CN202852008U - Valve rod of needle valve - Google Patents
Valve rod of needle valve Download PDFInfo
- Publication number
- CN202852008U CN202852008U CN 201220288759 CN201220288759U CN202852008U CN 202852008 U CN202852008 U CN 202852008U CN 201220288759 CN201220288759 CN 201220288759 CN 201220288759 U CN201220288759 U CN 201220288759U CN 202852008 U CN202852008 U CN 202852008U
- Authority
- CN
- China
- Prior art keywords
- valve
- rod
- needle
- valve rod
- locating 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 provides a valve rod of a needle valve. The valve rod comprises a rod body, a valve clack and a locating device. The valve rod is characterized in that a component is installed on the top of the rod body, the locating device is installed on the upper middle portion of the rod body, the locating device is located below the component, a limiting piece is installed on the component, the limiting piece is tightly attached to the locating device, and the valve clack is installed on the lower portion of the rod body. The locating device is installed on the rod body of the valve rod, and therefore excessive pushing of the valve rod is avoided when the needle valve is used. When the valve clack is in close fit with a valve seat, the limiting piece is tightly attached to the locating device, namely the largest distance of motion of the valve clack is fixed, so that the situation of excessive pushing cannot occur when the valve rod is pushed again, damage to the valve clack is avoided, and the service life of the needle valve is prolonged.
Description
Technical field
The utility model relates to valve technology field, relates in particular to a kind of valve rod of needle valve.
Background technique
As everyone knows, needle-valve belongs to a kind of of throttle valve, be widely used by people because its degree of regulation is higher, the valve of needle-valve is needle-like, and the direction action along fluid, by adjusting cooperating of taper valve and valve base chamber on the valve rod, it is long-pending to change flow section, thus adjusting or block fluid flow.Needle-valve aligns with valve seat by 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 on the valve rod, when removing Driving force, elastic member can produce restoring force, orders about valve rod of needle valve and retracts.When using needle-valve, promote valve rod of needle valve 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, then can block fluid flow; Remove when promoting valve rod of needle valve power, valve rod of needle valve retreats under the reaction force of elastic member, away from fluid output, and 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.When using existing needle-valve, the excessive too quickly phenomenon of Driving force usually can appear, so that the situation that valve rod of needle valve when advancing, occurred.In case cross the position, flap is damaged, in the working life of having reduced needle-valve, also can damage fluid output when serious.
Summary of the invention
In order to solve the problems of the technologies described above, the utility model provides a kind of valve rod of needle valve, comprise shaft, flap, positioning device, it is characterized in that described shaft top is provided with parts, the middle and upper part of shaft is provided with positioning device, and positioning device is positioned at the parts below, and described parts are provided with bounding means, described bounding means and positioning device fit tightly, and the shaft bottom is provided with flap.
The beneficial effects of the utility model are: the shaft at valve rod of needle valve is provided with positioning device, thereby valve rod advanced the position when having avoided the use needle-valve.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, had avoided the damage of flap, had prolonged the working life of needle-valve.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Wherein, 1-shaft, 2-flap, 3-bounding means, 4-positioning device, 5-parts.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
As shown in Figure 1, a kind of valve rod of needle valve, comprise shaft 1, flap 2, positioning device 4, shaft 1 top is provided with parts 5, shaft 1 runs through positioning device 4, and positioning device 4 is positioned at parts 5 belows, and parts 5 are provided with bounding means 3, bounding means 3 fits tightly with positioning device 4, and shaft 1 bottom is provided with flap 2.
The positioning hole that cooperates with valve rod of needle valve is arranged in the positioning device 4, and valve rod of needle valve is sleeved in the positioning device 4.Valve rod of needle valve comprises shaft 1 and flap 2, and wherein, some is exposed to shaft 1 outside the positioning device 4.Promote shaft 1 and be exposed to the outer parts 5 of positioning device 4, then cooperating between flap 2 and the valve seat is becoming tight; Remove the power that promotes shaft 1, then cooperate to become pine between flap 2 and the valve seat.Parts 5 are provided with bounding means 3, and when flap 2 and valve seat closely cooperated, bounding means 3 fitted tightly with positioning device 4.That is to say that when promoting shaft 1, bounding means 3 is with shaft 1 action, until flap 2 closely cooperates with valve seat, this moment bounding means 3 with the further action that can stop shaft 1 that fits tightly of positioning device 4, avoided the position.
The above has done detailed explanation with embodiment to the utility model by reference to the accompanying drawings, but the utility model is not limited to this, any those skilled in the art are in the ken that possesses, under the prerequisite of the utility model aim, can make various distortion and modification to it.
Claims (1)
1. valve rod of needle valve, comprise shaft (1), flap (2), positioning device (4), it is characterized in that described shaft (1) top is provided with parts (5), the middle and upper part of shaft (1) is provided with positioning device (4), positioning device (4) is positioned at parts (5) below, described parts (5) are provided with bounding means (3), and described bounding means (3) fits tightly with positioning device (4), and shaft (1) bottom is provided with flap (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220288759 CN202852008U (en) | 2012-06-19 | 2012-06-19 | Valve rod of needle valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220288759 CN202852008U (en) | 2012-06-19 | 2012-06-19 | Valve rod of needle valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202852008U true CN202852008U (en) | 2013-04-03 |
Family
ID=47983213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220288759 Expired - Fee Related CN202852008U (en) | 2012-06-19 | 2012-06-19 | Valve rod of needle valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202852008U (en) |
-
2012
- 2012-06-19 CN CN 201220288759 patent/CN202852008U/en not_active Expired - Fee Related
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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: 20130403 Termination date: 20130619 |