CN203981845U - Buchholz relay on-site calibration device - Google Patents

Buchholz relay on-site calibration device Download PDF

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Publication number
CN203981845U
CN203981845U CN201420387949.7U CN201420387949U CN203981845U CN 203981845 U CN203981845 U CN 203981845U CN 201420387949 U CN201420387949 U CN 201420387949U CN 203981845 U CN203981845 U CN 203981845U
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China
Prior art keywords
electromagnetic valve
buchholz relay
valve
control unit
pneumatic actuator
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Active
Application number
CN201420387949.7U
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Chinese (zh)
Inventor
朱立辉
戴缘生
童在林
袁志文
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State Grid Shanghai Electric Power Co Ltd
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State Grid Shanghai Electric Power Co Ltd
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Abstract

The utility model relates to a kind of Buchholz relay on-site calibration device, and it comprises communication control unit, and the 4th electromagnetic valve I V is also set, the 3rd electromagnetic valve II I, the second electromagnetic valve II, the first electromagnetic valve I, air-capacitor, retaining valve and air pump; Described air pump is connected with air-capacitor by retaining valve, and air-capacitor is connected with throttling valve by the 3rd electromagnetic valve II I, and throttling valve is connected with pneumatic actuator by the first electromagnetic valve I; The 3rd described electromagnetic valve II I is also connected with pneumatic actuator through the second electromagnetic valve II, and pneumatic actuator is connected with Buchholz relay; On the gas circuit pipeline being connected with pneumatic actuator in the first electromagnetic valve I, be provided with the second modular pressure II; In described air-capacitor, be provided with the first modular pressure I and the 4th electromagnetic valve I V.The utility model solves existing Buchholz relay oil stream correcting device heaviness, calibration cycle is longer, is unfavorable for the shortcoming of work on the spot; Effectively overcome the inexactness of traditional contact action test, the quick test in scene and the fault that realize Buchholz relay tentatively judge.

Description

Buchholz relay on-site calibration device
[technical field]
The utility model relates to Buchholz relay technical field, specifically, is a kind of Buchholz relay on-site calibration device.
[background technology]
Buchholz relay checking time is longer, owing to lacking, look into online the technological means that Gu Chu lacks, replies immediately soon labour, therefore be difficult to guarantee stop in short-term to complete verification during labour at main transformer, cause operating potential risk: may cause Buchholz relay to the action response of power transformer interior fault not in time, the consequences such as expansion accident scope.
Be subject to the limitation of prior art condition, substantially by offline mode, realize the verification of Buchholz relay, the problem of existence is mainly:
Problem 1: operating personnel must separate transformer body by Buchholz relay, takes back internal field checking table verification.Limitation due to dismounting transportation, causes check-verifying period longer.
Problem 2: checking table manual intervention link is more, and laboratory environment cannot copy relay actual operating conditions, and verification mobility consuming time is larger.
Problem 3: for fear of verify error, have repeatedly proof procedure repeatedly, cause delay and the out of true of verification used time.
[utility model content]
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of Buchholz relay on-site calibration device is provided.
The purpose of this utility model is achieved through the following technical solutions:
A Buchholz relay on-site calibration device, it comprises communication control unit, it is characterized in that, the 4th electromagnetic valve I V is also set, the 3rd electromagnetic valve II I, the second electromagnetic valve II, the first electromagnetic valve I, air-capacitor, retaining valve and air pump; Described air pump is connected with air-capacitor by retaining valve, and air-capacitor is connected with throttling valve by the 3rd electromagnetic valve II I, and throttling valve is connected with pneumatic actuator by the first electromagnetic valve I; The 3rd described electromagnetic valve II I is also connected with pneumatic actuator through the second electromagnetic valve II, and pneumatic actuator is connected with Buchholz relay; On the gas circuit pipeline being connected with pneumatic actuator in the first electromagnetic valve I, be provided with the second modular pressure II; In described air-capacitor, be provided with the first modular pressure I and the 4th electromagnetic valve I V.
The signal output part of the first described modular pressure I is connected with communication control unit, and the control end of the 4th described electromagnetic valve I V is connected with communication control unit.
The control end of the 3rd described electromagnetic valve II I is connected with communication control unit.
The first described electromagnetic valve I, the control end of the second electromagnetic valve II are connected respectively with communication control unit.
The signal output part of the second described modular pressure II is connected with communication control unit.
Described pneumatic actuator is connected with communication control unit by the signal output part of photoelectric detection system.
The control end of described air pump is connected with communication control unit.
The signal output part of described Buchholz relay is connected with communication control unit.
Described communication control unit is processed by computer data and is shown.
Described retaining valve, the first electromagnetic valve I, the second electromagnetic valve II, the 3rd electromagnetic valve II I is ripe product.
The first described modular pressure I, the second modular pressure II is ripe product.
The principle of work of this device:
(1) pre-pressure-controlled
By programmed control, close the 3rd electromagnetic valve II I and the 4th electromagnetic valve I V, open air pump power supply, gas flow is crossed retaining valve and is pressurizeed to air-capacitor, and pressure measuring value feeds back to controller by the first modular pressure I.When the force value receiving is during than the large 10kPa of precompressed setting value, close air pump power supply, by the 4th electromagnetic valve I V, regulate force value to reach precompressed setting value.
(2) piston is controlled
Open the first electromagnetic valve I, the second electromagnetic valve II and the 3rd electromagnetic valve II I, pneumatic actuator promotes forward piston, twice of initialization action.
(3) precompressed terminal number word the first modular pressure I calibration, the second modular pressure II calibration of tested terminal number word
Pre-pressure side is opened the 3rd electromagnetic valve II I output pressure, test side detected pressures added value, and the force value that high-low pressure cavity volume reduces and increases is equal, and the gaseous tension of exchange equals mobile force value in the solenoid valve opening time, and module completes self check.
(4) Output pressure is controlled
Open the first electromagnetic valve I, the second electromagnetic valve II and the 3rd electromagnetic valve II I, pneumatic actuator travels forward, and sets throttle valve opening to the Output pressure of 1.2kPa/s.By regulating the dutycycle open soon the 3rd electromagnetic valve II I, in dutycycle is the continuous time of 1 (high level), open solenoid valve and change the pressure reduction between high-low pressure cavity volume.Dutycycle is 0 o'clock shut electromagnetic valve.For example the control cycle of fast open electromagnetic valve is 10ms, and dutycycle is to represent that solenoid valve leaves 5ms at 0.5 o'clock, closes 5ms.High pressure cavity volume flows to low pressure cavity volume certain gas flow by solenoid valve at 5ms in the time, realizes the control to gas pressure change in low pressure cavity volume.
Compared with prior art, good effect of the present utility model is:
The utility model solves existing Buchholz relay oil stream correcting device heaviness, calibration cycle is longer, is unfavorable for the shortcoming of work on the spot.
The utility model effectively overcomes the inexactness of traditional contact action test, and the quick test in scene and the fault that realize Buchholz relay tentatively judge.
After device development of the present utility model completes, chamber checking and on-the-spot test show that this device is applicable to the field calibration of Buchholz relay action definite value, contact same period to test by experiment.In addition, by the research to this device, we are greatly improved for the technical capability of verification transformer non-electric quantity protection this respect, to the safe operation of electrical network, provide technical support.
[accompanying drawing explanation]
Fig. 1 structured flowchart of the present utility model.
[embodiment]
The embodiment of a kind of Buchholz relay on-site calibration device of the utility model is below provided.
Embodiment 1
Refer to accompanying drawing 1, a kind of Buchholz relay on-site calibration device, it comprises communication control unit, it is characterized in that, the 4th electromagnetic valve I V is also set, the 3rd electromagnetic valve II I, the second electromagnetic valve II, the first electromagnetic valve I, air-capacitor, retaining valve and air pump; Described air pump is connected with air-capacitor by retaining valve, and air-capacitor is connected with throttling valve by the 3rd electromagnetic valve II I, and throttling valve is connected with pneumatic actuator by the first electromagnetic valve I; The 3rd described electromagnetic valve II I is also connected with pneumatic actuator through the second electromagnetic valve II, and pneumatic actuator is connected with Buchholz relay; On the gas circuit pipeline being connected with pneumatic actuator in the first electromagnetic valve I, be provided with the second modular pressure II; In described air-capacitor, be provided with the first modular pressure I and the 4th electromagnetic valve I V.
The signal output part of the first described modular pressure I is connected with communication control unit, and the control end of the 4th described electromagnetic valve I V is connected with communication control unit.
The control end of the 3rd described electromagnetic valve II I is connected with communication control unit.
The first described electromagnetic valve I, the control end of the second electromagnetic valve II are connected respectively with communication control unit.
The signal output part of the second described modular pressure II is connected with communication control unit.
Described pneumatic actuator is connected with communication control unit by the signal output part of photoelectric detection system.
The control end of described air pump is connected with communication control unit.
The signal output part of described Buchholz relay is connected with communication control unit.
Described communication control unit is processed by computer data and is shown.
Described retaining valve, the first electromagnetic valve I, the second electromagnetic valve II, the 3rd electromagnetic valve II I is ripe product.
The first described modular pressure I, the second modular pressure II is ripe product.
The principle of work of this device:
(1) pre-pressure-controlled
By programmed control, close the 3rd electromagnetic valve II I and the 4th electromagnetic valve I V, open air pump power supply, gas flow is crossed retaining valve and is pressurizeed to air-capacitor, and pressure measuring value feeds back to controller by the first modular pressure I.When the force value receiving is during than the large 10kPa of precompressed setting value, close air pump power supply, by the 4th electromagnetic valve I V, regulate force value to reach precompressed setting value.
(2) piston is controlled
Open the first electromagnetic valve I, the second electromagnetic valve II and the 3rd electromagnetic valve II I, pneumatic actuator promotes forward piston, twice of initialization action.
(3) precompressed terminal number word the first modular pressure I calibration, the second modular pressure II calibration of tested terminal number word
Pre-pressure side is opened the 3rd electromagnetic valve II I output pressure, test side detected pressures added value, and the force value that high-low pressure cavity volume reduces and increases is equal, and the gaseous tension of exchange equals mobile force value in the solenoid valve opening time, and module completes self check.
(4) Output pressure is controlled
Open the first electromagnetic valve I, the second electromagnetic valve II and the 3rd electromagnetic valve II I, pneumatic actuator travels forward, and sets throttle valve opening to the Output pressure of 1.2kPa/s.By regulating the dutycycle open soon the 3rd electromagnetic valve II I, in dutycycle is the continuous time of 1 (high level), open solenoid valve and change the pressure reduction between high-low pressure cavity volume.Dutycycle is 0 o'clock shut electromagnetic valve.For example the control cycle of fast open electromagnetic valve is 10ms, and dutycycle is to represent that solenoid valve leaves 5ms at 0.5 o'clock, closes 5ms.High pressure cavity volume flows to low pressure cavity volume certain gas flow by solenoid valve at 5ms in the time, realizes the control to gas pressure change in low pressure cavity volume.
Implementation result: adaptability and the reliability of installing in experimental enviroment are at the scene best
Piston variation of friction factor in course of action causes there is certain influence starting the calibration initial stage, through test: piston is through 2 actions, and this variation can be reduced to below 2%.Throttle valve opening can be set gaseous tension and be output as 1.2kPa/s, and now the repdocutbility of measurement result is best, and namely the consistance of measurement result is best.
The above is only preferred implementation of the present utility model; it should be pointed out that for those skilled in the art, without departing from the concept of the premise utility; can also make some improvements and modifications, these improvements and modifications also should be considered as in protection domain of the present utility model.

Claims (8)

1. a Buchholz relay on-site calibration device, it comprises communication control unit, it is characterized in that, the 4th solenoid valve IV is also set, the 3rd solenoid valve III, the second solenoid valve II, the first solenoid valve I, air-capacitor, retaining valve and air pump; Described air pump is connected with air-capacitor by retaining valve, and air-capacitor is connected with throttling valve by the 3rd solenoid valve III, and throttling valve is connected with pneumatic actuator by the first solenoid valve I; The 3rd described solenoid valve III is also connected with pneumatic actuator through the second solenoid valve II, and pneumatic actuator is connected with Buchholz relay; On the gas circuit pipeline being connected with pneumatic actuator in the first solenoid valve I, be provided with the second modular pressure II; In described air-capacitor, be provided with the first modular pressure I and the 4th solenoid valve IV.
2. a kind of Buchholz relay on-site calibration device as claimed in claim 1, is characterized in that, the signal output part of the first described modular pressure I is connected with communication control unit, and the control end of the 4th described solenoid valve IV is connected with communication control unit.
3. a kind of Buchholz relay on-site calibration device as claimed in claim 1, is characterized in that, the control end of the 3rd described solenoid valve III is connected with communication control unit.
4. a kind of Buchholz relay on-site calibration device as claimed in claim 1, is characterized in that, the first described solenoid valve I, the control end of the second electromagnetic valve II are connected respectively with communication control unit.
5. a kind of Buchholz relay on-site calibration device as claimed in claim 1, is characterized in that, the signal output part of the second described modular pressure II is connected with communication control unit.
6. a kind of Buchholz relay on-site calibration device as claimed in claim 1, is characterized in that, described pneumatic actuator is connected with communication control unit by the signal output part of photoelectric detection system.
7. a kind of Buchholz relay on-site calibration device as claimed in claim 1, is characterized in that, the control end of described air pump is connected with communication control unit.
8. a kind of Buchholz relay on-site calibration device as claimed in claim 1, is characterized in that, the signal output part of described Buchholz relay is connected with communication control unit.
CN201420387949.7U 2014-07-14 2014-07-14 Buchholz relay on-site calibration device Active CN203981845U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201420387949.7U CN203981845U (en) 2014-07-14 2014-07-14 Buchholz relay on-site calibration device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201420387949.7U CN203981845U (en) 2014-07-14 2014-07-14 Buchholz relay on-site calibration device

Publications (1)

Publication Number Publication Date
CN203981845U true CN203981845U (en) 2014-12-03

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Application Number Title Priority Date Filing Date
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Country Status (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108375727A (en) * 2018-03-20 2018-08-07 国家电投集团河南电力有限公司技术信息中心 A kind of gas-actuated relay calibration stand and its method of calibration
CN109709478A (en) * 2018-12-27 2019-05-03 渤海造船厂集团有限公司 A kind of adjustment method of batch pressure switch

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108375727A (en) * 2018-03-20 2018-08-07 国家电投集团河南电力有限公司技术信息中心 A kind of gas-actuated relay calibration stand and its method of calibration
CN109709478A (en) * 2018-12-27 2019-05-03 渤海造船厂集团有限公司 A kind of adjustment method of batch pressure switch

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