CN2612718Y

CN2612718Y - Shaping apparatus of long mesh paper making machine

Info

Publication number: CN2612718Y
Application number: CN 03225770
Authority: CN
Inventors: 周庆乐; 刘建安; 樊慧明; 雷以超; 谭志仁
Original assignee: South China University of Technology SCUT
Current assignee: South China University of Technology SCUT
Priority date: 2003-05-07
Filing date: 2003-05-07
Publication date: 2004-04-21
Anticipated expiration: 2013-05-07

Abstract

The utility model relates to a forming device which is arranged on the upper portion of a fourdrinier paper machine fourdrinier table. The forming device comprises a ring net, an upper and a lower forming rolls which support the ring net, and inlet and outlet net leading rolls used to guide the ring net, wherein the lower ring net and the fourdrinier paper machine fourdrinier table form a dehydration wedge-shaped area and a crossed area, and the ring net is driven by a bottom net. The utility model solves quality problem of fourdrinier paper-making, and improves the adaptive capacity of the fourdrinier paper machine for products and vehicle speed.

Description

Building mortion on the long mesh paper making machine

Technical field

The utility model relates to papermaking equipment, specifically the building mortion on the long mesh paper making machine.

Background technology

Traditional long mesh paper making machine relies on single face to dewater, thereby makes by keeping of the filler of wire side page and fiber fines lowlyer, and the page wire side of formation is positive coarse, causes the two sides difference of paper big.Simultaneously along with the carrying out of wet end dehydration, the concentration of slurry layer improves constantly, and it is poly-that the fiber in the slurry layer begins wadding, and along with the raising of concentration, the poly-degree of wadding also begins aggravation, finally causes the evenness of paper relatively poor.

Existing domestic technique is to adopt the shake of forming table or ornamenting roller (also being dandyprat) is installed, with the evenness of improving page with to reduce the two sides poor, but the improvement amplitude is extremely limited, and these methods can only be used on the low speed paper machine, in case paper machine speed is above 250 meters/minute, the employing of the shake of forming table and ornamenting roller will be restricted, shaking apparatus is because of amplitude, shake frequency does not adapt to high-speed and can not adopt, the ornamenting roller also must adopt the ornamenting roller of major diameter band transmission, make precision and installation site extremely strict requirement is all arranged, improper use or destroy the shaping paper web because of the serious water dumping of roll surface, or lose the ornamenting effect because of mass dryness fraction is too high, adding the ornamenting roller does not have dehydrating function, therefore, install the ornamenting roller additional at the long mesh paper making machine wet end, just some big slightly floc sedimentations are played the ornamenting effect, but for some tiny floc sedimentations, the effect of ornamenting roller is then not obvious, the fourdrinier part of this moment remains the single face dehydration, so the improvement of the evenness of page and two sides difference is not remarkable.

Especially domestic most fourdrinier machines all are the following traditional long mesh paper making machines of speed of a motor vehicle 500m/min, the page of this existing long mesh paper making machine production exists that two sides difference is big, evenness is bad, the defect such as printability difference of page, and adopts the wet end shake usually, adds the restriction that method that the ornamenting roller improves paper formation is subjected to the paper motor speed.

Because being installed, the technology of ornamenting roller do not possess the double side dewatering function on existing long mesh paper making machine, it is poor to solve the structural two sides of page, and because of its to the strictness of web dryness area requirement, simultaneously under high-speed condition, the effect of ornamenting roller is restricted, and can not improve paper formation effectively.

The utility model content

The purpose of this utility model is the defective at the prior art existence, building mortion on a kind of long mesh paper making machine is provided, solve the present domestic fourdrinier wire existing page quality problem of manufacturing paper with pulp, thereby improved the adaptive capacity of existing long mesh paper making machine widely the product and the speed of a motor vehicle.The utility model both had been adapted to transform on traditional long mesh paper making machine, be suitable for again using on the new paper machine, can improve the operation of paper machine at all, obviously improve the quality of products with lower cost of investment, reach or, improve the competitiveness of enterprise product effectively near the properties of product of twin wire paper machine.

Building mortion on the fourdrinier machine of the present utility model, be that a building mortion is installed above the long mesh paper making machine forming table, described building mortion is made of ring network, the upper and lower forming rolls that supports ring network, the import and export wite roll that is used for the pessum net, form dehydration tapered region and Jia Qu with the long mesh paper making machine forming table below the described ring network, ring network is driven by spacer screen.

Described building mortion preferably is installed in the forming table top before the typing of long mesh paper making machine l Water Paper page or leaf.Can reach the effect that improves formation of sheet, reduces paper two sides difference like this.

The utility model increases a ring network above the long mesh paper making machine forming table, l Water Paper page or leaf forming process is passed through between ring network and forming table two layers of mesh, make the dehydration of paper web upper and lower surface, simultaneously by extruding and hydraulic action between the two layers of mesh, the loosen collagen fibre wadding is poly-, reduces the fiber floc sedimentation in the l Water Paper page or leaf, improves paper formation, it is poor to reduce the structural two sides of page, thereby arrives the purpose that obviously improves page quality.

Building mortion on the long mesh paper making machine of the present utility model, by on the appropriate location of long mesh paper making machine wet end, adding one deck forming net again, before shaping page prepattern, carry out obsessive double dewatering, to improve paper formation, the two sides that reduces shaped structure is poor, and forming effect is shaped near the folder net, and its improvement to paper quality obviously is better than the ornamenting roller.Building mortion both had been suitable for the wet end transformation of traditional old fourdrinier machine on the basis, also was suitable for the paper machine that newly starts; This device not only is suitable for the high speed long mesh paper making machine, and is suitable for the low-medium speed long mesh paper making machine.With existing fourdrinier machine relatively, installed building mortion of the present utility model additional after, reflect the advantage and the effect of following each side:

1, can improve formation of sheet effectively;

2, the two sides that can obviously reduce on the paper structure is poor, and is poor as the two sides of indexs such as surface strength, printing performance, surface structure, whiteness, smoothness, glossiness;

3, improve the surface strength of paper effectively, reduce the scumming phenomenon of printing paper;

4, suitably improve paper strength, opacity;

5, quicken the dehydration of wet end, improve the speed of a motor vehicle;

6, do not need to increase transmission, do not increase even can reduce power consumption;

7, improve the product and the speed adaptation capability of long mesh paper making machine;

8, reduce the wearing and tearing of forming web;

9, easy for operation.

Description of drawings

Fig. 1 is the utility model structural representation.

The specific embodiment

As shown in Figure 1, building mortion of the present utility model is installed in long mesh paper making machine forming table top, by last forming rolls 1, down forming rolls 2, scrape water cutter 3, the water receiving container made of bamboo, wicker, ratten, etc. 4, import and export tapered region wite roll 5, tight net roller 6, school net roller 7, wite roll 8, ring network 9 and frame 10 formed.

Frame 10 is made up of four columns and four crossbeams, by fore side and each two root post of transmission side, is provided with activity by two root posts of fore side and shifts out piece, respectively establishes two cantilever beams by the column of transmission side, so that replace with forming net.Last building mortion except that following forming rolls 2 and scraping the water cutter is installed on the frame of long mesh paper making machine wet end, remaining device all is installed on the frame 10, by ring network 9 around.The top of last building mortion, the ring network installed inside tight net roller 6, school net roller 7, wite roll 8, be respectively applied for tensioning, adjustment and pessum net, and play the effect of supporting ring network; The left and right sides of last building mortion bottom, but wite roll 5 not only vertically adjustable but also that level is regulated respectively is installed on the column of front and back, form and import and export tapered region, so as the ring network that building mortion is gone up in control in importing and exporting tapered region with the angle of fourdrinier part.The centre of last building mortion bottom, the ring network installed inside one go up forming rolls 1, but this forming rolls up-down adjustment, but its bearing block is installed on the arm of up-down adjustment; The bottom of last building mortion, two following forming rolls 2 have been installed in the ring network outside, and its position lays respectively at the front and back of forming rolls, has formed the folder district.Between the left side and following forming rolls of last forming rolls, the installed inside of ring network is scraped the water cutter 3 and the water receiving container made of bamboo, wicker, ratten, etc. 4, and the water that last building mortion removes enters the water receiving container made of bamboo, wicker, ratten, etc. 4 by scraping water cutter 3, so that plain boiled water is taken away from the water receiving container made of bamboo, wicker, ratten, etc. 4.Between the right side and following forming rolls of last forming rolls, the outside of ring network also is equipped with scrapes water cutter 3, is used to strike off the water that spacer screen removes, and further improves web dryness.

During work, the l Water Paper page or leaf enters tapered region by fourdrinier part, the slurry layer is squeezed in tapered region, producing disturbance disperses floc sedimentation and forces its fast dewatering, the folder district that enters down subsequently 2 of forming rolls further forces dehydration, respectively be equipped with inside and outside the folder district forming net and scrape water cutter 3, the plain boiled water that last forming net is deviate from falls into after scraping water cutter 3 outside the water receiving container made of bamboo, wicker, ratten, etc. 4 discharge machines, and the plain boiled water that spacer screen is deviate from scrapes through lower coating blade and falls into white wate tray.Low vacuum chopping board case and moisture absorption case are housed under the import tapered region spacer screen, enter tapered region slurry layer concentration so that regulate, under the outlet tapered region spacer screen suction flat box is housed, follow off line walk so that inhale the paper transfer page or leaf, scrape the water cutter and the water receiving container made of bamboo, wicker, ratten, etc. in the folder district and can reach the front and back adjusting up and down, scraper all is housed, so that in time water on the roll surface and fiber are disposed on forming rolls and the wite roll.The vacuum of chopping board case (or wet suction box), the water receiving container made of bamboo, wicker, ratten, etc. is formed by centrifugal exhauster, and plain boiled water enters white water chest behind separator, and separator top links to each other with blower fan.

Building mortion is driven by fourdrinier part on the basis, and itself need not transmission.

The installation site of last building mortion is an important techniques index, usually require to enter the slurry floor initial concentration in building mortion and spacer screen folder district between 0.9% ~ 1.5%, the starting point that the end point of the Surfing Zone of traditional long mesh paper making machine and shaping just distinguished, before this, paper stock mainly passes through gravity dehydration.Enter after the building mortion district, paper stock will be by district and the drying zone of being shaped, and after drying zone finishes, the l Water Paper page or leaf will separate with last building mortion, enter the High Pressure Difference drying zone of traditional fourdrinier part.

Building mortion both had been suitable for old long mesh paper making machine transformation on the basis, improved paper motor speed and product quality, was suitable for new long mesh paper making machine design again, improve paper machine output and promote product specification, according to different use occasions, as paper machine speed, copy wide etc. the design, make by figure, form series of products.

Claims

1, the building mortion on a kind of fourdrinier machine, it is characterized in that above the long mesh paper making machine forming table, installing a building mortion, described building mortion is made of ring network, the upper and lower forming rolls that supports ring network, the import and export wite roll that is used for the pessum net, form dehydration tapered region and Jia Qu with the long mesh paper making machine forming table below the described ring network, ring network is driven by spacer screen.

2,, it is characterized in that the forming table top before described building mortion is installed in the typing of long mesh paper making machine l Water Paper page or leaf according to the building mortion on the described fourdrinier machine of claim 1.