CN107084271B - Ammonia leakage intelligent control valve - Google Patents
Ammonia leakage intelligent control valve Download PDFInfo
- Publication number
- CN107084271B CN107084271B CN201710432504.4A CN201710432504A CN107084271B CN 107084271 B CN107084271 B CN 107084271B CN 201710432504 A CN201710432504 A CN 201710432504A CN 107084271 B CN107084271 B CN 107084271B
- Authority
- CN
- China
- Prior art keywords
- valve
- ammonia
- mounting hole
- valve cover
- cover
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/12—Covers for housings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
- F16K37/0025—Electrical or magnetic means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
- F16K41/10—Spindle sealings with diaphragm, e.g. shaped as bellows or tube
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Indication Of The Valve Opening Or Closing Status (AREA)
Abstract
The invention provides an ammonia leakage intelligent control valve which can be provided with an ammonia sensor and can sense ammonia leakage so as to reduce pollution of parts. The upper valve cover is positioned above the lower valve cover, and the bottom of the upper valve cover is fixed with the top of the lower valve cover; the lower valve cover and the valve body are fixed together; the gland nut is arranged in the gland nut mounting hole, the valve rod nut is arranged in the valve rod nut mounting hole, the guide sleeve is arranged in the guide sleeve mounting hole, the packing gland is arranged in the packing gland mounting hole, and the packing is arranged in the packing mounting hole; the ammonia leakage intelligent control valve also comprises an explosion-proof box and an ammonia sensor assembly; the ammonia sensor assembly comprises a control panel and an ammonia sensor, and the control panel is connected with the ammonia sensor; an ammonia gas sensor interface is arranged in the upper valve cover, is communicated with the valve rod mounting hole and is positioned below the filler mounting hole; the ammonia sensor is arranged in the ammonia sensor interface; the control panel is arranged in the explosion-proof box; the explosion-proof box is installed on the upper valve cover, and the explosion-proof box covers the ammonia sensor.
Description
Technical Field
The invention relates to an ammonia leakage intelligent control valve.
Background
Valves for ammonia are widely used in the field of controlling ammonia gas, ammonia liquor, fuel gas, etc., such as in chinese patent application No. 201610553111.0.
The prior art ammonia valve has the following disadvantages:
1. the parts such as the filler of ammonia valve expose in the outside, can't avoid external liquid inflow or infiltration valve's cavity in, sealing performance is low, and life is short, and the untimely change of expiring can lead to leaking the probability to increase, can not in time perceive.
2. After the ammonia gas leaks for a certain time, the nose, the pharynx and the eyes of a person receive irritation, so that the eyes are possibly blinded, and the skin of the person can be burnt in rainy days. At present, whether the valve for ammonia leaks or not is monitored, and a portable ammonia detection alarm is generally adopted for detection. The patrol personnel carries the portable ammonia gas detection alarm, so that the on-site air is monitored at any time, and when the patrol personnel is in a patrol, the portable detector is too short in detection distance, and reliable data can be obtained only by approaching an ammonia valve, and if leakage occurs, the portable detector has no small influence on a human body; if there is wind, rain in the ammonia district, that portable ammonia detects alarm instrument hardly in time report to the police, moreover because the flow of outdoor air, the numerical value of such detection does not coincide with the actual leakage value of valve, simultaneously, and manual detection frequency is not high, does not monitor often.
3. In the structure of the existing valve for ammonia, the design of the valve cover is very compact, and the corrugated pipe structure is taken as an example: the valve cover is internally provided with a bellows component, the bellows component is internally provided with a lower valve rod and then is filled with filler, and the upper end of the filler is sequentially provided with a filler gland, an anti-rotation block, an upper valve rod, a valve rod nut, a hand wheel or an actuator. There is no place to house the ammonia sensor and the ammonia sensor is not exposed outdoors for a long period of time.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the ammonia leakage intelligent control valve which has reasonable structural design, can be provided with an ammonia sensor and is used for sensing ammonia leakage and reducing pollution of parts.
