CN212616425U - Double-cylinder pneumatic belt manual wedge gate valve - Google Patents
Double-cylinder pneumatic belt manual wedge gate valve Download PDFInfo
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- CN212616425U CN212616425U CN202020097154.8U CN202020097154U CN212616425U CN 212616425 U CN212616425 U CN 212616425U CN 202020097154 U CN202020097154 U CN 202020097154U CN 212616425 U CN212616425 U CN 212616425U
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Abstract
The utility model discloses a pneumatic manual wedge gate valve of taking of double cylinder relates to a valve that is arranged in control fluid medium to dampe the effect among the pipe-line system, and its structure mainly includes: the pneumatic double-cylinder double-piston valve comprises a valve body, a valve seat, a flashboard, a lower valve rod, a gasket, a valve cover, a slipknot bolt, a packing gland, a double-cylinder pneumatic piston device, an upper valve rod, a hand wheel support, a lubricating oil cup, a hand wheel, a protective cover of a screw rod, a locking nut, a bearing gland, a one-way thrust ball bearing, a driving nut, a quick pneumatic and manual switching device, a valve rod nut, a cylinder support, a packing device and an upper sealing seat. Two pistons are arranged in the double-cylinder pneumatic piston device: the lower piston and the upper piston are arranged, the shaft sleeve is arranged on the lower piston, when the bottom end of the upper piston touches the boss on the upper portion of the shaft sleeve, the upper piston drives the lower piston to descend together, the flashboard moves downwards to perform deceleration motion with accelerated speed increased instantly, excessive collision between the sealing surface of the flashboard and the sealing surface of the valve seat is avoided, and the sealing surface is protected.
Description
Technical Field
The utility model relates to a wedge gate valve among the valve structure specifically indicates double-cylinder pneumatic belt manual wedge gate valve.
Background
Gate valves are widely used control components in modern industry, primarily for opening and closing in piping systems. Particularly in the chemical industry, many reactants are in a liquid state, and the flow rate and the on-off of the reactants are controlled by a gate valve. The existing gate valve generally has two pairs of sealing surfaces, when the gate valve is opened and closed, the two pairs of sealing surfaces which are contacted with a valve seat have relative friction, are easy to damage, and seriously affect the sealing performance and the service life of the gate valve; in addition, especially when the gate valve is closed, excessive collision is easily generated between the sealing surface of the gate plate and the sealing surface of the valve seat, and even the phenomenon of 'blocking' of the gate plate can occur. Therefore, aiming at the defects of the existing gate valve, the design of the double-cylinder pneumatic belt manual wedge type gate valve with the buffering function has very important significance.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that overcome prior art's defect and provide a double-cylinder pneumatic belt manual wedge gate valve with buffer function.
The utility model discloses the technical problem that solve is realized through following scheme:
a double-cylinder pneumatic belt manual wedge type gate valve comprises a valve body, a valve seat, a gate plate, a lower valve rod, a gasket, a valve cover, a slipknot bolt, a packing gland, a double-cylinder pneumatic piston device, an upper valve rod, a hand wheel support, a lubricating oil cup, a hand wheel, a protective cover of a screw rod, a locking nut, a bearing gland, a one-way thrust ball bearing, a driving nut, a quick pneumatic manual switching device, a valve rod nut, a cylinder support, a packing device and an upper sealing seat.
And a packing device and a packing gland for sealing packing are arranged between the lower valve rod and the valve cover.
The pneumatic piston device comprises a lower cylinder cover arranged on the valve cover, a cylinder body arranged on the lower cylinder cover in a sealing mode and an upper cylinder cover arranged on the cylinder body in a sealing mode.
The lower piston and the upper piston are arranged in the cylinder body in a lifting motion manner, and the outer circumferential surface of the lower piston is provided with a dynamic sealing piece which is in contact with the inner circumferential surface of the cylinder body: an O-shaped sealing ring.
The lower piston is provided with a shaft sleeve, when the bottom end of the upper piston touches a boss on the upper part of the shaft sleeve, the upper piston drives the lower piston to descend together, and in the process, the flashboard moves downwards to perform deceleration motion with accelerated speed increased instantly, so that excessive collision between the sealing surface of the flashboard and the sealing surface of the valve seat is avoided.
The autorotation structure of the driving nut is characterized in that a pair of one-way thrust ball bearings is arranged between the driving nut and the hand wheel bracket.
