CN205639846U - Valve rod leak -proof structure - Google Patents
Valve rod leak -proof structure Download PDFInfo
- Publication number
- CN205639846U CN205639846U CN201620454327.0U CN201620454327U CN205639846U CN 205639846 U CN205639846 U CN 205639846U CN 201620454327 U CN201620454327 U CN 201620454327U CN 205639846 U CN205639846 U CN 205639846U
- Authority
- CN
- China
- Prior art keywords
- valve
- valve rod
- inner edge
- seal
- proof structure
- 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.)
- Withdrawn - After Issue
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Abstract
The utility model discloses a valve rod leak -proof structure, wherein, include: valve body, valve body include closed hole and interior shoulder face, and interior shoulder face sets up the lower extreme at the closed hole, the closed hole upper portion at the valve body is installed to valve gap, valve gap, the valve rod, the valve rod rotatably sets up in the valve body to pass the hole of valve gap, seal, seal hold in the closed hole of valve body, and encircle the valve rod periphery, and the seal includes base member and spider, and the spider holds in the base member. The utility model discloses can automatic compensation clearance, sealed reliable when the valve rod rotates.
Description
Technical field
This utility model relates to valve field, is specifically related to a kind of valve rod leak-proof structure.
Background technology
At present, the valve stem seal of valve typically uses O to seal, and O seals
Need it is carried out pre-extrusion so that it is produce elastic deformation, thus be close to valve rod and valve body table
Face, thus produce sealing function, and during O just uses, often because of valve rod
Valve body surface it can be produced friction, or because insufficient lubrication and valve body pressure and temp are too high,
Make O deform, wear and tear, reverse, thus cause the sealing between valve rod and valve body to be lost
Effect.
Chinese patent CN201220157355.8 discloses a kind of valve rod of floating ball valve and seals knot
Structure, including valve body, the top of described valve body is provided with valve gap, and the middle part of described valve gap is provided with valve
Bar installing hole, is provided with valve rod, sets between described valve rod and valve gap in described valve rod installing hole
There is gland, in the cavity below described gland, be filled with filler, described filler
Lower end is provided with O-ring seals.Although this utility model enhances the performance of sealing, stop
The possibility that leaks outside, plays saving loss and environment protecting, but at the severe building ring of valve
In border, its sealing fully relies on O-ring seals and ensures, under long High Temperature High Pressure,
O RunddichtringO is as easy as rolling off a log to follow the string, and produces friction with valve rod valve body, causes leakage.
Chinese patent CN200820032543.1 discloses one and has self-fastening sealing structure
High tension instrument ball valve rod seal apparatus, it is characterised in that: at the valve of high tension instrument ball valve
A kind of dual-seal being made up of O-ring seals and wedge shape sealing ring it is provided with between bar and valve body
Structure, wedge shape sealing ring and O are arranged in the annular groove of stem bottom, and wedge shape is close
Seal ring is in close contact with valve rod boss inclined-plane, and O is tight with bottom portion of groove and valve body inner bore
Contiguity is touched.This utility model improves the politef that current small-bore gauge ball valve is conventional
Column and flap seal structure cause because producing cold flow under a certain pressure valve rod with
The problem that between valve body, sealing effectiveness is the best, this utility model uses O-ring seals and wedge shape close
Seal ring dual-seal, can increase sealing reliability to a certain extent, but cost mistake when manufacturing
Height, assembles loaded down with trivial details, as long as one of them potted component lost efficacy, directly results in another and seals
Element lost efficacy in succession.
Therefore be badly in need of a kind of when reversing automatic compensation gap, seal reliable valve stem seal knot
Structure.
Utility model content
This utility model is for the problems referred to above, it is provided that one can compensate automatically when valve rod rotates
Gap, seal reliable valve rod leak-proof structure.
The technical scheme in the invention for solving the above technical problem is: a kind of valve stem seal
Structure, wherein, including: valve body, valve body includes sealing hole and interior shoulder face, and interior shoulder face is arranged
In the lower end sealing hole；Valve gap, valve gap is arranged on the top, sealing hole of valve body；Valve rod, valve
Bar can be rotatably set in valve body, and through the endoporus of valve gap；Seal, seal
It is contained in the sealing hole of valve body, and around stem outer circumference, seal includes matrix and spider,
Spider is contained in matrix.
