CN111579151A - Rain-proof cover of SF6 manometer - Google Patents
Rain-proof cover of SF6 manometer Download PDFInfo
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- CN111579151A CN111579151A CN202010437520.4A CN202010437520A CN111579151A CN 111579151 A CN111579151 A CN 111579151A CN 202010437520 A CN202010437520 A CN 202010437520A CN 111579151 A CN111579151 A CN 111579151A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/14—Housings
- G01L19/141—Monolithic housings, e.g. molded or one-piece housings
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L19/00—Details of, or accessories for, apparatus for measuring steady or quasi-steady pressure of a fluent medium insofar as such details or accessories are not special to particular types of pressure gauges
- G01L19/08—Means for indicating or recording, e.g. for remote indication
- G01L19/10—Means for indicating or recording, e.g. for remote indication mechanical
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- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a rain cover of an SF6 pressure gauge, which comprises a rain cover main body and a safety indicator, wherein a cavity for accommodating an SF6 pressure gauge is arranged in the rain cover main body, a through hole is formed in one side of the rain cover main body in a penetrating manner and is used for penetrating through a pipeline and a connecting line which are connected with the SF6 pressure gauge, the safety indicator is positioned on one side face, opposite to the SF6 pressure gauge, of the rain cover main body, the safety indicator comprises a first safety indicator and a second safety indicator connected with the first safety indicator, the first safety indicator corresponds to the position of the minimum safety air pressure value on a dial plate of the SF6 pressure gauge, and the second safety indicator corresponds to the position of the maximum safety air pressure value on the dial plate of the SF6 pressure gauge. It can protect the SF6 manometer, and make things convenient for the tour personnel to inspect the SF6 manometer.
Description
Technical Field
The invention relates to the technical field of electric power, in particular to a rainproof cover of an SF6 pressure gauge.
Background
The equipment such as a circuit breaker, GIS equipment and a current transformer of a transformer substation mostly adopts SF6 gas with certain pressure as an insulating medium, and the pressure in the equipment is monitored by an SF6 pressure gauge so as to ensure the normal operation of the equipment. The SF6 pressure gauge is a precise part, and is easy to age under the influence of factors of conditions such as rain, light, heat and the like, so that the air tightness of the SF6 pressure gauge is reduced or the water is wetted, and the SF6 pressure gauge cannot accurately detect the SF6 air pressure in the equipment. In addition, because the dial plate of the SF6 pressure gauge is less, the mounted position of the SF6 pressure gauge is higher, the reading is inconvenient, and the dial plate of the SF6 pressure gauge exposed in the air is easily stained, and the inspection of a patrol staff is influenced.
Disclosure of Invention
The invention aims to: the utility model provides a rain-proof cover of SF6 manometer, it can protect SF6 manometer, and makes things convenient for the tour personnel to look over the SF6 manometer.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a rain-proof cover of SF6 manometer, including rain-proof cover main part and safety pointer, the inside of rain-proof cover main part has the cavity that is used for holding SF6 manometer, one side of rain-proof cover main part is run through and is seted up the through-hole, the through-hole be used for pass with pipeline and connecting wire that SF6 manometer is connected, safety pointer is located rain-proof cover main part is just right a side of SF6 manometer, safety pointer includes first safety pointer and the second safety pointer that is connected with first safety pointer, first safety pointer with minimum safe atmospheric pressure value position corresponds on the dial plate of SF6 manometer, second safety pointer with maximum safe atmospheric pressure value position corresponds on the dial plate of SF6 manometer.
As an optimal technical scheme of rain-proof cover of SF6 manometer, rain-proof cover main part comprises roof, bottom plate, backplate, front panel and two curb plates, the roof has the protruding arc structure of establishing of one side of keeping away from the bottom plate of orientation, and is located the top of bottom plate, the backplate the front panel with the curb plate all is located the roof with between the bottom plate, two the curb plate sets up respectively the backplate with between the front panel.
As an optimal technical scheme of the rain cover of the SF6 pressure gauge, the front panel is opposite to the dial plate of the SF6 pressure gauge, the first safety indicator and the second safety indicator are arranged on the front panel, and the front panel is made of transparent materials.
As an optimal technical scheme of the rain cover of the SF6 pressure gauge, one end of the top plate, which is far away from the back plate, and one end of the side plate, which is far away from the back plate, both protrude out of one side of the front panel, which is far away from the cavity, and form a protruding part.
As an optimal technical scheme of rain-proof cover of SF6 manometer, rain-proof cover main part pass through the connecting piece with the SF6 manometer is connected, the connecting piece is the clamp, the clamp is connected with the roof, the clamp chucking is in the dial plate periphery of SF6 manometer.
As an optimal technical scheme of a rain cover of the SF6 pressure gauge, a temperature and humidity sensor and a heater connected with the temperature and humidity sensor are arranged in a cavity of a main body of the rain cover, and the temperature and humidity sensor or the heater is connected with an external power supply through a power line.
As a preferable technical scheme of the rain cover of the SF6 pressure gauge, a ventilation groove is concavely arranged on one side of the front panel, which is away from the cavity, a plurality of ventilation holes communicated with the inside of the rain cover main body are arranged at the bottom of the ventilation groove, and a sealing cover is arranged at the opening end of the ventilation groove and used for selectively sealing the opening of the ventilation groove.
As a preferable technical scheme of the rain cover of the SF6 pressure gauge, the heater is arranged on the inner side surface of the top plate and is of an arc-shaped structure.
As an optimal technical scheme of the rain cover of the SF6 pressure gauge, the top plate, the bottom plate and the side plates are all stainless steel plates, and heat insulation layers are coated on one side faces of the top plate, the bottom plate and the side plates, which are deviated from the interior of the main body of the rain cover.
As a preferable technical scheme of the rain cover of the SF6 pressure gauge, an illuminating lamp is arranged on the inner side of the front panel and used for illuminating a dial plate of the SF6 pressure gauge.
The invention has the beneficial effects that: the rain-proof cover of this kind of structure sets up the SF6 manometer in rain-proof cover main part, prevents that the SF6 manometer from drenching by the rainwater, has protected the SF6 manometer effectively. In addition, through setting up safe pointer, the personnel of patrolling need not carry out accurate reading at every turn, can judge fast whether normal, the convenient maintenance of the inside SF6 atmospheric pressure value of equipment.
Drawings
The invention is explained in more detail below with reference to the figures and examples.
Fig. 1 is a schematic structural diagram of a rain cover of an SF6 pressure gauge according to an embodiment.
Fig. 2 is a schematic structural diagram of a rain cover of an SF6 pressure gauge according to another embodiment.
In the figure:
1. a top plate; 2. a base plate; 3. a back plate; 4. a side plate; 5. a front panel; 6. a first safety indicator needle; 7. a second safety indicator needle; 8. clamping a hoop; 9. a temperature and humidity sensor; 10. a heater; 11. a through hole; 12. a ventilation groove; 13. air holes are formed; 14. and (7) sealing the cover.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
As shown in fig. 1 to 2, the invention provides a rain cover of an SF6 pressure gauge, which comprises a rain cover main body and a safety indicator, wherein a cavity for accommodating an SF6 pressure gauge is arranged in the rain cover main body, a through hole 11 is formed in one side of the rain cover main body in a penetrating manner, and the through hole 11 is used for penetrating through a pipeline and a connecting line connected with the SF6 pressure gauge. The safety indicator is located the rain-proof cover main part is just right a side of SF6 manometer, the safety indicator includes first safety indicator 6 and the second safety indicator 7 that is connected with first safety indicator 6. The first safety indicator 6 corresponds to the position of the minimum safe air pressure value on the dial plate of the SF6 pressure gauge, and the second safety indicator 7 corresponds to the position of the maximum safe air pressure value on the dial plate of the SF6 pressure gauge.
Set up the SF6 manometer in rain-proof cover main part, prevent that the SF6 manometer from the rainwater drenching, protected the SF6 manometer effectively. Because the first safety indicator 6 corresponds to the position of the minimum safe air pressure value on the dial plate of the SF6 pressure gauge, and the second safety indicator 7 corresponds to the position of the maximum safe air pressure value on the dial plate of the SF6 pressure gauge, the rain cover with the structure can indicate that the SF6 air pressure value inside the equipment is in a safe range if a patrolman observes that the reading pointer of the SF6 pressure gauge is positioned between the first safety indicator 6 and the second safety indicator 7 outside the rain cover main body; if the patrolman observes that the reading pointer of the SF6 pressure gauge is not between the first safety indicator 6 and the second safety indicator 7 and the reading pointer of the SF6 pressure gauge is close to the first safety indicator 6 outside the rain-proof cover main body, the SF6 pressure value inside the equipment is low; if the patrolling personnel observe that the reading pointer of the SF6 pressure gauge is not between the first safety indicator 6 and the second safety indicator 7 outside the rain-proof cover main body, and the reading pointer of the SF6 pressure gauge is close to the second safety indicator 7, the SF6 pressure value inside the equipment is higher. The rain-proof cover of this kind of structure, the personnel of patrolling need not carry out accurate reading at every turn, can the inside SF6 atmospheric pressure value of rapid judgement equipment whether normal, convenient maintenance.
In this embodiment, the first safety indicator 6 and the second safety indicator 7 are arranged at an acute angle. In other embodiments, the included angle between the first safety indicator 6 and the second safety indicator 7 may be flexibly set according to needs, and the included angle between the first safety indicator 6 and the second safety indicator 7 is not specifically limited herein.
In this specification, the position of the minimum safe air pressure value on the dial of the SF6 pressure gauge refers to the position of the reading pointer on the dial of the SF6 pressure gauge when the SF6 air pressure value inside the equipment is at the minimum safe air pressure, and the position of the maximum safe air pressure value on the dial of the SF6 pressure gauge refers to the position of the reading pointer on the dial of the SF6 pressure gauge when the SF6 air pressure value inside the equipment is at the maximum safe air pressure. Specifically, the minimum safe air pressure value and the maximum safe air pressure value of the SF6 in different specific devices vary, and the minimum safe air pressure value and the maximum safe air pressure value of the SF6 of each device are not the same.
In practical design, the first safety indicator 6 and the second safety indicator 7 may be set to different colors for easy distinction, for example, the first safety indicator 6 is set to red, and the second safety indicator 7 is set to green, but in other embodiments, the colors of the first safety indicator 6 and the second safety indicator 7 may also be flexibly designed as required, and the colors of the first safety indicator 6 and the second safety indicator 7 are not specifically limited herein.
Wherein, rain-proof cover main part comprises roof 1, bottom plate 2, backplate 3, front panel 5 and two curb plates 4, roof 1 has the protruding arc structure of establishing of one side of keeping away from bottom plate 2 towards, and is located the top of bottom plate 2, backplate 3 front panel 5 with curb plate 4 all is located roof 1 with between the bottom plate 2, two curb plate 4 sets up respectively backplate 3 with between the front panel 5. Set up roof 1 into the arc structure, prevent that the rainwater from piling up at the top of rain-proof cover main part.
The front panel 5 is right opposite to a dial plate of the SF6 pressure gauge, the first safety indicator 6 and the second safety indicator 7 are arranged on the front panel 5, and the front panel 5 is made of transparent materials. Specifically, the front panel 5 is a transparent glass plate or a transparent plastic plate. Adopt the front panel 5 that transparent front panel 5 material was made, can follow the outside direct observation of rain-proof cover main part and cover the reading pointer of the inside SF6 manometer of main part.
In order to facilitate reading of the reading on the dial plate of the SF6 pressure gauge at the periphery of the protective cover main body, the front panel 5 can be set to be a magnifying glass, and the scales on the dial plate of the SF6 pressure gauge can be magnified by the front panel 5.
Preferably, first safety pointer 6 and second safety pointer 7 all set up front panel 5 is located the inboard of cavity, this kind of design avoids the safety pointer to expose in rain-proof cover main part, reduces the influence of external environment to the safety pointer, plays rain-proof, dirt-proof effect to the safety pointer, in addition, can also prevent to miss first safety pointer 6 and second safety pointer 7.
In a preferred embodiment, the surfaces of the first safety indicator 6 and the second safety indicator 7 are coated with a noctilucent layer, so that a cruise person can conveniently judge whether the reading on the SF6 pressure gauge is in a safe range in a dark environment.
In another embodiment, a first baffle is arranged between the first safety indicator 6 and the dial plate of the SF6 pressure gauge, the first baffle corresponds to the position of the minimum safe air pressure value on the dial plate of the SF6 pressure gauge, a second baffle is arranged between the second safety indicator 7 and the dial plate of the SF6 pressure gauge, the second baffle corresponds to the position of the maximum safe air pressure value on the dial plate of the SF6 pressure gauge, and the first baffle and the second baffle are both made of non-transparent materials. When a patrol person stands at a position inclined with the front panel 5 to watch the dial plate of the SF6 pressure gauge, the sight line can be partially shielded by the first baffle plate and the second baffle plate respectively, and whether the SF6 air pressure value inside the equipment is normal or not can be accurately judged without facing the front panel 5.
One end of the top plate 1, which is far away from the back plate 3, and one end of the side plate 4, which is far away from the back plate 3, are both protruded out of one side of the front panel 5, which is far away from the cavity, and form a protruding part. Due to the existence of the convex parts, on one hand, rainwater can be prevented from flowing onto the front panel 5 from the end parts of the top plate 1 and the side plates 4, and water seepage from gaps between the front panel 5 and the side plates 4, between the front panel 5 and the top plate 1 and between the front panel 5 and the bottom plate 2 is avoided; on the other hand, the convex parts above and at both ends of the front panel 5 can be used to block sunlight and dust, slow down the aging speed of the front panel 5 and reduce the possibility of stains appearing on the front panel 5.
In this embodiment, the distance between the end of the protruding portion far from the front panel 5 and the front panel 5 (i.e. the length of the protruding portion) is 2-15cm, but in other embodiments, the distance between the end of the protruding portion far from the front panel 5 and the front panel 5 may be flexibly set according to the requirement.
Rain-proof cover main part pass through the connecting piece with the SF6 manometer is connected, the connecting piece is clamp 8, clamp 8 is connected with roof 1, the chucking of clamp 8 is in the dial plate periphery of SF6 manometer.
Specifically, clamp 8 is located the radial direction of the dial plate of SF6 pressure gauge, with clamp 8 chucking in the dial plate periphery of SF6 pressure gauge, can restrict the inside removal of SF6 pressure gauge at rain-proof cover main part. Wherein, the clamp 8 is adhered with the top plate 1 through adhesive.
The clamp 8 can adopt elastic material to make, for example, the clamp 8 material adopts the rubber materials that has elastic stretching to make, the clamp 8 that this kind of material was made, can change the size in the chucking hole of clamp 8 in a flexible way on the one hand, make things convenient for the dismouting of clamp 8, on the other hand, because rubber has elastic stretching's characteristics, can stretch clamp 8 along the axial direction of clamp 8, change the area of the dial plate of clamp 8 parcel SF6 manometer in a flexible way, and can also be applicable to the SF6 manometer of not unidimensional.
A temperature and humidity sensor 9 and a heater 10 connected with the temperature and humidity sensor 9 are arranged in a cavity of the rain cover main body, and the temperature and humidity sensor 9 or the heater 10 is connected with an external power supply through a power line. Temperature and humidity inductor 9 is used for detecting the inside temperature and humidity of rain-proof cover main part, and when the inside humidity height 80% of rain-proof cover main part and the inside temperature of rain-proof cover main part were less than 45, temperature and humidity inductor 9 and heater 10 started simultaneously, dispel the inside moisture of rain-proof cover main part, prevent that SF6 manometer from weing.
Wherein, the power cord passes through-hole 11 in the rain-proof cover main part by the outside of rain-proof cover main part, and then enters into in the cavity.
In another embodiment, a ventilation groove 12 is concavely arranged on the front panel 5, a plurality of ventilation holes 13 communicated with the interior of the rain-proof cover main body are arranged at the bottom of the ventilation groove 12, a sealing cover 14 is arranged at the opening of the ventilation groove 12, and the sealing cover 14 is used for selectively sealing the opening of the ventilation groove 12. When the inside moisture of rain-proof cover main part is dispelled to needs, can open closing cap 14, accelerate the inside moisture of rain-proof cover main part through bleeder vent 13 and discharge outside speed, when the inside moisture of rain-proof cover main part need not be dispelled, establish the opening at ventilative groove 12 with closing cap 14 lid, prevent that steam from entering into in the rain-proof cover main part from bleeder vent 13.
Preferably, sealing rings are arranged on the periphery of the cover plate and on the wall of the ventilation groove 12, and the sealing performance between the cover plate and the ventilation groove 12 is enhanced by the sealing rings.
The heater 10 is arranged on the inner side surface of the top plate 1, and the heater 10 is of an arc-shaped structure. Set up heater 10 into the arc structure for the structure of heater 10 suits with the structure of roof 1, is favorable to optimizing the inside space of rain-proof cover main part. Specifically, the heater 10 may be a resistive heating sheet or a resistive heating wire. In this embodiment, the temperature and humidity sensor 9 is mounted on the back plate 3, but in other embodiments, the temperature and humidity sensor 9 may be mounted on any one of the bottom plate 2, the top plate 1, the side plate 4, and the front plate 5.
The top plate 1, the bottom plate 2 and the side plates 4 are all stainless steel plates, and heat insulation layers are coated on one side faces of the top plate 1, the bottom plate 2 and the side plates 4, which face away from the interior of the rain cover main body. The rain cover main body made of stainless steel has the characteristics of light weight, corrosion resistance and convenience in use. Through setting up the insulating layer, play certain guard action to corrosion resistant plate, avoid rain-proof cover high temperature main part inside to produce high temperature and cause the unstable phenomenon of SF6 manometer.
The inside of front panel 5 is provided with the light, the light is used for lightening the dial plate of SF6 manometer. Can illuminate the dial plate of SF6 manometer through the light under dim environment of light, because front panel 5 is transparent, consequently can be in the outside direct observation of rain-proof cover main part the reading pointer of SF6 manometer, need not use extra illuminating tool can accomplish the inspection to SF6 manometer in dim environment.
Preferably, the outside of protection casing main part is provided with the control switch who is connected with the light, opens the light through control switch selectivity, facilitates the use and is favorable to the energy saving.
Further, control switch is photosensitive switch, and when light was not enough, photosensitive switch automatic control light opened, and under the sufficient circumstances of light, photosensitive switch automatic control light extinguished, was favorable to the energy saving.
In the description herein, it is to be understood that the terms "upper," "lower," "left," "right," and the like are based on the orientation or positional relationship shown in the drawings for convenience in description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.
In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be appropriately combined to form other embodiments as will be appreciated by those skilled in the art.
The technical principle of the present invention is described above in connection with specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive effort, which would fall within the scope of the present invention.
Claims (10)
1. The utility model provides a rain-proof cover of SF6 manometer, its characterized in that, including rain-proof cover main part and safety pointer, the inside of rain-proof cover main part has the cavity that is used for holding SF6 manometer, one side of rain-proof cover main part is run through and is seted up the through-hole, the through-hole be used for pass with pipeline and connecting wire that SF6 manometer is connected, safety pointer is located rain-proof cover main part is just right a side of SF6 manometer, safety pointer includes first safety pointer and the second safety pointer that is connected with first safety pointer, first safety pointer with minimum safe atmospheric pressure value position corresponds on the dial plate of SF6 manometer, second safety pointer with maximum safe atmospheric pressure value position corresponds on the dial plate of SF6 manometer.
2. The rain cover of the SF6 pressure gauge of claim 1, wherein the rain cover body comprises a top plate, a bottom plate, a back plate, a front plate and two side plates, the top plate has an arc structure protruding towards a side away from the bottom plate and is located above the bottom plate, the back plate, the front plate and the side plates are located between the top plate and the bottom plate, and the two side plates are respectively located between the back plate and the front plate.
3. The rain cover of the SF6 pressure gauge of claim 2, wherein the front plate is directly opposite to the face plate of the SF6 pressure gauge, the first safety indicator and the second safety indicator are both disposed on the front plate, and the front plate is made of a transparent material.
4. The rain cover of an SF6 pressure gauge of claim 3, wherein an end of the top plate distal from the back plate and an end of the side plate distal from the back plate both protrude from a side of the front plate distal from the cavity and form a protrusion.
5. The rain cover of SF6 pressure gauge of claim 2, wherein the rain cover body is connected to the SF6 pressure gauge through a connector, the connector is a clamp, the clamp is connected to a top plate, and the clamp is clamped on the periphery of a dial plate of the SF6 pressure gauge.
6. The rain cover of an SF6 pressure gauge according to claim 2, wherein a temperature and humidity sensor and a heater connected to the temperature and humidity sensor are disposed in a cavity of the rain cover body, and the temperature and humidity sensor or the heater is connected to an external power source through a power line.
7. The rain cover of the SF6 pressure gauge of claim 6, wherein a ventilation slot is concavely formed on a side of the front panel facing away from the cavity, a plurality of ventilation holes communicated with the interior of the rain cover body are formed in a slot bottom of the ventilation slot, and a sealing cover is arranged at an opening end of the ventilation slot and used for selectively sealing the opening of the ventilation slot.
8. The rain cover of an SF6 pressure gauge of claim 6, wherein the heater is disposed on an interior side of the top plate, the heater having an arcuate configuration.
9. The rain cover of an SF6 pressure gauge according to claim 2, wherein the top plate, bottom plate and side plate are stainless steel plates and a side of the top plate, bottom plate and side plate facing away from the interior of the rain cover body is coated with a thermal insulation layer.
10. The rain cover for an SF6 pressure gauge as set forth in claim 3, wherein an illumination lamp is disposed on an inner side of said front panel for illuminating a dial of said SF6 pressure gauge.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010437520.4A CN111579151A (en) | 2020-05-21 | 2020-05-21 | Rain-proof cover of SF6 manometer |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010437520.4A CN111579151A (en) | 2020-05-21 | 2020-05-21 | Rain-proof cover of SF6 manometer |
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| CN111579151A true CN111579151A (en) | 2020-08-25 |
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| CN202010437520.4A Pending CN111579151A (en) | 2020-05-21 | 2020-05-21 | Rain-proof cover of SF6 manometer |
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| CN107437455A (en) * | 2017-08-02 | 2017-12-05 | 国家电网公司 | Pressure-relief valve for transformer rain cover and method |
| CN107560783A (en) * | 2017-08-08 | 2018-01-09 | 国网福建省电力有限公司 | A kind of SF6 pressure gauges for power system |
| CN210090240U (en) * | 2019-06-14 | 2020-02-18 | 广东电网有限责任公司 | SF6 gas density meter rainproof cover |
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Application publication date: 20200825 |
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