CN104701079B - A kind of SF of the fluid-filled medium of hermetic type6Gas density relay - Google Patents
A kind of SF of the fluid-filled medium of hermetic type6Gas density relay Download PDFInfo
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- CN104701079B CN104701079B CN201410388189.6A CN201410388189A CN104701079B CN 104701079 B CN104701079 B CN 104701079B CN 201410388189 A CN201410388189 A CN 201410388189A CN 104701079 B CN104701079 B CN 104701079B
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- junction block
- glass
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- sealing
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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
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- Fluid Mechanics (AREA)
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- Casings For Electric Apparatus (AREA)
Abstract
The present invention provides a kind of filling liquid type (or Puffer-type) SF6Gas density relay, it includes shell and setting in the intracorporal ontology of shell (including indication mechanism, contact control section), junction block, junction block installation transition piece, wiring seat sealing element, cover, glass, glass seal.The seal approach of junction block and shell therein is innovated very much, can bring good sealing effect, greatly improves the sealing matter performance of product.Filling liquid type (or Puffer-type) SF of the present invention6Gas density relay appearance is more attractive, and sealing performance is fine, can fill vibrationproof oil with without permeability phenomenon occurs, will not more have water leakage；Or it is made into absolute pressure type density monitor, meet high altitude localities use.
Description
Technical field
The present invention relates to a kind of relay more particularly to a kind of apply in SF6One kind on electrical equipment is fluid-filled
SF6Gas density relay.
Background technique
In industrial circle, in the daily work, in other fields, filling liquid on miscellaneous shell is all largely used
(such as vibrationproof oil) or inflation (such as SF6Gas) instrument, promote the progress and development of civilization of the mankind.Such as chemical industry, electric power, smelting
Gold, the widely applied shock type oil dumped pressure gauge of departments such as water supply, such as electric power, the widely applied oil-filled type electric contact pressure of factory
Table and oil-filled type SF6The more than one hundred million instrument of gas density relay, etc..These instrument all play huge work in respective post
With promoting the fast development of human society.How to guarantee that the intracorporal liquid of the shell of these instrument or gas will not leak,
Guarantee the reliable and secure operation of its system, it has also become one of the vital task of people and work.Because the performance of these instrument is good
The bad reliable and secure operation for directly influencing its related system.These the various instrument of installation on site, after one period
Often there is the intracorporal liquid of its shell or gases did escape problem.From the point of view of practical operation situation, these instrument oil leaks or gas leakage
Phenomenon is very universal, seriously affects the safety of system and reliable, while such as to replace these instrument and spend many funds again.Cause
For junction block and shell in these instrument sealing due to being to take in cambered surface sealing (as shown in Figure 1), sealing effect
It is bad, oil leak or leakage problem can usually occur；Because the observation window in these instrument is also sealing (such as Fig. 2 in small cambered surface
It is shown), sealing effect is bad, and oil leak or leakage problem can usually occur；Because of oil-filled (or inflation) mouth in these instrument
And sealed in small cambered surface, sealing effect is bad, and oil leak or leakage problem can usually occur.
For example, current SF6Electric product has been widely used in power department, industrial and mining enterprises, promotes the fast of power industry
Speed development.Guarantee SF6The reliable and secure operation of electric product has become one of vital task of power department.SF6Electric product
Arc-extinguishing medium and dielectric is SF6Gas leakage cannot occur for gas, if gas leakage occurs, cannot guarantee SF6Electric product is reliable
Safe operation.So monitoring SF6The SF of electric product6Density value is very necessary.It is currently used to monitoring SF6Density is generally adopted
With a kind of pointer type density relay of machinery, has and work as SF6Electric product occurs to alarm and blocking function when gas leakage, also
There is the performance of scene display density value.Density monitor contact used at present mainly uses electric contact type and microswitch type,
Electric contact type density monitor will generally fill the silicone oil of antivibration, and the density monitor of microswitch type is special in some vibrations
Other occasion is also required to fill vibrationproof oil, and at present these oil-filled or inflation density monitors due to its junction block, observation window, fill
The sealing of oil (or inflation) mouth and shell is all to take to seal in cambered surface (or small cambered surface), and sealing effect is bad, usually can
Oil leak or leakage problem occurs, brings loss to user.In addition, in high altitude localities, it is also necessary to the density of absolute pressure type after
Electric appliance or density meter, for the density monitor of absolute pressure type or density meter, it is necessary to which its shell has good sealing
Performance.
Summary of the invention
The purpose of the present invention is to solve the above problem of the existing technology, provides a kind of the fluid-filled of hermetic type
The SF of medium6Gas density relay.The present invention greatly improves the sealing of its shell by its housing seal technology of raising
Performance, to ensure that its system securely and reliably plays great function.
The object of the present invention is achieved like this: a kind of SF of the fluid-filled medium of hermetic type6Gas density relay,
Including shell and be arranged in the intracorporal ontology of shell, ontology include indicating value show with contact control section, it further includes that junction block is close
Sealing mechanism, in the junction block sealing mechanism, including a pedestal made of metal and glass, pedestal pass through junction block and install
Transition piece or directly sealing are fixed on the junction block exit of shell, and junction block is fixed on shell, in addition, the lead-out wire of pedestal and
The lead-out wire of junction block is connected.
A kind of SF of the fluid-filled medium of the hermetic type6Gas density relay, the junction block sealer
In structure, the junction block installation transition piece sealing is fixed on the junction block exit of shell；And junction block installation transition piece and
Sealing element is equipped between junction block, then junction block is fixed on junction block installation transition piece.
A kind of SF of the fluid-filled medium of the hermetic type6Gas density relay, the junction block transition piece
It is seperated or one.
A kind of SF of the fluid-filled medium of the hermetic type6Gas density relay, the junction block transition piece
Outside is added with junction block transition piece Decorative shell.
A kind of SF of the fluid-filled medium of the hermetic type6Gas density relay, on the junction block transition piece
It is cased with an insulation sleeve.
A kind of SF of the fluid-filled medium of the hermetic type6Gas density relay, it further includes observation window sealing
Mechanism, observation window sealing mechanism is by cover, glass, glass seal a and glass seal b group in the observation window sealing mechanism
At；Glass seal a and glass seal b is placed on watchcase or the corresponding groove of glass, and cover is fixed on shell, cover handle
Glass and sealing element compress, and reliable sealing.
A kind of SF of the fluid-filled medium of the hermetic type6Gas density relay, the groove body point on the glass
Not Wei Yu glass and watchcase contact position step side and top surface.
A kind of SF of the fluid-filled medium of the hermetic type6Gas density relay, glass and watchcase contact position platform
Glass seal at the top surface of rank is L shape, and is extended to around glass from glass and watchcase contact surface and cover contact surface.
A kind of SF of the fluid-filled medium of the hermetic type6Gas density relay, the observation window sealing mechanism
Including cover, glass, glass seal a and glass seal b, and the junction of watchcase and glass is equipped with a circle step and is formed and held
Receive the space of a glass sealing ring, another sealing ring is located at glass and cover flange contact surface.
A kind of SF of the fluid-filled medium of the hermetic type6Gas density relay, it further includes and fluid media (medium)
Import sealing mechanism；The fluid media (medium) import sealing mechanism includes being set to fluted in type of tamper evidence, sealed groove placement envelope
Part；Or the density monitor also fixes a transition seat at the medium entrance of its shell, it is fixed with housing seal, close
Sealing is placed on the groove of the transition piece, and the sealing element is fixed and compressed with type of tamper evidence；Or the sealing element is placed on the transition
In groove on part or in the groove of type of tamper evidence；Or sealing element is just placed on face that transition piece is in contact with type of tamper evidence they is indirectly
In the plane of touching.
A kind of SF of the fluid-filled medium of the hermetic type6Gas density relay, the pedestal include annular
Glass and the conduct piece across glass are set in metal shell, metal shell, wherein metal shell and glass, glass and conduct piece
It is sintered into one mutually.
