Feeding device of rotary kiln

Abstract

The utility model discloses a rotary kiln feeding device which comprises a feeding hopper, the bottom of the feeding hopper is communicated with a longitudinally-arranged blanking groove, the bottom of the blanking groove is communicated with a material sliding groove which is obliquely arranged, the bottom end of the material sliding groove is used for being inserted into a rotary kiln, an upper gate valve and a lower gate valve are horizontally arranged on the blanking groove, and the lower gate valve is located below the upper gate valve. A crushing mechanism which is positioned between the upper gate valve and the lower gate valve and is used for crushing materials is arranged in the blanking groove; a stirring mechanism which is positioned at the bottom of the blanking groove and is used for stirring crushed materials to prevent blockage is arranged below the lower gate valve; and a material pushing mechanism used for pushing the crushed materials falling from the material falling groove into the rotary kiln is arranged in the material sliding groove. According to the blanking device, the problem of material blockage in the blanking process can be effectively avoided, so that the blanking efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary kilns, and particularly relates to a feeding device for a rotary kiln. Background Art

[0002] A rotary kiln consists of processes such as gas flow, fuel combustion, heat transfer, and material movement. A rotary kiln is a device that enables fuel to burn fully, the heat from fuel combustion to be effectively transferred to the material, and the material to undergo a series of physical and chemical changes after receiving heat, finally forming finished clinker. When the rotary kiln is working, auxiliary equipment is required, such as a feeding device for the rotary kiln.

[0003] During the use of the existing feeding device for a rotary kiln, it usually includes a blanking process and a pushing process. However, during the blanking process, material blockage often occurs, thus affecting the blanking. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a feeding device for a rotary kiln to solve the problems raised in the background art.

[0005] To solve the above technical problems, the technical solutions adopted by the utility model are as follows.

[0006] A feeding device for a rotary kiln includes a feeding hopper. The bottom of the feeding hopper is connected to a vertically arranged blanking chute. The bottom of the blanking chute is connected to a chute that is inclined and whose bottom end is used to insert into the rotary kiln. Among them, an upper slide valve and a lower slide valve located below the upper slide valve are horizontally arranged on the blanking chute. A crushing mechanism for crushing materials is arranged between the upper slide valve and the lower slide valve in the blanking chute; a stirring mechanism for stirring the crushed materials to prevent blockage is arranged below the lower slide valve at the bottom of the blanking chute; a pushing mechanism for pushing the crushed materials falling from the blanking chute into the rotary kiln is arranged in the chute.

[0007] Preferably, the crushing mechanism includes two crushing rollers arranged side by side along the horizontal direction and respectively rotatably connected to the front chute plate and the rear chute plate of the blanking chute. The rear ends of the two crushing rollers both penetrate through the rear chute plate of the blanking chute and are connected through a transmission assembly. The rear end of one crushing roller is connected to a crushing motor arranged on the rear chute plate of the blanking chute and used to drive the two crushing rollers to rotate synchronously through the transmission assembly; the crushing mechanism further includes tooth blocks arranged on the inner walls of the blanking chute on the left and right sides of the two crushing rollers and used to cooperate with the crushing rollers.

[0008] Preferably, the stirring mechanism includes a rotating shaft horizontally and rotatably arranged at the bottom of the blanking chute, with one end passing through the blanking chute and being hermetically assembled with the blanking chute. A plurality of stirring rods vertically arranged upward with pointed tops are spaced along the length direction of the rotating shaft. A driven gear is arranged at the passing-out end of the rotating shaft. A stirring motor is arranged on the outer side wall of the blanking chute, and a driving gear meshing with the driven gear is arranged on the rotating shaft of the stirring motor.

[0009] Preferably, the pushing mechanism includes a telescopic cylinder arranged at the top of the chute. The telescopic rod of the telescopic cylinder is arranged in the chute and connected with a push head slidably arranged in the chute. The front end face of the push head is an inclined surface with the bottom end forward and the top end backward.

[0010] Preferably, a longitudinal cleaning scraper is penetrated through a part of the upper trough plate at the top of the chute near the blanking chute, and the bottom end of the cleaning scraper is used to abut against the top surface of the push head to scrape off the materials on the push head.

