A restoring device for a hood in a lime kiln

Abstract

The present application relates to lime kiln hood technical field, especially to a kind of lime kiln in-kiln hood recovery device, including annular air guide frame, elastic telescopic cover, air guide cylinder, laminated side cover, guide rod, lifting frame, wind wheel and spline shaft, annular air guide frame top center is equipped with outlet, outlet is fixed with multiple guide rods, guide rod is slidably connected with lifting frame between, lifting frame outside is connected with air guide cylinder, air guide cylinder bottom rim is connected with elastic telescopic cover between annular air guide frame outlet outer circumferential edge, air guide cylinder is communicated with annular air guide frame outlet, air guide cylinder outside is connected with laminated side cover, laminated side cover is equipped with air outlet in upper side. Wind wheel driven by airflow drives eccentric wheel to rotate, generates periodic excitation force, is transmitted to air guide cylinder and laminated side cover by spline shaft, lifting frame, makes it high-frequency shake, effectively shakes off dust and scale adhered in air duct inner wall, keeps air outlet unobstructed, reduces artificial cleaning frequency.

Description

Technical Field

[0001] This invention relates to the field of lime kiln ventilation cap technology, and in particular to a device for restoring ventilation caps inside a lime kiln. Background Technology

[0002] The lime kiln is a key piece of equipment in lime production, and the uniformity and stability of its calcination process directly affect the quality of lime and energy consumption. During the operation of the lime kiln, the kiln vent cap, as a key air distribution device, is responsible for uniformly distributing airflow into the kiln, and its performance directly affects fuel combustion efficiency and the quality of calcined materials.

[0003] However, in actual production, the kiln's air hoods are constantly exposed to harsh environments of high temperature and high dust. Fine lime dust, crystals, and unreacted impurities generated during calcination easily adhere to and accumulate on the air hood's outlet and vent surfaces, gradually hardening and even blocking the air ducts due to the high temperature. This leads to severely uneven airflow distribution, poor local ventilation, and consequently, an imbalance in the kiln's temperature and atmosphere fields, causing problems such as under-burning, over-burning, and decreased product activity, while also increasing energy consumption per unit of product.

[0004] Currently, cleaning and maintaining the ventilation duct is a challenge for the industry. Traditional physical cleaning methods, such as using brushes or mechanical scraping after kiln shutdown, are labor-intensive, inefficient, and fail to thoroughly clean the kiln. Online cleaning methods using high-temperature resistant brushes suffer from drawbacks such as easy high-temperature aging, rapid wear, and short lifespan. While high-pressure gas backflushing has some effect, it can easily cause secondary dust re-entrainment in the enclosed space of the kiln, exacerbating the deterioration of kiln conditions and potentially interfering with the normal calcination airflow.

[0005] Therefore, developing a long-term cleaning mechanism that can automatically and efficiently remove ash from inside the air cap under continuous operation conditions of a lime kiln without affecting its normal uniform air distribution function, while avoiding secondary pollution and adapting to high-temperature environments, has become a key technical bottleneck for improving the operational stability and economic benefits of lime kilns. Summary of the Invention

[0006] In order to overcome the shortcomings of existing lime kiln vent caps, such as easy clogging in high temperature and high dust environments, difficulty in cleaning and maintenance, limited effectiveness of traditional cleaning methods, and easy interference with the kiln's internal working conditions, this invention provides a restoration device for lime kiln vent caps.

[0007] The technical implementation of the present invention is as follows: a restoration device for the air cap inside a lime kiln, comprising an annular air guide frame, an elastic telescopic cover, an air guide tube, a stacked side cover, guide rods, a lifting frame, an impeller, a splined shaft, an eccentric wheel, and a shaking assembly. An outlet is opened at the center of the top of the annular air guide frame, and multiple guide rods are fixedly connected to the outlet. A lifting frame is slidably connected between the guide rods. An air guide tube is connected to the outside of the lifting frame. An elastic telescopic cover is connected between the bottom edge of the air guide tube and the outer periphery of the outlet of the annular air guide frame. The air guide tube communicates with the outlet of the annular air guide frame. A stacked side cover is connected to the outside of the air guide tube. An air outlet is opened on the upper side of the stacked side cover. A staggered arrangement of square outlets is opened on the outer wall of the stacked side cover. The air outlet communicates with the square outlets. An impeller is rotatably connected to the center of the inside of the annular air guide frame. A splined shaft is splinedly connected to the impeller. The top of the splined shaft is rotatably connected to the lifting frame. A shaking assembly is assembled at the bottom of the annular air guide frame. Two eccentric wheels are provided on the shaking assembly, and the eccentric wheels are poweredly connected to the splined shaft.