The invention solves the problems by adopting the following technical scheme: an ammonia leakage intelligent control valve comprises a valve body, a valve rod, a corrugated pipe assembly, a valve cover, a filler gland, a guide sleeve, a valve rod nut and a gland nut; the valve cover is fixed with the valve body; a valve rod mounting hole is formed in the valve cover, and the valve rod is mounted in the valve rod mounting hole; the upper end of the bellows component is fixedly arranged in the valve cover, and the lower end of the bellows component is fixed with the valve rod; the packing is sleeved outside the valve rod and is arranged in the valve cover through a packing gland; the valve rod nut is connected with the valve rod; the gland nut is arranged on the valve cover and presses on the valve rod nut; the guide sleeve is connected with the valve rod; the method is characterized in that: the valve cover consists of a lower valve cover and an upper valve cover; the upper valve cover is positioned above the lower valve cover, and the bottom of the upper valve cover is fixed with the top of the lower valve cover; the lower valve cover and the valve body are fixed together; the upper valve cover is sequentially provided with a gland nut mounting hole, a valve rod nut mounting hole, a guide sleeve mounting hole, a packing gland mounting hole and a packing mounting hole from top to bottom, wherein the gland nut is arranged in the gland nut mounting hole, the valve rod nut is arranged in the valve rod nut mounting hole, the guide sleeve is arranged in the guide sleeve mounting hole, the packing gland is arranged in the packing gland mounting hole, and the packing is arranged in the packing mounting hole; the ammonia leakage intelligent control valve also comprises an explosion-proof box and an ammonia sensor assembly; the ammonia sensor assembly comprises a control panel and an ammonia sensor, and the control panel is connected with the ammonia sensor; an ammonia gas sensor interface is arranged in the upper valve cover, is communicated with the valve rod mounting hole and is positioned below the filler mounting hole; the ammonia sensor is arranged in the ammonia sensor interface; the control panel is arranged in the explosion-proof box; the explosion-proof box is installed on the upper valve cover, and the explosion-proof box covers the ammonia sensor.
The explosion-proof box comprises a box body and a box cover; the box body is fixed on the side surface of the upper valve cover; the control panel is fixed in the box body; the box cover is fixed on the box body to seal the box body.
The upper end of the bellows component is fixedly arranged between the lower valve cover and the upper valve cover.
The bottom of the box body is fixedly provided with a mounting column, and the control panel is fixed on the mounting column.
The bottom of the upper valve cover and the top of the lower valve cover are respectively provided with a chamfer.
The bottom surface of the box body is provided with a box body mounting hole, a bolt is arranged in the box body mounting hole, and the box body is fixed on the side surface of the upper valve cover by the bolt.
The side surface and the bottom surface of the box body are provided with wiring holes.
The ammonia gas sensor is fixedly arranged in the ammonia gas sensor interface through the ammonia gas sensor gland nut, and the ammonia gas sensor gland nut is in threaded connection with the ammonia gas sensor interface.
Compared with the prior art, the invention has the following advantages and effects:
1. the valve cover is formed by lower valve cover and upper valve cover, forms sectional type structure, and sectional type valve cover has reserved sufficient space and installed ammonia sensor subassembly, is not in ordinary valve cover structure.
2. Be equipped with gland nut mounting hole, valve rod nut mounting hole, uide bushing mounting hole, gland mounting hole and filler mounting hole in the upper valve gap for gland nut, valve rod nut, uide bushing, gland and filler all set up in the upper valve gap, and external environment can not pollute easily and play these spare part, has reduced the pollution of spare part, improves life.
3. An ammonia sensor is arranged in an ammonia sensor interface positioned below the filler mounting hole, and can generate a signal at the first time when the medium does not permeate the filler.
4. The ammonia sensor component has a wireless transmission function, particularly a Bluetooth function, can acquire whether the valve corrugated pipe leaks within 15 meters after being paired with a mobile phone of a patrol inspector, and can acquire data of the leakage degree, and inform the patrol inspector of the leakage amount at the position of checking the filler, so that the filler is properly pressed, or the valve is timely replaced, and leakage is prevented.
5. When the medium leaks on one hand, and the ammonia sensor discharges on the other hand, explosion can be generated on the two sides at the same time, so that the explosion-proof box covers the ammonia sensor, and fragments generated by the ammonia sensor after accidental explosion can be effectively prevented from injuring people or objects.
6. The structure of the upper valve cover and the explosion-proof box is convenient for replacing parts of the ammonia sensor, so that the maintenance time is effectively saved, and the cost is reduced.
Drawings
Fig. 1 and 2 are schematic cross-sectional structures of embodiments of the present invention.
FIG. 3 is a schematic cross-sectional view of an upper valve cover according to an embodiment of the present invention.
