CN107830181B - Air flow control valve unit - Google Patents
Air flow control valve unit Download PDFInfo
- Publication number
- CN107830181B CN107830181B CN201711114662.1A CN201711114662A CN107830181B CN 107830181 B CN107830181 B CN 107830181B CN 201711114662 A CN201711114662 A CN 201711114662A CN 107830181 B CN107830181 B CN 107830181B
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- Prior art keywords
- gasket
- hollow part
- hollow
- air inlet
- valve seat
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- 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.)
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- 239000002184 metal Substances 0.000 claims description 3
- 239000002985 plastic film Substances 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
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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
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Lift Valve (AREA)
Abstract
The invention provides an airflow control valve unit, which comprises a valve body, a valve seat, a first air inlet gasket, a second air inlet gasket and an opening and closing gasket. The valve body comprises a hollow columnar body part with internal and external threads and a conical body part connected with the hollow columnar body part into a whole; the valve seat is a hollow cylinder threadably secured in the cylindrical body portion of the valve body; the hollow part of the valve seat comprises a first hollow part, a second hollow part and a third hollow part, the inner diameters of the first hollow part, the second hollow part and the third hollow part are sequentially reduced, four grooves are uniformly formed in the side wall of the upper part of the valve seat, and the bottoms of the grooves are lower than the top of the inner wall of the third hollow part and the depth of the grooves reaches the inner wall of the third hollow part; the first air inlet gasket is arranged in the first hollow part; the second air inlet gasket is placed at the bottom of the second hollow part; the opening and closing gasket is placed in the second hollow portion and movably located at a position between the first air intake gasket and the second air intake gasket.
Description
Technical Field
The invention belongs to the field of engineering machinery control, and particularly relates to an airflow control valve unit.
Background
The valve for controlling the gas flow direction is generally driven, has a complex structure and has a single gas inlet. In practical applications, the direction of the source of the gas, such as the wind direction, is uncertain, and in this case, the problems of how to effectively collect and use the gas, and controlling the flow direction of the gas in the pipeline are not effectively solved.
Disclosure of Invention
To solve the existing technical problems, the present invention provides an airflow control valve unit.
In order to achieve the above object, the technical solution of the embodiment of the present invention is as follows:
According to a first aspect of the present invention, there is provided an air flow control valve unit comprising a valve body, a valve seat, a first air intake gasket, a second air intake gasket, and an opening and closing gasket, wherein the valve body comprises a hollow cylindrical body portion and a cone portion integrally connected with the cylindrical body portion, an inner diameter of the cylindrical body portion is larger than an inner diameter of a portion of the cone portion connected with the cylindrical body portion, the cylindrical body portion has an internal thread and an external thread; the valve seat is a hollow cylinder with external threads and can be fixed in the columnar body part of the valve body in a threaded manner; the hollow part of the valve seat comprises a first hollow part, a second hollow part and a third hollow part, wherein the first hollow part is positioned at one end of the valve seat, which is close to the conical body part of the valve body, the second hollow part is positioned between the first hollow part and the third hollow part, the inner diameter of the first hollow part is larger than the inner diameter of the second hollow part, and the inner diameter of the second hollow part is larger than the inner diameter of the third hollow part; four grooves are uniformly formed in the side wall of the upper part of one end, close to the conical body part of the valve seat, the bottoms of the grooves are lower than the top of the inner wall of the third hollow part of the valve seat, and the depth of the grooves reaches the inner wall of the third hollow part of the valve seat; the first air inlet gasket and the second air inlet gasket are two round hollowed-out hard sheets with different diameters and same shapes; the opening and closing gasket is a round solid hard sheet; the first air inlet gasket is placed in the first hollow part of the valve seat and is matched with the first air inlet gasket in size; the second air inlet gasket is matched with the inner diameter of the second hollow part of the valve seat, the thickness of the second air inlet gasket is smaller than the height of the second hollow part, and the second air inlet gasket is placed at the bottom of the second hollow part of the valve seat; the opening and closing gasket and the second air inlet gasket are the same in size, are placed in the second hollow part of the valve seat and are movably located between the first air inlet gasket and the second air inlet gasket.
Optionally, the valve seat has a small portion exposed to the cylindrical body portion of the valve body when threadedly secured therein, the exposed portion having no external threads.
Optionally, the first air inlet gasket and the second air inlet gasket are middle circular parts and four surrounding fan-shaped parts are hollowed circular hollowed hard sheets.
