阅读说明：本技术 一种风刀 (A kind of air knife ) 是由 冯静 李军 章华兵 李国保 于 2019-09-05 设计创作，主要内容包括：本发明涉及机械设备技术领域,特别涉及一种能够用来刮平钢板上的涂液的风刀。一种风刀,用于刮平钢板上的涂层,包括两个组装在一起的上刀片和下刀片,以及围挡在上刀片和下刀片两侧的侧挡板,其特征在于,所述上刀片和所述下刀片之间形成有多个顺次连通的腔室；多个顺次连通的所述腔室一端与所述风刀的进气口连通,另一端与所述风刀的排气口连通；与所述进气口连通的所述腔室的容积大于其他的所述腔室的容积；与所述排气口连通的所述腔室的容积小于其他的所述腔室的容积。本发明通过采用多个腔室连通的方式,并将这些腔室具备不同大小的容积,可以将来自进气口的气流充分的混合,解决了现有技术中风刀难以刮平带钢表面涂层的技术问题。(The present invention relates to mechanical equipment technical field, in particular to a kind of air knife that can be used to scrape the masking liquid on plain plate.A kind of air knife, for scraping the coating on plain plate, the side baffle of the cutter and bottom knife and enclosing that are fitted together including two in cutter and bottom knife two sides, it is characterized in that, being formed with multiple chambers being sequentially connected between the cutter and the bottom knife；Multiple chambers being sequentially connected to are connected to the air inlet of the air knife, and the other end is connected to the exhaust outlet of the air knife；The volume for the chamber being connected to the air inlet is greater than the volume of other chambers；The volume for the chamber being connected to the exhaust outlet is less than the volume of other chambers.These chambers and are had different size of volume by using the mode of multiple chambers by the present invention, the air-flow from air inlet can adequately be mixed, solve air knife in the prior art and be difficult to the technical issues of striking off the strip steel surface coating.)

1. a kind of air knife, for scraping the coating on plain plate, the cutter and bottom knife fitted together including two, Yi Jiwei Keep off the side baffle in cutter and bottom knife two sides, which is characterized in that be formed between the cutter and the bottom knife more A chamber being sequentially connected to；

Multiple chambers being sequentially connected to are connected to the air inlet of the air knife, the exhaust outlet of the other end and the air knife Connection；

The volume for the chamber being connected to the air inlet is greater than the volume of other chambers；

The volume for the chamber being connected to the exhaust outlet is less than the volume of other chambers.

2. air knife as described in claim 1, which is characterized in that the setting of the air inlet of the air knife is in the cutter and described On side baffle.

3. air knife as described in claim 1, which is characterized in that the air knife perpendicular to length direction section, and it is close The side of the exhaust outlet is tapered；

The sharp bottom of the taper is directed away from the direction of the air knife.

4. air knife as described in claim 1, which is characterized in that on the face relative to each other of the cutter and the bottom knife Multiple grooves are equipped with, the extending direction of the groove is consistent with the length direction of the air knife；

Multiple grooves are arranged in the air knife, are correspondingly formed multiple chambers.

5. air knife as claimed in claim 4, which is characterized in that the groove is rectangle groove.

6. air knife as claimed in claim 4, which is characterized in that by being arranged on described between two adjacent grooves Channel connection between blade and bottom knife.

7. air knife as claimed in claim 4, which is characterized in that multiple chambers include first chamber, second chamber, third Chamber and the 4th chamber；

Wherein, the first chamber, third chamber and the 4th chamber are distributed on the bottom knife；

The second chamber is distributed on the cutter；

The first chamber is connected to the air inlet, and the 4th chamber is connected to the exhaust outlet.

8. air knife as claimed in claim 7, which is characterized in that the 4th chamber is in water droplet perpendicular to the section of length direction Shape.

9. air knife as claimed in claim 7, which is characterized in that by described logical between the 4th chamber and the exhaust outlet Road connection.

10. air knife as claimed in claim 9, which is characterized in that for being connected to the logical of the 4th chamber and the exhaust outlet Road, the gap that other channels of the gap-ratio formed on the air knife are formed on the air knife are small.

11. air knife as described in claim 1, which is characterized in that be provided with gasket between the cutter and the bottom knife.

Technical field

The present invention relates to mechanical equipment technical field, in particular to a kind of wind that can be used to blow the masking liquid on plain plate Knife.

Background technique

Orientation silicon steel wants high annealing after decarburizing annealing, to prevent the adhesion between strip, needs to apply in belt steel surface Upper magnesium oxide coating, this process may be generally referred to as steel plate masking liquid.At high operating temperatures, due to the magnesium oxide coating of masking liquid Main main component is magnesia, therefore magnesium oxide coating is easy to react to form magnesium silicate bottom with strip surface layer, i.e., Separation layer, to realize the effect for preventing adhesion between strip.

In masking liquid, most important step is to smear magnesium oxide coating uniformly, and reach suitable thickness.Magnesia applies If layer is excessively thin, enough amounts are not achieved, finally formed separation layer also can be excessively thin, it is difficult to which effect is effectively protected in acquisition. If magnesium oxide coating is blocked up, brought into the excess moisture of annealing furnace by strip, will affect the quality for the separation layer to be formed, finally Also it is difficult to obtain that effect is effectively protected.

Summary of the invention

The purpose of the present invention is to provide a kind of air knives, are easy to appear air turbulence to solve existing air knife, it is difficult to scrape The technical issues of flat the strip steel surface coating.

In order to solve the above technical problems, the present invention provides a kind of air knife, for scraping the coating on plain plate, including two groups Side baffle of the cutter and bottom knife and enclosing being fitted together in cutter and bottom knife two sides, the cutter and institute It states and is formed with multiple chambers being sequentially connected between bottom knife；

Multiple chambers being sequentially connected to are connected to the air inlet of the air knife, the row of the other end and the air knife Port connection；

The volume for the chamber being connected to the air inlet is greater than the volume of other chambers；

The volume for the chamber being connected to the exhaust outlet is less than the volume of other chambers.

Further, the air inlet of the air knife is arranged on the cutter.

Further, the air knife perpendicular to length direction section, and close to the exhaust outlet side it is tapered；

The sharp bottom of the taper is directed away from the direction of the air knife.

Further, multiple grooves, the groove are equipped on the face relative to each other of the cutter and the bottom knife Extending direction it is consistent with the length direction of the air knife；

Multiple grooves are arranged in the air knife, are correspondingly formed multiple chambers.

Further, the groove is rectangle groove.

Further, connected between two adjacent grooves by the channel being arranged between the cutter and bottom knife It is logical.

Further, multiple chambers include first chamber, second chamber, third chamber and the 4th chamber；

Wherein, the first chamber, third chamber and the 4th chamber are distributed on the bottom knife；

The second chamber is distributed on the cutter；

The first chamber is connected to the air inlet, and the 4th chamber is connected to the exhaust outlet.

Further, it is connected between the 4th chamber and the exhaust outlet by the channel.

Further, for being connected to the channel of the 4th chamber and the exhaust outlet, the gap formed on the air knife It is smaller than the gap that other channels are formed on the air knife.

Further, the 4th chamber is in water-drop-shaped perpendicular to the section of length direction.

Further, gasket is provided between the cutter and the bottom knife.

In air knife provided by the invention, has difference by using the mode of multiple chambers, and by these chambers The volume of size can adequately mix the air-flow from air inlet, and high degree eliminates air inlet in length direction Upper structure unevenly caused by air velocity and pressure non-uniform phenomenon, solving air knife in the prior art, to be easy to appear air-flow disorderly Disorderly, it is difficult to the technical issues of striking off the strip steel surface coating.

Detailed description of the invention

Fig. 1 is air knife overall structure diagram provided in an embodiment of the present invention；

Fig. 2 is the cross section structure schematic diagram of air knife provided in an embodiment of the present invention.

Specific embodiment

According to above content it is found that traditional air knife is easy to appear air turbulence when striking off for the strip steel surface coating, The strip steel surface coating is caused to occur having the uneven distribution feature of longitudinal stripe.Therefore, it is difficult to obtain preferable strip to prevent adhesion Effect.

Inventor has found that the reason of leading to air turbulence is traditional wind by analyzing and researching to air turbulence phenomenon Knife interior air-flow paths are difficult to be sufficiently mixed the air-flow come in, and can not be formed caused by equally distributed gas.Therefore this hair The bright air flow path by existing air knife, which carries out creative design, to be realized and is filled by the way of multiple chamber combines Divide the air for being mixed into air knife, finally obtains uniform high speed laminar air flow.

Below in conjunction with the drawings and specific embodiments to the air knife proposed by the present invention for scraping coating on plain plate make into One step is described in detail.According to claims and following explanation, advantages and features of the invention will be become apparent from.It should be noted that Attached drawing is all made of very simplified form and using non-accurate ratio, only to convenient, lucidly aid illustration is of the invention The purpose of embodiment.