CN111927962A - Negative pressure control type air connecting valve - Google Patents
Negative pressure control type air connecting valve Download PDFInfo
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- CN111927962A CN111927962A CN202011030220.0A CN202011030220A CN111927962A CN 111927962 A CN111927962 A CN 111927962A CN 202011030220 A CN202011030220 A CN 202011030220A CN 111927962 A CN111927962 A CN 111927962A
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- pressure control
- control mechanism
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- coil spring
- spring type
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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
- 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
- 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
- F16K1/32—Details
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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
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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
- F16K47/00—Means in valves for absorbing fluid energy
- F16K47/08—Means in valves for absorbing fluid energy for decreasing pressure or noise level and having a throttling member separate from the closure member, e.g. screens, slots, labyrinths
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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
- F16K51/00—Other details not peculiar to particular types of valves or cut-off apparatus
- F16K51/02—Other details not peculiar to particular types of valves or cut-off apparatus specially adapted for high-vacuum installations
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Control Of Fluid Pressure (AREA)
Abstract
The invention discloses a negative pressure control type air connecting valve which comprises a main hollow shell, wherein a connecting plate structure is arranged on the side face of the bottom of the longitudinal structure of the main hollow shell. The invention utilizes the negative pressure action control medium formed between the atmospheric pressure and the extracted air to drive the internal valve rod to move and carry out the barrier control on the through hole for extracting the air, thereby realizing the autonomous negative pressure control, once the negative pressure value exceeds the tension of the spiral spring type pressure control mechanism, the internal part of the spiral spring type pressure control mechanism moves to block the ventilation part, thereby preventing the further pressure reduction phenomenon, and the device utilizes the formation of the air vortex at the junction when the air enters the wide space from the narrow space, the air flow speed can be reduced, thereby controlling the maximum moving speed of the main piston plate, thereby leading the negative pressure control to be carried out under the slow condition and improving the control precision.
Description
Technical Field
The invention relates to the technical field of air connecting valves, in particular to a negative pressure control type air connecting valve.
Background
At present, when a space is vacuumized, a component absorbed by the vacuum or equipment with a requirement on the degree of negative pressure is easily damaged due to the overlarge negative pressure value.
Disclosure of Invention
The present invention is directed to a negative pressure controlled air connection valve, which solves the above problems.
In order to achieve the purpose, the invention provides the following technical scheme: a negative pressure control type air connecting valve comprises a main hollow shell, wherein a connecting plate structure is arranged on the side face of the bottom of a longitudinal structure of the main hollow shell, a longitudinal main first exhaust hole is formed in the interior of the longitudinal structure of the main hollow shell, an air inlet connecting port is formed in the bottom end of the main first exhaust hole, a main second exhaust hole communicated with one side of the main hollow shell is formed in the interior of a transverse structure of the main hollow shell, the main first exhaust hole is communicated with the end portion of the main second exhaust hole through a circular angle at a communicated position, an exhaust connecting port is formed in the end portion of the main second exhaust hole, the middle of the main second exhaust hole is penetrated through by a main part mounting hole, the top end of the main part mounting hole is communicated with an external space, a spiral spring type pressure control mechanism is mounted in the interior of the main part mounting hole, and an air moving space is arranged at the bottom of the, an internally mounted master piston board in air removal space, a main telescopic link is installed at the top end face center of master piston board, the one end of main telescopic link extends to the inside of major component mounting hole, and tip and coil spring formula pressure control mechanism fixed connection, air removal space bottom is equipped with the main air vent with external intercommunication, the inside of main hollow casing is equipped with the air compensation hole that communicates air removal space top one side and main hollow casing one side, the inside of main hollow casing is lieing in the side in air compensation hole is equipped with a plurality of curved surface groove structure.
Further, the coil spring type pressure control mechanism comprises a hollow shell for the coil spring type pressure control mechanism, a hollow structure for the coil spring type pressure control mechanism, a rod body through hole for the coil spring type pressure control mechanism, a first air vent for the coil spring type pressure control mechanism, a second air vent for the coil spring type pressure control mechanism, a high-pressure sealing ring for the coil spring type pressure control mechanism, a moving valve for the coil spring type pressure control mechanism, a third air vent for the coil spring type pressure control mechanism, a rod body mounting groove for the coil spring type pressure control mechanism and a coil spring for the coil spring type pressure control mechanism.
Further, the hollow shell for the helical spring type pressure control mechanism is internally provided with a hollow structure for the helical spring type pressure control mechanism, the bottom end center of the hollow shell for the helical spring type pressure control mechanism is provided with a rod body through hole for the helical spring type pressure control mechanism, the top end center of the hollow shell for the helical spring type pressure control mechanism is provided with a first vent hole for the helical spring type pressure control mechanism, the middle section of the surface of the hollow shell for the helical spring type pressure control mechanism is provided with two opposite second vent holes for the helical spring type pressure control mechanism, two sides of the second vent hole for the helical spring type pressure control mechanism are respectively provided with a high-pressure sealing ring for the helical spring type pressure control mechanism, and the hollow structure for the helical spring type pressure control mechanism is internally provided with a moving valve for the helical spring type pressure control mechanism, the bottom end face center of the coil spring type moving valve for the pressure control mechanism is provided with a rod body mounting groove for the coil spring type pressure control mechanism, the bottom of the coil spring type moving valve for the pressure control mechanism is provided with a coil spring type coil spring in a compressed state for the pressure control mechanism, and a third vent hole for the coil spring type pressure control mechanism penetrating through the transverse side face is formed in the coil spring type moving valve for the pressure control mechanism.
Further, the coil spring type pressure control mechanism is mounted inside the main part mounting hole with a hollow housing.
Further, when the coil spring type pressure control mechanism travel valve moves to the top end of the coil spring type pressure control mechanism hollow structure, the coil spring type pressure control mechanism second vent hole and the coil spring type pressure control mechanism third vent hole are completely communicated.
Further, the rod body through hole for the coil spring type pressure control mechanism is penetrated by the rod body of the main moving rod, and the top end of the main moving rod is installed inside the rod body installation groove for the coil spring type pressure control mechanism.
Furthermore, the two coil spring type pressure control mechanisms are respectively communicated with the two through holes of the main second exhaust hole at the penetrating part through the second vent hole.
Furthermore, the curved surface groove structure is a curved surface structure with the width of the air inlet part larger than that of the air outlet part.
Compared with the prior art, the invention has the beneficial effects that: the invention utilizes the negative pressure action control medium formed between the atmospheric pressure and the extracted air to drive the internal valve rod to move and carry out the barrier control on the through hole for extracting the air, thereby realizing the autonomous negative pressure control, once the negative pressure value exceeds the tension of the spiral spring type pressure control mechanism, the internal part of the spiral spring type pressure control mechanism moves to block the ventilation part, thereby preventing the further pressure reduction phenomenon, and the device utilizes the formation of the air vortex at the junction when the air enters the wide space from the narrow space, the air flow speed can be reduced, thereby controlling the maximum moving speed of the main piston plate, thereby leading the negative pressure control to be carried out under the slow condition and improving the control precision.
Drawings
FIG. 1 is a schematic view of a full-section structure of a negative pressure control type air connection valve according to the present invention;
FIG. 2 is a schematic structural view of a coil spring type pressure control mechanism in a negative pressure control type air connection valve according to the present invention;
in the figure: 1, a main hollow case, 2, a connecting plate structure, 3, a main first exhaust hole, 4, a fillet, 5, a main second exhaust hole, 6, an exhaust connection port, 7, a main vent hole, 8, a main part mounting hole, 9, an intake connection port, 10, an air compensation hole, 11, a curved groove structure, 12, an air movement space, 13, a main piston plate, 14, a main expansion link, 15, a coil spring type pressure control mechanism, 151, a hollow case for a coil spring type pressure control mechanism, 152, a hollow structure for a coil spring type pressure control mechanism, 153, a rod body through hole for a coil spring type pressure control mechanism, 154, a first vent hole for a coil spring type pressure control mechanism, 155, a second vent hole for a coil spring type pressure control mechanism, 156, a high-pressure seal ring for a coil spring type pressure control mechanism, 157, a moving valve for a coil spring type pressure control mechanism, 158, a third vent hole for a coil spring type pressure control mechanism, 159, a rod mounting groove for a coil spring type pressure control mechanism, 1510, and a coil spring for a coil spring type pressure control mechanism.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, an embodiment of the present invention: the air-cooling type air conditioner comprises a main hollow shell 1, wherein a connecting plate structure 2 is arranged on the side face of the bottom of a longitudinal structure of the main hollow shell 1, a longitudinal main first exhaust hole 3 is arranged in the longitudinal structure of the main hollow shell 1, an air inlet connecting port 9 is arranged at the bottom end of the main first exhaust hole 3, a main second exhaust hole 5 communicated with one side of the main hollow shell 1 is arranged in the transverse structure of the main hollow shell 1, the end parts of the main first exhaust hole 3 and the main second exhaust hole 5 are communicated, the main first exhaust hole 3 and the main second exhaust hole 5 are communicated through the end parts of the two main first exhaust holes and the two main second exhaust holes at the communicated parts through a circular bead 4, an exhaust connecting port 6 is arranged at the end part of the main second exhaust hole 5, the middle part of the main second exhaust hole 5 is penetrated through by a main part mounting hole 8, the top end part of the main part mounting hole 8 is communicated, an internally mounted master piston board 13 of air movement space 12, a main telescopic link 14 is installed at the top end face center of master piston board 13, the one end of main telescopic link 14 extends to the inside of main part mounting hole 8, and tip and 15 fixed connection of coil spring formula pressure control mechanism, air movement space 12 bottom is equipped with the main air vent 7 with external intercommunication, the inside of main hollow shell 1 is equipped with the air compensation hole 10 of communicating air movement space 12 top one side and main hollow shell 1 one side, the inside of main hollow shell 1 is lieing in the side in air compensation hole 10 is equipped with a plurality of curved surface groove structure 11.
Referring to fig. 2, the coil spring type pressure control mechanism 15 includes a coil spring type pressure control mechanism hollow housing 151, a coil spring type pressure control mechanism hollow structure 152, a coil spring type pressure control mechanism rod through hole 153, a coil spring type pressure control mechanism first vent hole 154, a coil spring type pressure control mechanism second vent hole 155, a coil spring type pressure control mechanism high-pressure seal ring 156, a coil spring type pressure control mechanism moving valve 157, a coil spring type pressure control mechanism third vent hole 158, a coil spring type pressure control mechanism rod mounting groove 159, and a coil spring type pressure control mechanism coil spring 1510; a coil spring type hollow structure 152 for pressure control mechanism is provided in the center of the inside of the hollow housing 151 for pressure control mechanism, a coil spring type rod through hole 153 for pressure control mechanism is provided in the center of the bottom end of the hollow housing 151 for pressure control mechanism, a first vent 154 for pressure control mechanism is provided in the center of the top end of the hollow housing 151 for pressure control mechanism, two opposing second vent holes 155 for pressure control mechanism are provided in the middle section of the side surface of the hollow housing 151 for pressure control mechanism, a coil spring type high-pressure seal ring 156 for pressure control mechanism is provided on each side of the second vent hole 155 for pressure control mechanism, a coil spring type moving valve 157 for pressure control mechanism is provided in the hollow structure 152 for pressure control mechanism, a coil spring type pressure control mechanism rod body mounting groove 159 is arranged at the center of the bottom end face of the coil spring type pressure control mechanism movable valve 157, a coil spring type pressure control mechanism coil spring 1510 in a compressed state is mounted at the bottom of the coil spring type pressure control mechanism movable valve 157, and a coil spring type pressure control mechanism third vent hole 158 penetrating through the transverse side face is arranged in the coil spring type pressure control mechanism movable valve 157; the hollow shell 151 for the coil spring type pressure control mechanism is installed inside the main part installation hole 8; when the coil spring type pressure control mechanism moving valve 157 moves to the top end of the coil spring type pressure control mechanism hollow structure 152, the coil spring type pressure control mechanism second vent hole 155 and the coil spring type pressure control mechanism third vent hole 158 are completely communicated; the rod body through hole 153 for the coil spring type pressure control mechanism is penetrated by the rod body of the main moving rod 14, and the top end of the main moving rod 14 is installed in the rod body installation groove 159 for the coil spring type pressure control mechanism; the two spiral spring type pressure control mechanisms are respectively connected with two through holes of the main second exhaust hole 5 at the penetrating part through the second vent holes 155; the curved surface groove structure 11 is a curved surface structure with the width of the air inlet part larger than that of the air outlet part.
The specific use mode is as follows: in the invention, a main connecting plate structure 2 is fixedly connected with equipment needing negative pressure adsorption through bolts, an air inlet connecting port 9 and a main vent hole 7 are respectively communicated with an air exhaust hole of the fixed equipment and a negative pressure chamber in the equipment, an air exhaust connecting port 6 is connected with an air inlet end in an air extractor, when the air extractor works, air is continuously exhausted from the inside of the fixed equipment, the pressure of the space inside the main vent hole 7 is also reduced due to continuous exhaust of the air inside the equipment, a main piston plate 13 moves rightwards under the action of a negative pressure space, and the premise that the main piston plate 13 moves rightwards is that the air continuously enters the inside of an air moving space 12 through an air compensation hole 10 to realize air compensation, the main piston plate 13 drives a main moving rod 14 to generate the trend of moving rightwards, when the negative pressure value exceeds the elasticity of a spiral spring type spring 1510 for a spiral pressure control mechanism, further, the coil spring type pressure control mechanism is compressed by the coil spring 1510, and the coil spring type pressure control mechanism moving valve 157 is moved down, so that the air through holes are dislocated, the air stops flowing, and the air is stopped from being drawn outward, thereby realizing a protective measure.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (8)
1. The utility model provides a negative pressure accuse pressure formula air connecting valve, includes main hollow shell (1), its characterized in that: the bottom side of the longitudinal structure of the main hollow shell (1) is provided with a connecting plate structure (2), the inside of the longitudinal structure of the main hollow shell (1) is provided with a longitudinal main first exhaust hole (3), the bottom end of the main first exhaust hole (3) is provided with an air inlet connecting port (9), the inside of the transverse structure of the main hollow shell (1) is provided with a main second exhaust hole (5) communicated with one side of the main hollow shell, the ends of the main first exhaust hole (3) and the main second exhaust hole (5) are communicated, the main first exhaust hole and the main second exhaust hole pass through a fillet (4) at the communicated part, the end of the main second exhaust hole (5) is provided with an exhaust connecting port (6), the middle part of the main second exhaust hole (5) is penetrated through by a main part mounting hole (8), the top end of the main part mounting hole (8) is communicated with the external space, and the inside of the main part mounting hole (8) is provided, the bottom of major component mounting hole (8) is equipped with an air movement space (12), an internally mounted master piston board (13) of air movement space (12), a main telescopic link (14) is installed at the top end face center of master piston board (13), the one end of main telescopic link (14) extends to the inside of major component mounting hole (8), and tip and coil spring formula pressure control mechanism (15) fixed connection, air movement space (12) bottom is equipped with main air vent (7) with external intercommunication, the inside of main hollow casing (1) is equipped with intercommunication air movement space (12) top one side and air compensation hole (10) of main hollow casing (1) one side, the inside of main hollow casing (1) is lieing in the side of air compensation hole (10) is equipped with a plurality of curved surface groove structure (11).
2. The negative pressure controlled pressure air connection valve of claim 1, wherein: the coil spring type pressure control mechanism (15) comprises a coil spring type pressure control mechanism hollow shell (151), a coil spring type pressure control mechanism hollow structure (152), a coil spring type pressure control mechanism rod body through hole (153), a coil spring type pressure control mechanism first vent hole (154), a coil spring type pressure control mechanism second vent hole (155), a coil spring type pressure control mechanism high-pressure sealing ring (156), a coil spring type pressure control mechanism moving valve (157), a coil spring type pressure control mechanism third vent hole (158), a coil spring type pressure control mechanism rod body mounting groove (159) and a coil spring type pressure control mechanism coil spring (1510).
3. A negative pressure controlled air connection valve as claimed in claim 2, wherein: the utility model discloses a helical spring formula for pressure control mechanism is including hollow shell for pressure control mechanism (151), helical spring formula for pressure control mechanism hollow structure (152) are equipped with helical spring formula for pressure control mechanism hollow shell (151) at the inside center, the bottom center of helical spring formula for pressure control mechanism hollow shell (151) is equipped with body of rod through hole (153) for pressure control mechanism, the top center of helical spring formula for pressure control mechanism hollow shell (151) is equipped with helical spring formula for pressure control mechanism first air vent (154), the middle section of helical spring formula for pressure control mechanism hollow shell (151) side is equipped with two opposite helical spring formula for pressure control mechanism second air vent (155), helical spring formula for pressure control mechanism second air vent both sides are installed helical spring formula for pressure control mechanism high-pressure seal circle (156) respectively, helical spring formula for pressure control mechanism hollow structure (152) internally mounted helical spring formula for pressure control mechanism move with moving The valve (157), the bottom end face center of the coil spring type pressure control mechanism movable valve (157) is provided with a coil spring type pressure control mechanism rod body installation groove (159), the bottom of the coil spring type pressure control mechanism movable valve (157) is provided with a coil spring type pressure control mechanism coil spring (1510) in a compressed state, and the interior of the coil spring type pressure control mechanism movable valve (157) is provided with a coil spring type pressure control mechanism third vent hole (158) penetrating through the transverse side face.
4. A negative pressure controlled air connection valve as claimed in claim 3, wherein: the coil spring type pressure control mechanism is mounted inside the main component mounting hole (8) by a hollow housing (151).
5. A negative pressure controlled air connection valve as claimed in claim 3, wherein: when the coil spring type pressure control mechanism travel valve (157) moves to the top end of the coil spring type pressure control mechanism hollow structure (152), the coil spring type pressure control mechanism second vent hole (155) and the coil spring type pressure control mechanism third vent hole (158) are completely communicated.
6. A negative pressure controlled air connection valve as claimed in claim 3, wherein: the rod body through hole (153) for the helical spring type pressure control mechanism is penetrated by a rod body of the main moving rod (14), and the top end of the main moving rod (14) is installed in the rod body installation groove (159) for the helical spring type pressure control mechanism.
7. A negative pressure controlled air connection valve as claimed in claim 3, wherein: the two spiral spring type pressure control mechanisms are respectively communicated with the two through holes of the main second exhaust hole (5) at the penetrating part through the second vent holes (155).
8. The negative pressure controlled pressure air connection valve of claim 1, wherein: the curved surface groove structure (11) is a curved surface structure with the width of the air inlet part larger than that of the air outlet part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011030220.0A CN111927962B (en) | 2020-09-27 | 2020-09-27 | Negative pressure control type air connecting valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011030220.0A CN111927962B (en) | 2020-09-27 | 2020-09-27 | Negative pressure control type air connecting valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111927962A true CN111927962A (en) | 2020-11-13 |
| CN111927962B CN111927962B (en) | 2021-01-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011030220.0A Active CN111927962B (en) | 2020-09-27 | 2020-09-27 | Negative pressure control type air connecting valve |
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| Country | Link |
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| CN (1) | CN111927962B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115949761A (en) * | 2023-02-24 | 2023-04-11 | 江苏恒双自控设备制造有限公司 | Vacuum pneumatic butterfly valve |
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|---|---|---|---|---|
| CN200952588Y (en) * | 2006-07-17 | 2007-09-26 | 中国科学院近代物理研究所 | Mechanical safety valve for secondary vacuum system |
| JP2009085241A (en) * | 2007-09-27 | 2009-04-23 | Anest Iwata Corp | Vacuum valve |
| JP2017151571A (en) * | 2016-02-22 | 2017-08-31 | 尼寺空圧工業株式会社 | Pressure control valve and measurement device |
| CN207349523U (en) * | 2017-10-12 | 2018-05-11 | 四川德力铁道科技有限公司 | A kind of intelligent electromagnetic breather valve |
| CN109707885A (en) * | 2017-02-03 | 2019-05-03 | 中国石油化工股份有限公司 | Trequency piston type constant pressure valve |
-
2020
- 2020-09-27 CN CN202011030220.0A patent/CN111927962B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200952588Y (en) * | 2006-07-17 | 2007-09-26 | 中国科学院近代物理研究所 | Mechanical safety valve for secondary vacuum system |
| JP2009085241A (en) * | 2007-09-27 | 2009-04-23 | Anest Iwata Corp | Vacuum valve |
| JP2017151571A (en) * | 2016-02-22 | 2017-08-31 | 尼寺空圧工業株式会社 | Pressure control valve and measurement device |
| CN109707885A (en) * | 2017-02-03 | 2019-05-03 | 中国石油化工股份有限公司 | Trequency piston type constant pressure valve |
| CN207349523U (en) * | 2017-10-12 | 2018-05-11 | 四川德力铁道科技有限公司 | A kind of intelligent electromagnetic breather valve |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115949761A (en) * | 2023-02-24 | 2023-04-11 | 江苏恒双自控设备制造有限公司 | Vacuum pneumatic butterfly valve |
| CN115949761B (en) * | 2023-02-24 | 2023-08-22 | 江苏恒双自控设备制造有限公司 | Vacuum pneumatic butterfly valve |
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| Publication number | Publication date |
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| CN111927962B (en) | 2021-01-26 |
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Effective date of registration: 20230406 Address after: 224700 No. 888, Jianjiang Road, jiulongkou Town, Jianhu County, Yancheng City, Jiangsu Province Patentee after: JIANGSU JIULONG VALVE MANUFACTURE Co.,Ltd. Address before: 262500 No. 8979 Yunmenshan South Road, Qingzhou City, Weifang City, Shandong Province Patentee before: WEIFANG ENGINEERING VOCATIONAL College |