Convection plate structure and galvanizing annealing furnace

Abstract

The convection plate structure comprises a convection plate, the convection plate comprises an upper plate body and a lower plate body which are oppositely arranged, and a plurality of protruding blocks used for abutting against the upper plate body are fixedly arranged on the lower plate body; an annular channel is defined between the opening of the lower plate and the upper plate, and a flow channel radiating from the center to the annular channel is formed between every two adjacent protruding blocks. The spiral support is arranged on the annular channel and located between the two convection plates, and the height of the spiral support is adjustable; the vertical projection of the spiral support covers the annular channel. According to the convection plate structure and the galvanizing annealing furnace, hot air is dispersed through the arrangement of the flow channel, is finally discharged upwards through the annular channel and uniformly rises along the outer wall of a steel coil. And spiral airflow is generated under the guidance of the spiral bracket in the ascending process, so that the airflow speed is accelerated, and the convection efficiency is improved. And the height of the spiral support can be adjusted in a self-adaptive mode, and the device is suitable for steel coils of different specifications.

Description

Technical Field

[0001] This utility model relates to the field of liquid crystal panel technology, and more specifically to a convection plate structure and a galvanizing annealing furnace. Background Technology

[0002] The galvanizing annealing furnace is the core equipment in the production of galvanized steel sheets. It is used to perform heat treatment (annealing) and galvanizing processes on cold-rolled steel sheets. The convection plate is a key component for optimizing heat exchange and airflow distribution in the furnace. It is arranged according to the furnace body zones (preheating, heating, and cooling) to ensure temperature uniformity.

[0003] Based on publication number CN212533081U, published on February 12, 2021, a convection plate assembly for a bell-type annealing furnace is disclosed, including a vertically arranged support rod and three convection plates rotatably arranged on the support rod. The convection plates are arranged along the length of the support rod, making the convection plates an integral unit. This eliminates the need to hoist and stack the convection plates one by one, simplifying the operation and improving work efficiency.

[0004] In the prior art, including the aforementioned patent, the main openings of the convection plate are concentrated in the middle, which causes the airflow to blow preferentially to the end. Subsequently, the airflow spreads along the end to the outer wall, resulting in a relatively slow heating rate of the outer wall of the steel coil and low convection efficiency. Utility Model Content

[0005] The purpose of this invention is to provide a convection plate structure and a galvanizing annealing furnace to solve the above-mentioned problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a convection plate structure, comprising a convection plate, which includes an upper plate and a lower plate arranged opposite to each other, and a plurality of protrusions for abutting against the upper plate are fixedly provided on the lower plate;

[0007] The opening of the lower plate and the upper plate enclose each other to form an annular channel, and the adjacent protrusions form a flow channel radiating from the center to the annular channel;

[0008] The spiral support is installed on the annular channel, located between two convection plates and is height adjustable;

[0009] The vertical projection of the spiral support covers the annular channel.

[0010] Preferably, it also includes a lower support rod arranged in a circumferential array on the annular channel, which is used to support the spiral support.

[0011] Preferably, an upper support rod is slidably mounted on the lower support rod, and the upper support rod is threaded with bolts for limiting the spiral bracket.

[0012] Preferably, the upper plate is provided with a plurality of diversion grooves that bulge towards the lower plate, and the diversion grooves are engaged with the protrusions.

[0013] Preferably, the inner wall of the diversion channel is provided with side holes on both sides.

[0014] Preferably, the upper plate is provided with a recess for guiding the accumulation of sediment.

[0015] Preferably, the lower plate is provided with an opening for directing hot air to the opening.

[0016] Preferably, the bump has a narrow end and a wide end, and the direction of inclination from the narrow end to the wide end is consistent with the upward rotation of the spiral support.

[0017] Preferably, the protrusion has through holes at both ends.

[0018] A galvanizing annealing furnace, comprising a convection plate structure as described in any of the above embodiments.

[0019] In the above technical solution, the convection plate structure and galvanizing annealing furnace provided by this utility model have the following beneficial effects: the hot air is dispersed through the flow channel and finally discharged upward through the annular channel, rising evenly along the outer wall of the steel coil. Furthermore, during the upward process, the spiral airflow is generated by the guidance of the spiral support, accelerating the airflow speed and improving convection efficiency. The height of the spiral support can be adaptively adjusted, making it suitable for steel coils of different specifications. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0021] Figure 1 A three-dimensional schematic diagram of the overall embodiment of this utility model;

[0022] Figure 2 A schematic diagram of the convection plate structure inside the furnace provided in this embodiment of the utility model;

[0023] Figure 3 A schematic diagram of the convection plate and spiral support structure provided in an embodiment of this utility model;

[0024] Figure 4 This is a schematic diagram of the cross-sectional structure of the upper and lower plates provided in an embodiment of the present utility model;

[0025] Figure 5 A schematic diagram of the upper plate and flow channel provided for an embodiment of this utility model.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Furnace body; 2. Spiral support; 21. Upper support rod; 22. Lower support rod; 23. Bolt; 24. Screw hole; 3. Convection plate; 31. Upper plate; 32. Lower plate; 33. Diversion groove; 34. Side hole; 35. Recess; 36. Protrusion; 37. Opening; 38. Rib; 39. Clip interface. Detailed Implementation

[0028] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0029] like Figure 1-5 As shown, a convection plate structure and a galvanizing annealing furnace include a furnace body 1, including a convection plate 3, which includes an upper plate 31 and a lower plate 32 arranged opposite to each other, and a plurality of protrusions 36 for abutting against the upper plate 31 are fixedly provided on the lower plate 32.

[0030] The opening of the lower plate 32 and the upper plate 31 enclose each other to form an annular channel, and the adjacent protrusions 36 form a flow channel radiating from the center to the annular channel;

[0031] The spiral support 2 is installed on the annular channel, and it is located between two convection plates 3 and its height is adjustable;

[0032] The vertical projection of the spiral support 2 covers the annular channel.

[0033] Specifically, the convection plate 3 and the spiral support 2 are coaxially sleeved in the heating zone of the furnace body 1, and a fan for air intake is provided at the bottom of the heating zone. Both the spiral support 2 and the convection plate 3 are made of metal materials resistant to high temperature and corrosion.

[0034] Furthermore, the spiral support 2 possesses a certain degree of flexibility; the spiral structure has room for expansion and contraction in the axial direction, acting like a spring. When galvanizing and annealing multi-layer steel coils, the steel coil is first placed in a... Figure 2 On the bottom convection plate 3 shown, the spiral support 2, which has an initial height higher than the steel coil, is then movably assembled onto the annular channel. Another convection plate 3 is then placed on the top of the spiral support 2. The weight of the upper convection plate 3 causes the spiral support 2 to adaptively retract to the same height as the steel coil. This method is applicable to steel coils of different specifications and meets actual production needs.

[0035] When the system starts operating, the blower blows hot air from bottom to top. The hot air extends along the bottom surface of the upper plate 31 in all directions through the opening in the lower plate 32. Because the protrusion 36 abuts against the upper plate 31, a gap is formed between the upper plate 31 and the lower plate 32 for airflow. During the extension process, the airflow is blocked and diverted by the protrusion 36, and this diverted flow diffuses outwards along the flow channel. The outer diameter of the opening in the lower plate 32 is larger than that in the upper plate 31, so that the edge of the opening surrounds the upper plate 31 and maintains a distance from it, forming an open annular channel at the top. The airflow extends out of the upper plate 31 along the flow channel, then enters the annular channel and is discharged upwards. This allows the hot air to enter from the bottom and diffuse outwards, preventing the protective gas flow from passing entirely through the steel coil stack cavity, which would affect furnace temperature uniformity and annealing capacity. Finally, the airflow rises evenly along the outer wall of the steel coil, and during this ascent, it is guided by the spiral support 2 to generate a spiral airflow, accelerating the airflow speed and improving convection efficiency.

[0036] In the aforementioned technology, the hot air is dispersed through the flow channel and ultimately discharged upwards through the annular channel, rising evenly along the outer wall of the steel coil. Furthermore, during the ascent, the spiral airflow is guided by the spiral support 2, generating a spiral airflow that accelerates the airflow speed and improves convection efficiency. The height of the spiral support 2 can be adaptively adjusted to suit steel coils of different specifications.

[0037] As a further embodiment of this utility model, it also includes a lower support rod 22 arranged in a circumferential array on the annular channel, which is used to support the spiral bracket 2.

[0038] Specifically, multiple lower support rods 22 are threaded onto the spiral bracket 2, and the bottom ends of the lower support rods 22 are fitted to the edge of the lower plate 32 by means of snap-fit ​​or threaded connection, so that the bottom ends of the lower support rods 22 are located in the annular channel between the opening of the lower plate 32 and the upper plate 31. The arrangement of multiple lower support rods 22 can play an auxiliary limiting role for the spiral bracket 2, so that the spiral bracket 2 can only extend and retract vertically along the surface of the lower support rods 22, thus preventing the spiral bracket 2 from tilting and becoming unstable.

[0039] As another embodiment of this utility model, an upper support rod 21 is slidably disposed on the lower support rod 22, and a bolt 23 for limiting the spiral bracket 2 is threadedly connected to the upper support rod 21.

