CN203146838U - High-pressure stop valve seat with stress reduction protection - Google Patents
High-pressure stop valve seat with stress reduction protection Download PDFInfo
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- CN203146838U CN203146838U CN 201320156591 CN201320156591U CN203146838U CN 203146838 U CN203146838 U CN 203146838U CN 201320156591 CN201320156591 CN 201320156591 CN 201320156591 U CN201320156591 U CN 201320156591U CN 203146838 U CN203146838 U CN 203146838U
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- valve
- valve seat
- seat
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- pressure stop
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Abstract
The utility model relates to a high-pressure stop valve seat with stress reduction protection. A high-pressure stop valve is provided with a valve rod and a valve body, a valve core is arranged at the bottom of the valve rod, and a valve core sealing face is arranged on the valve core. The high-pressure stop valve is characterized in that the welding type valve seat is arranged in the valve body, a bead weld layer is arranged on the welding type valve seat, a valve seat sealing face is machined on the bead weld layer, and the valve core sealing faces corresponds to the valve seat sealing face; the valve seat and the valve body are fixed in a welding mode, and a circle of stress reduction groove used for reducing welding stress deformation is arranged in the valve seat. The dedicated valve seat is adopted in the high-pressure stop valve, bead welding is carried out on the valve seat to machine the sealing face, then strict heat treatment and lossless check are carried out and the high-pressure stop valve is welded on the valve seat; the stress reduction groove is arranged in the valve seat, and therefore stress in the process of welding can not transmit to the bead weld face of the valve seat.
Description
Technical field
The utility model relates to valving, specially refer to use on a kind of high-pressure stop valve, have a welding type valve seat that subtracts stress protection.
Background technique
The sealing surface of high-pressure stop valve is the key position that guarantees the valve kilter, needs it to have anti-ly to wash away, the characteristic of bite-resistant, to be unlikely to impaired destruction under bigger specific pressure.Just because of above-mentioned high performance requirements, prior art generally adopts on the valve method of built-up welding to improve the performance parameter of sealing surface.The overlaying surface that built-up welding is come out on valve belongs to a kind of cemented carbide in itself, this material has the high and anti-advantage of washing away of hardness, but the fragility that bigger shortcoming is material itself is big, can be easy to crack in case be subjected to stress, and in a single day valve seat has crackle just will scrap.
In stricter application such as power station, as the high-pressure stop valve of high parameter valve, more need adopt strict overlaying method at the more high-level alloy material of its sealing surface place built-up welding, with the quality of most critical position sealing surface on the assurance valve, otherwise difficult quality reaches application requirements.The simple method production high parameter stop valve of built-up welding that adopts can not satisfy its performance requirement, be embodied in the valve inner small space of valve and carry out built-up welding, the shortcoming that has inconvenient operation and surfacing quality difference, often cause difficult quality to hold, and maintenance and reprocess operation and all be not easy to carry out will certainly have influence on performance and the working life of whole high-pressure stop valve.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, and a kind of new high-pressure stop valve structure is provided.The utility model high-pressure stop valve structure is wanted to make to be convenient to built-up welding on the valve seat and to process sealing surface, and can not be out of shape and produce damage defect after the processing, meets the better quality requirement of high parameter valve.
In order to reach the foregoing invention purpose, the technological scheme that the utility model provides is as follows:
A kind of have a high-pressure stop valve valve seat that subtracts stress protection, this high-pressure stop valve is provided with valve rod and valve body, the bottom of described valve rod is spool, be provided with valve core sealed cover at this spool, it is characterized in that, be provided with the welding type valve seat in the described valve body, this welding type valve seat is provided with overlay cladding, be processed with sealing surface of seat at described overlay cladding, this valve core sealed cover is corresponding with described sealing surface of seat; Means of fixation is welding between described valve seat and the valve body, subtracts the stress groove what described valve seat was provided with that a circle be used for to reduce welding stress deformation.
In the utlity model has the high-pressure stop valve valve seat that subtracts the stress protection; described welding type valve seat is for independently being arranged at the absolute construction in the valve body; this absolute construction is an annular table that is fixed in the valve body; the upper surface of this annular table is toroidal surface; the inner edge place of this toroidal surface is processed with sealing surface of seat, the outer rim place of described annular table be and valve body between the welding position.
In the utlity model has the high-pressure stop valve valve seat that subtracts the stress protection; the described annular groove of stress groove for processing at the upper surface of described annular table that subtract; this annular groove is located between the inner edge and outer rim of described annular table upper surface, and this annular groove is coaxial with described annular table.
Based on technique scheme, high-pressure stop valve of the present utility model compared with prior art has following technological merit:
1. high-pressure stop valve of the present utility model produces valve seat specially, and strict heat treatment and nondestructive inspection (NDI) are passed through in separately built-up welding and process sealing surface again on valve seat, are welded on the valve body, to guarantee the quality of sealing surface in the stop valve again.When valve seat adopts the mode of welding to be fixed in the valve body, because the welding stress effect is easy to produce distortion, can produce stress to valve sealing face like this, handling bad meeting cracks sealing surface of seat, for not acting on this stress on the sealing surface of seat, therefore designed and subtract the stress groove, the effect that subtracts the stress groove is that the stress when welding can not be delivered on the valve seat overlaying surface, to ensure the mass stability of valve seat overlaying surface.
Description of drawings
Fig. 1 is the structural representation of prior art mesohigh stop valve.
Fig. 2 is the structural representation of the utility model mesohigh stop valve.
Fig. 3 is the structural representation that has the welding type valve seat that subtracts the stress groove in the utility model mesohigh stop valve.
Embodiment
Below we come high-pressure stop valve of the present utility model done further with specific embodiment by reference to the accompanying drawings and elaborate, form and working state in the hope of understand its structure more cheer and brightly, but can not limit protection domain of the present utility model with this.
The utility model is too small in order to solve in the prior art in the integral type valve body structure built-up welding space, and the shortcoming that surfacing quality is not high is designed independent valve seat in valve body, make a split-type structural.Earlier machine valve sealing face at valve seat, adopt the mode of welding to be fixed in the valve body valve seat again, can guarantee the quality of processing of sealing surface like this, be convenient to operations such as built-up welding and heat treatment.
As shown in Figure 2, the utility model mainly is to have designed a welding type valve seat at high-pressure stop valve, and this high-pressure stop valve is provided with valve rod 1 and valve body 3, is provided with spool 2 in the bottom of valve rod 1, and described spool 2 is provided with valve core sealed cover.Be provided with the valve seat 4 of welding type in above-mentioned valve body 1, this valve seat 4 is provided with overlay cladding, is provided with the sealing surface of seat corresponding with valve core sealed cover at described overlay cladding.Because closing and open by spool being closed on valve seat of valve realizes with unlatching, that is to say, be closely to contact to realize closing of valve by valve core sealed cover and sealing surface of seat, realize valve opening by the valve core sealed cover sealing surface of lifting off a seat.
The valve seat 4 of above-mentioned welding type is for independently being arranged at the absolute construction in the valve body 3, fixedlys connected by the mode of welding between the valve seat 4 of this welding type and the valve body 3, as shown in Figure 3.The valve seat 4 of welding type is for being fixed in an annular table in the valve body 3, and the upper surface of this annular table is toroidal surface, and the inner edge place of this toroidal surface is sealing surface of seat 41, and this sealing surface of seat 41 is corresponding with the valve core sealed cover 21 on the spool 2.The outer rim place of described annular table is the welding position between valve seat 4 and the valve body 3.The utility model is welded on the valve body 3 after adopting valve seat 4 to carry out separately again, through strict heat treatment and nondestructive inspection thereof, guarantees to be welded on the valve seat 3 after the quality before valve seat 4 welding again.
When valve seat 4 and valve body 3 weld, can produce stress to sealing surface of seat 41, handle bad meeting sealing surface of seat 41 is cracked, will have influence on valve performance in case crack, the stability of must ensuring the quality of products.The stress that produces when welding does not fixedly act on the sealing surface of seat 41, and as important feature of the present utility model, we subtract stress groove 5 what described valve seat 4 was provided with that a circle is used for reducing welding stress deformation.
