CN200952031Y

CN200952031Y - Airblade antinoclulating device

Info

Publication number: CN200952031Y
Application number: CN 200620034970
Authority: CN
Inventors: 余文富
Original assignee: Panzhihua New Steel and Vanadium Co Ltd
Current assignee: Pangang Group Steel Vanadium and Titanium Co Ltd
Priority date: 2006-07-19
Filing date: 2006-07-19
Publication date: 2007-09-26
Anticipated expiration: 2016-07-19

Abstract

The utility model discloses a device for preventing sticky lump of air knife, which comprises two sets of injection devices (20) arranged respectively at two outside lateral sides of a strip steel (10) to provide air flows at two outside lateral sides of the strip steel (10) in opposite direction to the motion direction of the strip steel (10). The injection device (20) comprises a nozzle (21) fixed on an edge baffle (14) at the outside edge of the strip steel (10), and a pipeline (22) connected between the nozzle (21) and a compressed air source. The utility model has the advantages that the device can efficiently eliminate the sticky lump of air knife, ensure the normal work of air knife, and help to improve the quality of hot dip galvanized strip steel; and the utility model has simple structure and easy operation.

Description

Air knife is prevented the dross device

Technical field

The utility model relates to the air knife that is used to control galvanized layer thickness in the hot-dip galvanized steel strip production line, particularly a kind of device that prevents the air knife dross.

Background technology

At present, all be the thickness that adopts air knife control strip steel Zn-plating layer on the hot-dip galvanized steel strip production line.Promptly outside the forward and backward surface of band steel, one group of corresponding air knife is set respectively, in air knife, carry pressurized air in the production process, the slit after-blow removes the unnecessary zinc liquid of being with institute's adhesive tape on the forward and backward surface of steel to pressurized air through nozzle cutter lip, and galvanized layer thickness is controlled.In process of production,, therefore in cutter lip slit, produce dross easily, influence the air knife works better because the air-flow that two air knives are produced is being with the steel both sides to get muddled, and can not get better counteracting in band steel both sides to blow pressure power.Particularly when unit production approached specification, air knife dross and obstruction were frequent, had a strong impact on the normal operation and the strip surface quality of unit.And,, then be difficult to it is cleared up in case produce dross because air knife nozzle cutter lip slit height is less.

The utility model content

Technical problem to be solved in the utility model provides a kind of anti-dross device of air knife that can eliminate air knife dross phenomenon effectively.

The technical scheme that its technical problem that solves the utility model adopts is: air knife of the present utility model is prevented the dross device, it is characterized in that: it comprises that two covers are arranged at the blowing device of being with outside the steel two sides respectively, is produced and the air-flow of being with steel traffic direction contrary outside band steel two sides by this two covers blowing device.

After taking abovementioned technology, because blowing device can produce the air-flow with band steel traffic direction contrary outside band steel two sides, make this stream pressure and flow velocity jetting pressure and flow velocity greater than two air knives, make them outside band steel two sides and form air curtain between two air knives, to block the interference of two air knife air-flows, prevent the air knife air-flow to the generation of blowing and destructiveness is turbulent, thereby avoid the generation of air knife dross phenomenon.

The beneficial effects of the utility model are, can eliminate air knife dross phenomenon effectively, guarantee the air knife works better, help improving the quality of galvanized steel product; Simple in structure, easy to operate.

Description of drawings

This specification sheets comprises following three width of cloth accompanying drawings:

Fig. 1 is air knife structure and the synoptic diagram that produces dross in cutter lip slit;

Fig. 2 is the set-up mode synoptic diagram of the anti-dross device of the utility model air knife;

Fig. 3 is the structural representation of the anti-dross device of the utility model air knife.

Component, position and numbering among the figure: band steel 10, air knife 11, air knife 12, cutter lip slit 13, edge guard 14, blowing device 20, nozzle 21, pipeline 22, pressure regulator valve 23.

Embodiment

Below in conjunction with drawings and Examples the utility model is further specified.

At present all the thickness that adopts air knife control strip steel Zn-plating layer on the hot-dip galvanized steel strip production line.With reference to Fig. 1, outside the forward and backward surface of band steel 10, one group of

corresponding air knife

11,12 is set respectively, in

air knife

11,12, carry pressurized air in the production process, pressurized air removes the unnecessary zinc liquid of being with institute's adhesive tape on the steel 10 forward and backward surfaces through its nozzle cutter lip slit 13 after-blow, and galvanized layer thickness is controlled.In process of production,, in cutter lip slit 13, produce dross easily, influence

air knife

11,12 works better because

air knife

11,12 air-flows that produced are being with steel 10 both sides to get muddled, and can not get better counteracting in band steel 10 both sides to blow pressure power.Particularly when unit production approached specification,

air knife

11,12 drosses and obstruction were frequent, had a strong impact on the normal operation and the strip surface quality of unit.And,, then be difficult to it is cleared up in case produce dross because the nozzle cutter lip slit 13 of

air knife

11,12 is highly less.

With reference to Fig. 2, air knife of the present utility model is prevented the dross device, it comprises that two covers are arranged at the blowing device 20 outside band steel 10 two sides respectively, produce and the air-flow of being with steel 10 traffic direction contraries outside band steel 10 two sides by this two covers blowing device 20, because this stream pressure and flow velocity are greater than two air

knife air knives

11,12 jetting pressure and flow velocity, make its in band steel 10 two sides outer and two air knives 11, form air curtain between 12, to block two air knives 11, the interference of 12 air-flows that produce, prevent the air knife air-flow to the generation of blowing and destructiveness is turbulent, thereby avoid the generation of air knife dross phenomenon.

Fig. 3 shows a kind of concrete structure of blowing device 20.With reference to Fig. 3, described blowing device 20 comprises:

A. nozzle 21, are fixed on the edge guard 14 outside band steel 10 two sides;

B. pipeline 22, and nozzle 21 is connected with compressed air gas source.

The port of described nozzle 21 should be positioned at the above position, plane, 13 place, cutter lip slit of air knife 11,12.For improving the action effect of 20 aerogenesis air-flows of blowing device, the axis of described nozzle 21 is with respect to band steel 10 sides 3～15 degree that slope inwardly, the air curtain that blowing device 20 is produced carries out prepurge to going out zinc pot strip edge portion in advance, can effectively reduce the zinc pot strip edge portion thick possibility in formation limit.For regulating the jetting pressure and the flow velocity of blowing device 20 easily, on the described pipeline 22 pressure regulator valve 23 can be set, pressure at both sides is manually control separately separately.The suitable ovalize of the cross section of nozzle 21 can effectively dwindle the distance between band steel and the

air knife

11,12 on the one hand, can make on the other hand winding-up air-flow that both sides blowing device 20 produced with cushioned preferably after air curtain contacts.Above some principles of the anti-dross device of described the utility model air knife that just explains through diagrams.

Because the those of ordinary skill to constructed field is easy to carry out on this basis some modifications and change, therefore this specification sheets be not be the anti-dross device of the utility model air knife to be confined to shown in and in the described concrete structure and the scope of application, so every the corresponding modify and equivalent that might be utilized all belongs to the claim that the utility model is applied for.

Claims

1, the anti-dross device of air knife is characterized in that: it comprises that two covers are arranged at the blowing device of being with outside steel (10) two sides (20) respectively, is produced and the air-flow of being with steel (10) traffic direction contrary outside band steel (10) two sides by this two cover blowing device (20).

2, the anti-dross device of air knife as claimed in claim 1, it is characterized in that: described blowing device (20) comprising:

A. nozzle (21) is fixed on the edge guard of being with outside steel (10) two sides (14);

B. pipeline (22) is connected nozzle (21) with compressed air gas source.

3, the anti-dross device of air knife as claimed in claim 2 is characterized in that: the port of described nozzle (21) is positioned at the above position, plane, place, cutter lip slit (13) of air knife (11,12).

4, as the anti-dross device of claim 2 or 3 described air knives, it is characterized in that: the axis of described nozzle (21) is with respect to band steel (10) side 3～15 degree that slope inwardly.

5, the anti-dross device of air knife as claimed in claim 2, it is characterized in that: described pipeline (22) is provided with pressure regulator valve (23).