[0008] As a further preferred option, the inner cavity of the annular air guide frame is set as an annular main air duct. The annular main air duct has multiple diversion channels opened in the circumferential direction towards the central outlet. The diversion channels are distributed radially on the outer periphery of the wind turbine.

[0009] As a further preferred option, the inner wall of the annular channel of the annular air guide frame is designed as a smooth arc surface.

[0010] As a further preferred option, the air duct and the stacked side cover are both made of high-temperature resistant alloy steel and coated with an anti-slagging coating.

[0011] As a further preferred option, the elastic telescopic cover is made of fluororubber and molded in one piece, and the corrugated section of the elastic telescopic cover is designed with a rounded transition structure.

[0012] As a further preferred embodiment, the vibration assembly includes a connecting plate, a rotating shaft, bevel gears, slide rails, sliders, hinge rods, tension springs, and vibration springs. The connecting plate is rotatably sleeved on the outer side of the lower end of the spline shaft. Multiple hinge rods are rotatably connected to the outer side of the connecting plate at intervals along the circumference. Multiple slide rails are fixedly connected to the bottom of the annular air guide frame at intervals along the circumference. Sliders are slidably connected to each slide rail. Tension springs are connected between the outer end of each slider and the outer side of the bottom of the annular air guide frame. The outer ends of each hinge rod are rotatably connected to the inner ends of the corresponding sliders. Vibration springs are connected between the top of the connecting plate and the bottom of the annular air guide frame. A rotating shaft is rotatably connected to the lower side of the connecting plate. Two eccentric wheels are fixedly connected to both ends of the rotating shaft. The eccentric wheels are designed with a fan-shaped eccentric structure, and their rotation center has a preset eccentricity distance from the axis of the rotating shaft. Bevel gears are connected to the bottom end of the spline shaft and the rotating shaft, and the two bevel gears mesh with each other.

[0013] As a further preferred embodiment, it also includes a wedge wheel, a lever, a tension spring, a pulley, and a striking shaft. The top of the spline shaft is connected to the wedge wheel, and the outer peripheral wall of the wedge wheel is provided with multiple guide slopes along the circumference. Multiple levers are rotatably connected to the top of the lifting frame. The inner end face of the middle section of each lever is connected to the lifting frame with a tension spring. One end of each lever is rotatably connected to a pulley, and each pulley forms a rolling contact with the guide slope. The outer end face of the middle section of each lever is connected to a striking shaft, and the striking shaft contacts the wall surface of the lifting frame.

[0014] As a further preferred embodiment, it also includes a cylinder, a return spring, and an inverted cone cover. The cylinder is slidably connected to the upper part of the inner cavity of the air guide tube. A return spring is connected between the outer wall of the cylinder and the inner wall of the air guide tube. An inverted cone cover is connected to the top of the cylinder. The inverted cone structure of the inverted cone cover is completely placed inside the inner cavity of the air guide tube. Initially, the inverted cone cover closes the air outlet. Multiple air guide ports are spaced apart on the upper outer peripheral wall of the cylinder.

[0015] The beneficial effects of this invention are as follows: 1. The airflow-driven impeller drives the eccentric wheel to rotate, generating periodic excitation force, which is transmitted to the air guide tube and the stacked side cover through the spline shaft and lifting frame, causing it to vibrate at high frequency, effectively shaking off the dust and scale adhering to the inner wall of the air duct, keeping the air outlet unobstructed, and reducing the frequency of manual cleaning.