Fig. 4 is a schematic cross-sectional view of a lower valve cover according to an embodiment of the present invention.
Fig. 5 is a schematic perspective view of a box body according to an embodiment of the present invention.
Fig. 6 is a schematic front view of a box according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and not limited to the following examples.
Referring to fig. 1-6, an embodiment of the present invention includes a valve body 1, a valve flap 2, a valve stem 3, a bellows assembly 4, a valve cap 7, a packing 10, a packing gland 11, a guide sleeve 12, a gasket 13, a valve stem nut 14, a gland nut 15, a hand wheel 16, a valve position indicator 17, an explosion proof box 19, an ammonia sensor gland nut 20, and an ammonia sensor assembly.
The valve cover 7 is fixed with the valve body 1.
A valve stem mounting hole 9 is provided in the valve cap 7, and the valve stem 3 is mounted in the valve stem mounting hole 9. The bottom of the valve rod 3 is connected with the valve clack 2.
The valve cover 7 is composed of a lower valve cover 6 and an upper valve cover 8. The upper valve cover 8 is positioned above the lower valve cover 6, and the bottom of the upper valve cover 8 and the top of the lower valve cover 6 are welded and fixed. The bottom of the upper valve cover 8 and the top of the lower valve cover 6 are both provided with chamfers, so that the welding is convenient.
The upper valve cover 8 is provided with a gland nut mounting hole 81, a valve rod nut mounting hole 82, a guide sleeve mounting hole 83, a packing gland mounting hole 84 and a packing mounting hole 85 from top to bottom in sequence.
The lower bonnet 6 and the valve body 1 are fixed together by bolting.
The stem nut 14 is connected to the stem 3.
The hand wheel 16 is connected to the valve stem 3 by a stem nut 14, and when the hand wheel 16 is turned, the valve stem 3 moves up and down, thereby opening and closing the valve. The valve rod nut 14 is arranged in the valve rod nut mounting hole 82, a gasket 13 is arranged between the valve rod nut 14 and the upper valve cover 8, the gasket 13 plays a role in increasing friction and preventing the valve rod nut 14 from slipping, and thus when the hand wheel 16 and the valve rod nut 14 drive the valve rod 3 to move up and down, the valve rod 3 can be limited to rotate, and the vertical movement of the valve clack 2 is ensured.
The gland nut 15 is mounted on the bonnet 7 and is disposed in the gland nut mounting aperture 81. The gland nut 15 presses against the valve stem nut 14 preventing the valve stem nut 14 from being disengaged from the valve stem nut mounting bore 82.
The packing 10 is sleeved outside the valve rod 3. The bottom of the packing press sleeve 11 is pressed on the packing 10, the packing 10 is installed in the valve cover 7 through the packing press cover 11, the packing 10 is arranged in the packing installation hole 85, and the packing press cover 11 is arranged in the packing press cover installation hole 84.
The upper end of the bellows component 4 is fixedly arranged in the valve cover 7, is positioned between the lower valve cover 6 and the upper valve cover 8, and the lower end is fixed with the valve rod 3.
The top of the valve stem 3 is provided with a valve position indicator 17. The valve position indicator 17 monitors the displacement of the valve rod 3, and prevents the valve rod from being stuck with the gasket 13.
The guide bush 12 is connected to the valve stem 3 and is disposed in the guide bush mounting hole 83.
The ammonia sensor assembly includes a control panel 21 and an ammonia sensor 22. The control panel 21 is connected to an ammonia sensor 22. A wireless module, specifically a bluetooth module, is provided in the control panel 21.
An ammonia gas sensor interface 18 is arranged in the upper valve cover 8, and the ammonia gas sensor interface 18 is communicated with the valve rod mounting hole 9 and is positioned below the filler mounting hole 85. The ammonia sensor 22 is fixedly arranged in the ammonia sensor interface 18 through the ammonia sensor gland nut 20, and the ammonia sensor gland nut 20 is in threaded connection with the ammonia sensor interface 18, so that the ammonia sensor 22 is fixed and the ammonia sensor interface 18 is sealed. When the corrugated pipe assembly 4 is broken and the medium flows out from the joint of the valve rod 3 and the corrugated pipe assembly 4 below the packing 10 and reaches a certain concentration, the ammonia gas sensor 22 detects the medium and generates a current signal to the control panel 21, and the control panel 21 can transmit the leakage value of the medium to the terminal after processing.