A kind of SF of the fluid-filled medium of the airtightness6Gas density relay is set outside the metal shell
It is fluted.
A kind of SF of the fluid-filled medium of the airtightness6Gas density relay, the pedestal include annular
Metal shell, casting insulated resin in metal shell, and the conduct piece across insulating resin.
A kind of SF6 gas density is relay of the fluid-filled medium of hermetic type, the pedestal and junction block are
One.
The present invention has carried out very big innovation for housing seal mode, keeps its housing seal performance more preferable, will not occur
Leak vibrationproof oil or gas leakage and infiltration phenomenon.More importantly this relay can fill vibrationproof oil, it can also be with inflatable body, significantly
Product quality is improved, products application range is greatly improved, can accomplish good absolute pressure requirement.
Detailed description of the invention
Fig. 1 is the terminal base structure schematic diagram of the sulfur hexafluoride gas density relay of the prior art；
Fig. 2 is the observation window structural schematic diagram of the pointer sulfur hexafluoride gas density relay of the prior art；
Fig. 3 is 1 schematic diagram of junction block sealing mechanism embodiment of the invention；
Fig. 4 is the cross-sectional view of junction block sealing mechanism embodiment 1 of the invention；
Fig. 5 is 2 schematic diagram of junction block sealing mechanism embodiment of the invention；
Fig. 6 is 3 schematic diagram of junction block sealing mechanism embodiment of the invention；
Fig. 7 is 1 schematic diagram of observation window sealing mechanism of the invention and medium entrance sealer embodiment；
Fig. 8 is 2 schematic diagram of observation window sealing mechanism of the invention and medium entrance sealer embodiment；
Fig. 9 is 3 schematic diagram of observation window sealing mechanism of the invention and medium entrance sealer embodiment；
Figure 10 is 4 schematic diagram of observation window sealing mechanism of the invention and medium entrance sealer embodiment；
Figure 11 is 5 schematic diagram of observation window sealing mechanism of the invention and medium entrance sealer embodiment；
Figure 12 is 6 schematic diagram of observation window sealing mechanism of the invention and medium entrance sealer embodiment；
Figure 13 is the cross-sectional view of pedestal embodiment 1 of the invention；
Figure 14 is the end view of pedestal shown in Figure 13；
Figure 15 is the schematic diagram of the pedestal other end shown in Figure 13；
Figure 16 is the schematic diagram of the embodiment 2 of pedestal；
Figure 17 is the appearance diagram of pedestal shown in Figure 16；
Figure 18 is the schematic diagram of pedestal embodiment 3；
Figure 19 is the schematic diagram of pedestal embodiment 4.
Specific embodiment
Please refer to Fig. 3 and Fig. 4, a kind of SF of the fluid-filled medium of hermetic type of the invention6Gas density relay
The first terminal base structure schematic diagram, mainly by shell 1 and setting the intracorporal ontology of shell (including indicating value show and contact control
Part does not mark in figure), junction block sealing mechanism.For the seal approach of junction block and watchcase: being exported in the junction block of watchcase
Chimb (or plane or concave surface or cambered surface) fix junction block installation transition piece 121 and 122, it and watchcase 1 are sealings
Fixed, it can take and be welded and fixed.One pedestal 21 made of metal and glass, the sealing of pedestal 21 are fixed on junction block installation
On transition piece 121, wherein pedestal 21 can be fixed on junction block installation transition piece 121 with welded seal or pedestal 21 can be with
It is fixed on junction block installation transition piece 121 with sealing ring sealing, and junction block 6 is fixed on junction block installation transition piece 122,
Also, the lead-out wire of pedestal 21 is connected with the lead-out wire of junction block 6.It, can also be in junction block mistake in order to improve its aesthetics
The outside for crossing part 121 and 122 adds a junction block transition piece Decorative shell 15.The close of it can be greatly improved by improving in this way
Sealing property.In addition pedestal 21 can directly seal the junction block exit for being fixed on shell 1, and junction block 6 can be fixed directly
On pedestal 21 or junction block 6 can be directly anchored on shell 1.
Referring to Fig. 5, Second Linking Method holder structure schematic diagram, density monitor of the invention is mainly by shell 1 and setting
In the intracorporal ontology of shell (including indicating value is shown and contact control section, does not mark in figure), junction block sealing mechanism.For wiring
The seal approach of seat and watchcase: a wiring is fixed in the chimb (or plane or concave surface or cambered surface) that the junction block of watchcase exports
Seat installation transition piece 121 and 122, it and watchcase 1 are that sealing is fixed, can take and be welded and fixed.Wiring is sat sealing element 7 and is placed on
Junction block is installed on the groove of transition piece 121, and then junction block 6 is fixed on junction block installation transition piece 122.In order to improve it
Aesthetics, a junction block transition piece Decorative shell 15 can also be added in the outside of junction block transition piece, in order to improve wiring
Electric insulation can also cover a upper insulation sleeve 14 on junction block transition piece.By handling above, we can be original people
The technology that seals in the cambered surface taken always be changed to flat seal, its leakproofness can be greatly improved by improving in this way
Energy.
Referring to Fig. 6, the third terminal base structure of the invention, the present invention mainly by shell 1 and is arranged intracorporal in shell
Ontology (including indicating value is shown and contact control section, does not mark in figure), junction block sealing mechanism.The transition piece can be one
Change, is formed by 12.And the sealing element 7 is placed in the groove of junction block 6.In addition the face that transition piece is in contact with wiring can also be with
It is entirely a plane, which just puts in the plane contacted between them.
Referring to Fig. 7, the first observation window sealed structural schematic diagram of the invention, wherein observation window sealing mechanism is by cover
2, glass 4, glass seal a31 and glass seal b32 composition, wherein glass 4 is that there are two groove, glass seal a for band
It being placed on the groove of the glass with glass seal b, cover 2 is fixed on shell 1, and cover 2 compresses glass 4 and sealing element,
And reliable sealing.Due to keeping its sealing more reliable using 2 sealings.
Referring to Fig. 8, second of observation window sealed structural schematic diagram of the invention, wherein observation window sealing mechanism by cover 2,
Glass 4, glass seal a31 and glass seal b32 composition, wherein glass 4 is with a groove, glass seal a31
It is placed on the groove of the glass, and glass seal a32 is profile seal part, is placed between glass 4 and watchcase 1, cover 2 is fixed
On shell 1, cover 2 compresses glass 4 and sealing element, and reliable sealing.Due to keeping its sealing more reliable using 2 sealings.
Referring to Fig. 9, the third observation window sealed structural schematic diagram of the invention, compared with Fig. 6, watchcase 1 is straight mouth.
Referring to Fig. 10, the 4th kind of observation window sealed structural schematic diagram of the invention, compared with Fig. 7, watchcase 1 is straight mouth.
Figure 11 or 12 is please referred to, the 5th kind of observation window sealed structural schematic diagram of the invention, compared with Fig. 8, watchcase 1 is band
There is sealing element step.
The above case, shell 1 and 4 contact position band of glass are fluted, and glass seal a and glass seal b are placed on the shell
On the groove of body, cover is fixed on shell, and cover compresses glass and sealing element, and reliable sealing.
Please refer to Fig. 7 to 12, seal approach of the present invention for medium entrance: medium is hydraulic oil or inert gas, is seen
Fig. 7, oil filled port type of tamper evidence 18 is directly fluted, and sealing element 17 is placed in the groove, and then oil filled port type of tamper evidence 18 is directly solid
It is scheduled on watchcase 1.See Fig. 8 to Figure 12, further includes oil-filled (or inflation) mouth transition seat 19, oil-filled mouthful seal 17, oil filled port blocking
Part 18.One oil-filled (or inflation) is fixed in the chimb (or convex flat face or concave plane or cambered surface) of the oil filled port of watchcase to make a slip of the tongue and cross
Seat 19, it and watchcase 1 seal fixed (can take and be welded and fixed).Oil-filled mouthful seal 17 is placed on the groove of the transition piece 19
On, then the sealing element is fixed and compressed with oil filled port type of tamper evidence 18.The sealing element 17 is placed on the groove on the transition piece 19
In；It can also be placed in the groove of type of tamper evidence 18；The face that the transition piece 19 is in contact with oil filled port type of tamper evidence 18 can also be complete
It is a plane, which just puts in the plane contacted between them.As shown in fig. 7, we can be oil-filled (or inflation)
The mouth sealing of transition seat 19 is fixed to be placed in the groove of the transition seat 19 on watchcase 1, then oil-filled mouthful seal 17 (as welded),
Then oil filled port type of tamper evidence 18 is fixed on the transition seat 19 again, thus can use oil filled port type of tamper evidence 18 sealing element
17 compress, and reach good sealing effect, can oil sealing or envelope gas.By handling above, we always can be adopted original people
The technology sealed in the small cambered surface taken is changed to planar band groove or big flat seal, can greatly improve it by improving in this way
Sealing performance.
The sealing performance of the pedestal is highly important and of the invention most crucial innovative point, most critical innovative point,
Most important innovative point, there are many embodiments, are illustrated separately below:
Embodiment 1
Figure 13 to 15 is please referred to, the pedestal 21 made of metal and glass includes the metal shell 211 of annular, the metal-back
Glassy layer 212 and the conduct piece 213 across glassy layer 212 are set in body 211, wherein shell 211, glass 212, conduct piece 213 are logical
A mold is crossed through oversintering into one, so that it is guaranteed that sealing, can thoroughly seal up gas or liquid.Wherein shell 211
It is fluted in outer circle, it can be sealed connected together with other parts by sealing ring.
Embodiment 2
Figure 16 to 17 is please referred to, the difference with embodiment 1 is, the conduct piece 213 of embodiment 1 is distributed in one
On annulus, and the conduct piece of the present embodiment is distributed on the center of circle of annulus and the annulus.
Embodiment 3
Please refer to Figure 18, the present embodiment and embodiment 1 the difference is that, its 212 middle section of metal shell is
One is equipped with the baffle in hole passed through for conduct piece 213, between each conduct piece 213 and shell filling glass 212 to be isolated, and
Shell 211, glass 212, conduct piece 213 are equally integral by high temperature sintering by a mold, to ensure to seal, thoroughly may be used
To seal up gas or liquid.
Embodiment 4
Please refer to Figure 19, it is fluted in the middle part of 211 inner ring of metal shell of the present embodiment, and by the glass of foregoing embodiments
Glass layer is changed to insulating resin layer 212；Metal shell 211, insulating resin 212, conduct piece 213 are bonded to one each other, it is ensured that
Sealing, can thoroughly seal up gas or liquid.Insulating resin in the present embodiment can according to need and use asphalt mixtures modified by epoxy resin
The exhausted resin such as rouge, phenolic resin, polyester resin, polyamide, polysulfone resin, polyimide resin or polyflon
Casting or pressure injection form.
Lead-out wire just because of density monitor uses pedestal sealing technique, and sealing effect beyond imagination can
Thoroughly to solve the Leakage of oil-filled type density monitor, this is most crucial innovative point of the invention, most critical innovative point,
Most important innovative point.
The pedestal 21 and junction block 6 of density monitor of the invention can be directly made of one, and further increase leakproofness
Energy.In addition the shape of shell 211 can also be other shapes other than annular.
Those of ordinary skill in the art it should be appreciated that more than embodiment be intended merely to illustrate the present invention,
And be not used as limitation of the invention, as long as the change in spirit of the invention, to embodiment described above
Change, modification will all be fallen within the scope of claims of the present invention.
Claims (13)
1. a kind of SF of the fluid-filled medium of hermetic type6Gas density relay, including shell and setting are at intracorporal, shell
Body, the ontology include that indicating value is shown and contact control section, it is characterised in that: it further includes junction block sealing mechanism, observation
Window sealing structure and medium entrance sealing structure；
Wherein, in the junction block sealing mechanism, for the seal approach of junction block and watchcase: junction block installation transition piece is fixed
On the chimb that the junction block of watchcase exports, the junction block is fixed on junction block installation transition piece, while described being connect
The contact surface of line seat and junction block installation transition piece is plane；In the junction block sealing mechanism, for junction block with
The seal approach of watchcase: including a pedestal, the pedestal installs transition piece by the junction block or directly sealing is fixed on institute
The junction block exit of shell is stated, the junction block is fixed on the housing, in addition, the lead-out wire of the pedestal and the wiring
The lead-out wire of seat is connected；
The observation window sealing mechanism is made of cover, glass, glass seal a and glass seal b, wherein the glass
With a groove, the glass seal a is placed on the groove of the glass, and the glass seal a is abnormal shape
Sealing element is placed between the glass and the watchcase, and the cover is fixed on the housing, and the cover is the glass
It is compressed with the sealing element；
The medium entrance sealing structure includes oil filled port transition seat, oil-filled mouthful seal, oil filled port type of tamper evidence, and described oil-filled
Fluted a is set on mouth transition seat, and the oil filled port transition seat sealing is fixed on the watchcase, and the oil-filled mouthful seal is set
In the groove a of the oil filled port transition seat, the oil filled port type of tamper evidence is fixed on the oil filled port transition seat.
2. a kind of SF of the fluid-filled medium of hermetic type according to claim 16Gas density relay, feature exist
In: in the junction block sealing mechanism, the junction block installation transition piece sealing is fixed on the wiring of the shell
Seat exit；And it is equipped with sealing element between the junction block installation transition piece and the junction block, then the junction block is fixed
On junction block installation transition piece.
3. a kind of SF of the fluid-filled medium of hermetic type as claimed in claim 1 or 26Gas density relay, feature exist
What it is in: the junction block and transition piece is seperated or one.
4. a kind of SF of the fluid-filled medium of hermetic type as claimed in claim 1 or 26Gas density relay, feature exist
In: the outside of the junction block installation transition piece is added with junction block transition piece Decorative shell.
5. a kind of SF of the fluid-filled medium of hermetic type as claimed in claim 1 or 26Gas density relay, feature exist
In: an insulation sleeve is cased on the junction block installation transition piece.
6. a kind of SF of the fluid-filled medium of hermetic type as described in claim 16Gas density relay, it is characterised in that:
It further includes observation window sealing mechanism, and observation window sealing mechanism is by cover, glass, glass capsulation in the observation window sealing mechanism
Part a and glass seal b composition；The glass seal a and the glass seal b are placed on the watchcase or the glass pair
On the groove answered, the cover is fixed on the housing, and the cover compresses the glass and sealing element, and reliable close
Envelope.
7. a kind of SF of the fluid-filled medium of hermetic type as claimed in claim 66Gas density relay, it is characterised in that:
The observation window sealing mechanism includes cover, glass, glass seal a and glass seal b, and the watchcase and the glass
Junction be equipped with one circle step formed accommodate a glass sealing ring space.
8. a kind of SF of the fluid-filled medium of hermetic type as described in claim 1 or 66Gas density relay, feature exist
In: it further includes and fluid media (medium) import sealing mechanism；The fluid media (medium) import sealing mechanism includes being set in type of tamper evidence to have
Groove, the groove place sealing element.
9. a kind of SF of the fluid-filled medium of hermetic type according to claim 86Gas density relay, feature exist
In, the density monitor also fixes a transition seat at the medium entrance of its shell, it is fixed with the housing seal,
Sealing element is placed on the groove of the transition piece, and the sealing element is fixed and compressed with type of tamper evidence；Or the sealing element is placed on the mistake
It crosses in the groove on part or in the groove of type of tamper evidence；Or sealing element is just placed on face that transition piece is in contact with type of tamper evidence between them
In the plane of contact.
10. a kind of SF of the fluid-filled medium of hermetic type according to claim 16Gas density relay, feature exist
Include the metal shell of annular, set glass and the conduct piece across glass in metal shell in, the pedestal, wherein the gold
Belong to shell and the glass, the glass and the conduct piece are sintered into one mutually.
11. a kind of SF of the fluid-filled medium of hermetic type according to claim 106Gas density relay, feature
It is, groove is equipped with outside the metal shell.
12. a kind of SF of the fluid-filled medium of hermetic type according to claim 16Gas density relay, feature exist
In the pedestal includes the metal shell of annular, casting insulated resin in the metal shell, and the conduction across insulating resin
Part.
13. a kind of SF of the fluid-filled medium of hermetic type according to claim 16Gas density relay, feature exist
In: the pedestal and the junction block be integrated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410388189.6A CN104701079B (en) | 2013-12-04 | 2014-08-08 | A kind of SF of the fluid-filled medium of hermetic type6Gas density relay |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320784811 | 2013-12-04 | ||
| CN2013207848116 | 2013-12-04 | ||
| CN201410388189.6A CN104701079B (en) | 2013-12-04 | 2014-08-08 | A kind of SF of the fluid-filled medium of hermetic type6Gas density relay |
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| Publication Number | Publication Date |
|---|---|
| CN104701079A CN104701079A (en) | 2015-06-10 |
| CN104701079B true CN104701079B (en) | 2019-06-21 |
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| CN201420446187.3U Expired - Fee Related CN204537936U (en) | 2013-12-04 | 2014-08-08 | A kind of SF of fluid-filled medium of hermetic type 6gas density relay |
| CN201410388189.6A Active CN104701079B (en) | 2013-12-04 | 2014-08-08 | A kind of SF of the fluid-filled medium of hermetic type6Gas density relay |
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| CN201420446187.3U Expired - Fee Related CN204537936U (en) | 2013-12-04 | 2014-08-08 | A kind of SF of fluid-filled medium of hermetic type 6gas density relay |
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| CN204537936U (en) * | 2013-12-04 | 2015-08-05 | 上海乐研电气科技有限公司 | A kind of SF of fluid-filled medium of hermetic type 6gas density relay |
| CN108037042B (en) * | 2018-01-12 | 2024-04-09 | 上海乐研电气有限公司 | Gas density meter |
| CN113097915B (en) * | 2021-04-06 | 2022-10-14 | 国网新疆电力有限公司超高压分公司 | Monitoring alarm system containing GIS circuit breaker monitoring component |
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| CN204537936U (en) * | 2013-12-04 | 2015-08-05 | 上海乐研电气科技有限公司 | A kind of SF of fluid-filled medium of hermetic type 6gas density relay |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7628068B2 (en) * | 2007-10-24 | 2009-12-08 | Ashcroft, Inc. | Case, window and gasket for measuring device |
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- 2014-08-08 CN CN201420446187.3U patent/CN204537936U/en not_active Expired - Fee Related
- 2014-08-08 CN CN201410388189.6A patent/CN104701079B/en active Active
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|---|---|---|---|---|
| CN201004425Y (en) * | 2007-01-23 | 2008-01-09 | 上海乐研电气科技有限公司 | Sealing device for contact out line of gas density relay |
| CN102386016A (en) * | 2010-09-01 | 2012-03-21 | 上海乐研电气科技有限公司 | Absolute pressure type gas-density relay |
| CN202434357U (en) * | 2012-01-18 | 2012-09-12 | 蚌埠市立群电子有限公司 | Novel circular glass sealing wiring terminal |
| CN204537936U (en) * | 2013-12-04 | 2015-08-05 | 上海乐研电气科技有限公司 | A kind of SF of fluid-filled medium of hermetic type 6gas density relay |
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| CN204537936U (en) | 2015-08-05 |
| CN104701079A (en) | 2015-06-10 |
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