CN108051032A - The on-line monitoring system of the few oily equipment of substation - Google Patents
The on-line monitoring system of the few oily equipment of substation Download PDFInfo
- Publication number
- CN108051032A CN108051032A CN201711381994.6A CN201711381994A CN108051032A CN 108051032 A CN108051032 A CN 108051032A CN 201711381994 A CN201711381994 A CN 201711381994A CN 108051032 A CN108051032 A CN 108051032A
- Authority
- CN
- China
- Prior art keywords
- sensor
- pressure transmitter
- pressure
- mounting blocks
- oily equipment
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Or Calibration Of Command Recording Devices (AREA)
Abstract
The invention discloses a kind of on-line monitoring systems of the few oily equipment of substation, it is capable of oil liquid pressure, temperature and the hydrogen content of few oily equipment such as monitoring voltage mutual inductor, oil-minimum breaker, (insulation) casing in real time, immediately defect is found, monitoring effect is reliably comprehensive, need not destroy the structure of original equipment body；Simultaneously also with very easily oil sample gathers structure.The present invention includes a threeway being mounted on the fuel outlet；One entrance of threeway is connected with the fuel outlet, is separately installed with monitoring sensor in two outlets of threeway and is drawn down-sampling pipe；The centrally disposed screw thread mounting head for being useful for being assembled in the one outlet of the threeway of bottom cover of the monitoring sensor；The enclosure sets gradually the pressure transmitter mounting blocks being fixedly mounted on bottom cover and the hydrogen gas sensor for being fixed on pressure transmitter mounting blocks from bottom to top, and pressure transmitter is equipped on the pressure transmitter mounting blocks.
Description
Technical field
The present invention relates to the monitoring technology of the few oily equipment of substation, specifically for the oil state of few oily equipment of substation
Monitoring.
Background technology
The few oily equipment of the substations such as transformer, reactor is one of capital equipment of electric system, is risen in electric system
Very important effect.As the popularization of few oily equipment and technology, voltage transformer, oil-minimum breaker, (insulation) casing etc. are few
For oily equipment as one of transformer, reactor important accessory, reliability directly affects the safe operation of transformer, reactor.
Three 750 kilovolts of bushing failure exception events have occurred in Xinjiang Power in 2017, because it is found that in time, not causing great electricity
Net accident, otherwise consequence is hardly imaginable.Therefore, it is extremely urgent to carry out few oily equipment on-line monitoring.Due to few oily device structure
Particularity, currently for few oily equipment effective live detection or on-line monitoring almost without current detection and monitoring
It is only limitted to regularly be detected in the sampling valve position discharge oil sample of the fuel outlet of few oily equipment；As can one kind is taken simply to have
The on-line monitoring mode of effect finds defect in time before casing failure, and adopts an effective measure, and will be avoided that the hair of major accident
It is raw.Oil-impregnated paper insulation casing occurs discharging in inside pipe casing or when thermal fault will make oil and paper decompose and generate gas, works as gas
During beyond the solubility of oil, failure gas will be assembled at bushing head oil conservater, increase inside pipe casing pressure；
It is analyzed by us, the important parameter of the state operation of current few oily equipment includes oil temperature, oil pressure and dissolved hydrogen；
Generally, it is very little for the monitoring technology of dissolved hydrogen, therefore theoretically idea is all try every possible means acquisition oil temperature and oil pressure, oil temperature is oily
The variation of pressure can bring the change of final operating parameter, can find security risk immediately.
The content of the invention
In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is that it is few to provide a kind of substation
The on-line monitoring system of oily equipment monitoring voltage mutual inductor, oil-minimum breaker, (insulation) casing etc. can lack oily equipment in real time
Oil liquid pressure, temperature and hydrogen content, find defect immediately, monitoring effect is reliably comprehensive, need not destroy original equipment body
Structure；Simultaneously also with very easily oil sample gathers structure.
In order to achieve the above object, the present invention is achieved by the following scheme：
The on-line monitoring system of the few oily equipment of substation, few oily equipment include fuel outlet, comprising being put mounted on described
A threeway on hydraulic fluid port；One entrance of threeway is connected with the fuel outlet, and prison is separately installed in two outlets of threeway
It surveys sensor and draws down-sampling pipe；Draw down-sampling pipe to extend downwardly, and draw the end installation Sampler valves of down-sampling pipe；Described three
It is equipped with to switch entrance on logical and two exports the switch valve being respectively turned on；
The monitoring sensor includes the shell of cylinder type, the bottom installation bottom cover of shell, the top installation of shell
Head cover, the centrally disposed screw thread mounting head for being useful for being assembled in the one outlet of the threeway of bottom cover；The enclosure is certainly
The pressure transmitter mounting blocks being fixedly mounted on bottom cover are set gradually on down and for being fixed on pressure transmitter peace
The hydrogen gas sensor on block is filled, pressure transmitter is installed on the pressure transmitter mounting blocks；The pressure transmitter includes
Pressure sensor and temperature sensor；The enclosure is equipped with the stent of L-type, the stent one of L-type close to the position of head cover
Side mounting circuit boards, opposite side are equipped with the dry cell for powering for circuit board, pressure transmitter and hydrogen gas sensor；
The screw thread mounting head is introduced fluid inside pressure transmitter mounting blocks by the intercommunicating pore that center opens up, described
Triplate line is set in pressure transmitter mounting blocks, and the entrance of triplate line is the intercommunicating pore, and two of triplate line export
Respectively the first fluid hole and the second fluid hole；
The side of the pressure transmitter mounting blocks offers the pressure transmitter assembly hole for stacking pressure transmitter,
The bottom centre of pressure transmitter assembly hole is first fluid hole；The top surface of the pressure transmitter mounting blocks with it is described
Hydrogen gas sensor connects, and second fluid hole is opened in the top surface and and hydrogen gas sensor of the pressure transmitter mounting blocks
Detect entrance connection；
The circuit board includes CPU and wireless module；
The display instrument wireless telecommunications on the spot of the wireless module and monitoring sensor external；The display instrument on the spot and distal end
Background computer pass through wireless communication module wireless telecommunications.
A kind of preferred embodiment as the present invention：The display instrument on the spot include controller, display, alarm and
For the wireless communication module communicated with background computer；The controller and the display, alarm and wireless telecommunications mould
Block connects；The environment temperature sensor and ambient humidity that the display instrument on the spot also includes power module, is connected with controller
Sensor；The wireless communication module is 433MHz wireless communication modules.
A kind of preferred embodiment as the present invention：The controller of the display instrument on the spot include amplification circuit module,
Arm processor, digital analog converter, voltage current adapter and electric current galvanostat；Controller, which will monitor sensor passes, to be come
Pressure sensor, temperature sensor, the signal of hydrogen gas sensor signal amplification is carried out by built-in amplification circuit module,
Amplified signal is calculated by the arm processor；The signal data being calculated is turned by digital analog converter
It changes voltage signal into, current signal is then changed by the voltage current adapter, current signal passes through electric current galvanostat
It is shown afterwards by the wireless communication module transmission of display instrument on the spot and by display.
A kind of preferred embodiment as the present invention：Wire connection terminal is provided on the circuit board of the monitoring sensor,
CPU, wireless communication module and signal processing module are included on circuit；The CPU is msp430g2433, and wireless chip is
si4432；The enclosure is provided with semicircular assembling frame above hydrogen gas sensor, is provided with and is used in assembling frame
The battery compartment of embedded single dry cell, the both sides for assembling the top surface of frame are provided with to fix the stent of the L-type support and fix
Hole, the dry cell are located in the battery compartment between L-type support and assembling frame.
A kind of preferred embodiment as the present invention：The system acquisition amount includes oil pressure, temperature, battery capacity and
Dissolve hydrogen content；After system starts, system is first configured, and closes the power supply of dry cell after setting up, wireless module and cpu into
Enter dormant state, when there is wireless wake-up signal in outside, wireless module is waken up by cpu, and wireless module is arranged to wake up by cpu again
State opens the power supply of dry cell, gathers each parameter, and is sent to display instrument on the spot, after finishing system dormancy again.
A kind of preferred embodiment as the present invention：The shell is provided with close to the side of bottom and top for solid
Determine the side mounting hole of bottom cover and head cover；Corresponding, the outer surface of the part of the bottom cover and head cover insertion enclosure opens up
There is the internal thread hole with the side fixed block location matches；It offers to fix the pressure transmitter peace on the bottom cover
The threaded hole of block is filled, the threaded hole is bottom surface mounting hole；The bottom surface mounting hole is uniformly distributed four；It is corresponding, the pressure
The bottom surface of power transmitter mounting blocks, which is also provided with, to be located at and the matched fastener hole of bottom surface mounting hole.
A kind of preferred embodiment as the present invention：The housing of the hydrogen gas sensor, the housing of pressure transmitter and
The shell is copper material；The switch valve is hand-operated valve, and rotating mark is provided on the valve handle of the hand-operated valve；It is described
Pressure sensor uses range as 0~0.5MPa, and precision is 0.1 grade, absolute pressure transducer of the temperature at -40~80 degree；Institute
Temperature sensor is stated using A grades of Pt100 platinum resistance, precision is 0.1 degree；The hydrogen gas sensor uses technical grade fuel cell gas
Body sensor, operating temperature：- 40-80 DEG C, 0-2000 microlitres/liter of detection range, accuracy of detection：± 10% or ± 20 microlitres/
It rises.
A kind of preferred embodiment as the present invention：Few oily equipment includes fuel outlet for bottom and top includes
Few oily equipment of liquid level gauge；The housing side of the liquid level gauge offers to install the casing of monitoring sensor；Described sleeve pipe
It is connected with the fluid of few oily equipment inner top, the liquid level gauge includes floating ball structure；One end of floating ball is placed in fluid, and floating ball is another
One end is rotated by the lifting of floating ball, and rotation process drives the liquid level gauge indicators turn of magnetic connection.
A kind of preferred embodiment as the present invention：The pressure transmitter includes housing, is sealedly attached to the shell
The cable connector of body upper port, is fixed on the in vivo temperature sensor and pressure sensor of shell, and the temperature sensor, pressure pass
The signal output part of sensor is electrically connected with the cable connector；The temperature sensor is by blind pipe and is fixed in the blind pipe
Temperature-sensing element is formed, and the nozzle of blind pipe is sealed and is fixedly connected with the casing by pipe plug, the signal of the temperature-sensing element
Pipe plug described in output line hermetically passing is electrically connected with cable connector, the cecum portion of blind pipe from the lower port of housing extend housing it
The fluid of first liquid outlet described in outer contacting；The pressure sensitive face of the pressure sensor is gone out by the lower port of housing with first
The fluid contact of liquid mouth；The longitudinal section of the pressure sensor is inverted U-shaped.
A kind of preferred embodiment as the present invention：The hydrogen gas sensor includes hydrogen gas sensor shell, described
Gas detection cell is installed in hydrogen gas sensor shell, the gas detection cell include electrolyte layer and with the electrolysis
Working electrode that matter layer is combined into one, to electrode and reference electrode；Towards work electricity in the hydrogen gas sensor shell
The one side of pole is equipped with gas diffusion membrane, seals to form use by sealing element between the gas diffusion membrane and the working electrode
Gas chamber is reacted in the working electrode that hydrogen reacts on the working electrode, the gas diffusion membrane is the gas of non-porous structure
Body diffusion barrier, the electrolyte layer are solid-state electrolyte layer or semisolid electrolyte layer；The hydrogen gas sensor shell includes tool
Have a main body of opening and lid be located at the main body opening cover, be provided with sealing ring on the side wall of the cover, it is described
The inner wall of the opening of hydrogen gas sensor shell is formed with the recess to match with the sealing ring；The working electrode is located at institute
State the one side of electrolyte layer, the opposite side that the electrolyte layer is located to electrode and reference electrode and described to electrode and ginseng
It is set up in parallel than opposite side of the electrode in the electrolyte layer.
Present invention has the advantages that：
Monitoring sensor acquisition pressure signal, temperature signal and the hydrogen letter of the few oily equipment of substation disclosed by the invention
Number, then by the signal transmission of acquisition to display instrument on the spot；Display instrument carries out live display and is passed to background computer on the spot
It is defeated；Background computer is located at the monitoring room of substation；Therefore, entire monitoring is real time and on line monitoring, very useful convenient so that
Early stage the defects of fluid parameter of few oil equipment finds immediately；The setting for drawing down-sampling pipe and Sampler valves causes fluid to gather position
Setting in relatively low position so that fluid acquisition is more convenient.Monitoring sensor integration pressure sensor, the temperature of the present invention
Sensor and hydrogen gas sensor are spent, therefore the parameter gathered is comprehensive；
The monitoring sensor of the present invention includes the shell of cylinder type, the bottom installation bottom cover of shell, the top of shell
Head cover, the centrally disposed screw thread mounting head for being useful for being assembled in the one outlet of the threeway of bottom cover are installed；Entire monitoring passes
Sensor is installed in the form of thread head, therefore being capable of secure makeup and reliable sealing；Assembling process is also very convenient；The present invention's
The enclosure sets gradually the pressure transmitter mounting blocks being fixedly mounted on bottom cover and from bottom to top for fixing
Hydrogen gas sensor on pressure transmitter mounting blocks is equipped with pressure transmitter on the pressure transmitter mounting blocks；It is described
Pressure transmitter includes pressure sensor and temperature sensor；The enclosure is equipped with the branch of L-type close to the position of head cover
Frame, the stent one side mounting circuit boards of L-type, opposite side are equipped with to supply for circuit board, pressure transmitter and hydrogen gas sensor
The dry cell of electricity；Pressure transmitter mounting blocks provide pressure transmitter and hydrogen gas sensor as support installation and three-port structure
Installation site, while also provided and oil for pressure transmitter and hydrogen gas sensor by the first liquid outlet and the second liquid outlet
Liquid contact is so as to the environment by gathering fluid parameter.
To sum up, the present invention can monitor pressure, temperature and the hydrogen in insulating sleeve in real time, can pass through pressure at the first time
Power changes to find defect, avoids further endangering；The present invention can also be in relatively low position (generally, fuel outlet is located at
4 meters of ground or more, sampling valve can accomplish the position consistent with operating personnel's height on ground by drawing down-sampling pipe) carry out oil
Sample gathers；Therefore, it is of the invention to there is effective and positive value in the security risk for monitoring and preventing few oily equipment explosion.
Description of the drawings
Fig. 1 is a kind of overall structure diagram of specific embodiment of the present invention；
Fig. 2 is partial enlarged view at the A of Fig. 1；
Fig. 3 is a kind of outside drawing of specific embodiment of the monitoring sensor of the present invention；
Fig. 4 is a kind of explosive view of specific embodiment of the monitoring sensor of the present invention；
Fig. 5 is a kind of structure diagram of specific embodiment of the shell of the monitoring sensor of the present invention；
Fig. 6 is a kind of structural representation of specific embodiment of the pressure transmitter mounting blocks of the monitoring sensor of the present invention
Figure；
Fig. 7 is the design sketch of another angle of pressure transmitter mounting blocks described in Fig. 6；
Fig. 8 is the pressure transmitter mounting blocks of the present invention and the decomposition texture schematic diagram of hydrogen gas sensor；
Fig. 9 is the structure diagram of another angle of Fig. 8；
Figure 10 is a kind of circuit structure block diagram of specific embodiment of the display instrument on the spot of the present invention；
Figure 11 is a kind of circuit structure block diagram of specific embodiment of the monitoring sensor of the present invention；
Figure 12 is a kind of structure diagram of preferred embodiment of the present invention；
Figure 13 is a kind of structure diagram of preferred embodiment of the hydrogen gas sensor of the present invention；
Figure 14 is a kind of structure diagram of preferred embodiment of the pressure transmitter of the present invention.
Reference sign：
1- insulating sleeves, 2- fuel outlets, 3- monitoring sensors, 4- threeways, 5- draw down-sampling pipe, and 6- Sampler valves, 7- is just
Ground display instrument, 8- wireless communication modules, 9- background computers, 10- switch valves, 11- tops grading shield, 12- liquid level gauges, 13-
Monitor sensor；
81- housings, 82- cable connectors, 83- pressure sensors, 84- blind pipes, 85- temperature-sensing elements, 86- pipe plugs, 87-
Cecum portion, 88- force samples circuit modules；
101- shells, 102- screw thread mounting heads, 103- intercommunicating pores, 104- bottom surfaces mounting hole, 105- sides mounting hole, 106-
Circuit board, 107- stents, 108- dry cells, 109- hydrogen gas sensors, 110- connector sockets, 111- pressure transmitter mounting blocks,
112- bottom covers, 113- head covers, 114- battery compartments, 115- stent mounting holes, 116- assembling framves, 117- baffles, 118- pressure invertings
Device, 119- bottom surfaces mounting hole, 120- internal thread holes；
304- temperature sensors, 305- pressure sensors, 307- wireless modules, 308- wire connection terminals, 309- dry cells,
310-CPU, 311- hydrogen gas sensor, 312- signal processing modules；
711- alarms, 712- controllers, 713- displays, 714- wireless communication modules, 715- ambient humidity sensors,
716- environment temperature sensors；
901- hydrogen gas sensor shells, 902- gas detection cells, 903- gas diffusion membranes, 904- sealing elements, 905- works
Make electrode reaction gas chamber, 906- storage oxygen space, 911- main bodys, 912- covers, 913- sealing rings, 914- recesses, 915- first inserts
Pin, the second contact pins of 916-, the 3rd contact pins of 917-, 921- electrolyte layers, 922- working electrodes, 923- is to electrode, 924- references electricity
Pole, 925- working electrode leads, 926- is to contact conductor, 927- reference electrode leads；
The main inlet openings of 1111-, 1112- fastener holes, 1113- pressure transmitter assembly holes, the first fluid holes of 1114-, 1115-
Second fluid hole, 1116- hydrogen gas sensors detection entrance.
Specific embodiment
The specific embodiment of the invention is described with reference to the accompanying drawings and embodiments：
As shown in Fig. 1~14, it illustrates the specific embodiment of the present invention, as shown in the figure, power transformation disclosed by the invention
The on-line monitoring system for few oily equipment of standing, few oily equipment include fuel outlet, include one on the fuel outlet
Threeway 4；One entrance of threeway is connected with the fuel outlet (passing through flange), and monitoring is separately installed in two outlets of threeway
Sensor 3 and draw down-sampling pipe 5；Draw down-sampling pipe to extend downwardly, and draw the end installation Sampler valves 6 of down-sampling pipe；It is described
It is equipped with to switch entrance in threeway and two exports the switch valve 10 being respectively turned on；
The monitoring sensor includes the shell 101 of cylinder type, the bottom installation bottom cover 112 of shell, the top of shell
Portion is installed by head cover 113, the centrally disposed screw thread mounting head 102 for being useful for being assembled in the one outlet of the threeway of bottom cover；Institute
It states enclosure and sets gradually the pressure transmitter mounting blocks 111 being fixedly mounted on bottom cover from bottom to top and for fixing
Hydrogen gas sensor 109 on pressure transmitter mounting blocks is equipped with pressure transmitter on the pressure transmitter mounting blocks
118；The pressure transmitter includes pressure sensor and temperature sensor；The enclosure is equipped with close to the position of head cover
The stent 107 of L-type, the stent one side mounting circuit boards 106 of L-type, opposite side be equipped be used for for circuit board, pressure transmitter and
The dry cell 108 of hydrogen gas sensor power supply；
The screw thread mounting head is introduced fluid in pressure transmitter mounting blocks 111 by the intercommunicating pore 103 that center opens up
Portion, sets triplate line in the pressure transmitter mounting blocks 111, and the entrance of triplate line is the intercommunicating pore, triplate line
Two outlet be respectively the first fluid hole 1114 and the second fluid hole 1115；
The side of the pressure transmitter mounting blocks offers the pressure transmitter assembly hole for stacking pressure transmitter
1113, the bottom centre of pressure transmitter assembly hole is first fluid hole；The top surface of the pressure transmitter mounting blocks
It is connected with the hydrogen gas sensor, and second fluid hole is opened in the top surface and and hydrogen of the pressure transmitter mounting blocks
Sensor detection entrance 1116 connects；
The circuit board includes CPU310 and wireless module 307；
The display instrument wireless telecommunications on the spot of the wireless module and monitoring sensor external；The display instrument on the spot and distal end
Background computer 9 pass through wireless communication module (8,714) wireless telecommunications.
Preferably, as shown in Figure 10：The display instrument on the spot includes controller 712, display 713, alarm 711 and uses
In the wireless communication module (8,714) communicated with background computer；The controller and the display, alarm and channel radio
Interrogate module connection；The display instrument on the spot also includes power module, the environment temperature sensor being connected with controller 716 and ring
Border humidity sensor 715；The wireless communication module is 433MHz wireless communication modules.The display instrument on the spot is underlying cabinet type
Display instrument on the spot, bottom sets having heaters, in order to the heating under the extremely cold weather in Xinjiang；The heating module of heater with
Controller connects.
Preferably, as shown in Figure 10：The controller of the display instrument on the spot includes amplification circuit module, arm processor, number
Word analog converter, voltage current adapter and electric current galvanostat；The controller pressure sensing next by sensor passes are monitored
Device, temperature sensor, the signal of hydrogen gas sensor carry out signal amplification, amplified signal by built-in amplification circuit module
It is calculated by the arm processor；The signal data being calculated is converted into voltage signal by digital analog converter,
Then current signal is changed by the voltage current adapter, current signal by after electric current galvanostat by showing on the spot
The wireless communication module of instrument is transmitted and shown by display.Display instrument can at most connect sampling module (monitoring sensing on the spot
Device) 128 or even it can be extended to 256, display instrument (repeater) on the spot is installed by each substation.It is recyclable aobvious
Show the data of each pressure for monitoring sensor, temperature and dissolved hydrogen, data processing is wirelessly transmitted to backstage and (calculates after integrating
Machine) server.
Preferably, as shown in figure 11：Wire connection terminal 308 is provided on the circuit board of the monitoring sensor, is wrapped on circuit
Containing CPU, wireless communication module and signal processing module 312；The CPU is msp430g2433, wireless chip si4432；
The enclosure is provided with semicircular assembling frame 116 above hydrogen gas sensor, assembles and be provided with to be embedded in frame
The battery compartment 114 of single dry cell, the both sides for assembling the top surface of frame are provided with to fix the stent mounting hole of the L-type support
115, the dry cell is located in the battery compartment between L-type support and assembling frame.In the present embodiment, CPU and wireless chip
It is low-power consumption component, contributes to the long-time service of equipment, without external electricity, the production environment of suitable substation.Especially when
During positioned at eminence, external power supply is difficult；Therefore monitoring sensor transmits for low-consumption wireless；Display instrument is using wireless on the spot
Transmission, power supply can also use accumulator, the puzzlement for avoiding external electricity inconvenient.The structure of assembling frame reliably secures dry electricity
Pond and the stent of L-type；The stent of L-type is by circuit board and battery secure makeup and separation；The bottom of frame is assembled by barrier partitions,
It can so separate with the sensor of bottom；The orientation such as up and down used when this specification describes be according to shown position or
Person monitors vertically-mounted position when sensor is installed to describe；It is not the specific restriction to structure, as long as relative position is not
Just technical scheme and technique effect can be realized.
Preferably, as shown in the figure：The system acquisition amount includes oil pressure, temperature, battery capacity and dissolving hydrogen content；System
After system starts, system is first configured, and the power supply of dry cell is closed after setting up, and wireless module and cpu enter dormant state, when
When there is wireless wake-up signal in outside, wireless module is waken up by cpu, and wireless module is arranged to wake state by cpu again, opens dry electricity
The power supply in pond gathers each parameter, and is sent to display instrument on the spot, after finishing system dormancy again.The controlling party of the present embodiment
Formula so that consuming energy for monitoring Sensor section is low, can reach more than reliable 3 years power-on times.
Preferably, as shown in figs. 3 to 9：The shell be provided with close to the side of bottom and top for fixed bottom cover and
The side mounting hole 105 of head cover；Corresponding, the outer surface of the part of the bottom cover and head cover insertion enclosure offers and institute
State the internal thread hole 120 of side fixed block location matches；It offers to fix the pressure transmitter installation on the bottom cover
The threaded hole of block, the threaded hole are bottom surface mounting hole (104,119)；The bottom surface mounting hole is uniformly distributed four；It is corresponding,
The bottom surface of the pressure transmitter mounting blocks is also provided with positioned at fastener hole 1112 matched with bottom surface mounting hole.Side mounting hole
Side fixation can save positive space of planes, while uniformly distributed mounting hole can be reliably fixed.
Preferably, as shown in figs. 3 to 9：The housing of the hydrogen gas sensor, the housing of pressure transmitter and the shell are
Copper material；Copper material provides reliable shielding properties.The switch valve 10 be hand-operated valve, the valve handle of the hand-operated valve
On be provided with rotating mark；The pressure sensor uses range as 0~0.5MPa, and precision is 0.1 grade, and temperature is -40~80
The absolute pressure transducer of degree；The temperature sensor uses A grades of Pt100 platinum resistance, and precision is 0.1 degree；The hydrogen sensing
Device uses technical grade fuel cell gas sensor, operating temperature：- 40-80C °, 0-2000 microlitres/liter of detection range, detection essence
Degree：± 10% or ± 20 microlitres/liter.
Preferably, as shown in figure 12：Few oily equipment includes fuel outlet for bottom and top includes liquid level gauge 12
Few oil equipment；The housing side of the liquid level gauge offers to install the casing of monitoring sensor；Described sleeve pipe is set with few oil
The fluid of standby inner top connects, and the liquid level gauge includes floating ball structure；One end of floating ball is placed in fluid, and the floating ball other end passes through
The lifting of floating ball and rotate, rotation process drive magnetic connection liquid level gauge indicators turn.Thus, monitor pressure simultaneously up and down
Power, temperature and hydrogen are capable of providing reliable data, and instant science accurately finds defect, avoids losing.The present embodiment discloses
Liquid level gauge structure for mechanical principle, without wiring, for monitoring sensor equally without wiring, there is no need to eminences to take electricity, prevents
Only security risk so that scheme disclosed in the present embodiment is more practical reliable.Few oil of top liquid level gauge lower part fuel outlet is set
It is standby to may be referred to high-tension insulating bushing；Few oil equipment refers to the kind equipment filled with insulation fluid, and the kind equipment is due to fluid
It is less, lack effective detection means at present, be all to take out the regular artificial detection of oil sample from the sampling valve of fuel outlet.
Preferably, as shown in figure 14：The pressure transmitter includes housing 81, is sealedly attached to the housing upper port
Cable connector 82, be fixed on the in vivo temperature sensor and pressure sensor 83 of shell, the temperature sensor, pressure sensor
Signal output part is electrically connected with the cable connector；The temperature sensor is passed by blind pipe and the temperature being fixed in the blind pipe
Sensing unit 85 is formed, and the nozzle of blind pipe is sealed and is fixedly connected with the casing by pipe plug, and the signal of the temperature-sensing element 85 is defeated
Pipe plug 86 is electrically connected with cable connector described in outlet hermetically passing, the cecum portion of blind pipe from the lower port of housing extend housing it
The fluid of first liquid outlet described in outer contacting；The pressure sensitive face of the pressure sensor is gone out by the lower port of housing with first
The fluid contact of liquid mouth；The longitudinal section of the pressure sensor is inverted U-shaped.The knot of pressure transmitter disclosed in the present embodiment
Structure installs the temperature sensor, pressure sensor in the housing concentratedly, and will be built-in with the blind of temperature-sensing element
Tube end extends the lower port and ring for passing through housing outside housing, by pressure sensor pressure sensitive face from the lower port of housing
Border communicates；Therefore under the premise of temperature, pressure measurement control is ensured so that structure is compacter, greatly reduces installation space,
Facilitate installation maintenance work.
Preferably, as shown in figure 13：The hydrogen gas sensor includes hydrogen gas sensor shell 901, is sensed in the hydrogen
Gas detection cell 902 is installed in device shell, the gas detection cell include electrolyte layer 921 and with the electrolyte
Layer be combined into one working electrode 922, to electrode 923 and reference electrode 924；In the hydrogen gas sensor shell described in
The one side of working electrode is equipped with gas diffusion membrane 903, passes through sealing element between the gas diffusion membrane and the working electrode
904 sealings form the working electrode reaction gas chamber 905 to react for hydrogen on the working electrode, the gas diffusion
Film is the gas diffusion membrane of non-porous structure, and the electrolyte layer is solid-state electrolyte layer or semisolid electrolyte layer；The hydrogen
Sensor outer housing includes the main body 911 with opening and covers the cover 912 for the opening for being located at the main body, the side of the cover
Sealing ring 913 is provided on wall, the inner wall of the opening of the hydrogen gas sensor shell is formed with to match with the sealing ring
Recess 914；The working electrode is located at the one side of the electrolyte layer, described to be located at the electrolysis to electrode and reference electrode
The opposite side of matter layer and described electrode and reference electrode are set up in parallel in the opposite side of the electrolyte layer.The present embodiment discloses
Hydrogen gas sensor can more effectively detect low-concentration hydrogen, response is fast, can tackle the hydrogen detection under harsh environment.
The preferred embodiment for the present invention is explained in detail above in conjunction with attached drawing, but the invention is not restricted to above-mentioned implementations
Mode, within the knowledge of a person skilled in the art, can also be on the premise of present inventive concept not be departed from
It makes a variety of changes, these variations are related to correlation technique well-known to those skilled in the art, these both fall within patent of the present invention
Protection domain.
Many other changes and remodeling can be made by not departing from the spirit and scope of the present invention.It should be appreciated that the present invention is not
It is limited to specific embodiment, the scope of the present invention is defined by the following claims.
Claims (10)
1. the on-line monitoring system of the few oily equipment of substation, few oily equipment includes fuel outlet, it is characterised in that：Include installation
A threeway on the fuel outlet；One entrance of threeway is connected with the fuel outlet, in two outlets of threeway respectively
Monitoring sensor is installed and draws down-sampling pipe；Draw down-sampling pipe to extend downwardly, and draw the end installation sampling valve of down-sampling pipe
Door；It is equipped with to switch entrance in the threeway and two exports the switch valve being respectively turned on；
The monitoring sensor includes the shell of cylinder type, the bottom installation bottom cover of shell, and head cover is installed at the top of shell,
The centrally disposed screw thread mounting head for being useful for being assembled in the one outlet of the threeway of bottom cover；The enclosure is from bottom to top
Set gradually the pressure transmitter mounting blocks being fixedly mounted on bottom cover and for being fixed on pressure transmitter mounting blocks
Hydrogen gas sensor, pressure transmitter is installed on the pressure transmitter mounting blocks；The pressure transmitter is passed comprising pressure
Sensor and temperature sensor；The enclosure is equipped with the stent of L-type, the stent one side installation of L-type close to the position of head cover
Circuit board, opposite side are equipped with the dry cell for powering for circuit board, pressure transmitter and hydrogen gas sensor；
The screw thread mounting head is introduced fluid inside pressure transmitter mounting blocks by the intercommunicating pore that center opens up, the pressure
Triplate line is set in transmitter mounting blocks, and the entrance of triplate line is the intercommunicating pore, and two outlets of triplate line are distinguished
For the first fluid hole and the second fluid hole；
The side of the pressure transmitter mounting blocks offers the pressure transmitter assembly hole for stacking pressure transmitter, pressure
The bottom centre of transmitter assembly hole is first fluid hole；The top surface of the pressure transmitter mounting blocks and the hydrogen
Sensor connects, and second fluid hole is opened in the top surface of the pressure transmitter mounting blocks and is detected with hydrogen gas sensor
Entrance connects；
The circuit board includes CPU and wireless module；
The display instrument wireless telecommunications on the spot of the wireless module and monitoring sensor external；After the display instrument on the spot and distal end
Platform computer passes through wireless communication module wireless telecommunications.
2. the on-line monitoring system of the few oily equipment of substation as described in claim 1, it is characterised in that：The display instrument on the spot
Include controller, display, alarm and wireless communication module for being communicated with background computer；The controller with it is described
Display, alarm are connected with wireless communication module；The display instrument on the spot also includes power module, is connected with controller
Environment temperature sensor and ambient humidity sensor；The wireless communication module is 433MHz wireless communication modules.
3. the on-line monitoring system of the few oily equipment of substation as claimed in claim 2, it is characterised in that：The display instrument on the spot
Controller include amplification circuit module, arm processor, digital analog converter, voltage current adapter and electric current galvanostat；
Controller by monitor sensor passes come pressure sensor, temperature sensor, hydrogen gas sensor signal pass through it is built-in
Amplification circuit module carries out signal amplification, and amplified signal is calculated by the arm processor；The signal being calculated
Data are converted into voltage signal by digital analog converter, and then changing into electric current by the voltage current adapter believes
Number, current signal by the wireless communication module transmission of display instrument on the spot after electric current galvanostat and by display by showing
Show.
4. the on-line monitoring system of the few oily equipment of substation as described in claim 1, it is characterised in that：The monitoring sensor
Circuit board on be provided with wire connection terminal, CPU, wireless communication module and signal processing module are included on circuit；The CPU be for
Msp430g2433, wireless chip si4432；The enclosure is provided with semicircular group above hydrogen gas sensor
It shelves, assembles and be provided with to be embedded in the battery compartment of single dry cell in frame, the both sides for assembling the top surface of frame are provided with for solid
The stent mounting hole of the fixed L-type support, the dry cell are located in the battery compartment between L-type support and assembling frame.
5. the on-line monitoring system of the few oily equipment of substation as claimed in claim 4, it is characterised in that：The system acquisition amount
Include oil pressure, temperature, battery capacity and dissolving hydrogen content；After system starts, system is first configured, and is closed after setting up dry
The power supply of battery, wireless module and cpu enter dormant state, and when there is wireless wake-up signal in outside, wireless module is waken up by cpu
Come, wireless module is arranged to wake state by cpu again, opens the power supply of dry cell, is gathered each parameter, and is sent to and shows on the spot
Show instrument, after finishing system dormancy again.
6. the on-line monitoring system of the few oily equipment of substation as described in claim 1, it is characterised in that：The shell is the bottom of close to
The side at portion and top is provided with the side mounting hole for fixed bottom cover and head cover；It is corresponding, the bottom cover and head cover insertion
The outer surface of the part of enclosure offers the internal thread hole with the side fixed block location matches；It is opened up on the bottom cover
It is useful for fixing the threaded hole of the pressure transmitter mounting blocks, the threaded hole is bottom surface mounting hole；The bottom surface mounting hole
For uniformly distributed four；Corresponding, the bottom surface of the pressure transmitter mounting blocks is also provided with positioned at matched tight with bottom surface mounting hole
Solid hole.
7. the on-line monitoring system of the few oily equipment of substation as described in claim 1, it is characterised in that：The hydrogen gas sensor
Housing, the housing of pressure transmitter and the shell are copper material；The switch valve is hand-operated valve, the hand-operated valve
Rotating mark is provided on valve handle；The pressure sensor uses range as 0~0.5MPa, and precision is 0.1 grade, and temperature is -40
~80 degree of absolute pressure transducer；The temperature sensor uses A grades of Pt100 platinum resistance, and precision is 0.1 degree；The hydrogen
Sensor uses technical grade fuel cell gas sensor, operating temperature：- 40-80 DEG C, 0-2000 microlitres/liter of detection range, inspection
Survey precision：± 10% or ± 20 microlitres/liter.
8. the on-line monitoring system of the few oily equipment of substation as described in claim 1, it is characterised in that：Few oily equipment is
Few oily equipment that bottom includes fuel outlet and top includes liquid level gauge；The housing side of the liquid level gauge offers to install
Monitor the casing of sensor；Described sleeve pipe is connected with the fluid of few oily equipment inner top, and the liquid level gauge includes floating ball structure；It is floating
One end of ball is placed in fluid, and the floating ball other end is rotated by the lifting of floating ball, and rotation process drives the liquid level of magnetic connection
Count indicators turn.
9. the on-line monitoring system of the few oily equipment of substation as described in claim 1, it is characterised in that：The pressure transmitter
Comprising housing, the cable connector of the housing upper port is sealedly attached to, the in vivo temperature sensor of shell is fixed on and pressure passes
Sensor, the temperature sensor, the signal output part of pressure sensor are electrically connected with the cable connector；The temperature sensor
It is made of blind pipe and the temperature-sensing element being fixed in the blind pipe, the nozzle of blind pipe, which is sealed by pipe plug and fixed with housing, to be connected
It connects, pipe plug described in the output line hermetically passing of the temperature-sensing element is electrically connected with cable connector, the cecum portion of blind pipe
Extend the fluid of the first liquid outlet described in the outer contacting of housing from the lower port of housing；The pressure sensitive of the pressure sensor
Face is contacted by the lower port of housing with the fluid of the first liquid outlet；The longitudinal section of the pressure sensor is inverted U-shaped.
10. the on-line monitoring system of the few oily equipment of substation as described in claim 1, it is characterised in that：The hydrogen sensing
Device includes hydrogen gas sensor shell, and gas detection cell is equipped in the hydrogen gas sensor shell, and the gas detection is single
Member includes electrolyte layer and the working electrode being combined into one with the electrolyte layer, to electrode and reference electrode；The hydrogen
Gas diffusion membrane, the gas diffusion membrane and the work are installed towards the one side of the working electrode in gas sensor shell
The working electrode to be formed and reacted for hydrogen on the working electrode is sealed between electrode by sealing element and reacts gas chamber,
The gas diffusion membrane is the gas diffusion membrane of non-porous structure, and the electrolyte layer is solid-state electrolyte layer or semisolid electrolyte
Layer；The hydrogen gas sensor shell is located at the cover of the opening of the main body, the lid comprising the main body with opening and lid
Sealing ring is provided on the side wall of body, the inner wall of the opening of the hydrogen gas sensor shell is formed with and the sealing ring phase
The recess matched somebody with somebody；The working electrode is located at the one side of the electrolyte layer, described to be located at the electrolysis to electrode and reference electrode
The opposite side of matter layer and described electrode and reference electrode are set up in parallel in the opposite side of the electrolyte layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711381994.6A CN108051032A (en) | 2017-12-20 | 2017-12-20 | The on-line monitoring system of the few oily equipment of substation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711381994.6A CN108051032A (en) | 2017-12-20 | 2017-12-20 | The on-line monitoring system of the few oily equipment of substation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108051032A true CN108051032A (en) | 2018-05-18 |
Family
ID=62130328
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711381994.6A Pending CN108051032A (en) | 2017-12-20 | 2017-12-20 | The on-line monitoring system of the few oily equipment of substation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108051032A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108896868A (en) * | 2018-06-21 | 2018-11-27 | 云南电网有限责任公司昭通供电局 | One kind is monitored on-line with formula and realizes system and method |
| CN108956957A (en) * | 2018-08-20 | 2018-12-07 | 国网陕西省电力公司电力科学研究院 | A kind of hydrogen gas sensor for oil dissolved gas detection |
| CN109633396A (en) * | 2019-01-29 | 2019-04-16 | 武汉思融科技有限公司 | A kind of apparatus insulated defect on-line monitoring system of the few oil of electric power and method |
| CN109884488A (en) * | 2019-04-11 | 2019-06-14 | 苏州正秦电气有限公司 | A kind of bushing shell for transformer online oil monitoring device collector |
| CN110060858A (en) * | 2019-04-11 | 2019-07-26 | 国网辽宁省电力有限公司电力科学研究院 | Oil-immersed current transformer internal abnormality judgment means based on accurate oil pressure acquisition method |
| CN112001307A (en) * | 2020-08-24 | 2020-11-27 | 西安亚能电气有限责任公司 | Monitoring system based on sulfur hexafluoride density relay pointer image recognition |
| CN112344986A (en) * | 2020-09-29 | 2021-02-09 | 中国电力科学研究院有限公司 | Temperature and pressure integrated real-time sensing device for oil-immersed paper insulating sleeve |
| CN112885066A (en) * | 2021-01-15 | 2021-06-01 | 西安亚能电气有限责任公司 | Transformer substation oil-shortage equipment monitoring system based on wireless intelligent sensor |
| CN113447085A (en) * | 2021-09-01 | 2021-09-28 | 中国电力科学研究院有限公司 | Online monitoring device for hydrogen content, pressure and temperature of oil in oil equipment |
| CN113740110A (en) * | 2021-09-26 | 2021-12-03 | 西安亚能电气有限责任公司 | Little oily equipment dissolved hydrogen monitoring system based on many sensing fusion techniques |
| CN114563450A (en) * | 2022-03-01 | 2022-05-31 | 国网新疆电力有限公司电力科学研究院 | Transformer substation insulating sleeve hydrogen content on-line monitoring system |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2204448A1 (en) * | 1997-05-05 | 1998-11-05 | Edge Systems Canada Inc. | Well emulsion stream sampler |
| CN202281733U (en) * | 2011-10-14 | 2012-06-20 | 秦川机床集团宝鸡仪表有限公司 | Multi-parameter on-line monitoring device for sulfur hexafluoride gas |
| CN102623900A (en) * | 2012-04-01 | 2012-08-01 | 江苏波瑞电气有限公司 | Intelligent two-way sleeve for monitoring pressure, temperature and moisture on line in real time |
| CN202485940U (en) * | 2012-03-02 | 2012-10-10 | 山西省电力公司电力科学研究院 | Oil sampling device for transformer |
| CN103492840A (en) * | 2011-03-31 | 2014-01-01 | 品质控制有限责任公司 | Combined hydrogen and pressure sensor assembly |
| CN105510780A (en) * | 2015-11-27 | 2016-04-20 | 云南电网有限责任公司电力科学研究院 | Insulation testing system and method for insulating pull rod of SF6 high-voltage electric appliance |
| CN105934806A (en) * | 2014-01-22 | 2016-09-07 | Abb技术有限公司 | A device comprising a high voltage apparatus including a fluid and equipment for detecting one or more physical properties of the fluid |
| CN205981803U (en) * | 2016-08-16 | 2017-02-22 | 国网江西省电力公司电力科学研究院 | Gaseous accurate sampling device who detects of sulfur hexafluoride |
| CN206470229U (en) * | 2016-12-28 | 2017-09-05 | 深圳市普晟传感技术有限公司 | A kind of hydrogen gas sensor for quick detection low-concentration hydrogen |
-
2017
- 2017-12-20 CN CN201711381994.6A patent/CN108051032A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2204448A1 (en) * | 1997-05-05 | 1998-11-05 | Edge Systems Canada Inc. | Well emulsion stream sampler |
| CN103492840A (en) * | 2011-03-31 | 2014-01-01 | 品质控制有限责任公司 | Combined hydrogen and pressure sensor assembly |
| CN202281733U (en) * | 2011-10-14 | 2012-06-20 | 秦川机床集团宝鸡仪表有限公司 | Multi-parameter on-line monitoring device for sulfur hexafluoride gas |
| CN202485940U (en) * | 2012-03-02 | 2012-10-10 | 山西省电力公司电力科学研究院 | Oil sampling device for transformer |
| CN102623900A (en) * | 2012-04-01 | 2012-08-01 | 江苏波瑞电气有限公司 | Intelligent two-way sleeve for monitoring pressure, temperature and moisture on line in real time |
| CN105934806A (en) * | 2014-01-22 | 2016-09-07 | Abb技术有限公司 | A device comprising a high voltage apparatus including a fluid and equipment for detecting one or more physical properties of the fluid |
| CN105510780A (en) * | 2015-11-27 | 2016-04-20 | 云南电网有限责任公司电力科学研究院 | Insulation testing system and method for insulating pull rod of SF6 high-voltage electric appliance |
| CN205981803U (en) * | 2016-08-16 | 2017-02-22 | 国网江西省电力公司电力科学研究院 | Gaseous accurate sampling device who detects of sulfur hexafluoride |
| CN206470229U (en) * | 2016-12-28 | 2017-09-05 | 深圳市普晟传感技术有限公司 | A kind of hydrogen gas sensor for quick detection low-concentration hydrogen |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108896868A (en) * | 2018-06-21 | 2018-11-27 | 云南电网有限责任公司昭通供电局 | One kind is monitored on-line with formula and realizes system and method |
| CN108956957A (en) * | 2018-08-20 | 2018-12-07 | 国网陕西省电力公司电力科学研究院 | A kind of hydrogen gas sensor for oil dissolved gas detection |
| CN109633396A (en) * | 2019-01-29 | 2019-04-16 | 武汉思融科技有限公司 | A kind of apparatus insulated defect on-line monitoring system of the few oil of electric power and method |
| CN109884488A (en) * | 2019-04-11 | 2019-06-14 | 苏州正秦电气有限公司 | A kind of bushing shell for transformer online oil monitoring device collector |
| CN110060858A (en) * | 2019-04-11 | 2019-07-26 | 国网辽宁省电力有限公司电力科学研究院 | Oil-immersed current transformer internal abnormality judgment means based on accurate oil pressure acquisition method |
| CN112001307A (en) * | 2020-08-24 | 2020-11-27 | 西安亚能电气有限责任公司 | Monitoring system based on sulfur hexafluoride density relay pointer image recognition |
| CN112001307B (en) * | 2020-08-24 | 2023-12-15 | 西安亚能电气有限责任公司 | Monitoring system based on sulfur hexafluoride density relay pointer image recognition |
| CN112344986A (en) * | 2020-09-29 | 2021-02-09 | 中国电力科学研究院有限公司 | Temperature and pressure integrated real-time sensing device for oil-immersed paper insulating sleeve |
| CN112885066A (en) * | 2021-01-15 | 2021-06-01 | 西安亚能电气有限责任公司 | Transformer substation oil-shortage equipment monitoring system based on wireless intelligent sensor |
| CN113447085A (en) * | 2021-09-01 | 2021-09-28 | 中国电力科学研究院有限公司 | Online monitoring device for hydrogen content, pressure and temperature of oil in oil equipment |
| CN113740110A (en) * | 2021-09-26 | 2021-12-03 | 西安亚能电气有限责任公司 | Little oily equipment dissolved hydrogen monitoring system based on many sensing fusion techniques |
| CN114563450A (en) * | 2022-03-01 | 2022-05-31 | 国网新疆电力有限公司电力科学研究院 | Transformer substation insulating sleeve hydrogen content on-line monitoring system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108051032A (en) | The on-line monitoring system of the few oily equipment of substation | |
| KR20170023967A (en) | Data communication apparatus, system, and method | |
| CN206192402U (en) | Gaseous little water of SF6, density on -line monitoring system | |
| CN109633396A (en) | A kind of apparatus insulated defect on-line monitoring system of the few oil of electric power and method | |
| CN108956957A (en) | A kind of hydrogen gas sensor for oil dissolved gas detection | |
| CN103926299B (en) | Gas sensor | |
| CN211205670U (en) | Leakage monitoring device for hydraulic structure | |
| CN207423387U (en) | A kind of cable intermediate joint temperature based on temperature difference method rises on-Line Monitor Device | |
| CN201679496U (en) | Underground liquid level monitor for gas storage well | |
| CN204556594U (en) | Micro-moisture transmitter | |
| CN115540950B (en) | Transformer oil gas temperature online monitoring device and method | |
| CN218496819U (en) | Hydrogen flux monitoring probe | |
| CN208537339U (en) | Density relay and gas insulated enclosed combined electrical apparatus | |
| CN215491842U (en) | Transformer state monitoring system | |
| CN105628103B (en) | System for HVDC System Earth Pole state monitoring apparatus | |
| CN205642544U (en) | Atmospheric pressure conduction device and municipal drainage pipe network water position monitoring node | |
| CN208762578U (en) | A kind of cathodic protection potential detection device | |
| CN209215370U (en) | A kind of water body section water quality synchronous detecting instrument | |
| CN205977200U (en) | Water level detector | |
| CN208013304U (en) | Electrically-charging equipment grounding-for-lightning device portable detector | |
| CN214749561U (en) | SF (sulfur hexafluoride)6Density integrated monitoring device | |
| CN206470269U (en) | A kind of on-Line Monitor Device for transformer | |
| CN205861094U (en) | System for HVDC System Earth Pole state monitoring apparatus | |
| CN207570598U (en) | For the insulating sleeve monitoring device of the few oily equipment of substation | |
| CN203053914U (en) | Gas sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180518 |