CN215891238U - Adjustable check valve - Google Patents
Adjustable check valve Download PDFInfo
- Publication number
- CN215891238U CN215891238U CN202122226873.2U CN202122226873U CN215891238U CN 215891238 U CN215891238 U CN 215891238U CN 202122226873 U CN202122226873 U CN 202122226873U CN 215891238 U CN215891238 U CN 215891238U
- Authority
- CN
- China
- Prior art keywords
- valve
- valve body
- guide rod
- spring
- sealing
- 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
Links
Images
Landscapes
- Check Valves (AREA)
- Details Of Valves (AREA)
Abstract
The utility model relates to an adjustable check valve, which comprises a valve body, a valve seat and a valve clack, wherein an inlet channel of the valve body is positioned in the vertical direction, an outlet channel is positioned in the horizontal direction, the valve seat is hermetically arranged in the inlet channel of the valve body by adopting a fastener, and the upper end surface of the valve clack is in guide fit with a guide hole on the valve body through a guide rod; the method is characterized in that: the pressure adjusting device is composed of a spring, a spring seat, an adjusting nut and a locking nut, the spring is installed between the upper end face of the valve body on the outer circular surface of the guide rod and the lower end face of the spring seat, the adjusting nut is installed on the upper end face of the spring seat and is in threaded connection with the guide rod, and the elastic force of the adjusting spring achieves adjusting opening and closing pressure through axial movement of the adjusting nut. By adjusting the spring force, the opening and closing pressure is adjusted, the accuracy and the closing speed of the opening pressure are improved, the closing water hammer is reduced, and the safety protection performance of system equipment is improved.
Description
Technical Field
The utility model belongs to the field of valves, and particularly relates to a lifting check valve.
Background
The lift check valve consists of valve body, valve seat, valve clack and guide unit, the valve seat is installed inside the inlet passage of the valve body, the lower end of the valve clack is matched with the valve body to constitute sealing pair, the valve body has inlet medium to overcome the valve clack gravity to push the valve clack to raise for opening, and when the inlet medium disappears, the valve clack gravity and the reverse medium pressure push the valve clack to descend to match with the valve seat to close the valve to prevent the medium from flowing backwards to damage the inlet side system equipment. The main disadvantages are: the opening pressure of the valve is determined by the gravity of the valve clack and the guide rod thereof, and the opening pressure is directly influenced by the processing errors of the valve clack and the guide rod, so that the setting precision of the opening pressure is poor; after the pressure of the inlet medium disappears, the reverse pressure of the outlet medium rapidly passes through the valve seat from the lower plane of the valve clack, the medium fluid hinders the descending speed of the valve clack to generate a large water hammer, and the reverse pressure of the medium generates radial thrust on the valve clack and the guide rod to increase the friction force between the guide rod and the guide hole of the valve body, so that the descending speed is influenced, even jamming is generated, and a large potential safety hazard is caused to system equipment at the inlet side.
Disclosure of Invention
Aiming at the defects in the prior art, the utility model provides the adjustable check valve which can adjust the opening and closing pressure, has accurate opening pressure, high closing speed, small water hammer and good protection performance on system equipment.
The technical scheme of the utility model comprises a valve body, a valve seat and a valve clack, wherein an inlet channel of the valve body is positioned in the vertical direction, an outlet channel is positioned in the horizontal direction, the valve seat is hermetically arranged in the inlet channel of the valve body by adopting a fastening piece, a sealing surface at the lower end of the valve clack is matched with a sealing surface of the valve seat to form a sealing pair, the circle center of the upper end surface of the valve clack is fixedly connected with the lower end of a guide rod, and the outer circular surface of the guide rod is in dynamic sealing fit with a guide hole on the valve body; the method is characterized in that: the pressure adjusting device is composed of a spring, a spring seat, an adjusting nut and a locking nut, the spring is installed between the upper end face of the valve body on the outer circular surface of the guide rod and the lower end face of the spring seat, the adjusting nut is installed on the upper end face of the spring seat and is in threaded connection with the guide rod, and the elastic force of the adjusting spring achieves adjusting opening and closing pressure through axial movement of the adjusting nut.
Preferably, a sealing sleeve is arranged between the valve body and the guide rod, an inner hole of the sealing sleeve is in dynamic sealing fit with the outer circular surface of the guide rod, the outer circular surface is in static sealing connection with the valve body, and the lower end of the spring is pressed in an annular groove on the upper end surface of the sealing sleeve.
