CN105445110A - Simple method for testing mechanical strength of transformer oil tank - Google Patents
Simple method for testing mechanical strength of transformer oil tank Download PDFInfo
- Publication number
- CN105445110A CN105445110A CN201511002215.8A CN201511002215A CN105445110A CN 105445110 A CN105445110 A CN 105445110A CN 201511002215 A CN201511002215 A CN 201511002215A CN 105445110 A CN105445110 A CN 105445110A
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- Prior art keywords
- fuel tank
- chalk line
- test
- oil tank
- measurement point
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/08—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces
- G01N3/10—Investigating strength properties of solid materials by application of mechanical stress by applying steady tensile or compressive forces generated by pneumatic or hydraulic pressure
- G01N3/12—Pressure testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/30—Measuring arrangements characterised by the use of mechanical techniques for measuring the deformation in a solid, e.g. mechanical strain gauge
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- General Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
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- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Examining Or Testing Airtightness (AREA)
Abstract
The invention relates to a simple method for testing the mechanical strength of a transformer oil tank, belonging to the technical field of special test detection for transformer production. The technical scheme is as follows: the method comprises the following steps: erecting a reference rod (2) at four corners of an oil tank (1) respectively, and connecting the four reference rods together through a chalk line (3), wherein the chalk line and the reference rods are combined together and surround the oil tank to form a measurement external reference which stays still in a test process; determining a measurement point on the outer side of the oil tank wall, wherein the spatial location of the measurement point dynamically moves along with the change of actual vacuum degree/pressure value in the oil tank; measuring the space variation between the measurement point and the chalk line using a box staff when the oil tank is in negative-pressure and positive-pressure states; and comparing the dynamic variations of the two measurement results to obtain the test data and test conclusion. The method provided by the invention is easy and convenient to operate, the test data is accurate and visual, the test process can be completely monitored, and a single person can finish the whole test, and thus the method is flexible and convenient; and moreover, instability and scrap of the oil tank are effectively prevented.
Description
Technical field
The present invention relates to a kind of simple and easy method of oil tank of transformer mechanical robustness testing, belong to transformer manufacturing Special test detection technique field.
Background technology
In order to verify whether the physical strength of oil tank of transformer project organization meets the request for utilization of transformer, need to carry out mechanical robustness testing to oil tank of transformer.Generally oil tank of transformer should meet the requirement of vacuum pressure and the malleation physical strength specified in GB/T6451 and GB/T16274, to ensure the physical strength of fuel tank when transformer vacuum oil and transformer run.Owing to not having special oil tank of transformer mechanical robustness testing equipment, it is very inconvenient to carry out oil tank of transformer mechanical robustness testing, and be difficult to precisely, carry out intuitively the measurement of deflection, complex operation, likely causes fuel tank unstability to scrap.
Summary of the invention:
The object of the invention is the simple and easy method being to provide a kind of oil tank of transformer mechanical robustness testing, precisely, the measurement of fuel tank deflection in process of the test is realized intuitively, flexibly simple to operation, the full monitoring of process of the test can be realized simultaneously, effectively prevent the generation that fuel tank unstability is scrapped, solve the problems referred to above that background technology exists.
Technical scheme of the present invention: a kind of simple and easy method of oil tank of transformer mechanical robustness testing, comprises following steps:
at the corner place of fuel tank, baseline rod is set respectively, and by a chalk line, four baseline rods is connected together, be combined into one by chalk line and baseline rod, be surrounded on fuel tank surrounding, thus form measurement outside reference, keep static in process of the test;
measurement point is determined outside fuel tank tank wall; Along with the change of fuel tank internal practical vacuum degree/force value, the locus occurrence dynamics displacement thereupon of measurement point;
measure fuel tank under negative pressure and barotropic state with box chi, the spacing variable quantity of measurement point and chalk line, by contrasting the dynamic variable quantity of twice measurement result, draws test figure and conclusion (of pressure testing).
Beneficial effect of the present invention: simple to operation, test figure is precisely directly perceived, and can realize the full monitoring of process of the test, single can the whole test of complete independently, use box chi can measure all test figures, flexibly and easily, effectively prevent the generation that fuel tank unstability is scrapped.
Accompanying drawing explanation
Fig. 1 is schematic perspective view of the present invention;
Fig. 2 is front schematic view of the present invention;
Fig. 3 of the present inventionly overlooks diagram;
In figure: 1. oil tank of transformer, 2. baseline rod, 3. chalk line.
Embodiment
Below in conjunction with accompanying drawing, by embodiment, the invention will be further described.
A simple and easy method for oil tank of transformer mechanical robustness testing, comprises following steps:
baseline rod 2 is set respectively at the corner place of fuel tank 1, and by a chalk line 3, four baseline rods is connected together, be combined into one by chalk line and baseline rod, be surrounded on fuel tank surrounding, thus form measurement outside reference, keep static in process of the test;
measurement point is determined outside fuel tank tank wall; Along with the change of fuel tank internal practical vacuum degree/force value, the locus occurrence dynamics displacement thereupon of measurement point;
measure fuel tank under negative pressure and barotropic state with box chi, the spacing variable quantity of measurement point and chalk line, by contrasting the dynamic variable quantity of twice measurement result, draws test figure and conclusion (of pressure testing).
With reference to accompanying drawing 1,2, fuel tank 1 is placed on platform, and fuel tank 1 four jiaos evenly places baseline rod 2; Fuel tank 1 is highly H, gets the H/2 height and position of fuel tank 1, and four baseline rods 2 bundle chalk line 3, makes chalk line 3 border be surrounded on fuel tank 1 surrounding.
With reference to accompanying drawing 2, measurement point selection principle is: the most weak part of the intensity of test product, is typically chosen in the H/2 At The Height of fuel tank 1, contour with chalk line 3, point centered by the long axis centerline of fuel tank 1, several measurement points of the uniform selection in left and right; Measure with box chi and record the distance between each measurement point to chalk line 3, and as the primary data D1 tested; In process of the test, baseline rod 2 and chalk line 3 need to keep enough steadinesss, to ensure the accurate of measurement data.
With reference to accompanying drawing 3, mechanical robustness testing: first carry out negative pressure (vacuum state) test, after carry out positive pressure test, measure fuel tank under negative pressure state with box chi, the spacing variable quantity D2 of measurement point and chalk line; Fuel tank is measured under barotropic state, the spacing variable quantity D3 of measurement point and chalk line with box chi; D1 is primary data, and D2 is the data under negative pressure (vacuum) state, and D3 is the data under barotropic state; Wherein D2>D1>D3, the difference of (D2-D1) is the deflection under fuel tank 1 negative pressure state, and the absolute value of (D3-D1) is the deflection under fuel tank 1 barotropic state; Sentence according to above-mentioned measurement data and respective country standard, whether oil-break case intensity is qualified under malleation, negative pressure state.
When the method is applied at the scene, testing crew takes the deformation carved and pay close attention to measuring negative pressure, malleation data and fuel tank strength weak position, seriously should stop test immediately, prevent fuel tank intensity unstability and even scrap if deform.
Claims (2)
1. a simple and easy method for oil tank of transformer mechanical robustness testing, is characterized in that comprising following steps:
at the corner place of fuel tank (1), baseline rod (2) is set respectively, and by a chalk line (3), four baseline rods are connected together, be combined into one by chalk line and baseline rod, be surrounded on fuel tank surrounding, thus form measurement outside reference, keep static in process of the test;
measurement point is determined outside fuel tank tank wall; Along with the change of fuel tank internal practical vacuum degree/force value, the locus occurrence dynamics displacement thereupon of measurement point;
measure fuel tank under negative pressure and barotropic state with box chi, the spacing variable quantity of measurement point and chalk line, by contrasting the dynamic variable quantity of twice measurement result, draws test figure and conclusion (of pressure testing).
2. the simple and easy method of a kind of oil tank of transformer mechanical robustness testing according to claim 1 and 2, is characterized in that concrete steps:
Fuel tank (1) is placed on platform, and baseline rod (2) is evenly placed in fuel tank (1) corner; Fuel tank (1) is highly H, gets the H/2 height and position of fuel tank (1), and four baseline rods (2) bundle chalk line (3), makes chalk line (3) border be surrounded on fuel tank (1) surrounding;
Measurement point selection principle is: the most weak part of intensity of test product, selects the H/2 At The Height at fuel tank (1), contour with chalk line (3), point centered by the long axis centerline of fuel tank (1), several measurement points of the uniform selection in left and right; Measure with box chi and record the distance between each measurement point to chalk line (3), and as the primary data D1 tested; In process of the test, baseline rod (2) and chalk line (3) keep enough steadinesss;
Mechanical robustness testing: first carry out negative pressure test, after carry out positive pressure test; Fuel tank is measured under negative pressure state, the spacing variable quantity D2 of measurement point and chalk line with box chi; Fuel tank is measured under barotropic state, the spacing variable quantity D3 of measurement point and chalk line with box chi; D1 is primary data, and D2 is the data under negative pressure state, and D3 is the data under barotropic state; Wherein D2>D1>D3, the difference of (D2-D1) is the deflection under fuel tank (1) negative pressure state, and the absolute value of (D3-D1) is the deflection under fuel tank (1) barotropic state; Sentence according to above-mentioned measurement data and respective country standard, whether oil-break case intensity is qualified under malleation, negative pressure state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511002215.8A CN105445110A (en) | 2015-12-29 | 2015-12-29 | Simple method for testing mechanical strength of transformer oil tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201511002215.8A CN105445110A (en) | 2015-12-29 | 2015-12-29 | Simple method for testing mechanical strength of transformer oil tank |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105445110A true CN105445110A (en) | 2016-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201511002215.8A Pending CN105445110A (en) | 2015-12-29 | 2015-12-29 | Simple method for testing mechanical strength of transformer oil tank |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106124192A (en) * | 2016-08-31 | 2016-11-16 | 芜湖亚奇汽车部件有限公司 | Device for tank pressure tests |
| CN113008541A (en) * | 2021-03-22 | 2021-06-22 | 保定天威保变电气股份有限公司 | Automatic measuring device and method for mechanical strength test of power transformer |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58124926A (en) * | 1982-01-21 | 1983-07-25 | Toshiba Corp | Dynamic pressure testing device of oil contained electric apparatus tank |
| CN103364280A (en) * | 2013-08-01 | 2013-10-23 | 江苏亨特集团华特电气有限公司 | Method for testing mechanical strength of transformer fuel tank |
| CN103674722A (en) * | 2013-12-18 | 2014-03-26 | 中国西电电气股份有限公司 | High-intensity seal welding oil tank normal pressure test method and normal pressure test system based on same |
| CN203785613U (en) * | 2014-04-30 | 2014-08-20 | 山东电力设备有限公司 | Tool for measuring deformation of transformer oil tank |
-
2015
- 2015-12-29 CN CN201511002215.8A patent/CN105445110A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58124926A (en) * | 1982-01-21 | 1983-07-25 | Toshiba Corp | Dynamic pressure testing device of oil contained electric apparatus tank |
| CN103364280A (en) * | 2013-08-01 | 2013-10-23 | 江苏亨特集团华特电气有限公司 | Method for testing mechanical strength of transformer fuel tank |
| CN103674722A (en) * | 2013-12-18 | 2014-03-26 | 中国西电电气股份有限公司 | High-intensity seal welding oil tank normal pressure test method and normal pressure test system based on same |
| CN203785613U (en) * | 2014-04-30 | 2014-08-20 | 山东电力设备有限公司 | Tool for measuring deformation of transformer oil tank |
Non-Patent Citations (1)
| Title |
|---|
| 方思超: "变压器油箱真空强度的有限元分析及优化", 《万方学位论文》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106124192A (en) * | 2016-08-31 | 2016-11-16 | 芜湖亚奇汽车部件有限公司 | Device for tank pressure tests |
| CN113008541A (en) * | 2021-03-22 | 2021-06-22 | 保定天威保变电气股份有限公司 | Automatic measuring device and method for mechanical strength test of power transformer |
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Application publication date: 20160330 |