CN208919463U - A kind of plug valve valve rod sealing device - Google Patents
A kind of plug valve valve rod sealing device Download PDFInfo
- Publication number
- CN208919463U CN208919463U CN201821793830.4U CN201821793830U CN208919463U CN 208919463 U CN208919463 U CN 208919463U CN 201821793830 U CN201821793830 U CN 201821793830U CN 208919463 U CN208919463 U CN 208919463U
- Authority
- CN
- China
- Prior art keywords
- pressing ring
- valve rod
- inverted
- type section
- convex
- 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 kind of plug valve valve rod sealing devices, including valve rod, stuffing box is installed on the valve rod, filler group is equipped in the stuffing box, the filler group is from top to bottom by recessed pressing ring, inverted V type section circle and convex pressing ring composition, the top of the inverted V type section circle is located in the cavity of the recessed pressing ring, the protrusion of the convex pressing ring is located in the V-arrangement cavity of inverted V type section circle, several oil ducts are provided on the protrusion of the convex pressing ring, the convex pressing ring is axially arranged with axial oilhole, each oil duct is connected to the axial oilhole, the top of the recessed pressing ring is equipped with gland.Its structure of this sealing device is simple, and maintenance convenience has good sealing effect.
Description
Technical field
The utility model belongs to valve technology field, more particularly to a kind of plug valve valve rod sealing device.
Background technique
Currently, the small medium such as particle is accessible to for having the plug valve to work in medium gritty in sewage etc.
Valve rod position, so that the positions such as valve rod are impacted, so that the abrasion of valve rod is more serious, meanwhile, filler frictional force is larger,
The not high problems of valve rod stability also affect the sealing performance of valve, make medium be easy to leak, affect making for valve
Use the service life.As the structure that 2336172 Y of patent CN is provided can only be made to guarantee valve seal No leakage by compressed spring
Hold-down grid applies effective pretightning force to multiple filling layers.
Summary of the invention
The purpose of this utility model is to provide a kind of blocking gravel performance is good, medium is not easy the plug valve valve rod to leak
Sealing device.
For achieving the above object, the technical solution adopted by the present invention are as follows: a kind of plug valve valve rod sealing device, including
Valve rod is equipped with stuffing box on the valve rod, is equipped with filler group in the stuffing box, the filler group is from top to bottom by recessed pressure
The top of circle, inverted V type section circle and convex pressing ring composition, the inverted V type section circle is located in the cavity of the recessed pressing ring, described convex
The protrusion of pressing ring is located in the V-arrangement cavity of inverted V type section circle, and several oil ducts are provided on the protrusion of the convex pressing ring, described
Convex pressing ring is axially arranged with axial oilhole, and each oil duct is connected to the axial oilhole, the top installation of the recessed pressing ring
There is gland.
In above scheme, it is also equipped with thrust washer and sand control axle envelope on the valve rod, the sand control axle envelope and described fills out
Axle sleeve is equipped between hopper.
In above scheme, the quantity of the inverted V type section circle is multiple.
The advantages of the utility model: 1, since sand control axle envelope multi-sealed, when medium flows through at the sand control axle envelope, gravel
And some other minute impurities are blocked fully outside, to reduce the friction of valve shaft, extend its service life；2, convex pressure
Circle, multiple inverted V type section circles, recessed pressing ring are mounted in stuffing box from top to bottom, and multiple inverted V type section circle can provide for abrasion
Self-compensating, and can be realized and be sealed by self-tightening when with concave-convex type sub-assembly synergy.After by Fluid pressure, energy
It is enough to provide self-compensating for abrasion, to realize the technical purpose of zero leakage under self-tightening and the collective effect of packing seal.3,
Filler group structure compression face of the invention is lip, is able to bear certain eccentric motion and eccentric load, impact resistance and antivibration
It is dynamic.
Detailed description of the invention
Fig. 1 is the utility model plug valve valve rod leak-proof structure schematic diagram.
Fig. 2 is the structural schematic diagram of the utility model filler group.
Fig. 3 is the recessed ring pressing construction schematic diagram of the utility model.
Fig. 4 is the utility model inverted V type section coil structures schematic diagram.
Fig. 5 is the convex ring pressing construction schematic diagram of the utility model
In figure: 1. thrust washers, 2. sand control axle envelopes, 3. axle sleeves, 4. filler groups, the recessed pressing ring of 4-1., 4-2. inverted V type section
Circle, the convex pressing ring of 4-3., 4-3-1. oil duct, 4-3-2 axial direction oilhole, 5 glands, 6 valve rods.
Specific embodiment
The present invention will be further explained below with reference to the attached drawings.
As depicted in figs. 1 and 2, a kind of plug valve valve rod sealing device of the present embodiment, including valve rod 6 are installed on valve rod 6
There is stuffing box, filler group 4 is equipped in the stuffing box, the filler group 4 encloses 4- by recessed pressing ring 4-1, inverted V type section from top to bottom
The top of 2 and convex pressing ring 4-3 composition, the inverted V type section circle 4-2 is located in the cavity of the recessed pressing ring 4-1, the convex pressing ring
The protrusion of 4-3 is located in the V-arrangement cavity of inverted V type section circle 4-2, is provided with several oil ducts on the protrusion of the convex pressing ring 4-3
4-3-1's, the convex pressing ring 4-3 is axially arranged with axial oilhole 4-3-2, each oil duct 4-3-1 and the axial oilhole 4-
3-2 is connected to (as shown in Figure 5), and the top of the recessed pressing ring 4-1 is equipped with gland 5, and the gland 5 presses filler group 4
Tightly in stuffing box.Sand control axle envelope 2 and thrust washer 1, the sand control axis are sequentially installed on valve rod 6 below the stuffing box
It is positioned between envelope 2 and the stuffing box by axle sleeve 3.The thrust washer has been filled up and has not been advised existing for machining surface
Then property, while preventing because being under pressure, leakage caused by burn into and pipeline expand with heat and contract with cold naturally.The sand control axle envelope is close to
It prevents impurity from entering abrasion valve rod in valve rod, and using multiple-sealed, and is in close contact with axle sleeve and thrust washer.
As shown in Fig. 2, the filler group in the stuffing box, SStuffing box depth is represented, value is S=A+C+n*B；In formula:A is indicatedThe thickness of convex pressing ring,CIndicate the thickness of recessed pressing ring,BIndicate the thickness of single inverted V type section circle,nIndicate the filler group
The number of middle V-shaped seal ring.
As shown in figure 5, being provided with several oil duct 4-3-1 on the protrusion of convex pressing ring 4-3, the convex pressing ring 4-3's is axially arranged with
Axial oilhole 4-3-2, each oil duct 4-3-1 are connected to the axial direction oilhole 4-3-2, are added to inverted V type with making homogeneous media
On the compression face of section circle, inverted V type section circle radical can be selected according to pressure, obtain optimal seal effect by pressing force, together
Shi Duochong inverted V type section circle can provide self-compensating for abrasion, and the inverted V type section circle in the present embodiment is polytetrafluoroethylene (PTFE) material
Material, therefore it is easily-deformable, it in the higher situation of temperature and pressure, may be squeezed out from radial clearance, therefore, its value is most when design
It may select smaller, generally take 0.1 ~ 0.15mm.
Claims (3)
1. a kind of plug valve valve rod sealing device, including valve rod (6), which is characterized in that be equipped with filler on the valve rod (6)
Case, the stuffing box is interior to be equipped with filler group (4), and the filler group (4) is enclosed by recessed pressing ring (4-1), inverted V type section from top to bottom
The top of (4-2) and convex pressing ring (4-3) composition, the inverted V type section circle (4-2) is located in the cavity of the recessed pressing ring (4-1),
The protrusion of the convex pressing ring (4-3) be located at the inverted V type section circle (4-2) V-arrangement cavity in, the convex pressing ring (4-3) it is convex
It is provided in portion several oil ducts (4-3-1), the convex pressing ring (4-3) is axially arranged with axial oilhole (4-3-2), each oil duct
(4-3-1) is connected to the axial oilhole (4-3-2), is equipped with gland (5) above the recessed pressing ring (4-1).
2. a kind of plug valve valve rod sealing device according to claim 1, which is characterized in that also pacify on the valve rod (6)
Equipped with thrust washer (1) and sand control axle envelope (2), axle sleeve (3) are equipped between the sand control axle envelope (2) and the stuffing box.
3. a kind of plug valve valve rod sealing device according to claim 1, which is characterized in that (4- is enclosed in the inverted V type section
2) quantity is multiple.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821793830.4U CN208919463U (en) | 2018-11-01 | 2018-11-01 | A kind of plug valve valve rod sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821793830.4U CN208919463U (en) | 2018-11-01 | 2018-11-01 | A kind of plug valve valve rod sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208919463U true CN208919463U (en) | 2019-05-31 |
Family
ID=66711316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821793830.4U Expired - Fee Related CN208919463U (en) | 2018-11-01 | 2018-11-01 | A kind of plug valve valve rod sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208919463U (en) |
-
2018
- 2018-11-01 CN CN201821793830.4U patent/CN208919463U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190531 Termination date: 20191101 |