CN2542892Y - Internal balancing pneumatic stop valve - Google Patents
Internal balancing pneumatic stop valve Download PDFInfo
- Publication number
- CN2542892Y CN2542892Y CN 02232356 CN02232356U CN2542892Y CN 2542892 Y CN2542892 Y CN 2542892Y CN 02232356 CN02232356 CN 02232356 CN 02232356 U CN02232356 U CN 02232356U CN 2542892 Y CN2542892 Y CN 2542892Y
- Authority
- CN
- China
- Prior art keywords
- valve
- cylinder
- valve rod
- flap
- rod
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to an inner balanced pneumatic stop valve of simple structure, easy maintenance and long service life; a valve body (16) is connected with an air cylinder (3), the upper end of the air cylinder is connected with a valve cover (22), a valve rod (2) runs through the lower wall of the air cylinder, the upper part of the valve rod is positioned inside the air cylinder, while the lower part is positioned inside the valve body (16); the lower end of the valve rod is connected with a valve clack (11), the underside of the valve clack (11) is provided with a sealing ring (12), the valve clack (11) is a sleeve with the upper end opens, and the upper part of the valve clack is placed in a ferrule that is formed by the downward extension of the lower wall of the air cylinder (3), the inner top of the valve clack is provided with a spring which is circularly sleeved on the lower part of the valve rod; the upper end of the valve rod is connected with a piston (1) and is positioned inside the air cylinder, the sir cylinder is provided with a control air inlet (4), the valve cover is provided with a vent hole (21); the lower end part of the valve rod is provided with an axial vent hole (25) that runs through the valve cavity ran though by the air inlet (9), the valve rod is provided with a radial vent hole (26) that runs through the inner cavity of the valve clack and is communicated with the axial vent hole (25). The utility model is suitable for using as the switch valve of the gas transmission pipeline.
Description
Technical field
The utility model belongs to the valve of closure or openness fluid passage.
Background technique
A kind of air bladder cut-off valve that conveyance fluid in the prior art (gas) is used, produce pressure by controlling gas input cylinder body, make diaphragm deformation, pressure spring and promote piston motion is simultaneously realized the unlatching of valve or is closed (comprising normal close type and open type); In the gas of removing controls when input,, spring reset makes valve closing or unlatching, and that realizes thus that fluid (gas) carries opens or end.This air bladder cut-off valve component are more, except valve body, valve seat, valve rod, diaphragm seal, piston, cylinder body, spring and necessary O type circle, screw, nut etc., also be provided with parts such as diaphragm, seal sleeve, sealing astragal, lining, cylinder body also comprises upper cylinder cover and following cylinder cap, its complex structure, the cost height, maintenance is difficulty; And also there are many defectives in this valve, comprise: the elastomer diaphragm cracky, diaphragm seal as closure valve is shorter working life, when causing pilot pressure unstable when the system pressure shakiness, spring bears alternating stress, easily produces tired and damages, and the lifting travel of piston, valve rod need be adjusted in the use, adjust when inaccurate, influence the working life of valve.
Summary of the invention
Technical problem to be solved in the utility model is the deficiency that overcomes air bladder cut-off valve in the described prior art, provides structure fairly simple, and volume is less, required component are less, technology capability is good, and cost is low relatively, a kind of Internal Balanced Pneumatic Valve of long service life.
The technological scheme that the utility model Internal Balanced Pneumatic Valve adopts is to be provided with suction port at valve body one end, the other end is provided with the air outlet, the valve rod lower end is fixed with seal ring, its special way is to be associated with cylinder on the valve body, the cylinder upper end is associated with valve gap, valve rod passes the cylinder lower wall, and valve rod top is positioned at cylinder, and the bottom is positioned at valve body; The valve rod lower end is associated with flap, and described seal ring places below the flap, and flap is that its top of sleeve shape of upper end open is placed on the cylinder lower wall to downward lasso, and overhead has spring shackle to be placed in stem lower portion in the flap; The valve rod upper end is associated with piston and is positioned at cylinder, offers the import of control gas on the cylinder, offers vent on the valve gap; The valve rod underpart offers axial vent and runs through the valve pocket that suction port connects, and having radially on the valve rod, vent runs through the flap inner chamber and connects with described axial vent.
