CN103715010B - A kind of sulfur hexafluoride gas density relay - Google Patents
A kind of sulfur hexafluoride gas density relay Download PDFInfo
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- CN103715010B CN103715010B CN201410018847.2A CN201410018847A CN103715010B CN 103715010 B CN103715010 B CN 103715010B CN 201410018847 A CN201410018847 A CN 201410018847A CN 103715010 B CN103715010 B CN 103715010B
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- 229910018503 SF6 Inorganic materials 0.000 title claims abstract description 56
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 229960000909 sulfur hexafluoride Drugs 0.000 title claims abstract description 56
- 230000001105 regulatory effect Effects 0.000 claims abstract description 5
- 230000007246 mechanism Effects 0.000 claims description 21
- 230000007257 malfunction Effects 0.000 claims description 7
- 238000013016 damping Methods 0.000 claims description 4
- 230000001960 triggered effect Effects 0.000 claims description 4
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- 239000007788 liquid Substances 0.000 claims description 2
- 238000002360 preparation method Methods 0.000 claims 1
- 230000035939 shock Effects 0.000 claims 1
- 230000001276 controlling effect Effects 0.000 abstract description 5
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 abstract 1
- 238000006073 displacement reaction Methods 0.000 description 14
- 238000010586 diagram Methods 0.000 description 6
- 230000003321 amplification Effects 0.000 description 5
- 230000008859 change Effects 0.000 description 5
- 238000003199 nucleic acid amplification method Methods 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000008901 benefit Effects 0.000 description 4
- 238000009863 impact test Methods 0.000 description 4
- 230000000670 limiting effect Effects 0.000 description 3
- 230000003750 conditioning effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000000977 initiatory effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
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Abstract
The invention discloses a kind of sulfur hexafluoride gas density relay, comprise housing, be arranged in housing and relatively independent signal control portion and indicating value display section; Signal control portion comprises control pedestal, control end seat, controls Baden's pipe, control temperature compensating plate, control connection arm, control signal regulating part and some control sensitive switches as signal generator; Control sensitive switch to arrange in the mode that the Width of its operating grip is vertical with the Width controlling Baden's pipe; Indicating value display section comprises display Baden pipe, displays temperature compensating plate, display base, display end seat, display movement, pointer, display linking arm, display regulating part and some display sensitive switches as signal generator; Sulfur hexafluoride gas density relay of the present invention can realize overpressure alarm and control, improves the precision of density monitor to greatest extent, reduces the thickness of density monitor, expands its scope of application, meet the application in various place.
Description
Technical Field
The invention relates to a sulfur hexafluoride gas density relay.
Background
At present, an oil-free gas density relay with a microswitch as a contact point is commonly adopted for monitoring the gas density of sulfur hexafluoride in sulfur hexafluoride electrical equipment, the gas density relays as disclosed in chinese patents or patent applications 200510110648.5, 200520045890.4, 200520045891.9, 200520115321.2, 200610023139.3, 200610118940.6, 200810201462.4, 200910195174.7, 201020190271.5 and 201010171798.8 (as shown in fig. 1 and 2) generally comprise a dial 1, a pointer 2, a bourdon tube 3, a temperature compensation plate 4, a base 5, a movement 6 with a display and amplification mechanism, a connecting rod 7, a housing 8, a connector 9, a microswitch 101, 102, 103, an adjusting piece 111, 112, 113, a contact operating arm 12, a connecting arm 13, an end socket 14, a wire socket 15, a watch glass 16, a cover 17, a printed circuit board 18, a positioning plate 19, a fixing plate 20, an electric wire 21 and a sulfur hexafluoride gas delivery pipe 22, wherein, the joint 9, the wire holder 15, the watch glass 16, the cover 17 and the base 5 are respectively fixed on the shell 8. The movement 6 and the fixed plate 20 are respectively mounted on the base 5, and the pointer 2 and the dial 1 are respectively fixed on the movement 6. One end of the bourdon tube 3 is welded on the base 5, the other end of the bourdon tube is connected with one end of the temperature compensation sheet 4 through the end seat 14, the other end of the temperature compensation sheet 4 is connected with the connecting arm 13, one end of the connecting arm 13 is connected with one end of the connecting rod 7, and the other end of the connecting rod 7 is connected with the machine core 6. The contact operating arm 12 is an extension of the connecting arm 13, and the adjusting members 111, 112, 113 are fixed to the contact operating arm 12. The microswitches 101, 102, 103 are soldered to a printed circuit board 18, respectively, the printed circuit board 18 being mounted on a fixing plate 20, the fixing plate 20 in turn being mounted on the base 5. The microswitches 101, 102, 103 are fixed below the adjusting pieces 111, 112, 113 in a one-to-one correspondence. Each microswitch is provided with an operating handle 1011, 1021, 1031, respectively. The positioning plate 19 is fixed at the rear end to the movement 6 and at the front end extends below the end seat 14 connecting the bourdon tube 3 and the temperature compensation fin 4. The contacts of the micro switches 101, 102, 103 are connected from the printed circuit board 18 to the wire holder 15 via wires 21, the wire holder 15 being fixed to the housing 8.