Further, matrix includes body, upper flange and lower flange, body cincture in the form of a ring
At stem outer circumference, upper flange is circumferentially positioned on body cylindrical, upper flange along body radially to
Outer and be inclined upwardly and extend and keep out on the seal face of the inwall and valve gap that seal hole, under
Flange is circumferentially positioned on body cylindrical, and lower flange radially outward and downward-sloping prolongs along body
Stretch and keep out on the interior shoulder face of the inwall and valve body that seal hole.
Further, matrix also includes inner edge and lower inner edge, and upper inner edge is circumferentially positioned at
In body inner circle, upper inner edge radially inwardly and upwardly tilts extend and keep out at valve along body
On the outer peripheral face of bar and the seal face of valve gap, lower inner edge is circumferentially positioned in body inner circle, under
Inner edge along body radially-inwardly and downward-sloping extension and keep out valve rod outer peripheral face and
On the interior shoulder face of valve body.
Further, upper inner edge and surface radially inward, lower inner edge are equipped with some
Individual projection.
Further, spider includes support body, upper leg and lower support leg, and support body is contained in this
Internal and around the central axis of body, support body cross section is curved, and upper leg is connected to frame
The upper end of body, lower support leg is connected to the lower end of support body.
Further, upper foot cross section is curved, and one end of upper leg is connected to support body
Upper end, the other end of upper leg extends to upper flange, and lower support leg cross section is curved, under
One end of leg is connected to the lower end of support body, and the other end of lower support leg extends to lower flange.
Further, spider also includes connector and lower connector, the one of upper connector
End is connected to the upper end of support body, and the other end of upper connector extends to inner edge, lower connector
One end be connected to the lower end of support body, the other end of lower connector extends to lower inner edge.
Further, spider also includes compression sheet and lower compression sheet, and upper compression sheet accommodates
In upper inner edge and around the central axis of body, one end of upper compression sheet is connected to connection
The other end of body, in lower compression sheet is contained in lower inner edge and around the central axis of body, under
The one end compressing sheet is connected to the other end of lower connector.
Further, the cross section of upper connector and lower connector is the most Z-shape.
Further, the cross section of upper compression sheet and lower compression sheet all takes the shape of the letter U.
The utility model has the advantages that:
1. in this utility model, spider is contained in matrix, and the upper leg other end extends
To upper flange, the lower support leg other end extends to lower flange, upper foot cross section
Curved, lower support leg cross section is curved, curved make leg and under
Leg has certain elasticity, and therefore upper flange and lower flange rotate at valve rod
Time, it is possible to against the endoporus of valve body under the keeping out of upper leg and lower support leg,
The endoporus making valve body seals reliable with seal；
2. in this utility model, upper compression sheet is contained in inner edge, and lower compression sheet holds
Being contained in lower inner edge, the cross section of upper connector and lower connector is the most Z-shape,
The cross section of upper compression sheet and lower compression sheet all takes the shape of the letter U, and Z-shaped and U-shaped is tied
Structure makes between connector, lower connector, upper compression sheet and lower compression sheet
Produce certain elasticity, simultaneously when projection is rotated by valve rod, upper connection
The Interaction Force of body, lower connector, upper compression sheet and lower compression sheet supports
To protruding frictional force when gear valve rod rotates, can automatically compensate valve rod simultaneously and turn
The minim gap produced between valve rod and projection time dynamic so that seal reliable；
3., in this utility model, upper inner edge and surface radially inward, lower inner edge set
Having several protruding, protruding arranges the frictional force that can reduce with valve rod,
Protruding can accept on compress sheet and lower compression sheet against power, make against power
Protruding generation micro-strain, makes protruding and valve stem seal contact area increase,
Improve the reliability sealed；
4., in this utility model, upper flange is kept out and is being sealed inwall and the pressure of valve gap in hole
On tight face, lower flange is kept out on the interior shoulder face of the inwall and valve body that seal hole,
Upper inner edge is kept out on the outer peripheral face of valve rod and the seal face of valve gap, lower inner edge
Keep out on the outer peripheral face of valve rod and the interior shoulder face of valve body, simultaneously at spider
Under the effect of each component part so that seal more reliable.
In addition to objects, features and advantages described above, this utility model also has it
Its objects, features and advantages.Below with reference to figure, this utility model is made the most in detail
Thin explanation.
Accompanying drawing explanation
Constitute the part of this specification, be used for being further appreciated by accompanying drawing of the present utility model and show
Go out preferred embodiment of the present utility model, and be used for illustrating that this practicality is new together with description
The principle of type.In the accompanying drawings:
Fig. 1 is perspective view of the present utility model；
Fig. 2 is front view of the present utility model；
Fig. 3 is sectional perspective structural representation of the present utility model；
Fig. 4 is perspective view of the present utility model；And
Fig. 5 is front view of the present utility model.
Wherein, figure is labeled as:
1 it is valve rod, 2 is valve gap, 3 is valve body, 4 is seal, 5 is matrix, 51 is
Body, 52 be upper flange, 53 for lower flange, 54 for upper inner edge, 55 for lower inner edge, 56
For protruding, 6 be spider, 61 be support body, 62 be upper leg, 63 be lower support leg, 64 be
Upper connector, 65 be lower connector, 66 be upper compression sheet, 67 for lower compression sheet.
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail, but this reality
Implement by the novel multitude of different ways that can be defined by the claims and cover.
Referring to figs. 1 to Fig. 5, a kind of valve rod leak-proof structure as shown in Figure 1, wherein, it is somebody's turn to do
Valve rod leak-proof structure includes valve rod 1, valve gap 2, valve body 3 and seal 4.
As shown in Figures 2 and 3, valve body 3 includes sealing hole and interior shoulder face, and interior shoulder face is arranged
In the lower end sealing hole；Valve gap 2 is arranged on the top, sealing hole of valve body 3；Valve rod 1 can revolve
It is arranged in valve body 3 with turning, and through the endoporus of valve gap 2；Seal 4 is contained in valve
In the sealing hole of body 3, and around valve rod 1 periphery, seal 4 includes matrix 5 and spider
6, as shown in Figure 4, spider 6 is contained in matrix 5.
As it is shown in figure 5, matrix 5 includes body 51, upper flange 52 and lower flange 53, this
Body 51 is looped around valve rod 1 periphery in the form of a ring, and upper flange 52 is circumferentially positioned at outside body 51
On circle, upper flange 52 radially outwardly and upwardly extends along body 51 and keeps out close
On the inwall of sealing of hole and the seal face of valve gap 2, lower flange 53 is circumferentially positioned at outside body 51
On circle, lower flange 53 is along body 51 radially outward and downward-sloping extension and keeping out close
On the inwall of sealing of hole and the interior shoulder face of valve body 3.
As it is shown in figure 5, matrix 5 also includes inner edge 54 and lower inner edge 55, upper inner edge 54
Being circumferentially positioned in body 51 inner circle, upper inner edge 54 is along body 51 radially inwardly and upwardly
Tilt extend and keep out on the outer peripheral face of valve rod 1 and the seal face of valve gap 2, lower inner edge
55 are circumferentially positioned in body 51 inner circle, lower inner edge 55 along body 51 radially-inwardly and to
Lower inclination extends and keeps out on the outer peripheral face of valve rod 1 and the interior shoulder face of valve body 3.
Preferably, if being equipped with on upper inner edge 54 and surface radially inward, lower inner edge 55
Dry protruding 56.
As it is shown in figure 5, spider 6 includes support body 61, upper leg 62 and lower support leg 63, frame
In body 61 is contained in body 51 and around the central axis of body 51, support body 61 cross section
Curved, upper leg 62 is connected to the upper end of support body 61, and lower support leg 63 is connected to support body
The lower end of 61.
As it is shown in figure 5, upper leg 62 cross section is curved, one end of upper leg 62 connects
In the upper end of support body 61, the other end of upper leg 62 extends to upper flange 52, lower support leg
63 cross sections are curved, and one end of lower support leg 63 is connected to the lower end of support body 61, lower support leg
The other end of 63 extends to lower flange 53.
As it is shown in figure 5, spider 6 also includes connector 64 and lower connector 65, upper company
One end of junctor 64 is connected to the upper end of support body 61, and the other end of upper connector 64 extends
Supreme inner edge 54, one end of lower connector 65 is connected to the lower end of support body 61, lower connector
The other end of 65 extends to lower inner edge 55.
As it is shown in figure 5, spider 6 also includes compression sheet 66 and lower compression sheet 67, upper pressure
In tight sheet 66 is contained in inner edge 54 and around the central axis of body 51, upper compression sheet
One end of 66 is connected to the other end of connector 64, and lower compression sheet 67 is contained in lower inner edge
The 55 interior and central axis of cincture body 51, one end of lower compression sheet 67 is connected to lower connection
The other end of body 65.
Preferably, the cross section of upper connector 64 and lower connector 65 is the most Z-shape.
Preferably, the cross section of upper compression sheet 66 and lower compression sheet 67 all takes the shape of the letter U.
From the foregoing, in this valve rod leak-proof structure, spider 6 is contained in matrix 5,
Spider 6 is one-body molded with matrix 5, thus spider 6 and matrix 5 are completely embedded, matrix 5
Stress deformation directly affect the deformation of spider 6, the additionally direct shadow of the stress deformation of spider 6
Ringing the deformation of matrix 5, upper leg 62 other end extends to upper flange 52, and lower support leg 63 is another
One end extends to lower flange 53, and upper leg 62 cross section is curved, lower support leg 63 cross section
Curved, curved make leg 62 and lower support leg 63 have certain elasticity, therefore
Upper flange 52 and lower flange 53 are when valve rod rotates, it is possible at upper leg 62 and lower support leg
Against the endoporus of valve body 3 under the keeping out of 63, making the endoporus of valve body 3 seal with seal 4 can
Lean on.
In this valve rod leak-proof structure, upper compression sheet 66 is contained in inner edge 54, presses down
Tight sheet 67 is contained in lower inner edge 55, meanwhile, and upper compression sheet 66 and lower compression sheet 67
One side keeps out the transversal of projection 56, upper connector 64 and lower connector 65 the most radially inward
Face is the most Z-shape, and the cross section of upper compression sheet 66 and lower compression sheet 67 all takes the shape of the letter U, Z-shaped
Upper connector 64, lower connector 65, upper compression sheet 66 and lower compression is made with U-shaped structure
Certain elasticity is produced between sheet 67, simultaneously when protruding 56 are rotated by valve rod, upper company
Junctor 64, lower connector 65, upper compression sheet 66 and the interphase interaction of lower compression sheet 67
Power keeps out frictional force when valve rod rotates to protruding 56, can automatically compensate valve rod simultaneously and rotate
Time valve rod and protruding 56 between the minim gap that produces so that seal reliable.
In this valve rod leak-proof structure, upper inner edge 54 and lower inner edge 55 table radially inward
Face is provided with several projections 56, protruding 56 the frictional force that can reduce with valve rod is set,
Protruding 56 can accept on compress sheet 66 and lower compression sheet 67 against power, make against power
Protruding 56 produce micro-strain, make protruding 56 to increase with valve stem seal contact area, improve
The reliability sealed.
In this valve rod leak-proof structure, upper flange 52 is kept out and is being sealed inwall and the valve gap 2 in hole
Seal face on, lower flange 53 is kept out on the interior shoulder face sealing the inwall in hole and valve body 3,
Upper inner edge 54 is kept out on the outer peripheral face of valve rod 1 and the seal face of valve gap 2, lower inner edge 55
Keep out on the outer peripheral face of valve rod 1 and the interior shoulder face of valve body 3, simultaneously at each group of spider 6
Become under the effect of part so that seal more reliable.
These are only preferred embodiment of the present utility model, be not limited to this practicality
Novel, for a person skilled in the art, this utility model can have various change and
Change.All within spirit of the present utility model and principle, any amendment of being made, equivalent
Replacement, improvement etc., within should be included in protection domain of the present utility model.
Claims (10)
1. a valve rod leak-proof structure, it is characterised in that including:
Valve body (3), described valve body (3) includes sealing hole and interior shoulder face, described interior shoulder
Face is arranged on the lower end sealing hole；
Valve gap (2), described valve gap (2) is arranged on the top, sealing hole of valve body (3)；
Valve rod (1), described valve rod (1) can be rotatably set in valve body (3),
And the endoporus through valve gap (2)；
Seal (4), described seal (4) is contained in the sealing hole of valve body (3)
In, and around valve rod (1) periphery, described seal (4) include matrix (5) and
Spider (6), described spider (6) is contained in matrix (5).
Valve rod leak-proof structure the most according to claim 1, it is characterised in that described matrix (5)
Including body (51), upper flange (52) and lower flange (53), described body (51)
Being looped around valve rod (1) periphery in the form of a ring, described upper flange (52) is circumferentially positioned at this
On body (51) cylindrical, described upper flange (52) along body (51) radially outward and to
Upper inclination extends and keeps out on the seal face of the inwall and valve gap (2) that seal hole,
Described lower flange (53) is circumferentially positioned on body (51) cylindrical, described lower flange (53)
Along body (51) radially outward and downward-sloping extension and keep out seal hole inwall
And on the interior shoulder face of valve body (3).
Valve rod leak-proof structure the most according to claim 2, it is characterised in that described matrix (5)
Also including inner edge (54) and lower inner edge (55), described upper inner edge (54) is around setting
Put in body (51) inner circle, described upper inner edge (54) along body (51) radially to
In and be inclined upwardly and extend and keep out at the outer peripheral face of valve rod (1) and valve gap (2)
On seal face, described lower inner edge (55) is circumferentially positioned in body (51) inner circle, institute
State lower inner edge (55) along body (51) radially-inwardly and downward-sloping extension and keeping out
On the outer peripheral face of valve rod (1) and the interior shoulder face of valve body (3).
Valve rod leak-proof structure the most according to claim 3, it is characterised in that described upper inner edge
(54) several and it are equipped with on surface radially inward, lower inner edge (55) protruding
(56)。
Valve rod leak-proof structure the most according to claim 4, it is characterised in that described spider (6)
Including support body (61), upper leg (62) and lower support leg (63), described support body (61)
It is contained in body (51) and around the central axis of body (51), described support body (61)
Cross section is curved, and described upper leg (62) is connected to the upper end of support body (61), institute
State lower support leg (63) and be connected to the lower end of support body (61).
Valve rod leak-proof structure the most according to claim 5, it is characterised in that described upper leg
(62) cross section is curved, and one end of described upper leg (62) is connected to support body (61)
Upper end, the other end of described upper leg (62) extends to upper flange (52), described
Lower support leg (63) cross section is curved, and one end of described lower support leg (63) is connected to frame
The lower end of body (61), the other end of described lower support leg (63) extends to lower flange (53).
Valve rod leak-proof structure the most according to claim 6, it is characterised in that described spider (6)
Also include connector (64) and lower connector (65), described upper connector (64)
One end be connected to the upper end of support body (61), the other end of described upper connector (64)
Extending to inner edge (54), one end of described lower connector (65) is connected to support body (61)
Lower end, the other end of described lower connector (65) extends to lower inner edge (55).
Valve rod leak-proof structure the most according to claim 7, it is characterised in that described spider (6)
Also include compression sheet (66) and lower compression sheet (67), described upper compression sheet (66)
It is contained in inner edge (54) and around the central axis of body (51), described upper pressure
One end of tight sheet (66) is connected to the other end of connector (64), described lower compression
Sheet (67) is contained in lower inner edge (55) and around the central axis of body (51),
One end of described lower compression sheet (67) is connected to the other end of lower connector (65).
Valve rod leak-proof structure the most according to claim 8, it is characterised in that described upper connection
The cross section of body (64) and lower connector (65) is the most Z-shape.
Valve rod leak-proof structure the most according to claim 8, it is characterised in that described upper compression
The cross section of sheet (66) and lower compression sheet (67) all takes the shape of the letter U.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620454327.0U CN205639846U (en) | 2016-05-18 | 2016-05-18 | Valve rod leak -proof structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620454327.0U CN205639846U (en) | 2016-05-18 | 2016-05-18 | Valve rod leak -proof structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205639846U true CN205639846U (en) | 2016-10-12 |
Family
ID=57056697
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620454327.0U Withdrawn - After Issue CN205639846U (en) | 2016-05-18 | 2016-05-18 | Valve rod leak -proof structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205639846U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105805407A (en) * | 2016-05-18 | 2016-07-27 | 德施普科技发展温州有限公司 | Valve rod sealing structure |
-
2016
- 2016-05-18 CN CN201620454327.0U patent/CN205639846U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105805407A (en) * | 2016-05-18 | 2016-07-27 | 德施普科技发展温州有限公司 | Valve rod sealing structure |
| CN105805407B (en) * | 2016-05-18 | 2018-05-22 | 林淑录 | A kind of valve rod leak-proof structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20161012 Effective date of abandoning: 20180522 |