CN110783135B - Maintenance oil tank of hydraulic mechanism of circuit breaker and method for searching frequent pressure of hydraulic mechanism using oil tank - Google Patents
Maintenance oil tank of hydraulic mechanism of circuit breaker and method for searching frequent pressure of hydraulic mechanism using oil tank Download PDFInfo
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- CN110783135B CN110783135B CN201810858021.5A CN201810858021A CN110783135B CN 110783135 B CN110783135 B CN 110783135B CN 201810858021 A CN201810858021 A CN 201810858021A CN 110783135 B CN110783135 B CN 110783135B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/28—Power arrangements internal to the switch for operating the driving mechanism
- H01H33/30—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator
- H01H33/34—Power arrangements internal to the switch for operating the driving mechanism using fluid actuator hydraulic
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Abstract
The invention discloses a maintenance oil tank of a hydraulic mechanism of a circuit breaker, which comprises an oil tank body and a connecting flange, wherein the oil tank body is made of transparent materials, the upper part of the oil tank body is provided with an opening, the flange is positioned on the periphery of the top of the oil tank body, and the flange and the oil tank body are of an integral structure. A method for searching for the pressure frequency of a hydraulic mechanism for overhauling an oil tank enables the hydraulic mechanism to visually check each internal element under a pressure state, directly search for defects, perform key inspection on key parts, eliminate the defects, save a large amount of time and greatly improve the overhauling efficiency.
Description
Technical Field
The invention relates to the field of fault detection of high-voltage circuit breakers, in particular to a maintenance oil tank of a hydraulic mechanism of a circuit breaker and a method for searching the frequent pressing frequency of the hydraulic mechanism using the oil tank.
Background
The rapid development of socio-economic results in the increasing demand for power systems and the increasing demand for energy, which puts more stringent demands on the stability and economy of power systems.
A power circuit breaker is a breaking device of a power line. The hydraulic mechanism of the power circuit breaker is a main part of the power circuit breaker. The circuit breaker hydraulic mechanism is in a high hydraulic state inside during operation, so that the oil leakage phenomenon of a high-pressure pipeline easily exists, the circuit breaker hydraulic mechanism is pressed frequently, the circuit breaker cannot be opened and closed normally, and the stability of an electric power system is influenced.
The frequent circuit breaker hydraulic mechanism that suppresses is the common trouble of circuit breaker, can cause the operating pressure unstability of circuit breaker hydraulic mechanism, makes the unable normal divide-shut brake of circuit breaker, influences electric power system's stability. The frequent pressing of the hydraulic mechanism is mainly caused by poor sealing of all sealing parts of the mechanism, and the specific parts are difficult to find due to more sealing parts and more complex structures, so that the time spent on the specific parts is longer, and the requirement on power supply reliability cannot be met.
Since the oil leakage position is mostly present in the oil tank and is sealed in the working state, it is difficult to find a specific leakage position. In order to eliminate defects, a step-by-step repair method is adopted for fault removal at present, namely, after equipment is powered off and a mechanism releases pressure to detach an oil tank of the mechanism, all high-voltage pipelines in the oil tank are decomposed and inspected comprehensively. The working method has the advantages of large workload, high cost, unclear working focus, long working time and influence on the reliable operation of equipment.
Chinese patent document No. CN 106128855 a discloses an oil leakage inspection device for a high-voltage circuit of a hydraulic circuit breaker, which comprises a box-type body, an oil level gauge installed on one side wall of the body for measuring the height of an oil level, and an observation window arranged on the side wall of the body for observing the internal condition of the body; the bottom of the body is connected with an oil valve for filling and discharging oil through an oil pipe; the top of the body is provided with a detachable top cover which can be opened so as to put in the hydraulic mechanism of the circuit breaker; the observation window is arranged on the other side wall adjacent to or opposite to the side wall of the oil level indicator, and the rubber pad and the cover plate are fixed on the side wall in a sealing way through bolts; the bottom of the body is provided with a stainless steel plate supporting seat, and four bottom corners are provided with fixing bolt holes; the normal pressurizing of the oil pump is simulated, and after the pressurizing is finished, the leakage detection can be carried out on each sealing valve port, so that the FX22 switch high-pressure loop leaks oil, the leakage detection can be carried out on each sealing valve port after the pressurizing, and the leakage detection can be observed at the closing position after the processing. However, in the invention, after oil is drained completely, the fixing bolt is loosened, and the observation windows on two sides are opened to observe the hydraulic mechanism of the circuit breaker, so that time and labor are wasted in maintenance.
Chinese patent document with an authorization bulletin number of CN 205992499U discloses a high-voltage vacuum circuit breaker, wherein, high-voltage vacuum circuit breaker includes spring mechanism box, the intercommunication has a plurality of cylindricality insulating housing on the spring mechanism box, be provided with vacuum interrupter in the cylindricality insulating housing, quiet conducting rod one end runs through line terminal is connected to vacuum interrupter's upper end, the other end, moves conducting rod one end and runs through line terminal under vacuum interrupter's lower extreme, other end connection, vacuum interrupter's outside parcel has the translucent cover, the translucent cover inner wall with vacuum interrupter's outer wall encloses mutually and closes and form airtight space, just airtight space intussuseption is filled with coloured gas, be provided with the access switch door on the cylindricality insulating housing. The problem of general vacuum circuit breaker all be airtight, hardly overhaul the vacuum interrupter of inside, observe whether its inside vacuum state is destroyed is solved. The utility model discloses a whether change observation vacuum interrupter is airtight through coloured gas colour in the airtight space, does not solve the method of seeking the frequent reason of hydraulic pressure mechanism suppress.
Disclosure of Invention
In view of the above, the present invention provides a maintenance oil tank for a hydraulic mechanism of a circuit breaker and a method for searching for a hydraulic mechanism using the oil tank that is pressed frequently, so that the hydraulic mechanism can visually check each internal element in a pressed state, directly search for defects, perform key inspection on key parts, eliminate defects, save a lot of time, and greatly improve maintenance efficiency.
In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a circuit breaker hydraulic mechanism overhauls oil tank, includes oil tank body and flange, the oil tank body is made for transparent material, oil tank body upper portion opening, the flange is located around the oil tank body top, the flange with oil tank body structure as an organic whole.
As a preferable structure of the invention, the oil tank body and the connecting flange are made of organic glass.
As a preferable structure of the invention, the oil tank body and the connecting flange are made of toughened glass.
As a preferable structure of the invention, the oil tank body and the connecting flange are made of transparent glass fiber reinforced plastics.
As a preferred structure of the invention, the inner surface of the oil tank body is provided with a wiping strip which is a long-strip-shaped magnet embedded by rubber, two ends of the wiping strip are provided with a first hook, the inner surface of the oil tank body is provided with a first arc-shaped cross rod, and the first hook is sleeved on the first cross rod and can slide on the first cross rod; the handle that sets up and clean the supporting of strip in the oil tank body outside, the handle is also by rubber embedding's rectangular shape magnet, and the handle shape is unanimous with cleaning the strip, and both ends set up couple two, and the handle outside sets up the handle, and the oil tank body outside sets up arc horizontal pole two, and couple two covers just can slide on the horizontal pole on horizontal pole two.
A method for searching for frequent pressing of a hydraulic mechanism comprises the following steps:
1) reducing the pressure in the hydraulic mechanism to zero, and then removing the original oil tank;
2) installing an overhaul oil tank;
3) starting an oil pump, pressurizing to 5MP, keeping for 3 minutes, directly observing a check valve, a primary valve and a secondary valve through an overhaul oil tank, checking whether abnormal phenomena exist or not, treating the poor sealing part if abnormal phenomena such as leakage exist, and continuing pressurization testing if abnormal phenomena do not exist;
4) continuously and gradually boosting the pressure, repeating the step 3 to complete the inspection under each pressure, and marking the part with poor sealing;
5) replacing a sealing ring or a fastening screw and the like on the part which is not tightly sealed according to the maintenance process, and eliminating defects;
6) re-detecting the sealing performance of each sealing part until all pressure relief fault points are eliminated;
7) and (4) dismantling the maintenance oil tank, and reinstalling the original oil tank of the hydraulic mechanism to finish other auxiliary operations of maintenance.
Furthermore, the flange connection positions of the overhaul oil tank and the original oil tank are the same.
Further, the step-by-step pressure increasing process is divided into pressure stages of 10MP, 15MP, 25MP, 30MP and 35MP, and the checking step 3 is repeated in sequence.
Furthermore, the inspection of the next higher pressure stage can be carried out after the fault point of the previous pressure stage is inspected, the inspection oil tank is detached before boosting each time after the fault point is repaired, the surfaces of the check valve, the primary valve and the secondary valve are wiped, residual oil stains are wiped, and the inspection oil tank is installed again on the premise that oil leakage is observed without being influenced.
The invention has the beneficial effects that:
1. the inspection oil tank is transparent, so that the internal elements can be seen clearly from the outside, defects can be directly searched, and the defects are eliminated. Such as: the device has the advantages that bubbles, pressure relief and the like can be easily found, the high-pressure pipelines in the oil tank are not required to be comprehensively decomposed and inspected, time and labor are saved, the overhauling efficiency is greatly improved, and the cost is reduced.
2. The oil tank body and the connecting flange are made of organic glass and have good transparency, chemical stability, mechanical property and weather resistance.
3. The oil tank body and the connecting flange are made of toughened glass, and have the advantages of high strength, strong impact resistance and good thermal stability.
4. The oil tank body and the connecting flange are made of transparent glass fiber reinforced plastics, the transparent glass fiber reinforced plastics are produced by completely soaking glass fibers with resin without adding any filler, and the oil tank is transparent in appearance and has the advantages of light weight, high mechanical strength, good insulativity, corrosion resistance and the like.
5. The overhaul oil tank has light weight, high strength and certain transparency, and can be easily installed.
6. When the method is adopted to overhaul the hydraulic mechanism of the circuit breaker, the overhaul oil tank plays a role in protecting a human body, high-pressure oil is prevented from being sprayed onto the human body, and the overhaul oil tank has an insulation protection function.
7. The maintenance process of the hydraulic mechanism has high requirement and high maintenance difficulty. The sealing ring is replaced in the maintenance process, even if the sealing ring is carefully replaced, the sealing ring can be damaged, and the maintenance is not successful. Therefore, the maintenance principle of the hydraulic mechanism is that the parts with good performance can be kept as original as possible without moving, and the increase of workload is avoided. By adopting the method of the invention to overhaul the hydraulic mechanism of the circuit breaker, the usage amount of a large number of sealing rings can be reduced, and the material is saved. And the problem position can be directly determined by direct observation, and the workload is greatly reduced.
8. The method is an innovation of a construction method, the traditional working method is comprehensive maintenance, the method is to quickly determine the position of a defect under pressure and then locally maintain, the maintenance precision and quality are higher, the safety of the method is high, and the method is verified on a plurality of sites.
9. The method is applied to a 220KV transformer substation through preliminary estimation, and the maintenance cost saved within 5 years is about 800 ten thousand yuan.
10. The gradual pressure increasing process is divided into pressure stages of 10MP, 15MP, 25MP, 30MP and 35MP, the checking step 3 is repeated in sequence, the pressure is increased in stages, each pressure stage is kept for 3 minutes, fault points are fully confirmed, and the accuracy of the checking result is ensured.
11. The utility model discloses an oil tank body, including oil tank body, mailbox body, accessible operating handle, magnetic force, the mailbox body internal surface is sheltered from the sight and is observed that the oil tank body internal surface sets up and cleans strip and handle, cleans strip and handle and make by the magnet of rubber embedding, and accessible operating handle utilizes magnetic force to drive and cleans the strip and clean the oil tank body internal surface, prevents that the oil spout from splashing mailbox body internal surface and.
Drawings
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a diagram illustrating a fourth embodiment of the present invention;
FIG. 3 is a schematic top view of an embodiment of the present invention with four openings;
FIG. 4 is a schematic view of the handle structure;
reference numbers in the figures: 1-oil tank body, 2-flange, 3-wiping strip, 4-rubber, 5-magnet, 6-first hook, 7-first cross rod, 8-handle, 9-second hook, 10-handle, 11-second cross rod and 12-top cover.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Example one
As shown in figure 1, a circuit breaker hydraulic mechanism overhauls oil tank, includes oil tank body 1 and flange 2, the oil tank body is made for organic glass, has better transparency, chemical stability, mechanical properties and weatherability. The fuel tank comprises a fuel tank body, wherein the upper part of the fuel tank body is provided with an opening, a flange 2 is positioned at the top of the fuel tank body 1, and the flange 2 and the fuel tank body 1 are of an integral structure.
The overhaul oil tank has light weight, high strength, transparency and easy observation and can be easily installed. Because the oil tank body 1 for overhauling the oil tank is transparent, each internal element can be seen clearly from the outside, the defect can be directly found, and the working method of the defect is eliminated. Such as: the device has the advantages that bubbling, pressure relief and the like can be easily found, the high-pressure pipelines of the pressing mechanism in the oil tank are not required to be comprehensively decomposed and checked, time and labor are saved, the overhauling efficiency is greatly improved, and the cost is reduced.
A method for searching for frequent pressing of a hydraulic mechanism comprises the following steps:
1) reducing the pressure in the hydraulic mechanism to zero, and then removing the original oil tank;
2) installing an overhaul oil tank;
3) starting an oil pump, pressurizing to 5MP, keeping for 3 minutes, directly observing a check valve, a primary valve and a secondary valve through an overhaul oil tank, checking whether abnormal phenomena exist or not, treating the poor sealing part if abnormal phenomena such as leakage exist, and continuing pressurization testing if abnormal phenomena do not exist;
4) continuously and gradually boosting the pressure, repeating the step 3 to complete the inspection under each pressure, and marking the part with poor sealing;
5) replacing a sealing ring or a fastening screw and the like on the part which is not tightly sealed according to the maintenance process, and eliminating defects;
6) re-detecting the sealing performance of each sealing part until all pressure relief fault points are eliminated;
7) and (4) dismantling the maintenance oil tank, and reinstalling the original oil tank of the hydraulic mechanism to finish other auxiliary operations of maintenance.
The connection position of the maintenance oil tank and the flange 2 of the original oil tank is the same, and the maintenance oil tank and the top cover 12 of the hydraulic mechanism of the circuit breaker are stably connected.
When the method is adopted to overhaul the hydraulic mechanism of the circuit breaker, the overhaul oil tank plays a role in protecting a human body, high-pressure oil is prevented from being sprayed onto the human body, and the overhaul oil tank has an insulation protection function.
The maintenance process of the hydraulic mechanism has high requirement and high maintenance difficulty. The sealing ring is replaced in the maintenance process, even if the sealing ring is carefully replaced, the sealing ring can be damaged, and the maintenance is not successful. Therefore, the maintenance principle of the hydraulic mechanism is that the parts with good performance can be kept as original as possible without moving, and the increase of workload is avoided. By adopting the method of the invention to overhaul the hydraulic mechanism of the circuit breaker, the usage amount of a large number of sealing rings can be reduced, and the material is saved. And the problem position can be directly determined by direct observation, and the workload is greatly reduced.
The gradual pressure increasing process is divided into pressure stages of 10MP, 15MP, 25MP, 30MP and 35MP, the checking step 3 is repeated in sequence, the pressure is increased in stages, each pressure stage is kept for 3 minutes, fault points are fully confirmed, and the accuracy of the checking result is ensured.
And after the fault point of the previous pressure stage is repaired, the next higher pressure stage can be checked, the repair oil tank is detached before boosting every time after the fault point is repaired, the surfaces of the check valve, the primary valve and the secondary valve are wiped to ensure that residual oil stains are wiped off, and the repair oil tank is installed again on the premise that oil leakage is not influenced.
The traditional working method is comprehensive maintenance, the method is to quickly determine the position of a defect under pressure and then locally maintain, the maintenance precision and quality are higher, the safety of the method is high, and the method is verified on a plurality of sites.
The method is applied to a 220KV transformer substation through preliminary estimation, and the maintenance cost saved within 5 years is 800 ten thousand yuan.
Example two
The structure and method of this embodiment are basically the same as those of the first embodiment, and the difference is that: the oil tank body 1 and the connecting flange 2 are made of toughened glass, and have the advantages of high strength, strong impact resistance and good thermal stability.
EXAMPLE III
The structure and method of this embodiment are basically the same as those of the first embodiment, and the difference is that: the oil tank body 1 and the connecting flange 2 are made of transparent glass fiber reinforced plastics, the transparent glass fiber reinforced plastics are produced by completely soaking glass fibers with resin without adding any filler, and the oil tank is transparent in appearance and has the advantages of light weight, high mechanical strength, good insulativity, corrosion resistance and the like.
Example four
As shown in fig. 2-4, the structure and method of the present embodiment are substantially the same as those of the first embodiment, and the difference is that: the inner surface of the oil tank body 1 is provided with a wiping strip 3, the wiping strip 3 is a long-strip-shaped magnet 5 embedded by rubber 4, two ends of the wiping strip 3 are provided with a first hook 6, the inner surface of the oil tank body is provided with a first arc-shaped cross rod 7, and the first hook 6 is sleeved on the first cross rod 7 and can slide on the first cross rod 7; the handle 8 that sets up and clean the supporting handle 8 of strip 3 in the 1 outside of oil tank body, handle 8 is also by rubber embedding's rectangular shape magnet, and the handle 8 shape is unanimous with cleaning strip 3, and both ends set up couple two 9, and the handle 8 outside sets up handle 10, and the 1 outside of oil tank body sets up arc horizontal pole two 11, and couple two 9 covers on horizontal pole two 11 and can slide on horizontal pole two 11. The first cross rod 7 and the second cross rod 11 are fixedly connected with the oil tank body through short rods.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent substitutions made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.
Claims (4)
1. A method for searching the frequent pressing frequency of a hydraulic mechanism for overhauling an oil tank of a circuit breaker comprises the following steps:
1) reducing the pressure in the hydraulic mechanism to zero, and then removing the original oil tank;
2) installing an overhaul oil tank;
3) starting an oil pump, pressurizing to 5MP, keeping for 3 minutes, directly observing a check valve, a primary valve and a secondary valve through an overhaul oil tank, checking whether an abnormal phenomenon exists, if leakage is abnormal, treating a poor sealing part, and if the abnormal phenomenon exists, continuing pressurization testing;
4) continuously and gradually boosting the pressure, repeating the step 3 to complete the inspection under each pressure, and marking the part with poor sealing;
5) replacing a sealing ring or a fastening screw for the part with poor sealing according to the maintenance process to eliminate the defects;
6) re-detecting the sealing performance of each sealing part until all pressure relief fault points are eliminated;
7) dismantling the maintenance oil tank, and reinstalling the original oil tank of the hydraulic mechanism to finish other auxiliary operations of maintenance;
the overhaul oil tank comprises an oil tank body and a connecting flange, wherein the oil tank body is made of transparent materials, the upper portion of the oil tank body is provided with an opening, the flange is located at the top of the oil tank body, and the flange and the oil tank body are of an integrated structure.
2. The lookup method as claimed in claim 1 wherein: the oil tank body and the connecting flange are made of organic glass.
3. The lookup method as claimed in claim 1 wherein: the oil tank body and the connecting flange are made of toughened glass.
4. The lookup method as claimed in claim 1 wherein: the oil tank body and the connecting flange are made of transparent glass fiber reinforced plastics.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810858021.5A CN110783135B (en) | 2018-07-31 | 2018-07-31 | Maintenance oil tank of hydraulic mechanism of circuit breaker and method for searching frequent pressure of hydraulic mechanism using oil tank |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810858021.5A CN110783135B (en) | 2018-07-31 | 2018-07-31 | Maintenance oil tank of hydraulic mechanism of circuit breaker and method for searching frequent pressure of hydraulic mechanism using oil tank |
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| CN110783135A CN110783135A (en) | 2020-02-11 |
| CN110783135B true CN110783135B (en) | 2021-06-29 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USH1832H (en) * | 1996-06-03 | 2000-02-01 | The United States Of America As Represented By The Secretary Of The Army | Electromagnetically transparent fluidic operators for remote operation of electric switches and method of adapting electric switches for remote, fluidic operation |
| CN201188052Y (en) * | 2008-04-14 | 2009-01-28 | 唐山轨道交通装备有限责任公司 | Device for testing transformer wholly |
| CN201297166Y (en) * | 2008-11-27 | 2009-08-26 | 中国海洋石油总公司 | Movable multifunctional hydraulic test system |
| CN202370941U (en) * | 2011-12-30 | 2012-08-08 | 黑龙江省电力有限公司哈尔滨超高压公司 | Test platform for spare part of hydraulic switching mechanism |
| CN202974571U (en) * | 2012-11-09 | 2013-06-05 | 嘉兴电力局 | Oil leak checking device for high-voltage circuit of hydraulic mechanism's breaker |
-
2018
- 2018-07-31 CN CN201810858021.5A patent/CN110783135B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| USH1832H (en) * | 1996-06-03 | 2000-02-01 | The United States Of America As Represented By The Secretary Of The Army | Electromagnetically transparent fluidic operators for remote operation of electric switches and method of adapting electric switches for remote, fluidic operation |
| CN201188052Y (en) * | 2008-04-14 | 2009-01-28 | 唐山轨道交通装备有限责任公司 | Device for testing transformer wholly |
| CN201297166Y (en) * | 2008-11-27 | 2009-08-26 | 中国海洋石油总公司 | Movable multifunctional hydraulic test system |
| CN202370941U (en) * | 2011-12-30 | 2012-08-08 | 黑龙江省电力有限公司哈尔滨超高压公司 | Test platform for spare part of hydraulic switching mechanism |
| CN202974571U (en) * | 2012-11-09 | 2013-06-05 | 嘉兴电力局 | Oil leak checking device for high-voltage circuit of hydraulic mechanism's breaker |
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| CN110783135A (en) | 2020-02-11 |
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