CN110726510A - Hydraulic mechanism capable of checking pressure gauge without power outage and checking method thereof - Google Patents
Hydraulic mechanism capable of checking pressure gauge without power outage and checking method thereof Download PDFInfo
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- CN110726510A CN110726510A CN201910833099.6A CN201910833099A CN110726510A CN 110726510 A CN110726510 A CN 110726510A CN 201910833099 A CN201910833099 A CN 201910833099A CN 110726510 A CN110726510 A CN 110726510A
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- pressure gauge
- switch valve
- pressure
- checking
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L27/00—Testing or calibrating of apparatus for measuring fluid pressure
- G01L27/002—Calibrating, i.e. establishing true relation between transducer output value and value to be measured, zeroing, linearising or span error determination
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Abstract
The invention discloses a hydraulic mechanism capable of checking a pressure gauge without power outage and a checking method thereof, wherein the hydraulic mechanism comprises a low-pressure oil tank and a high-pressure system which are connected through an oil conveying pipeline, the pressure gauge is installed on the oil conveying pipeline, a first switch valve is installed on the oil conveying pipeline of the pressure gauge and the high-pressure system, a second switch valve is installed on the oil conveying pipeline between the pressure gauge and the low-pressure oil tank, a checking connecting pipe is connected on the oil conveying pipeline between the first switch valve and the second switch valve, and a third switch valve is installed on the checking connecting pipe. The pressure gauge can be checked in a non-power-off state, the pressure gauge does not need to be disassembled and assembled, and checking efficiency is improved.
Description
Technical Field
The invention relates to the technical field of circuit breakers, in particular to a circuit breaker hydraulic mechanism capable of checking a pressure gauge without power outage and a checking method thereof.
Background
The hydraulic mechanism has the advantages of large operating power and stable operation, is generally applied to 220kV and above high-voltage circuit breakers, and is generally provided with pressure gauges for monitoring the pressure of the whole hydraulic mechanism in real time so as to ensure the use safety; this manometer needs regularly to develop the check-up work, need during the check-up have a power failure with the circuit breaker, and the manometer is pulled down after release hydraulic pressure mechanism pressure, installs the manometer again after the check-up is accomplished. The manometer check-up work efficiency of current circuit breaker hydraulic pressure mechanism is low, and dismouting work is troublesome, and equipment power off time is long, if the installation quality is not good still can cause the joint oil leakage, influences the normal work of circuit breaker.
Disclosure of Invention
The invention aims to provide a hydraulic mechanism capable of checking a pressure gauge without power outage and a checking method thereof, which well solve the problems, can check the pressure gauge without power outage, does not need to disassemble and assemble the pressure gauge, and improves the checking efficiency.
The hydraulic mechanism comprises a low-pressure oil tank and a high-pressure system which are connected through an oil conveying pipeline, wherein the oil conveying pipeline is provided with a pressure gauge, a first switch valve is arranged on the oil conveying pipeline between the pressure gauge and the high-pressure system, a second switch valve is arranged on the oil conveying pipeline between the pressure gauge and the low-pressure oil tank, a checking connecting pipe is connected on the oil conveying pipeline between the first switch valve and the second switch valve, and a third switch valve is arranged on the checking connecting pipe.
The pressure gauge calibration method based on the hydraulic mechanism capable of calibrating the pressure gauge without power outage is further provided, and comprises the following steps:
1) closing the first switch valve and the third switch valve, opening the second switch valve, and releasing the residual hydraulic oil in the oil conveying pipeline;
2) closing the first switch valve, the second switch valve and the third switch valve, connecting the pressure gauge calibration device with the calibration connecting pipe, and opening the third switch valve to calibrate the pressure gauge;
3) and after the pressure gauge is checked, closing the third switch valve, removing the pressure gauge checking device, and opening the first switch valve and the second switch valve for resetting.
The invention has the beneficial effects that:
1. the invention is refitted on the oil pipeline between the low-pressure oil tank and the high-pressure system of the existing circuit breaker hydraulic mechanism, the whole structure of the existing hydraulic mechanism is not changed, the structure is simple, the pressure gauge on the hydraulic mechanism can be conveniently checked, the circuit breaker is not required to be powered off, the pressure gauge is not required to be disassembled, the checking efficiency is improved, the operation is convenient, the oil leakage of a pressure gauge joint is not caused, and the use is safe and reliable;
2. the pressure gauge calibration method is based on a hydraulic mechanism capable of calibrating the pressure gauge without power failure, the calibration of the pressure gauge can be completed only by sequentially switching a plurality of switch valves and connecting a calibration device, the equipment does not need to be powered off, the pressure gauge can be calibrated on line without being detached, the operation is simple and reasonable, the calibration is accurate, and the efficiency is high.
Drawings
FIG. 1 is a schematic view of a first embodiment of the present invention;
FIG. 2 is a schematic view of a second embodiment of the present invention;
FIG. 3 is a schematic flow diagram of the process of the present invention;
in the figure: 1. an oil pipeline; 2. a low-pressure oil tank; 3. a high pressure system; 4. a pressure gauge; 5. a first on-off valve; 6. a second on-off valve; 7. checking and taking over; 8. a third on-off valve; 9. a calibration device joint; 10. a dust plug; 11. a filter; 12. and connecting a nut.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", etc. indicate orientations or positional relationships based on those shown in the drawings or orientations or positional relationships that the products of the present invention conventionally use, which are merely for convenience of description and simplification of description, but do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The first embodiment is as follows: as shown in fig. 1, the invention provides a hydraulic mechanism capable of checking a pressure gauge without power outage, which comprises a low-pressure oil tank 2 and a high-pressure system 3 which are connected through an oil pipeline 1, wherein the oil pipeline 1 is provided with a pressure gauge 4, the oil pipeline 1 between the pressure gauge 4 and the high-pressure system 3 is provided with a first switch valve 5, the oil pipeline 1 between the pressure gauge 4 and the low-pressure oil tank 2 is provided with a second switch valve 6, the oil pipeline 1 between the first switch valve 5 and the second switch valve 6 is connected with a checking connection pipe 7, and the checking connection pipe 7 is provided with a third switch valve 8.
The low-voltage oil tank 2 and the high-voltage system 3 are both parts in the existing circuit breaker hydraulic system, and the pressure gauge 4 is mainly used for detecting the real-time pressure of the hydraulic mechanism during working so that an operator can know the working state of the hydraulic mechanism. The conventional calibration method needs the whole hydraulic mechanism to be shut down and closed, then the pressure gauge 4 is disassembled, as the condition of oil leakage is easy to occur when the pressure gauge 4 is disassembled, the loss of hydraulic oil is caused, the pressure of the whole hydraulic mechanism is reduced, in order to ensure the normal operation of the hydraulic mechanism, the hydraulic mechanism can be supplemented subsequently, and is positioned in a narrow space in a mechanism box, when the pressure gauge 4 is disassembled and assembled, the operation is very inconvenient, the oil leakage is very easy, the environment is polluted, and if the operation is carried out under the condition that a breaker is electrified, a very large potential safety hazard exists, so the operation of the pressure gauge 4 is carried out under the condition of power failure, the safety is ensured under the condition of power failure, the normal use of equipment is influenced, and the working efficiency is reduced; and dust, impurities and the like are easy to leak into the oil conveying pipeline 1, so that the hydraulic oil is polluted. When the pressure gauge 4 needs to be checked, an operator only needs to switch the three switch valves in sequence and connect the checking device to complete the checking of the pressure gauge 4, the whole breaker does not need to be powered off, and the pressure gauge 4 does not need to be dismounted. The operation of operating personnel in the mechanism case is just carried out the switch of three ooff valve, and calibration equipment's installation is on calibration takeover 7, and calibration takeover 7 has certain length, and exists alone, compares with dismantling manometer 4 on defeated oil pipe way 1, and it is more convenient to operate, can not have the condition of oil leakage oil, and after the operating space increase, also reduced the condition that potential safety hazard and dust impurity leaked into.
And a checking device joint 9 is arranged on the checking connecting pipe 7. The checking device connector 9 is matched with the checking device, and an existing quick connector such as a quick connector with a connecting nut 12 can be adopted, so that the checking device is very convenient to disassemble and assemble. Be provided with dustproof stopper 10 on the calibration equipment connects 9, dustproof stopper 10 seals calibration equipment connects 9 when not carrying out the calibration of manometer 4, prevents that dust etc. from getting into the calibration takeover 7, when needing to install the calibration equipment, only need take off dustproof stopper 10 can, dustproof stopper 10 generally is the metal end cap of plastics material or threaded.
Manometer 4 installs on defeated oil pipe way 1 through coupling nut 12, and coupling nut 12 makes things convenient for the installation of manometer 4 to dismantle the change, is convenient for operate in the narrow and small space of mechanism case.
The first switch valve 5, the second switch valve 6 and the third switch valve 8 are all pressure valves, and the oil pipeline 1 is also a pressure pipeline. The whole hydraulic mechanism has certain pressure, so the oil pipeline 1 and the switch valve have certain pressure, and compared with a common valve, the pressure valve has better pressure resistance.
In the second embodiment, as shown in fig. 2, in the first embodiment, the oil delivery pipe 1 between the first on-off valve 5 and the low-pressure oil tank 2 is higher than the highest position of the low-pressure oil tank 2. The check connection pipe 7 is higher than the highest position of the low-pressure oil tank 2. When carrying out the 4 verifications of manometer, need release remaining hydraulic oil in the defeated oil pipe way 1 earlier, hydraulic oil can flow towards low-pressure fuel tank 2 under the effect of pressure and gravity, in order to make hydraulic oil flow rapider and more thorough, set up the defeated oil pipe way 1 between being less than first ooff valve 5 and second ooff valve 6 with the position of low-pressure fuel tank 2, the position of low-pressure fuel tank 2 is also less than verification takeover 7 simultaneously, make things convenient for hydraulic oil in defeated oil pipe way 1 between first ooff valve 5 and the second ooff valve 6 and the verification takeover 7 to flow into in low-pressure fuel tank 2.
Install filter 11 on the check-up takeover 7, filter the hydraulic oil in the check-up takeover 7 of filter 11 front end, nearly check-up device joint 9 end promptly, prevent that the dust impurity that produces or bring into when the check-up device is installed from entering into defeated oil pipe way 1 and going, has avoided the pollution of hydraulic oil.
As shown in fig. 3, the present invention further provides a pressure gauge calibration method for a hydraulic mechanism based on a pressure gauge that can be calibrated without power outage, comprising the steps of:
1) closing the first switch valve and the third switch valve, opening the second switch valve, and releasing the hydraulic oil remained in the oil pipeline into the low-pressure oil tank;
2) after the residual hydraulic oil in the oil pipeline is discharged, closing the first switch valve, the second switch valve and the third switch valve, connecting the pressure gauge calibration device with the calibration connecting pipe, and opening the third switch valve to calibrate the pressure gauge;
3) and after the pressure gauge is checked, closing the third switch valve, removing the pressure gauge checking device, and opening the first switch valve and the second switch valve for resetting.
That is, when the hydraulic mechanism is operating normally, the first and second switching valves are in the open state, and the third switching valve is in the closed state. In the step 3), the second switch valve is opened first, then the first switch valve is opened, and when the first switch valve is opened, the speed is slow as much as possible, so that the pressure gauge is prevented from being damaged due to the fact that hydraulic oil in a high-pressure system quickly impacts the pressure gauge in a high-pressure state.
The pressure gauge calibration method is based on a hydraulic mechanism capable of calibrating the pressure gauge without power failure, the calibration of the pressure gauge can be completed only by sequentially switching a plurality of switch valves and connecting a calibration device, the equipment does not need to be powered off, the pressure gauge can be calibrated on line without being detached, the operation is simple and reasonable, the calibration is accurate, and the efficiency is high. And the hydraulic oil in the hydraulic mechanism can not be lost, the pressure of the whole hydraulic mechanism can not be reduced, and the influence on the normal work of the circuit breaker is avoided.
The present invention is capable of other embodiments, and various changes and modifications may be made by one skilled in the art without departing from the spirit and scope of the invention.
Claims (10)
1. The utility model provides a hydraulic pressure mechanism that can check-up manometer not have a power failure, includes low-pressure fuel tank (2) and high-pressure system (3) connected through defeated oil pipe way (1), its characterized in that: install manometer (4) on defeated oil pipe way (1), install first ooff valve (5) on defeated oil pipe way (1) between manometer (4) and high-pressure system (3), install second ooff valve (6) on defeated oil pipe way (1) between manometer (4) and low-pressure fuel tank (2), be connected with check-up takeover (7) on defeated oil pipe way (1) between first ooff valve (5) and second ooff valve (6), install third ooff valve (8) on check-up takeover (7).
2. The hydraulic mechanism capable of checking the pressure gauge without power outage as claimed in claim 1, wherein: and a checking device joint (9) is arranged on the checking connecting pipe (7).
3. The hydraulic mechanism capable of checking the pressure gauge without power outage as claimed in claim 1, wherein: and a dustproof plug (10) is arranged on the checking device joint (9).
4. The hydraulic mechanism capable of checking the pressure gauge without power outage as claimed in claim 1, wherein: and a filter (11) is arranged on the verification connecting pipe (7).
5. The circuit breaker hydraulic mechanism of claim 1 for checking the pressure gauge (4) without power outage, characterized in that: the pressure gauge (4) is arranged on the oil pipeline (1) through a connecting nut (12).
6. The hydraulic mechanism capable of checking the pressure gauge without power outage as claimed in claim 1, wherein: the first switch valve (5), the second switch valve (6) and the third switch valve (8) are all pressure valves.
7. The hydraulic mechanism capable of checking the pressure gauge without power outage as claimed in claim 1, wherein: and the oil conveying pipeline (1) between the first switch valve (5) and the low-pressure oil tank (2) is higher than the highest position of the low-pressure oil tank (2).
8. The hydraulic mechanism capable of checking the pressure gauge without power outage as claimed in claim 1, wherein: the check connecting pipe (7) is higher than the highest position of the low-pressure oil tank (2).
9. A pressure gauge verification method for a circuit breaker hydraulic mechanism based on claims 1-8, characterized by comprising the steps of:
1) closing the first switch valve and the third switch valve, opening the second switch valve, and releasing the residual hydraulic oil in the oil conveying pipeline;
2) closing the first switch valve, the second switch valve and the third switch valve, connecting the pressure gauge calibration device with the calibration connecting pipe, and opening the third switch valve to calibrate the pressure gauge;
3) and after the pressure gauge is checked, closing the third switch valve, removing the pressure gauge checking device, and opening the first switch valve and the second switch valve for resetting.
10. The pressure gauge verifying method of a circuit breaker hydraulic mechanism according to claim 9, characterized in that: in step 3), the second switch valve is opened first, and then the first switch valve is opened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910833099.6A CN110726510A (en) | 2019-09-04 | 2019-09-04 | Hydraulic mechanism capable of checking pressure gauge without power outage and checking method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910833099.6A CN110726510A (en) | 2019-09-04 | 2019-09-04 | Hydraulic mechanism capable of checking pressure gauge without power outage and checking method thereof |
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| CN110726510A true CN110726510A (en) | 2020-01-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910833099.6A Pending CN110726510A (en) | 2019-09-04 | 2019-09-04 | Hydraulic mechanism capable of checking pressure gauge without power outage and checking method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110600295A (en) * | 2019-09-05 | 2019-12-20 | 贵州电网有限责任公司 | Breaker hydraulic mechanism capable of disassembling and assembling pressure gauge under pressure and disassembling and assembling method thereof |
| CN112665782A (en) * | 2020-12-16 | 2021-04-16 | 国网冀北电力有限公司检修分公司 | Gas pressure online monitoring system and online monitoring method |
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| CN106952754A (en) * | 2017-04-18 | 2017-07-14 | 中国西电电气股份有限公司 | Energy charging device for breaker hydraulic actuating mechanism |
| CN208568163U (en) * | 2018-08-24 | 2019-03-01 | 红旗仪表（长兴）有限公司 | A kind of high pressure automated calibration equipment |
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2019
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| CN2051735U (en) * | 1989-04-18 | 1990-01-24 | 沈坚持 | Pressure gauge, oxygen gauge, checker |
| CN2533460Y (en) * | 2002-03-01 | 2003-01-29 | 太原振北实业开发总公司 | Electric manometer checker |
| CN2854793Y (en) * | 2005-11-25 | 2007-01-03 | 新东北电气(沈阳)高压开关有限公司 | Hydraulic operation mechanism for high tension circuit breaker |
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| CN202471350U (en) * | 2012-01-18 | 2012-10-03 | 国电大渡河瀑布沟发电有限公司 | Three-way pressure checking apparatus |
| CN203009460U (en) * | 2012-11-27 | 2013-06-19 | 荥阳市电业局 | Uninterruptible power supply overhaul device for hydraulic pressure gauge |
| CN103268843A (en) * | 2013-05-30 | 2013-08-28 | 谈行 | Hydraulic operating mechanism for breaker |
| CN106952754A (en) * | 2017-04-18 | 2017-07-14 | 中国西电电气股份有限公司 | Energy charging device for breaker hydraulic actuating mechanism |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110600295A (en) * | 2019-09-05 | 2019-12-20 | 贵州电网有限责任公司 | Breaker hydraulic mechanism capable of disassembling and assembling pressure gauge under pressure and disassembling and assembling method thereof |
| CN110600295B (en) * | 2019-09-05 | 2021-03-30 | 贵州电网有限责任公司 | Breaker hydraulic mechanism capable of disassembling and assembling pressure gauge under pressure and disassembling and assembling method thereof |
| CN112665782A (en) * | 2020-12-16 | 2021-04-16 | 国网冀北电力有限公司检修分公司 | Gas pressure online monitoring system and online monitoring method |
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Application publication date: 20200124 |