Preferably, a Y-shaped sealing ring and an O-shaped sealing ring are arranged between the guide rod and the guide hole of the valve body, and the Y-shaped sealing ring is pressed between the guide hole of the valve body and the outer circular surface of the guide rod by a sealing sleeve to prevent granular media from entering between the guide rod and the guide sleeve.
Preferably, the upper end of the valve body is connected with a flange through a sealing cover, and the sealing cover is used for mounting the opening and closing pressure adjusting device in a totally-closed manner, so that zero leakage of the valve is realized.
Compared with the prior art, the utility model has the advantages that the opening and closing pressure adjusting device is arranged on the guide rod on the back of the valve clack, the opening and closing pressure is adjusted by adjusting the spring force, the accuracy of the opening pressure and the closing speed are improved, the water hammer is reduced, and the safety protection performance of system equipment is improved.
Drawings
Fig. 1 is a schematic structural view of the present invention.
In the figure: 1. the valve comprises a valve seat, 2, a sealing gasket, 3, a valve body, 4, a valve clack, 5, a guide rod, 6, an O-shaped ring, 7, a Y-shaped sealing ring, 8, a sealing sleeve, 9, a stud, 10, a nut, 11, a spring, 12, a spring seat, 13, a locking nut, 14 and a sealing cover.
Detailed Description
The adjustable check valve shown in fig. 1 comprises a valve body 3, a valve seat 1 and a valve flap 4, wherein an inlet channel of the valve body 3 is positioned in the vertical direction, an outlet channel is positioned in the horizontal direction, the valve seat 1 is hermetically installed in the inlet channel of the valve body 3 by adopting a fastening piece, a sealing gasket 2 is arranged between a connecting flange of the valve seat and the valve seat, a sealing surface at the lower end of the valve flap 4 is matched with a sealing surface of the valve seat 1 to form a sealing pair, the circle center of the upper end surface of the valve flap 4 is fixedly connected with the lower end of a guide rod 5, and the outer circular surface of the guide rod 5 is in dynamic sealing fit with a guide hole in the valve body 3 to ensure that the central line of the valve flap 4 is axially overlapped with the channel of the valve seat 1; the method is characterized in that: the upper end of the guide rod 5 is provided with an opening and closing pressure adjusting device, the opening and closing pressure adjusting device is composed of a spring 11, a spring seat 12, an adjusting nut 13 and a locking nut, the spring 11 is installed between the upper end face of the valve body 3 on the outer circular surface of the guide rod 5 and the lower end face of the spring seat 12, the adjusting nut 13 is installed on the upper end face of the spring seat 12 and is in threaded connection with the guide rod, through axial movement of the adjusting nut 13, the elastic force of the adjusting spring 11 achieves adjustment of opening and closing pressure, the accuracy of the opening pressure is improved, and when the valve is closed, the elastic force of the spring 11 pushes the guide rod 5 and the valve clack 4 to move downwards quickly, so that the blocking phenomenon is avoided, the water hammer is reduced, and the safety of system equipment is improved.
A sealing sleeve 8 is arranged between the valve body 3 and the guide rod 5, an inner hole of the sealing sleeve 8 is in dynamic sealing fit with an outer circular surface of the guide rod 5, the outer circular surface is in static sealing connection with the valve body 3, and the lower end of a spring 11 is pressed in an annular groove in the upper end face of the sealing sleeve 8, so that the guide performance is improved.
A Y-shaped sealing ring 7 and an O-shaped sealing ring 6 are arranged between the guide rod 5 and the guide hole of the valve body 3, the Y-shaped sealing ring 7 is pressed between the guide hole of the valve body 3 and the outer circular surface of the guide rod 5 through a sealing sleeve 8, and therefore particle media are prevented from entering between the guide rod 5 and the guide sleeve 8, the sealing performance of the valve is improved, and the service life is prolonged.
The upper end of the valve body 3 is connected with a sealing cover 14 through a flange, and the sealing cover 14 is used for mounting an opening and closing pressure adjusting device in a totally-closed manner in an inner cavity, so that zero leakage of the valve is realized. The sealing cover 14 is fixedly and hermetically arranged on the upper end surface of the valve body 3 through a stud 9 and a nut 10.
