CN203384430U - Slow-closing lift check valve - Google Patents
Slow-closing lift check valve Download PDFInfo
- Publication number
- CN203384430U CN203384430U CN201320470646.7U CN201320470646U CN203384430U CN 203384430 U CN203384430 U CN 203384430U CN 201320470646 U CN201320470646 U CN 201320470646U CN 203384430 U CN203384430 U CN 203384430U
- Authority
- CN
- China
- Prior art keywords
- valve
- slow
- lift check
- check valve
- closing lift
- 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 - Fee Related
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Abstract
The utility model discloses a slow-closing lift check valve. The slow-closing lift check valve comprises a valve body, through pipes are located at the front end and the rear end of the valve body in the same horizontal direction, a valve rod and an axial flow sleeve are arranged in the valve body, the valve rod is provided with a valve clack, a sealing surface matched with the valve clack is arranged in the valve body, and one end of the valve rod is placed in the axial flow sleeve. The slow-closing lift check valve is characterized in that a buffering chamber is arranged at one end port of the valve body, the other end of the valve rod is placed in the buffering chamber in a movable fit mode, and two sides and the end port of the buffering chamber are provided with more than one ventilation hole. According to the slow-closing lift check valve, the buffering chamber is arranged at the bottom of the valve, so that when the slow-closing lift check valve starts to be closed, air is exhausted through the large holes, and the slow-closing lift check valve can be closed rapidly; when the slow-closing lift check valve is nearly closed, the air can be exhausted only through the small holes, closing of the valve clack is slowed down under the throttling action, and finally, the slow-closing lift check valve is closed stably; the slow-closing lift check valve has no impact or vibration and is long in service life.
Description
Technical field
The utility model relates to a kind of safety check, particularly the Slow Close lift check valve.
Background technique
Vertical lift check valve is to lean on the restoring force of spring and the strength of medium refluence to realize closing.Close in a short period of time, reverse flow can cause that water flow in pipeline pressure sharply rises, and produces water attack.The pressure that water attack causes raises, and reaches as high as thousands of times of pipeline normal operating pressure.Also can make in addition pipeline negative pressure occur.The pressure of fluctuation, can make the pipe-line system judder continuously, produces noise, and hammering sound, cause the accidents such as equipment and valve destruction.
The model utility content
The purpose of this utility model be in order to solve above-mentioned the deficiencies in the prior art, provide a kind of steadily, without the Slow Close lift check valve of impact and vibration, long service life.
To achieve these goals, the Slow Close lift check valve that the utility model is designed, comprise valve body, rear and front end on valve body same level direction is siphunculus, be provided with valve rod and axial flow cover in valve body, valve rod is provided with flap, be provided with the sealing surface matched with flap in valve body, one end of valve rod is placed in the axial flow cover, it is characterized in that: a port of valve body is provided with buffer cell, the other end of described valve rod is placed in the buffering indoor activities and coordinates, and the both sides of described buffer cell, port are provided with more than one vent.
Preferably, the diameter of the vent of described buffer cell both sides is greater than the diameter of buffer cell port.
Preferably, between flap and axial flow cover, be provided with spring, the end face of described spring one end and flap is conflicted, and the other end and axial flow cover are conflicted.
The Slow Close lift check valve that the utility model obtains, be provided with the buffer cell structure in the bottom of valve, when just starting to close, by the macropore exhaust, can quick closedown, when closing on when closing, can only pass through the aperture exhaust, due to throttling action, flap is closed and is slowed down, and finally closes reposefully, without impacting, friction, long service life.
The accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model;
Fig. 2 is Slow Close lift check valve closed condition structural representation.
In figure: valve body 1, valve rod 2, buffer cell 3, axial flow cover 4, spring 5, flap 21, sealing surface 22, the first vent 31, the second vent 32.
Embodiment
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Embodiment:
As shown in Figure 1 and Figure 2, the Slow Close lift check valve that the present embodiment provides, comprise valve body 1, rear and front end on valve body same level direction is siphunculus, be provided with valve rod 2 and axial flow cover 4 in valve body, valve rod 2 is provided with flap 21, be provided with the sealing surface 22 matched with flap 21 in valve body 2, one end of valve rod 2 is placed in axial flow cover 4, what axial flow overlapped the airflow design of 4 profiles and body cavity airflow design has constituted the line style runner, calculate accurately and design make runner area of passage fully and be consistent, the pressure loss is little, fluid stable, without cavitation erosion.Valve rod 2 produces negative pressure and spring thrust seat next time when media flow, without medium, valve rod 2 back sides is directly impacted; Therefore, this valve is the low noise valve.One port of valve body is provided with buffer cell 3, the other end of described valve rod 2 is placed in the buffering indoor activities and coordinates, the both sides of described buffer cell, port are provided with more than one vent, vent has the first vent 31 and the second vent 32, and the diameter of the vent of described buffer cell 3 both sides is greater than the diameter of buffer cell port.
