CN206450296U - One kind refraction comparison expression Buchholz relay oil level indicating device - Google Patents
One kind refraction comparison expression Buchholz relay oil level indicating device Download PDFInfo
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- CN206450296U CN206450296U CN201720120180.6U CN201720120180U CN206450296U CN 206450296 U CN206450296 U CN 206450296U CN 201720120180 U CN201720120180 U CN 201720120180U CN 206450296 U CN206450296 U CN 206450296U
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- 239000011521 glass Substances 0.000 claims abstract description 35
- 238000012544 monitoring process Methods 0.000 claims description 28
- 238000012806 monitoring device Methods 0.000 description 14
- 235000015927 pasta Nutrition 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 2
- NCGICGYLBXGBGN-UHFFFAOYSA-N 3-morpholin-4-yl-1-oxa-3-azonia-2-azanidacyclopent-3-en-5-imine;hydrochloride Chemical compound Cl.[N-]1OC(=N)C=[N+]1N1CCOCC1 NCGICGYLBXGBGN-UHFFFAOYSA-N 0.000 description 1
- 241001062009 Indigofera Species 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 238000000205 computational method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 235000003642 hunger Nutrition 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 210000001747 pupil Anatomy 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
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- 230000009466 transformation Effects 0.000 description 1
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Abstract
The utility model embodiment discloses a kind of refraction comparison expression Buchholz relay oil level indicating device, solves current tour personnel when oil level is checked in ground by the observation window of Buchholz relay because whether completely transformer oil clear, colorless is difficult to differentiate in Buchholz relay the technical problem of oil-filled or shortage of oil situation.The utility model embodiment includes：Rear baffle, first marking line and Article 2 marking line；Rear baffle is arranged inside Buchholz relay, parallel with the glass window of Buchholz relay；First marking line is arranged at rear baffle surface, and Article 2 marking line is arranged at glass window surface, and Article 2 marking line is parallel with first marking line.
Description
Technical field
The utility model is related to Buchholz relay field, more particularly to a kind of refraction comparison expression Buchholz relay oil level is indicated
Device.
Background technology
At present, Buchholz relay is a kind of protection device essential in transformer station, positioned at the conservator and oil of transformer
In pipeline between case, the oil stream and air-flow produced during using transformer internal fault promotes the actuating of relay, point light gas protecting
With grave gas protection, the former is used to alert, and the latter is used for tripping transformer, and its safe operation to power system and equipment is played
Vital effect.Usual tour personnel checks oil level by the observation window of Buchholz relay during tour and then sentenced
Whether disconnected gas content and main transformer operating condition are normal.But transformer oil is clear, colorless, the contact surface of oil and gas
Be not it is obvious that when personnel station is in ground observation, it is difficult to tell in Buchholz relay whether it is completely oil-filled or it is oily not
Sufficient situations such as；Secondly the transformer oil of long-play is by having certain adsorption capacity, internal contact meeting after thermal oxide
Occur to glue dead phenomenon.When main transformer operation exception or oil seepage cause pasta decline in Buchholz relay, float will not fall, phase
The make and break contact for alarming and tripping answered will not also be acted, and Buchholz relay can lose the protection to transformer, and this can give
Tour personnel brings erroneous judgement.
Utility model content
The utility model embodiment discloses a kind of refraction comparison expression Buchholz relay oil level indicating device, solves at present
Tour personnel is when oil level is checked in ground by the observation window of Buchholz relay because transformer oil clear, colorless is difficult to resolution watt
In this relay whether completely oil-filled or shortage of oil situation technical problem.
The utility model embodiment provides a kind of refraction comparison expression Buchholz relay oil level indicating device, including：
Rear baffle, first marking line and Article 2 marking line；
Rear baffle is arranged inside Buchholz relay, parallel with the glass window of Buchholz relay；
First marking line is arranged at glass window surface, and Article 2 marking line is arranged at rear baffle surface, Article 2
Marking line is parallel with first marking line.
Preferably, in addition to：
Overhead gage, lower baffle plate, right baffle-plate, right shell body；
Overhead gage, lower baffle plate, right baffle-plate, right shell body and rear baffle and glass window sealing constitute rectangular parallelepiped structure.
Preferably, overhead gage, lower baffle plate, right baffle-plate, right shell body and rear baffle are provided with logical oily circular hole, for keeping gear
The connection of intralamellar part and Buchholz relay.
Preferably, overhead gage, lower baffle plate, right baffle-plate and right shell body length are the diameter of glass window.
Preferably, monitoring point is provided with below Buchholz relay, for by monitoring first marking line and Article 2
Oil level situation inside the situation monitoring Buchholz relay of marking line.
Preferably, the level height of Article 2 marking line is more than the level height of first marking line.
Preferably, the color of first marking line is different with the color of Article 2 marking line.
As can be seen from the above technical solutions, the utility model embodiment has advantages below：
The utility model embodiment provides a kind of refraction comparison expression Buchholz relay oil level indicating device, including：After keep off
Plate, first marking line and Article 2 marking line；Rear baffle is arranged inside Buchholz relay, is seen with the glass of Buchholz relay
Examine window parallel；First marking line is arranged at rear baffle surface, and Article 2 marking line is arranged at glass window surface, Article 2
Marking line is parallel with first marking line.By setting first marking line on rear baffle and in gas relay in the present embodiment
The glass window of device sets Article 2 marking line so that when ground monitoring point observes the oil level of Buchholz relay by comparing
The relative position of Article 2 marking line and first marking line can determine whether to obtain the oil level situation of Buchholz relay, when gas relay
During device oil-free, tour personnel station is in monitoring point or first marking line and Article 2 of the monitoring device observation for being arranged at monitoring point
Marking line is just overlapped；And when Buchholz relay is full of oil, because oil is different from the refractive index of air, tour personnel station is in prison
Measuring point is arranged at first marking line that the monitoring device of monitoring point observes and can occur refraction shift phenomenon, first sign
Line and Article 2 marking line can not be overlapped.The oil level in Buchholz relay can be judged rapidly using the difference between both of these case
Situation, solves current tour personnel when oil level is checked in ground by the observation window of Buchholz relay because transformer oil is transparent
It is colourless be difficult to differentiate Buchholz relay in whether completely oil-filled or shortage of oil situation technical problem.
Brief description of the drawings
, below will be to embodiment in order to illustrate more clearly of the utility model embodiment or technical scheme of the prior art
Or the accompanying drawing used required in description of the prior art is briefly described, it should be apparent that, drawings in the following description are only
It is some embodiments of the present utility model, for those of ordinary skill in the art, before creative labor is not paid
Put, other accompanying drawings can also be obtained according to these accompanying drawings.
Fig. 1 reflects comparison expression Buchholz relay oil level indicating device for a kind of band provided in the utility model embodiment
The single float Buchholz relay front view of ring flange connection；
The three-dimensional of refraction comparison expression Buchholz relay oil level indicating devices of the Fig. 2 to be provided in the utility model embodiment is shown
It is intended to；
Fig. 3 monitors side view for the one kind provided in the utility model embodiment；
The solid that Fig. 4 observes for the tour personnel provided in the utility model embodiment or monitoring device from lower left
Figure；
Fig. 5 be in the utility model embodiment in the Buchholz relay that provides full of oil when tour personnel or monitoring device see
The schematic diagram observed；
Fig. 6 is tour personnel or monitoring dress when only half is oily in the Buchholz relay that provides in the utility model embodiment
Put the schematic diagram observed；
Fig. 7 is another monitoring side view that provides in the utility model embodiment；
Fig. 8 is the schematic diagram of first marking line and Article 2 the marking line extension provided in the utility model embodiment；
Fig. 9 is the monitoring side after first marking line providing and the extension of Article 2 marking line in the utility model embodiment
View.
Brief description of the drawings：1 glass window, 2 baffle plates, 3 first marking lines, 4 Article 2 marking lines, 5 logical oily circular holes, 6 watts
Medium (oil or air) in this relay, 7 rear baffle interfaces, 8 glass window interfaces, eyes/monitoring dress of 9 tour personnels
Put camera, 10 outside airs, 11 be snap point, and 12 be pasta in Buchholz relay.
Embodiment
The utility model embodiment discloses a kind of refraction comparison expression Buchholz relay oil level indicating device, solves at present
Tour personnel is when oil level is checked in ground by the observation window of Buchholz relay because transformer oil clear, colorless is difficult to resolution watt
In this relay whether completely oil-filled or shortage of oil situation technical problem.
Referring to Fig. 1, a kind of refraction comparison expression Buchholz relay oil level provided in the utility model embodiment indicates dress
The one embodiment put includes：
Rear baffle, first marking line 3 and Article 2 marking line 4；
Rear baffle is arranged inside Buchholz relay, parallel with the glass window 1 of Buchholz relay；
First marking line 3 is arranged at rear baffle surface, and first marking line 4 is arranged at the surface of glass window 1, second
Bar marking line 4 is parallel with first marking line 3.
Further, in addition to：
Overhead gage, lower baffle plate, right baffle-plate, right shell body；
Overhead gage, lower baffle plate, right baffle-plate, right shell body and rear baffle and the sealing of glass window 1 constitute rectangular parallelepiped structure.
Further, overhead gage, lower baffle plate, right baffle-plate, right shell body and rear baffle are provided with logical oily circular hole, for keeping
The connection of baffle interior and Buchholz relay.
Further, overhead gage, lower baffle plate, right baffle-plate and right shell body length are the diameter of glass window 1.
Further, overhead gage, lower baffle plate, right baffle-plate and right shell body use glass transparent material, are easy to external observation.
Further, first marking line 3 and Article 2 marking line 4 use different colors.
As shown in figure 1, be the single float Buchholz relay front view of ring flange connection of EMB companies 02 (AF 25/6) model,
The refraction comparison expression Buchholz relay oil level indicating device schematic three dimensional views that Fig. 2 is provided for the utility model embodiment are (with circle
Glass window 1 is before just).The light mainly sent in the utility model using first marking line 3 is in oil and air
Refraction effect occurs for interface to judge oil level.Therefore first marking line 3 and Article 2 marking line 4 are using different and easy
The color distinguished is distinguished, such as first marking line 3 is using red, and Article 2 marking line 4 is using blueness, to reach rapid identification
Effect.
Wherein, first marking line 3 is located in the clinodiagonal of rear baffle, and Article 2 marking line 4 is located at glass window 1
Surface on, to be convenient to it is observed that oil level situation inside whole Buchholz relay.
Further, the distance of rear baffle and glass window 1 can pacify according to transformer oil refractive index and Buchholz relay
Dress height is calculated by refraction principle to be obtained.
Further, monitoring point is provided with below Buchholz relay, for by monitoring first marking line 3 and second
Oil level situation inside the situation monitoring Buchholz relay of bar marking line 4；
Monitoring point can move freely, for adjusting monitoring angle.
It should be noted that the monitoring point set can place the monitoring device that can move freely for wearing camera, it is used for
Oil level situation real-time Transmission to Control Room is monitored.In addition, also observation monitoring can be carried out by tour personnel.
Further, the level height of first marking line 3 is more than the level height of Article 2 marking line 4；
Difference in level between first marking line 3 and Article 2 marking line 4 is according to Buchholz relay setting height(from bottom) and prison
Point position is calculated and obtained.
Further, the width of first marking line 3 is calculated according to Buchholz relay setting height(from bottom) and monitoring angle.
Referring to Fig. 3, being monitoring side view.Wherein, 8 the eyes of tour personnel or the camera of monitoring device can be represented,
Height apart from ground is h1, and the angle that the camera of human eye or monitoring device is looked up is θ, may be set to 45 °.Below will
It is described in detail for different oil levels in Buchholz relay.
Situation 1：6 be air, i.e. Buchholz relay observation window region oil-free, and the light that S0 is sent is directly entered human eye, people
The intersection point of the straight line that eye is constituted with S0 and glass window 1 is S1, and all S0 constitute first marking line 3, and all S1 are
Constitute the Article 2 marking line 4 that the surface of glass window 1 is set.During observation window oil-free, personnel can only see in specified observation place
To first marking line 4 of blueness, red first marking line 3 of the inside is blocked by the Article 2 marking line 4 of blueness, maked an inspection tour
The stereogram that personnel or monitoring device are observed is shown in Fig. 4.
Situation 2：6 for oil, i.e., Buchholz relay observation window region full of oil, the light that S0 is sent from oily air inlet when meeting
Generation is reflected and off-normal (because glass is relatively thin, the influence of thickness of glass birefringence can be neglected).There is transformation by the law of refraction
The refractive index of device oil：
The refractive index of oil is more than 1, then refraction angle i2 is more than incidence angle i1.Fringence can downward bias, the friendship of its reverse extending line
Point S2 is S0 virtual image, and the virtual image S2 that human eye or monitoring device are seen closer looks at window compared with origin S0.Human eye with as 2 points of S2
Between the intersection point of straight line and glass window 1 be S3, from the figure 3, it may be seen that S3 is above S1, so being filled when in Buchholz relay
During full oil, tour personnel can be appreciated that blueness and red two oblique lines, as shown in Figure 5.First red marking line 3 is in indigo plant in figure
The top of the Article 2 marking line 4 of color.
Situation 3：Pasta is located in Buchholz relay observation window, and the light that first marking line 3 of ullage is sent is straight
Tap into human eye, and the light that pasta lower bar is sent enters human eye after being reflected through oil to air.As shown in fig. 6, patrolling
It can be appreciated that first red marking line 3 of top is overlapped with the Article 2 marking line 4 of blueness depending on personnel, first of lower section red
Marking line 3 can be offset up, the place 11 fractureed as oil surface level, and 12 be actual pasta in Buchholz relay in Fig. 6.
Due to occurring to be become apparent from during breakage phenomenon compared with first two situation, so being easier observation when few oil in Buchholz relay
Arrive.
The width to Article 2 marking line 3 is determined below.
Be about 1 jiao point to the resolution capability of light in view of human eye (at 1 meter it can be seen that point be about away from the limit
0.291mm), it can't see together with object of the width less than 1 jiao point can melt with background.
Computational methods are as follows：
The radian of 1 degree=2 π/360；
1 jiao point=1/60 degree=0.000291 radian；
At 1 meter it can be seen that smallest point away from (being approximately equal to arc length)：
Δ d0=radians * radiuses=0.000291*1000mm=0.291 (mm)；
So at L meters it can be seen that smallest point away from：
Δ d=L* Δs d0=0.291L (mm)；
If height is h meter to Buchholz relay from the ground, Buchholz relay is observed with θ angles (taking 45 degree), human eye and gas after
The distance of electrical equipment：
L ≈ h/sin θ=√ 2h；
The then minimum widith of first marking line 3：
(the mm)=0.412h (mm) of 0.291 (mm)=√ 2hsin θ * of dmin=L* Δ d0=h/sin θ * 0.291；
Retain 20% nargin, the width of first marking line 3 can be taken as：
D0=(1+20%) dmin=1.2*0.412h=0.4944h (mm)；
If h is equal to 8m, is calculated and known by above formula, when tour personnel only detects by an unaided eye, the optimal width of first marking line 3
For 4mm.
If tour personnel's profit telescopic observation, it is assumed that the multiplication factor of telescope is μ, then first marking line 3 be most
Excellent width is 4/ μm of m.
The step of being determined above for the width to first marking line 3, below will be to first marking line 3 and glass
It is determined between observation window 1 apart from d2.
Because the refraction comparison expression Buchholz relay oil level indicating device that the utility model is provided is to utilize refraction principle, if
Smaller apart from d2 between first marking line 3 and glass window 1, refraction effect can not substantially, point S3 and S1 meetings in Fig. 3
Overlap, it is impossible to distinguish whether Buchholz relay has oil, therefore d2 can not be too small.Size in view of Buchholz relay device itself is remote
Less than its height h from the ground, it may be assumed that the virtual image S2 and S0 in Fig. 3 is on same interface, and width is d0, such as Fig. 7 institutes
Show.
To ensure that 2 points of virtual image S2 and S0 is misaligned and people can effectively distinguish, the distance between 2 points d3 should be greater than
In d0, i.e.,：
D3=k*d0；
Wherein, k is proportionality coefficient, more than or equal to 1.The width of other human eye pupil and baffle plate is filled much smaller than Buchholz relay
Put, it may be assumed that the refraction angle i2 that the light that S0 is sent is retrodeviated from normal through superrefraction is approximately equal to eye-observation angle, θ, i.e.,：
I2=θ；
Incidence angle can be obtained by the law of refraction：
I1=sin-1[n*sin(i2)]；
Geometrical relationship can be obtained in Fig. 7：
In summary formula can be obtained：
It can be seen that the folding of the distance between first marking line 3 and glass window 1 d2 and transformer oil
Penetrate rate n, Buchholz relay setting height(from bottom) and proportionality coefficient k relevant.If n takes 1.4, θ to take 45 °,
K takes 2, and simplification has：
D2=3.509h (mm).
The step of being to being determined between first marking line 3 and glass window 1 apart from d2 above, below will be to patrolling
It is determined depending on personnel or monitoring device observation place point.
Due to the difference between tour personnel's height, the height on human eye and ground is different, when with θ angles determine first mark
After position relationship between timberline 3 and Article 2 marking line 4, first that the people station of different heights is observed in same place marks
Position relationship between timberline 3 and Article 2 marking line 4 can be different.In order to adapt to the observation demand of different personnel, by
One marking line 3 and Article 2 marking line 4 extend, as shown in figure 8,3 be the extension of first marking line 3 of glazing surface
Point, 4 be the prolongation of inner panel Article 2 marking line 4.Tour personnel only need to be immediately below Buchholz relay horizontal line go forward
It is mobile afterwards to can determine that oil level observes place.As shown in figure 9, when human eye apart from ground level be h2 (be more than h1) when, people front
The S1 and S0 observed after certain distance is moved forward towards Buchholz relay can on the same line, two now observed
Extension oblique line can be overlapped, then the tour personnel institute station location is the correct observation place of Buchholz relay oil level.
In summary analysis is known, tour personnel is first according to first marking line 3 and the prolongation of Article 2 marking line 4
It is determined that correctly observing place, then the position of two datum lines is that can determine whether the oil level in Buchholz relay in paired observation window.
Show the serious oil starvation of Buchholz relay when only seeing first marking line 4 of blueness；Show when seeing two parallel lines watt
Oil is sufficient in this relay；Show that pasta is in observation window when breakage phenomenon occurs for first marking line 3 seen.Due to
Transformer oil is filled with whole Buchholz relay under normal circumstances, and first marking line 3 or the first is only seen so working as
When bar marking line 3 fractures, illustrate main transformer operation exception, corresponding measure need to be taken immediately.
When being detected using monitoring device, the filmed image that monitoring personnel can send according to monitoring device, to monitoring
Setting position is adjusted, and specific method of adjustment is similar to the above, and here is omitted.
The utility model embodiment provides a kind of refraction comparison expression Buchholz relay oil level indicating device, including：After keep off
Plate, first marking line and Article 2 marking line；Rear baffle is arranged inside Buchholz relay, is seen with the glass of Buchholz relay
Examine window parallel；First marking line is arranged at rear baffle surface, and Article 2 marking line is arranged at glass window surface, Article 2
Marking line is parallel with first marking line.By setting first marking line on rear baffle and in gas relay in the present embodiment
The glass window of device sets Article 2 marking line so that when ground monitoring point observes the oil level of Buchholz relay by comparing
The relative position of Article 2 marking line and first marking line can determine whether to obtain the oil level situation of Buchholz relay, when gas relay
During device oil-free, first marking line and Article 2 when tour personnel stands in monitoring point or be arranged at the monitoring device observation of monitoring point
Marking line is just overlapped；And when Buchholz relay is full of oil, because oil is different from the refractive index of air, tour personnel station is in prison
Measuring point is arranged at first marking line that the monitoring device of monitoring point observes and can occur refraction shift phenomenon, first sign
Line and Article 2 marking line can not be overlapped.The oil level in Buchholz relay can be judged rapidly using the difference between both of these case
Situation, solves current tour personnel when oil level is checked in ground by the observation window of Buchholz relay because transformer oil is transparent
It is colourless be difficult to differentiate Buchholz relay in whether completely oil-filled or shortage of oil situation technical problem.
A kind of refraction comparison expression Buchholz relay oil level indicating device provided by the utility model has been carried out in detail above
It is thin to introduce, for those of ordinary skill in the art, according to the thought of the utility model embodiment, in embodiment and should
With will change in scope, in summary, this specification content should not be construed as to limitation of the present utility model.
Claims (7)
1. one kind refraction comparison expression Buchholz relay oil level indicating device, it is characterised in that including：
Rear baffle, first marking line and Article 2 marking line；
The rear baffle is arranged inside Buchholz relay, parallel with the glass window of the Buchholz relay；
First marking line is arranged at the glass window surface, and the Article 2 marking line is arranged at rear baffle table
Face, the Article 2 marking line is parallel with first marking line.
2. refraction comparison expression Buchholz relay oil level indicating device according to claim 1, it is characterised in that also include：
Overhead gage, lower baffle plate, right baffle-plate, right shell body；
The overhead gage, the lower baffle plate, the right baffle-plate, the right shell body and the rear baffle and the glass window are close
Envelope constitutes rectangular parallelepiped structure.
3. refraction comparison expression Buchholz relay oil level indicating device according to claim 2, it is characterised in that the upper gear
Plate, the lower baffle plate, the right baffle-plate, the right shell body and the rear baffle are provided with logical oily circular hole, for keeping baffle plate
The internal connection with Buchholz relay.
4. refraction comparison expression Buchholz relay oil level indicating device according to claim 2, it is characterised in that the upper gear
Plate, the lower baffle plate, the right baffle-plate and the right shell body length are the diameter of the glass window.
5. refraction comparison expression Buchholz relay oil level indicating device according to claim 1, it is characterised in that at described watt
Monitoring point is provided with below this relay, is monitored for the situation by monitoring first marking line and Article 2 marking line
Oil level situation inside the Buchholz relay.
6. refraction comparison expression Buchholz relay oil level indicating device according to claim 1, it is characterised in that described first
The level height of bar marking line is more than the level height of the Article 2 marking line.
7. refraction comparison expression Buchholz relay oil level indicating device according to claim 1, it is characterised in that described first
The color of bar marking line is different with the color of the Article 2 marking line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720120180.6U CN206450296U (en) | 2017-02-09 | 2017-02-09 | One kind refraction comparison expression Buchholz relay oil level indicating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720120180.6U CN206450296U (en) | 2017-02-09 | 2017-02-09 | One kind refraction comparison expression Buchholz relay oil level indicating device |
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| Publication Number | Publication Date |
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| CN206450296U true CN206450296U (en) | 2017-08-29 |
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ID=59664757
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| CN201720120180.6U Expired - Fee Related CN206450296U (en) | 2017-02-09 | 2017-02-09 | One kind refraction comparison expression Buchholz relay oil level indicating device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112747804A (en) * | 2021-01-22 | 2021-05-04 | 中国长江电力股份有限公司 | Photoelectric non-contact power transformer oil conservator oil level monitoring device and method |
-
2017
- 2017-02-09 CN CN201720120180.6U patent/CN206450296U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112747804A (en) * | 2021-01-22 | 2021-05-04 | 中国长江电力股份有限公司 | Photoelectric non-contact power transformer oil conservator oil level monitoring device and method |
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Granted publication date: 20170829 |