CN108375727A - A kind of gas-actuated relay calibration stand and its method of calibration - Google Patents
A kind of gas-actuated relay calibration stand and its method of calibration Download PDFInfo
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- CN108375727A CN108375727A CN201810229578.2A CN201810229578A CN108375727A CN 108375727 A CN108375727 A CN 108375727A CN 201810229578 A CN201810229578 A CN 201810229578A CN 108375727 A CN108375727 A CN 108375727A
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- China
- Prior art keywords
- relay
- working connection
- oil
- gas
- buchholz relay
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/327—Testing of circuit interrupters, switches or circuit-breakers
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- General Physics & Mathematics (AREA)
- Loading And Unloading Of Fuel Tanks Or Ships (AREA)
Abstract
The application discloses a kind of gas-actuated relay calibration stand, including clamping device, further includes the both ends for being connected to the clamping device, for the working connection for Buchholz relay fuel feeding；Both ends are connected on the working connection, the heated oil for heating the working connection fluid；One end is connected on the working connection, for that vacuum can vacuumize oil circuit in gas extraction relay.Since the oil liquid temperature for flowing through Buchholz relay on the working connection can be heated to consistent with set temperature by the heated oil, avoid causing error because of oil temperature difference；Again since the oil circuit that vacuumizes can first check the damaged degree of float before hollow float formula Buchholz relay carries out pressure test, to eliminate influence of the float breakage to pressure test result.Therefore, gas-actuated relay calibration stand provided by the present application can effectively improve the accuracy of Buchholz relay associated check result.Disclosed herein as well is a kind of methods of calibration of gas-actuated relay calibration stand.
Description
Technical field
The present invention relates in emergency protective device field, more particularly to a kind of gas-actuated relay calibration stand.The present invention also relates to
And a kind of method of calibration of gas-actuated relay calibration stand.
Background technology
Buchholz relay is the main protection element of power transformer interior fault, is usually mounted to transformer body and oil conservater
Between connecting pipe on.When inside transformer occur turn-to-turn and layer short circuit, iron core failure, inside pipe casing failure, in winding
Energy sensitive action when the failures such as portion's broken string and insulation degradation and pasta decline, the internal gas generated or fluid make gas relay
Device sends out alarm or tripping, and faulty equipment is cut off from power grid, reduces the generation of accident, is provided with and tries hard to keep to equipment safety operation
Barrier.Therefore, Buchholz relay is widely applied in electric system.
However, each electric power enterprise occurs to cause transformer to be jumped due to transformer body protection malfunction often in recent years
The failure of lock makes electric system and transformer reliability operation level be affected；Reflection is become because of gaseous shield simultaneously
The high sensitivity of the failure of depressor winding interturn short-circuit or built-in electrical insulation electric arc makes the workload of examination reason of false action increase.Watt
The setting valve of this relay is the important parameter for reacting protection malfunction, and when setting valve is too low, Buchholz relay is excessively clever
It is quick, then malfunction may occur, cause unnecessary power failure；When setting valve is excessively high, Buchholz relay sensitivity is poor, does not have
Protect the effect of transformer.Therefore, periodically Buchholz relay is verified, whether verification Buchholz relay is in appropriate setting valve
Lower action message just seems outstanding necessity.
Under normal conditions, capacity verification, flow rate verification, the pressure resistance of Buchholz relay are carried out on gas-actuated relay calibration stand
Experiment, but existing calibration equipment still has some shortcomings.
Such as, since the kinematic viscosity of transformer inner fluid is directly associated with temperature, same Buchholz relay is in difference
At a temperature of the acting characteristic setting valve that measures differ greatly, when especially being measured in the lower region of temperature, error bigger.
However, in existing checking procedure, but lack the control to oil liquid temperature, causes check results inaccurate.
For hollow float formula Buchholz relay, in pressure test, usually need first to vacuumize inside it
Then processing is re-filled with suitable with ensureing that its internal absolute pressure is not higher than a certain preset value in the case where maintaining vacuum state
Fluid reaches after certain pressure value measured pressure value again.However, existing checking table is but generally deficient of pumped vacuum systems, it can not
Exclude whether float is damaged in time, causes the pressure test result of hollow float Buchholz relay may be inaccurate.
Therefore, using existing gas-actuated relay calibration stand obtain each check results of Buchholz relay accuracy compared with
It is low.
Invention content
In view of this, the purpose of the present invention is to provide a kind of gas-actuated relay calibration stand, gas can be effectively improved
The accuracy of relay associated check result.Another object of the present invention is to provide a kind of verifications of gas-actuated relay calibration stand
Method.
Its concrete scheme is as follows：
Gas-actuated relay calibration stand provided herein includes the clamping device for fixing Buchholz relay, including：
It is connected to the both ends of the clamping device, for the working connection for Buchholz relay fuel feeding；
Both ends are connected on the working connection, the heated oil for heating the working connection fluid；
One end is connected on the working connection, for that vacuum can vacuumize oil circuit in gas extraction relay.
Preferably, further include：
Flow detector on the working connection, for detecting Buchholz relay flow.
Preferably, further include：
Pressure-detecting device on the working connection, for detecting Buchholz relay pressure.
Preferably, further include：
One end is connected on the working connection, the pressurized oil lines for pressurizeing to the working connection.
Preferably, the working connection includes：
Fuel tank for holding fluid；
Oil pump set on the side of the fuel tank, for driving fluid to flow；
Between the oil pump and the clamping device, for controlling fluid between the oil pump and the clamping device
First main switch of break-make；
Between the fuel tank and the clamping device, for controlling fluid between the fuel tank and the clamping device
Second main switch of break-make.
Preferably, further include：
One end is connected respectively with the working connection and the fuel tank, is examined for detecting the capacity of Buchholz relay capacity successively
Survey oil circuit.
Preferably, further include：
Respectively with the working connection, the heated oil, it is described vacuumize oil circuit, the pressurized oil lines and capacity check oil
Road be connected, the control device for controlling each oil circuit break-make respectively.
Preferably, the heated oil includes：
The first temperature-detecting device in the fuel tank, for detecting oil liquid temperature；
One end is connected between first main switch and the oil pump and the other end connects the fuel tank and described second
Between main switch, it is connected with first temperature-detecting device and is used to be sent according to first temperature-detecting device of reception
Signal heating fluid heating device；
It is installed in the heating device, the second temperature detection device for detecting the heating device internal temperature；
It is installed on the end of the heating device, opened for controlling the heating for the fluid break-make for flowing through the heating device
It closes.
Preferably, the oil circuit that vacuumizes includes：
Vacuum pump for extracting air in the Buchholz relay；
It is connected between the vacuum pump and the working connection, the vacuum switch for controlling the two break-make.
The method of calibration of gas-actuated relay calibration stand provided herein, includes the following steps：
Start gripping means grips Buchholz relay；
Start whether the first temperature-detecting device detection fuel tank inner fluid temperature is less than preset temperature value, if it is, opening
Dynamic heating devices heat working connection fluid；
The first main switch and the second main switch are opened, while starting oil pump, preheats working connection fluid；
Start the fluid flow that flow detector detection flows through Buchholz relay；
The first main switch and the second main switch are closed, starting capacity detects the capacity of oil circuit detection Buchholz relay；
Capacity check oil circuit is closed, opens the first main switch and the second main switch, while starting oil pump, working connection is full of oil
Liquid closes the first main switch and the second main switch；
When Buchholz relay to be detected be measuring cup type Buchholz relay when, start pressurized oil lines, until measuring cup type gas after
Pressure reaches the first preset pressure value in electric appliance, closes pressurized oil lines, and starts pressure-detecting device detection measuring cup type watt simultaneously
The pressure of this relay；
When this relay to be detected is hollow float formula Buchholz relay, first starting capacity detection oil circuit detection is hollow floating
Minor Buchholz relay capacity is closed until after the fluid capacity in hollow float formula Buchholz relay reaches preset capacity value
Capacity check oil circuit；Then start and vacuumize oil circuit, until vacuum degree reaches predetermined vacuum in hollow float formula Buchholz relay
Angle value, closing vacuumize oil circuit；Then the first main switch and the second main switch are opened again, while starting oil pump, and working connection is full of
Fluid closes the first main switch and the second main switch；Finally start pressurized oil lines, until hollow float formula Buchholz relay internal pressure
Power reaches the second preset pressure value, closes pressurized oil lines, and start simultaneously pressure-detecting device detection hollow float formula gas after
The pressure of electric appliance.
