CN202188141U - Valve rod of needle valve - Google Patents
Valve rod of needle valve Download PDFInfo
- Publication number
- CN202188141U CN202188141U CN2011203224792U CN201120322479U CN202188141U CN 202188141 U CN202188141 U CN 202188141U CN 2011203224792 U CN2011203224792 U CN 2011203224792U CN 201120322479 U CN201120322479 U CN 201120322479U CN 202188141 U CN202188141 U CN 202188141U
- Authority
- CN
- China
- Prior art keywords
- valve
- needle
- valve rod
- rod
- positioning device
- 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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- Lift Valve (AREA)
Abstract
The utility model discloses a valve rod of a needle valve, which is embedded in a positioning device of a valve seat. The valve rod of the needle valve comprises a rod body and a valve clack, wherein a limit piece is arranged on the part (exposed out of the positioning device) of the rod body; and when the valve clack is in tight fit with the valve seat, the limit piece is clung to the positioning device tightly. By adoption of the valve rod of the needle valve, the maximum action distance of the valve clack is fixed, so that overposition is avoided when the valve rod is pushed, and the service life of the valve rod of the needle valve is prolonged.
Description
Technical field
The utility model relates to a kind of throttle valve valve rod, particularly a kind of needle-valve valve rod.
Background technique
Needle-valve is a kind of throttle valve, owing to degree of regulation is widely used than higher.The valve of needle-valve is needle-like, and the action of the direction of longshore current body, thereby blocks or the regulated fluid flow with cooperating so that the change flow section is long-pending of valve base chamber through the taper valve of adjustment valve rod.
Needle-valve aligns with valve seat through positioning device, and the shaft that has drive unit to promote valve rod in the end of needle-valve simultaneously moves to valve seat; Also be provided with elastic member, when removing the power of promotion, elastic member can produce restoring force, orders about the valve seat action in the other direction of needle-valve valve rod.
When using needle-valve:
Promote the needle-valve valve rod and stretch into valve seat, at this moment, flap cooperates with valve base chamber and is becoming tight, and the sectional area of fluid output diminishes, and fluid flow diminishes thereupon; When flap and valve base chamber closely cooperate, block fluid flow;
Remove the power that promotes the needle-valve valve rod, at this moment, the needle-valve valve rod is retreated away from fluid output under the reaction force of elastic member, the flap and the pine that also becomes cooperating of valve base chamber, thus the sectional area of fluid output increases, and fluid flow increases thereupon.
Yet when using existing needle-valve, it is excessive too quickly Driving force usually can to occur, makes the needle-valve valve rod occur the situation of position when advancing.In case cross the position, then easily flap is caused damage, reduce the working life of needle-valve, also can damage fluid output when serious.
The model utility content
The technical problem that the utility model will solve is: overcome the defective that exists in the needle-valve valve rod of existing technology, a kind of needle-valve valve rod that limit stoper is arranged is provided, valve rod advanced the position when avoiding the use of needle-valve.
In order to achieve the above object, the technological scheme of the utility model employing is:
The needle-valve valve rod is sleeved in the positioning device of valve seat, and the needle-valve valve rod comprises shaft and flap, it is characterized in that: the position of exposing positioning device at shaft is provided with bounding means, and when flap and valve seat closely cooperated, said bounding means and positioning device fitted tightly.
Adopt technique scheme, the utility model has reached following beneficial effect with respect to existing technology:
When flap and valve base chamber closely cooperated, bounding means and positioning device fitted tightly, and that is to say, the action ultimate range of flap is fixed, thereby promoted the situation that the position can not appear in valve rod yet again.
Description of drawings
Fig. 1 is the structural representation of the preferred implementation of the utility model needle-valve valve rod;
Fig. 2 is the plan view of the valve rod of mode of execution shown in Figure 1.
Embodiment
Below in conjunction with accompanying drawing and preferred implementation the utility model is done further explanation.
What Fig. 1 showed is the structural representation of the preferred implementation of the utility model needle-valve valve rod; Fig. 2 is the plan view of the valve rod of this mode of execution.As shown in the figure, in this mode of execution, what the positioning device of valve seat (not shown) used is setscrew nut 4, and the positioning hole that cooperates with the needle-valve valve rod is arranged in the setscrew nut 4, and the needle-valve valve stem casing is contained in the setscrew nut 4.The needle-valve valve rod comprises shaft 1 and flap 2, and wherein, some is exposed at shaft 1 outside the positioning device 4.What promote shaft 1 is exposed at the outer position 11 of positioning device 4, and then cooperating between flap 2 and the valve seat is becoming tight; Remove the power that promotes shaft 11, then cooperate to become pine between flap 2 and the valve seat.
The position 11 that is exposed at outside the positioning device 4 at shaft 1 is provided with bounding means 3, and when flap 2 and valve seat closely cooperated, said bounding means 3 fitted tightly with positioning device 4.That is to say that when promoting shaft 1, bounding means 3 can closely cooperate up to flap 2 and valve seat with shaft 1 action, this moment bounding means 3 with the further action that can stop shaft that fits tightly of positioning device 4, avoided the position.
As a kind of preferred, said bounding means 3 is a fastening piece, for example preset stop nut, screw mandrel, position-limited lever etc.Further preferred said bounding means 3 is: the jump ring groove that on shaft, is provided with, and with the corresponding jump ring of jump ring groove.
Combine accompanying drawing and embodiment that the utility model has been done detailed explanation above; But the utility model is not limited to this; The technician in any present technique field is in the ken that is possessed; Under the prerequisite of the utility model aim, can make various distortion and modification to it.
Claims (3)
1. needle-valve valve rod; Be sleeved in the positioning device of valve seat, the needle-valve valve rod comprises shaft and flap, it is characterized in that: the position that is exposed at outside the positioning device at shaft is provided with bounding means; When flap and valve seat closely cooperated, said bounding means and positioning device fitted tightly.
2. needle-valve valve rod according to claim 1 is characterized in that: said bounding means is a fastening piece.
3. needle-valve valve rod according to claim 2 is characterized in that: said bounding means is: the jump ring groove that on shaft, is provided with, and with the corresponding jump ring of jump ring groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203224792U CN202188141U (en) | 2011-08-31 | 2011-08-31 | Valve rod of needle valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203224792U CN202188141U (en) | 2011-08-31 | 2011-08-31 | Valve rod of needle valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202188141U true CN202188141U (en) | 2012-04-11 |
Family
ID=45919593
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011203224792U Expired - Fee Related CN202188141U (en) | 2011-08-31 | 2011-08-31 | Valve rod of needle valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202188141U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313050A (en) * | 2011-08-31 | 2012-01-11 | 昆山三智电子工业有限公司 | Valve rod of needle valve |
-
2011
- 2011-08-31 CN CN2011203224792U patent/CN202188141U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313050A (en) * | 2011-08-31 | 2012-01-11 | 昆山三智电子工业有限公司 | Valve rod of needle valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120411 Termination date: 20130831 |