An online cleaning device for rings in a rotary kiln

Abstract

The present invention discloses an online cleaning device for rings in a rotary kiln. This device, a type of production auxiliary equipment, comprises a drill bit, a drill rod, a guide bracket, a track, a moving assembly, a support assembly, a power assembly, and a post-adjustment device. The moving assembly comprises a moving trolley, a drive device, and a locking mechanism; the support assembly is a trolley mounted with a bracket; the power assembly comprises a hydraulic system, a power cylinder, and a hydraulic hammer; and the post-adjustment device comprises a sliding guide frame, an L-shaped slider with a pin hole, and a guide rod. Compared with existing technologies, the present invention can achieve online cleaning of rings in rotary kilns.

Description

Technical Field

[0001] The invention relates to metallurgical production auxiliary equipment, in particular to an on-line cleaning device for ring formation in a rotary kiln. Background Art

[0002] Rotary kilns are primarily used for heating and calcining a variety of mineral materials, including those used in metallurgy, building materials, and ores. Due to various factors, such as the raw material ratio and production process, low-melting-point silicate compounds are formed during the rotary kiln process. These rings form as sponge iron (DRI) rings from 0 meters into the kiln mouth to 8-25 meters inside. These rings gradually develop a trumpet-like shape along their length, with a thickness of 400-600 mm at 8 meters, gradually extending to 25 meters, reaching a maximum thickness of 1500 mm and weighing up to 5 tons. Rings can manifest in two main forms within the rotary kiln: 1) They adhere to the kiln, continuously accumulating and accumulating. In severe cases, they can block the kiln mouth and disrupt smooth production. 2) They aggregate into large clumps as the kiln rotates, causing them to flip with the kiln's movement. This movement can scratch the refractory materials, and in severe cases, damage them and cause severe vibration within the kiln body, reducing their service life and shortening the kiln's service life.

[0003] When ring formation is serious, the kiln needs to be stopped for manual ring removal, otherwise it will affect the availability of the rotary kiln equipment. Manual ringing includes the burning ring and collision ring method, the rapid cooling method and the mechanical ring cleaning. In the early stage of rotary kiln ring formation, due to the loose structure of the ring material, the low metal iron content and the 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 of material 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 rotary kiln ring formation, due to the dense ring material, high metal iron content and high ring hardness, the burning ring and collision ring method is ineffective, 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. The ring material causes greater damage to the refractory material of the kiln body during the rapid cooling process. At the same time, the cleaning of the ring material in the kiln is not thorough, and the ring cleaning quality is poor. For thin, uniform rings, mechanical ring cleaning involves attaching a scraper to a trolley mounted within a fixed frame. The scraper extends into the rotating kiln to scrape away the ringed material. For thick, uneven rings, cleaning requires the use of a small rock drill or jackhammer. This requires close proximity between on-site workers and the workstation, and the debris and dust generated during the cleaning process pose a safety risk. To prevent deformation of the machinery under high temperatures, current mechanical ring cleaning requires shutting down the kiln, typically requiring two days of cooling. This results in long downtime, high efficiency, and high cleaning costs, significantly impacting production. Furthermore, the thickness of rings varies around the circumference, and mechanical ring cleaning often requires the scraper to be adjusted to the ring thickness. When encountering uneven accumulation, the mechanical arm experiences excessive pressure, bending, and consequently deforming the trolley frame. Summary of the Invention

[0004] The technical task of the present invention is to address the deficiencies of the above existing technologies and provide an online cleaning device for rings in a rotary kiln, which can realize online cleaning of rings in the rotary kiln.

[0005] The invention also provides a technical solution for solving the technical problem of the invention as follows: an online cleaning device for ring formation in a rotary kiln, comprising a drill bit and a drill rod, characterized in that it also includes a guide bracket, a track, a movable assembly, a support assembly, a power assembly and a rear adjustment device; the front end of the track is provided with a guide bracket, the guide bracket comprises a frame and a guide plate with a through hole; the lower end of the frame is connected to the front end of the track, a slide is provided on the inner side, and both sides of the guide plate are embedded in the slide; a front adjustment device is provided between the guide plate and the frame; the drill rod passes through the through hole of the guide plate; the movable assembly comprises a moving trolley, a driving device and a locking mechanism; the moving trolley is slidably connected to the track, and the driving device provides power for the moving trolley; the locking mechanism comprises a base with a through hole, a door-shaped frame and a locking oil cylinder; the base is two, fixedly connected to both sides of the moving trolley, and the track is directly below the through hole; the door-shaped frame comprises a fixedly connected crossbeam and two locating pins, and the two ends of the locking oil cylinder are respectively connected to the middle section of the crossbeam and the moving trolley; the lower end of the locating pin passes through the through hole of the base; The support assembly is a support trolley with a bracket installed; the support trolley is slidably connected to the track, the bracket includes side plates and rollers, and the rollers are rotatably connected to the side plates through roller frames; there is a center adjustment device between the two ends of the roller frame and the side plates of the bracket; the power assembly includes a hydraulic system, a power cylinder and a hydraulic hammer; the hydraulic system is installed on the mobile trolley, and includes a hydraulic valve station, an oil tank, an oil pump, an electric motor and a control device; the power cylinder is installed on the mobile trolley and is connected to the hydraulic system oil circuit through a pipeline; the The two ends of the hydraulic hammer are respectively connected to the power cylinder and the drill rod; the rear adjustment device includes a sliding guide frame, an L-shaped slider with a pin hole and a guide rod; the sliding guide frame is fixedly connected to the mobile trolley, and a slot is provided on the inner side, and a plurality of pin holes are provided on the slot; the front end of the guide rod is connected to the rear end of the hydraulic hammer, and a connecting rod is provided at the front lower end, and the lower end of the connecting rod is connected to the pin shaft of the power cylinder; the side of the guide rod has a slide groove; the lower end of the L-shaped slider is inserted into the slot; the cylindrical inner end of the L-shaped slider is embedded in the slide groove of the guide rod.

[0006] Furthermore, the drill rod has a circulating water channel inside, through which cooling water circulates, and the water inlet and outlet are located at the rear end of the drill rod.

[0007] Furthermore, an oxygen blowing tube is provided in the drill head and the drill rod.

[0008] Furthermore, it also includes drag chains.

[0009] Furthermore, the front adjustment device has pin holes at corresponding positions of the guide plate and the frame, which are fixed by pins.

[0010] Furthermore, there is a clamping device between the through hole and the drill rod, and the clamping device is provided with a plurality of tightening rollers on the back side of the guide plate, and the tightening rollers are connected to the guide plate through the roller seat, and the roller surface is in contact with the guide plate.

[0011] Furthermore, the sliding connection between the moving trolley, the supporting trolley and the track is an embedded sliding connection.

[0012] Furthermore, the above-mentioned driving device is a double-drum winch.

[0013] Furthermore, a guide sleeve is provided on the base, and the lower end of the positioning pin passes through the guide sleeve and is inserted into the through hole.

[0014] Furthermore, the above-mentioned center adjustment device has pin holes at the positions corresponding to the side plates of the bracket at both ends of the roller frame, and is fixed by pins.

[0015] Compared with the prior art, the present invention has the following outstanding beneficial effects:

[0016] 1. It can clean the rings without stopping the rotary kiln and cooling the kiln, thus reducing the maintenance cost of cooling and cleaning the kiln and improving the availability of the rotary kiln equipment;

[0017] 2. No sudden cooling or extreme heating, which prolongs the service life of refractory materials. The service life of rotary kiln is extended from 30 days to 60 days, reducing equipment maintenance costs.

[0018] 3. Reduce the cost of cooling and cleaning the kiln, and reduce the consumption of manpower and equipment;

[0019] 4. It can be cleaned after combined adjustment according to the different hardness and forms of the rings, and can be adjusted according to the thickness to reduce the chance of damage to the cleaning device;

[0020] 5. Operators do not need to enter the kiln to work, avoiding safety risks during the cleaning process, such as falls, burns, and injuries. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a structural diagram of embodiment 1 of the present invention.

[0022] Figure 2 It is a schematic diagram of the front partial structure of Example 1 of the present invention.

[0023] Figure 3 It is a schematic diagram of the structure of the mobile assembly and power assembly of Example 1 of the present invention.

[0024] Figure 4 It is a structural schematic diagram of the post-adjustment device of Example 1 of the present invention.

[0025] Figure 5 It is a schematic diagram of the support assembly structure of Example 1 of the present invention.

[0026] Figure 6 It is a structural diagram of embodiment 2 of the present invention.

[0027] Figure 7 It is a schematic diagram of the guide bracket structure of Example 2 of the present invention.

[0028] Figure 8 It is a schematic diagram of the support assembly structure of Example 2 of the present invention.

[0029] Figure 9 This is a schematic diagram of the guide bracket structure of Example 3 of the present invention.

[0030] Figure 10 It is a schematic diagram of the support assembly structure of Example 2 of the present invention. DETAILED DESCRIPTION

[0031] The present invention will be further described below with reference to the accompanying drawings and detailed description. Hereinafter, only certain exemplary embodiments are briefly described. As will be appreciated by those skilled in the art, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and description are to be regarded as illustrative in nature and not restrictive.

[0032] In the following embodiments, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "fixed," etc. should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of the present invention based on specific circumstances.

[0033] In order to better describe the Figure 1It should be understood that the directions or positional relationships indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", "end", "side", etc. are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the embodiments of the present invention.

[0034] The present invention comprises a drill bit 1, a guide bracket 2, a drill rod 3, a track 4, a moving assembly 5, a supporting assembly 6, a power assembly 7 and a rear adjustment device 8.

[0035] like Figure 1-5 As shown, in Example 1, the drill bit 1 is installed at the front end of the drill rod 3 for cleaning the ring.

[0036] The drill rod 3 has a circulating water channel for circulating cooling water, and the water inlet 31 and the water outlet 32 ​​are located at the rear end of the drill rod 3. In the optimized solution, an oxygen blowing pipe is also provided in the drill bit 1 and the drill rod 3 to increase the temperature of the ring by blowing oxygen, thereby achieving the purpose of melting the ring.

[0037] In order to facilitate the movement and reeling of the water pipes and cables, a drag chain 9 is further provided in this embodiment for placing the cooling water pipes and cables.

[0038] The front end of the track 4 is provided with a guide bracket 2, which includes a frame 21 and a guide plate 22. The lower end of the frame 21 is connected to the front end of the track 4. The frame 21 has a slideway on its inner side, and the guide plate 22 is embedded in the slideway on both sides, allowing it to move up and down. A front adjustment device is provided between the guide plate 22 and the frame 21. The guide plate 22 has a through hole, and the drill rod 3 passes through the through hole. In this embodiment, the front adjustment device is a pin hole 23 at the corresponding position of the guide plate 22 and the frame 21, which is fixed at different heights by a pin.

[0039] In the optimized solution, the drill rod 3 is more than 20 meters long. In order to reduce wear, a clamping device is provided between the through hole and the drill rod 3. In this embodiment, the clamping device is a plurality of clamping rollers 24 provided on the back side of the guide plate 22. The clamping rollers 24 are connected to the guide plate 22 through a roller seat, and the roller surface is in rolling connection with the drill rod 3.

[0040] The track 4 can be an integrated track or a telescopic track, and the telescopic form can be a sleeve type telescopic or a slide type telescopic.

[0041] The moving assembly 5 includes a moving carriage 51 , a driving device 52 and a locking mechanism.

[0042] The moving trolley 51 is slidably connected to the track 4. In this embodiment, the sliding connection is an embedded sliding connection to ensure the stability between the moving trolley 51 and the track 4. Specifically, there is a slideway inside the track 4, and the running wheels of the moving trolley 51 roll in the slideway.

[0043] The driving device 52 provides power for the mobile trolley 51 to realize the movement of the mobile trolley 51. The driving device 52 can be a winch or a stepping motor, and the connection between the driving device 52 and the mobile trolley 51 can also be a rack and pinion transmission system. The positioning of the mobile trolley 51 can be achieved by means of track fixed point, motor fixed distance or rack and pinion limit. The driving device 52 in this embodiment is a double-drum winch. A double-drum winch is provided at the rear end of the track 4, and the double-drum winch provides power for the mobile trolley 51 to rotate forward and flip backward. The specific connection method depends on the winch model, and can be: the wire rope of one drum of the double-drum winch is connected to the rear end of the mobile trolley 51, and the wire rope of the other drum is connected to the front end of the mobile trolley 51 after being turned through the fixed pulley at the front of the track 4.

[0044] The locking mechanism includes a base 55, a door-shaped frame and a locking cylinder 56. There are two bases 55, which are fixedly connected on both sides of the mobile trolley 51. Each base 55 has a through hole, and the track 4 is directly below the through hole. The door-shaped frame includes a fixedly connected crossbeam 58 and two locating pins 53. The middle section of the crossbeam 58 is connected to the piston rod of the locking cylinder 56, and the bottom of the locking cylinder 56 is connected to the mobile trolley 51. The lower end of the locating pin 53 passes through the through hole of the base 55. In the optimized solution, a guide sleeve 54 is provided on the base 55, and the lower end of the locating pin 53 passes through the guide sleeve 54 and is inserted into the through hole. When the piston rod is retracted, the door-shaped frame is pressed down, and the locating pin 53 and the track 4 are pressed together to achieve locking. When the piston rod is extended, the door-shaped frame is lifted up and contact is locked. In order to increase the locking strength and reliability, a plurality of positioning holes 57 are opened at positions corresponding to the through holes of the rail 4 and the base 55 , and the lower ends of the positioning pins 53 are inserted into the positioning holes 57 to achieve firm locking.

[0045] The support assembly 6 is a support trolley 61. The support trolley 61 is slidably connected to the track 4. In the optimized solution, the sliding connection is an embedded sliding connection. A bracket is installed on the support trolley 61 for carrying the drill rod 3. The bracket includes a side plate 63 and a roller 62, and the roller 62 is rotatably connected to the side plate 63 through a roller frame 64. There is a center adjustment device between the two ends of the roller frame 64 and the side plate 63 of the bracket. In this embodiment, the center adjustment device is a pin hole at the corresponding position of the two ends of the roller frame 64 and the side plate 63 of the bracket, which is fixed at different heights by pins.

[0046] The power assembly 7 includes a hydraulic system, a power cylinder 72 and a hydraulic hammer 73 .

[0047] The hydraulic system is mounted on the mobile cart 51 and includes a hydraulic valve station 76, an oil tank 75, an oil pump 71, an electric motor 74, and a control device. The electric motor 74 provides mechanical energy to the hydraulic system; the oil pump 71 converts the mechanical energy provided by the electric motor 74 into the pressure energy of the oil, outputting high-pressure oil; and converts the pressure energy of the oil into mechanical energy to drive the actuators (the power cylinder 72, the locking cylinder 56, and the hydraulic hammer 73) to perform work. The hydraulic valve station 76 controls the pressure, flow rate, and flow direction of the oil from the hydraulic pump to the actuator, thereby controlling the force, speed, and direction of the actuator; and the oil tank 75 holds the hydraulic oil. The above structure represents existing technology, and the specific models and connection methods will not be repeated here.

