CN113007386B - Sealing angle valve used in low-pressure dust-containing high-temperature gas environment easy to bond - Google Patents
Sealing angle valve used in low-pressure dust-containing high-temperature gas environment easy to bond Download PDFInfo
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- CN113007386B CN113007386B CN202110327262.9A CN202110327262A CN113007386B CN 113007386 B CN113007386 B CN 113007386B CN 202110327262 A CN202110327262 A CN 202110327262A CN 113007386 B CN113007386 B CN 113007386B
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- 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
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
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- 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
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0254—Construction of housing; Use of materials therefor of lift valves with conical shaped valve members
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- 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
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0263—Construction of housing; Use of materials therefor of lift valves multiple way valves
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- 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
- F16K27/04—Construction of housing; Use of materials therefor of sliding valves
- F16K27/041—Construction of housing; Use of materials therefor of sliding valves cylindrical slide valves
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- 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
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
Abstract
The invention discloses a sealing angle valve used in a low-pressure dust-containing and easily-bonded high-temperature gas environment, which belongs to the technical field of coal chemical equipment and comprises a valve body; the method is characterized in that: a sliding valve core is sleeved in the valve body; the other end of the valve rod is provided with a compression sealing structure, and the side wall of the valve body is provided with a cleaning liquid inlet and a cleaning liquid outlet for cleaning the inner cavity of the valve core and a nitrogen interface; the movable ring of the compression seal is arranged in a conical structure, the static ring of the compression seal is provided with an inclined plane matched with the conical structure, and the spring leaf dust guard is provided with an extrusion tip sealing ring through elastic connection, so that the invention has the beneficial effects that: the valve outlet is switched to be blocked by the communicated state when the valve inlet is blocked by the compression sealing structure, so that a valve core forms a closed space, the closed space can be independently cleaned and protected by nitrogen, and the safety factor can be increased by isolating oxygen.
Description
The technical field is as follows:
the invention belongs to the technical field of coal chemical equipment, and particularly relates to a sealing angle valve used in a low-pressure dust-containing high-temperature gas environment with high adhesion.
Background art:
in some chemical production in the environment containing dust, such as coal gasification, coking, coal pyrolysis and other processes, the conditions of low pressure, high temperature, high dust content, easy condensation of gas phase into high-viscosity liquid phase and explosion danger exist. Under the condition, the traditional butterfly valve and gate valve are easily stuck or blocked by dust or sticky condensate when being closed for a long time, and when the valve is required to be opened quickly, the valve core is stuck and cannot be opened or the situation that the inlet of the valve is blocked even if the valve core is opened is avoided, so that the continuous production is not facilitated, and safety accidents are caused.
Particularly, the condensed coal tar is easy to condense under the negative pressure environment to stick or block the valve core of the valve, and the valve core is difficult to open when the pressure in the oil gas pouring device is too high.
The invention content is as follows:
in order to solve the problems and overcome the defects of the prior art, the invention provides the sealing angle valve used in a high-temperature, low-pressure, oil-gas-dust-containing three-phase environment;
the first technical problem to be solved is that: the gate valve is easy to be stuck or blocked by dust or viscous condensate when the gate valve is in a closed state for a long time and cannot be opened under the conditions of low pressure, high temperature, high dust content and easy condensation of gas phase into high-viscosity liquid phase.
The specific technical scheme for solving the technical problems comprises the following steps: the sealing angle valve used in the environment with high temperature, low pressure, dust and easy adhesion comprises a valve body; the cross section is set to the valve body and is T style of calligraphy cast structure, and the both ends mouth of the horizontal end of valve body is provided with valve import and power structure respectively, and the vertical end of valve body is provided with valve export, its characterized in that: the outer wall of the valve body at the inlet end of the valve is fixed with equipment through a flange, and a sliding valve core is sleeved in the valve body;
the valve core is arranged into a hollow cylindrical structure with one open end, a fixed valve rod penetrates through the axis of the valve core, and one end of the valve rod extends to the outer side of the valve body and is connected with a power structure for driving the valve core to slide;
the power structure comprises a driving part and a tensioner, and a telescopic rod of the driving part is connected with the valve rod through the tensioner; the other end of the valve rod is provided with a compression sealing structure, and the compression sealing structure comprises a compression sealing static ring, a compression sealing moving ring and a spring piece dust guard;
a cleaning liquid inlet and a cleaning liquid outlet for cleaning the inner cavity of the valve core and a nitrogen interface are formed in the side wall of the valve body; a valve core gas outlet matched with the valve outlet, a valve core cleaning liquid inlet matched with the cleaning liquid inlet and a valve core nitrogen interface matched with the nitrogen interface are formed in the side wall of the valve core;
one end of the valve body is fixed on the oil-gas pouring device through a flange.
The movable ring of the compression seal is arranged in a conical structure, the static ring of the compression seal is provided with an inclined plane matched with the conical structure, the inclined plane is provided with a ring groove, and a graphite sealing ring for sealing is embedded in the ring groove;
the spring leaf dust guard sets up the extrusion pinnacle sealing ring through elastic connection, the extrusion pinnacle sealing ring sets up in the outside that compresses tightly sealed quiet ring, the spring leaf dust guard still is provided with the hem structure.
The cleaning liquid inlet is matched with the valve core cleaning liquid inlet, the nitrogen interface is communicated with the valve core nitrogen interface, and the cleaning liquid inlet is communicated with the cleaning liquid outlet through the valve core cleaning liquid inlet; the valve outlet is not communicated with the valve core air outlet in a staggered way.
The cleaning liquid inlet is not communicated with the valve core cleaning liquid inlet, the nitrogen interface is not communicated with the valve core nitrogen interface in a staggered manner, and the cleaning liquid inlet is not communicated with the cleaning liquid outlet in a staggered manner; the valve outlet is communicated with the valve core air outlet.
And the inner wall of the valve body is provided with a rotation stopping guide rail in sliding fit with the valve core.
The valve core is provided with a preset number of supports for fixing the valve rods at the open end, one end of each support is fixed with the outer wall of each valve rod, and the other end of each support is fixed with the inner wall of the valve core.
The invention has the beneficial effects that:
the device can realize quick opening and smooth operation in the process environment with high temperature, high dust content and easily condensed high-viscosity liquid phase in the gas phase, and can be connected with nitrogen and cleaning liquid to realize positive pressure nitrogen sealing and on-line cleaning functions;
the device utilizes the sliding valve core and the valve rod, realizes that the valve outlet is simultaneously switched from a communicated state to a sealing state while the inlet of the valve is sealed and sealed by utilizing the compression sealing structure, thereby forming a closed space by the valve core, and can also realize independent cleaning and nitrogen protection of the closed space, thereby being capable of isolating oxygen and increasing the safety factor, avoiding the influence of external oxygen and internal oil gas on the operation, avoiding the problem that the gate valve is easily stuck or blocked by dust or sticky condensate when being closed for a long time, and being incapable of being opened because the valve core is stuck when needing to be quickly opened;
the compaction seal structure that sets up has multichannel seal structure, and under the effect of hydraulic cylinder or cylinder, the foreign matter such as the dregs of fat that can clear up the adhesion is extruded mutually to the dynamic seal face and static seal face, and the spring leaf dust guard has certain elasticity simultaneously, not only can separate the dirt also can avoid adhering difficult opening.
Description of the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of another embodiment of the present invention, wherein:
1. a drive section; 2. a tensioner; 3. a valve stem; 4. a valve outlet; 5. a valve body; 6. a valve core; 7. extruding the pointed sealing ring; 8. compressing the sealing static ring; 9. compressing the sealing movable ring; 10. a leaf spring dust guard; 11. a nitrogen interface; 12. a cleaning fluid inlet; 13. a valve core cleaning fluid inlet; 14. a valve core nitrogen interface; 15. a cleaning liquid outlet; 16. and a valve core air outlet.
The specific implementation mode is as follows:
in the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "left", "right", "rear", "lower left", "upper right", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplification of description, but do not indicate or imply that the device or element being referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the scope of the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The specific implementation mode of the invention is as follows: the sealing angle valve used in the environment with high temperature, low pressure, dust and easy adhesion comprises a valve body 5; valve body 5 sets to the cross section and is T style of calligraphy cast structure, and the both ends mouth of the horizontal end of valve body 5 is provided with valve import and power structure respectively, and the vertical end of valve body 5 is provided with valve export 4, its characterized in that: the outer wall of a valve body 5 at the inlet end of the valve is fixed with equipment through a flange, and a sliding valve core 6 is sleeved in the valve body 5;
the valve core 6 is arranged into a hollow cylindrical structure with one open end, a fixed valve rod 3 is arranged at the axis of the valve core 6 in a penetrating way, and one end of the valve rod 3 extends to the outer side of the valve body 5 and is connected with a power structure for driving the valve core 6 to slide;
the power structure comprises a driving part 1 and a tensioner 2, wherein a telescopic rod of the driving part 1 is connected with a valve rod 3 through the tensioner 2; the other end of the valve rod 3 is provided with a compression sealing structure, and the compression sealing structure comprises a compression sealing static ring 8, a compression sealing dynamic ring 9 and a spring piece dust guard 10;
a cleaning liquid inlet 12, a cleaning liquid outlet 15 and a nitrogen interface 11 for cleaning the inner cavity of the valve core 6 are formed in the side wall of the valve body 5; and a valve core air outlet 16 matched with the valve outlet 4, a valve core cleaning liquid inlet 13 matched with the cleaning liquid inlet 12 and a valve core nitrogen interface 14 matched with the nitrogen interface 11 are formed in the side wall of the valve core 6.
One end of the valve body 5 is connected with the oil gas pouring device through a flange.
The pressing sealing movable ring 9 is arranged in a conical structure, the pressing sealing static ring 8 is provided with an inclined plane matched with the conical structure, a ring groove is formed in the inclined plane, and a graphite sealing ring for sealing is embedded in the ring groove;
the spring leaf dust guard 10 sets up extrusion pinnacle sealing ring 7 through elastic connection, extrusion pinnacle sealing ring 7 sets up in the outside that compresses tightly sealed stationary ring 8, spring leaf dust guard 10 still is provided with the hem structure.
The cleaning liquid inlet 12 is matched with the valve core cleaning liquid inlet 13, the nitrogen interface 11 is communicated with the valve core nitrogen interface 14, and the cleaning liquid inlet 12 is communicated with the cleaning liquid outlet 15 through the valve core cleaning liquid inlet 13; the valve outlet 4 is not communicated with the valve core air outlet 16 in a staggered way.
The cleaning liquid inlet 12 is not communicated with the valve core cleaning liquid inlet 13, the nitrogen interface 11 is not communicated with the valve core nitrogen interface 14 in a staggered manner, and the cleaning liquid inlet 12 is not communicated with the cleaning liquid outlet 15 in a staggered manner; the valve outlet 4 is communicated with the valve core air outlet 16.
And the inner wall of the valve body 5 is provided with a rotation stopping guide rail in sliding fit with the valve core 6.
The open end of the valve core 6 is provided with a preset number of supports for fixing the valve rods 3, one end of each support is fixed with the outer wall of each valve rod 3, and the other end of each support is fixed with the inner wall of the valve core 6.
It is noted that the invention relates to a sealing angle valve used in low-pressure, dusty and easily-bonded high-temperature gas environment, and when in specific work,
the sealing angle valve comprises a valve body, a spring leaf dust guard, a compression sealing piece, a sliding sealing piece, a tensioner and an oil cylinder, and auxiliary accessories comprise a nitrogen supply device, a washing liquid circulation cleaning device and the like. Under the cooperation of the auxiliary part, the functions of nitrogen positive pressure isolation and online cleaning can be realized. The working principle is as follows:
1. when the angle valve needs to be closed, the oil cylinder pulls the tensioner to apply force, then the valve rod is pulled to enable the sealing element to be meshed, the compression sealing movable ring 9 compresses the graphite sealing ring embedded on the compression sealing static ring 8, and the first sealing is realized; the leaf spring dustproof plate 10 is driven to tightly press and extrude the pointed top sealing ring 7, sealing is realized under the action of preset deformation force, the dustproof effect is achieved, meanwhile, the valve rod acts to drive the sliding valve core to act, and the valve outlet 4 and the valve core air outlet 16 are completely staggered to form a second sealing;
2. when the angle valve is required to be opened, the oil cylinder is pushed out to drive the tensioner to be loosened, hydraulic pressure directly acts on the valve rod to drive the dust cover to separate and drive the compression sealing element to separate to form a channel, and the oil cylinder is further pushed out until the tensioner reaches a limiting position. Meanwhile, the valve rod moves to drive the sliding valve core to move, and the valve outlet 4 and the valve core air outlet 16 are completely aligned to form a channel.
3. When the positive pressure isolation and sealing of nitrogen are daily needed, the cleaning inlet and the cleaning outlet are closed, and the decompressed nitrogen is introduced from the nitrogen interface.
4. When the valve is closed, the valve can be cleaned on line, the nitrogen interface is closed or plugged, cleaning liquid is flushed from the cleaning liquid inlet and is discharged from the cleaning outlet, and the cleaning can be performed after the operation is circulated for a period of time. If the cleaning oil can be used in hot alkali solution, citric acid can be used for cleaning scale, and steam or hot ammonia water can be used for cleaning tar.
The device is suitable for the on-off problems of high temperature, high dust content and easy condensation of gas phase into high-viscosity liquid phase in chemical production, is particularly suitable for being used in the traditional coking industry, low-temperature coal pyrolysis and oil-gas-dust-containing three-phase chemical devices, and has strong adaptability and reliability on severe conditions of high temperature, easy condensation of oil mist, easy adhesion, large dust amount and the like.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. The sealing angle valve used in the environment with high temperature, low pressure, dust and easy adhesion comprises a valve body (5); valve body (5) set to the cross section and are T style of calligraphy cast structure, and the both ends mouth of the horizontal end of valve body (5) is provided with valve import and power structure respectively, and the vertical end of valve body (5) is provided with valve export (4), its characterized in that: the outer wall of the valve body (5) at the inlet end of the valve is fixed with equipment through a flange, and a sliding valve core (6) is sleeved in the valve body (5);
the valve core (6) is arranged to be a hollow cylindrical structure with one open end, the shaft center of the valve core (6) is fixedly provided with the valve rod (3) in a penetrating way, and one end of the valve rod (3) extends to the outer side of the valve body (5) and is connected with a power structure for driving the valve core (6) to slide;
the power structure comprises a driving part (1) and a tensioner (2), wherein a telescopic rod of the driving part (1) is connected with a valve rod (3) through the tensioner (2); the other end of the valve rod (3) is provided with a compression sealing structure which comprises a compression sealing static ring (8), a compression sealing dynamic ring (9) and a spring leaf dust guard (10),
an extrusion pointed top sealing ring (7) and a compression sealing static ring (8) are arranged on the valve body (5), a compression sealing movable ring (9) and a spring leaf dust guard (10) are arranged at one end of the valve rod (3), and the compression sealing movable ring (9) compresses a graphite sealing ring embedded in the compression sealing static ring (8); the spring leaf dust guard (10) compresses and extrudes the pointed sealing ring (7);
a cleaning liquid inlet (12) and a cleaning liquid outlet (15) which are used for cleaning the inner cavity of the valve core (6) and a nitrogen interface (11) are formed in the side wall of the valve body (5); a valve core air outlet (16) matched with the valve outlet (4), a valve core cleaning liquid inlet (13) matched with the cleaning liquid inlet (12) and a valve core nitrogen interface (14) matched with the nitrogen interface (11) are formed in the side wall of the valve core (6);
when the angle valve is closed and cleaned, the cleaning liquid inlet (12) is matched with the valve core cleaning liquid inlet (13), the nitrogen interface (11) is communicated with the valve core nitrogen interface (14), and the cleaning liquid inlet (12) is communicated with the cleaning liquid outlet (15) through the valve core cleaning liquid inlet (13); the valve outlet (4) is not communicated with the valve core air outlet (16) in a staggered way;
when the angle valve is opened, the cleaning liquid inlet (12) is not communicated with the valve core cleaning liquid inlet (13), the nitrogen connector (11) is not communicated with the valve core nitrogen connector (14) in a staggered mode, and the cleaning liquid inlet (12) is not communicated with the cleaning liquid outlet (15); the valve outlet (4) is communicated with the valve core air outlet (16).
2. The sealing angle valve used in the environment with high temperature, low pressure, dust and easy adhesion according to claim 1, characterized in that one end of the valve body (5) is connected with an oil-gas pouring device through a flange.
3. The sealing angle valve used in the environment with high temperature, low pressure, dust and easy adhesion according to claim 1 or 2, characterized in that the pressing sealing dynamic ring (9) is arranged in a conical structure, the pressing sealing static ring (8) is provided with an inclined plane matched with the conical structure, the inclined plane is provided with a ring groove, and a graphite sealing ring for sealing is embedded in the ring groove;
the extrusion tip sealing ring (7) is arranged on the outer side of the compression sealing static ring (8), and the spring leaf dust-proof plate (10) is further provided with a folding edge structure.
4. The sealing angle valve used in the environment with high temperature and low pressure, dust and easy adhesion as claimed in claim 1, characterized in that the inner wall of the valve body (5) is provided with a rotation stopping guide rail in sliding fit with the valve core (6).
5. The sealing angle valve used in the environment with high temperature and low pressure, dust and easy adhesion as claimed in claim 1, wherein the open end of the valve core (6) is provided with a preset number of brackets for fixing the valve rod (3), one end of each bracket is fixed with the outer wall of the valve rod (3), and the other end of each bracket is fixed with the inner wall of the valve core (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110327262.9A CN113007386B (en) | 2021-03-26 | 2021-03-26 | Sealing angle valve used in low-pressure dust-containing high-temperature gas environment easy to bond |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110327262.9A CN113007386B (en) | 2021-03-26 | 2021-03-26 | Sealing angle valve used in low-pressure dust-containing high-temperature gas environment easy to bond |
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| Publication Number | Publication Date |
|---|---|
| CN113007386A CN113007386A (en) | 2021-06-22 |
| CN113007386B true CN113007386B (en) | 2022-05-20 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110327262.9A Active CN113007386B (en) | 2021-03-26 | 2021-03-26 | Sealing angle valve used in low-pressure dust-containing high-temperature gas environment easy to bond |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2564805Y (en) * | 2002-08-31 | 2003-08-06 | 董汉翔 | Special angle valve |
| CN204592366U (en) * | 2015-04-07 | 2015-08-26 | 武汉汉德阀门仪表有限公司 | Angle stroke angle valve |
| CN205207768U (en) * | 2015-12-23 | 2016-05-04 | 黑龙江兴和生物科技有限公司 | Aseptic sample valve convenient to wash |
| CN205278451U (en) * | 2015-12-30 | 2016-06-01 | 洛阳涧光特种装备股份有限公司 | Tee bend flow divider |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014107174A1 (en) * | 2014-05-21 | 2015-11-26 | Thyssenkrupp Ag | Adjusting device for actuating an element within a gas space through which coke oven gas flows and method for operating the adjusting device |
| RU2017127703A (en) * | 2016-08-10 | 2019-02-05 | Бейджинг Хуаши Юнайтед Энерджи Технолоджи энд Девелопмент Ко., Лтд. | REDUCING VALVE AND PRESSURE REDUCTION SYSTEM |
-
2021
- 2021-03-26 CN CN202110327262.9A patent/CN113007386B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2564805Y (en) * | 2002-08-31 | 2003-08-06 | 董汉翔 | Special angle valve |
| CN204592366U (en) * | 2015-04-07 | 2015-08-26 | 武汉汉德阀门仪表有限公司 | Angle stroke angle valve |
| CN205207768U (en) * | 2015-12-23 | 2016-05-04 | 黑龙江兴和生物科技有限公司 | Aseptic sample valve convenient to wash |
| CN205278451U (en) * | 2015-12-30 | 2016-06-01 | 洛阳涧光特种装备股份有限公司 | Tee bend flow divider |
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| CN113007386A (en) | 2021-06-22 |
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