Rotary kiln wheel belt gap adjusting structure

Abstract

The utility model discloses a rotary kiln wheel belt gap adjusting structure which comprises a wheel belt barrel body and base plates, a plurality of base plates are evenly distributed between a wheel belt and the wheel belt barrel body at equal intervals, the base plates are distributed in an annular array mode in the circumferential direction of the middle of the wheel belt barrel body, and the periphery of each base plate is limited by side edge check blocks on the two sides, tail end check blocks at the two ends and gasket fixing blocks. The base plate is arranged between the wheel belt and the wheel belt cylinder in a floating manner; the adjusting gasket can be plugged below the base plate to adjust a gap between the wheel belt and the base plate; the structure is compact in design, a combined structure of the floating base plate and the adjusting gaskets is adopted to adjust the gap of the wheel belt, the adjusting gaskets of different specifications are padded between the base plate and the outer wall of the wheel belt cylinder body according to actual requirements, the normal gap between the wheel belt and the supporting base plate is maintained, abnormal noise and abnormal abrasion are avoided, rotation clamping is prevented, and the service life of the wheel belt is prolonged. Normal and safe operation of the rotary kiln is guaranteed, rapid installation and maintenance are achieved, maintenance time and cost are saved, and the maintenance period of the rotary kiln is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of rotary kilns, and in particular relates to a rotary kiln wheel belt gap adjustment structure. Background Art

[0002] The rotary kiln is a low-speed, heavy-loaded rotary thermal equipment. The movement and stress of the rotary kiln during operation are very complex, and the stress conditions under cold and hot motions also vary greatly. According to the change of the aspect ratio of the rotary kiln, it is supported by two or more tugs and belts. The load of the rotary kiln is transmitted to the belt through the cylinder pad, and then transmitted to the supporting device by the belt; the rotary kiln has a certain inclination, and the rotating cylinder is driven by the transmission equipment to realize the movement of materials from the kiln tail to the kiln head.

[0003] There is a certain gap designed between the kiln body and the wheel band. When the kiln body rotates, the rotation of the wheel band and the kiln body is not synchronized. If the gap is too large, the asynchrony of the rotation will become larger, and the contact area between the kiln body and the wheel band will be reduced, that is, the surface contact of the arc segment will be changed to point contact, which will cause the contact surface between the kiln body and the wheel band to wear too quickly, seriously affecting the service life; if the gap is too small, it is not enough to meet the thermal expansion of the kiln body during operation, which will cause the kiln body to have a neck, resulting in slight deformation of the kiln body, and even the kiln body will be stuck due to the wheel band, seriously affecting the normal operation and service life of the rotary kiln.

[0004] The circumferential position of the drum section of the rotary kiln cylinder is fixed on the drum body of the wheel belt by a plurality of supporting pads uniformly distributed in an annular manner. Since the supporting pads are welded and fixed on the drum body of the rotary kiln, it is difficult to adjust the gap between the supporting pads and the wheel belt with the existing wheel belt supporting structure. The rotary kiln is constantly affected by bending stress, thermal deformation, friction, deadweight, etc. during operation, which have a great impact on the stress conditions of the wheel belt, drum body and pads. The clearance between the supporting pads and the wheel belt of the rotary kiln cylinder is difficult to adjust and control. When the wheel belt pad is seriously worn, the gap at the bottom of the wheel belt is too large and the shaking amount is large, causing abnormal noise, it is necessary to replace the wheel belt pad and reasonably control the hot clearance value between the wheel belt pad and the inner side of the wheel belt, otherwise it will cause the problem of the rotary structure being stuck, and then cause serious equipment safety accidents such as wheel belt breakage or kiln drum necking. The shutdown adjustment and maintenance time is long, affecting the safe operation of the rotary kiln. Summary of the invention

[0005] In order to solve the above technical problems, the utility model provides a rotary kiln wheel band gap adjustment structure, which adopts a combined structure of a floating pad and an adjusting pad to adjust the gap between the wheel band and the supporting pad to maintain a normal wheel band gap. The gap adjustment not only prevents equipment friction, but also meets the thermal expansion amount during the operation of the rotary kiln, effectively solves the problem of difficulty in adjusting the gap between the supporting pad and the wheel band of the rotary kiln, solves abnormal noise and abnormal wear, prevents rotation from getting stuck, and ensures the normal and safe operation of the rotary kiln.

