CN203836293U - Novel check valve controlled to be closed - Google Patents
Novel check valve controlled to be closed Download PDFInfo
- Publication number
- CN203836293U CN203836293U CN201420034578.4U CN201420034578U CN203836293U CN 203836293 U CN203836293 U CN 203836293U CN 201420034578 U CN201420034578 U CN 201420034578U CN 203836293 U CN203836293 U CN 203836293U
- Authority
- CN
- China
- Prior art keywords
- valve
- valve body
- piston
- closed
- safety check
- 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.)
- Expired - Lifetime
Links
- 238000013016 damping Methods 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 210000004907 gland Anatomy 0.000 claims abstract description 8
- 239000000956 alloy Substances 0.000 claims description 6
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 229910017052 cobalt Inorganic materials 0.000 claims description 6
- 239000010941 cobalt Substances 0.000 claims description 6
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical group [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 claims description 6
- 238000007363 ring formation reaction Methods 0.000 claims description 5
- 238000007789 sealing Methods 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
Abstract
The utility model relates to a novel check valve controlled to be closed, and belongs to the field of nuclear power and thermal power valves. The novel check valve is installed on a main water supply pipeline of a nuclear power unit and a thermal power unit and prevents a medium from flowing back, the closing time of the valve is prolonged, and water hammering pressure produced when the valve is closed in the pipeline is reduced. The novel check valve controlled to be closed is of a Y-shaped damping structure with a piston, a valve runner is designed in a streamline mode, a valve body and a valve cover are connected through a bolt, a valve clack and a valve rod are of an integrated structure, the valve rod is connected with the piston through a gland, the piston moves along with the valve clack in a middle cavity in the upper portion of the valve body, and a chock block is fixed in the middle cavity of the valve body through a four-element ring, a pressing plate and a hexagon bolt. According to the novel check valve, the medium in the water supply pipeline is effectively prevented from flowing back, the problem of great pressure fluctuation and vibration produced when the valve is closed in the pipeline is solved, and the medium flowing resistance is reduced.
Description
Technical field
The utility model relates to a kind of novel controlled and closes safety check, belongs to nuclear power, thermoelectricity valve field.
Background technique
At present, the safety check being arranged on nuclear power, fired power generating unit main feed water pipe road adopts Swing check valve or the T-shaped Lift check valve of band damping more.When Swing check valve is closed, pipeline pressure fluctuation is larger, can produce high vibration, causes the damage of line fracture or pipeline accessories; Though pressure surge is little when the T-shaped Lift check valve of band damping is closed, pipe vibration is light, and media flow resistance is large.
Summary of the invention
The purpose of this utility model is to provide a kind of piston damping that utilizes and postpones the valve shut-in time, reduces the novel controlled of water hammer pressure and closes safety check.
For achieving the above object, the technological scheme that the utility model adopts is: adopt Y type band piston damping structure, valve body inner flow passage is by airflow design, and valve body lumen top and outlet stool place are connected with balance tube; Valve body and valve gap are with bolts, flap and valve rod are integral type structure, valve rod is connected by gland with piston, piston moves with flap at valve body top lumen, Rectifier plate is fixed on valve body lumen by four cyclizations, pressing plate and hex head bolt, and Rectifier plate and piston space form damping cavity, between Rectifier plate and valve rod, are provided with throttle clearance, by gap adjustment damping cavity pressure, the shut-in time of control valve and water hammer pressure.
Described novel controlled close check valve receptacle directly on valve body built-up welding form, sealing surface is cobalt base hard alloy, adopts conical surface seal with flap.
Described novel controlled is closed check valve body bottom and is provided with four guiding ribs, guiding rib inside surfacing cobalt base hard alloy, and flap moves up and down in guiding rib.
The beneficial effects of the utility model are: novel controlled is closed safety check and adopted Y valve body, and media flow resistance is little; At valve body lumen, a piston is installed, is connected with flap, in valve body, slide up and down together.When medium flows backwards, by the gap adjusting piston damping cavity internal pressure between valve rod and Rectifier plate, control flap movement velocity, postpone the valve shut-in time, reduce and close water hammer pressure.
Accompanying drawing explanation
Fig. 1 is the structural representation that novel controlled is closed safety check;
In figure, 1. valve body, 2. flap, 3. valve rod, 4. Rectifier plate, 5. pressing plate, 6. four cyclizations, 7. hex head bolt, 8. piston, 9. gland, 10. balance tube, 11. valve gaps, 12. bolts, 13. guiding ribs, 14. valve seats
Embodiment
As shown in the figure, novel controlled is closed safety check, it is characterized in that, comprise valve body 1, flap 2, piston 8, valve gap 11, valve gap 11 is fixed on valve body 1 by bolt 12, balance tube 10 is welded in valve body 1 lumen top and outlet stool place, flap 2 is structure as a whole with valve rod 3, valve rod 3 is compressed and is connected by gland 9 with piston 8, valve rod 3 is threaded connection with gland 9, four cyclizations 6 are embedded in valve body 1 groove, by pressing plate 5 and hex head bolt 7, Rectifier plate 4 is fixed on to valve body 1 lumen, at Rectifier plate 4 and 8, piston, form damping cavity, 3 of Rectifier plate 4 and valve rods are provided with throttle clearance, valve body 1 bottom is provided with four guiding ribs 13, guiding rib 13 inside surfacing cobalt base hard alloys, valve seat 14 directly on valve body 1 built-up welding form, sealing surface is cobalt base hard alloy.
The working principle that novel controlled is closed safety check is as follows:
When medium drag flow, under the effect of medium power, on flap 2, move valve opening; When medium flows backwards, medium enters piston 8 epicoeles by balance tube 10, under the effect of medium power and deadweight, flap 2 and piston 8 move downward, and medium in compression damping chamber increases damping cavity internal pressure, by the gap adjustment damping cavity internal pressure of 4 of valve rod 3 and Rectifier plates, control flap 2 movement velocitys, postpone the valve shut-in time, reduce and close water hammer pressure.
Claims (6)
1. novel controlled is closed safety check, it is characterized in that, comprises valve body, valve seat, flap, piston, valve gap, adopt Y type band piston damping structure, valve body lumen top and outlet stool place are connected with balance tube, valve seat directly on valve body built-up welding form, sealing surface is cobalt base hard alloy; Valve body and valve gap are with bolts, and flap and valve rod are integral type structure, and valve rod is connected by gland with piston, and piston moves with flap at valve body top lumen, and Rectifier plate is fixed on valve body lumen by four cyclizations, pressing plate and hex head bolt.
2. novel controlled according to claim 1 is closed safety check, it is characterized in that: valve body adopts Y type straight flow structure, and runner is by airflow design, and valve body lumen top and outlet stool place are provided with balance tube.
3. novel controlled according to claim 1 is closed safety check, it is characterized in that: valve body lower portion is provided with four guiding ribs, guiding rib surface overlaying cobalt base hard alloy.
4. novel controlled according to claim 1 is closed safety check, it is characterized in that: valve rod is compressed and is connected by gland with piston, and valve rod and gland are threaded connection.
5. novel controlled according to claim 1 is closed safety check, it is characterized in that: four cyclizations are set in valve body recess, by pressing plate and hex head bolt, Rectifier plate is fixed on to valve body lumen, at Rectifier plate and piston space, forms damping cavity.
6. novel controlled according to claim 1 is closed safety check, it is characterized in that: between Rectifier plate and valve rod, be provided with throttle clearance, damping adjusting cavity pressure, control valve shut-in time and water hammer pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420034578.4U CN203836293U (en) | 2014-01-17 | 2014-01-17 | Novel check valve controlled to be closed |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420034578.4U CN203836293U (en) | 2014-01-17 | 2014-01-17 | Novel check valve controlled to be closed |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203836293U true CN203836293U (en) | 2014-09-17 |
Family
ID=51514135
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420034578.4U Expired - Lifetime CN203836293U (en) | 2014-01-17 | 2014-01-17 | Novel check valve controlled to be closed |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203836293U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103759050A (en) * | 2014-01-17 | 2014-04-30 | 哈电集团哈尔滨电站阀门有限公司 | Novel check valve controlled to be closed |
| CN107143672A (en) * | 2017-06-08 | 2017-09-08 | 苏州金钜松机电有限公司 | A kind of check-valves |
| CN110594419A (en) * | 2019-09-12 | 2019-12-20 | 大连大高阀门股份有限公司 | Angle type lifting check valve |
-
2014
- 2014-01-17 CN CN201420034578.4U patent/CN203836293U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103759050A (en) * | 2014-01-17 | 2014-04-30 | 哈电集团哈尔滨电站阀门有限公司 | Novel check valve controlled to be closed |
| CN107143672A (en) * | 2017-06-08 | 2017-09-08 | 苏州金钜松机电有限公司 | A kind of check-valves |
| CN110594419A (en) * | 2019-09-12 | 2019-12-20 | 大连大高阀门股份有限公司 | Angle type lifting check valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140917 |
|
| CX01 | Expiry of patent term |