Claims (4)
1. An adjustable check valve comprises a valve body (3), a valve seat (1) and a valve clack (4), wherein an inlet channel of the valve body (3) is positioned in the vertical direction, an outlet channel is positioned in the horizontal direction, the valve seat (1) is hermetically installed in the inlet channel of the valve body (3) by adopting a fastening piece, a sealing surface at the lower end of the valve clack (4) is matched with a sealing surface of the valve seat (1) to form a sealing pair, the circle center of the upper end surface of the valve clack (4) is fixedly connected with the lower end of a guide rod (5), and the outer circle surface of the guide rod (5) is in dynamic sealing fit with a guide hole in the valve body (3); the method is characterized in that: the upper end of the guide rod (5) is provided with an opening and closing pressure adjusting device, the opening and closing pressure adjusting device is composed of a spring (11), a spring seat (12), an adjusting nut (13) and a locking nut, the spring (11) is installed between the upper end face of the valve body (3) on the outer circular surface of the guide rod (5) and the lower end face of the spring seat (12), and the adjusting nut (13) is installed on the upper end face of the spring seat (12) and is in threaded connection with the guide rod.
2. The adjustable check valve of claim 1, wherein: a sealing sleeve (8) is arranged between the valve body (3) and the guide rod (5), an inner hole of the sealing sleeve (8) is in dynamic sealing fit with an outer circular surface of the guide rod (5), the outer circular surface is in static sealing connection with the valve body (3), and the lower end of a spring (11) is pressed in an annular groove in the upper end surface of the sealing sleeve (8).
3. The adjustable check valve of claim 2, wherein: and a Y-shaped sealing ring (7) and an O-shaped sealing ring (6) are arranged between the guide rod (5) and the guide hole of the valve body (3), and the Y-shaped sealing ring (7) is pressed between the guide hole of the valve body (3) and the outer circular surface of the guide rod (5) by a sealing sleeve (8).
4. An adjustable check valve as defined in claim 1, 2 or 3 wherein: the upper end of the valve body (3) is connected with a sealing cover (14) in a flange mode, and the sealing cover (14) is used for mounting the opening and closing pressure adjusting device in a totally-enclosed mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122226873.2U CN215891238U (en) | 2021-09-15 | 2021-09-15 | Adjustable check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122226873.2U CN215891238U (en) | 2021-09-15 | 2021-09-15 | Adjustable check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215891238U true CN215891238U (en) | 2022-02-22 |
Family
ID=80338434
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122226873.2U Active CN215891238U (en) | 2021-09-15 | 2021-09-15 | Adjustable check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215891238U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023197196A1 (en) * | 2022-04-13 | 2023-10-19 | 中海石油气电集团有限责任公司 | High-compactness lng sampling and gasifying device having self-adaptive function |
-
2021
- 2021-09-15 CN CN202122226873.2U patent/CN215891238U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023197196A1 (en) * | 2022-04-13 | 2023-10-19 | 中海石油气电集团有限责任公司 | High-compactness lng sampling and gasifying device having self-adaptive function |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US2507851A (en) | Valve construction | |
| CA1175318A (en) | Annular piston valve | |
| US9611948B1 (en) | Valve assembly | |
| CN215891238U (en) | Adjustable check valve | |
| US20170108131A1 (en) | Check valve | |
| US9218005B2 (en) | Apparatus and method for reducing actuator thrust requirements in a control valve | |
| CN107061834B (en) | Built-in driving axial-flow type regulating valve | |
| US8820704B2 (en) | Guide member for use in a valve actuator assembly | |
| US4312376A (en) | Pressure-sustaining valve | |
| CN112682546B (en) | Pressure control valve | |
| CN202790713U (en) | Noise elimination check valve | |
| CN205781131U (en) | Micro-resistance pressure reduction type backflow preventer | |
| CN210484631U (en) | Angle type lifting check valve | |
| CN216768394U (en) | Back pressure valve | |
| AU2012211932B2 (en) | Valve | |
| CN214466354U (en) | Special check valve for oxygen | |
| CN210770333U (en) | Sand prevention gate valve | |
| US20210372533A1 (en) | Valve seat assembly | |
| CN208900256U (en) | Check valve-type fuel oil for vehicles pressure regulator | |
| CN219588170U (en) | Double-row pilot operated safety valve | |
| CN214662071U (en) | Floating adjustable valve seat structure for bidirectional large-diameter triple-eccentric butterfly valve | |
| CN110715084A (en) | Ultrahigh pressure safety valve | |
| CN114935026B (en) | Experimental valve for measuring valve force value, measuring method thereof and one-way valve | |
| CN218510188U (en) | Forged steel stop check valve | |
| CN212616550U (en) | Net weight type safety valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |