CN114198507B - High-pressure quick pneumatic stop valve - Google Patents

High-pressure quick pneumatic stop valve Download PDF

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Publication number
CN114198507B
CN114198507B CN202111481317.8A CN202111481317A CN114198507B CN 114198507 B CN114198507 B CN 114198507B CN 202111481317 A CN202111481317 A CN 202111481317A CN 114198507 B CN114198507 B CN 114198507B
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China
Prior art keywords
valve
partition plate
communicated
cylinder
valve shaft
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.)
Active
Application number
CN202111481317.8A
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Chinese (zh)
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CN114198507A (en
Inventor
项光武
李华贵
雷磊
王忠渊
项炜
王忠淼
储嵩
项力胜
项良海
杨扬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang Petrochemical Valve Co ltd
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Zhejiang Petrochemical Valve Co ltd
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Priority to CN202111481317.8A priority Critical patent/CN114198507B/en
Publication of CN114198507A publication Critical patent/CN114198507A/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • 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
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Fluid-Driven Valves (AREA)

Abstract

The invention discloses a high-pressure quick pneumatic stop valve, which relates to the field of valves and comprises a valve body, a valve shaft and a cylinder body assembly, wherein an inlet, an outlet and a flow channel for communicating the inlet and the outlet are arranged in the valve body, the valve shaft is slidably arranged at the center of the cylinder body assembly, the tail end of the valve shaft corresponds to the outlet, the output end of the cylinder body assembly is connected with the valve shaft, a sleeve for fixedly installing the cylinder body assembly is arranged in the valve body, and the flow channel is positioned at the outer side of the circumference direction of the sleeve. The invention has the advantages of good working stability and quick opening and closing.

Description

High-pressure quick pneumatic stop valve
Technical Field
The invention relates to the field of valves, in particular to a high-pressure quick pneumatic stop valve.
Background
The existing ultrahigh-pressure pneumatic stop valve is a stop valve controlled by a high-pressure air source, and is used for controlling the on-off of fluid in a high-pressure system to realize on-off control. The pneumatic control stop valve in the current market cannot meet the requirement that the opening and closing time is less than or equal to 0.02 seconds.
Disclosure of Invention
In order to overcome the defects of the background technology, the invention provides the high-pressure quick pneumatic stop valve which is good in working stability and quick to open and close.
The invention adopts the technical scheme that: the utility model provides a high-pressure quick pneumatic stop valve, includes valve body, valve shaft and cylinder body subassembly, be equipped with the runner of import, export and intercommunication two in the valve body, the valve shaft is slided and is installed cylinder body subassembly's central point put and its end with the export corresponds, cylinder body subassembly's output with the valve shaft is connected, be equipped with in the valve body and supply cylinder body subassembly fixed mounting's sleeve, the runner is located the outside of sleeve circumferencial direction.
The cylinder assembly includes:
a cylinder block mounted on the sleeve inner wall;
a rear cover plate fixedly installed at a rear end position of the cylinder block;
a rear partition plate fixedly installed in the cylinder body and located at an inner side of the rear cover plate;
the middle partition plate is fixedly arranged in the cylinder body, positioned in front of the rear partition plate and forms a first cavity with the rear partition plate;
the rear piston is slidably arranged in the first cavity and is fixedly connected with the valve shaft;
the cylinder body and the valve body are provided with a first exhaust channel and a second exhaust channel which are communicated with the outside, and the rear partition plate is provided with a first air channel communicated with the first exhaust channel and a first air port communicated with the first air channel;
the middle partition plate is provided with a second air passage communicated with the second exhaust passage and a second air port communicated with the second air passage; the first air port and the second air port are oppositely arranged.
The cylinder assembly further includes:
a front cover plate fixedly installed at a front end position of the cylinder block;
a front baffle plate fixedly installed in the cylinder body and positioned at the inner side of the front cover plate and forming a second cavity with the middle baffle plate;
a front piston slidably mounted between the second cavities and slidably engaged with the valve shaft;
the cylinder body and the valve body are also provided with a third exhaust channel and a fourth exhaust channel which are communicated with the outside, and the front partition plate is provided with a fourth air channel which is communicated with the fourth exhaust channel and a fourth air port which is communicated with the fourth air channel;
the middle partition plate is also provided with a third air passage communicated with the third exhaust passage and a third air port communicated with the third air passage; the third air port and the fourth air port are oppositely arranged.
The first air passage, the second air passage, the third air passage and the fourth air passage are all annular;
the first air port, the second air port, the third air port and the fourth air port are uniformly distributed in the circumferential direction.
The valve shaft is sleeved with a clamp, a first pressing block is arranged on one side of the rear piston, and the first pressing block and the rear piston are matched and clamped by the clamp.
The valve body is provided with a first step at one side of the rear partition plate, which is far away from the rear cover plate, and the rear cover plate and the first step are matched, clamped and fixed with the rear partition plate;
the valve body is provided with a second step on one side of the middle partition plate and a second pressing block on the other side of the middle partition plate, and the second pressing block and the second step are matched and clamped to fix the middle partition plate.
The front piston is provided with a sleeve part penetrating through the inner hole of the middle partition plate, and one end of the sleeve part is in contact fit with the rear piston.
And a sealing pair in sealing fit is arranged between the tail end of the valve shaft and the outlet.
And a sealing ring is arranged between the valve body and the cylinder body assembly and between the valve shaft and the cylinder body assembly.
The beneficial effects of the invention are as follows: according to the technical scheme, the cylinder assembly and the valve shaft are arranged at the central position of the valve body, the flow channel communicated with the inlet and the outlet is arranged at the circumferential position of the cylinder assembly, so that impulse can be applied to the cylinder assembly and the valve shaft when a medium flows, and the cylinder assembly can realize quick opening and quick closing of the valve by means of the impulse when the valve shaft is subjected to sliding control, so that the valve has the advantage of good working stability.
Drawings
Fig. 1 is a schematic structural diagram of a high-pressure quick pneumatic stop valve according to an embodiment of the present invention.
Fig. 2 is a cross-sectional view at A-A in fig. 1.
Fig. 3 is a cross-sectional view at B-B in fig. 1.
Detailed Description
Embodiments of the invention are further described below with reference to the accompanying drawings:
as shown in the figure, the high-pressure quick pneumatic stop valve comprises a valve body 1, a valve shaft 2 and a cylinder assembly 3, wherein an inlet 11, an outlet 12 and a flow channel 13 for communicating the inlet and the outlet are arranged in the valve body 1, the valve shaft 2 is slidably arranged at the center of the cylinder assembly 3, the tail end of the valve shaft corresponds to the outlet 12, the output end of the cylinder assembly 3 is connected with the valve shaft 2, a sleeve 14 for fixedly installing the cylinder assembly 3 is arranged in the valve body 1, and the flow channel 13 is positioned at the outer side of the sleeve 14 in the circumferential direction; according to the technical scheme, the cylinder assembly and the valve shaft are arranged at the central position of the valve body, the flow channel communicated with the inlet and the outlet is arranged at the circumferential position of the cylinder assembly, so that impulse can be applied to the cylinder assembly and the valve shaft when a medium flows, and the cylinder assembly can realize quick opening and quick closing of the valve by means of the impulse when the valve shaft is subjected to sliding control, so that the valve has the advantage of good working stability.
The cylinder assembly 3 comprises:
a cylinder block 31 mounted on an inner wall of the sleeve 14;
a rear cover plate 32 fixedly installed at a rear end position of the cylinder block 31;
a rear bulkhead 33 fixedly installed in the cylinder block 31 and located inside the rear cover plate 32;
a middle partition 34 fixedly provided in the cylinder block 31 in front of the rear partition 33 and forming a first cavity with the rear partition 33;
a rear piston 35 slidably installed in the first cavity and fixedly connected to the valve shaft 2;
the cylinder body 31 and the valve body 1 are provided with a first exhaust passage 4 and a second exhaust passage 5 which are communicated with the outside, and the rear partition plate 33 is provided with a first air passage 41 communicated with the first exhaust passage 4 and a first air port 42 communicated with the first air passage 41;
