Summary of the invention
The present invention provides a kind of wide range sulfur hexafluoride gas density relay, for solving prior artThe range indication range of sulfur hexafluoride gas density relay is little, it is difficult to realize that gamut scope shows asksTopic.
The wide range sulfur hexafluoride gas density relay that the present invention provides, including: the letter linked togetherNumber mechanism and indicating value indication mechanism；
The bellows of gas density and conduct in detection sulfur hexafluoride electrical equipment it is provided with in described signaling gearThe microswitch of contact；
Described indicating value indication mechanism includes: display Baden pipe, displays temperature compensating element, display end seat,Movement, dial, pointer and display base；One end of described display Baden pipe and described displays temperature are mendedThe one end repaying element is both secured to described display end seat, and the other end of described display Baden pipe is connected to describedOn display base, the other end of described displays temperature compensating element, passes sequentially through display linking arm and display connectsBar is connected with described movement or the other end of described displays temperature compensating element, directly connects with described movementConnect, before described pointer is installed on described movement and is located at described dial.
Further, described displays temperature compensating element, includes: bimetal leaf constitute compensating device or fillThere is the compensating device compensating gas.
Further, described signaling gear also includes: seals cavity, Signal Regulation mechanism and outlet and connects seat；
Described bellows is located in described annular seal space body；Described Signal Regulation mechanism and described microswitch pairShould arrange, the holding wire of described microswitch is connected to described outlet and connects seat；
Wherein, the first end of described bellows seal, the second end of described bellows electric with sulfur hexafluorideEquipment is connected and described annular seal space is filled with compensation gas, or, the first end of described bellows andSecond end all seals, described sealing cavity is connected with sulfur hexafluoride electrical equipment and fills in described bellowsThere is compensation gas.
Further, described signaling gear also includes: spring and spring fixed seat；
One end of described spring is connected to the position that described Signal Regulation mechanism is connected with described bellowsPlace, the other end of described spring is connected to described spring fixed seat；Described spring fixed seat is fixedly installed inBetween described bellows and described microswitch.
Further, one end that described Signal Regulation mechanism is connected with described bellows extends to described rippleThe inside of pipe.
Further, the other end of described spring is connected to described spring fixed seat by spring adjustment mechanism.
Further, described Signal Regulation mechanism is provided with regulation screw.
Further, described outlet connection seat is installed transition piece by junction block and is fixedly installed in described annular seal spaceOn body, or, described outlet connects seat and is directly fixedly installed on described sealing cavity.
Further, described annular seal space external body is enclosed with heat-insulation layer.
Further, the wide range sulfur hexafluoride gas density relay of the present invention also includes: be located at described closeThe housing of envelope containment portion, is provided with anti-vibration pad between described sealing cavity and described housing.
The wide range sulfur hexafluoride gas density relay that the present invention provides, indicating value indication mechanism (display partPoint) load cell use Baden pipe, be different from prior art show part load cell use rippleLine pipe, overcomes that bellows displacement is little, is difficult to gamut display problem, can be real easilyGamut scope (-the 0.1～0.9MPa) display of existing gas density relay, is particularly very easy to realizeIt is initiated with the display of-0.1MPa, when vacuumizing, just can show vacuum, be very easy to popularization and application.AndThe load cell that its signaling gear (signal control portion) is used simultaneously is bellows, ensures densityThe high resistance to shock of relay, and the contact used is microswitch, ensures the reliable of density monitorElectric property.
Detailed description of the invention:
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with thisAccompanying drawing in bright embodiment, is clearly and completely described the technical scheme in the embodiment of the present invention,Obviously, described embodiment is a part of embodiment of the present invention rather than whole embodiments.Based onEmbodiment in the present invention, those of ordinary skill in the art are obtained under not making creative work premiseThe every other embodiment obtained, broadly falls into the scope of protection of the invention.
