CN208935509U - A kind of sealing structure for protecting spool valve seat - Google Patents
A kind of sealing structure for protecting spool valve seat Download PDFInfo
- Publication number
- CN208935509U CN208935509U CN201821206289.2U CN201821206289U CN208935509U CN 208935509 U CN208935509 U CN 208935509U CN 201821206289 U CN201821206289 U CN 201821206289U CN 208935509 U CN208935509 U CN 208935509U
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- Prior art keywords
- spool
- valve seat
- overlay cladding
- sealing
- section
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Abstract
The utility model relates to a kind of sealing structures for protecting spool valve seat; including being arranged in the spool overlay cladding (2) on spool (1) and the valve seat overlay cladding (3) being arranged on valve seat (4); the spool overlay cladding (2) includes seal spool section and spool protection section; the seal spool section and the valve seat overlay cladding (3) contact with each other and form sealing surface; valve seat (4) upper surface is provided with first annular slot around valve seat overlay cladding (3), and the spool protection section extends downward into the first annular slot.Compared with prior art; the utility model can be avoided medium and directly wash away sealing surface; improve the sealing of valve; and can achieve the effect that protect sealing surface, extend valve service life, furthermore uses unique linear sealing structure; guarantee tightness; suitable for the steam-water pipe of High Pressure Difference, safeguard structure does not influence the switch of spool and use and can be effectively protected spool valve seat in the outside of sealing surface.
Description
Technical field
The utility model relates to valve mechanisms, more particularly, to a kind of sealing structure for protecting spool valve seat.
Background technique
With the continuous improvement of China's fired power generating unit parameter, the parameter and requirement to valve are also higher and higher.Valve it is close
Cover is to guarantee its critical positions for well running, and the sealing of valve is tight contacting between to complete by spool and valve seat,
Existing this structure medium when valve is run directly washes away spool and valve seat, and prolonged operation just will affect its sealing
Property.Therefore, protecting and improve sealing structure is an important factor for running valve for a long time.
Existing valvular structure is as depicted in figs. 1 and 2, which has the following defects, and one side medium directly washes away close
Cover influences the sealing performance of valve, on the other hand, does not have safeguard measure at spool sealing surface of seat, reduces valve and uses the longevity
Life, increases maintenance cost.
Utility model content
The purpose of this utility model is exactly to provide a kind of protection spool to overcome the problems of the above-mentioned prior art
The sealing structure of valve seat.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of sealing structure for protecting spool valve seat including the spool overlay cladding being arranged on spool and is arranged on valve seat
Valve seat overlay cladding, the spool overlay cladding includes seal spool section and spool protection section, the seal spool section and the valve
Seat overlay cladding contacts with each other and forms sealing surface, and the valve seat upper surface is provided with first annular slot around valve seat overlay cladding, described
Spool protection section extends downward into the first annular slot.
Further, the first annular trough wall surface of the spool protection section bottom and valve seat is in gap setting.
Further, be provided with the second annular groove on the inside of spool lower surface spool protection section, the valve seat overlay cladding to
On extend in second annular groove.
Further, the second annular groove wall surface of valve seat overlay cladding top and spool is in gap setting.
Further, the sealing surface in the seal spool section is different with the tilt angle of the sealing surface of valve seat overlay cladding,
So that seal spool section is contacted with valve seat overlay cladding in linear sealing.
Further, it is machined with chamfering on the spool overlay cladding, valve seat overlay cladding and annular groove, reduces medium to valve
Core and valve seat wash away.
When valve is processed, built-up welding is first carried out on spool and valve seat to produce the overlay cladding for meeting valve performance, so
Sealing surface is processed on overlay cladding afterwards, and processes the annular groove met the requirements in spool and valve seat.
When valve opening, medium can first pass through and pass through sealing surface outside spool overlay cladding and valve seat overlay cladding, avoid straight
It connects and washes away sealing surface, largely protect sealing surface.
Compared with prior art, the utility model can be avoided medium and directly wash away sealing surface, improve the sealing of valve, and
It can achieve the effect that protect sealing surface, extend valve service life, furthermore use unique linear sealing structure, guarantee tightness,
Suitable for the steam-water pipe of High Pressure Difference, safeguard structure does not influence the switch of spool and use and can have in the outside of sealing surface
Effect ground protection spool valve seat.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of valve in the prior art；
Fig. 2 is the partial enlarged view of a-quadrant in Fig. 1；
Fig. 3 is the valve mechanism schematic diagram of the utility model application；
Fig. 4 is the partial enlarged view of B area in Fig. 3.
Shown in figure label:
1, spool, 2, spool overlay cladding, 3, valve seat overlay cladding, 4, valve seat.
Specific embodiment
The utility model is described in detail in the following with reference to the drawings and specific embodiments.
Embodiment
A kind of sealing structure for protecting spool valve seat, as shown in Figure 3 and Figure 4, including the spool built-up welding being arranged on spool 1
Layer 2 and the valve seat overlay cladding 3 being arranged on valve seat 4, spool overlay cladding 2 include that seal spool section and spool protect section, and spool is close
Envelope section and valve seat overlay cladding 3 contact with each other and form sealing surface, and 4 upper surface of valve seat is provided with first annular around valve seat overlay cladding 3
Slot, spool protection section extend downward into the first annular slot, and spool protects the first annular trough wall surface of section bottom and valve seat 4
In gap setting.It is provided with the second annular groove on the inside of spool lower surface spool protection section, valve seat overlay cladding 3 extends upwardly to the second ring
In shape slot, the second annular groove wall surface of 3 top of valve seat overlay cladding and spool 1 is in gap setting.Sealing surface in seal spool section
It is different with the sealing surface cone angle of valve seat overlay cladding 3, it is contacted with linear sealing.On spool overlay cladding 2, valve seat overlay cladding 3 and annular groove
It is machined with chamfering, medium is reduced and spool and valve seat is washed away.
When valve is processed, built-up welding is carried out on spool 1 and valve seat 4 first to producing the overlay cladding for meeting valve performance,
Then sealing surface is processed on overlay cladding, and processes the annular groove met the requirements respectively on spool 1 and valve seat 4.
When valve opening, medium can be first passed through outside spool overlay cladding 2 and valve seat overlay cladding 3, weakened through annular groove and impacted
Power passes through sealing surface, avoids directly washing away sealing surface, largely protects sealing surface.
It can understand the above description of the embodiments is intended to facilitate those skilled in the art and use practical
It is novel.Person skilled in the art obviously easily can make various modifications to these embodiments, and illustrating herein
General Principle be applied in other embodiments without having to go through creative labor.Therefore, the utility model is not limited to above-mentioned
Embodiment, those skilled in the art's announcement according to the present utility model, do not depart from improvement that the utility model scope is made and
Modification should be all within the protection scope of the utility model.
Claims (6)
1. a kind of sealing structure for protecting spool valve seat, which is characterized in that including the spool overlay cladding being arranged on spool (1)
(2) and valve seat overlay cladding (3) on valve seat (4) is set, the spool overlay cladding (2) includes seal spool section and spool protection
Section, the seal spool section contact with each other and seal with the valve seat overlay cladding (3), and valve seat (4) upper surface surrounds valve seat
Overlay cladding (3) is provided with first annular slot, and the spool protection section extends downward into the first annular slot.
2. a kind of sealing structure for protecting spool valve seat according to claim 1, which is characterized in that the spool protects section
The annular groove wall surface of bottom and valve seat (4) is in gap setting.
3. a kind of sealing structure for protecting spool valve seat according to claim 1, which is characterized in that the spool lower surface
The second annular groove is provided on the inside of spool protection section, valve seat overlay cladding (3) corresponding position extends upwardly to second annular
In slot.
4. a kind of sealing structure for protecting spool valve seat according to claim 3, which is characterized in that the valve seat overlay cladding
(3) the second annular groove wall surface of top and spool (1) is in gap setting.
5. a kind of sealing structure for protecting spool valve seat according to claim 1, which is characterized in that the seal spool section
On sealing surface and the sealing surface of valve seat overlay cladding (3) tilt angle it is different so that seal spool section and the valve seat built-up welding
Layer (3) is contacted in linear sealing.
6. a kind of sealing structure for protecting spool valve seat according to claim 1, which is characterized in that the spool overlay cladding
(2), chamfering is machined on valve seat overlay cladding (3) and annular groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821206289.2U CN208935509U (en) | 2018-07-27 | 2018-07-27 | A kind of sealing structure for protecting spool valve seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821206289.2U CN208935509U (en) | 2018-07-27 | 2018-07-27 | A kind of sealing structure for protecting spool valve seat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208935509U true CN208935509U (en) | 2019-06-04 |
Family
ID=66716758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821206289.2U Active CN208935509U (en) | 2018-07-27 | 2018-07-27 | A kind of sealing structure for protecting spool valve seat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208935509U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114522817A (en) * | 2022-04-21 | 2022-05-24 | 山西海普瑞科技有限公司 | Nozzle structure for preventing high-pressure water jet from being damaged |
-
2018
- 2018-07-27 CN CN201821206289.2U patent/CN208935509U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114522817A (en) * | 2022-04-21 | 2022-05-24 | 山西海普瑞科技有限公司 | Nozzle structure for preventing high-pressure water jet from being damaged |
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