With respect to the background art, gas-actuated relay calibration stand provided by the present invention, including clamping device further include difference
It is connected to the both ends of the clamping device, for the working connection for Buchholz relay fuel feeding；Both ends are connected to the main oil
On the road, the heated oil for heating the working connection fluid；One end is connected on the working connection, for being capable of gas extraction
Vacuum vacuumizes oil circuit in relay.
On the one hand, since the working connection fluid can be heated to certain temperature by the heating device, naturally, can be into
Capacity verification, flow rate verification, the pressure test of Buchholz relay under row different temperatures, so as to the verification temperature of Buchholz relay
It is consistent with the oil temperature of transformer in actual electric network, to promote the accuracy of check results.
On the other hand, since the oil circuit that vacuumizes can make hollow float formula Buchholz relay before carrying out pressure test
The damaged degree for first checking float, to eliminate influence of the float breakage to pressure test result, to further improve verification
As a result accuracy.
Therefore, gas-actuated relay calibration stand provided by the present invention can effectively improve Buchholz relay associated check knot
The accuracy of fruit.
A kind of method of calibration of gas-actuated relay calibration stand provided by the present invention, advantageous effect having the same.
Description of the drawings
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technology description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
The embodiment of invention for those of ordinary skill in the art without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of structure schematic diagram of the provided gas-actuated relay calibration stand of specific embodiment of the present invention.
Reference numeral is as follows：
Clamping device 1, working connection 2, heated oil 3, vacuumize oil circuit 4, flow detector 5, pressure-detecting device 6,
Pressurized oil lines 7 and capacity check oil circuit 8；
Fuel tank 21, oil pump 22, the first main switch 23 and the second main switch 24；
First temperature-detecting device 31, heating device 32, the first heater switch 33, the second heater switch 34 and second temperature
Detection device 35；
Vacuum pump 41 and vacuum switch 42；
Air pump 71 and biased switch 72；
Second flowmeter 81, the first capacity check switch 82 and the second capacity check switch 83.
Specific implementation mode
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation describes, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In order to enable those skilled in the art to better understand the solution of the present invention, with reference to the accompanying drawings and detailed description
The present invention is described in further detail.
Referring to FIG. 1, structural representation letters of the Fig. 1 for a kind of provided gas-actuated relay calibration stand of specific embodiment of the present invention
Figure.
The embodiment of the invention discloses a kind of gas-actuated relay calibration stands, including clamping device 1, working connection 2, heated oil
3 and oil circuit 4 is vacuumized, further includes flow detector 5, pressure-detecting device 6, pressurized oil lines 7 and capacity check oil circuit 8.
Clamping device 1 can be one end fix, the movable frock clamp of the other end, using movable end relative to fixing end move
It moves to realize the clamping of Buchholz relay, certainly, the both ends of clamping device 1 can also be movable end.Correspondingly, dress is clamped
It sets 1 both ends to be respectively connected with the liquid flow channel for oil inside Buchholz relay, it by clamping device 1 is gas to facilitate working connection 2
Relay fuel feeding.
The both ends of working connection 2 are connected to the both ends of clamping device 1, are mainly used for as Buchholz relay fuel feeding.At this
In specific embodiment, working connection 2 includes fuel tank 21, oil pump 22, the first main switch 23 and the second main switch 24.
Wherein, fuel tank 21 is mainly used for holding fluid namely transformer oil.
Oil pump 22 is set to the side of fuel tank 21, specifically, is subject to 1 active view of attached drawing, and oil pump 22 can be set to fuel tank
21 left side is mainly used for driving fluid flowing it is of course also possible to set on the right side of fuel tank 21.Usually, on working connection 2 also
Motor for driving oil pump 22 to rotate is installed.
First main switch 23 is set between oil pump 22 and clamping device 1, be mainly used for control oil pump 22 and clamping device 1 it
Between fluid break-make.Second main switch 24 is set between fuel tank 21 and clamping device 1, is mainly used for controlling fuel tank 21 and is clamped dress
Set the break-make of fluid between 1.In this specific embodiment, the installation site of the first main switch 23 and the second main switch 24 can be mutual
It changes, and the two is preferably that motor-driven valve has no effect on realization it is of course also possible to be solenoid valve or other kinds of flow valve
The purpose of the present invention.
Specifically, fuel tank 21, oil pump 22, the first main switch 23, clamping device 1 and the second main switch 24 by pipeline successively
It is connected together to form closed circular oil circuit clockwise, which is just working connection 2.Certainly, the structure of working connection 2
It is without being limited thereto.
The both ends of heated oil 3 are connected on working connection 2, are mainly used for heating the fluid on working connection 2.In the tool
In body embodiment, heated oil 3 is located at the lower section of working connection 2, including the first temperature-detecting device 31, heating device 32, heating
Switch.
First temperature-detecting device 31 is set in fuel tank 21, mainly for detection of the temperature of 21 inner fluid of fuel tank.Specifically,
First temperature-detecting device 31 is specially temperature sensor, is certainly not limited to this.
One end of heating device 32 is connected between the first main switch 23 and oil pump 22 and the other end is connected to the second master and opens
It closes between 24 and fuel tank 21, specifically, heating device 32 is connected to by pipeline on working connection 2.It is apparent that going out in oil pump 22
The junction of hydraulic fluid port and heated oil 3 is equipped with three-way connection, to realize the connection of oil circuit between working connection 2 and heated oil 3；
Correspondingly, it also is provided in the oil inlet of fuel tank 21 and the junction of heated oil 3 for being connected to working connection 2 and heated oil 3
Three-way connection.Heating device 32 is connected with the first temperature-detecting device 31, and heating device 32 is examined according to the first temperature received
It surveys the signal that device 31 is sent and heats fluid.Heating device 32 includes heat medium, heating bath and heater, and heater heating is contained
The heat medium being put in heating bath, by heat exchange by the heat transfer of heat medium to the heating tube being positioned in heating bath
In road, to which heating flows through the fluid of heating pipe.Wherein, heat medium is specially tap water, certainly, without being limited thereto.It is worth
It is noted that being positioned over heating pipe in heating bath in the shape of a spiral, to increase heating surface (area) (HS, improves the efficiency of heating surface.Certainly, add
The structure of thermal 32 is without being limited thereto.
It is worth noting that, heating device 32 can also be substituted with refrigerating plant, for use in the fluid of working connection 2 is reduced
Temperature.
Heater switch is installed on heated oil 3, is mainly used to the fluid break-make that control flows through heating device 32, specifically,
Heating device includes first heater switch 33 and the second heater switch 34 at the both ends for being connected to heating device 32.Specifically
Ground, the first heater switch 33 and the second heater switch 34 can be motor-driven valve, it is of course also possible to be solenoid valve, hand-operated valve etc., and
It does not influence to achieve the object of the present invention.
In addition, heated oil 3 includes the second temperature detection device 35 being installed in the heating bath of heating device 32.Second
Temperature-detecting device 35 can be temperature sensor, mainly for detection of the temperature of heat medium in heating bath.Normally second
The heating temperature range of temperature-detecting device 35 is set as 0~90 DEG C, so as to when heat medium be heated to setting medium temperature when,
Stop heat medium.Certainly, second temperature detection device 35 can also be other temperature-detecting devices such as common thermometer, not
Influence achieves the object of the present invention.
It vacuumizes 4 one end of oil circuit to be connected on working connection 2, being mainly used for being capable of vacuum in gas extraction relay.At this
In body embodiment, it includes the vacuum pump 41 being connected by pipeline and vacuum switch 42 to vacuumize oil circuit 4.Vacuum pump 41 is mainly used
In air in gas extraction relay, so that Buchholz relay keeps certain vacuum degree before carrying out pressure test, to
Whether the float for facilitating deciding on hollow float formula Buchholz relay is damaged.Vacuum switch 42 is connected to vacuum pump 41 and main oil
Between road 2, it is mainly used for both control break-make.42 preferred motor-driven valve of vacuum switch, it is of course also possible to be solenoid valve or hand
Dynamic valve, has no effect on and achieves the object of the present invention.
Flow detector 5 is set on working connection 2, mainly for detection of the flow of Buchholz relay.In the specific implementation
In example, flow detector 5 is specially the first flowmeter being installed between the first main switch 23 and clamping device 1.Certainly, it flows
The installation site and type of amount detecting device 5 are not limited to this.It is worth noting that, when detecting the flow of Buchholz relay,
It must assure that fluid is full of working connection 2, the flow by detecting working connection 2 can detect the flow of Buchholz relay.
Pressure-detecting device 6 is set on working connection 2, mainly for detection of the pressure of Buchholz relay.In the specific implementation
In example, pressure-detecting device 6 is specially to be installed on the pressure gauge vacuumized between oil circuit 4 and capacity check oil circuit 8.Certainly, it presses
The installation site and type of force checking device 5 are also not limited to this.It is worth noting that, pressure-detecting device 6 is slightly above main oil
Road 2.
One end of pressurized oil lines 7 is connected on working connection 2, is mainly used for pressurizeing to working connection 2.In the specific embodiment
In, pressurized oil lines 7 include the air pump 71 being connected by pipeline and biased switch 72.Wherein, air pump 71 be mainly used for gas after
Electric appliance pressurizes.Biased switch 72 is mainly used for controlling the break-make between pressurized oil lines 7 and working connection 2, and biased switch 72 is preferably
Motor-driven valve has no effect on and achieves the object of the present invention it is of course also possible to be solenoid valve or hand-operated valve.Specifically, pressurized oil lines 7
Set on vacuumizing between oil circuit 4 and the second main switch 24.Certainly, the structure and installation site of pressurized oil lines 7 are without being limited thereto.
One end of capacity check oil circuit 8 is connected with working connection 2 and fuel tank 21 respectively successively, mainly for detection of gas relay
Device capacity.In this specific embodiment, capacity check oil circuit 8 includes the second flowmeter being sequentially connected from bottom to top by pipeline
81, the first capacity check switch 82 and the second capacity check switch 83.Second flowmeter 81 is installed on the first capacity check switch
Between 82 and fuel tank 21, mainly for detection of the flow of capacity check oil circuit 8, and light gas is recorded by second flowmeter 81 and is connect
Oily cubical content when point tripping.First capacity check switch 82 and the second capacity check switch 83 are respectively arranged in master by pipeline
The both sides of oil circuit 2, it is natural to be equipped with four-way connection in the junction of working connection 2.It is worth noting that, in order to accurately detect gas after
The capacity of electric appliance, the second capacity check switch 83 necessarily are greater than the setting of working connection 2.Specifically, capacity check oil circuit 8, which is located at, clamps
Between device 1 and pressure-detecting device 6, and the first capacity check switch 82 and the second capacity check switch 83 are preferably electronic
Valve, certainly, the two can also be solenoid valve or hand-operated valve, have no effect on and achieve the object of the present invention.
The application further includes control device, the control device respectively with working connection 2, heated oil 2, vacuumize oil circuit 4, plus
Pressure oil road 7 is connected with capacity checking apparatus oil circuit 8, is mainly used for controlling the break-make of each oil circuit respectively.Due to the control of each oil circuit
Switch is both preferably motor-driven valve, naturally, control device can be connected with the control of each oil circuit switch respectively, by controlling each control
The open or close of switch realizes the channel of each oil circuit, is automatically controlled to be advantageously implemented.In addition, control device is also distinguished
It is connected with the first temperature-detecting device 31 and second temperature detection device 35, for respectively according to the first temperature detection received
The signal that device 31 and second temperature detection device 35 are started controls 32 break-make of heating device.
In conclusion clamping device 1 provided herein, working connection 2, heated oil 3 and vacuumizing oil circuit 4.Due to
Heated oil 3 oil liquid temperature that Buchholz relay is flowed through on working connection 2 can be heated to it is consistent with actual set temperature, to
Each check results because of caused by oil liquid temperature difference are avoided error occur, to promote the accuracy of associated check result.And by
The damaged degree of float can be first checked before hollow float formula Buchholz relay carries out pressure test in vacuumizing oil circuit 4, with
Influence of the float breakage to pressure test result is eliminated, to further improve the accuracy of check results.Therefore, the application
The gas-actuated relay calibration stand of offer can effectively improve the accuracy of Buchholz relay associated check result.
The application also provides a kind of method of calibration of gas-actuated relay calibration stand, includes the following steps：
Start clamping device 1 and clamps Buchholz relay；Close all control switches；
Start the first temperature-detecting device 31, whether 21 inner fluid temperature of detection fuel tank is less than preset temperature value, if so,
Then start heating device 32, the first heater switch 33 and the second heater switch 34 is opened simultaneously, and start oil pump 22, in fuel tank 21
Fluid constantly flow through the heating bath of heating device 32, complete the circulating-heating of 2 inner fluid of working connection；Otherwise heating device 32 is not
Start；
The first main switch 23 and the second main switch 24 are opened, while starting oil pump 22, the fluid after heating enters working connection
2, it continues for some time, completes the preheating of fluid on working connection 2；Start second temperature detection device 35, detection heating dress simultaneously
The temperature of heating bath in 32 is set, if the temperature of heating bath, higher than the temperature value of the experiment setting of working connection 2, heating device 32 stops
Heating, otherwise continues to heat；
When fluid is full of working connection 2, starts flow detector 5 and detect the fluid flow for flowing through Buchholz relay；
The first main switch 23 and the second main switch 24 are closed, starting capacity detects the capacity that oil circuit 8 detects Buchholz relay；
Specifically, the first capacity check switch 82 and the second capacity check switch 83 are opened, second flowmeter 81 detects Buchholz relay
Capacity；The first capacity check switch 82 and the second capacity check switch 83 are closed, the capacity check of Buchholz relay is completed,
Capacity check oil circuit 8 is closed,
The first main switch 23 and the second main switch 24 are opened, while starting oil pump 22, working connection 2 is full of fluid, closes the
One main switch 23 and the second main switch 24；
When Buchholz relay to be detected is measuring cup type Buchholz relay, startup pressurized oil lines 7, specific booster air pump 71,
Biased switch 72 is opened simultaneously, until pressure reaches the first preset pressure value in measuring cup type Buchholz relay, closes biased switch
72 and air pump 71, namely pressurized oil lines 7 are closed, and start the pressure that pressure-detecting device 6 detects working connection 2, Ye Jijian simultaneously
Measure the pressure of cup type Buchholz relay；
When this relay to be detected is hollow float formula Buchholz relay, first starting capacity detection oil circuit 8 detects hollow
Float-type Buchholz relay capacity specifically opens the first capacity check switch 82 and the second capacity check switch 83, second
Gauge 81 detects the capacity of Buchholz relay, until the fluid capacity in hollow float formula Buchholz relay reaches preset capacity value
Afterwards, the first capacity check switch 82 and the second capacity check switch 83 are closed, namely closes capacity check oil circuit 8；Then start
Oil circuit 4 is vacuumized, specifically starts vacuum pump 41, and open vacuum switch 42, until in hollow float formula Buchholz relay
Vacuum degree reaches predetermined vacuum angle value, closes vacuum pump 41 and vacuum switch 42, namely close and vacuumize oil circuit 4；Then again
The first main switch 23 and the second main switch 24 are opened, while starting oil pump 22, working connection 2 is full of fluid, closes the first main switch
23 and second main switch 24；Finally start pressurized oil lines 7, specific booster air pump 71 opens simultaneously biased switch 72, until hollow
Pressure reaches the second preset pressure value in float-type Buchholz relay, closes air pump 71 and biased switch 72, namely close pressurization
Oil circuit 7, and start the pressure that pressure-detecting device 6 detects hollow float formula Buchholz relay simultaneously.
A kind of method of calibration of gas-actuated relay calibration stand provided by the present invention, advantageous effect having the same.
Finally, it is to be noted that, herein, relational terms such as first and second and the like be used merely to by
One entity or operation are distinguished with another entity or operation, without necessarily requiring or implying these entities or operation
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant meaning
Covering non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only that
A little elements, but also include other elements that are not explicitly listed, or further include for this process, method, article or
The intrinsic element of equipment.In the absence of more restrictions, the element limited by sentence "including a ...", is not arranged
Except there is also other identical elements in the process, method, article or apparatus that includes the element.
Gas-actuated relay calibration stand provided by the present invention and its method of calibration are described in detail above, herein
Applying specific case, principle and implementation of the present invention are described, and the explanation of above example is only intended to help
Understand the method and its core concept of the present invention；Meanwhile for those of ordinary skill in the art, according to the thought of the present invention,
There will be changes in the specific implementation manner and application range, in conclusion the content of the present specification should not be construed as to this
The limitation of invention.
Claims (10)
1. a kind of gas-actuated relay calibration stand includes the clamping device for fixing Buchholz relay, which is characterized in that including：
It is connected to the both ends of the clamping device, for the working connection for Buchholz relay fuel feeding；
Both ends are connected on the working connection, the heated oil for heating the working connection fluid；
One end is connected on the working connection, for that vacuum can vacuumize oil circuit in gas extraction relay.
2. gas-actuated relay calibration stand according to claim 1, which is characterized in that further include：
Flow detector on the working connection, for detecting Buchholz relay flow.
3. gas-actuated relay calibration stand according to claim 2, which is characterized in that further include：
Pressure-detecting device on the working connection, for detecting Buchholz relay pressure.
4. gas-actuated relay calibration stand according to claim 2, which is characterized in that further include：
One end is connected on the working connection, the pressurized oil lines for pressurizeing to the working connection.
5. gas-actuated relay calibration stand according to any one of claims 1 to 4, which is characterized in that the working connection includes：
Fuel tank for holding fluid；
Oil pump set on the side of the fuel tank, for driving fluid to flow；
Between the oil pump and the clamping device, for controlling fluid break-make between the oil pump and the clamping device
The first main switch；
Between the fuel tank and the clamping device, for controlling fluid break-make between the fuel tank and the clamping device
The second main switch.
6. gas-actuated relay calibration stand according to claim 5, which is characterized in that further include：
One end is connected respectively with the working connection and the fuel tank, is oily for detecting the capacity check of Buchholz relay capacity successively
Road.
7. gas-actuated relay calibration stand according to claim 6, which is characterized in that further include：
Respectively with the working connection, the heated oil, described vacuumize oil circuit, the pressurized oil lines and capacity check oil circuit phase
Even, the control device for controlling each oil circuit break-make respectively.
8. gas-actuated relay calibration stand according to claim 5, which is characterized in that the heated oil includes：
The first temperature-detecting device in the fuel tank, for detecting oil liquid temperature；
One end is connected between first main switch and the oil pump and the other end connects the fuel tank and opened with second master
Between pass, the letter that is connected with first temperature-detecting device and is used to be sent according to first temperature-detecting device of reception
Number heating fluid heating device；
It is installed in the heating device, the second temperature detection device for detecting the heating device internal temperature；
The end that is installed on the heating device, the heater switch for controlling the fluid break-make for flowing through the heating device.
9. gas-actuated relay calibration stand according to claim 8, which is characterized in that the oil circuit that vacuumizes includes：
Vacuum pump for extracting air in the Buchholz relay；
It is connected between the vacuum pump and the working connection, the vacuum switch for controlling the two break-make.
10. a kind of method of calibration of gas-actuated relay calibration stand, which is characterized in that include the following steps：
Start gripping means grips Buchholz relay；
Start whether the first temperature-detecting device detection fuel tank inner fluid temperature is less than preset temperature value, adds if it is, starting
Thermal heats working connection fluid；
The first main switch and the second main switch are opened, while starting oil pump, preheats working connection fluid；
Start the fluid flow that flow detector detection flows through Buchholz relay；
The first main switch and the second main switch are closed, starting capacity detects the capacity of oil circuit detection Buchholz relay；
Capacity check oil circuit to be closed, opens the first main switch and the second main switch, while starting oil pump, working connection is full of fluid,
Close the first main switch and the second main switch；
When Buchholz relay to be detected is measuring cup type Buchholz relay, start pressurized oil lines, until measuring cup type Buchholz relay
Interior pressure reaches the first preset pressure value, closes pressurized oil lines, and start simultaneously pressure-detecting device detection measuring cup type gas after
The pressure of electric appliance；
When this relay to be detected is hollow float formula Buchholz relay, first starting capacity detection oil circuit detects hollow float formula
Buchholz relay capacity closes capacity until after the fluid capacity in hollow float formula Buchholz relay reaches preset capacity value
Detect oil circuit；Then start and vacuumize oil circuit, until vacuum degree reaches predetermined vacuum angle value in hollow float formula Buchholz relay,
Closing vacuumizes oil circuit；Then the first main switch and the second main switch to be opened again, while starting oil pump, working connection is full of fluid,
Close the first main switch and the second main switch；Finally start pressurized oil lines, until pressure reaches in hollow float formula Buchholz relay
To the second preset pressure value, pressurized oil lines are closed, and start pressure-detecting device detection hollow float formula Buchholz relay simultaneously
Pressure.
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