CN111721468A - Protective cover - Google Patents
Protective cover Download PDFInfo
- Publication number
- CN111721468A CN111721468A CN202010543494.3A CN202010543494A CN111721468A CN 111721468 A CN111721468 A CN 111721468A CN 202010543494 A CN202010543494 A CN 202010543494A CN 111721468 A CN111721468 A CN 111721468A
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- China
- Prior art keywords
- opening
- pressure gauge
- cover
- cover body
- protective cover
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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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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Fluid Pressure (AREA)
Abstract
The invention discloses a protective cover, which belongs to the technical field of instruments and meters and comprises a cover body, an observation window, a sun-shading cover and a locking assembly. The cover body is provided with an accommodating cavity, the front surface of the cover body is provided with a first opening, the bottom end of the cover body is provided with a second opening, the first opening and the second opening are communicated with the accommodating cavity, the neck of the pressure gauge can penetrate through the second opening, the pressure gauge and the wiring assembly can be accommodated in the accommodating cavity, the observation window covers the first opening, the sun-shading cover is rotatably arranged on the cover body and can cover the surface of the observation window, and the locking assembly is arranged on the cover body and can clamp and fix the neck of the pressure gauge. The protective cover can coat the pressure gauge and the wiring assembly in an all-around manner, can effectively prevent sunlight and rain, ensures the normal operation of the pressure gauge, and prolongs the service life of the pressure gauge and the wiring assembly.
Description
Technical Field
The invention relates to the technical field of instruments and meters, in particular to a protective cover.
Background
SF6Gases are widely used in substation equipment due to their good insulating and arc extinguishing properties. GIS (gas insulated switchgear) is an English abbreviation of gas insulated fully-enclosed combined electrical apparatus, and comprises a circuit breaker, a disconnecting switch, a grounding switch, a mutual inductor, a lightning arrester, a bus, a connecting piece, an outgoing line terminal and the like, wherein the devices or components are all enclosed in a metal grounded shell, and SF with certain pressure is filled in the metal grounded shell6Insulating gas, hence the name SF6A totally-enclosed combined electrical apparatus. To monitor SF6Gas pressure, judging SF6Whether gas leaks and an alarm or locking signal is generated, and each gas chamber on the GIS equipment is provided with SF6And a pressure gauge. Therefore, SF is made for outdoor GIS electrical equipment6The rainproof and sun-proof measures of the pressure gauge are very important for ensuring the normal operation of the pressure gauge.
(one) present transformer substation is in the aspect of the rain-proof measure of manometer: generally, a measure of additionally arranging a rain cover is adopted to reduce the erosion of rainwater to the pressure gauge. The protection cover only emphasizes that the pressure gauge body is rainproof, and does not cover the front surface of the pressure gauge body and the secondary junction box, so that the front surface of the pressure gauge body, the secondary junction box and the interface are exposed to the rain environment for a long time to operate. (II) the current transformer substation is in the aspect of the sun-proof measure of the pressure gauge: measures are not specially taken for the sun protection of the pressure gauge. Although the rain-proof cover of installing additional can prevent to a certain extent that the sunlight from to manometer side and sheltering from behind, nevertheless shelter from the effect not good, rain-proof cover is positive also not play sun-proof effect to the manometer simultaneously.
Disclosure of Invention
The invention provides a protective cover, which solves the technical problem that the existing protective cover of a pressure gauge in a transformer substation can only realize the rainproof effect of part of the structure of the pressure gauge, and the pressure gauge is corroded to be damaged due to the fact that the front surface of the pressure gauge, a secondary junction box and other structures are exposed, so that the pressure gauge and a wiring assembly can be protected in an all-round mode.
