CN115234738B - Control device for gas flow - Google Patents
Control device for gas flow Download PDFInfo
- Publication number
- CN115234738B CN115234738B CN202210801200.1A CN202210801200A CN115234738B CN 115234738 B CN115234738 B CN 115234738B CN 202210801200 A CN202210801200 A CN 202210801200A CN 115234738 B CN115234738 B CN 115234738B
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- CN
- China
- Prior art keywords
- sleeve
- gas flow
- control device
- peripheral wall
- coaxially
- 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.)
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Links
- 230000002093 peripheral effect Effects 0.000 claims abstract description 24
- 239000012528 membrane Substances 0.000 claims description 25
- 238000007789 sealing Methods 0.000 claims description 13
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 230000008602 contraction Effects 0.000 claims 2
- 239000007789 gas Substances 0.000 description 31
- 238000000034 method Methods 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
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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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/02—Energy absorbers; Noise absorbers
- F16L55/027—Throttle passages
-
- 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
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/14—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side with fracturing member
- F16K17/16—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side with fracturing member with fracturing diaphragm ; Rupture discs
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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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on, or into, one of the joint parts
- F16L19/02—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member
- F16L19/0212—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member using specially adapted sealing means
- F16L19/0218—Pipe ends provided with collars or flanges, integral with the pipe or not, pressed together by a screwed member using specially adapted sealing means comprising only sealing rings
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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
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L29/00—Joints with fluid cut-off means
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
- Valve Housings (AREA)
Abstract
The invention discloses a control device for gas flow, and belongs to the technical field of gas flow control. The control device includes a body assembly and an adjustment assembly. The body assembly comprises an air inlet connector, a first sleeve, a second sleeve and an air outlet connector, wherein the first end of the first sleeve is coaxially and detachably inserted into the air inlet connector, the second end of the first sleeve is coaxially and detachably inserted into the first end of the second sleeve, the inner peripheral wall of the second sleeve is provided with a first inner flange, and the second end of the second sleeve is coaxially inserted into the air outlet connector. The adjusting component comprises a throat liner and a diaphragm, the throat liner is detachably and coaxially inserted in the first sleeve, the throat liner comprises a shrinking section and an expanding section, and the shrinking section and the expanding section are coaxially communicated. The control device for the gas flow provided by the embodiment of the invention can realize accurate control of the flow by inserting a proper throat liner and can realize accurate control of the rupture pressure by inserting different diaphragms.
Description
Technical Field
The invention belongs to the technical field of gas flow control, and particularly relates to a control device for gas flow.
Background
Currently, in the process of conveying various gases, certain control needs to be performed on the gases, for example, control is performed on the pressure and pressure difference of the gases, and control is performed on the flow rate and flow velocity of the gases.
In the prior art, a throttle valve or a flow regulating valve is generally used for controlling the gas flow, and the control mode mainly comprises a mode of adjusting the throttle area by moving a valve core.
However, in the above manner of adjusting the gas flow through the valve member, the valve core may be moved by long-term gas impact or external force during long-term use, which is very likely to cause a change in the gas flow.
Disclosure of Invention
Aiming at the defects or improvement demands of the prior art, the invention provides a control device for gas flow, which aims to realize accurate control of flow by inserting proper throat liners according to the flow control demands and realize accurate control of rupture pressure by inserting different diaphragms.
The invention provides a control device for gas flow, which comprises a body assembly and a regulating assembly;
The body assembly comprises an air inlet joint, a first sleeve, a second sleeve and an air outlet joint, wherein the first end of the first sleeve is coaxially and detachably inserted in the air inlet joint, the second end of the first sleeve is coaxially and detachably inserted in the first end of the second sleeve, the inner peripheral wall of the second sleeve is provided with a first inner flange, and the second end of the second sleeve is coaxially inserted in the air outlet joint;
The adjusting component comprises a throat liner and a diaphragm, the throat liner is detachably and coaxially inserted into the first sleeve, the throat liner sequentially comprises a shrinking section with the inner diameter gradually reduced and an expanding section with the inner diameter gradually increased, the shrinking section is coaxially communicated with the expanding section, and the diaphragm is clamped between the first sleeve and the first inner flange.
Optionally, the body assembly further includes a press screw slidably sleeved on an outer circumferential wall of the second sleeve, the outer circumferential wall of the press screw is in threaded engagement with an inner circumferential wall of the air outlet connector, the inner circumferential wall of the air outlet connector has a second inner flange, a second end of the second sleeve is coaxially slidably inserted in the second inner flange, an outer circumferential wall of the second sleeve has a first outer flange, and the first outer flange is clamped between the press screw and the second inner flange.
Optionally, a first sealing ring is sandwiched between the second end peripheral wall of the second sleeve and the second inner flange.
Optionally, a side of the membrane facing the first sleeve is provided with a membrane breaking groove.
Optionally, the membrane breaking groove is cross-shaped, Y-shaped or C-shaped.
Optionally, the outer peripheral wall of the first sleeve is provided with a second outer flange, the first end of the first sleeve is provided with an external thread, the air inlet joint is internally provided with an internal thread, the internal thread is matched with the external thread, and the second outer flange is abutted against the end face of the air inlet joint.
Optionally, the inner peripheral wall of the air inlet joint has a third inner flange, and the third inner flange abuts against an end face of the first end of the first sleeve.
Optionally, a second sealing ring is clamped between the second outer flange and the end face of the air inlet joint.
Optionally, a third sealing ring is sandwiched between the diaphragm and the first sleeve and the first inner flange respectively.
Optionally, the shrinkage ratio of the shrinking section is 1.5-4, and the expansion ratio of the expanding section is 2.5-7.
The technical scheme provided by the embodiment of the invention has the beneficial effects that:
When the control device for the gas flow is used for controlling the gas flow, firstly, the left end of the air inlet joint is communicated with the air inlet pipeline, and the left end of the first sleeve is inserted into the right end of the air inlet joint. Then, according to the flow control requirement, selecting the throat lining of the proper shrinking section and the expansion section, inserting the throat lining into the first sleeve, and according to the corresponding shrinking section and expansion section, realizing the accurate control of the flow. Then, arrange suitable diaphragm at first sheathed tube right-hand member terminal surface to through the cover of establishing the second sleeve pipe at first sheathed tube right-hand member, make first inward flange clamp set up the diaphragm, the diaphragm is broken under the gas pressure reaches certain circumstances, thereby realizes the accurate control to the rupture of membranes pressure of gas, in order to adapt to different operating modes, guarantees that gas flows at a high speed. Finally, the right end of the second sleeve is inserted into the air outlet joint, and the air outlet joint is communicated with the air outlet pipe, so that the control of the flow and the pressure of the air can be realized.
That is, the control device for gas flow provided by the embodiment of the invention not only can realize accurate control of flow by inserting proper throat liners according to the flow control requirement, but also can realize accurate control of rupture pressure by inserting different diaphragms (materials or thicknesses), so that the control of flow by using structures such as valve cores is avoided, and the consistency of gas flow in the use process is maintained.
Drawings
FIG. 1 is a cross-sectional view of a control device for gas flow provided in an embodiment of the present invention;
FIG. 2 is a schematic structural view of a first membrane according to an embodiment of the present invention;
FIG. 3 is a schematic structural diagram of a second membrane according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a third membrane according to an embodiment of the present invention;
FIG. 5 is a schematic view of a first laryngeal mask in accordance with an embodiment of the present invention;
fig. 6 is a schematic structural view of a second laryngeal mask in accordance with an embodiment of the present invention.
The symbols in the drawings are as follows:
1. A body assembly; 11. an air inlet joint; 111. a third inner flange; 12. a first sleeve; 121. a second outer flange; 122. abutting the inner flange; 13. a second sleeve; 131. a first inner flange; 132. a first outer flange; 14. an air outlet joint; 141. a second inner flange; 2. an adjustment assembly; 21. a laryngeal liner; 211. shrinking the segment; 212. an expansion section; 22. a membrane; 221. a membrane rupture groove; 23. pressing and screwing; 3. a first seal ring; 4. a second seal ring; 5. and a third sealing ring.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention. In addition, the technical features of the embodiments of the present invention described below may be combined with each other as long as they do not collide with each other.
Fig. 1 is a cross-sectional view of a control device for gas flow according to an embodiment of the present invention, and as shown in fig. 1, the control device includes a body assembly 1 and an adjustment assembly 2.
The body assembly 1 comprises an air inlet joint 11, a first sleeve 12, a second sleeve 13 and an air outlet joint 14, wherein a first end of the first sleeve 12 is coaxially and detachably inserted in the air inlet joint 11, a second end of the first sleeve 12 is coaxially and detachably inserted in a first end of the second sleeve 13, an inner peripheral wall of the second sleeve 13 is provided with a first inner flange 131, and a second end of the second sleeve 13 is coaxially inserted in the air outlet joint 14.
The adjusting assembly 2 comprises a throat insert 21 and a diaphragm 22, the throat insert 21 is detachably and coaxially inserted in the first sleeve 12, the throat insert 21 comprises a reduced section 211 with gradually decreasing inner diameter and an expanded section 212 with gradually increasing inner diameter in sequence, the reduced section 211 and the expanded section 212 are coaxially communicated, and the diaphragm 22 is clamped between the first sleeve 12 and the first inner flange 131.
In the control device for gas flow provided in the embodiment of the present invention, when the flow of gas is controlled, first, the left end of the air inlet joint 11 is communicated with the air inlet pipe, and the left end of the first sleeve 12 is inserted into the right end of the air inlet joint 11. Then, according to the flow control requirement, the throat liner 21 of the proper reduction section 211 and the expansion section 212 is selected, and the throat liner 21 is inserted into the first sleeve 12, and according to the corresponding reduction section 211 and expansion section 212, the accurate control of the flow can be realized. Then, a proper membrane 22 is arranged on the right end face of the first sleeve 12, and the membrane 22 is clamped by the first inner flange 131 through sleeving the second sleeve 13 on the right end of the first sleeve 12, and the membrane 22 is crushed under the condition that the gas pressure reaches a certain value, so that the accurate control of the gas rupture pressure is realized, different working conditions are adapted, and the gas is ensured to flow at a high speed. Finally, the right end of the second sleeve 13 is inserted into the air outlet joint 14, and the air outlet joint 14 is communicated with the air outlet pipe, so that the control of the flow and the pressure of the air can be realized.
That is, the control device for gas flow provided by the embodiment of the invention not only can realize accurate control of flow by inserting the proper throat liner 21 according to the flow control requirement, but also can realize accurate control of rupture pressure by inserting different diaphragms 22 (materials or thicknesses), so that the control of flow by using structures such as valve cores is avoided, and the consistency of gas flow in the use process is maintained.
It is easy to understand that when the flow rate of the gas and the rupture pressure need to be regulated, the throat liner 21 and the diaphragm 22 of different types can be replaced.
With continued reference to fig. 1, the body assembly 1 further includes a press screw 23 slidably sleeved on the outer peripheral wall of the second sleeve 13, the outer peripheral wall of the press screw 23 being in threaded engagement with the inner peripheral wall of the outlet fitting 14, the inner peripheral wall of the outlet fitting 14 having a second inner flange 141, the second end of the second sleeve 13 being coaxially slidably inserted in the second inner flange 141, the outer peripheral wall of the second sleeve 13 having a first outer flange 132, the first outer flange 132 being sandwiched between the press screw 23 and the second inner flange 141.
In the above embodiment, the first outer flange 132 may be sandwiched between the press screw 23 and the second inner flange 141 by the screw-threaded engagement of the press screw 23 and the air outlet fitting 14, thereby achieving stable fitting between the second sleeve 13 and the air outlet fitting 14.
Illustratively, the first seal ring 3 is interposed between the second end peripheral wall of the second sleeve 13 and the second inner flange 141, thereby increasing the sealing performance therebetween.
In the present embodiment, the outer peripheral wall of the first sleeve 12 has the second outer flange 121, the first end of the first sleeve 12 has the external thread, the intake joint 11 has the internal thread, the internal thread and the external thread are engaged, and the second outer flange 121 abuts against the end face of the intake joint 11.
In the above embodiment, the connection strength of the first sleeve 12 and the intake joint 11 in the axial direction can be ensured by the engagement of the internal screw thread and the external screw thread, and the abutment of the second external flange 121 with the end surface of the intake joint 11.
Illustratively, the inner peripheral wall of the air intake joint 11 has a third inner flange 111, and the third inner flange 111 abuts against an end face of the first end of the first sleeve 12, so that the connection strength of the first sleeve 12 and the air intake joint 11 in the axial direction can be further increased by the abutment action of the third inner flange 111.
The second sealing ring 4 is illustratively sandwiched between the second outer flange 121 and the end face of the air intake joint 11. Similarly, a third sealing ring 5 is sandwiched between the diaphragm 22 and the first sleeve 12 and the first inner flange 131, respectively.
Fig. 2 is a schematic structural diagram of a first membrane provided in an embodiment of the present invention, and as shown in fig. 2, a side surface of the membrane 22 facing the first sleeve 12 has a membrane breaking groove 221.
In the above embodiment, the membrane 22 of the membrane breaking groove 221 with different shapes is inserted, so that the membrane breaking pressure and working condition with different requirements can be satisfied.
Illustratively, the rupture disc groove 221 may be cross-shaped, Y-shaped (see FIG. 3), or C-shaped (see FIG. 4). The rupture of membranes groove 221 of different shapes adapts to different rupture of membranes pressure and operating mode, wherein cross is applicable to high pressure low flow operating mode, and the Y font is applicable to high pressure high flow operating mode, and the C font is applicable to low pressure high flow operating mode.
In this embodiment, the shrinkage ratio of the reduced section 211 is 1.5-4 and the expansion ratio of the expanded section 212 is 2.5-7.
Fig. 5 is a schematic structural view of a first laryngeal mask provided by the embodiment of the present invention, and fig. 6 is a schematic structural view of a second laryngeal mask provided by the embodiment of the present invention, and by combining the geometric design with the schematic structural view shown in fig. 5 and fig. 6, the air is controlled to reach the sound velocity at the throat, so as to realize accurate flow control, and adapt to different air flow requirements.
Illustratively, the divergence angle of the diverging section 212 may be 60 °. The inner peripheral wall of the right end of the first sleeve 12 has an abutment inner flange 122 (see fig. 1), the abutment inner flange 122 has a stopper function for the throat insert 21, and the expansion angle of the abutment inner flange 122 coincides with the expansion angle of the expansion section 212, both being 60 °.
In addition, a chamfer is provided between the second sleeve 13 and the first inner flange 131, and the chamfer has a 90 ° divergence angle.
Compared with the prior art, the invention has the beneficial effects that:
(1) The interchangeability is good, and different gas flow rates can be controlled by different throat liner 21 designs of the shrinking section 211 and the expanding section 212. The membrane 22 with grooves in different shapes can meet different requirements of membrane rupture pressure and working conditions through the same installation size.
(2) The sealing performance is good, and through the use of a plurality of sealing rings, the sealing efficiency can be ensured under the working condition that the instantaneous pressure reaches 80 MPa.
(3) Simple structure, dismouting are convenient, and the assembly department uses threaded connection, and the dismouting is very convenient.
(4) The safety is high, man-machine isolation can be realized in the use process, and the personnel safety is ensured.
It will be readily appreciated by those skilled in the art that the foregoing description is merely a preferred embodiment of the invention and is not intended to limit the invention, but any modifications, equivalents, improvements or alternatives falling within the spirit and principles of the invention are intended to be included within the scope of the invention.
