CN1058935C

CN1058935C - Composite insulating board and its producing technique

Info

Publication number: CN1058935C
Application number: CN97105022A
Authority: CN
Inventors: 矫国康; 佟达勋; 李树军; 孟凡利
Original assignee: ELECTRICAL LAMINATED WOOD PLANT WEIHE BUREAU OF FORESTRY
Current assignee: ELECTRICAL LAMINATED WOOD PLANT WEIHE BUREAU OF FORESTRY
Priority date: 1997-01-08
Filing date: 1997-01-08
Publication date: 2000-11-29
Anticipated expiration: 2017-01-08
Also published as: CN1187417A

Abstract

The present invention relates to a composite insulating board and a producing technique thereof. The composite insulating board has the characteristics that material with good quality is adopted, soaked, removed in tree bark and rotated into single boards with 0.5 to 3 millimeters; the material is dried and repaired into standard single boards; the single boards, an insulating paper board, asbestos cloth and dipping paper are spread with glue, placed for long and assembled into blanks; when the blanks are assembled, the single boards in the same layer and composite insulating material form layer boards in any mode, such as overlap joint, butt joint, oblique joint, splicing, etc.; each layer board is placed in any direction; the board blanks enter a hot press; the board blanks are firstly prepressed and pressed thermally; after being cooled, the board blanks are discharged out of a vehicle for producing the composite insulating board. Insulating members of a transformer and a mutual inductor, which are made by the board, reduce the cost, reduce internal consumption and have large economical and social benefits.

Description

Composite insulating board and production technology thereof

The present invention belongs to the material and the production method of making transformer, instrument transformer insulation system spare.

The material that the present insulation system member of making transformer, instrument transformer is used, its dielectric loss height, breadth is little, and electric, mechanical performance is disperseed, and is difficult for processing, and has problems such as seriously polluted.

The objective of the invention is to propose a kind of composite insulating board and production technology thereof, alternative epoxy resin bonded fiber, epoxy, phenolic aldehyde cardboard, electrical laminated plank, the insulating part of making transformer, instrument transformer makes its operation safety and reliability, reduce loss, reduce production costs.

Composite insulating materials such as the good Wooden veneer of employing of the present invention and transformer oil compatibility, insulating board, asbestos cloth, glass cloth, impregnated paper are coated with the low dielectric loss dielectric adhesive, make composite insulating board through assembly hot pressing; Wherein composite insulating board is characterised in that: veneer, insulating board, asbestos cloth, glass cloth, impregnated paper that the log that soaks through processing is made, through gluing, display, assembly, during assembly, the mode that veneer, insulating board, asbestos cloth, glass cloth, impregnated paper with layer can splice by a, b connects at interval, c butt joint, d mitered, e overlap is formed laminate, as Fig. 2, put by any angular orientation between each laminate,, form composite insulating board through gluing, pressurization as Fig. 1; The production technology of composite insulating board, it is characterized in that: (1) selects for use log to be processed into the juggle of surplus in accordance with regulations, juggle is put into clear water reserviors soak, and soaks 48-72 hour in 20 ℃-40 ℃ water temperature for the first time, after bleeding off water, water filling was soaked 24-48 hour in 60 ℃ of-80 ℃ of water more again; (2) after juggle goes out the pond, remove bark, be peeled into 0.5-3.0 millimeters thick veneer, veneer is placed the drying machine inner drying, its water content is controlled at below 8%, removes the defective on the veneer, repairs and makes the specification veneer; What (3) process carries out gluing, displays according to plate, insulating board, asbestos cloth, glass cloth, impregnated paper, assembly again, during assembly, with layer a veneer, insulating board, asbestos cloth, glass cloth, impregnated paper can splice by a, b connects at interval, c butt joint, d mitered, e overlap joint any-mode composition laminate, each laminate can be put by any angular orientation; (4) slab steadily enters in the hot press, first precompressed, and hot repressing, hot pressing pressure 4-10MPa, temperature 80-140 ℃, kept 1-24 hour, be cooled to the room temperature end-dump car after the hot pressing, produce composite insulating board.

The material that the present invention selects for use, log are to select that to contain oil little for use, do not pollute transformer oil, are convenient to gluing and dipping, the mechanical strength height, and the log of good electric property is made veneer, and veneer can not have any defective, must repair sometimes; Compound employing long fiber material is as insulating board, asbestos cloth, glass cloth, impregnated paper; Adhesive: good electric property, dielectric loss is low, the bonding strength height, after not producing each material gluing of moisture content and bubble during curing, display, assembly, combination with one deck or the various material of each layer when assembly is not subjected to any restriction, can be by the mode of Fig. 2 such as overlap joint, mitered, butt joint, connect at interval, connecting method forms; Can adopt the mode of Fig. 1 between each layer,, promptly between 0-360 °, can select for use any direction to put by the folded pendulum of any angular orientation; When compacting, slab steadily enters in the hot press, first precompressed, and hot repressing after hot pressing is finished, is cooled to the room temperature end-dump car again; The burr plate is processed into the specification product.

The present invention compared with prior art, following advantage is arranged: because this plate veneer, insulating board, asbestos cloth, glass cloth, impregnated paper carries out gluing and forms laminate, composite material can splice in each laminate, connect at interval, butt joint, mitered, overlapping mode, can any angular position put between each laminate, through precompressed, composite insulating board is made in hot repressing, this plate dielectric loss is low, breadth is big, and is electric, satisfactory mechanical property, and evenly, oil suction is good, easily processing, pollution-free, vacuumize is not ftractureed, the transformer that can be used for voltage levels, instrument transformer is made insulating component, reduce cost, reduce in-fighting, very big economic and social benefit is arranged.

Description of drawings:

Fig. 1 is each any putting position direction of plate schematic diagram layer by layer of the present invention;

Fig. 2 is the A-A profile of Fig. 1 of the present invention.

Embodiments of the invention:

Composite insulating board and production technology thereof are the veneers that adopts log to make, and with composite insulating material gluings such as insulating board, asbestos cloth, glass cloth, impregnated papers, process through assembly, hot pressing.

One, material choice:

1, log: it is few to contain oil, does not pollute transformer oil, is convenient to gluing and dipping, neutrality, mechanical strength height, good electric property;

2, the compound long fiber material of using: insulating board, asbestos cloth, glass cloth, impregnated paper;

3, adhesive: good electric property, the low dielectric loss dielectric adhesive that dielectric loss is low, bonding strength is high.

Two, production process:

1, the section of making: log, be processed into the juggle that contains rotary-cut surplus one fixed length on production equipment;

2, juggle soaks: carry out at twice: in the pond of 30 ℃ of water temperatures, soaked 50 hours for the first time; Change for the second time in the water that adds 65 ℃ behind the water again, soaked again 30 hours;

3, revolve the system veneer: the juggle after water treatment is gone out the pond, peel off bark, go up peeler again, revolve into the veneer of 1.5 millimeters thick through centering.

4, the veneer that is processed into is sent into and is carried out drying in the drying machine, and dried veneer moisture content is controlled at below 8%, and defectives such as the bark pocket on the veneer, bast excisions, to die for the sake of honour, small holes caused by worms, hole repair.

5, the insulating material of veneer of processing and choosing and compound usefulness is deposited by the specification warehouse-in;

6, gluing assembly, as required veneer, insulating board, asbestos cloth, glass cloth, impregnated paper are carried out gluing, through display, assembly, veneer, insulating material with layer during assembly can splice by a, b connects at interval, c butt joint, d mitered, e overlap joint any-mode composition laminate, can put by any direction position between each laminate;

7, compacting: slab steadily enters in the hot press, first precompressed, and hot repressing, hot pressing pressure is got 5MPa, and temperature is carried out under 90 ℃, and the retention time is 10 hours, is chilled to the room temperature end-dump car after the hot pressing, makes composite insulating board.

Claims

1, a kind of composite insulating board, comprise glass cloth, it is characterized in that: veneer, insulating board, asbestos cloth, glass cloth, impregnated paper that the log that soaks through processing is made, through display, assembly, veneer, insulating board, asbestos cloth, glass cloth, impregnated paper with layer during assembly can be formed laminate by the mode that overlap joint, butt joint, mitered, splicing, interval connect, put by any angular orientation between each laminate, form composite insulating board through gluing, pressurization.

2, the production technology of composite insulating board according to claim 1 comprises veneer, forms through hot pressing, it is characterized in that:

(1) select for use log to be processed into the juggle of surplus in accordance with regulations, juggle put into clear water reserviors soak, in 20 ℃-40 ℃ water temperature, soaked 48-72 hour for the first time, bleed off water after, water filling was soaked 24-48 hour in 60 ℃ of-80 ℃ of water more again;

(2) after juggle goes out the pond, remove bark, be peeled into 0.5-3.0 millimeters thick veneer, veneer is placed the drying machine inner drying, its veneer water content is controlled at below 8%, removes the defective on the veneer, repairs and makes the specification veneer;

(3) veneer that processes, insulating board, asbestos cloth, glass cloth, impregnated paper carry out gluing, display, assembly again, during assembly, can take over the meaning mode and form laminate by overlap joint, butt joint, mitered, splicing, interval with layer veneer, insulating board, asbestos cloth, glass cloth, impregnated paper, each laminate can be put by any angular orientation;

(4) slab steadily enters in the hot press, first precompressed, and hot repressing, hot pressing pressure 4-10MPa, temperature 80-140 ℃, kept 1-24 hour, be cooled to the room temperature end-dump car after the hot pressing, produce composite insulating board.