Although the micro-switches adopted by the gas density relays have the advantage of good electrical performance, the contact operating arm 12 is long and is a cantilever beam, and the key is that the impact or vibration torque is large, so that the contact operating arm 12 vibrates greatly when the sulfur hexafluoride switch is operated, and further the sulfur hexafluoride gas density relay is caused to generate misoperation or even damage to the micro-switches, the performance is completely lost, in short, the vibration resistance is poor, and the reliable work of the system is difficult to ensure. Further, the microswitches 101, 102, 103 of these gas density relays are provided so that the width direction of the operation handle is parallel to the width direction of the bourdon tube 3, so that these density relays have a large thickness, and particularly when three to four contacts are required, the thickness is large, and it is difficult to satisfy various application places.
In the gas density relays disclosed in the patent 200610023139.3 and 200610118940.6 (see fig. 3 and 4), the adopted micro switch has the advantage of good electrical performance, but because the contact operating arm 16 is long and is a cantilever beam, the key point is that the impact or vibration torque is large, when the sulfur hexafluoride switch is operated, the contact operating arm 16 vibrates greatly, and further the sulfur hexafluoride gas density relay malfunctions, that is, the vibration resistance is not good, the reliable operation of the system cannot be ensured, and great hidden danger is brought to the safe operation of a power grid. Meanwhile, the sulfur hexafluoride gas density relays cannot meet the reclosing requirements of the sulfur hexafluoride switches. That is, when the inflation pressure (density) is less than the alarm pressure value, the impact test of 50g and 11ms cannot be carried, and at this time, the latching contact may malfunction. For example: when the gas pressure (density) of the 0.6/0.52/0.5 density relay is reduced to an alarm action point, 50g and 11ms impact tests are carried out at the moment, the locking contact can generate misoperation, the switch is locked, and the reclosing requirement of the sulfur hexafluoride switch can not be met. In a word, the vibration resistance is not ideal, and the reliable work of the system is difficult to ensure. Similarly, the micro switches 91, 92, and 93 of these gas density relays are provided so that the width direction of the operation handle is parallel to the width direction of the bourdon tube 6, so that these density relays have a large thickness, and particularly when 3 to 4 contacts are required, the thickness is large, and it is difficult to satisfy various application places.