Described flap inner ring sleeve comprises outer ring big spring and inner ring little spring in the spring of valve rod.
The control gas import of being offered on the cylinder runs through the cylinder chamber that cylinder is positioned at the piston below, and the vent of being offered on the valve gap runs through the cylinder chamber that cylinder is positioned at the piston top.
Promptly not when cylinder input control gas, under spring action, flap is pushed up down under the normality, and piston is depressed simultaneously together with the seal ring of piston rod and lower end thereof, with the valve seat sealing, blocks suction port and air outlet institute communication channel; When cylinder input control gas, piston below cylinder cavity pressure increases, and pushes up on the piston, move simultaneously together with piston rod, flap and seal ring, valve seat is opened, and opens suction port and air outlet institute communication channel (this moment, spring was compressed, and piston top cylinder intracavity gas is discharged from the vent on the valve gap).During the gas of removing controls input, spring reset, the valve seat sealing returns to normal.This valve is a kind of Normally closed type stop valve.
The axial vent of valve rod underpart and the radially setting of vent, make the flap inner chamber and connect with the valve pocket air-flow, when seal ring on the flap and valve seat driving fit, flap inner chamber and main pipe gas pressure balancing, thereby make sealing more reliable and more stable, and make spring not be subjected to the influence of alternating stress, can prolong greatly its working life.
The utility model is provided with piston owing to be associated with cylinder on valve body in the cylinder, have the import of control gas on the cylinder, the cylinder lower end is provided with flap, is provided with spring in the flap, control gas is done the switching of input/elimination, the unlatching that just can realize valve is with closed, so compare with existing intimate air bladder cut-off valve, the required component of this valve greatly reduce, structure is greatly simplified, and the volume of valve can dwindle, manufacture cost reduces, and the technology capability of valve improves, and it is convenient that the maintenance of valve also becomes; Because valve rod is provided with axially and vent radially, guarantee flap inner chamber and main pipe pressure balance again, making spring in the flap avoid alternating stress influences, and spring is prolonged working life, and the bulk life time of valve also can prolong.
Description of drawings
Fig. 1 is the utility model structural representation.
Embodiment
The Internal Balanced Pneumatic Valve of present embodiment, valve body 16 1 ends are provided with suction port 9, the other end is provided with air outlet 17, valve rod 2 lower ends are fixed with seal ring 12, through nut 19, packing ring 18 and bolted on connection cylinder 3 is arranged on the valve body 16, there is valve gap 22 cylinder 3 upper ends through nut 23, packing ring 24 and bolted on connection, and valve rod 2 passes cylinder 3 lower walls, valve rod 2 tops are positioned at cylinder 3, and the bottom is positioned at valve body 16; Valve rod 2 lower ends through nut 15, packing ring 14 and compressing tablet 13 be associated with flap 11 and below set seal ring 12; Flap 11 is placed on cylinder 3 lower walls to downward lasso for its top of sleeve shape of upper end open, and overhead has big spring 10 and little spring 8 to be located on valve rod 2 bottoms in the flap 11; Valve rod 2 upper ends are associated with piston 1 and are positioned at cylinder 3, offer control gas import 4 on the cylinder 3 and run through cylinder 3 and be positioned at cylinder chamber below the piston 1, offer vent 21 on the valve gap 22 and run through cylinder 3 and be positioned at cylinder chamber above the piston 1; The valve rod underpart offers axial vent 25 and runs through the valve pocket that suction port 9 is connected, and having radially on the valve rod, vent 26 runs through the flap inner chamber and connects with axial vent 25; Be embedded with O type circle in the annular groove of piston side, be provided with rubber mat plate 5 between piston and valve body, be embedded with O type circle 6 in the annular groove of piston rod, piston is provided with O type circle 7 to downward lasso, and piston rod and cylinder joint are provided with rubber mat plate 20.
Claims (2)
1, Internal Balanced Pneumatic Valve, valve body (16) one ends are provided with suction port (9), the other end is provided with air outlet (17), valve rod (2) lower end is fixed with seal ring (12), it is characterized in that being associated with on the valve body (16) cylinder (3), cylinder (3) upper end is associated with valve gap (22), and valve rod (2) passes cylinder (3) lower wall, valve rod (2) top is positioned at cylinder (3), and the bottom is positioned at valve body (16); Valve rod (2) lower end is associated with flap (11), described seal ring (12) places below the flap (11), flap (11) is placed on cylinder (3) lower wall to downward lasso for its top of sleeve shape of upper end open, and the interior overhead of flap (11) has spring shackle to be placed in valve rod (2) bottom; Valve rod (2) upper end is associated with piston (1) and is positioned at cylinder (3), offers control gas import (4) on the cylinder (3), offers vent (21) on the valve gap (22); The valve rod underpart offers axial vent (25) and runs through the valve pocket that suction port (9) is connected, and having radially on the valve rod, vent (26) runs through the flap inner chamber and connects with axial vent (25).
2, Internal Balanced Pneumatic Valve as claimed in claim 1 is characterized in that described spring comprises that big spring (10) and its upper end of little spring (8) rely on below the cylinder lower wall, and its lower end relies on above the flap lower wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02232356 CN2542892Y (en) | 2002-04-16 | 2002-04-16 | Internal balancing pneumatic stop valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02232356 CN2542892Y (en) | 2002-04-16 | 2002-04-16 | Internal balancing pneumatic stop valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2542892Y true CN2542892Y (en) | 2003-04-02 |
Family
ID=33707778
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02232356 Expired - Fee Related CN2542892Y (en) | 2002-04-16 | 2002-04-16 | Internal balancing pneumatic stop valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2542892Y (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100363672C (en) * | 2006-02-16 | 2008-01-23 | 烟台冰轮股份有限公司 | Cut-off non-return differential pressure valve |
| CN101876380A (en) * | 2009-04-30 | 2010-11-03 | 上海熊猫机械(集团)有限公司 | Low-resistance slow-closure type check valve |
| CN101956829A (en) * | 2010-10-27 | 2011-01-26 | 温州市鹿城新鹿水处理自控设备厂 | Micro-control flow regulating valve |
| CN102192345A (en) * | 2010-03-02 | 2011-09-21 | 上海熊猫机械(集团)有限公司 | Hydraulic control valve |
| CN102364171A (en) * | 2011-11-17 | 2012-02-29 | 科林环保装备股份有限公司 | Gas-cutoff bypass valve opening protection device |
| CN102042413B (en) * | 2009-10-16 | 2012-12-12 | 陈来明 | Solid powder valve |
| CN107664222A (en) * | 2016-07-27 | 2018-02-06 | 新莱应材科技有限公司 | right-angle valve |
-
2002
- 2002-04-16 CN CN 02232356 patent/CN2542892Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100363672C (en) * | 2006-02-16 | 2008-01-23 | 烟台冰轮股份有限公司 | Cut-off non-return differential pressure valve |
| CN101876380A (en) * | 2009-04-30 | 2010-11-03 | 上海熊猫机械(集团)有限公司 | Low-resistance slow-closure type check valve |
| CN102042413B (en) * | 2009-10-16 | 2012-12-12 | 陈来明 | Solid powder valve |
| CN102192345A (en) * | 2010-03-02 | 2011-09-21 | 上海熊猫机械(集团)有限公司 | Hydraulic control valve |
| CN101956829A (en) * | 2010-10-27 | 2011-01-26 | 温州市鹿城新鹿水处理自控设备厂 | Micro-control flow regulating valve |
| CN102364171A (en) * | 2011-11-17 | 2012-02-29 | 科林环保装备股份有限公司 | Gas-cutoff bypass valve opening protection device |
| CN107664222A (en) * | 2016-07-27 | 2018-02-06 | 新莱应材科技有限公司 | right-angle valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030402 Termination date: 20100416 |