CN216975893U - Check valve - Google Patents
Check valve Download PDFInfo
- Publication number
- CN216975893U CN216975893U CN202123341425.3U CN202123341425U CN216975893U CN 216975893 U CN216975893 U CN 216975893U CN 202123341425 U CN202123341425 U CN 202123341425U CN 216975893 U CN216975893 U CN 216975893U
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- valve
- piston
- piston rod
- clack
- cylinder sleeve
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Abstract
A check valve comprises a valve seat (12), a valve clack (9) is placed on the top of the valve seat, and the top of a valve body (8) is hermetically connected with a valve cover (1), and is characterized in that a damper is installed on the top surface of the valve cover and comprises a cap-shaped cylinder sleeve (4), a sealing gasket (6) is arranged between the cylinder sleeve and the valve cover, a piston (5) is arranged in the cylinder sleeve and connected with one end of a piston rod (3), the piston rod penetrates through the valve cover in a matched mode, a sealing ring (7) is arranged between the piston rod and the valve cover, the other end of the piston rod is connected with the valve clack, and a pore (2) penetrates through the end surface of the piston; the cylinder sleeve is filled with hydraulic oil. When the fluid flows in the forward direction or the reverse direction, the damper can enable the valve clack to move slowly, and the water hammer effect can be prevented.
Description
Technical Field
The present invention relates to a check valve for preventing reverse flow of fluid in a pipe.
Background
The check valve is used for preventing the fluid in the pipeline from flowing reversely, and the structure of the check valve comprises a valve body, a valve seat and a valve clack, when the fluid flows forwards, the forward pressure of the fluid causes the valve clack to move upwards, the valve clack is separated from the valve seat, and the valve is opened; when the fluid flows reversely, the valve flap moves downwards due to the dead weight of the valve flap and the reverse pressure of the fluid, the valve flap covers the valve seat, and the valve is closed. The fluid flow enables the valve to open and close quickly, which can create a water hammer effect that can cause damage to the piping system.
Disclosure of Invention
In view of the shortcomings of the prior art, the present invention provides a check valve that enables a valve to be opened or closed slowly when a fluid flows in a forward direction or in a reverse direction.
The technical scheme of the invention is that the check valve comprises a valve seat 12, a valve clack 9 is placed on the top of the valve seat, and a valve cover 1 is hermetically connected to the top of a valve body 8, and the check valve is characterized in that a damper is installed on the top surface of the valve cover and comprises a cap-shaped cylinder sleeve 4, a sealing gasket 6 is arranged between the cylinder sleeve and the valve cover, a piston 5 is arranged in the cylinder sleeve and connected with one end of a piston rod 3, the piston rod penetrates through the valve cover in a matching mode, a sealing ring 7 is also arranged between the piston rod and the valve cover, the other end of the piston rod is connected with the valve clack, and a pore 2 penetrates through the end face of the piston.
The invention is characterized in that when fluid enters from the inlet 10, the inlet pressure of the fluid causes the valve clack to rise, the piston compresses the air on the upper part of the valve clack, the air is discharged into the lower part of the valve clack through the fine hole, and the piston slowly rises due to the damping action of the air on the piston; when the fluid flows reversely (enters from the outlet 11), the valve clack moves downwards due to the dead weight of the valve clack and the reverse pressure of the fluid, the piston moves downwards along with the valve clack, the piston compresses air at the lower part of the valve clack, the air is discharged into the upper part of the valve clack through the fine holes, and the piston moves downwards slowly due to the damping effect of the air on the piston; this prevents the occurrence of the water hammer effect.
Drawings
FIG. 1 is a schematic view of the present invention.
The reference symbols respectively denote: 1-valve cover, 2-pore, 3-piston rod, 4-cylinder sleeve, 5-piston, 6-sealing gasket, 7-sealing ring, 8-valve body, 9-valve clack, 10-inlet, 11-outlet and 12-valve seat.
Detailed Description
Specific embodiments of the present invention will now be described with reference to the accompanying drawings.
The utility model provides a check valve, it includes disk seat 12, valve clack 9 has been shelved at the disk seat top, the top sealing connection of valve body 8 has valve gap 1, characterized by, install the attenuator at the top surface of valve gap, the attenuator includes cap-shaped cylinder liner 4, be equipped with sealed pad 6 between cylinder liner and the valve gap, be equipped with piston 5 in the cylinder liner, the piston is connected with the one end of piston rod 3, the valve gap is passed to the piston rod cooperation, also be equipped with sealing washer 7 between piston rod and the valve gap, the other end and the valve clack of piston rod are connected, it has pore 2 to run through on the terminal surface of piston.
When the fluid flows in the positive direction (i.e. the fluid flows from the inlet 10 to the outlet 11), the positive pressure of the fluid raises the valve flap, the piston compresses air on the upper part of the valve flap, the air is discharged into the lower part of the valve flap through the fine holes, and the piston is slowly raised due to the damping effect of the air on the piston; when the fluid flows reversely, the valve clack is moved downwards by the dead weight of the valve clack and the reverse pressure of the fluid, the piston moves downwards along with the valve clack, the piston compresses air at the lower part of the valve clack, the air is discharged into the upper part of the valve clack through the fine holes, and the piston moves downwards slowly due to the damping effect of the air on the piston; the smaller the pore diameter of the fine pores, the larger the damping force.
In order to improve the damping effect, the cylinder sleeve can be filled with hydraulic oil.
Claims (2)
1. The utility model provides a check valve, it includes disk seat (12), valve clack (9) have been shelved at the disk seat top, the top sealing connection of valve body (8) has valve gap (1), characterized by, install the attenuator at the top surface of valve gap, the attenuator includes cap-shaped cylinder liner (4), be equipped with sealed pad (6) between cylinder liner and the valve gap, be equipped with piston (5) in the cylinder liner, the piston is connected with the one end of piston rod (3), the valve gap is passed with the piston rod cooperation, be equipped with sealing washer (7) between piston rod and the valve gap, the other end and the valve clack of piston rod are connected, it has pore (2) to run through on the terminal surface of piston.
2. The check valve of claim 1, wherein the cylinder liner is filled with hydraulic oil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123341425.3U CN216975893U (en) | 2021-12-29 | 2021-12-29 | Check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123341425.3U CN216975893U (en) | 2021-12-29 | 2021-12-29 | Check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216975893U true CN216975893U (en) | 2022-07-15 |
Family
ID=82347735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123341425.3U Active CN216975893U (en) | 2021-12-29 | 2021-12-29 | Check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216975893U (en) |
-
2021
- 2021-12-29 CN CN202123341425.3U patent/CN216975893U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A check valve Effective date of registration: 20230330 Granted publication date: 20220715 Pledgee: Bank of Nanjing Co.,Ltd. Taizhou Branch Pledgor: JIANGSU JIANGHUA VALVES CO.,LTD. Registration number: Y2023320000170 |