Rotary kiln formed ring cleaning device

Abstract

The utility model provides a rotary kiln formed ring cleaning device. Comprising a base, a scraper assembly and a driving assembly. The driving assembly is arranged on the base and comprises a driving motor, a transmission shaft and a speed reducer, an output shaft of the driving motor is connected with an input shaft of the speed reducer, an output shaft of the speed reducer is connected with the end of one side of the transmission shaft, and the end of the other side of the transmission shaft extends out of the outer side of the base and is fixedly connected with the scraper assembly. The scraper assembly comprises an assembling platform and a plurality of cutting handles, the cutting handles are sequentially arranged on the assembling platform in the axis direction of the transmission shaft, cutting blades are arranged at the ends of the cutting handles, and the cutting blades make contact with the inner wall ring of the rotary kiln. Ring forming materials in the kiln are thoroughly cleaned, the ring cleaning quality is good, and the labor intensity is reduced. Compared with the prior art that mechanical ring cleaning needs to be conducted after the kiln is stopped, production stopping time is not needed, and the influence on production is small.

Description

Technical Field

[0001] The utility model relates to a rotary kiln ring cleaning device. Background Art

[0002] The rotary kiln is a continuously rotating high-temperature kiln, which is the core equipment in the production line of oxidation pellets and direct reduced iron process. During the operation of the rotary kiln, due to the rough surface of the refractory material (furnace lining) on ​​the inner surface of the kiln, the powder and low-melting-point substances that fall off from the surface of the pellets under high temperature conditions are easy to adhere to the surface of the refractory material. As the rotary kiln continues to rotate, a circle of adhesive material, namely ringing, is formed on the inner surface of the kiln. The ringing problem is the main factor affecting the normal production of the rotary kiln. Severe ringing will increase the gravity load in the kiln, increase the equipment load, reduce production capacity, and cause the furnace charge to run unsmoothly. At the same time, it will cause the refractory material to be torn and peeled off, affecting the service life of the furnace lining. When the rotary kiln is seriously ringed, the kiln needs to be stopped for manual removal of the rings, otherwise it will affect the availability of the rotary kiln equipment. Manual ring removal includes ring burning and ring collision method, rapid cooling method and mechanical ring cleaning. In the early stage of ring formation in the rotary kiln, due to the loose structure of the ring material, low metal iron content and low ring hardness, the ring material can be heated to a higher temperature. After the ring material reaches the softening point at high temperature, it will deform. At this time, a block with a higher melting point is placed in the kiln to hit the ring, and the ring is ground by friction, collision and other methods. In the middle and late stages of ring formation in the rotary kiln, due to the dense ring material, high metal iron content and high ring hardness, the ring burning and ring hitting method is invalid, and the rapid cooling method or mechanical ring cleaning is required. The rapid cooling method is a rapid cooling method at high temperature to clean the ring material. During the rapid cooling process, the refractory material of the kiln body is greatly damaged. At the same time, the cleaning of the ring material in the kiln is not thorough, and the ring cleaning quality is poor. Mechanical ring cleaning is to manually hold a steel pipe to knock the ring layer, which has high labor intensity and the steel pipe is damaged quickly. At present, mechanical ring cleaning needs to be cleaned after the kiln is stopped. Generally, it takes several days to cool the kiln, and the shutdown time is long, which has a great impact on production.

[0003] The utility model with application number CN202320027424.1 provides a cleaning device, which relates to the field of smelting, to solve the technical problems that the cleaning of rotary kiln rings requires shutdown, is inefficient and affects production. The cleaning device is used to clean the rings of high-temperature rotary kilns. The cleaning device includes an impact cylinder, a piston rod, and a crushing head provided at the end of the piston rod away from the impact cylinder. The piston rod is connected to the piston of the impact cylinder. The crushing head is used to crush the rings in the rotary kiln through the reciprocating impact motion of the piston rod; at least part of the piston rod is provided with a cooling pipeline, and the cooling pipeline is used to reduce the temperature of the crushing head by conveying coolant to the crushing head.

[0004] However, the cleaning device in the above patented technology does not take into account the protection of the kiln body refractory materials. The rotary kiln rings are tightly combined with the kiln lining refractory materials, and vibration and impact may cause the kiln lining refractory materials to break. Utility Model Content

[0005] The purpose of the utility model is to provide a rotary kiln ring cleaning device to solve the problems raised in the above background technology:

[0006] (1) How to realize the cleaning procedure of stripping the ring-forming materials without stopping the rotary kiln and effectively clean the ring-forming materials in the rotary kiln.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A rotary kiln ring cleaning device;

[0009] It includes a base, a scraper assembly and a drive assembly;

[0010] The driving assembly is arranged on the base, and the driving assembly includes a driving motor, a transmission shaft and a reducer. The output shaft of the driving motor is connected to the input shaft of the reducer, the output shaft of the reducer is connected to one end of the transmission shaft, and the other end of the transmission shaft extends out of the outside of the base and is fixedly connected to the scraper assembly. The scraper assembly includes an assembly platform and a plurality of cutting handles, which are arranged on the assembly platform in sequence along the axial direction of the transmission shaft. A cutting blade is provided at the end of the cutting handle, and the cutting blade is in contact with the inner wall of the rotary kiln.

[0011] On the basis of the above technical solution, the present invention can also be improved as follows.

[0012] Furthermore, it also includes a sliding component, which includes a moving plate, and the driving motor and reducer of the driving component are fixedly connected to the moving plate. The moving plate can reciprocate on the base along the axial direction of the transmission shaft.

[0013] Furthermore, the sliding assembly also includes a plurality of sliders and a plurality of linear slide rails, which are arranged in sequence on the upper end surface of the base, the direction of the linear slide rails is consistent with the axial direction of the transmission shaft, the plurality of sliders are respectively matched with the linear slide rails, and the plurality of sliders are fixedly connected to the base.

[0014] Furthermore, it also includes a propulsion assembly, which includes a propulsion motor, a worm gear mechanism, a screw and a nut. The two ends of the screw are respectively supported on the upper end surface of the base. The propulsion motor drives the screw to rotate through the worm gear mechanism. The nut cooperates with the screw, and the nut is fixedly connected to the movable plate.

[0015] Furthermore, it also includes at least one group of support components, which include a support frame and a support sleeve. The lower end of the support frame is fixedly connected to the upper end surface of the base, and the upper end of the support frame is fixedly connected to the support sleeve. The transmission shaft passes through the support sleeve and extends out of the outside of the base, and the side wall of the transmission shaft and the inner wall of the support sleeve are matched through bearings.

[0016] Furthermore, the cutting blade is a high temperature resistant alloy blade.

[0017] Furthermore, the scraper assembly also includes a limiting ring, a guide rod, a support plate and a plurality of tension springs. The ends of the plurality of cutting knife handles are hinged to the assembly platform in sequence along the axial direction of the transmission shaft. The starting end of the cutting knife handle is inclined to extend outward from the assembly platform. The diameter of the circle where the starting ends of all the cutting knife handles are located is larger than the diameter of the circle where the ends of all the cutting knife handles are located. The limiting ring is fixedly connected to the assembly platform. The outer side walls of all the cutting knife handles are against the inner wall of the limiting ring. The end of the guide rod is fixedly connected to the assembly platform. The starting end of the guide rod extends in a direction away from the driving assembly. The length direction of the guide rod is consistent with the axial direction of the transmission shaft. The support plate is mounted on the side wall of the guide rod. The support plate can move back and forth along the axial direction of the guide rod. The outer walls of the support plate respectively abut against the inner side walls of all the cutting knife handles. The starting end of the tension spring is fixed to the support plate, and the end of the tension spring is fixed to the assembly platform.

[0018] Furthermore, a spiral blade is fixedly connected to the side wall of the transmission shaft close to the scraper assembly.

[0019] After adopting such a structure, in the middle and late stages of the rotary kiln ringing, the rotary kiln does not need to be shut down. The cutting blade of the scraper assembly of the rotary kiln ring cleaning device peels the rings off the rotary kiln wall, and then breaks the rings through the cutting handle, so that the rings are first peeled off and then broken. Finally, the blades on the transmission shaft transport the broken rings to the outside of the rotary kiln, so as to effectively clean up the rings accumulated in the front and prevent them from hindering the operation of the drill bit. At the same time, peeling off first and then breaking also effectively protects the refractory material of the rotary kiln lining.

[0020] The beneficial technical effects of the rotary kiln ring cleaning device are: the ring materials in the kiln are cleaned thoroughly, the ring cleaning quality is good, and the labor intensity is reduced. Compared with the mechanical ring cleaning in the prior art, which needs to be cleaned after the kiln is stopped, there is no need to stop production time, and the impact on production is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a cross-sectional view of a rotary kiln in the prior art.

[0022] Figure 2 It is a front view of an embodiment of the rotary kiln ring cleaning device.

[0023] Figure 3 It is a top view of an embodiment of the rotary kiln ring cleaning device.

[0024] Figure 4 It is a sectional view of the main view of the scraper assembly in the embodiment of the rotary kiln ring cleaning device.

[0025] Description of the numbers in the figure:

[0026] Rotary kiln-100; ring-110; driving motor-210; transmission shaft-220; reducer-230; moving plate-310; linear slide rail-320; slider-330; base-400; propulsion motor-510; worm gear mechanism-520; nut-530; screw-540; support frame-610; support sleeve-620; scraper assembly-700; assembly platform-710; cutting handle-720; cutting blade-721; limit ring-730; guide rod-740; support plate-750; tension spring-760. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation of the utility model is described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific implementation disclosed below.

[0028] The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementations.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0030] See also Figures 1 to 4 .

[0031] The rotary kiln ring cleaning device comprises a base 400, a scraper assembly 700, a sliding assembly, a propulsion assembly, a driving assembly and two sets of supporting assemblies.

[0032] The driving assembly includes a driving motor 210, a transmission shaft 220 and a reducer 230. The output shaft of the driving motor 210 is connected to the input shaft of the reducer 230. The output shaft of the reducer 230 is connected to one end of the driving shaft 220. The other end of the driving shaft 220 extends out of the base 400 and is fixed to the scraper assembly 700.

[0033] The sliding assembly includes a moving plate 310, four sliders 330 and two linear slide rails 320. The driving motor 210 and the reducer 230 of the driving assembly are fixed to the moving plate 310 by bolts. The two linear slide rails 320 are installed in parallel on the upper end surface of the base 400. The direction of the linear slide rails 320 is consistent with the axial direction of the transmission shaft 220. The four sliders 330 are respectively matched with the two linear slide rails 320, and the four sliders 330 are fixed to the base 400 by bolts, so that the moving plate 310 can reciprocate on the base 400 along the axial direction of the transmission shaft 220.

[0034] The propulsion assembly includes a propulsion motor 510, a worm gear mechanism 520, a screw 540 and a nut 530. Both ends of the screw 540 are respectively supported on the upper end surface of the base 400. The propulsion motor 510 and the worm gear mechanism 520 are fixed to the base 400 by bolts. The propulsion motor 510 drives the screw 540 to rotate through the worm gear mechanism 520. The nut 530 cooperates with the screw 540, and the nut 530 is fixed to the movable plate 310 by bolts.

[0035] The support assembly includes a support frame 610 and a support sleeve 620. The lower end of the support frame 610 is welded to the upper end surface of the base 400, and the upper end of the support frame 610 is welded and fixed to the support sleeve 620. The transmission shaft 220 passes through the support sleeve 620 and extends out of the outside of the base 400, and the side wall of the transmission shaft 220 and the inner wall of the support sleeve 620 are matched through bearings.

[0036] The scraper assembly 700 includes an assembly platform 710, a limiting ring 730, a guide rod 740, a support plate 750, a plurality of tension springs 760 and a plurality of cutting handles 720. The plurality of cutting handles 720 are evenly arranged in a circle on the assembly platform 710 along the axial direction of the transmission shaft 220. The ends of the plurality of cutting handles 720 are hinged to the assembly platform 710 through pins in sequence along the axial direction of the transmission shaft 220. The starting ends of the cutting handles 720 extend outward from the assembly platform 710 at an angle, and the diameter of the circle where the starting ends of all the cutting handles 720 are located is greater than the diameter of the circle where the ends of all the cutting handles 720 are located.

[0037] The limiting ring 730 is welded and fixed to the assembly platform 710 through a bracket, and the middle parts of the outer side walls of all the cutting handles 720 are against the inner wall of the limiting ring 730. The limiting ring 730 limits the outward tilting angle of all the cutting handles 720. The end of the guide rod 740 is fixedly installed at the center position of the assembly platform 710, and the starting end of the guide rod 740 extends in the direction away from the driving component. The length direction of the guide rod 740 is consistent with the axial direction of the transmission shaft 220. The support plate 750 is mounted on the side wall of the guide rod 740. The support plate 750 can move back and forth along the axial direction of the guide rod 740. The outer walls of the support plate 750 are respectively against the inner side walls of all the cutting handles 720. The starting end of the tension spring 760 is fixed to the support plate 750, and the end of the tension spring 760 is fixed to the assembly platform 710.

[0038] A cutting blade 721 is provided at the end of the cutting handle 720. The cutting blade 721 is in contact with the inner wall of the rotary kiln 100. The cutting blade 721 is a high temperature resistant alloy blade.

[0039] The side wall of the transmission shaft 220 near the scraper assembly 700 is fixedly connected with a spiral blade 221, and a water cooling circulation loop can be set inside the transmission shaft 220 and the blade 221. The transmission shaft 220 and the blade 221 can also be made of high temperature resistant material.

[0040] When in use, the rotary kiln 100 does not need to be stopped. The propulsion motor 510 of the propulsion assembly is started to rotate. The propulsion motor 510 drives the moving plate 310 to move toward the rotary kiln 100 through the screw rod 540 and the nut 530. The scraper assembly 700 follows the moving plate 310 and moves synchronously toward the inside of the rotary kiln 100. During this process, the cutting blade 721 contacts the ring on the inner wall of the rotary kiln 100 to peel off the ring 110 from the kiln wall of the rotary kiln 100.

[0041] The cutting blade 721 of the scraper assembly 700 of the rotary kiln ring cleaning device peels the ring 110 off the wall of the rotary kiln 100, and then breaks the ring 110 through the cutting handle 720, so that the ring 110 is first peeled off and then broken. Finally, the blade 221 on the transmission shaft 220 transports the broken ring 110 to the outside of the rotary kiln 100, so as to effectively clean the ring 110 accumulated in the front and prevent it from hindering the operation of the drill bit. At the same time, peeling off first and then breaking also effectively protects the refractory material of the rotary kiln 100 lining.

[0042] The rotary kiln ring cleaning device first peels off, then crushes and transports, and at the same time protects the kiln lining refractory, transports the front deposits to the rear, and can reciprocate to achieve two cleanings. In the second cleaning, in addition to further scraping, the ring deposits can also be pushed out of the rotary kiln 100 kiln mouth.

[0043] After long-term use, the cutting blade 721 will be worn or broken. Under the action of multiple tension springs 760, the outer wall of the support plate 750 of the scraper assembly 700 always rests on the inner side walls of all the cutting handles 720, and the cutting handles 720 drive the cutting blade 721 to always contact the ring 110 on the kiln wall of the rotary kiln 100.

[0044] The above is only one embodiment of the present invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the principle of the present invention, and these should also be regarded as belonging to the protection scope of the present invention.

Claims

1. A rotary kiln ring cleaning device, characterized by: It comprises a base (400), a scraper assembly (700) and a driving assembly; The driving assembly is arranged on the base (400), and comprises a driving motor (210), a transmission shaft (220) and a reducer (230). The output shaft of the driving motor (210) is connected to the input shaft of the reducer (230), the output shaft of the reducer (230) is connected to one end of the transmission shaft (220), the other end of the transmission shaft (220) extends out of the outside of the base (400) and is fixedly connected to the scraper assembly (700). The scraper assembly (700) comprises an assembly platform (710) and a plurality of cutting handles (720). The plurality of cutting handles (720) are sequentially arranged on the assembly platform (710) along the axis direction of the transmission shaft (220), and a cutting blade (721) is provided at the end of the cutting handle (720), and the cutting blade (721) is in contact with the inner wall of the rotary kiln (100).

2. The rotary kiln ring cleaning device according to claim 1 is characterized in that: The invention also comprises a sliding assembly, wherein the sliding assembly comprises a moving plate (310), a driving motor (210) and a reducer (230) of the driving assembly are fixedly connected to the moving plate (310), and the moving plate (310) can reciprocate on the base (400) along the axial direction of the transmission shaft (220).

3. The rotary kiln ring cleaning device according to claim 2 is characterized in that: The sliding assembly further comprises a plurality of sliders (330) and a plurality of linear slide rails (320). The plurality of linear slide rails (320) are sequentially arranged on the upper end surface of the base (400). The direction of the linear slide rails (320) is consistent with the axial direction of the transmission shaft (220). The plurality of sliders (330) are respectively matched with the linear slide rails (320), and the plurality of sliders (330) are fixedly connected to the base (400).

4. The rotary kiln ring cleaning device according to claim 2 is characterized in that: The propulsion assembly also includes a propulsion motor (510), a worm gear mechanism (520), a screw (540) and a nut (530). Both ends of the screw (540) are respectively supported on the upper end surface of the base (400). The propulsion motor (510) drives the screw (540) to rotate through the worm gear mechanism (520). The nut (530) cooperates with the screw (540), and the nut (530) is fixedly connected to the movable plate (310).

5. The rotary kiln ring cleaning device according to claim 1 is characterized in that: The invention also comprises at least one group of support components, wherein the support components comprise a support frame (610) and a support sleeve (620), wherein the lower end of the support frame (610) is fixedly connected to the upper end surface of the base (400), the upper end of the support frame (610) is fixedly connected to the support sleeve (620), the transmission shaft (220) passes through the support sleeve (620) and then extends out of the outside of the base (400), and the side wall of the transmission shaft (220) and the inner wall of the support sleeve (620) are matched via a bearing.

6. The rotary kiln ring cleaning device according to claim 1 is characterized in that: The cutting blade (721) is a high temperature resistant alloy blade.

7. The rotary kiln ring cleaning device according to claim 1 is characterized in that: The scraper assembly (700) further comprises a limiting ring (730), a guide rod (740), a support plate (750) and a plurality of tension springs (760); the ends of the plurality of cutting handles (720) are hinged to the assembly platform (710) in sequence along the axial direction of the transmission shaft (220); the starting ends of the cutting handles (720) are inclined to extend outward from the assembly platform (710); the diameter of the circle where the starting ends of all the cutting handles (720) are located is greater than the diameter of the circle where the ends of all the cutting handles (720) are located; the limiting ring (730) is fixedly connected to the assembly platform (710); the outer side walls of all the cutting handles (720) are against the limiting ring (730). On the inner wall of the ring (730), the end of the guide rod (740) is fixedly connected to the assembly platform (710), the starting end of the guide rod (740) extends in a direction away from the driving component, the length direction of the guide rod (740) is consistent with the axial direction of the transmission shaft (220), the support plate (750) is mounted on the side wall of the guide rod (740), the support plate (750) can reciprocate along the axial direction of the guide rod (740), the outer wall of the support plate (750) is respectively against the inner side walls of all the cutting handles (720), the starting end of the tension spring (760) is fixed to the support plate (750), and the end of the tension spring (760) is fixed to the assembly platform (710).

8. The rotary kiln ring cleaning device according to claim 1 is characterized in that: A spiral blade (221) is fixedly connected to the side wall of the transmission shaft (220) on the side close to the scraper assembly (700).

Images