CN209743687U - Cryogenic axial flow type check valve - Google Patents
Cryogenic axial flow type check valve Download PDFInfo
- Publication number
- CN209743687U CN209743687U CN201920419638.7U CN201920419638U CN209743687U CN 209743687 U CN209743687 U CN 209743687U CN 201920419638 U CN201920419638 U CN 201920419638U CN 209743687 U CN209743687 U CN 209743687U
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- CN
- China
- Prior art keywords
- valve
- valve seat
- ring
- seat
- axial flow
- 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.)
- Withdrawn - After Issue
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- Check Valves (AREA)
Abstract
The utility model relates to a deep cooling axial flow type check valve, which comprises a valve body, a valve seat compression ring, a valve seat locking ring, a guide seat fixed in the valve body, a bush fixed on the guide seat, a valve shaft connected with the bush in a sliding way, a valve clack fixedly connected with one end of the valve shaft and a valve seat arranged in the valve body, wherein a spring used for enabling the valve clack to reset and play a role of buffering is arranged between the valve clack and the bush; a section of internal thread is arranged in the valve cavity of the valve body, external threads matched with the internal thread are arranged on the valve seat pressing ring and the valve seat locking ring, the valve seat pressing ring is screwed into the valve cavity to tightly press the valve seat, and the valve seat locking ring is screwed into the valve cavity to tightly press the valve seat pressing ring. The utility model adopts a double-thread structure with pre-tightened front section thread and anti-loose rear section thread, which not only has simple structural design, but also can effectively improve the sealing reliability of the valve and prolong the service life of the valve; the valve seat pressing ring and the valve seat locking ring jointly provide pretightening force, so that enough sealing pretightening force of the sealing gasket ring can be provided, and the sealing of the valve cavity and the valve seat part is ensured.
Description
Technical Field
The utility model relates to the technical field of valves, especially, relate to an axial-flow type check valve of cryrogenic.
Background
As shown in fig. 1, a conventional axial flow check valve mainly includes a valve body (serial number 8), a valve flap (serial number 4), a valve shaft (serial number 5), a valve seat (serial number 3), a valve seat compression ring (serial number 2), a bush (serial number 7), a spring (serial number 6), and a valve seat packing (serial number 12).
The working principle of the axial flow type check valve is as follows: the opening and closing of the flap is determined by the pressure difference between the inlet and outlet ends of the valve. When the pressure at the inlet end is greater than the sum of the pressure cycles at the outlet end to expand the spring force, the flap opens. The valve flap is always in the open state as long as the pressure difference exists, but the opening degree is determined by the magnitude of the pressure difference. When the sum of the pressure at the outlet end and the elastic force of the spring is larger than the pressure difference at the inlet end, the valve clack is closed and is always in a closed state.
The main drawbacks of conventional axial flow check valves are: after slamming for a plurality of times, the valve seat pressing ring is easy to loosen, so that the sealing pretightening force of the valve seat filler is insufficient, and the sealing performance is seriously influenced; in addition, under the impact of high-speed backflow media, the valve clack can cause violent slamming on the valve seat, and the sealing surface is easy to scour and wear.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a cryrogenic axial-flow type check valve can prevent that the medium from assaulting back disk seat clamping ring screw thread not hard up, guarantees sealed effect.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
A cryogenic axial flow check valve comprises a valve body, a valve seat compression ring, a valve seat locking ring, a guide seat fixed in the valve body, a bushing fixed on the guide seat, a valve shaft in sliding connection with the bushing, a valve clack fixedly connected with one end of the valve shaft and a valve seat arranged in the valve body and matched with the valve clack, wherein a spring used for enabling the valve clack to reset and playing a role of buffering is arranged between the valve clack and the bushing; the valve cavity of the valve body is provided with a section of internal thread, the valve seat pressing ring and the valve seat locking ring are both provided with external threads matched with the internal thread, the valve seat pressing ring is screwed into the valve cavity to tightly push the valve seat, and the valve seat locking ring is screwed into the valve cavity to tightly push the valve seat pressing ring.
Furthermore, a lip-shaped sealing ring is arranged between the valve seat and the valve body.
Further, the outer wall of the valve seat is of a stepped structure, the inner cavity of the valve body is of a stepped structure matched with the valve seat, and the lip-shaped sealing ring is installed on the stepped surface.
Further, a sealing gasket ring is arranged between the valve seat and the valve body.
further, the sealing gasket ring is installed on the stepped surface of the valve seat.
Wherein, the spring suit is on the valve shaft.
compared with the prior art, the utility model discloses following beneficial effect has:
The utility model adopts a double-thread connection structure with pre-tightening of the front section thread and anti-loosening of the rear section thread, which not only has simple structural design and convenient operation, but also can effectively improve the sealing reliability of the valve and prolong the service life of the valve; the valve seat pressing ring and the valve seat locking ring jointly provide pretightening force, so that enough sealing pretightening force of the sealing gasket ring can be provided, and the sealing of the valve cavity and the valve seat part is ensured.
Drawings
FIG. 1 is a schematic diagram of a prior art configuration;
Fig. 2 is a schematic structural diagram of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 2 at I;
In the figure: 1-valve seat locking ring, 2-valve seat pressing ring, 3-valve seat, 4-valve flap, 5-valve shaft, 6-spring, 7-bushing, 8-valve body, 9-guide seat, 10-valve seat backing ring, 11-lip seal ring and 12-valve seat filler.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings.
as shown in fig. 2 and 3, the utility model discloses an axial-flow check valve of cryrogenic, including valve body 8, disk seat catch 1, disk seat clamping ring 2, be fixed in guide holder 9 in the valve body 8, be fixed in bush 7 on the guide holder 9, with 7 sliding connection's of bush valve shaft 5, with 5 one end fixed connection's of valve shaft valve clack 4 and install in the valve body 8 with 4 assorted disk seats 3 of valve clack are equipped with between valve clack 4 and the bush 7 and are used for making valve clack 4 reset and play the spring 6 of cushioning effect simultaneously, and the spring 6 suit is on valve shaft 5.
A section of internal thread is arranged in a valve cavity of the valve body 8, external threads matched with the internal thread are arranged on the valve seat lock ring 1 and the valve seat press ring 2, the valve seat press ring 2 is screwed into the valve cavity to tightly press the valve seat 3, the valve seat lock ring 1 is screwed into the valve cavity to tightly press the valve seat press ring 2, and a double-thread connection structure with pre-tightening of front section threads and anti-loosening of rear section threads is formed. Both the valve seat press ring 2 and the valve seat lock ring 1 are provided with wrench grooves, so that the valve seat press ring and the valve seat lock ring can be screwed in conveniently.
A lip-shaped sealing ring 11 and a sealing gasket ring 10 are arranged between the valve seat 3 and the valve body 8. The outer wall of the valve seat 3 is of a stepped structure, the inner cavity of the valve body 8 is provided with a stepped structure matched with the valve seat 3, the lip-shaped sealing ring 11 and the sealing backing ring 10 are arranged on different stepped surfaces, and the sealing backing ring 10 is positioned between the valve seat pressing ring 2 and the lip-shaped sealing ring 11.
When the sealing device is installed, the lip-shaped sealing ring 11 and the sealing gasket ring 10 are sleeved in the valve seat 3 to form a valve seat assembly and are installed in the valve cavity together, then the valve seat pressing ring 2 is screwed into the valve cavity to tightly push the valve seat 3, so that enough sealing pretightening force of the sealing gasket ring 10 is provided, and the sealing of the valve cavity and the valve seat part is ensured; subsequently, disk seat check ring 1 screw in valve pocket tightly pushes up disk seat clamping ring 2 to it is not hard up to prevent to receive the media impact back disk seat clamping ring 2 screw thread, leads to sealing backing ring 10 pretightning force not enough, thereby influences sealed effect. The utility model discloses a anterior segment screw pretension, the locking double thread connection structure of back end screw thread, not only structural design is simple, and convenient operation can effectively improve the sealing reliability of valve moreover, has prolonged valve life.
Of course, the present invention can be embodied in many other forms without departing from the spirit or essential attributes thereof, and it should be understood that various changes and modifications can be made by one skilled in the art without departing from the spirit or essential attributes thereof, and that such changes and modifications are intended to be included within the scope of the appended claims.
Claims (6)
1. A copious cooling axial flow type check valve comprises a valve body, a guide seat fixed in the valve body, a bushing fixed on the guide seat, a valve shaft connected with the bushing in a sliding mode, a valve clack fixedly connected with one end of the valve shaft and a valve seat mounted in the valve body and matched with the valve clack, wherein a spring used for enabling the valve clack to reset and playing a buffering role is arranged between the valve clack and the bushing.
2. The cryogenic axial flow check valve of claim 1, wherein: a lip-shaped sealing ring is arranged between the valve seat and the valve body.
3. The cryogenic axial flow check valve of claim 2, wherein: the outer wall of the valve seat is of a stepped structure, the inner cavity of the valve body is of a stepped structure matched with the valve seat, and the lip-shaped sealing ring is installed on the stepped surface.
4. the cryogenic axial flow check valve of claims 1, 2, or 3, wherein: a sealing gasket ring is arranged between the valve seat and the valve body.
5. The cryogenic axial flow check valve of claim 4, wherein: the sealing gasket ring is arranged on the stepped surface of the valve seat.
6. The cryogenic axial flow check valve of claim 1, wherein: the spring is sleeved on the valve shaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920419638.7U CN209743687U (en) | 2019-03-29 | 2019-03-29 | Cryogenic axial flow type check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920419638.7U CN209743687U (en) | 2019-03-29 | 2019-03-29 | Cryogenic axial flow type check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209743687U true CN209743687U (en) | 2019-12-06 |
Family
ID=68719145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920419638.7U Withdrawn - After Issue CN209743687U (en) | 2019-03-29 | 2019-03-29 | Cryogenic axial flow type check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209743687U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826983A (en) * | 2019-03-29 | 2019-05-31 | 成都成高阀门有限公司 | A kind of deep cooling axial flow type check valve |
-
2019
- 2019-03-29 CN CN201920419638.7U patent/CN209743687U/en not_active Withdrawn - After Issue
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109826983A (en) * | 2019-03-29 | 2019-05-31 | 成都成高阀门有限公司 | A kind of deep cooling axial flow type check valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20191206 Effective date of abandoning: 20200914 |