CN212718002U - Ultrahigh pressure pneumatic normally closed needle valve - Google Patents
Ultrahigh pressure pneumatic normally closed needle valve Download PDFInfo
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- CN212718002U CN212718002U CN202021342200.2U CN202021342200U CN212718002U CN 212718002 U CN212718002 U CN 212718002U CN 202021342200 U CN202021342200 U CN 202021342200U CN 212718002 U CN212718002 U CN 212718002U
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Abstract
The utility model discloses an ultrahigh pressure pneumatic normally closed needle valve, wherein a cylinder comprises a cylinder body, a cylinder cover, a spring and a piston rod, one end of the valve rod is connected with a valve seat, and the other end of the valve rod is connected with the piston rod; a piston I, an isolating plug and a piston II are sequentially arranged in the cylinder body, and a piston rod is sequentially connected with the piston II, the isolating plug and the piston I, extends out of the cylinder body and is connected with the end part of the valve rod; the spring is accommodated in the cylinder cover, one end of the spring is connected with the inner end wall of the cylinder cover, and the other end of the spring is connected with the piston II; the outer edge of the isolating plug is limited by a step surface on the inner wall of the cylinder body; the cylinder body is provided with a driving gas inlet; the piston rod is provided with a through hole for communicating a cavity between the cylinder body and the piston I and a cavity between the isolating plug and the piston II. The utility model discloses a design of the cylinder of many strokes, utilize the structural style that the single piston was replaced to the multi-disc piston, when guaranteeing to overcome the spring force, reduced the volume of cylinder, reduced cost and installation space's requirement.
Description
Technical Field
The utility model relates to the technical field of valves, concretely relates to pneumatic normal close needle valve of superhigh pressure.
Background
With the rapid development of the fields of superhard material manufacturing, chemical industry, petrochemical industry, processing technology, isostatic pressing, ultrahigh static pressure extrusion and the like, pipelines with the use pressure of more than 100MPa are increasingly increased, valves used on the pipelines and devices also require the use pressure of more than 100MPa, and the use of a common needle valve cannot meet the requirement, so that the ultrahigh pressure needle valve is required to be adopted, and the main application fields comprise: industry, food industry, atomic energy, tool manufacturing, graphite industry, isostatic pressing technology, and ultra-high pressure water jet technology.
For a normally closed pneumatic valve, a cylinder for driving the valve usually adopts a single-piston structural form; in view of the fact that the spring force for closing the large-diameter valve is often large, and the air pressure provided by the compressed air in the factory is limited, a cylinder with a large diameter is often needed to overcome the spring force, so that the valve is opened, and the size of the cylinder is large.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: traditional pneumatic normally closed needle valve of superhigh pressure adopts the structural style of single piston, and is bulky, and is higher to installation and usage space requirement, the utility model provides a solve the pneumatic normally closed needle valve of superhigh pressure of above-mentioned problem.
The utility model discloses a following technical scheme realizes:
the ultrahigh-pressure pneumatic normally-closed needle valve comprises a valve body, a valve rod assembly and an air cylinder, wherein the valve body comprises a valve seat, the valve rod assembly comprises a valve rod, and the air cylinder comprises a cylinder body, a cylinder cover, a spring and a piston rod; one end of the valve rod is matched with the valve seat, the other end of the valve rod is connected with the piston rod, a piston I, an isolation plug and a piston II are sequentially arranged in the cylinder body, and the piston rod is sequentially connected with the piston II, the isolation plug and the piston I, extends out of the cylinder body and is connected with the end part of the valve rod; the spring is accommodated in the cylinder cover, one end of the spring is connected with the inner end wall of the cylinder cover, and the other end of the spring is connected with the piston II; the outer edge of the isolating plug is limited by a step surface on the inner wall of the cylinder body, and the step surface limits the isolating plug to move along the piston rod in the direction away from the spring; the cylinder body is provided with a driving gas inlet; the piston rod is provided with a through hole for communicating a cavity between the cylinder body and the piston I and a cavity between the isolating plug and the piston II; the driving air pressure enters the space between the cylinder body and the piston I and the cavity between the isolating plug and the piston II in sequence from the driving air inlet to push the piston I and the piston II to move.
