Gas flow adjusting device
By combining mechanical linkage and elastic deformation structure with PID control and PLC system, continuous stepless regulation of gas flow and multi-valve coordinated control are realized, which solves the problems of inaccurate adjustment and poor reliability of traditional valves and improves the stability and efficiency of the smoke exhaust system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2026-03-13
- Publication Date
- 2026-04-14
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
Traditional valves cannot achieve stepless and precise adjustment of gas flow, their structure is easily affected by the environment, resulting in poor reliability, and it is difficult to achieve intelligent collaborative control of multiple valves, leading to uneven smoke exhaust and low production efficiency.
Employing a unique mechanical linkage and elastic deformation structure, combined with a PID control module and PLC system, it achieves continuous stepless adjustment of gas flow and multi-valve coordinated control. The motor drives a double-rotating T-shaped lead screw to drive the threaded cylinder and guide cylinder, which in turn causes the elastic body to deform. With the help of pressure sensors and detection mechanisms, it achieves precise position control and dynamic adjustment.
It enables continuous, precise, and rapid automatic adjustment of gas flow, improves the stability and efficiency of the smoke exhaust system, reduces manual intervention, and meets the needs of automated and intelligent production.
Smart Images
Figure CN121854629A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of industrial ventilation technology, specifically a gas flow regulating device. Background Technology
[0002] In the field of industrial ventilation and flue gas treatment, especially in the production process of heavy industries such as electrolytic aluminum, electrolytic cells generate a large amount of high-temperature flue gas containing highly corrosive components such as fluorides and sulfur dioxide during operation. This flue gas must be discharged in a timely and effective manner to ensure the stability and safety of the production environment. Traditional flue gas exhaust systems usually adopt a parallel duct design, with multiple electrolytic cells sharing a main duct. However, due to the long duct and uneven resistance distribution, significant pressure differences between the near and far ends are easily caused. Some electrolytic cells have difficulty exhausting flue gas due to insufficient air pressure, which seriously affects production efficiency and environmental safety. At present, these problems mostly rely on manual on-site adjustment of valve opening, which is not only labor-intensive and has a slow response, but also has low adjustment accuracy, making it difficult to achieve real-time and precise control of flue gas flow. In existing technologies, valve devices used for gas flow regulation mostly adopt gate valve, butterfly valve, or ball valve structures. Their regulation methods are mostly segmented or limited-level regulation, which cannot achieve continuous stepless change of the flow cross section. This easily causes airflow pulsation and pressure fluctuation, which is not conducive to stable flow control. At the same time, pressure is usually balanced by manually adjusting the opening of each branch valve. However, this method relies on the operator's experience, has low adjustment accuracy, slow response, and cannot achieve real-time dynamic adjustment. In addition, the internal structure of such valves is complex, with many sudden expansion, contraction, or corner structures, which easily generate turbulence and further aggravate pressure loss and regulation inaccuracy. Under harsh working conditions such as high temperature, high dust, strong corrosion, and strong magnetic field, the material durability, sealing reliability, and structural strength of traditional valves are often insufficient, making them prone to corrosion, jamming, or leakage, resulting in decreased system reliability, frequent maintenance, and even safety accidents. Summary of the Invention
[0003] The purpose of this invention is to provide a gas flow regulating device to solve the problems of traditional valves in the prior art, such as the inability to achieve stepless and precise flow regulation, poor reliability due to the susceptibility of their structure to environmental influences, and difficulty in achieving intelligent collaborative control of multiple valves.
[0004] To achieve the above objectives, the present invention provides the following technical solution: a gas flow regulating device, comprising: a valve body, a movable groove, a connecting flange, a valve core, an elastic body, an regulating mechanism, and a detection mechanism. The valve body has movable grooves communicating with its inner cavity at both ends of its outer wall on the left and right sides along the left-right direction. There are two connecting flanges, which are respectively screwed to the left and right sides of the valve body. There are two valve cores, which are slidably and compatiblely inserted into the left and right sides of the inner cavity of the valve body. The elastic body is embedded in the inner cavity of the valve body, with its left and right sides respectively located inside the two valve cores. The regulating mechanism is located on the outer wall of the elastic body, and the detection mechanism is located on the outer wall of the regulating mechanism.
[0005] Preferably, the adjusting mechanism includes a power component, a transmission component, and an actuation component. The power component is disposed on the front side of the outer wall of the valve body, the transmission component is disposed on the outer wall of the power component, and the actuation component is disposed on the outer wall of the elastic body.
[0006] Preferably, the power assembly includes: a motor and a double-rotor T-screw, the double-rotor T-screw being screwed to the outer wall of the valve body, the detection mechanism being screwed to the input end of the double-rotor T-screw, and the motor being screwed to the input end of the detection mechanism.
[0007] Preferably, the transmission assembly includes: a threaded cylinder, a connecting block, and a guide cylinder. There are two threaded cylinders, each screwed onto the left and right sides of the outer wall of the double-helix T-shaped lead screw. The positions of the two threaded cylinders correspond to the positions of the two moving slots. The connecting block is fixedly sleeved on the outer wall of the threaded cylinder. The rear end of the connecting block slidably penetrates the inner cavity of the moving slot and extends into the inner cavity of the valve body. There are two guide cylinders, each slidably fitted and inserted into the left and right sides of the inner cavity of the valve body. The outer sides of the two guide cylinders are connected to the inner sides of the two valve cores. The rear ends of the two connecting blocks are respectively disposed on the outer walls of the two guide cylinders.
