CN107863272A - A kind of gas density relay for being provided with alarm holding structure - Google Patents
A kind of gas density relay for being provided with alarm holding structure Download PDFInfo
- Publication number
- CN107863272A CN107863272A CN201711224018.XA CN201711224018A CN107863272A CN 107863272 A CN107863272 A CN 107863272A CN 201711224018 A CN201711224018 A CN 201711224018A CN 107863272 A CN107863272 A CN 107863272A
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- China
- Prior art keywords
- density relay
- gas density
- bellows
- gas
- display
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
- H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
- H01H35/26—Details
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
- H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
- H01H35/26—Details
- H01H35/28—Compensation for variation of ambient pressure or temperature
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H35/00—Switches operated by change of a physical condition
- H01H35/24—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow
- H01H35/32—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by bellows
Abstract
The invention discloses a kind of gas density relay for being provided with alarm holding structure, including signaling gear and indicating value indication mechanism；Signaling gear includes bellows, the microswitch being opened or closed by bellows control, keeps the alarm holding structure of microswitch alarm condition；Indicating value indication mechanism includes：Display end seat, the display Baden pipe that one end is connected with display end seat, the movement and the pointer on movement driven on chassis, by the display Baden pipe of indicating value indication mechanism, and dial.Gas density relay provided by the invention, microswitch is made by maintaining body of alarming once alarming, it is maintained at alarm condition, until relevant staff adjusts resetting-mechanism manually, staff can be allowed to find electrical equipment arcing phenomenon, the electrical equipment of timely processing arcing phenomenon, ensure electric power safety operation.
Description
Technical field
The invention belongs to technical field of electric power, is related to a kind of sulfur hexafluoride gas density relay, more particularly to a kind of tool
There are signal maintaining body and resetting-mechanism, it is possible to achieve electrical equipment overpressure alarm keeps the gas density relay of function.
Background technology
At present, for pressing the sulfur hexafluoride gas of the sulfur hexafluoride gas density in sulfur hexafluoride electrical equipment in monitoring
The load cell that the signaling gear (signal control portion) of density monitor typically uses is Baden pipe, the contact used for magnetic
Help formula contact, its contact exist contact it is bad, the shortcomings that its resistance to shock difference, it is difficult to ensure the reliable and secure operation institute of power network
So that there is an urgent need to innovate.And many middle voltage electrical equipment are it is necessary to have the maintaining body after signalizing activity and resetting-mechanism,
A kind of high antivibration sulfur hexafluoride gas density relay of electrical equipment arcing overpressure alarm function can be realized, it is also desirable to create
Newly.And a kind of gas density relay of absolute pressure type is needed, it is suitably applied in middle voltage electrical field.
Arcing failure is the phenomenon that probability of happening is relatively low in switchgear, but still can not be avoided completely.Due to gas
It is sealing space inside density monitor, once arcing failure occurs, high pressure and height can be formed in equipment within a very short time
Temperature, high pressure can make the parts in equipment depart from its fixed structure and be raised, and high temperature can also make to produce in equipment fusing and
Evaporation Phenomenon, and Evaporation Phenomenon not only makes the pressure in equipment further raise, and can also produce poison gas, poison gas acts in pressure
Under discharge, the person of neighbouring staff can thus be caused greatly to endanger, gently then makes one to have a dizzy spell, weight
Then cause casualties.
In addition, device damage caused by arcing failure also can not be ignored, after gas density relay damage, electricity can be caused
Gas leak in gas equipment, electrical equipment normal operation is influenceed, and high temperature can also cause electrical equipment short-circuit, or even cause
Fire, in addition, user also needs to bear the expense of long-term shutdowns and accident treatment, therefore, arcing failure should try one's best and avoid.
At present, many gas density relays are provided with arcing overpressure alarm function, but when gas pressure in electrical equipment
After returning normal value, alarm can automatically terminate, and gas density relay continues normal work, and such staff is easy for forgetting
Note is overhauled in time, and after the multiple overpressure alarm of gas density relay, the probability of arcing failure can greatly improve, in the prior art
Yet there are no can effectively reduce the gas density relay of arcing failure.
The content of the invention
The present invention provides a kind of gas density relay provided with hand-reset structure, for solving existing middle pressure technology
The problem of can not keeping alarm condition after the sulfur hexafluoride gas density relay overpressure alarm in field.
The gas density relay provided by the invention for being provided with alarm holding structure, including signaling gear and indicating value are shown
Mechanism；
The signaling gear includes load cell bellows, the microswitch being opened or closed by bellows control,
Keep the alarm holding structure of the microswitch alarm condition；
The indicating value indication mechanism includes：Display end seat, the display Baden pipe that one end is connected with the display end seat, show
Show that the Baden pipe other end is connected on display base, display base is arranged on chassis, by indicating value indication mechanism by transition piece
The driving of display Baden pipe movement and the pointer on movement, and dial；
Wherein, the display Baden pipe is connected by the display base, transition piece with the bellows；The ripple
Pipe is connected by joint with electrical equipment.
In a preferred embodiment, the signaling gear also includes recovering the microswitch normal operating conditions
Resetting-mechanism, promotes and/or presses the resetting-mechanism, and resetting-mechanism promotes the alarm holding structure away from the fine motion
The movement arm of switch, microswitch recover normal operating conditions, and signal resets.
In a preferred embodiment, the gas density relay also includes sealed air chamber, and signaling gear and indicating value show
Show that mechanism is located inside the sealed air chamber, filled with compensation gas in the sealed air chamber.
In a preferred embodiment, the resetting-mechanism includes one the rod member with lever, and the rod member slidably connects
It is connected on the madial wall of the sealed air chamber.
In a preferred embodiment, the resetting-mechanism includes one the rod member with lever, the movable company of rod member
It is connected on the madial wall of the sealed air chamber.
In a preferred embodiment, the gas density relay also includes transition piece, and described transition piece one end is fixed
On chassis, the other end connects with display base, and is connected by the blow vent on chassis with bellows.
In a preferred embodiment, the gas density relay also includes temperature compensating element, the temperature-compensating
Element is compensation Baden pipe or compensation bellows, is connected with the display end seat, and connected with the sealed air chamber.
In a preferred embodiment, the gas density relay also includes temperature compensating element, the temperature-compensating
Element is bimetal leaf, is connected with the display end seat, is not connected with the bellows component.
In a preferred embodiment, be additionally provided with cover plate on the chassis, the cover plate cover the transition piece and/or
The blow vent, to seal the gas density relay.
In a preferred embodiment, the signaling gear also includes fixed mount, and the fixed mount is along the bellows group
Part telescopic direction extends, and the fixed mount is fixed on the chassis, and microswitch is located at the free end of the fixed mount.
In a preferred embodiment, the signaling gear also includes support, and the sealed end of the bellows is tightly connected
On the one side of the support.
In a preferred embodiment, the signaling gear also includes push rod, and the push rod is located at the outer of the bellows
Portion, extend along the telescopic direction of the bellows, the first end of the push rod is fixed on the bracket, and the second end, which is provided with, adjusts
Part fixed plate is saved, the free end of the regulating part fixed plate is provided with the regulating part for triggering the microswitch.
In a preferred embodiment, position-adjustable of the regulating part fixed plate on the push rod, passes through regulation
Position control of the regulating part fixed plate on the push rod triggers the pressure of the microswitch.
In a preferred embodiment, the signaling gear also includes spring, and one end of the spring is fixed on branch erection
Have on the side of push rod, the other end is adjustable on the outside of the push rod；Preferably, on the lateral surface of the push rod
Spring regulation fixture is arranged with, the spring is fixed on the spring regulation fixture, and adjusting fixture by spring adjusts
Save the elastic force of spring.
In a preferred embodiment, it is described be provided with alarm maintaining body gas density relay also include watchcase and
Housing, one end of the housing are fixedly connected on the chassis, and the other end is tightly connected with the watchcase, the watchcase, shell
Body and chassis surround the sealed air chamber.
In a preferred embodiment, the gas density relay for being provided with alarm maintaining body is additionally provided with temperature-sensitive bag,
The temperature of the temperature-sensitive bag detection compensation gas, and temperature data is processed into pressure data and shown on the display device.
In a preferred embodiment, the inside of the watchcase is additionally provided with least partly transparent watch crystal, the table glass
Glass is contacted with the housing along face, and the linear sealing of watchcase and housing has been changed into face sealing by the watch crystal, improves gas
The sealing of volume density relay.
The gas density relay provided by the invention for being provided with alarm maintaining body, by maintaining body of alarming, makes fine motion
Switch is maintained at alarm condition once alarming, until relevant staff adjusts resetting-mechanism manually, make microswitch
Movement arm recovers to normal operating conditions., being capable of overpressure alarm during its hypertonia i.e. when electrical equipment arcing.And when electricity
After gas equipment arcing terminates, when its pressure is normal, its alarm signal is always maintained at, and operations staff can be allowed to find electrical equipment
Arcing phenomenon, the electrical equipment of timely processing arcing phenomenon, ensure electric power safety operation.
Baden pipe is shown by the blow vent on display base transition piece and chassis, with bellows and electrical equipment
Connection.Sealed air chamber filled with compensation gas is surrounded by housing, chassis and watchcase, both ensure that the production of gas density relay
Product precision, gas density relay is set to show absolute pressure again, indicating value is free from the influence of the external environment.In addition, signaling gear and
Indicating value indication mechanism is entirely located in inside compensation gas, enhances the vibration resistance of gas density relay.Indicating value indication mechanism
The load cell of (display portion) uses Baden pipe, and bellows is used different from the load cell of display portion in the prior art,
Overcome that bellows displacement is small, is difficult to gamut display problem, can easily realize gas density relay
Gamut scope is shown, is particularly very easy to realize the display for being initiated with -0.1MPa, can shows vacuum when vacuumizing
Degree, it is very easy to popularization and application.And simultaneously, load cell is bellows used by its signaling gear (signal control portion),
To ensure the high resistance to shock of density monitor, and the contact used is microswitch, to ensure the reliable of density monitor
Electric property.
In addition, technical scheme can have up to 4 kinds of permutation and combination, as being filled with compensation gas, bottom in bellows
Disk is between bellows and joint or side；Air chamber compensation gas, chassis is between bellows and joint or side.It is aobvious
Show compensation：Bimetal leaf, or Baden pipe, or bellows；Display：Absolute pressure or relative pressure.
Temperature compensating element can be that display Baden pipe and/or display bellows, display Baden pipe connect with sealed air chamber
It is logical, it is internal filled with compensation gas, play a part of adjusting gas temperature in electrical equipment.Temperature compensating element can also be double
Sheet metal, do not connected with sealed air chamber, play a part of adjusting gas temperature in electrical equipment.
Wherein, compensation gas can be that sulfur hexafluoride gas, sulfur hexafluoride gas mixture, nitrogen, compressed air etc. are various
Gas.
Display base is fixed on chassis, or the display base is fixed on bottom plate.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, required in being described below to embodiment
The accompanying drawing used is briefly described, it should be apparent that, drawings in the following description are some embodiments of the present invention, right
For those of ordinary skill in the art, without having to pay creative labor, it can also be obtained according to these accompanying drawings
Other accompanying drawings；
Fig. 1 is the partial cutaway schematic for the gas density relay that the embodiment of the present invention one is provided with alarm holding structure；
Fig. 2 is the not operating shape of gas density relay alarm signal that the embodiment of the present invention one is provided with alarm holding structure
State explanation figure；
Fig. 3 is the gas density relay alarm signal action holding that the embodiment of the present invention one is provided with alarm holding structure
State principle explanation figure；
Fig. 4 is the gas density relay alarm signal action reset that the embodiment of the present invention one is provided with alarm holding structure
Principle of Process explanation figure；
Fig. 5 is the partial cutaway schematic for the gas density relay that the embodiment of the present invention two is provided with alarm holding structure.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in conjunction with the embodiment of the present invention
In accompanying drawing, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is
Part of the embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, ordinary skill people
The every other embodiment that member is obtained under the premise of creative work is not made, belongs to the scope of protection of the invention.
Fig. 1 is the partial cutaway schematic of the high antivibration gas density relay of the embodiment of the present invention one, as shown in Fig. 1,
The high antivibration gas density relay of the embodiment of the present invention one includes：The sealed air chamber that housing 10, watchcase 12 and chassis 8 surround,
Inside sealed air chamber, the signaling gear that gas circuit interconnects and indicating value indication mechanism, signaling gear pass through chassis
8 connect with being connected the joint 2 of sulfur hexafluoride electrical equipment, and joint 2 is located at the middle part on chassis 8.
Because the sealed air chamber of high antivibration gas density relay provided by the invention is hermetically sealed, thus the density after
Electrical equipment is absolute pressure type density monitor, and its indicating value is shown as absolute pressure, and signal is also absolute pressure, not by height above sea level shadow
Ring.
Signaling gear includes the bellows 9 of gas density in detection sulfur hexafluoride electrical equipment, as some micro- of contact
Dynamic switch 32, and support 38, push rod 27, push rod guide 30, fixed mount 31, some regulating parts 29, regulating part fixed plate
28.One end of bellows 9 is fixed on chassis 8, and is connected by chassis 8, the connector 5 on chassis 8 with joint 2,
And connected by joint 2 with sulfur hexafluoride electrical equipment.The other end sealing welding of bellows 9 is in a side of support 38
On, bellows 9, chassis 8 and support 38 surround the chamber connected with electrical equipment, for detecting the pressure of electrical equipment.Push rod
27 are arranged on the another side relative with bellows 9 of support 38, and push rod 27 passes through push rod guide 30, and is stretched along bellows 9
The direction movement of contracting.Push rod guide 30 is fixed on fixed mount 31, and fixed mount 31 is fixed on chassis 8, and fixed mount 31 plays branch
The effect of jackstay guide 30.
Microswitch 32 is fixed on fixed mount 31 or chassis 8, and the position of microswitch 32 can be arranged on bellows 9
Outside, further reduce the thickness of density monitor.One end of regulating part fixed plate 28 is fixed on push rod 27, and the other end hangs
Sky, plane and the central axis of push rod 27, some regulating parts 29 where at least part regulating part fixed plate 28 are fixed on tune
Save in part fixed plate 28, during gas pressure change in bellows 9, push rod 27 moves in left-right direction with bellows 9, push rod
27 drive regulating part fixed plate 28, and regulating part fixed plate 28 drives regulating part 29 to contact or disconnect with microswitch 32, with triggering
Or microswitch 32 is disconnected, and the pressure signal of electrical equipment is sent to outside by junction block, wherein, left and right direction and figure
Direction in 1 is consistent, and the sealing of wire outlet seat 40 is fixed on chassis 8 or housing.Regulating part fixed plate 28 can be a plane,
It can be the multistage face provided with kink, be mainly used in the triggering microswitch 32 under the drive of push rod 27 and act.The indicating value
Indication mechanism includes：Show Baden pipe 25, display end seat 20, movement 23, dial 19, pointer 22 and display base 16；It is described
One end of display Baden pipe 25 is welded on the display end seat 20, and the other end of the display Baden pipe 25 is welded on described show
Show on pedestal 16, the pointer 22 is installed on the movement 23.
Further, indication mechanism can also include temperature compensating element, and temperature compensating element can be display Baden pipe
And/or bellows, or bimetal leaf.When temperature compensating element is shows Baden pipe, Baden pipe and blanket gas are shown
Room is connected, and temperature compensation function is played to indicating value indication mechanism.When temperature compensating element is bimetal leaf, bimetal leaf with
Sealed air chamber does not connect, and the compensation gas in bimetal leaf and sealed air chamber plays temperature-compensating to indicating value indication mechanism jointly
Effect.
In addition, high antivibration gas density relay provided by the invention also includes transition piece 11, transition piece 11 is hollow knot
Structure, the sealing of transition piece 11 are fixed on chassis 8, and one end connects with the blow vent 41 that chassis 8 is provided with, the other end and display base
Seat 16 is fixedly connected, and is connected by display base 16 with display Baden pipe 25.In addition, display base 16 can also be with transition
The integrated design of part 11, is fixed on chassis 8 jointly.I.e. Baden pipe 25, bellows 9 and electrical equipment are interconnected, and pass through ripple
Compensation gas collective effect in line pipe 9, Baden pipe 25 and sealed air chamber, the pressure of gas in electrical equipment is detected, it is this
Design and to detect that the pressure precision of gas is higher, and due to filled with compensation gas, can further reduce in sealed air chamber
Each component improves the stabilization of gas density relay due to being rocked caused by itself or extraneous other factors in sealed air chamber
Property and vibration resistance, and need not be filled with liquid oil medium in high antivibration gas density relay dial plate provided by the invention.
The high antivibration gas density relay of the embodiment of the present invention one also includes：Spring 39, spring 39 are nested on push rod 27, spring
39 one end leans against support 38, and the other end of spring 39 is leaned against on push rod guide 30.
Cover plate 7 corresponding with blow vent 41 is additionally provided with chassis 8, cover plate 7 is used to completely cut off gas density relay and the external world
Air, improve the sealing of product.Joint 2 is fixed on chassis 8 directly or by connecting tube 5.Display base 16, transition piece
11st, bellows 9 and joint 2 are mutually ventilated so that density monitor communicates with electrical equipment in gas circuit.
On chassis 8, the other end of housing 10 contacts one end sealing welding of housing 10 with the face of watch crystal 14, is formed close
Seal air chamber.The signaling gear and indicating value indication mechanism are all sealed in sealed air chamber, filled with compensation gas in sealed air chamber
Body, the compensation gas rises to signaling gear and indicating value indication mechanism respectively temperature compensation function.The watchcase front is transparent
Watch crystal.The outside of watch crystal 14 is additionally provided with metal shell 12, further improves the sealing of product, and fixed watch crystal
14 and housing 10.Existing gas density relay does not have watch crystal 14, the only seal casinghousing 10 of Pictest shell 12, but due to watchcase
12 is relatively thin, and the position difficulty of processing coefficient contacted with housing 10 is big, and flatness is inadequate, therefore, existing gas density relay
Easily occur gas leakage, but the present invention is by adding watch crystal 14, by contact surface by the edge transitions of watchcase 12 to housing 10
Inside, and the deep processing of housing 10 is relative is easier, and therefore, the sealing of gas density relay provided by the invention is more
It is good.
Signaling gear and indicating value indication mechanism are all sealed in a sealed air chamber by the present invention, are filled in sealed air chamber
There is compensation gas, the compensation gas plays temperature compensation function to signaling gear and indicating value indication mechanism respectively.
The gas density relay for being provided with alarm holding structure of the embodiment of the present invention one can also include temperature-sensitive bag, institute
State compensation gas and be connected by connecting tracheae with temperature-sensitive bag.The wire outlet seat 40 is fixed on chassis 8 or housing；Or outlet
Seat 40 is provided with anti-vibration part, and wire outlet seat 40 is fixed on anti-vibration part, and anti-vibration part is fixed on chassis 8 or housing.The anti-vibration part is
Bellows is made up of the thin plate of anti-vibration function.And the connecting line of wire outlet seat 40 is connected with microswitch 32, and wire outlet seat 40
Connecting line is connected on the junction block or cable outside housing.The watch crystal 12 is fixed on the housing 10, nested outside watch crystal
There is table cover.Gas tube on chassis 8 or housing.Corresponding compensation gas can be filled with to sealed air chamber by gas tube.
The housing is separation type, and housing component is sealed using sealing ring 13, or welded seal.The housing is separation type, and housing 1 is
Stainless steel 10, housing 2 are that aluminium 12, housing 1 and housing 2 are sealed using sealing ring 13.Watch crystal uses sealing ring with housing 2
Sealing, stainless steel table cover is covered with the outer surface of housing 2 and watch crystal, the outer wrap of sealed air chamber has heat-insulation layer.It is located at
Housing outside the seal cavity, the anti-vibration pad of antivibration is provided between the chassis 8 and the housing.
In order to further improve the resistance to shock of gas density relay, in addition to prevent from malfunctioning mechanism, prevent malfunction
Make mechanism to be made up of locating part 42.Locating part 42 plays spacing, positioning action to the part of signaling gear, prevents signaling gear
Part swing, rock in impact vibrated, play improve antivibration ability.
Further, holding structure 43 of alarming is an elastomeric element, and one end is fixedly mounted on the madial wall on chassis 8, separately
One end is hanging, is free end, and at an angle with the madial wall shape on chassis 8.When reaching the pressure or density of setting, regulation
Part 29 promotes the movement arm 321 of microswitch 32 to be moved to close to the direction of microswitch 32, and to the madial wall side on chassis 8
To extruding alarm holding structure 43, until movement arm 321 crosses the free end of alarm holding structure 43, holding structure 43 of alarming
Affranchise state in the presence of elastic force, and props up alarm holding structure 43 from the bottom for holding structure 43 of alarming, and prevents from reporting
The alert resilience of holding structure 43.I.e. after the signalizing activity, no matter pressure or density reduce or increase (corresponds to regulating part 29 respectively
Away from microswitch 32 or close to microswitch 32), alarm holding structure 43 can keep the movement arm 321 of microswitch 32
In signalizing activity state, referring to Fig. 2 and Fig. 3, alarm maintaining body 43 is corresponding with needing the signal contact of signal holding to be set
Put, after the signalizing activity, just can only can reset signal by resetting-mechanism 44.Described maintaining body 43 is by an elasticity
Element forms.
Referring to Fig. 4, resetting-mechanism 44 is connected to the inwall of housing 10 for one, and the both ends of resetting-mechanism 44 can be along shell
The rod member that the inwall of body 10 slides, rod member 44 is moved to close to the side of alarm holding structure 43, and continued to chassis 8
Madial wall direction promotes rod member 44, alarm maintaining body 43 is moved to the direction of the movement arm 321 away from microswitch, treats
When alarm maintaining body 43 separates with movement arm 321, the movement arm 321 of microswitch 32 recovers just in the presence of screen resilience
Normal working condition, resets signal.
Further, resetting-mechanism 44 is rotary motion, spinning reduction mechanism, makes resetting-mechanism promote maintaining body remote
From the movement arm of microswitch, the movement arm of microswitch recovers normal condition, resets signal.The resetting-mechanism is one
Rod member composition with lever, by rotation process handle, the rod member 44 of spinning reduction mechanism, promotes the rod member of resetting-mechanism
Movement arm of the maintaining body away from microswitch, the movement arm of microswitch recover normal condition, reset signal.
In other embodiment provided by the invention, resetting-mechanism 44 can also move horizontally or move vertically, and press
Or resetting-mechanism 44 is extracted, resetting-mechanism 44 is promoted movement arm of the maintaining body away from microswitch, the action of microswitch
Arm recovers normal condition, resets signal.The resetting-mechanism is an element composition with lever, by pressing or extracting
Lever, the element of resetting-mechanism is promoted, the element of resetting-mechanism is promoted movement arm of the maintaining body away from microswitch,
The movement arm of microswitch recovers normal condition, resets signal.Resetting-mechanism is sealing with housing, in operation reset machine
During structure, the sealed air chamber in housing is in sealing state all the time.The resetting-mechanism is realized by sealing ring and housing and sealed
's.
The resetting-mechanism also includes reduction apparatus 45, and after operating resetting-mechanism, reduction apparatus 45 can make resetting-mechanism
Restore to the original state.The reduction apparatus is flexible member 45, after operation resetting-mechanism terminates, the bullet of the flexible member of reduction apparatus
Power can make resetting-mechanism 44 restore to the original state.Or the reduction apparatus contains spring, after operation resetting-mechanism terminates, reduction
The elastic force or pulling force of the spring of device can make resetting-mechanism restore to the original state.
The indicating value indication mechanism includes：Show Baden pipe 25, displays temperature compensating element, (bimetal leaf), display end
Seat 20, movement 23, dial 19, pointer 22 and display base 16；One end of the display Baden pipe 25 and the displays temperature
One end of compensating element, is both secured to the display end seat 20, and the other end of the display Baden pipe 25 is connected to the display
On pedestal 16, the other end of the displays temperature compensating element, passes sequentially through display linking arm and display connecting rod and the movement
The other end of 23 connections or the displays temperature compensating element, is directly connected with the movement 23, and the pointer 22 is installed on
On the movement 23 and before the dial 19, sulfur hexafluoride density indicating value display function is realized.Wherein, base is shown
Seat 16 is connected with sulfur hexafluoride electrical equipment, makes display Baden pipe 25 based on the sulfur hexafluoride in sulfur hexafluoride electrical equipment
The pressure of gas and mechanical deformation occurs, pass through the mechanical deformation drive movement work.The high antivibration gas of the embodiment of the present invention one
Volume density relay substitutes critical component of the bellows of the prior art as indicating value indication mechanism using display Baden pipe,
Can easily realize gamut scope (- 0.1~full scale) show, particularly be very easy to realization be initiated with-
0.1MPa display, can shows vacuum when vacuumizing, and is very easy to popularization and application.And its signaling gear (signal simultaneously
Control section) used by load cell be bellows 9 plus spring 39, to ensure the high resistance to shock of density monitor, and adopt
Contact is microswitch 32, to ensure the reliable electric property of density monitor.The displays temperature compensating element, can
With the compensating device formed using bimetal leaf or use the compensating device filled with compensation gas.Bellows 9 is mainly as gas
Body pressure transmission device, realize that spring 39 is used as pressure and mainly measures member by using the combination of bellows 9 and spring 39
Part, further improve measuring accuracy.If SF6 electrical equipments do not have gas leakage, high antivibration gas density relay does not just send report
Alert block signal；If SF6 electrical equipment gas leakage, when the SF6 gas density is in SF6 electrical equipments is near or below sealing
During the density of the compensation gas in cavity, high antivibration gas density relay is issued by warning block signal, it is ensured that power network is pacified
Entirely.
The signaling gear specifically includes：Seal cavity, bellows 9, several microswitch 32, signal regulation mechanisms
28 and outlet connecting seat 5.The bellows 9 is in the seal cavity；The signal regulation mechanism 28 is opened with the fine motion
Close 32 to be correspondingly arranged, the signal wire of the microswitch 32 is connected to the outlet connecting seat 40.The first of the bellows 9
End connects the signal regulation mechanism 28.
Wherein, the first end sealing of the bellows 9, the second end and the sulfur hexafluoride electrical equipment phase of the bellows 9
Connect and the annular seal space is filled with compensation gas.The signal regulation mechanism 28 is also provided with regulating part 29, regulating part
29 adjusting the alarm of density monitor, locking contact working value.It is close between the outlet connecting seat 40 and the seal cavity
Envelope is set.The operation principle of the high antivibration gas density relay of the embodiment of the present invention one is：It is close after regulating regulating part 29
Seal cavity is sealed, is typically realized by welding, then to seal cavity vacuumize process, then according to high antivibration gas density
The parameter of relay is filled with the compensation gas of relevant pressure in seal cavity.SF6 if (sulfur hexafluoride) electrical equipment does not have
Gas leakage, high antivibration gas density relay just do not send warning block signal；If SF6 electrical equipment gas leakage, when SF6 electricity
When SF6 gas densities in gas equipment are near or below the density of the compensation gas in seal cavity 2, high antivibration gas density
Relay is issued by warning block signal, it is ensured that power grid security.
The outlet connecting seat 40 can install transition piece by junction block and be fixedly installed in the seal cavity, or
Person, the outlet connecting seat can also be directly fixedly installed in the seal cavity.The signal wire of the microswitch 32 is also
It can be connected with signal teletransmission circuit, to realize the on-line monitoring of sulfur hexafluoride density.Seal cavity can be by metal material system
Into (such as being welded), outlet connecting seat is made up of metal, glass and some lead-out wires.
In addition it is also possible to be set to the first end of the bellows 9 and the second end all seal, the seal cavity and hexafluoro
Change sulphur electrical equipment to be connected and in the bellows 9 filled with compensation gas.The microswitch 32 and the Signal Regulation machine
Structure 28 can be located in the seal cavity, or, the microswitch 32 and the signal regulation mechanism can also be located at institute
State outside seal cavity.
Fig. 5 is the partial cutaway schematic of the high antivibration gas density relay of the embodiment of the present invention two, as shown in Fig. 2,
Compared with embodiment one, the main distinction is the high antivibration gas density relay of the embodiment of the present invention two：Joint 2 is fixed on bottom
At the eccentric position of disk 8, the sealing of display base 16 is fixed on transition piece 11, and the sealing of transition piece 11 is fixed on chassis 8, bottom
Disk 8 is provided with blow vent 41, and joint 2 is sealed in corresponding to blow vent 41 on chassis 8.Display base 16, transition piece 11, ripple
Pipe 9 and joint 2 are mutually ventilated so that density monitor communicates with electrical equipment in gas circuit.
The high antivibration gas density relay of the present invention, filled with compensation gas in sealed air chamber, or, filled in bellows
There is compensation gas.Or displays temperature compensating element, includes：Bimetal leaf form compensating device or filled with compensation gas
Compensating device.
Compensating device filled with compensation gas compensates Baden pipe for the display filled with compensation gas, or filled with compensation gas
Compensating device for filled with compensation gas display compensate bellows.
Displays temperature compensating element, is that bimetal leaf encrypts the gas sealed, or sealing gas.
Housing is hermetically sealed so that density monitor is absolute pressure type density monitor, and its indicating value is shown as absolute pressure, letter
Number and absolute pressure, do not influenceed by height above sea level.
The position of the microswitch can be arranged on the outside of bellows, i.e., microswitch can be disposed below, and be avaled
Go, make the thickness of density monitor thinning.
In addition, technical scheme can have up to 4 kinds of permutation and combination, as being filled with compensation gas, bottom in bellows
Disk is between bellows and joint or side；Air chamber compensation gas, chassis is between bellows and joint or side.It is aobvious
Show compensation：Bimetal leaf, or Baden pipe, or bellows；Display：Absolute pressure or relative pressure.
Temperature compensating element can be that display Baden pipe and/or display bellows, display Baden pipe connect with sealed air chamber
It is logical, it is internal filled with compensation gas, play a part of adjusting gas temperature in electrical equipment.Temperature compensating element can also be double
Sheet metal, do not connected with sealed air chamber, play a part of adjusting gas temperature in electrical equipment.
Wherein, compensation gas can be that sulfur hexafluoride gas, sulfur hexafluoride gas mixture, nitrogen, compressed air etc. are various
Gas.
Display base is fixed on chassis, or the display base is fixed on bottom plate.
High antivibration gas density relay includes air inlet, and air inlet is arranged on chassis or housing, and the joint passes through gas
Pipe is connected with air inlet or is directly connected with air inlet.Or high antivibration gas density relay, in addition to air inlet, enter
Gas port is arranged on chassis, and the joint is connected with air inlet, filled with compensation gas in sealed air chamber.Display base passes through company
Take over or be directly anchored on chassis, the display base is connected with joint in gas circuit.
The housing of high antivibration gas density relay can be with separation type, and housing 1 is stainless steel, the aluminium of housing 2, the He of housing 1
Housing 2 is sealed using sealing ring.Watch crystal is sealed with housing 2 using sealing ring.In addition in the outer surface of housing 2 and watch crystal
Stainless steel watch case is covered with, it is more attractive in appearance.
The gas density relay provided by the invention for being provided with alarm holding structure, maximum feature is created in structure
Newly：Display base sealing is fixed on transition piece, and transition piece sealing is fixed on chassis, and chassis is provided with blow vent, and joint is straight
Connect or be fixed on by connecting tube on chassis.Display base, transition piece, bellows and joint are mutually ventilated so that density relay
Device communicates with electrical equipment in gas circuit.For one end sealing welding of housing on chassis, the other end and watch crystal of housing are mutual
Connection, form sealed air chamber.The signaling gear and indicating value indication mechanism are all sealed in sealed air chamber, in sealed air chamber
Filled with compensation gas, the compensation gas rises to signaling gear and indicating value indication mechanism respectively temperature compensation function.The watchcase
Front is transparent watch crystal.So the load cell of indicating value indication mechanism (display portion) uses Baden pipe, is different from
The load cell of display portion uses bellows in the prior art, overcomes that bellows displacement is small, is difficult to gamut shows
It problem, can easily realize that the gamut scope of gas density relay is shown, particularly be very easy to realize
Begin as -0.1MPa display, can display vacuum when vacuumizing, very easy popularization and application.And its signaling gear simultaneously
Load cell is bellows used by (signal control portion), to ensure the high resistance to shock of density monitor, and use
Contact is microswitch, to ensure the reliable electric property of density monitor.The gas for being provided with alarm holding structure of the present invention
Volume density relay, signaling gear use bellows, ensure that anti-seismic performance is good.Other indication mechanism can also include bimetallic
Piece, the compensation gas in bimetal leaf and sealed air chamber play temperature compensation function to indicating value indication mechanism, further carried jointly
It is high and ensure that precision.Its maximum feature also has maintaining body and resetting-mechanism after signalizing activity simultaneously, it is possible to achieve electricity
Gas equipment arcing overpressure alarm keeps a kind of gas density relay for being provided with alarm holding structure of function.Work as electrical equipment
, being capable of overpressure alarm during its hypertonia during arcing.And after electrical equipment arcing terminates, when its pressure is normal, it is alarmed
Signal is always maintained at, can allow operations staff find electrical equipment arcing phenomenon, the electrical equipment of timely processing arcing phenomenon,
Ensure electric power safety operation.Gas density relay with gas pressure (or gas density) maintaining body and resetting-mechanism,
It can be very good to ensure power grid security, it will be used widely.
In addition, the watchcase and housing are integrated.
In a word, the of the invention gas density relay for being provided with alarm holding structure have oil-free, resistance to shock it is again good,
The advantages of precision height, good electric property, long working life, gamut indication range, in addition it is important also having structure letter
Singly, the advantages of good manufacturability.Simultaneously because the microswitch can be located in the seal cavity, and have in seal cavity
Sulfur hexafluoride gas, because sulfur hexafluoride gas has very strong insulation and arc extinguishing ability, so the technology of the present invention density monitor
Electric terminal there is extraordinary electric property, using reliable, contacts are reliable, long lifespan, this be also the present invention very
Big innovative point and feature.Indicating value indication mechanism is all sealed in sealed air chamber simultaneously so that density monitor is that absolute pressure type is close
Relay is spent, its indicating value is shown as absolute pressure, and signal is also absolute pressure, is not influenceed by height above sea level.
Finally it should be noted that：Various embodiments above is merely illustrative of the technical solution of the present invention, rather than its limitations；
Although the present invention is described in detail with reference to foregoing embodiments, it will be understood by those within the art that：Its
The technical scheme described in foregoing embodiments can still be modified, it is either special to which part or whole technologies
Sign carries out equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from various embodiments of the present invention
The scope of technical scheme.
Claims (10)
1. a kind of gas density relay for being provided with alarm holding structure, it is characterised in that shown including signaling gear and indicating value
Mechanism；
The signaling gear includes load cell bellows, the microswitch being opened or closed by bellows control, keeps
The alarm holding structure of the microswitch alarm condition；
The indicating value indication mechanism includes：Display end seat, the display Baden pipe that one end is connected with the display end seat, show Baden
The pipe other end is connected on display base, and display base is arranged on chassis, by the display of indicating value indication mechanism by transition piece
The movement and the pointer on movement of Baden pipe driving, and dial；
Wherein, the display Baden pipe is connected by the display base, transition piece with the bellows；The bellows passes through
Joint connects with electrical equipment.
2. gas density relay according to claim 1, it is characterised in that the signaling gear is also included described in recovery
The resetting-mechanism of microswitch normal operating conditions, promotes and/or presses the resetting-mechanism, and resetting-mechanism promotes the alarm
Movement arm of the holding structure away from the microswitch, microswitch recover normal operating conditions, and signal resets.
3. gas density relay according to claim 1, it is characterised in that the signaling gear also includes fixed mount,
The fixed mount is fixed on the chassis, and microswitch is located on the fixed mount；
Or the signaling gear also includes support, the sealed end of the bellows is sealedly connected on the one side of the support.
4. gas density relay according to claim 1, it is characterised in that the signaling gear also includes push rod, institute
The outside that push rod is located at the bellows is stated, is extended along the telescopic direction of the bellows, the first end of the push rod is fixed on
On support, the second end is provided with regulating part fixed plate, and the free end of the regulating part fixed plate, which is provided with, triggers the microswitch
Regulating part.
5. gas density relay according to claim 2, it is characterised in that gas density relay also includes blanket gas
Room, signaling gear and indicating value indication mechanism are located inside the sealed air chamber, filled with compensation gas in the sealed air chamber；It is described
Resetting-mechanism includes one the rod member with lever, and the rod member is movable to be connected on the madial wall of the sealed air chamber.
6. gas density relay according to claim 5, it is characterised in that the gas density relay also includes temperature
Compensating element, is spent, the temperature compensating element is compensation Baden pipe or compensation bellows, is connected with the display end seat；
Or the temperature compensating element is bimetal leaf, is connected with the display end seat.
7. gas density relay according to claim 1, it is characterised in that the gas density relay also included
Part is crossed, described transition piece one end is fixedly mounted on chassis, and the other end connects with display base, and passes through the blow vent on chassis
Connected with bellows.
8. gas density relay according to claim 7, it is characterised in that cover plate is additionally provided with the chassis, it is described
Cover plate covers the transition piece and/or the blow vent, to seal the gas density relay.
9. gas density relay according to claim 4, it is characterised in that the signaling gear also includes spring, institute
The one end for stating spring is fixed on side of the support provided with push rod, and the other end is adjustable on the outside of the push rod.
10. gas density relay according to claim 5, it is characterised in that the gas density relay also includes
Watchcase and housing, one end of the housing are fixedly connected on the chassis, and the other end is tightly connected with the watchcase, the table
Shell, housing and chassis surround the sealed air chamber.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711224018.XA CN107863272B (en) | 2017-11-29 | 2017-11-29 | Gas density relay with warning retaining structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711224018.XA CN107863272B (en) | 2017-11-29 | 2017-11-29 | Gas density relay with warning retaining structure |
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| CN107863272A true CN107863272A (en) | 2018-03-30 |
| CN107863272B CN107863272B (en) | 2021-04-30 |
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| CN108550499A (en) * | 2018-04-27 | 2018-09-18 | 朗松珂利(上海)仪器仪表有限公司 | Sulfur hexafluoride gas density relay and its assembly technology |
| CN109243914A (en) * | 2018-09-28 | 2019-01-18 | 上海乐研电气有限公司 | A kind of method and high-precision gas density monitor improving gas density relay precision |
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|---|---|
| CN107863272B (en) | 2021-04-30 |
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