A control panel 21 is mounted in the explosion proof box 19. The explosion proof case 19 includes a case body 191 and a case cover 192.
The bottom of the box body 191 is fixedly provided with a mounting column 193, a threaded mounting hole is formed in the mounting column 193, and a control panel 21 is fixed on the mounting column 193 through connection of a screw and the threaded mounting hole, so that the control panel 21 is fixed in the box body 191. The control panel 21 is suspended in the box body 191 by the mounting posts 193, and the control panel 21 is not contacted with the bottom surface of the box body 191, so that the heat dissipation performance is better.
The side and bottom surfaces of the box body 191 are provided with wiring holes 194, and the wiring holes 194 are used for threading wires of the ammonia sensor assembly.
The bottom surface of box 191 still is provided with box body mounting hole 195, installs the bolt in the box body mounting hole 195, and the bolt is fixed the side at upper valve gap 8 with box 191, and this structure convenient to detach and maintenance. The dimensioning has incorporated error proofing technology due to the requirements of the installation direction of the explosion proof box 19. The explosion-proof box 19 covers the ammonia sensor 22.
The cover 192 is fixed to the case 191 by screws to seal the case 191.
The foregoing in the description is only illustrative of the structure of the invention; moreover, the names of the parts of the present invention may be different, and all equivalent or simple changes of the structure, features and principles described in the conception of the present invention are included in the protection scope of the present invention.
Claims (8)
1. An ammonia leakage intelligent control valve comprises a valve body, a valve rod, a corrugated pipe assembly, a valve cover, a filler gland, a guide sleeve, a valve rod nut and a gland nut; the valve cover is fixed with the valve body; a valve rod mounting hole is formed in the valve cover, and the valve rod is mounted in the valve rod mounting hole; the upper end of the bellows component is fixedly arranged in the valve cover, and the lower end of the bellows component is fixed with the valve rod; the packing is sleeved outside the valve rod and is arranged in the valve cover through a packing gland; the valve rod nut is connected with the valve rod; the gland nut is arranged on the valve cover and presses on the valve rod nut; the guide sleeve is connected with the valve rod; the method is characterized in that: the valve cover consists of a lower valve cover and an upper valve cover; the upper valve cover is positioned above the lower valve cover, and the bottom of the upper valve cover is fixed with the top of the lower valve cover; the lower valve cover and the valve body are fixed together; the upper valve cover is sequentially provided with a gland nut mounting hole, a valve rod nut mounting hole, a guide sleeve mounting hole, a packing gland mounting hole and a packing mounting hole from top to bottom, wherein the gland nut is arranged in the gland nut mounting hole, the valve rod nut is arranged in the valve rod nut mounting hole, the guide sleeve is arranged in the guide sleeve mounting hole, the packing gland is arranged in the packing gland mounting hole, and the packing is arranged in the packing mounting hole; the ammonia leakage intelligent control valve also comprises an explosion-proof box and an ammonia sensor assembly; the ammonia sensor assembly comprises a control panel and an ammonia sensor, and the control panel is connected with the ammonia sensor; an ammonia gas sensor interface is arranged in the upper valve cover, is communicated with the valve rod mounting hole and is positioned below the filler mounting hole; the ammonia sensor is arranged in the ammonia sensor interface; the control panel is arranged in the explosion-proof box; the explosion-proof box is installed on the upper valve cover, and the explosion-proof box covers the ammonia sensor.
2. The ammonia leakage intelligent control valve according to claim 1, wherein: the explosion-proof box comprises a box body and a box cover; the box body is fixed on the side surface of the upper valve cover; the control panel is fixed in the box body; the box cover is fixed on the box body to seal the box body.
3. The ammonia leakage intelligent control valve according to claim 1, wherein: the upper end of the bellows component is fixedly arranged between the lower valve cover and the upper valve cover.
4. The ammonia leakage intelligent control valve according to claim 2, wherein: the bottom of the box body is fixedly provided with a mounting column, and the control panel is fixed on the mounting column.
5. The ammonia leakage intelligent control valve according to claim 1, wherein: the bottom of the upper valve cover and the top of the lower valve cover are both provided with chamfers.
6. The ammonia leakage intelligent control valve according to claim 2, wherein: the bottom surface of box body be provided with the box body mounting hole, install the bolt in the box body mounting hole, the bolt is fixed the side of upper valve gap with the box body.
7. The ammonia leakage intelligent control valve according to claim 2, wherein: the side and bottom surfaces of the box body are provided with wiring holes.
8. The ammonia leakage intelligent control valve according to claim 1, wherein: the ammonia gas sensor is fixedly arranged in the ammonia gas sensor interface through the ammonia gas sensor gland nut, and the ammonia gas sensor gland nut is in threaded connection with the ammonia gas sensor interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710432504.4A CN107084271B (en) | 2017-06-09 | 2017-06-09 | Ammonia leakage intelligent control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710432504.4A CN107084271B (en) | 2017-06-09 | 2017-06-09 | Ammonia leakage intelligent control valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107084271A CN107084271A (en) | 2017-08-22 |
| CN107084271B true CN107084271B (en) | 2023-05-26 |
Family
ID=59605533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710432504.4A Active CN107084271B (en) | 2017-06-09 | 2017-06-09 | Ammonia leakage intelligent control valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107084271B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11353128B2 (en) * | 2018-10-31 | 2022-06-07 | Emerson Vulcan Holding Llc | Valve body apparatus for use with fluid valves |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975279B (en) * | 2010-11-03 | 2012-07-25 | 淄博汇华阀业有限公司 | Early warning stop valve |
| CN202708296U (en) * | 2012-05-27 | 2013-01-30 | 重庆海王仪器仪表有限公司 | Regulating valve bellows leakage detection device |
| KR102227642B1 (en) * | 2013-02-25 | 2021-03-15 | 레이브 엔.피., 인크. | Smart valve |
| CN204731094U (en) * | 2015-07-07 | 2015-10-28 | 肇庆市嘉仪仪器有限公司 | A kind of protective cover of tank burst pressure detector |
| CN205102988U (en) * | 2015-09-23 | 2016-03-23 | 方正阀门集团有限公司 | Valve valve stem packing department gas leak detection device |
| CN105952915A (en) * | 2016-07-14 | 2016-09-21 | 杭州安其拉科技有限公司 | Ammonia valve |
| CN206874921U (en) * | 2017-06-09 | 2018-01-12 | 浙江万龙机械有限公司 | Ammonia leaks intelligence control valve |
-
2017
- 2017-06-09 CN CN201710432504.4A patent/CN107084271B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN107084271A (en) | 2017-08-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107084271B (en) | Ammonia leakage intelligent control valve | |
| CN101408096A (en) | Visual dark rod flat plate gate valve | |
| CN202132594U (en) | Prewarning stop valve | |
| CN103680834B (en) | A kind of transformer oil storage of piston structure | |
| CN204304340U (en) | Stern bearing temperature transducer cable protection pipe holder | |
| CN108037042B (en) | Gas density meter | |
| CN101865327A (en) | Control valve with bellows reverse pressure-bearing sealing structure | |
| CN206874921U (en) | Ammonia leaks intelligence control valve | |
| CN203631250U (en) | Transformer oil conservator of piston structure | |
| CN208719349U (en) | A kind of resistance to high eccentric fuel injector/spark plug oil seal for preventing installation from turning over lip | |
| CN201372769Y (en) | Back pressure valve with pressure sensor | |
| CN201121508Y (en) | Visible hidden lever flat gate valve | |
| CN206470269U (en) | A kind of on-Line Monitor Device for transformer | |
| CN219453050U (en) | Leakage-proof explosion-proof intelligent micro-electric valve for gas bottle | |
| CN215492203U (en) | Sensing mechanism for environmental simulation experiment equipment | |
| CN219063806U (en) | Lithium bromide absorption unit | |
| CN215951139U (en) | Gas pressure regulating temperature pressure correction metering box | |
| CN214745020U (en) | Natural gas leakage alarm device | |
| CN216484851U (en) | Sensor assembly for monitoring underground environment | |
| CN211598901U (en) | Ignition device of engine | |
| CN219911378U (en) | Automatic oil stopping structure for dismounting oil level gauge | |
| CN209037406U (en) | A kind of moisture-proof DC charging seat | |
| CN219391215U (en) | Barometer with sealable explosion-proof device | |
| CN218625672U (en) | Sealing device of handle chuck type butterfly valve | |
| CN219977646U (en) | Differential pressure indicator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |