CN210290868U - Cryogenic axial flow type check valve - Google Patents
Cryogenic axial flow type check valve Download PDFInfo
- Publication number
- CN210290868U CN210290868U CN201920810477.4U CN201920810477U CN210290868U CN 210290868 U CN210290868 U CN 210290868U CN 201920810477 U CN201920810477 U CN 201920810477U CN 210290868 U CN210290868 U CN 210290868U
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- valve
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- valve body
- mounting seat
- clack
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Abstract
The utility model relates to a deep cooling axial flow type check valve, which comprises a valve body, a valve seat, a valve clack and a valve rod, wherein the inner cavity of the valve body is provided with a mounting seat, the center of the mounting seat is provided with a guide sleeve concentric with the central line of a valve body channel, one end of the valve rod is movably matched with the guide sleeve, the other end of the valve rod is fixedly connected with the center of the back surface of the valve clack, the inlet side of the mounting seat is provided with a cavity, and a return spring is arranged on the outer; the valve is characterized in that an auxiliary guide device is arranged between the valve clack and the mounting seat, the auxiliary guide device is composed of a guide rod fixedly connected to the back of the valve clack and a guide hole in the mounting seat, and the center lines of the guide rod and the guide hole are parallel to the center line of a valve body passage. The valve clack is prevented from being eccentric to the valve seat when being closed, the concentric matching of the valve clack and the valve seat is kept, and the sealing reliability is good.
Description
Technical Field
The utility model belongs to the valve field, concretely relates to axial-flow check valve. The utility model is suitable for a liquefied natural gas conveying system's check valve.
Background
The axial flow type check valve is important equipment of a liquefied natural gas conveying system pump station and a receiving station, and due to the ultralow temperature characteristic of the liquefied natural gas, the axial flow type check valve is a product which is commonly used in the liquefied natural gas conveying system. The ultralow-temperature axial-flow check valve for the liquefied natural gas with the publication number of CN106812982A comprises a valve body, wherein a hollow circular cavity is arranged in the valve body, a valve seat and a valve clack are arranged in the hollow cavity of the valve body, the valve clack is arranged at the center of the valve seat, a guide rod is arranged at the center of the valve clack, the other end of the guide rod is arranged in a guide sleeve, the guide sleeve is arranged on a guide seat, the guide seat is fixedly connected with the valve body, the guide sleeve and the guide seat are hollow annular cylinders, the guide sleeve is arranged in a cavity of the guide seat, and a spring is sleeved on the guide rod. An annular flow passage is formed between the outer circular surface of the guide seat and the wall of the middle cavity of the valve body, and when the valve clack is opened, a medium axially passes through the annular flow passage, so that the flow resistance is small. The main disadvantage is that the valve clack is positioned by a single point of the guide rod, and the concentricity deviation of the valve clack and the valve seat is easily caused when the valve clack is closed, so that the sealing pair leaks.
Disclosure of Invention
The utility model discloses to prior art's shortcoming, provide a cryrogenic axial-flow type check valve that sealing performance is reliable.
The technical scheme of the utility model includes the valve body, the disk seat, the valve clack, the valve rod, the valve clack has the circular arc sealed face of mutually supporting with the disk seat, the valve body inner chamber is equipped with the mount pad, the disc is fixed at the valve body inner chamber wall through radial joint bar outside this mount pad, form the annular runner between disc and the valve body inner chamber wall outside the mount pad, the mount pad center is equipped with the uide bushing concentric with valve body passageway central line, valve rod one end and uide bushing movable fit, the other end and valve clack back center fixed connection, the mount pad import side system has the cavity, install return spring at the valve rod outer circumference between the valve clack back and the mount pad cavity radial bottom plane, the disk seat adopts; the valve is characterized in that an auxiliary guide device is arranged between the valve clack and the mounting seat, the auxiliary guide device is composed of a guide rod fixedly connected to the back of the valve clack and a guide hole in the mounting seat, and the center lines of the guide rod and the guide hole are parallel to the center line of a valve body passage.
In the above technical scheme, the valve seat sealing surface is an elastic arc sealing surface, and an annular cavity is arranged between the outer side of the elastic arc sealing surface and the inner wall of the valve body channel.
In the above technical scheme, a through hole communicated with the annular flow passage is formed in the side wall of the cavity of the mounting seat.
The utility model has the advantages that the valve clack is provided with the auxiliary guiding device, the guide rod and the valve rod form parallel double guiding, the valve clack is prevented from being eccentric with the valve seat when being closed, the valve clack is kept to be concentrically matched with the valve seat, and the sealing reliability is good; the sealing surface of the valve seat adopts an elastic arc sealing surface, and the valve seat has the function of automatically adjusting concentricity when being matched with the valve clack, so that the sealing performance is improved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the figure: the valve comprises a valve body 1, a valve seat 2, a sealing ring 3, an annular cavity 4, a valve clack 5, a guide rod 6, a fixing nut 7, a return spring 8, a guide sleeve 9, a through hole 10, an installation seat 11, a valve rod 12 and a locking nut 13.
Detailed Description
The deep cooling axial flow type check valve as shown in figure 1 comprises a valve body 1, a valve seat 2, a valve clack 5 and a valve rod 12, wherein the valve clack 5 is provided with an arc sealing surface which is matched with the valve seat 2, an inner cavity of the valve body 1 is provided with an installation seat 11, the outer circular surface of the installation seat 11 is fixedly connected with the inner cavity wall of the valve body 1 through a radial connecting rib, an annular flow passage is formed between the outer circular surface of the installation seat 11 and the inner cavity wall of the valve body 1, the center of the installation seat 11 is provided with a guide sleeve 9 which is concentric with the central line of a channel of the valve body 1, the guide sleeve 9 is fixedly arranged on the installation seat 11 through a locking nut 13, one end of the valve rod 12 is movably matched with the guide sleeve 9, the other end of the valve rod is fixedly connected with the center of the back surface of the valve clack 5, the, a sealing ring 3 is arranged between the valve seat 2 and the inner wall of the inlet channel of the valve body 1; the auxiliary guide device is characterized in that an auxiliary guide device is arranged between the valve clack 5 and the mounting seat 11, the auxiliary guide device is composed of a guide rod 6 fixedly connected to the back face of the valve clack 5 and a guide hole in the mounting seat 11, one end of the guide rod 6 is fixedly mounted on the back face of the valve clack 5 through a fixing nut 7, the other end of the guide rod 6 is in movable fit with the guide hole, the center lines of the guide rod 6 and the guide hole are parallel to the center line of a channel of the valve body 1, and concentricity deviation between the valve clack 5 and.
The sealing surface of the valve seat 2 is an elastic arc sealing surface, an annular cavity 4 is arranged between the outer side of the elastic arc sealing surface and the inner wall of the channel of the valve body 1, and the concentricity between the valve clack 5 and the valve seat 2 is automatically adjusted when the valve clack and the valve seat are closed.
The side wall of the cavity of the mounting seat 11 is provided with a plurality of through holes 10 communicated with the annular flow passage, so that the opening resistance of the valve clack 5 is reduced.
Claims (3)
1. A cryogenic axial flow check valve comprises a valve body (1), a valve seat (2), a valve clack (5) and a valve rod (12), wherein the valve clack (5) is provided with an arc sealing surface matched with the valve seat (2), an inner cavity of the valve body (1) is provided with a mounting seat (11), the outer circular surface of the mounting seat (11) is fixedly connected to the inner cavity wall of the valve body (1) through a radial connecting rib, an annular flow channel is formed between the outer circular surface of the mounting seat (11) and the inner cavity wall of the valve body (1), a guide sleeve (9) concentric with the central line of a channel of the valve body (1) is arranged at the center of the mounting seat (11), one end of the valve rod (12) is movably matched with the guide sleeve (9), the other end of the valve clack (5) is fixedly connected with the center of the back of the valve clack (11), a cavity is arranged at the inlet side of, the valve seat (2) is fixedly arranged in the inlet channel of the valve body (1) by adopting external threads, and a sealing ring (3) is arranged between the valve seat (2) and the inner wall of the inlet channel of the valve body (1); the valve is characterized in that an auxiliary guide device is arranged between the valve clack (5) and the mounting seat (11), the auxiliary guide device is composed of a guide rod (6) fixedly connected to the back of the valve clack (5) and a guide hole in the mounting seat (11), and the center lines of the guide rod (6) and the guide hole are parallel to the center line of a passage of the valve body (1).
2. Cryogenic axial flow check valve according to claim 1, characterized in that the sealing surface of the valve seat (2) is a resilient circular arc sealing surface having an annular cavity (4) between its outer side and the inner wall of the passage of the valve body (1).
3. Cryogenic axial flow check valve according to claim 1 or 2, characterized in that the side wall of the cavity of the mounting seat (11) is provided with a plurality of through holes (10) communicating with the annular flow passage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920810477.4U CN210290868U (en) | 2019-05-31 | 2019-05-31 | Cryogenic axial flow type check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920810477.4U CN210290868U (en) | 2019-05-31 | 2019-05-31 | Cryogenic axial flow type check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210290868U true CN210290868U (en) | 2020-04-10 |
Family
ID=70071883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920810477.4U Active CN210290868U (en) | 2019-05-31 | 2019-05-31 | Cryogenic axial flow type check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210290868U (en) |
-
2019
- 2019-05-31 CN CN201920810477.4U patent/CN210290868U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 325102 Dongou Industrial Zone, Oubei street, Yongjia County, Wenzhou, Zhejiang Patentee after: Zhejiang bertley Technology Co.,Ltd. Address before: 325102 Dongou Industrial Zone, Oubei street, Yongjia County, Wenzhou, Zhejiang Patentee before: ZHEJIANG BOTELI VALVE Group |
|
| CP01 | Change in the name or title of a patent holder |