CN214620592U - Sealing device for preventing cold air from entering preheater at kiln tail of rotary kiln - Google Patents

Abstract

The utility model discloses a sealing device for preventing cold air from entering a preheater at the kiln tail of a rotary kiln, which comprises a rotary kiln barrel, a kiln tail smoke chamber and a kiln tail smoke chamber fixing sleeve fixed on the kiln tail smoke chamber, wherein a fixed friction ring is sleeved on the smoke chamber fixing sleeve, and a gap between the sealed fixed friction ring and the kiln tail smoke chamber fixing sleeve is sealed by annular sealing; the movable friction ring is fixed on the rotary kiln barrel, a horizontal rail is arranged on a kiln tail smoke chamber of the rotary kiln, rolling wheels are arranged on the horizontal rail, and the rolling wheels are arranged on rolling wheel shafts; the center of the fixed friction ring is superposed with the center of the kiln tail smoke chamber fixed sleeve and is also superposed with the center line of the rotary kiln barrel; under the action of the gravity of the counterweight hammer, the steel wire rope pulls the fixed friction ring to be always in close contact with the end face of the movable friction ring through the fixed pulley. The utility model discloses the sealed problem of leaking out of solution kiln tail that can be fine to the coal consumption of reducible rotary kiln, energy saving, simple structure.

Description

Sealing device for preventing cold air from entering preheater at kiln tail of rotary kiln

Technical Field

The utility model relates to a rotary kiln calcines technical field, specifically is a rotary kiln tail anti-cold wind gets into preheater sealing device.

Background

In the cement industry, kiln tail sealing of a rotary kiln is mostly sealed by adopting an end face gravity friction ring, the structure is that a fixed friction ring which horizontally moves along the central line of the kiln is fixed by utilizing a hinged seat and an adjusting screw buckle, so that the weight of the fixed friction ring which horizontally moves is dropped on the hinged seat and is not dropped on a kiln tail smoke chamber fixed sleeve, suspenders at two sides of the fixed friction ring adopt a separated structure, an adjusting screw rod is added in the middle of the suspenders at two sides of the fixed friction ring, the coaxiality of the fixed seal ring and a cylinder can be well corrected, and thus, the generation of large friction force caused by the weight of the friction ring dropping on the kiln tail smoke chamber fixed sleeve is reduced, and the horizontal movement resistance of the friction ring is reduced; the fixed friction ring is tightly attached to the movable friction ring under the action of the gravity hammer, the contact area of the two rings is large, and meanwhile, the self-adaption and compensation capabilities for radial runout and end runout of a kiln tail cylinder are strong, so that the axial sealing is tight, and air leakage is reduced. In practical application, the rotary kiln rotates under the action of self gravity and is pushed by the hydraulic catch wheel, the kiln moves up and down along the central line of the kiln, and the moving distance is about 50mm generally. The fixed friction ring is fixed on a kiln tail smoke chamber by a hinged seat with a joint bearing, the fixed friction ring is always close to a kiln barrel under the action of a gravity hammer, when the fixed friction ring moves, the center of the fixed friction ring can not coincide with the center of a smoke chamber fixed sleeve, sealing materials in a radial sealing device in the fixed friction ring are extruded and deformed, the friction force is increased, and therefore the effect of the gravity hammer is overcome, the movable friction ring is not attached, and air leakage of a kiln tail sealing system is caused. When the kiln normally calcines, entire system is in little negative pressure state, and kiln tail sealing system leaks out and causes cold wind to get into the pre-heater, can influence the heat exchange in the pre-heater, reduces the temperature in the pre-heater, for guaranteeing to calcine the effect, only increases heat energy and drops into to influence the energy consumption.

SUMMERY OF THE UTILITY MODEL

Therefore, the utility model aims at providing a sealed cold air admission preheater device of preventing of rotary kiln tail, it can solve the sealed not tight problem of leading to sealing because of the center height produces the resistance change along with the swing range change completely of swing.

In order to realize the purpose, the utility model discloses a technical scheme: a sealing device for preventing cold air from entering a preheater at the kiln tail of a rotary kiln comprises a rotary kiln barrel, a kiln tail smoke chamber and a kiln tail smoke chamber fixing sleeve fixed on the kiln tail smoke chamber, wherein a fixed friction ring is sleeved on the smoke chamber fixing sleeve, and a gap between the sealed fixed friction ring and the kiln tail smoke chamber fixing sleeve is sealed in an annular manner; the movable friction ring is fixed on the rotary kiln barrel, a horizontal rail is arranged on a kiln tail smoke chamber of the rotary kiln, rolling wheels are arranged on the horizontal rail, and the rolling wheels are arranged on rolling wheel shafts; the roller shaft is rigidly connected with the turnbuckle connecting rod and then rigidly connected with the fixed friction ring, so that the center of the fixed friction ring is superposed with the center of the fixed sleeve of the kiln tail smoke chamber and is superposed with the center line of the rotary kiln barrel; a counterweight hammer is arranged on the fixed friction ring extension plate, and a fixed pulley is arranged on the periphery of the smoke chamber fixed sleeve; one end of the steel wire rope is connected with a counterweight hammer, and the fixed friction ring is drawn by the fixed pulley to be always in close contact with the end face of the movable friction ring under the action of the gravity of the counterweight hammer.

Preferably, the roller has an end cap fixed to an end of the roller by a fastening bolt.

Preferably, the roller shaft is rigidly connected with the turnbuckle connecting rod through a flat key.

Preferably, a rolling bearing is arranged in the roller, and the rolling bearing is arranged on the roller shaft.

Has the advantages that: because the center of the fixed friction ring coincides with the center of the kiln tail smoke chamber fixed sleeve, when the fixed friction ring moves towards the kiln barrel under the action of the gravity hammer, the roller also rolls along with the fixed friction ring, because the height of the center of the roller shaft does not change on a horizontal track, and the roller shaft is rigidly connected with the fixed friction ring, the center of the fixed friction ring does not change, the center of the fixed friction ring coincides with the center of the kiln tail smoke chamber fixed sleeve all the time, the system resistance is reduced to the maximum extent, the flexibility of the system is improved, the fixed friction ring is enabled to be attached to the movable friction ring all the time under the action of the gravity hammer, and the problem of kiln tail sealing and air leakage is well solved. And the problem of cold air prevention of the kiln tail of the rotary kiln is solved, the coal consumption of the rotary kiln can be reduced, the energy is saved, and the structure is simple.

Drawings

Fig. 1 is a schematic view of an overall structure of a sealing device for preventing cold air from entering a preheater at a kiln tail of a rotary kiln provided by embodiment 1 of the present invention;

fig. 2 is a schematic view of a horizontal rail roller of a sealing device for preventing cold air from entering a preheater at the kiln tail of a rotary kiln provided by the embodiment 1 of the present invention;

fig. 3 is a right side view of the horizontal rail roller of the sealing device for preventing cold air from entering the preheater at the kiln tail of the rotary kiln, which is provided by the embodiment 2 of the utility model.

In the figure: 2. adjusting the screw buckle; 3. a kiln tail smoke chamber; 4. a kiln tail smoke chamber fixing sleeve; 5. Fixing a friction ring; 6. a movable friction ring; 7. a fixed pulley; 8. a counterweight hammer; 9. annular seal, 10, rotary kiln cylinder; 11. a roller; 12. a horizontal rail 13, a rail base 14, a flat key 15 and a turnbuckle connecting rod; 16. a roller shaft; 17. a rolling bearing; 18. fastening a bolt; 19. And (4) end covers.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be described in detail with reference to the accompanying drawings and examples.

A sealing device for preventing cold air from entering a preheater at the kiln tail of a rotary kiln is characterized in that a horizontal rail 12 and a rail base 13 are horizontally and fixedly installed on a kiln tail smoke chamber 3 of the rotary kiln, a roller 11 is a cylinder, and when the roller 11 rolls back and forth on the horizontal rail 12, the height of the center of the roller 11 can be kept unchanged. The kiln tail smoke chamber fixing sleeve 4 is fixed on the kiln tail smoke chamber 3, the central line of the kiln tail smoke chamber fixing sleeve 4 is superposed with the central line of the rotary kiln barrel 10, and the annular seal 9 seals the gap between the fixed friction ring 5 and the kiln tail smoke chamber fixing sleeve 4 to prevent air leakage from the gap. The roller shaft 16 is rigidly connected with a turnbuckle connecting rod 15 through a flat key 14 and then rigidly connected with a fixed friction ring 5, the fixed friction ring 5 is sleeved on the smoke chamber fixing sleeve 4, the turnbuckle 2 is operated and adjusted to enable the center of the fixed friction ring 5 to coincide with the center of the kiln tail smoke chamber fixing sleeve 4 and coincide with the center line of the rotary kiln barrel 10, the weight of the fixed friction ring 5 cannot fall on the kiln tail smoke chamber fixing sleeve 4, and therefore the friction force between the kiln tail smoke chamber fixing sleeve 4 and the fixed friction ring 5 is reduced. When the roller 11 rolls back and forth on the horizontal track 12, the axial lead of the roller shaft 16 is overlapped with the central lead of the roller 11, so that the axial lead of the roller shaft 16 can be kept unchanged, the center of the fixed friction ring 5 can be ensured to be unchanged, and the center of the fixed friction ring is always overlapped with the center of the kiln tail smoke chamber fixed sleeve 4. The roller 11 is internally provided with a rolling bearing 17, the rolling bearing 17 is arranged on a roller shaft 16, the roller 11 is provided with an end cover 19, and the end cover 19 is fixed at the end part of the roller 11 through a fastening bolt 18. The movable friction ring 6 is fixed on the rotary kiln cylinder body 10, the centers of the movable friction ring and the rotary kiln cylinder body 10 are overlapped, so that the centers of the smoke chamber fixed sleeve 4, the fixed friction ring 5, the movable friction ring 6 and the rotary kiln cylinder body 10 are all overlapped, the fixed friction ring 5 is always in end face contact with the movable friction ring 6, and the centers of the two are overlapped to ensure the contact area of the two to the maximum extent. Six counter weights 8 are uniformly distributed on the extension plate of the fixed friction ring 5, and six fixed pulleys 7 are uniformly distributed on the periphery of the smoke chamber fixed sleeve. The counterweight hammer 8 pulls the fixed friction ring 5 to be always tightly attached to the end face of the movable friction ring 6 through the steel wire rope and the fixed pulley 7 under the action of self gravity, the closer the counterweight hammer and the movable friction ring are attached to each other, the smaller the air leakage is until the air leakage is avoided, the heat energy loss is reduced, the coal consumption is reduced, and the energy-saving effect is achieved.

The above-described embodiments are only intended to be combined with the disclosure of the specification, so that those skilled in the art can understand and read the present invention, and the present invention is not intended to be limited by the limitations of the present invention, and therefore does not have any technical essential meaning, and any modification of the structure, change of the ratio relationship, or adjustment of the size should still fall within the scope of the present invention without affecting the function and the achievable purpose of the present invention.

Claims (4)

1. A sealing device for preventing cold air from entering a preheater at the kiln tail of a rotary kiln comprises a rotary kiln barrel (10), a kiln tail smoke chamber (3) and a kiln tail smoke chamber fixing sleeve (4) fixed on the kiln tail smoke chamber (3), wherein a fixing friction ring (5) is sleeved on the smoke chamber fixing sleeve (4), and a gap between the sealing fixing friction ring (5) and the kiln tail smoke chamber fixing sleeve (4) is sealed by an annular seal (9); the movable friction ring (6) is fixed on a rotary kiln cylinder (10), and is characterized in that a horizontal rail (12) is arranged on a kiln tail smoke chamber (3) of the rotary kiln, rollers (11) are arranged on the horizontal rail (12), and the rollers (11) are arranged on roller shafts (16); the roller shaft (16) is rigidly connected with the turnbuckle connecting rod (15) and then rigidly connected with the fixed friction ring (5), so that the center of the fixed friction ring (5) is superposed with the center of the kiln tail smoke chamber fixed sleeve (4) and is superposed with the center line of the rotary kiln cylinder (10); a counterweight hammer (8) is arranged on the extension plate of the fixed friction ring (5), and a fixed pulley (7) is arranged on the periphery of the smoke chamber fixed sleeve (4); one end of the steel wire rope is connected with a counterweight hammer (8), and under the action of the gravity of the counterweight hammer (8), the steel wire rope pulls the fixed friction ring (5) to be always in close contact with the end face of the movable friction ring (6) through the fixed pulley (7).

2. The sealing device for preventing cold air from entering the preheater of the rotary kiln tail of claim 1, wherein the roller (11) is provided with an end cover (19), and the end cover (19) is fixed at the end part of the roller (11) through a fastening bolt (18).

3. The rotary kiln tail cold air entering prevention preheater sealing device as claimed in claim 1, wherein the roller shaft (16) is rigidly connected with a turnbuckle connecting rod (15) through a flat key (14).

4. The sealing device for preventing cold air from entering the preheater at the tail of the rotary kiln as claimed in claim 1, wherein a rolling bearing (17) is arranged in the roller (11), and the rolling bearing (17) is arranged on a roller shaft (16).

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