, the two transmission gears 34 are vertically arranged, the transmission gear 34 and the ball gear 35 are in transmission connection, and the ball gear 35 and the guide rod 33 are in transmission connection.

[0050] By adopting the above technical scheme, the flow sensor 31 is fastened and connected with the inlet flange 12 and the outlet flange 13 respectively, and the gas flow entering and flowing out of the valve is monitored in real time. The adjustable orifice plate 32 is fastened and connected with the inlet flange 12, and the gas flow can be adjusted by changing the aperture size. The ball tooth motor 36 is also fastened and connected with the inlet flange 12, and two ball tooth motors 36 and two transmission gears 34 are arranged. Each ball tooth motor 36 is in transmission connection with one transmission gear 34, and the two transmission gears 34 are arranged vertically to be more effectively arranged in space. The transmission gear 34 is in transmission connection with the ball gear 35, and the ball gear 35 is further in transmission connection with the guide rod 33. When the flow sensor 31 detects that the gas flow needs to be adjusted, a signal is transmitted to the ball tooth motor 36. After the ball tooth motor 36 is started, power is transmitted to the ball gear 35 through the transmission gear 34, and the ball gear 35 changes the power transmission direction to transmit the rotary motion to the guide rod 33. The guide rod 33 drives the position change of the adjustable orifice plate 32 under rotary or linear motion, adjusts the aperture size of the adjustable orifice plate, and accurately controls the gas flow. The vertical arrangement of the two transmission gears 34 makes the power transmission more smooth, and reduces the mechanical loss. Through this design, the ball tooth motor 36, the transmission gear 34, the ball gear 35 and the guide rod 33 are accurately matched to realize high-precision control of the adjustable orifice plate 32, and then the flow of the valve is accurately adjusted. The mechanism responds quickly, has high control precision, and ensures that the valve can maintain the best flow state under different working conditions, improves the efficiency and reliability of the system.

[0051] Further, 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 sleeve pipeline 47 and a liquid pump 48. The temperature sensor 41 is fastened and connected with the valve body 11, the compensation spring 42 is fastened and connected with the dynamic sealing ring 43, the guide sleeve 44 is fastened and connected with the inlet flange 12, the outer sleeve pipeline 47 is arranged outside the valve body 11, the outer sleeve pipeline 47 is in communication with the cooling box 45, the outer sleeve pipeline 47 is in communication with the liquid pump 48, and the heating box 46 is in communication with the liquid pump 48.

[0052] By adopting the above technical scheme, the temperature sensor 41 is tightly connected with the valve body 11 to monitor the temperature change of the valve in real time; the compensation elastic piece is tightly connected with the dynamic sealing ring 43 to provide elastic pressure and ensure that the dynamic sealing ring 43 maintains good sealing with the valve body at different temperatures; the guide sleeve 44 is tightly connected with the air inlet flange 12 to guide the axial movement of the dynamic sealing ring 43; the outer sleeve pipeline 47 is arranged outside the valve body 11 and communicates with the cooling box 45 and the liquid pump 48, and the liquid pump 48 circulates the cooling medium to reduce the temperature of the valve body; at the same time, the outer sleeve pipeline 47 also communicates with the heating box 46 and the liquid pump 48, and when heating is needed, the liquid pump 48 delivers the heating medium to the outer sleeve pipeline 47 to increase the temperature of the valve body. When the temperature sensor 41 detects that the temperature of the valve body deviates from the set range, the control system starts the liquid pump 48 to circulate the cooling or heating medium through the outer sleeve pipeline 47 to restore the temperature of the valve body to the normal range; the compensation spring 42 and the dynamic sealing ring 43 cooperate to ensure that the sealing performance of the valve is not affected during temperature change. Through this design, automatic temperature control and reliable sealing of the valve under different temperature conditions are realized, and stable operation and service life of the valve are ensured.

[0053] Further, 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 tightly connected, the cleaning motor 53 and the cleaning brush 51 are drivingly connected, the lifting hydraulic cylinder 52 and the valve body 11 are tightly connected, the lifting hydraulic cylinder 52 and the cleaning block 54 are drivingly connected, and the cleaning pipe 55 communicates with the valve body 11.

[0054] By adopting the above technical scheme, the cleaning motor 53 is tightly connected with the cleaning block 54 to drive the movement of the cleaning block 54; the cleaning motor 53 drives the cleaning brush 51 to rotate through the driving connection to clean the inside of the valve body 11. The lifting hydraulic cylinder 52 is tightly connected with the valve body 11 to control the lifting position of the cleaning block 54 through the driving connection, so that the cleaning brush 51 can reach different cleaning areas. The cleaning pipe 55 communicates with the valve body 11 to discharge the dirt generated during cleaning. When cleaning is needed, the lifting hydraulic cylinder 52 adjusts the position of the cleaning block 54, the cleaning motor 53 is started to drive the cleaning brush 51 to rotate and clean the inner wall of the valve body 11; the dirt generated during cleaning is discharged through the cleaning pipe 55. Through the cooperation of the above components, the automatic cleaning function of the valve is realized, and the normal operation and service life of the valve are ensured.

[0055] The working principle of the present application: through the synergistic effect of each part in the noise reduction mechanism 2, the effective reduction of noise is realized. The spiral block 211 in the spiral noise reduction assembly 21 is tightly connected with the air inlet flange 12, and is provided with a spiral hole 2111 with gradually increasing hole diameter. After the gas enters the spiral hole 2111, it is guided to flow in a spiral shape. With the increase of the hole diameter, the gas flow velocity gradually decreases, the pressure is relieved, and the effect of noise reduction is achieved. The spiral valve 212 is hinged with the spiral block 211 through the valve rod 213, and the rod elastic element 214 is connected between the valve rod 213 and the spiral valve 212, providing elastic restoring force to ensure that the valve flap adjusts the position in time with the change of gas flow, and maintains the stability of the noise reduction effect. The flow control mechanism 3 realizes accurate control of the gas flow through the precise cooperation of each part. The flow sensor 31 is tightly connected with the air inlet flange 12 and the air outlet flange 13 respectively, and monitors the gas flow in real time. The adjustable orifice plate 32 is tightly connected with the air inlet flange 12, and its position is controlled by the guide rod 33. The ball tooth motor 36 is tightly connected with the air inlet flange 12, and is provided with two ball tooth motors 36 and two transmission gears 34, which are vertically arranged to optimize the space. The ball tooth motor 36 drives the transmission gear 34, and the transmission gear 34 drives the ball gear 35, and finally the ball gear 35 is connected with the guide rod 33 through the transmission connection, so as to accurately adjust the position and hole diameter of the adjustable orifice plate 32, realize the accurate control of the gas flow, and improve the efficiency and reliability of the system. The sealing temperature control mechanism 4 ensures the sealing and stability of the valve through temperature sensing and active adjustment. The temperature sensor 41 is tightly connected with the valve body 11, and detects the temperature of the valve body in real time. The compensation spring 42 is tightly connected with the dynamic sealing ring 43, and provides elastic pressure to ensure that the sealing ring can tightly fit the valve body when the temperature changes. The guide sleeve 44 is tightly connected with the air inlet flange 12, and guides the movement of the dynamic sealing ring 43. The outer sleeve pipe 47 is arranged outside the valve body 11, and is communicated with 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 to circulate the cooling or heating medium, adjusts the temperature of the valve body through the outer sleeve pipe 47, and ensures the reliable operation of the valve under different temperature conditions. Through the design of the self-cleaning mechanism 5, the automatic cleaning of the valve is realized, and the long-term stable operation is ensured. The cleaning motor 53 is tightly connected with the cleaning block 54, drives the movement of the cleaning block 54, and drives the rotation of the cleaning brush 51 through the transmission connection. The lifting hydraulic cylinder 52 is tightly connected with the valve body 11, controls the lifting position of the cleaning block 54, so that the cleaning brush 51 can clean different areas. The cleaning pipe 55 is communicated with the valve body 11, and is used to discharge the dirt generated in the cleaning process. When cleaning is needed, the lifting hydraulic cylinder 52 adjusts the position of the cleaning block 54, the cleaning motor 53 starts to drive the cleaning brush 51 to clean the inside of the valve body 11, and the dirt is discharged through the cleaning pipe 55. This design effectively prevents the accumulation of dirt, reduces the need for manual maintenance, and prolongs the service life of the valve.

[0056] It will be apparent to those skilled in the art that the application is not limited to the details of the above-exemplified embodiments and that the present application can be implemented in other particular forms without departing from the spirit or essential characteristics of the present application. The embodiments should therefore be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the above description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. No reference signs in the claims should be considered as limiting the scope of the claims with respect to the figures of the patent document.