the middle partition 34 is provided with a second air passage 51 communicated with the second exhaust passage 5 and a second air port 52 communicated with the second air passage 51; the first port 42 and the second port 52 are oppositely oriented.
The cylinder assembly 3 further comprises:
a front cover plate 36 fixedly installed at a front end position of the cylinder block 31;
a front bulkhead 37 fixedly installed in the cylinder block 31 and located inside the front cover plate 36 and forming a second cavity with the middle bulkhead 34;
a front piston 38 slidably mounted between the second cavities and slidably engaged with the valve shaft 2;
the cylinder body 31 and the valve body 1 are also provided with a third exhaust passage 6 and a fourth exhaust passage 7 which are communicated with the outside, and the front partition plate 37 is provided with a fourth air passage 71 which is communicated with the fourth exhaust passage 7 and a fourth air port 72 which is communicated with the fourth air passage 71;
the middle partition 34 is also provided with a third air passage 61 communicated with the third exhaust passage 6 and a third air port 62 communicated with the third air passage 61; the third port 62 and the fourth port 72 are oppositely oriented.
The valve in the embodiment is a flange-connected pneumatic ultra-fast opening and closing and ultra-high pressure direct-current stop valve, the pneumatic mechanism adopts a built-in cylinder piston mechanism, no spring assistance is arranged, the flow direction of compressed air in the cylinder body is controlled by a pneumatic control element such as an electromagnetic valve, the piston is pushed to move, and the valve shaft is driven to complete the opening and closing action of the valve;
when the second exhaust channel and the fourth exhaust channel are used for air intake, the first exhaust channel 4 and the third exhaust channel 6 are used for air exhaust, the front piston is used for assisting the rear piston to move, the rear piston is connected with the valve shaft into a whole and synchronously moves, and the front piston and the rear piston overcome the acting force of a medium on the valve shaft to drive the valve shaft to move backwards so as to realize the opening of the valve;
when the first exhaust passage 4 and the third exhaust passage 6 are in air, the second exhaust passage and the fourth exhaust passage are in air exhaust, the first exhaust passage is in air intake to push the rear piston to move rightwards as shown in the figure, and the third exhaust passage is in air intake to push the front piston to move rightwards, but only the rear piston can push the valve shaft to close due to the sliding fit of the front piston and the valve shaft.
The first air passage 41, the second air passage 51, the third air passage 61 and the fourth air passage 71 are all annular; the first air port 42, the second air port 52, the third air port 62 and the fourth air port 72 are all uniformly distributed in the circumferential direction; the gas is uniformly circulated in the four air passages and discharged from the four air ports, and the number of each air port is four along the circumferential direction, so that the front piston and the rear piston are uniformly pressed when in motion, and the motion is stable.
The clamp 21 is sleeved on the valve shaft 2, a first pressing block 351 is arranged on one side of the rear piston 35, the clamp 21 is clamped by the first pressing block 351 and the rear piston 35 in a matched mode, and the rear piston is connected with the valve shaft through the fixed clamp, so that synchronous movement is achieved.
The valve body 1 is provided with a first step 15 at one side of a rear partition plate 33 far away from a rear cover plate 32, the rear cover plate 32 and the first step 15 are matched and clamped to fix the rear partition plate 33, and the rear partition plate is fixed through a first adjustment and the rear cover plate;
the valve body 1 is provided with a second step 16 on one side of the middle partition 34 and a second pressing block 17 is arranged on the other side of the middle partition 34, the second pressing block 17 and the second step 16 are matched and clamped to fix the middle partition 34, and the middle partition is fixed through the second pressing block and the second step.
The front piston 38 is provided with a sleeve part 381 penetrating through the inner hole of the middle partition 34, one end of the sleeve part 381 is in contact fit with the rear piston 35, and the rear piston is pushed by the front piston to move, so that the rear piston is contacted by the sleeve part.
A sealing pair in sealing fit is arranged between the tail end of the valve shaft 2 and the outlet 12.
Sealing rings 8 are arranged between the valve body 1 and the cylinder assembly 3 and between the valve shaft 2 and the cylinder assembly 3.
Calculating the opening and closing time:
the valve body is arranged on the valve bodyThere are 4 exhaust channels, the aperture of each hole is ∅, 4 annular air passages are arranged on the outer circle of the sleeve, and the annular air passages are respectively communicated with the 4 exhaust channels. 4 air ports are uniformly distributed on each air passage. The diameters of the air ports are ∅, the inner diameter of the cylinder body is ∅ 280, the outer diameter of the valve shaft is ∅, the flow rate of compressed air is 50 m/s, and the stroke of the valve shaft is 20mm when the valve is opened or closed; when the valve is closed, the volume into the first cavity is 0.785 x (28 2 －4 2 ）×2=1206（cm 3 ) The method comprises the steps of carrying out a first treatment on the surface of the The gas enters the first cavity and has 4 small holes, and the air inflow per second is 0.785 multiplied by 2 2 ×4×5000=62800（cm 3 /sec); the time required for the valve shaft to close is: 1206++62800=0.0192 (seconds);
the closing time required by the user is less than or equal to 0.02 seconds, and the conclusion is qualified.
Calculating the stress of the valve shaft during opening and closing:
when the valve is opened, the acting force of the medium on the valve shaft and the friction force generated by the O-shaped sealing rings at the outer circle and the inner hole of the piston are overcome, and the following calculation is performed at present:
1. force of medium against valve shaft: f (F) Medium (C) =0.785×40 2 ×4 2 =52752（N）
2. Calculating effective output force of the air cylinder:
(1) the driving force of the compressed air in the first cavity to the piston is as follows: 0.785× (280 2 －40 2 ）×0.8=48230（N）
(2) Effective output force of cylinder=48230×0.7=33761 (N) (0.7 is transmission coefficient)
(3) Since the effective output force of a single cylinder is 33761N < 52752N, when the valve is opened, an auxiliary cylinder is designed, and the resultant force of pistons of the two cylinders is 33761 multiplied by 2= 67522 (N) which is larger than 52752N, so that the valve can be opened.
(4) When the valve is opened, the second exhaust channel and the fourth exhaust channel are used for simultaneously feeding air, the front piston and the rear piston are respectively pushed to move leftwards, the front piston can prop the rear piston to help to push the valve shaft to move leftwards, once the sealing surface of the valve clack leaves the valve seat, the acting force of the medium on the valve shaft is immediately disappeared, and the valve shaft is easy to move. So the travel of the front piston is very small and only 5-6 mm is needed.
From the analysis, the design of the system can meet the requirement of realizing quick opening or quick closing in 0.02 seconds and the requirement of acting force of a cylinder required by opening or closing a valve.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art. Furthermore, in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
The skilled person will know: while the invention has been described in terms of the foregoing embodiments, the inventive concepts are not limited to the invention, and any modifications that use the inventive concepts are intended to be within the scope of the appended claims.

