CN201732147U - General checking device for gas relay - Google Patents
General checking device for gas relay Download PDFInfo
- Publication number
- CN201732147U CN201732147U CN2010202480890U CN201020248089U CN201732147U CN 201732147 U CN201732147 U CN 201732147U CN 2010202480890 U CN2010202480890 U CN 2010202480890U CN 201020248089 U CN201020248089 U CN 201020248089U CN 201732147 U CN201732147 U CN 201732147U
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- gas
- gas relay
- testing tube
- relay
- measured
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- 238000005259 measurement Methods 0.000 claims description 12
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound data:image/svg+xml;base64,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 data:image/svg+xml;base64,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 C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 7
- 239000002828 fuel tank Substances 0.000 claims description 6
- 230000003028 elevating Effects 0.000 claims description 4
- 238000001514 detection method Methods 0.000 abstract description 5
- 238000007789 sealing Methods 0.000 description 4
- 239000007788 liquid Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000000875 corresponding Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 235000015927 pasta Nutrition 0.000 description 1
- 230000001681 protective Effects 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
Abstract
The utility model discloses a general checking device for a gas relay, which comprises a heavy gas flow velocity testing oil circuit formed by connecting an oil tank, an oil pump controlled by a frequency converter, a flowmeter, a left electric valve, a clamping mechanism fixed end, a left testing pipe, a relay of gas to be tested, a right testing pipe, a hydraulic measuring cylinder, a hydraulic clamping mechanism and a right electric valve in series, wherein two ends of the right electric valve are parallelly connected with branch oil circuits formed by a pressure sensor, a solenoid valve and a measuring pump; the left testing pipe and the right testing pipe are respectively movably sheathed and connected with the clamping mechanism fixed end and the hydraulic measuring cylinder; and a spigot of the clamping mechanism fixed end and the left testing pipe, the left testing pipe and one end of the relay of gas to be tested, the other end of the relay of gas to be tested and the right testing pipe, and the right pipe and a spigot of the hydraulic measuring cylinder are respectively connected in a sealed way. By replacing the left testing pipe and the right testing pipe, the general checking device for the gas relay can check and set gas relays of various types and various calibers, the detection is accurate and reliable, the operation is simple and convenient, and the working efficiency is high.
Description
Technical field
The utility model relates to the calibration equipment of gas relay, especially relates to the general calibration equipment of a kind of gas relay.
Background technology
Gas relay is widely used the oil-filled transformer of doing electric system and the protective device of oil immersed type load ratio bridging switch.When breaking down and make oil decomposition produce gas or when causing the impulsion of oil stream, alerting signal is sent in the contact action of gas relay immediately, and connects control loop, excises faulty equipment automatically, makes causality loss drop to minimum in transformer or load ratio bridging switch inside.The gas relay calibration equipment is the isolated plant of gas relay heavy gas flow speed value and light methane gas volumetric values that detects and adjust.Existing gas relay calibration equipment mainly contains: 1, adopt the gas relay calibration equipment of conversion pressure flow velocity method, this device is to be placed more small-bore test pipeline by the verification gas relay, make gas relay inside be full of test(ing) medium, in the test pipeline of gas relay one end, apply certain pressure, open the valve on the test pipeline that is communicated with the gas relay other end then, this moment is because the effect of pipeline inner pressure can produce temporary impact oil stream flows through from gas relay inside, and gas pressure value is converted into flow velocity, to realize detecting the purpose of flow speed value, this kind gas relay calibration equipment shortcoming is can only detection by quantitative, measuring accuracy is poor, the test process complexity is loaded down with trivial details, usable range is little, the gas relay of 25 calibers can only be detected, and the parameter value of tested gas relay need be known; 2, adopt the gas relay calibration equipment of actual flow velocity detection method, this device is the test pipeline that will be placed by the verification gas relay with its identical bore, regulate then and flow through by the flow velocity of verification gas relay oil, to realize detecting the purpose of flow speed value, this kind gas relay calibration equipment shortcoming is the equipment heaviness, bulky, the gas relay of different bores need adopt different test pipelines, system complex, an equipment can't satisfy the verification of existing gas relay, if tested gas relay remodeling or also need device hardware is improved when new product occurring has limited the adaptability of device; 3, adopt the gas relay calibration equipment of spring tension method, this device is to measure Buchholz relay baffle plate operating pressure value, and calculate flow velocity setting valve with its relay automatically, this kind gas relay calibration equipment shortcoming is to pull down the gas relay core, after the installation because gas relay core shift in position, the data of measuring have not been real data, in addition since measure be the Buchholz relay action time spring pressure, and the impact of oil stream is the baffle plate of gas relay, the baffle plate lifting surface area difference of each gas relay, so the data of measuring are extremely inaccurate, running into two ball float gas relays can't verification.
The utility model content
The purpose of this utility model is to provide a kind of gas relay general calibration equipment, the gas relay of can detect and adjust various models, various bores, and it is accurate, reliable, easy and simple to handle to detect, high efficiency.
For achieving the above object, the utility model can be taked following technical proposals:
The general calibration equipment of the utility model gas relay, comprise the heavy gas flow speed test oil loop that oil pump, flowmeter, left motorized valve, clamp system fixed end, left testing tube, gas relay to be measured, right testing tube, hydraulic measurement cylinder, hydraulic clamp mechanism, right motorized valve and above-mentioned fuel tank by fuel tank, Frequency Converter Control connect and compose successively, be parallel with an oil circuit that is used for light methane gas volumetric values test that constitutes by pressure transducer, solenoid valve and volume pump at described right motorized valve two ends; Described left and right testing tube is actively socketed on respectively in clamp system fixed end and the hydraulic measurement cylinder, the seam and the left testing tube of described clamp system fixed end are tightly connected, one port of left side testing tube and described gas relay to be measured directly matches and is tightly connected, the other end bore of this gas relay to be measured and right testing tube match and are tightly connected, and the seam of this right side testing tube and described hydraulic measurement cylinder is tightly connected.
Between the seam and left testing tube of described clamp system fixed end, between the other end and right testing tube of an end of left testing tube and described gas relay to be measured, this gas relay to be measured, be provided with O-ring seal between the seam of this right side testing tube and described hydraulic measurement cylinder.
Described gas relay to be measured below is provided with elevating mechanism.
Above-mentioned each technical scheme is equipped with computer control system, and this computer control system is electrically connected with described oil pump, frequency converter, flowmeter, left motorized valve, right motorized valve, hydraulic clamp mechanism, pressure transducer, solenoid valve and volume pump respectively.
Advantage of the present utility model is: only by changing and the corresponding left and right testing tube of gas relay bore to be measured the gas relay of just can detect and adjust various models, various bores; Adopt hydraulic clamp mechanism, rapid operation saves time, stressed evenly, high efficiency, labour intensity be low; Adopt the oil stream output of Frequency Converter Control oil pump, the oily flow velocity degree that flows through gas relay to be measured is gradually changed, gas relay action mechanism when producing fault that analogue transformer or load ratio bridging switch are inner improves the checking precision of gas relay greatly; By the keying of control motorized valve, solenoid valve, can realize the verification of the heavy gas flow speed value to gas relay, light methane gas volumetric values and sealing property, each test event can independently be finished respectively, is independent of each other; Adopt computer control, the detection that is provided with according to the user requires to finish automatically the detection and the experiments of sealing performance of gas relay, has thoroughly solved in the past by manually reading the low problem of measuring accuracy that gas relay numerical value to be measured causes.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Fig. 2 is the syndeton synoptic diagram at Fig. 1 gas relay to be measured two ends.
Fig. 3 is a fundamental diagram of the present utility model.
Embodiment
As shown in Figure 1 to Figure 3, the general calibration equipment of gas relay described in the utility model, comprise the heavy gas flow speed test oil loop that oil pump 2, flowmeter 3, left motorized valve 41, clamp system fixed end 5, left testing tube 61, gas relay to be measured 7, right testing tube 62, hydraulic measurement cylinder 8, hydraulic clamp mechanism, right motorized valve 42 and above-mentioned fuel tank 1 by fuel tank 1, Frequency Converter Control connect and compose successively, be parallel with an oil circuit that is used for light methane gas volumetric values test that constitutes by pressure transducer 9, solenoid valve 10 and volume pump 11 at described right motorized valve 42 two ends.Described left and right testing tube 61,62 is actively socketed on respectively in clamp system fixed end 5 and the hydraulic measurement cylinder 8, the seam of described clamp system fixed end 5 and left testing tube 61 are tightly connected by O-ring seal, one port of left side testing tube 61 and described gas relay 7 to be measured directly matches and is tightly connected by O-ring seal, the other end bore of this gas relay 7 to be measured and right testing tube 62 match and are tightly connected by O-ring seal, and this right side testing tube 62 is tightly connected by O-ring seal with the seam of described hydraulic measurement cylinder 8.Below described gas relay 7 to be measured, be provided with screw lifting mechanism 12, be used to adjust the setting height(from bottom) of gas relay 7 to be measured.Computer control system is electrically connected with above-mentioned oil pump 2, frequency converter, flowmeter 3, left motorized valve 41, right motorized valve 42, hydraulic clamp mechanism, pressure transducer 9, solenoid valve 10 and volume pump 11 respectively.
The step that the utility model detects heavy gas flow speed value is: select left testing tube 61 and the right testing tube 62 consistent with gas relay 7 bores to be measured for use, be set in the clamp system fixed end 5 and in the hydraulic measurement cylinder 8, gas relay 7 to be measured is placed on the elevating mechanism 12, adjusting elevating mechanism 12 makes gas relay to be measured 7 bore centers consistent with the center of left testing tube 61 and right testing tube 62, seal the interface at gas relay to be measured 7 two ends with O-ring seal, and clamp this survey gas relay 7 by computer system control hydraulic clamp mechanism.Computer control system control is opened right motorized valve 42, is closed solenoid valve 10, and the oil stream that passes through Frequency Converter Control oil pump 2 is exported, the oily flow velocity degree that flows through gas relay 7 to be measured is increased gradually by 0, and gather flow velocity signal in real time, when oily flow velocity degree makes gas relay 7 to be measured weigh the gas closing of contact, computer control system receives heavy gas actuating signal, and control oil pump 2 stops, and the flow speed value that closing of contact moment collects is heavy gas flow speed value.
The step that the utility model detects light methane gas volumetric values is: gas relay 7 to be measured is installed in the test oil circuit by above-mentioned steps, make oil circuit and gas relay to be measured 7 inside be full of oil, close right motorized valve 42 by computer control system, open solenoid valve 10, start volume pump 11, detect and show the liquid volume of volume pump 11 discharges in real time, when gas relay 7 inner chamber pastas to be measured drop to when making the light gas closing of contact, computer control system receives light gas actuating signal, control volume pump 11 stops, and the liquid volume value that closing of contact moment collects is light methane gas volumetric values.
The utility model detects the step of sealing property: gas relay 7 to be measured is installed in the heavy gas flow speed test oil circuit by above-mentioned steps, make oil circuit and gas relay to be measured 7 inside be full of oil, close right motorized valve 5 by computer control system, open solenoid valve 10, start volume pump 11 and give the liquid supercharging, and by pressure transducer 9 real-time signal piping pressure and demonstration in real time, when line pressure reaches predefined pressure, close solenoid valve 10 and volume pump 11, system enters packing state, pressurize is finished at the fixed time, whether computer control system writes down the original pressure value automatically and finishes force value, qualified in order to the sealing property of judging gas relay to be measured.
Claims (4)
1. general calibration equipment of gas relay, it is characterized in that: comprise by fuel tank (1), the oil pump of Frequency Converter Control (2), flowmeter (3), left side motorized valve (41), clamp system fixed end (5), left side testing tube (61), gas relay to be measured (7), right testing tube (62), hydraulic measurement cylinder (8), hydraulic clamp mechanism, the heavy gas flow speed test oil loop that right motorized valve (42) and above-mentioned fuel tank (1) connect and compose successively is parallel with by pressure transducer (9) at described right motorized valve (42) two ends, the oil circuit that is used for light methane gas volumetric values test that solenoid valve (10) and volume pump (11) constitute; Described left and right testing tube (61,62) is actively socketed on respectively in clamp system fixed end (5) and the hydraulic measurement cylinder (8), the seam of described clamp system fixed end (5) and left testing tube (61) are tightly connected, one port of left side testing tube (61) and described gas relay to be measured (7) directly matches and is tightly connected, the other end bore of this gas relay to be measured (7) and right testing tube (62) match and are tightly connected, and this right side testing tube (62) is tightly connected with the seam of described hydraulic measurement cylinder (8).
2. the general calibration equipment of gas relay according to claim 1 is characterized in that: between the seam of described clamp system fixed end (5) and the left testing tube (61), between the other end and right testing tube (62) of an end of left testing tube (61) and described gas relay to be measured (7), this gas relay to be measured (7), be provided with O-ring seal between the seam of this right side testing tube (62) and described hydraulic measurement cylinder (8).
3. the general calibration equipment of gas relay according to claim 1 is characterized in that: described gas relay to be measured (7) below is provided with elevating mechanism (12).
4. according to claim 1 or the general calibration equipment of 2 or 3 described gas relays, it is characterized in that: be provided with computer control system, this computer control system is electrically connected with described oil pump (2), frequency converter, flowmeter (3), left and right sides motorized valve (41,42), hydraulic clamp mechanism, pressure transducer (9), solenoid valve (10) and volume pump (11) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202480890U CN201732147U (en) | 2010-07-06 | 2010-07-06 | General checking device for gas relay |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010202480890U CN201732147U (en) | 2010-07-06 | 2010-07-06 | General checking device for gas relay |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201732147U true CN201732147U (en) | 2011-02-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010202480890U Expired - Fee Related CN201732147U (en) | 2010-07-06 | 2010-07-06 | General checking device for gas relay |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201732147U (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322979A (en) * | 2011-09-14 | 2012-01-18 | 郑州赛奥电子股份有限公司 | Temperature check table |
| CN102620895A (en) * | 2012-03-21 | 2012-08-01 | 重庆市电力公司电力科学研究院 | Device and method for seal test of floating ball type gas relay |
| CN102889906A (en) * | 2012-10-17 | 2013-01-23 | 冉正华 | Single-pipe gas relay detecting bench, centering clamping mechanism and detection method thereof |
| CN103344910A (en) * | 2013-06-25 | 2013-10-09 | 刘赵 | Gas relay check meter |
| CN106019136A (en) * | 2016-07-06 | 2016-10-12 | 国家电网公司 | Method for verifying gas relay flow velocity value by replacing oil medium with gas medium |
| CN106679892A (en) * | 2016-11-30 | 2017-05-17 | 国家电网公司 | Gas relay leakproofness detection device |
| 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 |
| WO2020051961A1 (en) * | 2018-09-13 | 2020-03-19 | 广州供电局有限公司 | Transformer simulation system and setting value simulation measurement method |
| CN111473368A (en) * | 2019-01-24 | 2020-07-31 | 圣炉(深圳)贸易有限公司 | Safety device for gas stove |
-
2010
- 2010-07-06 CN CN2010202480890U patent/CN201732147U/en not_active Expired - Fee Related
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322979A (en) * | 2011-09-14 | 2012-01-18 | 郑州赛奥电子股份有限公司 | Temperature check table |
| CN102322979B (en) * | 2011-09-14 | 2012-12-05 | 郑州赛奥电子股份有限公司 | Temperature check table |
| CN102620895A (en) * | 2012-03-21 | 2012-08-01 | 重庆市电力公司电力科学研究院 | Device and method for seal test of floating ball type gas relay |
| CN102620895B (en) * | 2012-03-21 | 2014-12-10 | 重庆市电力公司电力科学研究院 | Device for seal test of floating ball type gas relay |
| CN102889906A (en) * | 2012-10-17 | 2013-01-23 | 冉正华 | Single-pipe gas relay detecting bench, centering clamping mechanism and detection method thereof |
| CN102889906B (en) * | 2012-10-17 | 2014-07-02 | 冉正华 | Single-pipe gas relay detecting bench, centering clamping mechanism and detection method thereof |
| CN103344910A (en) * | 2013-06-25 | 2013-10-09 | 刘赵 | Gas relay check meter |
| CN103344910B (en) * | 2013-06-25 | 2015-08-12 | 刘赵 | Buchholz relay check meter |
| CN106019136A (en) * | 2016-07-06 | 2016-10-12 | 国家电网公司 | Method for verifying gas relay flow velocity value by replacing oil medium with gas medium |
| CN106019136B (en) * | 2016-07-06 | 2018-10-26 | 国家电网公司 | Gas medium replaces the method that oil medium verifies gas relay flow velocity value |
| CN106679892A (en) * | 2016-11-30 | 2017-05-17 | 国家电网公司 | Gas relay leakproofness detection device |
| 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 |
| WO2020051961A1 (en) * | 2018-09-13 | 2020-03-19 | 广州供电局有限公司 | Transformer simulation system and setting value simulation measurement method |
| US11309703B2 (en) | 2018-09-13 | 2022-04-19 | Guangzhou Power Supply Co., Ltd. | Transformer simulation system, and simulation and measurement method for setting value |
| CN111473368A (en) * | 2019-01-24 | 2020-07-31 | 圣炉(深圳)贸易有限公司 | Safety device for gas stove |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110202 Termination date: 20170706 |