[0008] Preferably, the execution component includes: positioning blocks, connecting rods, and annular supports. The number of positioning blocks is several, and the positioning blocks are arranged in pairs to form several groups. The groups of positioning blocks are equidistantly arranged on the inner walls of two guide cylinders along the circumferential direction, and the positions of the two positioning blocks in each group correspond to each other. The number of connecting rods is several, and the outer ends of the connecting rods are rotatably arranged on the outer walls of the positioning blocks via pins. The number of annular supports is several, and the annular supports are equidistantly arranged on the middle of the outer wall of the elastic body along the circumferential direction. The inner ends of the connecting rods are rotatably arranged on the outer walls of the annular supports via pins.
[0009] Preferably, by driving the double-rotor T-shaped lead screw to rotate, the threaded cylinder causes the connecting block to slide along the inner cavity of the moving groove, thereby driving the guide cylinder to move. The movement of the guide cylinder pushes the annular bracket through the connecting rod, causing the diameter of the elastomer to change.
[0010] Preferably, the annular support can concentrate and integrate the dispersed forces transmitted by several connecting rods and convert them into radial forces that act uniformly on the circumference of the elastic body, while ensuring that the radial deformation of the elastic body is in a concentric contraction / expansion state.
[0011] Preferably, the outer wall of the valve body is further provided with a protective shell, and there are two protective shells. The two protective shells are respectively provided at the left and right ends of the front side of the outer wall of the valve body. The positions of the two protective shells correspond to the positions of the two moving grooves. The left and right ends of the double-rotor T-shaped screw can be rotatably extended into the inner cavity of the two protective shells.
[0012] Preferably, the outer wall of the valve core is provided with a sealing ring.
[0013] Preferably, the detection mechanism includes: a housing, an input shaft, a first locking pin, an output shaft, a second locking pin, a sleeve, a second locking groove, a first locking groove, a first locking block, a worm gear, a worm, a threaded sleeve, a support plate, a pressure sensor, a pressure plate, a first spring, a compression groove, a pull rod, a second locking block, and a second spring. The front side of the housing is connected to the rear end of the motor by screws, and the rear side of the housing is connected to the outer side of the double-rotor T-shaped lead screw by screws. Compression grooves communicating with their inner cavities are provided on the front side of the middle of both the left and right sides of the housing. An observation window is provided on the right side of the housing, and a scale line is provided on the right side of the housing, the position of which corresponds to the position of the observation window. The outer wall of the input shaft is rotatably mounted on the front side of the housing via bearings. The front end is locked to the output end of the motor via a coupling. The first locking pin is located on the rear side of the top of the outer wall of the input shaft. The outer wall of the output shaft is rotatably mounted on the rear side of the housing via a bearing. The rear end of the output shaft is locked to the input end of the double-rotor T-screw via a coupling. The second locking pin is located on the front side of the top of the outer wall of the output shaft. The sleeve is slidably fitted into the outer wall of the output shaft. The rear side of the outer wall of the input shaft is slidably fitted into the front side of the inner cavity of the sleeve. The rear side of the top of the outer wall of the sleeve has a second locking groove communicating with its inner cavity along the front-rear direction. The front end of the sleeve has several first locking grooves equidistantly spaced along the circumferential direction. The second locking pin is slidably fitted into the rear side of the inner cavity of the second locking groove. The first locking pin is fitted into the first locking groove. Within the inner cavity of the first slot corresponding to its current position, the first locking block is disposed on the front side of the outer wall of the sleeve. The worm gear is rotatably sleeved on the rear side of the outer wall of the output shaft via a bearing. The worm gear is located within the inner cavity of the housing. The worm is rotatably disposed on the left rear end of the housing via a bearing. The right end of the worm extends rotatably into the inner cavity of the housing. The worm and the worm gear mesh. The threaded sleeve is rotatably sleeved on the rear side of the outer wall of the output shaft via a bearing. The threaded sleeve is disposed on the front side of the worm gear. The distance between the front side and the rear side of the threaded sleeve is greater than the length of the second slot. The support plate is screwed to the outer wall of the threaded sleeve. The upper and lower sides of the support plate are in contact with the upper and lower sides of the inner cavity of the housing, respectively. The pressure sensor is fixedly sleeved on... At the center of the outer wall of the support plate, the pressure plate is slidably fitted to the front side of the outer wall of the support plate. The rear side of the pressure plate contacts the front side of the pressure sensor. The first spring is sleeved on the outer wall of the threaded sleeve, with one end of the first spring engaged with the front side of the pressure plate and the other end engaged with the rear side of the sleeve. There are two pull rods, each slidably fitted into the inner cavity of one of the two extrusion grooves. The outer ends of the pull rods slidably extend out of the outer wall of the housing. The second locking block is located at the inner end of the pull rod, slidably fitted into the inner cavity of the extrusion groove, and its inner end slidably extends into the inner cavity of the housing. The positions of the second locking block and the first locking block correspond to and match each other.The second spring is sleeved on the outer wall of the pull rod, one end of the second spring is engaged with the inner wall of the compression groove, and the other end of the second spring is engaged with the outer wall of the second locking block.
[0014] The gas flow regulating device proposed in this invention has the following advantages:
[0015] 1. This invention achieves continuous stepless adjustment of the flow cross-sectional area of flue gas ducts through a unique mechanical linkage and elastic deformation structure. First, after the valve body is connected to the pipe flange, the double-rotor T-shaped screw drives the threaded cylinder to move synchronously with the guide cylinder and valve core by manually or jogging the motor. This, in turn, drives the elastic body to undergo elastic deformation, thereby completing the calibration of the minimum and maximum flow diameters and the electronic limit setting. This ensures that the valve has the ability to continuously adjust throughout the entire range, and precise position control can be achieved through encoder feedback, avoiding the airflow pulsation problem caused by the segmented adjustment of traditional valves.
[0016] 2. This invention uses a PID control module to drive a motor to precisely adjust the inner diameter of the elastic body based on the real-time signal from the pressure sensor, thereby achieving dynamic and continuous control of the gas flow rate. During this process, pressure fluctuations can be quickly responded to and stabilized to the set value, which greatly improves the adjustment accuracy and response speed. It overcomes the problems of lag and low accuracy in traditional manual adjustment, and is especially suitable for industrial scenarios with frequent fluctuations in operating conditions, such as electrolytic cells.
