CN114185167B - Vacuum main lens cone structure suitable for solar telescope - Google Patents
Vacuum main lens cone structure suitable for solar telescope Download PDFInfo
- Publication number
- CN114185167B CN114185167B CN202111523615.9A CN202111523615A CN114185167B CN 114185167 B CN114185167 B CN 114185167B CN 202111523615 A CN202111523615 A CN 202111523615A CN 114185167 B CN114185167 B CN 114185167B
- Authority
- CN
- China
- Prior art keywords
- vacuum
- main
- main lens
- lens barrel
- window
- 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
- 238000007789 sealing Methods 0.000 claims abstract description 69
- 239000000463 material Substances 0.000 claims abstract description 21
- 230000003287 optical effect Effects 0.000 claims abstract description 17
- 230000007246 mechanism Effects 0.000 claims abstract description 10
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 12
- 229920001971 elastomer Polymers 0.000 claims description 12
- 239000007769 metal material Substances 0.000 claims description 7
- 229920001973 fluoroelastomer Polymers 0.000 claims description 6
- 229910052759 nickel Inorganic materials 0.000 claims description 6
- 239000004033 plastic Substances 0.000 claims description 4
- 238000004381 surface treatment Methods 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 229910000975 Carbon steel Inorganic materials 0.000 claims description 2
- 239000010962 carbon steel Substances 0.000 claims description 2
- 238000009713 electroplating Methods 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 238000012423 maintenance Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 2
- 230000005855 radiation Effects 0.000 abstract description 2
- 238000007747 plating Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000001465 metallisation Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 1
- 238000003384 imaging method Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B23/00—Telescopes, e.g. binoculars; Periscopes; Instruments for viewing the inside of hollow bodies; Viewfinders; Optical aiming or sighting devices
- G02B23/16—Housings; Caps; Mountings; Supports, e.g. with counterweight
Landscapes
- Physics & Mathematics (AREA)
- Astronomy & Astrophysics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Telescopes (AREA)
Abstract
The invention provides a vacuum main lens barrel structure suitable for a solar telescope, which comprises a main sealing window (1), a pipeline interface (2), a main lens barrel (3), a four-way operation window (4), a four-way (5), a shaft head sealing window (6), a main lens rear cover (7), a main lens adjusting cover (8), a sealing shaft head (9), a side sealing window (10), a vacuum gauge (11) and a manual vacuum valve (12). The main lens barrel comprises optical elements such as a main lens, a secondary lens, a third lens and the like and a corresponding supporting and adjusting mechanism. The inside of the main lens barrel is vacuum, and excessive air in the lens barrel is pumped away periodically through the manual vacuum valve (12), so that the stability of the vacuum degree is maintained. The advantages are that: the primary mirror vision effect under solar radiation can be reduced, and the optical element in the lens cone can be effectively protected. The invention suppresses the surface deflation of the materials in the vacuum cavity through design and special process, and reduces the maintenance period and cost of the solar telescope.
Description
Technical Field
The invention relates to the field of optical machine design of astronomical observation equipment, in particular to a vacuum main lens barrel structure suitable for a solar telescope.
Background
Solar telescopes of various forms and different uses are developed in many countries of the world for sun observation, and the caliber varies from tens of centimeters to several meters. Conventionally, the caliber of a solar telescope is below 1m, and in order to solve the heat distortion in the telescope, a vacuum type lens barrel structure is adopted. The vacuum light path can effectively reduce the influence of atmospheric disturbance and air convection movement in the telescope on imaging quality. However, the air tightness of the traditional vacuum solar telescope is limited by the sealing capability and the surface air release of complex structural materials in the main telescope, so that the maintenance period is short and the operation cost is high. The invention is formed by pipeline metallization and integral welding, and adopts the vacuum cavity inner surface treatment technology of a specific process, so that the deflation rate of the inner material of the main telescope is well inhibited, and the maintenance period and the cost of the solar telescope are reduced.