[0040] Specifically, the top end of the lower support rod 22 extends and inserts into the upper support rod 21, and the upper support rod 21 has multiple screw holes 24 for mounting bolts 23. The bottom end of the spiral bracket 2 is welded to the lower plate 32. In the default state, the spiral bracket 2 is retracted, and at this time the height of the spiral bracket 2 is relatively short. The steel coil can be hoisted to a height higher than the spiral bracket 2 and placed on the upper plate 31. Then, the lower support rod 22 is inserted along the preset slot on the spiral bracket 2, so that the bottom end of the lower support rod 22 is assembled with the lower plate 32.

[0041] Then, insert the upper support rod 21 along the slot, so that the upper support rod 21 and the lower support rod 22 are correspondingly inserted. Stretch the upper end of the spiral bracket 2 upwards to the required height, extending the spiral bracket 2 to the desired height. Screw in bolts 23 into the screw holes 24 of the upper support rod 21 near the spiral bracket 2. The bolts 23 hold the spiral bracket 2 in place, ensuring its height remains constant. Then, based on the current shape of the spiral bracket 2, screw in bolts 23 into the screw holes 24 of the other upper support rods 21 to further support the spiral bracket 2 and prevent it from shrinking. Figure 3 As shown. And by screwing in the bolt 23, the part of the bolt 23 that is screwed into the upper support rod 21 abuts against the top of the lower support rod 22, fixing the distance between the upper support rod 21 and the lower support rod 22.

[0042] As another embodiment provided in this utility model, the upper plate 31 is provided with a plurality of diversion grooves 33 that protrude toward the lower plate 32, and the diversion grooves 33 are engaged with the protrusions 36.

[0043] Specifically, the diversion groove 33 has a locking interface 39 extending to the edge of the upper plate 31, and the protrusion 36 has ribs 38 on both sides corresponding to the locking interface 39. The locking interface 39 is located in the middle of the diversion groove 33. When assembling the upper plate 31 and the lower plate 32, the locking interface 39 is placed in the corresponding position to the protrusion 36, and the protrusion 36 extends into the diversion groove 33. The protrusion 36 and the diversion groove 33 are locked together. At high temperatures, the grease, iron powder or impurities remaining on the surface of the steel coil carbonize to form coke, which will accumulate in the diversion groove 33 under the action of gravity, and bond the diversion groove 33 to the protrusion 36. At this time, it is only necessary to separate the upper plate 31 and the lower plate 32 to break the clump between the diversion groove 33 and the protrusion 36, thereby destroying the overall structure of the coke and making it easier to clean.

[0044] As another embodiment provided in this utility model, side holes 34 are provided on both sides of the inner wall of the diversion channel 33.

[0045] Specifically, residual grease, iron powder, or impurities on the surface of the steel coil will fall into the bottom of the diversion groove 33 due to gravity during the initial heating stage, forming coke as it carbonizes at high temperature. Impurities on both sides of the diversion groove 33 remain less, with most reaching the bottom along the sidewalls. Therefore, the side holes 34 on both sides can avoid being blocked by carbon buildup. When hot air reaches the bottom of the upper plate 31 through the lower plate 32, it is blocked by the raised diversion groove 33, creating a flow channel between the diversion grooves 33 (since the protrusions 36 are located in the middle of the diversion groove 33, the flow channel is still located between the two protrusions 36). After entering the flow channel, part of the hot air enters the annular channel along the flow channel, while the other part enters the diversion groove 33 along the side holes 34 to blow air onto the end face of the steel coil, guiding the high-temperature airflow to evenly cover the steel plate surface, reducing localized overheating or cooling.

[0046] As another embodiment of this utility model, the upper plate 31 is provided with a recess 35 for guiding the accumulation of sediment.

[0047] Specifically, the lower plate 32 is provided with an opening 37 for guiding hot air to the inlet. The opening 37 corresponds to the position of the recess 35, so that during the placement of the upper plate 31, the recess 35 is guided by the opening 37 and stabilized in the central position. Furthermore, the recess 35 can collect carbon deposits on the end face of the steel coil, preventing carbon deposits from falling to the hot air inlet below.

[0048] As another embodiment further provided in this utility model, the protrusion 36 has a narrow end and a wide end, and the direction of inclination from the narrow end to the wide end is consistent with the bottom-to-top rotation of the spiral bracket 2.

[0049] Specifically, the hot air extends along the bottom surface of the upper plate 31 through the opening 37, and then is blocked by the protrusion 36 and flows along the side wall of the protrusion 36 into the annular channel. At this time, the flow direction extends from the narrow end to the wide end of the protrusion 36, which is consistent with the spiral direction from the bottom end to the top end of the spiral support 2, so that the airflow has a rotational tendency in the annular channel, thereby enabling it to flow better along the spiral support 2.

[0050] As another embodiment provided in this utility model, the protrusion 36 has through holes at both ends.