In order to achieve the purpose, the invention adopts the following technical scheme:
a protective cover for covering a pressure gage and wiring assembly, comprising:
the pressure gauge and the wiring assembly can be accommodated in the accommodating cavity, the first opening is over against a dial plate of the pressure gauge, and a neck of the pressure gauge can penetrate through the second opening;
an observation window covering the first opening;
the sun-shading cover is rotatably arranged on the cover body and can cover the surface of the observation window;
the locking assembly is arranged on the cover body and can clamp and fix the neck of the pressure gauge.
Optionally, the cover body includes a main body portion and an attachment portion connected to each other, the first opening is opened in the main body portion, a first accommodating space is formed in the main body portion, a second accommodating space is formed in the attachment portion, the first accommodating space is communicated with the second accommodating space to form the accommodating cavity, the pressure gauge is accommodated in the first accommodating space, and the wiring assembly is accommodated in the second accommodating space.
Optionally, the top end of the main body portion is an arch structure.
Optionally, the cover body is provided with a receiving groove, the locking assembly is received in the receiving groove, and an opening of the receiving groove faces the front surface.
Optionally, the locking assembly includes two buckles connected to each other, the two buckles are arranged in an axisymmetrical manner, a groove is formed in the inner side of each buckle, the two grooves are butted to form a channel, the channel faces the second opening, and the channel can clamp the neck of the pressure gauge.
Optionally, each of the clips includes a base block, and a first protrusion and a second protrusion connected to the base block, the second protrusion is located at an end of the base block and spaced apart from the first protrusion, and the base block, the first protrusion, and the second protrusion located between the first protrusion and the second protrusion enclose the groove.
Optionally, each second protrusion includes a first connecting plate and a second connecting plate which are connected at an angle, an end of one end of the second connecting plate is connected to an end of the base block, an end of the other end of the second connecting plate is connected to the first connecting plate, the second connecting plate is a groove wall of the groove, the first connecting plate is provided with mounting holes, and when the two buckles are in butt joint, the first connecting piece penetrates through the two mounting holes at the same time.
Optionally, an internal threaded hole is formed in one end of each base block, two through holes are formed in the back face of the cover body, the two through holes are opposite to the two internal threaded holes one by one, and a second connecting piece is screwed in each group of opposite through holes and the internal threaded holes.
Optionally, a fixing shaft is arranged at the edge of the first opening, a connecting through hole is formed in the sunshade cover, the fixing shaft penetrates through the connecting through hole, and the sunshade cover can rotate around the fixing shaft.
Optionally, the cover body is made of a zinc-aluminum alloy plated sheet.
The invention has the beneficial effects that:
the invention provides a protective cover which is provided with an observation window so that an operator can conveniently check and record the readings of a pressure gauge, and a sun-shading cover can cover the observation window so as to prevent sunlight from exposing the front surface of the pressure gauge and prolong the service life of the pressure gauge. The protective cover can coat the pressure gauge and the wiring assembly in an all-around manner, can effectively prevent sunlight and rain, ensures the normal operation of the pressure gauge, and prolongs the service life of the pressure gauge and the wiring assembly.
Drawings
Fig. 1 is a schematic structural diagram of a first viewing angle of an unused state of a protective cover according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a second perspective view of an unused state of the protective cover according to the embodiment of the present invention;
fig. 3 is a schematic structural view of a mounted state of the protective cover according to the embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a locking assembly according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a sunshade cover provided by an embodiment of the present invention.
In the figure:
2. a sunshade cover; 3. a locking assembly; 4. a fixed shaft; 5. a pressure gauge; 6. a wiring assembly; 7. an observation window;
11. a main body portion; 12. an attachment portion; 21. a handle; 22. a connecting through hole; 31. buckling; 32. tong (Chinese character of 'tong')
A lane; 34. a first connecting member; 35. a second connecting member;
111. a containing groove; 311. a substrate block; 312. a first bump; 313. a second bump;
3131. a first connecting plate; 3132. a second connecting plate.
Detailed Description
Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar parts throughout or parts having the same or similar functions. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "mounted" are to be construed broadly, e.g., as meaning both connected and disconnectable, mechanically and electrically, directly or indirectly via intermediate media, whether internal or external to the elements, or in any other relationship between the elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description of the present invention, unless otherwise expressly specified or limited, the first feature "on" or "under" the second feature may include the first feature and the second feature being in direct contact, or may include the first feature and the second feature being in contact not directly but with 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.
The present embodiment provides a protective cover for covering a pressure gauge 5 and a wiring assembly 6, as shown in fig. 1 to 5, which includes a cover body, an observation window 7, a sunshade 2 and a locking assembly 3. The cover body is provided with an accommodating cavity, the front surface of the cover body is provided with a first opening, the bottom end of the cover body is provided with a second opening, the first opening and the second opening are both communicated with the accommodating cavity, the pressure gauge 5 and the wiring assembly 6 can be accommodated in the accommodating cavity, the first opening is over against a dial plate of the pressure gauge 5, and the neck of the pressure gauge 5 can penetrate through the second opening; the observation window 7 covers the first opening; the sun-shading cover 2 is rotatably arranged on the cover body and can cover the surface of the observation window 7; the locking assembly 3 is arranged on the cover body and can clamp and fix the neck of the pressure gauge 5. In this embodiment, the lock subassembly 3 can be dismantled and set up on the cover body, makes things convenient for dismouting between lock subassembly 3 and the manometer 5 and the replacement of lock subassembly 3, in addition, first opening, observation window 7 and sunshade lid 2 all preferred circular, and the diameter ratio of observation window 7 is slightly bigger than the diameter of manometer 5, and the diameter ratio of sunshade lid 2 is slightly bigger than the diameter of observation window 7, and observation window 7 adopts the organic glass material to make and forms, has high transparency, mechanical strength height, light in weight's characteristics.
In this embodiment, the wiring assembly 6 includes a secondary terminal box and a secondary wire sleeve, which is a common part matched with the pressure gauge 5, and the detailed structure is not described herein.
Manometer 5, the 6 holding of wiring subassembly in the holding intracavity, can avoid external environment's erosion, cover body passes through lock solid subassembly 3 and manometer 5 fixed connection for cover body cover supports when establishing firmly, sets up observation window 7 and makes operating personnel conveniently look over and copy manometer 5's registration, sets up sunshade cover 2 in order to cover observation window 7, prevents that the sunlight from openly exposing to the sun to manometer 5, extension manometer 5's life. This safety cover can carry out all-round cladding to manometer 5, wiring subassembly 6, can be sun-proof, rain-proof effectively, has guaranteed manometer 5's normal operating, has prolonged manometer 5, wiring subassembly 6's life.
Further, the cover body comprises a main body portion 11 and an auxiliary portion 12 which are connected with each other, a first opening is formed in the main body portion 11, a first accommodating space is formed in the main body portion 11, a second accommodating space is formed in the auxiliary portion 12, the first accommodating space is communicated with the second accommodating space to form an accommodating cavity, the pressure gauge 5 is accommodated in the first accommodating space, and the wiring assembly 6 is accommodated in the second accommodating space. According to the position relation of the pressure gauge 5 and the wiring assembly 6 on the spot, the cover body is correspondingly divided into the main body part 11 and the auxiliary part 12, so that the cover body is convenient to align when being covered, the space inside the cover body is reasonable in distribution, and the space utilization rate is high.
In this embodiment, the top end of the main body 11 is of an arch structure, so that liquid such as rainwater can easily slide down along the surface of the arch structure, and the liquid is not easily accumulated at the top end of the main body 11, thereby better preventing the liquid such as rainwater from corroding the cover body and prolonging the service life of the cover body. Of course, the top end of the main body 11 may have other shapes such as a flat surface, and will not be described herein.
Furthermore, the cover body has a receiving groove 111, the locking assembly 3 is received in the receiving groove 111, and an opening of the receiving groove 111 faces the front surface. Above-mentioned arrangement, on the one hand, the cover body cover is located locking Assembly 3, avoids locking Assembly 3 to blow the sun and rusts and damage, prolongs locking Assembly 3's life, and on the other hand, through storage tank 111 operating personnel not only can conveniently carry out the dismouting with locking Assembly 3 from the inside of cover body, can also look over locking Assembly 3's installation condition and user state at any time.
As shown in fig. 4, the locking assembly 3 includes two buckles 31 connected to each other, the two buckles 31 are arranged in an axisymmetrical manner, a groove is formed on an inner side of each buckle 31, the two grooves are butted to form a channel 32, the channel 32 faces the second opening, and the channel 32 can clamp and fix a neck of the pressure gauge 5.
Specifically, each clip 31 includes a base block 311, and a first bump 312 and a second bump 313 connected to the base block 311, the second bump 313 is located at an end of the base block 311 and spaced apart from the first bump 312, and the base block 311, the first bump 312 and the second bump 313 between the first bump 312 and the second bump 313 are surrounded to form a groove. When the two buckles 31 are butted, the two butted first bumps 312 form a first side wall of the channel 32, the two butted second bumps 313 form a second side wall of the channel 32, when the neck of the pressure gauge 5 is positioned in the channel 32, the first side wall abuts against one side of the neck of the pressure gauge 5, and the second side wall abuts against the other side of the neck of the pressure gauge 5, so that the neck of the pressure gauge 5 is firmly clamped.
In this embodiment, the two buckles 31 can be detachably connected, so as to facilitate the assembly, disassembly and storage. Specifically, each of the second protrusions 313 includes a first connecting plate 3131 and a second connecting plate 3132 which are connected at an angle, an end of one end of the second connecting plate 3132 is connected to an end of the base block 311, an end of the other end of the second connecting plate 3131 is connected to the first connecting plate 3132, the second connecting plate 3132 is a groove wall of the groove, a mounting hole is formed in the first connecting plate 3131, and when the two buckles 31 are butted, the first connecting member 34 is simultaneously inserted into the two mounting holes. The first connector 34 connects the two first connection plates 3131 so that the ends of the two buckles 31 are connected firmly. In the present embodiment, the cross section of the second bump 313 is an L-shaped plane. First connecting piece 34 is the screw, correspondingly, and the mounting hole is the screw hole, and the coating has neutral structure to glue between screw and the screw hole, and neutral structure glues and has good adhesive force, tensile strength is big and do not corrode the metal, can seal the processing effectively to the junction, prevents that screw and screw hole from receiving rainwater and sun erosion and rusty damage.
In this embodiment, the locking assembly 3 is detachably disposed on the cover body. One end of each base block 311 is provided with an internal threaded hole, the back of the main body 11 is provided with two through holes, the two through holes are opposite to the two internal threaded holes one by one, and each group of opposite through holes and the internal threaded holes are screwed with a second connecting piece 35. The fixing mode makes the assembling and disassembling operation of the locking component 3 simple and convenient. In this embodiment, the second connecting member 35 is a screw, and the joint between the screw and the through hole and the internal threaded hole is coated with a neutral structural adhesive, and the principle and the function are the same as those described above.
When installing this safety cover, earlier cover the body from last down with manometer 5 cover, join the recess of two buckles 31 again in order to block manometer 5's neck, pass the through-hole at the 11 backs of main part and spiro union in buckle 31's internal thread hole with two second connecting pieces 35 in proper order again, with the one end of two buckles 31 fixed, wear to locate in two mounting holes with the other end with two buckles 31 in order to screw up fixedly with first connecting piece 34 at last, thereby make this safety cover firm installation, difficult not hard up.
Optionally, a fixing shaft 4 is arranged at the edge of the first opening, a connecting through hole 22 is formed in the sunshade cover 2, the fixing shaft 4 penetrates through the connecting through hole 22, and the sunshade cover 2 can rotate around the fixing shaft 4. In the embodiment, the sunshade cover 2 is provided with a shifting handle 21, as shown in fig. 5, the end of the shifting handle 21 is a spherical structure, so that a person can conveniently hold the shifting handle 21 and shift the shifting handle clockwise or counterclockwise, and the sunshade cover 2 can rotate around the fixed shaft 4 to open the sunshade cover 2 leftwards or rightwards. Under the normal condition, the sunshade lid 2 covers observation window 7, prevents that the sunlight from openly exposing to the sun to manometer 5, improves manometer 5's life and prevents that the overcompensation phenomenon from appearing in manometer 5. When the operating personnel need look over, when copying 5 numerical values of manometer, can stir and dial handle 21 and expose with rotatory sunshade cover 2 to manometer 5 to look over and copy, loosen after the work finishes and dial handle 21, sunshade cover 2 can be rotatory along fixed axle 4 by oneself under the effect of self gravity, returns to the position of sheltering from observation window 7 originally, and this kind of mode of opening is convenient nimble, labour saving and time saving.
In this embodiment, the cover body is made of a zinc-aluminum alloy plated sheet. The zinc-aluminum alloy plating plate has good antirust capacity, extremely strong reflection capacity to sunlight, toughness is very high, can avoid leading to the cover body to rust owing to long-time exposure to the sun and rain, ageing, warp, can play fine rain-proof effect, can hide and reflect sunlight again, avoid manometer 5 to receive the sunlight and penetrate directly or this safety cover accumulation heat causes the high temperature and produce the overcompensation phenomenon, guarantee manometer 5's normal operating.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A protective cover for a shroud pressure gauge (5) and a wiring assembly (6), comprising:
the cover body is provided with an accommodating cavity, a first opening is formed in the front surface of the cover body, a second opening is formed in the bottom end of the cover body, the first opening and the second opening are communicated with the accommodating cavity, the pressure gauge (5) and the wiring assembly (6) can be accommodated in the accommodating cavity, the first opening is over against the dial plate of the pressure gauge (5), and the neck of the pressure gauge (5) can penetrate through the second opening;
a viewing window (7) covering the first opening;
the sun-shading cover (2) is rotatably arranged on the cover body and can cover the surface of the observation window (7);
the locking assembly (3) is arranged on the cover body, and the locking assembly (3) can be used for clamping and fixing the neck of the pressure gauge (5).
2. The protective cover according to claim 1, wherein the cover body comprises a main body part (11) and an auxiliary part (12) which are connected with each other, the first opening is arranged on the main body part (11), a first accommodating space is arranged in the main body part (11), a second accommodating space is arranged in the auxiliary part (12), the first accommodating space is communicated with the second accommodating space to form the accommodating cavity, the pressure gauge (5) is accommodated in the first accommodating space, and the wiring assembly (6) is accommodated in the second accommodating space.
3. A protective cover according to claim 2, wherein the top end of the body portion (11) is of an arch-shaped configuration.
4. The protective cover according to claim 1, wherein the cover body is provided with a receiving groove (111), the locking assembly (3) is received in the receiving groove (111), and the receiving groove (111) is open toward the front surface.
5. The protective cover according to claim 1, characterized in that said locking assembly (3) comprises two interconnected catches (31), said two catches (31) being arranged axially symmetrically, each catch (31) being provided with a groove on the inside, said grooves being able to form a channel (32) in abutment, said channel (32) being opposite said second opening, said channel (32) being able to clamp the neck of said pressure gauge (5).
6. The protective cover according to claim 5, characterized in that each snap (31) comprises a base block (311) and a first projection (312) and a second projection (313) connected to the base block (311), the second projection (313) is located at an end of the base block (311) and is spaced apart from the first projection (312), and the base block (311), the first projection (312) and the second projection (313) located between the first projection (312) and the second projection (313) enclose the groove.
