CN85204412U - Non-return valve with no water hammer - Google Patents
Non-return valve with no water hammer Download PDFInfo
- Publication number
- CN85204412U CN85204412U CN 85204412 CN85204412U CN85204412U CN 85204412 U CN85204412 U CN 85204412U CN 85204412 CN85204412 CN 85204412 CN 85204412 U CN85204412 U CN 85204412U CN 85204412 U CN85204412 U CN 85204412U
- Authority
- CN
- China
- Prior art keywords
- water hammer
- valve body
- valve
- flap
- utility
- 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.)
- Ceased
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- Details Of Valves (AREA)
- Check Valves (AREA)
Abstract
The utility model discloses a non-return valve with no water hammer, belonging to the one-way valves of the elements and components of the mechanical engineering The upper valve body and the lower valve body of the utility model form a land turning flow channel of 45 DEG; a valve plate is positioned at outlet position of the lower valve body of the utility model to form an angle of 40-50 DEG with the vertical direction; the opening angle of a valve clack does not exceed 50 DEG. With the structure, the non-return valve with no water hammer adopts the advanced principle of quick closing, while the valve clack is not weighted up. The utility model has the advantages of simple structure, high safety and convenient maintenance.
Description
The utility model belongs to mechanical engineering unit, parts, the improvement of one-way valve structures.
China continues to use the fifties always and hangs Swing check valve from the old-fashioned single-lobe that the Soviet Union introduces in decades, and this valve flap is vertical when being in closed condition, and its gravity produced closes moment no better than zero.So flap is difficult to close by the gravitational moment effect of self when current arrhea.Cause before flap is closed and may produce reverse current, flap is closed in reverse acceleration current fully.Moment before closing valve because reverse current have reached considerable speed, has just produced sizable pass valve water hammer, and pump and pipeline are damaged.
Japan " openly speciallyying permit communique " clear 53-91427(1978) discloses a kind of change flap structure in " being convenient to prevent the safety check of water hammer ", quickened valve closing, thereby reduced the safety check of water hammer.The characteristics of this valve are the flaps that installs an inclination at the flap downside of former vertical hanging additional, the moment when closing to strengthen main valve clack.The safety check of this structure mainly is to strengthen by total gravitational moment, reduces opening angle, quicken closing velocity, thereby reduced the water hammer value, but this valve can not cut out before producing adverse current, still can produce water hammer, and the complex structure of valve, and weight also increases.
The single-lobe that the utility model is intended to keep the former use of China hangs under the prerequisite of Swing check valve basic structure, closing principle rapidly sets out, valve block is arranged at a rational position, when the forward current arrhea, can close rapidly, produce the purpose of closing the valve water hammer hardly thereby reach.
No water hammer safety check of the present utility model is formed 45 ° of airtight turning runners by valve body up and down.Valve block is arranged on down the valve outlet place, becomes 40～50 ° with Vertical direction.When the current gravitational moment that the formed moment of kinetic pressure of current overcomes flap during by valve body makes it to open, opening angle is 0～50 °.Suddenly drop to zero in a flash in water velocity, flap can be closed rapidly.Thereby guarantee under the various situations of termination of pumping or fault generation, when the forward current stop, can not produce reverse current, avoid taking place water hammer.
The utility model just reaches the purpose that prevents that water hammer from taking place only by valve block is placed rational position.Thereby reduced the various accidents that cause owing to water hammer, associated conduit also needn't be reinforced for preventing that water hammer from damaging, and can save steel, reduces investment.This kind check valve structure is simple simultaneously, and flap alleviates 20% than old-fashioned safety check flap.Since simple in structure, also be convenient to maintenance, safe and reliable.
Describe the concrete structure that the utility model does not have the water hammer safety check in detail below in conjunction with accompanying drawing.
Accompanying drawing is the longitudinal sectional drawing of a kind of concrete structure of the utility model.
With reference to accompanying drawing, upper valve body (1) and following valve body (2) are combined into 45 ° of airtight turning runners.Valve block (5) is arranged on down the outlet port of valve body (2), becomes 40～50 ° of angles with Vertical direction.Valve block (5) and bearing pin (8) are formed flap with rocking bar (3), and and rotating shaft (4) hinge joint.The closed place of flap adds seal ring (6), lower seal (7) sealing.Valve body is joined by connecting bolt (9) and pipeline.It is out-of-date to work as anhydrous circulation like this, the flap closure.At this moment, because the gravity torque of flap own makes flap closed tight.When the resultant moment of force of current kinetic pressure formation had overcome the gravitational moment of flap, flap (4) around the shaft rotated, and runner is opened, and opening angle is 0～50 °.
Calculate and experimental verification through theory, the valve block (5) that the utility model does not have the water hammer safety check is arranged on down valve body (2) outlet port, and during with Vertical direction angle at 45, the flap gravitational moment fullest that plays a role is beneficial to speed most and closes; When the maximum opening angle of flap is 50 °, both can make valve flowing channel unobstructed, can close rapidly again, and avoid water hammer to take place.
Claims (3)
1, a kind of by upper valve body [1], following valve body [2] is formed airtight runner, valve block [5] connects rocking bar [3] by bearing pin [8] and forms flap with rotating shaft [4], adds seal ring [6], lower seal [7], no water hammer safety check by attachment bolt [9] connection, it is characterized in that by upper valve body [1], following valve body [2] is combined into one 45 ° bend, valve block [5] is positioned at the outlet port of valve body [2] down, become 40～50 ° with Vertical direction, the flap opening angle is 0～50 °.
2, it is characterized in that by the described no water hammer safety check of claim 1 valve block (5) is arranged on the outlet port and the Vertical direction angle at 45 of valve body (2).
3, it is characterized in that by the described no water hammer safety check of claim 1 the maximum opening angle of flap is 50 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85204412 CN85204412U (en) | 1985-10-18 | 1985-10-18 | Non-return valve with no water hammer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 85204412 CN85204412U (en) | 1985-10-18 | 1985-10-18 | Non-return valve with no water hammer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN85204412U true CN85204412U (en) | 1986-07-30 |
Family
ID=4799733
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 85204412 Ceased CN85204412U (en) | 1985-10-18 | 1985-10-18 | Non-return valve with no water hammer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85204412U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103075548A (en) * | 2012-12-30 | 2013-05-01 | 张意 | Full-automatic right-side-opened pressure-retaining and unloading safety valve |
| CN103075546A (en) * | 2012-12-30 | 2013-05-01 | 张意 | Full-automatic left-side-opened pressure-retaining and unloading safety valve |
-
1985
- 1985-10-18 CN CN 85204412 patent/CN85204412U/en not_active Ceased
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103075548A (en) * | 2012-12-30 | 2013-05-01 | 张意 | Full-automatic right-side-opened pressure-retaining and unloading safety valve |
| CN103075546A (en) * | 2012-12-30 | 2013-05-01 | 张意 | Full-automatic left-side-opened pressure-retaining and unloading safety valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CE01 | Termination of patent right | ||
| CE01 | Termination of patent right |
Termination date: 19870211 |