SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a high anti vibration gas density relay can improve gas density relay's shock resistance to improve gas density relay's reliability.
In order to achieve the above object, the utility model provides a following scheme:
a high vibration resistant gas density relay connected to a gas insulated apparatus, the high vibration resistant gas density relay comprising: a shell, a first corrugated pipe, a second corrugated pipe, a microswitch, a spring and a signal adjusting mechanism, wherein,
a first opening end of the first corrugated pipe is fixed on the inner wall of the shell, the first corrugated pipe is communicated with insulating gas in the gas insulation equipment, and a second opening end of the first corrugated pipe is in sealing connection with a first sealing element; the inner wall of the first bellows, the first seal, the inner wall of the housing, and the gas-insulated apparatus collectively define a first sealed cavity;
the first opening end of the second corrugated pipe is connected with the first sealing element in a sealing mode, the second opening end of the second corrugated pipe is connected with the second sealing element in a sealing mode, the outer wall of the first corrugated pipe, the outer wall of the first sealing element, the outer wall of the second corrugated pipe, the second sealing element and the inner wall of the shell define a second sealing cavity together, and compensation gas is filled in the second sealing cavity;
the signal adjusting mechanism is connected with the first sealing piece, the micro switch corresponds to the signal adjusting mechanism, the first end of the spring is connected with the connecting portion of the signal adjusting mechanism and the first sealing piece, and the second end of the spring is fixed on the spring fixing seat.
Optionally, the extension part of the signal adjusting mechanism extends into the second bellows, wherein the extension part of the signal adjusting mechanism is an end part of the signal adjusting mechanism connected with the second bellows.
Optionally, the extension of the signal conditioning mechanism is connected to the first seal.
Optionally, the spring fixing seat is disposed between the second bellows and the microswitch.
Optionally, the gas density relay is further provided with a temperature sensing bulb, and the compensation gas is connected with the temperature sensing bulb through a connecting gas pipe.
Optionally, the gas density relay further comprises a pressure sensor and/or a temperature sensor disposed in the first sealed cavity.
Optionally, a display mechanism for displaying the density of the insulating gas in the gas insulating device is further disposed on the housing.
Optionally, the display mechanism specifically includes: the connecting mechanism, the movement, the dial and the pointer; wherein,
the movement passes through coupling mechanism with signal adjustment mechanism connects, the pointer install in on the movement and locate before the calibrated scale.
Optionally, the display mechanism specifically includes: the display device comprises a display bourdon tube, a temperature compensation element, a display end seat, a machine core, a dial, a pointer and a base; wherein,
one end of the display bourdon tube and one end of the temperature compensation element are both fixed on the display end base, the other end of the display bourdon tube is connected on the base, the other end of the temperature compensation element is connected with the movement, and the pointer is installed on the movement and is arranged in front of the dial.
Optionally, the gas density relay is further provided with a heat insulation layer wrapping the first sealed cavity and the second sealed cavity.
Optionally, the first sealing element is an integrated part or consists of split parts.
According to the utility model provides a concrete embodiment, the utility model discloses a following technological effect:
the utility model provides a gas density relay, the first end of spring is connected in the connecting portion of signal adjustment mechanism and second bellows, transmits the pressure variation that arouses the gas density change for the spring through first bellows and second bellows, and bellows mainly used transmission pressure wherein, and it is the spring really to carry out pressure measurement. Because the spring is small in size and good in stability, the vibration resistance of the gas density relay can be greatly improved.
Because the utility model discloses a dual bellows structural design, the contact debugging is very convenient, can satisfy the production demand of the density relay of various pressures. Moreover, the utility model provides a gas density relay has production convenience, and the cost of manufacture is low, and the monitoring precision is high, and electrical performance is good, and long service life can be at advantages such as work under the oil-free condition.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model aims at providing a high anti vibration gas density relay can improve gas density relay's shock resistance to improve gas density relay's reliability.
In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.
This embodiment uses sulfur hexafluoride gas density relay as an example, introduces the utility model provides a high anti vibration gas density relay's structure.