[0006] The technical scheme adopted by the utility model is: a rotary kiln wheel band gap adjustment structure, comprising a wheel band cylinder and a pad, the wheel band cylinder is a cylinder section of the rotary kiln cylinder, the rotary kiln cylinder is rotatably installed in the wheel band, the wheel band is annularly arranged on the outer periphery of the wheel band cylinder, a plurality of pads are evenly and equidistantly arranged between the wheel band and the wheel band cylinder, the pads are distributed in an annular array along the circumference of the middle part of the wheel band cylinder, the pads are respectively limited by side blocks on both sides and end blocks at both ends and pad fixing blocks, the pads are floatingly arranged between the wheel band and the wheel band cylinder, and an adjusting pad can be inserted under the pads to adjust the gap between the wheel band and the pads; retaining rings are respectively fixedly arranged on the upper surfaces of the pads on both sides of the wheel band, and retaining blocks are fixedly arranged at intervals close to the outer sides of the retaining rings, and the retaining blocks are fixedly arranged on the pads.

[0007] The retaining rings on both sides of the wheel band are both in the shape of circular rings. The retaining ring on each side is made by splicing four sections, and an anti-rotation block is welded at the joint between every two sections of the retaining rings.

[0008] The pad is a long strip-shaped plate, and the length direction of the pad is in the same direction as the axial direction of the rotary kiln cylinder.

[0009] Side blocks are fitted on both sides of the pad in the length direction, and each pad has four side blocks, which are fixedly arranged on the outer wall of the wheel tyre cylinder.

[0010] The end stopper is a rectangular block, the gasket fixing block is an isosceles triangle block, the top angle of the gasket fixing block is arc-shaped, one side of the gasket fixing block is close to the end side of the gasket plate, and the top angle end of the gasket fixing block is facing the outside of the gasket plate;

[0011] The two ends of the pad are respectively fitted with end blocks and gasket fixing blocks, which are staggered and arranged at intervals at the two ends of the pad, and are fixed on the outer wall of the wheel belt cylinder.

[0012] The length of the pad is greater than the width of the wheel band, so that an adjustment pad can be inserted between the pad and the wheel band cylinder without affecting the installation structure of the wheel band.

[0013] The four sides of the pad are respectively limited by the side blocks on both sides, the end blocks at both ends and the gasket fixing blocks. The pad is floatingly arranged between the wheel band and the wheel band cylinder, and an adjusting gasket can be inserted under the pad to adjust the gap between the wheel band and the pad. The purpose of such arrangement is that the side blocks on both sides of the pad play a circumferential positioning role, the end block at one end of the pad plays an axial positioning role to prevent the pad from axial misalignment, and the gasket fixing block at the other end of the pad is fixed after the gap is adjusted, so as to limit the adjusting gasket and prevent displacement. It is convenient to insert the adjusting gasket from either end of the pad to adjust the wheel band gap according to actual needs. When adjusting the gap between the wheel band and the floating pad, it is only necessary to replace the adjusting gaskets of different thicknesses. The wheel band gap is convenient to adjust, the gap adjustment maintenance efficiency is high, the adjustment of the floating pad and the wheel band are easy to cooperate, and the maintenance cycle of the rotary kiln can be extended.

[0014] The two ends of the pad are respectively fitted with end blocks and gasket fixing blocks, which are staggered at intervals at the two ends of the pad, and fixed on the outer wall of the wheel tyre cylinder. The purpose of this arrangement is that the end blocks and gasket fixing blocks are staggered at intervals, which makes it convenient to adjust the wheel tyre gap from both sides of the wheel tyre, and the gap adjustment is more balanced, accurate and easy to control.

[0015] A number of pads are evenly distributed between the wheel band and the wheel band cylinder, and the pads are distributed in a circular array along the circumference of the middle part of the wheel band cylinder. The purpose of this arrangement is: the width of the pads arranged on the outer periphery of the wheel band cylinder is narrow and the number is large, and the number of baffles is increased, so that the gap between the wheel band and the pads can be adjusted more accurately; the whole circle of baffles increases the support area to ensure the stability of the wheel band.

[0016] The beneficial effects of the utility model are as follows: the structure is compactly designed, and a combined structure of a floating pad and an adjusting pad is adopted to adjust the wheel band gap. According to actual needs, adjusting pads of different specifications are inserted between the pad and the outer wall of the wheel band cylinder to maintain a normal gap between the wheel band and the supporting pad. The gap adjustment not only prevents equipment friction, but also meets the thermal expansion amount during the operation of the rotary kiln, effectively solves the problem of difficulty in adjusting the gap between the supporting pad and the wheel band of the rotary kiln, solves abnormal noise and abnormal wear, prevents rotation from getting stuck, ensures the normal and safe operation of the rotary kiln, and makes the gap adjustment more convenient and accurate, realizes quick installation and maintenance, saves maintenance time and cost, and extends the maintenance and maintenance cycle of the rotary kiln. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of the rotary kiln belt barrel section of the utility model;

[0018] Figure 2 It is a schematic diagram of the partial cross-sectional structure of the tire gap adjustment structure A of the utility model;

[0019] Figure 3 It is a schematic diagram of the partial expansion structure of the wheel band gap adjustment structure B of the utility model.

[0020] Markings in the figure: 1. rotary kiln cylinder; 2. wheel cylinder; 3. wheel; 4. retaining ring; 5. pad; 6. block; 7. end block; 8. side block; 9. gasket fixing block; 10. anti-rotation block; 11. adjustment gasket. DETAILED DESCRIPTION

[0021] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings.

[0022] like Figure 1-3 As shown, a rotary kiln wheel band gap adjustment structure comprises a wheel band cylinder 2 and a pad 5. The wheel band cylinder 2 is a section of a rotary kiln cylinder 1. The rotary kiln cylinder 1 is rotatably mounted in the wheel band 3. The wheel band 3 is annularly arranged on the outer periphery of the wheel band cylinder 2. A plurality of pads 5 are evenly and equidistantly arranged between the wheel band 3 and the wheel band cylinder 2. The pads 5 are distributed in an annular array along the circumference of the middle part of the wheel band cylinder 2. The pads 5 are long strips of plate members. The length direction of the pads 5 is in the same direction as the axial direction of the rotary kiln cylinder 1. The pads 5 are limited by side blocks 8 on both sides and end blocks 7 at both ends and gasket fixing blocks 9. The floating plate 5 is arranged between the wheel belt 3 and the wheel belt cylinder 2. An adjusting shim 11 can be inserted under the pad 5 to adjust the gap between the wheel belt 3 and the pad 5. According to actual needs, the adjusting shim 11 can be inserted from either end of the pad 5 to adjust the gap of the wheel belt 3. When adjusting the gap between the wheel belt 3 and the floating pad 5, it is only necessary to replace the adjusting shims 11 of different thicknesses. The gap of the wheel belt 3 is easy to adjust, and the gap adjustment and maintenance efficiency is high. It is easy to adjust the coordination between the floating pad 5 and the wheel belt 3, and the gap adjustment is more convenient and accurate, which realizes rapid installation and maintenance, saves maintenance time and cost, and can extend the maintenance cycle of the rotary kiln.

[0023] The upper surfaces of the pads 5 on both sides of the wheel band 3 are respectively fixed with retaining rings 4, and retaining blocks 6 are fixedly arranged at intervals close to the outer sides of the retaining rings 4. The retaining blocks 6 are fixedly arranged on the pads 5. The retaining rings 4 on both sides of the wheel band 3 are both annular, and the retaining rings 4 on each side are made of four sections spliced ​​together, and an anti-rotation block 10 is welded at the joint between every two sections of the retaining rings 4.

[0024] Side blocks 8 are fitted on both sides of the backing plate 5 in the length direction. Each backing plate 5 has four side blocks 8 , which are fixedly arranged on the outer wall of the wheel tyre cylinder 2 .

[0025] The end stopper 7 is a rectangular block, the gasket fixing block 9 is an isosceles triangle block, the top corner of the gasket fixing block 9 is arc-shaped, one side of the gasket fixing block 9 is close to the end side of the pad 5, and the top corner of the gasket fixing block 9 is facing the outside of the pad 5;

[0026] The two ends of the pad 5 are respectively fitted with end stops 7 and gasket fixing blocks 9, which are staggered and arranged at intervals at the two ends of the pad 5, and are fixed on the outer wall of the wheel tyre cylinder 2.