[0017] 3. This invention connects multiple valve bodies to the same PLC system, and the host computer coordinates the opening of each valve to achieve multi-valve coordinated adjustment and system pressure balance. This effectively solves the problem of uneven smoke exhaust caused by pressure difference in parallel air ducts, significantly improves the stability and efficiency of the overall smoke exhaust system, reduces the burden of manual intervention, and meets the requirements of automated and intelligent production.
[0018] 4. This device integrates mechanical transmission, elastic deformation and intelligent control to achieve continuous, precise and rapid automatic adjustment of flue gas flow. It also has the advantages of multi-valve coordination, strong environmental adaptability and high reliability. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the valve body; Figure 3 This is an exploded view of the present invention; Figure 4 for Figure 2 Enlarged view of point A; Figure 5 for Figure 3 Enlarged view of point B; Figure 6 for Figure 3 Enlarged view of point C; Figure 7 This is a schematic diagram of the mechanism inside the outer shell cavity; Figure 8 Exploded view of the testing agency; Figure 9 for Figure 7 Enlarged view of point D; Figure 10 for Figure 8 Enlarged view of point E; Figure 11 for Figure 8 Enlarged view of point F.
[0020] In the diagram: 1. Valve body; 2. Moving groove; 3. Connecting flange; 4. Valve core; 5. Elastomer; 6. Adjusting mechanism; 61. Motor; 62. Double-rotor T-type lead screw; 63. Threaded cylinder; 64. Connecting block; 65. Guide cylinder; 66. Positioning block; 67. Connecting rod; 68. Annular bracket; 69. Protective shell; 7. Detection mechanism; 71. Outer shell; 72. Input shaft; 73. First locking pin; 74. Output shaft; 75. Second locking pin; 76. Sleeve; 77. Second locking groove; 78. First locking groove; 79. First locking block; 710. Worm gear; 711. Worm; 712. Threaded sleeve; 713. Support plate; 714. Pressure sensor; 715. Pressure plate; 716. First spring; 717. Extrusion groove; 718. Pull rod; 719. Second locking block; 720. Second spring. Detailed Implementation
[0021] 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.
[0022] Please see Figures 1-11This invention provides a gas flow regulating device, comprising: a valve body 1, a moving groove 2, a connecting flange 3, a valve core 4, an elastic body 5, an regulating mechanism 6, and a detection mechanism 7. The valve body 1 has moving grooves 2 at both ends of its outer wall, communicating with its internal cavity along the left-right direction. The valve body 1 is the main structure of the device, used to support and accommodate all internal components, forming a gas flow channel inside. There are two connecting flanges 3, which are screwed to the left and right sides of the valve body 1 respectively. The connecting flanges 3 are existing technology and will not be described in detail here. The connecting flanges 3 are used for quick connection and sealing with external piping systems. The screw connection method facilitates installation and disassembly, ensuring airtightness and mechanical strength at the interface, and adapting to system integration and maintenance needs. There are two valve cores 4, which are slidably matched. The valve core 4 is inserted into the inner cavity of the valve body 1 on the left and right sides. The outer wall of the valve core 4 is provided with a sealing rubber ring. The sliding mechanism 6 controls the expansion and contraction of the elastic body 5 to achieve continuous change of the flow channel cross section. The elastic body 5 is embedded in the inner cavity of the valve body 1. The left and right sides of the elastic body 5 are respectively set on the inner side of the two valve cores 4. Under the action of the adjustment mechanism 6, the elastic body 5 can achieve radial expansion and contraction, thereby steplessly adjusting the diameter of the flow cross section, ensuring smooth airflow transition, reducing turbulence and pressure loss. The adjustment mechanism 6 is set on the outer wall of the elastic body 5. The adjustment mechanism 6 is used to receive control signals and drive the elastic body 5 to achieve precise deformation, thereby adjusting the gas flow rate. It is the core functional module for realizing automatic control and remote operation. The detection mechanism 7 is set on the outer wall of the adjustment mechanism 6. The adjustment mechanism 6 is used to detect the torque of the motor 61 rotation, thereby preventing the motor 61 from being damaged due to overload.
[0023] As a preferred embodiment, the regulating mechanism 6 further includes a power component, a transmission component, and an actuator component. The power component is located on the front side of the outer wall of the valve body 1. The power component is the energy source of the regulating mechanism 6, responsible for converting electrical signals into mechanical rotational motion, and achieving stable output of driving force through precise PID control, ensuring the response speed and positioning accuracy of valve opening adjustment. The transmission component is located on the outer wall of the power component and is used for smooth and symmetrical transmission of force. The actuator component is located on the outer wall of the elastic body 5. The actuator component can convert the linear displacement output by the transmission component into a radial force acting uniformly on the circumference of the elastic body 5, thereby driving the elastic body 5 to achieve smooth and controllable diameter change, and finally completing the precise and stepless adjustment of the gas flow section.
[0024] More specifically, the power assembly includes: a motor 61, a double-rotor T-screw 62, and a protective housing 69. The double-rotor T-screw 62 is screwed to the outer wall of the valve body 1, and the detection mechanism 7 is screwed to the input end of the double-rotor T-screw 62. The double-rotor T-screw 62 is existing technology and will not be described in detail here. The double-rotor T-screw 62 can convert the rotational motion of the motor 61 into symmetrical and synchronous linear displacement, and is the key transmission shaft for realizing the opposing motion and stepless adjustment of the valve core 4. The motor 61 is screwed to the input end of the detection mechanism 7. The motor 61 is existing technology and is a geared motor with a PID module. The motor 61 is the power source of the entire adjustment system, receiving power from the control... The electrical signal of the control system outputs precise rotational torque to drive the subsequent transmission system. It is the core actuator for achieving automatic adjustment. There are two protective shells 69, which are respectively set on the left and right ends of the front side of the outer wall of the valve body 1. The positions of the two protective shells 69 correspond to the positions of the two moving slots 2. The left and right ends of the double-rotor T-shaped screw 62 can be rotatably extended into the inner cavity of the two protective shells 69. The protective shells 69 are used to accommodate and protect the overhanging parts at both ends of the double-rotor T-shaped screw 62. Its internal space provides stable rotational support for the double-rotor T-shaped screw 62, while isolating external dust, corrosive gases and mechanical collisions, ensuring long-term reliable operation of the transmission system in harsh environments.
[0025] More specifically, the transmission assembly includes: threaded cylinders 63, connecting blocks 64, and guide cylinders 65. There are two threaded cylinders 63, each screwed onto the left and right sides of the outer wall of the double-rotor T-screw 62. The positions of the two threaded cylinders 63 correspond to the positions of the two moving slots 2. The threaded cylinders 63 can directly convert the rotational motion of the double-rotor T-screw 62 into their own linear motion. The symmetrical and synchronous reverse movement of the two threaded cylinders 63 on the left and right sides of the double-rotor T-screw 62 is the basic mechanical structure for achieving precise directional adjustment of the valve core 4. The connecting block 64 is fixedly sleeved on the outer wall of the threaded cylinders 63. The rear end of the connecting block 64 slidably penetrates the inner cavity of the moving slot 2 and extends... The connecting block 64 is a key connecting component that transmits power from the outside to the inside of the valve body 1. It also serves as a guide to ensure that the linear motion of the threaded cylinder 63 can be accurately and stably transmitted to the internal actuator. There are two guide cylinders 65, which are slidably fitted and inserted into the left and right sides of the inner cavity of the valve body 1. The outer sides of the two guide cylinders 65 are connected to the inner sides of the two valve cores 4 respectively. The rear ends of the two connecting blocks 64 are respectively set on the outer walls of the two guide cylinders 65. The guide cylinders 65 are used to receive the linear driving force from the connecting blocks 64 and guide the valve cores 4 to slide smoothly along the axial direction, ensuring the coaxiality and stability of the movement process. It is the direct execution carrier for realizing flow regulation.
[0026] More specifically, the actuating components include: positioning blocks 66, connecting rods 67, and annular supports 68. There are several positioning blocks 66, arranged in pairs to form several groups. These groups of positioning blocks 66 are equidistantly positioned circumferentially on the inner walls of two guide cylinders 65, with the positions of the two positioning blocks 66 in each group corresponding. The positioning blocks 66 serve as fixed fulcrums for the connecting rods 67, converting the linear motion of the guide cylinders 65 into the oscillation of the connecting rods 67. Their evenly distributed design ensures that the driving force acts uniformly and synchronously on the circumference of the elastic body 5. There are also several connecting rods 67, the outer ends of which are rotatably mounted on the outer walls of the positioning blocks 66 via pins. The connecting rods 67 can convert the axial displacement of the guide cylinders 65 into the annular support... The radial displacement of 68, through its lever action, realizes the conversion of motion form and the transmission of force. There are several annular supports 68, which are equidistantly arranged in the middle of the outer wall of the elastic body 5 along the circumference. The inner ends of several sets of connecting rods 67 are rotatably set on the outer wall of the several annular supports 68 through pins. The annular supports 68 can concentrate and integrate the dispersed forces transmitted by the several connecting rods 67 and convert them into radial forces that act uniformly on the circumference of the elastic body 5. This avoids uneven deformation or damage caused by excessive local stress on the elastic body. At the same time, it ensures that the radial deformation of the elastic body 5 is in a concentric circle contraction / expansion state, ensuring the regularity of the flow section and driving the elastic body 5 to undergo controllable radial deformation, thereby realizing continuous and linear adjustment of the flow section.
[0027] More specifically, the detection mechanism 7 includes: a housing 71, an input shaft 72, a first locking pin 73, an output shaft 74, a second locking pin 75, a sleeve 76, a second locking groove 77, a first locking groove 78, a first locking block 79, a worm gear 710, a worm 711, a threaded sleeve 712, a support plate 713, a pressure sensor 714, a pressure plate 715, a first spring 716, a pressing groove 717, a pull rod 718, a second locking block 719, and a second spring 720. The front side of the housing 71 is connected to the rear end of the motor 61 by screws, and the rear side of the housing 71 is connected to the outside of the double-rotor T-shaped lead screw 62 by screws. The left and right sides of the housing 71 each have a pressing groove 717 communicating with their inner cavity at the front center. An observation window is provided on the right side of the housing 71. A scale line is provided on the right side, and the position of the scale line corresponds to the position of the observation window. The outer shell 71 is the rigid base and sealed container of the entire detection mechanism 7, providing precise installation positioning and motion constraints for all internal components, and isolating external dust, moisture and other interference. The observation window and scale line are used to visually monitor the axial displacement of the sleeve 76, providing an intuitive mechanical indication for roughly judging the load status. The outer wall of the input shaft 72 is rotatably set on the front side of the outer shell 71 through a bearing. The front end of the input shaft 72 is locked to the output end of the motor 61 through a coupling. The input shaft 72 is the power input interface, introducing the rotational motion and torque of the motor 61 into the detection mechanism 7 without loss. The first locking post 73 is set on the rear side of the top of the outer wall of the input shaft 72. Used to transmit torque, and interacting axially with the sidewall of the first slot 78, converting the magnitude of the load torque into an axial thrust on the sleeve 76. The outer wall of the output shaft 74 is rotatably mounted on the rear side of the housing 71 via bearings. The rear end of the output shaft 74 is locked to the input end of the double-rotor T-screw 62 via a coupling. The output shaft 74 is a power output interface, transmitting the detected and processed rotational motion to the