Fig. 2 is a schematic partial cross-sectional view of a sulfur hexafluoride gas density relay with high vibration resistance provided by an embodiment of the present invention. As shown in fig. 2, a high vibration-resistant gas density relay connected with a gas insulated apparatus, the high vibration-resistant gas density relay comprising: a shell 1, a first corrugated pipe 2, a second corrugated pipe 3, a microswitch 4, a signal adjusting mechanism 5 and a spring 6, wherein,
the shell 1 is provided with an opening, a first opening end of the first corrugated pipe 2 is fixed on the inner wall of the shell 1 through welding, the first corrugated pipe 2 is communicated with insulating gas in the gas insulating device 7 through the opening, and a second opening end of the first corrugated pipe 2 is connected with a first sealing element 8 in a sealing manner; the inner wall of the first bellows 2, the first seal 8, the inner wall of the housing 1 and the gas-insulated device 7 together define a first sealed chamber a 1;
the first opening end of the second bellows 3 is connected with the first sealing element 8 in a sealing manner, the second opening end of the second bellows 3 is connected with the second sealing element 9 in a sealing manner, the outer wall of the first bellows 2, the first sealing element 8, the outer wall of the second bellows 3, the second sealing element 9 and the inner wall of the housing 1 jointly define a second sealing cavity A2, and the second sealing cavity A2 is filled with compensation gas;
signal adjustment mechanism 5 with first sealing member 8 is connected, micro-gap switch 4 corresponds signal adjustment mechanism 5 sets up, the first end of spring 6 connect in signal adjustment mechanism 5 with the connecting portion of first sealing member 8 and second bellows 3, the second end of spring 6 pass through the spring regulating part connect in on the spring fixing base 10, wherein, the spring fixing base 10 sets up the second bellows 3 with between the micro-gap switch 4. In this embodiment, the signal adjusting mechanism 5 includes an adjusting screw 501, an adjusting rod 502, and a disc 503, wherein the adjusting screw 501 is disposed on the disc 503.
In this embodiment, an extension of the signal adjusting mechanism 5 extends into the second bellows 3 and is connected to the first sealing member 8, wherein the extension of the signal adjusting mechanism 5 is an end of the signal adjusting mechanism 5 connected to the second bellows 3. The spring fixing seat 10 is arranged between the second corrugated pipe 3 and the microswitch 4.
Further, the housing 1 of the gas relay provided in the present embodiment is also provided with a display mechanism 11 for displaying the density of the insulating gas in the gas insulating apparatus.
As shown in fig. 2, the display mechanism 11 specifically includes: connection 1101, movement 1102, dial 1103, and pointer 1104; wherein,
the movement 1102 is connected with the signal adjusting mechanism 5 through the connecting mechanism 1101, and the pointer 1104 is mounted on the movement 1102 and is arranged in front of the dial 1103.
Preferably, the gas density relay is further provided with a temperature sensing bulb, and the compensation gas is connected with the temperature sensing bulb through a connecting gas pipe, so that the gas density relay can be used in occasions where the temperature difference between the density relay and equipment is large. The gas density relay is also provided with an insulating layer 12 wrapping the first sealed cavity A1 and the second sealed cavity A2.
For on-line monitoring, the gas density relay is further provided with a pressure sensor and/or a temperature sensor, wherein,
the pressure sensor and the temperature sensor are both arranged in the first sealed cavity. The pressure sensor and/or the temperature sensor are/is connected with the signal processing unit, and the signal processing unit is connected with the signal transmission unit. Therefore, the gas density relay provided by the embodiment has a remote signal, and can realize online monitoring of density.
Further, the gas density relay provided in the present embodiment is further provided with a holding mechanism and a reset mechanism after signal operation.
Optionally, the first sealed cavity a1 and the second sealed cavity a2 may be formed in the following manner: both ends of the first corrugated pipe 2 are sealed to form a first sealed cavity A1, and the first sealed cavity A1 is filled with compensation gas. Two ends of the second corrugated pipe 3 are sealed to form a second sealed cavity A2, the outer wall of the first corrugated pipe 2, the outer wall of the second corrugated pipe 3 and the inner wall of the shell 1 define and form the second sealed cavity A2, and the second sealed cavity A2 is communicated with sulfur hexafluoride electrical equipment.
Optionally, the first sealing element 8 is an integrated part or is composed of a split part.
The utility model provides a high vibration resistance sulfur hexafluoride gas density relay's theory of operation does: after the adjustment screw 501 is adjusted, the sealed cavity a2 is sealed, typically by welding. Then the sealed cavity A2 is vacuumized, and compensation gas with corresponding pressure is filled in the sealed cavity A2 according to the parameters of rated pressure, alarm pressure, locking pressure and the like of the high-vibration-resistance sulfur hexafluoride gas density relay. The greater the density of chamber a2 and chamber a1 at the same ambient temperature, the greater the pressure. If no air leakage exists in SF6 (sulfur hexafluoride) electrical equipment, the high vibration resistance sulfur hexafluoride gas density relay does not send out an alarm locking signal; if the SF6 electrical equipment leaks air, when the density of SF6 gas in SF6 electrical equipment is close to or lower than the density of compensation gas in a sealed cavity A2, the high vibration resistance sulfur hexafluoride gas density relay sends out an alarm locking signal to ensure the safety of a power grid.
The specific process is as follows: density ρ of the sealed air cell A1 when the electric apparatus is normal1Greater than the density ρ of the sealed air cell A22I.e. p1>ρ2when the gas pressure P1 of the sealed air chamber a1 is greater than the pressure P2 of the sealed air chamber a2, i.e. the difference △ P between P1 and P2 is greater than a set value, it can be seen from fig. 2 that there is a corresponding distance L between the adjusting screw 501 and the microswitch 4, at which time the adjusting screw 501 of the signal adjusting mechanism 5 does not contact the microswitch 4, i.e. the microswitch 4 is not triggered, so that the microswitch 4 is not actuated, and its contact signal is not output, whereas, if the gas-insulated device leaks, the gas density value of the sealed air chamber a1 drops, the gas pressure value of the sealed air chamber a1 also drops, when its density value drops to a certain extent close to or below the gas density value of the sealed air chamber a2 (to reach an alarm or lockout value), i.e. when △ P is less than a set value, L in fig. 2 decreases, when L is less than a corresponding value, the adjusting screw 501 of the signal adjusting mechanism 5 contacts the microswitch 4, i.e. triggers the switch 4, so that the corresponding switch 4 is switched on, the contact, the corresponding switch, the alarm signal is sent out, when the gas pressure difference between the regulating mechanism is monitored by the high-pressure regulating rod a mechanical connection of the high-pressure regulating mechanism, etc. the high-regulating mechanism, the mechanical connection of the regulating mechanism is monitored by the high-pressure regulating mechanism, the mechanical mechanism, thus the mechanical mechanism, the mechanical mechanism.
Fig. 3 is a schematic partial cross-sectional view of a high vibration resistance wide-range gas density relay according to an embodiment of the present invention. As shown in fig. 3, in order to expand the range of the gas density relay, the display mechanism 11 in the present embodiment specifically includes: movement 1102, dial 1103, pointer 1104, display bourdon tube 1105, temperature compensation element 1106, display end socket 1107, and base 1108; wherein,
one end of the display bourdon tube 1105 and one end of the temperature compensation element 1106 are both fixed to the display end base 1107, the other end of the display bourdon tube 1105 is connected to the base 1108, the other end of the temperature compensation element 1106 is connected to the movement 1102 through a link or the other end of the temperature compensation element 1106 is directly connected to the movement 1102, and the pointer 1104 is installed on the movement 1102 and is arranged in front of the dial 1103. The base 1108 is in gas path communication with the gas-insulated device 7.
The high-vibration-resistance gas density relay shown in fig. 3 can very easily realize the full-range (-0.1-0.9 MPa), especially can very easily realize the display of initial-0.1 MPa, can display the vacuum degree during vacuum pumping, and is convenient for popularization and application.
The gas density relay provided by the embodiment can be suitable for all insulating gases such as sulfur hexafluoride mixed gas, nitrogen, dry air and compressed air besides sulfur hexafluoride gas, and can monitor the density of all insulating gases such as sulfur hexafluoride gas, sulfur hexafluoride mixed gas, nitrogen, dry air and compressed air.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principle and the implementation of the present invention are explained herein by using specific examples, and the above description of the embodiments is only used to help understand the method and the core idea of the present invention; meanwhile, for the general technical personnel in the field, according to the idea of the present invention, there are changes in the concrete implementation and the application scope. In summary, the content of the present specification should not be construed as a limitation of the present invention.