CN2433060Y - Energy-saving veneer dryer - Google Patents

Abstract

The utility model relates to a special drying device for veneer of wood veneer. The utility model is different from the air-convection heat-exchanging drying principle of the common veneer roller type or mesh belt type dryer and adopts the contact pressurizing and heat transferring mode of a multi-layer hot press to rapidly enhance the temperature of the veneer, and the utility model alternately pressurizes, heats, releases pressure and discharges air according to the technological requirements of different veneer and carries out breathing type dryness for the veneer so as to enhance heat efficiency and save large amounts of electric energy and steam. The utility model is provided with a veneer feeding and discharging mechanism with a movable fork so as to ensure that the thin veneer is smoothly fed in the hot press and discharged from the hot press, and the utility model designs special movable short-distance foot-rests so as to shorten free time and enhance work efficiency.

Description

Energy-saving veneer dryer

This energy-saving veneer dryer is the special-purpose drying equipment of plywood single board, at present both at home and abroad, normally used veneer drying equipment is multilayer cylinder (or guipure) formula drying machine, in reaching tens meters case structure, blast the air that is heated by vapor heat exchanger with the air blast of some parallel connections, cause air guided flowing, the veneer that is transmitted by cylinder (or guipure) is carried out drying, this kind equipment is large automatic equipment, the investment cost height, and floor space is big.

Recent years, many producers adopt common multi-daylight press to come dried single board, comparatively fast evaporate for making veneer moisture, need repeatedly open the release of pressure steam discharge in dry run, carry out the type of respiration drying.But oil cylinder is omnidistance closed, open, and time-consuming many, power consumption greatly.The purpose of this utility model is: changing the omnidistance folding of heating platen is the short distance folding, and to cut down the consumption of energy, to raise the efficiency, it is on the operation principle basis of wood-based plate multi-daylight press, is that purpose designs with energy-conservation at the characteristics of veneer drying technology.By main frame, advance grillage, go out grillage, vapour system, hydraulic system and electric-control system etc. partly form.Main machine structure is seen Fig. 1, is made up of heating platen (2), heating platen leg rest (3), fixed step shape toe board (4), moving stair shape toe board (7) and the small oil tank (5) etc. of frame (1), master cylinder (9), steam heating.

Shaped as frame frame (1) is used to bear parts such as whole operating pressures and heating platen (2), oil cylinder (5), (9) and installs.Two ram cylinders (9) are vertically mounted on the base (10) of frame (1), and the upper end of plunger links to each other with lower roof plate (12).When plunger rose, lower roof plate (12) was with heating platen (2) and place veneer to be dried (11) block-by-block jack-up on each layer heating platen, makes all heating platen closures, thereby to the veneer pressurized, heated.

In frame (1) outside four fixed step shape toe boards (4) are housed symmetrically, each layer heating platen falls to being placed on respectively on each ladder of trapezoidal toe board by leg rest (3), makes the identical suitable interval of maintenance between each heating platen, is convenient to the into operation of plate and ejecting plate.Heating platen advance the plate side, leg-of-mutton guide plate is housed, be convenient to veneer and enter.The purpose of this utility model is achieved in that in the outside of every fixed step shape toe board, and the moving stair shape toe board (7) that promotes by means of small oil tank (5) that is installed on the hinge (6) is arranged, and it is compared with fixing toe board (4), and jump is much smaller.After the heating platen closure first time, movable toe board (7) enters the operating position under small oil tank (5) promotes, and be on the support iron (8), heating platen descends and just drops on the movable toe board, and spacing greatly reduces between the heating platen, so-called type of respiration drying stage at pressurized, heated that hockets thereafter and release of pressure steam discharge, shorten the reciprocating stroke of master cylinder greatly, saved the time, improved machine works efficient, significantly reduced energy consumption, this is the key character of this machine.

The multi-daylight press that is used for dried single board at present, because of veneer is thinner, common turnover plate mechanism can't operate as normal, so be artificial input and output material, for improving this machine operating efficiency, this machine has designed and has been suitable for the automation charging/discharging device that veneer is carried.Advance grillage and multi-daylight press commonly used to advance grillage similar, it is made of fixed frame and cage, cage drives by oil cylinder and the multiplication mechanism that is located at both sides, can do elevating movement along the vertical guide rail of fixed frame, go-cart (1) (see figure 2) is housed on the cage, be connected with the supporting plate (2) identical in the go-cart with the main frame number of plies, supporting plate (2) other end is put on the joist (3) that is placed on cage, go-cart (1) is by motor or hydraulic oil cylinder driving, advance or retreat along the horizontal guide rail of cage, with gear, tooth bar or sprocket wheel, chain guarantee go-cart two side wheels synchronously.At the front end of every layer of supporting plate (2) the aluminium jaw (7) that a row is installed in the activity on the little axle is housed, above the carriage of cage, the baffle plate (6) that can unidirectionally stir is housed.Be provided with a pair of by motor-driven rubber rollers in the porch of advancing grillage, the veneer to be dried that is placed on the hydraulic elevator platform successively is put on each layer supporting plate (2) of the cage that raises one by one by this to rubber rollers, when cage rose to highest order, each layer heating platen of each layer supporting plate and main frame was on the corresponding position.

Turnover plate process is seen Fig. 2, the first step (a), go-cart (1) is advanced, each layer supporting plate (2) that veneer to be dried (4) has been placed in drive advances, veneer holds up the unidirectional baffle plate that stirs (6), supporting plate (2) front end by the slightly sagging movable aluminium jaw (7) of deadweight, paste by the surface of the guiding angle iron (5) of heating platen (9) side and climb on the surface of heating platen (9), and push up dry veneer (8) reliably; In second step (b), when the go-cart right side entered, aluminium jaw (7) pushed up out the veneer of drying on the supporting plate (10) of grillage, and this moment, veneer (4) to be dried was in the top of heating platen; In the 3rd step (c), go-cart (1) retreats, and supporting plate (2) is being with veneer (4) to retreat, and veneer is run into baffle plate (6) and is parked on the heating platen, but deflection is advanced plate one side and failed placed in the middle; In the 4th step (d), when aluminium jaw (7) puts in place along with go-cart retreats, be in the left of baffle plate (6); The 5th step (e), go-cart is advanced for the second time, the side that does not enter the veneer (4) of heating platen by the slightly sagging aluminium jaw (7) of deadweight fork as yet enters on the heating platen (9) along heating platen triangle guiding iron (5) with firmlying, when veneer (4) between two parties after, dolly halt (by the travel switch sender); In the 6th step (f), dolly (1) retreats into original position.Just can carry out hot-pressing drying operation then, meanwhile, advance grillage material loading and go out the grillage discharging successively again, for next work cycle is prepared.

This machine is realized semi-automatic circulation by PLC electric-control system and hydraulic power unit.Dry of the same race, with the veneer of moisture content, this machine productivity ratio can reach 50% of four layers of roller drier that 14H+2C is as long as fifty meters, but equipment investment has only the latter's 10%.Dry with amount, of the same race, with the veneer of moisture content, power consumption is saved more than 85%, steam consumption is saved more than 60%.It is a kind of veneer drying equipment of significantly energy-conservation and investment-saving.

Claims (2)

1, the contact heating type veneer dryer is a kind of multi-daylight press, each layer of when filling with substance heating platen rests on the fixed stairstepping toe board, bigger spacing between holding plate, rising makes each layer heating platen successively closed by the underneath type oil cylinder, to being clipped in the heating of exerting pressure of moist veneer between the heating platen, each layer heating platen successively opened and got back on the fixed stairstepping toe board when oil cylinder descended, to accelerate steam discharge.This energy-saving veneer dryer is characterized in that also being provided with in the outside of every fixed stairstepping toe board (4) and is installed in hinge (6) and goes up the less moving stair shape toe board of jump that promotes by small oil tank (5).

2, energy-saving veneer dryer according to claim 1, the turnover grillage is the elevator cage formula, its feature of advancing grillage is that the front end of every layer of supporting plate (2) of elevator cage is equipped with a row and is installed in movable aluminium jaw (7) on the little axle, slightly sagging by deadweight, in motion process, paste by the surface of triangle guiding iron (5) and heating platen (9), pushing away veneer and advancing.

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