Optionally, the first air intake gasket and the second air intake gasket are metal sheets.
Optionally, the opening and closing gasket is a round hard plastic sheet.
According to a second aspect of the present invention, there is provided an air flow control valve device comprising the air flow control valve unit according to the first aspect, and a cavity, wherein the cavity is uniformly distributed with four threaded mounting holes in a direction perpendicular to an axis thereof, an inner diameter of the mounting holes being adapted to an outer diameter of a cylindrical body portion of a valve body of the air flow control valve unit so that the cylindrical body portion of the valve body of the air flow control valve unit can be screwed into the mounting holes; the bottom surface of the cavity is provided with a plurality of exhaust ports.
Drawings
In the drawings (which are not necessarily drawn to scale), like numerals may describe similar components in different views. Like reference numerals having different letter suffixes may represent different instances of similar components. The drawings illustrate generally, by way of example and not by way of limitation, various embodiments discussed herein.
FIG. 1A illustrates a cross-sectional view of an airflow control valve unit according to an embodiment of the invention;
FIG. 1B illustrates a top view of the airflow control valve unit of FIG. 1A;
FIG. 1C illustrates a perspective view of the airflow control valve unit of FIG. 1A;
FIG. 2A shows a cross-sectional view of the valve body in its axial direction;
FIG. 2B shows a top view of the valve body;
FIG. 2C shows a perspective view of the valve body;
FIG. 3A shows a front view of a valve seat;
FIG. 3B shows a top view of the valve seat;
FIG. 3C shows a perspective view of the valve seat;
FIG. 4A illustrates a top view of one embodiment of a first air intake gasket;
FIG. 4B illustrates a perspective view of the first intake gasket shown in FIG. 4A;
FIG. 5A illustrates a top view of one embodiment of a second air intake gasket;
FIG. 5B illustrates a perspective view of the second intake gasket shown in FIG. 5A;
FIG. 6A shows a front view of the start-stop washer;
FIG. 6B shows a top view of the start and stop washer;
fig. 7 shows a schematic structural view of an air flow control valve device according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
FIG. 1A illustrates a cross-sectional view of an airflow control valve unit according to an embodiment of the invention; FIG. 1B shows a top view of the airflow control valve unit; FIG. 1C shows a perspective view of the airflow control valve unit of FIG. 1A. As shown in fig. 1A, the air flow control valve unit 100 of the present invention includes a valve body 1, a valve seat 2, a first air intake gasket 3, a second air intake gasket 4, and an opening and closing gasket 5.
Wherein the valve body 1 is a hollow internal and external thread device (i.e. threads are arranged on the inner and outer parts) and is in a horn-like shape, and comprises a hollow columnar body part 12 and a conical body part 11 connected with the columnar body part into a whole, wherein the internal and external threads of the valve body 1 are positioned on the columnar body part 12, and the internal and external threads of the conical body part 11 are not required to be provided with threads. In addition, the inner diameter of the columnar body portion 12 is larger than the inner diameter of the connecting portion of the tapered body portion 11 with the columnar body portion 12, as shown in fig. 1A and 2A, wherein fig. 2A shows a cross-sectional view of the valve body 1 in the axial direction thereof, fig. 2B shows a top view of the valve body 1, and fig. 2C shows a perspective view of the valve body 1. In addition, as shown in fig. 2A to 2C, two notches of the same size are provided on the surface of the cone portion 11 of the valve body 1 at both ends of a diameter line passing through the center of the cone cross section, the notches being provided to facilitate the attachment and detachment of the valve body 1 to and from other members.
The valve seat 2 is a cylindrical, hollow, externally threaded device (i.e., threaded on the exterior of the device). The valve seat 2 is fitted to the cylindrical body portion 12 of the valve body 1 and can be screwed into the cylindrical body portion 12 of the valve body 1, as shown in fig. 1A, the valve seat 2 may have a portion exposed to the cylindrical body portion 12 of the valve body 1, and further, alternatively, a portion of the valve seat 2 exposed to the cylindrical body portion 12 of the valve body 1 may have no external screw thread. Fig. 3A shows a front view of the valve seat 2, fig. 3B shows a top view of the valve seat 2, and fig. 3C shows a perspective view of the valve seat 2. The hollow part of the valve seat 2 has three hollow parts with different inner diameters, a first hollow part 21 is located at one end of the valve seat 2 where the valve body 1 is fitted, and the depth of the first hollow part 21 is typically smaller than one quarter of the height of the valve seat 2. The second hollow portion 22 is located between the first hollow portion 21 and the third hollow portion 23, the second hollow portion 22 having an inner diameter smaller than that of the first hollow portion 21, and the third hollow portion 23 having an inner diameter smaller than that of the second hollow portion 22. Wherein, the second hollow portion 22 has a height capable of accommodating the second air intake gasket 4 and the opening/closing gasket 5 and capable of making the second air intake gasket 4 and the opening/closing gasket 5 have a certain interval when separated. In addition, four grooves 6 as ventilation notches are uniformly formed in the upper side wall of one end of the valve seat 2 near the cone-shaped body portion 11 of the valve body 1, the depth of the grooves 6 reaches the inner wall of the third hollow portion of the valve seat 2, and the length of the grooves 6 (i.e., the length along the axial direction of the cylindrical body of the valve seat 2) is opened from the first hollow portion 21 of the valve seat 2 all the way to below the top of the inner wall of the third hollow portion 23 of the valve seat 2, as shown in fig. 3B and 3C.
Alternatively, two openings 25 are provided on one diameter line of the circular surface of the valve seat 2 exposed to one end of the cylindrical body portion 12 of the valve body 1, as shown in fig. 3A and 3C, the pair of openings 25 being used for easy installation or removal of the valve seat 2.
The first air intake gasket 3 is a circular hollowed-out hard sheet, as shown in fig. 4A and 4B, fig. 4A shows a top view of one embodiment of the first air intake gasket 3, and fig. 4B shows a perspective view of the first air intake gasket 3 shown in fig. 4A. The middle circular portion and the surrounding four segments are hollowed out as shown in fig. 4A. The first air intake gasket 3 is sized to fit the internal shape of the first hollow portion 21 of the valve seat 2, i.e., the first air intake gasket 3 has an inner diameter slightly smaller than the inner diameter of the first hollow portion 21 and is substantially just received in the first hollow portion of the valve seat 2, as shown in fig. 1A.
The second air intake gasket 4 is also a circular hollowed-out hard sheet, as shown in fig. 1A and fig. 5A and 5B, fig. 5A shows a top view of an embodiment of the second air intake gasket 4, and fig. 5B shows a perspective view of the second air intake gasket 4 shown in fig. 5A. The middle circular portion and the surrounding four segments are hollowed out as shown in fig. 5A. The second air intake gasket 4 has an inner diameter that is adapted to the inner diameter of the second hollow portion 22 of the valve seat 2, but a thickness that is smaller than the height of the second hollow portion 22 (i.e. the length on the cylinder axis of the valve seat 2), and in use the second air intake gasket 4 is placed at the bottom of the second hollow portion 22 of the valve seat 2. The second intake gasket 4 may be fixed to the bottom of the second hollow portion 22 of the valve seat 2 or may be movably installed in the second hollow portion 22.
As can be seen from the above, the first air intake gasket 3 and the second air intake gasket 4 are two circular hollow hard sheets with different diameters and similar shapes, and the circular hollow hard sheets may be, for example, circular hollow metal sheets. Alternatively, the first air intake gasket 3 and the second air intake gasket 4 are not limited to the foregoing embodiments, but may be other hollow manners, for example, hollow in a circular area only in the middle, hollow in a symmetrical sector area only, or the like, which is not limited by the present invention.
The opening and closing gasket 5 is a circular piece, and has no hollow portion and no hollow portion, as shown in fig. 6A and 6B, fig. 6A shows a front view of the opening and closing gasket 5, and fig. 6B shows a top view of the opening and closing gasket 5. The opening and closing gasket 5 is the same in size as the second air intake gasket 4, and is movably placed in the second hollow portion 22 of the valve seat 2, as shown in fig. 1A, between the first air intake gasket 3 and the second air intake gasket 4. The opening and closing gasket 5 can be, for example, a solid and round hard plastic sheet, is light and thin in material, and can enhance the sensitivity to wind power.
With the gas flow control valve unit 100 of the present invention, when gas is blown in from the cone portion 11 of the valve body 1, the opening and closing gasket 5 is under the action of gas flow power to seal the second gas inlet gasket 4 of the valve seat 2, and the gas enters the third hollow portion 23 of the valve seat 2 through the groove 6 of the valve seat 2, thereby being discharged; however, when the gas enters from the third hollow portion 23 of the valve seat 2, the opening and closing gasket 5 is moved to the first air intake gasket 3 by the power of the gas flow and closes the opening thereof, so that the gas cannot enter the cone portion 11 of the valve body 1, i.e., cannot be discharged from the cone portion 11 of the valve body 1, thereby controlling the direction of the gas flow in this way.
