CN101173880B

CN101173880B - Sampling device for salt density test of transmission line insulator

Info

Publication number: CN101173880B
Application number: CN2007101678642A
Authority: CN
Inventors: 康润田
Original assignee: BAOTOU LINFENG RARE EARTH CHEMICAL Co Ltd
Current assignee: BAOTOU LINFENG RARE EARTH CHEMICAL Co Ltd
Priority date: 2007-10-23
Filing date: 2007-10-23
Publication date: 2011-01-26
Anticipated expiration: 2027-10-23
Also published as: CN101173880A

Abstract

The invention relates to a salt density test sampling device, belonging to the technical field of an insulator fouling agent testing device of 110KV and over transmission line and transformer station , comprising testing pieces, an annular card of injection molding by high-strength plastics or compression molding and a plastic or hard rubber column bracket; the materials of the testing pieces respectively are the same with the material of a ceramic insulator and a silicone rubber composite insulator, two rectangular plastic frames are respectively arranged at both ends of the annular opening and testing pieces are respectively embedded on each rectangular plastic frame with two on each frame and the materials of the testing pieces are the same with the materials of the ceramic insulator and the silicone rubber composite insulator respectively; wherein, the column bracket is arranged at lower central section of the inner side surface of one of the rectangular plastic frame and one end of the column bracket is fixed and the other end can rotate up-and-down along the inner side face; the testing results are equal to the results of actually sampling from the ceramic (glass) insulators or silicone rubber composite insulators. The invention has the advantages that the device can be repeated use, long service life, low cost, labor saving, and applicability to salt density testing sampling in a large area.

Description

Sampling device for salt density test of transmission line insulator

One, technical field:

The invention belongs to 110KV and above transmission line of electricity and Substation Insulator dunghill proving installation technical field.

Two, background technology:

High pressure or UHV (ultra-high voltage) (110KV and more than) transmission line of electricity and Substation Insulator adopt several pieces suspensions of series connection or pedestal pottery (or glass) insulator in the past usually, lead are maked somebody a mere figurehead, to reach insulation over the ground.Existing most of regional high pressure or extra high voltage network and transformer station all adopt silicon rubber synthetic insulators, so that guarantee electrified body safe insulation distance over the ground better.Because transmission line of electricity and transformer station are located in the open, insulator is very easily by pollutions such as airborne smog, dust, the filthy material that adheres to along with insulator surface gathers and increases, just can cause insulator creeping discharge (or crying the pollution flashover discharge), it is very harmful that this electric discharge phenomena cause, can cause large area blackout when serious, cause serious harm and massive losses for industrial and agricultural production and national defence, communication and resident's daily life, power supply department is in order to guarantee safe power supply, stop the generation of this type of accident, taked several different methods and various measure, as:

1, reinforcement is to the cleaning of insulator; 2, pottery (or glass) insulator is regularly replaced; 3, adjust the insulator creep distance; 4, large tracts of land is replaced by silicon rubber synthetic insulators.

Formulating cleaning insulator paragraph or change the insulator scope, generally all is that basis is carried out the close sample test results of the salt of insulator, and the close sampling and testing of salt is a basic skills of measuring the electric transmission line isolator gradation for surface pollution.

So-called equivalent salt density test, exactly the dunghill density of insulator surface is converted, the dunghill weight (be equivalent to every square centimeter and be how many milligrams) that is converted on the per surface area is represented, this is the basic skills of the widely used expression insulator of present electric system pollution level, is transmission line of electricity and transformer station are selected dielectric level and the foundation of carrying out insulation control, maintenance.Its concrete operation method is exactly that (the 110KV circuit is with 8 insulators for whole string pottery (or glass) insulator from a certain transmission line of electricity, the 220KV circuit is with 16 insulators, the 500KV circuit is with 28 insulators) on take off three to five insulators, then with a certain amount of distilled water respectively to the dunghill of every insulator surface clean disappear molten, then salt density test instrument probe is inserted and be dissolved with in the distilled water of dunghill, after treating the stable reading of salt density test instrument demonstration, choose the indication reading and calculate according to formula, the close value of salt of each unit skirt section of being tested added up average, this mean value is exactly the close value of salt of bunch of insulator, this is a basic skills of measuring porcelain insulator or the close value of glass insulation alite, there is the shortcoming of not only time-consuming but also effort in this measuring method, is not suitable for carrying out on a large scale; If measure the close value of salt of silicon rubber synthetic insulators, that will take off whole insulator, and three to five that clean are wherein dodged skirt, and the concrete operations step of back is the same.Measure by above method, every insulator need consume distilled water 300ml, measure a basic shaft tower need with five to eight artificial, and the instrument that need carry is many, measurement can't be carried out on the spot.The comparison difficulty is complicated because this method operates, for this reason, method after improving is to carry out stimulated replacement at shaft tower overhead extension a string pottery (or glass) insulator or silicon rubber synthetic insulators, utilize said method to test then, test result is converted, replace on pottery (or glass) insulator from the transmission line of electricity direct sample to test the result who draws with this, because empty pottery (or glass) insulator of hanging or silicon rubber synthetic insulators are away from charged lead, residing electric field a little less than, the dunghill amount of absorption just can be not the same with actual conditions, so the close value of salt that tests out with it is just not too accurate.

Three, summary of the invention:

The purpose of this invention is to provide that a kind of long service life, cost of manufacture are low, simple to operate easily, labor and material saving, result salt density test sampler and method, i.e. test pieces salt density test sampler and method accurately.

The present invention is mainly by the plastic annular card of an opening, two rectangular plastic frames, two ceramic test sheets and two silicon rubber test pieces, a cylindrical stent is formed, the material with porcelain insulator and silicon rubber synthetic insulators is identical respectively with the silicon rubber test pieces for the ceramic test sheet, a rectangular plastic frame is respectively installed at the two ends of annular snap opening part, two rectangular plastic frames and annular snap plane are perpendicular and be parallel to each other, inlay a ceramic test sheet and a silicon rubber test pieces on each rectangular plastic frame, the middle part that plastic support is placed in one of them frame of plastic is the position on the lower side, the one end is fixed, the other end is rotary moveable up and down, and test sampler shape as shown in drawings.Sampling is stuck in it on insulator of transmission line of electricity with power tool during operation, generally can work once a personal insulating bar, and it is all very convenient to install or remove.Because test pieces area little (having only 10～30 square centimeters/sheet), therefore clean hourly water consumption also seldom, one group of (two) test pieces water consumption has only 140ml, and there and then just can be measured, provide convenience for carrying out this work on a large scale, also lay a good foundation for measuring gray density from now on, the degree of aging to accurate judgement insulator has accumulated data that in a large number can be for reference simultaneously.

Be equivalent to the test result of pottery (or glass) insulator or the actual sampling of silicon rubber insulator with the result of test pieces sampling and measuring, because it is to be attached on the insulator, material therefor and insulator are again equivalent material, residing environment is also identical, so it is the same with the contamination of insulator on per surface area.Though the area of test pieces is less, but do not influence the accuracy of measurement result, and after current measurement finishes, test pieces can also be reinstalled, continue to use, this test pieces can be used repeatedly, so this device is cheap, recruitment is very few, is suitable for the large tracts of land installation and carries out salt density test sampling work.

Four. description of drawings:

Fig. 1 is the front schematic view of salt density test sampler;

Fig. 2 is the side schematic view of salt density test sampler;

Fig. 3 is the schematic top plan view of salt density test sampler;

1--silicon rubber test pieces, 2--pottery (or glass) test pieces, 3--plastic annular card, 4--cylindrical stent among the figure.

Five, embodiment:

At first, with the annular snap 3 that high strength plastics is made (injection moulding or extrusion modling) opening, the transversal section of plastic annular card 3 can be rectangle, ellipse or other shape; Be connected with two rectangular plastic frames at plastic annular card 3 two ends, two rectangular plastic frames are parallel and perpendicular with the plane of plastic annular card 3, each inlays a slice silicon rubber test pieces 1 and a slice pottery (or glass) test pieces 2 side by side each rectangular plastic frame, settle the cylindrical stent 4 of plastics or rubberite material therein on rectangular plastic frame, one end of cylindrical stent 4 is fixed on this position on the lower side, rectangular plastic frame middle part promptly between the two built-in testing sheets with bearing pin, the other end can center on stiff end rotary moveable up and down between the plane relative with another rectangular plastic frame, so just form a salt density test sampler.During installation exercise, support two rectangular plastic frames at plastic annular card 3 two ends, (when under the charged situation of transmission line of electricity, installing or removing operation, should use special-purpose charged insulating bar with cylindrical stent 4.) then, the middle part of the plastic annular card 3 of this salt density test sampler is stuck in the hook end of control lever, hold the other end of control lever, push the opening part of plastic annular card 3 to insulator and dodge the position, skirt section, insulator dodges skirt cylindrical stent 4 tops of salt density test sampler is fallen, under elastic reaction, plastic annular card 3 just tightly is stuck in insulator and dodges on the skirt.When needs are tested, live the middle part of plastic annular card 3 with charged insulating bar hook end hook, outwards pull out then, take off silicon rubber test pieces 1 and pottery (or glass) test pieces 2 to ground, respectively the dunghill on two ceramic test sheets 2 or two silicon rubber test pieces 1 surfaces is cleaned disappear molten (also can clean every built-in testing sheet separately with 70ml distilled water) with 140ml distilled water, dirt water under cleaning is poured in the measuring cup, then salt density test instrument probe is inserted in the measuring cup and be dissolved with in the distilled water of dunghill, after treating the stable reading of salt density test instrument demonstration, choose the indication reading and calculate according to formula, the close value of salt of the test pieces that test is calculated is added up and is averaged, and this mean value is exactly and the close value of the salt of this insulator string equivalence.Convert by the close value result of salt that two kinds of test pieces on the same set of sampler are obtained respectively, just can understand replacing time and the cycle of grasping two kinds of insulators.

Claims

1. sampling device for salt density test of transmission line insulator, it is mainly by the plastic annular card of an opening, two rectangular plastic frames, two ceramic test sheets, two silicon rubber test pieces and a cylindrical stent are formed, the material with porcelain insulator and silicon rubber synthetic insulators is identical respectively with the silicon rubber test pieces to it is characterized in that the ceramic test sheet, the plastic annular card is by high strength plastics injection moulding or extrusion modling, a rectangular plastic frame is respectively installed at the two ends of plastic annular card opening part, two rectangular plastic frame planes and plastic annular card plane is perpendicular and two rectangular plastic frame planes are parallel to each other again, each inlays a slice ceramic test sheet and a slice silicon rubber test pieces side by side on each rectangular plastic frame, the middle part of one of them rectangular plastic frame position on the lower side promptly is equipped with a cylindrical stent between the two built-in testing sheets, the cylindrical stent material is plastics or rubberite, and the one end is fixed, the other end is rotary moveable up and down.

2. a kind of sampling device for salt density test of transmission line insulator according to claim 1, when it is characterized in that carrying out the sampling of salt density test, described salt density test sampler is installed earlier, installation method is the hook end with control lever, push the opening part along continuous straight runs of plastic annular card to insulator and dodge the position, skirt section, utilize insulator sudden strain of a muscle skirt that the cylindrical stent of this device is pushed over, under elastic reaction, make plastic annular card inwall tightly be stuck in insulator and dodge on the skirt; When needs take off described salt density test sampler, with the hook end of control lever the plastic annular card is laterally outwards pulled out equally, take off silicon rubber test pieces and ceramic test sheet then, with a certain amount of distilled water respectively to the dunghill on test pieces surface clean disappear molten, dirt water under cleaning is poured in the measuring cup, with salt density test instrument the distilled water that contains dunghill under cleaning is tested again, calculated according to formula again, obtain a result.