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JPH0440477B2 - - Google Patents

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Publication number
JPH0440477B2
JPH0440477B2 JP20788484A JP20788484A JPH0440477B2 JP H0440477 B2 JPH0440477 B2 JP H0440477B2 JP 20788484 A JP20788484 A JP 20788484A JP 20788484 A JP20788484 A JP 20788484A JP H0440477 B2 JPH0440477 B2 JP H0440477B2
Authority
JP
Japan
Prior art keywords
wire
box
batten
raw material
pressure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
JP20788484A
Other languages
Japanese (ja)
Other versions
JPS6189397A (en
Inventor
Masafumi Ebihara
Takeshi Akitomo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Heavy Industries Ltd
Original Assignee
Mitsubishi Heavy Industries Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mitsubishi Heavy Industries Ltd filed Critical Mitsubishi Heavy Industries Ltd
Priority to JP20788484A priority Critical patent/JPS6189397A/en
Publication of JPS6189397A publication Critical patent/JPS6189397A/en
Publication of JPH0440477B2 publication Critical patent/JPH0440477B2/ja
Granted legal-status Critical Current

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Description

【発明の詳細な説明】[Detailed description of the invention]

1 走行するワイヤを複数の凸部で多角形状に中
高で支持する目板と、同目板を支持する加圧箱と
よりなり、同目板の各々の凸部はワイヤ走行方向
に狭くなるくさび状空間をワイヤと形成し、同各
凸部間の凹み部は加圧供給用貫通孔に通じ、同目
板の貫通孔は前記加圧箱に通じていることを特徴
とする加圧式脱水装置。
1 Consists of a batten that supports the running wire in a polygonal shape with multiple convex parts, and a pressure box that supports the batten, and each convex part of the batten is a wedge that narrows in the wire running direction. A pressurized dewatering device characterized in that a shaped space is formed with a wire, a recess between each convex part communicates with a pressure supply through hole, and a through hole of the same plate communicates with the pressurizing box. .

【発明の詳細な説明】[Detailed description of the invention]

(産業上の利用分野) 本発明は2枚網式ワイヤパート用加圧式脱水装
置に関するものである。 (従来技術) 第4図は従来の2枚式ワイヤパートに用いられ
ている曲面式吸引脱水箱(サクシヨンボツクス)
の例を示す。第4図において原料1を挟んだワイ
ヤ2及び3は、フオーミングシユーと呼ばれる脱
水域を経た後、デフレクタ4でワイヤ表面の白水
を掻き取られ、この吸引脱水箱により脱水され
る。 吸引脱水箱は真空源と配管で結ばれた吸引箱5
と、箱のワイヤ摺動面部を覆う目板6から成り、
同目板6にはワイヤ及び原料に対し均等に真空圧
をかけ、脱水された白水を速やかに吸引箱5に導
入できるよう配慮された所定の丸孔や長孔7が設
けてある。なお、第4図の例では目板6は曲面と
なつているが、ワイヤパートの構成により平面を
なすものも多く使用されている。 この曲面式吸引箱上を通過する原料1には、吸
引箱5からの真空圧とともに外側のワイヤ2のテ
ンシヨンにより曲率に応じた圧力が発生しようと
して、2つの作用力の合成により多量の脱水を行
なうことができる。脱水された原料は、一般にバ
キユームデフレクタ8等で外側に滲んでいる白水
を除かれた後、サクシヨンクーチロール9で更に
脱水されて内側ワイヤ3上に載つた上でプレスへ
移送される。 第5図は従来のハイブリツド式と呼ばれるワイ
ヤパートの例である。図において23は3室に分
れた吸引箱部、24は2枚のワイヤ21,22に
挟まれた原料20を下側のワイヤ21に確実に載
せるための吸引脱水箱、25はこの原料を所定濃
度まで脱水するための吸引脱水箱である。また第
6図は第5図の吸引箱23の目板部26の拡大図
である。 しかしこれらの脱水箱は、真空圧又はワイヤテ
ンシヨンによる圧力、あるいはその両方で原料の
脱水を図り、目板で白水を掻き取る方式となつて
いるため、ワイヤと目板の摩擦抵抗が非常に大き
く、ワイヤの摩滅とともに多大の駆動動力を必要
とする。また脱水された白水は、その大部分が吸
引箱へ導かれる為、白水の流れ勾配を考慮した吸
引箱が必要であり、真空源と吸引箱の結合部には
白水を分離させて真空配管側へ過剰の白水飛沫
(ミスト)や白水が流れ込まないようセパレータ
を設ける必要があつた。 (発明が解決しようとする問題点) 本発明は、従来の吸引脱水箱が大気との差圧を
利用した脱水方式よりなり、白水が吸引箱に流入
するため多くの設計的制約を受ける等の問題点を
解決し、逆に加圧することにより差圧を与えて前
記従来の制約を解消しようするものである。 (問題点を解決するための手段) このため本発明は、走行するワイヤを複数の凸
部で多角形状に中高で支持する目板と、同目板を
支持する加圧箱とよりなり、同目板の各々の凸部
はワイヤ走行方向に狭くなるくさび状空間をワイ
ヤと形成し、同各凸部間の凹み部は加圧供給用貫
通孔に通じ、同目板の貫通孔は前記加圧箱に通じ
ている構成を有し、これを問題点解決のための手
段とするものである。 (作用) ワイヤに挟まれた原料は、目板の凸部を通過す
る毎に進行方向が少しずつ屈曲され、外側ワイヤ
のテンシヨンにより圧力が上り、両ワイヤを通し
て脱水される。また原料が凸部間を通過する際に
は、加圧空気が働くので、この時の脱水は大部分
は外側ワイヤ側へ流れ、若干内側へも流れる。内
側へ脱水された白水はくさび状空間により再度原
料側へ押し戻され、ワイヤと目板との間を潤滑す
る。 (実施例) 以下本発明の実施例を図面について説明する
と、第1図〜第3図は本発明の実施例を示す。先
ず第1図において原料40を挟んだワイヤ41、
42は、フオーミングシユーと呼ばれる脱水部を
経てワイヤ41,42の表面に滲んだ白水をデフ
レクタで掻き取られて加圧式脱水箱上に到る。加
圧式脱水箱は第2図の如く加圧箱44と目板45
から成り、加圧箱44には所定の加圧空気が供給
されている。また目板45は複数の凸部48でワ
イヤ42を多角形状に支持しており、各々の凸部
48はワイヤの進行とともに狭くなるくさび状空
間49をワイヤ42との間に形成するように製作
されている。また凸部間には溝51が切つてあ
り、この溝51と加圧箱44の間には多数の給気
孔50が明けられている。 加圧箱44と目板45は抄紙機のワイヤ巾より
いくらか長めにつくられるが、くさび状空間49
と溝51はワイヤ上の原料の巾に応じて端部は詰
物等によりシールされる。また加圧箱44の底部
にはドレン孔52が設けられ、浸入した白水はこ
の孔から除去する。原料はワイヤテンシヨンと加
圧空気により最終的にはワイヤ41の外側へ白水
を浸透させて脱水されるが、この白水は遠心力及
びデフレクタ46で除去される(第1図)。その
後サクシヨンクヘーチロール47で所定の濃度ま
で脱水されて次の工程へ送られる。 第3図は第5図と同じハイブリツド式ワイヤパ
ートに本発明を適用したもので、図中53は吸引
箱、54は2枚のワイヤ41,42に挟まれた原
料40を下側のワイヤ41に確実に載せるための
吸引脱水箱、55はこの原料を所定濃度まで脱水
するための吸引脱水箱である。44aは複数個に
分割された加圧箱、45は目板、48は凸部であ
る。 次に以上の如く構成された実施例について作用
を説明すると、ワイヤ41,42に挟まれた原料
40は、目板45の凸部48を通過するごとに進
行方向が少しずつ屈曲されるので、外側ワイヤ4
1のテンシヨンにより圧力が上り、両ワイヤ4
1,42を通して脱水されようとする。また原料
40が凸部48間を通過する際には、加圧空気が
働くので、この時の脱水は大部分が外側ワイヤ4
1側へ働くが、若干は内側へも流れる。内側へ脱
水された白水は、くさび状空間49により再度原
料40側へ押し戻されると同時に、ワイヤ42と
目板凸部48との間の潤滑をする。また原料を挟
んだワイヤ41,42の全面には、加圧空気の圧
力がかかるので、ワイヤテンシヨンにより生じる
圧力とともに、原料40には大きな脱水作用(大
気との差圧)として働く(これは吸引式脱水箱の
真空度と同様の働きである)。一方ワイヤ42と
目板凸部48との機械的接触面圧は著しく下が
る。この接触面圧の低下は吸引式と比べ全く逆の
作用である。 原料に対する影響は、吸引式の場合は目板が作
用を与えるワイヤのすぐ内側の原料が濃縮される
のに対し、本発明の場合は外側が濃縮される点に
大きな違いがある。この為本発明では、濃縮され
た原料マツトに目板による衝撃が直接伝わらない
ので、マツトの破壊が起こりにくい。然しながら
目板側の白水は、一部は目板側へ脱水されて再び
押し戻され、外側ワイヤの方へ移動して脱水され
るように白水の揺動量が大きいので、繊維の分散
作用は大きくなる。 (発明の効果) 以上詳細に説明した如く本発明は構成されてい
るので、多大の動力や保守を必要とする真空源及
び大きな口径を必要とする真空配管、真空制御設
備等が不要となり、簡便で安価な加圧設備を用い
ることができる。また目板のくさび効果等により
加圧箱には白水が溜まらないので、白水の為の流
路や配管、セパレータ等の付属装置が必要でな
く、上下左右いずれの方向にでも目板を向けるこ
とができる。 更にくさび部の白水による潤滑効果と加圧空気
のワイヤ押し上げ作用により、ワイヤと目板の接
触面圧が下るので、摩擦力が減じてワイヤの寿命
が伸び、駆動動力が減少する。また白水の揺動が
大きく、目板から受ける衝撃の原料の濃縮部に直
接作用することがないので、繊維の分散が向上
し、微細繊維や填料の歩留りが向上するととも
に、濃縮された原料マツトを壊さない。しかも構
造及び構成材料が簡単、安価となる等の効果を奏
するものである。
(Industrial Application Field) The present invention relates to a pressurized dewatering device for a two-mesh wire part. (Prior art) Figure 4 shows a curved suction box used in a conventional two-piece wire part.
Here is an example. In FIG. 4, the wires 2 and 3 sandwiching the raw material 1 pass through a dehydration area called a forming shoe, then the white water on the wire surface is scraped off by a deflector 4, and the wires are dehydrated by this suction dehydration box. The suction dehydration box is a suction box 5 connected to the vacuum source with piping.
and a batten 6 that covers the wire sliding surface of the box,
The same-grained plate 6 is provided with predetermined round holes and elongated holes 7 designed to apply vacuum pressure evenly to the wire and the raw material and to quickly introduce dehydrated white water into the suction box 5. Although the batten 6 has a curved surface in the example shown in FIG. 4, it is often used that has a flat surface depending on the configuration of the wire part. As the raw material 1 passes over this curved suction box, a pressure corresponding to the curvature is generated by the vacuum pressure from the suction box 5 and the tension of the outer wire 2, and a large amount of water is dehydrated due to the combination of the two acting forces. can be done. The dehydrated raw material is generally dehydrated by a vacuum deflector 8 or the like to remove white water seeping to the outside, and then further dehydrated by a suction couch roll 9, placed on an inner wire 3, and then transferred to a press. FIG. 5 is an example of a conventional wire part called a hybrid type. In the figure, 23 is a suction box divided into three chambers, 24 is a suction dehydration box for ensuring that the raw material 20 sandwiched between the two wires 21 and 22 is placed on the lower wire 21, and 25 is a suction box for storing this raw material. This is a suction dehydration box for dehydrating to a predetermined concentration. 6 is an enlarged view of the batten 26 of the suction box 23 shown in FIG. 5. However, these dehydration boxes use vacuum pressure, wire tension pressure, or both to dehydrate the raw material, and use a batten to scrape off white water, so the frictional resistance between the wire and the batten is extremely high. It is large and requires a lot of driving power as well as wear on the wire. In addition, most of the dehydrated white water is led to the suction box, so a suction box that takes into account the flow gradient of the white water is required. It was necessary to install a separator to prevent excess white water spray (mist) and white water from flowing into the tank. (Problems to be Solved by the Invention) The present invention solves the problem that the conventional suction dehydration box uses a dehydration method that utilizes a pressure difference with the atmosphere, and is subject to many design constraints because white water flows into the suction box. This problem is solved and the above-mentioned conventional limitations are solved by applying pressure in the opposite direction to provide a differential pressure. (Means for Solving the Problems) Therefore, the present invention consists of a batten that supports the running wire in a polygonal shape with a plurality of convex portions, and a pressure box that supports the batten. Each convex part of the batten forms a wedge-shaped space with the wire that narrows in the wire running direction, and the concave part between each convex part communicates with the pressure supply through hole, and the through hole of the batten forms a wedge-shaped space with the wire that narrows in the wire running direction. It has a structure that communicates with the pressure box, and uses this as a means to solve problems. (Function) The raw material sandwiched between the wires is bent little by little in its advancing direction each time it passes through the convex portion of the battens, pressure is increased by the tension of the outer wire, and water is dehydrated through both wires. Further, when the raw material passes between the convex portions, pressurized air acts, so most of the dewatering at this time flows toward the outer wire, and also slightly toward the inside. The white water dehydrated inside is pushed back to the raw material side by the wedge-shaped space and lubricates between the wire and the battens. (Example) Examples of the present invention will be described below with reference to the drawings. FIGS. 1 to 3 show examples of the present invention. First, in FIG. 1, a wire 41 sandwiching a raw material 40,
42 passes through a dewatering section called a forming shoe, and the white water that has seeped onto the surfaces of the wires 41 and 42 is scraped off by a deflector and reaches a pressurized dewatering box. The pressure type dehydration box has a pressure box 44 and a batten 45 as shown in Figure 2.
A predetermined amount of pressurized air is supplied to the pressurizing box 44. Further, the batten 45 supports the wire 42 in a polygonal shape with a plurality of convex portions 48, and each convex portion 48 is manufactured so as to form a wedge-shaped space 49 between the wire 42 and the wire 42, which narrows as the wire advances. has been done. Further, grooves 51 are cut between the convex portions, and a large number of air supply holes 50 are formed between the grooves 51 and the pressurizing box 44. The pressure box 44 and the batten 45 are made somewhat longer than the wire width of the paper machine, but the wedge-shaped space 49
The ends of the groove 51 are sealed with a filler or the like depending on the width of the raw material on the wire. Further, a drain hole 52 is provided at the bottom of the pressurizing box 44, and the white water that has entered is removed from this hole. The raw material is finally dehydrated by penetrating white water to the outside of the wire 41 using a wire tension and pressurized air, but this white water is removed by centrifugal force and a deflector 46 (FIG. 1). Thereafter, it is dehydrated to a predetermined concentration using a suction roller 47 and sent to the next step. FIG. 3 shows the same hybrid wire part as shown in FIG. 5 in which the present invention is applied. A suction dehydration box 55 is used to dehydrate the raw material to a predetermined concentration. 44a is a pressure box divided into a plurality of pieces, 45 is a batten, and 48 is a convex portion. Next, to explain the operation of the embodiment configured as above, the raw material 40 sandwiched between the wires 41 and 42 is bent little by little in the traveling direction each time it passes through the convex portion 48 of the battens 45. outer wire 4
1 tension increases pressure and both wires 4
1,42 to be dehydrated. Further, when the raw material 40 passes between the protrusions 48, pressurized air acts, so most of the dehydration at this time is carried out by the outer wire 4.
It works toward the 1st side, but some of it also flows inward. The white water dehydrated inside is pushed back to the raw material 40 side by the wedge-shaped space 49, and at the same time lubricates the space between the wire 42 and the batten convex portion 48. In addition, since the pressure of pressurized air is applied to the entire surface of the wires 41 and 42 that sandwich the raw material, together with the pressure generated by the wire tension, it acts as a large dehydration effect (differential pressure with the atmosphere) on the raw material 40. This function is similar to the vacuum level of a suction type dehydration box). On the other hand, the mechanical contact pressure between the wire 42 and the batten convex portion 48 is significantly reduced. This reduction in contact surface pressure is the complete opposite effect compared to the suction type. The major difference in the effect on the raw material is that in the case of the suction type, the raw material immediately inside the wire on which the batten acts is concentrated, whereas in the case of the present invention, the raw material is concentrated on the outside. Therefore, in the present invention, the impact from the battens is not directly transmitted to the concentrated raw material pine, so that the pine is less likely to be destroyed. However, some of the white water on the batten side is dehydrated to the batten side, pushed back again, and moves toward the outside wire to be dehydrated, so the amount of shaking of the white water is large, so the fiber dispersion effect becomes large. . (Effects of the Invention) Since the present invention is configured as described in detail above, a vacuum source that requires a large amount of power and maintenance, vacuum piping that requires a large diameter, vacuum control equipment, etc. are not necessary, and it is simple and convenient. Therefore, inexpensive pressurizing equipment can be used. In addition, because white water does not accumulate in the pressurized box due to the wedge effect of the batten, there is no need for flow channels, piping, separators, or other attached equipment for white water, and the batten can be oriented in any direction, up, down, left, or right. I can do it. Furthermore, the lubrication effect of the white water in the wedge portion and the push-up effect of the pressurized air on the wire lower the contact surface pressure between the wire and the batten, reducing the frictional force, extending the life of the wire, and reducing the driving power. In addition, since the white water is shaken so much that the impact received from the batten does not directly affect the concentrated part of the raw material, the dispersion of fibers is improved, the yield of fine fibers and filler is improved, and the concentrated raw material matte is Don't break it. Moreover, the structure and constituent materials are simple and inexpensive.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明の実施例を示す加圧式脱水装置
を配設したワイヤパートの側断面図、第2図は同
要部の詳細断面図、第3図は本発明を適用したハ
イブリツド式ワイヤパートの側断面図、第4図は
従来の吸引脱水箱を設けた2枚式ワイヤパートの
側断面図、第5図は従来のハイブリツド式ワイヤ
パートの側断面図、第6図は第5図の吸引箱の目
板部の拡大図である。 図の主要部分の説明、40……原料、41,4
2……ワイヤ、44……加圧箱、45……目板、
48……凸部、49……くさび状空間、50……
給気孔、51……溝。
Fig. 1 is a side sectional view of a wire part equipped with a pressurized dewatering device showing an embodiment of the present invention, Fig. 2 is a detailed sectional view of the same essential part, and Fig. 3 is a hybrid wire to which the present invention is applied. Fig. 4 is a side sectional view of a two-piece wire part equipped with a conventional suction dehydration box, Fig. 5 is a side sectional view of a conventional hybrid wire part, and Fig. 6 is a side sectional view of the part. It is an enlarged view of the batten part of the suction box. Explanation of the main parts of the figure, 40... Raw materials, 41, 4
2... wire, 44... pressure box, 45... batten,
48...Protrusion, 49...Wedge-shaped space, 50...
Air supply hole, 51...groove.

JP20788484A 1984-10-03 1984-10-03 Press type dehydration apparatus Granted JPS6189397A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP20788484A JPS6189397A (en) 1984-10-03 1984-10-03 Press type dehydration apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP20788484A JPS6189397A (en) 1984-10-03 1984-10-03 Press type dehydration apparatus

Publications (2)

Publication Number Publication Date
JPS6189397A JPS6189397A (en) 1986-05-07
JPH0440477B2 true JPH0440477B2 (en) 1992-07-03

Family

ID=16547152

Family Applications (1)

Application Number Title Priority Date Filing Date
JP20788484A Granted JPS6189397A (en) 1984-10-03 1984-10-03 Press type dehydration apparatus

Country Status (1)

Country Link
JP (1) JPS6189397A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02160989A (en) * 1988-12-08 1990-06-20 Mitsubishi Heavy Ind Ltd Twin wire device of paper machine
US5225042A (en) * 1991-12-02 1993-07-06 Beloit Technologies, Inc. Twin wire paper forming section with heated air pressure domes

Also Published As

Publication number Publication date
JPS6189397A (en) 1986-05-07

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