CN209766320U - High-precision SF6Gas density relay - Google Patents

High-precision SF6Gas density relay Download PDF

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Publication number
CN209766320U
CN209766320U CN201821597213.7U CN201821597213U CN209766320U CN 209766320 U CN209766320 U CN 209766320U CN 201821597213 U CN201821597213 U CN 201821597213U CN 209766320 U CN209766320 U CN 209766320U
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micro
microswitch
density relay
signal
gas density
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金海勇
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Shanghai Leyan Electric Co Ltd
Shanghai Roye Electric Science and Technology Co Ltd
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Shanghai Leyan Electric Co Ltd
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Abstract

High-precision SF6The gas density relay comprises a gas density relay shell, a base, an end seat, a Bardon tube, a temperature compensation element, a signal adjusting mechanism and a plurality of micro switches serving as signal generators, wherein the base, the end seat, the Bardon tube, the temperature compensation element and the signal adjusting mechanism are arranged in the shell; one end of the microswitch contact triggering element is fixed in the shell, and the other end of the microswitch contact triggering element is arranged corresponding to the buttons of the button type microswitch and is abutted against the buttons of each microswitch in a one-to-one correspondence manner; when the gas density value changes, the bourdon tube and the temperature compensation element generate displacement, the displacement drives the micro-switch contact triggering element through the signal triggering mechanism in sequence, and the micro-switch contact triggering element changes in position to enable the micro-switch to send out signalsAnd corresponding signals are used for completing the function of the gas density relay. The utility model discloses a density relay has the precision height, the good advantage of contact conducting property, can use well on SF6 electrical equipment.

Description

High-precision SF6Gas density relay
Technical Field
The utility model relates to a gas density relay especially relates to a high accuracy SF6 gas density relay.
Background
SF6And mixed gas thereof or other environment-friendly gas electrical products are widely applied to the power sector and industrial and mining enterprises, and promote the rapid development of the power industry. And SF6The arc-extinguishing medium and the insulating medium of the electric product areSF6Gas, no leakage can occur. If air leakage occurs, SF cannot be guaranteed6the electric product can operate reliably and safely. So that SF is monitored6SF of electrical products6Density values are very necessary.
At present, a mechanical pointer SF is generally adopted6Gas density relay to monitor SF6Density, i.e. when SF6The relay can give an alarm and be locked when the electric product leaks air, and can display the field density value. The contact of the density relay generally adopts a hairspring type magnetic-assisted electric contact, although the magnetic-assisted attraction is increased. However, the magnetic-assisted electric contact density relay generally adopts a hairspring type electric contact, and when the density is higher than a set value, the movable contact moves along with the pointer, so the force of the hairspring cannot be large, otherwise, the displayed value is not correct. In addition, the magnetic-assisted attraction force cannot be adjusted too large, otherwise the return value of the density relay is large and exceeds the technical standard. Therefore, for the magnetic-assisted electric contact, the contact closing force is small, the time is long, and if the contact is oxidized, the contact is not opened or the contact is not reliable. In the case of the oil-free type, the magnetic assistant type electric contact is exposed in the air, is very easy to oxidize or accumulate dust, and the contact is easy to be in poor contact or not communicated. It is particularly emphasized that in coastal areas, the contact points are easy to contact poorly or not through due to the fact that air is humid and contains salt fog. Although the oil-filled type and magnetic-assisted type electric contact is soaked in silicone oil, the contact performance is reduced after a long time and a plurality of actions, and the contact is poor or not communicated due to the insulating effect of an oil film. Tests have shown that contact-unreliable phenomena occur, especially at low temperatures. In addition, the density relay has oil leakage defect, and for the density relay with oil leakage, the magnetic assistant type electric contact is exposed in the air and is very easy to oxidize or even accumulate dust, and the contact is easy to be in poor contact or not to be communicated.
The current market also develops an SF with a microswitch used as a contact point6Gas density relay, SF6The microswitch adopted by the gas density relay is provided with a swing rod (or the microswitch is provided with an operating arm),the structure is shown in fig. 1, as the swing rod 902 is provided with the shaft 903, the shaft 903 is arranged on the microswitch 9. In order to allow the rocker 902 to rotate flexibly, the shaft 903 is provided with a clearance on the microswitch 9, and the shaft 903 is made of a thin sheet, is not very round, has a large clearance, and causes the rocker 902 to swing. The accuracy of such a density relay is not very stable because the displacement of the bourdon tube is also small, there is a gap, and a wobble is generated. Because the position of the swing rod changes due to the clearance and the swing of the swing rod, the precision of the microswitch type density relay is deviated, the microswitch type density relay is not stable, and the high precision of the density relay is difficult to realize. SF mentioned above6Although the microswitch adopted by the gas density relay has certain advantages, the microswitch is unreasonable in structure, so that the following problems still exist in use:
1) When the density relay vibrates, the swing rod has a gap, and the position of the swing rod is slightly changed, so that the precision of the density relay is seriously influenced. 2) Meanwhile, during debugging, the precision is difficult to be adjusted accurately, namely, a high-precision density relay is difficult to be manufactured.
In view of the above, it is necessary to develop a high-precision, high-electrical-performance gas density relay to ensure SF6And the gas electrical equipment can work reliably.
