Trackless automatic advancing and retreating device for pellet rotary kiln plasma ignition coal gun

Abstract

The utility model relates to the technical field of rotary kilns, in particular to a trackless automatic advancing and retreating device for a pellet rotary kiln plasma ignition coal gun, which comprises a plasma ignition coal gun and an auxiliary structure. A control motor drives a center shaft to rotate through a linkage piece, a first outer gear ring of the center shaft drives a plurality of first gears to rotate, the first gears move in the circumferential direction of teeth on one side of a double-gear ring, and the first gears drive a gear frame to rotate along the center shaft while rotating along the gear frame; a second outer gear ring of the gear frame drives a plurality of second gears to rotate, the second gears move in the circumferential direction of the double-gear ring, the second gears drive the riding wheels to rotate, the large transmission ratio is achieved, the plasma ignition coal guns are driven by the riding wheels to move and stretch into the kiln head cover for ignition operation, and after kiln drying is finished, the motor is controlled to rotate reversely; and the plasma ignition coal gun retreats from the kiln head cover.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary kilns, in particular to a trackless automatic advance and retreat device for a plasma ignition coal gun of a pelletizing rotary kiln. Background Art

[0002] At present, most pelletizing rotary kilns have abandoned diesel ignition and adopted energy-saving and environmentally friendly plasma arc thermal cracking technology to directly ignite coal powder for heating. The plasma ignition device is equipped with a special ignition coal gun (i.e. plasma coal powder burner). In order to meet the process requirements of ignition heating and kiln drying, and to be able to smoothly connect with normal production, the plasma ignition coal gun must be installed as close as possible to the multi-channel coal powder burner used for production.

[0003] However, the existing multi-channel burner floor rails in pelletizing rotary kilns occupy part of the space below the plasma ignition lances, making it impossible to equip them with independent floor rails. Furthermore, the distance between the lances and the heat recovery air duct above is small, making it impossible to install a ceiling rail. Therefore, the plasma lances must be fixed, making it impossible to move them and remove them from the kiln hood. After the rotary kiln heats up and enters normal production, the plasma ignition lances stop operating, but the front of the lances remains exposed to temperatures of 1000-1100°C within the hood, requiring cooling air to prevent burns. Whether this is done by drawing air from the kiln hood combustion air duct or by using a separate cooling fan, this increases power consumption. Furthermore, the introduction of cold air into the kiln also increases coal consumption. Furthermore, insufficient cooling can cause the lance tips to burn, resulting in significant economic losses. Utility Model Content

[0004] The utility model aims to solve the problem that the plasma ignition coal gun cannot be withdrawn from the kiln head cover, and proposes a trackless automatic advance and retreat device for the plasma ignition coal gun of a pelletizing rotary kiln.

[0005] To achieve the above purpose, the present invention provides the following technical solutions:

[0006] A trackless automatic advance and retreat device for a plasma ignition coal gun of a pelletizing rotary kiln is designed, comprising a plasma ignition coal gun and an auxiliary structure. The middle section of the plasma ignition coal gun is provided with an auxiliary structure, wherein the auxiliary structure may further comprise a support assembly and a guide assembly, wherein the support assembly is provided on one side of the middle portion of the plasma ignition coal gun, and the guide assembly is provided on the other side of the middle portion of the plasma ignition coal gun.

[0007] Preferably, the support assembly includes a support frame, a guide seat, a connecting frame and a fixing module;

[0008] A plurality of guide seats are provided on one side of the support frame, and the guide seats on both sides are distributed in a mirror image;

[0009] The ends of the guide seats on both sides are fixedly connected to the connecting frame. A fixing module is provided in the middle of the connecting frame for fixing the plasma ignition coal gun on the connecting frame.

[0010] Preferably, a plurality of guide grooves are provided on one side of the support frame adjacent to the connecting frame, and the guide grooves on both sides are distributed in a mirror image manner.

