Liquid level control structure for zinc liquid in zinc boiler nose

Abstract

The utility model discloses a liquid level control structure for liquid zinc in a zinc boiler nose, which relates to the technical field of steel strip galvanizing and comprises a zinc pot, liquid zinc is arranged in the zinc pot, and the furnace nose is arranged in the zinc pot. An overflow vertical plate is detachably installed in the lower end of the furnace nose, the upper end of the overflow vertical plate is flush with the liquid level of molten zinc, an overflow groove with an opening in the upper end is formed between the overflow vertical plate and the lower end of the inner wall of the furnace nose, and an ash suction pump is arranged outside the furnace nose and used for pumping the molten zinc overflowing into the overflow groove. According to the hot galvanizing furnace nose, the pipeline extends into the furnace nose cavity, so that zinc ash and zinc slag on the surface of zinc liquid in the hot galvanizing furnace nose can be effectively removed; the device has the advantages of being simple in structure and convenient to use, is suitable for being installed and used on a galvanizing production line, greatly improves the plating quality and the yield of the steel belt, and has high economic benefits and social benefits.

Description

Technical Field

[0001] The utility model relates to the technical field of steel strip galvanizing, in particular to a zinc liquid level control structure in the nose of a zinc boiler. Background Art

[0002] In order to reduce the corrosion of steel materials, people have adopted a variety of anti-corrosion methods, among which the method of coating a protective layer on the surface of steel is the most common method. Since zinc has good corrosion resistance in the atmosphere and is a relatively cheap metal, it is relatively cheap to protect steel with a zinc layer, which has also promoted the development of the hot-dip galvanizing industry and has become the most widely used metal rust prevention method.

[0003] High-temperature zinc liquid will automatically generate zinc smoke in the zinc pot, and the zinc smoke inside the furnace nose will also adhere to the furnace nose and condense into zinc ash. The accumulation of zinc ash shortens the service life of the equipment and is easily shaken into the zinc liquid. The zinc ash that falls will contaminate the liquid surface of the zinc liquid inside the furnace nose, and with the continuous galvanizing of the steel strip, it will be brought to the surface of the strip, causing zinc slag and zinc ash defects on the strip. These defects will seriously affect the surface quality of the strip.

[0004] In view of this, this application is hereby filed. Utility Model Content

[0005] The utility model aims to provide a zinc liquid level control structure in the nose of a zinc boiler to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the utility model provides a zinc liquid level control structure in a zinc boiler nose, comprising a zinc pot, wherein zinc liquid is arranged inside the zinc pot, and a furnace nose is arranged inside the zinc pot; an overflow vertical plate is detachably installed in the lower end of the furnace nose, and the upper end of the overflow vertical plate is flush with the zinc liquid level, and an overflow trough with an open upper end is formed between the overflow vertical plate and the lower end of the inner wall of the furnace nose, and an ash suction pump is arranged outside the furnace nose, and the ash suction pump is used to extract the zinc liquid overflowing into the overflow trough.

[0007] Furthermore, the ash suction pump is connected to an ash suction pipe and a discharge pipe, the end of the ash suction pipe away from the ash suction pump is connected to the bottom of the overflow tank, and the end of the discharge pipe away from the ash suction pump is connected to the zinc liquid outside the furnace nose.

[0008] Furthermore, a conveying roller is provided inside the zinc pot, on which a steel strip is transmitted, and the steel strip is passed through the inside of the furnace nose.

[0009] Furthermore, the furnace nose is arranged obliquely along the traveling direction of the steel strip, the furnace nose is a flat cylindrical structure penetrating from top to bottom, and the lower end of the furnace nose is immersed in the zinc liquid.

[0010] Furthermore, a collecting plate is provided in the furnace nose, the upper end of which is higher than the liquid level of the zinc liquid, and a collecting trough with an open upper end is formed between the collecting plate and the lower end of the inner side of the furnace nose.

[0011] Furthermore, the overflow vertical plate includes a connecting arm detachably fixed to the outer side wall of the furnace nose, one end of the connecting arm extending to the inside of the furnace nose is fixedly connected to a support plate, and an end plate is embedded and installed on the outside of the support plate.

[0012] Furthermore, the support plate is threadedly connected to a fixing bolt, the end plate is provided with a threaded blind hole for the fixing bolt to be screwed into, and the end plate is fixed to the support plate by the fixing bolt.

[0013] Furthermore, a straight slot is provided on the side wall of the connecting arm along its length direction, a straight screw is inserted into the inside of the straight slot, one end of the straight screw is fixed to the outer wall of the furnace nose, a nut is threadedly connected to the straight screw, and the connecting arm is fixed to the side wall of the furnace nose through the cooperation of the straight screw and the nut.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] 1. In the utility model, after the steel strip contacts the zinc liquid, a certain amount of zinc slag will be generated above the zinc liquid level inside the furnace nose, and the zinc slag will be driven by the zinc liquid to overflow into the overflow trough, and then be pumped out through the ash suction pipe by the ash suction pump for processing and recovery, and then the zinc ash and impurities in the overflow trough are discharged to the outside of the furnace nose by the discharge pipe, so that the zinc liquid in the furnace nose can be continuously replaced to improve the purity of the zinc liquid.

[0016] 2. The utility model can form an overflow groove inside the furnace nose by cooperating with the inner wall of the furnace nose through the overflow vertical plate, and when the overflow vertical plate is damaged, the end plate can be replaced separately, and the height and horizontality of the movable end plate can be flexibly adjusted through the connecting arm, which greatly improves the slag discharge effect and efficiency of the furnace nose, extends the replacement cycle of the furnace nose, reduces the spare parts cost and labor cost of the furnace nose, and improves the efficiency of the production enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the furnace nose structure in the utility model;

[0019] Figure 3 It is a structural schematic diagram of the overflow vertical plate in the utility model.

[0020] In the figure: 1. zinc pot; 2. zinc liquid; 3. conveying roller; 4. furnace nose; 5. steel belt; 6. overflow trough; 7. overflow vertical plate; 71. end plate; 72. support plate; 73. fixing bolt; 74. connecting arm; 75. straight slot; 76. straight screw; 77. nut; 8. collecting trough; 9. collecting vertical plate; 10. ash extraction pipe; 11. ash suction pump; 12. discharge pipe. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-Figure 3 The utility model provides a technical solution: a zinc liquid level control structure in a zinc boiler nose, comprising a zinc pot 1, wherein zinc liquid 2 is arranged inside the zinc pot 1, and a furnace nose 4 is arranged inside the zinc pot 1; an overflow vertical plate 7 is detachably installed in the lower end of the furnace nose 4, and the upper end of the overflow vertical plate 7 is flush with the liquid level of the zinc liquid 2, and an overflow trough 6 with an upper end opening is formed between the overflow vertical plate 7 and the lower end of the inner wall of the furnace nose 4, and an ash suction pump 11 is arranged outside the furnace nose 4, and the ash suction pump 11 is used to extract the zinc liquid 2 overflowing into the overflow trough 6, and the ash suction pump 11 is connected to an ash suction pipe 10 and a discharge pipe 12, and the end of the ash suction pipe 10 away from the ash suction pump 11 is connected to the bottom of the overflow trough 6, and the end of the discharge pipe 12 away from the ash suction pump 11 is connected to the zinc liquid 2 outside the furnace nose 4.

[0023] Specifically, after the steel strip 5 comes into contact with the zinc liquid 2, a certain amount of zinc slag will be produced above the liquid surface of the zinc liquid 2 inside the furnace nose 4. The zinc slag will be driven by the zinc liquid 2 to overflow into the overflow trough 6, and then be extracted and recycled by the ash suction pump 11 through the ash suction pipe 10, and then the zinc ash and impurities in the overflow trough 6 will be discharged to the outside of the furnace nose 4 through the discharge pipe 12, so that the zinc liquid 2 in the furnace nose 4 can be continuously replaced to improve the purity of the zinc liquid 2.

[0024] See also Figure 1 A conveyor roller 3 is also provided inside the zinc pot 1, on which a steel belt 5 is transmitted. The steel belt 5 is passed through the inside of a furnace nose 4. The furnace nose 4 is arranged obliquely along the traveling direction of the steel belt 5. The furnace nose 4 is a flat cylindrical structure that passes through from top to bottom, and the lower end of the furnace nose 4 is immersed in the zinc liquid 2.

[0025] Specifically, the conveying roller 3 and the furnace nose 4 cooperate to guide the steel strip 5 into the zinc liquid 2 inside the zinc pot 1, ensuring that the zinc liquid 2 is steadily immersed in the zinc liquid 2 at a correct angle and posture when entering the galvanizing process; this helps to achieve a uniform galvanizing effect and avoid the deviation, shaking, etc. of the zinc liquid 2 during the entry process, thereby ensuring the quality and uniformity of the coating.

[0026] It should be noted that the position and direction of the steel strip 5 in the zinc liquid 2 are controlled by the furnace nose 4: during the galvanizing process, the furnace nose 4 needs to maintain the zinc liquid 2 at a suitable depth and position in the furnace nose 4 so that it can fully contact with the zinc liquid 2 to complete the galvanizing reaction, while preventing the zinc liquid 2 from excessively sinking or floating, which affects the effect and efficiency of galvanizing;

[0027] The furnace nose 4 is connected to other parts of the galvanizing equipment and needs to form a relatively sealed environment to reduce the entry of outside air into the galvanizing area. The entry of outside air may cause oxidation of the zinc liquid, produce impurities such as zinc slag and zinc ash, and affect the quality of galvanizing. Through a good sealing design, the furnace nose 4 can effectively prevent the entry of air and maintain a stable chemical environment in the galvanizing area.

[0028] See also Figure 1-Figure 2 A collecting plate 9 is also provided in the furnace nose 4, the upper end of the collecting plate 9 is higher than the liquid level of the zinc liquid 2, and a collecting trough 8 with an upper end opening is formed between the collecting plate 9 and the lower end of the inner side of the furnace nose 4.

[0029] Specifically, the zinc ash on the side of the steel strip 5 away from the overflow trough 6 can be collected by the cooperation of the collecting trough 8 and the collecting vertical plate 9 .

[0030] See also Figure 1-Figure 3 The overflow vertical plate 7 includes a connecting arm 74 which is detachably fixed to the outer wall of the furnace nose 4. One end of the connecting arm 74 extending to the inside of the furnace nose 4 is fixedly connected to a support plate 72, and an end plate 71 is embedded and installed outside the support plate 72.

[0031] Specifically, by cooperating with the inner wall of the furnace nose 4, the overflow groove 6 can be formed inside the furnace nose 4, and when the overflow upright plate 7 is damaged, the end plate 71 can be replaced separately, and the height and horizontality of the movable end plate 71 can be flexibly adjusted through the connecting arm 74, which greatly improves the slag discharge effect and efficiency of the furnace nose 4, extends the replacement cycle of the furnace nose 4, reduces the spare parts cost and labor cost of the furnace nose 4, and improves the efficiency of the production enterprise.

[0032] See also Figure 3 The support plate 72 is threadedly connected to the fixing bolt 73 , and the end plate 71 is provided with a threaded blind hole for the fixing bolt 73 to be screwed into. The end plate 71 is fixed to the support plate 72 by the fixing bolt 73 .

[0033] Specifically, since the end plate 71 is always in contact with the liquid surface of the zinc liquid 2 and the top of the end plate 71 is relatively weak, the temperature of the zinc liquid 2 and the impact under the suction action will cause damage to the end plate 71. Therefore, the fixing bolts 73 are used to connect the end plate 71 to the support plate 72 to facilitate the replacement of the end plate 71.

[0034] See also Figure 3 A straight slot 75 is provided on the side wall of the connecting arm 74 along its length direction, and a straight screw 76 is inserted into the inside of the straight slot 75. One end of the straight screw 76 is fixed to the outer wall of the furnace nose 4. A nut 77 is threadedly connected to the straight screw 76. The connecting arm 74 is fixed to the side wall of the furnace nose 4 through the cooperation of the straight screw 76 and the nut 77.

[0035] Specifically, the connecting arm 74 can be fixed on the outer wall of the furnace nose 4 by cooperating with the set nut 77 and the straight screw 76, and it is also convenient to disassemble the connecting arm 74. Since the connecting arm 74 is provided with a straight slot 75, the straight slot 75 can slide along the straight screw 76, and then the position of the end plate 71 can be adjusted by adjusting the position of the straight screw 76 and the straight slot 75, and then the position can be adjusted according to the liquid level of the zinc liquid 2 inside the zinc pot 1. The height of the end plate 71 is 2mm to 5mm lower than the liquid level of the zinc liquid 2 in the furnace nose 4, so that the zinc liquid 2 can overflow into the overflow trough 6 through the end plate 71, and then be discharged from the overflow trough 6 to the furnace nose 4 through the suction of the ash suction pump 11.

[0036] Working principle: After the steel strip 5 passes through the furnace nose 4 and is galvanized in the zinc pot 1, it is conveyed to the downstream through the conveyor roller 3. During the galvanizing process, the zinc smoke generated by the high-temperature zinc liquid 2 will fill the space inside the furnace nose 4. By introducing inert gas into the furnace nose 4 and extracting the gas with an exhaust fan, the zinc smoke is extracted under the action of the inert gas without reacting with trace oxygen and other elements; after the steel strip 5 contacts with the zinc liquid 2, a certain amount of zinc slag will be generated above the liquid level of the zinc liquid 2 inside the furnace nose 4, and the zinc slag will be driven by the zinc liquid 2 to overflow into the overflow trough 6, and then be extracted and recycled by the ash suction pump 11 through the ash suction pipe 10, and then the zinc ash and impurities in the overflow trough 6 will be discharged to the outside of the furnace nose 4 by the discharge pipe 12, so that the zinc liquid 2 in the furnace nose 4 can be continuously replaced to improve the purity of the zinc liquid 2.

Claims

1. A zinc boiler nose zinc liquid level control structure, comprising a zinc pot (1), wherein zinc liquid (2) is arranged inside the zinc pot (1), characterized in that: A furnace nose (4) is arranged inside the zinc pot (1); an overflow vertical plate (7) is detachably installed inside the lower end of the furnace nose (4); the upper end of the overflow vertical plate (7) is flush with the liquid surface of the zinc liquid (2); an overflow trough (6) with an upper end open is formed between the overflow vertical plate (7) and the lower end of the inner wall of the furnace nose (4); an ash suction pump (11) is arranged outside the furnace nose (4); the ash suction pump (11) is used to extract the zinc liquid (2) overflowing into the overflow trough (6).

2. A zinc boiler nose zinc liquid level control structure as claimed in claim 1, characterized in that: The ash suction pump (11) is connected to an ash suction pipe (10) and a discharge pipe (12); one end of the ash suction pipe (10) away from the ash suction pump (11) is connected to the bottom of the overflow tank (6); and one end of the discharge pipe (12) away from the ash suction pump (11) is connected to the zinc liquid (2) outside the furnace nose (4).

3. A zinc boiler nose zinc liquid level control structure as claimed in claim 1, characterized in that: A conveying roller (3) is also provided inside the zinc pot (1), and a steel belt (5) is transmitted on the conveying roller (3), and the steel belt (5) is passed through the inside of the furnace nose (4).

4. A zinc boiler nose zinc liquid level control structure as claimed in claim 3, characterized in that: The furnace nose (4) is arranged obliquely along the traveling direction of the steel strip (5); the furnace nose (4) is a flat cylindrical structure that penetrates from top to bottom; and the lower end of the furnace nose (4) is immersed in the zinc liquid (2).

5. A zinc boiler nose zinc liquid level control structure as claimed in claim 4, characterized in that: A collecting plate (9) is also provided in the furnace nose (4), the upper end of the collecting plate (9) being higher than the liquid level of the zinc liquid (2), and a collecting trough (8) with an open upper end is formed between the collecting plate (9) and the lower end of the inner side of the furnace nose (4).

6. A zinc boiler nose zinc liquid level control structure as claimed in claim 1, characterized in that: The overflow vertical plate (7) comprises a connecting arm (74) which is detachably fixed to the outer wall of the furnace nose (4); one end of the connecting arm (74) extending to the interior of the furnace nose (4) is fixedly connected to a support plate (72); an end plate (71) is embedded and mounted on the exterior of the support plate (72).

7. A zinc boiler nose zinc liquid level control structure as claimed in claim 6, characterized in that: The support plate (72) is threadedly connected to a fixing bolt (73); a threaded blind hole for the fixing bolt (73) to be screwed into is provided on the end plate (71); and the end plate (71) is fixed to the support plate (72) by the fixing bolt (73).

8. A zinc boiler nose zinc liquid level control structure as claimed in claim 6, characterized in that: A straight slot (75) is provided on the side wall of the connecting arm (74) along its length direction, a straight screw (76) is inserted into the interior of the straight slot (75), one end of the straight screw (76) is fixed to the outer wall of the furnace nose (4), a nut (77) is threadedly connected to the straight screw (76), and the connecting arm (74) is fixed to the side wall of the furnace nose (4) by the cooperation of the straight screw (76) and the nut (77).

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