SUMMERY OF THE UTILITY MODEL
in order to solve the problems existing in the prior art, the utility model aims to provide a fine high-precision SF of electrical property6Gas density relay for controlling and monitoring SF in sealed container6Equal density of gas and for SF6And when the gas leakage condition occurs in the gas electrical equipment, an alarm signal and a locking signal are sent out in time, so that the electric power safety is guaranteed.
high-precision SF6The gas density relay comprises a gas density relay shell, a base, an end seat, a Bardon tube, a temperature compensation element, a signal adjusting mechanism and a plurality of micro switches serving as signal generators, wherein the base, the end seat, the Bardon tube, the temperature compensation element and the signal adjusting mechanism are arranged in the shell; one end of the bourdon tube is connected to the base, and the bourdon tubethe other end of the temperature compensation element is connected with the end seat, one end of the temperature compensation element is connected with the end seat, and the other end of the temperature compensation element is connected with the signal adjusting mechanism;
The microswitch is a button type microswitch;
the gas density relay also comprises a microswitch contact triggering element, one end of the microswitch triggering element is provided with a fixed shaft, the microswitch contact triggering element is fixed in the shell through the fixed shaft, the microswitch triggering element can move around the fixed shaft relative to the microswitch, and the other end of the microswitch triggering element is arranged corresponding to the buttons of the button type microswitch and is abutted against the buttons of each microswitch in a one-to-one correspondence manner;
When the gas density value changes, the bourdon tube and the temperature compensation element generate displacement, the displacement drives the micro-switch contact point trigger element through the signal trigger mechanism in sequence, and when the gas density value reaches a corresponding set value, the micro-switch contact point trigger element presses or is far away from a button of the micro-switch, so that the micro-switch generates a corresponding signal, and the function of a gas density relay is completed.
Still including showing core, calibrated scale and pointer, the one end of temperature compensation component through show the connecting rod with show the core and connect or the one end of temperature compensation component is direct to be connected with the display core, the pointer install in on the display core and locate before the calibrated scale.
High-precision SF6The gas density relay comprises a relatively independent signal control part and a value display part; the signal control part comprises a control base, a control end seat, a control bourdon tube, a control temperature compensation element, a signal adjusting mechanism and a plurality of micro switches serving as signal generators; one end of the control bourdon tube is connected to the control base, the other end of the control bourdon tube is connected to the control end seat, one end of the control temperature compensation element is connected to the control end seat, and the other end of the control temperature compensation element is connected with the signal adjusting mechanism;
The microswitch is a button type microswitch;
The gas density relay also comprises a microswitch contact triggering element, one end of the microswitch triggering element is provided with a fixed shaft, the microswitch contact triggering element is fixed in the shell through the fixed shaft, the microswitch triggering element can move around the fixed shaft relative to the microswitch, and the other end of the microswitch triggering element is arranged corresponding to the buttons of the button type microswitch and is abutted against the buttons of each microswitch in a one-to-one correspondence manner;
When the gas density value changes, the bourdon tube and the temperature compensation element generate displacement, the displacement drives the microswitch contact point trigger element through the signal trigger mechanism in sequence, and when the gas density value reaches a corresponding set value, the microswitch contact point trigger element presses or is far away from a button of the microswitch, so that the microswitch generates a corresponding signal, and the function of a gas density relay is completed;
The indicating value display part comprises a display bourdon tube, a display temperature compensation element, a display base, a display end seat, a display core, a dial and a pointer, one end of the display bourdon tube is connected to the display base, the other end of the display bourdon tube is connected to the display end seat, one end of the display temperature compensation element is connected to the display end seat, the other end of the display temperature compensation element is connected to the display core or the other end of the temperature compensation element is directly connected to the display core, and the pointer is installed on the display core and is arranged in front of the dial.
The elastic piece is fixed in the shell and corresponds to the contact point trigger element of the microswitch.
The limiting part limits the signal adjusting mechanism to move within a certain range, and protects the micro-switch contact triggering element from moving within a certain range all the time.
The signal adjusting mechanism is provided with an adjusting screw.
The shape of the micro-switch contact triggering element can be straight or bent.
The relative position of the microswitch contact activating element and the microswitch can be horizontal or inclined.
The effective width of the contact part of the front end of the micro-switch contact point trigger element and the signal adjusting mechanism is 4.0-18 mm.
the limiting mechanism is further included, and when the density relay is vibrated, the limiting mechanism ensures that the signal adjusting mechanism moves within a normal working range.
the density relay further comprises a buffering balance mechanism, and the buffering balance mechanism improves the anti-vibration level of the density relay.
The temperature compensation element is a bimetallic strip or a gas-filled bourdon tube.
the signal control part is provided with a malfunction prevention mechanism.
the gas density relay also comprises a pressure sensor, a temperature sensor, a signal processing unit and a signal transmission unit, and the signal transmission unit is provided with a remote transmission signal to realize the online density monitoring.
And a limiting mechanism is also adjustably installed in the shell and limits the signal adjusting mechanism to a set corresponding position which is greater than the density alarm value.