[0011] Preferably, the shape of the guide seat is the same as that of the guide groove, and the guide seat can match the guide groove;

[0012] A plurality of pulleys are rotatably provided on both sides of the guide seat, and the outer walls of the pulleys are fitted with the two ends of the guide groove.

[0013] Preferably, one end of the support frame is fixed to the hot air support beam of the pelletizing rotary kiln, and the other end of the support frame is fixed to the side panel of the hot air duct of the pelletizing rotary kiln.

[0014] Preferably, the guide assembly includes a support seat, a central shaft, a stop sleeve, a connecting seat, a first gear, a double gear ring, a gear rack, a second gear, a fixed shell, a supporting wheel and a driving module;

[0015] A central shaft is rotatably provided in the middle of the support seat, and one side of the central shaft is rotatably connected to the connecting seat;

[0016] A stop sleeve is provided on one side of the connecting seat, and one end of the stop sleeve is fixedly provided on the supporting seat;

[0017] The outer side of one end of the connecting seat is fixedly connected to the fixed shell, and the inner wall of the fixed shell is fixedly connected to the double gear ring;

[0018] A plurality of first gears are provided on one side of the central shaft adjacent to the connecting seat, and the outer walls of the plurality of first gears are all meshed with the teeth on one side of the double gear ring;

[0019] The shafts of the plurality of first gears are all rotatably connected to the gear rack, and the inner wall of the gear rack is rotatably connected to the central axis;

[0020] A plurality of second gears are provided on one side of the outer wall of the gear rack, and the outer walls of the plurality of second gears are all meshed with the teeth on the other side of the double gear ring;

[0021] The outer walls of the shafts of the plurality of second gears are rotatably connected to the supporting wheels, and the middle portions of the supporting wheels are rotatably connected to the central shaft;

[0022] One side of the supporting wheel is rotatably connected to the central shaft, and the other side of the supporting wheel is rotatably connected to the connecting seat;

[0023] A driving module is provided at one end of the central shaft.

[0024] Preferably, a first outer gear ring is provided on an outer wall of one side of the central shaft adjacent to the connecting seat, and an outer wall of the first outer gear ring is engaged with a plurality of first gears;

[0025] A second outer gear ring is provided on a side of the gear rack away from the first gear, and the outer wall of the second outer gear ring is meshed with a plurality of second gears;

[0026] The end of the support seat is welded with a kiln head burner platform.

[0027] Preferably, a spline is provided on a side of the connecting seat adjacent to the supporting seat, and a spline groove is provided on a side of the stopping sleeve adjacent to the central axis;

[0028] The spline of the connecting seat matches the spline groove of the stop sleeve to limit the rotation of the connecting seat;

[0029] The outer side of the supporting wheel is an arc surface, and the generatrix arc diameter of the supporting wheel is the same as the outer diameter of one side of the plasma ignition coal gun.

[0030] Preferably, the driving module includes a motor and a linkage;

[0031] One side of the linkage member is connected to the central shaft, the other side of the linkage member is connected to the motor, and the fixed end of the motor is fixedly connected to the support seat.

[0032] The utility model proposes a trackless automatic advance and retreat device for a plasma ignition coal gun of a pelletizing rotary kiln, which has the beneficial effects of: by controlling the motor to drive the central shaft to rotate through a linkage, the first outer gear ring of the central shaft drives multiple first gears to rotate, the first gear moves circumferentially along the teeth of one side of the double gear ring, the first gear rotates along the gear rack while the first gear drives the gear rack to rotate along the central shaft, the second outer gear ring of the gear rack drives multiple second gears to rotate, the second gear moves circumferentially along the double gear ring, and the second gear drives the supporting wheel to rotate, thereby achieving a large transmission ratio, and the supporting wheel drives the plasma ignition coal gun to move and extend into the kiln head cover for ignition operation. After the kiln baking is completed, the motor is controlled to rotate in the opposite direction, so that the plasma ignition coal gun exits the kiln head cover, which can reduce the entry of cold air into the kiln and avoid burning of the coal gun. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the structure of the utility model;

[0034] Figure 2 This is a schematic structural diagram of the guide assembly of the present utility model;

[0035] Figure 3 This is a schematic diagram of the structural decomposition of the guide assembly of the present invention;

[0036] Figure 4It is a partial cross-sectional schematic diagram of the guide assembly of the present utility model;

[0037] Figure 5 This is a schematic structural diagram of the support assembly of the present utility model;

[0038] Figure 6 This is an exploded view of the support assembly of the present invention;

[0039] Figure 7 It is a partial cross-sectional view of the support assembly of the present utility model.

[0040] In the figure: 1. plasma ignition coal gun; 2. support assembly; 201. support frame; 2011. guide groove; 202. guide seat; 2021. pulley; 203. connecting frame; 2031. guide groove; 204. fixing module; 2041. screw; 2042. connecting plate; 2043. fixing plate; 2044. spring; 2045. slider; 3. guide assembly; 301. support seat; 302. center shaft; 3021. first outer gear ring; 303. stop sleeve; 304. connecting seat; 3041. spline; 305. first gear; 306. double gear ring; 307. gear frame; 3071. second outer gear ring; 308. second gear; 309. fixing shell; 310. supporting roller; 311. drive module; 3111. motor; 3112. linkage part. DETAILED DESCRIPTION

[0041] The present invention will be further described below with reference to the accompanying drawings:

[0042] This embodiment Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 and Figure 7 As shown, a trackless automatic advance and retreat device for a plasma ignition coal gun 1 of a pelletizing rotary kiln includes a plasma ignition coal gun 1 and an auxiliary structure. The middle section of the plasma ignition coal gun 1 is provided with an auxiliary structure, wherein the auxiliary structure may further include a support assembly 2 and a guide assembly 3. The support assembly 2 is provided on one side of the middle portion of the plasma ignition coal gun 1, and the guide assembly 3 is provided on the other side of the middle portion of the plasma ignition coal gun 1.

[0043] The support assembly 2 includes a support frame 201, a guide seat 202, a connecting frame 203 and a fixing module 204. A plurality of guide seats 202 are provided on one side of the support frame 201, and the guide seats 202 on both sides are mirror-imaged. The ends of the guide seats 202 on both sides are fixedly connected to the connecting frame 203. A fixing module 204 is provided in the middle of the connecting frame 203 for fixing the plasma ignition coal gun 1 on the connecting frame 203. When the plasma ignition coal gun 1 is fixed and moves with the support wheel 310, the plasma ignition The coal gun 1 drives the connecting frame 203 to move through the fixing module 204, and the connecting frame 203 drives the guide seat 202 to move along the guide groove 2011. The friction between the guide seat 202 and the guide groove 2011 causes the pulley 2021 to rotate. The rolling friction between the pulley 2021 and the guide groove 2011 replaces the sliding friction between the guide seat 202 and the guide groove 2011, making the plasma ignition coal gun 1 move more smoothly and reducing the wear between the guide seat 202 and the guide groove 2011.

[0044] A plurality of guide grooves 2011 are provided on one side of the support frame 201 adjacent to the connecting frame 203, and the guide grooves 2011 on both sides are distributed in a mirror image. The shape of the guide seat 202 is the same as that of the guide groove 2011, and the guide seat 202 can match the guide groove 2011. A plurality of pulleys 2021 are rotatably provided on both sides of the guide seat 202, and the outer wall of the pulley 2021 fits with the two ends of the guide groove 2011. One end of the support frame 201 is fixed on the hot air to support beam of the pelletizing rotary kiln, and the other end of the support frame 201 is fixed on the side panel of the hot air duct of the pelletizing rotary kiln.

