CN204230151U - A kind of gas density relay of exempting to dismantle when verifying - Google Patents
A kind of gas density relay of exempting to dismantle when verifying Download PDFInfo
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- CN204230151U CN204230151U CN201420610089.9U CN201420610089U CN204230151U CN 204230151 U CN204230151 U CN 204230151U CN 201420610089 U CN201420610089 U CN 201420610089U CN 204230151 U CN204230151 U CN 204230151U
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- gas density
- density relay
- verification interface
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Abstract
The gas density relay dismantled is exempted from when the utility model discloses a kind of verification, comprise: housing, and pedestal, pressure detector, temperature compensating element, movement, pointer, dial, some signal generators and the equipment connection joint be located in described housing, also comprise: verification interface and valve; One end of described valve is connected with described equipment connection joint, and the other end of described valve is connected with described verification interface; Described verification interface is connected with described pressure detector by described pedestal.Exempt from the gas density relay dismantled during the verification that the utility model provides, tool has the following advantages: substantially the same with common density monitor, can install in all case, thoroughly overcomes Valve joint volume large, in the problem that a lot of place cannot be installed; Can save and install valve type three-way joint additional, save material greatly, there is the very high value of environmental protection, save cost simultaneously, be beneficial to and apply; Good seal performance, coefficient of safety is high, and structure is simple, and volume is little.
Description
Technical field
The utility model relates to technical field of electric power, exempts from the gas density relay dismantled when being specifically related to a kind of verification.
Background technology
Sulphur hexafluoride (SF6) gas density relay (containing density meter, Pressure gauge) is used to the change of the sulfur hexafluoride gas density detected in sulphur hexafluoride electric switch, and its performance quality directly has influence on the reliable and secure operation of sulphur hexafluoride electric switch.Be installed on on-the-spot sulfur hexafluoride gas density relay because of infrequently action, often there is the phenomenon of the dumb or poor contact of contacts of action in after date through one section time, the temperature-compensating performance that also there will be had is deteriorated, and easily causes sulfur hexafluoride gas density relay misoperation when variation of ambient temperature.Therefore testing regulations regulation: each sulphur hexafluoride electric switch applying unit should regularly verify sulfur hexafluoride gas density relay.From practical operation situation, carrying out periodic check to the sulfur hexafluoride gas density relay at scene is prevent trouble before it happens, and ensures one of necessary means of power equipment safety reliability service.Fig. 1 is the structural representation of the gas density relay of prior art, and when verifying at the scene, the plinth of the gas density relay of prior art is the type of attachment adopting non-return valve.Current verification or the density monitor changing this type of attachment just can only unload three-way connection seat, and it and Switch main body are departed from, that is: make non-return valve and non-return valve separately, then start verification or change relay.Due on sulphur hexafluoride electric switch because of the non-return valve that non-return valve is self-closed, therefore can not leak gas.But due to the risk damaging sealing ring can be there is in unloading process, the risk of gas leakage therefore still can be there is.In addition, in order to coordinate verification density monitor, market also has a kind of valve-type density monitor three-way connection, although solve verification do not dismantle problem by installing this product additional, but Reconstruction in field is complicated, cost is very high, and some places do not have space to install this valve-type density monitor joint additional at all, are difficult to carry out.In order to solve the problem, so need improvement and bring new ideas, namely wish a kind of gas density relay need not dismantled with regard to verifying, can provide safeguard, for work about electric power person provides convenience for the safety of electrical network.
Utility model content
The utility model provides the gas density relay exempting from during a kind of verification to dismantle, and for solving the gas density relay of prior art when verifying, needing dismounting to depart from gas density relay or installing the problem that three-way valve joint could verify in addition additional.
The gas density relay dismantled is exempted from during the verification that the utility model provides, comprise: housing, and pedestal, pressure detector, temperature compensating element, movement, pointer, dial, some signal generators and the equipment connection joint be located in described housing, also comprise: verification interface and valve;
One end of described valve is connected with described equipment connection joint, and the other end of described valve is connected with described verification interface; Described verification interface is connected with described pressure detector by described pedestal.
Further, described pedestal and described equipment connection joint are structure as a whole.
Further, described signal generator comprises: sensitive switch or magnetic help formula electric contact; Described pressure detector comprises: Baden's pipe or bellows.
Further, described verification interface is provided with closeouts.
Further, be provided with some shutoff seals between described closeouts and described verification interface, described shutoff seal comprises: rubber ring, rubber blanket or O shape circle.
Further, described valve adopts cut-out cock or check-valves, and described cut-out cock comprises: ball valve, butterfly valve, gate valve, break valve, plug valve, butterfly valve, needle valve or diaphragm valve.
Further, the cut-off spool of described cut-out cock is provided with and blocks seal, described in block seal and comprise: the rubber parts on spool is being blocked in rubber ring, rubber blanket, polytetrafluoroethylene or sulfuration.
Further, described verification interface is arranged on the inside of described housing, side, front or bottom rear.
Further, described verification interface is arranged on described equipment connection joint or electric equipment.
Further, on the inside that described valve is arranged on described housing or side, or described valve is arranged on described equipment connection joint, or described valve is arranged on electric equipment.
Further, described verification interface is provided with Self-sealing valve.
Further, some seals are provided with between the valve rod of described valve and valve body.
Further, the spool of described valve adopts hard encapsulant.
Further, described valve is provided with self-locking connection mechanism.
Further, described valve and described verification interface are structure as a whole.
Further, described valve seal is in cavity.
Further, gas density relay of the present utility model also comprises: some transducer connectors, and described transducer connector is used for connecting: the micro-water sensor of Gas Density Sensor, gas or gas analyte transducer.
Exempt from the gas density relay dismantled during the verification that the utility model provides, tool has the following advantages:
One, the profile of density monitor of the present utility model is substantially the same with common density monitor, can install in all case, thoroughly overcomes three-way valve joint volume large, in the problem that a lot of place cannot be installed;
Two, adopt density monitor of the present utility model, just can save and install valve type three-way joint additional, save material greatly, there is the very high value of environmental protection, save cost simultaneously, be beneficial to and apply;
Three, density monitor good seal performance of the present utility model, coefficient of safety is high, and structure is simple, and volume is little.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings;
Fig. 1 is the structural representation of the gas density relay of prior art;
Fig. 2 be the gas density relay of the utility model embodiment one face partial cutaway schematic;
Fig. 3 be the gas density relay of the utility model embodiment two face partial cutaway schematic;
Fig. 4 be the gas density relay of the utility model embodiment three face partial cutaway schematic;
Fig. 5 is the side-looking partial cutaway schematic of the gas density relay of the utility model embodiment four;
Fig. 6 is the side-looking partial cutaway schematic of the gas density relay of the utility model embodiment five;
Fig. 7 be the gas density relay of the utility model embodiment six face partial cutaway schematic.
Embodiment:
For making the object of the utility model embodiment, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Embodiment one
Fig. 2 be the gas density relay of the utility model embodiment one face partial cutaway schematic, as shown in Figure 2, the gas density relay dismantled is exempted from during the verification of the utility model embodiment one, comprise: housing 101, and be located at pedestal 102 in described housing, pressure detector 103, temperature compensating element 104, movement 105, pointer 106, dial 107, end seat 108, some signal generators 109 and equipment connection joint 110, and verification interface 2 and valve 3.One end of described valve 3 is connected with described equipment connection joint 110, and the other end of described valve 3 is connected with described verification interface 2; Described verification interface 2 is connected with described pressure detector 103 by described pedestal 102.Verification interface 2 can be designed as the mode connected fast, increases work efficiency further.
Wherein, one end of pressure detector 103 and one end of temperature compensating element 104 are all fixed on end seat 108, the other end of pressure detector 103 is connected on pedestal 102, the other end of temperature compensating element 104 is connected with movement 105 by display connecting rod or the other end of temperature compensating element 104 is directly connected with movement 105, and pointer 106 to be installed on movement 105 and before being located at dial 107.Described signal generator 109 can adopt sensitive switch or magnetic to help formula electric contact.Described pressure detector 103 can adopt Baden to manage or bellows.Temperature compensating element 104 can adopt the gas of compensating plate or housing inner sealing.Gas density relay of the present utility model can also comprise: oil-filled type density monitor, without oil type density monitor, air density meter, gas density switch or gas gauge.
In the gas density relay of the utility model embodiment one, based on pressure detector 103 and utilize temperature compensating element 104 to change pressure and temperature revise, to reflect the change of sulfur hexafluoride gas density.Namely under the pressure effect of measured medium sulphur hexafluoride (SF6) gas, owing to there being the effect of temperature compensating element 104, during the change of sulfur hexafluoride gas density value, the force value of sulfur hexafluoride gas also changes accordingly, force the end of pressure detector 103 to produce corresponding strain displacement, by means of temperature compensating element 104, pass to movement 105, movement 105 passes to again pointer 106, then tested sulfur hexafluoride gas density value is indicated on dial 107.Signal generator 109 is as output alarm locking contact.Such gas density relay just can show sulfur hexafluoride gas density value.If leaked gas, sulfur hexafluoride gas density value have dropped, pressure detector 103 produces corresponding oppositely displacement, by temperature compensating element 104, passes to movement 105, movement 105 passes to again pointer 106, pointer 106 is just walked toward the direction that indicating value is little, concrete display gas leakage degree on dial 107, and is outputed signal by signal generator 109, sulfur hexafluoride gas density in the equipment such as monitoring and controlling electric switch, makes electric equipment trouble free service.So just complete gas density relay function, or the function of air density meter (gas gauge) display density (pressure).As shown in Figure 2, the valve 3 of density monitor is arranged on the equipment connection joint 110 of gas density relay, and verification interface 2 is arranged on housing 101.In gas circuit, one end of valve 3 is connected with equipment connection joint 110 by switch gas circuit connector 401, the other end of valve 3 is connected with verification interface 2 by verification interface gas circuit connector 402, and verification interface 2 is connected with pedestal 102, pressure detector 103 by relay gas circuit connector 403.The operation principle of the gas density relay of the utility model embodiment is as follows: when valve 3 is opened, in gas circuit, equipment connection joint 110 is connected with pressure detector 103 with pedestal 102, and gas density relay is in normal operating conditions; And when verifying, valve-off 3, in gas circuit, equipment connection joint 4 is not connected with pedestal 102, pressure detector 103, and a verification transition joint is connected verification interface 3, and verification transition joint is communicated with the pressure detector 103 of gas density relay, just can complete and need not dismantle gas density relay and just can verify.Valve 3 can be various, can adopt cut-out cock, such as ball valve, butterfly valve, gate valve, break valve, plug valve, butterfly valve, needle valve, diaphragm valve etc.Ball valve in this way, can drive ball valve closing switch equipment airway by rotating self-styled spool.Verification interface 2 can also be provided with closeouts 5, and when guaranteeing to run, verification interface 2 is sealings.The valve 3 of density monitor is arranged on the position of the equipment connection joint 110 of gas density relay, angle and direction is various, such as be arranged on the side (the present embodiment), front etc. of equipment connection joint 110, specifically can flexible design according to actual needs.
Embodiment two
Fig. 3 be the gas density relay of the utility model embodiment two face partial cutaway schematic, as shown in Figure 3, described verification interface 2 is fixed on the lower right corner of the housing 101 of gas density relay, the i.e. below of junction block 111, the valve 3 of gas density relay is arranged on the equipment connection joint 110 of gas density relay, and verification interface 2 is arranged on housing 101.In gas circuit, one end of valve 3 is connected with equipment connection joint 110, the other end of valve 3 is connected with verification interface 2 by verification interface gas circuit connector 402, and verification interface 2 is connected with pedestal 102, pressure detector 103 by relay gas circuit connector 403.When valve 3 is opened, in gas circuit, equipment connection joint 110 is connected with pedestal 102, pressure detector 103, and gas density relay is in normal operating conditions; And when valve 3 is closed, in gas circuit, equipment connection joint 110 is not connected with pedestal 102, pressure detector 103, and a verification transition joint is connected described verification interface 2, and verification transition joint is communicated with the pressure detector 103 of relay, just can complete and need not dismantle gas density relay and just can verify.Described verification interface 2 is fixed on position on described gas density relay, angle and direction is various, as the inside, side, front, bottom, equipment connection joint etc. of housing can be fixed on, and specifically can flexible design according to actual needs.Further, described verification interface 2 is fixed on position on the housing 101 of described density monitor or equipment connection joint 110, angle and direction is various, specifically can flexible design according to actual needs.And described valve 3 is fixed on position on described gas density relay, angle and direction is various, as the inside, side, front, bottom, equipment connection joint etc. of housing can be fixed on, specifically can flexible design according to actual needs.Further, described valve 3 is fixed on position on the housing 101 of described density monitor or equipment connection joint 110, angle and direction is various, specifically can flexible design according to actual needs.Verification interface 2 is also provided with closeouts 5, and when guaranteeing to run, verification interface 8 is sealings.
Embodiment three
Fig. 4 be the gas density relay of the utility model embodiment three face partial cutaway schematic, as shown in Figure 4, described verification interface 2 is fixed on the lower right corner of the housing 101 of described gas density relay, the i.e. below of junction block 111, the valve 3 of gas density relay is arranged on housing 101, and verification interface 2 is arranged on housing 101.In gas circuit, one end of valve 3 is connected with equipment connection joint 110 by switch gas circuit connector 401, the other end of valve 3 is connected with verification interface 2 by verification interface gas circuit connector 402, and verification interface 2 is connected with pedestal 102, pressure detector 103 by relay gas circuit connector 403.When valve 3 is opened, in gas circuit, equipment connection joint 110 is connected with pedestal 102, pressure detector 103, and gas density relay is in normal operating conditions; And when valve 3 is closed, in gas circuit, equipment connection joint 110 is not connected with pedestal 102, pressure detector 103, and a verification transition joint is connected described verification interface 2, and verification transition joint 2 is connected with the pressure detector 103 of relay, just can complete and need not dismantle density monitor and just can verify.
Embodiment four
Fig. 5 is the side-looking partial cutaway schematic of the gas density relay of the utility model embodiment four, as shown in Figure 5, described verification interface 2 is fixed on housing 101 bottom rear of described density monitor, and the valve 3 of density monitor is arranged on housing 101 bottom rear.In gas circuit, one end of valve 3 is connected with equipment connection joint 110 by switch gas circuit connector 401, the other end of valve 3 is connected with verification interface 2 by verification interface gas circuit connector 402, verification interface 2 by relay gas circuit connector 403 with pedestal 102 (in the present embodiment, pedestal 102 is integrated with equipment connection joint), pressure detector 103 is connected, described pedestal 102 is integrated mechanism design with equipment connection joint 110.Described valve 3 is sealed in cavity 6, and when guaranteeing to run, valve 3 is positiver sealings.
Embodiment five
Fig. 6 is the side-looking partial cutaway schematic of the gas density relay of the utility model embodiment five, and as shown in Figure 6, described valve 3, verification interface 2 are arranged on the equipment connection joint 110 of described density monitor.In gas circuit, one end of valve 3 is connected with equipment connection joint 110, the other end of valve 3 is connected with verification interface 2, verification interface 2 is connected with pedestal 102, pressure detector 103 by relay gas circuit connector 403, and described pedestal 102 is structure as a whole with equipment connection joint 110 and designs.Further, described valve 3, verification interface 2 are integrated with relay gas circuit connector 403 and design, and guarantee that reliability is higher, sealing is better.
Embodiment six
Fig. 7 be the gas density relay of the utility model embodiment six face partial cutaway schematic, as shown in Figure 7, described valve 3, verification interface 2 be arranged on SF6 electric equipment.In gas circuit, one end of valve 3 is connected with equipment connection joint 110 by switch gas circuit connector 401, the other end of valve 3 is connected with verification interface 2, verification interface 2 is connected with pedestal 102, pressure detector 103 by relay gas circuit connector 403, and described pedestal 102 is integrated with equipment connection joint 110 and designs.In addition, described valve 3 is structure as a whole with verification interface 2.
In whole like this School Affairs valve operation process, just need not dismantle and depart from sulfur hexafluoride gas density relay or install valve threeway seat additional, for the operation of electric power overhaul personnel brings convenience, guarantee the safe handling of sulfur hexafluoride electrical equipment.
Density monitor of the present utility model can also directly with gas density transmitter, Gas Density Sensor, gas micro-water transmitter, the micro-water sensor of gas or transducer connector, and transducer connector can also connect gas density transmitter, Gas Density Sensor, gas micro-water transmitter, the micro-water sensor of gas or gas analyte transducer.The quantity of transducer does not limit in the utility model, gas density transmitter or Gas Density Sensor are used for the on-line monitoring of density, gas micro-water transmitter or the micro-water sensor of gas are used for the on-line monitoring of micro-water, and gas analyte transducer is used for the on-line monitoring of analyte.The telemetering type gas density relay dismantled is exempted from, for intelligent grid construction provides strong technical guarantee and support when so just can realize a kind of verification.
Gas density relay of the present utility model can carry out integrated structure design, namely display section and control section (mainly comprising housing 101, pedestal 102, pressure detector 103, temperature compensating element 104, movement 105, pointer 106, dial 107, end seat 108, some signal generators 109 etc.) and verify interface 2, valve 3 can be integrated.Gas density relay of the present utility model can also carry out modularized design, display section and control section can design and become a standalone module, when any module has problem, valve-off can be passed through, just can cut off the gas circuit with equipment connection, just can change separately this module at the scene, ensure system safety operation, greatly save cost.
Gas density relay of the present utility model, it has following beneficial effect:
(1) profile of density monitor of the present utility model is substantially the same with common density monitor, can install in all case, thoroughly overcomes Valve joint volume large, in the problem that a lot of place cannot be installed;
(2) adopt density monitor of the present utility model, just can save and install valve type three-way joint additional, save material greatly, there is the very high value of environmental protection, save cost simultaneously, be beneficial to and apply;
(3) density monitor good seal performance of the present utility model, coefficient of safety is high, and structure is simple, and volume is little.
In sum, the novelty need not dismantling the gas density relay that just can verify of the present utility model is obvious, thus can ensure that sulphur hexafluoride electric switch is when normally running, the air inlet gas circuit making sulphur hexafluoride electric switch all and the air vent hole of gas density relay are in communicating state, such gas density relay just really can monitor the sulfur hexafluoride gas density of sulphur hexafluoride electric switch, if the sulfur hexafluoride gas in sulphur hexafluoride electric switch is once there occurs leakage, gas density relay will send warning or block signal in time, ensure that the safe operation of electrical network.Gas density relay of the present utility model can adapt to use under any field condition varied, and directly changes, and ensures the safe operation of electrical network.
Last it is noted that above each embodiment is only in order to illustrate the technical solution of the utility model, be not intended to limit; Although be described in detail the utility model with reference to foregoing embodiments, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of each embodiment technical scheme of the utility model.
Claims (17)
1. exempt from the gas density relay dismantled when verifying for one kind, comprise: housing, and pedestal, pressure detector, temperature compensating element, movement, pointer, dial, some signal generators and the equipment connection joint be located in described housing, it is characterized in that, also comprise: verification interface and valve;
One end of described valve is connected with described equipment connection joint, and the other end of described valve is connected with described verification interface; Described verification interface is connected with described pressure detector by described pedestal.
2. gas density relay according to claim 1, is characterized in that, described pedestal and described equipment connection joint are structure as a whole.
3. gas density relay according to claim 1, is characterized in that, described signal generator comprises: sensitive switch or magnetic help formula electric contact; Described pressure detector comprises: Baden's pipe or bellows.
4. gas density relay according to claim 1, is characterized in that, described verification interface is provided with closeouts.
5. gas density relay according to claim 4, is characterized in that, is provided with some shutoff seals between described closeouts and described verification interface, and described shutoff seal comprises: rubber ring, rubber blanket or O shape circle.
6. gas density relay according to claim 1, is characterized in that, described valve adopts cut-out cock or check-valves, and described cut-out cock comprises: ball valve, butterfly valve, gate valve, break valve, plug valve, butterfly valve, needle valve or diaphragm valve.
7. gas density relay according to claim 6, is characterized in that, the cut-off spool of described cut-out cock is provided with and blocks seal, described in block seal and comprise: the rubber parts on spool is being blocked in rubber ring, rubber blanket, polytetrafluoroethylene or sulfuration.
8. gas density relay according to claim 1, is characterized in that, described verification interface is arranged on the inside of described housing, side, front or bottom rear.
9. gas density relay according to claim 1, is characterized in that, described verification interface is arranged on described equipment connection joint or electric equipment.
10. gas density relay according to claim 1, is characterized in that, on the inside that described valve is arranged on described housing or side, or described valve is arranged on described equipment connection joint, or described valve is arranged on electric equipment.
11. gas density relays according to claim 1, is characterized in that, described verification interface is provided with Self-sealing valve.
12. gas density relays according to claim 1, is characterized in that, are provided with some seals between the valve rod of described valve and valve body.
13. gas density relays according to claim 1, is characterized in that, the spool of described valve adopts hard encapsulant.
14. gas density relays according to claim 1, is characterized in that, described valve is provided with self-locking connection mechanism.
15. gas density relays according to claim 1, is characterized in that, described valve and described verification interface are structure as a whole.
16. gas density relays according to claim 1, is characterized in that, described valve seal is in cavity.
17. gas density relays according to claim 1-16 any one, it is characterized in that, also comprise: some transducer connectors, described transducer connector is used for connecting: the micro-water sensor of Gas Density Sensor, gas or gas analyte transducer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420610089.9U CN204230151U (en) | 2014-10-21 | 2014-10-21 | A kind of gas density relay of exempting to dismantle when verifying |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420610089.9U CN204230151U (en) | 2014-10-21 | 2014-10-21 | A kind of gas density relay of exempting to dismantle when verifying |
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| Publication Number | Publication Date |
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| CN204230151U true CN204230151U (en) | 2015-03-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420610089.9U Expired - Fee Related CN204230151U (en) | 2014-10-21 | 2014-10-21 | A kind of gas density relay of exempting to dismantle when verifying |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104299843A (en) * | 2014-10-21 | 2015-01-21 | 上海乐研电气科技有限公司 | Gas density relay free of detachment in verification process |
| CN110514996A (en) * | 2019-09-04 | 2019-11-29 | 上海乐研电气有限公司 | A kind of remodeling method of gas density relay |
| CN110514995A (en) * | 2019-09-04 | 2019-11-29 | 上海乐研电气有限公司 | A kind of gas density relay and its method of calibration with online self checking function |
| CN110542854A (en) * | 2019-09-04 | 2019-12-06 | 上海卓电电气有限公司 | Online calibration method of gas density relay |
| CN110542853A (en) * | 2019-09-04 | 2019-12-06 | 上海乐研电气有限公司 | Gas density relay with online self-checking function and checking method thereof |
| CN110542453A (en) * | 2019-09-04 | 2019-12-06 | 上海卓电电气有限公司 | Remote gas density relay and monitoring system |
| WO2021043038A1 (en) * | 2019-09-04 | 2021-03-11 | 上海乐研电气有限公司 | Electrical system with on-line sampling verification function and verification method thereof |
| CN112697341A (en) * | 2020-12-07 | 2021-04-23 | 上海平高天灵开关有限公司 | Inflatable density relay meter |
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2014
- 2014-10-21 CN CN201420610089.9U patent/CN204230151U/en not_active Expired - Fee Related
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104299843A (en) * | 2014-10-21 | 2015-01-21 | 上海乐研电气科技有限公司 | Gas density relay free of detachment in verification process |
| CN110514996A (en) * | 2019-09-04 | 2019-11-29 | 上海乐研电气有限公司 | A kind of remodeling method of gas density relay |
| CN110514995A (en) * | 2019-09-04 | 2019-11-29 | 上海乐研电气有限公司 | A kind of gas density relay and its method of calibration with online self checking function |
| CN110542854A (en) * | 2019-09-04 | 2019-12-06 | 上海卓电电气有限公司 | Online calibration method of gas density relay |
| CN110542853A (en) * | 2019-09-04 | 2019-12-06 | 上海乐研电气有限公司 | Gas density relay with online self-checking function and checking method thereof |
| CN110542453A (en) * | 2019-09-04 | 2019-12-06 | 上海卓电电气有限公司 | Remote gas density relay and monitoring system |
| WO2021043038A1 (en) * | 2019-09-04 | 2021-03-11 | 上海乐研电气有限公司 | Electrical system with on-line sampling verification function and verification method thereof |
| CN110514996B (en) * | 2019-09-04 | 2022-10-14 | 上海乐研电气有限公司 | Transformation method of gas density relay |
| US12046433B2 (en) | 2019-09-04 | 2024-07-23 | Shanghai Roye Electric Co., Ltd. | Electrical system with on-line sampling verification function and verification method thereof |
| CN110514995B (en) * | 2019-09-04 | 2024-08-06 | 上海乐研电气有限公司 | Gas density relay with online self-checking function and checking method thereof |
| CN110542853B (en) * | 2019-09-04 | 2024-08-06 | 上海乐研电气有限公司 | Gas density relay with online self-checking function and checking method thereof |
| CN112697341A (en) * | 2020-12-07 | 2021-04-23 | 上海平高天灵开关有限公司 | Inflatable density relay meter |
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Effective date of registration: 20170103 Address after: 201802 Shanghai City, Jiading District Nanxiang Town, North Road No. 21, Lane 1755 mares tail four layer B Patentee after: Shanghai joy Electric Co., Ltd. Address before: Qingpu District of Shanghai city Shen brick road building 201802 new No. 221 Building 1 B zone 1 room 123 Patentee before: Shanghai Roye Electronic Science & Technology Co., Ltd. |
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Granted publication date: 20150325 Termination date: 20171021 |