For a normally closed pneumatic valve, a cylinder for driving the valve usually adopts a single-piston structural form; in view of the fact that the spring force for closing the large-diameter valve is often large, and the air pressure provided by the compressed air in the factory is limited, a cylinder with a large diameter is often needed to overcome the spring force, so that the valve is opened, and the size of the cylinder is large. Based on the technical background, the utility model adopts the design of a multi-stroke cylinder, and utilizes a structural form that a plurality of pistons replace a single piston, thereby reducing the volume of the cylinder and reducing the requirements of cost and installation space while ensuring that the spring force is overcome; in the process of valve opening and closing, the driving air pressure is utilized to buffer the process, huge impact force between sealing pairs when the valve is closed and impact force to the air cylinder when the valve is opened are avoided, and the service lives and good operation experience of the sealing pairs and the spring are ensured.
Preferably, the cylinder cover is further provided with an exhaust hole I, and the exhaust hole I is used for communicating a cavity between the cylinder cover and the piston II with an external atmospheric environment; and the cylinder body is provided with an exhaust hole II, and the exhaust hole II is used for communicating a cavity between the isolating plug and the piston II with an external atmospheric environment.
When the parts move, the volume change of the non-driving air pressure entering the spaces can occur, if the parts are not communicated with the atmosphere, the air pressure in the spaces can be increased, and therefore partial air pressure driving force is offset, and the exhaust holes are formed for solving the problem.
Preferably, one end of the valve rod, which is far away from the valve body, is sleeved with a connecting piece, the axial section of the connecting piece is of a hollow T-shaped structure, and the inner wall of the connecting piece is in threaded connection with the valve rod; the connecting nut is also included, a threaded hole of the connecting nut comprises a small hole section and a large hole section, and the inner diameter of the large hole section is larger than that of the small hole section; the small hole section of the connecting nut is sleeved outside the vertical rod section of the T-shaped structure of the connecting piece, the large hole section of the connecting nut is sleeved outside the transverse rod section of the T-shaped structure of the connecting piece, and the free end of the large hole section is in threaded connection with the free end of the piston rod.
Preferably, the free end face of the piston rod is provided with a limiting hole, and the T-shaped structure cross rod section of the connecting piece is embedded into the limiting hole to be abutted and contacted.
Further preferably, the free end of the piston rod is further provided with a locking nut I, and the locking nut I is used for locking and fixing the connecting nut.
Further preferably, the valve further comprises a connecting support, and the connecting support is used for connecting the valve body and the air cylinder; the connecting bracket is of a totally-enclosed hollow structure, one end of the connecting bracket is connected with the valve body, and the other end of the connecting bracket is connected with the air cylinder; and the connecting part of the valve rod and the piston rod is positioned in the connecting bracket.
Preferably, the valve body further comprises a cavity, a through hole and a threaded hole, wherein the axes of the cavity, the through hole and the threaded hole are coincident, and the other end of the valve rod penetrates through the connecting support, then penetrates through the threaded hole, the through hole and the cavity in sequence and then is matched with the valve seat; the inner wall of the through hole is used as an outer leakage sealing surface, and the outer wall of the valve rod and the outer leakage sealing surface are provided with a valve rod packing end I, a valve rod packing and a valve rod packing pad II which are tightly pressed and fixed through a valve rod packing nut; and a filler leakage detection hole is also formed in the position, corresponding to the through hole, of the valve body.
Preferably, the valve body is also provided with two joints which are respectively used for connecting the inlet pipeline and the outlet pipeline; the joint for connecting the inlet pipeline is also provided with a joint leakage picking hole.
The utility model discloses it has the leak hunting hole to open on the valve body, is convenient for in time, accurately, sensitively monitor the damaged condition of valve, avoids personnel's injury and product loss because of the valve inefficacy brings, and especially the medium is poisonous and harmful, corrosivity, inflammable and explosive's occasion.
Further preferably, the valve body is a cold-drawn bar valve body.
Traditional needle valve adopts the valve body of ordinary material basically, to super high pressure needle valve, adopts this kind of valve body can make the valve seem unusually bulky, and the result that leads to is as follows: 1) the cost is high: mainly embodied in the aspects of materials, processing, equipment configuration and transportation. 2) The space requirement is high: the valve requires a large space in the pipe system, which is not favorable for the occasions with space limitation. 3) The deformation of the sealing surface is large: the forged valve body is softer, and the hard sealing deformation is larger. The ultrahigh pressure needle valve needs the valve body to have enough strength based on the requirement of ultrahigh pressure, and the traditional needle valve adopts forges the blank, in view of blank strength problem, the valve body need be done very big, leads to the requirement of cost and installation space than higher.
The utility model adopts the cold-drawn bar valve body, and has the characteristics of small product volume and low cost compared with the traditional valve body with the same pressure specification and caliber; and the high-strength valve rod is matched, so that the strength of the valve rod is improved and the service life of the valve is prolonged under the condition that the size of the valve rod is not changed.
The utility model discloses have following advantage and beneficial effect:
1. the utility model adopts the design of a multi-stroke cylinder, and utilizes a structural form that a plurality of pistons replace a single piston, thereby reducing the volume of the cylinder and reducing the requirements on cost and installation space while ensuring that the spring force is overcome; in the process of opening and closing the valve, the driving air pressure is utilized to buffer the process, so that huge impact force between the sealing pairs when the valve is closed and impact force on the air cylinder when the valve is opened are avoided, and the service lives and good operation experience of the sealing pairs and the spring are ensured;
2. the utility model discloses it has the leak hunting hole to open on the valve body, is convenient for in time, accurately, sensitively monitor the damaged condition of valve, avoids personnel's injury and product loss because of the valve inefficacy brings, and especially the medium is poisonous and harmful, corrosivity, inflammable and explosive's occasion.
3. The utility model discloses improved the connection structure of valve rod and piston rod, the stability in use improves.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is an appearance diagram of the ultrahigh pressure pneumatic normally closed needle valve of the present invention;
FIG. 2 is a schematic view of the internal structure of the ultrahigh pressure pneumatic normally closed needle valve of the present invention;
FIG. 3 is a schematic view of the valve body structure of the present invention;
FIG. 4 is a schematic view of the valve stem assembly connecting bracket of the present invention;
FIG. 5 is a schematic view of the connecting bracket of the present invention;
FIG. 6 is a schematic view of the cylinder structure of the present invention;
FIG. 7 is a piston force model; f1Spring force is shown, and D is the diameter of the piston;
FIG. 8 is a model of the valve piston force; f1Indicating the spring force; f2Indicating the upward force of the driving air pressure on the piston I, F3Indicating the upward force of the driving air pressure on the piston II, F4Showing the force of the driving air pressure acting downwardly on the isolating plug, F5The supporting force of the cylinder step facing the isolating plug is shown; the resultant force F ═ F upward for the piston combination2+F3+F5-F4Wherein F is4＝F5And (4) showing.
Reference numbers and corresponding part names in the drawings:
1-valve body, 11-compression nut, 12-chuck, 13-joint outer leakage detection hole, 14-valve seat, 15-cavity, 16-outer leakage sealing surface, 17-packing outer leakage detection hole;
2-valve rod assembly, 21-valve rod, 22-valve rod packing cushion I, 23-valve rod packing, 24-valve rod packing cushion II, 25-guide sleeve, 26-valve rod packing nut, 27-nut, 28-indicating sheet and 29-connecting piece;
3-connecting a support, 31-connecting a valve body and 32-connecting a cylinder;
4-cylinder, 41-connecting nut, 42-locking nut I, 43-piston rod, 44-cylinder body, 45-O-shaped ring, 46-piston I, 47-isolating plug, 48-piston II, 49-cylinder cover, 410-spring, 411-spring seat, 412-adjusting bolt, 413-locking nut II, 414-exhaust hole I, 415-exhaust hole II, 416-driving gas inlet;
in the drawings, a denotes a fluid inlet, and B denotes a fluid outlet.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
Example 1
The utility model provides a pneumatic normally closed needle valve of superhigh pressure, including valve body 1, valve rod assembly 2 and cylinder 4, valve body 1 includes valve seat 14, valve rod assembly 2 includes valve rod 21, cylinder 4 includes cylinder body 44, cylinder cap 49, spring 410 and piston rod 43; one end of the valve rod 21 is matched with the valve seat 14, the other end of the valve rod is connected with the piston rod 43, a piston I46, an isolating plug 47 and a piston II48 are sequentially arranged in the cylinder body 44, and the piston rod 43 is sequentially connected with the piston II48, the isolating plug 47 and the piston I46, extends out of the cylinder body 44 and then is connected with the end part of the valve rod 21. The spring 410 is accommodated in the cylinder cover 49, one end of the spring 410 is connected with the inner end wall of the cylinder cover 49, and the other end of the spring 410 is connected with the piston II 48; the outer edge of the isolating plug 47 is limited by a step surface on the inner wall of the cylinder 44, and the step surface limits the isolating plug 47 to move along the piston rod 43 in the direction away from the spring 410. The cylinder body 44 is provided with a driving air inlet 416; the piston rod 43 is provided with a through hole for communicating a chamber between the cylinder 44 and the piston I46 with a chamber between the isolating plug 47 and the piston II 48. The driving air pressure enters the space between the cylinder 44 and the piston I46 and the chamber between the isolating plug 47 and the piston II48 in turn from the driving air inlet 416, and pushes the piston I46 and the piston II48 to move.