[0045] like Figure 5 、 Figure 6 and Figure 7 As shown, the fixing module 204 includes a screw 2041, a connecting plate 2042, a fixing plate 2043, a spring 2044 and a slider 2045;

[0046] Both ends of the connecting plate 2042 are fixedly connected to the connecting frame 203, the middle part of the connecting plate 2042 is threadedly connected to the screw 2041, the end of the screw 2041 is rotatably connected to the fixed plate 2043, the two ends of the fixed plate 2043 are fixedly connected to multiple sliders 2045, the two ends of the spring 2044 are respectively fixedly connected to the slider 2045 and the connecting frame 203, a plurality of guide grooves 2031 are provided on both sides of the connecting frame 203, the guide grooves 2031 match the sliders 2045, the screw 2041 is rotated to move along the threaded groove of the connecting plate 2042, and the screw 2041 rotates along the fixed plate 2043, and the screw 2041 drives the fixed plate 2043 to move, and the fixed plate 2043 is brought The movable slider 2045 moves along the guide groove 2031, and the slider 2045 drives the spring 2044 to deform, so that the fixed plate 2043 moves and fits tightly with the plasma ignition coal gun 1, and a rubber pad is provided between the contact surface of the fixed plate 2043 and the connecting frame 203 and the plasma ignition coal gun 1 to reduce the hard contact between the plasma ignition coal gun 1 and increase the friction between the fixed plate 2043 and the connecting frame 203 and the plasma ignition coal gun 1. By rotating the screw 2041, the fixed plate 2043 is driven to move away from the plasma ignition coal gun 1, so that the plasma ignition coal gun 1 can be disassembled. This method replaces the traditional installation method, making it more convenient to disassemble the plasma ignition coal gun 1.

[0047] The guide assembly 3 includes a support seat 301, a central shaft 302, a stopping sleeve 303, a connecting seat 304, a first gear 305, a double gear ring 306, a gear frame 307, a second gear 308, a fixed shell 309, a supporting wheel 310 and a driving module 311. The central shaft 302 is rotatably provided in the middle of the support seat 301, one side of the central shaft 302 is rotatably connected to the connecting seat 304, a stopping sleeve 303 is provided on one side of the connecting seat 304, one end of the stopping sleeve 303 is fixedly provided on the support seat 301, the outer side of one end of the connecting seat 304 is fixedly connected to the fixed shell 309, the inner wall of the fixed shell 309 is fixedly connected to the double gear ring 306, and a plurality of first gears are provided on one side of the central shaft 302 adjacent to the connecting seat 304. Wheel 305, the outer walls of multiple first gears 305 are engaged with the teeth on one side of the double gear ring 306, the shafts of all multiple first gears 305 are rotatably connected to the gear rack 307, the inner wall of the gear rack 307 is rotatably connected to the central shaft 302, and multiple second gears 308 are provided on one side of the outer wall of the gear rack 307, the outer walls of multiple second gears 308 are engaged with the teeth on the other side of the double gear ring 306, the outer walls of the shafts of multiple second gears 308 are rotatably connected to the supporting wheel 310, the middle part of the supporting wheel 310 is rotatably connected to the central shaft 302, one side of the supporting wheel 310 is rotatably connected to the central shaft 302, the other side of the supporting wheel 310 is rotatably connected to the connecting seat 304, and a driving module 311 is provided at one end of the central shaft 302.