Fig. 1 is that the part section of the wide range sulfur hexafluoride gas density relay of the embodiment of the present invention one showsIt is intended to, as it is shown in figure 1, the wide range sulfur hexafluoride gas density relay of the embodiment of the present invention one includes:The signaling gear linked together and indicating value indication mechanism.Detection sulfur hexafluoride it is provided with in described signaling gearIn electrical equipment gas density bellows and as some microswitches of contact.
Described indicating value indication mechanism includes: display Baden pipe 71, displays temperature compensating element, 72, display endSeat 73, movement 74, dial 75, pointer 76 and display base 77；One end of described display Baden pipe 71It is both secured to described display end seat 73, described display Baden with one end of described displays temperature compensating element, 72The other end of pipe 71 is connected on described display base 77, the other end of described displays temperature compensating element, 72Pass sequentially through display linking arm and display connecting rod is connected with described movement 74 or described displays temperature compensates unitThe other end of part 72 is directly connected with described movement 74, and described pointer 76 is installed on described movement 74 and setsBefore described dial 75, it is achieved sulfur hexafluoride density indicating value display function.Wherein, display base 77It is connected with sulfur hexafluoride electrical equipment, makes lithium based in sulfur hexafluoride electrical equipment of Baden's pipe 71The pressure of sulphur gas and there is mechanical deformation, drive movement to work by this mechanical deformation.The present invention implementsThe wide range sulfur hexafluoride gas density relay of example one uses display Baden pipe to substitute ripple of the prior artLine pipe as the critical component of indicating value indication mechanism, can realize easily gamut scope (-0.1～0.9MPa) display, is particularly very easy to the display realizing being initiated with-0.1MPa, the most permissible when vacuumizingDisplay vacuum, is very easy to popularization and application.And its signaling gear (signal control portion) is adopted simultaneouslyLoad cell be bellows, ensure the high resistance to shock of density monitor, and the contact used beMicroswitch, ensures the reliable electric property of density monitor.Described displays temperature compensating element, 72Compensating device that bimetal leaf constitutes or employing can be used to be filled with the compensating device compensating gas.
Described signaling gear specifically includes: seal cavity 2, bellows 1, several microswitch 3, signalsGovernor motion 4 and outlet connect seat 5.Described bellows 1 is located in described sealing cavity 2；Described signal is adjustedJoint mechanism 4 is correspondingly arranged with described microswitch 3, and the holding wire of described microswitch 3 is connected to described outletConnect seat 5.First end of described bellows 1 connects described Signal Regulation mechanism 4.
Wherein, the second end and the sulfur hexafluoride electricity of the first end sealing of described bellows 1, described bellows 1Gas equipment is connected and is filled with compensation gas in described sealing cavity 2.In addition it is also possible to be set to described rippleFirst end and second end of pipe all seal, described sealing cavity is connected with sulfur hexafluoride electrical equipment and instituteCompensation gas it is filled with in stating bellows.Described microswitch 3 and described Signal Regulation mechanism 4 can be located at instituteState in sealing cavity 2, or, described microswitch and described Signal Regulation mechanism can also be located at described closeEnvelope cavity 2 is outside.Described Signal Regulation mechanism 4 be also provided with regulate screw 41, regulation screw 41 in order toThe regulation warning of density monitor, locking contact working value.Described outlet connects seat 5 and described sealing cavitySeal between 2 and arrange.Described outlet connects seat 5 and can be fixedly installed in described by junction block installation transition pieceSeal on cavity 2, or, described outlet connects seat 5 can also directly be fixedly installed in described sealing cavity 2On.The holding wire of described microswitch 3 can also be connected with the signal is far passed circuit, close to realize sulfur hexafluorideThe on-line monitoring of degree.Sealing cavity 2 can be made up of metal material (being such as welded), outlet connectsSeat 5 is made up of metal, glass and some lead-out wires.
The operation principle of the wide range sulfur hexafluoride gas density relay of the embodiment of the present invention one is: regulationWell after regulation screw 41, seal cavity 2, typically realized by welding, then sealing cavity 2 is taken outApplication of vacuum, the parameter then according to wide range sulfur hexafluoride gas density relay is filled in sealing cavity 2Enter the compensation gas of relevant pressure.If SF6 (sulfur hexafluoride) electrical equipment does not leak gas, wide range sixSulfur fluoride gas density relay does not the most send warning block signal；If SF6 electrical equipment leaks gas, whenWhen SF6 gas density in SF6 electrical equipment is near or below the density compensating gas sealing in cavity 2,Wide range sulfur hexafluoride gas density relay is issued by warning block signal, it is ensured that power grid security.
Fig. 2 is that the part section of the wide range sulfur hexafluoride gas density relay of the embodiment of the present invention two showsIt is intended to, as in figure 2 it is shown, the wide range sulfur hexafluoride gas density relay of the embodiment of the present invention two includes:Seal cavity 2, bellows 1, several microswitches 3, Signal Regulation mechanism 4, spring 61, spring solidReservation 62 and outlet connect seat 5.Compensation gas it is filled with in described sealing cavity 2, described bellows 1, describedMicroswitch 3 and described Signal Regulation mechanism 4 are located in described sealing cavity 2；Described Signal Regulation mechanism 4Being correspondingly arranged with described microswitch 3, the holding wire of described microswitch 3 connects seat 5 by described outlet and drawsGoing out, described outlet connects sealing between seat 5 and described sealing cavity 2 and arranges；One end (of described bellows 1One end) it is to seal and connect described Signal Regulation mechanism 4, the other end (the second end) of described bellows 1It is connected with sulfur hexafluoride electrical equipment by jointing 91, in described sealing cavity 2, is filled with compensation gasBody.One end of described spring 61 is connected to the position that described Signal Regulation mechanism 4 is connected with described bellows 1Putting place, the other end of described spring 61 is fixedly connected on described spring fixed seat by spring adjustment mechanism 6362；Described spring fixed seat 62 is fixedly installed between described bellows 1 and described microswitch 3.DescribedSignal Regulation mechanism 4 is also provided with regulating screw 41, and regulation screw 41 is in order to regulate the report of density monitorAlert, locking contact working value.The holding wire of described microswitch 3 can also connect the signal is far passed circuit, withRealize the on-line monitoring of sulfur hexafluoride density.
The wide range sulfur hexafluoride gas density relay of the embodiment of the present invention two can also include: housing 81,It is wrapped in heat-insulation layer 82, outlet Ge Lan 92, the keeper (or guide) 93 sealed outside cavity 2 and connectsLine seat 94.82 insulation effects of heat-insulation layer, can be effectively prevented from environment temperature and change suddenly caused mistakeReport to the police.
The operation principle of the wide range sulfur hexafluoride gas density relay of the embodiment of the present invention two is: ripplePipe 1 is mainly as gas pressure transfer device, by using the combination of bellows 1 and spring 61 to realize spring61 are used as the main measuring cell of pressure, improve measuring accuracy further.If SF6 electrical equipment does not leakGas, wide range sulfur hexafluoride gas density relay does not the most send warning block signal；If SF6 electrically setsStandby gas leakage, when the SF6 gas density in SF6 electrical equipment is near or below the compensation gas sealed in cavity 2During the density of body, wide range sulfur hexafluoride gas density relay is issued by warning block signal, it is ensured that electricityNet safety.
The wide range sulfur hexafluoride gas density relay of the embodiment of the present invention two also includes: be located at described closeThe indicating value indication mechanism being independently arranged of envelope cavity wall.Described indicating value indication mechanism includes: display BadenPipe 71, displays temperature compensating element, 72, display end seat 73, movement 74, dial 75, pointer 76 and aobviousShow pedestal 77.Display base 77 is connected with sulfur hexafluoride electrical equipment.The one of described display Baden pipe 71One end of end and described displays temperature compensating element, 72 is both secured to described display end seat 73, described display barThe other end stepping on pipe 71 is connected on described display base 77, another of described displays temperature compensating element, 72Hold by showing that connecting rod is connected with described movement 74 or the other end of described displays temperature compensating element, 72 is straightConnecing and be connected with described movement 74, described pointer 76 is installed on described movement 74 and is located at described dial 75Before, to realize density indicating value display function.The wide range sulfur hexafluoride gas of the embodiment of the present invention two is closeDegree relay can realize gamut scope (-0.1～0.9MPa) display easily, the most veryEasily realize being initiated with the display of-0.1MPa, when vacuumizing, just can show vacuum, be very easy to promoteApplication.
Fig. 3 is that the part section of the wide range sulfur hexafluoride gas density relay of the embodiment of the present invention three showsIt is intended to, as it is shown on figure 3, the wide range sulfur hexafluoride gas density relay of the embodiment of the present invention three includes:Seal cavity 2, bellows 1, several microswitches 3, Signal Regulation mechanism 4, spring 61, spring solidReservation 62 and outlet connect seat 5.First end and second end of described bellows 1 all seal, specifically, and rippleFirst end of line pipe 1 is to seal and connect Signal Regulation mechanism 4 and spring 33, and the second end of bellows 1 is closeEnvelope (such as, seal welding) is sealing the inwall of cavity 2, and described sealing cavity 2 is by jointing 91It is connected with sulfur hexafluoride electrical equipment, in described bellows 1, is filled with compensation gas.
One end that described Signal Regulation mechanism 4 is connected with described bellows 1 extends to described bellows 1Internal.One end of described spring 61 is connected to what described Signal Regulation mechanism 4 was connected with described bellows 1Position, the other end of described spring 61 is fixedly connected on described spring by spring adjustment mechanism 63 and fixesSeat 62；Described spring fixed seat 62 is fixedly installed between described bellows 1 and described microswitch 3.
The wide range sulfur hexafluoride gas density relay of the embodiment of the present invention three can also include: housing 81,It is wrapped in sealing heat-insulation layer 82, outlet Ge Lan 92, keeper (or guide) 93 outside cavity 2, connectsThe indicating value indication mechanism of line seat 94 and relatively independent setting.Described indicating value indication mechanism includes: display barStep on pipe 71, displays temperature compensating element, 72, display end seat 73, movement 74, dial 75, pointer 76 andDisplay base 77.Display base 77 is connected with sulfur hexafluoride electrical equipment.Described display Baden pipe 71One end of one end and described displays temperature compensating element, 72 is both secured to described display end seat 73, described displayThe other end of Baden's pipe 71 is connected on described display base 77, described displays temperature compensating element, 72 anotherOne end passes sequentially through display linking arm and display connecting rod is connected with described movement 74 or described displays temperature is mendedThe other end repaying element 72 is directly connected with described movement 74, and described pointer 76 is installed on described movement 74And before being located at described dial 75, it is achieved density indicating value display function.
The operation principle of the wide range sulfur hexafluoride gas density relay of the embodiment of the present invention three is: ripplePipe 1 is mainly as gas pressure transfer device, by using the combination of bellows 1 and spring 61 to realize spring61 are used as the main measuring cell of pressure, improve measuring accuracy further.If SF6 electrical equipment does not leakGas, wide range sulfur hexafluoride gas density relay does not the most send warning block signal；If SF6 electrically setsStandby gas leakage, when the SF6 gas density in SF6 electrical equipment is near or below the compensation gas sealed in cavity 2During the density of body, seal the both sides of the bellows 1 that the two ends in cavity 2 are sealed all by SF6 electrical equipmentThe pressure effect of interior SF6 gas, wide range sulfur hexafluoride gas density relay is issued by warning locking letterNumber, it is ensured that power grid security.
Fig. 4 is that the part section of the wide range sulfur hexafluoride gas density relay of the embodiment of the present invention four showsBeing intended to, as shown in Figure 4, the wide range sulfur hexafluoride gas density relay of the embodiment of the present invention four includes:Seal cavity 2, bellows 1, several microswitches 3, Signal Regulation mechanism 4 and outlet and connect seat 5.InstituteState the first end of bellows 1 and the second end all seals and the inside of bellows 1 is filled with compensation gas, described closeEnvelope cavity 2 is connected with sulfur hexafluoride electrical equipment by jointing 91.The embodiment of the present invention four a large amount ofJourney sulfur hexafluoride gas density relay also includes: housing 81, is wrapped in and seals heat-insulation layer outside cavity 282, outlet Ge Lan 92, keeper (or guide) 93, junction block 94 and the indicating value that is independently arranged showShow mechanism.Described indicating value indication mechanism includes: shows Baden's pipe 71, displays temperature compensating element, 72, showShow end seat 73, movement 74, dial 75, pointer 76 and display base 77.Display base 77 is with lithiumSulphur electrical equipment is connected.One end of described display Baden pipe 71 and described displays temperature compensating element, 72One end is both secured to described display end seat 73, and the other end of described display Baden pipe 71 is connected to described displayOn pedestal 77, the other end of described displays temperature compensating element, 72 passes sequentially through display linking arm and display connectsBar be connected with described movement 74 or described displays temperature compensating element, 72 the other end directly with described movement74 connect, before described pointer 76 is installed on described movement 74 and is located at described dial 75, it is achieved closeDegree indicating value display function.Its operation principle is as follows: if SF6 electrical equipment does not leak gas, density monitorThe most do not send warning block signal；And if the gas leakage of SF6 electrical equipment, the SF6 in SF6 electrical equipmentDuring the density compensating gas that gas density is near or below in bellows 1, density monitor is issued by reporting to the policeBlock signal, it is ensured that power grid security.The outside sealing cavity 2 is wrapped with heat preservation member 82, plays insulation effect, energyIt is effectively prevented from environment temperature and changes suddenly caused false alarm.
Fig. 5 is that the part section of the wide range sulfur hexafluoride gas density relay of the embodiment of the present invention five showsIt is intended to, as it is shown in figure 5, the wide range sulfur hexafluoride gas density relay of the embodiment of the present invention five includes:Seal cavity 2, bellows 1, several microswitches 3, Signal Regulation mechanism 4 and outlet to connect seat 5, setIn seal the outside housing 81 of cavity 2, be wrapped in the heat-insulation layer 82 outside sealing cavity 2, outlet Ge Lan 92,Keeper (or guide) 93, junction block 94 and the indicating value indication mechanism being independently arranged.Housing 81 is adoptedWith general conventional densities relay or manometric housing.Described indicating value indication mechanism includes: display BadenPipe 71, displays temperature compensating element, 72, display end seat 73, movement 74, dial 75, pointer 76 and aobviousShow pedestal 77.Display base 77 is connected with sulfur hexafluoride electrical equipment.The one of described display Baden pipe 71One end of end and described displays temperature compensating element, 72 is both secured to described display end seat 73, described display barThe other end stepping on pipe 71 is connected on described display base 77, another of described displays temperature compensating element, 72End passes sequentially through display linking arm and display connecting rod is connected with described movement 74 or described displays temperature compensatesThe other end of element 72 is directly connected with described movement 74, described pointer 76 be installed on described movement 74 andBefore being located at described dial 75, it is achieved density indicating value display function.
Fig. 6 is that the part section of the wide range sulfur hexafluoride gas density relay of the embodiment of the present invention six showsBeing intended to, as shown in Figure 6, the wide range sulfur hexafluoride gas density relay of the embodiment of the present invention six includes:Seal cavity 2, bellows 1, several microswitches 3, Signal Regulation mechanism 4, outlet connection seat 5, setIn seal the outside housing 81 of cavity 2, be wrapped in the heat-insulation layer 82 outside sealing cavity 2, outlet Ge Lan 92,Keeper (or guide) 93, junction block 94 and the indicating value indication mechanism being independently arranged.Housing 81 is adoptedWith general conventional densities relay or manometric housing as its shell, and jointing 91 is radiallyMode, jointing 91 connects with the second end of bellows 1 by connecting tracheae 95, the of bellows 1One end seals, and jointing 91 connects sulfur hexafluoride electrical equipment, is filled with compensation gas in sealing cavity 2.Described indicating value indication mechanism includes: display Baden pipe 71, displays temperature compensating element, 72, display end seat 73,Movement 74, dial 75, pointer 76 and display base 77.Display base 77 and sulfur hexafluoride electrical equipmentIt is connected.One end of described display Baden pipe 71 and one end of described displays temperature compensating element, 72 are the most fixingIn described display end seat 73, the other end of described display Baden pipe 71 is connected on described display base 77,The other end of described displays temperature compensating element, 72 passes sequentially through display linking arm and display connecting rod and described machineCore 74 connects or the other end of described displays temperature compensating element, 72 is directly connected with described movement 74, instituteState before pointer 76 is installed on described movement 74 and is located at described dial 75, it is achieved density indicating value showsFunction.
Fig. 7 is that the part section of the wide range sulfur hexafluoride gas density relay of the embodiment of the present invention seven showsIt is intended to, as it is shown in fig. 7, the wide range sulfur hexafluoride gas density relay of the embodiment of the present invention seven includes:Seal cavity 2, bellows 1, several microswitches 3, Signal Regulation mechanism 4, outlet connection seat 5, setIn the housing 81 outside described sealing cavity 2, it is located at keeping away between described sealing cavity 2 and described housing 81Shake pad 96 and indicating value indication mechanism, and anti-vibration pad 96 can improve shock resistance further.Housing 81 usesGeneral conventional densities relay or manometric housing are radial manner as its shell, jointing 91,Jointing 91 connects with the second end of bellows 1 by connecting tracheae 95, and the first end of bellows 1 seals,Jointing 91 connects sulfur hexafluoride electrical equipment, is filled with compensation gas in sealing cavity 2.Indicating value display machineStructure includes: display Baden pipe 71, displays temperature compensating element, 72, display end seat 73, movement 74, scaleDish 75, pointer 76 and display base 77.Display base 77 is connected with sulfur hexafluoride electrical equipment.DescribedOne end of display Baden pipe 71 and one end of described displays temperature compensating element, 72 are both secured to described display endSeat 73, the other end of described display Baden pipe 71 is connected on described display base 77, described displays temperatureThe other end of compensating element, 72 pass sequentially through display linking arm and display connecting rod be connected with described movement 74 orThe other end of described displays temperature compensating element, 72 is directly connected with described movement 74, and described pointer 76 is installedOn described movement 74 and before being located at described dial 75, it is achieved density indicating value display function.
The wide range sulfur hexafluoride gas density relay of the embodiment of the present invention eight includes: seal cavity, twoIndividual bellows, several microswitches, Signal Regulation mechanism, outlet connect seat and indicating value display machineStructure.Two bellowss are respectively the first bellows and the second bellows.Sealing cavity is located at by second bellowsIn, and microswitch and Signal Regulation mechanism to be located at annular seal space external；Signal Regulation mechanism and microswitchBeing correspondingly arranged, the holding wire of microswitch is connected to outlet and connects seat；Second end of the first bellows sealsConnecting the first end of the second bellows, Signal Regulation mechanism is connected to the first bellows and the second bellowsJunction.Wherein, the first end of described second bellows seal, the second end of described second bellows withSulfur hexafluoride electrical equipment is connected and described annular seal space is filled with compensation gas, or, described secondFirst end and second end of bellows all seal, described sealing cavity is connected with sulfur hexafluoride electrical equipmentAnd it is filled with compensation gas in described bellows.Indicating value indication mechanism includes: display Baden pipe, displays temperatureCompensating element, display end seat, movement, dial, pointer and display base.Described display Baden pipeOne end of one end and described displays temperature compensating element, is both secured to described display end seat, described display BadenThe other end of pipe is connected on described display base, and the other end of described displays temperature compensating element, leads to successivelyCross display linking arm and display connecting rod is connected with described movement or another of described displays temperature compensating element,End is directly connected with described movement, before described pointer is installed on described movement and is located at described dial,Realize density indicating value display function, so, the density of gamut scope can be realized easilyRelay (-0.1～0.9MPa).
Fig. 8 is that the part section of the wide range sulfur hexafluoride gas density relay of the embodiment of the present invention nine showsBeing intended to, as shown in Figure 8, the wide range sulfur hexafluoride gas density relay of the embodiment of the present invention nine includes:Seal cavity 2, bellows 1, several microswitches 3, Signal Regulation mechanism 4, outlet connection seat 5, setIn the housing 81 outside described sealing cavity 2, spring 61, spring fixed seat 62 and indicating value indication mechanism.Indicating value indication mechanism includes: display Baden pipe 71, temperature compensating element 72, display end seat 73, movement 74,Dial 75, pointer 76 and pedestal 77.One end (the first end) of described bellows 1 is to seal and connectDescribed Signal Regulation mechanism 4, the other end (the second end) of described bellows 1 passes through jointing 91 and sixSulfur fluoride electrical equipment is connected.One end that described Signal Regulation mechanism 4 is connected with described bellows 1 is prolongedExtend the inside of described bellows 1.One end of described spring 61 is connected to described Signal Regulation mechanism 4 and instituteStating the position that bellows 1 is connected, the other end of described spring 61 is fixing even by spring adjustment mechanism 63It is connected to described spring fixed seat 62；It is micro-with described that described spring fixed seat 62 is fixedly installed in described bellows 1Between dynamic switch 3.
The wide range sulfur hexafluoride gas density relay of the present invention, signaling gear uses bellows, it is ensured thatAnti-seismic performance is good；Indicating value indication mechanism uses Baden's pipe, owing to using Baden's pipe to realize, overcomes bellowsDisplacement is little, be difficult to gamut display problem, can realize the density of gamut scope easilyRelay (-0.1～0.9MPa), is particularly very easy to the display realizing being initiated with-0.1MPa, vacuumizesTime just can show vacuum, be very easy to popularization and application.Additionally additionally use displays temperature compensating element,Realize the temperature compensation function of indicating value display part, improve and ensure that precision.In a word, the present inventionWide range sulfur hexafluoride gas density relay has oil-free, resistance to shock is the best, precision is high, electrical resistanceCan good, long working life, the advantage of gamut indication range.Simultaneously because described microswitch can setIn described annular seal space body, and there is sulfur hexafluoride gas in annular seal space body, because sulfur hexafluoride gas has veryStrong insulation and arc extinguishing ability, so the electric terminal of the technology of the present invention density monitor has extraordinaryElectric property, uses reliable, and contacts is reliable, and the life-span is long, and this is also the biggest innovative point of the present inventionAnd feature.
Last it is noted that various embodiments above is only in order to illustrate technical scheme, rather than rightIt limits；Although the present invention being described in detail with reference to foregoing embodiments, this area commonSkilled artisans appreciate that the technical scheme described in foregoing embodiments still can be modified by it,Or the most some or all of technical characteristic is carried out equivalent；And these amendments or replacement, andThe essence not making appropriate technical solution departs from the scope of various embodiments of the present invention technical scheme.