As shown in Figure 3, this subtracts stress groove 5 is an annular groove that processes at the upper surface of annular table, and this annular groove 5 specifically is located between the inner edge and outer rim of described annular table upper surface.Because the overlaying surface of valve seat 4 is a kind of cemented carbide, high and anti-the washing away of its hardness meets the performance requirement of high-pressure stop valve just.But there is the big shortcoming of fragility in this Hardmetal materials, be easy to crack, and in a single day valve seat 4 has crackle just will scrap.When valve seat 4 and valve body 3 are welded together, can produce stress to sealing surface of seat 41, handle bad meeting sealing surface of seat 41 is cracked.For stress will not be acted on the sealing surface of seat 41, therefore designed and subtracted stress groove 5.Subtract stress groove 5 just because of what valve seat 4 was provided with, the stress during welding just can not be delivered on the overlaying surface of valve seat, thereby plays the effect of protection sealing surface of seat.
Claims (3)
1. one kind has the high-pressure stop valve valve seat that subtracts the stress protection, this high-pressure stop valve is provided with valve rod and valve body, the bottom of described valve rod is spool, be provided with valve core sealed cover at this spool, it is characterized in that, be provided with the welding type valve seat in the described valve body, this welding type valve seat is provided with overlay cladding, be processed with sealing surface of seat at described overlay cladding, this valve core sealed cover is corresponding with described sealing surface of seat; Means of fixation is welding between described valve seat and the valve body, subtracts the stress groove what described valve seat was provided with that a circle be used for to reduce welding stress deformation.
2. a kind of high-pressure stop valve valve seat that subtracts stress protection that has according to claim 1; it is characterized in that; described welding type valve seat is for independently being arranged at the absolute construction in the valve body; this absolute construction is an annular table that is fixed in the valve body; the upper surface of this annular table is toroidal surface; the inner edge place of this toroidal surface is processed with sealing surface of seat, the outer rim place of described annular table be and valve body between the welding position.
3. a kind of high-pressure stop valve valve seat that subtracts stress protection that has according to claim 2; it is characterized in that; the described annular groove of stress groove for processing at the upper surface of described annular table that subtract; this annular groove is located between the inner edge and outer rim of described annular table upper surface, and this annular groove is coaxial with described annular table.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320156591 CN203146838U (en) | 2013-04-01 | 2013-04-01 | High-pressure stop valve seat with stress reduction protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320156591 CN203146838U (en) | 2013-04-01 | 2013-04-01 | High-pressure stop valve seat with stress reduction protection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203146838U true CN203146838U (en) | 2013-08-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320156591 Expired - Fee Related CN203146838U (en) | 2013-04-01 | 2013-04-01 | High-pressure stop valve seat with stress reduction protection |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203146838U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103591371A (en) * | 2013-11-20 | 2014-02-19 | 南通龙源电站阀门有限公司 | High-pressure stop valve packing replacing structure under pressure |
| CN104197062A (en) * | 2014-09-02 | 2014-12-10 | 章华 | Structure of sealing surface of valve body of small-diameter high-pressure forged steel stop valve |
| US9689364B2 (en) | 2015-08-03 | 2017-06-27 | Caterpillar Inc. | Vented high pressure valve |
-
2013
- 2013-04-01 CN CN 201320156591 patent/CN203146838U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103591371A (en) * | 2013-11-20 | 2014-02-19 | 南通龙源电站阀门有限公司 | High-pressure stop valve packing replacing structure under pressure |
| CN104197062A (en) * | 2014-09-02 | 2014-12-10 | 章华 | Structure of sealing surface of valve body of small-diameter high-pressure forged steel stop valve |
| US9689364B2 (en) | 2015-08-03 | 2017-06-27 | Caterpillar Inc. | Vented high pressure valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20181031 Address after: 201316 No. 80-86, hang Du Road, barley Bay Industrial Zone, Pudong New Area, Shanghai. Patentee after: POWERCHINA SPEM COMPANY LIMITED Address before: 201200 4 and 5 buildings of No. 852 Chengfeng Road, Chuansha Town, Pudong New Area, Shanghai Patentee before: Shanghai Hua'erde Power Station Valve Co., Ltd. |
|
| 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: 20130821 Termination date: 20200401 |