Material feeding device of rotary kiln

Abstract

The utility model provides a rotary kiln material feeding device which comprises a main hopper, a material guiding piece and a transmission assembly, the material guiding piece is in an inclined state and is rotationally arranged in a tail kiln of a rotary kiln, the large end, facing downwards, of the material guiding piece extends into a rotary kiln barrel, and the side wall, facing upwards, of the material guiding piece is in an opening shape; the main hopper is fixedly arranged at the top of the tail kiln of the rotary kiln, and a discharging opening of the main hopper is located over the material guiding piece; the transmission assembly is in gear connection with the rotary kiln barrel and the material guiding piece. The transmission assembly is used for enabling the material guiding piece to rotate in a reciprocating mode through rotation of the rotary kiln barrel. According to the utility model, the problems that the spiral body deforms or deviates after being operated for a long time and needs to be overhauled or maintained regularly and the operation cost is increased when the spiral body is used for transferring raw materials into the rotary kiln barrel are solved, the stability is improved, and the cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of rotary kilns, in particular to a material supply device for a rotary kiln. Background Art

[0002] Rotary kilns are widely used in many industries, including building materials, metallurgy, chemicals, and environmental protection. They primarily utilize rotating drums to mechanically, physically, or chemically process solid materials. Rotary kilns typically use a chute system to feed the material, where the raw materials in the feed tube flow by gravity into the kiln's inlet. Rapidly entering the kiln can cause impact damage to the insulation bricks.

[0003] Chinese patent CN201821363082.6 discloses a rotary kiln feeding and pushing device and rotary kiln equipment, including a motor, a transmission belt, a first transmission wheel, a second transmission wheel, a spiral drum and a spiral body in cooperation with the transmission belt, wherein the first transmission wheel is connected to the motor, the spiral drum is sleeved on the outside of the spiral body, the spiral body includes a rotating shaft and spiral blades, the spiral blades are fixed to the outside of the rotating shaft, the rotating shaft is fixedly connected to the second transmission wheel, one end of the spiral drum is fixedly mounted in the side wall of the rotary kiln tail, and the other end of the spiral drum is connected to the feed pipe of the rotary kiln and is arranged opposite to the feed port of the rotary kiln body. However, when the material falls, it will impact the spiral body, and after long-term operation, the spiral body will be deformed or offset, so that the equipment needs regular inspection or maintenance, and adding a motor to drive the spiral body to rotate increases the operating cost. Utility Model Content

[0004] In response to the deficiencies in the prior art, the present invention provides a rotary kiln material feeding device, which solves the problem in the prior art that when a spiral is used to transfer raw materials to the interior of the rotary kiln cylinder, the spiral will be deformed or offset after long-term operation, requiring regular inspection or maintenance, which increases operating costs.

[0005] According to an embodiment of the present utility model, a rotary kiln material feeding device includes a main hopper, a material guide member and a transmission assembly, wherein the material guide member is an inclined cylindrical structure and is rotatably arranged in the tail kiln of the rotary kiln, the downward end of the material guide member extends into the rotary kiln cylinder, and the upward side wall of the material guide member is open; the main hopper is fixedly arranged on the top of the tail kiln of the rotary kiln, and the discharge port of the main hopper is located directly above the material guide member; the transmission assembly is respectively connected to the rotary kiln cylinder and the material guide member gear, and the transmission assembly is used to rely on the rotation of the rotary kiln cylinder to make the material guide member rotate back and forth.

[0006] The technical principle of the utility model is that when the raw materials fall into the inside of the material guide member from the main hopper, the transmission assembly is used to make the material guide member rotate back and forth through the continuously rotating rotary kiln cylinder, and the raw materials inside the material guide member with an inclined axis will move quickly toward the rotary kiln cylinder.

[0007] Preferably, the transmission assembly includes a first gear, a second gear, a third gear, an incomplete gear, a transmission shaft and a transmission frame, the first gear is sleeved on the outside of the rotary kiln cylinder, the transmission shaft is parallel to the axis of the rotary kiln cylinder and is arranged below the rotary kiln cylinder, the second gear is fixedly arranged at one end of the transmission shaft and meshes with the first gear, and the incomplete gear is fixedly arranged at the other end of the transmission shaft; the transmission frame is a vertically arranged square frame, the upper and lower sides of the transmission frame are provided with a first bar tooth, the incomplete gear is meshed with the first bar tooth inside the transmission frame, the transmission shaft and the rotary kiln tail kiln are rotatably connected, and the third gear is arranged outside the material guide member; the top surface of the transmission frame is provided with a second bar tooth, the second bar tooth is meshed with the third gear, and sliding rods are horizontally arranged on both sides of the transmission frame, and the sliding rods and the rotary kiln tail kiln are slidably connected in the horizontal direction.

[0008] Preferably, a plurality of supporting wheels symmetrical with respect to a vertical plane passing through the axis of the material guide member are provided inside the tail kiln of the rotary kiln, and the supporting wheels are in rolling contact with the bottom of the material guide member.

[0009] Preferably, the outer wall of the material guide is provided with a limiting ring, and also includes a limiting groove fixedly arranged below the material guide, the limiting groove is an arc-shaped structure and opens upward, and the limiting ring and the limiting groove are adapted to each other.

[0010] Preferably, the material guide member extends to one side of the rotary kiln cylinder and is spaced from the end of the rotary kiln cylinder, and a space is provided between the material guide member and the inner wall of the rotary kiln cylinder.

[0011] Preferably, the main hopper discharge port is located in the middle of the axial position of the material guide member.

[0012] Preferably, the sliding rod is in the shape of a square column.

[0013] Compared to existing technologies, the present invention offers the following advantages: The transmission assembly in the present invention is connected to the unidirectionally rotating rotary kiln drum, driving the reciprocating rotation of the material guide. This eliminates the need for a vibrating or pushing mechanism to prevent raw materials from adhering to the inner wall of the material guide, thereby improving the stability of raw material movement within the material guide. The present invention also provides greater stability during the movement of raw materials from below the main hopper into the rotary kiln drum, eliminating the need for a motor to power the movement of the raw materials and reducing procurement and operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0015] Figure 2 It is a schematic diagram of the transmission frame of the present utility model.

[0016] Figure 3 This is a schematic diagram of the limit ring of the present utility model.

[0017] Figure 4 This is a cross-sectional view of the limiting groove of the utility model.

[0018] In the above drawings: 1. rotary kiln cylinder; 2. rotary kiln tail kiln; 3. main hopper; 4. material guide; 5. support wheel; 6. limiting groove; 7. limiting ring; 8. first gear; 9. transmission shaft; 10. transmission frame; 11. second gear; 12. third gear; 13. sliding rod; 14. first strip tooth; 15. second strip tooth; 16. incomplete gear. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further described below with reference to the accompanying drawings and embodiments.

[0020] like Figure 1 、 3 As shown, the embodiment of the utility model proposes a rotary kiln material supply device, which includes a main hopper 3, a material guide 4 and a transmission assembly. The rotary kiln includes a rotary kiln cylinder 1 and a rotary kiln tail kiln 2. The rotary kiln tail kiln 2 is used to recover the gas inside the rotary kiln cylinder 1 to avoid direct discharge and affect the surrounding environment. When the rotary kiln is working, a motor is connected through a gear to make the rotary kiln cylinder 1 rotate continuously. The material guide 4 is an inclined cylindrical structure and is rotatably arranged in the rotary kiln tail kiln 2. The downward end of the material guide 4 extends into the rotary kiln cylinder 1. The upward side wall of the material guide 4 is open, that is, the upward part of an inclined cylinder is cut off. The main hopper 3 is fixedly arranged at the top of the rotary kiln tail kiln 2. The discharge port of the main hopper 3 is located directly above the material guide 4. The material falls downward from the discharge port of the main hopper 3 and enters the interior of the material guide 4. The transmission assembly is connected to the rotary kiln cylinder 1 and the material guide member 4 through gears. The transmission assembly is used to reciprocate the material guide member 4 in response to the rotation of the rotary kiln cylinder 1. During operation, the transmission assembly causes the material guide member 4 to reciprocate through a predetermined angle, forcing the material within the material guide member 4 to move downward along the sidewalls of the material guide member 4 and toward the rotary kiln cylinder 1. As the material guide member 4 rotates, the openings in its sidewalls prevent it from moving downward, preventing material from overflowing.

[0021] like Figure 1 、 2As shown, preferably, the transmission assembly includes a first gear 8, a second gear 11, a third gear 12, an incomplete gear 16, a transmission shaft 9 and a transmission frame 10. The first gear 8 is fixedly sleeved on the outside of the rotary kiln cylinder 1. The first gear 8 is close to the material guide 4. The transmission shaft 9 is parallel to the axis of the rotary kiln cylinder 1 and is arranged below the rotary kiln cylinder 1. The second gear 11 is fixedly arranged at one end of the transmission shaft 9 and meshes with the first gear 8. The incomplete gear 16 is fixedly arranged at the other end of the transmission shaft 9. The transmission frame 10 is a vertically arranged square frame. The upper and lower sides of the transmission frame 10 are both provided with first strip teeth 14. The incomplete gear 16 and the first strip teeth 14 inside the transmission frame 10 are meshed in sequence. The transmission shaft 9 is rotatably connected to the rotary kiln tail kiln 2. The third gear 12 is arranged outside the material guide 4. The third gear 12 is a bevel gear. The top surface of the transmission frame 10 is provided with a second strip-shaped tooth 15, which meshes with the third gear 12. Sliding rods 13 are horizontally provided on both sides of the transmission frame 10, and the sliding rods 13 are horizontally slidably connected to the rotary kiln tail kiln 2. When the rotary kiln cylinder 1 rotates, the first gear 8 drives the second gear 11 and the incomplete gear 16 to rotate. The incomplete gear 16 sequentially meshes with the first strip-shaped tooth 14 on the upper and lower sides, causing the transmission frame 10 to reciprocate in the horizontal direction. The second strip-shaped tooth 15 on the top surface of the transmission frame 10 drives the third gear 12 to rotate reciprocatingly, thereby causing the material guide 4 to reciprocate at a certain angle inside the rotary kiln cylinder 1.

[0022] like Figure 1 As shown, the rotary kiln tail chamber 2 is preferably equipped with a plurality of support wheels 5 symmetrically arranged relative to a vertical plane passing through the axis of the material guide member 4. The support wheels 5 are in rolling contact with the bottom of the material guide member 4. A support frame is provided within the rotary kiln tail chamber 2, and the support frame is rotatably connected to the support wheels 5. As the rotary kiln shell 1 rotates, the support wheels 5 support the bottom of the rotary kiln shell 1, preventing the rotary kiln shell 1 from moving left or right. The support wheels 5 are arranged along the axis of the material guide member 4.

[0023] like Figure 1 、 4 As shown, as a preferred embodiment, a retaining ring 7 is fixedly mounted on the outer wall of the material guide 4. This retaining ring 7 is an arcuate structure, with a portion removed at the opening of the material guide 4. Furthermore, a retaining groove 6 is fixedly disposed below the material guide 4. This retaining groove 6 is an upwardly facing arcuate structure, and the retaining ring 7 fits snugly within the retaining groove 6. When the material guide 4 is driven back and forth by the transmission assembly, the retaining ring 7 also reciprocates within the retaining groove 6, which prevents the material guide 4 from axial movement.

[0024] Preferably, the material guide 4 extends to one side of the rotary kiln cylinder 1 and is spaced apart at the end of the rotary kiln cylinder 1 to prevent material from overflowing from the end of the rotary kiln cylinder 1. A space is provided between the material guide 4 and the inner wall of the rotary kiln cylinder 1 to reduce noise generated by friction.