7. The protective cover according to claim 6, wherein each of the second protrusions (313) comprises a first connecting plate (3131) and a second connecting plate (3132) which are connected at an angle, one end of the second connecting plate (3132) is connected to the end of the base block (311), the other end of the second connecting plate is connected to the first connecting plate (3131), the second connecting plate (3132) is a groove wall of the groove, the first connecting plate (3131) is provided with a mounting hole, and when the two buckles (31) are butted, the first connecting piece (34) is simultaneously inserted into the two mounting holes.
8. The protective cover according to claim 6, wherein each of the base blocks (311) has an end portion formed with an internally threaded hole, and the cover body has a rear surface formed with two through holes, the two through holes being aligned with the two internally threaded holes, and a second connecting member (35) is threaded into each of the aligned through holes and the internally threaded holes.
9. The protective cover according to claim 1, characterized in that a fixed shaft (4) is arranged at the edge of the first opening, a connecting through hole (22) is formed in the sunshade cover (2), the fixed shaft (4) is arranged through the connecting through hole (22), and the sunshade cover (2) can rotate around the fixed shaft (4).
10. A protective cover according to any one of claims 1 to 9, wherein the cover body is made of a zinc-aluminium alloy plated sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010543494.3A CN111721468B (en) | 2020-06-15 | 2020-06-15 | Protective cover |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010543494.3A CN111721468B (en) | 2020-06-15 | 2020-06-15 | Protective cover |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111721468A true CN111721468A (en) | 2020-09-29 |
| CN111721468B CN111721468B (en) | 2022-01-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010543494.3A Active CN111721468B (en) | 2020-06-15 | 2020-06-15 | Protective cover |
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| Country | Link |
|---|---|
| CN (1) | CN111721468B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1393642A1 (en) * | 2002-09-02 | 2004-03-03 | Osbe Srl | Protective helmet, in particular for motorcycle pilots, provided with sun visor |
| CN201707168U (en) * | 2010-05-27 | 2011-01-12 | 陈力祯 | Warning color plate structure of differential pressure gauge |
| CN204716025U (en) * | 2015-05-28 | 2015-10-21 | 深圳供电局有限公司 | A kind of light-permeable observation port for hermetic type ring main unit |
| CN204988620U (en) * | 2015-09-29 | 2016-01-20 | 国网天津市电力公司 | Rain -proof cover of outdoor GIS equipment SF6 barometer |
| CN208672156U (en) * | 2018-08-08 | 2019-03-29 | 淮安红相光电科技有限公司 | A kind of novel fire-resistant arc infrared temperature measurement window |
| CN209541983U (en) * | 2019-03-21 | 2019-10-25 | 大连华泰臣科技服务有限公司 | A kind of pressure gauge equipped with exterior protection structure |
-
2020
- 2020-06-15 CN CN202010543494.3A patent/CN111721468B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1393642A1 (en) * | 2002-09-02 | 2004-03-03 | Osbe Srl | Protective helmet, in particular for motorcycle pilots, provided with sun visor |
| CN201707168U (en) * | 2010-05-27 | 2011-01-12 | 陈力祯 | Warning color plate structure of differential pressure gauge |
| CN204716025U (en) * | 2015-05-28 | 2015-10-21 | 深圳供电局有限公司 | A kind of light-permeable observation port for hermetic type ring main unit |
| CN204988620U (en) * | 2015-09-29 | 2016-01-20 | 国网天津市电力公司 | Rain -proof cover of outdoor GIS equipment SF6 barometer |
| CN208672156U (en) * | 2018-08-08 | 2019-03-29 | 淮安红相光电科技有限公司 | A kind of novel fire-resistant arc infrared temperature measurement window |
| CN209541983U (en) * | 2019-03-21 | 2019-10-25 | 大连华泰臣科技服务有限公司 | A kind of pressure gauge equipped with exterior protection structure |
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| Publication number | Publication date |
|---|---|
| CN111721468B (en) | 2022-01-07 |
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