CN114923330A - Cooling kiln section of roller kiln - Google Patents

Abstract

The invention discloses a cooling kiln section of a roller kiln, belonging to the technical field of roller kilns and comprising a quenching section kiln body, wherein a cold air spray head is arranged in the quenching section kiln body and connected with an external quenching fan, the cold air spray head comprises a spray head main body and an air supply core pipe, the air supply core pipe is connected with the external quenching fan, an air outlet pan head is arranged at the end part of the spray head main body, a plurality of groups of annular air outlets are arranged on the air outlet pan head, a core pipe guide hole extending to the air outlet pan head and communicated with the annular air outlets is axially arranged in the cold air spray head, the air supply core pipe is arranged in the core pipe guide hole in a sliding manner under the driving of an external driving mechanism, different annular air outlets are communicated one by one during the sliding of the air supply core pipe along the core pipe guide hole, the air outlet quantity and the air outlet range of the cold air spray head are adjusted by matching with the air outlet pan head through the air supply core pipe, and further the possibility of improving the control accuracy of cooling temperature is provided, after the real-time temperature measurement of the inner cavity of the kiln body is matched, the control accuracy of the cooling temperature can be further improved.

Description

Cooling kiln section of roller kiln

Technical Field

The invention relates to the technical field of roller kilns, in particular to a cooling kiln section of a roller kiln.

Background

The roller kilns are continuous industrial kilns which can be divided into open flame roller kilns, muffle roller kilns and electric heating roller kilns according to the fuel and heating modes, and can be divided into single-layer roller kilns, double-layer roller kilns and three-layer roller kilns according to the number of working channels.

Specifically, the roller kiln can be divided into a preheating zone, a burning zone and a cooling zone by performing three processes of preheating, burning and cooling on the product in the kiln. In the cooling zone, the product is cooled by means of natural cooling or mechanical cooling, and the product has crystal growth and transformation processes in the cooling zone, so the precision of cooling temperature control in the cooling zone has great influence on the product forming.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides a cooling kiln section of a roller kiln.

The technical scheme adopted by the invention for solving the technical problem is as follows: a cooling kiln section of a roller kiln comprises a quenching section kiln body, wherein cold air spray heads are arranged above and below an inner cavity of the quenching section kiln body and are arranged at intervals along the width direction of the quenching section kiln body, and the cold air spray heads are connected with an external quenching fan;

the cold air spray nozzle comprises a spray nozzle main body and an air supply core pipe, wherein the air supply core pipe is connected with an external quenching fan, an air outlet pan head is arranged at the end part of the spray nozzle main body, a plurality of groups of annular air outlets are arranged on the air outlet pan head in a step shape, the plurality of groups of annular air outlets are sleeved layer by layer from inside to outside in a vertical projection mode, a core pipe guide hole extending to the air outlet pan head is axially arranged in the cold air spray nozzle and is respectively communicated with different annular air outlets, the air supply core pipe is arranged in the core pipe guide hole in a sliding mode through the driving of an external driving mechanism, the other end of the air supply core pipe is connected with the external quenching fan, and the air supply core pipe is communicated with different annular air outlets one by one in the sliding process along the core pipe guide hole.

As preferred, equal circumference interval is equipped with the multiunit vortex convex part on the annular air outlet both sides lateral wall, is formed with the guiding gutter between the vortex convex part.

Preferably, the turbulence convex parts on the inner side wall and the outer side wall of the annular air outlet are staggered with each other.

Preferably, the vortex convex part horizontal position on vortex convex part and the lateral wall of annular air outlet inside wall is inequality.

Preferably, a flow distribution end portion for distributing the air flow to two sides is formed at the front end of the flow disturbance convex portion, flow distribution arc surfaces are formed on two sides of the flow distribution end portion, and the flow distribution arc surfaces extend to the flow guide grooves on two sides.

Preferably, the outer side of the spray head main body is coated with a heat insulation layer, and the heat insulation layer extends downwards to the air outlet pan head.

As preferred, the cooling kiln section still includes the slow cooling section kiln body and the fast cooling section kiln body, the fast cooling section kiln body links to each other according to the preface with the slow cooling section kiln body, the fast cooling section kiln body, all be equipped with the hot-blast suction inlet of multiunit along length direction about the inner chamber of the slow cooling section kiln body, hot-blast suction inlet is connected with outside suction fan, and wherein, the setting of dislocating is in the upper and lower side of slow cooling section kiln body inner chamber about the hot-blast suction inlet along slow cooling section kiln body length direction.

As preferred, all be equipped with the multiunit fast cold wind pipe along length direction about the inner chamber of the fast cold section kiln body, the fast cold wind pipe is connected with outside fast cold wind, the fast cold wind pipe transversely sets up along the width direction of the fast cold kiln body, is equipped with on the fast cold wind pipe along the length direction interval and is provided with multiunit air-out violently pipe, and the air-out is violently managed and is equipped with the fast cold air outlet of long and narrow form along its length direction.

Preferably, a plurality of groups of reversing flow guide convex parts are arranged on two sides of the quick cooling air outlet along the length direction at intervals in a staggered mode, and reversing guide grooves are formed among the reversing flow guide convex parts.

Preferably, the air outlet transverse pipe is perpendicular to the quick cooling air pipe, two groups of quick cooling air outlets are arranged on the air outlet transverse pipe, the two groups of quick cooling air outlets are symmetrically arranged on two sides of the air outlet transverse pipe, and the two groups of quick cooling air outlets are inclined towards one side away from the quick cooling air pipe.

The invention has the beneficial effects that: compared with the prior art, the adjustment of the air output and the air output range of the cold air nozzle is realized by matching the air supply core pipe with the air outlet pan head, the possibility of improving the control accuracy of the cooling temperature is further provided, after the real-time temperature measurement of the inner cavity of the kiln body is matched, the control accuracy of the cooling temperature can be further improved, the adjustment range and the adjustment accuracy are further improved compared with the adjustment of a conventional control valve, and the cooling forming quality of a product is further improved.

Drawings

FIG. 1 is a schematic cross-sectional view of an embodiment of the present invention;

FIG. 2 is a perspective view of a showerhead body according to an embodiment of the present invention;

FIG. 3 is an enlarged schematic view at A in FIG. 2;

FIG. 4 is a perspective view (partial) of an air supply core tube in an embodiment of the present invention;

FIG. 5 is a partially cut-away schematic view of a cold air blowing head according to an embodiment of the present invention;

FIG. 6 is a perspective view of a fast cooling air tube in an embodiment of the present invention;

FIG. 7 is a perspective view of the horizontal outlet duct according to the embodiment of the present invention;

FIG. 8 is an enlarged schematic view at B of FIG. 7;

fig. 9 is a schematic cross-sectional view of an air outlet duct according to an embodiment of the present invention.

In the figure, 10, a kiln body of a quenching section; 11. a cold air spray head; 12. a nozzle body; 13. an air outlet pan head; 14. an annular air outlet; 15. a turbulating protrusion; 16. a diversion trench; 17. a shunt end; 18. a flow-dividing arc surface; 21. an air supply core pipe; 22. the air outlet is communicated; 30. a slow cooling section kiln body; 31. a hot air suction port; 40. a fast cooling section kiln body; 41. a fast cooling air pipe; 42. a transverse air outlet pipe; 43. a quick cooling air outlet; 44. a reversing flow guide convex part; 45. and a reversing guide groove.

Detailed Description

The following description of the embodiments of the present invention will be made with reference to the accompanying drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, and is not intended to limit the present invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

As shown in fig. 1-9, the cooling kiln section of the roller kiln provided by the invention comprises a quenching section kiln body 10, wherein cold air nozzles 11 are respectively arranged above and below an inner cavity of the quenching section kiln body 10, a plurality of groups of cold air nozzles 11 are arranged at intervals along the width direction of the quenching section kiln body 10, the cold air nozzles 11 are connected with an external quenching fan, and external cold air is driven by the quenching fan to enter the quenching section kiln body 10 to cool a product;

the cold air spray nozzle 11 comprises a spray nozzle main body 12 and an air supply core pipe 21, the air supply core pipe 21 is connected with an external quenching fan, an air outlet pan head 13 is arranged at the end part of the spray nozzle main body 12, a plurality of groups of annular air outlets 14 are arranged on the air outlet pan head 13, a fixing flange is arranged at the other end of the spray nozzle main body 12, the spray nozzle main body 12 is fixed on the inner cavity of the quenching section kiln body 10 through the fixing flange, a heat insulation layer is coated outside the spray nozzle main body 12 and extends downwards to the air outlet pan head 13, the heat insulation layer is used for preventing external cold air from rapidly heating up in the front section of the spray nozzle main body 12 and influencing the quenching effect, wherein the plurality of groups of annular air outlets 14 are arranged in a step shape, the plurality of groups of annular air outlets 14 are sleeved layer by layer from inside to outside in a vertical projection manner, a core pipe guide hole extending to the air outlet pan head 13 is axially arranged in the cold air spray nozzle 11, the core pipe guide holes are respectively communicated with different annular air outlets 14, the air supply core pipe 21 is arranged in the core pipe guide hole in a sliding manner through the driving of an external driving mechanism, the side face of the front end of the air supply core pipe 21 is provided with a conduction air outlet 22, a driving mechanism can adopt a multi-position cylinder, an electric push rod and the like, the other end of the air supply core pipe 21 is connected with an external quenching fan, the air supply core pipe 21 is communicated with different annular air outlets 14 one by one in the sliding process of the core pipe guide hole, wherein when the driving mechanism drives the air supply core pipe 21 to slide relative to the air outlet pan head 13, the conduction air outlet 22 is sequentially communicated with the annular air outlets 14 on the air outlet pan head 13, and the communicated annular air outlets 14 are gradually increased, namely the air outlet amount and the air outlet range are gradually increased.