[0025] Preferably, the discharge port of the main hopper 3 is located in the middle of the axial position of the material guide member 4 to prevent material from overflowing.

[0026] Preferably, the sliding rod 13 is in the shape of a square column, and a matching square hole is provided on the rotary kiln tail kiln 2 to prevent the sliding rod 13 from rotating radially and affecting the meshing of the transmission frame 10 and the third gear 12 and the incomplete gear 16.

[0027] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model and are not limiting. Although the utility model is described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A rotary kiln material feeding device, characterized in that: The invention comprises a main hopper (3), a material guide (4) and a transmission assembly, wherein the material guide (4) is an inclined cylindrical structure and is rotatably arranged in the rotary kiln tail kiln (2), the downward end of the material guide (4) extends into the rotary kiln cylinder (1), and the upward side wall of the material guide (4) is open; the main hopper (3) is fixedly arranged on the top of the rotary kiln tail kiln (2), and the discharge port of the main hopper (3) is located directly above the material guide (4); the transmission assembly is respectively connected with the rotary kiln cylinder (1) and the material guide (4) by gears, and the transmission assembly is used to make the material guide (4) rotate back and forth by relying on the rotation of the rotary kiln cylinder (1).

2. A rotary kiln material feeding device according to claim 1, characterized in that: The transmission assembly comprises a first gear (8), a second gear (11), a third gear (12), an incomplete gear (16), a transmission shaft (9) and a transmission frame (10), wherein the first gear (8) is sleeved on the outside of the rotary kiln cylinder (1), the transmission shaft (9) is parallel to the axis of the rotary kiln cylinder (1) and is arranged below the rotary kiln cylinder (1), the second gear (11) is fixedly arranged at one end of the transmission shaft (9) and meshes with the first gear (8), and the incomplete gear (16) is fixedly arranged at the other end of the transmission shaft (9); the transmission frame (10) is a vertically arranged square frame, and the transmission The movable frame (10) is provided with a first strip-shaped tooth (14) on both the upper and lower sides thereof, the incomplete gear (16) is engaged with the first strip-shaped tooth (14) inside the transmission frame (10), the transmission shaft (9) is rotationally connected to the rotary kiln tail kiln (2), and the third gear (12) is provided outside the material guide member (4); the top surface of the transmission frame (10) is provided with a second strip-shaped tooth (15), the second strip-shaped tooth (15) is engaged with the third gear (12), and sliding rods (13) are horizontally provided on both sides of the transmission frame (10), and the sliding rods (13) are horizontally connected to the rotary kiln tail kiln (2).

3. A rotary kiln material feeding device according to claim 1, characterized in that: A plurality of supporting wheels (5) are provided inside the rotary kiln tail kiln (2) and are symmetrical relative to a vertical plane passing through the axis of the material guide member (4). The supporting wheels (5) are in rolling contact with the bottom of the material guide member (4).

4. A rotary kiln material feeding device according to claim 1, characterized in that: The outer wall of the material guide member (4) is provided with a limiting ring (7), and further comprises a limiting groove (6) fixedly arranged below the material guide member (4); the limiting groove (6) is an arc-shaped structure and opens upward; the limiting ring (7) and the limiting groove (6) are adapted.

5. A rotary kiln material feeding device according to claim 1, characterized in that: The material guide member (4) extends to one side of the rotary kiln cylinder (1) and is provided with a gap at the end of the rotary kiln cylinder (1); and a gap is provided between the material guide member (4) and the inner wall of the rotary kiln cylinder (1).

6. A rotary kiln material feeding device according to claim 1, characterized in that: The discharge port of the main hopper (3) is located in the middle of the axial position of the material guide member (4).

7. A rotary kiln material feeding device according to claim 2, characterized in that: The sliding rod (13) is in the shape of a square column.

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