The embodiment is a normally closed pneumatic mechanism execution valve, and when the cylinder has no driving air pressure, the valve is in a closed state; when driving air pressure is applied to the air cylinder, the piston in the air cylinder overcomes spring force, stretches the valve rod, separates the sealing pair and opens the valve under the action of the air pressure, and the mechanical model is as shown in figure 8:
the cylinder of the embodiment adopts a multi-stroke piston structure, namely the piston area A is divided into A1、A2F2 — drive pressure P ﹡ piston area a; the plurality of pistons are driven by the driving air pressure together and overcome the action of the spring force together, so that the purpose of reducing the diameter D of the piston is achieved, and the purpose of reducing the diameter of the cylinder is further achieved; under the working conditions of large caliber and large pressure, the multi-stroke structure has greater advantage in reducing the volume. In addition, the present embodiment uses a 2-stroke structure, and may use a 3-stroke or even a 4-stroke structure as needed.
As shown in fig. 6, the driving air pressure enters from the driving air inlet 416, enters the space between the cylinder 44 and the piston I46 and the space between the isolating plug 47 and the piston II48, and pushes the piston I46 and the piston II48 to move upwards, so as to open the valve, and the mechanical model of the valve is shown in fig. 8: the isolating plug 47 receives a top-down force which is supported by the step surface of the cylinder 44 without applying a downward force to the entire piston assembly.
When the parts move, the volume change of non-driving air pressure entering the spaces can occur, if the parts are not communicated with the atmosphere, the air pressure in the spaces can be increased, so that partial air pressure driving force is counteracted, and the exhaust hole I414 and the exhaust hole II415 exist for solving the problem;
example 2
In addition, on the basis of embodiment 1, the cylinder cover 49 is further provided with an exhaust hole I14, and the exhaust hole I414 is used for communicating a cavity between the cylinder cover 49 and the piston II48 with the external atmosphere; the cylinder 44 is provided with a vent hole II415, and the vent hole II415 is used for communicating the chamber between the isolating plug 47 and the piston II48 with the external atmosphere.
Example 3
The valve rod 21 is further improved on the basis of the embodiment 2, one end of the valve rod 21, which is far away from the valve body 1, is sleeved with a connecting piece 29, the axial section of the connecting piece 29 is of a hollow T-shaped structure, and the inner wall of the connecting piece 29 is in threaded connection with the valve rod 21. The connecting nut 41 is further included, a threaded hole of the connecting nut 41 comprises a small hole section and a large hole section, and the inner diameter of the large hole section is larger than that of the small hole section; the small hole section of the connecting nut 41 is sleeved outside the vertical rod section of the connecting piece 29T-shaped structure, the large hole section of the connecting nut 41 is sleeved outside the transverse rod section of the connecting piece 29T-shaped structure, and the free end of the large hole section is in threaded connection with the free end of the piston rod 43. The free end face of the piston rod 43 is provided with a limiting hole, and the connecting piece 29T-shaped structure cross rod section is embedded into the limiting hole to be abutted and contacted.
The free end of the piston rod 43 is also provided with a locking nut I42, and the locking nut I42 is used for locking and fixing the connecting nut 41. The valve body is characterized by further comprising a connecting bracket 3, wherein a round hole allowing the valve rod 21 to pass through and a threaded hole for connecting the cylinder body 44 and the valve body 1 are respectively formed in two ends of the connecting bracket. The connecting bracket 3 is used for connecting the valve body 1 and the cylinder 4; the connecting bracket 3 is of a totally-enclosed hollow structure, the appearance of the connecting bracket is of a cuboid structure, one end of the connecting bracket 3 is connected with the valve body 1, and the other end of the connecting bracket is connected with the cylinder 4; and the connection point of the valve rod 21 and the piston rod 43 is located in the connecting bracket 3.
Example 4
The valve body 1 further comprises a cavity 15, a through hole and a threaded hole which are overlapped in axis, and the other end of the valve rod 21 penetrates through the connecting support 3 and then penetrates through the threaded hole, the through hole and the cavity in sequence and then is matched with the valve seat 14; the inner wall of the through hole is used as an outer leakage sealing surface 16, the outer wall of the valve rod 21 and the outer leakage sealing surface 16 are provided with a valve rod packing end I22, a valve rod packing 23 and a valve rod packing pad II24, and are pressed and fixed through a valve rod packing nut 26; and a filler leakage detecting hole 17 is also formed in the position, corresponding to the through hole, of the valve body 1. The valve body 1 is also provided with two joints 12 which are respectively used for connecting an inlet pipeline and an outlet pipeline; a joint 12 for connecting an inlet pipeline is also provided with a joint leakage picking hole 13.
Example 5
The valve body 1 is further improved on the basis of the embodiment 4, and a cold-drawn bar valve body is adopted.
The above embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above embodiments are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (9)
1. The ultrahigh-pressure pneumatic normally-closed needle valve comprises a valve body (1), a valve rod assembly (2) and a cylinder (4), wherein the valve body (1) comprises a valve seat (14), the valve rod assembly (2) comprises a valve rod (21), and the cylinder (4) comprises a cylinder body (44), a cylinder cover (49), a spring (410) and a piston rod (43); one end of the valve rod (21) is matched with the valve seat (14), and the other end of the valve rod is connected with the piston rod (43), the valve seat is characterized in that a piston I (46), an isolation plug (47) and a piston II (48) are sequentially arranged in the cylinder body (44), and the piston rod (43) is sequentially connected with the piston II (48), the isolation plug (47) and the piston I (46) and extends out of the cylinder body (44) to be connected with the end part of the valve rod (21);
the spring (410) is accommodated in the cylinder cover (49), one end of the spring (410) is connected with the inner end wall of the cylinder cover (49), and the other end of the spring (410) is connected with the piston II (48); the outer edge of the isolating plug (47) is limited by a step surface on the inner wall of the cylinder body (44), and the step surface limits the isolating plug (47) to move towards the direction far away from the spring (410) along the piston rod (43);
a driving air inlet (416) is formed in the cylinder body (44); the piston rod (43) is provided with a through hole for communicating a cavity between the cylinder body (44) and the piston I (46) with a cavity between the isolating plug (47) and the piston II (48);
the driving air pressure enters the space between the cylinder body (44) and the piston I (46) and the cavity between the isolating plug (47) and the piston II (48) in sequence from the driving air inlet (416), and the piston I (46) and the piston II (48) are pushed to move.
2. The ultrahigh-pressure pneumatic normally closed needle valve is characterized in that an exhaust hole I (414) is formed in the cylinder cover (49), and the exhaust hole I (414) is used for communicating a chamber between the cylinder cover (49) and the piston II (48) with an external atmosphere environment; and the cylinder body (44) is provided with an exhaust hole II (415), and the exhaust hole II (415) is used for communicating a cavity between the isolating plug (47) and the piston II (48) with an external atmospheric environment.
3. The ultrahigh-pressure pneumatic normally closed needle valve as claimed in claim 1, wherein one end of the valve rod (21) far away from the valve body (1) is sleeved with a connecting piece (29), the axial section of the connecting piece (29) is of a hollow T-shaped structure, and the inner wall of the connecting piece (29) is in threaded connection with the valve rod (21);
the connecting nut (41) is further included, a threaded hole of the connecting nut (41) comprises a small hole section and a large hole section, and the inner diameter of the large hole section is larger than that of the small hole section; the small hole section of the connecting nut (41) is sleeved outside the vertical rod section of the T-shaped structure of the connecting piece (29), the large hole section of the connecting nut (41) is sleeved outside the transverse rod section of the T-shaped structure of the connecting piece (29), and the free end of the large hole section is in threaded connection with the free end of the piston rod (43).
4. The ultrahigh-pressure pneumatic normally closed needle valve as claimed in claim 3, wherein a limiting hole is formed in the end face of the free end of the piston rod (43), and the T-shaped structure cross rod section of the connecting piece (29) is embedded into the limiting hole to be abutted against each other.
5. The ultrahigh-pressure pneumatic normally closed needle valve as claimed in claim 3, wherein the free end of the piston rod (43) is further provided with a locking nut I (42), and the locking nut I (42) is used for locking and fixing the connecting nut (41).
6. An ultrahigh-pressure pneumatic normally closed needle valve according to any one of claims 3 to 5, characterized by further comprising a connecting bracket (3), wherein the connecting bracket (3) is used for connecting the valve body (1) and the cylinder (4); the connecting support (3) is of a fully-closed hollow structure, one end of the connecting support (3) is connected with the valve body (1), and the other end of the connecting support is connected with the cylinder (4); and the connecting part of the valve rod (21) and the piston rod (43) is positioned in the connecting bracket (3).
7. The ultrahigh-pressure pneumatic normally closed needle valve is characterized in that the valve body (1) further comprises a cavity (15), a through hole and a threaded hole, wherein the axes of the cavity, the through hole and the threaded hole are coincident, and the other end of the valve rod (21) penetrates through the connecting support (3) and then penetrates through the threaded hole, the through hole and the cavity in sequence and then is matched with the valve seat (14); the inner wall of the through hole is used as an outer leakage sealing surface (16), the outer wall of the valve rod (21) and the outer leakage sealing surface (16) are provided with a valve rod packing end I (22), a valve rod packing (23) and a valve rod packing pad II (24), and the valve rod packing end I, the valve rod packing pad II and the valve rod packing pad II are tightly pressed and fixed through a valve rod packing nut (26); and a filler leakage detection hole (17) is also formed in the position, corresponding to the through hole, of the valve body (1).
8. An ultrahigh-pressure pneumatic normally closed needle valve according to claim 1, wherein the valve body (1) is further provided with two connectors (12) for connecting an inlet pipeline and an outlet pipeline respectively; a joint (12) for connecting the inlet pipeline is also provided with a joint leakage picking hole (13).
9. An ultrahigh-pressure pneumatic normally closed needle valve according to claim 1, characterized in that the valve body (1) is a cold-drawn bar valve body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021342200.2U CN212718002U (en) | 2020-07-09 | 2020-07-09 | Ultrahigh pressure pneumatic normally closed needle valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021342200.2U CN212718002U (en) | 2020-07-09 | 2020-07-09 | Ultrahigh pressure pneumatic normally closed needle valve |
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| CN212718002U true CN212718002U (en) | 2021-03-16 |
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| CN202021342200.2U Active CN212718002U (en) | 2020-07-09 | 2020-07-09 | Ultrahigh pressure pneumatic normally closed needle valve |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117386830A (en) * | 2023-12-13 | 2024-01-12 | 中国空气动力研究与发展中心超高速空气动力研究所 | Quick response pneumatic needle valve suitable for pulse wind tunnel and application method thereof |
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2020
- 2020-07-09 CN CN202021342200.2U patent/CN212718002U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117386830A (en) * | 2023-12-13 | 2024-01-12 | 中国空气动力研究与发展中心超高速空气动力研究所 | Quick response pneumatic needle valve suitable for pulse wind tunnel and application method thereof |
| CN117386830B (en) * | 2023-12-13 | 2024-02-02 | 中国空气动力研究与发展中心超高速空气动力研究所 | Quick response pneumatic needle valve suitable for pulse wind tunnel and application method thereof |
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