CN101859616A - Method for improving mechanical strength of insulation resin products - Google Patents
Method for improving mechanical strength of insulation resin products Download PDFInfo
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- CN101859616A CN101859616A CN200910049000A CN200910049000A CN101859616A CN 101859616 A CN101859616 A CN 101859616A CN 200910049000 A CN200910049000 A CN 200910049000A CN 200910049000 A CN200910049000 A CN 200910049000A CN 101859616 A CN101859616 A CN 101859616A
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- glass fiber
- fiber reticular
- reticular cloth
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Abstract
The invention discloses a method for improving mechanical strength of insulation resin products, which is mainly characterized in that: on the basis of the conventional insulation resin product, a layer or a plurality of layers of fiberglass gridding cloth are arranged inside the conventional insulation resin product; the fiberglass gridding cloth is prefabricated into a cylinder; the distance between the cylinder and an insert inside an insulator is respectively proportional to the tensile strength, the compression strength and the bending strength; the length of the cylinder is greater than the distance between inserts at the two ends in the insulation product and the cylinder is not exposed from the surface of the insulator; the diameter of the cylinder is greater than that of the inserts in the insulation product; two ends of the cylinder are sleeved on the outer sides of the two inserts in the insulator and the cylinder is partially overlapped with the two inserts; the proper distance between the fiberglass gridding cloth layers is also favorable for improving the mechanical strength of the insulation product; and the end parts of the inserts embedded in the resin are properly provided with grooves used for fixing the fiberglass and improving the tensile strength of the product. The method is suitable for improving the mechanical strength, reliability and stability of the insulation resin products formed by vacuum pouring, automatic pressure gel, injection and other modes.
Description
Technical field:
The present invention relates to a kind of method that increases the product mechanical strength, relate in particular to a kind of method that increases mechanical strength of insulation resin products.
Background technology:
It is solid-state that resin typically refers under the normal temperature, semisolid or liquid organic polymer, its kind is tired many, as thermosetting resin, it is build that its molecular structure solidifies the back, comprise phenolic resins, epoxy resin, amino resins, unsaturated polyester resin, polyurethane resin and silicon ether resin etc., as thermoplastic resin, its molecular structure is a line style, comprise: the PE-polyethylene, the PVC-polyvinyl chloride, the PS-polystyrene, the PA-polyamide, the POM-polyformaldehyde, the PC-Merlon, polyphenylene oxide and polysulfones etc. have good electric property, adhesive property, advantages such as solvent resistance; It is typically epoxy resin, be widely used at present the electric insulation product scope of various electric pressures, as be used for producing products such as insulator that equipment such as power switch are used for fixing, install, insulate, pull bar, require good insulation preformance, the mechanical strength height; Because of having anti-soil, thermosetting resin dodges advantages such as performance is good, electric erosion resistance is excellent, ageing resistace good, thermal endurance is high, pressurized is not yielding, in light weight, be widely used at present in the insulating products such as insulator, as China Patent No. be: 99239339.6 composite insulator, adopt epoxy resins insulation; But, insulative thermosetting resin product ubiquity the not high problem of mechanical strength, as in most of insulator product, it is not high to exist mechanical strength, easy to crack, problems such as cold-resistant thermal shock difference, can bear radially or axial stress less, and its intensity is subjected to the very big influence of variation of ambient temperature because of the reason of internal stress, even cause rupturing, cause power equipment to damage and the Circuits System fault, as in the insulated tension pole product, if the mechanical strength of pull bar is enough not high, the effect of perseveration makes that the insulated tension pole reliability is low even does not just reach designing requirement at all, when undercapacity when bearing the pulling force of operation, insulated tension pole will rupture in operating process; Yet, the superior function that the epoxy resins insulation product has, make that its development is a trend of insulating material field development, if and can design a kind of method that improves mechanical strength of insulation resin products, will bring very big opportunity for the development of insulating material, useful unsaturated-resin or epoxy resin glass enhancing material is made products such as insulator in the conventional method with mould pressing method, the product mechanical strength height such as insulator that this method is produced, but reduce because of the easy moisture absorption of glass causes the long-time stability of such insulating products, reliability, electric utility is used fewer and feweri; As seen, inventing a kind of method makes insulator, pull bar series products have performances such as high mechanical properties, high reliability, high stability to be very important.
Summary of the invention:
In order to solve the low problem of the mechanical performance of insulation resin products in the prior art, the invention provides a kind of method that increases mechanical strength of insulation resin products, be applicable to that the mechanical performance of insulation resin products in the power transmission and transforming equipments such as insulator, pull bar strengthens.
The objective of the invention is to realize by following technical scheme:
A kind of method that increases mechanical strength of insulation resin products, it is at original insulator, on the basis of insulating products such as insulated tension pole, portion increases one or more layers glass fiber reticular cloth within it, the distance setting of can arranging in pairs or groups arbitrarily between glass fiber reticular cloth layer and the layer, in advance glass fiber reticular cloth is made cylindrical shape, the length of glass fiber reticular cloth cylinder is greater than the distance between the metal insert at two ends in the insulating products, glass fiber reticular cloth cylinder maximum length is advisable with the outer surface that grid cloth is not exposed to insulator, the diameter of glass fiber reticular cloth cylinder is greater than the diameter of two ends metal insert, and glass grid cloth cylinder is concentric with the metal insert axle; The mesh of grid cloth, the glass thickness, the diameter of grid cloth cylinder, the grid cloth drum length, the tensile strength of the overlap length of grid cloth cylinder and metal insert and insulator or insulated tension pole, bending strength, compression strength are proportional, the inner position that two metal inserts are embedded in resin cured matter has one or more grooves, and the glass fiber reticular cloth cylinder can be fixed on groove, also can increase to stretch and bending strength.
Described glass fiber reticular cloth, with the alkali-free glass fiber grid cloth is base material, glass warp thread and glass weft yarn are orthogonal to fold and paste, glass warp thread and glass weft yarn are by being fixed together through compiling the binding of chemical fibre network yarn, have good alkali resistance, pliability and through broadwise high resistance pulling force, general mesh size is 2 * 2～5 * 5mm (according to the size of product, grid eye size can have bigger variation), tensile strength＞200N/mm
2, the breaking strain of glass fiber net (through, broadwise) should＜5.0%, and size and the tensile strength of mesh are inversely proportional to, and glass fiber reticular cloth also can be by other substituting mesh that insulate and do not react with resin.
In the process that insulating products is made, as requested glass fiber reticular cloth is made into cylindric, and be mounted in the die cavity, after resin vacuum pouring (VacuumCasting), pressure gel, automatic pressure gelation process (APG) or injection mode moulding such as (RIM).
The present invention can be used as the method for its mechanical strength of enhancing of resin type insulating products such as producing high strength insulator, insulated tension pole.
Because adopted above technical scheme, the present invention has following beneficial effect: 1, the mechanical strength of insulating products increases substantially, and has the high-intensity performances such as tension, resistance to compression, bending resistance and anti-shock resistance that comprise, is difficult for broken brittle failure.
2, the thermal shock performance of insulator, insulated tension pole series products greatly improves, and has ensured insulating products reliability, stability.
3, under prescribed strength, can dwindle small product size greatly, help the product miniaturization, save raw material.
4, manufacture method is simple, and implementation cost is low.
Description of drawings:
Fig. 1 is the structural representation of a specific embodiment of the present invention;
Fig. 2 is the structural representation of glass fiber reticular cloth;
Fig. 3 is prefabricated into the schematic diagram of cylinder for glass fiber reticular cloth.
Among the figure: 1 glass warp thread, 2 glass weft yarns, 3 inserts, 4 glass fiber reticular cloths, 5 resin insulator.
Embodiment:
The present invention is described in further detail below in conjunction with accompanying drawing:
With reference to accompanying drawing 1, it among the figure a kind of insulator that uses technical solution of the present invention, it has added two layers of glass fiber reticular cloth (4) on the basis of the inserts (3) of original structure and resin insulator (5), glass fiber reticular cloth (4) is prefabricated into cylinder, the length of glass fiber reticular cloth cylinder is greater than the distance between two metal inserts (3), the glass fiber reticular cloth cylinder is not exposed to resin insulator (5) outer surface, the diameter of glass fiber reticular cloth cylinder is greater than the diameter of two ends metal insert (3), keep certain spacing between glass fiber reticular cloth (5) and two metal inserts (3), this spacing and tensile strength are proportional, proportional with bending strength, proportional with compression strength, the end of two metal inserts (3) in the insulation position has two grooves, glass warp thread (1) or glass weft yarn (2) on the glass fiber reticular cloth can be fixed on groove, play the installation effect, and can increase the tensile strength of goods.
In the process that insulating products is made, technical scheme having thus described the invention, as requested glass fiber reticular cloth is made into cylindric, and be mounted on appropriate location in the die cavity, after resin vacuum pouring (Vacuum Casting), pressure gel, automatic pressure gelation process (APG) or injection mode moulding such as (RIM); Just adopted the correlated performance of the resinae insulating products of technical solution of the present invention to compare below:
(1) correlated performance that has used the insulator of technical solution of the present invention and existing product is example (seeing Table 1) with the insulator of Φ 65mm and h140mm relatively:
Table 1
(2) correlated performance that has used the tensile strength of two pull bar products of technical solution of the present invention and existing product relatively (seeing Table 2):
| Insulating products | Product 1 | |
| Existing pull bar | ??20KN | ??45KN |
| Pull bar after the enhancing | ??50-150KN | ??80-200KN |
Table 2
Because the present invention is basic identical for strengthening the main technical schemes that resinae insulating products mechanical strength adopted, so in this implementation example no longer one by one.
In order better to realize purpose of the present invention, the present invention is to the basic demand (seeing Table 3) of the main performance index of the glass fiber reticular cloth that adopted:
| Pilot project | Unit | Performance index |
| Mass area ratio | ??g/m 2 | ??≥120 |
| Anti-fracture strength (warp, broadwise) | ??N/mm 2 | ??≥500 |
| Pilot project | Unit | Performance index |
| The retention rate of anti-the ultimate strength | ??％ | ??≥50 |
| Breaking strain (warp, broadwise) | ??％ | ??≤5.0 |
Table 3
The present invention adopts in the inner method that increases one or more layers glass fiber reticular cloth of insulation resin products, makes mechanical performance of products be improved significantly, and impact resistance is good, be difficult for broken fracture, ensure the unobstructed of operation power, and the inventive method is simple, implements simple and reliable.
At last the explanation is: above embodiment only in order to the explanation the present invention and and unrestricted technical scheme described in the invention; Therefore, although this specification has been described in detail the present invention with reference to each above-mentioned embodiment,, those of ordinary skill in the art should be appreciated that still and can make amendment or be equal to replacement the present invention; And all do not break away from the technical scheme and the improvement thereof of the spirit and scope of the present invention, and it all should be encompassed in the claim scope of the present invention.
Claims (8)
1. method that increases mechanical strength of insulation resin products, it is on the basis of insulating products such as original insulator or insulated tension pole, portion increases one or more layers glass fiber reticular cloth within it, the distance setting of can arranging in pairs or groups arbitrarily as required between glass fiber reticular cloth layer and the layer, distance meets the electrical characteristic requirement between the metal insert at two ends, glass fiber reticular cloth is made the cylindrical shape of certain diameter in advance, the length requirement of glass fiber reticular cloth cylinder is greater than the distance between two metal inserts, the maximum length of glass fiber reticular cloth cylinder is not exposed to the insulation resin external surface with the grid cloth end and is advisable, the diameter of glass fiber reticular cloth cylinder is to be advisable greater than the diameter of two ends metal insert, keep certain spacing between glass fiber reticular cloth and two metal inserts, the end that the two ends metal insert is embedded in the resin insulator has one or more grooves, and the glass fiber reticular cloth cylinder is fixed in the groove.
2. a kind of method that increases insulative thermosetting resin product mechanical strength according to claim 1 is characterized in that: increase one or more layers glass fiber reticular cloth in the insulative thermosetting resin product.
3. glass fiber reticular cloth according to claim 2 is characterized in that: the glass fiber reticular cloth cylinder is axially concentric with the two ends metal insert.
4. a kind of method that increases insulative thermosetting resin product mechanical strength according to claim 1, it is characterized in that: glass fiber reticular cloth should change into the cylinder of certain diameter, the length requirement of glass fiber reticular cloth cylinder is greater than the distance between two metal inserts, the maximum length of glass fiber reticular cloth cylinder is not exposed to the insulation resin external surface with the grid cloth end and is advisable, and the diameter of glass fiber reticular cloth cylinder is to be advisable greater than the diameter of two ends metal insert.
5. a kind of method that increases insulative thermosetting resin product mechanical strength according to claim 1, it is characterized in that: the width of mesh of glass fiber reticular cloth, fibre bundle thickness, the diameter of glass fiber reticular cloth cylinder, length, the number of plies of glass fiber reticular cloth (tube) and the tensile strength of insulated product, compression strength, bending strength are distinguished proportional.
6. a kind of method that increases mechanical strength of insulation resin products according to claim 1 is characterized in that: open the intensity that one or more grooves fix glass fiber reticular cloth cylinder and increase and resin solidification body on two metal inserts.
7. a kind of method that increases insulative thermosetting resin product mechanical strength according to claim 1 is characterized in that: other substituting mesh that are suitable for of chemical reaction can not take place by insulation and with resin in glass fiber reticular cloth.
8. a kind of method that increases insulative thermosetting resin product mechanical strength according to claim 1 is characterized in that: the present invention is applicable to thermosetting resin or thermoplastic resin insulating products.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910049000 CN101859616B (en) | 2009-04-09 | 2009-04-09 | Method for improving mechanical strength of insulation resin products |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200910049000 CN101859616B (en) | 2009-04-09 | 2009-04-09 | Method for improving mechanical strength of insulation resin products |
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| Publication Number | Publication Date |
|---|---|
| CN101859616A true CN101859616A (en) | 2010-10-13 |
| CN101859616B CN101859616B (en) | 2013-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200910049000 Active - Reinstated CN101859616B (en) | 2009-04-09 | 2009-04-09 | Method for improving mechanical strength of insulation resin products |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102831991A (en) * | 2012-08-09 | 2012-12-19 | 河南平高电气股份有限公司 | Method for manufacturing epoxy-cast insulators |
| CN103456469A (en) * | 2013-01-09 | 2013-12-18 | 平顶山市普汇电气有限责任公司 | Secondary connection terminal for high-voltage current (voltage) transformer |
| CN109585212A (en) * | 2018-12-04 | 2019-04-05 | 杭州佰盟智能开关有限公司 | A kind of insulated pull rod of breaker |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06290790A (en) * | 1993-04-02 | 1994-10-18 | Meidensha Corp | Manufacture of current-collecting electrode for layer-built cell |
| CN2609166Y (en) * | 2003-04-17 | 2004-03-31 | 桐乡市天泽电气有限公司 | Insulating composite tube |
| CN2641774Y (en) * | 2003-09-09 | 2004-09-15 | 桐乡市天泽电气有限公司 | Leading-drawing insulation composite pipe |
| CN201021739Y (en) * | 2007-03-14 | 2008-02-13 | 吴发东 | Fiber enhanced plastic steel compound pipe |
-
2009
- 2009-04-09 CN CN 200910049000 patent/CN101859616B/en active Active - Reinstated
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06290790A (en) * | 1993-04-02 | 1994-10-18 | Meidensha Corp | Manufacture of current-collecting electrode for layer-built cell |
| CN2609166Y (en) * | 2003-04-17 | 2004-03-31 | 桐乡市天泽电气有限公司 | Insulating composite tube |
| CN2641774Y (en) * | 2003-09-09 | 2004-09-15 | 桐乡市天泽电气有限公司 | Leading-drawing insulation composite pipe |
| CN201021739Y (en) * | 2007-03-14 | 2008-02-13 | 吴发东 | Fiber enhanced plastic steel compound pipe |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102831991A (en) * | 2012-08-09 | 2012-12-19 | 河南平高电气股份有限公司 | Method for manufacturing epoxy-cast insulators |
| CN103456469A (en) * | 2013-01-09 | 2013-12-18 | 平顶山市普汇电气有限责任公司 | Secondary connection terminal for high-voltage current (voltage) transformer |
| CN109585212A (en) * | 2018-12-04 | 2019-04-05 | 杭州佰盟智能开关有限公司 | A kind of insulated pull rod of breaker |
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| Publication number | Publication date |
|---|---|
| CN101859616B (en) | 2013-12-18 |
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