CN2273731Y

CN2273731Y - Air-cushion type pressure pulp flow box

Info

Publication number: CN2273731Y
Application number: CN 96237222
Authority: CN
Inventors: 曾一鸣; 曾乃哲; 李在照
Original assignee: JIAMING MACHINOFACTURE CO Ltd DONGGUAN CITY
Current assignee: JIAMING MACHINOFACTURE CO Ltd DONGGUAN CITY
Priority date: 1996-07-19
Filing date: 1996-07-19
Publication date: 1998-02-04
Anticipated expiration: 2006-07-19

Abstract

The utility model relates to an air-cushion type pressure pulp flow box, belonging to the papermaking technical field. The utility model can mainly reach the homogeneous pulp distributing effect and design. The utility model is mainly characterized in that a flow-regime regulating flow passage can replace the box body of the existing pulp flow box; the flow-regime regulating flow passage comprises a diffusion chamber, a rectifier roller, a throttling flow port, a gradual enlarging flow passage, and a gradual reducing flow passage; the proper position of the flow-regime regulating flow passage is communicated with a pulp containing chamber and an air cushion on the pulp containing chamber. The utility model is mainly matched with a fourdrinier papermaking machine to use.

Description

Air bells loaded headbox

The utility model belongs to pulp technology for making paper, particularly relates to main and the supporting head box of fourdrinier machine.

Open type head box more commonly at present, its structure is simpler, mainly contain wooden or a steel frost boiling groove and a weir plate,, a doctor-roll and the labial lamina of the neat mouth of weir plate up and down, because the resistance of tank wall, the effect of doctor-roll is little in addition, make that the cloth slurry is irregular, the cross direction ration difference of page is big, and is main owing to only depend on liquid level difference to keep hydrostatic head to guarantee slurry-outlet velocity, makes that the head box on the high-speed paper machine must have tall and big physical dimension.So high speed paper machine adopts the closed head box more, it produces hydrostatic head with the adjustable air pressure above the slurry liquid level, so claim air bells loaded headbox again.It includes into casing, doctor-roll, weir plate and the control set for adjusting of slurry distributor, inner liner stainless steel plate, slurry is irregular but also there is cloth in existing air bells loaded headbox, the big defective of cross direction ration difference of page, its reason mainly is that the effect of doctor-roll in the casing of big volume is little, it is steady to be difficult to make slurry to reach " macroscopic view ", has the desirable fluidised form of microturbulence simultaneously again.

The purpose of this utility model provides and a kind ofly can be adapted to high speed of a motor vehicle paper machine, and cloth is starched uniform air bells loaded headbox.

The purpose of this utility model is to realize like this.

A kind of air bells loaded headbox, include into slurry distributor, fluidised form is adjusted runner (existing is casing and doctor-roll), the labial lamina of forming by upper and lower weir plate, control set for adjusting, it is characterized in that: described fluidised form is adjusted runner, include: a diffuser casing that advances slurry from its bottom, portion is provided with preceding doctor-roll near the position of outlet within it, the outlet of diffuser casing is close to restriction, is a flaring runner subsequently, is provided with the back doctor-roll after the flaring runner, follow again by the convergent runner, above the doctor-roll of back, be communicated with the appearance slurry chamber that air cushion is arranged.

Enter the slurry that fluidised form is adjusted runner through advancing to starch distributor, slow down at diffuser casing and spread, fiber wherein is divergent shape more, form microturbulence through preceding doctor-roll and restriction, again through the flaring runner slow down, current stabilization, again through back doctor-roll formation microturbulence, quicken through the convergent runner, flow out online by labial lamina.As seen the utility model is being kept slurry stream integral body stably under the prerequisite, sudden change or the gradual change that makes it to produce flow velocity at diffuser casing, restriction, flaring runner, convergent runner on the one hand, mainly contain be beneficial to slurry the net front and back even, simultaneously again through front and back twice doctor-roll, laterally interweaving of reinforcing fibre, make slurry even about net, created condition thereby produce high-quality paper at high speed for fourdrinier machine.

Introduce the utility model below in conjunction with accompanying drawing:

Fig. 1 is a schematic diagram of the present utility model.

Fig. 2 is a schematic diagram of into starching distributor.

Air bells loaded headbox shown in Figure 1 comprises that into slurry distributor 1, fluidised form are adjusted runner, top slice 31, following weir plate 32, control set for adjusting and frame, casing etc.

Advance to starch distributor 1 side's of being Taper Pipe (not shown) and mix vertical multitube and form, the cross section of vertical multitube as shown in Figure 2, the slurry in the square Taper Pipe through 11 shuntings of tens of tubules, reaches the flow velocity and the slurry concentration basically identical of all-pass stream interface.

Fluidised form is adjusted runner and is being comprised successively: a diffuser casing 21 that advances slurry from its bottom, portion is provided with preceding doctor-roll 22 near the position of outlet within it, the outlet of diffuser casing 21 is close to restriction 23, be a flaring runner 24 subsequently, be provided with back doctor-roll 25 after the flaring runner 24, follow again by convergent runner 26, above the doctor-roll 25 of back, be communicated with the appearance slurry chamber 27 that air cushion is arranged.

Flaring runner 24 is comparatively long narrow, and its center line has the inclination angle about 10 degree.

The roller footpath of preceding doctor-roll 22 and back doctor-roll 25, the aperture, percent opening, rotating speed can be inequality.

Top slice 31 weir plate 32 down is long, makes the slurry jet nit point surpass the center line of breast roll 9, drops on the profiled sheeting, can eliminate again simultaneously and spatter the slurry phenomenon.

Fluidised form is adjusted the upper end of the loam cake (part shown in the curve of process point 101,102,103,104,105 among Fig. 1) of runner, is connected with frame with hinge, can open so that keep in repair and clean.

Claims

1, a kind of air bells loaded headbox, include into slurry distributor (1), fluidised form is adjusted runner, by top slice (31), the labial lamina that following weir plate (32) is formed, control set for adjusting, it is characterized in that: described fluidised form is adjusted runner and is included: a diffuser casing (21) that advances slurry from its bottom, portion is provided with preceding doctor-roll (22) near the position of outlet within it, the outlet of diffuser casing (21) is close to restriction (23), be a flaring runner (24) subsequently, flaring runner (24) is provided with back doctor-roll (25) afterwards, follow again by convergent runner (26), be communicated with the appearance slurry chamber (27) that air cushion is arranged in the top of back doctor-roll (25).

2, air bells loaded headbox according to claim 1 is characterized in that: flaring runner (24) is comparatively long narrow, and its center line has the inclination angle about 10 degree.

3, air bells loaded headbox according to claim 1 is characterized in that: weir plate (32) is long down for top slice (31).

4, air bells loaded headbox according to claim 1 is characterized in that: the upper end that fluidised form is adjusted the loam cake of runner is connected with frame with hinge.

5, according to claim 1 or 2 or 3 or 4 described air bells loaded headbox, it is characterized in that: it advances to starch distributor (1) is to mix vertical multitube by square Taper Pipe to form.