The gas density relays disclosed in patent nos. 201020190271.5 and 201010171798.8 (see fig. 5 and 6) further include a displacement amplification mechanism, the starting end of which is connected to the other end of the temperature compensation plate, and the amplification end drives the contact operating lever of the micro switch to make or break the contact on the micro switch; when the gas density value changes, the bourdon tube and the temperature compensation sheet generate displacement, and the displacement is amplified by the displacement amplification mechanism and then transmitted to the micro switch, so that the micro switch sends out a corresponding signal to complete the function of the density relay. However, when the sulfur hexafluoride switch is switched on and off, the bourdon tube and the temperature compensation plate are vibrated, the vibration can cause the displacement of the bourdon tube and the temperature compensation plate, and the displacement is amplified by the displacement amplification mechanism and then transmitted to the micro switch, so that the micro switch sends a corresponding signal. Therefore, false operation can be caused, namely, the vibration resistance is poor, the reliable work of the system cannot be ensured, and great hidden danger is brought to the safe operation of the power grid. Meanwhile, the sulfur hexafluoride gas density relays cannot meet the reclosing requirements of the sulfur hexafluoride switches. That is, when the inflation pressure (density) is less than the alarm pressure value, the impact test of 50g and 11ms cannot be carried, and at this time, the latching contact may malfunction. For example: when the gas pressure (density) of the 0.6/0.52/0.5 density relay is reduced to an alarm action point, 50g and 11ms impact tests are carried out at the moment, the locking contact can generate misoperation, the switch is locked, and the reclosing requirement of the sulfur hexafluoride switch can not be met. The problem of patent 200520115321.2 is similar to that of patent 201010171798.8, and the displacement caused by vibration is amplified by the displacement amplifying mechanism and then transmitted to the micro switch (i.e. transmitted to the control machine core shaft through the control sector gear and then transmitted to the micro switch through the control machine core shaft), so that the displacement caused by vibration is greatly amplified, which is equivalent to that the vibration becomes more serious. Because the sulfur hexafluoride switch is greatly vibrated when the switch is switched on and off, gas density relays with better vibration resistance are particularly needed, and the gas density relays cannot deal with the gas density relays. Similarly, the microswitches 101, 102, 103 of these gas density relays are provided in such a manner that the width direction of their operating handles is parallel to the width direction of the badon tube 6, so that these density relays are thick, and particularly when 3 to 4 contacts are required, the thickness thereof is so thick that it is difficult to satisfy various application places.
In addition, although the contact also adopts a micro switch, the gas density relay disclosed in patent 200810201462.4 (see fig. 7) is further provided with adjusting pieces 141 to 143 and a contact operating shaft 16 corresponding to the micro switch, wherein one end of the contact operating shaft 16 is connected to the rotating shaft 24 of the sector gear of the movement 2 and rotates along with the rotating shaft 24 of the sector gear, threaded through holes corresponding to the micro switches 91 to 93 are radially formed in the contact operating shaft 16 at intervals along the length direction, the adjusting pieces 141 to 143 are inserted into the threaded through holes one to one and the end portions thereof abut against operating handles of the micro switches 91 to 93. The contact operating shaft 16 fixed to the rotating shaft 24 of the sector gear is rotated, and the micro switches 91 to 93 are driven by the adjusting members 141 to 143 fixed to the contact operating shaft 16. Since the rotation angle of the rotation shaft 24 of the sector gear is small, the precision of the product is lowered. More serious, the action stroke of the operating handle of the micro switch is short, and the adjusting pieces 141-143 adopt adjusting screws. When the Bardon tube 6 moves, the sector gear shaft 24 with the machine core 2 rotates, so that the adjusting screw rotates to touch the operating handle of the microswitch, the operating handle is driven to press a movable contact of the switch, and under the condition that the end face of the adjusting screw is rotated to be perpendicular to the operating handle of the microswitch, the adjusting screw is clamped and cannot rotate, so that a full-range density relay with the pressure of-0.1-0.9 MPa is difficult to realize, particularly, the display with the initial pressure of-0.1 MPa is difficult to realize, the display cannot be realized during vacuum pumping, and the popularization and application are difficult. Similarly, the micro switches 91 to 93 of the gas density relay are provided in such a manner that the width direction of the operating handle is parallel to the width direction of the bourdon tube 6, so that the density relay is thick, and particularly when 3 to 4 contacts are required, the thickness is very thick, which makes it difficult to satisfy various application places. Innovations are highly desirable.
In addition, patent 200810201462.4 (see fig. 8) discloses a gas density relay, which has a micro switch as a contact, and also has a malfunction preventing mechanism to improve vibration resistance. Similarly, the micro switches 91 to 93 of the gas density relay are provided in such a manner that the width direction of the operating handle is parallel to the width direction of the badon tube 6, and a malfunction prevention mechanism is added, so that the thickness of the density relay is thick, and particularly when 3 to 4 contacts are required, the thickness is thick, and it is difficult to satisfy various application places. Innovations are highly desirable.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the sulfur hexafluoride gas density relay which is higher in vibration resistance, better in contact and electrical performance of a contact of a signal generator, long in service life and high in precision.
