CN108982579A - A kind of oil immersion-type distribution transformer winding material non-destructive testing test clip - Google Patents
A kind of oil immersion-type distribution transformer winding material non-destructive testing test clip Download PDFInfo
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- CN108982579A CN108982579A CN201810480483.8A CN201810480483A CN108982579A CN 108982579 A CN108982579 A CN 108982579A CN 201810480483 A CN201810480483 A CN 201810480483A CN 108982579 A CN108982579 A CN 108982579A
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- hole inner
- inner panel
- slide bar
- outside plates
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N25/00—Investigating or analyzing materials by the use of thermal means
- G01N25/20—Investigating or analyzing materials by the use of thermal means by investigating the development of heat, i.e. calorimetry, e.g. by measuring specific heat, by measuring thermal conductivity
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
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Abstract
The invention discloses a kind of oil immersion-type distribution transformer winding material non-destructive testing test clips, it includes: four hole outside plates and two through hole inner panel；Four hole outside plates are fixedly connected with two through hole inner panel by slide bar；The both ends of slide bar are fixed by hex bolts respectively；The centre of four hole outside plates and two through hole inner panel is additionally provided with four through-hole inner panels, through-hole is additionally provided on four through-hole inner panels, slide bar passes through through-hole and four through-hole inner panels is fixed among four hole outside plates and two through hole inner panel, and four through-hole inner panels are slided between four hole outside plates and two through hole inner panel by slide bar；Pressure spring is equipped on slide bar, the both ends of pressure spring are fixed with four hole outside plates and four through-hole inner panels.The beneficial effect that the present invention obtains is: overcoming the problems, such as that conventional clamp clamps that unstable, clamping dimension is big, fixture includes mechanical grip and part of data acquisition, mechanical grip part guarantees that measurement line and transformer conducting bar are in close contact, and the thermoelectrical potential that data acquisition measurement line generates the temperature and winding of contact site is acquired.
Description
Technical field
The present invention relates to oil immersion-type distribution transformer technical field, especially a kind of oil immersion-type distribution transformer winding material
Non-destructive testing test clip.
Background technique
Distribution transformer does winding using copper material, is the requirement of company of Utilities Electric Co. and many power consumers, but some
Evil mind businessman does not stint the transformer manufactured with aluminium winding to utmostly pursue interests, is substituted the bad for the good with this.This kind of " aluminium is for copper " becomes
Depressor make power consumer according to pure copper wire price buy be personation aluminum winding transformer, economically also suffered damage
It loses.On the other hand, the aluminum winding transformer quality of this producer's production is also difficult to ensure, brings security risk.
Currently, Electric Power Research Institute, State Grid Chongqing Electric Power Company is directed to the winding material of distribution transformer, study
Transformer winding material non-destructive testing based on thermoelectrical potential, this method high reliablity out, specifically refer to application No. is
The Chinese utility model patent of entitled 201620701836.9 " a kind of transformer winding material intelligent diagnostics device ", application number
For a kind of 201710841433.3 entitled " transformer winding material detection methods " patent of invention, application No. is
The patent of invention of 201710841351.9 entitled " a kind of transformer winding material detection equipment and system ".
The above patent of invention is to measure winding junction generated thermoelectrical potential after heating using pyroelectric effect.
But the penalty method needs used in the above patent are heated in winding one end, and connect two groups of measurements in this one end of heating
Line, this is easy wiring to the longer copper bar of dry-type transformer, however the conducting rod of oil immersion-type distribution transformer is very short, usually not
More than 50mm, two groups of measurement lines and a heating device are connected on so short conducting rod, there are certain difficulty, and in order to
Guarantee also to keep at least distance of 10mm between effectively two groups of measurement lines of compensation, original measured material no longer meets to be wanted
It asks.
How more accurately the conducting rod of oil immersion-type distribution transformer measurement point after heating is measured in acquisition
The thermoelectrical potential that the temperature at place and winding both ends generate, the above patent are not described in detail.
Based on the above issues, the present invention provides a kind of test for oil immersion-type distribution transformer winding material non-destructive testing
Fixture.
Summary of the invention
In view of the above drawbacks of the prior art, it is an object of the invention to provide a kind of oil immersion-type distribution transformer windings
Material non-destructive testing test clip is acquired thermoelectrical potential using two identical copper wire of two pairs of thermocouples, ensure that thermoelectricity
The accuracy of gesture acquisition, and reduce the wiring quantity on fixture, so that measurement is more acurrate convenient.
Realized the purpose of the present invention is technical solution in this way, a kind of oil immersion-type distribution transformer winding material without
Damage detection test clip, it includes:
Four hole outside plates and two through hole inner panel；Company is fixed by the first slide bar with two through hole inner panel in four hole outside plate
It connects；The both ends of first slide bar pass through hex bolts respectively and fix with four hole outside plates and two through hole inner panel；
The centre of four hole outside plate and two through hole inner panel is additionally provided with four through-hole inner panels, also sets on the four through-holes inner panel
It is equipped with first through hole, first slide bar passes through first through hole and four through-hole inner panels are fixed in four hole outside plates and two through hole inner panel
Between, the four through-holes inner panel can be slided between four hole outside plates and two through hole inner panel by the first slide bar；
Also be equipped with the first pressure spring on first slide bar, and the both ends of first pressure spring respectively with four hole outside plates and four
Through-hole inner panel is fixed；
It further include having two hole outside plates, two hole outside plate is fixedly connected by the second slide bar and four through-hole inner panels；Institute
The both ends for stating the second slide bar pass through hex bolts respectively and fix with two hole outside plates and four through-hole inner panels；
The second through-hole is additionally provided on the two through hole inner panel, second slide bar passes through the second through-hole for two through hole inner panel
It is fixed among two hole outside plates and four through-hole inner panels, the two through hole inner panel can be by the second slide bar in two hole outside plates and four through-holes
It is slided between inner panel；
Also be equipped with the second pressure spring on second slide bar, and the both ends of second pressure spring respectively with two hole outside plates and two
Through-hole inner panel is fixed；
The first card slot for fixing wire rod is provided on the opposing end surface of the four through-holes inner panel and two through hole inner panel；
The second card slot of fixed wire rod is additionally provided on the opposing end surface of the two through hole inner panel and four through-hole inner panels.
Further, four hole outside plate and two hole outside plates can be polyether-ether-ketone outside plate.
Further, the four through-holes inner panel and two through hole inner panel can be polyether-ether-ketone inner panel.
Further, first slide bar and the second slide bar can be stainless steel slide bar.
Further, first pressure spring and the second pressure spring can be stainless steel pressure spring.
Further, the wire rod can be polytetrafluoroethylene (PTFE) wire rod.
Further, on the wire rod can screw-tightened coiling thermocouple a pole.
Further, every circle screw electrode spacing on wire rod is in 1.5mm between 2mm.
Further, a pole of the thermocouple can be contra wire or copper wire.
By adopting the above-described technical solution, the present invention has the advantage that:
(1) test fixture of the present invention can accurately acquire the temperature of measurement point and the size of winding both ends thermoelectrical potential；
(2) test fixture of the present invention, which successfully solves the problems, such as that oil immersed type distribution transforming conducting rod is shorter, can not take penalty method, make
Measurement data is compensated, and measurement result is more accurate；
(3) accuracy measured conducting copper temperature is improved, the position of thermoelectrical potential and the position phase of temperature collection are acquired
Together；
(4) thermoelectrical potential is acquired using two identical copper wire of two pairs of thermocouples, ensure that thermoelectrical potential acquisition
Accuracy, and reduce the wiring quantity on fixture, so that measurement is more acurrate convenient.
Other advantages, target and feature of the invention will be illustrated in the following description to a certain extent, and
And to a certain extent, based on will be apparent to those skilled in the art to investigating hereafter, Huo Zheke
To be instructed from the practice of the present invention.
Detailed description of the invention
Detailed description of the invention of the invention is as follows:
Fig. 1 is the overall architecture schematic diagram of oil immersion-type distribution transformer winding material non-destructive testing test clip.
Fig. 2 is a certain viewing angle constructions schematic diagram of oil immersion-type distribution transformer winding material non-destructive testing test clip.
Fig. 3 is two through hole inner plate structure schematic diagram in oil immersion-type distribution transformer winding material non-destructive testing test clip.
Fig. 4 is four through-hole inner plate structure schematic diagrames in oil immersion-type distribution transformer winding material non-destructive testing test clip.
Specific embodiment
Present invention will be further explained below with reference to the attached drawings and examples.
Embodiment: as shown in Figures 1 to 4；A kind of oil immersion-type distribution transformer winding material non-destructive testing test clip, it is wrapped
It has included:
Four hole outside plates 1 and two through hole inner panel 4；Four hole outside plates 1 pass through 5 company of being fixed of the first slide bar with two through hole inner panel 4
It connects；The both ends of first slide bar 5 pass through hex bolts 8 and four hole outside plates 1 respectively and two through hole inner panel 4 is fixed；
The centre of four hole outside plates 1 and two through hole inner panel 4 is additionally provided with four through-hole inner panels 3, is additionally provided on four through-hole inner panels 3
First through hole 13, the first slide bar 5 pass through first through hole 13 and four through-hole inner panels 3 are fixed in four hole outside plates 1 and two through hole inner panel 4
Between, four through-hole inner panels 3 can be slided between four hole outside plates 1 and two through hole inner panel 4 by the first slide bar 5；
Also be equipped with the first pressure spring 6 on first slide bar 5, and the both ends of the first pressure spring 6 respectively with four hole outside plates 1 and four through-holes
Inner panel 3 is fixed；
It further include having two hole outside plates 2, two hole outside plates 2 are fixedly connected by the second slide bar 9 with four through-hole inner panels 3；The
The both ends of two slide bars 6 pass through hex bolts 8 and two hole outside plates 2 respectively and four through-hole inner panels 3 are fixed；
The second through-hole 14 is additionally provided on two through hole inner panel 4, the second slide bar 9 passes through the second through-hole 14 for two through hole inner panel 4
It is fixed among two hole outside plates 2 and four through-hole inner panels 3, two through hole inner panel 4 can be by the second slide bar 9 in two hole outside plates 2 and four-way
It is slided between hole inner panel 3；
The second pressure spring 10 is also equipped on second slide bar 9, and the both ends of the second pressure spring 10 are logical with two hole outside plates 2 and two respectively
Hole inner panel 4 is fixed；
The first card slot for fixing wire rod 7 is provided on four through-hole inner panels 3 and the opposing end surface of two through hole inner panel 4
11；The second card slot 12 of fixed wire rod 7 is additionally provided on the opposing end surface of two through hole inner panel 4 and four through-hole inner panels 3.
Four hole outside plates 1 and two hole outside plates 2 are polyether-ether-ketone outside plate, and four through-hole inner panels 3 and two through hole inner panel 4 are polyether-ether-ketone
Inner panel.
First slide bar 5 and the second slide bar 6 can be 304 stainless steel slide bars, and stainless steel slide bar has preferable rigidity, uses the longevity
Life length.
First pressure spring 6 and the second pressure spring 10 can be 201 stainless steel pressure springs, and spring should have certain elastic force, guarantee coiling
Stick can be in close contact with the conducting rod of distribution transformer.
As shown in Figure 3, wherein two wire rods 7 are respectively clamped into two through hole inner panel 4, and spiral side is used on wire rod
A pole (contra wire or copper wire) for formula fastening coiling thermocouple.It is required that every circle screw electrode spacing is in 1.5mm between 2mm.
As shown in Figure 4, wherein two wire rods 7 are respectively clamped into four through-hole inner panels 3, and spiral side is used on wire rod
A pole (copper wire or contra wire) for formula fastening coiling thermocouple.It is required that every circle screw electrode spacing is in 1.5mm between 2mm.
Wire rod 7 can be polytetrafluoroethylene (PTFE) wire rod, have good insulation performance, ensure that between the two poles of the earth of thermocouple
Good insulation performance, while making the acquisition to thermoelectrical potential more accurate.
On wire rod 7 can screw-tightened coiling thermocouple a pole.The two poles of the earth (copper wire and contra wire) of thermocouple bullet respectively
Spring formula is wrapped on two wire rods 7, it is desirable that in 1.5mm between 2mm, coiling length is not less than every circle screw electrode spacing
20mm.So that the two poles of the earth of the winding thermocouple on wire rod 7 can be in close contact with the conducting rod of distribution transformer.
The present invention relates to a kind of test fixture for oil immersion-type distribution transformer winding material non-destructive testing, invention tests
Grip device overcomes the problems, such as that conventional clamp clamps that unstable, clamping dimension is big, for the cylinder of oil-immersed transformer conducting rod
Shape threaded exterior and design.Fixture includes mechanical grip part and part of data acquisition composition: mechanical grip part guarantees measurement
Line and transformer conducting bar are in close contact, and data acquisition measurement line is to the thermoelectricity generated at the temperature and winding joint of contact site
Gesture is acquired.
The present invention is when in use it is noted that the following:
(1) fixture of hot end and cold end is clamped in respectively on the conducting rod at the both ends of oil-immersed transformer winding, on fixture
The temperature of thermocouple acquisition is the temperature of measured material wire rod retaining part.
(2) measurement of thermoelectrical potential is adopted by the identical copper wire of two root timber matter of two groups of temperature thermocouples in measured material
Collection.
(3) notice that hot end is different with the retaining part of cold end fixture in use process, hot end fixture is clamped in matching for heating
Become on conducting rod.
It should be understood that the part that this specification does not elaborate belongs to the prior art.Finally, it is stated that above
Embodiment is only used to illustrate the technical scheme of the present invention and not to limit it, although having carried out in detail referring to preferred embodiment to the present invention
Illustrate, those skilled in the art should understand that, can with modification or equivalent replacement of the technical solution of the present invention are made,
Without departing from the objective and range of the technical program, it is intended to be within the scope of the claims of the invention.
Claims (9)
1. a kind of oil immersion-type distribution transformer winding material non-destructive testing test clip, which is characterized in that the test clip includes:
Four hole outside plates (1) and two through hole inner panel (4)；Four hole outside plate (1) and two through hole inner panel (4) are carried out by the first slide bar (5)
It is fixedly connected；The both ends of first slide bar (5) pass through hex bolts (8) and four hole outside plates (1) and two through hole inner panel (4) respectively
It is fixed；
The centre of four hole outside plate (1) and two through hole inner panel (4) is additionally provided with four through-hole inner panels (3), the four through-holes inner panel
(3) it is additionally provided on first through hole (13), first slide bar (5) passes through first through hole (13), and four through-hole inner panels (3) are fixed
Intermediate in four hole outside plates (1) and two through hole inner panel (4), the four through-holes inner panel (3) can be by the first slide bar (5) in four hole outside plates
(1) it is slided between two through hole inner panel (4)；
It is also equipped with the first pressure spring (6) on first slide bar (5), and the both ends of first pressure spring (6) are respectively and outside four holes
Plate (1) and four through-hole inner panels (3) are fixed；
It further include having two hole outside plates (2), two hole outside plate (2) is fixed by the second slide bar (9) with four through-hole inner panels (3)
Connection；The both ends of second slide bar (6) pass through hex bolts (8) and two hole outside plates (2) respectively and four through-hole inner panels (3) are solid
It is fixed；
It is additionally provided with the second through-hole (14) on the two through hole inner panel (4), second slide bar (9) will across the second through-hole (14)
Two through hole inner panel (4) is fixed on two hole outside plates (2) and four through-hole inner panels (3) are intermediate, and the two through hole inner panel (4) can pass through second
Slide bar (9) is slided between two hole outside plates (2) and four through-hole inner panels (3)；
Also be equipped with the second pressure spring (10) on second slide bar (9), and the both ends of second pressure spring (10) respectively with two holes
Outside plate (2) and two through hole inner panel (4) are fixed；
First for fixing wire rod (7) is provided on the opposing end surface of the four through-holes inner panel (3) and two through hole inner panel (4)
Card slot (11)；Fixed wire rod (7) is additionally provided on the opposing end surface of the two through hole inner panel (4) and four through-hole inner panels (3)
Second card slot (12).
2. oil immersion-type distribution transformer winding material non-destructive testing test clip as described in claim 1, which is characterized in that described
Four hole outside plates (1) and two hole outside plates (2) can be polyether-ether-ketone outside plate.
3. oil immersion-type distribution transformer winding material non-destructive testing test clip as described in claim 1, which is characterized in that described
Four through-hole inner panels (3) and two through hole inner panel (4) can be polyether-ether-ketone inner panel.
4. oil immersion-type distribution transformer winding material non-destructive testing test clip as described in claim 1, which is characterized in that described
First slide bar (5) and the second slide bar (6) can be 304 stainless steel slide bars.
5. oil immersion-type distribution transformer winding material non-destructive testing test clip as described in claim 1, which is characterized in that described
First pressure spring (6) and the second pressure spring (10) can be 201 stainless steel pressure springs.
6. oil immersion-type distribution transformer winding material non-destructive testing test clip as described in claim 1, which is characterized in that described
Wire rod (7) can be polytetrafluoroethylene (PTFE) wire rod.
7. oil immersion-type distribution transformer winding material non-destructive testing test clip as described in claim 1, which is characterized in that described
On wire rod (7) can screw-tightened coiling thermocouple a pole.
8. oil immersion-type distribution transformer winding material non-destructive testing test clip as claimed in claim 7, which is characterized in that coiling
Every circle screw electrode spacing on stick (7) is in 1.5mm between 2mm.
9. oil immersion-type distribution transformer winding material non-destructive testing test clip as claimed in claim 7, which is characterized in that described
One pole of thermocouple can be contra wire or copper wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810480483.8A CN108982579B (en) | 2018-05-18 | 2018-05-18 | Nondestructive testing clamp for material of oil-immersed distribution transformer winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810480483.8A CN108982579B (en) | 2018-05-18 | 2018-05-18 | Nondestructive testing clamp for material of oil-immersed distribution transformer winding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108982579A true CN108982579A (en) | 2018-12-11 |
| CN108982579B CN108982579B (en) | 2021-02-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810480483.8A Active CN108982579B (en) | 2018-05-18 | 2018-05-18 | Nondestructive testing clamp for material of oil-immersed distribution transformer winding |
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| CN108982579B (en) | 2021-02-26 |
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