CN109103050A - A method of improving gas density relay precision - Google Patents
A method of improving gas density relay precision Download PDFInfo
- Publication number
- CN109103050A CN109103050A CN201811136606.2A CN201811136606A CN109103050A CN 109103050 A CN109103050 A CN 109103050A CN 201811136606 A CN201811136606 A CN 201811136606A CN 109103050 A CN109103050 A CN 109103050A
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- China
- Prior art keywords
- microswitch
- gas density
- signal
- trigger element
- contact trigger
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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
- 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
- H01H35/36—Switches operated by change of fluid pressure, by fluid pressure waves, or by change of fluid flow actuated by curled flexible tube, e.g. Bourdon tube
Abstract
A method of gas density relay precision being improved, gas density relay includes shell, pedestal, end seat, Baden pipe, temperature compensating element, signal regulation mechanism and several microswitches as signal generator；Microswitch is button-type microswitch, the density monitor further includes the microswitch contact trigger element being fabricated by elastic material, microswitch contact trigger element one end is immobilized in the shell, the button of the other end and button-type microswitch is correspondingly arranged, and is resisted against on the button of each microswitch；When gas density value changes, Baden pipe and temperature compensating element generate displacement, the displacement passes sequentially through the signal trigger mechanism and drives the microswitch contact trigger element, and position change occurs for microswitch contact trigger element, and the microswitch is made to issue corresponding signal.Density monitor of the invention has the advantages that precision is high, contact conduction property is good, can apply well in SF6On electrical equipment.
Description
Technical field
The present invention relates to a kind of gas density relay more particularly to a kind of sides for improving gas density relay precision
Method.
Background technique
SF6And its mixed gas or other environment-friendly type outlet openings products have been widely used in power department, industrial and mineral enterprise
Industry promotes the fast development of power industry.And SF6The arc-extinguishing medium and dielectric of electric product is SF6Gas, Bu Nengfa
Raw gas leakage.If gas leakage occurs, it cannot guarantee SF6The reliable and secure operation of electric product.So monitoring SF6The SF of electric product6It is close
Angle value is very necessary.
A kind of pointer SF of machinery is generallyd use at present6Gas density relay monitors SF6Density works as SF6Electrically
The relay can be alarmed and is latched when gas leakage occurs for product, while can also displaying scene density value.The density monitor its connect
Point generally uses hairspring-type magnetic-type electrical contact, although increasing magnetic auxiliary suction.But this magnetic-type electrical contact density after
Electric appliance generally uses balance spring type electric contact, because movable contact is dynamic with pointer when density is higher than setting value, so
The power of balance spring cannot be big, and otherwise show value is just not allowed.In addition magnetic auxiliary suction can not be adjusted too big, otherwise density monitor
Return value will be very big, be more than technical standard.Therefore for magnetic-type electrical contact, since itself contact closure power is small,
Time is slightly long, if contact aoxidizes, contact will obstructed or contact it is unreliable.For no oil type, magnetic-type electrical contact contact is sudden and violent
In air, be very easy to oxidation or product has dust to dew, and contact is easy poor contact or obstructed.Special emphasis is, on edge
Haiti area, containing salt fog, is more easier that contact is caused to be easy poor contact or obstructed since there was dampness in the air.For oil-filled type,
Although magnetic-type electrical contact contact is immersed in silicone oil, but for a long time, and after movement for several times, contact performance can decline, in addition oil
Film has insulating effect, and contact also can poor contact or obstructed.Experiments have shown that there especially can have contact in low temperature to be unreliable existing
As.In addition, there is oil leak defect in density monitor, and for the density monitor of light leakage oil, magnetic-type electrical contact contact is just
Exposure in air, is very easy to oxidation or even product has dust, contact is easy poor contact or obstructed.
And existing market also develops the SF that a kind of contact uses microswitch6Gas density relay, the SF6Gas is close
Spending microswitch used by relay is band swing rod (or microswitch be equipped with motion arm), structure as shown in Figure 1, by
It is equipped with axis 903 in swing rod 902, axis 903 is arranged on microswitch 9.In order to set swing rod 902 can with flexible rotating, axis 903
Set on microswitch 9 just have gap, while swing rod 902 can also wave.Since the displacement of Baden pipe is also small, there is gap,
And generate and wave, it is not very stable for allowing for the precision of this density monitor in this way.Because swing rod has gap and waves
The reason of, so that the position of swing rod changes, the precision of this microswitch type density monitor will be caused to deviate,
It is not very stable, it is difficult to realize the high-precision of density monitor.Above-mentioned SF6Though microswitch used by gas density relay
So have the advantages that certain but unreasonable due to the structure of its microswitch, there are still following problems in use:
1) when vibrating, swing rod has gap, and position varies slightly, and will seriously affect the precision of density monitor.2)
Simultaneously in debugging, it is also difficult to the very quasi- of precision tune, that is, be difficult to make high-precision density monitor.
In summary, it is necessary to form a kind of method for improving gas density relay precision by studying, and then develop
A kind of high-precision, high electrical property gas density relay, to guarantee SF6Equal outlet openings equipment reliably working.
Summary of the invention
In order to solve the above problems existing in the present technology, the purpose of the present invention is to provide a kind of raising gas density after
The method of electric appliance precision succeeds in developing the good high-precision gas density monitor of electric property, for controlling and monitoring sealing
SF in container6The density of equal gases, and it is directed to SF6The gas leakage situation occurred in the electrical equipment of equal gases, issues report in time
Alert signal and block signal, to ensure that electric power safety plays a role.
A method of gas density relay precision being improved, gas density relay includes: gas density relay shell
Body, setting in the intracorporal pedestal of shell, end seat, Baden pipe, temperature compensating element, signal regulation mechanism and several are used as signal
The microswitch of device；One end of the Baden pipe is sealedly connected on the pedestal, and the other end of the Baden pipe is tightly connected
On sitting up straight, one end of the temperature compensating element, which is connected to, is sat up straight, the other end and signal tune of the temperature compensating element
Section mechanism is connected；The method includes the microswitches to use button-type microswitch；Using elastic material manufacture
At microswitch contact trigger element, microswitch contact trigger element one end is immobilized in the shell, and the other end is pressed with described
The button of button type microswitch is correspondingly arranged, and is resisted against on the button of each microswitch correspondingly；Work as gas density
When value changes, the Baden pipe and temperature compensating element generate displacement, which passes sequentially through the signal trigger mechanism
The microswitch contact trigger element is driven, when gas density value reaches corresponding setting value, the microswitch contact touching
Element pressing or the button far from the microswitch are sent out, the microswitch is made to generate corresponding signal, completes gas density
The function of relay；
After gas density value restores normal, the Baden pipe and temperature compensating element generate corresponding displacement, the displacement according to
Secondary to drive the microswitch contact trigger element by the signal trigger mechanism, the microswitch contact trigger element is multiple
State of the position to gas density when normal.
When the decline of the gas density of electrical equipment, the Baden pipe and temperature compensating element of gas density relay generate position
It moves, signal trigger mechanism also and then generates displacement, and microswitch contact trigger element also and then generates displacement at this time, arrives certain journey
When spending, the microswitch is made to issue corresponding signal.
The microswitch contact trigger element being fabricated due to using elastic material, microswitch contact triggering member
Elastic force of the part by microswitch contact trigger element itself or the thrust by signal trigger mechanism send out the microswitch
Corresponding alarm or block signal out, and the microswitch contact trigger element that elastic material is fabricated and microswitch are pair
It should be fixed together, it is very close to each other, it will not wave, in vibration or transport, will not influence the precision of density monitor, make
The precision for obtaining density monitor is very stable, simultaneously because signal generator of the microswitch as density monitor is used, it can
To guarantee that contact is reliably connected, guarantee system reliably working.
Further include display machine core, dial and pointer, one end of the temperature compensating element by display connecting rod with it is described
One end of the connection of display machine core or the temperature compensating element is directly connect with display machine core, and the pointer is installed on described aobvious
Show on machine core and is set to before the dial.
A method of gas density relay precision is improved, is shown including relatively independent signal control portion and indicating value
Part；The signal control portion includes control pedestal, control end seat, control Baden pipe, control temperature compensating element, signal tune
Save mechanism and several microswitches as signal generator；One end of the control Baden pipe is sealedly connected on the control base
On seat, the other end of the control Baden pipe is sealedly connected in control end seat, and one end of the control temperature compensating element connects
It connects in control end seat, the other end of the control temperature compensating element is connected with signal regulation mechanism；The indicating value is shown
Part includes showing Baden pipe, displays temperature compensating element, display base, display end seat, display machine core, dial and pointer,
One end of the display Baden pipe is sealedly connected on the display base, and the other end of the display Baden pipe is sealedly connected on
Display end is taken, and one end of the displays temperature compensating element, is connected to the display end and takes, the displays temperature compensation member
The other end of part connect with the display machine core by showing connecting rod or the other end of the temperature compensating element directly and institute
Display machine core connection is stated, the pointer is installed on the display machine core and is set to before the dial；
It is characterized in that, the method includes the microswitches to use button-type microswitch；
The microswitch contact trigger element being fabricated using elastic material, microswitch contact trigger element one end
It is immobilized in the shell, the button of the other end and the button-type microswitch is correspondingly arranged, and is resisted against correspondingly each
On the button of microswitch；
When gas density value changes, the Baden pipe and temperature compensating element generate displacement, which successively leads to
It crosses the signal trigger mechanism and drives the microswitch contact trigger element, when gas density value reaches corresponding setting value,
The microswitch contact trigger element pressing or the button far from the microswitch, generate the microswitch corresponding
Signal completes the function of gas density relay；
After gas density value restores normal, the Baden pipe and temperature compensating element generate corresponding displacement, the displacement according to
Secondary to drive the microswitch contact trigger element by the signal trigger mechanism, the microswitch contact trigger element is multiple
State of the position to gas density when normal.
It further include locating part, locating part limitation signal regulation mechanism moves in a certain range, the touching of microswitch contact
Hair element moves in its elastic range always；The signal regulation mechanism, which is equipped with, adjusts screw；It further include cushioning balance mechanism,
The antivibration that the cushioning balance mechanism improves density monitor is horizontal.
The shape of the microswitch contact trigger element is straight or bending shape；The microswitch contact triggering
The relative position of element and microswitch can be horizontal or with gradient.
The effective width of the microswitch contact trigger element front end and signal regulation mechanism contact site is 4-
18mm。
It further include position-limit mechanism, when density monitor is vibrated, which ensures signal regulation mechanism just
Movement in normal working range, and the position-limit mechanism signal regulation mechanism is limited in a setting and be greater than density and alarm
The corresponding position of value.
It further include auxiliary member, auxiliary member is fixed on the middle front end of microswitch contact trigger element, is can be improved altogether by elasticity
The local stiffness for the microswitch contact trigger element that material is fabricated.
The microswitch contact trigger element part width being fabricated by elastic material be reduce, or part be have it is scarce
Mouthful, or part is porose.
The temperature compensating element is bimetal leaf or the Baden pipe filled with gas.
The signal control part is arranged with anti-error operation mechanism.
The gas density relay further includes pressure sensor, temperature sensor, signal processing unit, and signal transmission is single
Member has remote transfer signal, realizes density on-line monitoring.
When gas density value changes, the Baden pipe and temperature compensating element generate displacement, which successively leads to
It crosses the signal trigger mechanism and drives the microswitch contact trigger element, when gas density value reaches corresponding setting value,
The microswitch contact trigger element just presses or the button far from the microswitch, generates the microswitch corresponding
Signal, complete the function of gas density relay；
After gas density value restores normal, the Baden pipe and temperature compensating element generate corresponding displacement, the displacement according to
Secondary to drive the microswitch contact trigger element by the signal trigger mechanism, the microswitch contact trigger element is multiple
State of the position to gas density when normal.
When signal trigger mechanism generates displacement, microswitch contact trigger element is triggered by microswitch contact at this time
The elastic force of element itself also and then generates displacement by the thrust of signal trigger mechanism, when arriving setting value, opens the fine motion
It closes and issues corresponding alarm or block signal, when gas density value is normal, the microswitch contact trigger element is reset to
Shape when gas density is normal.
High-precision gas density monitor of the present invention due to use the above technical method, make it compared with prior art,
Have the characteristics that following clear advantage and:
1, this method is due to using signal generator of the microswitch as density monitor, it is ensured that contact is reliable
Conducting guarantees system reliably working.
2, the microswitch contact trigger element that this method is fabricated due to using elastic material, the microswitch connect
Elastic force of the point trigger element by microswitch contact trigger element itself or the thrust by signal trigger mechanism, make described micro-
Dynamic switch issues corresponding alarm or block signal.And microswitch contact trigger element that elastic material is fabricated and fine motion
Switch correspondence is fixed together, very close to each other, will not wave, and then precision would not be caused to be deteriorated, and is vibrating or is transporting
When defeated, the precision of density monitor would not be influenced, so that the precision of density monitor is very stable.Simultaneously in debugging, also very
It is easy the very quasi- of precision tune, it is easy to make high-precision density monitor.
Detailed description of the invention
In the following, in conjunction with attached drawing, the invention will be further described:
Fig. 1 is the structural schematic diagram of the microswitch of prior art pointer-type gas density relay；
Fig. 2 is the structural schematic diagram of the high-precision gas density monitor of the embodiment of the present invention one；
Fig. 3 is the diagrammatic cross-section of the high-precision gas density monitor of the embodiment of the present invention one；
Fig. 4 is the microswitch signal structure explanatory diagram of the high-precision gas density monitor of the embodiment of the present invention one；
Fig. 5 is the diagrammatic cross-section of the high-precision gas density monitor of the embodiment of the present invention two；
Fig. 6 is the microswitch signal structure explanatory diagram of the high-precision gas density monitor of the embodiment of the present invention two；
Fig. 7 is the microswitch signal structure explanatory diagram of the high-precision gas density monitor of the embodiment of the present invention three；
Fig. 8 is the microswitch signal structure explanatory diagram of the high-precision gas density monitor of the embodiment of the present invention four；
Fig. 9 is the microswitch signal structure explanatory diagram of the high-precision gas density monitor of the embodiment of the present invention five；
Figure 10 is the diagrammatic cross-section of the high-precision gas density monitor of the embodiment of the present invention six；
Figure 11 is a kind of implementation example figure of microswitch contact trigger element of high-precision gas density monitor of the invention；
Figure 12 is the microswitch contact trigger element another kind embodiment of high-precision gas density monitor of the invention
Figure；
Figure 13 is the microswitch signal structure explanatory diagram of the high-precision gas density monitor of the embodiment of the present invention seven.
Specific embodiment
To keep purpose, method, technical solution and the advantage of the embodiment of the present invention clearer, below in conjunction with of the invention real
The attached drawing in example is applied, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without creative efforts, shall fall within the protection scope of the present invention.
The present invention by a kind of method for improving gas density relay precision, provide a kind of high-precision gas density after
It is illustrated and illustrates for electric appliance.Referring specifically to Fig. 2, Fig. 3 and Fig. 4, Fig. 2 and Fig. 3 are the lithium of the embodiment of the present invention one
The partial cutaway schematic of sulphur gas density relay, as shown in Fig. 2, Fig. 3 and Fig. 4, the embodiment of the present invention one discloses one kind
High-precision gas density monitor, with SF6For gas density relay.High-precision SF of the present invention6Gas density relay is main
By connector 1, display machine core 2, watchcase 3, dial 4, pointer 5, Baden pipe 6, temperature-compensating plate 7 (width 5.5-18mm), wiring
Seat 8, several (present case is for three) microswitches 91,92,93, printed circuit board 10, fixed plate 11, Signal Regulation machine
Structure 12, several adjust screw 131,132,133, pull rod 14, watch crystal 15, cover circle 16, position-limit mechanism 17, end seat 18, pedestal
19, microswitch contact trigger element 201,202,203, it is locating part 21, microswitch contact trigger element fixing piece 22, anti-
Malfunction the compositions such as mechanism 23.Wherein, connector 1 is fixed on watchcase 3, and display machine core 2 is fixed on pedestal 19.Baden pipe 6
One end is welded on pedestal 19 and in communication, and the other end is welded in end seat 18.And the one of end seat 18 and temperature-compensating plate 7
End is connected, and the other end of temperature-compensating plate 7 is connected with signal regulation mechanism 12.Three are fixed in signal regulation mechanism 12
A adjusting screw 131,132,133.Signal regulation mechanism 12 is connected with connecting rod 15 again, and connecting rod 15 is connected with display machine core 2 again
It connects.Three microswitches 91,92,93 are separately fixed on printed circuit board 10, and printed circuit board 10 is fixed on fixed plate 11
On, fixed plate 11 is in turn mounted on pedestal 19.Microswitch 91,92,93 is all button-type microswitch, is respectively provided with button
9101,9201,9301.Microswitch contact trigger element 201,202,203 is fabricated by high performance elastic material, is had
Elasticity well, will not occur elastic failure problem in certain field of load, can be by the high performance such as 65Mn steel, beryllium-bronze
Elastic material be fabricated, can also be fabricated by the nonmetallic materials with plastic material.The triggering of microswitch contact
Element 201,202,203 is immobilized in the shell by microswitch contact trigger element fixing piece 22, the triggering of microswitch contact
Element 201,202,203 is correspondingly arranged with microswitch 91,92,93 respectively, i.e., microswitch contact trigger element 201,202,
203 are correspondingly arranged with the button 9101,9201,9301 of microswitch 91,92,93 respectively, and microswitch contact triggering member
Part 201,202,203 is correspondingly arranged at each top for adjusting screw 131,132,133, as shown in Figure 4, wherein microswitch connects
Point trigger element 201 is fixed on the top for adjusting screw 131, and microswitch contact trigger element 202, which is fixed on, adjusts screw 132
Top, microswitch contact trigger element 203 be fixed on adjust screw 133 top.Locating part 21 is immobilized in the shell, limit
Position part 21 is correspondingly arranged with microswitch contact trigger element 201,202,203.Pointer 5 and dial 4 are separately fixed at display
On machine core 2.The signal contact of microswitch is connected on junction block 8 by electric wire from printed circuit board 10, and junction block 8 is fixed
On watchcase 3.Watch crystal 15, cover circle 16 are separately fixed on watchcase 3, its internal mechanism can be protected from mechanical damage and dirt
Object, rainwater intrusion.Position-limit mechanism 17 is immobilized in the shell, and there are gaps between signal regulation mechanism 12.Position-limit mechanism 17
Effect is, when switching divide-shut brake generation vibration, to prevent signal regulation mechanism 12 from axially generating excessive displacement along it, prevent from adjusting
Section screw 131,132,133 guarantees system there is a phenomenon where blocking or being detached from microswitch contact trigger element 201,202,203
System reliably working.In the present embodiment, the shape of microswitch contact trigger element 201,202,203 is straight；Microswitch connects
The relative position of point trigger element 201,202,203 and microswitch 91,92,93 is horizontal；Temperature compensating element 7 is double gold
Belong to sheet material to be made, or is the compensation Baden pipe filled with gas.
In addition, relay is also provided with anti-error operation mechanism 23, and when density monitor is vibrated, the false action-proof machine
Structure 23 can limit the amplitude of Baden pipe 6, signal regulation mechanism 12, thus be greatly improved the resistance to shock of relay, guarantee
System reliably working.
The action principle of high-precision gas density monitor of the present invention is to be mended based on elastic element Baden pipe 6 using temperature
The pressure and temperature for repaying 7 pairs of piece variations is modified, the variation of reaction gas density.I.e. in measured medium (such as SF6) gas
Pressure effect under, because of the effect of temperature-compensating plate 7, the variation of density value, pressure value also changes accordingly, forces
The end of Baden pipe 6 generates corresponding flexible deformation-displacement and passes to display machine by means of temperature-compensating plate 7 and connecting rod 15
Core 2, display machine core 2 pass to pointer 5 again, then indicate tested gas density value on dial 4.If gas leakage
, density value, which declines, (reaches alarm or locking value) to a certain extent, and Baden pipe 6 generates accordingly to bottom offset, passes through temperature
Compensating plate 7 is spent, makes signal regulation mechanism 12 to bottom offset, the adjusting screw 131,132,133 in signal regulation mechanism 12 is just gradually
From corresponding microswitch contact trigger element 201,202,203, microswitch contact trigger element 201,202,203 just gradually from
The button 9101,9201,9301 of corresponding microswitch 91,92,93, to a certain extent when, corresponding microswitch 91,92,
93 contacts are switched on, and are issued corresponding signal (alarm or locking), are reached monitoring and control the gas in the equipment such as electric switch
Density makes electrical equipment trouble free service.If its density value increases, pressure value also increases accordingly, increases to a certain extent,
Baden pipe 6 is also generated and is shifted up accordingly, by temperature-compensating plate 7, shifts up signal regulation mechanism 12, Signal Regulation
Adjusting screw 131,132,133 in mechanism 12 just shifts up, just push corresponding microswitch contact trigger element 201,
202, it 203 shifts up, so that the contact of microswitch 91,92,93 be made just to disconnect, signal (alarm or locking) is just released.
It the microswitch and adjusts screw and is not limited to three, can also be one, two, four or multiple.
Fig. 5 is the partial cutaway schematic of the sulfur hexafluoride gas density relay of the embodiment of the present invention two, such as Fig. 5 and figure
Shown in 6, microswitch contact trigger element 201,202,203 is correspondingly arranged at each lower section for adjusting screw 131,132,133, i.e.,
Microswitch contact trigger element 201 is fixed on the lower section for adjusting screw 131, and microswitch contact trigger element 202 is fixed on
The lower section of screw 132 is adjusted, microswitch contact trigger element 203 is fixed on the lower section for adjusting screw 133.Locating part 21 is fixed
In shell, locating part 21 is correspondingly arranged with microswitch contact trigger element 201,202,203.If electrical equipment gas leakage
, density value, which declines, (reaches alarm or locking value) to a certain extent, and Baden pipe 6 generates accordingly to bottom offset, passes through temperature
Compensating plate 7 is spent, makes signal regulation mechanism 12 to bottom offset, the adjusting screw 131,132,133 in signal regulation mechanism 12 just leans on
Nearly corresponding microswitch contact trigger element 201,202,203, microswitch contact trigger element 201,202,203 just connects
The button 9101,9201,9301 of nearly corresponding microswitch 91,92,93, to a certain extent when, microswitch contact triggering member
Part 201,202,203 just respectively drives corresponding 91,92,93 contact of microswitch, issue corresponding signal (alarm or
Locking), reach monitoring and control the gas density in the equipment such as electric switch, makes electrical equipment trouble free service.If its density
Value increases, and pressure value also increases accordingly, increases to a certain extent, Baden pipe 6 is also generated and shifted up accordingly, is passed through
Temperature-compensating plate 7 shifts up signal regulation mechanism 12, and the adjusting screw 131,132,133 in signal regulation mechanism 12 is just
It shifts up, elastic force of the corresponding microswitch contact trigger element 201,202,203 in own resilient and microswitch push-button
It is just shifted up under effect, so that the contact of microswitch 91,92,93 be made just to disconnect, signal (alarm or locking) is just released.
Equally, the adjusting screw 131,132,133 that locating part 21 limits signal regulation mechanism 12 moves in a certain range, protects micro-
Dynamic make and break contact trigger element 201,202,203 moves in its elastic range always, microswitch contact trigger element 201,
202,203 will not occur elastic failure problem in this certain field of load, it is ensured that high-precision to realize and ensure contact essence
The long-time stability of degree.The adjusting screw of microswitch contact trigger element 201,202,203 front end and signal regulation mechanism 12
131,132,133 effective widths for being in contact position are 4.0-18mm, improve vibration resistance.
Fig. 7 is the microswitch signal structure explanatory diagram of the high-precision gas density monitor of the embodiment of the present invention three, such as
Shown in Fig. 7, the shape of microswitch contact trigger element 201,202,203 is bending, microswitch contact trigger element
201,202,203 is gradient with the relative position band of microswitch 91,92,93.
Fig. 8 is the microswitch signal structure explanatory diagram of the high-precision gas density monitor of the embodiment of the present invention four, such as
Shown in Fig. 8, when electrical equipment gas density is normal, microswitch contact trigger element 201,202,203 is to press against fine motion to open
Close 91,92,93 button 9101,9201,9301.When gas leakage, the adjusting spiral shell of signal trigger mechanism 12 is relied on respectively
The thrust of nail 131,132,133 makes microswitch contact trigger element 201,202,203 generate displacement, is respectively further from fine motion and opens
91,92,93 button 9101,9201,9301 is closed, when arriving setting value, the microswitch is made to issue corresponding alarm or locking
Signal.
Fig. 9 is the microswitch signal structure explanatory diagram of the high-precision gas density monitor of the embodiment of the present invention five, such as
Shown in Fig. 9, when electrical equipment gas density is normal, the thrust of the adjusting screw 131,132,133 of signal trigger mechanism 12 makes
Microswitch contact trigger element 201,202,203 is pressing against the button 9101,9201,9301 of microswitch 91,92,93.Work as gas
When body leaks, signal trigger mechanism and its adjusting screw are generated and are displaced, separate microswitch contact trigger element, and microswitch
Contact trigger element rely on respectively itself elastic force and microswitch push-button itself elastic force so that microswitch contact triggering member
Button 9101,9201,9301 of the part far from microswitch 91,92,93 when arriving setting value, issues the microswitch corresponding
Alarm or block signal.
Figure 10 is the diagrammatic cross-section of the high-precision gas density monitor of the embodiment of the present invention six, one as shown in Figure 10
Kind high-precision gas density monitor, including relatively independent signal control portion and indicating value display portion；Signal control portion
If including control pedestal 19, control end seat 18A, control Baden pipe 6A, control temperature compensating element 7A, signal regulation mechanism 12 and
The dry microswitch 91,92,93 as signal generator；One end of control Baden pipe 6A is connected on control pedestal 19, control
The other end of Baden pipe 6A is connected to one end of control temperature compensating element 7A, controls the other end and letter of temperature compensating element 7A
Number regulating mechanism 12 is connected.Microswitch 91,92,93 be button-type microswitch, the gas density relay further include by
The microswitch contact trigger element 201,202,203 that elastic material is fabricated, microswitch contact trigger element 201,
202,203 one end are immobilized in the shell, and the button of the other end and the button-type microswitch 91,92,93 is correspondingly arranged, and
It is resisted against on the button of each microswitch correspondingly.When gas density value changes, Baden pipe 6A and control are controlled
Temperature compensating element 7A generates displacement, and the adjusting screw 131,132,133 which passes sequentially through signal trigger mechanism 12 is distinguished
Microswitch contact trigger element 201,202,203 is driven, microswitch contact trigger element 201,202,203 occurs position and changes
Become, so that microswitch 91,92,93 is issued corresponding signal respectively, complete the function of gas density relay.The high-precision gas
Density monitor includes cushioning balance mechanism 24, which has supporting role to signal trigger mechanism 12, into one
The antivibration that step improves density monitor is horizontal.In addition the high-precision gas density monitor adjustably installs a position-limit mechanism
25, the position-limit mechanism 25 is being limited in a setting for signal regulation mechanism 12 and be greater than the correspondence of density alarming value with flexible
Position also can be further improved the resistance to shock of density monitor.
Meanwhile the high-precision density monitor of the embodiment, it further include relatively independent indicating value display portion, such as Figure 10 institute
Show, the indicating value display portion include display Baden pipe 6B, displays temperature compensating element, 7B, display base 19, display end seat 18B,
Show machine core 2, dial and pointer 5.One end of display Baden pipe 6B is connected on display base 19, and the other end passes through display end
Seat 18B is connected with one end of displays temperature compensating element, 7B, and the other end of displays temperature compensating element, 7B passes through display connecting rod 14
It is connect with display machine core 2 or the other end of temperature compensating element 7B is directly connect with display machine core 2, pointer 5 is installed on display
It on machine core 2 and is set to before dial, is used to indicate gas density value.Present case control pedestal and display base are combined into one
Body, can also be seperated.
In addition, high-precision gas density monitor of the invention can also include pressure sensor, temperature sensor, signal
Processing unit, signal transmission unit have remote transfer signal, realize density on-line monitoring.
A kind of method of raising gas density relay precision of the invention, as shown in Figure 2, Figure 3, Figure 4, the density relay
Device includes: including gas density relay shell 3, the pedestal being arranged in shell 3 19, end seat 18, Baden pipe 6, temperature-compensating
Element 7, signal regulation mechanism 12 and several microswitches 91,92,93 as signal generator；One end of Baden pipe 6 connects
On pedestal 19, the other end of Baden pipe 6, which is connected to, is sat up straight on 18, and one end of temperature compensating element 7, which is connected to, sits up straight on 18, temperature
The other end of degree compensating element, 7 is connected with signal regulation mechanism 12；Microswitch 91,92,93 is button-type microswitch；
The gas density relay further includes the microswitch contact trigger element 201,202,203 being fabricated by elastic material, micro-
Dynamic 201,202,203 one end of make and break contact trigger element is immobilized in the shell by fixing piece 22, the other end and the button-type
The button 9101,9201,9301 of microswitch is correspondingly arranged, and is resisted against the button of each microswitch correspondingly
9101, on 9201,9301；When gas density value changes, Baden pipe 6 and temperature compensating element 7 generate displacement, the displacement according to
The secondary adjusting screw 131,132,133 by signal trigger mechanism 12, the adjusting screw 131,132,133 respectively drive fine motion and open
Position change occurs respectively, makes for coila trigger element 201,202,203, microswitch contact trigger element 201,202,203
The microswitch 91,92,93 issues corresponding signal, completes the function of gas density relay.I.e. when the gas of electrical equipment
When volume density declines, the Baden pipe 6 and temperature compensating element 7 of gas density relay generate displacement, signal trigger mechanism 12
And then generate displacement, at this time microswitch contact trigger element 201,202,203 also and then generate displacement, to a certain extent when,
The microswitch 91,92,93 is set to issue corresponding signal.In short, when signal trigger mechanism 12 generates displacement, fine motion at this time
Make and break contact trigger element 201,202,203 by microswitch contact trigger element 201,202,203 itself elastic force or according to
By the thrust of the adjusting screw 131,132,133 of signal trigger mechanism 12, make microswitch contact trigger element 201,202,203
Also displacement is and then generated, when arriving setting value, the microswitch is made to issue corresponding alarm or block signal.
Innovative point and core point of the invention is: the microswitch contact triggering being fabricated due to using elastic material
Element, the microswitch contact trigger element trigger machine by the elastic force of microswitch contact trigger element itself or by signal
The thrust of structure makes the microswitch issue corresponding alarm or block signal.And the microswitch that elastic material is fabricated
Contact trigger element and microswitch be it is corresponding be fixed together, it is very close to each other, will not wave, and then essence would not be caused
Degree is deteriorated, and in vibration or transport, the precision of density monitor would not be influenced, so that the precision of density monitor is very stable.
It simultaneously in debugging, is also easy to the very quasi- of precision tune, it is easy to make high-precision density monitor.Simultaneously because adopting
Use microswitch as the signal generator of density monitor, it is ensured that contact is reliably connected, and guarantees system reliably working,
It ensures electric power netting safe running, can apply well in SF6On the electrical equipment of equal gases.It, can be with from table 1 by contrast test
Find out have than the density monitor of the prior art using the contact precision of the density monitor of the art of this patent method, stability
There is better performance, there is substantive distinguishing features outstanding and significant progress, microswitch type density can be greatly improved
The precision and stability of relay ensures the reliable and secure operation of power grid.
It is from table 1 it is recognised that very good using the contact precision of the density monitor of the art of this patent, stability, reach
Density monitor adaptive capacity to environment can be improved in high-precision requirement.Simultaneously, it is important to which its stability is very good, Bu Huiyi
Vibration will be such that precision becomes.
The contact performance comparison table of the density monitor of the density monitor and prior art of 1 the art of this patent of table
Microswitch contact trigger element seperated can also be designed with integrated design (see Figure 11).In addition, such as Figure 11
Shown, the height of 203 front end of microswitch contact trigger element, two side baffle is 2.6-18mm, microswitch contact trigger element
203 front end can also be respectively equipped with one piece of end plate B, and end plate B is together with two side baffle C in microswitch contact trigger element
203 front end, which collectively forms one, can limit the semi enclosed area for adjusting screw disengaging microswitch contact trigger element 203.Using
After the measure, high-precision gas density monitor of the invention can avoid fine motion and open when switching divide-shut brake generation vibration
Coila trigger element and adjusting screw displacement, and adjusting screw is made not block or be detached from microswitch contact triggering member
The phenomenon that part, guarantees system reliably working.Substantially increase the resistance to shock of product.Meanwhile each microswitch contact triggering member
Part front end can be set as rectangular plate with the position that screw contacts is adjusted, and the width of the rectangular plate is 4.4-8mm, avoids making
At microswitch contact trigger element and screw displacement is adjusted, and so that adjusting screw is not blocked or be detached from microswitch and connects
The phenomenon that point trigger element, guarantees system reliably working, further increase the resistance to shock of product.As shown in figure 11, further include
Auxiliary member 26, auxiliary member 26 are fixed on the middle front end of microswitch contact trigger element.Purpose is to improve to be manufactured by elastic material
Made of microswitch contact trigger element local stiffness, due to being fixed on the middle front end of microswitch contact trigger element,
But still ensure that the microswitch contact trigger element being fabricated by elastic material is subjected to displacement (or the deformation such as bending)
Supporting point.Difference when ensuring that contact movement in this way and returning is in an appropriate range, it is ensured that density relay
The differential gap of device meets relevant criterion.
As shown in figure 12, the width of the local E for the microswitch contact trigger element being fabricated by elastic material is
It reduces.That is the width at the E of part is small than the width of front end.Or part is jaggy, or part be it is porose,
At F.In this way, it is equal to the rigidity for improving the front end for the microswitch contact trigger element being fabricated by elastic material,
Difference when ensuring that contact movement in this way and returning is in an appropriate range, it is ensured that the differential gap of density monitor
Meet relevant criterion.In short, the microswitch contact trigger element shape being fabricated by elastic material is various.It is fixed
Mode is also multiplicity.
It is that the shape of the microswitch contact trigger element can be straight or bending as shown in Fig. 4, Fig. 7, Figure 13,
I.e. its shape can be straight or be bent into different angle.
In addition, the hull outside package of the density monitor can be equipped with insulating layer, the influence of the temperature difference is reduced.
In addition it can take: being equipped with anti-vibration pad (such as spring between the pallet of rear, the pallet and shell
Anti-vibration pad), machine core can also the machine core with damping mechanism or indicating value display portion be antivibration machine core (specific antivibration machine core
Including torsional spring), density monitor shell be filled with the measures such as shockproof oil, improve resistance to shock.
And the microswitch and pedestal is located at the two sides of signal regulation mechanism, i.e. microswitch distinguishes position
In the top of signal regulation mechanism corresponding thereto；Or the microswitch and pedestal is located at signal regulation mechanism
Side, i.e. microswitch are located at the lower section of signal regulation mechanism corresponding thereto.
The high-precision density monitor of the inventive technique can also include the holding mechanism after signalizing activity, and may be used also
To include holding mechanism and resetting-mechanism after signalizing activity.
In short, those of ordinary skill in the art it should be appreciated that more than embodiment be intended merely to illustrate this
Invention, and be not used as limitation of the invention, as long as in spirit of the invention, to embodiment described above
Variation, modification will all fall within the scope of claims of the present invention.
Claims (10)
1. it is a kind of improve gas density relay precision method, gas density relay include: gas density relay shell,
Setting the intracorporal pedestal of shell, end seat, Baden pipe, temperature compensating element, signal regulation mechanism and it is several be used as signal generator
Microswitch；One end of the Baden pipe is sealedly connected on the pedestal, and the other end of the Baden pipe is sealedly connected on
It sits up straight, one end of the temperature compensating element, which is connected to, sits up straight, the other end and Signal Regulation of the temperature compensating element
Mechanism is connected；It is characterized in that, the method includes the microswitches to use button-type microswitch；Using elastic material
Expect the microswitch contact trigger element being fabricated, microswitch contact trigger element one end is immobilized in the shell, the other end
It is correspondingly arranged, and is resisted against on the button of each microswitch correspondingly with the button of the button-type microswitch；When
When gas density value changes, the Baden pipe and temperature compensating element generate displacement, which passes sequentially through the signal
Trigger mechanism drives the microswitch contact trigger element, and when gas density value reaches corresponding setting value, the fine motion is opened
The pressing of coila trigger element or the button far from the microswitch, make the microswitch generate corresponding signal, complete
The function of gas density relay；
After gas density value restores normal, the Baden pipe and temperature compensating element generate corresponding displacement, which successively leads to
It crosses the signal trigger mechanism and drives the microswitch contact trigger element, the microswitch contact trigger element is reset to
State when gas density is normal.
2. a kind of method for improving gas density relay precision as described in claim 1, which is characterized in that work as electrical equipment
Gas density decline when, the Baden pipe and temperature compensating element of gas density relay generate displacement, signal trigger mechanism
And then generate displacement, at this time microswitch contact trigger element also and then generate displacement, to a certain extent when, open the fine motion
It closes and issues corresponding signal.
3. a kind of method for improving gas density relay precision as described in claim 1, which is characterized in that due to using
The microswitch contact trigger element that elastic material is fabricated, the microswitch contact trigger element rely on microswitch contact
The elastic force of trigger element itself or the thrust for relying on signal trigger mechanism make the microswitch issue corresponding alarm or locking
Signal, and the microswitch contact trigger element that elastic material is fabricated and microswitch be it is corresponding be fixed together, do not have
There is gap, will not wave, in vibration or transport, will not influence the precision of density monitor, so that the essence of density monitor
Degree is very stable, simultaneously because using signal generator of the microswitch as density monitor, it is ensured that contact is reliably led
It is logical, guarantee system reliably working.
4. a kind of method for improving gas density relay precision as described in claim 1, which is characterized in that further include display
One end of machine core, dial and pointer, the temperature compensating element is connect by display connecting rod with the display machine core or institute
The one end for stating temperature compensating element is directly connect with display machine core, and the pointer is installed on the display machine core and is set to described
Before dial.
5. a kind of method for improving gas density relay precision, including relatively independent signal control portion and indicating value display unit
Point；The signal control portion includes control pedestal, control end seat, control Baden pipe, control temperature compensating element, Signal Regulation
Mechanism and several microswitches as signal generator；One end of the control Baden pipe is sealedly connected on the control pedestal
On, the other end of the control Baden pipe is sealedly connected in control end seat, one end connection of the control temperature compensating element
In control end seat, the other end of the control temperature compensating element is connected with signal regulation mechanism；The indicating value display unit
Divide includes display Baden pipe, displays temperature compensating element, display base, display end seat, display machine core, dial and pointer, institute
The one end for stating display Baden pipe is sealedly connected on the display base, and the other end of the display Baden pipe is sealedly connected on aobvious
Show and sit up straight, one end of the displays temperature compensating element, is connected to the display end and takes, the displays temperature compensating element,
The other end by show connecting rod connect with the display machine core or the other end of the temperature compensating element directly with it is described
Show machine core connection, the pointer is installed on the display machine core and is set to before the dial；
It is characterized in that, the method includes the microswitches to use button-type microswitch；
The microswitch contact trigger element being fabricated using elastic material, microswitch contact trigger element one end are fixed
In shell, the button of the other end and the button-type microswitch is correspondingly arranged, and is resisted against each fine motion correspondingly
On the button of switch；
When gas density value changes, the Baden pipe and temperature compensating element generate displacement, which passes sequentially through institute
It states signal trigger mechanism and drives the microswitch contact trigger element, it is described when gas density value reaches corresponding setting value
The pressing of microswitch contact trigger element or the button far from the microswitch make the microswitch generate corresponding letter
Number, complete the function of gas density relay；
After gas density value restores normal, the Baden pipe and temperature compensating element generate corresponding displacement, which successively leads to
It crosses the signal trigger mechanism and drives the microswitch contact trigger element, the microswitch contact trigger element is reset to
State when gas density is normal.
6. high-precision gas density monitor as claimed in claim 1 or 3, it is characterised in that: further include locating part, locating part
Limitation signal regulation mechanism moves in a certain range, and microswitch contact trigger element is transported in its elastic range always
It is dynamic；The signal regulation mechanism, which is equipped with, adjusts screw；It further include cushioning balance mechanism, which improves density relay
The antivibration of device is horizontal；
It further include position-limit mechanism, when density monitor is vibrated, which ensures signal regulation mechanism in normal work
Make movement in range, and the signal regulation mechanism is limited in a setting by the position-limit mechanism and is greater than density alarming value
Corresponding position；
It further include auxiliary member, auxiliary member is fixed on the middle front end of microswitch contact trigger element, is can be improved altogether by elastic material
The local stiffness for the microswitch contact trigger element being fabricated.
7. high-precision gas density monitor as claimed in claim 1 or 3, it is characterised in that: the microswitch contact
The shape of trigger element is straight or bending shape；The relative position of the microswitch contact trigger element and microswitch can
With horizontal or with gradient；The microswitch contact trigger element front end has with signal regulation mechanism contact site
Effect width is 4-18mm.
8. high-precision gas density monitor as claimed in claim 1 or 3, it is characterised in that: be fabricated by elastic material
Microswitch contact trigger element part width be reduce, or part is jaggy, or part is porose；The temperature
Spending compensating element, is bimetal leaf or the Baden pipe filled with gas；
The signal control part is arranged with anti-error operation mechanism；The gas density relay further includes pressure sensor, temperature
Sensor, signal processing unit, signal transmission unit have remote transfer signal, realize density on-line monitoring.
9. according to claim 1 to a kind of method of raising gas density relay precision described in any one of 8, feature
It is, when gas density value changes, the Baden pipe and temperature compensating element generate displacement, which passes sequentially through institute
It states signal trigger mechanism and drives the microswitch contact trigger element, it is described when gas density value reaches corresponding setting value
Microswitch contact trigger element just presses or the button far from the microswitch, and the microswitch is made to generate corresponding letter
Number, complete the function of gas density relay；
After gas density value restores normal, the Baden pipe and temperature compensating element generate corresponding displacement, which successively leads to
It crosses the signal trigger mechanism and drives the microswitch contact trigger element, the microswitch contact trigger element is reset to
State when gas density is normal.
10. improving the method for gas density relay precision according to claim 9, which is characterized in that when signal triggers machine
When structure generates displacement, microswitch contact trigger element relies on elastic force or the dependence of microswitch contact trigger element itself at this time
The thrust of signal trigger mechanism also and then generates displacement, when arriving setting value, the microswitch sending is made to alarm or close accordingly
Lock signal, when gas density value is normal, the microswitch contact trigger element be reset to gas density it is normal when shape.
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| CN201811136606.2A CN109103050B (en) | 2018-09-28 | 2018-09-28 | Method for improving precision of gas density relay |
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| CN201811136606.2A CN109103050B (en) | 2018-09-28 | 2018-09-28 | Method for improving precision of gas density relay |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109947336A (en) * | 2019-03-14 | 2019-06-28 | 广东美的厨房电器制造有限公司 | Interactive component and household electrical appliance |
| CN110411890A (en) * | 2019-09-04 | 2019-11-05 | 上海乐研电气有限公司 | Realize the non-maintaining on-site detecting device of gas density relay, system and method |
| WO2020062736A1 (en) * | 2018-09-28 | 2020-04-02 | 上海乐研电气有限公司 | Method for improving gas density relay precision and high-precision gas density relay |
| CN117470711A (en) * | 2023-12-28 | 2024-01-30 | 国网江西省电力有限公司电力科学研究院 | Intelligent gas density monitoring device with self-checking function |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3749865A (en) * | 1971-02-24 | 1973-07-31 | Bbc Brown Boveri & Cie | Temperature responsive control switch with bi-metallic disk means |
| DE2926260A1 (en) * | 1979-06-29 | 1981-01-08 | Bbc Brown Boveri & Cie | Gas density monitor for gas filled HV switchgear - has bourdon tube enclosed in gas to operate indicator |
| CN103700541A (en) * | 2014-01-16 | 2014-04-02 | 上海乐研电气科技有限公司 | Thin sulfur hexafluoride gas density relay |
| CN104377051A (en) * | 2014-12-04 | 2015-02-25 | 贵州华阳电工有限公司 | Triggering switch-over device |
| CN105206470A (en) * | 2015-10-27 | 2015-12-30 | 上海乐研电气科技有限公司 | Sulfur hexafluoride gas density relay |
-
2018
- 2018-09-28 CN CN201811136606.2A patent/CN109103050B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3749865A (en) * | 1971-02-24 | 1973-07-31 | Bbc Brown Boveri & Cie | Temperature responsive control switch with bi-metallic disk means |
| DE2926260A1 (en) * | 1979-06-29 | 1981-01-08 | Bbc Brown Boveri & Cie | Gas density monitor for gas filled HV switchgear - has bourdon tube enclosed in gas to operate indicator |
| CN103700541A (en) * | 2014-01-16 | 2014-04-02 | 上海乐研电气科技有限公司 | Thin sulfur hexafluoride gas density relay |
| CN104377051A (en) * | 2014-12-04 | 2015-02-25 | 贵州华阳电工有限公司 | Triggering switch-over device |
| CN105206470A (en) * | 2015-10-27 | 2015-12-30 | 上海乐研电气科技有限公司 | Sulfur hexafluoride gas density relay |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020062736A1 (en) * | 2018-09-28 | 2020-04-02 | 上海乐研电气有限公司 | Method for improving gas density relay precision and high-precision gas density relay |
| CN109947336A (en) * | 2019-03-14 | 2019-06-28 | 广东美的厨房电器制造有限公司 | Interactive component and household electrical appliance |
| CN109947336B (en) * | 2019-03-14 | 2022-02-25 | 广东美的厨房电器制造有限公司 | Interaction assembly and household appliance |
| CN110411890A (en) * | 2019-09-04 | 2019-11-05 | 上海乐研电气有限公司 | Realize the non-maintaining on-site detecting device of gas density relay, system and method |
| CN117470711A (en) * | 2023-12-28 | 2024-01-30 | 国网江西省电力有限公司电力科学研究院 | Intelligent gas density monitoring device with self-checking function |
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| CN109103050B (en) | 2020-06-02 |
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Denomination of invention: A method for improving the accuracy of gas density relay Effective date of registration: 20211118 Granted publication date: 20200602 Pledgee: Shanghai Rural Commercial Bank Co.,Ltd. Huangpu sub branch Pledgor: SHANGHAI ROYE ELECTRIC Co.,Ltd. Registration number: Y2021310000103 |