Section steel hot dipping flue gas collecting device

Abstract

The utility model relates to a section steel hot dipping flue gas collecting device, and belongs to the technical field of section steel hot dipping environment-friendly control in the metallurgical industry. According to the technical scheme, an access hole matched with a stepping device (8) and profile steel (19) is formed in the side face of a zinc pot (10), an air suction cover (4) covers the zinc pot (10), a steering chain wheel (3) is fixed to the air suction cover (4), one end of a chain (2) is fixedly connected with a lifting door (1), the lifting door (1) is matched with the access hole in the side face of the zinc pot (10), and the other end of the chain (2) is reversed through the steering chain wheel (3) and then connected with a large rotating arm (6). The large rotating arm (6) is mounted on a rotating shaft (7); and the rotating shaft (7) is connected with the head of the cylinder (5) through a push rod (9). The lifting door has the beneficial effects that the lifting door is additionally arranged in the access hole area of equipment on the side surface of the zinc pot, the lifting door is lifted when equipment for feeding steel into the zinc pot passes through, and the lifting door is lowered when the steel is galvanized, so that smoke is prevented from overflowing from the access hole area.

Description

Technical Field

[0001] This utility model relates to a fume collection device for hot-dip galvanizing of steel profiles, belonging to the field of environmental protection control technology for hot-dip galvanizing of steel profiles in the metallurgical industry. Background Technology

[0002] Currently, there are two main types of fume collection devices used in hot-dip galvanizing of steel profiles: one type involves installing a collection hood above the zinc pot, with the pipe suction port extending vertically upwards from the hood, followed by dust removal and ammonia desulfurization before emission; the other type involves opening holes on the steel inlet and outlet sides of the zinc pot to allow space for the steel profiles to enter and exit, while the remaining side facades are sealed off and enclosed, with the height of the zinc pot area cleared for equipment. This structure requires a high-power induced draft fan. Alternatively, the suction port can be lowered, with suction ports added on both sides of the zinc pot along its long side, thus drawing away zinc fumes closer to the source and reducing the chance of overflow. The fan power can also be relatively smaller. However, if the openings of the equipment inlet and outlet of the zinc pot are large, this structure can easily lead to air leakage and environmental pollution. Utility Model Content

[0003] The purpose of this utility model is to provide a hot-dip galvanizing fume collection device for steel profiles. A lifting door is added to the inlet and outlet area of ​​the equipment on the side of the zinc pot. When the equipment that feeds steel into the zinc pot passes by, the lifting door is raised, and when the steel is being galvanized, the lifting door is lowered to prevent the fume from overflowing from this opening, thus solving the problems existing in the background art.

[0004] The technical solution of this utility model is:

[0005] A hot-dip galvanizing fume collection device for steel profiles includes a lifting door, a chain, a steering sprocket, a suction hood, a cylinder, a large rotating arm, a rotating shaft, a stepping device, a push rod, and a zinc pot. The side of the zinc pot has an inlet / outlet opening that mates with the stepping device and the steel profile. The suction hood covers the zinc pot, and the steering sprocket is fixed to the suction hood. One end of the chain is fixedly connected to the lifting door, which mates with the inlet / outlet opening on the side of the zinc pot. The other end of the chain is connected to the large rotating arm after being reversed by the steering sprocket. The large rotating arm is mounted on the rotating shaft, and the rotating shaft is connected to the cylinder head via the push rod.

[0006] Furthermore, the lifting door is slidably connected to the zinc pot column.

[0007] Furthermore, the suction hood is a mesh frame structure that works in conjunction with the zinc pot, with steel plates welded around its perimeter.

[0008] Furthermore, the suction hood is connected to the dust removal device and the induced draft fan via a pipe.

[0009] The beneficial effects of this utility model are: a lifting door is added to the inlet and outlet area of ​​the galvanizing equipment on the side of the zinc pot. When the equipment that feeds steel into the zinc pot passes by, the lifting door is raised, and when the steel is being galvanized, the lifting door is lowered to prevent smoke from escaping from this opening. Attached Figure Description

[0010] Figure 1 This is the front view of the present utility model;

[0011] Figure 2 This is a top view of the present invention;

[0012] Figure 3 This is the left view of the present invention;

[0013] In the diagram: 1. Lifting door; 2. Chain; 3. Steering sprocket; 4. Suction hood; 5. Cylinder; 6. Large rotating arm; 7. Rotating shaft; 8. Stepping device; 9. Push rod; 10. Zinc pot; 11. Galvanizing machine; 12. Solenoid valve; 13. Dust removal device; 14. Detection switch; 15. Crossbeam; 16. Exhaust fan; 17. Zinc pot column; 19. Structural steel. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and examples.

[0015] See attached document Figure 1-3 A hot-dip galvanizing fume collection device for steel profiles includes a lifting door 1, a chain 2, a steering sprocket 3, a suction hood 4, a cylinder 5, a large rotating arm 6, a rotating shaft 7, a stepping device 8, a push rod 9, and a zinc pot 10. The side of the zinc pot 10 is provided with an inlet / outlet opening that cooperates with the stepping device 8 and the steel profile 19. The suction hood 4 covers the zinc pot 10. The steering sprocket 3 is fixed on the suction hood 4. One end of the chain 2 is fixedly connected to the lifting door 1. The lifting door 1 cooperates with the inlet / outlet opening on the side of the zinc pot 10. The other end of the chain 2 is connected to the large rotating arm 6 after being reversed by the steering sprocket 3. The large rotating arm 6 is mounted on the rotating shaft 7. The rotating shaft 7 is connected to the head of the cylinder 5 via the push rod 9.

[0016] In this example, refer to the appendix. Figure 1-3 The flue gas collection device includes a lifting door 1, a chain 2, a steering sprocket 3, a suction hood 4, a cylinder 5, a large rotating arm 6, a rotating shaft 7, a stepping device 8, a push rod 9, a zinc pot 10, a galvanizing machine 11, a solenoid valve 12, a dust removal device 13, a detection switch 14, a crossbeam 15, an induced draft fan 16, and a zinc pot column 17, wherein:

[0017] The zinc pot 10 has an inlet / outlet for the galvanizing equipment on its side, as shown in the attached diagram. Figure 3 As shown.

[0018] The suction hood 4 is installed directly above the zinc pot 10. The top is a conventional mesh frame structure, and the surrounding area is protected by welded steel plates. The lifting door 1 uses the zinc pot column 17 on the side of the entrance and exit as the lifting guide slide. The lifting door 1 is a welded frame structure, which is welded to the end of the chain 2. The chain 2 is connected to the large rotating arm 6 after being reversed by the steering sprocket 3. The large rotating arm 6 is installed on the rotating shaft 7. The rotating shaft 7 is connected to the head of the telescopic cylinder 5 via the push rod 9.

[0019] The working principle of this utility model is as follows:

[0020] When the stepping device 8 feeds steel to the zinc pot 10, the signal is sent to the solenoid valve 12, and the cylinder 5 takes in air in the rod chamber. The push rod 9 drives the rotating shaft 7 and the large rotating arm 6 fixed on the rotating shaft 7 to rotate counterclockwise. The large rotating arm 6 pulls the chain 2 to move upward, raising the lifting door 1. When the detection switch 14 installed around the rotating shaft is triggered, the signal is sent to the solenoid valve 12, and the air intake in the rod chamber stops. At this time, the cylinder is locked and does not move, and the lifting door 1 is raised to the high position and stops.

[0021] After cylinder 5 reaches its position, the position signal is sent to stepping device 8, which then starts to feed steel into the zinc pot and transfers the steel to galvanizing machine 12.

[0022] When the stepper device 8 returns to its original position without load, the return signal is sent to the solenoid valve 12. Then, the rodless chamber of the cylinder 5 is filled with air, the push rod 9 is pulled back, and the large rotating arm 6 rotates clockwise. The lifting door 1 descends under the action of gravity and the thrust of the chain 2, blocking the equipment entrance and exit of the zinc pot 10, forming a closed area above and around the zinc pot 10.

[0023] The galvanizing machine 11 descends and submerges the steel profile into the zinc pot 10. After about 2 to 3 seconds, bluish-white zinc fumes quickly overflow from below the liquid surface and spread rapidly in the area above the zinc pot. Finally, guided by the negative pressure area formed by the top fan, the fumes are drawn from the side suction port into the ventilation and environmental protection device 13, where particulate matter in the fumes is collected, treated to meet standards, and then discharged into the atmosphere.

Claims

1. A device for collecting fumes from hot-dip galvanized steel sections, characterized in that: It includes a lifting door (1), a chain (2), a steering sprocket (3), a suction hood (4), a cylinder (5), a large rotating arm (6), a rotating shaft (7), a stepping device (8), a push rod (9), and a zinc pot (10). The side of the zinc pot (10) is provided with an entrance and exit opening that cooperates with the stepping device (8) and the steel section (19). The suction hood (4) covers the zinc pot (10). The steering sprocket (3) is fixed on the suction hood (4). One end of the chain (2) is fixedly connected to the lifting door (1). The lifting door (1) cooperates with the entrance and exit opening on the side of the zinc pot (10). The other end of the chain (2) is connected to the large rotating arm (6) after being reversed by the steering sprocket (3). The large rotating arm (6) is installed on the rotating shaft (7). The rotating shaft (7) is connected to the head of the cylinder (5) through the push rod (9).

2. The hot-dip galvanizing fume collection device for structural steel according to claim 1, characterized in that: The lifting door (1) is slidably connected to the zinc pot column (17).

3. The hot-dip galvanizing fume collection device for structural steel according to claim 2, characterized in that: The suction hood (4) is a mesh structure that works in conjunction with the zinc pot (10), and is surrounded by welded steel plates.

4. The hot-dip galvanizing fume collection device for structural steel according to claim 1, characterized in that: The suction hood (4) is connected to the dust removal device (13) and the induced draft fan (16) through a pipe.

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