A method of improving the accuracy of a gas density relay, comprising: the gas density relay comprises a gas density relay shell, a base, an end seat, a Bardon tube, a temperature compensation element, a signal adjusting mechanism and a plurality of micro switches serving as signal generators, wherein the base, the end seat, the Bardon tube, the temperature compensation element, the signal adjusting mechanism and the micro switches are arranged in the shell; one end of the Bardon tube is connected to the base, the other end of the Bardon tube is connected to the end seat, one end of the temperature compensation element is connected to the end seat, and the other end of the temperature compensation element is connected with the signal adjusting mechanism; the microswitch is a button type microswitch; the gas density relay also comprises a microswitch contact triggering element, one end of the microswitch triggering element is provided with a fixed shaft, the microswitch contact triggering element is fixed in the shell through the fixed shaft, the microswitch triggering element can move around the fixed shaft relative to the microswitch, and the other end of the microswitch triggering element is arranged corresponding to the buttons of the button type microswitch and is abutted against the buttons of each microswitch in a one-to-one correspondence manner;
when the gas density value changes, the bourdon tube and the temperature compensation element generate displacement, the displacement drives the microswitch contact point trigger element sequentially through the signal trigger mechanism, and when the gas density value reaches a corresponding set value, the microswitch contact point trigger element presses or is far away from a button of the microswitch, so that the microswitch generates a corresponding signal, and the function of a gas density relay is completed;
When the gas density of electrical equipment descends, the bourdon tube and the temperature compensation element of the gas density relay produce displacement, and the signal trigger mechanism also follows to produce the displacement, and the micro-gap switch contact trigger element also follows to produce the displacement this moment, when the certain degree, makes micro-gap switch sends corresponding signal.
the elastic piece is fixed in the shell and corresponds to the contact point trigger element of the microswitch.
when the signal trigger mechanism generates displacement, the contact point trigger element of the microswitch also generates displacement under the action of the elastic force of the elastic part and/or the elastic force of the microswitch button or/and the thrust of the signal trigger mechanism, and when the set value is reached, the microswitch sends out corresponding alarm or locking signal
The utility model discloses high accuracy SF6Compared with the prior art, the gas density relay has the following obvious advantages and characteristics due to the adoption of the technical scheme:
1. Because the microswitch is used as a signal generator of the density relay, the reliable conduction of the contact can be ensured, and the reliable work of the system is ensured.
2. Because the micro switch contact triggering element comprises a shaft and moves along the shaft, one end of the micro switch contact triggering element is connected to the shaft, and the other end of the micro switch contact triggering element is arranged corresponding to the buttons of the button type micro switch and is abutted against the buttons of each micro switch in a one-to-one correspondence manner; the micro switch contact point trigger element makes the micro switch send out corresponding alarm or locking signal by means of the elastic force of the elastic part or the pushing force of the signal trigger mechanism. And the microswitch contact triggering element one end is connected on the axle, this axle machining, very round, can cooperate very well, its interval is very little, has avoided rocking simultaneously, and then just can not cause the precision to become very poor, when vibrating or transporting, just can not influence the precision of density relay basically for the precision of density relay is very stable. Meanwhile, during debugging, the precision is very easy to be adjusted accurately, and a high-precision density relay is very easy to be manufactured.
Drawings
The present invention will be further explained with reference to the accompanying drawings:
FIG. 1 is a schematic structural diagram of a microswitch of a pointer type gas density relay in the prior art;
FIG. 2 shows the SF according to the first embodiment of the present invention6The structure schematic diagram of the gas density relay;
FIG. 3 shows a high-precision SF according to the first embodiment of the present invention6A schematic cross-sectional view of a gas density relay;
FIG. 4 shows the SF according to the first embodiment of the present invention6An illustration diagram of a microswitch signal structure of a gas density relay;
FIG. 5 shows the high-precision SF according to the second embodiment of the present invention6a schematic cross-sectional view of a gas density relay;
FIG. 6 shows the high-precision SF according to the second embodiment of the present invention6an illustration diagram of a microswitch signal structure of a gas density relay;
FIG. 7 shows high-precision SF according to the third embodiment of the present invention6An illustration diagram of a microswitch signal structure of a gas density relay;
FIG. 8 shows high-precision SF according to the fourth embodiment of the present invention6An illustration diagram of a microswitch signal structure of a gas density relay;
FIG. 9 shows high-precision SF according to the fifth embodiment of the present invention6An illustration diagram of a microswitch signal structure of a gas density relay;
FIG. 10 shows the present inventionHigh-precision SF of example six6A schematic cross-sectional view of a gas density relay;
FIG. 11 shows the high-precision SF of the present invention6An embodiment of a microswitch contact triggering element of a gas density relay;
