CN2531383Y - Intelligent type gas density monitoring and controlling apparatus - Google Patents
Intelligent type gas density monitoring and controlling apparatus Download PDFInfo
- Publication number
- CN2531383Y CN2531383Y CN 01240517 CN01240517U CN2531383Y CN 2531383 Y CN2531383 Y CN 2531383Y CN 01240517 CN01240517 CN 01240517 CN 01240517 U CN01240517 U CN 01240517U CN 2531383 Y CN2531383 Y CN 2531383Y
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- gas density
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Abstract
The utility model relates to an intelligent type gas density monitoring and controlling apparatus under the condition of constant volume, which is used for various air storing devices of various SF6 high voltage electric apparatus and the natural gas and the chemical industries of the electric net transforming and transmitting station. The utility model is composed of an intelligent digital display control meter and a gas density transducer, wherein a silicon pressure resistance sensor chip in the gas density transducer is fixed to a pressure interface by nuts, and a temperature sensitivity compensating component and a V/I converting circuit board are fixed in a casing and connected with a Wheatstone bridge on a sensor chip by a conducting wire. The casing and the pressure interface are fixed into a whole, and a connector assembly is fixed to the casing and is connected with the intelligent digital display control meter by a shielding cable. The utility model is used for replacing the present using mechanical density relay and can largely enhance the automation level of gas density monitoring and controlling.
Description
The utility model relate to a kind of can be under waiting appearance condition the intelligent gas density Monitoring and Controlling instrument of the corresponding normal pressure value of observing and controlling (20 ℃ time gas pressure value) with gas density, be mainly used in all kinds of SF6 high voltage electric equipments in electrical network power transmission and transformation station, rock gas and all kinds of accumulator units of chemical industry in the monitoring and the control that wait under the appearance condition gas density.
Because SF6 gas has the good insulation performance arc extinction performance, therefore China adopts all kinds of SF6 high voltage electric equipments in middle and high pressure power transmission and transformation at different levels station in a large number at present, and the density of SF6 gas all adopts the observing and controlling of mechanical type density monitor basically as the important indicator that guarantees equipment safety operation in the equipment.The mechanical type density monitor has in-site modeling demonstration and the corresponding normal pressure value of gas density, and alerting signal is sent in this pressure decline that is caused by leakage.Owing to can only obtain alerting signal in the pulpit, can't monitor in real time normal pressure value corresponding in the on-the-spot operational outfit with gas density, more the computing machine that can't realize the individual device running status is monitored automatically, also is unfavorable for the interruption maintenance tonifying Qi cycle of rationally arranging each every equipment of transformer station in the whole electrical network.
Goal of the invention of the present utility model is can not can provide a kind of reliability height, adaptive capacity to environment strong for the standard electric signal of concentrating monitoring in real time or computer networking remote auto necessary for monitoring or digital signal with converting to the corresponding normal pressure value of gas density in the checked object at the mechanical type density monitor of present use, standard output can with the intelligent gas density Monitoring and Controlling instrument of various robot control system(RCS) compatibilities.
Goal of the invention of the present utility model can be achieved by the following technical solutions: it mainly is made up of the gas density transmitter and the pulpit purpose intelligent digital controller at scene, joins by signal-transmitting cable between the two.The gas density transmitter can will be corresponding under the arbitrary temp condition in specialized range with gas density normal pressure value (promptly 20 ℃ time gas pressure value) convert the normalized current signal of 4～20mA to.The intelligent digital controller can finish also that multidigit is reported to the police and control except that above-mentioned normal pressure value can being shown by digital form, and joins with system computer by RS232 or RS485 communication interface, realizes that remote auto monitors.Specifically, it comprises whole intelligent digital controller 8 and gas density transmitter two parts.Have RS232 or RS485 interface on the intelligent digital controller 8, can with the control system computer networking, realize remote auto control.The gas density transmitter is made of pressure interface 1, silicon piezoresistance sensitivity chip 2, nut 3, temperature-sensing element (device) compensation and V/I change-over circuit plate 4, housing 5, edge connector assembly 6 and shielded cable 7.Silicon piezoresistance sensitivity chip (OEM) 2 is fixed on the pressure interface 1 by nut 3; Temperature-sensing element (device) compensation and V/I change-over circuit plate 4 are fixed in the housing 5, and join by the Wheatstone bridge in lead on it and the sensitive chip 2; Housing 5 fixedly fuses by mechanical clinching and chemical bonding mode and pressure interface 1; Edge connector assembly 6 is fixed on outside the housing 5, and the outer end of plug joins by shielded cable 7 and intelligent digital controller 8, and its inner is connected with temperature-sensing element (device) compensation and V/I change-over circuit 4 by lead.
The utility model with the advantage that background technology-the mechanical type density monitor is compared is: measured parameter shows that by the on-the-spot mechanical type simulation that disperses becoming the pulpit concentrates digital display, the monitor staff need not to be in the action, and can finish the real-time monitoring and the control of on-the-spot all devices in the pulpit.The utility model also can convert measured parameter to standard analog and the digital signal that can join with the control system computing machine in addition, makes main application fields-electricity grid substation SF6 high voltage electric equipment running state monitoring carry out the remote auto management fully.
Accompanying drawing and explanation:
Fig. 1 is an one-piece construction synoptic diagram of the present utility model;
Fig. 2 is a gas density transmitter circuit schematic diagram of the present utility model;
Fig. 3 is the utility model design concept schematic block diagram;
Wherein:
1-pressure interface 2-silicon piezoresistance sensitivity chip 3-nut
Compensation of 4-temperature-sensing element (device) and V/I change-over circuit 5-housing
6-edge connector assembly 7-shielded cable 8-intelligent digital controller
Embodiment: this instructions the 5th part and in conjunction with the accompanying drawings 1-3 provided full implementation example of the present utility model, so here no longer the repetition.During use transmitter is installed on the field apparatus, in specialized range under the arbitrary temp condition, can with equipment in the corresponding normal pressure value of gas density convert 4～20mA normalized current signal to, the intelligent digital controller that is sent to the pulpit by shielded cable shows and controls.Instrument has RS232 or RS485 interface, can with the control system computer networking, realize the remote auto monitoring.When gas produce to leak and when causing dropping to different settings with the corresponding normal pressure value of its density, instrument can be sent many group switch alerting signals accurately and reliably, and each group alarm parameter can be by the secondary demonstration monitoring of instrument, set as requested and revise, and having a password locking, outage such as does not lose at characteristics.In addition, when there are multiple devices in the scene, can adopt intelligent multichannel to patrol and examine digital display controller each is implemented to patrol and examine observing and controlling by the gas density transmitter on the observing and controlling object.
As Fig. 2, the gas density transmitter circuit is made up of V/I change-over circuit (commercially available integrated circuit block), Wheatstone bridge and temperature-sensing element (device) compensating circuit three parts.In the pressure-temperature characterisitic that waits under the appearance condition,, just can realize that various gas with various (containing non-ideal gas) are in the density observing and controlling that waits under the appearance condition according to tested gas as long as suitably adjust the design parameter of instrument temperature-compensation circuit.Therefore instrument not only can be used for the observing and controlling of SF6 gas density in all kinds of high voltage electric equipments in power transmission and transformation station, but also can realize the metering to gaseous mass by the detection to all gases density in the accumulator unit.Specifically, as Fig. 1, the pressure of tested gas puts on the silicon piezoresistance sensitivity chip 2 by pressure interface 1, make Wheatstone bridge output that originally is in equilibrium state in the chip and the electric signal that is directly proportional by measuring pressure, deliver to temperature-sensing element (device) compensation and V/I change-over circuit 4 by lead, whether the temperature-sensing element (device) in the circuit 4 will depart from 20 ℃ of standard temperatures and deviation value size according to temperature detection value determines whether electric bridge is compensated and compensates what, and the voltage signal that will compensate amplification converts the normalized current signal to and passes through edge connector assembly 6 and export.The thermal capacity of temperature-sensing element (device) and the selection of temperature-sensitive point make it can fully in time experience the temperature and the variation thereof of tested gas, be not subjected to the interference of artificial or accidentalia again, the appropriate design of circuit parameter makes its compensation follow pressure-temperature characterisitic under the appearance condition such as tested gas fully.The normalized current signal of density transmitter output is transferred to intelligent digital controller 8 in the pulpit by shielded cable 7, to showing with the corresponding normal pressure value of tested gas density and control, and outputting standard simulating signal and digital signal are sent to computing machine and carry out the remote auto monitoring by it.
Claims (1)
1, a kind of intelligent gas density Monitoring and Controlling instrument comprises whole intelligent digital controller part (8); It is characterized in that: also have the gas density transmitter, this gas density transmitter is made of pressure interface (1), silicon piezoresistance sensitivity chip (2), nut (3), temperature-sensing element (device) compensation and V/I change-over circuit plate (4), housing (5), edge connector assembly (6) and shielded cable (7); Silicon piezoresistance sensitivity chip (OEM) (2) is fixed on the pressure interface (1) by nut (3); Temperature-sensing element (device) compensation and V/I change-over circuit plate (4) are fixed in the housing (5), and join by the Wheatstone bridge in lead on it and the sensitive chip (2); Housing (5) fixedly fuses by machinery and chemical mode and pressure interface (1); Edge connector assembly (6) is fixed on outside the housing (5), and the outer end of plug joins by shielded cable (7) and intelligent digital controller (8), and the inner is connected with temperature-sensing element (device) compensation and V/I change-over circuit (4) by lead.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01240517 CN2531383Y (en) | 2001-06-14 | 2001-06-14 | Intelligent type gas density monitoring and controlling apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01240517 CN2531383Y (en) | 2001-06-14 | 2001-06-14 | Intelligent type gas density monitoring and controlling apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2531383Y true CN2531383Y (en) | 2003-01-15 |
Family
ID=33652728
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01240517 Expired - Lifetime CN2531383Y (en) | 2001-06-14 | 2001-06-14 | Intelligent type gas density monitoring and controlling apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2531383Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102318025B (en) * | 2009-01-30 | 2015-11-25 | 威卡亚历山大威甘德股份有限公司 | For determining the SF insulated in room or switch cubicle 6the measuring equipment of the loading of gas and corresponding method |
-
2001
- 2001-06-14 CN CN 01240517 patent/CN2531383Y/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102318025B (en) * | 2009-01-30 | 2015-11-25 | 威卡亚历山大威甘德股份有限公司 | For determining the SF insulated in room or switch cubicle 6the measuring equipment of the loading of gas and corresponding method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20110614 Granted publication date: 20030115 |