CN103456428A - Pressing connection immersion bell-shaped disc-shaped suspension type composite insulator chain element - Google Patents
Pressing connection immersion bell-shaped disc-shaped suspension type composite insulator chain element Download PDFInfo
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- CN103456428A CN103456428A CN2013100066930A CN201310006693A CN103456428A CN 103456428 A CN103456428 A CN 103456428A CN 2013100066930 A CN2013100066930 A CN 2013100066930A CN 201310006693 A CN201310006693 A CN 201310006693A CN 103456428 A CN103456428 A CN 103456428A
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Abstract
The invention discloses a pressing connection immersion bell-shaped disc-shaped suspension type composite insulator chain element which comprises a core stick, armour clamps arranged at the two ends of the core stick and a protecting sleeve arranged at the outer side of the core stick in a covering mode. The protecting sleeve comprises a sealing structure formed by high-temperature solidification, and an umbrella skirt is arranged on the protecting sleeve. The armour clamps are connected to the core stick in a pressing mode, and the sealing structure is formed on the outer surfaces of the armour clamps in a high-temperature solidifying mode. The umbrella skirt comprises an immersion bell-shaped body extending along the periphery of the protecting sleeve, and a plurality of prismatic protrusions are formed on the inner wall of the immersion bell-shaped body. The pressing connection immersion bell-shaped disc-shaped suspension type composite insulator chain element can prevent bird hazards, resist to wind and sand, resist to damage caused by external force and has the function of assisting climbing and stepping.
Description
Technical field
The present invention relates to a kind of composite insulator, relate in particular to a kind of compression joint type bell shape disc suspension composite insulator string element.
Background technology
Composite insulator because of it in weight, survey null value, anti-pollution flashover voltage, do not reveal etc. that porcelain is compared in aspect, glass insulator has an enormous advantage and is subject to the favor of industry, high these characteristics of pollution flashover voltage especially.Research is found, has certain relation between the umbrella skirt construction of insulator and pollution flashover voltage, makes identical but its pollution flashover voltage difference of composite insulator that umbrella skirt construction is different of other conditions.
The umbrella footpath is as follows on the impact of composite insulator Flashover Characteristics: the umbrella footpath is strengthened, the equivalent diameter of composite insulator increases, Flashover Characteristics is had to negative influence, although the corresponding increase of the creepage distance of composite insulator, can improve pollution flashover voltage to a certain extent, but the degree improved is limited, causes on the contrary the utilance relative reduce of creepage distance, and excessive umbrella footpath can consume too much material, does not have economic benefit; Therefore the too small deficiency that can cause leakage distance in umbrella footpath, select the First Principles in umbrella footpath to be, selects the umbrella footpath with economic benefit guaranteeing that whole insulator meets under the prerequisite of leakage distance.
The umbrella spacing is as follows on the impact of composite insulator Flashover Characteristics: the umbrella spacing increases, and at first can improve the contamination accumulation characteristics of composite insulator; Secondly, can effectively suppress bridge joint between umbrella, prevent the serial connection of serious icing snowberg and retardance electric arc; The 3rd, can promote the utilance of creepage distance; But the prerequisite increased is to guarantee that whole composite insulator has sufficient creepage distance.The umbrella spacing reduces, in the situation that the certain creepage distance that can improve composite insulator of insulation height, but pollution flashover voltage is the linear growth with the increase of creepage distance not, the umbrella spacing is too small, especially to the bell shape product of prismatic is set under umbrella, bridge joint, the utilance relative reduce of creepage distance easily occur between umbrella.
Composite insulator operation geographic range is wide, and different regions have its geographical particularity, thereby cause the operating condition complexity, and there is extraneous uncertain factor in composite insulator, thereby affects the safe operation of composite insulator in transportation, I&M process simultaneously.
Summary of the invention
The object of the present invention is to provide a kind of anti-bird pest, anti-blown sand, external force resistance destroy and can assist and climb the compression joint type bell shape disc suspension composite insulator string element of stepping on.
For achieving the above object, the embodiment of the present invention has proposed a kind of compression joint type bell shape disc suspension composite insulator string element, comprise: plug 1, the gold utensil 2 that is arranged on plug 1 two ends and covering are arranged on the sheath 4 in plug 1 outside, wherein said sheath 4 comprises the hermetically-sealed construction 5 of hot setting moulding, and the full skirt 3 of bell shape is arranged on described sheath 4; Wherein said gold utensil 2 is crimped on plug 1, and described hermetically-sealed construction 5 hot settings are molded on the outer surface of described gold utensil 2; Inwall at described full skirt 3 is provided with a plurality of prismatic 31.
Further, the top rade of described full skirt 3 is 4 °～16 °.
Further, the umbrella of described full skirt 3 stretches out for 80mm～200mm, and the nominal disk track is 150mm～500mm.
Further, under the rib of described prismatic 31, coefficient is 0.7～1.1.
Further, described a plurality of prismatic 31 are parallel to each other, and extending axially along described plug 1.
Further, the material of full skirt 3 sheaths 4 adopts outdoor type hydrophobicity cycloaliphatic epoxy resin.
Further, plug 1 adopts compression joint technique with being connected of gold utensil 2.
Compared to existing technology, the beneficial effect of a kind of compression joint type bell shape disc suspension composite insulator string element of the present invention is as follows:
(1) pass through the bell shape beveled structure: the reasonable setting of coefficient under unit height creepage distance, moulding coefficient and rib, and the simulation analysis of contamination accumulation characteristics, reach the effect of composite insulator Flashover Characteristics the best, improved the pollution flashover voltage of cap and pin insulator string element series products;
(2) umbrella cover of compression joint type bell shape disc suspension composite insulator string element adopts HCEP(Hydrophobic Cycloaliphatic Epoxy: the hydrophobicity alicyclic epoxide compound) material passes through high-temperature, high pressure, descends hot setting forming seal structure for a long time on the gold utensil outer surface, realized the high-intensity sealing of composite insulator, prevented that composite insulator from Fragile Split in use occurring;
(3) compression joint type bell shape disc suspension composite insulator string element has good hydrophobicity, migration of hydrophobicity and electric property with the HCEP material, there is higher mechanical strength simultaneously, thereby make disc suspension composite insulator series of products of the present invention thering is when good hydrophobicity, migration of hydrophobicity and resistant are dodged performance the anti-blown sand ability that has improved composite insulator, the ability that external force resistance destroys, can prevent the destruction of unfirmly closing to composite insulator.Can trample on full skirt within the specific limits in case of necessity in engineering staff's work progress, thereby facilitate construction, improve the coefficient of safety in engineering staff's work progress.Simultaneously product has does not need to survey null value, the advantage such as does not reveal, thereby reduces maintenance cost;
(4) compression joint type bell shape disc suspension composite insulator string component structure mode is designed to the disk-shaped structure mode, product is equal to size and the electromechanical properties with tonne disk-shaped suspension porcelain or glass insulator, facilitate the transportation under the difficult operating mode of transportation, make combination type selecting, installation, maintenance and the transportation of product more quick and convenient simultaneously.
The accompanying drawing explanation
The structural representation that Fig. 1 is compression joint type bell shape disc suspension composite insulator string element of the present invention;
The partial enlarged drawing that Fig. 2 is A place in Fig. 1.
Embodiment
In order better to understand purpose of the present invention, structure and function, below in conjunction with accompanying drawing, a kind of compression joint type bell shape disc suspension composite insulator string element of the present invention is done to further detailed description.
As depicted in figs. 1 and 2, compression joint type bell shape disc suspension composite insulator string element of the present invention, plug 1, the gold utensil 2 that is arranged on plug 1 two ends and covering are arranged on the sheath 4 in plug 1 outside, wherein said sheath 4 comprises the hermetically-sealed construction 5 of hot setting moulding, and the full skirt 3 of bell shape is arranged on described sheath 4; Wherein, described gold utensil 2 is crimped on plug 1, and described hermetically-sealed construction 5 hot settings are molded on the outer surface of described gold utensil 2; The inwall of wherein said full skirt 3 is provided with a plurality of prismatic 31.
Wherein, as shown in Figure 1, bell shape refers to a U font with certain-length sidewall.
Wherein, gold utensil overall dimension structure can need to be converted according to installing and using.
Wherein, the top rade of the bell shape full skirt 3 on described sheath 4 is 4 °～16 °.The umbrella of full skirt 3 stretches out for 80mm～200mm, and the nominal disk track is 150mm～500mm.Wherein, umbrella stretches out the radial distance referred between composite insulator umbrella skirt outer and sheath.Under the rib of described full skirt 3, coefficient is 0.7～1.1.
As shown in Figure 1, described a plurality of prismatic 31 are parallel to each other, and extending axially along described plug 1.
Umbrella cover in the present invention preferably adopts HCEP(Hydrophobic Cycloaliphatic Epoxy: the hydrophobicity alicyclic epoxide compound) material, thereby make disc suspension composite insulator string element of the present invention when thering is good hydrophobicity, migration of hydrophobicity and electric property, the anti-blown sand ability of composite insulator, the ability that external force resistance destroys have been improved, can prevent the destruction of unfirmly closing to the composite insulator umbrella cover, and make within the specific limits composite insulator have can to assist to climb to step on performance, improved the coefficient of safety in the work progress.And the hermetically-sealed construction that (is specially on the outer surface of gold utensil) the hot setting moulding between umbrella cover and gold utensil also can adopt the HCEP material, to realize the high-intensity sealing of composite insulator.
In addition, compression joint type bell shape disc suspension composite insulator string element of the present invention moves on the line, the long term of dynamo-electric load will be subject to, the mechanical strength of composite insulator is passed in time and is reduced, the main cause that causes this phenomenon is that mandrel material itself has creep properties, if in the process of crimping simultaneously, parameter designing is unreasonable, causes the crimping district stress between gold utensil and plug too concentrated, under the long-term load effect, the insulator mechanical strength decrease speed can be accelerated.In GB/T 19519 appendix A composite insulator mechanical stretching load-time test principle, with insulator strength-time graph, the creep decay of composite insulator is stipulated: the attenuation curve slope must not surpass 8%.
For guaranteeing the Mechanical Reliability of composite insulator product, the present invention strives the creep characteristic curve slope of composite insulator is dropped to 4%, make insulator strength corresponding to different end metal fitting crimp strength-time graph slope by lot of experiments, and find out-time graph slope corresponding crimping parameter while being 4%.
The mechanical strength of composite insulator can be made by 3 time point failure tests with the logarithmic relationship slope of a curve of load application time: the average failing load of 1min, the average failing load of 24h, the average failing load of 96h.In process of the test, the 1min failing load is easy to record, and the failing load of 24h and 96h is difficult for recording.Therefore the failing load of 24h and 96h is made and changed, the test of the failing load of 24h and 96h is changed into to 24h and 96h resistance test, as long as composite insulator can cross tolerance 0.74Mav and 0.73Mav(slope of a curve be no more than per time logarithmic scale 4%) 24h and 96h, so just think that the creep characteristic curve slope is 4% to the maximum, the composite insulator product has higher Mechanical Reliability.
1min failing load test: adopt 3 same compound insulators to carry out the failing load test, obtain average destruction value Mav and standard deviation б.Be not less than 10 according to international experience when testing number, can calculate more accurate standard deviation б as test data, if the test number is 3, the standard deviation б as test data gets 0.08Mav.
24h and 96h resistance test: the resistance test for 24h still adopts 3 composite insulators, requirement according to creep characteristic curve slope 4%, draw the 24h logarithm failing load value M24 of correspondence constantly, as long as composite insulator can bear the tensile load 24h of M24, just can think that the creep characteristic curve slope of composite insulator is at least 4%.
T24=Lg（24×60）=3.16
M24=（1-3.16×0.04）Mav=0.87Mav
According to the Gaussian Profile principle, the 24h resistance test load that 3 composite insulators are 90% by probability is:
0.87Mav（1-1.82×0.08）=0.74Mav
For the 96h resistance test, in like manner can show that the 96h resistance test load that 3 composite insulator percent of pass are 90% is:
T96=Lg（96×60）=3.76
M24=（1-3.76×0.04）Mav=0.85Mav
0.85Mav（1-1.82×0.08）=0.73Mav
Just can draw by these three somes the creep characteristic curve that slope is 4% composite insulator to the maximum, and the end metal fitting crimping parameter of the composite insulator of corresponding this curve is exactly desirable crimping parameter.
Under the crimping parameter of 4% attenuation slope, the 24h resistance test that 3 same compound insulators carry out 1.2SML is produced in crimping:
24h time logarithmic scale is:
T24=Lg（24×60）=3.16
50 year logarithmic scales are:
T24=Lg（50×365×24×60）=7.42
If the tolerance 1.2SML of 24h, with 4% attenuation slope, after 50 years, the mechanical load of composite insulator product is:
1.2SML[1-(7.42-3.16)?×0.04]=1SML
Known with 4% attenuation slope, after 50 years, the composite insulator product also at least has the tensile load value of specified mechanical load.
1.2SML after tolerance 24h, product is carried out to the mechanical stretching failure test, can proved.
Compression joint type bell shape disc suspension composite insulator string element of the present invention can be determined the crimping parameter according to the method.
In sum, a kind of resistant of the present invention dodges, prevents that the compression joint type bell shape disc suspension composite insulator string element of unfirmly closing, anti-blown sand passes through beveled structure: the reasonable setting of coefficient under unit height creepage distance, moulding coefficient and rib, utilize the simulation analysis of contamination accumulation characteristics to calculate simultaneously, optimize umbrella skirt construction, obtain the effect of Flashover Characteristics the best.