[0048] The power cylinder 72 is mounted on the mobile trolley 51 and is connected to the hydraulic system oil circuit via a pipeline. The front end of the hydraulic rod of the power cylinder 72 is connected to the rear end of the hydraulic hammer 73 via a rear adjustment device 8. The front end of the hydraulic hammer 73 is connected to the rear end of the drill rod 3.

[0049] The rear adjustment device 8 includes a sliding guide frame 81 , an L-shaped slider 85 with a pin hole, and a guide rod 82 .

[0050] The sliding guide frame 81 is fixedly connected to the moving trolley 51. A slot 84 is provided on the inner side of the sliding guide frame 81, and a plurality of pin holes are provided on the slot 84.

[0051] The front end of the guide rod 82 is connected to the rear end of the hydraulic hammer 73. The front lower end of the guide rod 82 has a connecting rod 83. The lower end of the connecting rod 83 is pin-connected to the power cylinder 72. The side of the guide rod 82 has a slide groove.

[0052] The lower end of the L-shaped slider 85 is inserted into the slot 84, and the slider height can be adjusted by connecting different pin holes with a pin. The inner end of the L-shaped slider 85 is embedded in the guide rod 82. The inner end of the L-shaped slider 85 in the rear adjustment device is cylindrical, forming a rotational connection with the side slot of the guide rod 82, allowing the guide rod 82 to rotate around the slider.

[0053] The device of the present invention can realize online cleaning of rotary kiln rings. During the ring cleaning operation, the height adjustment of the drill rod 3, the cooperation of the double-drum winch and the locking mechanism are used to complete the cleaning cycle. The specific steps and methods are as follows:

[0054] (1) Before cleaning, clean the material in the rotary kiln through the rotary kiln to expose the ring, and estimate the distance from the kiln mouth and the thickness of the ring;

[0055] (2) Before starting the ring cleaning device, circulate cooling water inside the drill rod 3; and check the operating status of each component on the mobile trolley 51;

[0056] (3) The height of the drill rod 3 is adjusted by the front adjustment device, the middle adjustment device, and the rear adjustment device 8

[0057] (4) The movable carriage 51 is moved by the driving device 52 (double drum winch) to position the drill bit 1 at the working point;

[0058] (5) After reaching the designated looping position, the movable carriage 51 is positioned and locked by the locking mechanism;

[0059] (6) The power cylinder 72 drives the drill rod 3 to perform a large displacement reciprocating motion through the guide rod 82 to clean the ring with lower hardness;

[0060] (7) If the cleaning effect of the power cylinder 72 is not obvious, start the hydraulic hammer 73 to hammer and destroy the ring;

[0061] (8) For rings with high hardness and ineffective hydraulic hammer 73, the ring point temperature can be increased by blowing oxygen through the drill bit 1 and drill rod 3 to achieve the purpose of melting the ring.

[0062] In Example 1, the front adjustment device, the middle adjustment device, and the rear adjustment device are adjusted by predicting the looping situation, thereby achieving the lifting and lowering of the position of the drill rod 3 and changing the action point of the drill bit 1.

[0063] Example 2 is improved on the basis of Example 1, so that the position change of the drill rod 3 is more flexible and maneuverable.

[0064] like Figure 6-8 As shown, the front adjustment device of embodiment 2 is a front lifting cylinder 25. The two ends of the front lifting cylinder 25 are respectively connected to the middle end of the guide plate 22 and the bottom plate of the frame 21.

[0065] The middle adjustment device is a middle lifting oil cylinder 65. There is a positioning groove on the inner side of the side plate 63, and the two ends of the roller frame 64 slide in the positioning groove. There is a middle lifting oil cylinder 65 between the middle section of the roller frame 64 and the supporting trolley 61.

[0066] When the impact height needs to be temporarily adjusted, the front lifting cylinder and the middle lifting cylinder are driven to adjust the position of the drill rod 3.

[0067] Since impact dust may affect the service life of the front and middle lifting cylinders, Example 3 is improved on the basis of Example 1, and pins are no longer used to achieve height adjustment.

[0068] like Figure 9-10 As shown, the front adjustment device of Example 2 includes an electric hoist, which is installed at any position on the rear of the track 4 that does not affect the operation (so the specific positions of the electric hoist and the wire rope are not shown in the figure), and a steering pulley 26 is provided at the upper end of the frame 21, and the wire rope of the electric hoist is connected to the upper guide plate 22 via the steering pulley 26.

[0069] The central adjustment device has a positioning groove on the inner side of the side plate 63, and the two ends of the roller frame 64 slide in the positioning groove. A spring 66 is connected between the roller frame 64 and the supporting trolley 61. The elastic force resists the weight of the drill rod 3. The strength of the spring is related to the weight of the drill rod 3 and the number of supporting trolleys 61, ensuring that the drill rod 3 does not separate from the roller surface when the guide plate 22 is in a high position, and the drill rod 3 does not bend when the guide plate 22 is in a low position.

[0070] When the impact height needs to be temporarily adjusted, the guide plate 22 is actively and flexibly adjusted by the electric hoist, and the intermediate adjustment device is passively supported.

[0071] It should be noted that matters not described in detail in this embodiment are well-known technologies in the art.

[0072] It should be noted that the specific embodiments of the present invention have been described in detail. For those skilled in the art, various obvious changes to it without departing from the spirit and scope of the present invention are within the scope of protection of the present invention.

Claims

1. An online cleaning device for ring formation in a rotary kiln, comprising a drill bit and a drill rod, characterized in that: Material toggling mechanism, its both sides respectively have a cylinder pressure, and the cylinder pressure bar connects swing arm, and the swing arm end face has hook portion, and a bar passes position between the end of two swing arms and the hook portion. The cam is connected to the driving mechanism by step of rotating the transmission gear and rotating the transmission gear, and the cam is connected with the transmission gear of the transmission gear by the hydraulic cylinder to move the transmission gear and the transmission gear of the transmission gear.

2. The online cleaning device for ring formation in a rotary kiln according to claim 1, characterized in that: A circulating water channel is provided in the drill rod, through which circulating cooling water flows, and a water inlet and a water outlet are located at the rear end of the drill rod.

3. The online cleaning device for ring formation in a rotary kiln according to claim 1, characterized in that: An oxygen blowing tube is arranged in the drill bit and the drill rod.

4. The online cleaning device for ring formation in a rotary kiln according to claim 2, characterized in that: Also includes drag chains.

5. The online cleaning device for ring formation in a rotary kiln according to claim 1, characterized in that: The front adjustment device is provided with pin holes at corresponding positions of the guide plate and the frame, and is fixed by pins.

6. The online cleaning device for ring formation in a rotary kiln according to claim 1, characterized in that: A clamping device is provided between the through hole and the drill rod. The clamping device is a plurality of tightening rollers provided on the back side of the guide plate. The tightening rollers are connected to the guide plate through roller seats, and the roller surfaces are rollingly connected to the drill rod.

7. The online cleaning device for ring formation in a rotary kiln according to claim 1, characterized in that: The sliding connection between the moving trolley, the supporting trolley and the track is an embedded sliding connection.

8. The online cleaning device for ring formation in a rotary kiln according to claim 1, characterized in that: The driving device is a double-drum winch.

9. The online cleaning device for ring formation in a rotary kiln according to claim 1, characterized in that: A guide sleeve is provided on the base, and the lower end of the positioning pin passes through the guide sleeve and is inserted into the through hole.

10. The online cleaning device for ring formation in a rotary kiln according to claim 1, characterized in that: The center adjustment device is provided with pin holes at positions corresponding to the side plates of the bracket at both ends of the roller frame, and is fixed by pins.

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