CN206258554U - Buchholz relay flow velocity setting device - Google Patents
Buchholz relay flow velocity setting device Download PDFInfo
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- CN206258554U CN206258554U CN201621302559.0U CN201621302559U CN206258554U CN 206258554 U CN206258554 U CN 206258554U CN 201621302559 U CN201621302559 U CN 201621302559U CN 206258554 U CN206258554 U CN 206258554U
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- buchholz relay
- pressure
- flow velocity
- control unit
- setting device
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Abstract
The utility model discloses a kind of Buchholz relay flow velocity setting device, including control unit and pressure detecting assembly, pressure detecting assembly is used to push up open relay baffle plate and pressure of the Buchholz relay baffle plate when Buchholz relay is acted is detected during top is opened, and send to control unit, control unit is used to be obtained according to pressure signal the flow speed value of Buchholz relay.Buchholz relay flow velocity setting device of the present utility model has the advantages that simple structure, small volume, measures convenient.
Description
Technical field
The utility model relates generally to electrical equipment technical field, refers in particular to a kind of Buchholz relay flow velocity setting device.
Background technology
The method of verification Buchholz relay grave gas verification is to flow through Buchholz relay based on flow sensor measures at present
The flow velocity of middle oil, and the power size of regulation motor changes flow velocity, is preserved now when flow velocity reaches Buchholz relay working value
Flow speed value.Current Buchholz relay model bore is various, in order to adapt to the Buchholz relay and flow velocity of different bores, tester
Must volume weight it is big, be only suitable for being verified in the lab.There is also portable Buchholz relay on the market, but one
Partial devices volume is still excessively huge, weight big, and a part of device can only carry out school to certain specific model Buchholz relay
Test, application is not strong.
Utility model content
The technical problems to be solved in the utility model is that：For the technical problem that prior art is present, this practicality is new
Type provides a kind of simple structure, small volume, the Buchholz relay flow velocity setting device of measurement simplicity.
In order to solve the above technical problems, the utility model proposes technical scheme be：
A kind of Buchholz relay flow velocity setting device, including control unit and pressure detecting assembly, the pressure detecting group
Part is connected with described control unit, for push up open relay baffle plate and detect during top is opened Buchholz relay baffle plate watt
Pressure when this relay grave gas is acted, and send to control unit, described control unit is used to be obtained according to pressure signal
The flow speed value of Buchholz relay.
As the further improvement of above-mentioned technical proposal：
The pressure detecting assembly includes probe and pressure sensor, and the probe is connected with the pressure sensor, uses
Catch is opened in top and obtain pressure signal and send to pressure sensor.
Also include measurement column, the measurement column is provided with measured hole in the axial direction, the external diameter of the measurement column with it is described
The internal diameter of the pipeline of Buchholz relay matches, and the internal diameter of the measurement column matches with the external diameter of the probe.
The pressure detecting assembly passes sequentially through amplifying circuit and AD conversion module is connected with described control unit.
Described control unit is connected with display unit, for being shown in real time to pressure signal or flow speed value.
Compared with prior art, the utility model has the advantage of：
Buchholz relay flow velocity setting device of the present utility model, directly drives Buchholz relay by pressure detecting assembly top
Baffle plate, and during baffle plate is opened on top real-time detection baffle plate pressure value, so as to when Buchholz relay grave gas are acted
The pressure value of baffle plate is obtained, corresponding flow speed value is then obtained according to the intrinsic pressure of Buchholz relay-flow relation；Structure letter
It is list, small volume, easy to operate.Measured using measurement column auxiliary in addition, ensure that the position of baffle plate is opened on probe top will not
It is mobile, it is ensured that the reliability of measurement.
Brief description of the drawings
Fig. 1 is frame principle figure of the present utility model.
Fig. 2 is the structural representation of pressure detecting assembly of the present utility model.
Fig. 3 is the structural representation of measurement column in the utility model.
Fig. 4 is one of the utility model structural representation in a particular embodiment.
Fig. 5 is the two of the utility model structural representation in a particular embodiment.
Fig. 6 is flow velocity setting method flow chart of the present utility model.
Fig. 7 is contrastive test method flow diagram of the present utility model
Label is represented in figure：1st, control unit；2nd, pressure detecting assembly；21st, pop one's head in；22nd, pressure sensor；23rd, measure
Post；24th, measured hole；3rd, display unit；4th, pipeline；5th, baffle plate；6th, clip.
Specific embodiment
The utility model is further described below in conjunction with Figure of description and specific embodiment.
As shown in Figures 1 to 5, the Buchholz relay flow velocity setting device of the present embodiment, including control unit 1 and pressure are examined
Component 2 is surveyed, pressure detecting assembly 2 is connected with control unit 1, for pushing up open relay baffle plate 5 and the detection during top is opened
Pressure of the Buchholz relay baffle plate 5 in Buchholz relay grave gas action (setting value), and send to control unit 1, control
Unit 1 is used to be obtained according to pressure signal the flow speed value of Buchholz relay.When actually used,.Gas of the present utility model after
Electrical equipment flow velocity setting device, directly pushes up the baffle plate 5 for driving Buchholz relay, and open the mistake of baffle plate 5 on top by pressure detecting assembly 2
The pressure value of real-time detection baffle plate 5 in journey, so as to obtain the pressure value of baffle plate 5 when Buchholz relay act, then basis watt
The intrinsic pressure of this relay-flow relation obtains corresponding flow speed value (flow speed value when i.e. grave gas are acted)；Simple structure,
It is small volume, easy to operate.
In the present embodiment, pressure detecting assembly 2 includes probe 21 and pressure sensor 22, probe 21 and pressure sensor 22
It is connected, opens catch for top and obtain pressure signal and send to pressure sensor 22.Additionally include measurement column 23, measurement column
23 are provided with measured hole 24 in the axial direction, and the external diameter of measurement column 23 matches with the internal diameter of pipeline 4 of Buchholz relay, measurement column
23 internal diameter matches with the external diameter of probe 21.Measured using the auxiliary of measurement column 23, ensure that baffle plate 5 is opened on the top of probe 21
Position (measurement point A) will not move, it is ensured that the reliability of measurement.When measuring, due to the restriction effect of measured hole 24,
Measurement point A can be remained at the circle centre position of pipeline 4 during baffle plate 5 is promoted, so as to ensure measurement point to baffle plate 5
The uniformity of the torque of spring.
In the present embodiment, pressure detecting assembly 2 passes sequentially through amplifying circuit and AD conversion module and is connected with control unit 1,
Sent to control unit 1 with being converted into digital quantity signal after being amplified to the pressure mould analog quantity signal for detecting.
As shown in Fig. 2 in the present embodiment, control unit 1 is connected with display unit 3, for pressure signal or flow speed value
Shown in real time.Other communication interface of the push-button unit with display unit 3 respectively with control unit 1 (processor) is connected, and uses
Determine function and display test data in selection；USB interface is connected with processor, for transferring data to host computer；Grave gas
Signal input interface (clip 6) is connected with processor, when Buchholz relay grave gas contact is acted, by grave gas signal input
To processor.
In the present embodiment, pressure sensor 22 using ZNLBM-2 types pressure sensor 22, the sensor have high precision,
Easy for installation, offset load resistance is strong, good airproof performance the features such as.It is as shown in the table for important technological parameters：
| Rated load | 0.5~1.5kN |
| Synthesis precision | 0.02 |
| Unbalance loading rate | 5% |
| Sensitivity | 1.5mV/V |
| Input impedance | 380±10Ω |
| Output impedance | 350±3Ω |
| For bridge voltage | Suggestion 10VDC |
| Material | Steel alloy |
Amplify precision to improve, using two low noises, low maladjustment voltage, low drifting amplification chip ADA4528, the core
The drift of piece offset voltage is close to 0, can continuous any DC error of self-correction, amplification accuracy is kept as far as possible.Except low
Offset voltage and drift are outer, and also without 1/f noise, this key property helps to carry out essence in direct current or low frequency ADA4528
Really measurement.Two operational amplifier A DA4528 are configured to the first order of three amplifier instrument amplifiers, the 3rd operational amplifier
Differential amplifier is connected as, second level amplification is generally used for, in the circuit, the differential input end of AD7791 performs this function.
In addition using AD7791 as AD sampling A/D chips, AD7791 is 4 analog-to-digital conversions of a kind of high resolution 2 that AD companies of the U.S. release
Device.AD7791 is applied to the full simulation front end of low frequency measurement application, employs and-poor (∑-△) switch technology, can be with
Realize up to 24 without error performance, with low noise (<1.1uVrms), 0.0003% nonlinearity and chip interface electricity
The features such as road is simple, easily can be connected with microprocessor.The multiplication factor of this amplifying circuit is Uo/Ui=(R1+R2
+ Rg)/Rg, multiplication factor can be made to meet the requirement of AD7791 input ranges (when AD7791 uses 5V benchmark by adjusting RG
During voltage, difference analogue input range is equal to ± 5V or 10V p-p).Wherein using STM32F103R8T6B chips as device
Core processor.The chip possesses the cpu frequency of 72MHz, and the program space has 64K bytes, and RAM has 20K bytes.Timer work(
3 16 general timers, 1 16 senior timer can be possessed.Serial communication interface possesses 2 SPI interfaces, and 1 C connects
Mouthful, 3 USART interfaces, 1 CAN2.0 interface, 1 USB interface supports USBOTG at full speed, supports Ethernet.Analog port is gathered around
There are 2 12 16 passage ADC ports, 1 12 2 passage DAC ports.It is full and the chip also possesses up to 51 I/O ports
The output of foot this verifying attachment liquid crystal display, the input of " grave gas " trigger signal, the input of sensing data and survey report
Generation.Additionally, in order that device adapts to the modified of new model or old model, improving Comparability test ability, system increased
It is a piece of to extend out Flash chip, for storage configuration and measurement data, it is also possible to store various types of pressure-flow functions.
Selection w25q64 type spi flash chips, the chip increased the efficiently function such as double/tetra- input and output, and clock frequency reaches
80MHz, equivalent reading (continuous) speed is 320 megabits per second (40 Mbytes), and this is standard 50MHz serial flash transmission rates
More than six times.
As shown in Figure 6 and Figure 7, the specific setting method of Buchholz relay flow velocity setting device of the present utility model include with
Lower step：
S01, the baffle plate 5 that Buchholz relay is driven using the top of pressure detecting assembly 2, and the real-time detection gear during top is opened
The pressure of plate 5；When Buchholz relay grave gas are acted, the record pressure of baffle plate 5 that now pressure detecting assembly 2 is detected, and
The pressure signal of baffle plate 5 is sent to control unit 1；
S02, control unit 1 obtain corresponding flow velocity according to the pressure signal of baffle plate 5, and using the relation of pressure-flow velocity
Value.
In step S01, measurement column 23 is inserted in the pipeline 4 of Buchholz relay, and by probe 21 along measurement column 23
Measured hole 24 is stretched into opens baffle plate 5 with top, so as to carry out the detection of pressure, it is ensured that the reliability of pressure measxurement.
Pressure suffered on baffle plate 5 when deflecting to contact adhesive by measuring Buchholz relay interior panelling 5, then basis
Pressure obtains measurement flow speed value with the corresponding relation of flow velocity.Due to the Buchholz relay of same producer's same model have it is basically identical
External form, thus the relational expression of its pressure-flow velocity is to determine, therefore can the Buchholz relay of same producer's same model be built
Found a relational expression V=f (F) for pressure-flow velocity, and then set up the relational expression storehouse of many producer's models, as long as thus measurement obtain
Pressure F values, it is possible to formula is called from relational expression storehouse, then is calculated flow speed value, wherein relational expression storehouse pass through contrastive test
Obtain, and completed before flow velocity is adjusted, specially：One is selected through checking qualified gas-actuated relay calibration stand, such as
WSJY-3 gas-actuated relay calibration stands, one Buchholz relay of reselection, such as the QJ4-80 types gas of the emerging production in Shenyang four after
Electrical equipment.In the flow rates of 0.6-2.0m/s, the scale that selection is more than 14, measurement obtains more than 14 corresponding pulling force
Value, more than 14 corresponding standard flow rate values are obtained using the measurement of WSJY-3 gas-actuated relay calibration stands, then by more than 14
Value of thrust and more than 14 standard flow rate values substitute into least square methods so as to obtain a pressure-flow velocity relation formula.Using same
Quadrat method, test of comparing to different manufacturers different model Buchholz relay, sets up pressure-flow velocity relation formula storehouse, for flow velocity
Called during test, so that the present apparatus can carry out flow-speed measurement to the various model Buchholz relays of various producers.
The above is only preferred embodiment of the present utility model, protection domain of the present utility model is not limited merely to above-mentioned
Embodiment, all technical schemes belonged under the utility model thinking belong to protection domain of the present utility model.It should be pointed out that right
For those skilled in the art, some improvements and modifications under the premise of the utility model principle is not departed from,
Should be regarded as protection domain of the present utility model.
Claims (5)
1. a kind of Buchholz relay flow velocity setting device, it is characterised in that including control unit (1) and pressure detecting assembly (2),
The pressure detecting assembly (2) is connected with described control unit (1), the process for pushing up open relay baffle plate (5) and open on top
Pressure of middle detection Buchholz relay baffle plate (5) when Buchholz relay grave gas are acted, and send to control unit (1), institute
Control unit (1) is stated for obtaining the flow speed value of Buchholz relay according to pressure signal.
2. Buchholz relay flow velocity setting device according to claim 1, it is characterised in that the pressure detecting assembly
(2) including probe (21) and pressure sensor (22), the probe (21) is connected with the pressure sensor (22), is opened for top
Catch and obtain pressure signal and send to pressure sensor (22).
3. Buchholz relay flow velocity setting device according to claim 2, it is characterised in that also including measurement column (23),
The measurement column (23) is provided with measured hole (24), the external diameter and the Buchholz relay of the measurement column (23) in the axial direction
Pipeline (4) internal diameter match, internal diameter and the external diameter of the probe (21) of the measurement column (23) match.
4. Buchholz relay flow velocity setting device as claimed in any of claims 1 to 3, it is characterised in that described
Pressure detecting assembly (2) passes sequentially through amplifying circuit and AD conversion module and is connected with described control unit (1).
5. Buchholz relay flow velocity setting device as claimed in any of claims 1 to 3, it is characterised in that described
Control unit (1) is connected with display unit (3), for being shown in real time to pressure signal or flow speed value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621302559.0U CN206258554U (en) | 2016-11-30 | 2016-11-30 | Buchholz relay flow velocity setting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621302559.0U CN206258554U (en) | 2016-11-30 | 2016-11-30 | Buchholz relay flow velocity setting device |
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| Publication Number | Publication Date |
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| CN206258554U true CN206258554U (en) | 2017-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621302559.0U Active CN206258554U (en) | 2016-11-30 | 2016-11-30 | Buchholz relay flow velocity setting device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106707147A (en) * | 2016-11-30 | 2017-05-24 | 国家电网公司 | Gas relay flow velocity setting device and method |
| CN111413601A (en) * | 2020-05-11 | 2020-07-14 | 国网陕西省电力公司电力科学研究院 | Overhead line partial discharge positioning device and positioning method based on ultrasonic array |
-
2016
- 2016-11-30 CN CN201621302559.0U patent/CN206258554U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106707147A (en) * | 2016-11-30 | 2017-05-24 | 国家电网公司 | Gas relay flow velocity setting device and method |
| CN106707147B (en) * | 2016-11-30 | 2024-04-09 | 国家电网公司 | Gas relay flow velocity setting device and method |
| CN111413601A (en) * | 2020-05-11 | 2020-07-14 | 国网陕西省电力公司电力科学研究院 | Overhead line partial discharge positioning device and positioning method based on ultrasonic array |
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