雙刮刀是兩臺(tái)雙氣囊刮刀合用的方式。目的是為了去除附著在輥面上的水分及臟東西為目的。使用過程中，棍子表面上會(huì)有許多凹凸不平的小孔，刀刃的磨擦面也會(huì)有同樣現(xiàn)象。因而，微小的臟東西及水分就會(huì)透過這些小孔，順流到刮刀后表面。由于臟東西有些被紙張帶走，另一些粘結(jié)在刮刀背后形成塊狀物，許久過后容易掉下，從而造成斷紙，以致停機(jī)。特別是壓榨部的石輥等，此現(xiàn)象比較嚴(yán)重。除此之外，刮刀片施加較大的線壓時(shí)，會(huì)在刀片背后產(chǎn)生負(fù)壓，這個(gè)負(fù)壓會(huì)造成在刀片正面堆積許多臟東西，也會(huì)嚴(yán)重地影響產(chǎn)品質(zhì)量。
在中心壓榨部、網(wǎng)部伏輥等加裝雙刮刀。利用離心力的作用，伏輥、真空壓輥孔內(nèi)水及細(xì)小纖維非出并附著于輥刮刀能破壞其表面張力，清除部分水及細(xì)小纖維，并在刮刀之后形成微小負(fù)壓將孔內(nèi)水及細(xì)小纖維*排出后由第二刮刀清理。
雙氣囊刮刀可以有效的解決這些問題，在保持線壓、材質(zhì)和角度問題的基礎(chǔ)上，保持輥面的運(yùn)行清潔，減少斷頭及紙病，并有效保護(hù)輥面，延長(zhǎng)棍子的使用壽命，減少停機(jī)更換維護(hù)的頻率，提高經(jīng)濟(jì)效益。
YZX-DAS Double-Blade Device（Double Blades Air Cell Pressure Control）
The double-blade device, made up by two air-cell blades, it means using two air-cell blades at the same time. It is used to remove the moisture and dirt attached to the roller surface. During the operation, plenty of pores will form on the roller surface as well as on the abrasive side of edge. Therefore, small dirt and moisture will enter into the back surface of blade through these pores. Some dirt will be taken away be paper, while some will attach to the back of blade, forming lumps which will drop after a long time, thus causing paper breakage and even machine halt. Such condition is even more serious for the stone roller in the press section. In addition, a great lineal pressure exerted by the blade may produce negative pressure at the back of blade which causes plenty of dirt to gather on the front of blade, thus seriously affecting product quality.
The double-blade device is equipped in the central press section, couch roll in the net section and so on. Under the action of centrifugal force, the moisture and fine fibers will be thrown away from the pores of couch roll and vacuum compression roller, and then attach to the first blade which is able to destroy their surface tension, remove part of moisture and fine fibers and form a small negative pressure behind the blade. The second blade will clear away the moisture and fine fibers expelled from the pores by the small negative pressure.
The double air-cell blades can effectively solve these problems. It is able to keep the roller surface clean while maintaining a proper lineal pressure and angle and protecting materials. Besides, it can reduce ends down and paper defects, effectively protect roller surface, prolong the service life of roller, and reduce the frequency of shutdown for replacement and maintenance, thus improving the economic benefit.
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