By sheath high-temperature, high pressure, the long-time curing molding hermetically-sealed construction of HCEP material on the gold utensil outer surface, realized the high-intensity sealing of composite insulator, prevent that composite insulator from Fragile Split in use occurring; Umbrella cover has good hydrophobicity, migration of hydrophobicity and electric property with the HCEP material, there is higher mechanical strength simultaneously, thereby disc suspension composite insulator series of products of the present invention have improved the anti-blown sand ability of composite insulator, the ability that external force resistance destroys when having good hydrophobicity, migration of hydrophobicity and electric property, can prevent the destruction of unfirmly closing to the composite insulator umbrella cover, and make within the specific limits composite insulator have can to assist to climb to step on performance, facilitate engineering staff's construction, improved the coefficient of safety in the work progress; And determine the crimping parameter of gold utensil and plug by a kind of round-about way, make it meet the requirement of creep characteristic curve slope.By compression joint type bell shape disc suspension composite insulator string component structure mode is designed to the disk-shaped structure mode, product is equal to size and the performance with tonne disk-shaped suspension porcelain or glass insulator, facilitate the transportation under the difficult operating mode of transportation, make combination type selecting, installation, maintenance and the transportation of product more quick and convenient simultaneously.Thereby meet high pressure, superhigh pressure and extra-high voltage grid; The user demand of electric railway and high-speed electric railway and railway traffic contact network.
Abovely by specific embodiment, the present invention is further described; but it should be understood that; here concrete description; should not be construed as the restriction to the spirit and scope of the invention; the one of ordinary skilled in the art, reading the various modifications of after this specification, above-described embodiment being made, belongs to the scope that the present invention protects.
Claims (7)
1. a compression joint type bell shape disc suspension composite insulator string element, it is characterized in that, comprise: plug (1), the gold utensil (2) that is arranged on plug (1) two ends and covering are arranged on the sheath (4) in plug (1) outside, wherein said sheath (4) comprises the hermetically-sealed construction (5) of hot setting moulding, and the full skirt of bell shape (3) is arranged on described sheath (4); It is upper that wherein said gold utensil (2) is crimped on plug (1), and described hermetically-sealed construction (5) hot setting is molded on the outer surface of described gold utensil (2); The inwall of wherein said full skirt (3) is provided with a plurality of prismatic (31).
2. compression joint type bell shape disc suspension composite insulator string element according to claim 1, is characterized in that, the top rade of described full skirt (3) is 4 °～16 °.
3. compression joint type bell shape disc suspension composite insulator string element according to claim 1, is characterized in that, the umbrella of described full skirt (3) stretches out for 80mm～200mm, and the nominal disk track is 150mm～500mm.
4. compression joint type bell shape disc suspension composite insulator string element according to claim 1, is characterized in that, described a plurality of prismatic (31) are parallel to each other, and extending axially along described plug (1).
5. compression joint type bell shape disc suspension composite insulator string element according to claim 1, is characterized in that, under the rib of described prismatic (31), coefficient is 0.7～1.1.
6. compression joint type bell shape disc suspension composite insulator string element according to claim 1, is characterized in that, the material of full skirt (3) sheath (4) adopts outdoor type hydrophobicity cycloaliphatic epoxy resin.
7. compression joint type bell shape disc suspension composite insulator string element according to claim 1, is characterized in that, plug (1) adopts compression joint technique with being connected of gold utensil (2).
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Citations (6)
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|---|---|---|---|---|
| EP0388133A2 (en) * | 1989-03-17 | 1990-09-19 | Ngk Insulators, Ltd. | Suspension insulator |
| EP1276118A2 (en) * | 2001-07-12 | 2003-01-15 | Ngk Insulators, Ltd. | Insulator and insulator apparatus |
| CN101114538A (en) * | 2007-06-21 | 2008-01-30 | 丁清 | Combined insulator |
| CN201540784U (en) * | 2009-09-07 | 2010-08-04 | 田季春 | Low-pressure drawing wire composite insulator device |
| CN102592754A (en) * | 2012-03-20 | 2012-07-18 | 黑河电业局 | Composite disk-type insulator |
| CN203026280U (en) * | 2013-01-09 | 2013-06-26 | 河北荣森电气有限公司 | Press-connected bell jar type disc suspension composite insulator string component |
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2013
- 2013-01-09 CN CN2013100066930A patent/CN103456428A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0388133A2 (en) * | 1989-03-17 | 1990-09-19 | Ngk Insulators, Ltd. | Suspension insulator |
| EP1276118A2 (en) * | 2001-07-12 | 2003-01-15 | Ngk Insulators, Ltd. | Insulator and insulator apparatus |
| CN101114538A (en) * | 2007-06-21 | 2008-01-30 | 丁清 | Combined insulator |
| CN201540784U (en) * | 2009-09-07 | 2010-08-04 | 田季春 | Low-pressure drawing wire composite insulator device |
| CN102592754A (en) * | 2012-03-20 | 2012-07-18 | 黑河电业局 | Composite disk-type insulator |
| CN203026280U (en) * | 2013-01-09 | 2013-06-26 | 河北荣森电气有限公司 | Press-connected bell jar type disc suspension composite insulator string component |
Non-Patent Citations (3)
| Title |
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| 张秀敏,张晓东: "高压户外复合绝缘子外绝缘材料的研究与应用进展", 《绝缘材料》 * |
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Application publication date: 20131218 |