In the specific assembly of the airflow control valve unit of the present invention, as shown in fig. 1, the second intake gasket 4 is first placed at the bottom of the second hollow portion 22 of the valve seat 2; the start-stop gasket 5 is then placed in the second hollow portion 22 of the valve seat 2 and the first intake gasket 3 is placed in the first hollow portion 21 of the valve body 2. The valve seat 2 is then screwed into the cylindrical body portion 12 of the valve body 1, thereby forming an air flow control valve unit 100, as shown in fig. 1A.
The present invention may be used to make an airflow control valve assembly 200. Fig. 7 shows a schematic diagram of an airflow control valve assembly 200 according to an embodiment of the present invention. As shown in fig. 7, the air flow control valve device 200 includes a chamber 8 and four identical air flow control valve units 7a, 7b, 7c, and 7d mounted on the side wall of the chamber 8, and the air flow control valve units 7a, 7b, 7c, and 7d employ the air flow control valve unit 100 described above. The cavity 8 is uniformly distributed with four mounting holes with internal threads in a direction perpendicular to its axis (or on its side), the inner diameter of which is adapted to the outer diameter of the cylindrical body portion 12 of the valve body 1 of the air flow control valve units 7a, 7b, 7c, and 7d, so that the cylindrical body portion 12 of the valve body 1 of the air flow control valve units 7a, 7b, 7c, and 7d can be respectively screwed into the four mounting holes. In addition, a plurality of exhaust ports 9, for example, 4 exhaust ports, are provided on the bottom surface of the chamber 8.
The following illustrates the operation of the airflow control valve assembly 200 of the present invention: when the gas enters from the direction of the valve body 1 of the gas flow control valve unit 7a, the opening and closing gasket 5 is acted by the gas flow power to seal the second air inlet gasket 4 of the valve seat 2, and the gas enters the third hollow part 23 of the valve seat 2 through the groove 6 of the valve seat 2 and then enters the cavity 8. The gas entering the cavity 8 also enters the third hollow part 23 of the valve seat 2 of the airflow control valve units 7b, 7c and 7d, and the opening and closing gasket 5 in the three airflow control valve units is moved to the position of the first air inlet gasket 3 due to the action of airflow power to seal the first air inlet gasket, so that the control gas cannot flow out of the three airflow control valve units, and the gas entering the cavity 8 can only be discharged from the air outlet 9 below the air inlet gasket. The air flow control valve device of the invention realizes the function of collecting air in different directions, ensures that the air can be discharged from the air outlet 9 only, and avoids air leakage. Similarly, the gas respectively introduced from the gas flow control valve units 7b, 7c, 7d is discharged through the exhaust ports as described above.
Typically, the airflow control valve unit of the present invention as a whole may be removed and installed directly when the airflow control valve assembly of the present invention is assembled.
The air flow control valve device can arrange a plurality of air flow control valve units at multiple angles, can efficiently collect the air in all directions, and can automatically control the flow direction of the collected air in all directions in the pipeline by opening and closing the gasket. In addition, the opening and closing gasket is light and thin, has small resistance, can effectively realize the control of gas flow direction, prevents gas leakage, and improves the control performance of the valve.
In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the invention may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Furthermore, the foregoing is only illustrative of the principles and preferred embodiments of the present invention. It should be noted that several other variants are possible to those skilled in the art on the basis of the principle of the invention, which variants are also considered to fall within the scope of the invention.
Furthermore, those skilled in the art will appreciate that combinations of features of the different embodiments are meant to be within the scope of the invention and form the different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements.
Claims (6)
1. The air flow control valve unit is characterized by comprising a valve body, a valve seat, a first air inlet gasket, a second air inlet gasket and an opening and closing gasket, wherein,
The valve body comprises a hollow columnar body part and a conical body part connected with the columnar body part into a whole, the inner diameter of the columnar body part is larger than that of the connecting part of the conical body part and the columnar body part, and the columnar body part is provided with an internal thread and an external thread;
The valve seat is a hollow cylinder with external threads and can be fixed in the columnar body part of the valve body in a threaded manner; the hollow part of the valve seat comprises a first hollow part, a second hollow part and a third hollow part, wherein the first hollow part is positioned at one end of the valve seat, which is close to the conical body part of the valve body, the second hollow part is positioned between the first hollow part and the third hollow part, the inner diameter of the first hollow part is larger than the inner diameter of the second hollow part, and the inner diameter of the second hollow part is larger than the inner diameter of the third hollow part; four grooves are uniformly formed in the side wall of the upper part of one end, close to the conical body part of the valve seat, the bottoms of the grooves are lower than the top of the inner wall of the third hollow part of the valve seat, and the depth of the grooves reaches the inner wall of the third hollow part of the valve seat;
The first air inlet gasket and the second air inlet gasket are two round hollowed-out hard sheets with different diameters and same shapes;
the opening and closing gasket is a round solid hard sheet;
The first air inlet gasket is placed in the first hollow part of the valve seat and is matched with the first air inlet gasket in size; the second air inlet gasket is matched with the inner diameter of the second hollow part of the valve seat, the thickness of the second air inlet gasket is smaller than the height of the second hollow part, and the second air inlet gasket is placed at the bottom of the second hollow part of the valve seat; the opening and closing gasket and the second air inlet gasket are the same in size, are placed in the second hollow part of the valve seat and are movably located between the first air inlet gasket and the second air inlet gasket.
2. The airflow control valve unit according to claim 1, wherein,
The valve seat has a small portion exposed to the cylindrical body portion of the valve body when threadedly secured therein, the exposed portion being devoid of external threads.
3. The airflow control valve unit according to claim 1 or 2, characterized in that,
The first air inlet gasket and the second air inlet gasket are middle round parts and four surrounding fan-shaped parts are hollow round hollow hard sheets.
4. A gas flow control valve unit according to claim 3, wherein,
The middle round part of the round hollowed-out hard sheet and the four surrounding fan-shaped parts are hollowed-out.
5. A gas flow control valve unit according to claim 3, wherein,
The first air inlet gasket and the second air inlet gasket are metal sheets.
6. The airflow control valve unit according to claim 1 or 2, characterized in that,
The opening and closing gasket is a round hard plastic sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711114662.1A CN107830181B (en) | 2017-11-13 | 2017-11-13 | Air flow control valve unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711114662.1A CN107830181B (en) | 2017-11-13 | 2017-11-13 | Air flow control valve unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107830181A CN107830181A (en) | 2018-03-23 |
| CN107830181B true CN107830181B (en) | 2024-04-19 |
Family
ID=61654166
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711114662.1A Active CN107830181B (en) | 2017-11-13 | 2017-11-13 | Air flow control valve unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107830181B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2223994A (en) * | 1938-03-12 | 1940-12-03 | Pump Engineering Service Corp | Check valve |
| US5295506A (en) * | 1992-12-14 | 1994-03-22 | Smith Allan L | Flow control apparatus |
| CN2451848Y (en) * | 2000-11-17 | 2001-10-03 | 贵州省桐梓县振业汽车配件制造有限公司 | Combined valve block one-way valve |
| CN2859140Y (en) * | 2005-11-24 | 2007-01-17 | 南京沪江复合材料有限公司 | Compound plastic aluminum bag dedicated unidirectional air outlet valve |
| CN206299842U (en) * | 2016-12-06 | 2017-07-04 | 宁波埃美柯铜阀门有限公司 | Vertical Lift Check Valves |
| CN207569214U (en) * | 2017-11-13 | 2018-07-03 | 国网冀北电力有限公司管理培训中心 | Gas flow optimized valve unit |
-
2017
- 2017-11-13 CN CN201711114662.1A patent/CN107830181B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2223994A (en) * | 1938-03-12 | 1940-12-03 | Pump Engineering Service Corp | Check valve |
| US5295506A (en) * | 1992-12-14 | 1994-03-22 | Smith Allan L | Flow control apparatus |
| CN2451848Y (en) * | 2000-11-17 | 2001-10-03 | 贵州省桐梓县振业汽车配件制造有限公司 | Combined valve block one-way valve |
| CN2859140Y (en) * | 2005-11-24 | 2007-01-17 | 南京沪江复合材料有限公司 | Compound plastic aluminum bag dedicated unidirectional air outlet valve |
| CN206299842U (en) * | 2016-12-06 | 2017-07-04 | 宁波埃美柯铜阀门有限公司 | Vertical Lift Check Valves |
| CN207569214U (en) * | 2017-11-13 | 2018-07-03 | 国网冀北电力有限公司管理培训中心 | Gas flow optimized valve unit |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107830181A (en) | 2018-03-23 |
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