The purpose of the invention is realized as follows: a sulfur hexafluoride gas density relay comprises a shell, a signal control part and a value display part, wherein the signal control part and the value display part are arranged in the shell and are relatively independent; the signal control part comprises a control base, a control end seat, a control Barton tube, a control temperature compensation piece, a control connecting arm, a control signal adjusting piece and a plurality of control micro switches serving as a signal generator, wherein the control micro switches are arranged in a row, the control end seat is respectively connected with one end of the control Barton tube and one end of the control temperature compensation piece, the other end of the control Barton tube is connected to the control base, the other end of the control temperature compensation piece is connected with the control connecting arm, and the control signal adjusting piece is installed on the control connecting arm and arranged in pairs corresponding to operating handles of the control micro switches; the indicating value display part comprises a display bourdon tube, a display temperature compensation sheet, a display base, a display end seat, a display machine core and a pointer, wherein one end of the display bourdon tube is connected to the display base, the other end of the display bourdon tube is connected with one end of the display temperature compensation sheet through the display end seat, the other end of the display temperature compensation sheet is connected with the starting end of the display machine core, and the pointer is connected with a central shaft of the display machine core; wherein,
the control microswitch is arranged in a mode that the width direction of an operating handle of the control microswitch is vertical to the width direction of the control badon tube;
the indicating value display part is still including showing the linking arm, showing signal conditioning piece and a plurality of demonstration micro-gap switch as signal generator, the other end that shows the temperature compensation piece is connected with showing the linking arm, the initiating terminal that shows the core is connected on showing the linking arm, it has operating handle to show micro-gap switch, and show micro-gap switch with its operating handle's width direction with the width direction that shows the bourdon tube sets up in the width direction vertically mode, it installs on showing the linking arm and corresponding to show signal conditioning piece show micro-gap switch's operating handle sets up in pairs.
In the sulfur hexafluoride gas density relay, the control connecting arm includes a longitudinal portion parallel to the width direction of the control bourdon tube and a transverse portion perpendicular to the width direction of the control bourdon tube, and is L-shaped or T-shaped, a plurality of threaded holes for mounting the control signal adjusting member are formed on the surface of the transverse portion of the control connecting arm corresponding to the operating handle of the control microswitch, and the longitudinal portion of the control connecting arm is connected with the other end of the control temperature compensating sheet.
In the sulfur hexafluoride gas density relay, the display connecting arm is bent, a plurality of threaded holes for mounting the display signal adjusting piece are formed in the surface of one end of the display connecting arm corresponding to the operating handle of the display microswitch, the middle of the display connecting arm is connected with the other end of the display temperature compensating piece, and the other end of the display connecting arm is connected with the display core.
In the sulfur hexafluoride gas density relay, the signal control part further comprises an anti-misoperation mechanism; the misoperation preventing mechanism comprises a fixed seat, a rotating shaft and a rotating deflector rod, and the fixed seat is arranged in the shell; the rotating shaft is arranged on the fixed seat; the rotating deflector rod is arranged on the rotating shaft and is abutted against the operating handle of each control microswitch; when the gas density relay is impacted and vibrated by the switching-on and switching-off of the sulfur hexafluoride switch, the rotating deflector rod of the misoperation preventing mechanism swings and the operating handle of each control microswitch is deflected towards the direction of increasing the gas density, so that the control microswitch is far away from the position where the misoperation occurs, and the control microswitch is prevented from being triggered by mistake when the gas density is normal by the control signal regulating part.
In the sulfur hexafluoride gas density relay, the width of the contact part of the operating handle of the control microswitch and the control signal adjusting part is more than or equal to 5 mm.
In the sulfur hexafluoride gas density relay, the display core is further provided with a damping mechanism.
In the sulfur hexafluoride gas density relay, the shell is filled with the shockproof liquid.
Compared with the prior art, the technical scheme of the sulfur hexafluoride gas density relay has the following obvious advantages and characteristics:
1. because the density relay adopts a relatively independent signal control part and an indication value display part, and the indication value display part is innovative and also has the function of realizing contact signal output, the overpressure alarm and control can be realized, and the precision of the density relay is improved to the maximum extent;
2. meanwhile, the control microswitch is arranged in a mode that the width direction of an operating handle of the control microswitch is vertical to the width direction of the control Barton tube, so that the innovative design aims to reduce the impact or vibration moment on the control connecting arm when the gas density relay is impacted or vibrated, further reduce the impact or vibration force on the control Barton tube, avoid the control microswitch from being triggered by mistake when the gas density is normal by a control signal regulating part, greatly improve the vibration resistance of the density relay and ensure the reliable work of the system;
3. the control microswitch is arranged in a mode that the width direction of the operating handle of the control microswitch is perpendicular to the width direction of the control Bardon tube, and a contact signal output function is realized on the indication value display part, so that the innovative design aims to reduce the thickness of the density relay and enlarge the application range of the density relay, particularly, the density relay with 4-5 contacts and thin thickness can be manufactured, and the application in various places is met. The thickness of the density relay adopting 4-5 contacts is equal to that of the traditional density relay with 2 contacts, which is a very useful innovation.
In summary, the sulfur hexafluoride gas density relay of the present invention includes: A. the contact return difference of the density relay is met; B. the vibration resistance of the density relay can be greatly improved, when the density is normal, when the switch is switched on and off to generate impact or vibration, the impact or vibration moment borne by the switch is reduced, so that the impact or vibration force borne by the bourdon tube is reduced, the signal adjusting piece is prevented from mistakenly triggering the micro switch when the gas density is normal, the vibration resistance of the density relay is greatly improved, and the control system cannot be failed; C. the output of false operation signals can not be caused; D. meanwhile, during debugging, the precision of the density relay is easy to adjust, and the high-precision density relay is easy to manufacture; E. meanwhile, the stability is better; F. particularly, the high-density relay with 4-5 contacts and a very thin thickness can be manufactured, and the high-density relay meets the application requirements of various places.
Drawings
FIG. 1 is a schematic structural diagram of a first pointer sulfur hexafluoride gas density relay in the prior art;
FIG. 2 is a partial side view of FIG. 1;
FIG. 3 is a schematic structural diagram of a second pointer sulfur hexafluoride gas density relay in the prior art;
FIG. 4 is a partial side view of FIG. 3;
FIG. 5 is a schematic structural diagram of a third pointer sulfur hexafluoride gas density relay in the prior art;
FIG. 6 is a partial side view of FIG. 5;
FIG. 7 is a schematic diagram of a fourth pointer sulfur hexafluoride gas density relay of the prior art;
FIG. 8 is a schematic structural diagram of a fifth pointer sulfur hexafluoride gas density relay in the prior art;
FIG. 9 is a schematic diagram of a sulfur hexafluoride gas density relay of the present invention;
FIG. 10 is a partial rear view of FIG. 9;
fig. 11 is a top view of a connecting arm in a sulfur hexafluoride gas density relay of the present invention.
Detailed Description
In order to better understand the technical solution of the present invention, the following detailed description is made with reference to the accompanying drawings by way of specific embodiments.
Referring to fig. 9 to 11, the sulfur hexafluoride gas density relay of the present invention includes a housing, and a signal control portion and a value display portion which are relatively independent and are disposed in the housing. The signal control part comprises a control base 19, a control end seat 241, a control bourdon tube 61, a control temperature compensation sheet 71, a control connecting arm 161, signal adjusting pieces 141 and 142 and a plurality of micro switches 91 and 92 serving as signal generators, one end of the control bourdon tube 61 is connected to the control base 241, the other end of the control bourdon tube is connected with one end of the control temperature compensation sheet 71 through the control end seat 241, and the other end of the control temperature compensation sheet 71 is connected with the control connecting arm 161; two control signal adjusting pieces 141 and 142 are arranged on the control connecting arm 161; two microswitches 91 and 92 are arranged on the fixing plate 121 at intervals in a row through a reinforcing mechanism and are correspondingly arranged below the control signal adjusting pieces 141 and 142, the two control microswitches 91 and 92 are arranged in a mode that the width direction of the operating handles of the two control microswitches is vertical to the width direction of the control bourdon tube 61 (the arrangement direction of the two microswitches 91 and 92 is vertical to the width direction of the control bourdon tube 61), and the microswitches 91 and 92 are respectively provided with operating handles 911 and 921; the fixing plate 121 is fixed to the control base 19. The signal control part is also provided with an anti-seismic limiting part which has a limiting effect on the control connecting arm 16, so that the anti-seismic performance is improved.
In order to improve the vibration resistance and ensure that the density relay system does not fail, the widths B of the operating handles 911 and 921 of the two control micro switches 91 and 92 at the contact parts with the control signal adjusting pieces 141 and 142 are more than or equal to 5mm, and the width B = 6-8 mm in the case. The purpose of this design is: when the control signal adjusting pieces 141 and 142 control the micro switch to vibrate or impact, the control signal adjusting pieces cannot be dislocated with the operating handles 911 and 921 for controlling the micro switch or the operating handles 911 and 921 are not clamped, the reliability of the density relay is ensured, and the vibration resistance is improved.
The signal control part also comprises a malfunction prevention mechanism; the misoperation preventing mechanism comprises a rotating deflector rod, a rotating shaft and a fixed seat, wherein the rotating deflector rod is arranged on the rotating shaft and comprises a rotating part and a deflector rod arranged at the upper end of the rotating part, the deflector rod is abutted against an operating handle for controlling the micro switches 91 and 92, and the rotating center and the gravity center of the rotating deflector rod are not concentric; the rotating shaft is fixed on the fixed seat, and the fixed seat is fixed on the control base or the control machine core. When the gas density relay is impacted or vibrated, the rotating deflector rod of the misoperation preventing mechanism swings, and the deflector rod can deflect the operating handle of each control microswitch 91 and 92 towards the direction of increasing density (pressure), so that the control microswitch 91 and 92 is far away from the position where the misoperation occurs, and the control microswitch 91 and 92 can be prevented from being triggered by the control signal adjusting parts 141 and 142 by mistake when the gas density is normal.
Particularly, the indication value display part comprises a display bourdon tube 62, a display temperature compensation sheet 72, a display base 19, a display end seat 242, a display connecting arm 162, a display movement 2, a connecting rod 15, a pointer, a display microswitch 93 and a display adjusting piece 143, wherein one end of the display bourdon tube 62 is connected to the display base 19, and the other end of the display bourdon tube 62 is connected with one end of the display temperature compensation sheet 72 through the display end seat 242; the display microswitch 93 is fixed on the fixing plate in such a manner that the width direction of the operation handle is perpendicular to the width direction of the display badon tube 62; the display connecting arm 162 is bent, a threaded hole for installing the display signal adjusting piece 143 is formed in the surface of one end of the display connecting arm 162 corresponding to the operating handle of the display microswitch 93, the middle of the display connecting arm 162 is connected with the other end of the display temperature compensating piece 72, and the other end of the display connecting arm 162 is connected with one end of the connecting rod 15; the display signal adjusting part 143 is arranged below the display microswitch 93; the other end of the connecting rod 15 is connected with the starting end of the display movement 2, and the pointer is connected with the central shaft of the display movement 2; the display core 2 is also provided with a damping mechanism.
The action principle of the sulfur hexafluoride gas density relay is that the bourdon tube is controlled or the bourdon tube is displayed based on the elastic element, and the pressure and the temperature which change are corrected by utilizing the control temperature compensation sheet or the display temperature compensation sheet so as to reflect the change of the sulfur hexafluoride gas density. Under the pressure of the measured medium sulfur hexafluoride gas, the change of the gas density value in the electric switch and the corresponding change of the pressure value are forced by the change of the control temperature compensation sheet or the display temperature compensation sheet, so that the tail end of the control bourdon tube or the display bourdon tube generates corresponding elastic deformation-displacement, the elastic deformation-displacement is transmitted to the display machine core 2 by the display temperature compensation sheet and the connecting rod, the display machine core transmits the elastic deformation-displacement to the pointer, and the measured sulfur hexafluoride gas density value is indicated on the dial. If the air leakage of the electric switch occurs, the density value is reduced to a certain degree (reaching an alarm or locking value), the control or display barton pipe generates corresponding downward displacement, the control or display connecting arm is displaced downward by controlling the temperature compensation sheet or the display temperature compensation sheet, the control or display signal adjusting piece on the control or display connecting arm is gradually separated from the corresponding control or display microswitch, when the certain degree is reached, the contact of the corresponding control or display microswitch is switched on, and a corresponding signal (alarm or locking) is sent out, so that the density of sulfur hexafluoride gas in equipment such as the electric switch is monitored and controlled, and the electric equipment works safely. If the density value in the electric switch is increased, the pressure value is correspondingly increased to a certain degree, the control or display barton pipe is also correspondingly displaced upwards, the control or display connecting arm is displaced upwards by controlling the temperature compensation sheet or the display temperature compensation sheet, the control signal adjusting piece or the display signal adjusting piece on the control or display connecting arm is displaced upwards and pushes the corresponding contact of the control microswitch or the display microswitch to be disconnected, and the signal (alarm or locking) is released.
Because the signal control part adopts the anti-misoperation mechanism and the shell is filled with the shockproof oil, when the switch is switched on and off to generate vibration, the shockproof damping effect of the shockproof oil is more obvious, the microswitch is controlled to be far away from the position where the misoperation occurs during the impact or vibration period, the locking contact of the density relay is ensured not to generate the misoperation, the switch is not locked, the reclosing requirement of the sulfur hexafluoride switch can be met, and the reliable work of a power grid system is ensured.
The number of the control micro-switches or the display micro-switches is not limited, and can be one, two, three, four or five.
The sulfur hexafluoride gas density relay adopts a relatively independent signal control part and an indication value display part, and the indication value display part also has the function of realizing contact signal output, so that overpressure alarm and control can be realized, and the precision of the density relay is improved to the maximum extent.
The sulfur hexafluoride gas density relay of the present invention further employs two control micro switches 91, 92 arranged in such a manner that the width direction of the operation handle thereof is perpendicular to the width direction of the control bourdon tube 61, and a display micro switch 93 arranged in such a manner that the width direction of the operation handle thereof is perpendicular to the width direction of the display bourdon tube 62, so that the innovative design is aimed at making the control connecting arm 161L-shaped or T-shaped, that is, the control connecting arm 161 includes a longitudinal portion parallel to the width direction of the control bourdon tube 61 and a transverse portion perpendicular to the width direction of the control bourdon tube 61 and is L-shaped (see FIG. 11), the relative length of the control connecting arm 161 can be shortened, when the gas density relay is subjected to an impact or vibration, the impact or vibration moment received by the control connecting arm 161 is reduced, and further the impact or vibration force received by the control bourdon tube 61 is reduced, the control signal adjusting pieces 141 and 142 are prevented from triggering the control micro switches 91 and 92 by mistake when the gas density is normal, so that the vibration resistance of the density relay is greatly improved, and the reliable work of the system is ensured; meanwhile, the thickness of the density relay can be reduced by adopting the innovative design, and the function of outputting contact signals is realized on the value display part, so that the density relay with small volume and thin thickness can be manufactured, namely the X-axis direction shown in fig. 9 is reduced. If the contact is added, namely, if the micro switch is added, the thickness of the density relay can be unchanged in the X-axis direction as long as the thickness is increased in the Z-axis direction. Particularly, the high-density relay with 4-5 contacts and a very thin thickness can be manufactured, and the high-density relay meets the application requirements of various places. The thickness of the density relay with 4-5 contacts after the innovative technology is equal to that of the traditional density relay with 2 contacts, and the innovative technology is very useful innovation. The gas density relay has the advantages of high precision, small volume, multiple contacts, high vibration resistance, good electrical performance of the signal generator, good contact of the contacts, long service life and the like, ensures the reliable work of the system, is a genuine sulfur hexafluoride gas density relay with excellent performance, and can be well applied to various sulfur hexafluoride electrical equipment and various occasions.
The above embodiments are provided only for illustrating the present invention and not for limiting the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, and therefore all equivalent technical solutions should also fall within the scope of the present invention, and should be defined by the claims.
Claims (6)
1. A sulfur hexafluoride gas density relay comprises a shell, a signal control part and a value display part, wherein the signal control part and the value display part are arranged in the shell and are relatively independent; the signal control part comprises a control base, a control end seat, a control Barton tube, a control temperature compensation piece, a control connecting arm, a control signal adjusting piece and a plurality of control micro switches serving as a signal generator, wherein the control micro switches are arranged in a row, the control end seat is respectively connected with one end of the control Barton tube and one end of the control temperature compensation piece, the other end of the control Barton tube is connected to the control base, the other end of the control temperature compensation piece is connected with the control connecting arm, and the control signal adjusting piece is installed on the control connecting arm and arranged in pairs corresponding to operating handles of the control micro switches; the indicating value display part comprises a display bourdon tube, a display temperature compensation sheet, a display base, a display end seat, a display machine core and a pointer, wherein one end of the display bourdon tube is connected to the display base, the other end of the display bourdon tube is connected with one end of the display temperature compensation sheet through the display end seat, the other end of the display temperature compensation sheet is connected with the starting end of the display machine core, and the pointer is connected with a central shaft of the display machine core; it is characterized in that the preparation method is characterized in that,
the control microswitch is arranged in a mode that the width direction of an operating handle of the control microswitch is vertical to the width direction of the control badon tube;
the indicating value display part also comprises a display connecting arm, a display signal adjusting piece and a plurality of display microswitches serving as signal generators, the other end of the display temperature compensation sheet is connected with the display connecting arm, the starting end of the display core is connected onto the display connecting arm, the display microswitches are provided with operating handles, the display microswitches are arranged in a mode that the width direction of the operating handles is vertical to the width direction of the display Barton tube, the display signal adjusting piece is arranged on the display connecting arm and corresponds to the operating handles of the display microswitches in pairs,
the control connecting arm comprises a longitudinal portion parallel to the width direction of the control badon tube and a transverse portion perpendicular to the width direction of the control badon tube and is L-shaped or T-shaped, a plurality of threaded holes used for installing the control signal adjusting piece are formed in the surface of the transverse portion of the control connecting arm corresponding to the operating handle of the control microswitch, and the longitudinal portion of the control connecting arm is connected with the other end of the control temperature compensating piece.
2. The sulfur hexafluoride gas density relay according to claim 1, wherein the display connecting arm is curved, a plurality of threaded holes for mounting the display signal adjusting piece are formed in a surface of one end of the display connecting arm corresponding to the operating handle of the display microswitch, a middle portion of the display connecting arm is connected with the other end of the display temperature compensating plate, and the other end of the display connecting arm is connected with the display core.
3. The sulfur hexafluoride gas density relay as claimed in claim 1, wherein said signal control portion further includes a malfunction prevention mechanism;
the misoperation preventing mechanism comprises a fixed seat, a rotating shaft and a rotating deflector rod, and the fixed seat is arranged in the shell; the rotating shaft is arranged on the fixed seat; the rotating deflector rod is arranged on the rotating shaft and is abutted against the operating handle of each control microswitch;
when the gas density relay is impacted and vibrated by the switching-on and switching-off of the sulfur hexafluoride switch, the rotating deflector rod of the misoperation preventing mechanism swings and the operating handle of each control microswitch is deflected towards the direction of increasing the gas density, so that the control microswitch is far away from the position where the misoperation occurs, and the control microswitch is prevented from being triggered by mistake when the gas density is normal by the control signal regulating part.
4. The sulfur hexafluoride gas density relay as claimed in claim 1, wherein the width of the contact position of the operating handle of the control microswitch and the control signal adjusting piece is greater than or equal to 5 mm.
5. The sulfur hexafluoride gas density relay as claimed in claim 1, wherein said display movement is further provided with a damping mechanism.
6. The sulfur hexafluoride gas density relay as claimed in claim 1, wherein the housing is further filled with a shock absorbing liquid.
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| CN201410018847.2A CN103715010B (en) | 2014-01-16 | 2014-01-16 | A kind of sulfur hexafluoride gas density relay |
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| CN201410018847.2A CN103715010B (en) | 2014-01-16 | 2014-01-16 | A kind of sulfur hexafluoride gas density relay |
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| CN103715010B true CN103715010B (en) | 2015-12-02 |
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Cited By (1)
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| CN103700541A (en) * | 2014-01-16 | 2014-04-02 | 上海乐研电气科技有限公司 | Thin sulfur hexafluoride gas density relay |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104299844B (en) * | 2014-10-21 | 2016-08-24 | 上海乐研电气科技有限公司 | A kind of wide range sulfur hexafluoride gas density relay |
| CN106057570A (en) * | 2016-07-22 | 2016-10-26 | 上海上芃电气有限公司 | Sulfur hexafluoride density relay and density table C-shaped pipe and making technology thereof |
| CN107863268B (en) * | 2017-11-29 | 2019-12-10 | 上海乐研电气有限公司 | Method for realizing holding of overpressure signal of gas density relay |
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Effective date of registration: 20170104 Address after: 201800 Shanghai City, Jiading District Nanxiang Town, Yun North Road 1755 Lane 21, B zone four Patentee after: Shanghai joy Electric Co., Ltd. Address before: Qingpu District of Shanghai city Shen brick road building 200237 new No. 221 Building 1 B zone 1 room 123 Patentee before: Shanghai Roye Electronic Science & Technology Co., Ltd. |