Be provided with the buffer cell structure at valve, when just starting to close, by the second vent 32 exhausts, can quick closedown, when closing on when closing, can only pass through the first vent 31 exhausts, due to throttling action, valve rod 2 is closed and is slowed down.
Be provided with spring 5 between described flap 21 and axial flow cover 4, the end face of described spring 5 one ends and flap 21 is conflicted, and the other end and axial flow cover 4 are conflicted.
The Slow Close lift check valve more than obtained: monomer structure, lightweight, good rigidly, be convenient to safeguard; The thrust of spring 5 makes in sight use of valve rod 2 do the used time without pressure medium, also can process closed position; Good supporting means makes valve, and no matter during in what mounting point, valve rod and valve seat all can good centerings, therefore valve can arbitrarily angledly be installed.
The special surface of the supporting of valve rod rear and front end and flap is processed and structural design, has overcome recurrent jam phenomenon in similar valve using process, opens and closes steadily; Avoided because gravity factor causes the flap centering poor simultaneously, the sealing pair unbalance stress, between twice action, the sealing pair anastomotic position is inconsistent and affect the defect of sealability, makes sealing pair all the time in good stressed and identical state.
Accurate design is used spring thrust to be slightly larger than the friction sum between valve rod gravity and valve rod and front and back supporting when valve rod is in the closed position; valve rod both can return the seat sealing when low-pressure and any installation; can realize low-pressure opening again, lower pump startup load, the security of operation of protection pump.
Claims (3)
1. a Slow Close lift check valve, comprise valve body, rear and front end on valve body same level direction is siphunculus, be provided with valve rod and axial flow cover in valve body, valve rod is provided with flap, is provided with the sealing surface matched with flap in valve body, one end of valve rod is placed in the axial flow cover, it is characterized in that: a port of valve body is provided with buffer cell, and the other end of described valve rod is placed in the buffering indoor activities and coordinates, and the both sides of described buffer cell, port are provided with more than one vent.
2. Slow Close lift check valve according to claim 1, it is characterized in that: the diameter of the vent of described buffer cell both sides is greater than the diameter of buffer cell port.
3. Slow Close lift check valve according to claim 1, is characterized in that: be provided with spring between flap and axial flow cover, the end face conflict of described spring one end and flap, the other end and the conflict of axial flow cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320470646.7U CN203384430U (en) | 2013-07-24 | 2013-07-24 | Slow-closing lift check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320470646.7U CN203384430U (en) | 2013-07-24 | 2013-07-24 | Slow-closing lift check valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203384430U true CN203384430U (en) | 2014-01-08 |
Family
ID=49872922
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320470646.7U Expired - Fee Related CN203384430U (en) | 2013-07-24 | 2013-07-24 | Slow-closing lift check valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203384430U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105909833A (en) * | 2016-06-27 | 2016-08-31 | 天津市国威给排水设备制造有限公司 | Air supplementing device of backflow preventer |
| CN108167523A (en) * | 2018-01-22 | 2018-06-15 | 博纳斯威阀门股份有限公司 | A kind of slowly closed silencing check valve with built-in damping system |
-
2013
- 2013-07-24 CN CN201320470646.7U patent/CN203384430U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105909833A (en) * | 2016-06-27 | 2016-08-31 | 天津市国威给排水设备制造有限公司 | Air supplementing device of backflow preventer |
| CN105909833B (en) * | 2016-06-27 | 2020-04-14 | 天津市国威给排水设备制造有限公司 | Air supplement unit of backflow preventer |
| CN108167523A (en) * | 2018-01-22 | 2018-06-15 | 博纳斯威阀门股份有限公司 | A kind of slowly closed silencing check valve with built-in damping system |
| CN108167523B (en) * | 2018-01-22 | 2023-10-31 | 博纳斯威阀门股份有限公司 | Silencing slow-closing check valve with built-in damping system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140108 Termination date: 20210724 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |