CN2169647Y - Paper two side dewatering seal forming device - Google Patents

Abstract

The utility model discloses a paper two-side dewatering seal forming device which belongs to machinery for paper making. An enclosed forming unit (1) and a vacuum pipette box (16) are arranged between two parallel circular nets (141) (14) in a circular net groove (15). The two circular nets (141) (14) can be rotated in opposite directions by a wet felt (11) through an annular net (8) and a felt pressing roller (13); a pulp overflow groove (3) is arranged above a pulp mixing plate (4) in the enclosed forming unit (1), and both sides of the pulp overflow groove are respectively provided with an arcuate plate (2). Accordingly, a forming region (5) can be formed between the arcuate plates (2) on both sides and the corresponding circular net (141) or (14), and a pulp overflow port at the upper end of the region (5) is higher than the axis of the circular nets.

Description

Paper two side dewatering seal forming device

The utility model belongs to papermaking equipment.

Page forming device is the partly crucial of paper machine, to the paper quality decisive role.Existing fourdrinier machine and garden net paper machine all are to make paper making raw material such as fiber in suspension, make it stay to filter on the wire side and form page by gravity filtration, and are to adopt single face gravity filtration dehydration mostly.Because page is when beginning moulding, fubril in the suspension and particulate filler major part flow away by filter screen, and what stay wire side is long fiber mostly, along with slurry filtering layer progressive additive, fiber fines and filler will more ground detention in slurry layer.The page of Xing Chenging thus, its positive and negative two sides fiber and filer content, fibre morphology, surface strength etc. all have tangible difference, have had a strong impact on paper quality and printing performance.

The purpose of this utility model is, designs a kind of page double dewatering enclosed shaping apparatus, makes the paper two sides performance unanimity of moulding, to improve the quality of paper, improves its printing performance, reduces production costs.

The technical solution of the utility model is, it comprises and places two parallel garden nets of garden net groove and the two axis and closed mold and two couch rolls that lay respectively at the online portion in described garden between the net of described two gardens, wet felt between a couch roll and thereon the pressure blanket roller of position through and between another couch roll and garden net, turn one's head roller through pile warp later, the wet felt deflector roll, above the wet felt between two couch rolls, vacuum transfer box is arranged, the diffusion chamber of described closed mold bottom is connected to pulp-inlet pipe and top is perforaled plate, its design feature is, ring network is installed in the top to be had on the couch roll of pressing the blanket roller and the idler roller and places described vacuum transfer box below, make two garden nets under the drive of wet felt, become opposite direction of rotation thus, excessive stock tank both sides above the perforaled plate in closed mold respectively form shaping area for arc makes between described arc and the corresponding garden net thus, and the excessive slurry mouth in the upper end of this shaping area is higher than garden net axis.

Make below in conjunction with accompanying drawing and to further specify.

Description of drawings: Fig. 1 is a sectional structure, and Fig. 2 is an A-A sectional structure among Fig. 1.In the drawings:

The 1-closed mold, 2-arc, the 3-stock tank that overflows, the 4-perforaled plate, the 5-shaping area, the 6-pulp-inlet pipe, 7-diffusion chamber, 8-ring network, 9-garden net groove clean-out opening, 10-wet felt deflector roll, 11-wet felt, 12, the 121-couch roll, 13-presses the blanket roller, 14,141-garden net, 15-garden net groove, 16-vacuum transfer box, the 17-idler roller, 18-turns one's head roller, 19-plain boiled water hole, 20-former clean-out opening.

By accompanying drawing as can be known, the utility model comprises and places parallel two the garden nets (141) (14) of garden net groove (15) and the two axis and be positioned at closed mold (1) and two couch rolls (121) (12) that lay respectively at described garden net (141) (14) top between these two garden nets (141) (14), wet felt (11) between the pressure blanket roller (13) of couch roll (141) and the side of being located thereon through and between couch roll (12) and garden net (14) through after pile warp turn one's head roller (18) and wet felt deflector roll (10), there is vacuum transfer box (16) wet felt top between two couch rolls (121) (12), the diffusion chamber (7) of the bottom of described closed mold (1) is connected to pulp-inlet pipe (6) and perforaled plate (4) is arranged at top, its design feature is, ring network (8) is installed on couch roll (121) and the idler roller (17) and places described vacuum transfer box (16) below, make thus two garden nets under the drive of wet felt (11), become the opposite direction of rotation (direction of arrow during net in two gardens in referring to Fig. 1, upper left corner arrow represents wet felt (11) traffic direction among this figure) Excessive stock tank (3) both sides that are arranged in perforaled plate (4) top of closed mold (1) respectively are arc (2), make thus between described both sides arcs (2) and corresponding garden net (141) or (14) and form shaping area (5), and the excessive slurry mouth in this shaping area (5) upper end is higher than the cylinder axis.

Design principle of the present utility model is, paper pulp enters diffusion chamber (7) by pulp-inlet pipe (6), steadily enter shaping area (5) by perforaled plate (4) uniform distribution after the diffusion of slurry stream, form the slurry layer at garden net (141) (14), surplus slurry then refluxes through the stock tank (3) that overflows; The slurry layer that is formed by garden net (141) is gone up and is written into another garden net (14) and couch roll (12) nip thereof at the lower wet felt (11) that is adsorbed in of vacuum transfer box (16) effect, after the slurry layer of this garden net (14) formation overlaps into page (realization double dewatering), through turning one's head roller (18) and wet felt deflector roll (10), enter the pressure roller with this device adjacency. The moulding transmission of whole page is led to drag by wet felt (11) and is carried out. Paper pulp is in the suspension of diffusion current stabilization, high surging, under the gravity filtration effect of two inside and outside water level pressure reduction of garden net, form l Water Paper page or leaf (i.e. slurry layer), the slurry that long fiber content is high is stayed positive and negative two surfaces of page thus, fiber fines and the more slurry of filer content are clipped in the middle part on page two surfaces, make into the in length and breadth pulling force of paper than little, banner indicated weight difference is little, and evenness is good. And equipment is simple, has also stopped the generation of rotten slurry.

As known from the above, the utility model is the page two side dewatering seal forming device, and the page two table performances of institute's moulding are consistent, has improved the quality of page, has improved its printing performance, has reduced production cost. Apparatus structure is simple, dependable performance.

The utility model can be used for the technological transformation of the two net paper machines of two (list) cylinders, and the head box of alternative common fourdrinier machine, forming table, suction couch roll, multistage squeezing, can significantly reduce page and break end simplified process equipment and operation.The level of the approximate present world advanced person's of mechanism of this device and effect vertical folder net former can be widely used in technological transformation and corollary equipment long, garden net paper machine, is the sheet forming apparatus with broad development future.

Embodiment: according to the device of accompanying drawing and said structure, be used for the two net paper machines of twin-tub supporting, produce 40 to 100 grams/square metre various paper, 1.25 meters of garden net (141) (14) diameters, long 1.8 meters.

Claims (1)

1, a kind of page double dewatering enclosed shaping apparatus, comprise and place parallel two the garden nets (141) (14) of garden net groove (15) and the two axis and be positioned at closed mold (1) and two couch rolls (121) (12) that lay respectively at described garden net (141) (14) top between these two garden nets (141) (14), wet felt (11) between couch roll (141) and thereon the pressure blanket roller (13) of position through and between couch roll (12) and garden net (14) through after pile warp turn one's head roller (18) and wet felt deflector roll (10), there is vacuum transfer box (16) wet felt top between two couch rolls (121) (12), the diffusion chamber (7) of described closed mold (1) bottom is connected to pulp-inlet pipe (6) and top is perforaled plate (4), it is characterized in that, ring network (8) is installed in couch roll (121) and goes up and place described vacuum transfer box (16) below with idler roller (17) and make two garden nets (141) (14) become opposite direction of rotation under the drive of wet felt (11), excessive stock tank (3) both sides that are arranged in perforaled plate (4) top of closed mold (1) respectively are arc (2), form shaping area (5) and make thus between described arc (2) and corresponding garden net (141) or (14), and the excessive slurry mouth in the upper end of this shaping area (5) is higher than garden net axis.

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