double-rotor T-screw 62. The second locking pin 75 is located on the front side of the top of the outer wall of the output shaft 74. The second locking pin 75 allows the sleeve 76 to slide axially while ensuring reliable transmission of circumferential torque and bearing the reverse torque from the load. The sleeve 76 is slidably fitted to the outer wall of the output shaft 74, and the rear side of the outer wall of the input shaft 72 is slidably fitted to the sleeve 76. The sleeve 76 is fitted into the front side of the inner cavity. A second slot 77, communicating with the inner cavity, is formed on the rear side of the top of the outer wall of the sleeve 76 along the front-rear direction. Several first slots 78 are equidistantly formed on the front end of the sleeve 76 along the circumferential direction. A second locking pin 75 is slidably fitted into the rear side of the inner cavity of the second slot 77. A first locking pin 73 is fitted into the inner cavity of the first slot 78 corresponding to its current position. The sleeve 76 is the core sensing and force conversion carrier of the entire mechanism, used for torque transmission. A first locking block 79 is located on the front side of the outer wall of the sleeve 76. When the sleeve 76 moves backward to a critical position due to overload, the first locking block 79 pushes the second locking block 719 for mechanical locking. The worm gear 710 is rotatably fitted onto the rear side of the outer wall of the output shaft 74 via a bearing.The worm gear 710 is located inside the housing 71. The worm 711 is rotatably mounted on the left rear end of the housing 71 via a bearing. The right end of the worm 711 extends rotatably into the housing 71. The worm 711 and the worm gear 710 mesh with each other. The worm 711 and the worm gear 710 can precisely and effortlessly adjust the axial position of the threaded sleeve 712, thereby setting the preload of the first spring 716, i.e., calibrating the torque protection threshold. The self-locking property of the worm gear 710 and the worm 711 prevents the set value from changing on its own under vibration. The threaded sleeve 712 is rotatably sleeved on the rear side of the outer wall of the output shaft 74 via a bearing. The threaded sleeve 712 is located on the front side of the worm gear 710. The distance between the front side of the threaded sleeve 712 and the rear side of the sleeve 716 is greater than the second slot 77. The length of the threaded sleeve 712 is the actuator for threshold adjustment. Its rotation is converted into linear motion of the support plate 713. The support plate 713 is screwed to the outer wall of the threaded sleeve 712. The upper and lower sides of the support plate 713 are in contact with the upper and lower sides of the inner cavity of the outer shell 71, respectively. The support plate 713 is the mounting base for the pressure sensor 714 and the pressure plate 715, as well as the position adjustment slider. The pressure sensor 714 is fixedly sleeved in the middle of the outer wall of the support plate 713. The pressure sensor 714 is existing technology and will not be described in detail here. The pressure sensor 714 is a torque quantification electronic sensing unit that converts the pressure signal transmitted from the first spring 716 into an electrical signal, realizing real-time monitoring, display and transmission of torque, and providing data basis for the control system to judge the degree of scaling. The plate 715 is slidably fitted onto the front side of the outer wall of the support plate 713. The rear side of the pressure plate 715 contacts the front side of the pressure sensor 714. The pressure plate 715 is a force distribution and transmission component, ensuring that the thrust of the first spring 716 is evenly applied to the sensitive area of the pressure sensor 714. The first spring 716 is sleeved on the outer wall of the threaded sleeve 712. One end of the first spring 716 is engaged with the front side of the pressure plate 715, and the other end is engaged with the rear side of the sleeve 716. The first spring 716 is a rotary spring, which undergoes elastic deformation after being compressed or stretched by external force, and returns to its initial state after the external force is removed. The first spring 716 is a force sensing and buffering element, used to provide a preset counterforce, linearly converting the displacement of the sleeve 76 into pressure, and... Furthermore, after tripping, it provides a reset driving force for the sleeve 76. There are two pull rods 718, each slidably and compatiblely inserted into the inner cavity of one of the two pressing grooves 717. The outer end of each pull rod 718 slidably extends out of the outer wall of the housing 71. A second locking block 719 is located at the inner end of each pull rod 718, slidably and compatiblely inserted into the inner cavity of the pressing groove 717. The inner end of the second locking block 719 slidably extends into the inner cavity of the housing 71. The position of the second locking block 719 corresponds to and matches the position of the first locking block 79. The second locking block 719 is a key actuator of the tripping locking mechanism. Normally, it is located on the movement path of the first locking block 79. During tripping, it is pushed open by the first locking block 79, and after the first locking block 79 passes its position...The second spring 720 rebounds under its action, and the mechanical locking sleeve 76 prevents impact caused by automatic reset. The second spring 720 is sleeved on the outer wall of the pull rod 718. One end of the second spring 720 is engaged with the inner wall of the compression groove 717, and the other end is engaged with the outer wall of the second locking block 719. The second spring 720 is a rotary spring, which undergoes elastic deformation after being compressed or stretched by external force, and returns to its initial state after the external force is removed. The second spring 720 is used to provide the rebound and reset force for the second locking block 719, ensuring that the sleeve 76 can be reliably locked after disengagement.
[0028] Its detailed connection method is a well-known technology in this field. The following mainly introduces the working principle and process, and the specific work is as follows.