Claims (9)

1. The utility model provides a high-pressure quick pneumatic stop valve, includes valve body (1), valve shaft (2) and cylinder body subassembly (3), its characterized in that: an inlet (11), an outlet (12) and a runner (13) for communicating the inlet and the outlet are arranged in the valve body (1), the valve shaft (2) is slidably arranged at the center of the cylinder assembly (3) and the tail end of the valve shaft corresponds to the outlet (12), the head end of the valve shaft (2) is exposed out of the cylinder assembly (3) and faces the inlet (11), the output end of the cylinder assembly (3) is connected with the valve shaft (2), a sleeve (14) for fixedly installing the cylinder assembly (3) is arranged in the valve body (1), and the runner (13) is positioned at the outer side of the sleeve (14) in the circumferential direction;
the cylinder assembly (3) comprises:
a cylinder block (31) mounted on the inner wall of the sleeve (14);
a rear cover plate (32) fixedly mounted at a rear end position of the cylinder block (31);
a rear bulkhead (33) fixedly installed in the cylinder block (31) and located inside the rear cover plate (32);
a middle partition plate (34) fixedly arranged in the cylinder block (31) in front of the rear partition plate (33) and forming a first cavity with the rear partition plate (33);
a rear piston (35) which is slidably mounted in the first cavity and fixedly connected to the valve shaft (2);
the cylinder assembly (3) further comprises:
a front cover plate (36) fixedly mounted on the front end position of the cylinder block (31);
a front bulkhead (37) fixedly mounted in the cylinder block (31) and located inside the front cover plate (36) and forming a second cavity with the middle bulkhead (34);
a front piston (38) slidably mounted between the second cavities and slidably engaged with the valve shaft (2).
2. The high pressure quick pneumatic shut-off valve of claim 1, wherein: the cylinder assembly (3) comprises:
the cylinder body (31) and the valve body (1) are provided with a first exhaust channel (4) and a second exhaust channel (5) which are communicated with the outside, and the rear partition plate (33) is provided with a first air passage (41) communicated with the first exhaust channel (4) and a first air port (42) communicated with the first air passage (41);
a second air passage (51) communicated with the second exhaust passage (5) and a second air port (52) communicated with the second air passage (51) are arranged on the middle partition plate (34); the first port (42) and the second port (52) are oppositely oriented.
3. The high pressure quick pneumatic shut-off valve of claim 2, wherein: the cylinder assembly (3) further comprises:
the cylinder body (31) and the valve body (1) are also provided with a third exhaust channel (6) and a fourth exhaust channel (7) which are communicated with the outside, and the front partition plate (37) is provided with a fourth air channel (71) which is communicated with the fourth exhaust channel (7) and a fourth air port (72) which is communicated with the fourth air channel (71);
a third air passage (61) communicated with the third exhaust passage (6) and a third air port (62) communicated with the third air passage (61) are also arranged on the middle partition plate (34); the third port (62) and the fourth port (72) are oppositely oriented.
4. A high pressure quick pneumatic shut-off valve as in claim 3 wherein: the first air passage (41), the second air passage (51), the third air passage (61) and the fourth air passage (71) are all annular;
the first air port (42), the second air port (52), the third air port (62) and the fourth air port (72) are uniformly distributed in the circumferential direction.
5. The high pressure quick pneumatic shut-off valve of claim 2, wherein: the clamp (21) is sleeved on the valve shaft (2), a first pressing block (351) is arranged on one side of the rear piston (35), and the first pressing block (351) and the rear piston (35) are matched to clamp the clamp (21).
6. The high pressure quick pneumatic shut-off valve of claim 2, wherein: the cylinder body (31) is provided with a first step (15) at one side of the rear partition plate (33) far away from the rear cover plate (32), and the rear cover plate (32) and the first step (15) are matched and clamped to fix the rear partition plate (33);
the cylinder body (31) is provided with a second step (16) on one side of the middle partition plate (34) and a second pressing block (17) on the other side of the middle partition plate (34), and the second pressing block (17) and the second step (16) are matched and clamped to fix the middle partition plate (34).
7. A high pressure quick pneumatic shut-off valve as in claim 3 wherein: the front piston (38) is provided with a sleeve part (381) penetrating through an inner hole of the middle partition plate (34), and one end of the sleeve part (381) is in contact fit with the rear piston (35).
8. The high pressure quick pneumatic shut-off valve of claim 1, wherein: a sealing pair in sealing fit is arranged between the tail end of the valve shaft (2) and the outlet (12).
9. The high pressure quick pneumatic shut-off valve of claim 1, wherein: sealing rings (8) are arranged between the valve body (1) and the cylinder assembly (3) and between the valve shaft (2) and the cylinder assembly (3).
CN202111481317.8A 2021-12-07 2021-12-07 High-pressure quick pneumatic stop valve Active CN114198507B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111481317.8A CN114198507B (en) 2021-12-07 2021-12-07 High-pressure quick pneumatic stop valve

