CN203231874U - Oil-immersed transformer seal test instrument - Google Patents
Oil-immersed transformer seal test instrument Download PDFInfo
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- CN203231874U CN203231874U CN 201220708222 CN201220708222U CN203231874U CN 203231874 U CN203231874 U CN 203231874U CN 201220708222 CN201220708222 CN 201220708222 CN 201220708222 U CN201220708222 U CN 201220708222U CN 203231874 U CN203231874 U CN 203231874U
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- flow slow
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Abstract
The utility model discloses an oil-immersed transformer seal test instrument comprising a general tester and a pressure flow slow modulator; and the test instrument is characterized in that an air outlet of the pressure flow slow modulator is connected with an air inlet of the general tester. The pressure flow slow modulator is formed by a connector, an instrument sleeve, an instrument core, a spring, an end cap, an adjusting rod and an adjusting ring; the instrument core is provided with a diversion trench; an axial length of the diversion trench can ensure that a slit is formed opposite the connector after assembling is completed under a condition that no external air is let in, and the slit can ensure test air to enter or exit a test sample; the instrument sleeve is provided with the adjusting rod; the position of the adjusting rod can be set through axial motion of the adjusting ring; so the pressure flow slow modulator can optimally suit test conditions of different test samples.
Description
Technical field
The present invention relates to fluid constant voltage adjusted design and application thereof, specifically belong to the application of oil-filled transformer sealing test and equipment field, similar middle and high end thereof.
Background technology
Relevant industries have the testing equipment that meets specific demand separately, the seal test device of relevant industry, mostly in " mechanical design handbook ", can find similar reference design, on market, also can buy the common loose mail of this device of combination, so standard component.For use occasion outbalance, the comparatively strict leakage test proving installation of precision control, not only need the cooperation of oil, vapour, machine, also need electric cooperation, normally rely on auxiliary mechanical fitting or electronic sensor etc., directly or indirectly come the product of this type of design is carried out a kind of so-called control or adjusting, this kind equipment, device just need specialized designs, manufacturing.Among the China invention CN86106923A " controllable mechanical sealing ", adopt the more advanced sealing regulative mode of electromechanical combination sensing exactly.
In the oil-filled transformer manufacturing industry, the standard of carrying out about leakage test is at present: GB T6451-2008 " oil-immersed power transformer technical requirement and parameter ", its interior 4.3.4 bar regulation is: " transformer palpus leakage test is gone through 12h and is answered ne-leakage and damage.Its test pressure is as follows: a) transformer (hermetically sealed type transformer that comprises oil conservater band barrier film) of general structure fuel tank should bear the test pressure of 40kPa; B) transformer of corrugated fuel tank (comprise and have elasticity gilled radiator fuel tank): 315kVA and following person should bear the test pressure of 20kPa; 400kVA and above person should bear the test pressure of 15kPa; C) the fuel tank internal hermetically sealed type transformer that is filled with gas should bear the test pressure of 76kPa.Its surplus pressure must not be less than 70% of setting.”。Can analyze from the clause of this standard: under rated pressure, the sealing test that lasts 12 hours still can have 30% weak loss, it serves to show that this requirement is low.Obviously: within the systematic error of the combinations such as small bad error of the error of test equipment, transformer installation errors, Seal Design all can be included and be not found.Given this error span of Yao Qiuing is well-to-do, and clever people finish electric performance test, suspended core, the extraordinary test of oil product etc. usually, carry out this mechanical seal test at last.Comparatively careful person usually sees that the oil-filled transformer seat that uses after a period of time has greasy dirt, and one of reason wherein is exactly that mechanical seal is qualified but still be not real hermetically sealed.
Therefore people relatively are accustomed to common tester as shown in Figure 2, connect clean source of the gas and oil-filled transformer respectively by gate valve, just can carry out leakage test.Air inlet and all rely on hand that relevant flow velocity and pressure are controlled in the switching of gate valve when unloading gas, the turbulent flow during air inlet usually, it all is inevitable taking fluid when unloading gas out of.In fact: in the test data, necessarily contain the error of non-tight design itself interior.In the test industry, for the rational leakage test instrument itself that will use, not only wanting can be unique, and must be unique deficiency of telling Seal Design, and can not the oil-filled transformer electric performance test of arranging subsequently be influenced to some extent, can not occur the withstand voltage reduction phenomenon of non-reality to the extraordinary test of oil product.Therefore, demand urgently and the more urgent reasonable testing tool that the arbitrary stage that the oil-filled transformer leakage test can be arranged will occur.
Summary of the invention
Task of the present invention is: a kind of oil-filled transformer leakage test testing tool is provided, this instrument is not only simple in structure, easy to use, more needing can be in oil-filled transformer all events process of the test, can be in office a stage arrange leakage test, comprise first test and follow-up test do not had any adverse side effect.
Technical scheme of the present invention is: a kind of oil-filled transformer leakage test testing tool, comprise that general purpose tester and pressure flow slow-readjustment device form, and it is characterized in that: the gas outlet of pressure flow slow-readjustment device is connected with the air intake opening of general purpose tester.Described pressure flow slow-readjustment device is by web member, the instrument cover, the instrument core, spring, end cap, adjusting lever, adjusting circle forms, described instrument core is contained in the instrument cover, have diversion trench on this instrument core, the axial length of described diversion trench can guarantee not add after finishing assembling under the situation that gas feeds relatively, and web member has certain narrow slit, can pass in and out test product herein by warranty test gas, put at instrument adjusting lever is housed, by carrying out axially-movable to adjusting circle, set adjusting lever the position, make pressure flow slow-readjustment device can best-fit the test condition of different test products.Be delivered to spring after adjusting the responsive to axial force adjusting lever on the circle, spring changes its elongation or compressive state thereupon, under the effect of spring force, this instrument core is adjusted concrete position in the instrument cover, also just determined the narrow slit size of the relative web member of diversion trench under different operating modes.The original state of spring when the actual axle of instrument cover cavity has determined that to the extension distance instrument core is being tested: the gas of input rated pressure after along with on-test, this gas at first directly rushes at the effect end face of end cap inboard, minimum portion gas enters test product from the original narrow slit of diversion trench and web member, after treating that the gas of air chamber is full, under the effect of supercharging, a unnecessary gas part is pushed the retroaction end face on the instrument core to, when treating that instrument core pressurized enlarges air chamber, portion gas enters test product after diversion trench overflows mistake; This gas enter test product moment air chamber interior pressure slightly descend, towards the direction motion that reduces air chamber, the gas that overflows into test product also just reduces the instrument core under the effect of spring; Along with follow-up constant pressure is constant, after pressurized enlarges air chamber, still there is portion gas after diversion trench overflows mistake, to enter test product; This action goes round and begins again, and the shock-free slow tested cavity with test product of test gas takes to the rated pressure balance that requires, and can close the gate valve of air duct this moment, stops gas transmission, enters the pressurize test of stipulated time length.After finishing sealing test, unload the external flue that is connected on the air intake opening with pressure flow slow-readjustment device, instrument cover was formed air chamber interior gas moment with the instrument core and was returned to the normal pressure consistent with atmospheric pressure this moment, after losing the equalized pressure effect on the instrument core retroaction end face, the instrument core is under the promotion of spring, at once towards the direction motion of dwindling air chamber, the position of when reaching design, setting, this has also objectively turned down the space between diversion trench and web member on the instrument core, exists this moment the gases at high pressure in the test product must also can only be slow by the original space between this diversion trench and web member, steadily leak, emptying.
Advantage of the present invention is:
1. the oil-filled transformer leakage test testing tool of being formed by general purpose tester and pressure flow slow-readjustment device, it is a kind of state of slow rill when test gas enters test product, no turbulent flow phenomenon can not pressed test product fluid, does not have gas yet and dissolves in fluid and form the gassiness oil molecule; Also be a kind of state of slow rill when test gas withdraws from test product, no fluid is overflowed with gas;
2. use this oil-filled transformer leakage test testing tool, tested person sequence limit not, can intert in each stage of test and carry out, being included in the phase one just carries out this leakage test, and the arrangement of time that is conducive to production technology department construction card can rationally be regulated in full code test scope, is conducive to this laboratory and client and decides through consultation test sequence, the bigger leeway of circling round, adjust is arranged, can eliminate redundancy time, namely increase work efficiency, reduce testing expense again.
Description of drawings
Below in conjunction with drawings and Examples the present invention is further described:
The front elevation of the oil-filled transformer leakage test testing tool that Fig. 1 is made up of general purpose tester (Fig. 2) and pressure flow slow-readjustment device (Fig. 3);
Fig. 2 is the front elevation of the general purpose tester of existing general use;
Fig. 3 is the front elevation of pressure flow slow-readjustment device of the present invention;
Fig. 4 is the axonometric drawing of instrument core (3), the auxiliary particular location that indicates air chamber, retroaction end face, diversion trench;
Fig. 5 is that pressure flow slow-readjustment device Figure 10 of the present invention is at air chamber B position amplification profile;
Fig. 6 is adjusting lever (7) the D position amplification profile of pressure flow slow-readjustment device Figure 10 of the present invention;
Fig. 7 is that pressure flow slow-readjustment device of the present invention is installed in the axonometric drawing on the test product (9);
Wherein: 1 is web member; 2 is the instrument cover; 3 is the instrument core; 4 is spring; 5 is end cap; 6 is adjusting lever; 7 for adjusting circle; 8 be (on the instrument core) diversion trench; 9 is test product; 10 is air chamber; 11 are the retroaction end face; 12 are the effect end face; 13 is (pressure flow slow-readjustment device) air intake opening; 14 is (general purpose tester) gas outlet; 15 is (general purpose tester) air intake opening; 16 is (pressure flow slow-readjustment device) gas outlet.
Fig. 8 is the partial enlarged drawing of axonometric drawing Fig. 7;
Fig. 9 is the cross section view A-A of pressure flow slow-readjustment device Fig. 3 of the present invention;
Figure 10 is the cross section view A-A of pressure flow slow-readjustment device Fig. 3 of the present invention, and its left end is made D and amplified sign, and its right-hand member is made B and amplified sign;
Embodiment
Embodiment: a kind of oil-filled transformer leakage test testing tool, comprise that general purpose tester and pressure flow slow-readjustment device form, described pressure flow slow-readjustment device by web member 1, instrument cover 2, instrument core 3, spring 4, end cap 5, adjusting lever 6, adjust 7 on circle and form.
Generally speaking, the gas outlet 16 of pressure flow slow-readjustment device of the present invention is connected to before test on the air intake opening 15 of general purpose tester, when test is prepared, gas outlet 14 ends of general purpose tester are connected on the test product 9 as shown in Figure 7, external flue are connected on the air intake opening 13 of pressure flow slow-readjustment device; During the beginning leakage test, at first open the gate valve of external flue side, moment pours in the gas of instrument cover 2 and instrument core 3 and end cap 5 composition air chambers 10, minimum portion gas enters test product 9 by the diversion trench 8 of instrument core 3, most of gas acts under retroaction end face 11 force actions of end faces 12 and instrument core 3 at the different end cap 5 of sectional area, promote instrument core 3 to the direction motion that enlarges air chamber 10, under the prevention of spring 4, instrument core 3 is moving slightly just to stop in this position, after increment gas entered test product 9 again, the weak balance of various states formed, after the entering of more gases, said process goes round and begins again, be full of test product 9 cavitys until gas, the pressure of gas reaches ratings, and can close the gate valve of external flue side this moment, stop gas transmission, enter the pressurize test of stipulated time length.
After finishing sealing test, unload the external flue that is connected on the air intake opening with pressure flow slow-readjustment device, instrument cover 2 was formed air chambers interior gas moments with instrument core 3 and end cap 5 and was returned to the normal pressure consistent with atmospheric pressure this moment, after losing the equalized pressure effect on the instrument core 3 retroaction end faces 11, instrument core 3 is under the promotion of spring 4, at once towards the direction motion of dwindling air chamber 10, the position of when reaching design, setting, the space that this has also objectively turned down 1 of diversion trench 8 and web member on the instrument core 3, exist this moment gases at high pressure in the test product 9 must be also can only be slow by the space of 1 of this diversion trench 8 and web member, steadily leak, empty to normal pressure.
The size variation in diversion trench 8 and 1 space of web member on the instrument core 3 is actually by the gas that enters and shed thereupon and regulates, and the intelligence when being design is set.Enlarge the gap during air inlet slowly, moment is closed this gap to aperture when unloading gas, guaranteed air inlet, give vent to anger steadily and suitable, the gas that does not namely have excessive pressure is added to fluid, do not have exhaust yet and take fluid when too urgent out of, when can guaranteeing to carry out the oil-filled transformer leakage test, pressure flow slow-readjustment device of the present invention all can carry out leakage test in each stage, and to electrical property, the oil product in the transformer is not had any interference.
Under average service conditions, people have been accustomed to valve type to flow, pressure is regulated.Typical usually is not that valve is reached maximum waterdrainage amount when washing one's hands exactly, valve neither be opened for only dripping; In the high-end field control flow, controlled pressure are had many solutions, between between this invention will produce significant impact to existing use field.Below only be concrete exemplary applications of the present invention: protection scope of the present invention is not constituted any limitation; in addition to the implementation; the present invention can also have other embodiment; as just need slowly carrying out patient's oxygen therapy facing death or deadly peril in hospitality industry; also need slowly to carry out in the oiling to automobile, aircraft etc.; to avoid generation of static electricity, in many medium-to-high grade applications practical value is widely arranged.All employings are equal to the technical scheme of replacement or equivalent transformation formation, as the mode of carrying out different adjusting instrument core 3 according to this principle as (Fig. 4) moving; As adjust instrument and overlap 2, (on the instrument core) diversion trench 8, the air inlet/outlet direction on the instrument core 3; As take other designs to fix instrument cover 2 and the 4 no relative radially changes of instrument core, not out of control with the motion of assurance (on the instrument core) diversion trench 8, suchlike change all drops within the present invention's scope required for protection.
Claims (4)
1. oil-filled transformer leakage test testing tool comprises that general purpose tester and pressure flow slow-readjustment device form, and it is characterized in that: the gas outlet (16) of pressure flow slow-readjustment device is connected with the air intake opening (15) of general purpose tester.
2. oil-filled transformer leakage test testing tool according to claim 1 is characterized in that: pressure flow slow-readjustment device by web member (1), instrument cover (2), instrument core (3), spring (4), end cap (5), adjusting lever (6), adjust circle (7) and formed.
3. oil-filled transformer leakage test testing tool according to claim 1 is characterized in that: have diversion trench (8) on the described instrument core (3).
4. oil-filled transformer leakage test testing tool according to claim 1 is characterized in that: adjusting lever (6) is housed on the described instrument cover (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220708222 CN203231874U (en) | 2012-12-20 | 2012-12-20 | Oil-immersed transformer seal test instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220708222 CN203231874U (en) | 2012-12-20 | 2012-12-20 | Oil-immersed transformer seal test instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203231874U true CN203231874U (en) | 2013-10-09 |
Family
ID=49287994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220708222 Expired - Lifetime CN203231874U (en) | 2012-12-20 | 2012-12-20 | Oil-immersed transformer seal test instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203231874U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103528769A (en) * | 2013-10-24 | 2014-01-22 | 中电电气(江苏)股份有限公司 | Sealing leakage test device for oil-immersed transformer |
-
2012
- 2012-12-20 CN CN 201220708222 patent/CN203231874U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103528769A (en) * | 2013-10-24 | 2014-01-22 | 中电电气(江苏)股份有限公司 | Sealing leakage test device for oil-immersed transformer |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131009 |
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| CX01 | Expiry of patent term |