Disclosure of Invention
The invention aims to solve the technical problems that: the invention reduces the vision effect of the primary mirror under solar radiation, effectively protects the optical elements in the lens cone, solves the problems of more connecting surfaces, complex internal structure and insufficient air tightness of the vacuum primary mirror cone, and greatly reduces the maintenance period and the operation cost of the telescope through ingenious design and special technology.
The technical scheme adopted for solving the technical problems is as follows: the vacuum main lens barrel structure suitable for the solar telescope comprises a main sealing window, a pipeline interface, a main lens barrel, a four-way operation window, a four-way joint, a shaft head sealing window, a main lens rear cover, a main lens adjusting cover, a sealing shaft head and a side sealing window. The main body of the airtight main lens barrel consists of a main sealing window, a main lens barrel, a four-way joint, a main lens rear cover and a main lens adjusting cover, wherein the main sealing window, a side sealing window and a shaft head sealing window are used as light passing windows and positioned at the front end and the side face of the main lens barrel, the four-way joint operation window and a sealing shaft head are used as mounting and adjusting windows and positioned at the middle part of the four-way joint, a pipeline interface is an electrical interface, a vacuum gauge and a manual vacuum valve are arranged on the end face of the four-way joint, a cavity of the sealed main lens barrel is connected with a vacuum pump through the manual vacuum valve, and the vacuum gauge is used for monitoring the air pressure value of the cavity in real time.
The vacuum main lens barrel structure is a sealed cavity, air is pumped away through the manual vacuum valve to form a vacuum system, a main lens, a secondary lens, a third lens and a corresponding supporting and adjusting mechanism are arranged in the vacuum main lens barrel, when the internal mechanism of the vacuum main lens barrel is operated or adjusted, the manual vacuum valve is required to be opened for deflation, so that the vacuum main lens barrel is not in a vacuum state any more, and after the internal pressure and the external pressure reach balance, the operation of disassembling the main sealing window, the shaft head sealing window and the side sealing window is performed.
Further, the main sealing window is positioned at the forefront end of the main lens barrel structure and is the largest optical component for sealing the main lens barrel; the side sealing window is positioned on the side surface of the main lens barrel and is used as an adjusting operation port of the secondary lens and the main focal position mechanism, and most of solar energy which is not needed by a subsequent optical system is released; the four-way operation windows are 4 and are positioned on the side surface of the four-way, and are used for operating and adjusting the third mirror mechanism; the shaft head sealing window is the last optical element of the main lens barrel and is a light transmission window of a subsequent system; the main mirror adjusting cover is an operating window for adjusting the posture and the position of the main mirror.
Furthermore, the sealing rubber rings at all the connecting positions of the parts are made of fluororubber materials, and the sealing rubber rings are custom-molded, so that the surface air release amount of the rubber materials is reduced.
Furthermore, the main body structure is formed by welding common carbon steel materials, so that the stray light requirement of the optical system is considered in order to inhibit the deflation of the inner surface material of the sealing cavity, and the inner surface is polished and then subjected to surface treatment of electroplating black nickel.
Further, in order to reduce plastic pipelines in the vacuum main lens barrel, the water pipe is made of metal materials, is integrally installed with the main lens barrel, and is integrally welded with a joint at a pipeline interface after being installed in place.
Further, the vacuum gauge is arranged on the end face of the four-way joint, after the telescope works for a long time, when the air pressure reading of the vacuum gauge exceeds a specified threshold value, the telescope master control system gives a prompt, at the moment, a vacuum pump air suction pipeline is required to be manually connected, a manual vacuum valve is opened, air suction operation is repeated, and the vacuum degree inside the vacuum main lens barrel is ensured to be maintained within a certain range.
The principle of the invention is as follows: the vacuum main lens cone structure is suitable for a solar telescope, and the sealing cavity of the vacuum main lens cone comprises a main sealing window, a main lens cone, a four-way operation window, a four-way joint, a shaft head sealing window, a main lens rear cover, a main lens adjusting cover, a sealing shaft head and a side sealing window. Before the solar telescope works, the air in the main telescope is pumped out through a manual vacuum valve to form a vacuum cavity. After the solar telescope works for a long time, when the air pressure reading of the vacuum gauge exceeds a specified threshold value, the system sends out a prompt. At the moment, the vacuum pump air suction pipeline is manually connected, the manual vacuum valve is opened, air suction operation is performed again, and the vacuum degree inside the vacuum main lens barrel is ensured to be maintained within a certain range. The pipeline joint at the pipeline joint and the pipeline inside the main lens barrel are integrally welded and formed by adopting metal materials, so that plastic materials inside the lens barrel can be reduced to the greatest extent, and sealing rubber rings at all connecting positions are made of fluororubber materials to control the deflation rate of materials inside the main lens barrel. The inner surface of the sealed cavity of the vacuum main lens barrel adopts a black nickel plating mode, so that the influence of stray light on a subsequent optical system is inhibited while the air release amount of a metal material is reduced. When the main lens barrel of the solar telescope needs to be adjusted and maintained, the manual vacuum valve is opened to deflate, so that the internal air pressure of the main lens barrel rises, and after the internal and external pressures reach balance, the window sealing adjustment and maintenance are disassembled. When the main mirror system is maintained, the main mirror adjusting cover is required to be detached; when the secondary mirror system is maintained, the side seal window is required to be disassembled; when the three-mirror system is maintained, the four-way operation window is required to be disassembled. During the working period of the solar telescope, the main sealing window should be avoided from being disassembled as much as possible. The main sealing window is large in size, and the air tightness of the vacuum main lens barrel can be affected by damaging the sealing rubber strip during repeated disassembly.
Compared with the prior art, the invention has the following advantages:
(1) The vacuum main lens barrel structure suitable for the solar telescope can effectively avoid damage of salt fog environment to the inner structure of the main lens barrel, prevent damage of sand dust and dew on an optical system, and protect optical elements in the main lens barrel to a great extent.
(2) The invention provides a vacuum main lens barrel structure suitable for a solar telescope, and sealing rubber rings at all connecting positions are made of fluororubber materials. The inner surface of the sealed cavity of the vacuum main lens barrel adopts a black nickel plating mode, so that the main lens barrel can be ensured to have excellent air tightness.
(3) The vacuum main lens barrel structure suitable for the solar telescope greatly reduces the maintenance period and the operation cost of the solar telescope through the design of the internal structure of the vacuum main lens barrel and special process treatment.
(4) The invention is formed by pipeline metallization and integral welding, and adopts the vacuum cavity inner surface treatment technology of a specific process, so that the deflation rate of the inner material of the main telescope is well inhibited, and the maintenance period and the cost of the solar telescope are reduced.
Drawings
Fig. 1 is a schematic structural view of a vacuum main barrel structure suitable for a solar telescope according to the present invention.
Fig. 2 is a schematic view of a three-dimensional model of a vacuum main barrel structure of a solar telescope according to the present invention.
Wherein, 1 is the main window that seals, 2 is the pipeline interface, 3 is the main lens cone, 4 is the cross operation window, 5 is the cross, 6 is the spindle nose window that seals, 7 is the main mirror back cover, 8 is the main mirror adjustment lid, 9 is sealed spindle nose, 10 is the side window that seals, 11 is the vacuum gauge, 12 is manual vacuum valve.
Detailed Description
The invention will be described in detail with reference to the drawings and detailed description.