[0029] Step 1: When using, connect the valve body 1 to the flue gas pipe of the electrolytic cell through the connecting flanges 3 on both sides, ensure that the flange gasket is intact and the screws are tightened evenly, and at the same time ensure that the installation direction of the valve body 1 is consistent with the airflow direction. Connect the motor 61 and the PID control module to the control cabinet and connect the power supply and signal. Step 2: Manually or jog the motor 61. The motor 61 drives the double-rotor T-screw 62 to rotate. The rotation of the double-rotor T-screw 62 drives the two threaded cylinders 63 to move the two connecting blocks 64 synchronously inward along the inner cavity of the two moving grooves 2. Thus, the connecting blocks 64 can drive the two guide cylinders 65 to move synchronously inward. In turn, the two guide cylinders 65 can drive the two valve cores 4 and the positioning block 66 to move synchronously inward. The inward movement of the positioning block 66 can drive the connecting rod 67 to push the annular bracket 68 to move inward. The movable annular support 68 can push the middle part of the elastic body 5 to be recessed inward, causing the elastic body 5 to undergo elastic deformation, thereby reducing the diameter of the middle part of the inner cavity of the elastic body 5 until the outer wall of the connecting block 64 contacts the inner side of the inner cavity of the moving groove 2. At this time, the inner diameter of the elastic body 5 is the smallest. Record the reading of the motor encoder or position sensor at this time and set it as the minimum overcurrent diameter position. Drive the motor 61 in reverse to make the inner diameter of the elastic body 5 the largest. Record the position reading at this time and set it as the maximum overcurrent diameter position. Set these two positions as the electronic limit positions of the PID control module to prevent mechanical overload. Step 3: Set the target pressure value in the PID control module. Based on the actual gas characteristics (temperature, density, corrosivity), initially set the PID parameters. Perform an open-loop test to observe the response speed and stability of valve body 1. Connect the pressure sensor signal from the air duct to the PID module to test whether the remote control signal can normally drive motor 61 and provide a position signal. The PID module receives the remote pressure setpoint, motor 61 starts, and the output of motor 61 drives the input shaft 72 to rotate. The rotation of the input shaft 72 drives the first locking pin 73 to rotate. The rotation of the first locking pin 73, in conjunction with the first locking slot 78, drives the sleeve 76 to rotate. The rotation of the sleeve 76 can utilize the second locking slot 77 and the second locking pin 75... The interaction between the components drives the output shaft 74 to rotate, which in turn drives the double-rotor T-shaped lead screw 62 to rotate. This causes the threaded cylinder 63 to slide along the inner cavity of the moving groove 2, thereby moving the guide cylinder 65. The movement of the guide cylinder 65 can push the annular bracket 68 through the connecting rod 67, causing the diameter of the elastic body 5 to change. This adjusts the flow section inside the valve body, changes the gas flow rate, and gradually brings the system pressure closer to the set value. The PID module feeds back the real-time position signal to the host computer, connecting multiple valve bodies 1 to the same PLC system. The PLC calculates the target opening of each valve based on the pressure sensor data of each electrolytic cell and sends instructions to the PID module of each valve to achieve autonomous and coordinated adjustment of multiple valves and balance the system pressure. Step 4: As this device is used, when high-temperature flue gas containing highly corrosive acidic gases such as hydrogen fluoride and sulfur dioxide, as well as alumina and electrolyte dust, continuously flows through the inner cavity of the elastomer 5, the flue gas temperature will drop below the acid dew point in the pipes and within the device. The acidic gases will condense on the inner wall of the elastomer 5, forming an acidic liquid film. This liquid film acts like glue, capturing and adhering to solid dust particles in the flue gas. Over time, as the device remains at a certain opening, the adhered material, under repeated wet-dry cycles and chemical action, will gradually solidify and harden, forming a hard layer of mixed inorganic salts and dust. This layer not only alters the smoothness of the flow channel but also firmly adheres to the inner wall of the elastomer 5, essentially becoming part of the elastomer 5's structure. When the elastomer... After a hard scale layer forms on the inner wall of the elastomer 5, the scale layer significantly increases the structural stiffness of the elastomer 5 during radial deformation. When the motor 61 drives the elastomer 5 to contract or expand, it needs to overcome not only the flexibility and resistance of the elastomer itself, but also the enormous force required for the hard scale layer to bend and crack. This directly leads to a sharp increase in the system load torque, causing a significant increase in the operating current of the motor 61. Long-term operation may lead to overheating, insulation aging, or even burnout of the motor 61. In extreme cases, if the scale layer is exceptionally hard, the motor 61 may encounter a stall during startup or adjustment, generating a stall current several times the rated value, causing instantaneous fatal damage to the motor 61. At the same time, in order to overcome the increased friction and load, the double-rotor T-type lead screw 62, threaded cylinder 63, and connecting rod 67, etc. Increased wear and shortened lifespan lead to slower response speed and decreased positioning accuracy of the entire regulating system, potentially even causing complete failure due to mechanical jamming. Therefore, internal scaling is not only an obstacle to flow regulation but also a serious threat to the reliability and lifespan of the entire valve actuator. To prevent damage to the motor 61, double-rotor T-screw 62, threaded sleeve 63, and connecting rod 67 caused by scaling and dust buildup on the inner wall of the elastomer 5, the deformation of the first spring 716 is adjusted according to the parameters of the motor 61 before use. Rotating the worm gear 711 drives the worm wheel 710 to rotate the threaded sleeve 712. The rotational force generated by the threaded sleeve 712 causes the support plate 713 to move along the threaded sleeve 712. The outer wall moves back and forth, thereby adjusting the elastic deformation and compression degree of the first spring 716. The position of the support plate 713 can be monitored in real time through the observation window and scale lines on the right side of the outer casing 71 until it is adjusted to the appropriate position. When the inner diameter of the elastic body 5 is adjusted using the motor 61, the output end of the motor 61 drives the input shaft 72 to rotate. When the scaling, dust accumulation, or other phenomena on the inner wall of the elastic body 5 are minor, and the load torque of the motor 61 is less than its maximum withstand torque, the output end of the motor 61 drives the input shaft 72 to rotate. The rotation of the input shaft 72 drives the first locking pin 73 to rotate. The rotation of the first locking pin 73, in conjunction with the first locking groove 78, drives the sleeve 76 to rotate.The rotation of sleeve 76 can drive the output shaft 74 to rotate through the engagement between the second slot 77 and the second locking pin 75. This output shaft 74 then drives the double-rotating T-screw 62 to rotate, thereby adjusting the inner diameter of the elastomer 5. Because the inner wall of the elastomer 5 has a layer of scale or dust, the load torque of motor 61 is greater when adjusting the inner diameter of the elastomer 5 compared to when there is no scale or dust on the inner wall. Therefore, when the sleeve 76 is rotated by the engagement between the first locking pin 73 and the first slot 78, the first locking pin 73 will press against the inner wall of the first slot 78, thus pushing the sleeve 76 to the rear. Since the load torque of motor 61 is less than its maximum withstand torque at this time, the first… The locking pin 73 will not completely disengage from the inner cavity of the first locking groove 78. When the first locking pin 73 and the first locking groove 78 push the sleeve 76 backward, the sleeve 76 will compress the first spring 716 to increase elastic deformation. Thus, the first spring 716 can push the pressure plate 715 to compress the pressure sensor 714. The pressure value displayed by the pressure sensor 714 can be converted and calculated to roughly estimate the scaling situation in the exhaust pipe at this state. The more severe the scaling, the higher the value displayed by the pressure sensor 714. Furthermore, by comprehensively judging the multiple pressure values generated by the pressure sensor 714 when the inner diameter of the elastic body 5 is adjusted multiple times, the overall scaling situation in the exhaust pipe can be determined. When the scaling situation in the inner wall of the elastic body 5 is relatively severe... When the load torque of motor 61 is greater than or equal to its maximum withstand torque, the output end of motor 61 drives the input shaft 72 to rotate, thereby driving the first locking pin 73 to rotate. Since the load torque is greater than or equal to the maximum withstand torque of motor 61, the rotating first locking pin 73 will press against the inner wall of the first locking groove 78, thereby pushing the sleeve 76 to move backward. This causes the second locking pin 75 to move forward into the inner cavity of the second locking groove 77, compressing the first spring 716 and increasing the elastic deformation of the first spring 716. As the sleeve 76 moves backward, the first locking block 79 will push the second locking block 719 to move outward, thereby driving the pull rod 718 backward. The first locking pin 73 is completely disengaged from the inner cavity of the first locking slot 78. At this time, the first locking block 79 moves to the rear side of the second locking block 719. Under the elastic force of the second spring 720, the pull rod 718 and the second locking block 719 can be pushed back to their initial positions. Thus, the position of the sleeve 76 can be fixed by the cooperation between the second locking block 719 and the first locking block 79, thereby causing the input shaft 72 and the sleeve 76 to separate and the motor 61 to idle. This can prevent damage to the motor 61 due to excessive load. After the scale layer on the inner wall of the elastic body 5 is removed, the two pull rods 718 are pulled outwards simultaneously, which can drive the second locking block 719 to move outwards.Then, under the elastic force of the first spring 716, the sleeve 76 can be pushed forward, causing the first locking pin 73 to move back into the inner cavity of the first locking slot 78.
[0030] In summary, this device achieves continuous, precise, and rapid automatic adjustment of flue gas flow by integrating mechanical transmission, elastic deformation, and intelligent control. It also has advantages such as multi-valve coordination, strong environmental adaptability, and high reliability.
[0031] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A gas flow regulating device, characterized in that, include: The valve body (1) has movable grooves (2) that communicate with its inner cavity at both ends of the front side of the outer wall of the valve body (1) along the left and right directions. Two connecting flanges (3) are provided, and the two connecting flanges (3) are respectively screwed to the left and right sides of the valve body (1); Valve core (4), there are two valve cores (4), and the two valve cores (4) are slidably and compatiblely inserted into the left and right sides of the inner cavity of the valve body (1); The elastic body (5) is embedded in the inner cavity of the valve body (1), and the left and right sides of the elastic body (5) are respectively disposed on the inner sides of the two valve cores (4); Adjustment mechanism (6), said adjustment mechanism (6) is disposed on the outer wall of the elastic body (5); The detection mechanism (7) is disposed on the outer wall of the adjustment mechanism (6); The adjustment mechanism (6) includes: A power assembly is disposed on the front side of the outer wall of the valve body (1); A transmission assembly, wherein the transmission assembly is disposed on the outer wall of the power assembly; An execution component is disposed on the outer wall of the elastomer (5).
2. The gas flow regulating device according to claim 1, characterized in that, The power assembly includes: A double-rotor T-shaped lead screw (62) is screwed to the outer wall of the valve body (1), and the detection mechanism (7) is screwed to the input end of the double-rotor T-shaped lead screw (62); The motor (61) is screwed to the input end of the detection mechanism (7).
3. The gas flow regulating device according to claim 2, characterized in that, The transmission assembly includes: Two threaded cylinders (63) are screwed to the left and right sides of the outer wall of the double-rotor T-shaped screw (62), respectively. The positions of the two threaded cylinders (63) correspond to the positions of the two moving slots (2). Connecting block (64), the connecting block (64) is fixedly sleeved on the outer wall of the threaded cylinder (63), the rear end of the connecting block (64) can slide through the inner cavity of the moving groove (2) and extend into the inner cavity of the valve body (1); The guide cylinder (65) has two components. The two guide cylinders (65) are slidably fitted and inserted into the left and right sides of the inner cavity of the valve body (1). The outer sides of the two guide cylinders (65) are respectively connected to the inner sides of the two valve cores (4). The rear ends of the two connecting blocks (64) are respectively set on the outer walls of the two guide cylinders (65).
4. The gas flow regulating device according to claim 3, characterized in that, The execution component includes: Positioning blocks (66), the number of positioning blocks (66) is several, the positioning blocks (66) are in pairs and divided into several groups, the positioning blocks (66) of the several groups are respectively arranged equidistantly along the circumference on the inner wall of the two guide cylinders (65), and the positions of the two positioning blocks (66) in each group are corresponding. Linkage (67), the number of linkages (67) is several, and the outer ends of several linkages (67) are respectively rotatably set on the outer wall of several positioning blocks (66) by means of pins; The ring bracket (68) is a plurality of ring brackets (68), which are equidistantly arranged in the middle of the outer wall of the elastic body (5) along the circumference. The inner ends of the plurality of connecting rods (67) are rotatably arranged on the outer wall of the plurality of ring brackets (68) through pins.
5. A gas flow regulating device according to claim 4, characterized in that, By driving the double-rotor T-shaped lead screw (62) to rotate, the threaded cylinder (63) causes the connecting block (64) to slide along the inner cavity of the moving groove (2), thereby driving the guide cylinder (65) to move. The movement of the guide cylinder (65) pushes the annular bracket (68) through the connecting rod (67), causing the diameter of the elastic body (5) to change.
6. A gas flow regulating device according to claim 5, characterized in that, The ring support (68) can concentrate and integrate the dispersed forces transmitted by several connecting rods (67) and convert them into radial forces that act uniformly on the circumference of the elastic body (5), while ensuring that the radial deformation of the elastic body (5) is in a concentric circle contraction / expansion state.
7. A gas flow regulating device according to claim 6, characterized in that, The outer wall of the valve body (1) is also provided with a protective shell (69). There are two protective shells (69). The two protective shells (69) are respectively located at the left and right ends of the front side of the outer wall of the valve body (1). The positions of the two protective shells (69) correspond to the positions of the two moving grooves (2). The left and right ends of the double-rotor T-shaped screw (62) can be rotatably extended into the inner cavity of the two protective shells (69).
8. A gas flow regulating device according to claim 7, characterized in that, The outer wall of the valve core (4) is provided with a sealing ring.
9. A gas flow regulating device according to claim 8, characterized in that, The testing organization (7) includes: The outer casing (71) is connected to the rear end of the motor (61) by screws on the front side and to the outer side of the double-rotor T-shaped lead screw (62) by screws on the rear side. The outer casing (71) has extrusion grooves (717) that communicate with its inner cavity on the front side of the middle of the left and right sides. The outer casing (71) has an observation window on the right side and a scale line on the right side. The position of the scale line corresponds to the position of the observation window. The input shaft (72) is rotatably mounted on the front side of the housing (71) via a bearing. The front end of the input shaft (72) is locked to the output end of the motor (61) via a coupling. The first locking post (73) is located on the rear side of the top of the outer wall of the input shaft (72); Output shaft (74), the outer wall of the output shaft (74) is rotatably disposed on the rear side of the housing (71) by bearing, and the rear end of the output shaft (74) is locked to the input end of the double-rotor T-type lead screw (62) by a coupling; The second locking post (75) is located on the front side of the top of the outer wall of the output shaft (74); A sleeve (76) is slidably and appropriately fitted to the outer wall of the output shaft (74). The rear side of the outer wall of the input shaft (72) is slidably and appropriately fitted to the front side of the inner cavity of the sleeve (76). A second slot (77) communicating with its inner cavity is opened on the rear side of the top end of the outer wall of the sleeve (76) along the front-back direction. A plurality of first slots (78) are opened at equal intervals along the circumference at the front end of the sleeve (76). The second locking post (75) is slidably and appropriately fitted to the rear side of the inner cavity of the second slot (77). The first locking post (73) is appropriately fitted to the inner cavity of the first slot (78) corresponding to its current position. The first locking block (79) is disposed on the front side of the outer wall of the sleeve (76); Worm gear (710), the worm gear (710) is rotatably sleeved on the rear side of the outer wall of the output shaft (74) via a bearing, the worm gear (710) is located in the inner cavity of the housing (71); A worm (711) is rotatably disposed on the left rear end of the housing (71) via a bearing, and the right end of the worm (711) extends rotatably into the inner cavity of the housing (71). The worm (711) meshes with a worm wheel (710). A threaded sleeve (712) is rotatably sleeved on the rear side of the outer wall of the output shaft (74) via a bearing. The threaded sleeve (712) is located on the front side of the worm gear (710). The distance between the front side of the threaded sleeve (712) and the rear side of the sleeve (76) is greater than the length of the second slot (77). Support plate (713), the support plate (713) is screwed to the outer wall of the threaded sleeve (712), and the upper and lower sides of the support plate (713) are in contact with the upper and lower sides of the inner cavity of the outer shell (71), respectively. Pressure sensor (714), the pressure sensor (714) is fixedly sleeved on the middle of the outer wall of the support plate (713); A pressure plate (715) is slidably fitted to the front side of the outer wall of the support plate (713), and the rear side of the pressure plate (715) is in contact with the front side of the pressure sensor (714). The first spring (716) is sleeved on the outer wall of the threaded sleeve (712), one end of the first spring (716) is engaged with the front side of the pressure plate (715), and the other end of the first spring (716) is engaged with the rear side of the sleeve (76). Pull rod (718), there are two pull rods (718), the two pull rods (718) are slidably adapted to be inserted into the inner cavity of two extrusion grooves (717), and the outer end of the pull rod (718) extends slidably out of the outer wall of the outer shell (71); The second locking block (719) is disposed at the inner end of the pull rod (718). The second locking block (719) is slidably adapted to be inserted into the inner cavity of the pressing groove (717). The inner end of the second locking block (719) is slidably extended into the inner cavity of the outer shell (71). The position of the second locking block (719) corresponds to and matches the position of the first locking block (79). The second spring (720) is sleeved on the outer wall of the pull rod (718), one end of the second spring (720) is engaged with the inner wall of the extrusion groove (717), and the other end of the second spring (720) is engaged with the outer wall of the second locking block (719).