[0011] Preferably, a cooling jacket is sleeved on the bottom of the chute and is located outside the rotary kiln for cooling the connection part between the chute and the rotary kiln.

[0012] Preferably, the bottom end of the chute is hinged with an end cover located in the rotary kiln, which is used to cover the outlet of the chute under its own gravity to prevent the flue gas in the rotary kiln from entering the chute.

[0013] Preferably, a plurality of layers of buffer blocks are arranged along the circumferential direction on the inner wall of the feed hopper to slow down the sliding speed of the materials to prevent the materials from being blocked due to excessive aggregation at the bottom in the feed hopper.

[0014] Due to the adoption of the above technical solutions, the technical progress obtained by the present utility model is as follows.

[0015] By arranging the crushing mechanism, the stirring mechanism and the buffer blocks, the present utility model can effectively avoid the problem of material blockage during the blanking process, thereby improving the blanking efficiency. At the same time, with the setting of the crushing mechanism, the full combustion of the materials in the later stage can be ensured, and resources can be saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic structural diagram of the present utility model.

[0017] Wherein: 1. Feed hopper, 2. Blanking chute, 3. Chute, 4. Upper plug valve, 5. Lower plug valve, 6. Crushing mechanism, 61. Crushing roller, 62. Tooth block, 7. Stirring mechanism, 71. Rotating shaft, 72. Stirring rod, 73. Driven gear, 74. Driving gear, 75. Stirring motor, 8. Pushing mechanism, 81. Telescopic cylinder, 82. Push head, 9. Cleaning scraper, 10. Cooling jacket, 11. End cover, 12. Buffer block. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The present utility model will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] A rotary kiln feeding device, as shown in Figure 1 the figure, includes a feed hopper 1. The bottom of the feed hopper 1 is communicated with a longitudinally arranged blanking chute 2. The bottom of the blanking chute 2 is communicated with an inclined chute 3. The bottom end of the chute 3 is used to insert into the rotary kiln, so as to be communicated with the rotary kiln.

[0020] The feed hopper 1 is used to feed materials into the blanking chute 2. A plurality of layers of buffer blocks 12 are arranged along the circumferential direction on the inner wall of the feed hopper 1. The buffer blocks 12 are inclined structures facing downwards, which are used to slow down the sliding speed of the materials, so as to prevent the materials from being blocked in the feed hopper 1 due to excessive aggregation towards the bottom.

[0021] An upper slide valve 4 and a lower slide valve 5 are horizontally arranged on the blanking chute 2. The lower slide valve 5 is located below the upper slide valve 4. The upper slide valve 4 and the lower slide valve 5 are used to control the on-off of the blanking chute 2 at two positions.

[0022] A crushing mechanism 6 is arranged in the blanking chute 2. The crushing mechanism 6 is located between the upper slide valve 4 and the lower slide valve 5. The crushing mechanism 6 is used to crush the materials. During the crushing process, both the upper slide valve 4 and the lower slide valve 5 are closed, so as to avoid dust pollution of the air during the crushing process. Specifically, the crushing mechanism 6 includes two crushing rollers 61. The two crushing rollers 61 are arranged side by side in the horizontal direction and are respectively rotatably connected to the front and rear groove plates of the blanking chute 2. The rear ends of the two crushing rollers 61 both penetrate through the rear groove plate of the blanking chute 2 and are connected by a transmission component. The transmission component is a prior art, and its specific structure will not be described in detail here. The rear end of one crushing roller 61 is connected with a crushing motor. The crushing motor is arranged on the rear groove plate of the blanking chute 2. The crushing motor is used to drive the two crushing rollers 61 to rotate synchronously through the transmission component, so as to drive the crushing rollers 61 to crush the materials, which can not only avoid blockage caused by too large materials during the blanking process, but also be beneficial to the full combustion of the materials in the later stage. The crushing mechanism 6 further includes tooth blocks 62. The tooth blocks 62 are arranged on the inner walls of the blanking chute 2 on the left and right sides of the two crushing rollers 61. The tooth blocks 62 are used to cooperate with the crushing rollers 61 to realize the crushing of the materials.

[0023] A stirring mechanism 7 is arranged below the lower plug valve 5. The stirring mechanism 7 is located at the bottom of the blanking chute 2 and is used to stir the crushed materials, so as to prevent the crushed materials from clogging at the bottom of the blanking chute 2. And during the process of the crushed materials falling and being stirred after crushing, the upper plug valve 4 is closed and the lower plug valve 5 is opened to avoid dust pollution of the air. Specifically, the stirring mechanism 7 includes a rotating shaft 71. The rotating shaft 71 is horizontally and rotatably arranged at the bottom of the blanking chute 2, and one end of the rotating shaft 71 penetrates out of the blanking chute 2 and is hermetically assembled with the blanking chute 2; a plurality of vertically upward stirring rods 72 are arranged at intervals along the length direction of the rotating shaft 71 on the rotating shaft 71, and the top of the stirring rod 72 is pointed; a driven gear 73 is arranged at the penetrating end of the rotating shaft 71. A stirring motor 75 is arranged on the outer side wall of the blanking chute 2, and a driving gear 74 is arranged on the rotating shaft of the stirring motor 75. The driving gear 74 meshes with the driven gear 73. When the crushed materials fall, the rotating shaft 71 is driven by the stirring motor 75 to rotate reciprocally at a certain angle, so that the stirring rods 72 swing reciprocally at a certain angle to stir the falling crushed materials, thereby preventing the crushed materials from clogging at the bottom of the blanking chute 2.

[0024] The crushed materials falling from the blanking chute 2 directly fall into the chute 3. Under the action of the inclined arrangement of the chute 3, some materials will fall into the rotary kiln. In order to ensure that the chute 3 effectively and completely falls into the rotary kiln, a pushing mechanism 8 is arranged in the chute 3. The pushing mechanism 8 is used to push the crushed materials falling from the blanking chute 2 into the rotary kiln. Specifically, the pushing mechanism 8 includes a telescopic cylinder 81. The telescopic cylinder 81 is arranged on the top of the chute 3. The telescopic rod of the telescopic cylinder 81 is arranged in the chute 3 and is connected with a pushing head 82. The pushing head 82 is slidably arranged in the chute 3, and the front end face of the pushing head 82 is an inclined surface with the bottom end forward and the top end backward. When all the crushed materials fall into the chute 3, the telescopic cylinder 81 drives the pushing head 82 to push forward, so as to push all the materials into the rotary kiln.

[0025] A longitudinal cleaning scraper 9 is penetrated through a part of the upper trough plate at the top of the chute 3 close to the blanking chute 2. The bottom end of the cleaning scraper 9 is used to abut against the top surface of the pushing head 82, so as to scrape off the materials on the pushing head 82 when the telescopic cylinder 81 pulls back the pushing head 82, and avoid the accumulation of materials on the top surface of the pushing head 82 from affecting subsequent operations.

[0026] A cooling jacket 10 is sleeved on the bottom of the chute 3. The cooling jacket 10 is located outside the rotary kiln and is used to cool the connection part between the chute 3 and the rotary kiln by air cooling or water cooling.

[0027] The bottom top of the chute 3 is hinged with an end cover 11. The end cover 11 is located in the rotary kiln. The end cover 11 is used to cover the outlet of the chute 3 under its own gravity, so as to prevent the high-temperature flue gas in the rotary kiln from entering the chute 3. When the crushed material slides down automatically or is pushed down by the pusher mechanism 8, the end cover 11 will be automatically opened due to the force.

[0028] When the present utility model is in use, open the upper plug valve 4, and put appropriate materials into the blanking chute through the feed hopper 1; close the upper plug valve 4, start the crushing motor of the crushing mechanism 6, so that the crushing roller 61 crushes the materials. After the crushing is completed, open the lower plug valve 5 to make the crushed materials fall into the chute 3. At the same time, start the stirring motor 75 of the stirring mechanism 7 to make the stirring rod 72 stir the materials falling after crushing; after the materials have fallen, close the lower plug valve 5 and open the upper plug valve 4 to continue feeding, and close the upper plug valve 4 after the feeding is completed to continue crushing the materials. At the same time, drive the telescopic cylinder 81 to push out the push head 82 to push the materials falling into the chute 3 into the rotary kiln and then reset.

Claims

1. A rotary kiln feeding device, comprising a feeding hopper (1), the bottom of the feeding hopper (1) is communicated with a longitudinally arranged blanking chute (2), the bottom of the blanking chute (2) is communicated with a feeding chute (3) which is inclined and the bottom end of which is used for inserting into the rotary kiln, and is characterized in that: A top plug valve (4) is horizontally arranged on the blanking chute (2), and a bottom plug valve (5) is arranged below the top plug valve (4). A crushing mechanism (6) for crushing materials is arranged between the top plug valve (4) and the bottom plug valve (5) in the blanking chute (2); a stirring mechanism (7) is arranged below the bottom plug valve (5) at the bottom of the blanking chute (2) for stirring the crushed materials to prevent blockage; a pushing mechanism (8) is arranged in the chute (3) for pushing the crushed materials falling from the blanking chute (2) into the rotary kiln.

2. The feeding device for a rotary kiln according to claim 1, wherein: The crushing mechanism (6) includes two crushing rollers (61) arranged side by side in the horizontal direction and respectively rotatably connected to the front and rear chute plates of the blanking chute (2). The rear ends of the two crushing rollers (61) both penetrate through the rear chute plate of the blanking chute (2) and are connected through a transmission assembly. The rear end of one crushing roller (61) is connected to a crushing motor arranged on the rear chute plate of the blanking chute (2) for driving the two crushing rollers (61) to rotate synchronously through the transmission assembly; the crushing mechanism (6) further includes tooth blocks (62) arranged on the inner walls of the blanking chute (2) on the left and right sides of the two crushing rollers (61) for cooperating with the crushing rollers (61).

3. The rotary kiln feeding device according to claim 1, wherein: The stirring mechanism (7) includes a rotating shaft (71) horizontally and rotatably arranged at the bottom of the blanking chute (2), with one end penetrating through the blanking chute (2) and being sealingly assembled with the blanking chute (2). A plurality of stirring rods (72) vertically arranged upward with pointed tops are arranged at intervals along the length direction of the rotating shaft (71) on the rotating shaft (71). A driven gear (73) is arranged at the penetrating end of the rotating shaft (71); a stirring motor (75) is arranged on the outer side wall of the blanking chute (2), and a driving gear (74) meshing with the driven gear (73) is arranged on the rotating shaft of the stirring motor (75).

4. A rotary kiln feeding device according to claim 1, characterized in that: The pushing mechanism (8) includes a telescopic cylinder (81) arranged at the top of the chute (3). The telescopic rod of the telescopic cylinder (81) is arranged in the chute (3) and is connected to a push head (82) slidably arranged in the chute (3); the front end face of the push head (82) is an inclined surface with the bottom end forward and the top end backward.

5. The feeding device for a rotary kiln according to claim 4, characterized in that: A cleaning scraper (9) longitudinally arranged is penetrated through a part of the top upper chute plate of the chute (3) near the blanking chute (2), and the bottom end of the cleaning scraper (9) is used to abut against the top surface of the push head (82) to scrape off the materials on the push head (82).

6. The feeding device for a rotary kiln according to claim 1, characterized in that: A cooling jacket (10) for cooling the connection between the chute (3) and the rotary kiln is sleeved on the bottom of the chute (3) outside the rotary kiln.

7. A rotary kiln feeding device according to claim 1, characterized in that: An end cover (11) is hinged to the top of the bottom end of the chute (3) in the rotary kiln for covering the outlet of the chute (3) under its own gravity to prevent the flue gas in the rotary kiln from entering the chute (3).

8. The rotary kiln feeding device according to claim 1, characterized in that: A plurality of layers of buffer blocks (12) for slowing down the sliding speed of the materials to prevent the materials from being blocked due to excessive aggregation at the bottom in the feed hopper (1) are arranged along the circumferential direction on the inner wall of the feed hopper (1).

Images