Claims

1. An exhaust check valve with noise reduction, characterized by: The exhaust check valve comprises 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 valve body mechanism (1) comprises a valve main body (11), an air inlet flange (12), an air outlet flange (13), a noise reduction body (14), a resonance elastic piece (15), a mass block (16), an adjusting elastic piece (17), an electromagnetic block (18) and a cleaning chamber (19), the valve main body (11) is communicated with the air inlet flange (12), the air outlet flange (13) is communicated with the valve main body (11), the noise reduction body (14) is communicated with the valve main body (11), the cleaning chamber (19) is communicated with the valve main body (11), the mass block (16) is electrically connected with the electromagnetic block (18), the mass block (16) is slidingly connected with the noise reduction body (14), the electromagnetic block (18) is fixedly connected with the noise reduction body (14), the adjusting elastic piece (17) is fixedly connected with the electromagnetic block (18), and the adjusting elastic piece (17) is fixedly connected with the mass block (16); The noise reduction mechanism (2) comprises a spiral noise reduction assembly (21), a porous sound absorption assembly (22), a first restoring elastic piece (23), a first return valve (24), a second restoring elastic piece (25) and a second return valve (26), the spiral noise reduction assembly (21) is fixedly connected with the air inlet flange (12), the spiral noise reduction assembly (21) is fixedly connected with the air outlet flange (13), the porous sound absorption assembly (22) is fixedly connected with the valve main body (11), the first restoring elastic piece (23) is fixedly connected with the valve main body (11), the first restoring elastic piece (23) is fixedly connected with the first return valve (24), the first return valve (24) is hingedly connected with the valve main body (11), the second return valve (26) is slidingly connected with the valve main body (11), the second return valve (26) is fixedly connected with the second restoring elastic piece (25), the second restoring elastic piece (25) is fixedly connected with the valve main body (11), a rotating protrusion (261) is arranged on the second restoring elastic piece (25), and a section of the rotating protrusion (261) is in the shape of a half moon; The spiral noise reduction assembly (21) comprises a spiral block (211), a spiral valve flap (212), a valve rod (213) and a rod elastic piece (214), the spiral block (211) is fixedly connected with the air inlet flange (12), a spiral hole (2111) is arranged on the spiral block (211), the diameter of the spiral hole (2111) gradually increases, the valve rod (213) is hingedly connected with the spiral block (211), the spiral valve flap (212) is slidingly connected with the valve rod (213), the rod elastic piece (214) is fixedly connected with the spiral valve flap (212), and the valve rod (213) is fixedly connected with the rod elastic piece (214). The flow control mechanism (3) and the valve body mechanism (1) are fastened, the sealing temperature control mechanism (4) and the valve body mechanism (1) are fastened, the self-cleaning mechanism (5) and the valve body mechanism (1) are fastened, the noise reduction mechanism (2), the flow control mechanism (3), the self-cleaning mechanism (5) are located in 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 porous sound-absorbing assembly (22) comprises a porous sound-absorbing plate (221), a sound-absorbing material filler (222) and an iris assembly (223), the porous sound-absorbing plate (221) and the iris assembly (223) are fastened, the sound-absorbing material filler (222) and the porous sound-absorbing plate (221) are fastened, and the porous sound-absorbing plate (221) and the valve body (11) are fastened.

3. The noise-reducing exhaust check valve of claim 2, wherein: The flow control mechanism (3) comprises 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) and the air inlet flange (12) are fastened, the flow sensor (31) and the air outlet flange (13) are fastened, the adjustable orifice plate (32) and the air inlet flange (12) are fastened, the ball gear motor (36) and the air inlet flange (12) are fastened, the ball gear motor (36) and the transmission gear (34) are provided with two, the ball gear motor (36) and the transmission gear (34) are in transmission connection, the two transmission gears (34) are vertically arranged, the transmission gear (34) and the ball gear (35) are in transmission connection, and the ball gear (35) and the guide rod (33) are in transmission connection.

4. The noise-reducing exhaust check valve of claim 3, wherein: The sealing temperature control mechanism (4) comprises 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 sleeve pipeline (47) and a liquid pump (48), the temperature sensor (41) and the valve body (11) are fastened, the compensation spring (42) and the dynamic sealing ring (43) are fastened, the guide sleeve (44) and the air inlet flange (12) are fastened, the outer sleeve pipeline (47) is arranged outside the valve body (11), the outer sleeve pipeline (47) and the cooling box (45) are in communication, the outer sleeve pipeline (47) and the liquid pump (48) are in communication, and the heating box (46) and the liquid pump (48) are in communication.

5. The noise-reducing exhaust check valve of claim 4, wherein: The self-cleaning mechanism (5) comprises 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, the cleaning motor (53) and the cleaning brush (51) are in transmission connection, the lifting hydraulic cylinder (52) and the valve body (11) are fastened, the lifting hydraulic cylinder (52) and the cleaning block (54) are in transmission connection, and the cleaning pipe (55) and the valve body (11) are in communication.

Images