And the hand wheel support is provided with an oil cup for lubricating the one-way thrust ball bearing.
The hand wheel is connected to the upper end of the driving nut in a transmission manner, and the upper end of the driving nut is also provided with threads and a locking nut for fastening the hand wheel.
The top of the hand wheel is provided with a protective cover for sealing the screw rod.
Compared with the prior art, the utility model mainly designs a double-cylinder pneumatic belt manual wedge gate valve with buffer gear, and it can alleviate the valve effectively and seal the face and the sealed face of flashboard between the wearing and tearing that face caused because the produced impact of piston downstream when closing. Meanwhile, the phenomenon that the flashboard is blocked can be avoided.
Drawings
Fig. 1 is a schematic sectional view of the present invention.
Fig. 2 is a left side view of fig. 1.
Fig. 3 is a schematic cross-sectional structural view of a double cylinder pneumatic piston device.
Detailed Description
The present invention will be described in further detail with reference to the above drawings and specific embodiments.
A double-cylinder pneumatic belt manual wedge gate valve is shown in figures 1 and 2, and relates to a valve for fluid medium interception in a pipeline system, which mainly comprises the following structures: the valve comprises a valve body 1, a valve seat 2, a gate plate 3, a lower valve rod 4, a gasket 5, a valve cover 6, a loose joint bolt 7, a packing gland 8, a double-cylinder pneumatic piston device 9, an upper valve rod 10, a hand wheel support 11, a lubricating oil cup 12, a hand wheel 13, a protective cover 14 of a screw rod, a locking nut 15, a bearing gland 16, a one-way thrust ball bearing 17, a driving nut 18, a quick pneumatic manual switching device 19, a valve rod nut 20, a cylinder support 21, a packing device 22, an upper sealing seat 23 and the like.
The valve body 1 is of a straight-through type, namely a water inlet and a water outlet which are horizontally communicated are respectively arranged at the left end and the right end of the valve body 1, and the water inlet and the water outlet are both arranged on flange surfaces so as to be conveniently connected and installed with a pipeline; the valve seat 2 is arranged between the water inlet and the water outlet, specifically, a valve seat groove is arranged in the valve body 1 between the water inlet and the water outlet, and the valve seat 2 is fixedly arranged in the valve seat groove in a nested manner.
The gate plate 3 is inserted into the valve seat from top to bottom, and the sealing surface of the gate plate 3 is in single-side forced sealing fit with the sealing surface of the valve seat 2; the top of the flashboard 3 is provided with a T-shaped groove of an integrated structure, and the T-shaped groove is nested and assembled with the lower end of the lower valve rod 4.
The top of the valve body 1 is arranged to be a middle flange face, the valve cover 6 is fixedly connected to the middle flange face at the top of the valve body 1 through a hexagon nut, and a gasket 5 is arranged on a plane where the valve cover 6 is in contact with the middle flange face, so that connection and sealing are formed between the valve cover 6 and the valve body 1.
The lower valve rod 4 is a moving part which does lifting movement in the valve body 1, the lower end of the valve rod 4 is nested with a T-shaped groove arranged on the flashboard 3, the upper end of the valve rod passes through the valve cover 6 and enters the pneumatic piston device 9, a packing device 22 and an upper sealing seat 23 are arranged between the lower valve rod 4 and the valve cover 6 and are used as movable sealing elements, specifically, a packing box for packing is arranged at the top of the valve cover 6, a packing gland (8) is arranged on the upper surface of the packing box and is used for sealing the packing in the packing box, and the packing gland 8 is fixedly arranged on the valve cover 6 through an eyelet bolt 7.
The pneumatic piston device 9 and the cylinder support 21 thereof are arranged above the valve cover 6, the structure of the pneumatic piston device comprises a lower cylinder cover 91 arranged on the cylinder support 21, a cylinder body arranged on the lower cylinder cover 91 in a sealing way and an upper cylinder cover 98 arranged on the cylinder body in a sealing way, a closed piston cavity is formed among the lower cylinder cover 91, the cylinder body and the upper cylinder cover 98, the lifting motion of the lower piston 92 and the upper piston 96 is completed in the cylinder body, and a movable sealing part contacted with the inner circumferential surface of the cylinder body is arranged on the outer circumferential surface of the lower piston 92: an O-ring 93.
The upper end of the lower valve rod 4 extends into the pneumatic piston device 9, namely the upper end of the lower valve rod 4 penetrates through the lower cylinder cover 91 and is fixedly connected with the upper piston 96 through the valve rod nut 20, the lower end of the upper valve rod 10 is nested and assembled with a T-shaped groove formed in the upper piston 96 in the pneumatic piston device, so that the lower piston 92 and the upper piston 96 can be driven to move up and down by alternately feeding air into an air inlet and an air outlet, the lower valve rod 4 and the upper valve rod 10 are driven to move up and down synchronously, the flashboard 3 and the valve seat 2 can be sealed and opened and closed, and an O-shaped ring serving as a dynamic sealing element is arranged between the lower valve rod 4 and the lower cylinder cover 91.
The lower piston 92 is provided with a fixedly installed shaft sleeve 94, when the bottom end of the upper piston 96 touches a boss at the upper part of the shaft sleeve 94, the upper piston 96 drives the lower piston 92 to descend together, and in the process, the gate plate 3 moves downwards to perform deceleration motion with accelerated speed increased instantly, so that excessive collision between the sealing surface of the gate plate 3 and the sealing surface of the valve seat 2 is avoided, and the sealing surface is protected to a certain extent;
the shaft sleeve 94 and the lower valve rod 4 are on the same axis, the upper end of the upper valve rod 10 extends out of the upper cylinder cover 98 to be exposed, the top end of the exposed upper valve rod (10) is provided with a protective cover 14 of a screw rod, and a dynamic sealing element is also arranged between the upper valve rod 10 and the upper cylinder cover 98: an O-shaped sealing ring.
The upper cylinder cover 98 is upwards provided with an integrated hand wheel support 11, the driving nut 18 and the hand wheel 13 are both arranged at the top of the hand wheel support 11, in particular, the driving nut 18 is arranged in the hand wheel support 11 by taking a pair of one-way thrust ball bearings 17 as a rotating support, the pair of one-way thrust ball bearings 17 are sealed by a bearing gland 15 arranged at the top of the hand wheel support 11, and in addition, the hand wheel support 11 is also provided with a lubricating oil cup 12 for lubricating the one-way thrust ball bearings 17; meanwhile, the upper end of the driving nut 18 passes through the bearing gland 15 and is exposed at the top of the hand wheel support 11, the exposed part of the driving nut 18 is designed to be a hexagonal shaft structure, and the hand wheel 13 is matched with the hexagonal shaft structure of the driving nut 18 through a hexagonal hole to form transmission connection, namely the hand wheel 13 rotates and drives the driving nut 18 to rotate on the hand wheel support 11; the upper end of the driving nut 18 is also provided with a locking nut 15 which is connected with the hand wheel 13 in a threaded manner and fastens the hand wheel 13.
The pneumatic-manual quick switching device 19 is installed on the hand wheel support 11, and can realize quick switching of two opening and closing driving modes, namely manual driving and pneumatic driving, so that if one driving mode fails, the other driving mode can be used for replacing the failed driving mode to close the valve emergently, subsequent maintenance work is facilitated, and the safety and the reliability of the valve are improved to a certain extent.
The above is only the preferred embodiment of the present invention, so all the equivalent changes or modifications made by the structure, features and principles in accordance with the claims of the present invention are included in the claims of the present invention.
Claims (9)
1. The utility model provides a manual wedge gate valve of pneumatic area of double-cylinder, includes valve body (1), disk seat (2), flashboard (3), lower valve rod (4), packing ring (5), valve gap (6), slipknot bolt (7), gland (8), double-cylinder pneumatic piston device (9), go up valve rod (10), hand wheel support (11), lubricating cup (12), hand wheel (13), safety cover (14) of screw rod, lock nut (15), bearing cover (16), thrust ball bearing (17), drive nut (18), quick pneumatic manual auto-change over device (19), valve rod nut (20), cylinder support (21), packing device (22), go up seal receptacle (23), characterized by double-cylinder pneumatic piston device (9) in be equipped with two pistons: a lower piston (92) and an upper piston (96); the lower piston (92) is provided with a shaft sleeve (94), when the bottom end of the upper piston (96) touches a boss on the upper part of the shaft sleeve, the upper piston (96) drives the lower piston (92) to descend together, and in the process, the gate plate (3) moves downwards to perform deceleration motion with accelerated speed increased instantly, so that excessive collision between the sealing surface of the gate plate (3) and the sealing surface of the valve seat (2) is avoided.
2. The double-cylinder pneumatic belt manual wedge gate valve according to claim 1, wherein said pneumatic piston device (9) comprises a lower cylinder cover (91) mounted on the valve cover (6), said lower piston (92) and upper piston (96) are arranged in the cylinder body in a lifting motion, and a dynamic sealing member contacting with the inner circumferential surface of the cylinder body is arranged on the outer circumferential surface of the lower piston (92): an O-ring (93).
3. The double-cylinder pneumatic belt manual wedge gate valve according to claim 1, wherein the rotation structure of the driving nut (18) is a pair of one-way thrust ball bearings (17) arranged between the driving nut (18) and the hand wheel support (11).
4. The double-cylinder pneumatic belt manual wedge gate valve according to claim 1, wherein an oil cup (12) for lubricating the one-way thrust ball bearing (17) is arranged on the hand wheel support (11).
5. The double-cylinder pneumatic belt manual wedge gate valve as claimed in claim 1, wherein the hand wheel support (11) is provided with a rapid pneumatic manual switching device (19) for switching a pneumatic manual opening and closing mode.
6. The double-cylinder pneumatic belt manual wedge gate valve according to claim 1, wherein the lower end of the lower valve rod (4) is connected with the gate plate (3) in a T-shaped groove mode, and the upper end of the lower valve rod extends out of the valve cover (6) and the packing device (22) to be connected with an upper piston (96) of the double-cylinder pneumatic piston device (9).
7. The double-cylinder pneumatic belt manual wedge gate valve as claimed in claim 1, wherein the hand wheel (13) is connected to the upper end of the driving nut (18) in a transmission manner, and the upper end of the driving nut (18) is further provided with threads and a locking nut (15) for fastening the hand wheel (13).
8. The double-cylinder pneumatic belt manual wedge gate valve according to claim 1, characterized in that a shield (14) for sealing the screw is arranged on the top of the hand wheel (13).
9. The double-cylinder pneumatic belt manual wedge gate valve according to claim 1, characterized in that a packing device (22) and a packing gland (8) for sealing packing are arranged between the lower valve rod (4) and the valve cover (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020097154.8U CN212616425U (en) | 2020-01-16 | 2020-01-16 | Double-cylinder pneumatic belt manual wedge gate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020097154.8U CN212616425U (en) | 2020-01-16 | 2020-01-16 | Double-cylinder pneumatic belt manual wedge gate valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212616425U true CN212616425U (en) | 2021-02-26 |
Family
ID=74728671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020097154.8U Expired - Fee Related CN212616425U (en) | 2020-01-16 | 2020-01-16 | Double-cylinder pneumatic belt manual wedge gate valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212616425U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113532780A (en) * | 2021-08-26 | 2021-10-22 | 青岛科技大学 | Loose joint screw type quick combination square quality system with guide device |
| CN113883319A (en) * | 2021-10-27 | 2022-01-04 | 大连中和聚能自动控制***有限公司 | Manual-automatic integrated pneumatic actuator capable of automatically switching |
| CN114198507A (en) * | 2021-12-07 | 2022-03-18 | 浙江石化阀门有限公司 | High-pressure quick pneumatic stop valve |
-
2020
- 2020-01-16 CN CN202020097154.8U patent/CN212616425U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113532780A (en) * | 2021-08-26 | 2021-10-22 | 青岛科技大学 | Loose joint screw type quick combination square quality system with guide device |
| CN113883319A (en) * | 2021-10-27 | 2022-01-04 | 大连中和聚能自动控制***有限公司 | Manual-automatic integrated pneumatic actuator capable of automatically switching |
| CN113883319B (en) * | 2021-10-27 | 2023-08-25 | 大连中和聚能自动控制***有限公司 | Manual-automatic integrated pneumatic actuator capable of being automatically switched |
| CN114198507A (en) * | 2021-12-07 | 2022-03-18 | 浙江石化阀门有限公司 | High-pressure quick pneumatic stop valve |
| CN114198507B (en) * | 2021-12-07 | 2024-04-09 | 浙江石化阀门有限公司 | High-pressure quick pneumatic stop valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20210226 Termination date: 20220116 |