CN1409038A - Composite elastic hard sealing - Google Patents
Composite elastic hard sealing Download PDFInfo
- Publication number
- CN1409038A CN1409038A CN 01126854 CN01126854A CN1409038A CN 1409038 A CN1409038 A CN 1409038A CN 01126854 CN01126854 CN 01126854 CN 01126854 A CN01126854 A CN 01126854A CN 1409038 A CN1409038 A CN 1409038A
- Authority
- CN
- China
- Prior art keywords
- valve
- valve seat
- sealing
- metal
- seal ring
- 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.)
- Pending
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Abstract
The copmosite elastic hard sealing is double-layered composite sealing structure for valve. The sealing pair between the valve seat and the valve clack is metal to metal. There are toothed grooves on the valve seat and injected silicon rubber, outer metal valve seat, and one retainer to limit the metal valve seat. The other party for sealing is also metal integrated on or attached to the valve clack. The composite sealing ring has excellent resilience, capacity of compensating the interval caused by machining error and thus high sealing performance, high sealing pressure and high resistance to abrasion and corrosion. The present invnetion is suitable for gate valve, stop valve, non-return valve, reducing valve and other reciprocating clack valve.
Description
Technical field
The present invention relates to a kind of composite elastic hard sealing, is a kind of valve seal pattern, belongs to the machinery valve field, is applicable to gate valve, stop valve, safety check, reduction valve, fixing reciprocal flap formula valve such as taper control valve.
Background technique
The sealing problem of valve is the most critical technology in valve design and the application.Valve seal is divided into soft seal and hard sealing two big classes usually, the main metal to metal that adopts of wherein hard sealing, owing to be mainly used in the place of high-voltage high-speed medium, strict to the hardness of sealing pair metal, erosion resistance, physical and chemical performance such as corrosion-resistant, but because the flexible and elasticity of metal is relatively poor, to the requirement on machining accuracy height of sealing surface, processing cost costliness.Metal to metal seal belongs to a kind of forced seal, needs bigger steering force, and need add blocking device when closing.This is a urgent problem in this field.
Summary of the invention
The present invention solves the defective that exists in the prior art by following technical solution:
Sealing pair between valve seat and flap adopts metal to metal.Have a few dentation grooves on the valve block, the periphery is a metal seat valve, and the middle gluey silicone rubber of injection also solidifies, and end has a back-up ring to carry out spacing to metal seat valve.Another sealing pair also is a metal, different according to working medium and pressure, can with the flap one, or processing invests on the flap then separately.
Because valve seat is a two-layer composite, the two-layer up and down material of selecting different physical and chemical performances for use.The upper strata sealing pair directly contacts with another sealing pair with flowing medium, mainly selects specialty metal material wear-resistant, corrosion-resistant, erosion resistance for use; Lower floor mainly selects the better materials of elasticity such as silicone rubber for use.Because bottom rubber has better elastic, can provide certain pretightening force to guarantee sealing, simultaneously the effective compensation sealing coupled face gap of bringing of the flexible deformation of rubber owing to machining error.The sealing of composite valve seat, rebound elasticity improve a lot than traditional hard sealing.
Accompanying drawing and explanation
Can more clearly understand technology contents of the present invention and purpose effect with reference to accompanying drawing.
Fig. 1 is a composite elastic hard sealing sectional view of the present invention.
Symbol description is as follows among the figure:
1 flap seal ring
2 valve seat inserts
3 seal ring bed courses
4 fixing bolts
5 spacing back-up rings
6 valve seats
7 MEDIA FLOW to
8 flap moving direction
Embodiment
As shown in Figure 1, composite elastic hard sealing of the present invention is by flap seal ring 1, valve seat insert 2 is formed, valve seat insert 2 is enclosed on the valve seat 6, a few dentation grooves are respectively arranged on valve seat 6 and the valve seat insert 2, there is a spacing back-up ring 5 rear end, but valve seat insert 2 is limited free floating within the specific limits, and spacing back-up ring 5 is fastening by fixing bolt 4 and valve seat 6.In the dentation groove of 5 of valve seat 6, valve seat insert 2 and spacing back-up rings, inject silicone rubber (being seal ring bed course 3) and solidify.That is to say that seal ring is a two-layer composite, form that seal ring bed course 3 is installed the back at seal ring 2 and injected curing in gluey mode by valve seat insert 2 and seal ring bed course 3.6 of valve seat insert 2 and valve seats pass through 3 unsteady connections of flexuose silicone rubber.The axial compression flap, and rely on the rebound elasticity of valve seat insert 2 to guarantee sealing, compensated the micro-gap between coupled face, increased the seal pressure of 2 of flap seal ring 1 and valve seat inserts, improved sealability.
In sum, this composite elastic hard sealing has improved sealability and sealing load, and can compensate between coupled face because the error that processing brings, compare with traditional hard sealing, guaranteed original sealing reliability, processing is simple, need not big operation power of enforcement, and need not install closing-locking device additional.
Claims (3)
1, a kind of composite elastic hard sealing, it is by flap seal ring (1), valve seat insert (2), seal ring bed course (3), fixing bolt (4), spacing back-up ring (5) and valve seat formations such as (6), it is characterized in that: seal ring is a two-layer composite, be made up of valve seat insert (2) and seal ring bed course (3), seal ring bed course (3) is installed the back at seal ring (2) and is injected curing in gluey mode.
2, composite elastic hard sealing as claimed in claim 1 is characterized in that: connect by flexuose silicone rubber (3) is unsteady between valve seat insert (2) and valve seat (6).
3, composite elastic hard sealing as claimed in claim 1 is characterized in that: there is a spacing back-up ring (5) valve seat insert (2) rear end, with valve seat insert (2) but restriction free floating within the specific limits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01126854 CN1409038A (en) | 2001-09-25 | 2001-09-25 | Composite elastic hard sealing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 01126854 CN1409038A (en) | 2001-09-25 | 2001-09-25 | Composite elastic hard sealing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1409038A true CN1409038A (en) | 2003-04-09 |
Family
ID=4666858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 01126854 Pending CN1409038A (en) | 2001-09-25 | 2001-09-25 | Composite elastic hard sealing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1409038A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102575780A (en) * | 2010-02-26 | 2012-07-11 | 海飞真空管有限公司 | Multi-seal Knife Gate Valve |
-
2001
- 2001-09-25 CN CN 01126854 patent/CN1409038A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102575780A (en) * | 2010-02-26 | 2012-07-11 | 海飞真空管有限公司 | Multi-seal Knife Gate Valve |
| CN102575780B (en) * | 2010-02-26 | 2014-11-12 | 海飞真空管有限公司 | Multi-seal Knife Gate Valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |