Hot-rolled ribbed steel bar galvanizing device

Abstract

The utility model provides a hot-rolled ribbed steel bar galvanizing device which comprises a galvanizing sealing cover, a galvanizing mechanism and an air knife mechanism, wherein the galvanizing mechanism and the air knife mechanism are arranged in the galvanizing sealing cover; the galvanizing mechanism comprises a galvanizing tank, a zinc pot and a zinc liquid lifting assembly, molten zinc liquid is contained in the zinc pot, the galvanizing tank is horizontally arranged above the zinc pot in the length direction, and the zinc liquid lifting assembly capable of lifting the zinc liquid in the zinc pot to a high position and pouring the zinc liquid into the galvanizing tank is arranged on one side of the galvanizing tank; the air knife mechanism comprises a first air knife, a second air knife and a third air knife which are sequentially arranged at the downstream of the galvanizing tank; the first air knife, the second air knife and the third air knife are all of a hollow structure shaped like a Chinese character'hui '. Nozzles communicated with air cavities in the first air knife, the second air knife and the third air knife are further arranged on the first air knife, the second air knife and the third air knife. Galvanizing and plating thickness control are carried out in a nitrogen atmosphere environment, oxygen harm is avoided, and meanwhile, online galvanization is adopted, so that the galvanization requirement of ribbed steel bars of any length can be met.

Description

Technical Field

[0001] The utility model relates to the technical field of ribbed steel bars, in particular to a galvanizing device for hot-rolled ribbed steel bars. Background Art

[0002] Hot-rolled ribbed steel bars, commonly known as threaded steel bars, have high strength, high toughness, and good seismic resistance. They are ideal products for high-rise buildings and are widely used in the field of building concrete. In order to increase the corrosion resistance of steel bars and improve the strength and life of reinforced concrete, hot-dip galvanizing is usually performed on the outside of hot-rolled ribbed steel bars. After hot-dip galvanizing, the surface of the steel bar is covered with a pure zinc layer in the form of complete physical protection. A Zn-Fe alloy layer is also formed between the pure zinc layer and the steel bar matrix, which isolates the steel bar matrix from the atmosphere, thereby protecting the steel bar matrix from corrosion.

[0003] The existing technology is that the downstream galvanizing plant uses ribbed steel bars of a certain length (several meters in length) produced by the upstream hot rolling plant as raw materials. The ribbed steel bars at room temperature are ground to remove iron oxide scale, degreased, and heated, and then hoisted into bundles into a zinc pot for hot-dip galvanizing and post-galvanizing treatment. This is a discontinuous small-batch short-size production and is not suitable for galvanizing long steel bars of more than ten meters. At the same time, the labor intensity of workers is high, the working environment is poor, the production efficiency is low, the output is low, and the unit energy consumption is high.

[0004] Since the ribbed steel bars are in a high-temperature state during galvanizing, once the iron oxide scale is removed and the steel substrate is exposed, the steel substrate during transportation can easily undergo an oxidation reaction with the air, thereby affecting the subsequent galvanizing effect; moreover, during the galvanizing process, the high-temperature steel bars will inevitably undergo an oxidation reaction to generate iron oxide scale, thereby affecting the bonding strength between the coating and the substrate.

[0005] Therefore, how to avoid the influence of oxygen on the galvanized ribbed steel bars, improve the bonding strength between the coating and the substrate, and solve the problem that the existing galvanizing technology cannot meet the needs of galvanizing steel bars longer than ten meters has become a key factor restricting the mass production of galvanized ribbed steel bars. Utility Model Content

[0006] The utility model overcomes the disadvantages of the prior art and provides a hot-rolled ribbed steel bar galvanizing device, solves the influence of oxygen on the steel bar matrix, realizes online galvanizing, and can meet the galvanizing requirements of ribbed steel bars of any length.

[0007] The technical solution adopted by the utility model to solve its technical problems is:

[0008] A hot-rolled ribbed steel bar galvanizing device comprises a galvanizing sealing cover, and a galvanizing mechanism and an air knife mechanism arranged in the galvanizing sealing cover; an inlet and an outlet for the ribbed steel bar to pass through are respectively arranged at both ends of the galvanizing sealing cover;

[0009] The galvanizing mechanism includes a galvanizing tank, a zinc pot and a zinc liquid lifting component. The zinc pot contains molten zinc liquid. The galvanizing tank is horizontally arranged above the zinc pot along the length direction. A zinc liquid lifting component that can lift the zinc liquid in the zinc pot to a high place and pour it into the galvanizing tank is arranged on one side of the galvanizing tank; the air knife mechanism includes a first air knife, a second air knife and a third air knife that are sequentially arranged downstream of the galvanizing tank; the first air knife, the second air knife and the third air knife are all "U"-shaped hollow structures, and the first air knife, the second air knife and the third air knife are also provided with nozzles connected to their internal air cavities.

[0010] A further improvement of the utility model is that a nitrogen input pipe is arranged on the top of the inlet side of the galvanized sealing cover, and a discharge tower is arranged on the top of the outlet side of the galvanized sealing cover.

[0011] The further improvement of the utility model lies in that: the zinc liquid lifting assembly includes a lifting wheel, a zinc bucket, a flip support block, and a lifting motor for driving the lifting wheel to rotate; the lifting wheel is a circular wheel with a rotatable support, and a plurality of zinc buckets are connected to the lifting wheel along the circumference of the axis. The zinc buckets can be immersed in the zinc pot as the lifting wheel rotates, and the zinc liquid can be lifted to a high place for transfer; the lifting wheel is also provided with a flip support block for gradually tilting the zinc bucket lifted out of the zinc pot toward the side of the galvanizing tank.

[0012] A further improvement of the utility model is that a slag removal component for removing zinc slag in the zinc liquid is also arranged on the opposite side of the zinc liquid lifting component.

[0013] A further improvement of the utility model is that the blowing direction of the first air knife is inclined toward the running direction of the ribbed steel bars, the blowing direction of the second air knife is perpendicular to the running direction of the ribbed steel bars, and the blowing direction of the third air knife is inclined in the opposite direction to the running direction of the ribbed steel bars.

[0014] A further improvement of the utility model is that the angle α between the blowing direction of the first air knife and the running direction of the ribbed steel bar, and the angle β between the blowing direction of the third air knife and the running direction of the ribbed steel bar are respectively consistent with the inclination angles on both sides of the transverse ribs of the ribbed steel bar.

[0015] The beneficial effects of the utility model are:

[0016] The utility model provides a hot-rolled ribbed steel bar galvanizing device, which uses a rotating lifting wheel to continuously lift the zinc liquid to a high place in an oxygen-free environment, and continuously transfers it to the galvanizing tank, so that the zinc liquid accumulates in the galvanizing tank. When the high-temperature hot-rolled ribbed steel bar passes through the galvanizing tank filled with zinc liquid, the surface of the steel bar can be coated without leaving a galvanizing dead corner. The galvanizing process is continuous, and multiple ribbed steel bars can be galvanized at the same time; moreover, according to the actual requirements of the thickness of the zinc layer on the surface of the steel bar, one or more zinc liquid lifting mechanisms can be selected for operation, and a multi-layer coating method can be used to achieve the purpose of a thicker coating. Compared with direct coating of a thicker coating, the coating after multiple layers of coating has better density and bonding strength with the substrate.

[0017] After the galvanizing is completed, three air knives are set up continuously and at different spray angles to blow off the excess zinc liquid attached to the surface of the steel bar. The change in the spray angle conforms to the protruding angle of the transverse ribs on the surface of the ribbed steel bar, ensuring that the coating thickness of each part of the surface of the ribbed steel bar is consistent, especially for the part where the zinc liquid is easily accumulated at the intersection of the transverse ribs and the steel bar body. The effect is very significant. The consistent coating thickness of the ribbed steel bar surface ensures that the control parameters such as the height of the transverse ribs meet the relevant requirements, and further guarantees the performance parameters such as the strength of the ribbed steel bar.

[0018] The utility model also has two types of heating components in the galvanizing mechanism, one of which is the auxiliary heater on the zinc pot, which can effectively ensure the temperature and fluidity of the zinc liquid in the zinc pot, and the other is the electric heating component arranged on the top of the galvanizing sealing tank, which can radiate and heat the zinc liquid flowing into the slag discharge mechanism, prevent the heat loss of the zinc liquid, reduce the zinc slag ratio, and maintain the good fluidity of the zinc liquid in the galvanizing tank. Generally speaking, the auxiliary heater and the electric heating component are arranged in multiple groups, the auxiliary heater is evenly distributed along the length direction of the zinc pot, the electric heating plate is arranged along the length direction of the galvanizing tank, and the motor heating component is usually arranged above the zinc liquid lifting mechanism to ensure that the zinc liquid is evenly heated and has good fluidity. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a side view structural diagram of the galvanizing mechanism;

[0021] Figure 3 It is a structural schematic diagram of the slag discharge component;

[0022] Figure 4 It is the overall structural diagram of the air knife mechanism;

[0023] Figure 5 Schematic diagram of the side structure of the air knife;

[0024] Figure 6 is a schematic diagram of the spray angle α of the first air knife nozzle;

[0025] Figure 7 is a schematic diagram of the spray angle β of the third air knife nozzle;

[0026] In the figure: 1, ribbed steel bar, 2, galvanized sealing cover, 2-1, discharge tower, 2-2, electric heating component, 3, nitrogen inlet pipe, 6, galvanizing tank, 7, zinc pot, 7-1, auxiliary heater, 7-2, liquid level window, 8-1, hoist wheel, 8-2, zinc bucket, 8-3, flip support block, 8-5, suspension beam, 8-6, cantilever, 9, slag discharge component, 9-1, separation chamber, 9-2, steady flow chamber, 9-3, slag baffle , 9-4, zinc slag discharge port, 9-5, zinc slag discharge trough, 10, zinc liquid, 11, bell mouth, 12, zinc slag, 13-1, the first air knife, 13-2, the second air knife, 13-3, the third air knife, 13-4, the first guide groove, 13-5, the second guide groove, 13-6, the third guide groove, 13-7, zinc liquid recovery trough, 13-8, heating plate, 14, air cavity, 15, nozzle, 16, compressed nitrogen pipe. DETAILED DESCRIPTION

[0027] The utility model will be further described below in conjunction with the accompanying drawings.

[0028] A hot-rolled ribbed steel bar galvanizing device, such as Figure 1 to Figure 7 As shown, it includes a galvanized sealing cover 2, and a galvanizing mechanism and an air knife mechanism arranged in the galvanized sealing cover 2.

[0029] The galvanized sealed cover 2 is filled with nitrogen, and the galvanized sealed cover 2 is positively pressurized, so that the galvanizing process is carried out in an oxygen-free environment. The two ends of the galvanized sealed cover 2 are respectively provided with an inlet and an outlet for the hot-rolled ribbed steel bar 1 to pass through. A nitrogen input pipe 3 is provided on the top of the inlet side of the galvanized sealed cover 2, and a discharge tower 2-1 is provided on the top of the outlet side. Nitrogen enters the galvanized sealed cover 2 through the nitrogen input pipe 3 and is discharged from the discharge tower 2-1, ensuring that the interior of the galvanized sealed cover 2 is filled with nitrogen and presents an oxygen-free micro-positive pressure environment.

[0030] Specifically, before galvanizing, the air in the galvanizing sealing cover 2 needs to be replaced. Through one or more replacements, it is ensured that the air in the galvanizing sealing cover 2 has been completely replaced by nitrogen before the galvanizing operation is carried out.

[0031] The galvanizing mechanism, such as Figures 1 to 3 As shown, it includes a galvanizing tank 6, a zinc pot 7 and a zinc liquid lifting assembly. The galvanizing mechanism is arranged in a galvanizing sealing cover 2 filled with nitrogen and under positive pressure, and the galvanizing process is carried out in an oxygen-free environment.

[0032] Usually, before galvanizing, the air in the galvanizing sealing cover 2 needs to be replaced. Through one or more replacements, it is ensured that the air in the galvanizing sealing cover 2 has been completely replaced by nitrogen before normal galvanizing operation can be carried out.

[0033] An electric heating component 2-2 is installed on the top of the galvanizing sealing groove 2, which can provide auxiliary heat during the galvanizing process to prevent the heat loss of the zinc liquid 10 and avoid the generation of zinc slag. The temperature of the zinc liquid 10 can be maintained between 450°C and 480°C, and it has good fluidity, and can be fully coated and film-formed on the surface of the hot-rolled ribbed steel bar 1.

[0034] The zinc pot 7 contains zinc liquid 10, and an auxiliary heater 7-1 is also provided on the zinc pot 7 to ensure the liquid state and good fluidity of the zinc liquid 10; the number of the auxiliary heaters 7-1 is determined according to the length of the zinc pot 7, and the auxiliary heaters 7-1 are usually arranged along the length direction of the zinc pot 7. The zinc pot 7 is also provided with a liquid level window 7-2 for checking the flow status of the zinc liquid 10 in the pot and the liquid level of the zinc liquid 10 at any time, so as to replenish the zinc liquid 10 in time.

[0035] A galvanizing tank 6 is arranged parallel to the upper extension direction of the zinc pot 7, and the galvanizing tank 6 is a long tank with a horizontal channel inside; a zinc liquid lifting component is arranged on one side of the galvanizing tank 6, which can lift the zinc liquid 10 in the zinc pot 7 and pour it into the galvanizing tank 6, and a slag removal component is arranged on the opposite side of the zinc liquid lifting component for removing zinc slag in the zinc liquid 10. A plurality of hot-rolled ribbed steel bars 1 enter the galvanizing tank 6 side by side, and as the hot-rolled ribbed steel bars 1 are transported forward, they contact the zinc liquid 10 in the galvanizing tank 6 and complete surface coating.

[0036] The length of the galvanizing tank 6 is smaller than that of the zinc pot 7 , so that the zinc liquid 10 flows out from the openings at both ends of the galvanizing tank 6 and directly falls into the zinc pot 7 .

[0037] The zinc liquid lifting assembly includes a lifting wheel 8-1, a zinc bucket 8-2, a tilting support block 8-3, and a lifting motor for driving the lifting wheel 8-1 to rotate. The lifting wheel 8-1 is a circular wheel with a rotary support, the power output shaft of the lifting motor is connected to the reducer, the power output shaft of the reducer is connected to the wheel core of the lifting wheel 8-1, and the lifting wheel 8-1 is driven by the power of the lifting motor to rotate; a supporting shaft balancer is also provided between the lifting motor and the wheel core of the lifting wheel 8-1 to ensure the constant and stable rotation of the lifting wheel 8-1.

[0038] It should be noted that, due to the high temperature of the zinc pot, in order to ensure the stable rotation of the hoisting wheel, the hoisting motor, reducer, and support shaft balancer are all arranged outside the galvanized sealing cover 2, and a cooling protection cover is arranged around it to prevent the hoisting motor from overheating.

[0039] A plurality of zinc buckets 8-2 are connected to the lifting wheel 8-1, and the zinc buckets 8-2 are evenly distributed along the axis of the lifting wheel 8-1. When the zinc buckets 8-2 rotate to fill the zinc pot 7 with zinc liquid 10, the zinc pot 7 is lifted to a high place. The lifting wheel 8-1 is also provided with a turning support block 8-3 for gradually tilting the zinc bucket 8-2 that has been transferred out of the zinc pot 7 toward the galvanizing tank 6.

[0040] like Figure 2 As shown, the hoist wheel 8-1 is evenly distributed with a number of suspension beams 8-5, which are perpendicular to the wheel body of the hoist wheel 8-1 and extend to one side of the galvanizing tank 6. The zinc bucket 8-2 is hinged to the suspension beam 8-5 through two cantilevers 8-6, and the zinc bucket 8-2 and the cantilevers 8-6 on both sides are also hinged through hinge shafts; when the hoist wheel 8-1 rotates, the zinc bucket 8-2 rotates with the suspension beam 8-5 as the axis, so that the opening of the zinc bucket 8-2 is always facing upward.

[0041] A flip support block 8-3 is also provided on one side of the lifting wheel 8-1, which is used to gradually tilt the zinc bucket 8-2 during the upward lifting process until it tilts horizontally. The flip support block 8-3 is fixedly arranged on the lifting wheel 8-1 and does not rotate with the rotation of the lifting wheel 8-1. The flip support block 8-3 is usually arranged in the area between the zinc bucket 8-2 leaving the zinc pot 7 and the zinc bucket 8-2 being lifted to the highest point. Figure 2 As shown, the flip support block 8-3 is a fan-shaped wedge block with a central angle of 90° and an inclined top surface. The inclination angle of the top inclined surface of the flip support block 8-3 gradually decreases from bottom to top, and the zinc bucket 8-2 contacts the top inclined surface of the flip support block 8-3; the bottom of the zinc bucket 8-2 is arc-shaped. When the zinc bucket 8-2 is lifted upward from the galvanizing tank 6, the bottom of the zinc bucket 8-2 contacts the flip support block 8-3 and is tilted along the hinge axis of the cantilever 8-6 by the upward thrust of the flip support block 8-3. With the rotation of the hoist wheel 8-1, the inclination angle of the zinc bucket 8-2 gradually increases until it reaches the top of the hoist wheel 8-1. The zinc bucket 8-2 is horizontal and pours the zinc liquid 10 into the galvanizing tank 6. Subsequently, the zinc bucket 8-2 continues to descend under the action of the hoist wheel 8-1, and the support effect with the flip support block 8-3 is released. The zinc bucket 8-2 is reset under the action of gravity, and the lifting and transfer of the zinc liquid 10 are repeated.

[0042] The other side of the galvanizing tank 6 is provided with a slag discharge assembly 9 corresponding to the top of the lifting wheel 8-1. Figure 3As shown, the slag discharge mechanism 9 includes a separation chamber 9-1 and a steady flow chamber 9-2 which are arranged side by side and connected at the bottom. The height of the connection point is adjusted by a slag baffle plate 9-3 between the separation chamber 9-1 and the steady flow chamber 9-2. The top of the separation chamber 9-1 is open and corresponds to the zinc bucket 8-2 pouring point of the lifting wheel 8-1. The top of the separation chamber 9-1 is provided with a zinc slag discharge port 9-4 which is connected to the zinc slag discharge slot 9-3. The bottom of the steady flow chamber 9-2 is connected to the galvanizing tank 6. The zinc liquid in the zinc bucket 8-2 flows in from the top opening of the separation chamber 9-1. Under the action of gravity, the zinc slag 12 floats on the surface of the zinc liquid 10 and enters the zinc slag discharge slot 9-5 through the zinc slag discharge port 9-4. After being collected and purified, it is reused as the galvanizing liquid; the zinc liquid 10 enters the steady flow chamber 9-2 through the connection point and flows into the galvanizing tank 6 from the discharge port at the bottom of the steady flow chamber 9-2, and the multiple hot-rolled ribbed steel bars 1 passing therethrough are coated. During the flow of zinc liquid, based on the principle of communicating vessels, the liquid level in the flow stabilization chamber 9-2 can be maintained at a certain height, and a stable flow of zinc liquid can be maintained during the pouring intervals of the zinc bucket 8-2, thereby ensuring the height of zinc liquid in the galvanizing tank 6 and the galvanizing effect of the ribbed steel bars.

[0043] A vertical slot is provided between the separation chamber 9-1 and the steady flow chamber 9-2, and the slag baffle plate 9-3 is inserted into the slot, so that a flow channel of the zinc liquid is formed between the slag baffle plate 9-3 and the bottom of the separation chamber 9-1. The slag baffle plate 9-3 can be fixed to the top of the steady flow chamber 9-2 by pins. At this time, the slag baffle plate 9-3 is a fixed slag baffle plate, and the flow speed of the zinc liquid cannot be adjusted; the slag baffle plate 9-3 can also be adjusted in position by a pneumatic adjustment cylinder. Specifically, a pneumatic adjustment cylinder is installed on the top of the galvanized sealing cover 2, and the front end of the pneumatic adjustment cylinder's pneumatic rod is connected to the top of the slag baffle plate. The height of the slag baffle plate 9-3 is controlled by the extension and contraction of the pneumatic rod, thereby adjusting the height of the flow channel between the slag baffle plate 9-3 and the bottom of the separation chamber 9-1.

[0044] During use, multiple sets of zinc liquid lifting components and slag removal components can be sequentially arranged according to the required zinc coating thickness on the surface of the ribbed steel bar 1, such as the two sets shown in the figure. The purpose of thicker coating is achieved by multi-layer coating. Compared with direct coating of thicker coating, the coating after multi-layer coating has better density and bonding strength with the substrate.

[0045] The galvanized sealing cover 2 is also provided with an air knife mechanism for controlling the thickness of the zinc layer of the galvanized ribbed steel bar 1. Figure 1 , Figure 4As shown, the air knife mechanism includes a first air knife 13-1, a second air knife 13-2 and a third air knife 13-3 which are sequentially arranged downstream of the galvanizing tank 6. The first air knife 13-1, the second air knife 13-2 and the third air knife 13-3 are all "U"-shaped hollow structures, and the first air knife 13-1, the second air knife 13-2 and the third air knife 13-3 are provided with corresponding conveying channels for the hot-rolled ribbed steel bars 1 to pass through, and an air cavity 14 is formed between the conveying channel and the outer wall of the air knife. The top and bottom of the air cavity 14 are respectively connected to a compressed nitrogen pipe 16.

[0046] A plurality of nozzles 15 are arranged around the conveying channel, the nozzles 15 are connected to the air cavity 14, and the nozzles 15 are all oriented toward the center of the conveying channel. Compressed nitrogen is simultaneously ejected from the plurality of nozzles 15 through the air cavity 14 to perform all-round blowing on the surface of the galvanized hot-rolled ribbed steel bar 1 being conveyed to remove excess zinc liquid.

[0047] like Figure 6 , Figure 7 As shown, the blowing direction of the nozzle 15 of the first air knife 13-1 is inclined toward the running direction of the ribbed steel bar 1, and the angle α between the blowing direction of the nozzle 15 of the first air knife 13-1 and the running direction of the ribbed steel bar 1 is 130°~150°; the blowing direction of the nozzle 15 of the second air knife 13-2 is perpendicular to the running direction of the ribbed steel bar 1; the blowing direction of the nozzle 15 of the third air knife 13-3 is inclined in the opposite direction of the running direction of the ribbed steel bar 1, and the angle β between the blowing direction of the nozzle 15 of the third air knife 13-3 and the running direction of the ribbed steel bar 1 is 40°~50°. By blowing at three different angles of air knives, the excess zinc liquid attached to the surface of the transverse ribs of the ribbed steel bar 1 is blown away. The angle between the nozzle blowing direction of the first air knife 13-1 / the nozzle blowing direction of the third air knife 13-3 and the running direction of the ribbed steel bar 1 can be adjusted and changed according to the size of the transverse ribs of the ribbed steel bar 1, so that it is consistent with the inclination angle of the transverse rib surface.

[0048] In order to ensure the stable forward transportation of the galvanized hot-rolled ribbed steel bar 1, a first guide groove 13-4 is provided between the first air knife 13-1 and the second air knife 13-2, a second guide groove 13-5 is provided between the second air knife 13-2 and the third air knife 13-3, and a third guide groove 13-6 is provided at the rear end of the third air knife 13-3.

[0049] Preferably, since the ribbed steel bars 1 after the hot rolling are cut into multiple pieces arranged side by side and conveyed forward synchronously, in order to ensure the effect of blowing away the zinc liquid, the number of nozzles 15 located above and below is not less than the number of ribbed steel bars 1, and they are evenly distributed along the width direction to ensure that the surfaces of the multiple ribbed steel bars 1 are all blown synchronously. The number of nozzles 15 located on both sides of the ribbed steel bars 1 is preferably two.

[0050] A zinc liquid recovery tank 13-7 is also provided below the first air knife 13-1, the second air knife 13-2 and the third air knife 13-3, and the zinc liquid recovery tank 13-7 is directly connected to the zinc pot 7. The zinc liquid blown off by the air knife falls into the zinc liquid recovery tank 13-7, and returns to the zinc pot 7 for reuse after being enriched.

[0051] In order to prevent the dripping zinc liquid from solidifying in the zinc liquid recovery tank 13-7 and being unable to be recovered, a heating plate 13-8 is arranged at the bottom of the zinc liquid recovery tank 13-7. While keeping the zinc liquid in liquid state, the zinc liquid recovery tank 13-7 will also affect the temperature of the galvanized ribbed steel bar 1 passing thereover, so that the galvanized ribbed steel bar 1 is kept at a constant temperature, and the coating is prevented from cooling and solidifying in advance, which affects the subsequent air knife purge control of the coating.

[0052] In order to facilitate the reflux of the zinc liquid in the zinc liquid recovery tank 13 - 7 , the bottom of the zinc liquid recovery tank 13 - 7 is arranged to be inclined toward the zinc pot 7 .

[0053] Since the ribbed steel bars 1 after the hot rolling are cut into multiple pieces and arranged side by side, they are transported forward synchronously. In order to restrain and smooth the ribbed steel bars 1 laterally, so that they can be transported smoothly and continuously to avoid steel piling, the inlet ends of the galvanizing groove 6, the first guide groove 13-4, the second guide groove 13-5, and the third guide groove 13-6 are all connected to the trumpet mouth 11 with a large front and a small back, which is used to restrain and feed the multiple ribbed steel bars 1 into the box laterally and transport them continuously to avoid steel piling.