[0048] The first outer gear ring 3021 is provided on the outer wall of one side of the central shaft 302 adjacent to the connecting seat 304. The first outer gear ring 3021 of the central shaft 302 drives the plurality of first gears 305 to rotate. The first gear 305 moves circumferentially along the teeth of one side of the double gear ring 306. The first gear 305 rotates along the gear rack 307. At the same time, the first gear 305 drives the gear rack 307 to rotate along the central shaft 302. The second outer gear ring 3071 of the gear rack 307 drives the plurality of second gears 308 to rotate. 308 moves circumferentially along the double gear ring 306, and the second gear 308 drives the supporting wheel 310 to rotate and achieve a large transmission ratio. The outer wall of the first outer gear ring 3021 is meshed with multiple first gears 305. The gear frame 307 is provided with a second outer gear ring 3071 on the side away from the first gear 305. The outer walls of the second outer gear ring 3071 are meshed with multiple second gears 308. The end of the support base 301 is welded to the kiln head burner platform, and the side of the connecting base 304 adjacent to the support base 301 is provided with a spline. 3041, a spline 3041 groove is provided on one side of the stop sleeve 303 adjacent to the central axis 302, the spline 3041 of the connecting seat 304 matches the spline 3041 groove of the stop sleeve 303, and is used to limit the rotation of the connecting seat 304, the outer side of the supporting wheel 310 is an arc surface, and the busbar arc diameter of the supporting wheel 310 is the same as the outer diameter of one side of the plasma ignition coal gun 1, the driving module 311 includes a motor 3111 and a linkage 3112, one side of the linkage 3112 is connected to the central axis 302, and the linkage The other side of the moving part 3112 is connected to the motor 3111, and the fixed end of the motor 3111 is fixedly connected to the support seat 301. The linkage part 31112 can be a chain sprocket linkage part or a belt pulley linkage part. The motor 3111 drives the central shaft 302 to rotate through the linkage part 31112, and the central shaft 302 rotates along the support seat 301. A groove is provided on the outer surface of the middle part of the outer wall of the supporting wheel 310 to increase friction, so that the plasma ignition coal gun 1 is driven to move during the rotation of the supporting wheel 310.

[0049] Specifically, when the plasma ignition coal gun 1 moves forward and backward, the control motor 3111 drives the central shaft 302 to rotate through the linkage 3112, and the first outer gear ring 3021 of the central shaft 302 drives the multiple first gears 305 to rotate. The first gear 305 moves circumferentially along the teeth of one side of the double gear ring 306. At the same time, the first gear 305 rotates along the gear rack 307, and the first gear 305 drives the gear rack 307 to rotate along the central shaft 302. The second outer gear ring 3071 of the gear rack 307 drives the multiple second gears 308 to rotate. The wheel 308 moves circumferentially along the double-toothed ring 306, and the second gear 308 drives the supporting wheel 310 to rotate, thereby achieving a large transmission ratio. The supporting wheel 310 drives the plasma ignition coal gun 1 to move and extend into the kiln head cover for ignition operation. After the kiln is baked, the motor 3111 is controlled to rotate in the opposite direction, so that the plasma ignition coal gun 1 exits the kiln head cover, which can reduce the cold air entering the kiln and avoid the coal gun from burning. The device does not require laying ground rails or hanging cabinets, occupies a small space, and is driven by the forward and reverse rotation of the motor, which is easy to operate and solves the problem of the advance and retreat of the plasma ignition burner.

[0050] While the present invention has been shown and described with reference to preferred embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein within the scope of the claims.

Claims

1. A trackless automatic advance and retreat device for a plasma ignition coal gun in a pelletizing rotary kiln, characterized by: It includes a plasma ignition coal gun and an auxiliary structure. The middle section of the plasma ignition coal gun is provided with an auxiliary structure, wherein the auxiliary structure can also include a supporting assembly and a guiding assembly. The supporting assembly is arranged on one side of the middle part of the plasma ignition coal gun, and the guiding assembly is arranged on the other side of the middle part of the plasma ignition coal gun.

2. The trackless automatic advance and retreat device for a plasma ignition coal gun of a pelletizing rotary kiln according to claim 1, characterized in that: The support assembly includes a support frame, a guide seat, a connecting frame and a fixing module; A plurality of guide seats are provided on one side of the support frame, and the guide seats on both sides are distributed in a mirror image; The ends of the guide seats on both sides are fixedly connected to the connecting frame. A fixing module is provided in the middle of the connecting frame for fixing the plasma ignition coal gun on the connecting frame.

3. The trackless automatic advance and retreat device for a plasma ignition coal gun of a pelletizing rotary kiln according to claim 2, characterized in that: A plurality of guide grooves are provided on one side of the support frame adjacent to the connecting frame, and the guide grooves on both sides are distributed in a mirror image manner.

4. The trackless automatic advance and retreat device for a plasma ignition coal gun of a pelletizing rotary kiln according to claim 2, characterized in that: The shape of the guide seat is the same as that of the guide groove, and the guide seat can match the guide groove; A plurality of pulleys are rotatably provided on both sides of the guide seat, and the outer walls of the pulleys are fitted with the two ends of the guide groove.

5. The trackless automatic advance and retreat device for a plasma ignition coal gun of a pelletizing rotary kiln according to claim 2, characterized in that: One end of the support frame is fixed on the hot air support beam of the pelletizing rotary kiln, and the other end of the support frame is fixed on the side plate of the hot air duct of the pelletizing rotary kiln.

6. The trackless automatic advance and retreat device for a plasma ignition coal gun of a pelletizing rotary kiln according to claim 1, characterized in that: The guide assembly includes a support seat, a central shaft, a stop sleeve, a connecting seat, a first gear, a double gear ring, a gear rack, a second gear, a fixed shell, a supporting wheel and a driving module; A central shaft is rotatably provided in the middle of the support seat, and one side of the central shaft is rotatably connected to the connecting seat; A stop sleeve is provided on one side of the connecting seat, and one end of the stop sleeve is fixedly provided on the supporting seat; The outer side of one end of the connecting seat is fixedly connected to the fixed shell, and the inner wall of the fixed shell is fixedly connected to the double gear ring; A plurality of first gears are provided on one side of the central shaft adjacent to the connecting seat, and the outer walls of the plurality of first gears are all meshed with the teeth on one side of the double gear ring; The shafts of the plurality of first gears are all rotatably connected to the gear rack, and the inner wall of the gear rack is rotatably connected to the central axis; A plurality of second gears are provided on one side of the outer wall of the gear rack, and the outer walls of the plurality of second gears are all meshed with the teeth on the other side of the double gear ring; The outer walls of the shafts of the plurality of second gears are rotatably connected to the supporting wheels, and the middle portions of the supporting wheels are rotatably connected to the central shaft; One side of the supporting wheel is rotatably connected to the central shaft, and the other side of the supporting wheel is rotatably connected to the connecting seat; A driving module is provided at one end of the central shaft.

7. The trackless automatic advance and retreat device for a plasma ignition coal gun of a pelletizing rotary kiln according to claim 6, characterized in that: A first outer gear ring is provided on an outer wall of one side of the central shaft adjacent to the connecting seat, and an outer wall of the first outer gear ring is meshed with a plurality of first gears; A second outer gear ring is provided on a side of the gear rack away from the first gear, and the outer wall of the second outer gear ring is meshed with a plurality of second gears; The end of the support seat is welded with a kiln head burner platform.

8. The trackless automatic advance and retreat device for a plasma ignition coal gun of a pelletizing rotary kiln according to claim 6, characterized in that: A spline is provided on one side of the connecting seat adjacent to the supporting seat, and a spline groove is provided on one side of the stopping sleeve adjacent to the central axis; The spline of the connecting seat matches the spline groove of the stop sleeve to limit the rotation of the connecting seat; The outer side of the supporting wheel is an arc surface, and the generatrix arc diameter of the supporting wheel is the same as the outer diameter of one side of the plasma ignition coal gun.

9. The trackless automatic advance and retreat device for a plasma ignition coal gun of a pelletizing rotary kiln according to claim 6, characterized in that: The driving module includes a motor and a linkage; One side of the linkage member is connected to the central shaft, the other side of the linkage member is connected to the motor, and the fixed end of the motor is fixedly connected to the support seat.

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