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Application Number Priority Date Filing Date Title
CN202111481317.8A CN114198507B (en) 2021-12-07 2021-12-07 High-pressure quick pneumatic stop valve

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CN114198507A CN114198507A (en) 2022-03-18
CN114198507B true CN114198507B (en) 2024-04-09

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5102093A (en) * 1991-05-14 1992-04-07 Southeastern Universities Research Association Fast valve
DE102009018768A1 (en) * 2009-04-24 2010-11-04 Sonnleitner, Adolf Harald Pressurizing medium-operatable actuators e.g. pneumatic actuators, for use in e.g. lacquering system, has switching/blocking seal closes compressed air leaking out not directly into free air chamber, and into ventilation chamber
CN201779321U (en) * 2010-09-06 2011-03-30 杨叶 High-pressure pneumatic emergency shutoff valve
CN203272969U (en) * 2013-05-31 2013-11-06 浙江百得自动化仪表有限公司 Large-aperture quick-closing and buffering pneumatic actuator for valve
CN203516753U (en) * 2013-09-17 2014-04-02 洪海云 Novel stop valve
CN211820814U (en) * 2020-03-12 2020-10-30 浙江石化阀门有限公司 High-pressure wedge gate valve
CN212616425U (en) * 2020-01-16 2021-02-26 兰州交通大学 Double-cylinder pneumatic belt manual wedge gate valve

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5102093A (en) * 1991-05-14 1992-04-07 Southeastern Universities Research Association Fast valve
DE102009018768A1 (en) * 2009-04-24 2010-11-04 Sonnleitner, Adolf Harald Pressurizing medium-operatable actuators e.g. pneumatic actuators, for use in e.g. lacquering system, has switching/blocking seal closes compressed air leaking out not directly into free air chamber, and into ventilation chamber
CN201779321U (en) * 2010-09-06 2011-03-30 杨叶 High-pressure pneumatic emergency shutoff valve
CN203272969U (en) * 2013-05-31 2013-11-06 浙江百得自动化仪表有限公司 Large-aperture quick-closing and buffering pneumatic actuator for valve
CN203516753U (en) * 2013-09-17 2014-04-02 洪海云 Novel stop valve
CN212616425U (en) * 2020-01-16 2021-02-26 兰州交通大学 Double-cylinder pneumatic belt manual wedge gate valve
CN211820814U (en) * 2020-03-12 2020-10-30 浙江石化阀门有限公司 High-pressure wedge gate valve

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