The invention relates to a vacuum main lens barrel structure suitable for a solar telescope, wherein a sealing cavity of the vacuum main lens barrel structure comprises a main sealing window 1, a main lens barrel 3, a four-way operation window 4, a four-way 5, a shaft head sealing window 6, a main lens rear cover 7, a main lens adjusting cover 8, a sealing shaft head 9 and a side sealing window 10. The main body of the sealed main lens barrel is formed by connecting a main sealing window 1, a main lens barrel 3, a four-way joint 5, a main lens rear cover 7 and a main lens adjusting cover 8 through flange screws, wherein the main sealing window 1, a side sealing window 10 and a shaft head sealing window 6 are positioned at the front end and the side surface of the main lens barrel as light transmission windows, a four-way joint operation window 4 and a sealing shaft head 9 are positioned at the middle part of the four-way joint 5 as adjustment windows, a pipeline interface 2 is an electric interface, a vacuum gauge 11 and a manual vacuum valve 12 are arranged on the end surface of the four-way joint 5, a sealed cavity is connected with a vacuum pump through the manual vacuum valve 12, and the vacuum gauge 11 is used for monitoring the air pressure value in the main lens barrel in real time.
The inner pipeline of the vacuum main lens barrel and the joint are integrally welded and formed by adopting metal materials, and sealing rubber rings at all connecting positions are made of fluororubber materials. The inner surface of the sealed cavity of the vacuum main lens barrel adopts a black nickel plating mode, so that the material air release rate is greatly reduced, and the main lens barrel is ensured to have excellent air tightness.
The vacuum main lens barrel is internally provided with optical elements such as a main lens, a secondary lens, a third lens and the like and corresponding supporting and adjusting mechanisms.
Before the solar telescope works, a vacuum pump exhaust pipeline is connected to the manual vacuum valve 12, a vacuum pump is started, and the manual vacuum valve 12 is opened to exhaust air in the main telescope. After about 30 minutes, the vacuum gauge 11 reads to the prescribed air pressure value, the manual vacuum valve 12 is closed, and the air suction line is removed.
After the solar telescope runs for a long time, when the air pressure reading of the vacuum gauge 11 exceeds a specified threshold value, the telescope master control system sends out a prompt. The above pumping operation is repeated at this time. Ensuring that the vacuum degree inside the vacuum main barrel is maintained within a certain range.
The pipeline joint at the pipeline interface 2 and the pipeline inside the main lens barrel are integrally welded and formed by adopting metal materials, so that plastic materials inside the lens barrel are reduced to the greatest extent, sealing rubber rings at all connecting positions are made of fluororubber materials, and the air release rate of the materials inside the main lens barrel is controlled. The inner surface of the sealed cavity of the vacuum main lens barrel adopts a black nickel plating mode, so that the influence of stray light on a subsequent optical system is inhibited while the air release amount of a metal material is reduced.
When the main lens barrel of the solar telescope needs to be adjusted and maintained, the manual vacuum valve 12 is opened to deflate, so that the internal air pressure of the main lens barrel rises, and after the internal and external pressures reach balance, the window sealing adjustment and maintenance are disassembled. When maintaining the main mirror system, the main mirror adjusting cover 8 needs to be disassembled; when maintaining the secondary mirror system, the side seal window 10 needs to be disassembled; when the three-mirror system is maintained, the four-way operation window 4 needs to be disassembled. During the working of the solar telescope, the main sealing window 1 should be avoided to the greatest extent. The main sealing window 1 is large in size, and the air tightness of the vacuum main lens barrel can be affected by damaging the sealing rubber strip during repeated disassembly.
Claims (6)
1. Vacuum main lens cone structure suitable for solar telescope, its characterized in that: the device consists of a main sealing window (1), a pipeline interface (2), a main mirror cylinder (3), a four-way operation window (4), a four-way joint (5), a shaft head sealing window (6), a main mirror rear cover (7), a main mirror adjusting cover (8), a sealing shaft head (9), a side sealing window (10), a vacuum gauge (11) and a manual vacuum valve (12); the main body of the vacuum main lens barrel structure is formed by connecting a main sealing window (1), a main lens barrel (3), a four-way joint (5), a main lens rear cover (7) and a main lens adjusting cover (8) through flange screws, all connecting positions are sealed by rubber strips, the main sealing window (1), a side sealing window (10) and a shaft head sealing window (6) are positioned at the front end and the side face of the main lens barrel as light passing windows, a four-way joint (4) and a sealing shaft head (9) are positioned in the middle of the four-way joint (5) as adjusting windows, a pipeline interface (2) is an electrical interface, a vacuum gauge (11) and a manual vacuum valve (12) are arranged on the end face of the four-way joint (5), a main lens barrel cavity is connected with the vacuum pump through the manual vacuum valve (12), and the vacuum gauge (11) is used for monitoring the air pressure value of the cavity in real time;
the main lens barrel structure is sealed, the vacuum cavity is pumped by a manual vacuum valve (12) to form a vacuum system, a main lens, a secondary lens, a third lens and a corresponding supporting and adjusting mechanism are arranged in the main lens barrel, when the internal mechanism of the main lens barrel is operated or adjusted, the manual vacuum valve (12) is required to be opened for deflation, the main lens barrel is not in a vacuum state any more, and after the internal pressure and the external pressure reach balance, the main sealing window, the shaft head sealing window and the side sealing window are detached.
2. The vacuum main barrel structure for a solar telescope according to claim 1, wherein: the main sealing window (1) is positioned at the forefront end of the main lens barrel structure and is the largest optical component for sealing the main lens barrel; the side sealing window (10) is positioned on the side surface of the main lens barrel and is used as an adjusting operation port of the secondary lens and the main focal position mechanism, and simultaneously releases most of solar energy which is not needed by a subsequent optical system; the four-way operation windows (4) are positioned at the side surface of the four-way (5) and are used for operating and adjusting the third mirror mechanism; the shaft head sealing window (6) is the last optical element of the main lens barrel and is a light transmission window of a subsequent system; the main mirror adjusting cover (8) is an operation window for adjusting the posture and position of the main mirror.
3. The vacuum main barrel structure for a solar telescope according to claim 1, wherein: the sealing rubber ring at the connecting position of the parts forming the vacuum cavity is made of fluororubber material, and is custom-molded, so that the surface air release amount of the rubber material is reduced.
4. The vacuum main barrel structure for a solar telescope according to claim 1, wherein: the main body structure of the vacuum main lens barrel structure is formed by welding common carbon steel materials, and in order to inhibit the air release of the inner surface material of the sealing cavity and meet the stray light requirement of an optical system, the inner surface is polished and then subjected to surface treatment of electroplating black nickel.
5. The vacuum main barrel structure for a solar telescope according to claim 1, wherein: in order to reduce the plastic pipeline inside the vacuum main lens barrel, the water pipe is made of metal materials, is integrally arranged with the main lens barrel, and is integrally welded with the joint at the pipeline interface (2) after being arranged in place.
6. The vacuum main barrel structure for a solar telescope according to claim 1, wherein: the end face of the four-way valve (5) is provided with a vacuum gauge (11), after the telescope works for a long time, when the air pressure reading of the vacuum gauge (11) exceeds a specified threshold value, the telescope master control system gives a prompt, at the moment, a vacuum pump air exhaust pipeline is required to be manually connected, a manual vacuum valve (12) is opened, air exhaust operation is repeatedly performed, and the vacuum degree inside the vacuum main lens barrel is ensured to be maintained within a certain range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111523615.9A CN114185167B (en) | 2021-12-14 | 2021-12-14 | Vacuum main lens cone structure suitable for solar telescope |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111523615.9A CN114185167B (en) | 2021-12-14 | 2021-12-14 | Vacuum main lens cone structure suitable for solar telescope |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114185167A CN114185167A (en) | 2022-03-15 |
| CN114185167B true CN114185167B (en) | 2023-09-19 |
Family
ID=80543604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111523615.9A Active CN114185167B (en) | 2021-12-14 | 2021-12-14 | Vacuum main lens cone structure suitable for solar telescope |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114185167B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11249028A (en) * | 1998-03-03 | 1999-09-17 | Nikon Corp | Sun telescope |
| CN103412400A (en) * | 2013-07-20 | 2013-11-27 | 中国科学院光电技术研究所 | Heat diaphragm adjustable type segmented supporting device for coaxial solar telescope |
| CN109856790A (en) * | 2019-02-28 | 2019-06-07 | 中国科学院云南天文台 | A kind of vacuum sealing device for the hot diaphragm of horizontal solar telescope |
| CN110398834A (en) * | 2019-07-08 | 2019-11-01 | 中国科学院光电技术研究所 | A kind of ground sealing inflatable horizontal solar telescope |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20120050854A1 (en) * | 2010-09-01 | 2012-03-01 | Capon Robert S | Remote controlled telescope cleaning system for small telescopes |
| US20120113513A1 (en) * | 2010-10-22 | 2012-05-10 | The Regents Of The University Of Colorado, A Body Corporate | Self-cleaning of optical surfaces in low-pressure reactive gas environments in advanced optical systems |
-
2021
- 2021-12-14 CN CN202111523615.9A patent/CN114185167B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11249028A (en) * | 1998-03-03 | 1999-09-17 | Nikon Corp | Sun telescope |
| CN103412400A (en) * | 2013-07-20 | 2013-11-27 | 中国科学院光电技术研究所 | Heat diaphragm adjustable type segmented supporting device for coaxial solar telescope |
| CN109856790A (en) * | 2019-02-28 | 2019-06-07 | 中国科学院云南天文台 | A kind of vacuum sealing device for the hot diaphragm of horizontal solar telescope |
| CN110398834A (en) * | 2019-07-08 | 2019-11-01 | 中国科学院光电技术研究所 | A kind of ground sealing inflatable horizontal solar telescope |
Non-Patent Citations (3)
| Title |
|---|
| 张锐 等.空间太阳望远镜中Hα双折射滤光器的设计.清华大学学报（自然科学版）.2005,第45卷(第5期),全文. * |
| 王佳英 等.自适应光学系统的混合控制方法.激光与光电子学进展.2020,第57卷(第23期),全文. * |
| 程向明 等.YNST光电导行镜机械设计.天文研究与技术.2011,第8卷(第2期),全文. * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114185167A (en) | 2022-03-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104590516B (en) | A kind of detection method of shallow water bridge pier underwater detecting robot | |
| CN105864634B (en) | A kind of portable nitrogen purging leak detection vacuumizes charger and application method | |
| CN114185167B (en) | Vacuum main lens cone structure suitable for solar telescope | |
| CN213126205U (en) | High-definition monitoring equipment for transmission line based on 5G power grid technology | |
| CN113172355B (en) | Pressure chamber test device for simulating underwater environment laser processing | |
| CN104832398A (en) | Vacuum extraction equipment | |
| CN212564437U (en) | Novel high-performance five-eccentric butterfly valve | |
| CN204010705U (en) | A kind of nuclear power station is the float assembly with sucker under water | |
| CN105351560A (en) | Full-floating ball rigidity seal ball valve | |
| CN102890341B (en) | Novel binocular magnifier | |
| CN212975315U (en) | Hydraulic loading control system for coal mill | |
| CN103576308A (en) | Fixing device of endoscope steering prism | |
| CN219102195U (en) | On-line maintenance flow-regulating pressure regulating valve set | |
| CN214197258U (en) | Electromagnetic pulse valve | |
| CN210152894U (en) | Submerged Roots blower | |
| CN214888885U (en) | Oil-well rig relief valve case pole seal structure | |
| CN218625639U (en) | Emergent drainage device of nickel titanium memory alloy production | |
| CN213271179U (en) | Pressure release valve for high-pressure gas-filled pipe | |
| CN217583336U (en) | Valve with protection mechanism | |
| CN221034233U (en) | Pneumatic balance regulating valve | |
| CN218267282U (en) | Integrated water conservancy valve copper fitting structure | |
| CN212001405U (en) | Water supply equipment overpressure protection device | |
| CN214743438U (en) | Intelligent electric control high-performance marine valve | |
| CN109058532B (en) | Check valve with safety valve | |
| CN204627910U (en) | A kind of vaccum-pumping equipment |
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 |