FIG. 12 shows the high-precision SF of the present invention6another embodiment of a microswitch contact triggering element for a gas density relay is shown.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The utility model provides a gas density relay of high accuracy explains and explains for the example. Referring to fig. 2, fig. 3 and fig. 4 specifically, fig. 2 and fig. 3 are schematic partial cross-sectional views of a sulfur hexafluoride gas density relay according to a first embodiment of the present invention, as shown in fig. 2, fig. 3 and fig. 4, a first embodiment of the present invention discloses a high-precision SF6gas density relay with SF6A gas density relay is an example. The utility model discloses high accuracy SF6The gas density relay mainly comprises a connector 1, a display movement 2, a meter shell 3, a dial 4, a pointer 5, a baton tube 6, a temperature compensation sheet 7 (the width is 5.5-18 mm), a wire holder 8, a plurality of (three are taken as examples in this case) micro switches 91, 92 and 93, a printed circuit board 10, a fixing plate 11, a signal adjusting mechanism 12, a plurality of adjusting screws 131, 132 and 133, a pull rod 14, a meter glass 15, a cover ring 16, a limiting mechanism 17, an end seat 18, a base 19, micro switch contact triggering elements 201, 202 and 203, a limiting part 21, a micro switch contact triggering element fixing part 22, an anti-misoperation mechanism 23, a shaft 26, an elastic part 27 and the like. Wherein the joint 1 is fixed on the watch case 3, the display machineThe core 2 is fixed to a base 19. One end of the bourdon tube 6 is welded to and communicates with the base 19, and the other end is welded to the end seat 18. And the end seat 18 is connected with one end of the temperature compensation sheet 7, and the other end of the temperature compensation sheet 7 is connected with the signal adjusting mechanism 12. Three adjusting screws 131, 132, 133 are fixed to the signal adjusting mechanism 12. The signal conditioning mechanism 12 is in turn connected to a link 15, which link 15 is in turn connected to the display movement 2. The three microswitches 91, 92, 93 are fixed to a printed circuit board 10, respectively, the printed circuit board 10 being fixed to a fixing plate 11, the fixing plate 11 being in turn mounted on the base 19. The microswitches 91, 92, 93 are all push-button microswitches with buttons 9101, 9201, 9301, respectively. Micro-switch contact activating elements that are independently movable along the axis 26 (261, 262, 263, respectively). The shafts 26 (261, 262, 263, respectively) are fixed to the fixing members 22, respectively. That is, the microswitch contact activating elements 201, 202, 203 are each secured to the fixed member 22 by a shaft 26 (261, 262, 263, respectively) which is machined, very round, fits very well, has a very small clearance, and prevents the microswitch contact activating elements 201, 202, 203 from wobbling. The fixing member 22 is fixed in the housing such that the microswitch contact activating elements 201, 202, 203 are fixed in the housing by the shaft 26. The micro-switch contact triggering elements 201, 202 and 203 are respectively arranged corresponding to the micro-switches 91, 92 and 93, namely the micro-switch contact triggering elements 201, 202 and 203 are respectively arranged corresponding to the buttons 9101, 9201 and 9301 of the micro-switches 91, 92 and 93, the micro-switch contact triggering elements 201, 202 and 203 are respectively arranged above the adjusting screws 131, 132 and 133, and the elastic pieces 27 (271, 272 and 273) are respectively arranged corresponding to the micro-switch contact triggering elements 201, 202 and 203, as shown in fig. 4, wherein the micro-switch contact triggering element 201 is fixed above the adjusting screw 131, the micro-switch contact triggering element 202 is fixed above the adjusting screw 132, and the micro-switch contact triggering element 203 is fixed above the adjusting screw 133. The limiting member 21 is fixed in the housing, and the limiting member 21 is disposed corresponding to the micro switch contact triggering elements 201, 202, 203. The pointer 5 and the dial 4 are fixed to the display movement 2, respectively. Signal contacts of microswitches, printed by electric wiresThe wiring board 10 is connected to the wiring holder 8, and the wiring holder 8 is fixed to the case 3. The watch glass 15 and the bezel 16 are fixed to the case 3, respectively, and protect the internal mechanism from mechanical damage and intrusion of dirt and rainwater. The limiting mechanism 17 is fixed in the shell, and a gap is reserved between the limiting mechanism 17 and the signal adjusting mechanism 12. The limiting mechanism 17 is used for preventing the signal adjusting mechanism 12 from generating excessive displacement along the axial direction thereof when the switch is switched on and off to generate vibration, preventing the adjusting screws 131, 132 and 133 from being clamped or separated from the micro-switch contact triggering elements 201, 202 and 203 and ensuring the reliable work of the system. In this embodiment, the microswitch contact triggering elements 201, 202, 203 are straight in shape; the relative positions of the microswitch contact triggering elements 201, 202 and 203 and the microswitches 91, 92 and 93 are horizontal; the temperature compensation element 7 is made of a bimetallic sheet material or is a gas-filled compensated bourdon tube. The gas density relay comprises a microswitch contact triggering element 20 which comprises a shaft 26 and moves along the shaft, one end of the microswitch contact triggering element is connected to the shaft 26, the other end of the microswitch contact triggering element is arranged corresponding to the button of the button type microswitch and is abutted against the button of each microswitch in a one-to-one correspondence manner, so that the shaft 26 is machined to be very round and well matched, the gap between the shafts is very small, and the microswitch contact triggering elements 201, 202 and 203 can be prevented from swinging. Through comparison and test, as can be seen from table 1, the contact precision and stability of the density relay adopting the technology of the patent have better performance than those of the density relay in the prior art, have prominent substantive characteristics and remarkable progress, can greatly improve the precision and stability of the microswitch type density relay, and ensure the reliable and safe operation of a power grid.
As can be known from Table 1, the density relay adopting the technology has the advantages of good contact precision and stability, high precision requirement and capability of improving the environmental adaptability of the density relay. At the same time, the key is that the stability is very good, and the precision can not be changed as soon as the vibration happens.
table 1 comparison table of contact performance of density relay of this patent technology and density relay of prior art
Microswitch contact triggering elements 201, 202, 203 are each connected to a shaft 26, which is connected to the fixing element 22. Alternatively, the microswitch contact triggering elements 201, 202, 203 are each fixed to a shaft 26, which is connected to the fixing element 22. The manner may be varied as long as a very good fit between the shafts is ensured, with a very small clearance, which avoids wobbling of the microswitch contact triggering elements 201, 202, 203.
in addition, the relay is also provided with an error-action-preventing mechanism 23, when the density relay is vibrated, the error-action-preventing mechanism 23 can limit the amplitude of the bourdon tube 6 and the signal regulating mechanism 12, thereby greatly improving the vibration resistance of the relay and ensuring the reliable operation of the system.
The utility model discloses high accuracy SF6The gas density relay has the action principle that the gas density relay is based on the elastic element Badon tube 6, and the temperature compensation sheet 7 is used for correcting the changed pressure and temperature so as to change the density of the reaction gas. I.e. in the medium under test (e.g. SF)6) Under the action of the pressure of the gas, the change of the density value and the corresponding change of the pressure value are realized by the action of the temperature compensation sheet 7, so that the tail end of the bourdon tube 6 is forced to generate corresponding elastic deformation-displacement, and the elastic deformation-displacement is transmitted to the display movement 2 by the temperature compensation sheet 7 and the connecting rod 15, and the display movement 2 is transmitted to the pointer 5, so that the measured gas density value is indicated on the dial 4. If air leaks, the density value of the air leakage is reduced to a certain degree (reaching an alarm or locking value), the Badon tube 6 generates corresponding downward displacement, the signal adjusting mechanism 12 is displaced downward through the temperature compensation sheet 7, the adjusting screws 131, 132 and 133 on the signal adjusting mechanism 12 gradually separate from the corresponding micro switch contact triggering elements 201, 202 and 203, the micro switch contact triggering elements 201, 202 and 203 gradually separate from the buttons 9101, 9201 and 9301 of the corresponding micro switches 91, 92 and 93, and when the air leakage reaches a certain degree, the air leakage is mutually oppositeThe corresponding micro-switches 91, 92 and 93 are connected to send out corresponding signals (alarm or locking) to monitor and control the gas density in the equipment such as the electrical switch and the like, so that the electrical equipment can work safely. If the density value is increased, the pressure value is correspondingly increased to a certain degree, the bourdon tube 6 is also correspondingly displaced upwards, the signal adjusting mechanism 12 is displaced upwards through the temperature compensation sheet 7, the adjusting screws 131, 132 and 133 on the signal adjusting mechanism 12 are displaced upwards, the corresponding micro switch contact triggering elements 201, 202 and 203 are pushed to be displaced upwards, the contacts of the micro switches 91, 92 and 93 are disconnected, and the signals (alarm or lock) are released. In a word, when the signal trigger mechanism generates displacement, the contact trigger element of the microswitch is also displaced by the elastic force of the elastic part 27, the elastic force of the button of the microswitch or the pushing force of the signal trigger mechanism, and when the set value is reached, the microswitch sends out a corresponding alarm or locking signal.
the micro switch and the adjusting screw are not limited to three, and can be one, two, four or more.
Fig. 5 is a schematic partial cross-sectional view of a sulfur hexafluoride gas density relay according to the second embodiment of the present invention, as shown in fig. 5 and fig. 6, the micro switch contact point trigger elements 201, 202, 203 are correspondingly disposed below the adjusting screws 131, 132, 133, that is, the micro switch contact point trigger element 201 is fixed below the adjusting screw 131, the micro switch contact point trigger element 202 is fixed below the adjusting screw 132, and the micro switch contact point trigger element 203 is fixed below the adjusting screw 133. The elastic members 27 (271, 272, 273, respectively) are provided corresponding to the microswitch contact activating elements 201, 202, 203, respectively, as shown in fig. 6. The limiting member 21 is fixed in the housing, and the limiting member 21 is disposed corresponding to the micro switch contact triggering elements 201, 202, 203. If the density value of the electrical equipment leaks air and is reduced to a certain degree (reaching an alarm or locking value), the bourdon tube 6 generates corresponding downward displacement, the signal adjusting mechanism 12 is displaced downward through the temperature compensation sheet 7, the adjusting screws 131, 132 and 133 on the signal adjusting mechanism 12 are close to the corresponding micro switch contact triggering elements 201, 202 and 203, the micro switch contact triggering elements 201, 202 and 203 are close to the buttons 9101, 9201 and 9301 of the corresponding micro switches 91, 92 and 93, and when the density value reaches a certain degree, the micro switch contact triggering elements 201, 202 and 203 respectively drive the corresponding micro switches 91, 92 and 93 to be connected to send corresponding signals (alarm or locking) so as to monitor and control the gas density in the equipment such as the electrical switches and the like, and the electrical equipment can work safely. If the density value is increased, the pressure value is correspondingly increased and is increased to a certain degree, the bourdon tube 6 is also correspondingly displaced upwards, the signal adjusting mechanism 12 is displaced upwards through the temperature compensation sheet 7, the adjusting screws 131, 132 and 133 on the signal adjusting mechanism 12 are displaced upwards, the corresponding micro switch contact triggering elements 201, 202 and 203 are displaced upwards under the action of the elastic force of the elastic piece 27 and the elastic force of the micro switch button, so that the contacts of the micro switches 91, 92 and 93 are disconnected, and the signals (alarm or lock) are released. Similarly, the limiting member 21 limits the movement of the adjusting screws 131, 132, 133 of the signal adjusting mechanism 12 within a certain range, so as to protect the microswitch contact triggering elements 201, 202, 203 from moving within the elastic range all the time, so that the microswitch contact triggering elements 201, 202, 203 do not have the problem of elastic failure within the certain stress range, thereby ensuring the realization of high precision and the long-term stability of contact precision. The effective width of the contact part of the front ends of the micro switch contact point trigger elements 201, 202 and 203 and the adjusting screws 131, 132 and 133 of the signal adjusting mechanism 12 is 4.0-18 mm, and the vibration resistance is improved.
Fig. 7 and 8 show high-precision SF of a third embodiment and a fourth embodiment of the present invention, respectively6In the microswitch signal configuration explanatory diagram of the gas density relay, as shown in fig. 7, the microswitch contact activating elements 201, 202 and 203 are bent in shape, and the relative positions of the microswitch contact activating elements 201, 202 and 203 and the microswitches 91, 92 and 93 are inclined. That is, the shape of the microswitch contact triggering element can be straight or bent, that is, the shape can be straight or bent at different angles.
FIG. 9 shows high-precision SF according to the fifth embodiment of the present invention6Micro-motion of gas density relayAs shown in fig. 8, when the gas density of the electric apparatus is normal, the push force of the adjusting screws 131, 132, 133 of the signal trigger mechanism 12 causes the micro switch contact point trigger elements 201, 202, 203 to press the buttons 9101, 9201, 9301 of the micro switches 91, 92, 93. When gas leaks, the signal trigger mechanism and the adjusting screw thereof generate displacement and are far away from the contact trigger element of the microswitch, and the contact trigger element of the microswitch is respectively dependent on the elastic force of the elastic piece or the elastic force of the button of the microswitch, so that the contact trigger element of the microswitch is far away from the buttons 9101, 9201 and 9301 of the microswitches 91, 92 and 93, and when a set value is reached, the microswitch sends out a corresponding alarm or locking signal.
FIG. 10 shows high-precision SF according to the sixth embodiment of the present invention6A schematic cross-sectional view of a gas density relay, such as the SF shown in FIG. 106The gas density relay comprises a relatively independent signal control part and a value display part; the signal control part comprises a control base 19, a control end seat 18A, a control bourdon tube 6A, a control temperature compensation element 7A, a signal adjusting mechanism 12 and a plurality of micro switches 91, 92 and 93 serving as signal generators; one end of the control bourdon tube 6A is connected to the control base 19, the other end of the control bourdon tube 6A is connected to one end of the control temperature compensation element 7A, and the other end of the control temperature compensation element 7A is connected to the signal adjusting mechanism 12. The micro switches 91, 92 and 93 are button type micro switches, the gas density relay further comprises micro switch contact triggering elements 201, 202 and 203 which comprise shafts and move along the shafts, one ends of the micro switch contact triggering elements 201, 202 and 203 are fixed on the shafts which can rotate flexibly and have small gaps in the shell, and the other ends of the micro switch contact triggering elements are arranged corresponding to the buttons of the button type micro switches 91, 92 and 93 and abut against the buttons of each micro switch in a one-to-one correspondence mode. When the gas density value changes, the control bourdon tube 6A and the control temperature compensation element 7A generate displacement, the displacement respectively drives the micro switch contact point trigger elements 201, 202 and 203 through the adjusting screws 131, 132 and 133 of the signal trigger mechanism 12 in sequence, the micro switch contact point trigger elements 201, 202 and 203 generate position change, and the micro switches 91, 92 and 93 respectively send out signalsAnd corresponding signals are used for completing the function of the gas density relay. The high-precision SF6The gas density relay includes a buffer balance mechanism 24, and the buffer balance mechanism 24 has a supporting function on the signal trigger mechanism 12, so that the vibration resistance level of the density relay is further improved. In addition, the high-precision SF6The gas density relay is adjustably provided with a limiting mechanism 25, the limiting mechanism 25 is provided with elasticity, the signal adjusting mechanism 12 is limited to a corresponding position which is set and is larger than the density alarm value, and the vibration resistance performance of the density relay can be further improved.
meanwhile, the high-precision relay of the embodiment further includes a relatively independent indication display portion, as shown in fig. 10, which includes a display bourdon tube 6B, a display temperature compensation element 7B, a display base 19, a display end seat 18B, a display movement 2, a dial, and a pointer 5. One end of the display bourdon tube 6B is connected to the display base 19, the other end is connected with one end of the display temperature compensation element 7B through the display end seat 18B, the other end of the display temperature compensation element 7B is connected with the display movement 2 through the display connecting rod 14 or the other end of the temperature compensation element 7B is directly connected with the display movement 2, and the pointer 5 is installed on the display movement 2 and is arranged in front of the dial for indicating the gas density value. The control base and the display base are integrated into a whole and can be separated.
Additionally, the utility model discloses a high accuracy SF6The gas density relay also comprises a pressure sensor, a temperature sensor, a signal processing unit and a signal transmission unit, and has a remote signal to realize the online density monitoring.
The utility model discloses a method for improving gas density relay precision, as shown in figure 2, figure 3, figure 4, this density relay includes: the gas density relay comprises a gas density relay shell 3, a base 19 arranged in the shell 3, an end seat 18, a bourdon tube 6, a temperature compensation element 7, a signal adjusting mechanism 12 and a plurality of micro switches 91, 92 and 93 serving as signal generators; one end of the bourdon tube 6 is connected to the base 19, the other end of the bourdon tube 6 is connected to the end seat 18, one end of the temperature compensation element 7 is connected to the end seat 18, and the other end of the temperature compensation element 7 is connected to the signal adjusting mechanism 12; the microswitches 91, 92 and 93 are button type microswitches; the gas density relay also comprises microswitch contact triggering elements 201, 202 and 203 which comprise a shaft 26 and move along the shaft, namely, one end of each microswitch contact triggering element 201, 202 and 203 is fixed on the shaft 26 which can rotate flexibly and has a very small gap in the shell through a fixing part 22, and the other end of each microswitch contact triggering element corresponds to the buttons 9101, 9201 and 9301 of the button type microswitch and is abutted against the buttons 9101, 9201 and 9301 of each microswitch in a one-to-one correspondence manner; when the gas density value changes, the bourdon tube 6 and the temperature compensation element 7 generate displacement, the displacement sequentially passes through the adjusting screws 131, 132 and 133 of the signal triggering mechanism 12, the adjusting screws 131, 132 and 133 respectively drive the micro switch contact point triggering elements 201, 202 and 203, the micro switch contact point triggering elements 201, 202 and 203 respectively generate position change, so that the micro switches 91, 92 and 93 send corresponding signals, and the function of a gas density relay is completed. That is, when the gas density of the electrical equipment is reduced, the barton tube 6 and the temperature compensation element 7 of the gas density relay generate displacement, the signal trigger mechanism 12 also generates displacement, at the moment, the micro switch contact point trigger elements 201, 202 and 203 also generate displacement, and when the micro switch 91, 92 and 93 generates corresponding signals to a certain degree. In short, when the signal trigger mechanism 12 is displaced, the micro switch contact triggering elements 201, 202 and 203 are displaced accordingly by the elastic force of the elastic member 27 and/or the pushing force of the adjusting screws 131, 132 and 133 of the signal trigger mechanism 12, so that the micro switch contact triggering elements 201, 202 and 203 are displaced accordingly, and when the set value is reached, the micro switch sends out a corresponding alarm or locking signal.
The utility model discloses an innovation point and nuclear core point are: because the micro switch contact triggering element comprises a shaft and moves along the shaft, one end of the micro switch contact triggering element is connected to the shaft, and the other end of the micro switch contact triggering element is arranged corresponding to the buttons of the button type micro switch and is abutted against the buttons of each micro switch in a one-to-one correspondence manner; the contact point trigger element of the microswitch leads the microswitch to send out corresponding alarm or close by the elasticity of the elastic piece or the thrust of the signal trigger mechanisma lock signal. And the microswitch contact triggering element one end is connected on the axle, this axle machining, very round, can cooperate very well, its interval is very little, has avoided rocking simultaneously, and then just can not cause the precision to become very poor, when vibrating or transporting, just can not influence the precision of density relay basically for the precision of density relay is very stable. Meanwhile, during debugging, the precision is very easy to be adjusted accurately, and a high-precision density relay is very easy to be manufactured. Meanwhile, as the microswitch is adopted as the signal generator of the density relay, the reliable conduction of the contact can be ensured, the reliable work of the system is ensured, the safe operation of the power grid is ensured, and the micro-switch can be well applied to SF6Etc. of the gas. Tests show that the technology has outstanding substantive characteristics and remarkable progress, can greatly improve the precision and stability of the microswitch type density relay, and ensures the reliable and safe operation of a power grid.
As shown in fig. 11, the microswitch contact activating element 20 is connected to a shaft 26 which is connected to a fixing 22. Alternatively, as shown in fig. 12, the microswitch contact activating element 20 is fixed to a shaft 26 which is connected to the fixing element 22. The manner can be varied as long as a very good fit between the shafts is ensured, with a very small clearance, which avoids wobbling of the microswitch contact triggering element 20. In addition, as shown in fig. 11, the height of the two side baffles at the front end of the micro-switch contact triggering element 20 is 2.6-18mm, the front end of the micro-switch contact triggering element 20 can be respectively provided with an end plate B, and the end plate B and the two side baffles C together form a semi-closed area which can limit the adjusting screw from separating from the micro-switch contact triggering element 20 at the front end of the micro-switch contact triggering element 20. After the measure is adopted, the utility model discloses a high accuracy SF6The gas density relay can avoid the displacement of the micro-switch contact triggering element and the adjusting screw when the switch is switched on and off to generate vibration, so that the adjusting screw cannot be clamped or separated from the micro-switch contact triggering element, and the reliable work of the system is ensured. The vibration resistance of the product is greatly improved. Meanwhile, the part of the front end of each micro-switch contact triggering element, which can be contacted with the adjusting screw, is set to be a rectangular flat plateThe width of the plate is 4.4-8mm, so that the phenomenon that the micro-switch contact triggering element and the adjusting screw are displaced and the adjusting screw is not clamped or separated from the micro-switch contact triggering element is avoided, the reliable work of the system is ensured, and the vibration resistance of the product is further improved.
In addition, the outside parcel of this density relay's casing can be equipped with the heat preservation, reduces the influence of the difference in temperature.
In addition, the following steps can be adopted: the tray is arranged at the rear part of the shell, a vibration-proof pad (such as a spring vibration-proof pad) is arranged between the tray and the shell, the movement can also be provided with a damping mechanism, or the movement of the indication value display part is a vibration-proof movement (specifically, the vibration-proof movement comprises a torsion spring), and the shell of the density relay is filled with measures such as vibration-proof oil and the like, so that the vibration-proof performance is improved.
The micro switch and the base are respectively positioned at two sides of the signal adjusting mechanism, namely the micro switch is respectively positioned above the signal adjusting mechanism corresponding to the micro switch; or the microswitch and the base are respectively positioned at one side of the signal adjusting mechanism, namely the microswitch is positioned below the corresponding signal adjusting mechanism.
The utility model discloses a high accuracy relay of technique can also include the hold mechanism after the signal action to and can also include hold mechanism and canceling release mechanical system after the signal action.
In conclusion, those skilled in the art should realize that the above embodiments are only used for illustrating the present invention, and not used as a limitation of the present invention, and that changes and modifications to the above embodiments are all within the scope of the claims of the present invention as long as they are within the spirit and scope of the present invention.

Claims (11)

1. High-precision SF6the gas density relay comprises a gas density relay shell, a base, an end seat, a Bardon tube, a temperature compensation element, a signal adjusting mechanism and a plurality of micro switches serving as signal generators, wherein the base, the end seat, the Bardon tube, the temperature compensation element and the signal adjusting mechanism are arranged in the shell; one end of the bourdon tube is connected to the base, the other end of the bourdon tube is connected to the end seat, and the temperature compensation deviceone end of the compensation element is connected to the end seat, and the other end of the temperature compensation element is connected with the signal adjusting mechanism; it is characterized in that the preparation method is characterized in that,
The microswitch is a button type microswitch;
The gas density relay also comprises a micro-switch contact triggering element, wherein one end of the micro-switch contact triggering element is provided with a fixed shaft, the micro-switch contact triggering element is fixed in the shell through the fixed shaft, the micro-switch contact triggering element can move relative to the micro-switch around the fixed shaft, and the other end of the micro-switch contact triggering element is arranged corresponding to the buttons of the button type micro-switch and is abutted against the buttons of each micro-switch in a one-to-one correspondence manner;
when the gas density value changes, the bourdon tube and the temperature compensation element generate displacement, the displacement drives the microswitch contact point trigger element sequentially through the signal trigger mechanism, and when the gas density value reaches a corresponding set value, the microswitch contact point trigger element presses or is far away from a button of the microswitch, so that the microswitch generates a corresponding signal, and the function of the gas density relay is completed.
2. High precision SF according to claim 16The gas density relay is characterized by further comprising a display core, a dial and a pointer, wherein one end of the temperature compensation element is connected with the display core through a display connecting rod or one end of the temperature compensation element is directly connected with the display core, and the pointer is installed on the display core and arranged before the dial.
3. High-precision SF6the gas density relay comprises a relatively independent signal control part and a value display part; the signal control part comprises a control base, a control end seat, a control bourdon tube, a control temperature compensation element, a signal adjusting mechanism and a plurality of micro switches serving as signal generators; one end of the control bourdon tube is connected to the control base, and the other end of the control bourdon tube is connected to the control baseone end of the control temperature compensation element is connected to the control end seat, and the other end of the control temperature compensation element is connected with the signal adjusting mechanism; it is characterized in that the preparation method is characterized in that,
The microswitch is a button type microswitch;
The gas density relay also comprises a micro-switch contact triggering element, wherein one end of the micro-switch contact triggering element is provided with a fixed shaft, the micro-switch contact triggering element is fixed in the shell through the fixed shaft, the micro-switch contact triggering element can move relative to the micro-switch around the fixed shaft, and the other end of the micro-switch contact triggering element is arranged corresponding to the buttons of the button type micro-switch and is abutted against the buttons of each micro-switch in a one-to-one correspondence manner;
When the gas density value changes, the bourdon tube and the temperature compensation element generate displacement, the displacement drives the microswitch contact point trigger element through the signal trigger mechanism in sequence, and when the gas density value reaches a corresponding set value, the microswitch contact point trigger element presses or is far away from a button of the microswitch, so that the microswitch generates a corresponding signal, and the function of a gas density relay is completed;
The indicating value display part comprises a display bourdon tube, a display temperature compensation element, a display base, a display end seat, a display core, a dial and a pointer, one end of the display bourdon tube is connected to the display base, the other end of the display bourdon tube is connected to the display end seat, one end of the display temperature compensation element is connected to the display end seat, the other end of the display temperature compensation element is connected to the display core or the other end of the temperature compensation element is directly connected to the display core, and the pointer is installed on the display core and is arranged in front of the dial.
4. High precision SF according to claim 1 or 36gas density relay, its characterized in that: the elastic piece is fixed in the shell and corresponds to the contact point trigger element of the microswitch.
5. High precision SF according to claim 1 or 36Gas density relay, its characterized in that: the signal adjusting mechanism is provided with an adjusting screw; the shape of the micro-switch contact point trigger element can be straight or bent; the relative position of the microswitch contact activating element and the microswitch can be horizontal or inclined.
6. High precision SF according to claim 1 or 36Gas density relay, its characterized in that: the limiting mechanism is further included, and when the density relay is vibrated, the limiting mechanism ensures that the signal adjusting mechanism moves within a normal working range.
7. High precision SF according to claim 1 or 36Gas density relay, its characterized in that: the effective width of the contact part of the front end of the micro-switch contact point trigger element and the signal adjusting mechanism is 4.0-18 mm.
8. High precision SF according to claim 1 or 36Gas density relay, its characterized in that: the limiting part limits the signal adjusting mechanism to move within a certain range, and protects the micro-switch contact triggering element from moving within a certain range all the time.
9. High precision SF according to claim 36Gas density relay, its characterized in that:
The buffer balance mechanism is used for improving the vibration resistance level of the density relay;
the temperature compensation element is a bimetallic strip or a gas-filled bourdon tube;
The signal control part is provided with a malfunction prevention mechanism.
10. High precision SF according to claim 1 or 36Gas density relay, its characterized in that:
and a limiting mechanism is also adjustably installed in the shell and limits the signal adjusting mechanism to a set corresponding position which is greater than the density alarm value.
11. High precision SF according to claim 16A gas density relay is characterized in that,
The gas density relay also comprises a pressure sensor, a temperature sensor, a signal processing unit and a signal transmission unit, and the signal transmission unit is provided with a remote transmission signal to realize the online density monitoring.
CN201821597213.7U 2018-09-28 2018-09-28 High-precision SF6Gas density relay Active CN209766320U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201821597213.7U CN209766320U (en) 2018-09-28 2018-09-28 High-precision SF6Gas density relay

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201821597213.7U CN209766320U (en) 2018-09-28 2018-09-28 High-precision SF6Gas density relay

Publications (1)

Publication Number Publication Date
CN209766320U true CN209766320U (en) 2019-12-10

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Application Number Title Priority Date Filing Date
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Country Link
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