Claims (7)
1. A control device for gas flow, characterized in that it comprises a body assembly (1) and a regulating assembly (2);
The body assembly (1) comprises an air inlet joint (11), a first sleeve (12), a second sleeve (13) and an air outlet joint (14), wherein a first end of the first sleeve (12) is coaxially and detachably inserted in the air inlet joint (11), a second end of the first sleeve (12) is coaxially and detachably inserted in a first end of the second sleeve (13), the inner peripheral wall of the second sleeve (13) is provided with a first inner flange (131), and a second end of the second sleeve (13) is coaxially inserted in the air outlet joint (14);
the adjusting assembly (2) comprises a throat liner (21) and a diaphragm (22), the throat liner (21) is detachably and coaxially inserted in the first sleeve (12), the throat liner (21) sequentially comprises a shrinking section (211) with gradually reduced inner diameter and an expanding section (212) with gradually increased inner diameter, the shrinking section (211) and the expanding section (212) are coaxially communicated, and the diaphragm (22) is clamped between the first sleeve (12) and the first inner flange (131);
The body assembly (1) further comprises a press screw (23), the press screw (23) is slidably sleeved on the outer peripheral wall of the second sleeve (13), the outer peripheral wall of the press screw (23) is in threaded fit with the inner peripheral wall of the air outlet joint (14), the inner peripheral wall of the air outlet joint (14) is provided with a second inner flange (141), the second end of the second sleeve (13) is coaxially and slidably inserted in the second inner flange (141), the outer peripheral wall of the second sleeve (13) is provided with a first outer flange (132), and the first outer flange (132) is clamped between the press screw (23) and the second inner flange (141);
a first sealing ring (3) is clamped between the second end peripheral wall of the second sleeve (13) and the second inner flange (141);
a side surface of the membrane (22) facing the first sleeve (12) is provided with a membrane breaking groove (221).
2. A control device for gas flow according to claim 1, characterized in that the membrane-breaking groove (221) is cross-shaped, Y-shaped or C-shaped.
3. A control device for gas flow according to claim 1, characterized in that the peripheral wall of the first sleeve (12) has a second outer flange (121), the first end of the first sleeve (12) has an external thread, the inlet fitting (11) has an internal thread, the internal thread and the external thread cooperate, and the second outer flange (121) abuts against an end face of the inlet fitting (11).
4. A control device for gas flow according to claim 3, characterized in that the inner peripheral wall of the inlet fitting (11) has a third inner flange (111), which third inner flange (111) abuts against an end face of the first end of the first sleeve (12).
5. A control device for gas flow according to claim 3, characterized in that a second sealing ring (4) is sandwiched between the second outer flange (121) and the end face of the inlet fitting (11).
6. A control device for gas flow according to any of claims 1-5, characterized in that a third sealing ring (5) is sandwiched between the membrane (22) and the first sleeve (12), the first inner flange (131), respectively.
7. A control device for gas flow according to any of claims 1-5, characterized in that the contraction ratio of the contraction section (211) is 1.5-4 and the expansion ratio of the expansion section (212) is 2.5-7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210801200.1A CN115234738B (en) | 2022-07-08 | 2022-07-08 | Control device for gas flow |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210801200.1A CN115234738B (en) | 2022-07-08 | 2022-07-08 | Control device for gas flow |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115234738A CN115234738A (en) | 2022-10-25 |
| CN115234738B true CN115234738B (en) | 2024-08-06 |
Family
ID=83671726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210801200.1A Active CN115234738B (en) | 2022-07-08 | 2022-07-08 | Control device for gas flow |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115234738B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101315235A (en) * | 2008-07-17 | 2008-12-03 | 上海交通大学 | Carbon dioxide refrigeration system throttle valve with replaceable spool |
| CN108760222A (en) * | 2018-06-08 | 2018-11-06 | 中国人民解放军国防科技大学 | Silent wind tunnel nozzle with adjustable suction flow |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6957799B2 (en) * | 2003-03-25 | 2005-10-25 | Amtrol, Inc. | Valve for a non-refillable pressurized container |
| CN210424098U (en) * | 2019-05-14 | 2020-04-28 | 玉环市国达阀门有限公司 | Combined air pipe joint |
| CN112901833B (en) * | 2021-01-18 | 2023-01-17 | 湖北三江航天红峰控制有限公司 | Valve gate |
-
2022
- 2022-07-08 CN CN202210801200.1A patent/CN115234738B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101315235A (en) * | 2008-07-17 | 2008-12-03 | 上海交通大学 | Carbon dioxide refrigeration system throttle valve with replaceable spool |
| CN108760222A (en) * | 2018-06-08 | 2018-11-06 | 中国人民解放军国防科技大学 | Silent wind tunnel nozzle with adjustable suction flow |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115234738A (en) | 2022-10-25 |
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