[0016] 2. Through the combination of the annular air guide frame, air guide tube and stacked side cover, the airflow is guided by the pointed cone cover and diffuses evenly into different heights and directions in the kiln through the staggered square outlets, forming a radial air distribution effect, which is conducive to uniform gas-solid contact during lime calcination and improves combustion efficiency and calcination quality.

[0017] 3. The wedge wheel and lever work together to convert the rotation of the spline shaft into periodic tapping of the striking shaft, which further transmits additional vibration force to the air duct. In conjunction with the vibration component, it enhances the vibration cleaning intensity on the inner wall of the air duct and the outlet of the stacked side cover, preventing dust accumulation.

[0018] 4. Through the linkage structure between the inverted cone hood and the cylinder, the air outlet is automatically closed when the air is stopped, preventing dust and high-temperature flue gas in the kiln from flowing back into the air duct, reducing heat loss, maintaining a stable temperature inside the kiln, and eliminating the need for pre-exhausting cold air when restarting, thus saving fan energy consumption. Attached Figure Description

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a three-dimensional structural diagram of the components of the present invention, including the air duct, the stacked side cover, and the guide rod.

[0021] Figure 3 This is a three-dimensional structural diagram of the air outlet, guide rod, and lifting frame components of the present invention.

[0022] Figure 4 This is a three-dimensional structural diagram of the components of the present invention, including the impeller, splined shaft, and eccentric wheel.

[0023] Figure 5 This is a three-dimensional structural diagram of the connecting disc, rotating shaft, and bevel gear components of the present invention.

[0024] Figure 6 This is a breakdown diagram of the components of the present invention, including the wind turbine, eccentric wheel, and bevel gear.

[0025] Figure 7 This is a three-dimensional structural diagram of the air guide tube, lifting frame, and wedge wheel components of the present invention.

[0026] Figure 8 This is a three-dimensional structural diagram of the lever, tension spring, pulley, and other components of the present invention.

[0027] Figure 9 This is a three-dimensional structural diagram of the components of the present invention, including the cylinder, the reset spring, and the stacked side covers.

[0028] Figure 10 This is a three-dimensional structural diagram of the components of the present invention, including the cylinder, the return spring, and the inverted cone cover.

[0029] Figure 11 This is a schematic diagram of the planar structure of the components of the present invention, such as the inverted cone cover, air guide, and air guide tube.

[0030] Figure 12 This is a three-dimensional structural diagram of the air guide tube, reset spring, and inverted cone cover of the present invention.

[0031] The markings in the diagram are as follows: 1: Annular air guide frame, 101: Elastic telescopic cover, 102: Air guide tube, 103: Layered side cover, 104: Air outlet, 105: Guide rod, 106: Lifting frame, 107: Fan wheel, 108: Splined shaft, 109: Eccentric wheel, 201: Connecting plate, 202: Rotating shaft, 203: Bevel gear, 204: Slide rail, 205: Slider, 206: Hinge rod, 207: Tension spring one, 208: Vibration spring, 301: Wedge wheel, 302: Toggle lever, 303: Tension spring two, 304: Pulley, 305: Striking shaft, 401: Cylinder body, 402: Return spring, 403: Inverted cone cover, 404: Air guide port. Detailed Implementation

[0032] Example: A device for restoring the ventilation cap inside a lime kiln, such as... Figures 1-6As shown, the device includes an annular air guide frame 1, an elastic telescopic cover 101, an air guide tube 102, a stacked side cover 103, an air outlet 104, guide rods 105, a lifting frame 106, a fan wheel 107, a splined shaft 108, an eccentric wheel 109, and a vibration assembly. The annular air guide frame 1 serves as the mounting and air guiding foundation for the device. A guide outlet communicating with the inner cavity is located at the center of its top. At least three guide rods 105 are vertically fixed at equal intervals along the circumference of the top of this guide outlet. A lifting frame 106 is vertically slidably connected between all the guide rods 105. The air guide tube 102 is vertically connected to the outside of the lifting frame 106. An elastic telescopic cover 101 is sealed between the bottom edge of the air guide tube 102 and the outer periphery of the top guide outlet of the annular air guide frame 1. The air guide 102 achieves airflow sealing between the air guide 102 and the annular air guide frame 1, and also provides expansion and contraction compensation for the lifting and lowering movement of the air guide 102. The elastic expansion cover 101 is integrally molded from fluororubber material, and the corrugated section of the elastic expansion cover 101 is designed with a rounded transition structure. The fluororubber material is resistant to corrosion from high-temperature flue gas in the kiln, and the rounded transition corrugated structure improves fatigue resistance during the expansion and contraction process, avoiding tearing and damage caused by frequent shaking. The inner cavity of the air guide 102 is connected to the top of the annular air guide frame 1. A stacked side cover 103 is connected to the upper outer side of the air guide 102. The stacked side cover 103 is the core component for airflow diffusion. Multiple air outlets 104 are evenly spaced along the circumference at a position flush with the top surface of the air guide 102 on its inner upper side. The top of the 3 is designed as a pointed cone structure, which is used to block the airflow from rising vertically and force it to diffuse radially. The outer walls of the stacked side covers 103 are arranged in a stepped manner. Each stepped side cover has staggered square outlets, and the air outlets 104 are connected to the square outlets, forming a multi-stage diffusion air duct. The stacked side covers 103 have an outward expansion structure, which can guide the airflow to diffuse radially and evenly into the lime kiln, ensuring the consistency of air distribution in the calcination area. The inner center of the annular air guide frame 1 is rotatably connected to the air impeller 107 through a bearing at the position corresponding to the air guide outlet. A spline shaft 108 is vertically movably inserted through the middle of the air impeller 107. The spline shaft 108 and the air impeller 107 form a spline fit, so that the spline shaft 108 can move along the axis of the air impeller 107. The impeller 107 moves in the direction of rotation, and when it rotates, it drives the spline shaft 108 to rotate synchronously. The top end of the spline shaft 108 passes through the lifting frame 106 and is rotatably connected to the lifting frame 106 via bearings, achieving coaxial lifting of the lifting frame 106 and the spline shaft 108 without interfering with the rotation of the spline shaft 108. The bottom end of the spline shaft 108 passes through the bottom of the annular air guide frame 1 and extends to its outside. The bottom of the annular air guide frame 1 is equipped with a vibration component, on which two eccentric wheels 109 are fixed. The eccentric wheels 109 and the spline shaft 108 form a power connection. The inner cavity of the annular air guide frame 1 is set as an annular main air duct. The annular main air duct has multiple diversion channels opened in the circumferential direction towards the central guide outlet. The diversion channels are radially distributed on the outer periphery of the impeller 107.The airflow within the annular main air duct is concentrated and guided through the guide outlet into the guide duct 102. Flange interfaces for connecting the fan are provided on both the left and right side walls of the annular guide frame 1, achieving a sealed connection with the external air supply system. The inner wall of the annular channel of the annular guide frame 1 is designed with a smooth arc surface to reduce airflow resistance and lower pressure loss. The guide duct 102 and the stacked side covers 103 are both made of high-temperature resistant alloy steel and coated with an anti-slag coating to improve the durability and oxidation resistance of key components in the high-temperature and corrosive environment of the lime kiln, reduce high-temperature deformation and scale adhesion, and extend the overall service life of the device.

[0033] like Figures 2-6 As shown, the vibration assembly includes a connecting plate 201, a rotating shaft 202, a bevel gear 203, a slide rail 204, a slider 205, a hinge rod 206, a tension spring 207, and a vibration spring 208. The connecting plate 201 is rotatably sleeved on the outer side of the extended end of the spline shaft 108. Four hinge rods 206 are rotatably connected to the outer side of the connecting plate 201 circumferentially at intervals via pins. Four slide rails 204 are bolted circumferentially at intervals at the bottom of the annular air guide frame 1. Slider 205s are slidably connected to each slide rail 204. Tension springs 207 are connected between the outer end of each slider 205 and the outer side of the bottom of the annular air guide frame 1. The outer ends of the hinge rods 206 are connected to the corresponding sides via pins. The inner end of the slider 205 is rotatably connected. A shaking spring 208 is connected between the top of the connecting plate 201 and the bottom of the annular air guide frame 1. The shaking spring 208 is sleeved on the outside of the spline shaft 108. The lower side of the connecting plate 201 is rotatably connected to the rotating shaft 202 through a bearing. Two eccentric wheels 109 are fixedly connected to the left and right ends of the rotating shaft 202 respectively. The eccentric wheel 109 is designed as a fan-shaped eccentric structure. The rotation center of its wheel body has a preset eccentric distance with the axis of the rotating shaft 202. The eccentric directions of the two eccentric wheels 109 are consistent to ensure that the centrifugal force is superimposed in the vertical direction. The bottom end of the spline shaft 108 and the rotating shaft 202 are both connected to bevel gears 203. The two bevel gears 203 mesh with each other.

[0034] The entire device is installed in a predetermined position inside the lime kiln via an annular air guide frame 1. The flange interface of the annular air guide frame 1 is sealed and connected to the kiln's air supply system or fan to complete the air source connection. After the fan is started, the fan pressurizes the gas and sends it into the annular main air duct of the annular air guide frame 1. The airflow flows along the annular main air duct and converges towards the impeller 107 through the radial diversion channels. Then, it enters the air guide duct 102 through the guide outlet at the top of the annular air guide frame 1. The airflow is vertically transported upward in the air guide duct 102 to the pointed cone at the top of the stacked side cover 103. The pointed cone prevents the airflow from rushing directly to the top of the kiln and forces the airflow to diffuse towards the outlet 104. The diffused airflow fills the cavity between the stacked side cover 103 and the air guide duct 102, and finally passes through the stacked side cover 103. The staggered square outlets on the side cover 103 evenly discharge air into the kiln at different heights and in different directions, meeting the uniform air distribution requirements during the lime calcination process. When the airflow flows towards the impeller 107 within the annular air guide frame 1, the kinetic energy of the airflow drives the impeller 107 to rotate around its axis. The impeller 107 drives the spline shaft 108 to rotate synchronously through spline engagement. When the spline shaft 108 rotates, it drives the rotating shaft 202 to rotate through two meshing bevel gears 203. The rotating shaft 202 then drives the eccentric wheels 109 at both ends to rotate synchronously. During the rotation of the eccentric wheels 109, their center of mass makes circular motion around the axis of the rotating shaft 202, generating a periodically changing centrifugal force. This centrifugal force is converted into a vertical component force on the spline shaft 108 through the bevel gears 203, driving the spline shaft 108 to rotate. The spline shaft 108 reciprocates axially. Since the two eccentric wheels 109 are aligned, the centrifugal forces generated during their rotation are superimposed in the vertical direction, maximizing the excitation force. When the spline shaft 108 vibrates up and down, it drives the connecting plate 201 to reciprocate synchronously. At this time, the vibration spring 208 compresses and resets with the movement of the connecting plate 201, amplifying the vibration. Simultaneously, the connecting plate 201, through the hinge rod 206, drives the slider 205 to reciprocate along the slide rail 204 in the inward and outward directions. The tension spring 207 stretches and resets with the movement of the slider 205, providing a stable reset force for the slider 205. The synergistic effect of the vibration spring 208 and the tension spring 207 not only further amplifies the vibration amplitude but also reduces the vibration of the spline shaft 108. More smoothly and regularly, the spline shaft 108 vibrates up and down, causing the lifting frame 106 to move vertically along the axis of the guide rod 105. The lifting frame 106 then causes the air duct 102 and the stacked side cover 103 to vibrate up and down synchronously. The elastic telescopic cover 101 expands and contracts during the lifting and lowering of the air duct 102 to ensure the sealing performance of the main air duct. The high-frequency up and down vibration of the air duct 102 and the stacked side cover 103 generates inertial impact force, causing the dust (including lime powder and scale that fell off during calcination) adhering to the inner wall of the square outlet of the stacked side cover 103 to fall off due to the "vibration desorption" effect. At the same time, the dust accumulated on the inner wall of the air duct 102 is loosened due to the "vibration friction" effect. The fallen dust slides off with the airflow or its own gravity, realizing the self-cleaning function of the device.When the fan stops supplying air, the driving force of the airflow on the impeller 107 disappears, and the impeller 107, splined shaft 108, and eccentric wheel 109 all stop rotating, simultaneously ceasing the self-cleaning operation.

[0035] like Figures 7-8 As shown, it also includes a wedge wheel 301, a lever 302, a tension spring 303, a pulley 304, and a striking shaft 305. The top of the spline shaft 108 is connected to the wedge wheel 301 via a key. The outer peripheral wall of the wedge wheel 301 is provided with four guide slopes that are inclined in the same direction at intervals along the circumference. The top of the lifting frame 106 is rotatably connected to four levers 302 at intervals along the circumference via shaft pins. The inner end face of the middle section of each lever 302 is connected to the lifting frame 106 with a tension spring 303. The tension spring 303 is in a slightly stretched state in the initial state, which is the lever. The lever 302 provides an initial preload, ensuring that the lever 302 always tends to return to its original position towards the wedge wheel 301. The end of the lever 302 closest to the wedge wheel 301 is rotatably connected to a pulley 304 via a pin. The position of each pulley 304 corresponds one-to-one with the guide slope of the wedge wheel 301 and forms a rolling contact engagement with the guide slope. Rolling friction replaces sliding friction, reducing component wear and improving transmission efficiency. The outer end face of the middle section of the lever 302 is fixedly connected to a striking shaft 305, which engages with the wall surface of the lifting frame 106.

[0036] When the spline shaft 108 rotates under the drive of the impeller 107, the wedge wheel 301 rotates synchronously with the spline shaft 108. During the rotation of the wedge wheel 301, the guide slope of its outer peripheral wall contacts the pulley 304 on the corresponding lever 302. The slope applies a radial thrust to the lever 302 through the pulley 304, pushing the lever 302 to rotate around the pivot pin in a direction away from the wedge wheel 301. During this process, the tension spring 303 is further stretched, converting kinetic energy into elastic potential energy. At the same time, the lever 302 drives the striking shaft 305 to rotate synchronously, causing the striking shaft 305 to disengage from the side wall of the lifting frame 106. When the wedge wheel 301 continues to rotate until the guide slope completely disengages from the pulley 304, the radial thrust applied to the lever 302 disappears, the tension spring 303 quickly releases its elastic potential energy and rebounds to its original position, driving the lever 302 to rotate around the pivot pin. The pin rapidly reverses direction towards the wedge wheel 301, and the striking shaft 305, under the elastic force of the tension spring 303, strikes the side wall of the lifting frame 106 at a high speed, generating a pulse-like impact force. The wedge wheel 301 continues to rotate, and the four guide ramps sequentially contact and disengage from the corresponding pulleys 304, causing the four levers 302 to drive the striking shaft 305 to alternately complete the "power storage-striking-resetting" cycle, realizing high-frequency reciprocating striking of the wall of the lifting frame 106. The pulse vibration force generated by the striking is transmitted through the lifting frame 106 to the air duct 102 and the stacked side cover 103, forming a superposition effect with the up and down vibration force generated by the vibration component, significantly improving the overall vibration intensity of the air duct 102 and the stacked side cover 103, especially having a stronger peeling effect on tightly attached scale and dust, further optimizing the self-cleaning performance of the device.

[0037] like Figures 9-12 As shown, it also includes a cylinder 401, a return spring 402, and an inverted cone cover 403. The cylinder 401 is vertically slidably connected to the upper part of the inner cavity of the air guide 102. Its outer wall maintains a clearance fit with the inner wall of the air guide 102 to ensure smooth sliding. A return spring 402 is connected between the outer wall of the cylinder 401 and the inner wall of the air guide 102. An inverted cone cover 403 is welded to the top of the cylinder 401. The inverted cone structure of the inverted cone cover 403 is completely placed inside the inner cavity of the air guide 102, with its cone surface facing downwards, which can efficiently receive the upward airflow. The inverted cone cover 403 and the stacked side cover 10 3. The inner sliding connection is used. When there is no airflow, the top surface of the inverted cone cover 403 is completely in contact with the bottom surface of the air outlet 104 on the stacked side cover 103, so as to achieve full coverage and closure of the air outlet 104. Multiple air guides 404 are spaced apart along the circumferential direction on the upper outer peripheral wall of the cylinder 401. When the cylinder 401 and the inverted cone cover 403 move up to the height of the air guides 404 and the air outlet 104, the inverted cone cover 403 and the air outlet 104 are disengaged. The inner cavity of the air guide cylinder 102 is connected to the internal cavity of the stacked side cover 103 through the air guides 404 to achieve airflow.

