CN111238792A - Gas relay transient calibration device and method - Google Patents
Gas relay transient calibration device and method Download PDFInfo
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- CN111238792A CN111238792A CN202010244615.4A CN202010244615A CN111238792A CN 111238792 A CN111238792 A CN 111238792A CN 202010244615 A CN202010244615 A CN 202010244615A CN 111238792 A CN111238792 A CN 111238792A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- 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
- G01R31/3277—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches
- G01R31/3278—Testing of circuit interrupters, switches or circuit-breakers of low voltage devices, e.g. domestic or industrial devices, such as motor protections, relays, rotation switches of relays, solenoids or reed switches
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Abstract
The application discloses transient calibration device and method for a gas relay, which comprises the following steps: the device comprises a power generation module, a pulsating flow generation cavity, a gas relay body, an oil storage and return module, a containing cavity, a processing system and a control system; the power generation module is connected with the pulsating flow generation cavity; an adjusting module is arranged in the pulsating flow generating cavity or at the outlet of the pulsating flow generating cavity; the pulsating flow generation cavity is connected with the gas relay body through a first check pipeline; a flow meter is arranged on the outer side of the pipe wall of the first checking pipeline; the gas relay body is connected with the oil storage and return module through a second check pipeline; the top of the oil storage and return module is connected with the containing cavity through an oil pumping pipeline; an oil well pump is arranged at the inlet of the oil pumping pipeline; the top of the containing cavity is connected with a second check pipeline; a liquid level meter is arranged in the containing cavity. The invention can perform transient verification on the gas relay so as to check the transient action response condition of the relay, accord with the actual operation condition, and can prevent the problems of low sensitivity, untimely output signal and the like of the gas relay in operation.
Description
Technical Field
The application relates to the technical field of power equipment detection, in particular to a transient calibration device and method for a gas relay.
Background
The gas protection is one of main protection of the transformer, and can effectively reflect internal faults such as short circuit between layers and turns of the transformer, iron core faults, internal faults of a sleeve, internal disconnection of a winding, insulation degradation, oil level reduction and the like. The gas relay (also called as gas relay) is used as a functional device for gas protection and is arranged on a connecting pipe between a transformer oil conservator and an oil tank, a magnetic control element-dry reed switch pipe (reed pipe) is used as a contact action element in the relay, and the gas relay has the characteristics of simple structure, small volume, small attraction power, high sensitivity and the like, the attraction and release time is generally within 0.5-2 ms, and the action signal is ensured to be output in time. When the oil is decomposed to generate gas or oil flow surges due to internal faults of the transformer, the contact of the gas relay acts to send out an alarm (light gas action) or a tripping (heavy gas action) signal, so that fault equipment can be found or removed in time, accidents are avoided from occurring or expanding, and the adoption of the contact action of the gas relay has important significance.
In practical application, the gas relay needs to be verified after leaving factory and running for a certain period (usually in combination with the overhaul of the transformer), and the gas relay can reliably act under the action setting value of light gas and heavy gas. In the past, the action flow rate setting value of the gas relay is based on the steady-state flow rate in the connecting pipe, and the calibration method of the gas relay is as follows according to the standard requirement: and (3) adjusting the oil flow speed (the oil temperature is not lower than 20 ℃) of the relay calibration console, stabilizing for 3-5 min from 0 under the steady oil flow impact of 30-40% of the setting value of the flow speed, and observing the stability of the relay calibration console. And slowly increasing the oil flow speed increment of not more than 0.02m/s until a tripping action output exists, and measuring a steady-state flow speed value. The error of each action value of the relay is not more than +/-10% of the setting value.
The checking method adopts a mode of slowly increasing the oil flow speed, and the action value of the gas relay is basically stable constant oil flow. However, in the case of a failure of an actual transformer, a transient oil flow surge is generated, and the oil flow speed can rapidly reach a set value within a very short time (hundreds of milliseconds or even a few milliseconds). For some slight faults inside, the transient surging oil flow may be in a pulse form, the peak value of the transient surging oil flow is close to the setting value, the transient surging oil flow reaches the setting value in a very short time and then rapidly falls back, and the duration time higher than the setting value is very short (hundreds of milliseconds or even a few milliseconds). Therefore, the action condition of the gas relay which is qualified by the current steady-state oil flow verification method under the actual transient oil flow impact is not examined, and the fault is not discovered in time. Secondly, the current checking method stipulates that the error of each action value of the gas relay is not more than +/-10% of a setting value, and under the steady-state oil flow checking method of slowly increasing the oil flow speed, the correct action time of the gas relay is an uncertain long time period (more than a few seconds). If the gas relay contact reed switch has opening and closing stagnation and adhesion, the detection cannot be carried out at all, and in practical application, under the condition that the stagnation and adhesion time of the reed switch is longer, the timely removal of faults is not facilitated. In summary, the steady-state oil flow calibration method for the gas relay, which is used all the time, has obvious defects, the transient calibration method for the gas relay, which meets the actual operation condition, is provided, and the development of a suitable calibration device is significant, so that the invention provides the transient calibration device and the method for the gas relay.
Disclosure of Invention
The embodiment of the application provides a transient checking device and a transient checking method for a gas relay, so that transient checking can be carried out on the gas relay, the transient action response condition of the relay is checked, the device accords with the actual operation working condition, and the problems that the gas relay is not high in sensitivity and output signals are not timely in operation can be prevented.
The application provides a gas relay transient state verifying attachment in a first aspect, includes: the device comprises a power generation module, a pulsating flow generation cavity, a gas relay body, an oil storage and return module, a containing cavity, a processing system and a control system;
the power generation module is connected with the pulsating flow generation cavity;
a regulating module for regulating oil flow pulses is arranged in the pulsating flow generating cavity or at the outlet of the pulsating flow generating cavity;
the pulsating flow generation cavity is connected with the gas relay body through a first check pipeline;
a flow velocity meter is arranged on the outer side of the pipe wall of the first checking pipeline;
the gas relay body is connected with the oil storage and return module through a second checking pipeline;
the top of the oil storage and return module is connected with the containing cavity through an oil pumping pipeline;
an oil well pump is arranged at the inlet of the oil pumping pipeline;
the top of the containing cavity is connected with the second check pipeline;
a liquid level meter is arranged in the containing cavity;
the control system is respectively and electrically connected with the power generation module, the adjusting module and the oil well pump;
the processing system is respectively electrically connected with the flow meter, the liquid level meter, the gas relay body and the control system.
Optionally, a first electromagnetic valve is arranged at an outlet of the power generation module;
a second electromagnetic valve is arranged at an outlet of the pulsating flow generation cavity;
a third electromagnetic valve is arranged at the inlet of the oil storage and return module;
the top of the containing cavity is connected with the second check pipeline through a fourth electromagnetic valve;
the bottom of the containing cavity is connected with the oil pumping pipeline through a fifth electromagnetic valve;
the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve and the fifth solenoid valve are all electrically connected with the control system.
Optionally, the distance between the flow meter and the pulsating flow generation chamber is not less than 1 m.
Optionally, the oil storage and return module is located above the pulsating flow generation cavity.
Optionally, an oil level indicating device for displaying an internal oil level of the oil storage and return module is arranged on the oil storage and return module.
Optionally, a temperature sensor for detecting the oil temperature during calibration is arranged inside the oil storage and return module;
the temperature sensor is electrically connected with the processing system.
Optionally, a gas release plug for balancing internal and external pressures during oil pumping and injection is arranged at the top of the first checking pipeline.
Optionally, the power generation module is an air cannon, an airbrush, or a punch.
Optionally, the flow meter is an ultrasonic flow meter.
The second aspect of the present application provides a transient calibration method for a gas relay, which is implemented based on the above transient calibration apparatus for a gas relay, and the method includes: the power generation module applies standard oil flow pulse to the insulating oil in the pulsating flow generation cavity, and the processing system generates a synchronization curve according to the detected heavy gas contact action signal of the gas relay and the detected oil flow pulse signal;
and judging whether the flow rate corresponding to the heavy gas action moment of the gas relay is within a first preset range or not according to the synchronous curve, if so, judging the response time by calculating the difference value between the rising moment and the falling moment of the pulse curve corresponding to the heavy gas action moment, the resetting moment and the lower flow rate limit of the gas relay, if the response time is within a second preset range, checking the gas relay to be qualified, and if not, checking the gas relay to be unqualified.
According to the technical scheme, the embodiment of the application has the following advantages: comprises a power generation module, a pulsating flow generation cavity, a gas relay body, an oil storage and return module and a containing cavity, processing system and control system, power generation module takes place the chamber with the pulsating flow and is connected, the pulsating flow takes place the intracavity portion or the exit is provided with the adjusting module who is used for adjusting the oil stream pulse, the pulsating flow takes place the chamber and is connected with this body of gas relay through first check-up pipeline, the current meter is installed in the pipe wall outside of first check-up pipeline, the gas relay body passes through the second check-up pipeline and is connected with the oil storage return module, it holds the chamber to store up oil return module top through oil pumping pipe connection, oil pumping pipe entrance is provided with the oil-well pump, hold chamber top and second check-up pipe connection, it is provided with the level gauge to hold the intracavity, control system respectively with power generation module, adjusting module and oil-well pump electricity are connected, processing system respectively. The transient power generation module is adopted to generate oil flow pulses to carry out transient verification on the gas relay body, the transient action response condition of the gas relay body can be checked, the verification method accords with the actual operation working condition, and the problems that the gas relay is not high in sensitivity and output signals are not timely in operation and the like can be prevented.
Drawings
Fig. 1 is a schematic structural diagram of a transient calibration apparatus for a gas relay in an embodiment of the present application;
fig. 2 is a calibration synchronization curve chart actually measured by the transient calibration device for the gas relay in the embodiment of the present application;
FIG. 3 is a calibration synchronization curve chart of the gas relay transient calibration device in consideration of sticking factors of the reed pipe in the embodiment of the present application;
wherein the reference numerals are:
the device comprises a power generation module, a first electromagnetic valve, a pulse flow generation cavity, a regulation module, a first check pipeline, a flow rate meter, a gas release plug, a gas relay body, a second check pipeline, a 10 oil storage and return module, a flange, a second electromagnetic valve, a third electromagnetic valve, a fourth electromagnetic valve, a 15 oil well pump, a cavity, a 16 cavity, a fifth electromagnetic valve, a 17 liquid level meter and a liquid level meter, wherein the power generation module, the first electromagnetic valve, the 3 pulse flow generation cavity, the regulation module, the first check pipeline, the 6 flow rate meter, the 7 gas release plug, the 8 gas relay body.
Detailed Description
In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, 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 application.
In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may 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 meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Referring to fig. 1 to 3, the present application provides a transient calibration apparatus for a gas relay, including: the device comprises a power generation module 1, a pulsating flow generation cavity 3, a gas relay body 8, an oil storage and return module 10, a containing cavity 16, a processing system and a control system, wherein the power generation module 1 is connected with the pulsating flow generation cavity 3.
It should be noted that: the power generation module 1 provides transient impact force for the checking device, and acts on the insulating oil in the pulsating flow generation cavity 3 to generate initial oil flow pulse. Specifically, the power generation module 1 includes, but is not limited to, one of an air cannon, an air gun, and a punch. The pulsating flow generation cavity 3 provides a working space for the power generation module 1, and the oil flow is excited to surge inside the cavity and released through the outlet of the pipeline to form oil flow pulse.
A regulating module 4 for regulating the oil flow pulses is arranged inside or at the outlet of the pulsating flow generating chamber 3. It will be appreciated that once the activation energy of the power generation module 1 is set, it acts on the pulseCharacteristics of the initial oil flow pulse (including rise time t) generated by the flow generating chamber 3fAnd peak flow velocity VmaxTwo characteristic variables) are also fixed. The larger the operating energy is, the rise time t of the initial oil flow pulse isfThe shorter (i.e. the steeper the rising edge), the peak flow velocity V that can be achievedmaxIs also higher, however tfAnd VmaxThere is a correlation that the way of setting the motion energy singly cannot guarantee tfAnd VmaxAnd meanwhile, the standard oil flow pulse parameter requirement required by transient verification is met. A regulating module 4 is therefore provided inside or at the outlet of the pulsating flow generating chamber 3. Specifically, the adjusting method includes, but is not limited to, controlling the pipe diameter of the outlet of the pulsating flow generation cavity 3, controlling the capacity of the pulsating flow generation cavity 3, adjusting the internal structure of the pulsating flow generation cavity 3, and the like, and the standard oil flow pulse (rise time t) required for transient verification is generated together by cooperating with the energy settingrefAnd peak flow velocity Vref) So as to realize the adjustability of the peak flow rate and the rise time of the oil flow pulse.
Pulsating flow takes place chamber 3 and is connected with gas relay body 8 through first check-up pipeline 5, velocity of flow appearance 6 is installed in the pipe wall outside of first check-up pipeline 5, gas relay body 8 is connected with storage oil return module 10 through second check-up pipeline 9, wherein first check-up pipeline 5 is unanimous with the pipe diameter of second check-up pipeline 9, first check-up pipeline 5 and second check-up pipeline 9 divide into two parts with the checking device main part, two parts one side or both sides are located movable platform, adjust both sides distance through control system, realize waiting to check up the loading of gas relay. Specifically, the two ends of the first check pipeline 5 are connected with the pulsating flow generation cavity 3 and the gas relay body 8 through flanges 11 respectively, and the two ends of the second check pipeline 9 are connected with the gas relay body 8 and the oil storage and return module 10 through flanges 11 respectively.
It should be noted that: the gas relay that treats the check is connected to the right-hand member of first check-up pipeline 5 and the left end centre gripping of second check-up pipeline 9, installs the velocity of flow appearance 6 that satisfies the measurement requirement of transient flow rate in the pipe wall outside of being close to first check-up pipeline 5 right-hand member, and wherein the velocity of flow appearance 6 can be ultrasonic wave velocity of flow appearance 6 (response time is millisecond level), can the velocity of flow of non-contact measurement first check-up pipeline 5 to do not influence the inside flow field of first check-up pipeline 5.
The top of the oil storage and return module 10 is connected with the containing cavity 16 through an oil pumping pipeline, and an oil well pump 15 is arranged at the inlet of the oil pumping pipeline and used for pumping out the oil stored in the first checking pipeline 5, the second checking pipeline 9, the containing cavity 16 and the gas relay body 8 after the checking is finished; the top of the containing cavity 16 is connected with the second checking pipeline 9, and a liquid level meter 18 is arranged in the containing cavity 16 and used for checking the gas volume of the gas relay.
A first electromagnetic valve 2 is arranged at an outlet of the power generation module 1, and the release of energy is controlled through the first electromagnetic valve 2; a second electromagnetic valve 12 is arranged at the outlet of the pulsating flow generation cavity 3, and insulating oil is filled in the cavity in a non-working state; a third electromagnetic valve 13 is arranged at the inlet of the oil storage and return module 10, and internal insulating oil is sealed in a non-working state; the top of the cavity 16 is connected with the lower part of the second check pipeline 9 through a fourth electromagnetic valve 14, the internal oil storage amount is measured through but not limited to a built-in liquid level meter 18, and the fourth electromagnetic valve 14 at the connection position is controlled to be opened to realize transient check of the gas volume; the bottom of the cavity 16 is connected with an oil pumping pipeline through a fifth electromagnetic valve 17, and when the oil well pump 15 is in a non-working state, the fifth electromagnetic valve 17 is in a normally closed state.
The control system is respectively and electrically connected with the power generation module 1, the regulation module 4, the oil well pump 15, the first electromagnetic valve 2, the second electromagnetic valve 12, the third electromagnetic valve 13, the fourth electromagnetic valve 14 and the fifth electromagnetic valve 17, controls the opening and closing of the electromagnetic valves, sets the action energy of the power generation module 1, controls the regulation module 4 and the control device to move and load a gas relay to be checked, controls the starting and stopping of the oil well pump 15 of a pipeline connecting the oil storage and return module 10 and the second checking pipeline 9, and the like; the processing system is respectively electrically connected with the current meter 6, the liquid level meter 18, the gas relay body 8 and the control system, and the processing system acquires output information of the current meter 6, the liquid level meter 18, the temperature sensor, the corrected gas relay contact and the like, processes calculation, feeds back the control system, generates reports, stores data and the like.
The distance between the flow meter 6 and the pulsating flow generation chamber 3 is not less than 1 m. It should be noted that: in order to ensure the precision of flow velocity measurement, the length of the joint of the left end of the first checking pipeline 5 and the pulsating flow generation cavity 3 from a flow velocity measuring point is not less than 1m, so that turbulence and vortex caused by over-short pipelines are prevented.
The oil storage and return module 10 is located above the pulsating flow generation cavity 3, namely the horizontal height of the oil storage and return module 10 is higher than that of the pulsating flow generation cavity 3, so that the pulsating flow generation cavity 3 and the interior of the pipeline are filled with insulating oil in the working state of the checking device.
The oil storage and return module 10 is provided with an oil level indicating device for displaying the internal oil level thereof; a temperature sensor for detecting the oil temperature during calibration is arranged in the oil storage and return module 10, and the temperature sensor is electrically connected with the processing system; the oil storage and return module 10 realizes the pressure balance between the inside and the outside of the module by means of, but not limited to, communication with the outside air, a built-in capsule, a built-in bellows and the like, so as to prevent the damage of the device caused by the pressure generated by the transient oil flow during verification.
The top of the first checking pipeline 5 is provided with an air relief plug 7 for balancing internal and external pressure during oil pumping and injection.
The application also provides a transient calibration method of the gas relay, which is realized based on the transient calibration device of the gas relay, and the method specifically comprises the following steps: the power generation module 1 applies standard oil flow pulse to the insulating oil in the pulsating flow generation cavity 3, and the processing system generates a synchronous curve according to the detected heavy gas contact action signal of the gas relay and the detected oil flow pulse signal; judging whether the flow rate corresponding to the heavy gas action moment of the gas relay is within a first preset range or not according to the synchronous curve, and if not, checking the gas relay to be unqualified; if yes, judging the response time by calculating the difference value between the heavy gas action time, the resetting time and the pulse curve rising time and the pulse curve falling time corresponding to the lower flow rate limit of the gas relay, and if the response time is in a second preset range, checking the gas relay to be qualified; and if the response time is not in the second preset range, the gas relay is not qualified in verification.
Specifically, the gas relays used on the transformers with different capacities are divided into a plurality of gears, and the flow rate verification of the gas relays of all the gears corresponds to different standard oil flow pulsesAnd (4) punching. Taking into account the deviation of the actual modulation, the standard oil flow pulse rise time trefAnd peak flow velocity VrefA range of deviations is allowed.
As shown in fig. 2 and 3, after each oil flow pulse impact, the device automatically measures and processes to generate a synchronization curve. Wherein the solid line in fig. 2 is the measured oil flow pulse curve of the flow meter 6 and the dashed line is the heavy gas signal. t is t1At the time of heavy gas operation, the corresponding flow rate is Vs, t2At the time of recovering the repeat gas, the sticking factor of the reed pipe is not considered, t2The flow rate at the moment should also be Vs, VminIs the setting lower limit. If the gas relay to be calibrated is in heavy gas action under the impact of the standard oil flow pulse, and the corresponding flow speed at the action moment is Vmin，Vref](rising edge of pulse) and [ Vref，Vmin]And (pulse falling edge) range, entering the next step of judgment, otherwise, checking to be unqualified. FIG. 3 is a calibration synchronization curve considering sticking factors of the reed switch, and the actual in-place moment of the gas relay baffle is t1(t1Not measurable), the heavy gas action time is t1', closing sticking time t of reed pipeb＝t1’-t1，tbTherefore, the hysteresis viscosity check is given by combining the synchronization curve: △ t | (t)2’-t1’)-(t3-t0) And setting the range of △ t, and if △ t meets the requirement, checking the flow rate of the gas relay to be qualified.
For gas volume verification, after light gas is sent, the fourth electromagnetic valve 14 is closed, signals of the liquid level meter 18 are collected to calculate the volume V of the insulating oil in the accommodating cavity 16 and the standard value VrefAnd (5) comparing, and if the error is within the allowable range, the gas volume is verified to be qualified.
In specific implementation, the transient verification of the gas relay comprises the following steps:
the method comprises the following steps: modulating standard oil flow pulses
(1) Before modulation, the power generation module 1, the pulsating flow generation cavity 3, the oil storage and return module 10 and the first electromagnetic valve 2, the second electromagnetic valve 12, the third electromagnetic valve 13, the fourth electromagnetic valve 14 and the fifth electromagnetic valve 17 in the containing cavity 16 are all in a closed state, insulating oil is filled in the pulsating flow generation cavity 3 and the oil storage and return module 10, and no insulating oil exists in the first checking pipeline 5, the second checking pipeline 9 and the containing cavity 16.
(2) And adjusting the distance between the first checking pipeline 5 and the second checking pipeline 9 until the first checking pipeline and the second checking pipeline are clamped mutually, screwing and sealing the surface of the contact flange 11, and opening the air release plug 7 at the top of the first checking pipeline 5.
(3) And successively opening a second electromagnetic valve 12 at the outlet of the pulsating flow generation cavity 3 and a third electromagnetic valve 13 at the inlet of the oil storage and return module 10 until the air release plug 7 at the top of the first checking pipeline 5 produces oil, and then screwing down the air release plug 7. At this time, the first checking pipeline 5 and the second checking pipeline 9 are completely filled with oil.
(4) And controlling the power generation module 1 to store energy and release the energy. The power generation module 1 is taken as an air cannon for illustration, the control system controls the air compressor to inflate the air cannon, the energy is set through the pressure value fed back by the pressure gauge, the first electromagnetic valve 2 at the outlet of the air cannon is triggered after the inflation reaches the energy set value, the energy is released, and the first electromagnetic valve 2 is immediately closed after the release is finished.
(5) A profile of oil flow pulses was measured, which is an initial oil flow pulse without conditioning. According to the initial oil flow pulse tf0And Vmax0And (5) setting a regulating module 4 by the feedback control system, and repeating the step (4) until a standard oil flow pulse curve required by the verification is called out.
(6) And closing a second electromagnetic valve 12 of the pulsating flow generation cavity 3 and a third electromagnetic valve 13 of the oil storage and return module 10, opening a fourth electromagnetic valve 14, and opening an oil well pump 15 to extract residual insulating oil in the first checking pipeline 5 and the second checking pipeline 9 (the air release plug 7 needs to be opened when the oil well pump 15 works). And after the insulating oil is drained, closing the fourth electromagnetic valve 14 and closing the oil well pump 15.
Step two: load gas relay of being proofreaded
(1) The distance between the first checking pipeline 5 and the second checking pipeline 9 is adjusted through the control system, the gas relay to be checked is clamped between the two pipelines, the flange 11 surface is aligned, the distance between the two pipelines is continuously adjusted until the gas relay is clamped, and the contact flange 11 surface is screwed up and sealed.
(2) The light and heavy gas action contact of the gas relay is connected to a sampling circuit of the processing system.
Step three: flow rate verification
(1) And opening an air outlet plug in the junction box at the top of the gas relay.
(2) And opening a second electromagnetic valve 12 at the outlet of the pulsating flow generation cavity 3 and a third electromagnetic valve 13 at the inlet of the oil storage and return module 10 until the top of the gas relay is subjected to gas plug oil outlet, and screwing down the gas plug again. At this time, the first checking pipeline 5, the second checking pipeline 9 and the gas relay are filled with oil completely.
(3) And controlling the power generation module 1 to store energy and release the energy to generate modulated standard oil flow pulses.
(4) And synchronously acquiring data of the current meter 6 and heavy gas contact output signals to a processing system, storing corresponding data, drawing a curve and generating a report.
Step four: gas volume verification
(1) And after the flow rate calibration is finished, the gas volume calibration is carried out after the device recovers to be stable. And opening the air outlet plug in the wiring box at the top of the gas relay until oil is discharged, and screwing the air outlet plug again.
(2) The second solenoid valve 12 at the outlet of the pulsating flow generation chamber 3 and the third solenoid valve 13 at the inlet of the oil storage and return module 10 are closed, and the fourth solenoid valve 14 at the top of the cavity 16 is opened.
(3) And opening a gas outlet plug of the gas relay, discharging oil (the oil discharging speed can be controlled by the fourth electromagnetic valve 14) from the relay until the light gas contact output signal is fed back to close the fourth electromagnetic valve 14, resetting the light gas signal, synchronously acquiring data of the liquid level meter 18 in the cavity 16 to a processing system, storing corresponding data and generating a report.
Step five: device reset
(1) And opening a fourth electromagnetic valve 14 and a fifth electromagnetic valve 17 at the top and the bottom of the cavity 16, and opening an oil well pump 15 to extract the insulating oil in the first checking pipeline 5, the second checking pipeline 9 and the gas relay until the liquid level measured by a liquid level meter 18 in the cavity 16 is zero.
(2) And (5) dismantling the gas relay.
The above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (10)
1. A gas relay transient verification device, comprising: the device comprises a power generation module, a pulsating flow generation cavity, a gas relay body, an oil storage and return module, a containing cavity, a processing system and a control system;
the power generation module is connected with the pulsating flow generation cavity;
a regulating module for regulating oil flow pulses is arranged in the pulsating flow generating cavity or at the outlet of the pulsating flow generating cavity;
the pulsating flow generation cavity is connected with the gas relay body through a first check pipeline;
a flow velocity meter is arranged on the outer side of the pipe wall of the first checking pipeline;
the gas relay body is connected with the oil storage and return module through a second checking pipeline;
the top of the oil storage and return module is connected with the containing cavity through an oil pumping pipeline;
an oil well pump is arranged at the inlet of the oil pumping pipeline;
the top of the containing cavity is connected with the second check pipeline;
a liquid level meter is arranged in the containing cavity;
the control system is respectively and electrically connected with the power generation module, the adjusting module and the oil well pump;
the processing system is respectively electrically connected with the flow meter, the liquid level meter, the gas relay body and the control system.
2. The transient state verification device of a gas relay according to claim 1, wherein a first solenoid valve is arranged at an outlet of the power generation module;
a second electromagnetic valve is arranged at an outlet of the pulsating flow generation cavity;
a third electromagnetic valve is arranged at the inlet of the oil storage and return module;
the top of the containing cavity is connected with the second check pipeline through a fourth electromagnetic valve;
the bottom of the containing cavity is connected with the oil pumping pipeline through a fifth electromagnetic valve;
the first solenoid valve, the second solenoid valve, the third solenoid valve, the fourth solenoid valve and the fifth solenoid valve are all electrically connected with the control system.
3. The gas relay transient verification device of claim 1, wherein a distance between said flow meter and said pulsating flow generation chamber is not less than 1 m.
4. The transient state verification device of claim 1, wherein said oil reservoir module is located above said pulsating flow generation chamber.
5. The transient calibration device for the gas relay according to claim 1, wherein an oil level indicating device for displaying an internal oil level is disposed on the oil storage and return module.
6. The transient state verifying device of the gas relay as claimed in claim 1, wherein a temperature sensor for detecting the oil temperature during verification is arranged inside the oil storage and return module;
the temperature sensor is electrically connected with the processing system.
7. The transient state verification device for the gas relay as claimed in claim 1, wherein a gas release plug for balancing internal and external pressures during oil pumping is arranged at the top of the first verification pipeline.
8. The transient state verification device of claim 1, wherein said power generation module is an air cannon, a high pressure spray gun, or a punch press.
9. The gas relay transient verification device of claim 1, wherein said flow meter is an ultrasonic flow meter.
10. A transient verification method for a gas relay, which is implemented based on the transient verification device for a gas relay according to any one of claims 1 to 9, and which comprises: the power generation module applies standard oil flow pulse to the insulating oil in the pulsating flow generation cavity, and the processing system generates a synchronization curve according to the detected heavy gas contact action signal of the gas relay and the detected oil flow pulse signal;
and judging whether the flow rate corresponding to the heavy gas action moment of the gas relay is within a first preset range or not according to the synchronous curve, if so, judging the response time by calculating the difference value between the rising moment and the falling moment of the pulse curve corresponding to the heavy gas action moment, the resetting moment and the lower flow rate limit of the gas relay, if the response time is within a second preset range, checking the gas relay to be qualified, and if not, checking the gas relay to be unqualified.
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