[0054] The working process of the utility model is:

[0055] The zinc bucket rotates continuously with the hoist wheel. The zinc bucket is immersed in the zinc pot to hold the zinc liquid. During the upward lifting process, it is gradually turned over by the overturning support block. When it reaches the top of the hoist wheel, the zinc bucket tilts to a horizontal level. The zinc liquid in the zinc bucket flows into the slag discharge mechanism. The zinc liquid after separating the zinc slag flows into the galvanizing tank to coat the hot-rolled ribbed steel bars passing through it. The excess zinc liquid flows into the zinc pot from both ends of the galvanizing tank.

[0056] After galvanizing, the ribbed steel bar enters the air knife mechanism, and the first air knife, the second air knife, and the third air knife spray in three directions to blow away the excess zinc liquid, so that the zinc layer thickness on the surface of the ribbed steel bar is uniform. After cooling, the zinc layer solidifies, and the galvanized ribbed steel bar is obtained. The excess zinc liquid blown away by the air knife flows back to the zinc pot through the zinc liquid recovery tank.

[0057] The embodiments described above are merely descriptions of preferred implementation modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A hot-rolled ribbed steel bar galvanizing device, characterized in that: It comprises a galvanized sealing cover (2), and a galvanizing mechanism and an air knife mechanism arranged in the galvanized sealing cover (2); an inlet and an outlet for the ribbed steel bars (1) to pass through are respectively arranged at two ends of the galvanized sealing cover (2); The galvanizing mechanism comprises a galvanizing tank (6), a zinc pot (7) and a zinc liquid lifting component. The zinc pot (7) contains molten zinc liquid. The galvanizing tank (6) is horizontally arranged above the zinc pot (7) along the length direction. A zinc liquid lifting component is arranged on one side of the galvanizing tank (6) and can lift the zinc liquid (10) in the zinc pot (7) to a high place and pour it into the galvanizing tank (6). The air knife mechanism comprises a first air knife (13-1), a second air knife (13-2) and a third air knife (13-3) which are sequentially arranged downstream of a galvanizing tank (6); the first air knife (13-1), the second air knife (13-2) and the third air knife (13-3) are all "U"-shaped hollow structures, and the first air knife (13-1), the second air knife (13-2) and the third air knife (13-3) are also provided with a nozzle (15) which is connected to the air cavity (14) inside the first air knife (13-1), the second air knife (13-2) and the third air knife (13-3).

2. The hot-rolled ribbed steel bar galvanizing device according to claim 1, characterized in that: A nitrogen input pipe (3) is arranged at the top of the inlet side of the galvanized sealing cover (2), and a discharge tower (2-1) is arranged at the top of the outlet side of the galvanized sealing cover (2).

3. The hot-rolled ribbed steel bar galvanizing device according to claim 1, characterized in that: The zinc liquid lifting assembly comprises a lifting wheel (8-1), a zinc bucket (8-2), a turning support block (8-3), and a lifting motor for driving the lifting wheel (8-1) to rotate; the lifting wheel (8-1) is a circular wheel supported in a rotatable manner, and a plurality of zinc buckets (8-2) are connected to the lifting wheel (8-1) along the circumferential direction of the axis, and the zinc buckets (8-2) can be immersed in the zinc pot (7) as the lifting wheel (8-1) rotates, and the zinc liquid (10) is lifted to a high place for transfer; the lifting wheel (8-1) is also provided with a turning support block (8-3) for gradually tilting the zinc bucket (8-2) lifted out of the zinc pot (7) toward the side of the galvanizing tank (6).

4. The hot-rolled ribbed steel bar galvanizing device according to claim 3, characterized in that: A slag removal assembly (9) for removing zinc slag (12) in the zinc liquid (10) is also arranged on the opposite side of the zinc liquid lifting assembly.

5. The hot-rolled ribbed steel bar galvanizing device according to claim 1, characterized in that: The blowing direction of the first air knife (13-1) is inclined toward the running direction of the ribbed steel bar (1), the blowing direction of the second air knife (13-2) is perpendicular to the running direction of the ribbed steel bar (1), and the blowing direction of the third air knife (13-3) is inclined in the opposite direction to the running direction of the ribbed steel bar (1).

6. The hot-rolled ribbed steel bar galvanizing device according to claim 5, characterized in that: The angle α between the blowing direction of the first air knife (13-1) and the running direction of the ribbed steel bar 1, and the angle β between the blowing direction of the third air knife (13-3) and the running direction of the ribbed steel bar 1 are respectively consistent with the inclination angles on both sides of the ribbed steel bar transverse ribs (5).

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