Compared with the prior art, the adjustment of the air output and the air output range of the cold air spray head 11 is realized by matching the air supply core pipe 21 with the air outlet pan head 13, the possibility of improving the control accuracy of the cooling temperature is further provided, the control accuracy of the cooling temperature can be further improved after the real-time temperature measurement of the inner cavity of the kiln body is matched, the adjustment range and the adjustment accuracy are further improved compared with the adjustment of a conventional control valve, and the cooling forming quality of a product is further improved.

Further, equal circumference interval is equipped with multiunit vortex convex part 15 on the 14 both sides lateral wall of annular air outlet, vortex convex part 15 on 14 inside walls of annular air outlet and the lateral wall misplaces each other, be formed with guiding gutter 16 between vortex convex part 15, 15 front ends of vortex convex part are formed with the reposition of redundant personnel tip 17 that makes the air current shunt to both sides, reposition of redundant personnel tip 17 both sides all are formed with reposition of redundant personnel cambered surface 18, reposition of redundant personnel cambered surface 18 extends to the guiding gutter 16 of both sides, carry out vortex and direction to cold wind through vortex convex part 15 and guiding gutter 16, improve the degree of consistency of cold wind dispersion, even it can cool down in step to get cold wind shower nozzle 11 correspondence region, improve the degree of consistency of cooling, it is inhomogeneous to avoid the local region cooling, influence the fashioned quality of product cooling.

Further, the vortex convex part 15 of the annular air outlet 14 inside wall is inequality with vortex convex part 15 horizontal position on the lateral wall, and through the vortex convex part 15 that appears the air outlet inside wall and vortex convex part 15 horizontal position's on the lateral wall dislocation from top to bottom, further improves the degree of consistency that cold wind disperses.

Furthermore, the cooling kiln section also comprises a slow cooling section kiln body 30 and a fast cooling section kiln body 40, the fast cooling section kiln body 10 is sequentially connected with the slow cooling section kiln body 30 and the fast cooling section kiln body 40, a plurality of groups of hot air suction ports 31 are respectively arranged above and below the inner cavity of the slow cooling section kiln body 30 along the length direction, and the hot air suction ports 31 are connected with an external suction fan, wherein the hot air suction ports 31 are arranged above and below the inner cavity of the slow cooling section kiln body 30 in a vertically staggered manner along the length direction of the slow cooling section kiln body 30, and hot air of the fast cooling section kiln body 10 and the fast cooling section kiln body 40 is driven to flow to the slow cooling section kiln body 30 through the suction of the external suction fan to slowly cool the product; all be equipped with multiunit fast cold air pipe 41 along length direction about the inner chamber of the fast cold section kiln body 40, fast cold air pipe 41 is connected with outside fast cold air blower, fast cold air pipe 41 transversely sets up along the width direction of the fast cold kiln body, it is provided with the horizontal pipe 42 of multiunit air-out along the length direction interval on the fast cold air pipe 41, be equipped with the fast cold air outlet 43 of long and narrow form along its length direction on the air-out horizontal pipe 42, outside fast cold air blower drives during outside cold wind gets into the fast cold kiln body, carry out further cooling to the product, through the cold wind export that sets up the horizontal pipe 42 of air-out and long and narrow form, enlarge the diffusion face of cold wind, when improving the cooling degree of consistency, reduce the quantity that sets up of fast cold air pipe 41.

Further, the crisscross spaced multiunit switching-over water conservancy diversion convex part 44 that is equipped with of length direction is followed to fast cold air outlet 43 both sides, switching-over water conservancy diversion convex part 44 is formed with switching-over guide slot 45 within a definite time, air-out violently manage 42 and fast cold air pipe 41 mutually perpendicular, be equipped with two sets of fast cold air outlet 43 on the air-out violently manages 42 both sides, two sets of fast cold air outlet 43 are the setting of symmetry on air-out violently manage 42 both sides, and to keeping away from fast cold air pipe 41 lopsidedness, the samely, carry out vortex and switching-over to cold wind through switching-over water conservancy diversion convex part 44 and switching-over guide slot 45, improve the degree of consistency of cold wind dispersion, even reach the wind and violently manage 42 corresponding region and can cool down in step, improve the degree of consistency of cooling, it is inhomogeneous to avoid the local region cooling, influence the fashioned quality of product cooling.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.

Claims (10)

1. The cooling kiln section of the roller kiln is characterized by comprising a quenching section kiln body (10), wherein cold air spray heads (11) are arranged above and below an inner cavity of the quenching section kiln body (10), a plurality of groups of cold air spray heads (11) are arranged at intervals along the width direction of the quenching section kiln body (10), and the cold air spray heads (11) are connected with an external quenching fan;

the cold air nozzle (11) comprises a nozzle main body (12) and an air supply core pipe (21), the air supply core pipe (21) is connected with an external quenching fan, an air outlet pan head (13) is arranged at the end part of the nozzle main body (12), a plurality of groups of annular air outlets (14) are arranged on the air outlet pan head (13), the annular air outlets (14) are arranged in a step shape, and a plurality of groups of annular air outlets (14) are sleeved layer by layer from inside to outside on the vertical projection, core pipe guide holes extending to the air outlet pan head (13) are axially arranged in the cold air nozzle (11), the core pipe guide holes are respectively communicated with different annular air outlets (14), an air supply core pipe (21) is arranged in the core pipe guide holes in a sliding manner under the driving of an external driving mechanism, the other end of the air supply core pipe (21) is connected with an external quenching fan, and the air supply core pipe (21) is communicated with different annular air outlets (14) one by one in the sliding process along the core pipe guide hole.

2. The cooling kiln section of the roller kiln according to claim 1, wherein a plurality of groups of turbulence convex portions (15) are circumferentially arranged on the side walls of the two sides of the annular air outlet (14) at intervals, and a diversion trench (16) is formed between the turbulence convex portions (15).

3. The cooling kiln section of a roller kiln according to claim 2, characterized in that the turbulating protrusions (15) on the inner and outer side walls of the annular air outlet (14) are offset with respect to each other.

4. The cooling kiln section of a roller kiln according to claim 2, wherein the turbulence protrusions (15) on the inner side wall of the annular air outlet (14) and the turbulence protrusions (15) on the outer side wall are not at the same level.

5. The cooling kiln section of the roller kiln according to claim 2, wherein a flow distribution end portion (17) for distributing air flow to both sides is formed at the front end of the flow distribution convex portion (15), flow distribution arc surfaces (18) are formed on both sides of the flow distribution end portion (17), and the flow distribution arc surfaces (18) extend to the flow guide grooves (16) on both sides.

6. The cooling kiln section of a roller kiln according to claim 1, characterized in that the outer side of the nozzle body (12) is coated with a heat insulating layer, which extends downwards to the air outlet pan head (13).

7. The cooling kiln section of the roller kiln according to claim 1, further comprising a slow cooling section kiln body (30) and a fast cooling section kiln body (40), wherein the fast cooling section kiln body (10) is sequentially connected with the slow cooling section kiln body (30) and the fast cooling section kiln body (40), a plurality of groups of hot air suction ports (31) are respectively arranged above and below the inner cavity of the slow cooling section kiln body (30) along the length direction, the hot air suction ports (31) are connected with an external suction fan, and the hot air suction ports (31) are arranged above and below the inner cavity of the slow cooling section kiln body (30) along the length direction of the slow cooling section kiln body (30) in a vertically staggered manner.

8. The cooling kiln section of the roller kiln according to claim 7, wherein a plurality of groups of fast cooling air pipes (41) are arranged above and below the inner cavity of the fast cooling kiln body (40) along the length direction, the fast cooling air pipes (41) are connected with an external fast cooling air blower, the fast cooling air pipes (41) are transversely arranged along the width direction of the fast cooling kiln body, a plurality of groups of transverse air outlet pipes (42) are arranged on the fast cooling air pipes (41) along the length direction at intervals, and the transverse air outlet pipes (42) are provided with elongated fast cooling air outlets (43) along the length direction.

9. The cooling kiln section of the roller kiln according to claim 8, wherein a plurality of groups of reversing flow guide protrusions (44) are arranged on two sides of the fast cooling air outlet (43) at intervals along the length direction in a staggered manner, and reversing guide grooves (45) are formed among the reversing flow guide protrusions (44).

10. The cooling kiln section of the roller kiln according to claim 8, wherein the cross-wind outlet pipe (42) and the fast cooling air pipe (41) are perpendicular to each other, two sets of fast cooling air outlets (43) are arranged on the cross-wind outlet pipe (42), and the two sets of fast cooling air outlets (43) are symmetrically arranged on two sides of the cross-wind outlet pipe (42) and are inclined towards the side far away from the fast cooling air pipe (41).

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