[0051] Specifically, after the hot air reaches the bottom of the upper plate 31 through the lower plate 32, the hot air is blocked by the raised diversion groove 33, making the gap between the diversion grooves 33 a flow channel (since the protrusion 36 is set in the middle of the diversion groove 33, the flow channel is still located between the two protrusions 36). After the hot air enters the flow channel, part of it enters the annular channel along the flow channel, and part of it enters the diversion groove 33 along the side hole 34 to blow the end face of the steel coil. At this time, the airflow in the diversion groove 33 will flow from the narrow end of the protrusion 36 to the wide end, which is consistent with the spiral direction from the bottom end to the top end of the spiral support 2. Then, this part of the airflow merges into the annular channel and finally flows along the spiral support 2.

[0052] Working principle: When assembling the convection plate 3 and the spiral support 2, the bottom end of the spiral support 2 is welded to the lower plate 32. In the default state, the spiral support 2 is retracted. At this time, the height of the spiral support 2 is relatively short. The steel coil can be hoisted to a height higher than the spiral support 2 and then placed on the upper plate 31. Then, the lower support rod 22 is inserted along the preset slot on the spiral support 2, so that the bottom end of the lower support rod 22 is assembled with the lower plate 32.

[0053] Then, insert the upper support rod 21 along the slot, so that the upper support rod 21 and the lower support rod 22 are correspondingly inserted. Stretch the upper end of the spiral bracket 2 upwards to the required height, extending the spiral bracket 2 to the desired height. Screw in bolts 23 into the screw holes 24 of the upper support rod 21 near the spiral bracket 2. The bolts 23 hold the spiral bracket 2 in place, ensuring its height remains constant. Then, based on the current shape of the spiral bracket 2, screw in bolts 23 into the screw holes 24 of the other upper support rods 21 to further support the spiral bracket 2 and prevent it from shrinking. Figure 3 As shown. And by screwing in the bolt 23, the part of the bolt 23 that is screwed into the upper support rod 21 abuts against the top of the lower support rod 22, fixing the distance between the upper support rod 21 and the lower support rod 22.

[0054] During operation, hot air extends along the bottom surface of the upper plate 31 through the opening 37, and then flows into the annular channel along the side wall of the protrusion 36 due to the obstruction of the protrusion 36. The hot air is blocked by the raised diversion grooves 33, making the gap between the diversion grooves 33 a flow channel (since the protrusion 36 is located in the middle of the diversion groove 33, the flow channel is still located between the two protrusions 36). After the hot air enters the flow channel, part of it enters the annular channel along the flow channel, and part of it enters the diversion groove 33 through the side hole 34 to blow on the end face of the steel coil.

[0055] Subsequently, the airflow in the diversion groove 33 will flow from the narrow end of the protrusion 36 to the wide end, which is consistent with the spiral direction from the bottom to the top of the spiral support 2. Then, this part of the airflow will merge into the annular channel and have a rotational tendency, so that it can flow better along the spiral support 2.

[0056] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A counterflow plate structure, characterized in that It includes a convection plate (3), which includes an upper plate (31) and a lower plate (32) arranged opposite to each other, and a plurality of protrusions (36) for abutting against the upper plate (31) are fixedly provided on the lower plate (32); The opening of the lower plate (32) and the upper plate (31) enclose each other to form an annular channel, and the adjacent protrusions (36) form a flow channel radiating from the center to the annular channel; The spiral support (2) is set on the annular channel, which is located between two convection plates (3) and is height adjustable; The vertical projection of the spiral support (2) covers the annular channel.

2. A convection panel structure according to claim 1, wherein It also includes a lower support rod (22) arranged in a circumferential array on the annular channel, which is used to support the spiral support (2).

3. A convection panel structure according to claim 2, wherein, The lower support rod (22) is slidably provided with an upper support rod (21), and the upper support rod (21) is threaded with a bolt (23) for limiting the spiral bracket (2).

4. A convection panel structure according to claim 1, wherein The upper plate (31) is provided with a plurality of diversion grooves (33) that protrude toward the lower plate (32), and the diversion grooves (33) are engaged with the protrusions (36).

5. A convection panel structure according to claim 4, wherein, Side holes (34) are provided on both sides of the inner wall of the diversion channel (33).

6. A convection panel structure according to claim 1, wherein The upper plate (31) is provided with a recess (35) for guiding the accumulation of sediment.

7. A convection panel structure according to claim 1, wherein The lower plate (32) is provided with an opening (37) for guiding hot air to the opening.

8. A convection panel structure according to claim 1, wherein The protrusion (36) has a narrow end and a wide end, and the direction of inclination from the narrow end to the wide end is consistent with the upward rotation of the spiral support (2).

9. A convection panel structure according to claim 1, wherein The protrusion (36) has through holes at both ends.

10. A galvannealing furnace comprising a furnace body (1), characterized in that, The convection plate structure includes any one of claims 1-9 above.

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