[0038] When the device is in use (fan off), the top surface of the inverted cone cover 403 is tightly fitted to the bottom surface of the air outlet 104 of the stacked side cover 103, completely sealing the air outlet 104. At this time, the external environment is isolated from the inner cavity of the air guide duct 102, effectively preventing foreign objects from entering. When the device is put into use, and the fan delivers pressurized gas to the inner cavity of the air guide duct 102, the airflow flows upward along the axial direction of the air guide duct 102, forming a vertical impact with the inverted cone surface of the inverted cone cover 403. When the airflow impact force is greater than the preload force of the return spring 402, The airflow pushes the inverted cone cover 403, causing the cylinder 401 to slide upward along the inner cavity of the air guide duct 102. The return spring 402 is stretched and stores elastic potential energy. As the cylinder 401 continues to move upward, when the air guide port 404 on the cylinder 401 is at the same height as the air outlet 104 of the stacked side cover 103, the airflow channel is fully opened. The gas in the inner cavity of the air guide duct 102 enters the air outlet 104 through the air guide port 404, and then is evenly discharged into the calcination area of ​​the kiln through the staggered square outlets of the stacked side cover 103 to meet the air distribution requirements.

[0039] When the calcination process in the kiln requires adjustment to reduce the air supply or to shut down, the airflow impact force acting on the inverted cone shroud 403 weakens or disappears. The return spring 402 releases its elastic potential energy and rebounds to its original position, causing the cylinder 401 and the inverted cone shroud 403 to move downwards along the axial direction of the air guide duct 102. The air guide port 404 and the air outlet 104 gradually misalign until they are completely separated. The top surface of the inverted cone shroud 403 then comes into contact with the bottom surface of the air outlet 104, achieving automatic closure of the air outlet 104. This structure can directly block... High-temperature lime dust and calcination residue inside the kiln flow back into the inner cavity of the air guide duct 102 from the air outlet 104. This effectively prevents the high-temperature flue gas inside the kiln from escaping outward through the air guide duct 102, reducing heat loss and helping to maintain the high-temperature environment required for calcination inside the kiln. When the fan is restarted, since the inner cavity of the air guide duct 102 remains sealed, there is no need to pre-expel the accumulated cold air inside. The pressurized gas can be directly delivered to the kiln, thereby shortening the heating time and reducing the start-up energy consumption of the fan.

Claims

1. A device for restoring the ventilation cap inside a lime kiln, characterized in that: The system includes an annular air guide frame (1), an elastic telescopic cover (101), an air guide tube (102), a stacked side cover (103), guide rods (105), a lifting frame (106), a windmill (107), a splined shaft (108), an eccentric wheel (109), and a vibration assembly. An outlet is located at the center of the top of the annular air guide frame (1). Multiple guide rods (105) are fixed to the outlet. A lifting frame (106) is slidably connected between the guide rods (105). An air guide tube (102) is connected to the outside of the lifting frame (106). An elastic telescopic cover (101) is connected between the bottom edge of the air guide tube (102) and the outer periphery of the outlet of the annular air guide frame (1). The air guide tube (102) and the annular air guide... The outlet of the wind frame (1) is connected, and the outer side of the air guide tube (102) is connected to the stacked side cover (103). An air outlet (104) is opened on the upper side of the stacked side cover (103). The outer side wall of the stacked side cover (103) is provided with staggered square outlets. The air outlet (104) is connected to the square outlet. The center of the annular air guide frame (1) is rotatably connected to the wind wheel (107). The wind wheel (107) is splined and connected to the spline shaft (108). The top of the spline shaft (108) is rotatably connected to the lifting frame (106). The bottom of the annular air guide frame (1) is equipped with a shaking component. Two eccentric wheels (109) are provided on the shaking component. The eccentric wheels (109) are poweredly connected to the spline shaft (108).

2. The device for restoring the ventilation cap inside a lime kiln as described in claim 1, characterized in that: The inner cavity of the annular air guide frame (1) is set as an annular main air duct. The annular main air duct has multiple diversion channels along the circumferential direction towards the central outlet. The diversion channels are distributed radially around the outer periphery of the wind turbine (107).

3. The device for restoring the ventilation cap inside a lime kiln as described in claim 2, characterized in that: The inner wall of the annular channel of the annular air guide frame (1) is set as a smooth arc surface.

4. The device for restoring the ventilation cap inside a lime kiln as described in claim 3, characterized in that: The air duct (102) and the stacked side cover (103) are both made of high-temperature resistant alloy steel and are coated with an anti-slagging coating.

5. The device for restoring the ventilation cap inside a lime kiln as described in claim 4, characterized in that: The elastic telescopic cover (101) is integrally molded from fluororubber material, and the corrugated section of the elastic telescopic cover (101) is designed with a rounded transition structure.

6. The device for restoring the ventilation cap inside a lime kiln as described in claim 5, characterized in that: The vibration assembly includes a connecting plate (201), a rotating shaft (202), a bevel gear (203), a slide rail (204), a slider (205), a hinge rod (206), a tension spring (207), and a vibration spring (208). The connecting plate (201) is rotatably sleeved on the outer side of the lower end of the spline shaft (108). Multiple hinge rods (206) are rotatably connected to the outer side of the connecting plate (201) at intervals along the circumference. Multiple slide rails (204) are fixedly connected to the bottom of the annular air guide frame (1) at intervals along the circumference. Sliders (205) are slidably connected to each slide rail (204). The outer end of each slider (205) is connected to the outer side of the bottom of the annular air guide frame (1). The outer ends of the tension spring (207) and the hinge rod (206) are rotatably connected to the inner ends of the corresponding slider (205). A shaking spring (208) is connected between the top of the connecting plate (201) and the bottom of the annular air guide frame (1). A rotating shaft (202) is rotatably connected to the lower side of the connecting plate (201). Two eccentric wheels (109) are fixedly connected to both ends of the rotating shaft (202). The eccentric wheel (109) is designed as a fan-shaped eccentric structure. The rotation center of its wheel body has a preset eccentric distance from the axis of the rotating shaft (202). The bottom end of the spline shaft (108) and the rotating shaft (202) are both connected to bevel gears (203). The two bevel gears (203) mesh with each other.

7. The device for restoring the ventilation cap inside a lime kiln as described in claim 6, characterized in that: It also includes a wedge wheel (301), a lever (302), a tension spring (303), a pulley (304), and a striking shaft (305). The top of the spline shaft (108) is connected to the wedge wheel (301). The outer peripheral wall of the wedge wheel (301) is provided with multiple guide slopes along the circumferential direction. The top of the lifting frame (106) is rotatably connected to multiple levers (302). The inner end face of the middle section of each lever (302) is connected to the lifting frame (106) with a tension spring (303). One end of each lever (302) is rotatably connected to a pulley (304). Each pulley (304) forms a rolling contact with the guide slope. The outer end face of the middle section of each lever (302) is connected to a striking shaft (305). The striking shaft (305) is in contact with the wall of the lifting frame (106).

8. The device for restoring the ventilation cap inside a lime kiln as described in claim 7, characterized in that: It also includes a cylinder (401), a return spring (402) and an inverted cone cover (403). The cylinder (401) is slidably connected to the upper part of the inner cavity of the air guide tube (102). The return spring (402) is connected between the outer wall of the cylinder (401) and the inner wall of the air guide tube (102). The inverted cone cover (403) is connected to the top of the cylinder (401). The inverted cone structure of the inverted cone cover (403) is completely placed inside the inner cavity of the air guide tube (102). Initially, the inverted cone cover (403) closes the air outlet (104). Multiple air guide ports (404) are spaced apart on the upper outer peripheral wall of the cylinder (401).

Images