[0027] The length of the backing plate 5 is greater than the width of the wheel belt 3 .

[0028] When the rotary kiln wheel band gap adjustment structure is installed and used, after the rotary kiln cylinder 1 is installed in place, the side block 8 and the end block 7 are welded and fixed to the outer wall of the wheel band cylinder 2 according to the interval positioning position of the backing plate 5 on the middle circumferential outer wall of the wheel band cylinder 2. After welding in place, the wheel band 3 is installed on the outer periphery of the wheel band cylinder 2, and the backing plate 5 is fitted and clamped between the side block 8 and the end block 7 set at the corresponding interval. The backing plate 5 is floatingly set between the wheel band 3 and the wheel band cylinder 2. According to the clearance value of the tyre 3 required by the kiln design, different specifications of adjusting gaskets 11 are inserted between the pad 5 and the outer wall of the tyre cylinder 2, and the clearance value of each circumferential pad 5 is adjusted in turn. Then the gasket fixing block 9 is welded to the tyre cylinder 2 close to the end of the pad 5 to prevent the adjustment gasket 11 from shifting. Repeat in the circumferential direction until a full circle is completed. The clearance adjustment of the rotary kiln tyre 3 is completed, and the normal clearance between the tyre 3 and the pad 5 is maintained to ensure that the thermal stress generated in the hot state is sufficiently released.

[0029] The side block 8, the end block 7, the gasket fixing block 9, the block 6 and the anti-rotation block 10 are all welded by fillet welds. After welding, all welds are required to be polished and subjected to magnetic particle inspection to ensure the quality of the welds and the strength of the welds. The parts not described in detail in the present invention are prior art.

[0030] In addition to the above-mentioned embodiments, the present invention may also have other implementation modes. Any technical solutions formed by equivalent replacement or equivalent transformation shall fall within the protection scope required by the present invention.

Claims

1. A rotary kiln belt gap adjustment structure, characterized in that: It includes a wheel belt cylinder and a pad. The wheel belt cylinder is a cylinder section of a rotary kiln cylinder. The rotary kiln cylinder is rotatably installed in the wheel belt. The wheel belt is annularly arranged on the outer periphery of the wheel belt cylinder. A number of pads are evenly and equidistantly arranged between the wheel belt and the wheel belt cylinder. The pads are distributed in a circular array along the circumference of the middle part of the wheel belt cylinder. The pads are respectively limited by side blocks on both sides and end blocks at both ends and gasket fixing blocks. The pads are floatingly arranged between the wheel belt and the wheel belt cylinder. Adjustment pads can be inserted under the pads to adjust the gap between the wheel belt and the pads. Stop rings are fixedly arranged on the upper surfaces of the pads on both sides of the wheel belt, and stop blocks are fixedly arranged at intervals close to the outer sides of the stop rings. The stop blocks are fixedly arranged on the pads.

2. The rotary kiln belt gap adjustment structure according to claim 1, characterized in that: The retaining rings on both sides of the wheel tyre are both circular ring-shaped. The retaining ring on each side is made by splicing four sections together, and an anti-rotation block is welded at the joint between every two sections of the retaining ring.

3. The rotary kiln belt gap adjustment structure according to claim 1, characterized in that: The backing plate is a long strip plate, and the length direction of the backing plate is in the same direction as the axial direction of the rotary kiln shell.

4. The rotary kiln belt gap adjustment structure according to claim 1, characterized in that: Side blocks are fitted on both sides of the pad in the length direction. Each pad has four side blocks, which are fixedly arranged on the outer wall of the wheel tyre cylinder.

5. The rotary kiln belt gap adjustment structure according to claim 1, characterized in that: The end stopper is a rectangular block, the gasket fixing block is an isosceles triangle block, the top angle of the gasket fixing block is arc-shaped, one side of the gasket fixing block is close to the end side of the pad, and the top angle end of the gasket fixing block rushes to the outside of the pad.

6. The rotary kiln belt gap adjustment structure according to claim 1, characterized in that: The two ends of the pad are respectively fitted with end blocks and gasket fixing blocks, which are staggered and arranged at intervals at the two ends of the pad, and are fixed on the outer wall of the wheel belt cylinder.

7. The rotary kiln belt gap adjustment structure according to claim 1, characterized in that: The length of the pad is greater than the width of the tyre.

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